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