1 /*
   2  * Copyright (c) 1997, 2017, 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/classFileStream.hpp"
  27 #include "classfile/classLoader.hpp"
  28 #include "classfile/classLoaderData.inline.hpp"
  29 #include "classfile/javaAssertions.hpp"
  30 #include "classfile/javaClasses.inline.hpp"
  31 #include "classfile/moduleEntry.hpp"
  32 #include "classfile/modules.hpp"
  33 #include "classfile/packageEntry.hpp"
  34 #include "classfile/stringTable.hpp"
  35 #include "classfile/systemDictionary.hpp"
  36 #include "classfile/vmSymbols.hpp"
  37 #include "gc/shared/barrierSet.inline.hpp"
  38 #include "gc/shared/collectedHeap.inline.hpp"
  39 #include "interpreter/bytecode.hpp"
  40 #include "memory/oopFactory.hpp"
  41 #include "memory/resourceArea.hpp"
  42 #include "memory/universe.inline.hpp"
  43 #include "oops/fieldStreams.hpp"
  44 #include "oops/instanceKlass.hpp"
  45 #include "oops/method.hpp"
  46 #include "oops/objArrayKlass.hpp"
  47 #include "oops/objArrayOop.inline.hpp"
  48 #include "oops/oop.inline.hpp"
  49 #include "prims/jvm.h"
  50 #include "prims/jvm_misc.hpp"
  51 #include "prims/jvmtiExport.hpp"
  52 #include "prims/jvmtiThreadState.hpp"
  53 #include "prims/nativeLookup.hpp"
  54 #include "prims/privilegedStack.hpp"
  55 #include "prims/stackwalk.hpp"
  56 #include "runtime/arguments.hpp"
  57 #include "runtime/atomic.hpp"
  58 #include "runtime/handles.inline.hpp"
  59 #include "runtime/init.hpp"
  60 #include "runtime/interfaceSupport.hpp"
  61 #include "runtime/java.hpp"
  62 #include "runtime/javaCalls.hpp"
  63 #include "runtime/jfieldIDWorkaround.hpp"
  64 #include "runtime/orderAccess.inline.hpp"
  65 #include "runtime/os.inline.hpp"
  66 #include "runtime/perfData.hpp"
  67 #include "runtime/reflection.hpp"
  68 #include "runtime/thread.inline.hpp"
  69 #include "runtime/vframe.hpp"
  70 #include "runtime/vm_operations.hpp"
  71 #include "runtime/vm_version.hpp"
  72 #include "services/attachListener.hpp"
  73 #include "services/management.hpp"
  74 #include "services/threadService.hpp"
  75 #include "trace/tracing.hpp"
  76 #include "utilities/copy.hpp"
  77 #include "utilities/defaultStream.hpp"
  78 #include "utilities/dtrace.hpp"
  79 #include "utilities/events.hpp"
  80 #include "utilities/histogram.hpp"
  81 #include "utilities/macros.hpp"
  82 #include "utilities/utf8.hpp"
  83 #if INCLUDE_CDS
  84 #include "classfile/sharedClassUtil.hpp"
  85 #include "classfile/systemDictionaryShared.hpp"
  86 #endif
  87 
  88 #include <errno.h>
  89 
  90 /*
  91   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
  92   such ctors and calls MUST NOT come between an oop declaration/init and its
  93   usage because if objects are move this may cause various memory stomps, bus
  94   errors and segfaults. Here is a cookbook for causing so called "naked oop
  95   failures":
  96 
  97       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
  98           JVMWrapper("JVM_GetClassDeclaredFields");
  99 
 100           // Object address to be held directly in mirror & not visible to GC
 101           oop mirror = JNIHandles::resolve_non_null(ofClass);
 102 
 103           // If this ctor can hit a safepoint, moving objects around, then
 104           ComplexConstructor foo;
 105 
 106           // Boom! mirror may point to JUNK instead of the intended object
 107           (some dereference of mirror)
 108 
 109           // Here's another call that may block for GC, making mirror stale
 110           MutexLocker ml(some_lock);
 111 
 112           // And here's an initializer that can result in a stale oop
 113           // all in one step.
 114           oop o = call_that_can_throw_exception(TRAPS);
 115 
 116 
 117   The solution is to keep the oop declaration BELOW the ctor or function
 118   call that might cause a GC, do another resolve to reassign the oop, or
 119   consider use of a Handle instead of an oop so there is immunity from object
 120   motion. But note that the "QUICK" entries below do not have a handlemark
 121   and thus can only support use of handles passed in.
