1 /*
   2  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/classLoader.hpp"
  27 #include "classfile/javaAssertions.hpp"
  28 #include "classfile/javaClasses.hpp"
  29 #include "classfile/symbolTable.hpp"
  30 #include "classfile/systemDictionary.hpp"
  31 #include "classfile/vmSymbols.hpp"
  32 #include "gc_interface/collectedHeap.inline.hpp"
  33 #include "interpreter/bytecode.hpp"
  34 #include "memory/oopFactory.hpp"
  35 #include "memory/universe.inline.hpp"
  36 #include "oops/fieldStreams.hpp"
  37 #include "oops/instanceKlass.hpp"
  38 #include "oops/objArrayKlass.hpp"
  39 #include "oops/method.hpp"
  40 #include "prims/jvm.h"
  41 #include "prims/jvm_misc.hpp"
  42 #include "prims/jvmtiExport.hpp"
  43 #include "prims/jvmtiThreadState.hpp"
  44 #include "prims/nativeLookup.hpp"
  45 #include "prims/privilegedStack.hpp"
  46 #include "runtime/arguments.hpp"
  47 #include "runtime/dtraceJSDT.hpp"
  48 #include "runtime/handles.inline.hpp"
  49 #include "runtime/init.hpp"
  50 #include "runtime/interfaceSupport.hpp"
  51 #include "runtime/java.hpp"
  52 #include "runtime/javaCalls.hpp"
  53 #include "runtime/jfieldIDWorkaround.hpp"
  54 #include "runtime/os.hpp"
  55 #include "runtime/perfData.hpp"
  56 #include "runtime/reflection.hpp"
  57 #include "runtime/vframe.hpp"
  58 #include "runtime/vm_operations.hpp"
  59 #include "services/attachListener.hpp"
  60 #include "services/management.hpp"
  61 #include "services/threadService.hpp"
  62 #include "utilities/copy.hpp"
  63 #include "utilities/defaultStream.hpp"
  64 #include "utilities/dtrace.hpp"
  65 #include "utilities/events.hpp"
  66 #include "utilities/histogram.hpp"
  67 #include "utilities/top.hpp"
  68 #include "utilities/utf8.hpp"
  69 #ifdef TARGET_OS_FAMILY_linux
  70 # include "jvm_linux.h"
  71 #endif
  72 #ifdef TARGET_OS_FAMILY_solaris
  73 # include "jvm_solaris.h"
  74 #endif
  75 #ifdef TARGET_OS_FAMILY_windows
  76 # include "jvm_windows.h"
  77 #endif
  78 #ifdef TARGET_OS_FAMILY_bsd
  79 # include "jvm_bsd.h"
  80 #endif
  81 
  82 #include <errno.h>
  83 
  84 #ifndef USDT2
  85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
  86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
  87 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
  88 #endif /* !USDT2 */
  89 
  90 /*
  91   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
  92   such ctors and calls MUST NOT come between an oop declaration/init and its
  93   usage because if objects are move this may cause various memory stomps, bus
  94   errors and segfaults. Here is a cookbook for causing so called "naked oop
  95   failures":
  96 
  97       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
  98           JVMWrapper("JVM_GetClassDeclaredFields");
  99 
 100           // Object address to be held directly in mirror & not visible to GC
 101           oop mirror = JNIHandles::resolve_non_null(ofClass);
 102 
 103           // If this ctor can hit a safepoint, moving objects around, then
 104           ComplexConstructor foo;
 105 
 106           // Boom! mirror may point to JUNK instead of the intended object
 107           (some dereference of mirror)
 108 
 109           // Here's another call that may block for GC, making mirror stale
 110           MutexLocker ml(some_lock);
 111 
 112           // And here's an initializer that can result in a stale oop
 113           // all in one step.
 114           oop o = call_that_can_throw_exception(TRAPS);
 115 
 116 
 117   The solution is to keep the oop declaration BELOW the ctor or function
 118   call that might cause a GC, do another resolve to reassign the oop, or
 119   consider use of a Handle instead of an oop so there is immunity from object
 120   motion. But note that the "QUICK" entries below do not have a handlemark
 121   and thus can only support use of handles passed in.
 122 */
 123 
 124 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
 125   ResourceMark rm;
 126   int line_number = -1;
 127   const char * source_file = NULL;
 128   const char * trace = "explicit";
 129   InstanceKlass* caller = NULL;
 130   JavaThread* jthread = JavaThread::current();
 131   if (jthread->has_last_Java_frame()) {
 132     vframeStream vfst(jthread);
 133 
 134     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
 135     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
 136     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
 137     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
 138     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
 139 
 140     Method* last_caller = NULL;
 141 
 142     while (!vfst.at_end()) {
 143       Method* m = vfst.method();
 144       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
 145           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
 146           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
 147         break;
 148       }
 149       last_caller = m;
 150       vfst.next();
 151     }
 152     // if this is called from Class.forName0 and that is called from Class.forName,
 153     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 154     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 155     bool found_it = false;
 156     if (!vfst.at_end() &&
 157         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 158         vfst.method()->name() == vmSymbols::forName0_name()) {
 159       vfst.next();
 160       if (!vfst.at_end() &&
 161           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 162           vfst.method()->name() == vmSymbols::forName_name()) {
 163         vfst.next();
 164         found_it = true;
 165       }
 166     } else if (last_caller != NULL &&
 167                last_caller->method_holder()->name() ==
 168                vmSymbols::java_lang_ClassLoader() &&
 169                (last_caller->name() == vmSymbols::loadClassInternal_name() ||
 170                 last_caller->name() == vmSymbols::loadClass_name())) {
 171       found_it = true;
 172     } else if (!vfst.at_end()) {
 173       if (vfst.method()->is_native()) {
 174         // JNI call
 175         found_it = true;
 176       }
 177     }
 178     if (found_it && !vfst.at_end()) {
 179       // found the caller
 180       caller = vfst.method()->method_holder();
 181       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 182       if (line_number == -1) {
 183         // show method name if it's a native method
 184         trace = vfst.method()->name_and_sig_as_C_string();
 185       }
 186       Symbol* s = caller->source_file_name();
 187       if (s != NULL) {
 188         source_file = s->as_C_string();
 189       }
 190     }
 191   }
 192   if (caller != NULL) {
 193     if (to_class != caller) {
 194       const char * from = caller->external_name();
 195       const char * to = to_class->external_name();
 196       // print in a single call to reduce interleaving between threads
 197       if (source_file != NULL) {
 198         tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
 199       } else {
 200         tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
 201       }
 202     }
 203   }
 204 }
 205 
 206 void trace_class_resolution(Klass* to_class) {
 207   EXCEPTION_MARK;
 208   trace_class_resolution_impl(to_class, THREAD);
 209   if (HAS_PENDING_EXCEPTION) {
 210     CLEAR_PENDING_EXCEPTION;
 211   }
 212 }
 213 
 214 // Wrapper to trace JVM functions
 215 
 216 #ifdef ASSERT
 217   class JVMTraceWrapper : public StackObj {
 218    public:
 219     JVMTraceWrapper(const char* format, ...) {
 220       if (TraceJVMCalls) {
 221         va_list ap;
 222         va_start(ap, format);
 223         tty->print("JVM ");
 224         tty->vprint_cr(format, ap);
 225         va_end(ap);
 226       }
 227     }
 228   };
 229 
 230   Histogram* JVMHistogram;
 231   volatile jint JVMHistogram_lock = 0;
 232 
 233   class JVMHistogramElement : public HistogramElement {
 234     public:
 235      JVMHistogramElement(const char* name);
 236   };
 237 
 238   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
 239     _name = elementName;
 240     uintx count = 0;
 241 
 242     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
 243       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
 244         count +=1;
 245         if ( (WarnOnStalledSpinLock > 0)
 246           && (count % WarnOnStalledSpinLock == 0)) {
 247           warning("JVMHistogram_lock seems to be stalled");
 248         }
 249       }
 250      }
 251 
 252     if(JVMHistogram == NULL)
 253       JVMHistogram = new Histogram("JVM Call Counts",100);
 254 
 255     JVMHistogram->add_element(this);
 256     Atomic::dec(&JVMHistogram_lock);
 257   }
 258 
 259   #define JVMCountWrapper(arg) \
 260       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
 261       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
 262 
 263   #define JVMWrapper(arg1)                    JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
 264   #define JVMWrapper2(arg1, arg2)             JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
 265   #define JVMWrapper3(arg1, arg2, arg3)       JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
 266   #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
 267 #else
 268   #define JVMWrapper(arg1)
 269   #define JVMWrapper2(arg1, arg2)
 270   #define JVMWrapper3(arg1, arg2, arg3)
 271   #define JVMWrapper4(arg1, arg2, arg3, arg4)
 272 #endif
 273 
 274 
 275 // Interface version /////////////////////////////////////////////////////////////////////
 276 
 277 
 278 JVM_LEAF(jint, JVM_GetInterfaceVersion())
 279   return JVM_INTERFACE_VERSION;
 280 JVM_END
 281 
 282 
 283 // java.lang.System //////////////////////////////////////////////////////////////////////
 284 
 285 
 286 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 287   JVMWrapper("JVM_CurrentTimeMillis");
 288   return os::javaTimeMillis();
 289 JVM_END
 290 
 291 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
 292   JVMWrapper("JVM_NanoTime");
 293   return os::javaTimeNanos();
 294 JVM_END
 295 
 296 
 297 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 298                                jobject dst, jint dst_pos, jint length))
 299   JVMWrapper("JVM_ArrayCopy");
 300   // Check if we have null pointers
 301   if (src == NULL || dst == NULL) {
 302     THROW(vmSymbols::java_lang_NullPointerException());
 303   }
 304   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 305   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 306   assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
 307   assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
 308   // Do copy
 309   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 310 JVM_END
 311 
 312 
 313 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 314   JavaValue r(T_OBJECT);
 315   // public synchronized Object put(Object key, Object value);
 316   HandleMark hm(THREAD);
 317   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 318   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
 319   JavaCalls::call_virtual(&r,
 320                           props,
 321                           KlassHandle(THREAD, SystemDictionary::Properties_klass()),
 322                           vmSymbols::put_name(),
 323                           vmSymbols::object_object_object_signature(),
 324                           key_str,
 325                           value_str,
 326                           THREAD);
 327 }
 328 
 329 
 330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 331 
 332 
 333 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
 334   JVMWrapper("JVM_InitProperties");
 335   ResourceMark rm;
 336 
 337   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
 338 
 339   // System property list includes both user set via -D option and
 340   // jvm system specific properties.
 341   for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
 342     PUTPROP(props, p->key(), p->value());
 343   }
 344 
 345   // Convert the -XX:MaxDirectMemorySize= command line flag
 346   // to the sun.nio.MaxDirectMemorySize property.
 347   // Do this after setting user properties to prevent people
 348   // from setting the value with a -D option, as requested.
 349   {
 350     if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 351       PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
 352     } else {
 353       char as_chars[256];
 354       jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
 355       PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
 356     }
 357   }
 358 
 359   // JVM monitoring and management support
 360   // Add the sun.management.compiler property for the compiler's name
 361   {
 362 #undef CSIZE
 363 #if defined(_LP64) || defined(_WIN64)
 364   #define CSIZE "64-Bit "
 365 #else
 366   #define CSIZE
 367 #endif // 64bit
 368 
 369 #ifdef TIERED
 370     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 371 #else
 372 #if defined(COMPILER1)
 373     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 374 #elif defined(COMPILER2)
 375     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 376 #else
 377     const char* compiler_name = "";
 378 #endif // compilers
 379 #endif // TIERED
 380 
 381     if (*compiler_name != '\0' &&
 382         (Arguments::mode() != Arguments::_int)) {
 383       PUTPROP(props, "sun.management.compiler", compiler_name);
 384     }
 385   }
 386 
 387   return properties;
 388 JVM_END
 389 
 390 
 391 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 392 
 393 extern volatile jint vm_created;
 394 
 395 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
 396   if (vm_created != 0 && (code == 0)) {
 397     // The VM is about to exit. We call back into Java to check whether finalizers should be run
 398     Universe::run_finalizers_on_exit();
 399   }
 400   before_exit(thread);
 401   vm_exit(code);
 402 JVM_END
 403 
 404 
 405 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
 406   before_exit(thread);
 407   vm_exit(code);
 408 JVM_END
 409 
 410 
 411 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
 412   register_on_exit_function(func);
 413 JVM_END
 414 
 415 
 416 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
 417   JVMWrapper("JVM_GC");
 418   if (!DisableExplicitGC) {
 419     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 420   }
 421 JVM_END
 422 
 423 
 424 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
 425   JVMWrapper("JVM_MaxObjectInspectionAge");
 426   return Universe::heap()->millis_since_last_gc();
 427 JVM_END
 428 
 429 
 430 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
 431   if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
 432 JVM_END
 433 
 434 
 435 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
 436   if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
 437 JVM_END
 438 
 439 static inline jlong convert_size_t_to_jlong(size_t val) {
 440   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 441   NOT_LP64 (return (jlong)val;)
 442   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 443 }
 444 
 445 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
 446   JVMWrapper("JVM_TotalMemory");
 447   size_t n = Universe::heap()->capacity();
 448   return convert_size_t_to_jlong(n);
 449 JVM_END
 450 
 451 
 452 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
 453   JVMWrapper("JVM_FreeMemory");
 454   CollectedHeap* ch = Universe::heap();
 455   size_t n;
 456   {
 457      MutexLocker x(Heap_lock);
 458      n = ch->capacity() - ch->used();
 459   }
 460   return convert_size_t_to_jlong(n);
 461 JVM_END
 462 
 463 
 464 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
 465   JVMWrapper("JVM_MaxMemory");
 466   size_t n = Universe::heap()->max_capacity();
 467   return convert_size_t_to_jlong(n);
 468 JVM_END
 469 
 470 
 471 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
 472   JVMWrapper("JVM_ActiveProcessorCount");
 473   return os::active_processor_count();
 474 JVM_END
 475 
 476 
 477 
 478 // java.lang.Throwable //////////////////////////////////////////////////////
 479 
 480 
 481 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
 482   JVMWrapper("JVM_FillInStackTrace");
 483   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
 484   java_lang_Throwable::fill_in_stack_trace(exception);
 485 JVM_END
 486 
 487 
 488 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
 489   JVMWrapper("JVM_GetStackTraceDepth");
 490   oop exception = JNIHandles::resolve(throwable);
 491   return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
 492 JVM_END
 493 
 494 
 495 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
 496   JVMWrapper("JVM_GetStackTraceElement");
 497   JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
 498   oop exception = JNIHandles::resolve(throwable);
 499   oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
 500   return JNIHandles::make_local(env, element);
 501 JVM_END
 502 
 503 
 504 // java.lang.Object ///////////////////////////////////////////////
 505 
 506 
 507 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 508   JVMWrapper("JVM_IHashCode");
 509   // as implemented in the classic virtual machine; return 0 if object is NULL
 510   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 511 JVM_END
 512 
 513 
 514 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 515   JVMWrapper("JVM_MonitorWait");
 516   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 517   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 518   if (JvmtiExport::should_post_monitor_wait()) {
 519     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 520   }
 521   ObjectSynchronizer::wait(obj, ms, CHECK);
 522 JVM_END
 523 
 524 
 525 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 526   JVMWrapper("JVM_MonitorNotify");
 527   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 528   ObjectSynchronizer::notify(obj, CHECK);
 529 JVM_END
 530 
 531 
 532 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 533   JVMWrapper("JVM_MonitorNotifyAll");
 534   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 535   ObjectSynchronizer::notifyall(obj, CHECK);
 536 JVM_END
 537 
 538 
 539 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 540   JVMWrapper("JVM_Clone");
 541   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 542   const KlassHandle klass (THREAD, obj->klass());
 543   JvmtiVMObjectAllocEventCollector oam;
 544 
 545 #ifdef ASSERT
 546   // Just checking that the cloneable flag is set correct
 547   if (obj->is_array()) {
 548     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 549   } else {
 550     guarantee(obj->is_instance(), "should be instanceOop");
 551     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 552     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 553   }
 554 #endif
 555 
 556   // Check if class of obj supports the Cloneable interface.
 557   // All arrays are considered to be cloneable (See JLS 20.1.5)
 558   if (!klass->is_cloneable()) {
 559     ResourceMark rm(THREAD);
 560     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 561   }
 562 
 563   // Make shallow object copy
 564   const int size = obj->size();
 565   oop new_obj = NULL;
 566   if (obj->is_array()) {
 567     const int length = ((arrayOop)obj())->length();
 568     new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
 569   } else {
 570     new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
 571   }
 572   // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
 573   // is modifying a reference field in the clonee, a non-oop-atomic copy might
 574   // be suspended in the middle of copying the pointer and end up with parts
 575   // of two different pointers in the field.  Subsequent dereferences will crash.
