1 /*
   2  * Copyright (c) 1997, 2015, 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.inline.hpp"
  29 #include "classfile/stringTable.hpp"
  30 #include "classfile/systemDictionary.hpp"
  31 #include "classfile/vmSymbols.hpp"
  32 #include "gc_interface/collectedHeap.inline.hpp"
  33 #include "interpreter/bytecode.hpp"
  34 #include "memory/barrierSet.inline.hpp"
  35 #include "memory/oopFactory.hpp"
  36 #include "memory/universe.inline.hpp"
  37 #include "oops/fieldStreams.hpp"
  38 #include "oops/instanceKlass.hpp"
  39 #include "oops/objArrayKlass.hpp"
  40 #include "oops/objArrayOop.inline.hpp"
  41 #include "oops/method.hpp"
  42 #include "oops/oop.inline.hpp"
  43 #include "prims/jvm.h"
  44 #include "prims/jvm_misc.hpp"
  45 #include "prims/jvmtiExport.hpp"
  46 #include "prims/jvmtiThreadState.hpp"
  47 #include "prims/nativeLookup.hpp"
  48 #include "prims/privilegedStack.hpp"
  49 #include "runtime/arguments.hpp"
  50 #include "runtime/atomic.inline.hpp"
  51 #include "runtime/handles.inline.hpp"
  52 #include "runtime/init.hpp"
  53 #include "runtime/interfaceSupport.hpp"
  54 #include "runtime/java.hpp"
  55 #include "runtime/javaCalls.hpp"
  56 #include "runtime/jfieldIDWorkaround.hpp"
  57 #include "runtime/orderAccess.inline.hpp"
  58 #include "runtime/os.inline.hpp"
  59 #include "runtime/perfData.hpp"
  60 #include "runtime/reflection.hpp"
  61 #include "runtime/thread.inline.hpp"
  62 #include "runtime/vframe.hpp"
  63 #include "runtime/vm_operations.hpp"
  64 #include "runtime/vm_version.hpp"
  65 #include "services/attachListener.hpp"
  66 #include "services/management.hpp"
  67 #include "services/threadService.hpp"
  68 #include "trace/tracing.hpp"
  69 #include "utilities/copy.hpp"
  70 #include "utilities/defaultStream.hpp"
  71 #include "utilities/dtrace.hpp"
  72 #include "utilities/events.hpp"
  73 #include "utilities/histogram.hpp"
  74 #include "utilities/macros.hpp"
  75 #include "utilities/top.hpp"
  76 #include "utilities/utf8.hpp"
  77 #if INCLUDE_CDS
  78 #include "classfile/sharedClassUtil.hpp"
  79 #include "classfile/systemDictionaryShared.hpp"
  80 #endif
  81 #ifdef TARGET_OS_FAMILY_linux
  82 # include "jvm_linux.h"
  83 #endif
  84 #ifdef TARGET_OS_FAMILY_solaris
  85 # include "jvm_solaris.h"
  86 #endif
  87 #ifdef TARGET_OS_FAMILY_windows
  88 # include "jvm_windows.h"
  89 #endif
  90 #ifdef TARGET_OS_FAMILY_aix
  91 # include "jvm_aix.h"
  92 #endif
  93 #ifdef TARGET_OS_FAMILY_bsd
  94 # include "jvm_bsd.h"
  95 #endif
  96 
  97 #include <errno.h>
  98 
  99 /*
 100   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
 101   such ctors and calls MUST NOT come between an oop declaration/init and its
 102   usage because if objects are move this may cause various memory stomps, bus
 103   errors and segfaults. Here is a cookbook for causing so called "naked oop
 104   failures":
 105 
 106       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
 107           JVMWrapper("JVM_GetClassDeclaredFields");
 108 
 109           // Object address to be held directly in mirror & not visible to GC
 110           oop mirror = JNIHandles::resolve_non_null(ofClass);
 111 
 112           // If this ctor can hit a safepoint, moving objects around, then
 113           ComplexConstructor foo;
 114 
 115           // Boom! mirror may point to JUNK instead of the intended object
 116           (some dereference of mirror)
 117 
 118           // Here's another call that may block for GC, making mirror stale
 119           MutexLocker ml(some_lock);
 120 
 121           // And here's an initializer that can result in a stale oop
 122           // all in one step.
 123           oop o = call_that_can_throw_exception(TRAPS);
 124 
 125 
 126   The solution is to keep the oop declaration BELOW the ctor or function
 127   call that might cause a GC, do another resolve to reassign the oop, or
 128   consider use of a Handle instead of an oop so there is immunity from object
 129   motion. But note that the "QUICK" entries below do not have a handlemark
 130   and thus can only support use of handles passed in.
 131 */
 132 
 133 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
 134   ResourceMark rm;
 135   int line_number = -1;
 136   const char * source_file = NULL;
 137   const char * trace = "explicit";
 138   InstanceKlass* caller = NULL;
 139   JavaThread* jthread = JavaThread::current();
 140   if (jthread->has_last_Java_frame()) {
 141     vframeStream vfst(jthread);
 142 
 143     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
 144     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
 145     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
 146     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
 147     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
 148 
 149     Method* last_caller = NULL;
 150 
 151     while (!vfst.at_end()) {
 152       Method* m = vfst.method();
 153       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
 154           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
 155           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
 156         break;
 157       }
 158       last_caller = m;
 159       vfst.next();
 160     }
 161     // if this is called from Class.forName0 and that is called from Class.forName,
 162     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 163     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 164     bool found_it = false;
 165     if (!vfst.at_end() &&
 166         vfst.method()->method_holder()->name()->equals(vmSymbols::java_lang_Class()) &&
 167         vfst.method()->name()->equals(vmSymbols::forName0_name())) {
 168       vfst.next();
 169       if (!vfst.at_end() &&
 170           vfst.method()->method_holder()->name()->equals(vmSymbols::java_lang_Class()) &&
 171           vfst.method()->name()->equals(vmSymbols::forName_name())) {
 172         vfst.next();
 173         found_it = true;
 174       }
 175     } else if (last_caller != NULL &&
 176                last_caller->method_holder()->name()->equals(
 177                vmSymbols::java_lang_ClassLoader()) &&
 178                (last_caller->name()->equals(vmSymbols::loadClassInternal_name()) ||
 179                 last_caller->name()->equals(vmSymbols::loadClass_name()))) {
 180       found_it = true;
 181     } else if (!vfst.at_end()) {
 182       if (vfst.method()->is_native()) {
 183         // JNI call
 184         found_it = true;
 185       }
 186     }
 187     if (found_it && !vfst.at_end()) {
 188       // found the caller
 189       caller = vfst.method()->method_holder();
 190       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 191       if (line_number == -1) {
 192         // show method name if it's a native method
 193         trace = vfst.method()->name_and_sig_as_C_string();
 194       }
 195       Symbol* s = caller->source_file_name();
 196       if (s != NULL) {
 197         source_file = s->as_C_string();
 198       }
 199     }
 200   }
 201   if (caller != NULL) {
 202     if (to_class != caller) {
 203       const char * from = caller->external_name();
 204       const char * to = to_class->external_name();
 205       // print in a single call to reduce interleaving between threads
 206       if (source_file != NULL) {
 207         tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
 208       } else {
 209         tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
 210       }
 211     }
 212   }
 213 }
 214 
 215 void trace_class_resolution(Klass* to_class) {
 216   EXCEPTION_MARK;
 217   trace_class_resolution_impl(to_class, THREAD);
 218   if (HAS_PENDING_EXCEPTION) {
 219     CLEAR_PENDING_EXCEPTION;
 220   }
 221 }
 222 
 223 // Wrapper to trace JVM functions
 224 
 225 #ifdef ASSERT
 226   class JVMTraceWrapper : public StackObj {
 227    public:
 228     JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
 229       if (TraceJVMCalls) {
 230         va_list ap;
 231         va_start(ap, format);
 232         tty->print("JVM ");
 233         tty->vprint_cr(format, ap);
 234         va_end(ap);
 235       }
 236     }
 237   };
 238 
 239   Histogram* JVMHistogram;
 240   volatile jint JVMHistogram_lock = 0;
 241 
 242   class JVMHistogramElement : public HistogramElement {
 243     public:
 244      JVMHistogramElement(const char* name);
 245   };
 246 
 247   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
 248     _name = elementName;
 249     uintx count = 0;
 250 
 251     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
 252       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
 253         count +=1;
 254         if ( (WarnOnStalledSpinLock > 0)
 255           && (count % WarnOnStalledSpinLock == 0)) {
 256           warning("JVMHistogram_lock seems to be stalled");
 257         }
 258       }
 259      }
 260 
 261     if(JVMHistogram == NULL)
 262       JVMHistogram = new Histogram("JVM Call Counts",100);
 263 
 264     JVMHistogram->add_element(this);
 265     Atomic::dec(&JVMHistogram_lock);
 266   }
 267 
 268   #define JVMCountWrapper(arg) \
 269       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
 270       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
 271 
 272   #define JVMWrapper(arg1)                    JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
 273   #define JVMWrapper2(arg1, arg2)             JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
 274   #define JVMWrapper3(arg1, arg2, arg3)       JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
 275   #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
 276 #else
 277   #define JVMWrapper(arg1)
 278   #define JVMWrapper2(arg1, arg2)
 279   #define JVMWrapper3(arg1, arg2, arg3)
 280   #define JVMWrapper4(arg1, arg2, arg3, arg4)
 281 #endif
 282 
 283 
 284 // Interface version /////////////////////////////////////////////////////////////////////
 285 
 286 
 287 JVM_LEAF(jint, JVM_GetInterfaceVersion())
 288   return JVM_INTERFACE_VERSION;
 289 JVM_END
 290 
 291 
 292 // java.lang.System //////////////////////////////////////////////////////////////////////
 293 
 294 
 295 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 296   JVMWrapper("JVM_CurrentTimeMillis");
 297   return os::javaTimeMillis();
 298 JVM_END
 299 
 300 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
 301   JVMWrapper("JVM_NanoTime");
 302   return os::javaTimeNanos();
 303 JVM_END
 304 
 305 // The function below is actually exposed by sun.misc.VM and not
 306 // java.lang.System, but we choose to keep it here so that it stays next
 307 // to JVM_CurrentTimeMillis and JVM_NanoTime
 308 
 309 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); //  2^32
 310 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
 311 
 312 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
 313   JVMWrapper("JVM_GetNanoTimeAdjustment");
 314   jlong seconds;
 315   jlong nanos;
 316 
 317   os::javaTimeSystemUTC(seconds, nanos);
 318 
 319   // We're going to verify that the result can fit in a long.
 320   // For that we need the difference in seconds between 'seconds'
 321   // and 'offset_secs' to be such that:
 322   //     |seconds - offset_secs| < (2^63/10^9)
 323   // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
 324   // which makes |seconds - offset_secs| < 2^33
 325   // and we will prefer +/- 2^32 as the maximum acceptable diff
 326   // as 2^32 has a more natural feel than 2^33...
 327   //
 328   // So if |seconds - offset_secs| >= 2^32 - we return a special
 329   // sentinel value (-1) which the caller should take as an
 330   // exception value indicating that the offset given to us is
 331   // too far from range of the current time - leading to too big
 332   // a nano adjustment. The caller is expected to recover by
 333   // computing a more accurate offset and calling this method
 334   // again. (For the record 2^32 secs is ~136 years, so that
 335   // should rarely happen)
 336   //
 337   jlong diff = seconds - offset_secs;
 338   if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
 339      return -1; // sentinel value: the offset is too far off the target
 340   }
 341 
 342   // return the adjustment. If you compute a time by adding
 343   // this number of nanoseconds along with the number of seconds
 344   // in the offset you should get the current UTC time.
 345   return (diff * (jlong)1000000000) + nanos;
 346 JVM_END
 347 
 348 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 349                                jobject dst, jint dst_pos, jint length))
 350   JVMWrapper("JVM_ArrayCopy");
 351   // Check if we have null pointers
 352   if (src == NULL || dst == NULL) {
 353     THROW(vmSymbols::java_lang_NullPointerException());
 354   }
 355   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 356   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 357   assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
 358   assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
 359   // Do copy
 360   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 361 JVM_END
 362 
 363 
 364 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 365   JavaValue r(T_OBJECT);
 366   // public synchronized Object put(Object key, Object value);
 367   HandleMark hm(THREAD);
 368   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 369   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
 370   JavaCalls::call_virtual(&r,
 371                           props,
 372                           KlassHandle(THREAD, SystemDictionary::Properties_klass()),
 373                           vmSymbols::put_name(),
 374                           vmSymbols::object_object_object_signature(),
 375                           key_str,
 376                           value_str,
 377                           THREAD);
 378 }
 379 
 380 
 381 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 382 
 383 
 384 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
 385   JVMWrapper("JVM_InitProperties");
 386   ResourceMark rm;
 387 
 388   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
 389 
 390   // System property list includes both user set via -D option and
 391   // jvm system specific properties.
 392   for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
 393     PUTPROP(props, p->key(), p->value());
 394   }
 395 
 396   // Convert the -XX:MaxDirectMemorySize= command line flag
 397   // to the sun.nio.MaxDirectMemorySize property.
 398   // Do this after setting user properties to prevent people
 399   // from setting the value with a -D option, as requested.