 122 */
 123 
 124 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
 125   ResourceMark rm;
 126   int line_number = -1;
 127   const char * source_file = NULL;
 128   const char * trace = "explicit";
 129   InstanceKlass* caller = NULL;
 130   JavaThread* jthread = JavaThread::current();
 131   if (jthread->has_last_Java_frame()) {
 132     vframeStream vfst(jthread);
 133 
 134     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
 135     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
 136     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
 137     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
 138     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
 139 
 140     Method* last_caller = NULL;
 141 
 142     while (!vfst.at_end()) {
 143       Method* m = vfst.method();
 144       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
 145           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
 146           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
 147         break;
 148       }
 149       last_caller = m;
 150       vfst.next();
 151     }
 152     // if this is called from Class.forName0 and that is called from Class.forName,
 153     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 154     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 155     bool found_it = false;
 156     if (!vfst.at_end() &&
 157         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 158         vfst.method()->name() == vmSymbols::forName0_name()) {
 159       vfst.next();
 160       if (!vfst.at_end() &&
 161           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 162           vfst.method()->name() == vmSymbols::forName_name()) {
 163         vfst.next();
 164         found_it = true;
 165       }
 166     } else if (last_caller != NULL &&
 167                last_caller->method_holder()->name() ==
 168                vmSymbols::java_lang_ClassLoader() &&
 169                (last_caller->name() == vmSymbols::loadClassInternal_name() ||
 170                 last_caller->name() == vmSymbols::loadClass_name())) {
 171       found_it = true;
 172     } else if (!vfst.at_end()) {
 173       if (vfst.method()->is_native()) {
 174         // JNI call
 175         found_it = true;
 176       }
 177     }
 178     if (found_it && !vfst.at_end()) {
 179       // found the caller
 180       caller = vfst.method()->method_holder();
 181       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 182       if (line_number == -1) {
 183         // show method name if it's a native method
 184         trace = vfst.method()->name_and_sig_as_C_string();
 185       }
 186       Symbol* s = caller->source_file_name();
 187       if (s != NULL) {
 188         source_file = s->as_C_string();
 189       }
 190     }
 191   }
 192   if (caller != NULL) {
 193     if (to_class != caller) {
 194       const char * from = caller->external_name();
 195       const char * to = to_class->external_name();
 196       // print in a single call to reduce interleaving between threads
 197       if (source_file != NULL) {
 198         log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
 199       } else {
 200         log_debug(class, resolve)("%s %s (%s)", from, to, trace);
 201       }
 202     }
 203   }
 204 }
 205 
 206 void trace_class_resolution(Klass* to_class) {
 207   EXCEPTION_MARK;
 208   trace_class_resolution_impl(to_class, THREAD);
 209   if (HAS_PENDING_EXCEPTION) {
 210     CLEAR_PENDING_EXCEPTION;
 211   }
 212 }
 213 
 214 // Wrapper to trace JVM functions
 215 
 216 #ifdef ASSERT
 217   Histogram* JVMHistogram;
 218   volatile jint JVMHistogram_lock = 0;
 219 
 220   class JVMHistogramElement : public HistogramElement {
 221     public:
 222      JVMHistogramElement(const char* name);
 223   };
 224 
 225   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
 226     _name = elementName;
 227     uintx count = 0;
 228 
 229     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
 230       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
 231         count +=1;
 232         if ( (WarnOnStalledSpinLock > 0)
 233           && (count % WarnOnStalledSpinLock == 0)) {
 234           warning("JVMHistogram_lock seems to be stalled");
 235         }
 236       }
 237      }
 238 
 239     if(JVMHistogram == NULL)
 240       JVMHistogram = new Histogram("JVM Call Counts",100);
 241 
 242     JVMHistogram->add_element(this);
 243     Atomic::dec(&JVMHistogram_lock);
 244   }
 245 
 246   #define JVMCountWrapper(arg) \
 247       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
 248       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
 249 
 250   #define JVMWrapper(arg) JVMCountWrapper(arg);
 251 #else
 252   #define JVMWrapper(arg)
 253 #endif
 254 
 255 
 256 // Interface version /////////////////////////////////////////////////////////////////////
 257 
 258 
 259 JVM_LEAF(jint, JVM_GetInterfaceVersion())
 260   return JVM_INTERFACE_VERSION;
 261 JVM_END
 262 
 263 
 264 // java.lang.System //////////////////////////////////////////////////////////////////////
 265 
 266 
 267 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 268   JVMWrapper("JVM_CurrentTimeMillis");
 269   return os::javaTimeMillis();
 270 JVM_END
 271 
 272 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
 273   JVMWrapper("JVM_NanoTime");
 274   return os::javaTimeNanos();
 275 JVM_END
 276 
 277 // The function below is actually exposed by jdk.internal.misc.VM and not
 278 // java.lang.System, but we choose to keep it here so that it stays next
 279 // to JVM_CurrentTimeMillis and JVM_NanoTime
 280 
 281 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); //  2^32
 282 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
 283 
 284 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
 285   JVMWrapper("JVM_GetNanoTimeAdjustment");
 286   jlong seconds;
 287   jlong nanos;
 288 
 289   os::javaTimeSystemUTC(seconds, nanos);
 290 
 291   // We're going to verify that the result can fit in a long.
 292   // For that we need the difference in seconds between 'seconds'
 293   // and 'offset_secs' to be such that:
 294   //     |seconds - offset_secs| < (2^63/10^9)
 295   // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
 296   // which makes |seconds - offset_secs| < 2^33
 297   // and we will prefer +/- 2^32 as the maximum acceptable diff
 298   // as 2^32 has a more natural feel than 2^33...
 299   //
 300   // So if |seconds - offset_secs| >= 2^32 - we return a special
 301   // sentinel value (-1) which the caller should take as an
 302   // exception value indicating that the offset given to us is
 303   // too far from range of the current time - leading to too big
 304   // a nano adjustment. The caller is expected to recover by
 305   // computing a more accurate offset and calling this method
 306   // again. (For the record 2^32 secs is ~136 years, so that
 307   // should rarely happen)
 308   //
 309   jlong diff = seconds - offset_secs;
 310   if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
 311      return -1; // sentinel value: the offset is too far off the target
 312   }
 313 
 314   // return the adjustment. If you compute a time by adding
 315   // this number of nanoseconds along with the number of seconds
 316   // in the offset you should get the current UTC time.
 317   return (diff * (jlong)1000000000) + nanos;
 318 JVM_END
 319 
 320 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 321                                jobject dst, jint dst_pos, jint length))
 322   JVMWrapper("JVM_ArrayCopy");
 323   // Check if we have null pointers
 324   if (src == NULL || dst == NULL) {
 325     THROW(vmSymbols::java_lang_NullPointerException());
 326   }
 327   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 328   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 329   assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
 330   assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
 331   // Do copy
 332   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 333 JVM_END
 334 
 335 
 336 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 337   JavaValue r(T_OBJECT);
 338   // public synchronized Object put(Object key, Object value);
 339   HandleMark hm(THREAD);
 340   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 341   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
 342   JavaCalls::call_virtual(&r,
 343                           props,
 344                           SystemDictionary::Properties_klass(),
 345                           vmSymbols::put_name(),
 346                           vmSymbols::object_object_object_signature(),
 347                           key_str,
 348                           value_str,
 349                           THREAD);
 350 }
 351 
 352 
 353 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 354 
 355 
 356 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
 357   JVMWrapper("JVM_InitProperties");
 358   ResourceMark rm;
 359 
 360   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
 361 
 362   // System property list includes both user set via -D option and
 363   // jvm system specific properties.
