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/shared/barrierSet.inline.hpp"
  33 #include "gc/shared/collectedHeap.inline.hpp"
  34 #include "interpreter/bytecode.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/method.hpp"
  40 #include "oops/objArrayKlass.hpp"
  41 #include "oops/objArrayOop.inline.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() == vmSymbols::java_lang_Class() &&
 167         vfst.method()->name() == vmSymbols::forName0_name()) {
 168       vfst.next();
 169       if (!vfst.at_end() &&
 170           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 171           vfst.method()->name() == vmSymbols::forName_name()) {
 172         vfst.next();
 173         found_it = true;
 174       }
 175     } else if (last_caller != NULL &&
 176                last_caller->method_holder()->name() ==
 177                vmSymbols::java_lang_ClassLoader() &&
 178                (last_caller->name() == vmSymbols::loadClassInternal_name() ||
 179                 last_caller->name() == 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 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1469 {
1470   oop mirror = JNIHandles::resolve_non_null(cls);
1471   if (java_lang_Class::is_primitive(mirror) ||
1472       !java_lang_Class::as_Klass(mirror)->oop_is_instance()) {
1473     return NULL;
1474   }
1475   instanceKlassHandle k(THREAD, InstanceKlass::cast(java_lang_Class::as_Klass(mirror)));
1476   int ooff = 0, noff = 0;
1477   if (InstanceKlass::find_inner_classes_attr(k, &ooff, &noff, THREAD)) {
1478     if (noff != 0) {
1479       constantPoolHandle i_cp(thread, k->constants());
1480       Symbol* name = i_cp->symbol_at(noff);
1481       Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1482       return (jstring) JNIHandles::make_local(env, str());
1483     }
1484   }
1485   return NULL;
1486 }
1487 JVM_END
1488 
1489 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1490   assert (cls != NULL, "illegal class");
1491   JVMWrapper("JVM_GetClassSignature");
1492   JvmtiVMObjectAllocEventCollector oam;
1493   ResourceMark rm(THREAD);
1494   // Return null for arrays and primatives
1495   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1496     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1497     if (k->oop_is_instance()) {
1498       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1499       if (sym == NULL) return NULL;
1500       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1501       return (jstring) JNIHandles::make_local(env, str());
1502     }
1503   }
1504   return NULL;
1505 JVM_END
1506 
1507 
1508 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1509   assert (cls != NULL, "illegal class");
1510   JVMWrapper("JVM_GetClassAnnotations");
1511 
1512   // Return null for arrays and primitives
1513   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1514     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1515     if (k->oop_is_instance()) {
1516       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1517       return (jbyteArray) JNIHandles::make_local(env, a);
1518     }
1519   }
1520   return NULL;
1521 JVM_END
1522 
1523 
1524 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1525   // some of this code was adapted from from jni_FromReflectedField
1526 
1527   oop reflected = JNIHandles::resolve_non_null(field);
1528   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1529   Klass* k    = java_lang_Class::as_Klass(mirror);
1530   int slot      = java_lang_reflect_Field::slot(reflected);
1531   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1532 
1533   KlassHandle kh(THREAD, k);
1534   intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1535 
1536   if (modifiers & JVM_ACC_STATIC) {
1537     // for static fields we only look in the current class
1538     if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1539       assert(false, "cannot find static field");
1540       return false;
1541     }
1542   } else {
1543     // for instance fields we start with the current class and work
1544     // our way up through the superclass chain
1545     if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1546       assert(false, "cannot find instance field");
1547       return false;
1548     }
1549   }
1550   return true;
1551 }
1552 
1553 static Method* jvm_get_method_common(jobject method) {
1554   // some of this code was adapted from from jni_FromReflectedMethod
1555 
1556   oop reflected = JNIHandles::resolve_non_null(method);
1557   oop mirror    = NULL;
1558   int slot      = 0;
1559 
1560   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1561     mirror = java_lang_reflect_Constructor::clazz(reflected);
1562     slot   = java_lang_reflect_Constructor::slot(reflected);
1563   } else {
1564     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1565            "wrong type");
1566     mirror = java_lang_reflect_Method::clazz(reflected);
1567     slot   = java_lang_reflect_Method::slot(reflected);
1568   }
1569   Klass* k = java_lang_Class::as_Klass(mirror);
1570 
1571   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1572   assert(m != NULL, "cannot find method");
1573   return m;  // caller has to deal with NULL in product mode
1574 }
1575 
1576 /* Type use annotations support (JDK 1.8) */
1577 
1578 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1579   assert (cls != NULL, "illegal class");
1580   JVMWrapper("JVM_GetClassTypeAnnotations");
1581   ResourceMark rm(THREAD);
1582   // Return null for arrays and primitives
1583   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1584     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1585     if (k->oop_is_instance()) {
1586       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1587       if (type_annotations != NULL) {
1588         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1589         return (jbyteArray) JNIHandles::make_local(env, a);
1590       }
1591     }
1592   }
1593   return NULL;
1594 JVM_END
1595 
1596 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1597   assert (method != NULL, "illegal method");
1598   JVMWrapper("JVM_GetMethodTypeAnnotations");
1599 
1600   // method is a handle to a java.lang.reflect.Method object
1601   Method* m = jvm_get_method_common(method);
1602   if (m == NULL) {
1603     return NULL;
1604   }
1605 
1606   AnnotationArray* type_annotations = m->type_annotations();
1607   if (type_annotations != NULL) {
1608     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1609     return (jbyteArray) JNIHandles::make_local(env, a);
1610   }
1611 
1612   return NULL;
1613 JVM_END
1614 
1615 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1616   assert (field != NULL, "illegal field");
1617   JVMWrapper("JVM_GetFieldTypeAnnotations");
1618 
1619   fieldDescriptor fd;
1620   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1621   if (!gotFd) {
1622     return NULL;
1623   }
1624 
1625   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1626 JVM_END
1627 
1628 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1629   if (!cp->is_within_bounds(index)) {
1630     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1631   }
1632 }
1633 
1634 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1635 {
1636   JVMWrapper("JVM_GetMethodParameters");
1637   // method is a handle to a java.lang.reflect.Method object
1638   Method* method_ptr = jvm_get_method_common(method);
1639   methodHandle mh (THREAD, method_ptr);
1640   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1641   const int num_params = mh->method_parameters_length();
1642 
1643   if (num_params < 0) {
1644     // A -1 return value from method_parameters_length means there is no
1645     // parameter data.  Return null to indicate this to the reflection
1646     // API.
1647     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1648     return (jobjectArray)NULL;
1649   } else {
1650     // Otherwise, we return something up to reflection, even if it is
1651     // a zero-length array.  Why?  Because in some cases this can
1652     // trigger a MalformedParametersException.
1653 
1654     // make sure all the symbols are properly formatted
1655     for (int i = 0; i < num_params; i++) {
1656       MethodParametersElement* params = mh->method_parameters_start();
1657       int index = params[i].name_cp_index;
1658       bounds_check(mh->constants(), index, CHECK_NULL);
1659 
1660       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1661         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1662                     "Wrong type at constant pool index");
1663       }
1664 
1665     }
1666 
1667     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1668     objArrayHandle result (THREAD, result_oop);