 400   {
 401     if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 402       PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
 403     } else {
 404       char as_chars[256];
 405       jio_snprintf(as_chars, sizeof(as_chars), SIZE_FORMAT, MaxDirectMemorySize);
 406       PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
 407     }
 408   }
 409 
 410   // JVM monitoring and management support
 411   // Add the sun.management.compiler property for the compiler's name
 412   {
 413 #undef CSIZE
 414 #if defined(_LP64) || defined(_WIN64)
 415   #define CSIZE "64-Bit "
 416 #else
 417   #define CSIZE
 418 #endif // 64bit
 419 
 420 #ifdef TIERED
 421     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 422 #else
 423 #if defined(COMPILER1)
 424     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 425 #elif defined(COMPILER2)
 426     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 427 #else
 428     const char* compiler_name = "";
 429 #endif // compilers
 430 #endif // TIERED
 431 
 432     if (*compiler_name != '\0' &&
 433         (Arguments::mode() != Arguments::_int)) {
 434       PUTPROP(props, "sun.management.compiler", compiler_name);
 435     }
 436   }
 437 
 438   return properties;
 439 JVM_END
 440 
 441 
 442 /*
 443  * Return the temporary directory that the VM uses for the attach
 444  * and perf data files.
 445  *
 446  * It is important that this directory is well-known and the
 447  * same for all VM instances. It cannot be affected by configuration
 448  * variables such as java.io.tmpdir.
 449  */
 450 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
 451   JVMWrapper("JVM_GetTemporaryDirectory");
 452   HandleMark hm(THREAD);
 453   const char* temp_dir = os::get_temp_directory();
 454   Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
 455   return (jstring) JNIHandles::make_local(env, h());
 456 JVM_END
 457 
 458 
 459 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 460 
 461 extern volatile jint vm_created;
 462 
 463 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
 464   before_exit(thread);
 465   vm_exit(code);
 466 JVM_END
 467 
 468 
 469 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
 470   JVMWrapper("JVM_GC");
 471   if (!DisableExplicitGC) {
 472     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 473   }
 474 JVM_END
 475 
 476 
 477 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
 478   JVMWrapper("JVM_MaxObjectInspectionAge");
 479   return Universe::heap()->millis_since_last_gc();
 480 JVM_END
 481 
 482 
 483 static inline jlong convert_size_t_to_jlong(size_t val) {
 484   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 485   NOT_LP64 (return (jlong)val;)
 486   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 487 }
 488 
 489 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
 490   JVMWrapper("JVM_TotalMemory");
 491   size_t n = Universe::heap()->capacity();
 492   return convert_size_t_to_jlong(n);
 493 JVM_END
 494 
 495 
 496 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
 497   JVMWrapper("JVM_FreeMemory");
 498   CollectedHeap* ch = Universe::heap();
 499   size_t n;
 500   {
 501      MutexLocker x(Heap_lock);
 502      n = ch->capacity() - ch->used();
 503   }
 504   return convert_size_t_to_jlong(n);
 505 JVM_END
 506 
 507 
 508 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
 509   JVMWrapper("JVM_MaxMemory");
 510   size_t n = Universe::heap()->max_capacity();
 511   return convert_size_t_to_jlong(n);
 512 JVM_END
 513 
 514 
 515 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
 516   JVMWrapper("JVM_ActiveProcessorCount");
 517   return os::active_processor_count();
 518 JVM_END
 519 
 520 
 521 
 522 // java.lang.Throwable //////////////////////////////////////////////////////
 523 
 524 
 525 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
 526   JVMWrapper("JVM_FillInStackTrace");
 527   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
 528   java_lang_Throwable::fill_in_stack_trace(exception);
 529 JVM_END
 530 
 531 
 532 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
 533   JVMWrapper("JVM_GetStackTraceDepth");
 534   oop exception = JNIHandles::resolve(throwable);
 535   return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
 536 JVM_END
 537 
 538 
 539 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
 540   JVMWrapper("JVM_GetStackTraceElement");
 541   JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
 542   oop exception = JNIHandles::resolve(throwable);
 543   oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
 544   return JNIHandles::make_local(env, element);
 545 JVM_END
 546 
 547 
 548 // java.lang.Object ///////////////////////////////////////////////
 549 
 550 
 551 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 552   JVMWrapper("JVM_IHashCode");
 553   // as implemented in the classic virtual machine; return 0 if object is NULL
 554   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 555 JVM_END
 556 
 557 
 558 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 559   JVMWrapper("JVM_MonitorWait");
 560   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 561   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 562   if (JvmtiExport::should_post_monitor_wait()) {
 563     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 564 
 565     // The current thread already owns the monitor and it has not yet
 566     // been added to the wait queue so the current thread cannot be
 567     // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
 568     // event handler cannot accidentally consume an unpark() meant for
 569     // the ParkEvent associated with this ObjectMonitor.
 570   }
 571   ObjectSynchronizer::wait(obj, ms, CHECK);
 572 JVM_END
 573 
 574 
 575 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 576   JVMWrapper("JVM_MonitorNotify");
 577   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 578   ObjectSynchronizer::notify(obj, CHECK);
 579 JVM_END
 580 
 581 
 582 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 583   JVMWrapper("JVM_MonitorNotifyAll");
 584   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 585   ObjectSynchronizer::notifyall(obj, CHECK);
 586 JVM_END
 587 
 588 
 589 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 590   JVMWrapper("JVM_Clone");
 591   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 592   const KlassHandle klass (THREAD, obj->klass());
 593   JvmtiVMObjectAllocEventCollector oam;
 594 
 595 #ifdef ASSERT
 596   // Just checking that the cloneable flag is set correct
 597   if (obj->is_array()) {
 598     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 599   } else {
 600     guarantee(obj->is_instance(), "should be instanceOop");
 601     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 602     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 603   }
 604 #endif
 605 
 606   // Check if class of obj supports the Cloneable interface.
 607   // All arrays are considered to be cloneable (See JLS 20.1.5)
 608   if (!klass->is_cloneable()) {
 609     ResourceMark rm(THREAD);
 610     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 611   }
 612 
 613   // Make shallow object copy
 614   const int size = obj->size();
 615   oop new_obj_oop = NULL;
 616   if (obj->is_array()) {
 617     const int length = ((arrayOop)obj())->length();
 618     new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
 619   } else {
 620     new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
 621   }
 622 
 623   // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
 624   // is modifying a reference field in the clonee, a non-oop-atomic copy might
 625   // be suspended in the middle of copying the pointer and end up with parts
 626   // of two different pointers in the field.  Subsequent dereferences will crash.
 627   // 4846409: an oop-copy of objects with long or double fields or arrays of same
 628   // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
 629   // of oops.  We know objects are aligned on a minimum of an jlong boundary.
 630   // The same is true of StubRoutines::object_copy and the various oop_copy
 631   // variants, and of the code generated by the inline_native_clone intrinsic.
 632   assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
 633   Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
 634                                (size_t)align_object_size(size) / HeapWordsPerLong);
 635   // Clear the header
 636   new_obj_oop->init_mark();
 637 
 638   // Store check (mark entire object and let gc sort it out)
 639   BarrierSet* bs = Universe::heap()->barrier_set();
 640   assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
 641   bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
 642 
 643   Handle new_obj(THREAD, new_obj_oop);
 644   // Special handling for MemberNames.  Since they contain Method* metadata, they
 645   // must be registered so that RedefineClasses can fix metadata contained in them.
 646   if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
 647       java_lang_invoke_MemberName::is_method(new_obj())) {
 648     Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
 649     // MemberName may be unresolved, so doesn't need registration until resolved.
 650     if (method != NULL) {
 651       methodHandle m(THREAD, method);
 652       // This can safepoint and redefine method, so need both new_obj and method
 653       // in a handle, for two different reasons.  new_obj can move, method can be
 654       // deleted if nothing is using it on the stack.
 655       m->method_holder()->add_member_name(new_obj());
 656     }
 657   }
 658 
 659   // Caution: this involves a java upcall, so the clone should be
 660   // "gc-robust" by this stage.
 661   if (klass->has_finalizer()) {
 662     assert(obj->is_instance(), "should be instanceOop");
 663     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
 664     new_obj = Handle(THREAD, new_obj_oop);
 665   }
 666 
 667   return JNIHandles::make_local(env, new_obj());
 668 JVM_END
 669 
 670 // java.io.File ///////////////////////////////////////////////////////////////
 671 
 672 JVM_LEAF(char*, JVM_NativePath(char* path))
 673   JVMWrapper2("JVM_NativePath (%s)", path);
 674   return os::native_path(path);
 675 JVM_END
 676 
 677 
 678 // Misc. class handling ///////////////////////////////////////////////////////////
 679 
 680 
 681 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
 682   JVMWrapper("JVM_GetCallerClass");
 683 
 684   // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
 685   // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
 686   // temporarily for existing code to use until a replacement API is defined.
 687   if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
 688     Klass* k = thread->security_get_caller_class(depth);
 689     return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
 690   }
 691 
 692   // Getting the class of the caller frame.
 693   //
 694   // The call stack at this point looks something like this:
 695   //
 696   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 697   // [1] [ @CallerSensitive API.method                                   ]
 698   // [.] [ (skipped intermediate frames)                                 ]
 699   // [n] [ caller                                                        ]
 700   vframeStream vfst(thread);
 701   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 702   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 703     Method* m = vfst.method();
 704     assert(m != NULL, "sanity");
 705     switch (n) {
 706     case 0:
 707       // This must only be called from Reflection.getCallerClass
 708       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 709         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 710       }
 711       // fall-through
 712     case 1:
 713       // Frame 0 and 1 must be caller sensitive.
 714       if (!m->caller_sensitive()) {
 715         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 716       }
 717       break;
 718     default:
 719       if (!m->is_ignored_by_security_stack_walk()) {
 720         // We have reached the desired frame; return the holder class.
 721         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 722       }
 723       break;
 724     }
 725   }
 726   return NULL;
 727 JVM_END
 728 
 729 
 730 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 731   JVMWrapper("JVM_FindPrimitiveClass");
 732   oop mirror = NULL;
 733   BasicType t = name2type(utf);
 734   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
 735     mirror = Universe::java_mirror(t);
 736   }
 737   if (mirror == NULL) {
 738     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 739   } else {
 740     return (jclass) JNIHandles::make_local(env, mirror);
 741   }
 742 JVM_END
 743 
 744 
 745 // Returns a class loaded by the bootstrap class loader; or null
 746 // if not found.  ClassNotFoundException is not thrown.
 747 // FindClassFromBootLoader is exported to the launcher for windows.
 748 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 749                                               const char* name))
 750   JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
 751 
 752   // Java libraries should ensure that name is never null...
 753   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 754     // It's impossible to create this class;  the name cannot fit
 755     // into the constant pool.
 756     return NULL;
 757   }
 758 
 759   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 760   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 761   if (k == NULL) {
 762     return NULL;
 763   }
 764 
 765   if (TraceClassResolution) {
 766     trace_class_resolution(k);
 767   }
 768   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 769 JVM_END
 770 
 771 // Find a class with this name in this loader, using the caller's protection domain.
 772 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
 773                                           jboolean init, jobject loader,
 774                                           jclass caller))
 775   JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
 776   // Java libraries should ensure that name is never null...
 777   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 778     // It's impossible to create this class;  the name cannot fit
 779     // into the constant pool.
 780     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 781   }
 782 
 783   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 784 
 785   oop loader_oop = JNIHandles::resolve(loader);
 786   oop from_class = JNIHandles::resolve(caller);
 787   oop protection_domain = NULL;
 788   // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
 789   // NPE. Put it in another way, the bootstrap class loader has all permission and
 790   // thus no checkPackageAccess equivalence in the VM class loader.
 791   // The caller is also passed as NULL by the java code if there is no security
 792   // manager to avoid the performance cost of getting the calling class.
 793   if (from_class != NULL && loader_oop != NULL) {
 794     protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
 795   }
 796 
 797   Handle h_loader(THREAD, loader_oop);
 798   Handle h_prot(THREAD, protection_domain);
 799   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 800                                                h_prot, false, THREAD);
 801 
 802   if (TraceClassResolution && result != NULL) {
 803     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 804   }
 805   return result;
 806 JVM_END
 807 
 808 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 809                                          jboolean init, jclass from))
 810   JVMWrapper2("JVM_FindClassFromClass %s", name);
 811   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 812     // It's impossible to create this class;  the name cannot fit
 813     // into the constant pool.
 814     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 815   }
 816   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 817   oop from_class_oop = JNIHandles::resolve(from);
 818   Klass* from_class = (from_class_oop == NULL)
 819                            ? (Klass*)NULL
 820                            : java_lang_Class::as_Klass(from_class_oop);
 821   oop class_loader = NULL;
 822   oop protection_domain = NULL;
 823   if (from_class != NULL) {
 824     class_loader = from_class->class_loader();
 825     protection_domain = from_class->protection_domain();
 826   }
 827   Handle h_loader(THREAD, class_loader);
 828   Handle h_prot  (THREAD, protection_domain);
 829   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 830                                                h_prot, true, thread);
 831 
 832   if (TraceClassResolution && result != NULL) {
 833     // this function is generally only used for class loading during verification.
 834     ResourceMark rm;
 835     oop from_mirror = JNIHandles::resolve_non_null(from);
 836     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 837     const char * from_name = from_class->external_name();
 838 
 839     oop mirror = JNIHandles::resolve_non_null(result);
 840     Klass* to_class = java_lang_Class::as_Klass(mirror);
 841     const char * to = to_class->external_name();
 842     tty->print("RESOLVE %s %s (verification)\n", from_name, to);
 843   }
 844 
 845   return result;
 846 JVM_END
 847 
 848 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 849   if (loader.is_null()) {
 850     return;
 851   }
 852 
 853   // check whether the current caller thread holds the lock or not.
 854   // If not, increment the corresponding counter
 855   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 856       ObjectSynchronizer::owner_self) {
 857     counter->inc();
 858   }
 859 }
 860 
 861 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 862 // and JVM_DefineClassWithSourceCond()
 863 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 864                                       jobject loader, const jbyte *buf,
 865                                       jsize len, jobject pd, const char *source,
 866                                       jboolean verify, TRAPS) {
 867   if (source == NULL)  source = "__JVM_DefineClass__";
 868 
 869   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 870   JavaThread* jt = (JavaThread*) THREAD;
 871 
 872   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 873                              ClassLoader::perf_define_appclass_selftime(),
 874                              ClassLoader::perf_define_appclasses(),
 875                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 876                              jt->get_thread_stat()->perf_timers_addr(),
 877                              PerfClassTraceTime::DEFINE_CLASS);
 878 
 879   if (UsePerfData) {
 880     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 881   }
 882 
 883   // Since exceptions can be thrown, class initialization can take place
 884   // if name is NULL no check for class name in .class stream has to be made.