 364   for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
 365     PUTPROP(props, p->key(), p->value());
 366   }
 367 
 368   // Convert the -XX:MaxDirectMemorySize= command line flag
 369   // to the sun.nio.MaxDirectMemorySize property.
 370   // Do this after setting user properties to prevent people
 371   // from setting the value with a -D option, as requested.
 372   {
 373     if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 374       PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
 375     } else {
 376       char as_chars[256];
 377       jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
 378       PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
 379     }
 380   }
 381 
 382   // JVM monitoring and management support
 383   // Add the sun.management.compiler property for the compiler's name
 384   {
 385 #undef CSIZE
 386 #if defined(_LP64) || defined(_WIN64)
 387   #define CSIZE "64-Bit "
 388 #else
 389   #define CSIZE
 390 #endif // 64bit
 391 
 392 #ifdef TIERED
 393     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 394 #else
 395 #if defined(COMPILER1)
 396     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 397 #elif defined(COMPILER2)
 398     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 399 #elif INCLUDE_JVMCI
 400     #error "INCLUDE_JVMCI should imply TIERED"
 401 #else
 402     const char* compiler_name = "";
 403 #endif // compilers
 404 #endif // TIERED
 405 
 406     if (*compiler_name != '\0' &&
 407         (Arguments::mode() != Arguments::_int)) {
 408       PUTPROP(props, "sun.management.compiler", compiler_name);
 409     }
 410   }
 411 
 412   return properties;
 413 JVM_END
 414 
 415 
 416 /*
 417  * Return the temporary directory that the VM uses for the attach
 418  * and perf data files.
 419  *
 420  * It is important that this directory is well-known and the
 421  * same for all VM instances. It cannot be affected by configuration
 422  * variables such as java.io.tmpdir.
 423  */
 424 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
 425   JVMWrapper("JVM_GetTemporaryDirectory");
 426   HandleMark hm(THREAD);
 427   const char* temp_dir = os::get_temp_directory();
 428   Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
 429   return (jstring) JNIHandles::make_local(env, h());
 430 JVM_END
 431 
 432 
 433 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 434 
 435 extern volatile jint vm_created;
 436 
 437 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
 438   before_exit(thread);
 439   vm_exit(code);
 440 JVM_END
 441 
 442 
 443 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
 444   JVMWrapper("JVM_GC");
 445   if (!DisableExplicitGC) {
 446     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 447   }
 448 JVM_END
 449 
 450 
 451 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
 452   JVMWrapper("JVM_MaxObjectInspectionAge");
 453   return Universe::heap()->millis_since_last_gc();
 454 JVM_END
 455 
 456 
 457 static inline jlong convert_size_t_to_jlong(size_t val) {
 458   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 459   NOT_LP64 (return (jlong)val;)
 460   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 461 }
 462 
 463 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
 464   JVMWrapper("JVM_TotalMemory");
 465   size_t n = Universe::heap()->capacity();
 466   return convert_size_t_to_jlong(n);
 467 JVM_END
 468 
 469 
 470 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
 471   JVMWrapper("JVM_FreeMemory");
 472   CollectedHeap* ch = Universe::heap();
 473   size_t n;
 474   {
 475      MutexLocker x(Heap_lock);
 476      n = ch->capacity() - ch->used();
 477   }
 478   return convert_size_t_to_jlong(n);
 479 JVM_END
 480 
 481 
 482 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
 483   JVMWrapper("JVM_MaxMemory");
 484   size_t n = Universe::heap()->max_capacity();
 485   return convert_size_t_to_jlong(n);
 486 JVM_END
 487 
 488 
 489 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
 490   JVMWrapper("JVM_ActiveProcessorCount");
 491   return os::active_processor_count();
 492 JVM_END
 493 
 494 
 495 
 496 // java.lang.Throwable //////////////////////////////////////////////////////
 497 
 498 
 499 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
 500   JVMWrapper("JVM_FillInStackTrace");
 501   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
 502   java_lang_Throwable::fill_in_stack_trace(exception);
 503 JVM_END
 504 
 505 
 506 // java.lang.StackTraceElement //////////////////////////////////////////////
 507 
 508 
 509 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
 510   JVMWrapper("JVM_InitStackTraceElementArray");
 511   Handle exception(THREAD, JNIHandles::resolve(throwable));
 512   objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
 513   objArrayHandle stack_trace(THREAD, st);
 514   // Fill in the allocated stack trace
 515   java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
 516 JVM_END
 517 
 518 
 519 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
 520   JVMWrapper("JVM_InitStackTraceElement");
 521   Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
 522   Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
 523   java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
 524 JVM_END
 525 
 526 
 527 // java.lang.StackWalker //////////////////////////////////////////////////////
 528 
 529 
 530 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
 531                                      jint skip_frames, jint frame_count, jint start_index,
 532                                      jobjectArray frames))
 533   JVMWrapper("JVM_CallStackWalk");
 534   JavaThread* jt = (JavaThread*) THREAD;
 535   if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
 536     THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
 537   }
 538 
 539   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 540 
 541   // frames array is a Class<?>[] array when only getting caller reference,
 542   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 543   // be null.
 544   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 545   objArrayHandle frames_array_h(THREAD, fa);
 546 
 547   int limit = start_index + frame_count;
 548   if (frames_array_h->length() < limit) {
 549     THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
 550   }
 551 
 552   oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
 553                                start_index, frames_array_h, CHECK_NULL);
 554   return JNIHandles::make_local(env, result);
 555 JVM_END
 556 
 557 
 558 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
 559                                   jint frame_count, jint start_index,
 560                                   jobjectArray frames))
 561   JVMWrapper("JVM_MoreStackWalk");
 562   JavaThread* jt = (JavaThread*) THREAD;
 563 
 564   // frames array is a Class<?>[] array when only getting caller reference,
 565   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 566   // be null.