1669 
1670     for (int i = 0; i < num_params; i++) {
1671       MethodParametersElement* params = mh->method_parameters_start();
1672       // For a 0 index, give a NULL symbol
1673       Symbol* sym = 0 != params[i].name_cp_index ?
1674         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1675       int flags = params[i].flags;
1676       oop param = Reflection::new_parameter(reflected_method, i, sym,
1677                                             flags, CHECK_NULL);
1678       result->obj_at_put(i, param);
1679     }
1680     return (jobjectArray)JNIHandles::make_local(env, result());
1681   }
1682 }
1683 JVM_END
1684 
1685 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1686 
1687 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1688 {
1689   JVMWrapper("JVM_GetClassDeclaredFields");
1690   JvmtiVMObjectAllocEventCollector oam;
1691 
1692   // Exclude primitive types and array types
1693   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1694       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1695     // Return empty array
1696     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1697     return (jobjectArray) JNIHandles::make_local(env, res);
1698   }
1699 
1700   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1701   constantPoolHandle cp(THREAD, k->constants());
1702 
1703   // Ensure class is linked
1704   k->link_class(CHECK_NULL);
1705 
1706   // 4496456 We need to filter out java.lang.Throwable.backtrace
1707   bool skip_backtrace = false;
1708 
1709   // Allocate result
1710   int num_fields;
1711 
1712   if (publicOnly) {
1713     num_fields = 0;
1714     for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1715       if (fs.access_flags().is_public()) ++num_fields;
1716     }
1717   } else {
1718     num_fields = k->java_fields_count();
1719 
1720     if (k() == SystemDictionary::Throwable_klass()) {
1721       num_fields--;
1722       skip_backtrace = true;
1723     }
1724   }
1725 
1726   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1727   objArrayHandle result (THREAD, r);
1728 
1729   int out_idx = 0;
1730   fieldDescriptor fd;
1731   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1732     if (skip_backtrace) {
1733       // 4496456 skip java.lang.Throwable.backtrace
1734       int offset = fs.offset();
1735       if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1736     }
1737 
1738     if (!publicOnly || fs.access_flags().is_public()) {
1739       fd.reinitialize(k(), fs.index());
1740       oop field = Reflection::new_field(&fd, CHECK_NULL);
1741       result->obj_at_put(out_idx, field);
1742       ++out_idx;
1743     }
1744   }
1745   assert(out_idx == num_fields, "just checking");
1746   return (jobjectArray) JNIHandles::make_local(env, result());
1747 }
1748 JVM_END
1749 
1750 static bool select_method(methodHandle method, bool want_constructor) {
1751   if (want_constructor) {
1752     return (method->is_initializer() && !method->is_static());
1753   } else {
1754     return  (!method->is_initializer() && !method->is_overpass());
1755   }
1756 }
1757 
1758 static jobjectArray get_class_declared_methods_helper(
1759                                   JNIEnv *env,
1760                                   jclass ofClass, jboolean publicOnly,
1761                                   bool want_constructor,
1762                                   Klass* klass, TRAPS) {
1763 
1764   JvmtiVMObjectAllocEventCollector oam;
1765 
1766   // Exclude primitive types and array types
1767   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1768       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1769     // Return empty array
1770     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1771     return (jobjectArray) JNIHandles::make_local(env, res);
1772   }
1773 
1774   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1775 
1776   // Ensure class is linked
1777   k->link_class(CHECK_NULL);
1778 
1779   Array<Method*>* methods = k->methods();
1780   int methods_length = methods->length();
1781 
1782   // Save original method_idnum in case of redefinition, which can change
1783   // the idnum of obsolete methods.  The new method will have the same idnum
1784   // but if we refresh the methods array, the counts will be wrong.
1785   ResourceMark rm(THREAD);
1786   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1787   int num_methods = 0;
1788 
1789   for (int i = 0; i < methods_length; i++) {
1790     methodHandle method(THREAD, methods->at(i));
1791     if (select_method(method, want_constructor)) {
1792       if (!publicOnly || method->is_public()) {
1793         idnums->push(method->method_idnum());
1794         ++num_methods;
1795       }
1796     }
1797   }
1798 
1799   // Allocate result
1800   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1801   objArrayHandle result (THREAD, r);
1802 
1803   // Now just put the methods that we selected above, but go by their idnum
1804   // in case of redefinition.  The methods can be redefined at any safepoint,
1805   // so above when allocating the oop array and below when creating reflect
1806   // objects.
1807   for (int i = 0; i < num_methods; i++) {
1808     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1809     if (method.is_null()) {
1810       // Method may have been deleted and seems this API can handle null
1811       // Otherwise should probably put a method that throws NSME
1812       result->obj_at_put(i, NULL);
1813     } else {
1814       oop m;
1815       if (want_constructor) {
1816         m = Reflection::new_constructor(method, CHECK_NULL);
1817       } else {
1818         m = Reflection::new_method(method, false, CHECK_NULL);
1819       }
1820       result->obj_at_put(i, m);
1821     }
1822   }
1823 
1824   return (jobjectArray) JNIHandles::make_local(env, result());
1825 }
1826 
1827 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1828 {
1829   JVMWrapper("JVM_GetClassDeclaredMethods");
1830   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1831                                            /*want_constructor*/ false,
1832                                            SystemDictionary::reflect_Method_klass(), THREAD);
1833 }
1834 JVM_END
1835 
1836 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1837 {
1838   JVMWrapper("JVM_GetClassDeclaredConstructors");
1839   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1840                                            /*want_constructor*/ true,
1841                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
1842 }
1843 JVM_END
1844 
1845 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1846 {
1847   JVMWrapper("JVM_GetClassAccessFlags");
1848   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1849     // Primitive type
1850     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1851   }
1852 
1853   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1854   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1855 }
1856 JVM_END
1857 
1858 
1859 // Constant pool access //////////////////////////////////////////////////////////
1860 
1861 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1862 {
1863   JVMWrapper("JVM_GetClassConstantPool");
1864   JvmtiVMObjectAllocEventCollector oam;
1865 
1866   // Return null for primitives and arrays
1867   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1868     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1869     if (k->oop_is_instance()) {
1870       instanceKlassHandle k_h(THREAD, k);
1871       Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1872       sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1873       return JNIHandles::make_local(jcp());
1874     }
1875   }
1876   return NULL;
1877 }
1878 JVM_END
1879 
1880 
1881 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1882 {
1883   JVMWrapper("JVM_ConstantPoolGetSize");
1884   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1885   return cp->length();
1886 }
1887 JVM_END
1888 
1889 
1890 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1891 {
1892   JVMWrapper("JVM_ConstantPoolGetClassAt");
1893   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1894   bounds_check(cp, index, CHECK_NULL);
1895   constantTag tag = cp->tag_at(index);
1896   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1897     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1898   }
1899   Klass* k = cp->klass_at(index, CHECK_NULL);
1900   return (jclass) JNIHandles::make_local(k->java_mirror());
1901 }
1902 JVM_END
1903 
1904 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1905 {
1906   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1907   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1908   bounds_check(cp, index, CHECK_NULL);
1909   constantTag tag = cp->tag_at(index);
1910   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1911     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1912   }
1913   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1914   if (k == NULL) return NULL;
1915   return (jclass) JNIHandles::make_local(k->java_mirror());
1916 }
1917 JVM_END
1918 
1919 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1920   constantTag tag = cp->tag_at(index);
1921   if (!tag.is_method() && !tag.is_interface_method()) {
1922     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1923   }
1924   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1925   Klass* k_o;
1926   if (force_resolution) {
1927     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1928   } else {
1929     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1930     if (k_o == NULL) return NULL;
1931   }
1932   instanceKlassHandle k(THREAD, k_o);
1933   Symbol* name = cp->uncached_name_ref_at(index);
1934   Symbol* sig  = cp->uncached_signature_ref_at(index);
1935   methodHandle m (THREAD, k->find_method(name, sig));
1936   if (m.is_null()) {
1937     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1938   }
1939   oop method;
1940   if (!m->is_initializer() || m->is_static()) {
1941     method = Reflection::new_method(m, true, CHECK_NULL);
1942   } else {
1943     method = Reflection::new_constructor(m, CHECK_NULL);
1944   }
1945   return JNIHandles::make_local(method);
1946 }
1947 
1948 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1949 {
1950   JVMWrapper("JVM_ConstantPoolGetMethodAt");
1951   JvmtiVMObjectAllocEventCollector oam;
1952   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1953   bounds_check(cp, index, CHECK_NULL);