 885   TempNewSymbol class_name = NULL;
 886   if (name != NULL) {
 887     const int str_len = (int)strlen(name);
 888     if (str_len > Symbol::max_length()) {
 889       // It's impossible to create this class;  the name cannot fit
 890       // into the constant pool.
 891       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 892     }
 893     class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
 894   }
 895 
 896   ResourceMark rm(THREAD);
 897   ClassFileStream st((u1*) buf, len, (char *)source);
 898   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 899   if (UsePerfData) {
 900     is_lock_held_by_thread(class_loader,
 901                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
 902                            THREAD);
 903   }
 904   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 905   Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
 906                                                      protection_domain, &st,
 907                                                      verify != 0,
 908                                                      CHECK_NULL);
 909 
 910   if (TraceClassResolution && k != NULL) {
 911     trace_class_resolution(k);
 912   }
 913 
 914   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 915 }
 916 
 917 
 918 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
 919   JVMWrapper2("JVM_DefineClass %s", name);
 920 
 921   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
 922 JVM_END
 923 
 924 
 925 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
 926   JVMWrapper2("JVM_DefineClassWithSource %s", name);
 927 
 928   return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
 929 JVM_END
 930 
 931 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
 932                                                 jobject loader, const jbyte *buf,
 933                                                 jsize len, jobject pd,
 934                                                 const char *source, jboolean verify))
 935   JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
 936 
 937   return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
 938 JVM_END
 939 
 940 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
 941   JVMWrapper("JVM_FindLoadedClass");
 942   ResourceMark rm(THREAD);
 943 
 944   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
 945   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
 946 
 947   const char* str   = java_lang_String::as_utf8_string(string());
 948   // Sanity check, don't expect null
 949   if (str == NULL) return NULL;
 950 
 951   const int str_len = (int)strlen(str);
 952   if (str_len > Symbol::max_length()) {
 953     // It's impossible to create this class;  the name cannot fit
 954     // into the constant pool.
 955     return NULL;
 956   }
 957   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
 958 
 959   // Security Note:
 960   //   The Java level wrapper will perform the necessary security check allowing
 961   //   us to pass the NULL as the initiating class loader.
 962   Handle h_loader(THREAD, JNIHandles::resolve(loader));
 963   if (UsePerfData) {
 964     is_lock_held_by_thread(h_loader,
 965                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
 966                            THREAD);
 967   }
 968 
 969   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
 970                                                               h_loader,
 971                                                               Handle(),
 972                                                               CHECK_NULL);
 973 #if INCLUDE_CDS
 974   if (k == NULL) {
 975     // If the class is not already loaded, try to see if it's in the shared
 976     // archive for the current classloader (h_loader).
 977     instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
 978         klass_name, h_loader, CHECK_NULL);
 979     k = ik();
 980   }
 981 #endif
 982   return (k == NULL) ? NULL :
 983             (jclass) JNIHandles::make_local(env, k->java_mirror());
 984 JVM_END
 985 
 986 
 987 // Reflection support //////////////////////////////////////////////////////////////////////////////
 988 
 989 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
 990   assert (cls != NULL, "illegal class");
 991   JVMWrapper("JVM_GetClassName");
 992   JvmtiVMObjectAllocEventCollector oam;
 993   ResourceMark rm(THREAD);
 994   const char* name;
 995   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
 996     name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
 997   } else {
 998     // Consider caching interned string in Klass
 999     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1000     assert(k->is_klass(), "just checking");
1001     name = k->external_name();
1002   }
1003   oop result = StringTable::intern((char*) name, CHECK_NULL);
1004   return (jstring) JNIHandles::make_local(env, result);
1005 JVM_END
1006 
1007 
1008 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1009   JVMWrapper("JVM_GetClassInterfaces");
1010   JvmtiVMObjectAllocEventCollector oam;
1011   oop mirror = JNIHandles::resolve_non_null(cls);
1012 
1013   // Special handling for primitive objects
1014   if (java_lang_Class::is_primitive(mirror)) {
1015     // Primitive objects does not have any interfaces
1016     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1017     return (jobjectArray) JNIHandles::make_local(env, r);
1018   }
1019 
1020   KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1021   // Figure size of result array
1022   int size;
1023   if (klass->oop_is_instance()) {
1024     size = InstanceKlass::cast(klass())->local_interfaces()->length();
1025   } else {
1026     assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1027     size = 2;
1028   }
1029 
1030   // Allocate result array
1031   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1032   objArrayHandle result (THREAD, r);
1033   // Fill in result
1034   if (klass->oop_is_instance()) {
1035     // Regular instance klass, fill in all local interfaces
1036     for (int index = 0; index < size; index++) {
1037       Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1038       result->obj_at_put(index, k->java_mirror());
1039     }
1040   } else {
1041     // All arrays implement java.lang.Cloneable and java.io.Serializable
1042     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1043     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1044   }
1045   return (jobjectArray) JNIHandles::make_local(env, result());
1046 JVM_END
1047 
1048 
1049 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1050   JVMWrapper("JVM_IsInterface");
1051   oop mirror = JNIHandles::resolve_non_null(cls);
1052   if (java_lang_Class::is_primitive(mirror)) {
1053     return JNI_FALSE;
1054   }
1055   Klass* k = java_lang_Class::as_Klass(mirror);
1056   jboolean result = k->is_interface();
1057   assert(!result || k->oop_is_instance(),
1058          "all interfaces are instance types");
1059   // The compiler intrinsic for isInterface tests the
1060   // Klass::_access_flags bits in the same way.
1061   return result;
1062 JVM_END
1063 
1064 
1065 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1066   JVMWrapper("JVM_GetClassSigners");
1067   JvmtiVMObjectAllocEventCollector oam;
1068   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1069     // There are no signers for primitive types
1070     return NULL;
1071   }
1072 
1073   objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1074 
1075   // If there are no signers set in the class, or if the class
1076   // is an array, return NULL.
1077   if (signers == NULL) return NULL;
1078 
1079   // copy of the signers array
1080   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1081   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1082   for (int index = 0; index < signers->length(); index++) {
1083     signers_copy->obj_at_put(index, signers->obj_at(index));
1084   }
1085 
1086   // return the copy
1087   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1088 JVM_END
1089 
1090 
1091 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1092   JVMWrapper("JVM_SetClassSigners");
1093   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1094     // This call is ignored for primitive types and arrays.
1095     // Signers are only set once, ClassLoader.java, and thus shouldn't
1096     // be called with an array.  Only the bootstrap loader creates arrays.
1097     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1098     if (k->oop_is_instance()) {
1099       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1100     }
1101   }
1102 JVM_END
1103 
1104 
1105 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1106   JVMWrapper("JVM_GetProtectionDomain");
1107   if (JNIHandles::resolve(cls) == NULL) {
1108     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1109   }
1110 
1111   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1112     // Primitive types does not have a protection domain.
1113     return NULL;
1114   }
1115 
1116   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1117   return (jobject) JNIHandles::make_local(env, pd);
1118 JVM_END
1119 
1120 
1121 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1122   // If there is a security manager and protection domain, check the access
1123   // in the protection domain, otherwise it is authorized.
1124   if (java_lang_System::has_security_manager()) {
1125 
1126     // For bootstrapping, if pd implies method isn't in the JDK, allow
1127     // this context to revert to older behavior.
1128     // In this case the isAuthorized field in AccessControlContext is also not
1129     // present.
1130     if (Universe::protection_domain_implies_method() == NULL) {
1131       return true;
1132     }
1133 
1134     // Whitelist certain access control contexts
1135     if (java_security_AccessControlContext::is_authorized(context)) {
1136       return true;
1137     }
1138 
1139     oop prot = klass->protection_domain();
1140     if (prot != NULL) {
1141       // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1142       // in the new wrapper.
1143       methodHandle m(THREAD, Universe::protection_domain_implies_method());
1144       Handle h_prot(THREAD, prot);
1145       JavaValue result(T_BOOLEAN);
1146       JavaCallArguments args(h_prot);
1147       JavaCalls::call(&result, m, &args, CHECK_false);
1148       return (result.get_jboolean() != 0);
1149     }
1150   }
1151   return true;
1152 }
1153 
1154 // Create an AccessControlContext with a protection domain with null codesource
1155 // and null permissions - which gives no permissions.
1156 oop create_dummy_access_control_context(TRAPS) {
1157   InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1158   Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1159   // Call constructor ProtectionDomain(null, null);
1160   JavaValue result(T_VOID);
1161   JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1162                           vmSymbols::object_initializer_name(),
1163                           vmSymbols::codesource_permissioncollection_signature(),
1164                           Handle(), Handle(), CHECK_NULL);
1165 
1166   // new ProtectionDomain[] {pd};
1167   objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1168   context->obj_at_put(0, obj());
1169 
1170   // new AccessControlContext(new ProtectionDomain[] {pd})
1171   objArrayHandle h_context(THREAD, context);
1172   oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1173   return acc;
1174 }
1175 
1176 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1177   JVMWrapper("JVM_DoPrivileged");
1178 
1179   if (action == NULL) {
1180     THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1181   }
1182 
1183   // Compute the frame initiating the do privileged operation and setup the privileged stack
1184   vframeStream vfst(thread);
1185   vfst.security_get_caller_frame(1);
1186 
1187   if (vfst.at_end()) {
1188     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1189   }
1190 
1191   Method* method        = vfst.method();
1192   instanceKlassHandle klass (THREAD, method->method_holder());
1193 
1194   // Check that action object understands "Object run()"
1195   Handle h_context;
1196   if (context != NULL) {
1197     h_context = Handle(THREAD, JNIHandles::resolve(context));
1198     bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1199     if (!authorized) {
1200       // Create an unprivileged access control object and call it's run function
1201       // instead.
1202       oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1203       h_context = Handle(THREAD, noprivs);
1204     }
1205   }
1206 
1207   // Check that action object understands "Object run()"
1208   Handle object (THREAD, JNIHandles::resolve(action));
1209 
1210   // get run() method
1211   Method* m_oop = object->klass()->uncached_lookup_method(
1212                                            vmSymbols::run_method_name(),
1213                                            vmSymbols::void_object_signature(),
1214                                            Klass::find_overpass);
1215   methodHandle m (THREAD, m_oop);
1216   if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1217     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1218   }
1219 
1220   // Stack allocated list of privileged stack elements
1221   PrivilegedElement pi;
1222   if (!vfst.at_end()) {
1223     pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1224     thread->set_privileged_stack_top(&pi);
1225   }
1226 
1227 
1228   // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1229   // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1230   Handle pending_exception;
1231   JavaValue result(T_OBJECT);
1232   JavaCallArguments args(object);
1233   JavaCalls::call(&result, m, &args, THREAD);
1234 
1235   // done with action, remove ourselves from the list
1236   if (!vfst.at_end()) {
1237     assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1238     thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1239   }
1240 
1241   if (HAS_PENDING_EXCEPTION) {
1242     pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1243     CLEAR_PENDING_EXCEPTION;
1244     // JVMTI has already reported the pending exception
1245     // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1246     if (THREAD->is_Java_thread()) {
1247       JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1248     }
1249     if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1250         !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1251       // Throw a java.security.PrivilegedActionException(Exception e) exception
1252       JavaCallArguments args(pending_exception);
1253       THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1254                   vmSymbols::exception_void_signature(),
1255                   &args);
1256     }
1257   }
1258 
1259   if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1260   return JNIHandles::make_local(env, (oop) result.get_jobject());
1261 JVM_END
1262 
1263 
1264 // Returns the inherited_access_control_context field of the running thread.
1265 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1266   JVMWrapper("JVM_GetInheritedAccessControlContext");
1267   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1268   return JNIHandles::make_local(env, result);
1269 JVM_END
1270 
1271 class RegisterArrayForGC {
1272  private:
1273   JavaThread *_thread;
1274  public:
1275   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1276     _thread = thread;
1277     _thread->register_array_for_gc(array);
1278   }
1279 
1280   ~RegisterArrayForGC() {
1281     _thread->register_array_for_gc(NULL);
1282   }
1283 };
1284 
1285 
1286 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1287   JVMWrapper("JVM_GetStackAccessControlContext");
1288   if (!UsePrivilegedStack) return NULL;
1289 
1290   ResourceMark rm(THREAD);
1291   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1292   JvmtiVMObjectAllocEventCollector oam;
1293 
1294   // count the protection domains on the execution stack. We collapse
1295   // duplicate consecutive protection domains into a single one, as
1296   // well as stopping when we hit a privileged frame.