 567   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 568   objArrayHandle frames_array_h(THREAD, fa);
 569 
 570   int limit = start_index+frame_count;
 571   if (frames_array_h->length() < limit) {
 572     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
 573   }
 574 
 575   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 576   return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
 577                                    start_index, frames_array_h, THREAD);
 578 JVM_END
 579 
 580 // java.lang.Object ///////////////////////////////////////////////
 581 
 582 
 583 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 584   JVMWrapper("JVM_IHashCode");
 585   // as implemented in the classic virtual machine; return 0 if object is NULL
 586   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 587 JVM_END
 588 
 589 
 590 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 591   JVMWrapper("JVM_MonitorWait");
 592   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 593   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 594   if (JvmtiExport::should_post_monitor_wait()) {
 595     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 596 
 597     // The current thread already owns the monitor and it has not yet
 598     // been added to the wait queue so the current thread cannot be
 599     // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
 600     // event handler cannot accidentally consume an unpark() meant for
 601     // the ParkEvent associated with this ObjectMonitor.
 602   }
 603   ObjectSynchronizer::wait(obj, ms, CHECK);
 604 JVM_END
 605 
 606 
 607 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 608   JVMWrapper("JVM_MonitorNotify");
 609   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 610   ObjectSynchronizer::notify(obj, CHECK);
 611 JVM_END
 612 
 613 
 614 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 615   JVMWrapper("JVM_MonitorNotifyAll");
 616   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 617   ObjectSynchronizer::notifyall(obj, CHECK);
 618 JVM_END
 619 
 620 
 621 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 622   JVMWrapper("JVM_Clone");
 623   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 624   Klass* klass = obj->klass();
 625   JvmtiVMObjectAllocEventCollector oam;
 626 
 627 #ifdef ASSERT
 628   // Just checking that the cloneable flag is set correct
 629   if (obj->is_array()) {
 630     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 631   } else {
 632     guarantee(obj->is_instance(), "should be instanceOop");
 633     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 634     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 635   }
 636 #endif
 637 
 638   // Check if class of obj supports the Cloneable interface.
 639   // All arrays are considered to be cloneable (See JLS 20.1.5)
 640   if (!klass->is_cloneable()) {
 641     ResourceMark rm(THREAD);
 642     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 643   }
 644 
 645   // Make shallow object copy
 646   const int size = obj->size();
 647   oop new_obj_oop = NULL;
 648   if (obj->is_array()) {
 649     const int length = ((arrayOop)obj())->length();
 650     new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
 651   } else {
 652     new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
 653   }
 654 
 655   // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
 656   // is modifying a reference field in the clonee, a non-oop-atomic copy might
 657   // be suspended in the middle of copying the pointer and end up with parts
 658   // of two different pointers in the field.  Subsequent dereferences will crash.
 659   // 4846409: an oop-copy of objects with long or double fields or arrays of same
 660   // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
 661   // of oops.  We know objects are aligned on a minimum of an jlong boundary.
 662   // The same is true of StubRoutines::object_copy and the various oop_copy
 663   // variants, and of the code generated by the inline_native_clone intrinsic.
 664   assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
 665   Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
 666                                (size_t)align_object_size(size) / HeapWordsPerLong);
 667   // Clear the header
 668   new_obj_oop->init_mark();
 669 
 670   // Store check (mark entire object and let gc sort it out)
 671   BarrierSet* bs = Universe::heap()->barrier_set();
 672   assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
 673   bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
 674 
 675   Handle new_obj(THREAD, new_obj_oop);
 676   // Caution: this involves a java upcall, so the clone should be
 677   // "gc-robust" by this stage.
 678   if (klass->has_finalizer()) {
 679     assert(obj->is_instance(), "should be instanceOop");
 680     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
 681     new_obj = Handle(THREAD, new_obj_oop);
 682   }
 683 
 684   return JNIHandles::make_local(env, new_obj());
 685 JVM_END
 686 
 687 // java.io.File ///////////////////////////////////////////////////////////////
 688 
 689 JVM_LEAF(char*, JVM_NativePath(char* path))
 690   JVMWrapper("JVM_NativePath");
 691   return os::native_path(path);
 692 JVM_END
 693 
 694 
 695 // Misc. class handling ///////////////////////////////////////////////////////////
 696 
 697 
 698 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
 699   JVMWrapper("JVM_GetCallerClass");
 700 
 701   // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
 702   // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
 703   // temporarily for existing code to use until a replacement API is defined.
 704   if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
 705     Klass* k = thread->security_get_caller_class(depth);
 706     return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
 707   }
 708 
 709   // Getting the class of the caller frame.
 710   //
 711   // The call stack at this point looks something like this:
 712   //
 713   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 714   // [1] [ @CallerSensitive API.method                                   ]
 715   // [.] [ (skipped intermediate frames)                                 ]
 716   // [n] [ caller                                                        ]
 717   vframeStream vfst(thread);
 718   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 719   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 720     Method* m = vfst.method();
 721     assert(m != NULL, "sanity");
 722     switch (n) {
 723     case 0:
 724       // This must only be called from Reflection.getCallerClass
 725       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 726         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 727       }
 728       // fall-through
 729     case 1:
 730       // Frame 0 and 1 must be caller sensitive.
 731       if (!m->caller_sensitive()) {
 732         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 733       }
 734       break;
 735     default:
 736       if (!m->is_ignored_by_security_stack_walk()) {
 737         // We have reached the desired frame; return the holder class.