1954   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1955   return res;
1956 }
1957 JVM_END
1958 
1959 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1960 {
1961   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1962   JvmtiVMObjectAllocEventCollector oam;
1963   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1964   bounds_check(cp, index, CHECK_NULL);
1965   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1966   return res;
1967 }
1968 JVM_END
1969 
1970 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1971   constantTag tag = cp->tag_at(index);
1972   if (!tag.is_field()) {
1973     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1974   }
1975   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1976   Klass* k_o;
1977   if (force_resolution) {
1978     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1979   } else {
1980     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1981     if (k_o == NULL) return NULL;
1982   }
1983   instanceKlassHandle k(THREAD, k_o);
1984   Symbol* name = cp->uncached_name_ref_at(index);
1985   Symbol* sig  = cp->uncached_signature_ref_at(index);
1986   fieldDescriptor fd;
1987   Klass* target_klass = k->find_field(name, sig, &fd);
1988   if (target_klass == NULL) {
1989     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1990   }
1991   oop field = Reflection::new_field(&fd, CHECK_NULL);
1992   return JNIHandles::make_local(field);
1993 }
1994 
1995 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
1996 {
1997   JVMWrapper("JVM_ConstantPoolGetFieldAt");
1998   JvmtiVMObjectAllocEventCollector oam;
1999   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2000   bounds_check(cp, index, CHECK_NULL);
2001   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2002   return res;
2003 }
2004 JVM_END
2005 
2006 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2007 {
2008   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2009   JvmtiVMObjectAllocEventCollector oam;
2010   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2011   bounds_check(cp, index, CHECK_NULL);
2012   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2013   return res;
2014 }
2015 JVM_END
2016 
2017 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2018 {
2019   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2020   JvmtiVMObjectAllocEventCollector oam;
2021   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2022   bounds_check(cp, index, CHECK_NULL);
2023   constantTag tag = cp->tag_at(index);
2024   if (!tag.is_field_or_method()) {
2025     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2026   }
2027   int klass_ref = cp->uncached_klass_ref_index_at(index);
2028   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2029   Symbol*  member_name = cp->uncached_name_ref_at(index);
2030   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2031   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2032   objArrayHandle dest(THREAD, dest_o);
2033   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2034   dest->obj_at_put(0, str());
2035   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2036   dest->obj_at_put(1, str());
2037   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2038   dest->obj_at_put(2, str());
2039   return (jobjectArray) JNIHandles::make_local(dest());
2040 }
2041 JVM_END
2042 
2043 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2044 {
2045   JVMWrapper("JVM_ConstantPoolGetIntAt");
2046   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2047   bounds_check(cp, index, CHECK_0);
2048   constantTag tag = cp->tag_at(index);
2049   if (!tag.is_int()) {
2050     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2051   }
2052   return cp->int_at(index);
2053 }
2054 JVM_END
2055 
2056 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2057 {
2058   JVMWrapper("JVM_ConstantPoolGetLongAt");
2059   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2060   bounds_check(cp, index, CHECK_(0L));
2061   constantTag tag = cp->tag_at(index);
2062   if (!tag.is_long()) {
2063     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2064   }
2065   return cp->long_at(index);
2066 }
2067 JVM_END
2068 
2069 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2070 {
2071   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2072   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2073   bounds_check(cp, index, CHECK_(0.0f));
2074   constantTag tag = cp->tag_at(index);
2075   if (!tag.is_float()) {
2076     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2077   }
2078   return cp->float_at(index);
2079 }
2080 JVM_END
2081 
2082 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2083 {
2084   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2085   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2086   bounds_check(cp, index, CHECK_(0.0));
2087   constantTag tag = cp->tag_at(index);
2088   if (!tag.is_double()) {
2089     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2090   }
2091   return cp->double_at(index);
2092 }
2093 JVM_END
2094 
2095 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2096 {
2097   JVMWrapper("JVM_ConstantPoolGetStringAt");
2098   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2099   bounds_check(cp, index, CHECK_NULL);
2100   constantTag tag = cp->tag_at(index);
2101   if (!tag.is_string()) {
2102     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2103   }
2104   oop str = cp->string_at(index, CHECK_NULL);
2105   return (jstring) JNIHandles::make_local(str);
2106 }
2107 JVM_END
2108 
2109 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2110 {
2111   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2112   JvmtiVMObjectAllocEventCollector oam;
2113   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2114   bounds_check(cp, index, CHECK_NULL);
2115   constantTag tag = cp->tag_at(index);
2116   if (!tag.is_symbol()) {
2117     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2118   }
2119   Symbol* sym = cp->symbol_at(index);
2120   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2121   return (jstring) JNIHandles::make_local(str());
2122 }
2123 JVM_END
2124 
2125 
2126 // Assertion support. //////////////////////////////////////////////////////////
2127 
2128 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2129   JVMWrapper("JVM_DesiredAssertionStatus");
2130   assert(cls != NULL, "bad class");
2131 
2132   oop r = JNIHandles::resolve(cls);
2133   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2134   if (java_lang_Class::is_primitive(r)) return false;
2135 
2136   Klass* k = java_lang_Class::as_Klass(r);
2137   assert(k->oop_is_instance(), "must be an instance klass");
2138   if (! k->oop_is_instance()) return false;
2139 
2140   ResourceMark rm(THREAD);
2141   const char* name = k->name()->as_C_string();
2142   bool system_class = k->class_loader() == NULL;
2143   return JavaAssertions::enabled(name, system_class);
2144 
2145 JVM_END
2146 
2147 
2148 // Return a new AssertionStatusDirectives object with the fields filled in with
2149 // command-line assertion arguments (i.e., -ea, -da).
2150 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2151   JVMWrapper("JVM_AssertionStatusDirectives");
2152   JvmtiVMObjectAllocEventCollector oam;
2153   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2154   return JNIHandles::make_local(env, asd);
2155 JVM_END
2156 
2157 // Verification ////////////////////////////////////////////////////////////////////////////////
2158 
2159 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2160 
2161 // RedefineClasses support: bug 6214132 caused verification to fail.
2162 // All functions from this section should call the jvmtiThreadSate function:
2163 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2164 // The function returns a Klass* of the _scratch_class if the verifier
2165 // was invoked in the middle of the class redefinition.
2166 // Otherwise it returns its argument value which is the _the_class Klass*.
2167 // Please, refer to the description in the jvmtiThreadSate.hpp.
2168 
2169 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2170   JVMWrapper("JVM_GetClassNameUTF");
2171   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2172   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2173   return k->name()->as_utf8();
2174 JVM_END
2175 
2176 
2177 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2178   JVMWrapper("JVM_GetClassCPTypes");
2179   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2180   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2181   // types will have length zero if this is not an InstanceKlass
2182   // (length is determined by call to JVM_GetClassCPEntriesCount)
2183   if (k->oop_is_instance()) {
2184     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2185     for (int index = cp->length() - 1; index >= 0; index--) {
2186       constantTag tag = cp->tag_at(index);
2187       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2188   }
2189   }
2190 JVM_END
2191 
2192 
2193 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2194   JVMWrapper("JVM_GetClassCPEntriesCount");
2195   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2196   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2197   if (!k->oop_is_instance())
2198     return 0;
2199   return InstanceKlass::cast(k)->constants()->length();
2200 JVM_END
2201 
2202 
2203 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2204   JVMWrapper("JVM_GetClassFieldsCount");
2205   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2206   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2207   if (!k->oop_is_instance())
2208     return 0;
2209   return InstanceKlass::cast(k)->java_fields_count();
2210 JVM_END
2211 
2212 
2213 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2214   JVMWrapper("JVM_GetClassMethodsCount");
2215   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2216   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2217   if (!k->oop_is_instance())
2218     return 0;
2219   return InstanceKlass::cast(k)->methods()->length();
2220 JVM_END
2221 
2222 
2223 // The following methods, used for the verifier, are never called with
2224 // array klasses, so a direct cast to InstanceKlass is safe.
2225 // Typically, these methods are called in a loop with bounds determined
2226 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2227 // zero for arrays.