1297 
1298   // Use vframeStream to iterate through Java frames
1299   vframeStream vfst(thread);
1300 
1301   oop previous_protection_domain = NULL;
1302   Handle privileged_context(thread, NULL);
1303   bool is_privileged = false;
1304   oop protection_domain = NULL;
1305 
1306   for(; !vfst.at_end(); vfst.next()) {
1307     // get method of frame
1308     Method* method = vfst.method();
1309     intptr_t* frame_id   = vfst.frame_id();
1310 
1311     // check the privileged frames to see if we have a match
1312     if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1313       // this frame is privileged
1314       is_privileged = true;
1315       privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1316       protection_domain  = thread->privileged_stack_top()->protection_domain();
1317     } else {
1318       protection_domain = method->method_holder()->protection_domain();
1319     }
1320 
1321     if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1322       local_array->push(protection_domain);
1323       previous_protection_domain = protection_domain;
1324     }
1325 
1326     if (is_privileged) break;
1327   }
1328 
1329 
1330   // either all the domains on the stack were system domains, or
1331   // we had a privileged system domain
1332   if (local_array->is_empty()) {
1333     if (is_privileged && privileged_context.is_null()) return NULL;
1334 
1335     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1336     return JNIHandles::make_local(env, result);
1337   }
1338 
1339   // the resource area must be registered in case of a gc
1340   RegisterArrayForGC ragc(thread, local_array);
1341   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1342                                                  local_array->length(), CHECK_NULL);
1343   objArrayHandle h_context(thread, context);
1344   for (int index = 0; index < local_array->length(); index++) {
1345     h_context->obj_at_put(index, local_array->at(index));
1346   }
1347 
1348   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1349 
1350   return JNIHandles::make_local(env, result);
1351 JVM_END
1352 
1353 
1354 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1355   JVMWrapper("JVM_IsArrayClass");
1356   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1357   return (k != NULL) && k->oop_is_array() ? true : false;
1358 JVM_END
1359 
1360 
1361 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1362   JVMWrapper("JVM_IsPrimitiveClass");
1363   oop mirror = JNIHandles::resolve_non_null(cls);
1364   return (jboolean) java_lang_Class::is_primitive(mirror);
1365 JVM_END
1366 
1367 
1368 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1369   JVMWrapper("JVM_GetClassModifiers");
1370   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1371     // Primitive type
1372     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1373   }
1374 
1375   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1376   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1377   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1378   return k->modifier_flags();
1379 JVM_END
1380 
1381 
1382 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1383 
1384 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1385   JvmtiVMObjectAllocEventCollector oam;
1386   // ofClass is a reference to a java_lang_Class object. The mirror object
1387   // of an InstanceKlass
1388 
1389   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1390       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1391     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1392     return (jobjectArray)JNIHandles::make_local(env, result);
1393   }
1394 
1395   instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1396   InnerClassesIterator iter(k);
1397 
1398   if (iter.length() == 0) {
1399     // Neither an inner nor outer class
1400     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1401     return (jobjectArray)JNIHandles::make_local(env, result);
1402   }
1403 
1404   // find inner class info
1405   constantPoolHandle cp(thread, k->constants());
1406   int length = iter.length();
1407 
1408   // Allocate temp. result array
1409   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1410   objArrayHandle result (THREAD, r);
1411   int members = 0;
1412 
1413   for (; !iter.done(); iter.next()) {
1414     int ioff = iter.inner_class_info_index();
1415     int ooff = iter.outer_class_info_index();
1416 
1417     if (ioff != 0 && ooff != 0) {
1418       // Check to see if the name matches the class we're looking for
1419       // before attempting to find the class.
1420       if (cp->klass_name_at_matches(k, ooff)) {
1421         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1422         if (outer_klass == k()) {
1423            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1424            instanceKlassHandle inner_klass (THREAD, ik);
1425 
1426            // Throws an exception if outer klass has not declared k as
1427            // an inner klass
1428            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1429 
1430            result->obj_at_put(members, inner_klass->java_mirror());
1431            members++;
1432         }
1433       }
1434     }
1435   }
1436 
1437   if (members != length) {
1438     // Return array of right length
1439     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1440     for(int i = 0; i < members; i++) {
1441       res->obj_at_put(i, result->obj_at(i));
1442     }
1443     return (jobjectArray)JNIHandles::make_local(env, res);
1444   }
1445 
1446   return (jobjectArray)JNIHandles::make_local(env, result());
1447 JVM_END
1448 
1449 
1450 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1451 {
1452   // ofClass is a reference to a java_lang_Class object.
1453   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1454       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1455     return NULL;
1456   }
1457 
1458   bool inner_is_member = false;
1459   Klass* outer_klass
1460     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1461                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1462   if (outer_klass == NULL)  return NULL;  // already a top-level class
1463   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1464   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1465 }
1466 JVM_END
1467 
1468 // should be in InstanceKlass.cpp, but is here for historical reasons
1469 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1470                                                      bool* inner_is_member,
1471                                                      TRAPS) {
1472   Thread* thread = THREAD;
1473   InnerClassesIterator iter(k);
1474   if (iter.length() == 0) {
1475     // No inner class info => no declaring class
1476     return NULL;
1477   }
1478 
1479   constantPoolHandle i_cp(thread, k->constants());
1480 
1481   bool found = false;
1482   Klass* ok;
1483   instanceKlassHandle outer_klass;
1484   *inner_is_member = false;
1485 
1486   // Find inner_klass attribute
1487   for (; !iter.done() && !found; iter.next()) {
1488     int ioff = iter.inner_class_info_index();
1489     int ooff = iter.outer_class_info_index();
1490     int noff = iter.inner_name_index();
1491     if (ioff != 0) {
1492       // Check to see if the name matches the class we're looking for
1493       // before attempting to find the class.
1494       if (i_cp->klass_name_at_matches(k, ioff)) {
1495         Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1496         found = (k() == inner_klass);
1497         if (found && ooff != 0) {
1498           ok = i_cp->klass_at(ooff, CHECK_NULL);
1499           outer_klass = instanceKlassHandle(thread, ok);
1500           *inner_is_member = true;
1501         }
1502       }
1503     }
1504   }
1505 
1506   if (found && outer_klass.is_null()) {
1507     // It may be anonymous; try for that.
1508     int encl_method_class_idx = k->enclosing_method_class_index();
1509     if (encl_method_class_idx != 0) {
1510       ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1511       outer_klass = instanceKlassHandle(thread, ok);
1512       *inner_is_member = false;
1513     }
1514   }
1515 
1516   // If no inner class attribute found for this class.
1517   if (outer_klass.is_null())  return NULL;
1518 
1519   // Throws an exception if outer klass has not declared k as an inner klass
1520   // We need evidence that each klass knows about the other, or else
1521   // the system could allow a spoof of an inner class to gain access rights.
1522   Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1523   return outer_klass();
1524 }
1525 
1526 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1527   assert (cls != NULL, "illegal class");
1528   JVMWrapper("JVM_GetClassSignature");
1529   JvmtiVMObjectAllocEventCollector oam;
1530   ResourceMark rm(THREAD);
1531   // Return null for arrays and primatives
1532   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1533     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1534     if (k->oop_is_instance()) {
1535       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1536       if (sym == NULL) return NULL;
1537       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1538       return (jstring) JNIHandles::make_local(env, str());
1539     }
1540   }
1541   return NULL;
1542 JVM_END
1543 
1544 
1545 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1546   assert (cls != NULL, "illegal class");
1547   JVMWrapper("JVM_GetClassAnnotations");
1548 
1549   // Return null for arrays and primitives
1550   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1551     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1552     if (k->oop_is_instance()) {
1553       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1554       return (jbyteArray) JNIHandles::make_local(env, a);
1555     }
1556   }
1557   return NULL;
1558 JVM_END
1559 
1560 
1561 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1562   // some of this code was adapted from from jni_FromReflectedField
1563 
1564   oop reflected = JNIHandles::resolve_non_null(field);
1565   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1566   Klass* k    = java_lang_Class::as_Klass(mirror);
1567   int slot      = java_lang_reflect_Field::slot(reflected);
1568   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1569 
1570   KlassHandle kh(THREAD, k);
1571   intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1572 
1573   if (modifiers & JVM_ACC_STATIC) {
1574     // for static fields we only look in the current class
1575     if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1576       assert(false, "cannot find static field");
1577       return false;
1578     }
1579   } else {
1580     // for instance fields we start with the current class and work
1581     // our way up through the superclass chain
1582     if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1583       assert(false, "cannot find instance field");
1584       return false;
1585     }
1586   }
1587   return true;
1588 }
1589 
1590 static Method* jvm_get_method_common(jobject method) {
1591   // some of this code was adapted from from jni_FromReflectedMethod
1592 
1593   oop reflected = JNIHandles::resolve_non_null(method);
1594   oop mirror    = NULL;
1595   int slot      = 0;
1596 
1597   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1598     mirror = java_lang_reflect_Constructor::clazz(reflected);
1599     slot   = java_lang_reflect_Constructor::slot(reflected);
1600   } else {
1601     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1602            "wrong type");
1603     mirror = java_lang_reflect_Method::clazz(reflected);
1604     slot   = java_lang_reflect_Method::slot(reflected);
1605   }
1606   Klass* k = java_lang_Class::as_Klass(mirror);
1607 
1608   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1609   assert(m != NULL, "cannot find method");
1610   return m;  // caller has to deal with NULL in product mode
1611 }
1612 
1613 /* Type use annotations support (JDK 1.8) */
1614 
1615 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1616   assert (cls != NULL, "illegal class");
1617   JVMWrapper("JVM_GetClassTypeAnnotations");
1618   ResourceMark rm(THREAD);
1619   // Return null for arrays and primitives
1620   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1621     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1622     if (k->oop_is_instance()) {
1623       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1624       if (type_annotations != NULL) {
1625         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1626         return (jbyteArray) JNIHandles::make_local(env, a);
1627       }
1628     }
1629   }
1630   return NULL;
1631 JVM_END
1632 
1633 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1634   assert (method != NULL, "illegal method");
1635   JVMWrapper("JVM_GetMethodTypeAnnotations");
1636 
1637   // method is a handle to a java.lang.reflect.Method object
1638   Method* m = jvm_get_method_common(method);
1639   if (m == NULL) {
1640     return NULL;
1641   }
1642 
1643   AnnotationArray* type_annotations = m->type_annotations();
1644   if (type_annotations != NULL) {
1645     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1646     return (jbyteArray) JNIHandles::make_local(env, a);
1647   }
1648 
1649   return NULL;
1650 JVM_END
1651 
1652 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1653   assert (field != NULL, "illegal field");
1654   JVMWrapper("JVM_GetFieldTypeAnnotations");
1655 
1656   fieldDescriptor fd;
1657   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1658   if (!gotFd) {
1659     return NULL;
1660   }
1661 
1662   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1663 JVM_END
1664 
1665 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1666   if (!cp->is_within_bounds(index)) {
1667     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1668   }
1669 }
1670 
1671 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1672 {
1673   JVMWrapper("JVM_GetMethodParameters");
1674   // method is a handle to a java.lang.reflect.Method object
1675   Method* method_ptr = jvm_get_method_common(method);
1676   methodHandle mh (THREAD, method_ptr);
1677   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1678   const int num_params = mh->method_parameters_length();
1679 
1680   if (num_params < 0) {
1681     // A -1 return value from method_parameters_length means there is no
1682     // parameter data.  Return null to indicate this to the reflection
1683     // API.
1684     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1685     return (jobjectArray)NULL;
1686   } else {
1687     // Otherwise, we return something up to reflection, even if it is
1688     // a zero-length array.  Why?  Because in some cases this can
1689     // trigger a MalformedParametersException.
1690 
1691     // make sure all the symbols are properly formatted
1692     for (int i = 0; i < num_params; i++) {
1693       MethodParametersElement* params = mh->method_parameters_start();
1694       int index = params[i].name_cp_index;
1695       bounds_check(mh->constants(), index, CHECK_NULL);
1696 
1697       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1698         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1699                     "Wrong type at constant pool index");
1700       }
1701 
1702     }
1703 
1704     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1705     objArrayHandle result (THREAD, result_oop);
1706 
1707     for (int i = 0; i < num_params; i++) {
1708       MethodParametersElement* params = mh->method_parameters_start();
1709       // For a 0 index, give a NULL symbol
1710       Symbol* sym = 0 != params[i].name_cp_index ?
1711         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1712       int flags = params[i].flags;
1713       oop param = Reflection::new_parameter(reflected_method, i, sym,
1714                                             flags, CHECK_NULL);
1715       result->obj_at_put(i, param);
1716     }
1717     return (jobjectArray)JNIHandles::make_local(env, result());
1718   }
1719 }
1720 JVM_END
1721 
1722 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1723 
1724 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1725 {
1726   JVMWrapper("JVM_GetClassDeclaredFields");
1727   JvmtiVMObjectAllocEventCollector oam;
1728 
1729   // Exclude primitive types and array types
1730   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1731       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1732     // Return empty array
1733     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1734     return (jobjectArray) JNIHandles::make_local(env, res);
1735   }
1736 
1737   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1738   constantPoolHandle cp(THREAD, k->constants());
1739 
1740   // Ensure class is linked
1741   k->link_class(CHECK_NULL);
1742 
1743   // 4496456 We need to filter out java.lang.Throwable.backtrace
1744   bool skip_backtrace = false;
1745 
1746   // Allocate result
1747   int num_fields;
1748 
1749   if (publicOnly) {
1750     num_fields = 0;
1751     for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1752       if (fs.access_flags().is_public()) ++num_fields;
1753     }
1754   } else {
1755     num_fields = k->java_fields_count();
1756 
1757     if (k() == SystemDictionary::Throwable_klass()) {
1758       num_fields--;
1759       skip_backtrace = true;
1760     }
1761   }
1762 
1763   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1764   objArrayHandle result (THREAD, r);
1765 
1766   int out_idx = 0;
1767   fieldDescriptor fd;
1768   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1769     if (skip_backtrace) {
1770       // 4496456 skip java.lang.Throwable.backtrace
1771       int offset = fs.offset();
1772       if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1773     }
1774 
1775     if (!publicOnly || fs.access_flags().is_public()) {
1776       fd.reinitialize(k(), fs.index());
1777       oop field = Reflection::new_field(&fd, CHECK_NULL);
1778       result->obj_at_put(out_idx, field);
1779       ++out_idx;
1780     }
1781   }
1782   assert(out_idx == num_fields, "just checking");
1783   return (jobjectArray) JNIHandles::make_local(env, result());
1784 }
1785 JVM_END
1786 
1787 static bool select_method(methodHandle method, bool want_constructor) {
1788   if (want_constructor) {
1789     return (method->is_initializer() && !method->is_static());
1790   } else {
1791     return  (!method->is_initializer() && !method->is_overpass());
1792   }
1793 }
1794 
1795 static jobjectArray get_class_declared_methods_helper(
1796                                   JNIEnv *env,
1797                                   jclass ofClass, jboolean publicOnly,
1798                                   bool want_constructor,
1799                                   Klass* klass, TRAPS) {
1800 
1801   JvmtiVMObjectAllocEventCollector oam;
1802 
1803   // Exclude primitive types and array types
1804   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1805       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1806     // Return empty array
1807     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1808     return (jobjectArray) JNIHandles::make_local(env, res);
1809   }
1810 
1811   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1812 
1813   // Ensure class is linked
1814   k->link_class(CHECK_NULL);
1815 
1816   Array<Method*>* methods = k->methods();
1817   int methods_length = methods->length();
1818 
1819   // Save original method_idnum in case of redefinition, which can change
1820   // the idnum of obsolete methods.  The new method will have the same idnum
1821   // but if we refresh the methods array, the counts will be wrong.