 576   // 4846409: an oop-copy of objects with long or double fields or arrays of same
 577   // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
 578   // of oops.  We know objects are aligned on a minimum of an jlong boundary.
 579   // The same is true of StubRoutines::object_copy and the various oop_copy
 580   // variants, and of the code generated by the inline_native_clone intrinsic.
 581   assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
 582   Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
 583                                (size_t)align_object_size(size) / HeapWordsPerLong);
 584   // Clear the header
 585   new_obj->init_mark();
 586 
 587   // Store check (mark entire object and let gc sort it out)
 588   BarrierSet* bs = Universe::heap()->barrier_set();
 589   assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
 590   bs->write_region(MemRegion((HeapWord*)new_obj, size));
 591 
 592   // Caution: this involves a java upcall, so the clone should be
 593   // "gc-robust" by this stage.
 594   if (klass->has_finalizer()) {
 595     assert(obj->is_instance(), "should be instanceOop");
 596     new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
 597   }
 598 
 599   return JNIHandles::make_local(env, oop(new_obj));
 600 JVM_END
 601 
 602 // java.lang.Compiler ////////////////////////////////////////////////////
 603 
 604 // The initial cuts of the HotSpot VM will not support JITs, and all existing
 605 // JITs would need extensive changes to work with HotSpot.  The JIT-related JVM
 606 // functions are all silently ignored unless JVM warnings are printed.
 607 
 608 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
 609   if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
 610 JVM_END
 611 
 612 
 613 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
 614   if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
 615   return JNI_FALSE;
 616 JVM_END
 617 
 618 
 619 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
 620   if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
 621   return JNI_FALSE;
 622 JVM_END
 623 
 624 
 625 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
 626   if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
 627   return JNI_FALSE;
 628 JVM_END
 629 
 630 
 631 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
 632   if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
 633   return NULL;
 634 JVM_END
 635 
 636 
 637 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
 638   if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
 639 JVM_END
 640 
 641 
 642 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
 643   if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
 644 JVM_END
 645 
 646 
 647 
 648 // Error message support //////////////////////////////////////////////////////
 649 
 650 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
 651   JVMWrapper("JVM_GetLastErrorString");
 652   return (jint)os::lasterror(buf, len);
 653 JVM_END
 654 
 655 
 656 // java.io.File ///////////////////////////////////////////////////////////////
 657 
 658 JVM_LEAF(char*, JVM_NativePath(char* path))
 659   JVMWrapper2("JVM_NativePath (%s)", path);
 660   return os::native_path(path);
 661 JVM_END
 662 
 663 
 664 // Misc. class handling ///////////////////////////////////////////////////////////
 665 
 666 
 667 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
 668   JVMWrapper("JVM_GetCallerClass");
 669 
 670   // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation.
 671   if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) {
 672     Klass* k = thread->security_get_caller_class(depth);
 673     return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
 674   } else {
 675     // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass
 676     assert(depth == -1, "wrong handshake depth");
 677   }
 678 
 679   // Getting the class of the caller frame.
 680   //
 681   // The call stack at this point looks something like this:
 682   //
 683   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 684   // [1] [ @CallerSensitive API.method                                   ]
 685   // [.] [ (skipped intermediate frames)                                 ]
 686   // [n] [ caller                                                        ]
 687   vframeStream vfst(thread);
 688   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 689   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 690     Method* m = vfst.method();
 691     assert(m != NULL, "sanity");
 692     switch (n) {
 693     case 0:
 694       // This must only be called from Reflection.getCallerClass
 695       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 696         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 697       }
 698       // fall-through
 699     case 1:
 700       // Frame 0 and 1 must be caller sensitive.
 701       if (!m->caller_sensitive()) {
 702         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 703       }
 704       break;
 705     default:
 706       if (!m->is_ignored_by_security_stack_walk()) {
 707         // We have reached the desired frame; return the holder class.
 708         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 709       }
 710       break;
 711     }
 712   }
 713   return NULL;
 714 JVM_END
 715 
 716 
 717 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 718   JVMWrapper("JVM_FindPrimitiveClass");
 719   oop mirror = NULL;
 720   BasicType t = name2type(utf);
 721   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
 722     mirror = Universe::java_mirror(t);
 723   }
 724   if (mirror == NULL) {
 725     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 726   } else {
 727     return (jclass) JNIHandles::make_local(env, mirror);
 728   }
 729 JVM_END
 730 
 731 
 732 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
 733   JVMWrapper("JVM_ResolveClass");
 734   if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
 735 JVM_END
 736 
 737 
 738 // Returns a class loaded by the bootstrap class loader; or null
 739 // if not found.  ClassNotFoundException is not thrown.
 740 //
 741 // Rationale behind JVM_FindClassFromBootLoader
 742 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
 743 // b> because of (a) java.dll has a direct dependecy on the  unexported
 744 //    private symbol "_JVM_FindClassFromClassLoader@20".
 745 // c> the launcher cannot use the private symbol as it dynamically opens
 746 //    the entry point, so if something changes, the launcher will fail
 747 //    unexpectedly at runtime, it is safest for the launcher to dlopen a
 748 //    stable exported interface.
 749 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
 750 //    signature to change from _JVM_FindClassFromClassLoader@20 to
 751 //    JVM_FindClassFromClassLoader and will not be backward compatible
 752 //    with older JDKs.
 753 // Thus a public/stable exported entry point is the right solution,
 754 // public here means public in linker semantics, and is exported only
 755 // to the JDK, and is not intended to be a public API.
 756 
 757 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 758                                               const char* name))
 759   JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
 760 
 761   // Java libraries should ensure that name is never null...
 762   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 763     // It's impossible to create this class;  the name cannot fit
 764     // into the constant pool.
 765     return NULL;
 766   }
 767 
 768   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 769   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 770   if (k == NULL) {
 771     return NULL;
 772   }
 773 
 774   if (TraceClassResolution) {
 775     trace_class_resolution(k);
 776   }
 777   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 778 JVM_END
 779 
 780 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
 781                                                jboolean init, jobject loader,
 782                                                jboolean throwError))
 783   JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
 784                throwError ? "error" : "exception");
 785   // Java libraries should ensure that name is never null...
 786   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 787     // It's impossible to create this class;  the name cannot fit
 788     // into the constant pool.
 789     if (throwError) {
 790       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 791     } else {
 792       THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 793     }
 794   }
 795   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 796   Handle h_loader(THREAD, JNIHandles::resolve(loader));
 797   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 798                                                Handle(), throwError, THREAD);
 799 
 800   if (TraceClassResolution && result != NULL) {
 801     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 802   }
 803   return result;
 804 JVM_END
 805 
 806 
 807 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 808                                          jboolean init, jclass from))
 809   JVMWrapper2("JVM_FindClassFromClass %s", name);
 810   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 811     // It's impossible to create this class;  the name cannot fit
 812     // into the constant pool.
 813     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 814   }
 815   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 816   oop from_class_oop = JNIHandles::resolve(from);
 817   Klass* from_class = (from_class_oop == NULL)
 818                            ? (Klass*)NULL
 819                            : java_lang_Class::as_Klass(from_class_oop);
 820   oop class_loader = NULL;
 821   oop protection_domain = NULL;
 822   if (from_class != NULL) {
 823     class_loader = from_class->class_loader();
 824     protection_domain = from_class->protection_domain();
 825   }
 826   Handle h_loader(THREAD, class_loader);
 827   Handle h_prot  (THREAD, protection_domain);
 828   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 829                                                h_prot, true, thread);
 830 
 831   if (TraceClassResolution && result != NULL) {
 832     // this function is generally only used for class loading during verification.
 833     ResourceMark rm;
 834     oop from_mirror = JNIHandles::resolve_non_null(from);
 835     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 836     const char * from_name = from_class->external_name();
 837 
 838     oop mirror = JNIHandles::resolve_non_null(result);
 839     Klass* to_class = java_lang_Class::as_Klass(mirror);
 840     const char * to = to_class->external_name();
 841     tty->print("RESOLVE %s %s (verification)\n", from_name, to);
 842   }
 843 
 844   return result;
 845 JVM_END
 846 
 847 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 848   if (loader.is_null()) {
 849     return;
 850   }
 851 
 852   // check whether the current caller thread holds the lock or not.
 853   // If not, increment the corresponding counter
 854   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 855       ObjectSynchronizer::owner_self) {
 856     counter->inc();
 857   }
 858 }
 859 
 860 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 861 // and JVM_DefineClassWithSourceCond()
 862 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 863                                       jobject loader, const jbyte *buf,
 864                                       jsize len, jobject pd, const char *source,
 865                                       jboolean verify, TRAPS) {
 866   if (source == NULL)  source = "__JVM_DefineClass__";
 867 
 868   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 869   JavaThread* jt = (JavaThread*) THREAD;
 870 
 871   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 872                              ClassLoader::perf_define_appclass_selftime(),
 873                              ClassLoader::perf_define_appclasses(),
 874                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 875                              jt->get_thread_stat()->perf_timers_addr(),
 876                              PerfClassTraceTime::DEFINE_CLASS);
 877 
 878   if (UsePerfData) {
 879     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 880   }
 881 
 882   // Since exceptions can be thrown, class initialization can take place
 883   // if name is NULL no check for class name in .class stream has to be made.
 884   TempNewSymbol class_name = NULL;
 885   if (name != NULL) {
 886     const int str_len = (int)strlen(name);
 887     if (str_len > Symbol::max_length()) {
 888       // It's impossible to create this class;  the name cannot fit
 889       // into the constant pool.
 890       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 891     }
 892     class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
 893   }
 894 
 895   ResourceMark rm(THREAD);
 896   ClassFileStream st((u1*) buf, len, (char *)source);
 897   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 898   if (UsePerfData) {
 899     is_lock_held_by_thread(class_loader,
 900                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
 901                            THREAD);
 902   }
 903   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 904   Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
 905                                                      protection_domain, &st,
 906                                                      verify != 0,
 907                                                      CHECK_NULL);
 908 
 909   if (TraceClassResolution && k != NULL) {
 910     trace_class_resolution(k);
 911   }
 912 
 913   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 914 }
 915 
 916 
 917 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
 918   JVMWrapper2("JVM_DefineClass %s", name);
 919 
 920   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
 921 JVM_END
 922 
 923 
 924 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
 925   JVMWrapper2("JVM_DefineClassWithSource %s", name);
 926 
 927   return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
 928 JVM_END
 929 
 930 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
 931                                                 jobject loader, const jbyte *buf,
 932                                                 jsize len, jobject pd,
 933                                                 const char *source, jboolean verify))
 934   JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
 935 
 936   return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
 937 JVM_END
 938 
 939 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
 940   JVMWrapper("JVM_FindLoadedClass");
 941   ResourceMark rm(THREAD);
 942 
 943   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
 944   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
 945 
 946   const char* str   = java_lang_String::as_utf8_string(string());
 947   // Sanity check, don't expect null
 948   if (str == NULL) return NULL;
 949 
 950   const int str_len = (int)strlen(str);
 951   if (str_len > Symbol::max_length()) {
 952     // It's impossible to create this class;  the name cannot fit
 953     // into the constant pool.
 954     return NULL;
 955   }
 956   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
 957 
 958   // Security Note:
 959   //   The Java level wrapper will perform the necessary security check allowing
 960   //   us to pass the NULL as the initiating class loader.
 961   Handle h_loader(THREAD, JNIHandles::resolve(loader));
 962   if (UsePerfData) {
 963     is_lock_held_by_thread(h_loader,
 964                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
 965                            THREAD);
 966   }
 967 
 968   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
 969                                                               h_loader,
 970                                                               Handle(),
 971                                                               CHECK_NULL);
 972 
 973   return (k == NULL) ? NULL :
 974             (jclass) JNIHandles::make_local(env, k->java_mirror());
 975 JVM_END
 976 
 977 
 978 // Reflection support //////////////////////////////////////////////////////////////////////////////
 979 
 980 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
 981   assert (cls != NULL, "illegal class");
 982   JVMWrapper("JVM_GetClassName");
 983   JvmtiVMObjectAllocEventCollector oam;
 984   ResourceMark rm(THREAD);
 985   const char* name;
 986   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
 987     name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
 988   } else {
 989     // Consider caching interned string in Klass
 990     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
 991     assert(k->is_klass(), "just checking");
 992     name = k->external_name();
 993   }
 994   oop result = StringTable::intern((char*) name, CHECK_NULL);
 995   return (jstring) JNIHandles::make_local(env, result);
 996 JVM_END
 997 
 998 
 999 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1000   JVMWrapper("JVM_GetClassInterfaces");
1001   JvmtiVMObjectAllocEventCollector oam;
1002   oop mirror = JNIHandles::resolve_non_null(cls);
1003 
1004   // Special handling for primitive objects
1005   if (java_lang_Class::is_primitive(mirror)) {
1006     // Primitive objects does not have any interfaces
1007     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1008     return (jobjectArray) JNIHandles::make_local(env, r);
1009   }
1010 
1011   KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1012   // Figure size of result array
1013   int size;
1014   if (klass->oop_is_instance()) {
1015     size = InstanceKlass::cast(klass())->local_interfaces()->length();
1016   } else {
1017     assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1018     size = 2;
1019   }
1020 
1021   // Allocate result array
1022   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1023   objArrayHandle result (THREAD, r);
1024   // Fill in result
1025   if (klass->oop_is_instance()) {
1026     // Regular instance klass, fill in all local interfaces
1027     for (int index = 0; index < size; index++) {
1028       Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1029       result->obj_at_put(index, k->java_mirror());
1030     }
1031   } else {
1032     // All arrays implement java.lang.Cloneable and java.io.Serializable
1033     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1034     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1035   }
1036   return (jobjectArray) JNIHandles::make_local(env, result());
1037 JVM_END
1038 
1039 
1040 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1041   JVMWrapper("JVM_GetClassLoader");
1042   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1043     return NULL;
1044   }
1045   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1046   oop loader = k->class_loader();
1047   return JNIHandles::make_local(env, loader);
1048 JVM_END
1049 
1050 
1051 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1052   JVMWrapper("JVM_IsInterface");
1053   oop mirror = JNIHandles::resolve_non_null(cls);
1054   if (java_lang_Class::is_primitive(mirror)) {
1055     return JNI_FALSE;
1056   }
1057   Klass* k = java_lang_Class::as_Klass(mirror);
1058   jboolean result = k->is_interface();
1059   assert(!result || k->oop_is_instance(),
1060          "all interfaces are instance types");
1061   // The compiler intrinsic for isInterface tests the
1062   // Klass::_access_flags bits in the same way.
1063   return result;
1064 JVM_END
1065 
1066 
1067 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1068   JVMWrapper("JVM_GetClassSigners");
1069   JvmtiVMObjectAllocEventCollector oam;
1070   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1071     // There are no signers for primitive types
1072     return NULL;
1073   }
1074 
1075   objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1076 
1077   // If there are no signers set in the class, or if the class
1078   // is an array, return NULL.
1079   if (signers == NULL) return NULL;
1080 
1081   // copy of the signers array
1082   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1083   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1084   for (int index = 0; index < signers->length(); index++) {
1085     signers_copy->obj_at_put(index, signers->obj_at(index));
1086   }
1087 
1088   // return the copy
1089   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1090 JVM_END
1091 
1092 
1093 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1094   JVMWrapper("JVM_SetClassSigners");
1095   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1096     // This call is ignored for primitive types and arrays.
1097     // Signers are only set once, ClassLoader.java, and thus shouldn't
1098     // be called with an array.  Only the bootstrap loader creates arrays.
1099     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1100     if (k->oop_is_instance()) {
1101       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1102     }
1103   }
1104 JVM_END
1105 
1106 
1107 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1108   JVMWrapper("JVM_GetProtectionDomain");
1109   if (JNIHandles::resolve(cls) == NULL) {
1110     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1111   }
1112 
1113   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1114     // Primitive types does not have a protection domain.
1115     return NULL;
1116   }
1117 
1118   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1119   return (jobject) JNIHandles::make_local(env, pd);
1120 JVM_END
1121 
1122 
1123 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1124 // still defined in core libraries as of 1.5.