2228 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2229   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2230   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2231   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2232   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2233   int length = method->checked_exceptions_length();
2234   if (length > 0) {
2235     CheckedExceptionElement* table= method->checked_exceptions_start();
2236     for (int i = 0; i < length; i++) {
2237       exceptions[i] = table[i].class_cp_index;
2238     }
2239   }
2240 JVM_END
2241 
2242 
2243 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2244   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2245   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2246   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2247   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2248   return method->checked_exceptions_length();
2249 JVM_END
2250 
2251 
2252 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2253   JVMWrapper("JVM_GetMethodIxByteCode");
2254   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2255   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2256   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2257   memcpy(code, method->code_base(), method->code_size());
2258 JVM_END
2259 
2260 
2261 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2262   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2263   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2264   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2265   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2266   return method->code_size();
2267 JVM_END
2268 
2269 
2270 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2271   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2272   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2273   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2274   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2275   ExceptionTable extable(method);
2276   entry->start_pc   = extable.start_pc(entry_index);
2277   entry->end_pc     = extable.end_pc(entry_index);
2278   entry->handler_pc = extable.handler_pc(entry_index);
2279   entry->catchType  = extable.catch_type_index(entry_index);
2280 JVM_END
2281 
2282 
2283 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2284   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2285   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2286   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2287   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2288   return method->exception_table_length();
2289 JVM_END
2290 
2291 
2292 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2293   JVMWrapper("JVM_GetMethodIxModifiers");
2294   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2295   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2296   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2297   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2298 JVM_END
2299 
2300 
2301 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2302   JVMWrapper("JVM_GetFieldIxModifiers");
2303   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2304   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2305   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2306 JVM_END
2307 
2308 
2309 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2310   JVMWrapper("JVM_GetMethodIxLocalsCount");
2311   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2312   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2313   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2314   return method->max_locals();
2315 JVM_END
2316 
2317 
2318 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2319   JVMWrapper("JVM_GetMethodIxArgsSize");
2320   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2321   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2322   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2323   return method->size_of_parameters();
2324 JVM_END
2325 
2326 
2327 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2328   JVMWrapper("JVM_GetMethodIxMaxStack");
2329   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2330   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2331   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2332   return method->verifier_max_stack();
2333 JVM_END
2334 
2335 
2336 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2337   JVMWrapper("JVM_IsConstructorIx");
2338   ResourceMark rm(THREAD);
2339   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2340   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2341   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2342   return method->name() == vmSymbols::object_initializer_name();
2343 JVM_END
2344 
2345 
2346 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2347   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2348   ResourceMark rm(THREAD);
2349   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2350   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2351   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2352   return method->is_overpass();
2353 JVM_END
2354 
2355 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2356   JVMWrapper("JVM_GetMethodIxIxUTF");
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->name()->as_utf8();
2361 JVM_END
2362 
2363 
2364 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2365   JVMWrapper("JVM_GetMethodIxSignatureUTF");
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->signature()->as_utf8();
2370 JVM_END
2371 
2372 /**
2373  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2374  * read entries in the constant pool.  Since the old verifier always
2375  * works on a copy of the code, it will not see any rewriting that
2376  * may possibly occur in the middle of verification.  So it is important
2377  * that nothing it calls tries to use the cpCache instead of the raw
2378  * constant pool, so we must use cp->uncached_x methods when appropriate.
2379  */
2380 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2381   JVMWrapper("JVM_GetCPFieldNameUTF");
2382   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2383   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2384   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2385   switch (cp->tag_at(cp_index).value()) {
2386     case JVM_CONSTANT_Fieldref:
2387       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2388     default:
2389       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2390   }
2391   ShouldNotReachHere();
2392   return NULL;
2393 JVM_END
2394 
2395 
2396 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2397   JVMWrapper("JVM_GetCPMethodNameUTF");
2398   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2399   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2400   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2401   switch (cp->tag_at(cp_index).value()) {
2402     case JVM_CONSTANT_InterfaceMethodref:
2403     case JVM_CONSTANT_Methodref:
2404     case JVM_CONSTANT_NameAndType:  // for invokedynamic
2405       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2406     default:
2407       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2408   }
2409   ShouldNotReachHere();
2410   return NULL;
2411 JVM_END
2412 
2413 
2414 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2415   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2416   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2417   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2418   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2419   switch (cp->tag_at(cp_index).value()) {
2420     case JVM_CONSTANT_InterfaceMethodref:
2421     case JVM_CONSTANT_Methodref:
2422     case JVM_CONSTANT_NameAndType:  // for invokedynamic
2423       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2424     default:
2425       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2426   }
2427   ShouldNotReachHere();
2428   return NULL;
2429 JVM_END
2430 
2431 
2432 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2433   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2434   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2435   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2436   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2437   switch (cp->tag_at(cp_index).value()) {
2438     case JVM_CONSTANT_Fieldref:
2439       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2440     default:
2441       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2442   }
2443   ShouldNotReachHere();
2444   return NULL;
2445 JVM_END
2446 
2447 
2448 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2449   JVMWrapper("JVM_GetCPClassNameUTF");
2450   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2451   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2452   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2453   Symbol* classname = cp->klass_name_at(cp_index);
2454   return classname->as_utf8();
2455 JVM_END
2456 
2457 
2458 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2459   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2460   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2461   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2462   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2463   switch (cp->tag_at(cp_index).value()) {
2464     case JVM_CONSTANT_Fieldref: {
2465       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2466       Symbol* classname = cp->klass_name_at(class_index);
2467       return classname->as_utf8();
2468     }
2469     default:
2470       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2471   }
2472   ShouldNotReachHere();
2473   return NULL;
2474 JVM_END
2475 
2476 
2477 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2478   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2479   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2480   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2481   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2482   switch (cp->tag_at(cp_index).value()) {
2483     case JVM_CONSTANT_Methodref:
2484     case JVM_CONSTANT_InterfaceMethodref: {
2485       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2486       Symbol* classname = cp->klass_name_at(class_index);
2487       return classname->as_utf8();
2488     }
2489     default:
2490       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2491   }
2492   ShouldNotReachHere();
2493   return NULL;
2494 JVM_END
2495 
2496 
2497 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2498   JVMWrapper("JVM_GetCPFieldModifiers");
2499   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2500   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2501   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2502   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2503   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2504   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2505   switch (cp->tag_at(cp_index).value()) {
2506     case JVM_CONSTANT_Fieldref: {
2507       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2508       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2509       for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2510         if (fs.name() == name && fs.signature() == signature) {
2511           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2512         }
2513       }
2514       return -1;
2515     }
2516     default:
2517       fatal("JVM_GetCPFieldModifiers: illegal constant");
2518   }
2519   ShouldNotReachHere();
2520   return 0;
2521 JVM_END
2522 
2523 
2524 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2525   JVMWrapper("JVM_GetCPMethodModifiers");
2526   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2527   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2528   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2529   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2530   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2531   switch (cp->tag_at(cp_index).value()) {
2532     case JVM_CONSTANT_Methodref:
2533     case JVM_CONSTANT_InterfaceMethodref: {
2534       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2535       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2536       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2537       int methods_count = methods->length();
2538       for (int i = 0; i < methods_count; i++) {
2539         Method* method = methods->at(i);
2540         if (method->name() == name && method->signature() == signature) {
2541             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2542         }
2543       }
2544       return -1;
2545     }
2546     default:
2547       fatal("JVM_GetCPMethodModifiers: illegal constant");
2548   }
2549   ShouldNotReachHere();
2550   return 0;
2551 JVM_END
2552 
2553 
2554 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2555 
2556 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2557   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2558 JVM_END
2559 
2560 
2561 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2562   JVMWrapper("JVM_IsSameClassPackage");
2563   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2564   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2565   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2566   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2567   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2568 JVM_END
2569 
2570 // Printing support //////////////////////////////////////////////////
2571 extern "C" {
2572 
2573 ATTRIBUTE_PRINTF(3, 0)
2574 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2575   // see bug 4399518, 4417214
2576   if ((intptr_t)count <= 0) return -1;
2577 
2578   int result = vsnprintf(str, count, fmt, args);
2579   // Note: on truncation vsnprintf(3) on Unix returns numbers of
2580   // characters which would have been written had the buffer been large
2581   // enough; on Windows, it returns -1. We handle both cases here and
2582   // always return -1, and perform null termination.
2583   if ((result > 0 && (size_t)result >= count) || result == -1) {
2584     str[count - 1] = '\0';
2585     result = -1;
2586   }
2587 
2588   return result;
2589 }
2590 
2591 ATTRIBUTE_PRINTF(3, 0)
2592 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2593   va_list args;
2594   int len;
2595   va_start(args, fmt);
2596   len = jio_vsnprintf(str, count, fmt, args);
2597   va_end(args);
2598   return len;
2599 }
2600 
2601 ATTRIBUTE_PRINTF(2,3)
2602 int jio_fprintf(FILE* f, const char *fmt, ...) {
2603   int len;
2604   va_list args;
2605   va_start(args, fmt);
2606   len = jio_vfprintf(f, fmt, args);
2607   va_end(args);
2608   return len;
2609 }
2610 
2611 ATTRIBUTE_PRINTF(2, 0)
2612 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2613   if (Arguments::vfprintf_hook() != NULL) {
2614      return Arguments::vfprintf_hook()(f, fmt, args);
2615   } else {
2616     return vfprintf(f, fmt, args);
2617   }
2618 }
2619 
2620 ATTRIBUTE_PRINTF(1, 2)
2621 JNIEXPORT int jio_printf(const char *fmt, ...) {
2622   int len;
2623   va_list args;
2624   va_start(args, fmt);
2625   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2626   va_end(args);
2627   return len;
2628 }
2629 
2630 
2631 // HotSpot specific jio method
2632 void jio_print(const char* s) {
2633   // Try to make this function as atomic as possible.