 738         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 739       }
 740       break;
 741     }
 742   }
 743   return NULL;
 744 JVM_END
 745 
 746 
 747 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 748   JVMWrapper("JVM_FindPrimitiveClass");
 749   oop mirror = NULL;
 750   BasicType t = name2type(utf);
 751   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
 752     mirror = Universe::java_mirror(t);
 753   }
 754   if (mirror == NULL) {
 755     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 756   } else {
 757     return (jclass) JNIHandles::make_local(env, mirror);
 758   }
 759 JVM_END
 760 
 761 
 762 // Returns a class loaded by the bootstrap class loader; or null
 763 // if not found.  ClassNotFoundException is not thrown.
 764 // FindClassFromBootLoader is exported to the launcher for windows.
 765 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 766                                               const char* name))
 767   JVMWrapper("JVM_FindClassFromBootLoader");
 768 
 769   // Java libraries should ensure that name is never null...
 770   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 771     // It's impossible to create this class;  the name cannot fit
 772     // into the constant pool.
 773     return NULL;
 774   }
 775 
 776   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 777   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 778   if (k == NULL) {
 779     return NULL;
 780   }
 781 
 782   if (log_is_enabled(Debug, class, resolve)) {
 783     trace_class_resolution(k);
 784   }
 785   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 786 JVM_END
 787 
 788 // Find a class with this name in this loader, using the caller's protection domain.
 789 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
 790                                           jboolean init, jobject loader,
 791                                           jclass caller))
 792   JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
 793   // Java libraries should ensure that name is never null...
 794   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 795     // It's impossible to create this class;  the name cannot fit
 796     // into the constant pool.
 797     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 798   }
 799 
 800   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 801 
 802   oop loader_oop = JNIHandles::resolve(loader);
 803   oop from_class = JNIHandles::resolve(caller);
 804   oop protection_domain = NULL;
 805   // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
 806   // NPE. Put it in another way, the bootstrap class loader has all permission and
 807   // thus no checkPackageAccess equivalence in the VM class loader.
 808   // The caller is also passed as NULL by the java code if there is no security
 809   // manager to avoid the performance cost of getting the calling class.
 810   if (from_class != NULL && loader_oop != NULL) {
 811     protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
 812   }
 813 
 814   Handle h_loader(THREAD, loader_oop);
 815   Handle h_prot(THREAD, protection_domain);
 816   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 817                                                h_prot, false, THREAD);
 818 
 819   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 820     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 821   }
 822   return result;
 823 JVM_END
 824 
 825 // Currently only called from the old verifier.
 826 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 827                                          jboolean init, jclass from))
 828   JVMWrapper("JVM_FindClassFromClass");
 829   if (name == NULL) {
 830     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 831   }
 832   if ((int)strlen(name) > Symbol::max_length()) {
 833     // It's impossible to create this class;  the name cannot fit
 834     // into the constant pool.
 835     Exceptions::fthrow(THREAD_AND_LOCATION,
 836                        vmSymbols::java_lang_NoClassDefFoundError(),
 837                        "Class name exceeds maximum length of %d: %s",
 838                        Symbol::max_length(),
 839                        name);
 840     return 0;
 841   }
 842   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 843   oop from_class_oop = JNIHandles::resolve(from);
 844   Klass* from_class = (from_class_oop == NULL)
 845                            ? (Klass*)NULL
 846                            : java_lang_Class::as_Klass(from_class_oop);
 847   oop class_loader = NULL;
 848   oop protection_domain = NULL;
 849   if (from_class != NULL) {
 850     class_loader = from_class->class_loader();
 851     protection_domain = from_class->protection_domain();
 852   }
 853   Handle h_loader(THREAD, class_loader);
 854   Handle h_prot  (THREAD, protection_domain);
 855   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 856                                                h_prot, true, thread);
 857 
 858   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 859     // this function is generally only used for class loading during verification.
 860     ResourceMark rm;
 861     oop from_mirror = JNIHandles::resolve_non_null(from);
 862     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 863     const char * from_name = from_class->external_name();
 864 
 865     oop mirror = JNIHandles::resolve_non_null(result);
 866     Klass* to_class = java_lang_Class::as_Klass(mirror);
 867     const char * to = to_class->external_name();
 868     log_debug(class, resolve)("%s %s (verification)", from_name, to);
 869   }
 870 
 871   return result;
 872 JVM_END
 873 
 874 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 875   if (loader.is_null()) {
 876     return;
 877   }
 878 
 879   // check whether the current caller thread holds the lock or not.
 880   // If not, increment the corresponding counter
 881   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 882       ObjectSynchronizer::owner_self) {
 883     counter->inc();
 884   }
 885 }
 886 
 887 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 888 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 889                                       jobject loader, const jbyte *buf,
 890                                       jsize len, jobject pd, const char *source,
 891                                       TRAPS) {
 892   if (source == NULL)  source = "__JVM_DefineClass__";
 893 
 894   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 895   JavaThread* jt = (JavaThread*) THREAD;
 896 
 897   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 898                              ClassLoader::perf_define_appclass_selftime(),
 899                              ClassLoader::perf_define_appclasses(),
 900                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 901                              jt->get_thread_stat()->perf_timers_addr(),
 902                              PerfClassTraceTime::DEFINE_CLASS);
 903 
 904   if (UsePerfData) {
 905     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 906   }
 907 
 908   // Since exceptions can be thrown, class initialization can take place
 909   // if name is NULL no check for class name in .class stream has to be made.
 910   TempNewSymbol class_name = NULL;
 911   if (name != NULL) {
 912     const int str_len = (int)strlen(name);
 913     if (str_len > Symbol::max_length()) {
 914       // It's impossible to create this class;  the name cannot fit
 915       // into the constant pool.