1822   ResourceMark rm(THREAD);
1823   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1824   int num_methods = 0;
1825 
1826   for (int i = 0; i < methods_length; i++) {
1827     methodHandle method(THREAD, methods->at(i));
1828     if (select_method(method, want_constructor)) {
1829       if (!publicOnly || method->is_public()) {
1830         idnums->push(method->method_idnum());
1831         ++num_methods;
1832       }
1833     }
1834   }
1835 
1836   // Allocate result
1837   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1838   objArrayHandle result (THREAD, r);
1839 
1840   // Now just put the methods that we selected above, but go by their idnum
1841   // in case of redefinition.  The methods can be redefined at any safepoint,
1842   // so above when allocating the oop array and below when creating reflect
1843   // objects.
1844   for (int i = 0; i < num_methods; i++) {
1845     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1846     if (method.is_null()) {
1847       // Method may have been deleted and seems this API can handle null
1848       // Otherwise should probably put a method that throws NSME
1849       result->obj_at_put(i, NULL);
1850     } else {
1851       oop m;
1852       if (want_constructor) {
1853         m = Reflection::new_constructor(method, CHECK_NULL);
1854       } else {
1855         m = Reflection::new_method(method, false, CHECK_NULL);
1856       }
1857       result->obj_at_put(i, m);
1858     }
1859   }
1860 
1861   return (jobjectArray) JNIHandles::make_local(env, result());
1862 }
1863 
1864 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1865 {
1866   JVMWrapper("JVM_GetClassDeclaredMethods");
1867   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1868                                            /*want_constructor*/ false,
1869                                            SystemDictionary::reflect_Method_klass(), THREAD);
1870 }
1871 JVM_END
1872 
1873 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1874 {
1875   JVMWrapper("JVM_GetClassDeclaredConstructors");
1876   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1877                                            /*want_constructor*/ true,
1878                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
1879 }
1880 JVM_END
1881 
1882 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1883 {
1884   JVMWrapper("JVM_GetClassAccessFlags");
1885   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1886     // Primitive type
1887     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1888   }
1889 
1890   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1891   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1892 }
1893 JVM_END
1894 
1895 
1896 // Constant pool access //////////////////////////////////////////////////////////
1897 
1898 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1899 {
1900   JVMWrapper("JVM_GetClassConstantPool");
1901   JvmtiVMObjectAllocEventCollector oam;
1902 
1903   // Return null for primitives and arrays
1904   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1905     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1906     if (k->oop_is_instance()) {
1907       instanceKlassHandle k_h(THREAD, k);
1908       Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1909       sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1910       return JNIHandles::make_local(jcp());
1911     }
1912   }
1913   return NULL;
1914 }
1915 JVM_END
1916 
1917 
1918 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1919 {
1920   JVMWrapper("JVM_ConstantPoolGetSize");
1921   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1922   return cp->length();
1923 }
1924 JVM_END
1925 
1926 
1927 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1928 {
1929   JVMWrapper("JVM_ConstantPoolGetClassAt");
1930   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1931   bounds_check(cp, index, CHECK_NULL);
1932   constantTag tag = cp->tag_at(index);
1933   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1934     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1935   }
1936   Klass* k = cp->klass_at(index, CHECK_NULL);
1937   return (jclass) JNIHandles::make_local(k->java_mirror());
1938 }
1939 JVM_END
1940 
1941 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1942 {
1943   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1944   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1945   bounds_check(cp, index, CHECK_NULL);
1946   constantTag tag = cp->tag_at(index);
1947   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1948     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1949   }
1950   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1951   if (k == NULL) return NULL;
1952   return (jclass) JNIHandles::make_local(k->java_mirror());
1953 }
1954 JVM_END
1955 
1956 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1957   constantTag tag = cp->tag_at(index);
1958   if (!tag.is_method() && !tag.is_interface_method()) {
1959     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1960   }
1961   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1962   Klass* k_o;
1963   if (force_resolution) {
1964     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1965   } else {
1966     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1967     if (k_o == NULL) return NULL;
1968   }
1969   instanceKlassHandle k(THREAD, k_o);
1970   Symbol* name = cp->uncached_name_ref_at(index);
1971   Symbol* sig  = cp->uncached_signature_ref_at(index);
1972   methodHandle m (THREAD, k->find_method(name, sig));
1973   if (m.is_null()) {
1974     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1975   }
1976   oop method;
1977   if (!m->is_initializer() || m->is_static()) {
1978     method = Reflection::new_method(m, true, CHECK_NULL);
1979   } else {
1980     method = Reflection::new_constructor(m, CHECK_NULL);
1981   }
1982   return JNIHandles::make_local(method);
1983 }
1984 
1985 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1986 {
1987   JVMWrapper("JVM_ConstantPoolGetMethodAt");
1988   JvmtiVMObjectAllocEventCollector oam;
1989   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1990   bounds_check(cp, index, CHECK_NULL);
1991   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1992   return res;
1993 }
1994 JVM_END
1995 
1996 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1997 {
1998   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1999   JvmtiVMObjectAllocEventCollector oam;
2000   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2001   bounds_check(cp, index, CHECK_NULL);
2002   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2003   return res;
2004 }
2005 JVM_END
2006 
2007 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2008   constantTag tag = cp->tag_at(index);
2009   if (!tag.is_field()) {
2010     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2011   }
2012   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2013   Klass* k_o;
2014   if (force_resolution) {
2015     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2016   } else {
2017     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2018     if (k_o == NULL) return NULL;
2019   }
2020   instanceKlassHandle k(THREAD, k_o);
2021   Symbol* name = cp->uncached_name_ref_at(index);
2022   Symbol* sig  = cp->uncached_signature_ref_at(index);
2023   fieldDescriptor fd;
2024   Klass* target_klass = k->find_field(name, sig, &fd);
2025   if (target_klass == NULL) {
2026     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2027   }
2028   oop field = Reflection::new_field(&fd, CHECK_NULL);
2029   return JNIHandles::make_local(field);
2030 }
2031 
2032 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2033 {
2034   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2035   JvmtiVMObjectAllocEventCollector oam;
2036   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2037   bounds_check(cp, index, CHECK_NULL);
2038   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2039   return res;
2040 }
2041 JVM_END
2042 
2043 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2044 {
2045   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2046   JvmtiVMObjectAllocEventCollector oam;
2047   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2048   bounds_check(cp, index, CHECK_NULL);
2049   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2050   return res;
2051 }
2052 JVM_END
2053 
2054 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2055 {
2056   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2057   JvmtiVMObjectAllocEventCollector oam;
2058   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2059   bounds_check(cp, index, CHECK_NULL);
2060   constantTag tag = cp->tag_at(index);
2061   if (!tag.is_field_or_method()) {
2062     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2063   }
2064   int klass_ref = cp->uncached_klass_ref_index_at(index);
2065   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2066   Symbol*  member_name = cp->uncached_name_ref_at(index);
2067   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2068   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2069   objArrayHandle dest(THREAD, dest_o);
2070   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2071   dest->obj_at_put(0, str());
2072   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2073   dest->obj_at_put(1, str());
2074   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2075   dest->obj_at_put(2, str());
2076   return (jobjectArray) JNIHandles::make_local(dest());
2077 }
2078 JVM_END
2079 
2080 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2081 {
2082   JVMWrapper("JVM_ConstantPoolGetIntAt");
2083   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2084   bounds_check(cp, index, CHECK_0);
2085   constantTag tag = cp->tag_at(index);
2086   if (!tag.is_int()) {
2087     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2088   }
2089   return cp->int_at(index);
2090 }
2091 JVM_END
2092 
2093 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2094 {
2095   JVMWrapper("JVM_ConstantPoolGetLongAt");
2096   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2097   bounds_check(cp, index, CHECK_(0L));
2098   constantTag tag = cp->tag_at(index);
2099   if (!tag.is_long()) {
2100     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2101   }
2102   return cp->long_at(index);
2103 }
2104 JVM_END
2105 
2106 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2107 {
2108   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2109   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2110   bounds_check(cp, index, CHECK_(0.0f));
2111   constantTag tag = cp->tag_at(index);
2112   if (!tag.is_float()) {
2113     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2114   }
2115   return cp->float_at(index);
2116 }
2117 JVM_END
2118 
2119 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2120 {
2121   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2122   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2123   bounds_check(cp, index, CHECK_(0.0));
2124   constantTag tag = cp->tag_at(index);
2125   if (!tag.is_double()) {
2126     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2127   }
2128   return cp->double_at(index);
2129 }
2130 JVM_END
2131 
2132 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2133 {
2134   JVMWrapper("JVM_ConstantPoolGetStringAt");
2135   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2136   bounds_check(cp, index, CHECK_NULL);
2137   constantTag tag = cp->tag_at(index);
2138   if (!tag.is_string()) {
2139     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2140   }
2141   oop str = cp->string_at(index, CHECK_NULL);
2142   return (jstring) JNIHandles::make_local(str);
2143 }
2144 JVM_END
2145 
2146 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2147 {
2148   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2149   JvmtiVMObjectAllocEventCollector oam;
2150   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2151   bounds_check(cp, index, CHECK_NULL);
2152   constantTag tag = cp->tag_at(index);
2153   if (!tag.is_symbol()) {
2154     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2155   }
2156   Symbol* sym = cp->symbol_at(index);
2157   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2158   return (jstring) JNIHandles::make_local(str());
2159 }
2160 JVM_END
2161 
2162 
2163 // Assertion support. //////////////////////////////////////////////////////////
2164 
2165 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2166   JVMWrapper("JVM_DesiredAssertionStatus");
2167   assert(cls != NULL, "bad class");
2168 
2169   oop r = JNIHandles::resolve(cls);
2170   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2171   if (java_lang_Class::is_primitive(r)) return false;
2172 
2173   Klass* k = java_lang_Class::as_Klass(r);
2174   assert(k->oop_is_instance(), "must be an instance klass");
2175   if (! k->oop_is_instance()) return false;
2176 
2177   ResourceMark rm(THREAD);
2178   const char* name = k->name()->as_C_string();
2179   bool system_class = k->class_loader() == NULL;
2180   return JavaAssertions::enabled(name, system_class);
2181 
2182 JVM_END
2183 
2184 
2185 // Return a new AssertionStatusDirectives object with the fields filled in with
2186 // command-line assertion arguments (i.e., -ea, -da).
2187 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2188   JVMWrapper("JVM_AssertionStatusDirectives");
2189   JvmtiVMObjectAllocEventCollector oam;
2190   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2191   return JNIHandles::make_local(env, asd);
2192 JVM_END
2193 
2194 // Verification ////////////////////////////////////////////////////////////////////////////////
2195 
2196 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2197 
2198 // RedefineClasses support: bug 6214132 caused verification to fail.
2199 // All functions from this section should call the jvmtiThreadSate function:
2200 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2201 // The function returns a Klass* of the _scratch_class if the verifier
2202 // was invoked in the middle of the class redefinition.
2203 // Otherwise it returns its argument value which is the _the_class Klass*.
2204 // Please, refer to the description in the jvmtiThreadSate.hpp.
2205 
2206 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2207   JVMWrapper("JVM_GetClassNameUTF");
2208   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2209   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2210   return k->name()->as_utf8();
2211 JVM_END
2212 
2213 
2214 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2215   JVMWrapper("JVM_GetClassCPTypes");
2216   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2217   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2218   // types will have length zero if this is not an InstanceKlass
2219   // (length is determined by call to JVM_GetClassCPEntriesCount)
2220   if (k->oop_is_instance()) {
2221     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2222     for (int index = cp->length() - 1; index >= 0; index--) {
2223       constantTag tag = cp->tag_at(index);
2224       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2225   }
2226   }
2227 JVM_END
2228 
2229 
2230 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2231   JVMWrapper("JVM_GetClassCPEntriesCount");
2232   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2233   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2234   if (!k->oop_is_instance())
2235     return 0;
2236   return InstanceKlass::cast(k)->constants()->length();
2237 JVM_END
2238 
2239 
2240 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2241   JVMWrapper("JVM_GetClassFieldsCount");
2242   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2243   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2244   if (!k->oop_is_instance())
2245     return 0;
2246   return InstanceKlass::cast(k)->java_fields_count();
2247 JVM_END
2248 
2249 
2250 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2251   JVMWrapper("JVM_GetClassMethodsCount");
2252   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2253   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2254   if (!k->oop_is_instance())
2255     return 0;
2256   return InstanceKlass::cast(k)->methods()->length();
2257 JVM_END
2258 
2259 
2260 // The following methods, used for the verifier, are never called with
2261 // array klasses, so a direct cast to InstanceKlass is safe.
2262 // Typically, these methods are called in a loop with bounds determined
2263 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2264 // zero for arrays.