2634   if (Arguments::vfprintf_hook() != NULL) {
2635     jio_fprintf(defaultStream::output_stream(), "%s", s);
2636   } else {
2637     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2638     size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2639   }
2640 }
2641 
2642 } // Extern C
2643 
2644 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2645 
2646 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2647 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2648 // OSThread objects.  The exception to this rule is when the target object is the thread
2649 // doing the operation, in which case we know that the thread won't exit until the
2650 // operation is done (all exits being voluntary).  There are a few cases where it is
2651 // rather silly to do operations on yourself, like resuming yourself or asking whether
2652 // you are alive.  While these can still happen, they are not subject to deadlocks if
2653 // the lock is held while the operation occurs (this is not the case for suspend, for
2654 // instance), and are very unlikely.  Because IsAlive needs to be fast and its
2655 // implementation is local to this file, we always lock Threads_lock for that one.
2656 
2657 static void thread_entry(JavaThread* thread, TRAPS) {
2658   HandleMark hm(THREAD);
2659   Handle obj(THREAD, thread->threadObj());
2660   JavaValue result(T_VOID);
2661   JavaCalls::call_virtual(&result,
2662                           obj,
2663                           KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2664                           vmSymbols::run_method_name(),
2665                           vmSymbols::void_method_signature(),
2666                           THREAD);
2667 }
2668 
2669 
2670 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2671   JVMWrapper("JVM_StartThread");
2672   JavaThread *native_thread = NULL;
2673 
2674   // We cannot hold the Threads_lock when we throw an exception,
2675   // due to rank ordering issues. Example:  we might need to grab the
2676   // Heap_lock while we construct the exception.
2677   bool throw_illegal_thread_state = false;
2678 
2679   // We must release the Threads_lock before we can post a jvmti event
2680   // in Thread::start.
2681   {
2682     // Ensure that the C++ Thread and OSThread structures aren't freed before
2683     // we operate.
2684     MutexLocker mu(Threads_lock);
2685 
2686     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2687     // re-starting an already started thread, so we should usually find
2688     // that the JavaThread is null. However for a JNI attached thread
2689     // there is a small window between the Thread object being created
2690     // (with its JavaThread set) and the update to its threadStatus, so we
2691     // have to check for this
2692     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2693       throw_illegal_thread_state = true;
2694     } else {
2695       // We could also check the stillborn flag to see if this thread was already stopped, but
2696       // for historical reasons we let the thread detect that itself when it starts running
2697 
2698       jlong size =
2699              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2700       // Allocate the C++ Thread structure and create the native thread.  The
2701       // stack size retrieved from java is signed, but the constructor takes
2702       // size_t (an unsigned type), so avoid passing negative values which would
2703       // result in really large stacks.
2704       size_t sz = size > 0 ? (size_t) size : 0;
2705       native_thread = new JavaThread(&thread_entry, sz);
2706 
2707       // At this point it may be possible that no osthread was created for the
2708       // JavaThread due to lack of memory. Check for this situation and throw
2709       // an exception if necessary. Eventually we may want to change this so
2710       // that we only grab the lock if the thread was created successfully -
2711       // then we can also do this check and throw the exception in the
2712       // JavaThread constructor.
2713       if (native_thread->osthread() != NULL) {
2714         // Note: the current thread is not being used within "prepare".
2715         native_thread->prepare(jthread);
2716       }
2717     }
2718   }
2719 
2720   if (throw_illegal_thread_state) {
2721     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2722   }
2723 
2724   assert(native_thread != NULL, "Starting null thread?");
2725 
2726   if (native_thread->osthread() == NULL) {
2727     // No one should hold a reference to the 'native_thread'.
2728     delete native_thread;
2729     if (JvmtiExport::should_post_resource_exhausted()) {
2730       JvmtiExport::post_resource_exhausted(
2731         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2732         os::native_thread_creation_failed_msg());
2733     }
2734     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2735               os::native_thread_creation_failed_msg());
2736   }
2737 
2738   Thread::start(native_thread);
2739 
2740 JVM_END
2741 
2742 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2743 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2744 // but is thought to be reliable and simple. In the case, where the receiver is the
2745 // same thread as the sender, no safepoint is needed.
2746 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2747   JVMWrapper("JVM_StopThread");
2748 
2749   oop java_throwable = JNIHandles::resolve(throwable);
2750   if (java_throwable == NULL) {
2751     THROW(vmSymbols::java_lang_NullPointerException());
2752   }
2753   oop java_thread = JNIHandles::resolve_non_null(jthread);
2754   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2755   Events::log_exception(JavaThread::current(),
2756                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2757                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
2758   // First check if thread is alive
2759   if (receiver != NULL) {
2760     // Check if exception is getting thrown at self (use oop equality, since the
2761     // target object might exit)
2762     if (java_thread == thread->threadObj()) {
2763       THROW_OOP(java_throwable);
2764     } else {
2765       // Enques a VM_Operation to stop all threads and then deliver the exception...
2766       Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2767     }
2768   }
2769   else {
2770     // Either:
2771     // - target thread has not been started before being stopped, or
2772     // - target thread already terminated
2773     // We could read the threadStatus to determine which case it is
2774     // but that is overkill as it doesn't matter. We must set the
2775     // stillborn flag for the first case, and if the thread has already
2776     // exited setting this flag has no affect
2777     java_lang_Thread::set_stillborn(java_thread);
2778   }
2779 JVM_END
2780 
2781 
2782 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2783   JVMWrapper("JVM_IsThreadAlive");
2784 
2785   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2786   return java_lang_Thread::is_alive(thread_oop);
2787 JVM_END
2788 
2789 
2790 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2791   JVMWrapper("JVM_SuspendThread");
2792   oop java_thread = JNIHandles::resolve_non_null(jthread);
2793   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2794 
2795   if (receiver != NULL) {
2796     // thread has run and has not exited (still on threads list)
2797 
2798     {
2799       MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2800       if (receiver->is_external_suspend()) {
2801         // Don't allow nested external suspend requests. We can't return
2802         // an error from this interface so just ignore the problem.
2803         return;
2804       }
2805       if (receiver->is_exiting()) { // thread is in the process of exiting
2806         return;
2807       }
2808       receiver->set_external_suspend();
2809     }
2810 
2811     // java_suspend() will catch threads in the process of exiting
2812     // and will ignore them.
2813     receiver->java_suspend();
2814 
2815     // It would be nice to have the following assertion in all the
2816     // time, but it is possible for a racing resume request to have
2817     // resumed this thread right after we suspended it. Temporarily
2818     // enable this assertion if you are chasing a different kind of
2819     // bug.
2820     //
2821     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2822     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2823   }
2824 JVM_END
2825 
2826 
2827 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2828   JVMWrapper("JVM_ResumeThread");
2829   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2830   // We need to *always* get the threads lock here, since this operation cannot be allowed during
2831   // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2832   // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2833   // looks at it.
2834   MutexLocker ml(Threads_lock);
2835   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2836   if (thr != NULL) {
2837     // the thread has run and is not in the process of exiting
2838     thr->java_resume();
2839   }
2840 JVM_END
2841 
2842 
2843 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2844   JVMWrapper("JVM_SetThreadPriority");
2845   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2846   MutexLocker ml(Threads_lock);
2847   oop java_thread = JNIHandles::resolve_non_null(jthread);
2848   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2849   JavaThread* thr = java_lang_Thread::thread(java_thread);
2850   if (thr != NULL) {                  // Thread not yet started; priority pushed down when it is
2851     Thread::set_priority(thr, (ThreadPriority)prio);
2852   }
2853 JVM_END
2854 
2855 
2856 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2857   JVMWrapper("JVM_Yield");
2858   if (os::dont_yield()) return;
2859   HOTSPOT_THREAD_YIELD();
2860 
2861   // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2862   // Critical for similar threading behaviour
2863   if (ConvertYieldToSleep) {
2864     os::sleep(thread, MinSleepInterval, false);
2865   } else {
2866     os::naked_yield();
2867   }
2868 JVM_END
2869 
2870 
2871 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2872   JVMWrapper("JVM_Sleep");
2873 
2874   if (millis < 0) {
2875     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2876   }
2877 
2878   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2879     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2880   }
2881 
2882   // Save current thread state and restore it at the end of this block.