 916       Exceptions::fthrow(THREAD_AND_LOCATION,
 917                          vmSymbols::java_lang_NoClassDefFoundError(),
 918                          "Class name exceeds maximum length of %d: %s",
 919                          Symbol::max_length(),
 920                          name);
 921       return 0;
 922     }
 923     class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
 924   }
 925 
 926   ResourceMark rm(THREAD);
 927   ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
 928   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 929   if (UsePerfData) {
 930     is_lock_held_by_thread(class_loader,
 931                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
 932                            THREAD);
 933   }
 934   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 935   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 936                                                    class_loader,
 937                                                    protection_domain,
 938                                                    &st,
 939                                                    CHECK_NULL);
 940 
 941   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 942     trace_class_resolution(k);
 943   }
 944 
 945   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 946 }
 947 
 948 
 949 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
 950   JVMWrapper("JVM_DefineClass");
 951 
 952   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
 953 JVM_END
 954 
 955 
 956 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
 957   JVMWrapper("JVM_DefineClassWithSource");
 958 
 959   return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
 960 JVM_END
 961 
 962 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
 963   JVMWrapper("JVM_FindLoadedClass");
 964   ResourceMark rm(THREAD);
 965 
 966   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
 967   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
 968 
 969   const char* str   = java_lang_String::as_utf8_string(string());
 970   // Sanity check, don't expect null
 971   if (str == NULL) return NULL;
 972 
 973   const int str_len = (int)strlen(str);
 974   if (str_len > Symbol::max_length()) {
 975     // It's impossible to create this class;  the name cannot fit
 976     // into the constant pool.
 977     return NULL;
 978   }
 979   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
 980 
 981   // Security Note:
 982   //   The Java level wrapper will perform the necessary security check allowing
 983   //   us to pass the NULL as the initiating class loader.
 984   Handle h_loader(THREAD, JNIHandles::resolve(loader));
 985   if (UsePerfData) {
 986     is_lock_held_by_thread(h_loader,
 987                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
 988                            THREAD);
 989   }
 990 
 991   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
 992                                                               h_loader,
 993                                                               Handle(),
 994                                                               CHECK_NULL);
 995 #if INCLUDE_CDS
 996   if (k == NULL) {
 997     // If the class is not already loaded, try to see if it's in the shared
 998     // archive for the current classloader (h_loader).
 999     k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1000   }
1001 #endif
1002   return (k == NULL) ? NULL :
1003             (jclass) JNIHandles::make_local(env, k->java_mirror());
1004 JVM_END
1005 
1006 // Module support //////////////////////////////////////////////////////////////////////////////
1007 
1008 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1009                                  jstring location, const char* const* packages, jsize num_packages))
1010   JVMWrapper("JVM_DefineModule");
1011   Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1012 JVM_END
1013 
1014 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1015   JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1016   Modules::set_bootloader_unnamed_module(module, CHECK);
1017 JVM_END
1018 
1019 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1020   JVMWrapper("JVM_AddModuleExports");
1021   Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1022 JVM_END
1023 
1024 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1025   JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1026   Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1027 JVM_END
1028 
1029 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1030   JVMWrapper("JVM_AddModuleExportsToAll");
1031   Modules::add_module_exports(from_module, package, NULL, CHECK);
1032 JVM_END
1033 
1034 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1035   JVMWrapper("JVM_AddReadsModule");
1036   Modules::add_reads_module(from_module, source_module, CHECK);
1037 JVM_END
1038 
1039 JVM_ENTRY (void, JVM_AddModulePackage(JNIEnv *env, jobject module, const char* package))
1040   JVMWrapper("JVM_AddModulePackage");
1041   Modules::add_module_package(module, package, CHECK);
1042 JVM_END
1043 
1044 // Reflection support //////////////////////////////////////////////////////////////////////////////
1045 
1046 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1047   assert (cls != NULL, "illegal class");
1048   JVMWrapper("JVM_GetClassName");
1049   JvmtiVMObjectAllocEventCollector oam;
1050   ResourceMark rm(THREAD);
1051   const char* name;
1052   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1053     name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1054   } else {
1055     // Consider caching interned string in Klass
1056     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1057     assert(k->is_klass(), "just checking");
1058     name = k->external_name();
1059   }
1060   oop result = StringTable::intern((char*) name, CHECK_NULL);
1061   return (jstring) JNIHandles::make_local(env, result);
1062 JVM_END
1063 
1064 
1065 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1066   JVMWrapper("JVM_GetClassInterfaces");
1067   JvmtiVMObjectAllocEventCollector oam;
1068   oop mirror = JNIHandles::resolve_non_null(cls);
1069 
1070   // Special handling for primitive objects
1071   if (java_lang_Class::is_primitive(mirror)) {
1072     // Primitive objects does not have any interfaces
1073     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1074     return (jobjectArray) JNIHandles::make_local(env, r);
1075   }
1076 
1077   Klass* klass = java_lang_Class::as_Klass(mirror);
1078   // Figure size of result array
1079   int size;
1080   if (klass->is_instance_klass()) {
1081     size = InstanceKlass::cast(klass)->local_interfaces()->length();
1082   } else {
1083     assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1084     size = 2;
1085   }
1086 
1087   // Allocate result array
1088   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1089   objArrayHandle result (THREAD, r);
1090   // Fill in result
1091   if (klass->is_instance_klass()) {
1092     // Regular instance klass, fill in all local interfaces
1093     for (int index = 0; index < size; index++) {
1094       Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1095       result->obj_at_put(index, k->java_mirror());
1096     }
1097   } else {
1098     // All arrays implement java.lang.Cloneable and java.io.Serializable
1099     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1100     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1101   }
1102   return (jobjectArray) JNIHandles::make_local(env, result());
1103 JVM_END
1104 
1105 
1106 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1107   JVMWrapper("JVM_IsInterface");
1108   oop mirror = JNIHandles::resolve_non_null(cls);
1109   if (java_lang_Class::is_primitive(mirror)) {
1110     return JNI_FALSE;
1111   }
1112   Klass* k = java_lang_Class::as_Klass(mirror);
1113   jboolean result = k->is_interface();
1114   assert(!result || k->is_instance_klass(),
1115          "all interfaces are instance types");
1116   // The compiler intrinsic for isInterface tests the
1117   // Klass::_access_flags bits in the same way.