1125 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1126   JVMWrapper("JVM_SetProtectionDomain");
1127   if (JNIHandles::resolve(cls) == NULL) {
1128     THROW(vmSymbols::java_lang_NullPointerException());
1129   }
1130   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1131     // Call is ignored for primitive types
1132     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1133 
1134     // cls won't be an array, as this called only from ClassLoader.defineClass
1135     if (k->oop_is_instance()) {
1136       oop pd = JNIHandles::resolve(protection_domain);
1137       assert(pd == NULL || pd->is_oop(), "just checking");
1138       java_lang_Class::set_protection_domain(k->java_mirror(), pd);
1139     }
1140   }
1141 JVM_END
1142 
1143 
1144 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1145   JVMWrapper("JVM_DoPrivileged");
1146 
1147   if (action == NULL) {
1148     THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1149   }
1150 
1151   // Stack allocated list of privileged stack elements
1152   PrivilegedElement pi;
1153 
1154   // Check that action object understands "Object run()"
1155   Handle object (THREAD, JNIHandles::resolve(action));
1156 
1157   // get run() method
1158   Method* m_oop = object->klass()->uncached_lookup_method(
1159                                            vmSymbols::run_method_name(),
1160                                            vmSymbols::void_object_signature());
1161   methodHandle m (THREAD, m_oop);
1162   if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1163     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1164   }
1165 
1166   // Compute the frame initiating the do privileged operation and setup the privileged stack
1167   vframeStream vfst(thread);
1168   vfst.security_get_caller_frame(1);
1169 
1170   if (!vfst.at_end()) {
1171     pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1172     thread->set_privileged_stack_top(&pi);
1173   }
1174 
1175 
1176   // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1177   // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1178   Handle pending_exception;
1179   JavaValue result(T_OBJECT);
1180   JavaCallArguments args(object);
1181   JavaCalls::call(&result, m, &args, THREAD);
1182 
1183   // done with action, remove ourselves from the list
1184   if (!vfst.at_end()) {
1185     assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1186     thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1187   }
1188 
1189   if (HAS_PENDING_EXCEPTION) {
1190     pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1191     CLEAR_PENDING_EXCEPTION;
1192 
1193     if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1194         !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1195       // Throw a java.security.PrivilegedActionException(Exception e) exception
1196       JavaCallArguments args(pending_exception);
1197       THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1198                   vmSymbols::exception_void_signature(),
1199                   &args);
1200     }
1201   }
1202 
1203   if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1204   return JNIHandles::make_local(env, (oop) result.get_jobject());
1205 JVM_END
1206 
1207 
1208 // Returns the inherited_access_control_context field of the running thread.
1209 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1210   JVMWrapper("JVM_GetInheritedAccessControlContext");
1211   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1212   return JNIHandles::make_local(env, result);
1213 JVM_END
1214 
1215 class RegisterArrayForGC {
1216  private:
1217   JavaThread *_thread;
1218  public:
1219   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1220     _thread = thread;
1221     _thread->register_array_for_gc(array);
1222   }
1223 
1224   ~RegisterArrayForGC() {
1225     _thread->register_array_for_gc(NULL);
1226   }
1227 };
1228 
1229 
1230 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1231   JVMWrapper("JVM_GetStackAccessControlContext");
1232   if (!UsePrivilegedStack) return NULL;
1233 
1234   ResourceMark rm(THREAD);
1235   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1236   JvmtiVMObjectAllocEventCollector oam;
1237 
1238   // count the protection domains on the execution stack. We collapse
1239   // duplicate consecutive protection domains into a single one, as
1240   // well as stopping when we hit a privileged frame.
1241 
1242   // Use vframeStream to iterate through Java frames
1243   vframeStream vfst(thread);
1244 
1245   oop previous_protection_domain = NULL;
1246   Handle privileged_context(thread, NULL);
1247   bool is_privileged = false;
1248   oop protection_domain = NULL;
1249 
1250   for(; !vfst.at_end(); vfst.next()) {
1251     // get method of frame
1252     Method* method = vfst.method();
1253     intptr_t* frame_id   = vfst.frame_id();
1254 
1255     // check the privileged frames to see if we have a match
1256     if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1257       // this frame is privileged
1258       is_privileged = true;
1259       privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1260       protection_domain  = thread->privileged_stack_top()->protection_domain();
1261     } else {
1262       protection_domain = method->method_holder()->protection_domain();
1263     }
1264 
1265     if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1266       local_array->push(protection_domain);
1267       previous_protection_domain = protection_domain;
1268     }
1269 
1270     if (is_privileged) break;
1271   }
1272 
1273 
1274   // either all the domains on the stack were system domains, or
1275   // we had a privileged system domain
1276   if (local_array->is_empty()) {
1277     if (is_privileged && privileged_context.is_null()) return NULL;
1278 
1279     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1280     return JNIHandles::make_local(env, result);
1281   }
1282 
1283   // the resource area must be registered in case of a gc
1284   RegisterArrayForGC ragc(thread, local_array);
1285   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1286                                                  local_array->length(), CHECK_NULL);
1287   objArrayHandle h_context(thread, context);
1288   for (int index = 0; index < local_array->length(); index++) {
1289     h_context->obj_at_put(index, local_array->at(index));
1290   }
1291 
1292   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1293 
1294   return JNIHandles::make_local(env, result);
1295 JVM_END
1296 
1297 
1298 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1299   JVMWrapper("JVM_IsArrayClass");
1300   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1301   return (k != NULL) && k->oop_is_array() ? true : false;
1302 JVM_END
1303 
1304 
1305 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1306   JVMWrapper("JVM_IsPrimitiveClass");
1307   oop mirror = JNIHandles::resolve_non_null(cls);
1308   return (jboolean) java_lang_Class::is_primitive(mirror);
1309 JVM_END
1310 
1311 
1312 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1313   JVMWrapper("JVM_GetComponentType");
1314   oop mirror = JNIHandles::resolve_non_null(cls);
1315   oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1316   return (jclass) JNIHandles::make_local(env, result);
1317 JVM_END
1318 
1319 
1320 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1321   JVMWrapper("JVM_GetClassModifiers");
1322   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1323     // Primitive type
1324     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1325   }
1326 
1327   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1328   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1329   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1330   return k->modifier_flags();
1331 JVM_END
1332 
1333 
1334 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1335 
1336 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1337   JvmtiVMObjectAllocEventCollector oam;
1338   // ofClass is a reference to a java_lang_Class object. The mirror object
1339   // of an InstanceKlass
1340 
1341   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1342       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1343     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1344     return (jobjectArray)JNIHandles::make_local(env, result);
1345   }
1346 
1347   instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1348   InnerClassesIterator iter(k);
1349 
1350   if (iter.length() == 0) {
1351     // Neither an inner nor outer class
1352     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1353     return (jobjectArray)JNIHandles::make_local(env, result);
1354   }
1355 
1356   // find inner class info
1357   constantPoolHandle cp(thread, k->constants());
1358   int length = iter.length();
1359 
1360   // Allocate temp. result array
1361   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1362   objArrayHandle result (THREAD, r);
1363   int members = 0;
1364 
1365   for (; !iter.done(); iter.next()) {
1366     int ioff = iter.inner_class_info_index();
1367     int ooff = iter.outer_class_info_index();
1368 
1369     if (ioff != 0 && ooff != 0) {
1370       // Check to see if the name matches the class we're looking for
1371       // before attempting to find the class.
1372       if (cp->klass_name_at_matches(k, ooff)) {
1373         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1374         if (outer_klass == k()) {
1375            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1376            instanceKlassHandle inner_klass (THREAD, ik);
1377 
1378            // Throws an exception if outer klass has not declared k as
1379            // an inner klass
1380            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1381 
1382            result->obj_at_put(members, inner_klass->java_mirror());
1383            members++;
1384         }
1385       }
1386     }
1387   }
1388 
1389   if (members != length) {
1390     // Return array of right length
1391     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1392     for(int i = 0; i < members; i++) {
1393       res->obj_at_put(i, result->obj_at(i));
1394     }
1395     return (jobjectArray)JNIHandles::make_local(env, res);
1396   }
1397 
1398   return (jobjectArray)JNIHandles::make_local(env, result());
1399 JVM_END
1400 
1401 
1402 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1403 {
1404   // ofClass is a reference to a java_lang_Class object.
1405   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1406       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1407     return NULL;
1408   }
1409 
1410   bool inner_is_member = false;
1411   Klass* outer_klass
1412     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1413                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1414   if (outer_klass == NULL)  return NULL;  // already a top-level class
1415   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1416   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1417 }
1418 JVM_END
1419 
1420 // should be in InstanceKlass.cpp, but is here for historical reasons
1421 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1422                                                      bool* inner_is_member,
1423                                                      TRAPS) {
1424   Thread* thread = THREAD;
1425   InnerClassesIterator iter(k);
1426   if (iter.length() == 0) {
1427     // No inner class info => no declaring class
1428     return NULL;
1429   }
1430 
1431   constantPoolHandle i_cp(thread, k->constants());
1432 
1433   bool found = false;
1434   Klass* ok;
1435   instanceKlassHandle outer_klass;
1436   *inner_is_member = false;
1437 
1438   // Find inner_klass attribute
1439   for (; !iter.done() && !found; iter.next()) {
1440     int ioff = iter.inner_class_info_index();
1441     int ooff = iter.outer_class_info_index();
1442     int noff = iter.inner_name_index();
1443     if (ioff != 0) {
1444       // Check to see if the name matches the class we're looking for
1445       // before attempting to find the class.
1446       if (i_cp->klass_name_at_matches(k, ioff)) {
1447         Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1448         found = (k() == inner_klass);
1449         if (found && ooff != 0) {
1450           ok = i_cp->klass_at(ooff, CHECK_NULL);
1451           outer_klass = instanceKlassHandle(thread, ok);
1452           *inner_is_member = true;
1453         }
1454       }
1455     }
1456   }
1457 
1458   if (found && outer_klass.is_null()) {
1459     // It may be anonymous; try for that.
1460     int encl_method_class_idx = k->enclosing_method_class_index();
1461     if (encl_method_class_idx != 0) {
1462       ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1463       outer_klass = instanceKlassHandle(thread, ok);
1464       *inner_is_member = false;
1465     }
1466   }
1467 
1468   // If no inner class attribute found for this class.
1469   if (outer_klass.is_null())  return NULL;
1470 
1471   // Throws an exception if outer klass has not declared k as an inner klass
1472   // We need evidence that each klass knows about the other, or else
1473   // the system could allow a spoof of an inner class to gain access rights.
1474   Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1475   return outer_klass();
1476 }
1477 
1478 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1479   assert (cls != NULL, "illegal class");
1480   JVMWrapper("JVM_GetClassSignature");
1481   JvmtiVMObjectAllocEventCollector oam;
1482   ResourceMark rm(THREAD);
1483   // Return null for arrays and primatives
1484   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1485     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1486     if (k->oop_is_instance()) {
1487       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1488       if (sym == NULL) return NULL;
1489       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1490       return (jstring) JNIHandles::make_local(env, str());
1491     }
1492   }
1493   return NULL;
1494 JVM_END
1495 
1496 
1497 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1498   assert (cls != NULL, "illegal class");
1499   JVMWrapper("JVM_GetClassAnnotations");
1500 
1501   // Return null for arrays and primitives
1502   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1503     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1504     if (k->oop_is_instance()) {
1505       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1506       return (jbyteArray) JNIHandles::make_local(env, a);
1507     }
1508   }
1509   return NULL;
1510 JVM_END
1511 
1512 
1513 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1514   // some of this code was adapted from from jni_FromReflectedField
1515 
1516   oop reflected = JNIHandles::resolve_non_null(field);
1517   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1518   Klass* k    = java_lang_Class::as_Klass(mirror);
1519   int slot      = java_lang_reflect_Field::slot(reflected);
1520   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1521 
1522   KlassHandle kh(THREAD, k);
1523   intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1524 
1525   if (modifiers & JVM_ACC_STATIC) {
1526     // for static fields we only look in the current class
1527     if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1528       assert(false, "cannot find static field");
1529       return false;
1530     }
1531   } else {
1532     // for instance fields we start with the current class and work
1533     // our way up through the superclass chain
1534     if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1535       assert(false, "cannot find instance field");
1536       return false;
1537     }
1538   }
1539   return true;
1540 }
1541 
1542 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1543   // field is a handle to a java.lang.reflect.Field object
1544   assert(field != NULL, "illegal field");
1545   JVMWrapper("JVM_GetFieldAnnotations");
1546 
1547   fieldDescriptor fd;
1548   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1549   if (!gotFd) {
1550     return NULL;
1551   }
1552 
1553   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1554 JVM_END
1555 
1556 
1557 static Method* jvm_get_method_common(jobject method) {
1558   // some of this code was adapted from from jni_FromReflectedMethod
1559 
1560   oop reflected = JNIHandles::resolve_non_null(method);
1561   oop mirror    = NULL;
1562   int slot      = 0;
1563 
1564   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1565     mirror = java_lang_reflect_Constructor::clazz(reflected);
1566     slot   = java_lang_reflect_Constructor::slot(reflected);
1567   } else {
1568     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1569            "wrong type");
1570     mirror = java_lang_reflect_Method::clazz(reflected);
1571     slot   = java_lang_reflect_Method::slot(reflected);
1572   }
1573   Klass* k = java_lang_Class::as_Klass(mirror);
1574 
1575   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1576   assert(m != NULL, "cannot find method");
1577   return m;  // caller has to deal with NULL in product mode
1578 }
1579 
1580 
1581 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1582   JVMWrapper("JVM_GetMethodAnnotations");
1583 
1584   // method is a handle to a java.lang.reflect.Method object
1585   Method* m = jvm_get_method_common(method);
1586   if (m == NULL) {
1587     return NULL;
1588   }
1589 
1590   return (jbyteArray) JNIHandles::make_local(env,
1591     Annotations::make_java_array(m->annotations(), THREAD));
1592 JVM_END
1593 
1594 
1595 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1596   JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1597 
1598   // method is a handle to a java.lang.reflect.Method object
1599   Method* m = jvm_get_method_common(method);
1600   if (m == NULL) {
1601     return NULL;
1602   }
1603 
1604   return (jbyteArray) JNIHandles::make_local(env,
1605     Annotations::make_java_array(m->annotation_default(), THREAD));
1606 JVM_END
1607 
1608 
1609 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1610   JVMWrapper("JVM_GetMethodParameterAnnotations");
1611 
1612   // method is a handle to a java.lang.reflect.Method object
1613   Method* m = jvm_get_method_common(method);
1614   if (m == NULL) {
1615     return NULL;
1616   }
1617 
1618   return (jbyteArray) JNIHandles::make_local(env,
1619     Annotations::make_java_array(m->parameter_annotations(), THREAD));
1620 JVM_END
1621 
1622 /* Type use annotations support (JDK 1.8) */
1623 
1624 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1625   assert (cls != NULL, "illegal class");
1626   JVMWrapper("JVM_GetClassTypeAnnotations");
1627   ResourceMark rm(THREAD);
1628   // Return null for arrays and primitives
1629   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1630     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1631     if (k->oop_is_instance()) {
1632       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1633       if (type_annotations != NULL) {
1634         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1635         return (jbyteArray) JNIHandles::make_local(env, a);
1636       }
1637     }
1638   }
1639   return NULL;
1640 JVM_END
1641 
1642 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1643   assert (method != NULL, "illegal method");
1644   JVMWrapper("JVM_GetMethodTypeAnnotations");
1645 
1646   // method is a handle to a java.lang.reflect.Method object
1647   Method* m = jvm_get_method_common(method);
1648   if (m == NULL) {
1649     return NULL;
1650   }
1651 
1652   AnnotationArray* type_annotations = m->type_annotations();
1653   if (type_annotations != NULL) {
1654     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1655     return (jbyteArray) JNIHandles::make_local(env, a);
1656   }
1657 
1658   return NULL;
1659 JVM_END
1660 
1661 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1662   assert (field != NULL, "illegal field");
1663   JVMWrapper("JVM_GetFieldTypeAnnotations");
1664 
1665   fieldDescriptor fd;
1666   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1667   if (!gotFd) {
1668     return NULL;
1669   }
1670 
1671   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1672 JVM_END
1673 
1674 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1675   if (!cp->is_within_bounds(index)) {
1676     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1677   }
1678 }
1679 
1680 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1681 {
1682   JVMWrapper("JVM_GetMethodParameters");
1683   // method is a handle to a java.lang.reflect.Method object
1684   Method* method_ptr = jvm_get_method_common(method);
1685   methodHandle mh (THREAD, method_ptr);
1686   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1687   const int num_params = mh->method_parameters_length();
1688 
1689   if (0 != num_params) {
1690     // make sure all the symbols are properly formatted
1691     for (int i = 0; i < num_params; i++) {
1692       MethodParametersElement* params = mh->method_parameters_start();
1693       int index = params[i].name_cp_index;
1694       bounds_check(mh->constants(), index, CHECK_NULL);
1695 
1696       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1697         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1698                     "Wrong type at constant pool index");
1699       }
1700 
1701     }
1702 
1703     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1704     objArrayHandle result (THREAD, result_oop);