2883   // And set new thread state to SLEEPING.
2884   JavaThreadSleepState jtss(thread);
2885 
2886   HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2887 
2888   EventThreadSleep event;
2889 
2890   if (millis == 0) {
2891     // When ConvertSleepToYield is on, this matches the classic VM implementation of
2892     // JVM_Sleep. Critical for similar threading behaviour (Win32)
2893     // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2894     // for SOLARIS
2895     if (ConvertSleepToYield) {
2896       os::naked_yield();
2897     } else {
2898       ThreadState old_state = thread->osthread()->get_state();
2899       thread->osthread()->set_state(SLEEPING);
2900       os::sleep(thread, MinSleepInterval, false);
2901       thread->osthread()->set_state(old_state);
2902     }
2903   } else {
2904     ThreadState old_state = thread->osthread()->get_state();
2905     thread->osthread()->set_state(SLEEPING);
2906     if (os::sleep(thread, millis, true) == OS_INTRPT) {
2907       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2908       // us while we were sleeping. We do not overwrite those.
2909       if (!HAS_PENDING_EXCEPTION) {
2910         if (event.should_commit()) {
2911           event.set_time(millis);
2912           event.commit();
2913         }
2914         HOTSPOT_THREAD_SLEEP_END(1);
2915 
2916         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2917         // to properly restore the thread state.  That's likely wrong.
2918         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2919       }
2920     }
2921     thread->osthread()->set_state(old_state);
2922   }
2923   if (event.should_commit()) {
2924     event.set_time(millis);
2925     event.commit();
2926   }
2927   HOTSPOT_THREAD_SLEEP_END(0);
2928 JVM_END
2929 
2930 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2931   JVMWrapper("JVM_CurrentThread");
2932   oop jthread = thread->threadObj();
2933   assert (thread != NULL, "no current thread!");
2934   return JNIHandles::make_local(env, jthread);
2935 JVM_END
2936 
2937 
2938 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2939   JVMWrapper("JVM_CountStackFrames");
2940 
2941   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2942   oop java_thread = JNIHandles::resolve_non_null(jthread);
2943   bool throw_illegal_thread_state = false;
2944   int count = 0;
2945 
2946   {
2947     MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2948     // We need to re-resolve the java_thread, since a GC might have happened during the
2949     // acquire of the lock
2950     JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2951 
2952     if (thr == NULL) {
2953       // do nothing
2954     } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2955       // Check whether this java thread has been suspended already. If not, throws
2956       // IllegalThreadStateException. We defer to throw that exception until
2957       // Threads_lock is released since loading exception class has to leave VM.
2958       // The correct way to test a thread is actually suspended is
2959       // wait_for_ext_suspend_completion(), but we can't call that while holding
2960       // the Threads_lock. The above tests are sufficient for our purposes
2961       // provided the walkability of the stack is stable - which it isn't
2962       // 100% but close enough for most practical purposes.
2963       throw_illegal_thread_state = true;
2964     } else {
2965       // Count all java activation, i.e., number of vframes
2966       for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2967         // Native frames are not counted
2968         if (!vfst.method()->is_native()) count++;
2969        }
2970     }
2971   }
2972 
2973   if (throw_illegal_thread_state) {
2974     THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2975                 "this thread is not suspended");
2976   }
2977   return count;
2978 JVM_END
2979 
2980 // Consider: A better way to implement JVM_Interrupt() is to acquire
2981 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2982 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2983 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2984 // outside the critical section.  Threads_lock is hot so we want to minimize
2985 // the hold-time.  A cleaner interface would be to decompose interrupt into
2986 // two steps.  The 1st phase, performed under Threads_lock, would return
2987 // a closure that'd be invoked after Threads_lock was dropped.
2988 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2989 // admit spurious wakeups.
2990 
2991 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2992   JVMWrapper("JVM_Interrupt");
2993 
2994   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2995   oop java_thread = JNIHandles::resolve_non_null(jthread);
2996   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2997   // We need to re-resolve the java_thread, since a GC might have happened during the
2998   // acquire of the lock
2999   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3000   if (thr != NULL) {
3001     Thread::interrupt(thr);
3002   }
3003 JVM_END
3004 
3005 
3006 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3007   JVMWrapper("JVM_IsInterrupted");
3008 
3009   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3010   oop java_thread = JNIHandles::resolve_non_null(jthread);
3011   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3012   // We need to re-resolve the java_thread, since a GC might have happened during the
3013   // acquire of the lock
3014   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3015   if (thr == NULL) {
3016     return JNI_FALSE;
3017   } else {
3018     return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3019   }
3020 JVM_END
3021 
3022 
3023 // Return true iff the current thread has locked the object passed in
3024 
3025 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3026   JVMWrapper("JVM_HoldsLock");
3027   assert(THREAD->is_Java_thread(), "sanity check");
3028   if (obj == NULL) {
3029     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3030   }
3031   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3032   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3033 JVM_END
3034 
3035 
3036 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3037   JVMWrapper("JVM_DumpAllStacks");
3038   VM_PrintThreads op;
3039   VMThread::execute(&op);
3040   if (JvmtiExport::should_post_data_dump()) {
3041     JvmtiExport::post_data_dump();
3042   }
3043 JVM_END
3044 
3045 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3046   JVMWrapper("JVM_SetNativeThreadName");
3047   ResourceMark rm(THREAD);
3048   oop java_thread = JNIHandles::resolve_non_null(jthread);
3049   JavaThread* thr = java_lang_Thread::thread(java_thread);
3050   // Thread naming only supported for the current thread, doesn't work for
3051   // target threads.