1118   return result;
1119 JVM_END
1120 
1121 
1122 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1123   JVMWrapper("JVM_GetClassSigners");
1124   JvmtiVMObjectAllocEventCollector oam;
1125   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1126     // There are no signers for primitive types
1127     return NULL;
1128   }
1129 
1130   objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1131 
1132   // If there are no signers set in the class, or if the class
1133   // is an array, return NULL.
1134   if (signers == NULL) return NULL;
1135 
1136   // copy of the signers array
1137   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1138   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1139   for (int index = 0; index < signers->length(); index++) {
1140     signers_copy->obj_at_put(index, signers->obj_at(index));
1141   }
1142 
1143   // return the copy
1144   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1145 JVM_END
1146 
1147 
1148 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1149   JVMWrapper("JVM_SetClassSigners");
1150   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1151     // This call is ignored for primitive types and arrays.
1152     // Signers are only set once, ClassLoader.java, and thus shouldn't
1153     // be called with an array.  Only the bootstrap loader creates arrays.
1154     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1155     if (k->is_instance_klass()) {
1156       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1157     }
1158   }
1159 JVM_END
1160 
1161 
1162 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1163   JVMWrapper("JVM_GetProtectionDomain");
1164   if (JNIHandles::resolve(cls) == NULL) {
1165     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1166   }
1167 
1168   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1169     // Primitive types does not have a protection domain.
1170     return NULL;
1171   }
1172 
1173   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1174   return (jobject) JNIHandles::make_local(env, pd);
1175 JVM_END
1176 
1177 
1178 static bool is_authorized(Handle context, InstanceKlass* klass, TRAPS) {
1179   // If there is a security manager and protection domain, check the access
1180   // in the protection domain, otherwise it is authorized.
1181   if (java_lang_System::has_security_manager()) {
1182 
1183     // For bootstrapping, if pd implies method isn't in the JDK, allow
1184     // this context to revert to older behavior.
1185     // In this case the isAuthorized field in AccessControlContext is also not
1186     // present.
1187     if (Universe::protection_domain_implies_method() == NULL) {
1188       return true;
1189     }
1190 
1191     // Whitelist certain access control contexts
1192     if (java_security_AccessControlContext::is_authorized(context)) {
1193       return true;
1194     }
1195 
1196     oop prot = klass->protection_domain();
1197     if (prot != NULL) {
1198       // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1199       // in the new wrapper.
1200       methodHandle m(THREAD, Universe::protection_domain_implies_method());
1201       Handle h_prot(THREAD, prot);
1202       JavaValue result(T_BOOLEAN);
1203       JavaCallArguments args(h_prot);
1204       JavaCalls::call(&result, m, &args, CHECK_false);
1205       return (result.get_jboolean() != 0);
1206     }
1207   }
1208   return true;
1209 }
1210 
1211 // Create an AccessControlContext with a protection domain with null codesource
1212 // and null permissions - which gives no permissions.
1213 oop create_dummy_access_control_context(TRAPS) {
1214   InstanceKlass* pd_klass = SystemDictionary::ProtectionDomain_klass();
1215   Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1216   // Call constructor ProtectionDomain(null, null);
1217   JavaValue result(T_VOID);
1218   JavaCalls::call_special(&result, obj, pd_klass,
1219                           vmSymbols::object_initializer_name(),
1220                           vmSymbols::codesource_permissioncollection_signature(),
1221                           Handle(), Handle(), CHECK_NULL);
1222 
1223   // new ProtectionDomain[] {pd};
1224   objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1225   context->obj_at_put(0, obj());
1226 
1227   // new AccessControlContext(new ProtectionDomain[] {pd})
1228   objArrayHandle h_context(THREAD, context);
1229   oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1230   return acc;
1231 }
1232 
1233 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1234   JVMWrapper("JVM_DoPrivileged");
1235 
1236   if (action == NULL) {
1237     THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1238   }
1239 
1240   // Compute the frame initiating the do privileged operation and setup the privileged stack
1241   vframeStream vfst(thread);
1242   vfst.security_get_caller_frame(1);
1243 
1244   if (vfst.at_end()) {
1245     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1246   }
1247 
1248   Method* method        = vfst.method();
1249   InstanceKlass* klass  = method->method_holder();
1250 
1251   // Check that action object understands "Object run()"
1252   Handle h_context;
1253   if (context != NULL) {
1254     h_context = Handle(THREAD, JNIHandles::resolve(context));
1255     bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1256     if (!authorized) {
1257       // Create an unprivileged access control object and call it's run function
1258       // instead.
1259       oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1260       h_context = Handle(THREAD, noprivs);
1261     }
1262   }
1263 
1264   // Check that action object understands "Object run()"
1265   Handle object (THREAD, JNIHandles::resolve(action));
1266 
1267   // get run() method
1268   Method* m_oop = object->klass()->uncached_lookup_method(
1269                                            vmSymbols::run_method_name(),
1270                                            vmSymbols::void_object_signature(),
1271                                            Klass::find_overpass);
1272   methodHandle m (THREAD, m_oop);
1273   if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1274     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1275   }
1276 
1277   // Stack allocated list of privileged stack elements
1278   PrivilegedElement pi;
1279   if (!vfst.at_end()) {
1280     pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1281     thread->set_privileged_stack_top(&pi);
1282   }
1283 
1284 
1285   // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1286   // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1287   Handle pending_exception;
1288   JavaValue result(T_OBJECT);
1289   JavaCallArguments args(object);
1290   JavaCalls::call(&result, m, &args, THREAD);
1291 
1292   // done with action, remove ourselves from the list
1293   if (!vfst.at_end()) {
1294     assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1295     thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1296   }
1297 
1298   if (HAS_PENDING_EXCEPTION) {
1299     pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1300     CLEAR_PENDING_EXCEPTION;
1301     // JVMTI has already reported the pending exception
1302     // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1303     if (THREAD->is_Java_thread()) {
1304       JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1305     }
1306     if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1307         !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1308       // Throw a java.security.PrivilegedActionException(Exception e) exception
1309       JavaCallArguments args(pending_exception);
1310       THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1311                   vmSymbols::exception_void_signature(),
1312                   &args);
1313     }
1314   }
1315 
1316   if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1317   return JNIHandles::make_local(env, (oop) result.get_jobject());
1318 JVM_END
1319 
1320 
1321 // Returns the inherited_access_control_context field of the running thread.