1705 
1706     for (int i = 0; i < num_params; i++) {
1707       MethodParametersElement* params = mh->method_parameters_start();
1708       // For a 0 index, give a NULL symbol
1709       Symbol* sym = 0 != params[i].name_cp_index ?
1710         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1711       int flags = params[i].flags;
1712       oop param = Reflection::new_parameter(reflected_method, i, sym,
1713                                             flags, CHECK_NULL);
1714       result->obj_at_put(i, param);
1715     }
1716     return (jobjectArray)JNIHandles::make_local(env, result());
1717   } else {
1718     return (jobjectArray)NULL;
1719   }
1720 }
1721 JVM_END
1722 
1723 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1724 
1725 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1726 {
1727   JVMWrapper("JVM_GetClassDeclaredFields");
1728   JvmtiVMObjectAllocEventCollector oam;
1729 
1730   // Exclude primitive types and array types
1731   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1732       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1733     // Return empty array
1734     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1735     return (jobjectArray) JNIHandles::make_local(env, res);
1736   }
1737 
1738   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1739   constantPoolHandle cp(THREAD, k->constants());
1740 
1741   // Ensure class is linked
1742   k->link_class(CHECK_NULL);
1743 
1744   // 4496456 We need to filter out java.lang.Throwable.backtrace
1745   bool skip_backtrace = false;
1746 
1747   // Allocate result
1748   int num_fields;
1749 
1750   if (publicOnly) {
1751     num_fields = 0;
1752     for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1753       if (fs.access_flags().is_public()) ++num_fields;
1754     }
1755   } else {
1756     num_fields = k->java_fields_count();
1757 
1758     if (k() == SystemDictionary::Throwable_klass()) {
1759       num_fields--;
1760       skip_backtrace = true;
1761     }
1762   }
1763 
1764   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1765   objArrayHandle result (THREAD, r);
1766 
1767   int out_idx = 0;
1768   fieldDescriptor fd;
1769   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1770     if (skip_backtrace) {
1771       // 4496456 skip java.lang.Throwable.backtrace
1772       int offset = fs.offset();
1773       if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1774     }
1775 
1776     if (!publicOnly || fs.access_flags().is_public()) {
1777       fd.initialize(k(), fs.index());
1778       oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1779       result->obj_at_put(out_idx, field);
1780       ++out_idx;
1781     }
1782   }
1783   assert(out_idx == num_fields, "just checking");
1784   return (jobjectArray) JNIHandles::make_local(env, result());
1785 }
1786 JVM_END
1787 
1788 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1789 {
1790   JVMWrapper("JVM_GetClassDeclaredMethods");
1791   JvmtiVMObjectAllocEventCollector oam;
1792 
1793   // Exclude primitive types and array types
1794   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1795       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1796     // Return empty array
1797     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1798     return (jobjectArray) JNIHandles::make_local(env, res);
1799   }
1800 
1801   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1802 
1803   // Ensure class is linked
1804   k->link_class(CHECK_NULL);
1805 
1806   Array<Method*>* methods = k->methods();
1807   int methods_length = methods->length();
1808   int num_methods = 0;
1809 
1810   int i;
1811   for (i = 0; i < methods_length; i++) {
1812     methodHandle method(THREAD, methods->at(i));
1813     if (!method->is_initializer() && !method->is_overpass()) {
1814       if (!publicOnly || method->is_public()) {
1815         ++num_methods;
1816       }
1817     }
1818   }
1819 
1820   // Allocate result
1821   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1822   objArrayHandle result (THREAD, r);
1823 
1824   int out_idx = 0;
1825   for (i = 0; i < methods_length; i++) {
1826     methodHandle method(THREAD, methods->at(i));
1827     if (!method->is_initializer() && !method->is_overpass()) {
1828       if (!publicOnly || method->is_public()) {
1829         oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1830         result->obj_at_put(out_idx, m);
1831         ++out_idx;
1832       }
1833     }
1834   }
1835   assert(out_idx == num_methods, "just checking");
1836   return (jobjectArray) JNIHandles::make_local(env, result());
1837 }
1838 JVM_END
1839 
1840 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1841 {
1842   JVMWrapper("JVM_GetClassDeclaredConstructors");
1843   JvmtiVMObjectAllocEventCollector oam;
1844 
1845   // Exclude primitive types and array types
1846   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1847       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1848     // Return empty array
1849     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1850     return (jobjectArray) JNIHandles::make_local(env, res);
1851   }
1852 
1853   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1854 
1855   // Ensure class is linked
1856   k->link_class(CHECK_NULL);
1857 
1858   Array<Method*>* methods = k->methods();
1859   int methods_length = methods->length();
1860   int num_constructors = 0;
1861 
1862   int i;
1863   for (i = 0; i < methods_length; i++) {
1864     methodHandle method(THREAD, methods->at(i));
1865     if (method->is_initializer() && !method->is_static()) {
1866       if (!publicOnly || method->is_public()) {
1867         ++num_constructors;
1868       }
1869     }
1870   }
1871 
1872   // Allocate result
1873   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1874   objArrayHandle result(THREAD, r);
1875 
1876   int out_idx = 0;
1877   for (i = 0; i < methods_length; i++) {
1878     methodHandle method(THREAD, methods->at(i));
1879     if (method->is_initializer() && !method->is_static()) {
1880       if (!publicOnly || method->is_public()) {
1881         oop m = Reflection::new_constructor(method, CHECK_NULL);
1882         result->obj_at_put(out_idx, m);
1883         ++out_idx;
1884       }
1885     }
1886   }
1887   assert(out_idx == num_constructors, "just checking");
1888   return (jobjectArray) JNIHandles::make_local(env, result());
1889 }
1890 JVM_END
1891 
1892 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1893 {
1894   JVMWrapper("JVM_GetClassAccessFlags");
1895   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1896     // Primitive type
1897     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1898   }
1899 
1900   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1901   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1902 }
1903 JVM_END
1904 
1905 
1906 // Constant pool access //////////////////////////////////////////////////////////
1907 
1908 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1909 {
1910   JVMWrapper("JVM_GetClassConstantPool");
1911   JvmtiVMObjectAllocEventCollector oam;
1912 
1913   // Return null for primitives and arrays
1914   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1915     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1916     if (k->oop_is_instance()) {
1917       instanceKlassHandle k_h(THREAD, k);
1918       Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1919       sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1920       return JNIHandles::make_local(jcp());
1921     }
1922   }
1923   return NULL;
1924 }
1925 JVM_END
1926 
1927 
1928 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1929 {
1930   JVMWrapper("JVM_ConstantPoolGetSize");
1931   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1932   return cp->length();
1933 }
1934 JVM_END
1935 
1936 
1937 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1938 {
1939   JVMWrapper("JVM_ConstantPoolGetClassAt");
1940   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1941   bounds_check(cp, index, CHECK_NULL);
1942   constantTag tag = cp->tag_at(index);
1943   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1944     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1945   }
1946   Klass* k = cp->klass_at(index, CHECK_NULL);
1947   return (jclass) JNIHandles::make_local(k->java_mirror());
1948 }
1949 JVM_END
1950 
1951 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1952 {
1953   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1954   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1955   bounds_check(cp, index, CHECK_NULL);
1956   constantTag tag = cp->tag_at(index);
1957   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1958     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1959   }
1960   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1961   if (k == NULL) return NULL;
1962   return (jclass) JNIHandles::make_local(k->java_mirror());
1963 }
1964 JVM_END
1965 
1966 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1967   constantTag tag = cp->tag_at(index);
1968   if (!tag.is_method() && !tag.is_interface_method()) {
1969     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1970   }
1971   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1972   Klass* k_o;
1973   if (force_resolution) {
1974     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1975   } else {
1976     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1977     if (k_o == NULL) return NULL;
1978   }
1979   instanceKlassHandle k(THREAD, k_o);
1980   Symbol* name = cp->uncached_name_ref_at(index);
1981   Symbol* sig  = cp->uncached_signature_ref_at(index);
1982   methodHandle m (THREAD, k->find_method(name, sig));
1983   if (m.is_null()) {
1984     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1985   }
1986   oop method;
1987   if (!m->is_initializer() || m->is_static()) {
1988     method = Reflection::new_method(m, true, true, CHECK_NULL);
1989   } else {
1990     method = Reflection::new_constructor(m, CHECK_NULL);
1991   }
1992   return JNIHandles::make_local(method);
1993 }
1994 
1995 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1996 {
1997   JVMWrapper("JVM_ConstantPoolGetMethodAt");
1998   JvmtiVMObjectAllocEventCollector oam;
1999   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2000   bounds_check(cp, index, CHECK_NULL);
2001   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2002   return res;
2003 }
2004 JVM_END
2005 
2006 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2007 {
2008   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2009   JvmtiVMObjectAllocEventCollector oam;
2010   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2011   bounds_check(cp, index, CHECK_NULL);
2012   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2013   return res;
2014 }
2015 JVM_END
2016 
2017 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2018   constantTag tag = cp->tag_at(index);
2019   if (!tag.is_field()) {
2020     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2021   }
2022   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2023   Klass* k_o;
2024   if (force_resolution) {
2025     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2026   } else {
2027     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2028     if (k_o == NULL) return NULL;
2029   }
2030   instanceKlassHandle k(THREAD, k_o);
2031   Symbol* name = cp->uncached_name_ref_at(index);
2032   Symbol* sig  = cp->uncached_signature_ref_at(index);
2033   fieldDescriptor fd;
2034   Klass* target_klass = k->find_field(name, sig, &fd);
2035   if (target_klass == NULL) {
2036     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2037   }
2038   oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2039   return JNIHandles::make_local(field);
2040 }
2041 
2042 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2043 {
2044   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2045   JvmtiVMObjectAllocEventCollector oam;
2046   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2047   bounds_check(cp, index, CHECK_NULL);
2048   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2049   return res;
2050 }
2051 JVM_END
2052 
2053 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2054 {
2055   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2056   JvmtiVMObjectAllocEventCollector oam;
2057   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2058   bounds_check(cp, index, CHECK_NULL);
2059   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2060   return res;
2061 }
2062 JVM_END
2063 
2064 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2065 {
2066   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2067   JvmtiVMObjectAllocEventCollector oam;
2068   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2069   bounds_check(cp, index, CHECK_NULL);
2070   constantTag tag = cp->tag_at(index);
2071   if (!tag.is_field_or_method()) {
2072     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2073   }
2074   int klass_ref = cp->uncached_klass_ref_index_at(index);
2075   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2076   Symbol*  member_name = cp->uncached_name_ref_at(index);
2077   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2078   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2079   objArrayHandle dest(THREAD, dest_o);
2080   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2081   dest->obj_at_put(0, str());
2082   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2083   dest->obj_at_put(1, str());
2084   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2085   dest->obj_at_put(2, str());
2086   return (jobjectArray) JNIHandles::make_local(dest());
2087 }
2088 JVM_END
2089 
2090 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2091 {
2092   JVMWrapper("JVM_ConstantPoolGetIntAt");
2093   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2094   bounds_check(cp, index, CHECK_0);
2095   constantTag tag = cp->tag_at(index);
2096   if (!tag.is_int()) {
2097     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2098   }
2099   return cp->int_at(index);
2100 }
2101 JVM_END
2102 
2103 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2104 {
2105   JVMWrapper("JVM_ConstantPoolGetLongAt");
2106   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2107   bounds_check(cp, index, CHECK_(0L));
2108   constantTag tag = cp->tag_at(index);
2109   if (!tag.is_long()) {
2110     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2111   }
2112   return cp->long_at(index);
2113 }
2114 JVM_END
2115 
2116 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2117 {
2118   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2119   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2120   bounds_check(cp, index, CHECK_(0.0f));
2121   constantTag tag = cp->tag_at(index);
2122   if (!tag.is_float()) {
2123     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2124   }
2125   return cp->float_at(index);
2126 }
2127 JVM_END
2128 
2129 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2130 {
2131   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2132   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2133   bounds_check(cp, index, CHECK_(0.0));
2134   constantTag tag = cp->tag_at(index);
2135   if (!tag.is_double()) {
2136     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2137   }
2138   return cp->double_at(index);
2139 }
2140 JVM_END
2141 
2142 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2143 {
2144   JVMWrapper("JVM_ConstantPoolGetStringAt");
2145   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2146   bounds_check(cp, index, CHECK_NULL);
2147   constantTag tag = cp->tag_at(index);
2148   if (!tag.is_string()) {
2149     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2150   }
2151   oop str = cp->string_at(index, CHECK_NULL);
2152   return (jstring) JNIHandles::make_local(str);
2153 }
2154 JVM_END
2155 
2156 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2157 {
2158   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2159   JvmtiVMObjectAllocEventCollector oam;
2160   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2161   bounds_check(cp, index, CHECK_NULL);
2162   constantTag tag = cp->tag_at(index);
2163   if (!tag.is_symbol()) {
2164     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2165   }
2166   Symbol* sym = cp->symbol_at(index);
2167   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2168   return (jstring) JNIHandles::make_local(str());
2169 }
2170 JVM_END
2171 
2172 
2173 // Assertion support. //////////////////////////////////////////////////////////
2174 
2175 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2176   JVMWrapper("JVM_DesiredAssertionStatus");
2177   assert(cls != NULL, "bad class");
2178 
2179   oop r = JNIHandles::resolve(cls);
2180   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2181   if (java_lang_Class::is_primitive(r)) return false;
2182 
2183   Klass* k = java_lang_Class::as_Klass(r);
2184   assert(k->oop_is_instance(), "must be an instance klass");
2185   if (! k->oop_is_instance()) return false;
2186 
2187   ResourceMark rm(THREAD);
2188   const char* name = k->name()->as_C_string();
2189   bool system_class = k->class_loader() == NULL;
2190   return JavaAssertions::enabled(name, system_class);
2191 
2192 JVM_END
2193 
2194 
2195 // Return a new AssertionStatusDirectives object with the fields filled in with
2196 // command-line assertion arguments (i.e., -ea, -da).
2197 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2198   JVMWrapper("JVM_AssertionStatusDirectives");
2199   JvmtiVMObjectAllocEventCollector oam;
2200   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2201   return JNIHandles::make_local(env, asd);
2202 JVM_END
2203 
2204 // Verification ////////////////////////////////////////////////////////////////////////////////
2205 
2206 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2207 
2208 // RedefineClasses support: bug 6214132 caused verification to fail.
2209 // All functions from this section should call the jvmtiThreadSate function:
2210 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2211 // The function returns a Klass* of the _scratch_class if the verifier
2212 // was invoked in the middle of the class redefinition.
2213 // Otherwise it returns its argument value which is the _the_class Klass*.
2214 // Please, refer to the description in the jvmtiThreadSate.hpp.
2215 
2216 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2217   JVMWrapper("JVM_GetClassNameUTF");
2218   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2219   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2220   return k->name()->as_utf8();
2221 JVM_END
2222 
2223 
2224 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2225   JVMWrapper("JVM_GetClassCPTypes");
2226   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2227   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2228   // types will have length zero if this is not an InstanceKlass
2229   // (length is determined by call to JVM_GetClassCPEntriesCount)
2230   if (k->oop_is_instance()) {
2231     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2232     for (int index = cp->length() - 1; index >= 0; index--) {
2233       constantTag tag = cp->tag_at(index);
2234       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2235   }
2236   }
2237 JVM_END
2238 
2239 
2240 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2241   JVMWrapper("JVM_GetClassCPEntriesCount");
2242   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2243   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2244   if (!k->oop_is_instance())
2245     return 0;
2246   return InstanceKlass::cast(k)->constants()->length();
2247 JVM_END
2248 
2249 
2250 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2251   JVMWrapper("JVM_GetClassFieldsCount");
2252   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2253   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2254   if (!k->oop_is_instance())
2255     return 0;
2256   return InstanceKlass::cast(k)->java_fields_count();
2257 JVM_END
2258 
2259 
2260 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2261   JVMWrapper("JVM_GetClassMethodsCount");
2262   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2263   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2264   if (!k->oop_is_instance())
2265     return 0;
2266   return InstanceKlass::cast(k)->methods()->length();
2267 JVM_END
2268 
2269 
2270 // The following methods, used for the verifier, are never called with
2271 // array klasses, so a direct cast to InstanceKlass is safe.
2272 // Typically, these methods are called in a loop with bounds determined
2273 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2274 // zero for arrays.