3052   if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3053     // we don't set the name of an attached thread to avoid stepping
3054     // on other programs
3055     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3056     os::set_native_thread_name(thread_name);
3057   }
3058 JVM_END
3059 
3060 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3061 
3062 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3063   assert(jthread->is_Java_thread(), "must be a Java thread");
3064   if (jthread->privileged_stack_top() == NULL) return false;
3065   if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3066     oop loader = jthread->privileged_stack_top()->class_loader();
3067     if (loader == NULL) return true;
3068     bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3069     if (trusted) return true;
3070   }
3071   return false;
3072 }
3073 
3074 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3075   JVMWrapper("JVM_CurrentLoadedClass");
3076   ResourceMark rm(THREAD);
3077 
3078   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3079     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3080     bool trusted = is_trusted_frame(thread, &vfst);
3081     if (trusted) return NULL;
3082 
3083     Method* m = vfst.method();
3084     if (!m->is_native()) {
3085       InstanceKlass* holder = m->method_holder();
3086       oop loader = holder->class_loader();
3087       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3088         return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3089       }
3090     }
3091   }
3092   return NULL;
3093 JVM_END
3094 
3095 
3096 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3097   JVMWrapper("JVM_CurrentClassLoader");
3098   ResourceMark rm(THREAD);
3099 
3100   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3101 
3102     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3103     bool trusted = is_trusted_frame(thread, &vfst);
3104     if (trusted) return NULL;
3105 
3106     Method* m = vfst.method();
3107     if (!m->is_native()) {
3108       InstanceKlass* holder = m->method_holder();
3109       assert(holder->is_klass(), "just checking");
3110       oop loader = holder->class_loader();
3111       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3112         return JNIHandles::make_local(env, loader);
3113       }
3114     }
3115   }
3116   return NULL;
3117 JVM_END
3118 
3119 
3120 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3121   JVMWrapper("JVM_GetClassContext");
3122   ResourceMark rm(THREAD);
3123   JvmtiVMObjectAllocEventCollector oam;
3124   vframeStream vfst(thread);
3125 
3126   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3127     // This must only be called from SecurityManager.getClassContext
3128     Method* m = vfst.method();
3129     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3130           m->name()          == vmSymbols::getClassContext_name() &&
3131           m->signature()     == vmSymbols::void_class_array_signature())) {
3132       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3133     }
3134   }
3135 
3136   // Collect method holders
3137   GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3138   for (; !vfst.at_end(); vfst.security_next()) {
3139     Method* m = vfst.method();
3140     // Native frames are not returned
3141     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3142       Klass* holder = m->method_holder();
3143       assert(holder->is_klass(), "just checking");
3144       klass_array->append(holder);
3145     }
3146   }
3147 
3148   // Create result array of type [Ljava/lang/Class;
3149   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3150   // Fill in mirrors corresponding to method holders
3151   for (int i = 0; i < klass_array->length(); i++) {
3152     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3153   }
3154 
3155   return (jobjectArray) JNIHandles::make_local(env, result);
3156 JVM_END
3157 
3158 
3159 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3160   JVMWrapper("JVM_ClassDepth");
3161   ResourceMark rm(THREAD);
3162   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3163   Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3164 
3165   const char* str = java_lang_String::as_utf8_string(class_name_str());
3166   TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3167   if (class_name_sym == NULL) {
3168     return -1;
3169   }
3170 
3171   int depth = 0;
3172 
3173   for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3174     if (!vfst.method()->is_native()) {
3175       InstanceKlass* holder = vfst.method()->method_holder();
3176       assert(holder->is_klass(), "just checking");
3177       if (holder->name() == class_name_sym) {
3178         return depth;
3179       }
3180       depth++;
3181     }
3182   }
3183   return -1;
3184 JVM_END
3185 
3186 
3187 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3188   JVMWrapper("JVM_ClassLoaderDepth");
3189   ResourceMark rm(THREAD);
3190   int depth = 0;
3191   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3192     // if a method in a class in a trusted loader is in a doPrivileged, return -1
3193     bool trusted = is_trusted_frame(thread, &vfst);
3194     if (trusted) return -1;
3195 
3196     Method* m = vfst.method();
3197     if (!m->is_native()) {
3198       InstanceKlass* holder = m->method_holder();
3199       assert(holder->is_klass(), "just checking");
3200       oop loader = holder->class_loader();
3201       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3202         return depth;
3203       }
3204       depth++;
3205     }
3206   }
3207   return -1;
3208 JVM_END
3209 
3210 
3211 // java.lang.Package ////////////////////////////////////////////////////////////////
3212 
3213 
3214 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3215   JVMWrapper("JVM_GetSystemPackage");
3216   ResourceMark rm(THREAD);
3217   JvmtiVMObjectAllocEventCollector oam;
3218   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3219   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3220   return (jstring) JNIHandles::make_local(result);
3221 JVM_END
3222 
3223 
3224 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3225   JVMWrapper("JVM_GetSystemPackages");
3226   JvmtiVMObjectAllocEventCollector oam;
3227   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3228   return (jobjectArray) JNIHandles::make_local(result);
3229 JVM_END
3230 
3231 
3232 // ObjectInputStream ///////////////////////////////////////////////////////////////
3233 
3234 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3235   if (current_class == NULL) {
3236     return true;
3237   }
3238   if ((current_class == field_class) || access.is_public()) {
3239     return true;
3240   }
3241 
3242   if (access.is_protected()) {
3243     // See if current_class is a subclass of field_class
3244     if (current_class->is_subclass_of(field_class)) {
3245       return true;
3246     }
3247   }
3248 
3249   return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3250 }
3251 
3252 // Return the first non-null class loader up the execution stack, or null
3253 // if only code from the null class loader is on the stack.
3254 
3255 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3256   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3257     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3258     oop loader = vfst.method()->method_holder()->class_loader();
3259     if (loader != NULL) {
3260       return JNIHandles::make_local(env, loader);
3261     }
3262   }
3263   return NULL;
3264 JVM_END
3265 
3266 
3267 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3268 
3269 
3270 // resolve array handle and check arguments
3271 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3272   if (arr == NULL) {
3273     THROW_0(vmSymbols::java_lang_NullPointerException());
3274   }
3275   oop a = JNIHandles::resolve_non_null(arr);
3276   if (!a->is_array()) {
3277     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3278   } else if (type_array_only && !a->is_typeArray()) {
3279     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3280   }
3281   return arrayOop(a);
3282 }
3283 
3284 
3285 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3286   JVMWrapper("JVM_GetArrayLength");
3287   arrayOop a = check_array(env, arr, false, CHECK_0);
3288   return a->length();
3289 JVM_END
3290 
3291 
3292 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3293   JVMWrapper("JVM_Array_Get");
3294   JvmtiVMObjectAllocEventCollector oam;
3295   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3296   jvalue value;
3297   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3298   oop box = Reflection::box(&value, type, CHECK_NULL);
3299   return JNIHandles::make_local(env, box);
3300 JVM_END
3301 
3302 
3303 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3304   JVMWrapper("JVM_GetPrimitiveArrayElement");
3305   jvalue value;
3306   value.i = 0; // to initialize value before getting used in CHECK
3307   arrayOop a = check_array(env, arr, true, CHECK_(value));
3308   assert(a->is_typeArray(), "just checking");
3309   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3310   BasicType wide_type = (BasicType) wCode;
3311   if (type != wide_type) {
3312     Reflection::widen(&value, type, wide_type, CHECK_(value));
3313   }
3314   return value;
3315 JVM_END
3316 
3317 
3318 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3319   JVMWrapper("JVM_SetArrayElement");
3320   arrayOop a = check_array(env, arr, false, CHECK);
3321   oop box = JNIHandles::resolve(val);
3322   jvalue value;
3323   value.i = 0; // to initialize value before getting used in CHECK
3324   BasicType value_type;
3325   if (a->is_objArray()) {
3326     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3327     value_type = Reflection::unbox_for_regular_object(box, &value);
3328   } else {
3329     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3330   }
3331   Reflection::array_set(&value, a, index, value_type, CHECK);
3332 JVM_END
3333 
3334 
3335 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3336   JVMWrapper("JVM_SetPrimitiveArrayElement");
3337   arrayOop a = check_array(env, arr, true, CHECK);
3338   assert(a->is_typeArray(), "just checking");
3339   BasicType value_type = (BasicType) vCode;
3340   Reflection::array_set(&v, a, index, value_type, CHECK);
3341 JVM_END
3342 
3343 
3344 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3345   JVMWrapper("JVM_NewArray");
3346   JvmtiVMObjectAllocEventCollector oam;
3347   oop element_mirror = JNIHandles::resolve(eltClass);
3348   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3349   return JNIHandles::make_local(env, result);
3350 JVM_END
3351 
3352 
3353 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3354   JVMWrapper("JVM_NewMultiArray");
3355   JvmtiVMObjectAllocEventCollector oam;
3356   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3357   oop element_mirror = JNIHandles::resolve(eltClass);
3358   assert(dim_array->is_typeArray(), "just checking");
3359   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3360   return JNIHandles::make_local(env, result);
3361 JVM_END
3362 
3363 
3364 // Library support ///////////////////////////////////////////////////////////////////////////
3365 
3366 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3367   //%note jvm_ct
3368   JVMWrapper2("JVM_LoadLibrary (%s)", name);
3369   char ebuf[1024];
3370   void *load_result;
3371   {
3372     ThreadToNativeFromVM ttnfvm(thread);
3373     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3374   }
3375   if (load_result == NULL) {
3376     char msg[1024];
3377     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3378     // Since 'ebuf' may contain a string encoded using
3379     // platform encoding scheme, we need to pass
3380     // Exceptions::unsafe_to_utf8 to the new_exception method
3381     // as the last argument. See bug 6367357.