2265 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2266   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2267   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2268   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2269   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2270   int length = method->checked_exceptions_length();
2271   if (length > 0) {
2272     CheckedExceptionElement* table= method->checked_exceptions_start();
2273     for (int i = 0; i < length; i++) {
2274       exceptions[i] = table[i].class_cp_index;
2275     }
2276   }
2277 JVM_END
2278 
2279 
2280 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2281   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2282   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2283   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2284   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2285   return method->checked_exceptions_length();
2286 JVM_END
2287 
2288 
2289 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2290   JVMWrapper("JVM_GetMethodIxByteCode");
2291   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2292   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2293   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2294   memcpy(code, method->code_base(), method->code_size());
2295 JVM_END
2296 
2297 
2298 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2299   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2300   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2301   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2302   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2303   return method->code_size();
2304 JVM_END
2305 
2306 
2307 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2308   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2309   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2310   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2311   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2312   ExceptionTable extable(method);
2313   entry->start_pc   = extable.start_pc(entry_index);
2314   entry->end_pc     = extable.end_pc(entry_index);
2315   entry->handler_pc = extable.handler_pc(entry_index);
2316   entry->catchType  = extable.catch_type_index(entry_index);
2317 JVM_END
2318 
2319 
2320 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2321   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2322   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2323   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2324   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2325   return method->exception_table_length();
2326 JVM_END
2327 
2328 
2329 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2330   JVMWrapper("JVM_GetMethodIxModifiers");
2331   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2332   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2333   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2334   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2335 JVM_END
2336 
2337 
2338 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2339   JVMWrapper("JVM_GetFieldIxModifiers");
2340   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2341   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2342   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2343 JVM_END
2344 
2345 
2346 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2347   JVMWrapper("JVM_GetMethodIxLocalsCount");
2348   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2349   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2350   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2351   return method->max_locals();
2352 JVM_END
2353 
2354 
2355 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2356   JVMWrapper("JVM_GetMethodIxArgsSize");
2357   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2358   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2359   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2360   return method->size_of_parameters();
2361 JVM_END
2362 
2363 
2364 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2365   JVMWrapper("JVM_GetMethodIxMaxStack");
2366   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2367   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2368   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2369   return method->verifier_max_stack();
2370 JVM_END
2371 
2372 
2373 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2374   JVMWrapper("JVM_IsConstructorIx");
2375   ResourceMark rm(THREAD);
2376   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379   return method->name()->equals(vmSymbols::object_initializer_name());
2380 JVM_END
2381 
2382 
2383 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2384   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2385   ResourceMark rm(THREAD);
2386   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2387   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2388   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2389   return method->is_overpass();
2390 JVM_END
2391 
2392 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2393   JVMWrapper("JVM_GetMethodIxIxUTF");
2394   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2395   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2396   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2397   return method->name()->as_utf8();
2398 JVM_END
2399 
2400 
2401 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2402   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2403   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2404   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2405   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2406   return method->signature()->as_utf8();
2407 JVM_END
2408 
2409 /**
2410  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2411  * read entries in the constant pool.  Since the old verifier always
2412  * works on a copy of the code, it will not see any rewriting that
2413  * may possibly occur in the middle of verification.  So it is important
2414  * that nothing it calls tries to use the cpCache instead of the raw
2415  * constant pool, so we must use cp->uncached_x methods when appropriate.
2416  */
2417 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2418   JVMWrapper("JVM_GetCPFieldNameUTF");
2419   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2422   switch (cp->tag_at(cp_index).value()) {
2423     case JVM_CONSTANT_Fieldref:
2424       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2425     default:
2426       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2427   }
2428   ShouldNotReachHere();
2429   return NULL;
2430 JVM_END
2431 
2432 
2433 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2434   JVMWrapper("JVM_GetCPMethodNameUTF");
2435   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2436   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2437   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2438   switch (cp->tag_at(cp_index).value()) {
2439     case JVM_CONSTANT_InterfaceMethodref:
2440     case JVM_CONSTANT_Methodref:
2441     case JVM_CONSTANT_NameAndType:  // for invokedynamic
2442       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2443     default:
2444       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2445   }
2446   ShouldNotReachHere();
2447   return NULL;
2448 JVM_END
2449 
2450 
2451 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2452   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2453   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2456   switch (cp->tag_at(cp_index).value()) {
2457     case JVM_CONSTANT_InterfaceMethodref:
2458     case JVM_CONSTANT_Methodref:
2459     case JVM_CONSTANT_NameAndType:  // for invokedynamic
2460       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2461     default:
2462       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2463   }
2464   ShouldNotReachHere();
2465   return NULL;
2466 JVM_END
2467 
2468 
2469 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2470   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2471   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2472   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2473   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2474   switch (cp->tag_at(cp_index).value()) {
2475     case JVM_CONSTANT_Fieldref:
2476       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2477     default:
2478       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2479   }
2480   ShouldNotReachHere();
2481   return NULL;
2482 JVM_END
2483 
2484 
2485 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2486   JVMWrapper("JVM_GetCPClassNameUTF");
2487   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2488   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2489   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2490   Symbol* classname = cp->klass_name_at(cp_index);
2491   return classname->as_utf8();
2492 JVM_END
2493 
2494 
2495 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2496   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2497   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2498   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2499   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2500   switch (cp->tag_at(cp_index).value()) {
2501     case JVM_CONSTANT_Fieldref: {
2502       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2503       Symbol* classname = cp->klass_name_at(class_index);
2504       return classname->as_utf8();
2505     }
2506     default:
2507       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2508   }
2509   ShouldNotReachHere();
2510   return NULL;
2511 JVM_END
2512 
2513 
2514 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2515   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2516   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2517   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2518   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2519   switch (cp->tag_at(cp_index).value()) {
2520     case JVM_CONSTANT_Methodref:
2521     case JVM_CONSTANT_InterfaceMethodref: {
2522       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2523       Symbol* classname = cp->klass_name_at(class_index);
2524       return classname->as_utf8();
2525     }
2526     default:
2527       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2528   }
2529   ShouldNotReachHere();
2530   return NULL;
2531 JVM_END
2532 
2533 
2534 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2535   JVMWrapper("JVM_GetCPFieldModifiers");
2536   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2537   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2538   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2539   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2540   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2541   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2542   switch (cp->tag_at(cp_index).value()) {
2543     case JVM_CONSTANT_Fieldref: {
2544       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2545       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2546       for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2547         if (fs.name()->equals(name) && fs.signature()->equals(signature)) {
2548           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2549         }
2550       }
2551       return -1;
2552     }
2553     default:
2554       fatal("JVM_GetCPFieldModifiers: illegal constant");
2555   }
2556   ShouldNotReachHere();
2557   return 0;
2558 JVM_END
2559 
2560 
2561 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2562   JVMWrapper("JVM_GetCPMethodModifiers");
2563   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2564   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2565   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2566   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2567   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2568   switch (cp->tag_at(cp_index).value()) {
2569     case JVM_CONSTANT_Methodref:
2570     case JVM_CONSTANT_InterfaceMethodref: {
2571       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2572       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2573       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2574       int methods_count = methods->length();
2575       for (int i = 0; i < methods_count; i++) {
2576         Method* method = methods->at(i);
2577         if (method->name()->equals(name) && method->signature()->equals(signature)) {
2578             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2579         }
2580       }
2581       return -1;
2582     }
2583     default:
2584       fatal("JVM_GetCPMethodModifiers: illegal constant");
2585   }
2586   ShouldNotReachHere();
2587   return 0;
2588 JVM_END
2589 
2590 
2591 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2592 
2593 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2594   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2595 JVM_END
2596 
2597 
2598 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2599   JVMWrapper("JVM_IsSameClassPackage");
2600   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2601   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2602   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2603   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2604   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2605 JVM_END
2606 
2607 // Printing support //////////////////////////////////////////////////
2608 extern "C" {
2609 
2610 ATTRIBUTE_PRINTF(3, 0)
2611 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2612   // see bug 4399518, 4417214
2613   if ((intptr_t)count <= 0) return -1;
2614 
2615   int result = vsnprintf(str, count, fmt, args);
2616   // Note: on truncation vsnprintf(3) on Unix returns numbers of
2617   // characters which would have been written had the buffer been large
2618   // enough; on Windows, it returns -1. We handle both cases here and
2619   // always return -1, and perform null termination.
2620   if ((result > 0 && (size_t)result >= count) || result == -1) {
2621     str[count - 1] = '\0';
2622     result = -1;
2623   }
2624 
2625   return result;
2626 }
2627 
2628 ATTRIBUTE_PRINTF(3, 0)
2629 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2630   va_list args;
2631   int len;
2632   va_start(args, fmt);
2633   len = jio_vsnprintf(str, count, fmt, args);
2634   va_end(args);
2635   return len;
2636 }
2637 
2638 ATTRIBUTE_PRINTF(2,3)
2639 int jio_fprintf(FILE* f, const char *fmt, ...) {
2640   int len;
2641   va_list args;
2642   va_start(args, fmt);
2643   len = jio_vfprintf(f, fmt, args);
2644   va_end(args);
2645   return len;
2646 }
2647 
2648 ATTRIBUTE_PRINTF(2, 0)
2649 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2650   if (Arguments::vfprintf_hook() != NULL) {
2651      return Arguments::vfprintf_hook()(f, fmt, args);
2652   } else {
2653     return vfprintf(f, fmt, args);
2654   }
2655 }
2656 
2657 ATTRIBUTE_PRINTF(1, 2)
2658 JNIEXPORT int jio_printf(const char *fmt, ...) {
2659   int len;
2660   va_list args;
2661   va_start(args, fmt);
2662   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2663   va_end(args);
2664   return len;
2665 }
2666 
2667 
2668 // HotSpot specific jio method
2669 void jio_print(const char* s) {
2670   // Try to make this function as atomic as possible.
2671   if (Arguments::vfprintf_hook() != NULL) {
2672     jio_fprintf(defaultStream::output_stream(), "%s", s);
2673   } else {
2674     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2675     size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2676   }
2677 }
2678 
2679 } // Extern C
2680 
2681 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2682 
2683 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2684 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2685 // OSThread objects.  The exception to this rule is when the target object is the thread
2686 // doing the operation, in which case we know that the thread won't exit until the
2687 // operation is done (all exits being voluntary).  There are a few cases where it is
2688 // rather silly to do operations on yourself, like resuming yourself or asking whether
2689 // you are alive.  While these can still happen, they are not subject to deadlocks if
2690 // the lock is held while the operation occurs (this is not the case for suspend, for
2691 // instance), and are very unlikely.  Because IsAlive needs to be fast and its
2692 // implementation is local to this file, we always lock Threads_lock for that one.
2693 
2694 static void thread_entry(JavaThread* thread, TRAPS) {
2695   HandleMark hm(THREAD);
2696   Handle obj(THREAD, thread->threadObj());
2697   JavaValue result(T_VOID);
2698   JavaCalls::call_virtual(&result,
2699                           obj,
2700                           KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2701                           vmSymbols::run_method_name(),
2702                           vmSymbols::void_method_signature(),
2703                           THREAD);
2704 }
2705 
2706 
2707 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2708   JVMWrapper("JVM_StartThread");
2709   JavaThread *native_thread = NULL;
2710 
2711   // We cannot hold the Threads_lock when we throw an exception,
2712   // due to rank ordering issues. Example:  we might need to grab the
2713   // Heap_lock while we construct the exception.
2714   bool throw_illegal_thread_state = false;
2715 
2716   // We must release the Threads_lock before we can post a jvmti event
2717   // in Thread::start.
2718   {
2719     // Ensure that the C++ Thread and OSThread structures aren't freed before
2720     // we operate.
2721     MutexLocker mu(Threads_lock);
2722 
2723     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2724     // re-starting an already started thread, so we should usually find
2725     // that the JavaThread is null. However for a JNI attached thread
2726     // there is a small window between the Thread object being created
2727     // (with its JavaThread set) and the update to its threadStatus, so we
2728     // have to check for this
2729     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2730       throw_illegal_thread_state = true;
2731     } else {
2732       // We could also check the stillborn flag to see if this thread was already stopped, but
2733       // for historical reasons we let the thread detect that itself when it starts running
2734 
2735       jlong size =
2736              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2737       // Allocate the C++ Thread structure and create the native thread.  The
2738       // stack size retrieved from java is signed, but the constructor takes
2739       // size_t (an unsigned type), so avoid passing negative values which would
2740       // result in really large stacks.
2741       size_t sz = size > 0 ? (size_t) size : 0;
2742       native_thread = new JavaThread(&thread_entry, sz);
2743 
2744       // At this point it may be possible that no osthread was created for the
2745       // JavaThread due to lack of memory. Check for this situation and throw
2746       // an exception if necessary. Eventually we may want to change this so
2747       // that we only grab the lock if the thread was created successfully -
2748       // then we can also do this check and throw the exception in the
2749       // JavaThread constructor.
2750       if (native_thread->osthread() != NULL) {
2751         // Note: the current thread is not being used within "prepare".
2752         native_thread->prepare(jthread);
2753       }
2754     }
2755   }
2756 
2757   if (throw_illegal_thread_state) {
2758     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2759   }
2760 
2761   assert(native_thread != NULL, "Starting null thread?");
2762 
2763   if (native_thread->osthread() == NULL) {
2764     // No one should hold a reference to the 'native_thread'.
2765     delete native_thread;
2766     if (JvmtiExport::should_post_resource_exhausted()) {
2767       JvmtiExport::post_resource_exhausted(
2768         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2769         os::native_thread_creation_failed_msg());
2770     }
2771     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2772               os::native_thread_creation_failed_msg());
2773   }
2774 
2775   Thread::start(native_thread);
2776 
2777 JVM_END
2778 
2779 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2780 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2781 // but is thought to be reliable and simple. In the case, where the receiver is the
2782 // same thread as the sender, no safepoint is needed.