2275 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2276   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2277   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2278   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2279   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2280   int length = method->checked_exceptions_length();
2281   if (length > 0) {
2282     CheckedExceptionElement* table= method->checked_exceptions_start();
2283     for (int i = 0; i < length; i++) {
2284       exceptions[i] = table[i].class_cp_index;
2285     }
2286   }
2287 JVM_END
2288 
2289 
2290 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2291   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2292   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2293   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2294   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2295   return method->checked_exceptions_length();
2296 JVM_END
2297 
2298 
2299 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2300   JVMWrapper("JVM_GetMethodIxByteCode");
2301   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2302   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2303   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2304   memcpy(code, method->code_base(), method->code_size());
2305 JVM_END
2306 
2307 
2308 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2309   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2310   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2311   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2312   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2313   return method->code_size();
2314 JVM_END
2315 
2316 
2317 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2318   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2319   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2320   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2321   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2322   ExceptionTable extable(method);
2323   entry->start_pc   = extable.start_pc(entry_index);
2324   entry->end_pc     = extable.end_pc(entry_index);
2325   entry->handler_pc = extable.handler_pc(entry_index);
2326   entry->catchType  = extable.catch_type_index(entry_index);
2327 JVM_END
2328 
2329 
2330 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2331   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2332   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2333   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2334   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2335   return method->exception_table_length();
2336 JVM_END
2337 
2338 
2339 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2340   JVMWrapper("JVM_GetMethodIxModifiers");
2341   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2342   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2343   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2344   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2345 JVM_END
2346 
2347 
2348 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2349   JVMWrapper("JVM_GetFieldIxModifiers");
2350   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2353 JVM_END
2354 
2355 
2356 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2357   JVMWrapper("JVM_GetMethodIxLocalsCount");
2358   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2359   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2360   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2361   return method->max_locals();
2362 JVM_END
2363 
2364 
2365 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2366   JVMWrapper("JVM_GetMethodIxArgsSize");
2367   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2368   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2369   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2370   return method->size_of_parameters();
2371 JVM_END
2372 
2373 
2374 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2375   JVMWrapper("JVM_GetMethodIxMaxStack");
2376   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379   return method->verifier_max_stack();
2380 JVM_END
2381 
2382 
2383 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2384   JVMWrapper("JVM_IsConstructorIx");
2385   ResourceMark rm(THREAD);
2386   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2387   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2388   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2389   return method->name() == vmSymbols::object_initializer_name();
2390 JVM_END
2391 
2392 
2393 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2394   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2395   ResourceMark rm(THREAD);
2396   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399   return method->is_overpass();
2400 JVM_END
2401 
2402 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2403   JVMWrapper("JVM_GetMethodIxIxUTF");
2404   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2405   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2406   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2407   return method->name()->as_utf8();
2408 JVM_END
2409 
2410 
2411 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2412   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2413   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2414   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2415   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2416   return method->signature()->as_utf8();
2417 JVM_END
2418 
2419 /**
2420  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2421  * read entries in the constant pool.  Since the old verifier always
2422  * works on a copy of the code, it will not see any rewriting that
2423  * may possibly occur in the middle of verification.  So it is important
2424  * that nothing it calls tries to use the cpCache instead of the raw
2425  * constant pool, so we must use cp->uncached_x methods when appropriate.
2426  */
2427 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2428   JVMWrapper("JVM_GetCPFieldNameUTF");
2429   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2430   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2431   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2432   switch (cp->tag_at(cp_index).value()) {
2433     case JVM_CONSTANT_Fieldref:
2434       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2435     default:
2436       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2437   }
2438   ShouldNotReachHere();
2439   return NULL;
2440 JVM_END
2441 
2442 
2443 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2444   JVMWrapper("JVM_GetCPMethodNameUTF");
2445   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2446   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2447   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2448   switch (cp->tag_at(cp_index).value()) {
2449     case JVM_CONSTANT_InterfaceMethodref:
2450     case JVM_CONSTANT_Methodref:
2451     case JVM_CONSTANT_NameAndType:  // for invokedynamic
2452       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2453     default:
2454       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2455   }
2456   ShouldNotReachHere();
2457   return NULL;
2458 JVM_END
2459 
2460 
2461 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2462   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2463   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2464   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2465   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2466   switch (cp->tag_at(cp_index).value()) {
2467     case JVM_CONSTANT_InterfaceMethodref:
2468     case JVM_CONSTANT_Methodref:
2469     case JVM_CONSTANT_NameAndType:  // for invokedynamic
2470       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2471     default:
2472       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2473   }
2474   ShouldNotReachHere();
2475   return NULL;
2476 JVM_END
2477 
2478 
2479 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2480   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2481   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2482   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2483   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2484   switch (cp->tag_at(cp_index).value()) {
2485     case JVM_CONSTANT_Fieldref:
2486       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2487     default:
2488       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2489   }
2490   ShouldNotReachHere();
2491   return NULL;
2492 JVM_END
2493 
2494 
2495 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2496   JVMWrapper("JVM_GetCPClassNameUTF");
2497   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2498   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2499   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2500   Symbol* classname = cp->klass_name_at(cp_index);
2501   return classname->as_utf8();
2502 JVM_END
2503 
2504 
2505 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2506   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2507   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2508   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2509   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2510   switch (cp->tag_at(cp_index).value()) {
2511     case JVM_CONSTANT_Fieldref: {
2512       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2513       Symbol* classname = cp->klass_name_at(class_index);
2514       return classname->as_utf8();
2515     }
2516     default:
2517       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2518   }
2519   ShouldNotReachHere();
2520   return NULL;
2521 JVM_END
2522 
2523 
2524 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2525   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2526   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2527   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2528   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2529   switch (cp->tag_at(cp_index).value()) {
2530     case JVM_CONSTANT_Methodref:
2531     case JVM_CONSTANT_InterfaceMethodref: {
2532       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2533       Symbol* classname = cp->klass_name_at(class_index);
2534       return classname->as_utf8();
2535     }
2536     default:
2537       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2538   }
2539   ShouldNotReachHere();
2540   return NULL;
2541 JVM_END
2542 
2543 
2544 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2545   JVMWrapper("JVM_GetCPFieldModifiers");
2546   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2547   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2548   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2549   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2550   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2551   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2552   switch (cp->tag_at(cp_index).value()) {
2553     case JVM_CONSTANT_Fieldref: {
2554       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2555       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2556       for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2557         if (fs.name() == name && fs.signature() == signature) {
2558           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2559         }
2560       }
2561       return -1;
2562     }
2563     default:
2564       fatal("JVM_GetCPFieldModifiers: illegal constant");
2565   }
2566   ShouldNotReachHere();
2567   return 0;
2568 JVM_END
2569 
2570 
2571 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2572   JVMWrapper("JVM_GetCPMethodModifiers");
2573   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2574   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2575   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2577   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578   switch (cp->tag_at(cp_index).value()) {
2579     case JVM_CONSTANT_Methodref:
2580     case JVM_CONSTANT_InterfaceMethodref: {
2581       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2582       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2583       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2584       int methods_count = methods->length();
2585       for (int i = 0; i < methods_count; i++) {
2586         Method* method = methods->at(i);
2587         if (method->name() == name && method->signature() == signature) {
2588             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2589         }
2590       }
2591       return -1;
2592     }
2593     default:
2594       fatal("JVM_GetCPMethodModifiers: illegal constant");
2595   }
2596   ShouldNotReachHere();
2597   return 0;
2598 JVM_END
2599 
2600 
2601 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2602 
2603 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2604   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2605 JVM_END
2606 
2607 
2608 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2609   JVMWrapper("JVM_IsSameClassPackage");
2610   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2611   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2612   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2613   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2614   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2615 JVM_END
2616 
2617 
2618 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2619 
2620 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2621   JVMWrapper2("JVM_Open (%s)", fname);
2622 
2623   //%note jvm_r6
2624   int result = os::open(fname, flags, mode);
2625   if (result >= 0) {
2626     return result;
2627   } else {
2628     switch(errno) {
2629       case EEXIST:
2630         return JVM_EEXIST;
2631       default:
2632         return -1;
2633     }
2634   }
2635 JVM_END
2636 
2637 
2638 JVM_LEAF(jint, JVM_Close(jint fd))
2639   JVMWrapper2("JVM_Close (0x%x)", fd);
2640   //%note jvm_r6
2641   return os::close(fd);
2642 JVM_END
2643 
2644 
2645 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2646   JVMWrapper2("JVM_Read (0x%x)", fd);
2647 
2648   //%note jvm_r6
2649   return (jint)os::restartable_read(fd, buf, nbytes);
2650 JVM_END
2651 
2652 
2653 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2654   JVMWrapper2("JVM_Write (0x%x)", fd);
2655 
2656   //%note jvm_r6
2657   return (jint)os::write(fd, buf, nbytes);
2658 JVM_END
2659 
2660 
2661 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2662   JVMWrapper2("JVM_Available (0x%x)", fd);
2663   //%note jvm_r6
2664   return os::available(fd, pbytes);
2665 JVM_END
2666 
2667 
2668 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2669   JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2670   //%note jvm_r6
2671   return os::lseek(fd, offset, whence);
2672 JVM_END
2673 
2674 
2675 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2676   JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2677   return os::ftruncate(fd, length);
2678 JVM_END
2679 
2680 
2681 JVM_LEAF(jint, JVM_Sync(jint fd))
2682   JVMWrapper2("JVM_Sync (0x%x)", fd);
2683   //%note jvm_r6
2684   return os::fsync(fd);
2685 JVM_END
2686 
2687 
2688 // Printing support //////////////////////////////////////////////////
2689 extern "C" {
2690 
2691 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2692   // see bug 4399518, 4417214
2693   if ((intptr_t)count <= 0) return -1;
2694   return vsnprintf(str, count, fmt, args);
2695 }
2696 
2697 
2698 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2699   va_list args;
2700   int len;
2701   va_start(args, fmt);
2702   len = jio_vsnprintf(str, count, fmt, args);
2703   va_end(args);
2704   return len;
2705 }
2706 
2707 
2708 int jio_fprintf(FILE* f, const char *fmt, ...) {
2709   int len;
2710   va_list args;
2711   va_start(args, fmt);
2712   len = jio_vfprintf(f, fmt, args);
2713   va_end(args);
2714   return len;
2715 }
2716 
2717 
2718 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2719   if (Arguments::vfprintf_hook() != NULL) {
2720      return Arguments::vfprintf_hook()(f, fmt, args);
2721   } else {
2722     return vfprintf(f, fmt, args);
2723   }
2724 }
2725 
2726 
2727 JNIEXPORT int jio_printf(const char *fmt, ...) {
2728   int len;
2729   va_list args;
2730   va_start(args, fmt);
2731   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2732   va_end(args);
2733   return len;
2734 }
2735 
2736 
2737 // HotSpot specific jio method
2738 void jio_print(const char* s) {
2739   // Try to make this function as atomic as possible.
2740   if (Arguments::vfprintf_hook() != NULL) {
2741     jio_fprintf(defaultStream::output_stream(), "%s", s);
2742   } else {
2743     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2744     size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2745   }
2746 }
2747 
2748 } // Extern C
2749 
2750 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2751 
2752 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2753 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2754 // OSThread objects.  The exception to this rule is when the target object is the thread
2755 // doing the operation, in which case we know that the thread won't exit until the
2756 // operation is done (all exits being voluntary).  There are a few cases where it is
2757 // rather silly to do operations on yourself, like resuming yourself or asking whether
2758 // you are alive.  While these can still happen, they are not subject to deadlocks if
2759 // the lock is held while the operation occurs (this is not the case for suspend, for
2760 // instance), and are very unlikely.  Because IsAlive needs to be fast and its
2761 // implementation is local to this file, we always lock Threads_lock for that one.
2762 
2763 static void thread_entry(JavaThread* thread, TRAPS) {
2764   HandleMark hm(THREAD);
2765   Handle obj(THREAD, thread->threadObj());
2766   JavaValue result(T_VOID);
2767   JavaCalls::call_virtual(&result,
2768                           obj,
2769                           KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2770                           vmSymbols::run_method_name(),
2771                           vmSymbols::void_method_signature(),
2772                           THREAD);
2773 }
2774 
2775 
2776 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2777   JVMWrapper("JVM_StartThread");
2778   JavaThread *native_thread = NULL;
2779 
2780   // We cannot hold the Threads_lock when we throw an exception,
2781   // due to rank ordering issues. Example:  we might need to grab the
2782   // Heap_lock while we construct the exception.
2783   bool throw_illegal_thread_state = false;
2784 
2785   // We must release the Threads_lock before we can post a jvmti event
2786   // in Thread::start.
2787   {
2788     // Ensure that the C++ Thread and OSThread structures aren't freed before
2789     // we operate.
2790     MutexLocker mu(Threads_lock);
2791 
2792     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2793     // re-starting an already started thread, so we should usually find
2794     // that the JavaThread is null. However for a JNI attached thread
2795     // there is a small window between the Thread object being created
2796     // (with its JavaThread set) and the update to its threadStatus, so we
2797     // have to check for this
2798     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2799       throw_illegal_thread_state = true;
2800     } else {
2801       // We could also check the stillborn flag to see if this thread was already stopped, but
2802       // for historical reasons we let the thread detect that itself when it starts running
2803 
2804       jlong size =
2805              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2806       // Allocate the C++ Thread structure and create the native thread.  The
2807       // stack size retrieved from java is signed, but the constructor takes
2808       // size_t (an unsigned type), so avoid passing negative values which would
2809       // result in really large stacks.
2810       size_t sz = size > 0 ? (size_t) size : 0;
2811       native_thread = new JavaThread(&thread_entry, sz);
2812 
2813       // At this point it may be possible that no osthread was created for the
2814       // JavaThread due to lack of memory. Check for this situation and throw
2815       // an exception if necessary. Eventually we may want to change this so
2816       // that we only grab the lock if the thread was created successfully -
2817       // then we can also do this check and throw the exception in the
2818       // JavaThread constructor.
2819       if (native_thread->osthread() != NULL) {
2820         // Note: the current thread is not being used within "prepare".
2821         native_thread->prepare(jthread);
2822       }
2823     }
2824   }
2825 
2826   if (throw_illegal_thread_state) {
2827     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2828   }
2829 
2830   assert(native_thread != NULL, "Starting null thread?");
2831 
2832   if (native_thread->osthread() == NULL) {
2833     // No one should hold a reference to the 'native_thread'.
2834     delete native_thread;
2835     if (JvmtiExport::should_post_resource_exhausted()) {
2836       JvmtiExport::post_resource_exhausted(
2837         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2838         "unable to create new native thread");
2839     }
2840     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2841               "unable to create new native thread");
2842   }
2843 
2844   Thread::start(native_thread);
2845 
2846 JVM_END
2847 
2848 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2849 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2850 // but is thought to be reliable and simple. In the case, where the receiver is the
2851 // same thread as the sender, no safepoint is needed.
2852 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2853   JVMWrapper("JVM_StopThread");
2854 
2855   oop java_throwable = JNIHandles::resolve(throwable);
2856   if (java_throwable == NULL) {
2857     THROW(vmSymbols::java_lang_NullPointerException());
2858   }
2859   oop java_thread = JNIHandles::resolve_non_null(jthread);
2860   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2861   Events::log_exception(JavaThread::current(),
2862                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2863                         receiver, (address)java_thread, throwable);
2864   // First check if thread is alive
2865   if (receiver != NULL) {
2866     // Check if exception is getting thrown at self (use oop equality, since the
2867     // target object might exit)
2868     if (java_thread == thread->threadObj()) {
2869       THROW_OOP(java_throwable);
2870     } else {
2871       // Enques a VM_Operation to stop all threads and then deliver the exception...
2872       Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2873     }
2874   }
2875   else {
2876     // Either:
2877     // - target thread has not been started before being stopped, or
2878     // - target thread already terminated
2879     // We could read the threadStatus to determine which case it is
2880     // but that is overkill as it doesn't matter. We must set the
2881     // stillborn flag for the first case, and if the thread has already
2882     // exited setting this flag has no affect
2883     java_lang_Thread::set_stillborn(java_thread);
2884   }
2885 JVM_END
2886 
2887 
2888 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2889   JVMWrapper("JVM_IsThreadAlive");
2890 
2891   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2892   return java_lang_Thread::is_alive(thread_oop);
2893 JVM_END
2894 
2895 
2896 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2897   JVMWrapper("JVM_SuspendThread");
2898   oop java_thread = JNIHandles::resolve_non_null(jthread);
2899   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2900 
2901   if (receiver != NULL) {
2902     // thread has run and has not exited (still on threads list)
2903 
2904     {
2905       MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2906       if (receiver->is_external_suspend()) {
2907         // Don't allow nested external suspend requests. We can't return
2908         // an error from this interface so just ignore the problem.
2909         return;
2910       }
2911       if (receiver->is_exiting()) { // thread is in the process of exiting
2912         return;
2913       }
2914       receiver->set_external_suspend();
2915     }
2916 
2917     // java_suspend() will catch threads in the process of exiting
2918     // and will ignore them.
2919     receiver->java_suspend();
2920 
2921     // It would be nice to have the following assertion in all the
2922     // time, but it is possible for a racing resume request to have
2923     // resumed this thread right after we suspended it. Temporarily
2924     // enable this assertion if you are chasing a different kind of
2925     // bug.