3382     Handle h_exception =
3383       Exceptions::new_exception(thread,
3384                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3385                                 msg, Exceptions::unsafe_to_utf8);
3386 
3387     THROW_HANDLE_0(h_exception);
3388   }
3389   return load_result;
3390 JVM_END
3391 
3392 
3393 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3394   JVMWrapper("JVM_UnloadLibrary");
3395   os::dll_unload(handle);
3396 JVM_END
3397 
3398 
3399 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3400   JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3401   return os::dll_lookup(handle, name);
3402 JVM_END
3403 
3404 
3405 // JNI version ///////////////////////////////////////////////////////////////////////////////
3406 
3407 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3408   JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3409   return Threads::is_supported_jni_version_including_1_1(version);
3410 JVM_END
3411 
3412 
3413 // String support ///////////////////////////////////////////////////////////////////////////
3414 
3415 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3416   JVMWrapper("JVM_InternString");
3417   JvmtiVMObjectAllocEventCollector oam;
3418   if (str == NULL) return NULL;
3419   oop string = JNIHandles::resolve_non_null(str);
3420   oop result = StringTable::intern(string, CHECK_NULL);
3421   return (jstring) JNIHandles::make_local(env, result);
3422 JVM_END
3423 
3424 
3425 // Raw monitor support //////////////////////////////////////////////////////////////////////
3426 
3427 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3428 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3429 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3430 // that only works with java threads.
3431 
3432 
3433 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3434   VM_Exit::block_if_vm_exited();
3435   JVMWrapper("JVM_RawMonitorCreate");
3436   return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3437 }
3438 
3439 
3440 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3441   VM_Exit::block_if_vm_exited();
3442   JVMWrapper("JVM_RawMonitorDestroy");
3443   delete ((Mutex*) mon);
3444 }
3445 
3446 
3447 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3448   VM_Exit::block_if_vm_exited();
3449   JVMWrapper("JVM_RawMonitorEnter");
3450   ((Mutex*) mon)->jvm_raw_lock();
3451   return 0;
3452 }
3453 
3454 
3455 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3456   VM_Exit::block_if_vm_exited();
3457   JVMWrapper("JVM_RawMonitorExit");
3458   ((Mutex*) mon)->jvm_raw_unlock();
3459 }
3460 
3461 
3462 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3463 
3464 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3465                                     Handle loader, Handle protection_domain,
3466                                     jboolean throwError, TRAPS) {
3467   // Security Note:
3468   //   The Java level wrapper will perform the necessary security check allowing
3469   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
3470   //   the checkPackageAccess relative to the initiating class loader via the
3471   //   protection_domain. The protection_domain is passed as NULL by the java code
3472   //   if there is no security manager in 3-arg Class.forName().
3473   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3474 
3475   KlassHandle klass_handle(THREAD, klass);
3476   // Check if we should initialize the class
3477   if (init && klass_handle->oop_is_instance()) {
3478     klass_handle->initialize(CHECK_NULL);
3479   }
3480   return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3481 }
3482 
3483 
3484 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3485 
3486 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3487   JVMWrapper("JVM_InvokeMethod");
3488   Handle method_handle;
3489   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3490     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3491     Handle receiver(THREAD, JNIHandles::resolve(obj));
3492     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3493     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3494     jobject res = JNIHandles::make_local(env, result);
3495     if (JvmtiExport::should_post_vm_object_alloc()) {
3496       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3497       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3498       if (java_lang_Class::is_primitive(ret_type)) {
3499         // Only for primitive type vm allocates memory for java object.
3500         // See box() method.
3501         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3502       }
3503     }
3504     return res;
3505   } else {
3506     THROW_0(vmSymbols::java_lang_StackOverflowError());
3507   }
3508 JVM_END
3509 
3510 
3511 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3512   JVMWrapper("JVM_NewInstanceFromConstructor");
3513   oop constructor_mirror = JNIHandles::resolve(c);
3514   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3515   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3516   jobject res = JNIHandles::make_local(env, result);
3517   if (JvmtiExport::should_post_vm_object_alloc()) {
3518     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3519   }
3520   return res;
3521 JVM_END
3522 
3523 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3524 
3525 JVM_LEAF(jboolean, JVM_SupportsCX8())
3526   JVMWrapper("JVM_SupportsCX8");
3527   return VM_Version::supports_cx8();
3528 JVM_END
3529 
3530 // Returns an array of all live Thread objects (VM internal JavaThreads,
3531 // jvmti agent threads, and JNI attaching threads  are skipped)
3532 // See CR 6404306 regarding JNI attaching threads
3533 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3534   ResourceMark rm(THREAD);
3535   ThreadsListEnumerator tle(THREAD, false, false);
3536   JvmtiVMObjectAllocEventCollector oam;
3537 
3538   int num_threads = tle.num_threads();
3539   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3540   objArrayHandle threads_ah(THREAD, r);
3541 
3542   for (int i = 0; i < num_threads; i++) {
3543     Handle h = tle.get_threadObj(i);
3544     threads_ah->obj_at_put(i, h());
3545   }
3546 
3547   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3548 JVM_END
3549 
3550 
3551 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3552 // Return StackTraceElement[][], each element is the stack trace of a thread in
3553 // the corresponding entry in the given threads array
3554 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3555   JVMWrapper("JVM_DumpThreads");
3556   JvmtiVMObjectAllocEventCollector oam;
3557 
3558   // Check if threads is null
3559   if (threads == NULL) {
3560     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3561   }
3562 
3563   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3564   objArrayHandle ah(THREAD, a);
3565   int num_threads = ah->length();
3566   // check if threads is non-empty array
3567   if (num_threads == 0) {
3568     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3569   }
3570 
3571   // check if threads is not an array of objects of Thread class
3572   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3573   if (k != SystemDictionary::Thread_klass()) {
3574     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3575   }
3576 
3577   ResourceMark rm(THREAD);
3578 
3579   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3580   for (int i = 0; i < num_threads; i++) {
3581     oop thread_obj = ah->obj_at(i);
3582     instanceHandle h(THREAD, (instanceOop) thread_obj);
3583     thread_handle_array->append(h);
3584   }
3585 
3586   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3587   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3588 
3589 JVM_END
3590 
3591 // JVM monitoring and management support
3592 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3593   return Management::get_jmm_interface(version);
3594 JVM_END
3595 
3596 // com.sun.tools.attach.VirtualMachine agent properties support
3597 //
3598 // Initialize the agent properties with the properties maintained in the VM
3599 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3600   JVMWrapper("JVM_InitAgentProperties");
3601   ResourceMark rm;
3602 
3603   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3604 
3605   PUTPROP(props, "sun.java.command", Arguments::java_command());
3606   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3607   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3608   return properties;
3609 JVM_END
3610 
3611 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3612 {
3613   JVMWrapper("JVM_GetEnclosingMethodInfo");
3614   JvmtiVMObjectAllocEventCollector oam;
3615 
3616   if (ofClass == NULL) {
3617     return NULL;
3618   }
3619   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3620   // Special handling for primitive objects
3621   if (java_lang_Class::is_primitive(mirror())) {
3622     return NULL;
3623   }
3624   Klass* k = java_lang_Class::as_Klass(mirror());
3625   if (!k->oop_is_instance()) {
3626     return NULL;
3627   }
3628   instanceKlassHandle ik_h(THREAD, k);
3629   int encl_method_class_idx = ik_h->enclosing_method_class_index();
3630   if (encl_method_class_idx == 0) {
3631     return NULL;
3632   }
3633   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3634   objArrayHandle dest(THREAD, dest_o);
3635   Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3636   dest->obj_at_put(0, enc_k->java_mirror());
3637   int encl_method_method_idx = ik_h->enclosing_method_method_index();
3638   if (encl_method_method_idx != 0) {
3639     Symbol* sym = ik_h->constants()->symbol_at(
3640                         extract_low_short_from_int(
3641                           ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3642     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3643     dest->obj_at_put(1, str());
3644     sym = ik_h->constants()->symbol_at(
3645               extract_high_short_from_int(
3646                 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3647     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3648     dest->obj_at_put(2, str());
3649   }
3650   return (jobjectArray) JNIHandles::make_local(dest());
3651 }
3652 JVM_END
3653 
3654 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3655 {
3656   memset(info, 0, info_size);
3657 
3658   info->jvm_version = Abstract_VM_Version::jvm_version();
3659   info->update_version = 0;          /* 0 in HotSpot Express VM */
3660   info->special_update_version = 0;  /* 0 in HotSpot Express VM */
3661 
3662   // when we add a new capability in the jvm_version_info struct, we should also
3663   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3664   // counter defined in runtimeService.cpp.
3665   info->is_attachable = AttachListener::is_attach_supported();
3666 }
3667 JVM_END
--- EOF ---