2783 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2784   JVMWrapper("JVM_StopThread");
2785 
2786   oop java_throwable = JNIHandles::resolve(throwable);
2787   if (java_throwable == NULL) {
2788     THROW(vmSymbols::java_lang_NullPointerException());
2789   }
2790   oop java_thread = JNIHandles::resolve_non_null(jthread);
2791   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2792   Events::log_exception(JavaThread::current(),
2793                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2794                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
2795   // First check if thread is alive
2796   if (receiver != NULL) {
2797     // Check if exception is getting thrown at self (use oop equality, since the
2798     // target object might exit)
2799     if (java_thread == thread->threadObj()) {
2800       THROW_OOP(java_throwable);
2801     } else {
2802       // Enques a VM_Operation to stop all threads and then deliver the exception...
2803       Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2804     }
2805   }
2806   else {
2807     // Either:
2808     // - target thread has not been started before being stopped, or
2809     // - target thread already terminated
2810     // We could read the threadStatus to determine which case it is
2811     // but that is overkill as it doesn't matter. We must set the
2812     // stillborn flag for the first case, and if the thread has already
2813     // exited setting this flag has no affect
2814     java_lang_Thread::set_stillborn(java_thread);
2815   }
2816 JVM_END
2817 
2818 
2819 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2820   JVMWrapper("JVM_IsThreadAlive");
2821 
2822   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2823   return java_lang_Thread::is_alive(thread_oop);
2824 JVM_END
2825 
2826 
2827 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2828   JVMWrapper("JVM_SuspendThread");
2829   oop java_thread = JNIHandles::resolve_non_null(jthread);
2830   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2831 
2832   if (receiver != NULL) {
2833     // thread has run and has not exited (still on threads list)
2834 
2835     {
2836       MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2837       if (receiver->is_external_suspend()) {
2838         // Don't allow nested external suspend requests. We can't return
2839         // an error from this interface so just ignore the problem.
2840         return;
2841       }
2842       if (receiver->is_exiting()) { // thread is in the process of exiting
2843         return;
2844       }
2845       receiver->set_external_suspend();
2846     }
2847 
2848     // java_suspend() will catch threads in the process of exiting
2849     // and will ignore them.
2850     receiver->java_suspend();
2851 
2852     // It would be nice to have the following assertion in all the
2853     // time, but it is possible for a racing resume request to have
2854     // resumed this thread right after we suspended it. Temporarily
2855     // enable this assertion if you are chasing a different kind of
2856     // bug.
2857     //
2858     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2859     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2860   }
2861 JVM_END
2862 
2863 
2864 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2865   JVMWrapper("JVM_ResumeThread");
2866   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2867   // We need to *always* get the threads lock here, since this operation cannot be allowed during
2868   // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2869   // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2870   // looks at it.
2871   MutexLocker ml(Threads_lock);
2872   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2873   if (thr != NULL) {
2874     // the thread has run and is not in the process of exiting
2875     thr->java_resume();
2876   }
2877 JVM_END
2878 
2879 
2880 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2881   JVMWrapper("JVM_SetThreadPriority");
2882   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2883   MutexLocker ml(Threads_lock);
2884   oop java_thread = JNIHandles::resolve_non_null(jthread);
2885   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2886   JavaThread* thr = java_lang_Thread::thread(java_thread);
2887   if (thr != NULL) {                  // Thread not yet started; priority pushed down when it is
2888     Thread::set_priority(thr, (ThreadPriority)prio);
2889   }
2890 JVM_END
2891 
2892 
2893 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2894   JVMWrapper("JVM_Yield");
2895   if (os::dont_yield()) return;
2896   HOTSPOT_THREAD_YIELD();
2897 
2898   // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2899   // Critical for similar threading behaviour
2900   if (ConvertYieldToSleep) {
2901     os::sleep(thread, MinSleepInterval, false);
2902   } else {
2903     os::naked_yield();
2904   }
2905 JVM_END
2906 
2907 
2908 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2909   JVMWrapper("JVM_Sleep");
2910 
2911   if (millis < 0) {
2912     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2913   }
2914 
2915   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2916     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2917   }
2918 
2919   // Save current thread state and restore it at the end of this block.
2920   // And set new thread state to SLEEPING.
2921   JavaThreadSleepState jtss(thread);
2922 
2923   HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2924 
2925   EventThreadSleep event;
2926 
2927   if (millis == 0) {
2928     // When ConvertSleepToYield is on, this matches the classic VM implementation of
2929     // JVM_Sleep. Critical for similar threading behaviour (Win32)
2930     // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2931     // for SOLARIS
2932     if (ConvertSleepToYield) {
2933       os::naked_yield();
2934     } else {
2935       ThreadState old_state = thread->osthread()->get_state();
2936       thread->osthread()->set_state(SLEEPING);
2937       os::sleep(thread, MinSleepInterval, false);
2938       thread->osthread()->set_state(old_state);
2939     }
2940   } else {
2941     ThreadState old_state = thread->osthread()->get_state();
2942     thread->osthread()->set_state(SLEEPING);
2943     if (os::sleep(thread, millis, true) == OS_INTRPT) {
2944       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2945       // us while we were sleeping. We do not overwrite those.
2946       if (!HAS_PENDING_EXCEPTION) {
2947         if (event.should_commit()) {
2948           event.set_time(millis);
2949           event.commit();
2950         }
2951         HOTSPOT_THREAD_SLEEP_END(1);
2952 
2953         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2954         // to properly restore the thread state.  That's likely wrong.
2955         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2956       }
2957     }
2958     thread->osthread()->set_state(old_state);
2959   }
2960   if (event.should_commit()) {
2961     event.set_time(millis);
2962     event.commit();
2963   }
2964   HOTSPOT_THREAD_SLEEP_END(0);
2965 JVM_END
2966 
2967 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2968   JVMWrapper("JVM_CurrentThread");
2969   oop jthread = thread->threadObj();
2970   assert (thread != NULL, "no current thread!");
2971   return JNIHandles::make_local(env, jthread);
2972 JVM_END
2973 
2974 
2975 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2976   JVMWrapper("JVM_CountStackFrames");
2977 
2978   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2979   oop java_thread = JNIHandles::resolve_non_null(jthread);
2980   bool throw_illegal_thread_state = false;
2981   int count = 0;
2982 
2983   {
2984     MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2985     // We need to re-resolve the java_thread, since a GC might have happened during the
2986     // acquire of the lock
2987     JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2988 
2989     if (thr == NULL) {
2990       // do nothing
2991     } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2992       // Check whether this java thread has been suspended already. If not, throws
2993       // IllegalThreadStateException. We defer to throw that exception until
2994       // Threads_lock is released since loading exception class has to leave VM.
2995       // The correct way to test a thread is actually suspended is
2996       // wait_for_ext_suspend_completion(), but we can't call that while holding
2997       // the Threads_lock. The above tests are sufficient for our purposes
2998       // provided the walkability of the stack is stable - which it isn't
2999       // 100% but close enough for most practical purposes.
3000       throw_illegal_thread_state = true;
3001     } else {
3002       // Count all java activation, i.e., number of vframes
3003       for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3004         // Native frames are not counted
3005         if (!vfst.method()->is_native()) count++;
3006        }
3007     }
3008   }
3009 
3010   if (throw_illegal_thread_state) {
3011     THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3012                 "this thread is not suspended");
3013   }
3014   return count;
3015 JVM_END
3016 
3017 // Consider: A better way to implement JVM_Interrupt() is to acquire
3018 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3019 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3020 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3021 // outside the critical section.  Threads_lock is hot so we want to minimize
3022 // the hold-time.  A cleaner interface would be to decompose interrupt into
3023 // two steps.  The 1st phase, performed under Threads_lock, would return
3024 // a closure that'd be invoked after Threads_lock was dropped.
3025 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3026 // admit spurious wakeups.
3027 
3028 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3029   JVMWrapper("JVM_Interrupt");
3030 
3031   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3032   oop java_thread = JNIHandles::resolve_non_null(jthread);
3033   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3034   // We need to re-resolve the java_thread, since a GC might have happened during the
3035   // acquire of the lock
3036   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3037   if (thr != NULL) {
3038     Thread::interrupt(thr);
3039   }
3040 JVM_END
3041 
3042 
3043 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3044   JVMWrapper("JVM_IsInterrupted");
3045 
3046   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3047   oop java_thread = JNIHandles::resolve_non_null(jthread);
3048   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3049   // We need to re-resolve the java_thread, since a GC might have happened during the
3050   // acquire of the lock
3051   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3052   if (thr == NULL) {
3053     return JNI_FALSE;
3054   } else {
3055     return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3056   }
3057 JVM_END
3058 
3059 
3060 // Return true iff the current thread has locked the object passed in
3061 
3062 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3063   JVMWrapper("JVM_HoldsLock");
3064   assert(THREAD->is_Java_thread(), "sanity check");
3065   if (obj == NULL) {
3066     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3067   }
3068   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3069   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3070 JVM_END
3071 
3072 
3073 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3074   JVMWrapper("JVM_DumpAllStacks");
3075   VM_PrintThreads op;
3076   VMThread::execute(&op);
3077   if (JvmtiExport::should_post_data_dump()) {
3078     JvmtiExport::post_data_dump();
3079   }
3080 JVM_END
3081 
3082 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3083   JVMWrapper("JVM_SetNativeThreadName");
3084   ResourceMark rm(THREAD);
3085   oop java_thread = JNIHandles::resolve_non_null(jthread);
3086   JavaThread* thr = java_lang_Thread::thread(java_thread);
3087   // Thread naming only supported for the current thread, doesn't work for
3088   // target threads.
3089   if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3090     // we don't set the name of an attached thread to avoid stepping
3091     // on other programs
3092     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3093     os::set_native_thread_name(thread_name);
3094   }
3095 JVM_END
3096 
3097 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3098 
3099 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3100   assert(jthread->is_Java_thread(), "must be a Java thread");
3101   if (jthread->privileged_stack_top() == NULL) return false;
3102   if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3103     oop loader = jthread->privileged_stack_top()->class_loader();
3104     if (loader == NULL) return true;
3105     bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3106     if (trusted) return true;
3107   }
3108   return false;
3109 }
3110 
3111 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3112   JVMWrapper("JVM_CurrentLoadedClass");
3113   ResourceMark rm(THREAD);
3114 
3115   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3116     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3117     bool trusted = is_trusted_frame(thread, &vfst);
3118     if (trusted) return NULL;
3119 
3120     Method* m = vfst.method();
3121     if (!m->is_native()) {
3122       InstanceKlass* holder = m->method_holder();
3123       oop loader = holder->class_loader();
3124       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3125         return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3126       }
3127     }
3128   }
3129   return NULL;
3130 JVM_END
3131 
3132 
3133 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3134   JVMWrapper("JVM_CurrentClassLoader");
3135   ResourceMark rm(THREAD);
3136 
3137   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3138 
3139     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3140     bool trusted = is_trusted_frame(thread, &vfst);
3141     if (trusted) return NULL;
3142 
3143     Method* m = vfst.method();
3144     if (!m->is_native()) {
3145       InstanceKlass* holder = m->method_holder();
3146       assert(holder->is_klass(), "just checking");
3147       oop loader = holder->class_loader();
3148       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3149         return JNIHandles::make_local(env, loader);
3150       }
3151     }
3152   }
3153   return NULL;
3154 JVM_END
3155 
3156 
3157 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3158   JVMWrapper("JVM_GetClassContext");
3159   ResourceMark rm(THREAD);
3160   JvmtiVMObjectAllocEventCollector oam;
3161   vframeStream vfst(thread);
3162 
3163   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3164     // This must only be called from SecurityManager.getClassContext
3165     Method* m = vfst.method();
3166     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3167           m->name()->equals(vmSymbols::getClassContext_name()) &&
3168           m->signature()->equals(vmSymbols::void_class_array_signature()))) {
3169       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3170     }
3171   }
3172 
3173   // Collect method holders
3174   GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3175   for (; !vfst.at_end(); vfst.security_next()) {
3176     Method* m = vfst.method();
3177     // Native frames are not returned
3178     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3179       Klass* holder = m->method_holder();
3180       assert(holder->is_klass(), "just checking");
3181       klass_array->append(holder);
3182     }
3183   }
3184 
3185   // Create result array of type [Ljava/lang/Class;
3186   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3187   // Fill in mirrors corresponding to method holders
3188   for (int i = 0; i < klass_array->length(); i++) {
3189     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3190   }
3191 
3192   return (jobjectArray) JNIHandles::make_local(env, result);
3193 JVM_END
3194 
3195 
3196 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3197   JVMWrapper("JVM_ClassDepth");
3198   ResourceMark rm(THREAD);
3199   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3200   Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3201 
3202   const char* str = java_lang_String::as_utf8_string(class_name_str());
3203   TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3204   if (class_name_sym == NULL) {
3205     return -1;
3206   }
3207 
3208   int depth = 0;
3209 
3210   for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3211     if (!vfst.method()->is_native()) {
3212       InstanceKlass* holder = vfst.method()->method_holder();
3213       assert(holder->is_klass(), "just checking");
3214       if (holder->name()->equals(class_name_sym)) {
3215         return depth;
3216       }
3217       depth++;
3218     }
3219   }
3220   return -1;
3221 JVM_END
3222 
3223 
3224 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3225   JVMWrapper("JVM_ClassLoaderDepth");
3226   ResourceMark rm(THREAD);
3227   int depth = 0;
3228   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3229     // if a method in a class in a trusted loader is in a doPrivileged, return -1
3230     bool trusted = is_trusted_frame(thread, &vfst);
3231     if (trusted) return -1;
3232 
3233     Method* m = vfst.method();
3234     if (!m->is_native()) {
3235       InstanceKlass* holder = m->method_holder();
3236       assert(holder->is_klass(), "just checking");
3237       oop loader = holder->class_loader();
3238       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3239         return depth;
3240       }
3241       depth++;
3242     }
3243   }
3244   return -1;
3245 JVM_END
3246 
3247 
3248 // java.lang.Package ////////////////////////////////////////////////////////////////
3249 
3250 
3251 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3252   JVMWrapper("JVM_GetSystemPackage");
3253   ResourceMark rm(THREAD);
3254   JvmtiVMObjectAllocEventCollector oam;
3255   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3256   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3257   return (jstring) JNIHandles::make_local(result);
3258 JVM_END
3259 
3260 
3261 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3262   JVMWrapper("JVM_GetSystemPackages");
3263   JvmtiVMObjectAllocEventCollector oam;
3264   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3265   return (jobjectArray) JNIHandles::make_local(result);
3266 JVM_END
3267 
3268 
3269 // ObjectInputStream ///////////////////////////////////////////////////////////////
3270 
3271 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3272   if (current_class == NULL) {
3273     return true;
3274   }
3275   if ((current_class == field_class) || access.is_public()) {
3276     return true;
3277   }
3278 
3279   if (access.is_protected()) {
3280     // See if current_class is a subclass of field_class
3281     if (current_class->is_subclass_of(field_class)) {
3282       return true;
3283     }
3284   }
3285 
3286   return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3287 }
3288 
3289 // Return the first non-null class loader up the execution stack, or null
3290 // if only code from the null class loader is on the stack.