2926     //
2927     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2928     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2929   }
2930 JVM_END
2931 
2932 
2933 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2934   JVMWrapper("JVM_ResumeThread");
2935   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2936   // We need to *always* get the threads lock here, since this operation cannot be allowed during
2937   // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2938   // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2939   // looks at it.
2940   MutexLocker ml(Threads_lock);
2941   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2942   if (thr != NULL) {
2943     // the thread has run and is not in the process of exiting
2944     thr->java_resume();
2945   }
2946 JVM_END
2947 
2948 
2949 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2950   JVMWrapper("JVM_SetThreadPriority");
2951   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2952   MutexLocker ml(Threads_lock);
2953   oop java_thread = JNIHandles::resolve_non_null(jthread);
2954   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2955   JavaThread* thr = java_lang_Thread::thread(java_thread);
2956   if (thr != NULL) {                  // Thread not yet started; priority pushed down when it is
2957     Thread::set_priority(thr, (ThreadPriority)prio);
2958   }
2959 JVM_END
2960 
2961 
2962 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2963   JVMWrapper("JVM_Yield");
2964   if (os::dont_yield()) return;
2965 #ifndef USDT2
2966   HS_DTRACE_PROBE0(hotspot, thread__yield);
2967 #else /* USDT2 */
2968   HOTSPOT_THREAD_YIELD();
2969 #endif /* USDT2 */
2970   // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2971   // Critical for similar threading behaviour
2972   if (ConvertYieldToSleep) {
2973     os::sleep(thread, MinSleepInterval, false);
2974   } else {
2975     os::yield();
2976   }
2977 JVM_END
2978 
2979 
2980 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2981   JVMWrapper("JVM_Sleep");
2982 
2983   if (millis < 0) {
2984     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2985   }
2986 
2987   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2988     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2989   }
2990 
2991   // Save current thread state and restore it at the end of this block.
2992   // And set new thread state to SLEEPING.
2993   JavaThreadSleepState jtss(thread);
2994 
2995 #ifndef USDT2
2996   HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2997 #else /* USDT2 */
2998   HOTSPOT_THREAD_SLEEP_BEGIN(
2999                              millis);
3000 #endif /* USDT2 */
3001 
3002   if (millis == 0) {
3003     // When ConvertSleepToYield is on, this matches the classic VM implementation of
3004     // JVM_Sleep. Critical for similar threading behaviour (Win32)
3005     // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3006     // for SOLARIS
3007     if (ConvertSleepToYield) {
3008       os::yield();
3009     } else {
3010       ThreadState old_state = thread->osthread()->get_state();
3011       thread->osthread()->set_state(SLEEPING);
3012       os::sleep(thread, MinSleepInterval, false);
3013       thread->osthread()->set_state(old_state);
3014     }
3015   } else {
3016     ThreadState old_state = thread->osthread()->get_state();
3017     thread->osthread()->set_state(SLEEPING);
3018     if (os::sleep(thread, millis, true) == OS_INTRPT) {
3019       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3020       // us while we were sleeping. We do not overwrite those.
3021       if (!HAS_PENDING_EXCEPTION) {
3022 #ifndef USDT2
3023         HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3024 #else /* USDT2 */
3025         HOTSPOT_THREAD_SLEEP_END(
3026                                  1);
3027 #endif /* USDT2 */
3028         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3029         // to properly restore the thread state.  That's likely wrong.
3030         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3031       }
3032     }
3033     thread->osthread()->set_state(old_state);
3034   }
3035 #ifndef USDT2
3036   HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3037 #else /* USDT2 */
3038   HOTSPOT_THREAD_SLEEP_END(
3039                            0);
3040 #endif /* USDT2 */
3041 JVM_END
3042 
3043 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3044   JVMWrapper("JVM_CurrentThread");
3045   oop jthread = thread->threadObj();
3046   assert (thread != NULL, "no current thread!");
3047   return JNIHandles::make_local(env, jthread);
3048 JVM_END
3049 
3050 
3051 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3052   JVMWrapper("JVM_CountStackFrames");
3053 
3054   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3055   oop java_thread = JNIHandles::resolve_non_null(jthread);
3056   bool throw_illegal_thread_state = false;
3057   int count = 0;
3058 
3059   {
3060     MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3061     // We need to re-resolve the java_thread, since a GC might have happened during the
3062     // acquire of the lock
3063     JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3064 
3065     if (thr == NULL) {
3066       // do nothing
3067     } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3068       // Check whether this java thread has been suspended already. If not, throws
3069       // IllegalThreadStateException. We defer to throw that exception until
3070       // Threads_lock is released since loading exception class has to leave VM.
3071       // The correct way to test a thread is actually suspended is
3072       // wait_for_ext_suspend_completion(), but we can't call that while holding
3073       // the Threads_lock. The above tests are sufficient for our purposes
3074       // provided the walkability of the stack is stable - which it isn't
3075       // 100% but close enough for most practical purposes.
3076       throw_illegal_thread_state = true;
3077     } else {
3078       // Count all java activation, i.e., number of vframes
3079       for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3080         // Native frames are not counted
3081         if (!vfst.method()->is_native()) count++;
3082        }
3083     }
3084   }
3085 
3086   if (throw_illegal_thread_state) {
3087     THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3088                 "this thread is not suspended");
3089   }
3090   return count;
3091 JVM_END
3092 
3093 // Consider: A better way to implement JVM_Interrupt() is to acquire
3094 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3095 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3096 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3097 // outside the critical section.  Threads_lock is hot so we want to minimize
3098 // the hold-time.  A cleaner interface would be to decompose interrupt into
3099 // two steps.  The 1st phase, performed under Threads_lock, would return
3100 // a closure that'd be invoked after Threads_lock was dropped.
3101 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3102 // admit spurious wakeups.
3103 
3104 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3105   JVMWrapper("JVM_Interrupt");
3106 
3107   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3108   oop java_thread = JNIHandles::resolve_non_null(jthread);
3109   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3110   // We need to re-resolve the java_thread, since a GC might have happened during the
3111   // acquire of the lock
3112   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3113   if (thr != NULL) {
3114     Thread::interrupt(thr);
3115   }
3116 JVM_END
3117 
3118 
3119 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3120   JVMWrapper("JVM_IsInterrupted");
3121 
3122   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3123   oop java_thread = JNIHandles::resolve_non_null(jthread);
3124   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3125   // We need to re-resolve the java_thread, since a GC might have happened during the
3126   // acquire of the lock
3127   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3128   if (thr == NULL) {
3129     return JNI_FALSE;
3130   } else {
3131     return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3132   }
3133 JVM_END
3134 
3135 
3136 // Return true iff the current thread has locked the object passed in
3137 
3138 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3139   JVMWrapper("JVM_HoldsLock");
3140   assert(THREAD->is_Java_thread(), "sanity check");
3141   if (obj == NULL) {
3142     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3143   }
3144   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3145   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3146 JVM_END
3147 
3148 
3149 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3150   JVMWrapper("JVM_DumpAllStacks");
3151   VM_PrintThreads op;
3152   VMThread::execute(&op);
3153   if (JvmtiExport::should_post_data_dump()) {
3154     JvmtiExport::post_data_dump();
3155   }
3156 JVM_END
3157 
3158 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3159   JVMWrapper("JVM_SetNativeThreadName");
3160   ResourceMark rm(THREAD);
3161   oop java_thread = JNIHandles::resolve_non_null(jthread);
3162   JavaThread* thr = java_lang_Thread::thread(java_thread);
3163   // Thread naming only supported for the current thread, doesn't work for
3164   // target threads.
3165   if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3166     // we don't set the name of an attached thread to avoid stepping
3167     // on other programs
3168     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3169     os::set_native_thread_name(thread_name);
3170   }
3171 JVM_END
3172 
3173 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3174 
3175 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3176   assert(jthread->is_Java_thread(), "must be a Java thread");
3177   if (jthread->privileged_stack_top() == NULL) return false;
3178   if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3179     oop loader = jthread->privileged_stack_top()->class_loader();
3180     if (loader == NULL) return true;
3181     bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3182     if (trusted) return true;
3183   }
3184   return false;
3185 }
3186 
3187 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3188   JVMWrapper("JVM_CurrentLoadedClass");
3189   ResourceMark rm(THREAD);
3190 
3191   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3192     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3193     bool trusted = is_trusted_frame(thread, &vfst);
3194     if (trusted) return NULL;
3195 
3196     Method* m = vfst.method();
3197     if (!m->is_native()) {
3198       InstanceKlass* holder = m->method_holder();
3199       oop loader = holder->class_loader();
3200       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3201         return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3202       }
3203     }
3204   }
3205   return NULL;
3206 JVM_END
3207 
3208 
3209 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3210   JVMWrapper("JVM_CurrentClassLoader");
3211   ResourceMark rm(THREAD);
3212 
3213   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3214 
3215     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3216     bool trusted = is_trusted_frame(thread, &vfst);
3217     if (trusted) return NULL;
3218 
3219     Method* m = vfst.method();
3220     if (!m->is_native()) {
3221       InstanceKlass* holder = m->method_holder();
3222       assert(holder->is_klass(), "just checking");
3223       oop loader = holder->class_loader();
3224       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3225         return JNIHandles::make_local(env, loader);
3226       }
3227     }
3228   }
3229   return NULL;
3230 JVM_END
3231 
3232 
3233 // Utility object for collecting method holders walking down the stack
3234 class KlassLink: public ResourceObj {
3235  public:
3236   KlassHandle klass;
3237   KlassLink*  next;
3238 
3239   KlassLink(KlassHandle k) { klass = k; next = NULL; }
3240 };
3241 
3242 
3243 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3244   JVMWrapper("JVM_GetClassContext");
3245   ResourceMark rm(THREAD);
3246   JvmtiVMObjectAllocEventCollector oam;
3247   // Collect linked list of (handles to) method holders
3248   KlassLink* first = NULL;
3249   KlassLink* last  = NULL;
3250   int depth = 0;
3251   vframeStream vfst(thread);
3252 
3253   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3254     // This must only be called from SecurityManager.getClassContext
3255     Method* m = vfst.method();
3256     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3257           m->name()          == vmSymbols::getClassContext_name() &&
3258           m->signature()     == vmSymbols::void_class_array_signature())) {
3259       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3260     }
3261   }
3262 
3263   // Collect method holders
3264   for (; !vfst.at_end(); vfst.security_next()) {
3265     Method* m = vfst.method();
3266     // Native frames are not returned
3267     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3268       Klass* holder = m->method_holder();
3269       assert(holder->is_klass(), "just checking");
3270       depth++;
3271       KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3272       if (first == NULL) {
3273         first = last = l;
3274       } else {
3275         last->next = l;
3276         last = l;
3277       }
3278     }
3279   }
3280 
3281   // Create result array of type [Ljava/lang/Class;
3282   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3283   // Fill in mirrors corresponding to method holders
3284   int index = 0;
3285   while (first != NULL) {
3286     result->obj_at_put(index++, first->klass()->java_mirror());
3287     first = first->next;
3288   }
3289   assert(index == depth, "just checking");
3290 
3291   return (jobjectArray) JNIHandles::make_local(env, result);
3292 JVM_END
3293 
3294 
3295 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3296   JVMWrapper("JVM_ClassDepth");
3297   ResourceMark rm(THREAD);
3298   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3299   Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3300 
3301   const char* str = java_lang_String::as_utf8_string(class_name_str());
3302   TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3303   if (class_name_sym == NULL) {
3304     return -1;
3305   }
3306 
3307   int depth = 0;
3308 
3309   for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3310     if (!vfst.method()->is_native()) {
3311       InstanceKlass* holder = vfst.method()->method_holder();
3312       assert(holder->is_klass(), "just checking");
3313       if (holder->name() == class_name_sym) {
3314         return depth;
3315       }
3316       depth++;
3317     }
3318   }
3319   return -1;
3320 JVM_END
3321 
3322 
3323 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3324   JVMWrapper("JVM_ClassLoaderDepth");
3325   ResourceMark rm(THREAD);
3326   int depth = 0;
3327   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3328     // if a method in a class in a trusted loader is in a doPrivileged, return -1
3329     bool trusted = is_trusted_frame(thread, &vfst);
3330     if (trusted) return -1;
3331 
3332     Method* m = vfst.method();
3333     if (!m->is_native()) {
3334       InstanceKlass* holder = m->method_holder();
3335       assert(holder->is_klass(), "just checking");
3336       oop loader = holder->class_loader();
3337       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3338         return depth;
3339       }
3340       depth++;
3341     }
3342   }
3343   return -1;
3344 JVM_END
3345 
3346 
3347 // java.lang.Package ////////////////////////////////////////////////////////////////
3348 
3349 
3350 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3351   JVMWrapper("JVM_GetSystemPackage");
3352   ResourceMark rm(THREAD);
3353   JvmtiVMObjectAllocEventCollector oam;
3354   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3355   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3356   return (jstring) JNIHandles::make_local(result);
3357 JVM_END
3358 
3359 
3360 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3361   JVMWrapper("JVM_GetSystemPackages");
3362   JvmtiVMObjectAllocEventCollector oam;
3363   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3364   return (jobjectArray) JNIHandles::make_local(result);
3365 JVM_END
3366 
3367 
3368 // ObjectInputStream ///////////////////////////////////////////////////////////////
3369 
3370 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3371   if (current_class == NULL) {
3372     return true;
3373   }
3374   if ((current_class == field_class) || access.is_public()) {
3375     return true;
3376   }
3377 
3378   if (access.is_protected()) {
3379     // See if current_class is a subclass of field_class
3380     if (current_class->is_subclass_of(field_class)) {
3381       return true;
3382     }
3383   }
3384 
3385   return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3386 }
3387 
3388 
3389 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3390 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3391   JVMWrapper("JVM_AllocateNewObject");
3392   JvmtiVMObjectAllocEventCollector oam;
3393   // Receiver is not used
3394   oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3395   oop init_mirror = JNIHandles::resolve_non_null(initClass);
3396 
3397   // Cannot instantiate primitive types
3398   if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3399     ResourceMark rm(THREAD);
3400     THROW_0(vmSymbols::java_lang_InvalidClassException());
3401   }
3402 
3403   // Arrays not allowed here, must use JVM_AllocateNewArray
3404   if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3405       java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3406     ResourceMark rm(THREAD);
3407     THROW_0(vmSymbols::java_lang_InvalidClassException());
3408   }
3409 
3410   instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3411   instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3412 
3413   assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3414 
3415   // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3416   curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3417 
3418   // Make sure klass is initialized, since we are about to instantiate one of them.
3419   curr_klass->initialize(CHECK_NULL);
3420 
3421  methodHandle m (THREAD,
3422                  init_klass->find_method(vmSymbols::object_initializer_name(),
3423                                          vmSymbols::void_method_signature()));
3424   if (m.is_null()) {
3425     ResourceMark rm(THREAD);
3426     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3427                 Method::name_and_sig_as_C_string(init_klass(),
3428                                           vmSymbols::object_initializer_name(),
3429                                           vmSymbols::void_method_signature()));
3430   }
3431 
3432   if (curr_klass ==  init_klass && !m->is_public()) {
3433     // Calling the constructor for class 'curr_klass'.
3434     // Only allow calls to a public no-arg constructor.
3435     // This path corresponds to creating an Externalizable object.
3436     THROW_0(vmSymbols::java_lang_IllegalAccessException());
3437   }
3438 
3439   if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3440     // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3441     THROW_0(vmSymbols::java_lang_IllegalAccessException());
3442   }
3443 
3444   Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3445   // Call constructor m. This might call a constructor higher up in the hierachy
3446   JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3447 
3448   return JNIHandles::make_local(obj());
3449 JVM_END
3450 
3451 
3452 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3453   JVMWrapper("JVM_AllocateNewArray");
3454   JvmtiVMObjectAllocEventCollector oam;
3455   oop mirror = JNIHandles::resolve_non_null(currClass);
3456 
3457   if (java_lang_Class::is_primitive(mirror)) {
3458     THROW_0(vmSymbols::java_lang_InvalidClassException());
3459   }
3460   Klass* k = java_lang_Class::as_Klass(mirror);
3461   oop result;
3462 
3463   if (k->oop_is_typeArray()) {
3464     // typeArray
3465     result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3466   } else if (k->oop_is_objArray()) {
3467     // objArray
3468     ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3469     oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3470     result = oak->allocate(length, CHECK_NULL);
3471   } else {
3472     THROW_0(vmSymbols::java_lang_InvalidClassException());
3473   }
3474   return JNIHandles::make_local(env, result);
3475 JVM_END
3476 
3477 
3478 // Return the first non-null class loader up the execution stack, or null
3479 // if only code from the null class loader is on the stack.
3480 
3481 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3482   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3483     // UseNewReflection
3484     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3485     oop loader = vfst.method()->method_holder()->class_loader();
3486     if (loader != NULL) {
3487       return JNIHandles::make_local(env, loader);
3488     }
3489   }
3490   return NULL;
3491 JVM_END
3492 
3493 
3494 // Load a class relative to the most recent class on the stack  with a non-null
3495 // classloader.
3496 // This function has been deprecated and should not be considered part of the
3497 // specified JVM interface.
3498 
3499 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3500                                  jclass currClass, jstring currClassName))
3501   JVMWrapper("JVM_LoadClass0");
3502   // Receiver is not used
3503   ResourceMark rm(THREAD);
3504 
3505   // Class name argument is not guaranteed to be in internal format
3506   Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3507   Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3508 
3509   const char* str = java_lang_String::as_utf8_string(string());
3510 
3511   if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3512     // It's impossible to create this class;  the name cannot fit
3513     // into the constant pool.
3514     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3515   }
3516 
3517   TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3518   Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3519   // Find the most recent class on the stack with a non-null classloader
3520   oop loader = NULL;
3521   oop protection_domain = NULL;
3522   if (curr_klass.is_null()) {
3523     for (vframeStream vfst(thread);
3524          !vfst.at_end() && loader == NULL;
3525          vfst.next()) {
3526       if (!vfst.method()->is_native()) {
3527         InstanceKlass* holder = vfst.method()->method_holder();
3528         loader             = holder->class_loader();
3529         protection_domain  = holder->protection_domain();
3530       }
3531     }
3532   } else {
3533     Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3534     loader            = InstanceKlass::cast(curr_klass_oop)->class_loader();
3535     protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3536   }
3537   Handle h_loader(THREAD, loader);
3538   Handle h_prot  (THREAD, protection_domain);
3539   jclass result =  find_class_from_class_loader(env, name, true, h_loader, h_prot,
3540                                                 false, thread);
3541   if (TraceClassResolution && result != NULL) {
3542     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3543   }
3544   return result;
3545 JVM_END
3546 
3547 
3548 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3549 
3550 
3551 // resolve array handle and check arguments
3552 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3553   if (arr == NULL) {
3554     THROW_0(vmSymbols::java_lang_NullPointerException());
3555   }
3556   oop a = JNIHandles::resolve_non_null(arr);
3557   if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3558     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3559   }
3560   return arrayOop(a);
3561 }
3562 
3563 
3564 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3565   JVMWrapper("JVM_GetArrayLength");
3566   arrayOop a = check_array(env, arr, false, CHECK_0);
3567   return a->length();
3568 JVM_END
3569 
3570 
3571 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3572   JVMWrapper("JVM_Array_Get");
3573   JvmtiVMObjectAllocEventCollector oam;
3574   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3575   jvalue value;
3576   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3577   oop box = Reflection::box(&value, type, CHECK_NULL);
3578   return JNIHandles::make_local(env, box);
3579 JVM_END
3580 
3581 
3582 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3583   JVMWrapper("JVM_GetPrimitiveArrayElement");
3584   jvalue value;
3585   value.i = 0; // to initialize value before getting used in CHECK
3586   arrayOop a = check_array(env, arr, true, CHECK_(value));
3587   assert(a->is_typeArray(), "just checking");
3588   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3589   BasicType wide_type = (BasicType) wCode;
3590   if (type != wide_type) {
3591     Reflection::widen(&value, type, wide_type, CHECK_(value));
3592   }
3593   return value;
3594 JVM_END
3595 
3596 
3597 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3598   JVMWrapper("JVM_SetArrayElement");
3599   arrayOop a = check_array(env, arr, false, CHECK);
3600   oop box = JNIHandles::resolve(val);
3601   jvalue value;
3602   value.i = 0; // to initialize value before getting used in CHECK
3603   BasicType value_type;
3604   if (a->is_objArray()) {
3605     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3606     value_type = Reflection::unbox_for_regular_object(box, &value);
3607   } else {
3608     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3609   }
3610   Reflection::array_set(&value, a, index, value_type, CHECK);
3611 JVM_END
3612 
3613 
3614 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3615   JVMWrapper("JVM_SetPrimitiveArrayElement");
3616   arrayOop a = check_array(env, arr, true, CHECK);
3617   assert(a->is_typeArray(), "just checking");
3618   BasicType value_type = (BasicType) vCode;
3619   Reflection::array_set(&v, a, index, value_type, CHECK);
3620 JVM_END
3621 
3622 
3623 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3624   JVMWrapper("JVM_NewArray");
3625   JvmtiVMObjectAllocEventCollector oam;
3626   oop element_mirror = JNIHandles::resolve(eltClass);
3627   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3628   return JNIHandles::make_local(env, result);
3629 JVM_END
3630 
3631 
3632 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3633   JVMWrapper("JVM_NewMultiArray");
3634   JvmtiVMObjectAllocEventCollector oam;
3635   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3636   oop element_mirror = JNIHandles::resolve(eltClass);
3637   assert(dim_array->is_typeArray(), "just checking");
3638   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3639   return JNIHandles::make_local(env, result);
3640 JVM_END
3641 
3642 
3643 // Networking library support ////////////////////////////////////////////////////////////////////
3644 
3645 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3646   JVMWrapper("JVM_InitializeSocketLibrary");
3647   return 0;
3648 JVM_END
3649 
3650 
3651 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3652   JVMWrapper("JVM_Socket");
3653   return os::socket(domain, type, protocol);
3654 JVM_END
3655 
3656 
3657 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3658   JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3659   //%note jvm_r6
3660   return os::socket_close(fd);
3661 JVM_END
3662 
3663 
3664 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3665   JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3666   //%note jvm_r6
3667   return os::socket_shutdown(fd, howto);
3668 JVM_END
3669 
3670 
3671 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3672   JVMWrapper2("JVM_Recv (0x%x)", fd);
3673   //%note jvm_r6
3674   return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3675 JVM_END
3676 
3677 
3678 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3679   JVMWrapper2("JVM_Send (0x%x)", fd);
3680   //%note jvm_r6
3681   return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3682 JVM_END
3683 
3684 
3685 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3686   JVMWrapper2("JVM_Timeout (0x%x)", fd);
3687   //%note jvm_r6
3688   return os::timeout(fd, timeout);
3689 JVM_END
3690 
3691 
3692 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3693   JVMWrapper2("JVM_Listen (0x%x)", fd);
3694   //%note jvm_r6
3695   return os::listen(fd, count);
3696 JVM_END
3697 
3698 
3699 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3700   JVMWrapper2("JVM_Connect (0x%x)", fd);
3701   //%note jvm_r6
3702   return os::connect(fd, him, (socklen_t)len);
3703 JVM_END
3704 
3705 
3706 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3707   JVMWrapper2("JVM_Bind (0x%x)", fd);
3708   //%note jvm_r6
3709   return os::bind(fd, him, (socklen_t)len);
3710 JVM_END
3711 
3712 
3713 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3714   JVMWrapper2("JVM_Accept (0x%x)", fd);
3715   //%note jvm_r6
3716   socklen_t socklen = (socklen_t)(*len);
3717   jint result = os::accept(fd, him, &socklen);
3718   *len = (jint)socklen;
3719   return result;
3720 JVM_END
3721 
3722 
3723 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3724   JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3725   //%note jvm_r6
3726   socklen_t socklen = (socklen_t)(*fromlen);
3727   jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3728   *fromlen = (int)socklen;
3729   return result;
3730 JVM_END
3731 
3732 
3733 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3734   JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3735   //%note jvm_r6
3736   socklen_t socklen = (socklen_t)(*len);
3737   jint result = os::get_sock_name(fd, him, &socklen);
3738   *len = (int)socklen;
3739   return result;
3740 JVM_END
3741 
3742 
3743 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3744   JVMWrapper2("JVM_SendTo (0x%x)", fd);
3745   //%note jvm_r6
3746   return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3747 JVM_END
3748 
3749 
3750 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3751   JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3752   //%note jvm_r6
3753   return os::socket_available(fd, pbytes);
3754 JVM_END
3755 
3756 
3757 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3758   JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3759   //%note jvm_r6
3760   socklen_t socklen = (socklen_t)(*optlen);
3761   jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3762   *optlen = (int)socklen;
3763   return result;
3764 JVM_END
3765 
3766 
3767 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3768   JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3769   //%note jvm_r6
3770   return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3771 JVM_END
3772 
3773 
3774 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3775   JVMWrapper("JVM_GetHostName");
3776   return os::get_host_name(name, namelen);
3777 JVM_END
3778 
3779 
3780 // Library support ///////////////////////////////////////////////////////////////////////////
3781 
3782 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3783   //%note jvm_ct
3784   JVMWrapper2("JVM_LoadLibrary (%s)", name);
3785   char ebuf[1024];
3786   void *load_result;
3787   {
3788     ThreadToNativeFromVM ttnfvm(thread);
3789     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3790   }
3791   if (load_result == NULL) {
3792     char msg[1024];
3793     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3794     // Since 'ebuf' may contain a string encoded using
3795     // platform encoding scheme, we need to pass
3796     // Exceptions::unsafe_to_utf8 to the new_exception method
3797     // as the last argument. See bug 6367357.
3798     Handle h_exception =
3799       Exceptions::new_exception(thread,
3800                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3801                                 msg, Exceptions::unsafe_to_utf8);
3802 
3803     THROW_HANDLE_0(h_exception);
3804   }
3805   return load_result;
3806 JVM_END
3807 
3808 
3809 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3810   JVMWrapper("JVM_UnloadLibrary");
3811   os::dll_unload(handle);
3812 JVM_END
3813 
3814 
3815 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3816   JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3817   return os::dll_lookup(handle, name);
3818 JVM_END
3819 
3820 
3821 // Floating point support ////////////////////////////////////////////////////////////////////
3822 
3823 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3824   JVMWrapper("JVM_IsNaN");
3825   return g_isnan(a);
3826 JVM_END
3827 
3828 
3829 // JNI version ///////////////////////////////////////////////////////////////////////////////
3830 
3831 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3832   JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3833   return Threads::is_supported_jni_version_including_1_1(version);
3834 JVM_END
3835 
3836 
3837 // String support ///////////////////////////////////////////////////////////////////////////
3838 
3839 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3840   JVMWrapper("JVM_InternString");
3841   JvmtiVMObjectAllocEventCollector oam;
3842   if (str == NULL) return NULL;
3843   oop string = JNIHandles::resolve_non_null(str);
3844   oop result = StringTable::intern(string, CHECK_NULL);
3845   return (jstring) JNIHandles::make_local(env, result);
3846 JVM_END
3847 
3848 
3849 // Raw monitor support //////////////////////////////////////////////////////////////////////
3850 
3851 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3852 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3853 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3854 // that only works with java threads.
3855 
3856 
3857 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3858   VM_Exit::block_if_vm_exited();
3859   JVMWrapper("JVM_RawMonitorCreate");
3860   return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3861 }
3862 
3863 
3864 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3865   VM_Exit::block_if_vm_exited();
3866   JVMWrapper("JVM_RawMonitorDestroy");
3867   delete ((Mutex*) mon);
3868 }
3869 
3870 
3871 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3872   VM_Exit::block_if_vm_exited();
3873   JVMWrapper("JVM_RawMonitorEnter");
3874   ((Mutex*) mon)->jvm_raw_lock();
3875   return 0;
3876 }
3877 
3878 
3879 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3880   VM_Exit::block_if_vm_exited();
3881   JVMWrapper("JVM_RawMonitorExit");
3882   ((Mutex*) mon)->jvm_raw_unlock();
3883 }
3884 
3885 
3886 // Support for Serialization
3887 
3888 typedef jfloat  (JNICALL *IntBitsToFloatFn  )(JNIEnv* env, jclass cb, jint    value);
3889 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong   value);
3890 typedef jint    (JNICALL *FloatToIntBitsFn  )(JNIEnv* env, jclass cb, jfloat  value);
3891 typedef jlong   (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3892 
3893 static IntBitsToFloatFn   int_bits_to_float_fn   = NULL;
3894 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3895 static FloatToIntBitsFn   float_to_int_bits_fn   = NULL;
3896 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3897 
3898 
3899 void initialize_converter_functions() {
3900   if (JDK_Version::is_gte_jdk14x_version()) {
3901     // These functions only exist for compatibility with 1.3.1 and earlier
3902     return;
3903   }
3904 
3905   // called from universe_post_init()
3906   assert(
3907     int_bits_to_float_fn   == NULL &&
3908     long_bits_to_double_fn == NULL &&
3909     float_to_int_bits_fn   == NULL &&
3910     double_to_long_bits_fn == NULL ,
3911     "initialization done twice"
3912   );
3913   // initialize
3914   int_bits_to_float_fn   = CAST_TO_FN_PTR(IntBitsToFloatFn  , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat"  , "(I)F"));
3915   long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3916   float_to_int_bits_fn   = CAST_TO_FN_PTR(FloatToIntBitsFn  , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits"  , "(F)I"));
3917   double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3918   // verify
3919   assert(
3920     int_bits_to_float_fn   != NULL &&
3921     long_bits_to_double_fn != NULL &&
3922     float_to_int_bits_fn   != NULL &&
3923     double_to_long_bits_fn != NULL ,
3924     "initialization failed"
3925   );
3926 }
3927 
3928 
3929 // Serialization
3930 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3931                                             jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3932   assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3933 
3934   typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3935   typeArrayOop dbuf   = typeArrayOop(JNIHandles::resolve(data));
3936   typeArrayOop fids   = typeArrayOop(JNIHandles::resolve(fieldIDs));
3937   oop          o      = JNIHandles::resolve(obj);
3938 
3939   if (o == NULL || fids == NULL  || dbuf == NULL  || tcodes == NULL) {
3940     THROW(vmSymbols::java_lang_NullPointerException());
3941   }
3942 
3943   jsize nfids = fids->length();
3944   if (nfids == 0) return;
3945 
3946   if (tcodes->length() < nfids) {
3947     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3948   }
3949 
3950   jsize off = 0;
3951   /* loop through fields, setting values */
3952   for (jsize i = 0; i < nfids; i++) {
3953     jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3954     int field_offset;
3955     if (fid != NULL) {
3956       // NULL is a legal value for fid, but retrieving the field offset
3957       // trigger assertion in that case
3958       field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3959     }
3960 
3961     switch (tcodes->char_at(i)) {
3962       case 'Z':
3963         if (fid != NULL) {
3964           jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3965           o->bool_field_put(field_offset, val);
3966         }
3967         off++;
3968         break;
3969 
3970       case 'B':
3971         if (fid != NULL) {
3972           o->byte_field_put(field_offset, dbuf->byte_at(off));
3973         }
3974         off++;
3975         break;
3976 
3977       case 'C':
3978         if (fid != NULL) {
3979           jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3980                     + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3981           o->char_field_put(field_offset, val);
3982         }
3983         off += 2;
3984         break;
3985 
3986       case 'S':
3987         if (fid != NULL) {
3988           jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3989                      + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3990           o->short_field_put(field_offset, val);
3991         }
3992         off += 2;
3993         break;
3994 
3995       case 'I':
3996         if (fid != NULL) {
3997           jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3998                     + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3999                     + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4000                     + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4001           o->int_field_put(field_offset, ival);
4002         }
4003         off += 4;
4004         break;
4005 
4006       case 'F':
4007         if (fid != NULL) {
4008           jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4009                     + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4010                     + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4011                     + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4012           jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4013           o->float_field_put(field_offset, fval);
4014         }
4015         off += 4;
4016         break;
4017 
4018       case 'J':
4019         if (fid != NULL) {
4020           jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4021                      + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4022                      + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4023                      + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4024                      + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4025                      + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4026                      + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4027                      + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4028           o->long_field_put(field_offset, lval);
4029         }
4030         off += 8;
4031         break;
4032 
4033       case 'D':
4034         if (fid != NULL) {
4035           jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4036                      + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4037                      + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4038                      + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4039                      + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4040                      + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4041                      + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4042                      + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4043           jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4044           o->double_field_put(field_offset, dval);
4045         }
4046         off += 8;
4047         break;
4048 
4049       default:
4050         // Illegal typecode
4051         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4052     }
4053   }
4054 JVM_END
4055 
4056 
4057 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4058                             jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4059   assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4060 
4061   typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4062   typeArrayOop dbuf   = typeArrayOop(JNIHandles::resolve(data));
4063   typeArrayOop fids   = typeArrayOop(JNIHandles::resolve(fieldIDs));
4064   oop          o      = JNIHandles::resolve(obj);
4065 
4066   if (o == NULL || fids == NULL  || dbuf == NULL  || tcodes == NULL) {
4067     THROW(vmSymbols::java_lang_NullPointerException());
4068   }
4069 
4070   jsize nfids = fids->length();
4071   if (nfids == 0) return;
4072 
4073   if (tcodes->length() < nfids) {
4074     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4075   }
4076 
4077   /* loop through fields, fetching values */
4078   jsize off = 0;
4079   for (jsize i = 0; i < nfids; i++) {
4080     jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4081     if (fid == NULL) {
4082       THROW(vmSymbols::java_lang_NullPointerException());
4083     }
4084     int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4085 
4086      switch (tcodes->char_at(i)) {
4087        case 'Z':
4088          {
4089            jboolean val = o->bool_field(field_offset);
4090            dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4091          }
4092          break;
4093 
4094        case 'B':
4095          dbuf->byte_at_put(off++, o->byte_field(field_offset));
4096          break;
4097 
4098        case 'C':
4099          {
4100            jchar val = o->char_field(field_offset);
4101            dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4102            dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4103          }
4104          break;
4105 
4106        case 'S':
4107          {
4108            jshort val = o->short_field(field_offset);
4109            dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4110            dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4111          }
4112          break;
4113 
4114        case 'I':
4115          {
4116            jint val = o->int_field(field_offset);
4117            dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4118            dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4119            dbuf->byte_at_put(off++, (val >> 8)  & 0xFF);
4120            dbuf->byte_at_put(off++, (val >> 0)  & 0xFF);
4121          }
4122          break;
4123 
4124        case 'F':
4125          {
4126            jfloat fval = o->float_field(field_offset);
4127            jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4128            dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4129            dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4130            dbuf->byte_at_put(off++, (ival >> 8)  & 0xFF);
4131            dbuf->byte_at_put(off++, (ival >> 0)  & 0xFF);
4132          }
4133          break;
4134 
4135        case 'J':
4136          {
4137            jlong val = o->long_field(field_offset);
4138            dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4139            dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4140            dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4141            dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4142            dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4143            dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4144            dbuf->byte_at_put(off++, (val >> 8)  & 0xFF);
4145            dbuf->byte_at_put(off++, (val >> 0)  & 0xFF);
4146          }
4147          break;
4148 
4149        case 'D':
4150          {
4151            jdouble dval = o->double_field(field_offset);
4152            jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4153            dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4154            dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4155            dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4156            dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4157            dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4158            dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4159            dbuf->byte_at_put(off++, (lval >> 8)  & 0xFF);
4160            dbuf->byte_at_put(off++, (lval >> 0)  & 0xFF);
4161          }
4162          break;
4163 
4164        default:
4165          // Illegal typecode
4166          THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4167      }
4168   }
4169 JVM_END
4170 
4171 
4172 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4173 
4174 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4175   // Security Note:
4176   //   The Java level wrapper will perform the necessary security check allowing
4177   //   us to pass the NULL as the initiating class loader.