3291 
3292 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3293   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3294     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3295     oop loader = vfst.method()->method_holder()->class_loader();
3296     if (loader != NULL) {
3297       return JNIHandles::make_local(env, loader);
3298     }
3299   }
3300   return NULL;
3301 JVM_END
3302 
3303 
3304 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3305 
3306 
3307 // resolve array handle and check arguments
3308 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3309   if (arr == NULL) {
3310     THROW_0(vmSymbols::java_lang_NullPointerException());
3311   }
3312   oop a = JNIHandles::resolve_non_null(arr);
3313   if (!a->is_array()) {
3314     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3315   } else if (type_array_only && !a->is_typeArray()) {
3316     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3317   }
3318   return arrayOop(a);
3319 }
3320 
3321 
3322 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3323   JVMWrapper("JVM_GetArrayLength");
3324   arrayOop a = check_array(env, arr, false, CHECK_0);
3325   return a->length();
3326 JVM_END
3327 
3328 
3329 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3330   JVMWrapper("JVM_Array_Get");
3331   JvmtiVMObjectAllocEventCollector oam;
3332   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3333   jvalue value;
3334   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3335   oop box = Reflection::box(&value, type, CHECK_NULL);
3336   return JNIHandles::make_local(env, box);
3337 JVM_END
3338 
3339 
3340 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3341   JVMWrapper("JVM_GetPrimitiveArrayElement");
3342   jvalue value;
3343   value.i = 0; // to initialize value before getting used in CHECK
3344   arrayOop a = check_array(env, arr, true, CHECK_(value));
3345   assert(a->is_typeArray(), "just checking");
3346   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3347   BasicType wide_type = (BasicType) wCode;
3348   if (type != wide_type) {
3349     Reflection::widen(&value, type, wide_type, CHECK_(value));
3350   }
3351   return value;
3352 JVM_END
3353 
3354 
3355 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3356   JVMWrapper("JVM_SetArrayElement");
3357   arrayOop a = check_array(env, arr, false, CHECK);
3358   oop box = JNIHandles::resolve(val);
3359   jvalue value;
3360   value.i = 0; // to initialize value before getting used in CHECK
3361   BasicType value_type;
3362   if (a->is_objArray()) {
3363     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3364     value_type = Reflection::unbox_for_regular_object(box, &value);
3365   } else {
3366     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3367   }
3368   Reflection::array_set(&value, a, index, value_type, CHECK);
3369 JVM_END
3370 
3371 
3372 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3373   JVMWrapper("JVM_SetPrimitiveArrayElement");
3374   arrayOop a = check_array(env, arr, true, CHECK);
3375   assert(a->is_typeArray(), "just checking");
3376   BasicType value_type = (BasicType) vCode;
3377   Reflection::array_set(&v, a, index, value_type, CHECK);
3378 JVM_END
3379 
3380 
3381 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3382   JVMWrapper("JVM_NewArray");
3383   JvmtiVMObjectAllocEventCollector oam;
3384   oop element_mirror = JNIHandles::resolve(eltClass);
3385   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3386   return JNIHandles::make_local(env, result);
3387 JVM_END
3388 
3389 
3390 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3391   JVMWrapper("JVM_NewMultiArray");
3392   JvmtiVMObjectAllocEventCollector oam;
3393   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3394   oop element_mirror = JNIHandles::resolve(eltClass);
3395   assert(dim_array->is_typeArray(), "just checking");
3396   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3397   return JNIHandles::make_local(env, result);
3398 JVM_END
3399 
3400 
3401 // Library support ///////////////////////////////////////////////////////////////////////////
3402 
3403 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3404   //%note jvm_ct
3405   JVMWrapper2("JVM_LoadLibrary (%s)", name);
3406   char ebuf[1024];
3407   void *load_result;
3408   {
3409     ThreadToNativeFromVM ttnfvm(thread);
3410     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3411   }
3412   if (load_result == NULL) {
3413     char msg[1024];
3414     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3415     // Since 'ebuf' may contain a string encoded using
3416     // platform encoding scheme, we need to pass
3417     // Exceptions::unsafe_to_utf8 to the new_exception method
3418     // as the last argument. See bug 6367357.
3419     Handle h_exception =
3420       Exceptions::new_exception(thread,
3421                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3422                                 msg, Exceptions::unsafe_to_utf8);
3423 
3424     THROW_HANDLE_0(h_exception);
3425   }
3426   return load_result;
3427 JVM_END
3428 
3429 
3430 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3431   JVMWrapper("JVM_UnloadLibrary");
3432   os::dll_unload(handle);
3433 JVM_END
3434 
3435 
3436 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3437   JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3438   return os::dll_lookup(handle, name);
3439 JVM_END
3440 
3441 
3442 // JNI version ///////////////////////////////////////////////////////////////////////////////
3443 
3444 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3445   JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3446   return Threads::is_supported_jni_version_including_1_1(version);
3447 JVM_END
3448 
3449 
3450 // String support ///////////////////////////////////////////////////////////////////////////
3451 
3452 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3453   JVMWrapper("JVM_InternString");
3454   JvmtiVMObjectAllocEventCollector oam;
3455   if (str == NULL) return NULL;
3456   oop string = JNIHandles::resolve_non_null(str);
3457   oop result = StringTable::intern(string, CHECK_NULL);
3458   return (jstring) JNIHandles::make_local(env, result);
3459 JVM_END
3460 
3461 
3462 // Raw monitor support //////////////////////////////////////////////////////////////////////
3463 
3464 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3465 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3466 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3467 // that only works with java threads.
3468 
3469 
3470 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3471   VM_Exit::block_if_vm_exited();
3472   JVMWrapper("JVM_RawMonitorCreate");
3473   return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3474 }
3475 
3476 
3477 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3478   VM_Exit::block_if_vm_exited();
3479   JVMWrapper("JVM_RawMonitorDestroy");
3480   delete ((Mutex*) mon);
3481 }
3482 
3483 
3484 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3485   VM_Exit::block_if_vm_exited();
3486   JVMWrapper("JVM_RawMonitorEnter");
3487   ((Mutex*) mon)->jvm_raw_lock();
3488   return 0;
3489 }
3490 
3491 
3492 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3493   VM_Exit::block_if_vm_exited();
3494   JVMWrapper("JVM_RawMonitorExit");
3495   ((Mutex*) mon)->jvm_raw_unlock();
3496 }
3497 
3498 
3499 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3500 
3501 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3502                                     Handle loader, Handle protection_domain,
3503                                     jboolean throwError, TRAPS) {
3504   // Security Note:
3505   //   The Java level wrapper will perform the necessary security check allowing
3506   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
3507   //   the checkPackageAccess relative to the initiating class loader via the
3508   //   protection_domain. The protection_domain is passed as NULL by the java code
3509   //   if there is no security manager in 3-arg Class.forName().
3510   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3511 
3512   KlassHandle klass_handle(THREAD, klass);
3513   // Check if we should initialize the class
3514   if (init && klass_handle->oop_is_instance()) {
3515     klass_handle->initialize(CHECK_NULL);
3516   }
3517   return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3518 }
3519 
3520 
3521 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3522 
3523 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3524   JVMWrapper("JVM_InvokeMethod");
3525   Handle method_handle;
3526   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3527     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3528     Handle receiver(THREAD, JNIHandles::resolve(obj));
3529     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3530     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3531     jobject res = JNIHandles::make_local(env, result);
3532     if (JvmtiExport::should_post_vm_object_alloc()) {
3533       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3534       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3535       if (java_lang_Class::is_primitive(ret_type)) {
3536         // Only for primitive type vm allocates memory for java object.
3537         // See box() method.
3538         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3539       }
3540     }
3541     return res;
3542   } else {
3543     THROW_0(vmSymbols::java_lang_StackOverflowError());
3544   }
3545 JVM_END
3546 
3547 
3548 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3549   JVMWrapper("JVM_NewInstanceFromConstructor");
3550   oop constructor_mirror = JNIHandles::resolve(c);
3551   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3552   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3553   jobject res = JNIHandles::make_local(env, result);
3554   if (JvmtiExport::should_post_vm_object_alloc()) {
3555     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3556   }
3557   return res;
3558 JVM_END
3559 
3560 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3561 
3562 JVM_LEAF(jboolean, JVM_SupportsCX8())
3563   JVMWrapper("JVM_SupportsCX8");
3564   return VM_Version::supports_cx8();
3565 JVM_END
3566 
3567 // Returns an array of all live Thread objects (VM internal JavaThreads,
3568 // jvmti agent threads, and JNI attaching threads  are skipped)
3569 // See CR 6404306 regarding JNI attaching threads
3570 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3571   ResourceMark rm(THREAD);
3572   ThreadsListEnumerator tle(THREAD, false, false);
3573   JvmtiVMObjectAllocEventCollector oam;
3574 
3575   int num_threads = tle.num_threads();
3576   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3577   objArrayHandle threads_ah(THREAD, r);
3578 
3579   for (int i = 0; i < num_threads; i++) {
3580     Handle h = tle.get_threadObj(i);
3581     threads_ah->obj_at_put(i, h());
3582   }
3583 
3584   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3585 JVM_END
3586 
3587 
3588 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3589 // Return StackTraceElement[][], each element is the stack trace of a thread in
3590 // the corresponding entry in the given threads array
3591 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3592   JVMWrapper("JVM_DumpThreads");
3593   JvmtiVMObjectAllocEventCollector oam;
3594 
3595   // Check if threads is null
3596   if (threads == NULL) {
3597     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3598   }
3599 
3600   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3601   objArrayHandle ah(THREAD, a);
3602   int num_threads = ah->length();
3603   // check if threads is non-empty array
3604   if (num_threads == 0) {
3605     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3606   }
3607 
3608   // check if threads is not an array of objects of Thread class
3609   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3610   if (k != SystemDictionary::Thread_klass()) {
3611     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3612   }
3613 
3614   ResourceMark rm(THREAD);
3615 
3616   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3617   for (int i = 0; i < num_threads; i++) {
3618     oop thread_obj = ah->obj_at(i);
3619     instanceHandle h(THREAD, (instanceOop) thread_obj);
3620     thread_handle_array->append(h);
3621   }
3622 
3623   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3624   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3625 
3626 JVM_END
3627 
3628 // JVM monitoring and management support
3629 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3630   return Management::get_jmm_interface(version);
3631 JVM_END
3632 
3633 // com.sun.tools.attach.VirtualMachine agent properties support
3634 //
3635 // Initialize the agent properties with the properties maintained in the VM
3636 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3637   JVMWrapper("JVM_InitAgentProperties");
3638   ResourceMark rm;
3639 
3640   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3641 
3642   PUTPROP(props, "sun.java.command", Arguments::java_command());
3643   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3644   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3645   return properties;
3646 JVM_END
3647 
3648 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3649 {
3650   JVMWrapper("JVM_GetEnclosingMethodInfo");
3651   JvmtiVMObjectAllocEventCollector oam;
3652 
3653   if (ofClass == NULL) {
3654     return NULL;
3655   }
3656   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3657   // Special handling for primitive objects
3658   if (java_lang_Class::is_primitive(mirror())) {
3659     return NULL;
3660   }
3661   Klass* k = java_lang_Class::as_Klass(mirror());
3662   if (!k->oop_is_instance()) {
3663     return NULL;
3664   }
3665   instanceKlassHandle ik_h(THREAD, k);
3666   int encl_method_class_idx = ik_h->enclosing_method_class_index();
3667   if (encl_method_class_idx == 0) {
3668     return NULL;
3669   }
3670   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3671   objArrayHandle dest(THREAD, dest_o);
3672   Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3673   dest->obj_at_put(0, enc_k->java_mirror());
3674   int encl_method_method_idx = ik_h->enclosing_method_method_index();
3675   if (encl_method_method_idx != 0) {
3676     Symbol* sym = ik_h->constants()->symbol_at(
3677                         extract_low_short_from_int(
3678                           ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3679     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3680     dest->obj_at_put(1, str());
3681     sym = ik_h->constants()->symbol_at(
3682               extract_high_short_from_int(
3683                 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3684     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3685     dest->obj_at_put(2, str());
3686   }
3687   return (jobjectArray) JNIHandles::make_local(dest());
3688 }
3689 JVM_END
3690 
3691 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3692 {
3693   memset(info, 0, info_size);
3694 
3695   info->jvm_version = Abstract_VM_Version::jvm_version();
3696   info->update_version = 0;          /* 0 in HotSpot Express VM */
3697   info->special_update_version = 0;  /* 0 in HotSpot Express VM */
3698 
3699   // when we add a new capability in the jvm_version_info struct, we should also
3700   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3701   // counter defined in runtimeService.cpp.
3702   info->is_attachable = AttachListener::is_attach_supported();
3703 }
3704 JVM_END
--- EOF ---