4178   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4179 
4180   KlassHandle klass_handle(THREAD, klass);
4181   // Check if we should initialize the class
4182   if (init && klass_handle->oop_is_instance()) {
4183     klass_handle->initialize(CHECK_NULL);
4184   }
4185   return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4186 }
4187 
4188 
4189 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4190 
4191 #ifndef PRODUCT
4192 
4193 extern "C" {
4194   JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4195   JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4196   JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4197 }
4198 
4199 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4200   JVMWrapper("JVM_AccessBoolVMFlag");
4201   return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4202 JVM_END
4203 
4204 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4205   JVMWrapper("JVM_AccessVMIntFlag");
4206   intx v;
4207   jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4208   *value = (jint)v;
4209   return result;
4210 JVM_END
4211 
4212 
4213 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4214   JVMWrapper("JVM_VMBreakPoint");
4215   oop the_obj = JNIHandles::resolve(obj);
4216   BREAKPOINT;
4217 JVM_END
4218 
4219 
4220 #endif
4221 
4222 
4223 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4224 
4225 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4226   JVMWrapper("JVM_InvokeMethod");
4227   Handle method_handle;
4228   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4229     method_handle = Handle(THREAD, JNIHandles::resolve(method));
4230     Handle receiver(THREAD, JNIHandles::resolve(obj));
4231     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4232     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4233     jobject res = JNIHandles::make_local(env, result);
4234     if (JvmtiExport::should_post_vm_object_alloc()) {
4235       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4236       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4237       if (java_lang_Class::is_primitive(ret_type)) {
4238         // Only for primitive type vm allocates memory for java object.
4239         // See box() method.
4240         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4241       }
4242     }
4243     return res;
4244   } else {
4245     THROW_0(vmSymbols::java_lang_StackOverflowError());
4246   }
4247 JVM_END
4248 
4249 
4250 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4251   JVMWrapper("JVM_NewInstanceFromConstructor");
4252   oop constructor_mirror = JNIHandles::resolve(c);
4253   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4254   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4255   jobject res = JNIHandles::make_local(env, result);
4256   if (JvmtiExport::should_post_vm_object_alloc()) {
4257     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4258   }
4259   return res;
4260 JVM_END
4261 
4262 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4263 
4264 JVM_LEAF(jboolean, JVM_SupportsCX8())
4265   JVMWrapper("JVM_SupportsCX8");
4266   return VM_Version::supports_cx8();
4267 JVM_END
4268 
4269 
4270 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4271   JVMWrapper("JVM_CX8Field");
4272   jlong res;
4273   oop             o       = JNIHandles::resolve(obj);
4274   intptr_t        fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4275   volatile jlong* addr    = (volatile jlong*)((address)o + fldOffs);
4276 
4277   assert(VM_Version::supports_cx8(), "cx8 not supported");
4278   res = Atomic::cmpxchg(newVal, addr, oldVal);
4279 
4280   return res == oldVal;
4281 JVM_END
4282 
4283 // DTrace ///////////////////////////////////////////////////////////////////
4284 
4285 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4286   JVMWrapper("JVM_DTraceGetVersion");
4287   return (jint)JVM_TRACING_DTRACE_VERSION;
4288 JVM_END
4289 
4290 JVM_ENTRY(jlong,JVM_DTraceActivate(
4291     JNIEnv* env, jint version, jstring module_name, jint providers_count,
4292     JVM_DTraceProvider* providers))
4293   JVMWrapper("JVM_DTraceActivate");
4294   return DTraceJSDT::activate(
4295     version, module_name, providers_count, providers, CHECK_0);
4296 JVM_END
4297 
4298 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4299   JVMWrapper("JVM_DTraceIsProbeEnabled");
4300   return DTraceJSDT::is_probe_enabled(method);
4301 JVM_END
4302 
4303 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4304   JVMWrapper("JVM_DTraceDispose");
4305   DTraceJSDT::dispose(handle);
4306 JVM_END
4307 
4308 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4309   JVMWrapper("JVM_DTraceIsSupported");
4310   return DTraceJSDT::is_supported();
4311 JVM_END
4312 
4313 // Returns an array of all live Thread objects (VM internal JavaThreads,
4314 // jvmti agent threads, and JNI attaching threads  are skipped)
4315 // See CR 6404306 regarding JNI attaching threads
4316 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4317   ResourceMark rm(THREAD);
4318   ThreadsListEnumerator tle(THREAD, false, false);
4319   JvmtiVMObjectAllocEventCollector oam;
4320 
4321   int num_threads = tle.num_threads();
4322   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4323   objArrayHandle threads_ah(THREAD, r);
4324 
4325   for (int i = 0; i < num_threads; i++) {
4326     Handle h = tle.get_threadObj(i);
4327     threads_ah->obj_at_put(i, h());
4328   }
4329 
4330   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4331 JVM_END
4332 
4333 
4334 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4335 // Return StackTraceElement[][], each element is the stack trace of a thread in
4336 // the corresponding entry in the given threads array
4337 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4338   JVMWrapper("JVM_DumpThreads");
4339   JvmtiVMObjectAllocEventCollector oam;
4340 
4341   // Check if threads is null
4342   if (threads == NULL) {
4343     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4344   }
4345 
4346   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4347   objArrayHandle ah(THREAD, a);
4348   int num_threads = ah->length();
4349   // check if threads is non-empty array
4350   if (num_threads == 0) {
4351     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4352   }
4353 
4354   // check if threads is not an array of objects of Thread class
4355   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4356   if (k != SystemDictionary::Thread_klass()) {
4357     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4358   }
4359 
4360   ResourceMark rm(THREAD);
4361 
4362   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4363   for (int i = 0; i < num_threads; i++) {
4364     oop thread_obj = ah->obj_at(i);
4365     instanceHandle h(THREAD, (instanceOop) thread_obj);
4366     thread_handle_array->append(h);
4367   }
4368 
4369   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4370   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4371 
4372 JVM_END
4373 
4374 // JVM monitoring and management support
4375 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4376   return Management::get_jmm_interface(version);
4377 JVM_END
4378 
4379 // com.sun.tools.attach.VirtualMachine agent properties support
4380 //
4381 // Initialize the agent properties with the properties maintained in the VM
4382 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4383   JVMWrapper("JVM_InitAgentProperties");
4384   ResourceMark rm;
4385 
4386   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4387 
4388   PUTPROP(props, "sun.java.command", Arguments::java_command());
4389   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4390   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4391   return properties;
4392 JVM_END
4393 
4394 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4395 {
4396   JVMWrapper("JVM_GetEnclosingMethodInfo");
4397   JvmtiVMObjectAllocEventCollector oam;
4398 
4399   if (ofClass == NULL) {
4400     return NULL;
4401   }
4402   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4403   // Special handling for primitive objects
4404   if (java_lang_Class::is_primitive(mirror())) {
4405     return NULL;
4406   }
4407   Klass* k = java_lang_Class::as_Klass(mirror());
4408   if (!k->oop_is_instance()) {
4409     return NULL;
4410   }
4411   instanceKlassHandle ik_h(THREAD, k);
4412   int encl_method_class_idx = ik_h->enclosing_method_class_index();
4413   if (encl_method_class_idx == 0) {
4414     return NULL;
4415   }
4416   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4417   objArrayHandle dest(THREAD, dest_o);
4418   Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4419   dest->obj_at_put(0, enc_k->java_mirror());
4420   int encl_method_method_idx = ik_h->enclosing_method_method_index();
4421   if (encl_method_method_idx != 0) {
4422     Symbol* sym = ik_h->constants()->symbol_at(
4423                         extract_low_short_from_int(
4424                           ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4425     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4426     dest->obj_at_put(1, str());
4427     sym = ik_h->constants()->symbol_at(
4428               extract_high_short_from_int(
4429                 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4430     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4431     dest->obj_at_put(2, str());
4432   }
4433   return (jobjectArray) JNIHandles::make_local(dest());
4434 }
4435 JVM_END
4436 
4437 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4438                                               jint javaThreadState))
4439 {
4440   // If new thread states are added in future JDK and VM versions,
4441   // this should check if the JDK version is compatible with thread
4442   // states supported by the VM.  Return NULL if not compatible.
4443   //
4444   // This function must map the VM java_lang_Thread::ThreadStatus
4445   // to the Java thread state that the JDK supports.
4446   //
4447 
4448   typeArrayHandle values_h;
4449   switch (javaThreadState) {
4450     case JAVA_THREAD_STATE_NEW : {
4451       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4452       values_h = typeArrayHandle(THREAD, r);
4453       values_h->int_at_put(0, java_lang_Thread::NEW);
4454       break;
4455     }
4456     case JAVA_THREAD_STATE_RUNNABLE : {
4457       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4458       values_h = typeArrayHandle(THREAD, r);
4459       values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4460       break;
4461     }
4462     case JAVA_THREAD_STATE_BLOCKED : {
4463       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4464       values_h = typeArrayHandle(THREAD, r);
4465       values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4466       break;
4467     }
4468     case JAVA_THREAD_STATE_WAITING : {
4469       typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4470       values_h = typeArrayHandle(THREAD, r);
4471       values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4472       values_h->int_at_put(1, java_lang_Thread::PARKED);
4473       break;
4474     }
4475     case JAVA_THREAD_STATE_TIMED_WAITING : {
4476       typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4477       values_h = typeArrayHandle(THREAD, r);
4478       values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4479       values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4480       values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4481       break;
4482     }
4483     case JAVA_THREAD_STATE_TERMINATED : {
4484       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4485       values_h = typeArrayHandle(THREAD, r);
4486       values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4487       break;
4488     }
4489     default:
4490       // Unknown state - probably incompatible JDK version
4491       return NULL;
4492   }
4493 
4494   return (jintArray) JNIHandles::make_local(env, values_h());
4495 }
4496 JVM_END
4497 
4498 
4499 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4500                                                 jint javaThreadState,
4501                                                 jintArray values))
4502 {
4503   // If new thread states are added in future JDK and VM versions,
4504   // this should check if the JDK version is compatible with thread
4505   // states supported by the VM.  Return NULL if not compatible.
4506   //
4507   // This function must map the VM java_lang_Thread::ThreadStatus
4508   // to the Java thread state that the JDK supports.
4509   //
4510 
4511   ResourceMark rm;
4512 
4513   // Check if threads is null
4514   if (values == NULL) {
4515     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4516   }
4517 
4518   typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4519   typeArrayHandle values_h(THREAD, v);
4520 
4521   objArrayHandle names_h;
4522   switch (javaThreadState) {
4523     case JAVA_THREAD_STATE_NEW : {
4524       assert(values_h->length() == 1 &&
4525                values_h->int_at(0) == java_lang_Thread::NEW,
4526              "Invalid threadStatus value");
4527 
4528       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4529                                                1, /* only 1 substate */
4530                                                CHECK_NULL);
4531       names_h = objArrayHandle(THREAD, r);
4532       Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4533       names_h->obj_at_put(0, name());
4534       break;
4535     }
4536     case JAVA_THREAD_STATE_RUNNABLE : {
4537       assert(values_h->length() == 1 &&
4538                values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4539              "Invalid threadStatus value");
4540 
4541       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4542                                                1, /* only 1 substate */
4543                                                CHECK_NULL);
4544       names_h = objArrayHandle(THREAD, r);
4545       Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4546       names_h->obj_at_put(0, name());
4547       break;
4548     }
4549     case JAVA_THREAD_STATE_BLOCKED : {
4550       assert(values_h->length() == 1 &&
4551                values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4552              "Invalid threadStatus value");
4553 
4554       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4555                                                1, /* only 1 substate */
4556                                                CHECK_NULL);
4557       names_h = objArrayHandle(THREAD, r);
4558       Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4559       names_h->obj_at_put(0, name());
4560       break;
4561     }
4562     case JAVA_THREAD_STATE_WAITING : {
4563       assert(values_h->length() == 2 &&
4564                values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4565                values_h->int_at(1) == java_lang_Thread::PARKED,
4566              "Invalid threadStatus value");
4567       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4568                                                2, /* number of substates */
4569                                                CHECK_NULL);
4570       names_h = objArrayHandle(THREAD, r);
4571       Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4572                                                        CHECK_NULL);
4573       Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4574                                                        CHECK_NULL);
4575       names_h->obj_at_put(0, name0());
4576       names_h->obj_at_put(1, name1());
4577       break;
4578     }
4579     case JAVA_THREAD_STATE_TIMED_WAITING : {
4580       assert(values_h->length() == 3 &&
4581                values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4582                values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4583                values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4584              "Invalid threadStatus value");
4585       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4586                                                3, /* number of substates */
4587                                                CHECK_NULL);
4588       names_h = objArrayHandle(THREAD, r);
4589       Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4590                                                        CHECK_NULL);
4591       Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4592                                                        CHECK_NULL);
4593       Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4594                                                        CHECK_NULL);
4595       names_h->obj_at_put(0, name0());
4596       names_h->obj_at_put(1, name1());
4597       names_h->obj_at_put(2, name2());
4598       break;
4599     }
4600     case JAVA_THREAD_STATE_TERMINATED : {
4601       assert(values_h->length() == 1 &&
4602                values_h->int_at(0) == java_lang_Thread::TERMINATED,
4603              "Invalid threadStatus value");
4604       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4605                                                1, /* only 1 substate */
4606                                                CHECK_NULL);
4607       names_h = objArrayHandle(THREAD, r);
4608       Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4609       names_h->obj_at_put(0, name());
4610       break;
4611     }
4612     default:
4613       // Unknown state - probably incompatible JDK version
4614       return NULL;
4615   }
4616   return (jobjectArray) JNIHandles::make_local(env, names_h());
4617 }
4618 JVM_END
4619 
4620 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4621 {
4622   memset(info, 0, sizeof(info_size));
4623 
4624   info->jvm_version = Abstract_VM_Version::jvm_version();
4625   info->update_version = 0;          /* 0 in HotSpot Express VM */
4626   info->special_update_version = 0;  /* 0 in HotSpot Express VM */
4627 
4628   // when we add a new capability in the jvm_version_info struct, we should also
4629   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4630   // counter defined in runtimeService.cpp.
4631   info->is_attachable = AttachListener::is_attach_supported();
4632 }
4633 JVM_END