1322 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1323   JVMWrapper("JVM_GetInheritedAccessControlContext");
1324   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1325   return JNIHandles::make_local(env, result);
1326 JVM_END
1327 
1328 class RegisterArrayForGC {
1329  private:
1330   JavaThread *_thread;
1331  public:
1332   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1333     _thread = thread;
1334     _thread->register_array_for_gc(array);
1335   }
1336 
1337   ~RegisterArrayForGC() {
1338     _thread->register_array_for_gc(NULL);
1339   }
1340 };
1341 
1342 
1343 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1344   JVMWrapper("JVM_GetStackAccessControlContext");
1345   if (!UsePrivilegedStack) return NULL;
1346 
1347   ResourceMark rm(THREAD);
1348   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1349   JvmtiVMObjectAllocEventCollector oam;
1350 
1351   // count the protection domains on the execution stack. We collapse
1352   // duplicate consecutive protection domains into a single one, as
1353   // well as stopping when we hit a privileged frame.
1354 
1355   // Use vframeStream to iterate through Java frames
1356   vframeStream vfst(thread);
1357 
1358   oop previous_protection_domain = NULL;
1359   Handle privileged_context(thread, NULL);
1360   bool is_privileged = false;
1361   oop protection_domain = NULL;
1362 
1363   for(; !vfst.at_end(); vfst.next()) {
1364     // get method of frame
1365     Method* method = vfst.method();
1366     intptr_t* frame_id   = vfst.frame_id();
1367 
1368     // check the privileged frames to see if we have a match
1369     if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1370       // this frame is privileged
1371       is_privileged = true;
1372       privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1373       protection_domain  = thread->privileged_stack_top()->protection_domain();
1374     } else {
1375       protection_domain = method->method_holder()->protection_domain();
1376     }
1377 
1378     if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1379       local_array->push(protection_domain);
1380       previous_protection_domain = protection_domain;
1381     }
1382 
1383     if (is_privileged) break;
1384   }
1385 
1386 
1387   // either all the domains on the stack were system domains, or
1388   // we had a privileged system domain
1389   if (local_array->is_empty()) {
1390     if (is_privileged && privileged_context.is_null()) return NULL;
1391 
1392     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1393     return JNIHandles::make_local(env, result);
1394   }
1395 
1396   // the resource area must be registered in case of a gc
1397   RegisterArrayForGC ragc(thread, local_array);
1398   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1399                                                  local_array->length(), CHECK_NULL);
1400   objArrayHandle h_context(thread, context);
1401   for (int index = 0; index < local_array->length(); index++) {
1402     h_context->obj_at_put(index, local_array->at(index));
1403   }
1404 
1405   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1406 
1407   return JNIHandles::make_local(env, result);
1408 JVM_END
1409 
1410 
1411 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1412   JVMWrapper("JVM_IsArrayClass");
1413   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1414   return (k != NULL) && k->is_array_klass() ? true : false;
1415 JVM_END
1416 
1417 
1418 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1419   JVMWrapper("JVM_IsPrimitiveClass");
1420   oop mirror = JNIHandles::resolve_non_null(cls);
1421   return (jboolean) java_lang_Class::is_primitive(mirror);
1422 JVM_END
1423 
1424 
1425 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1426   JVMWrapper("JVM_GetClassModifiers");
1427   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1428     // Primitive type
1429     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1430   }
1431 
1432   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1433   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1434   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1435   return k->modifier_flags();
1436 JVM_END
1437 
1438 
1439 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1440 
1441 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1442   JvmtiVMObjectAllocEventCollector oam;
1443   // ofClass is a reference to a java_lang_Class object. The mirror object
1444   // of an InstanceKlass
1445 
1446   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1447       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1448     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1449     return (jobjectArray)JNIHandles::make_local(env, result);
1450   }
1451 
1452   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1453   InnerClassesIterator iter(k);
1454 
1455   if (iter.length() == 0) {
1456     // Neither an inner nor outer class
1457     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1458     return (jobjectArray)JNIHandles::make_local(env, result);
1459   }
1460 
1461   // find inner class info
1462   constantPoolHandle cp(thread, k->constants());
1463   int length = iter.length();
1464 
1465   // Allocate temp. result array
1466   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1467   objArrayHandle result (THREAD, r);
1468   int members = 0;
1469 
1470   for (; !iter.done(); iter.next()) {
1471     int ioff = iter.inner_class_info_index();
1472     int ooff = iter.outer_class_info_index();
1473 
1474     if (ioff != 0 && ooff != 0) {
1475       // Check to see if the name matches the class we're looking for
1476       // before attempting to find the class.
1477       if (cp->klass_name_at_matches(k, ooff)) {
1478         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1479         if (outer_klass == k) {
1480            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1481            InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1482 
1483            // Throws an exception if outer klass has not declared k as
1484            // an inner klass
1485            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1486 
1487            result->obj_at_put(members, inner_klass->java_mirror());
1488            members++;
1489         }
1490       }
1491     }
1492   }
1493 
1494   if (members != length) {
1495     // Return array of right length
1496     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1497     for(int i = 0; i < members; i++) {
1498       res->obj_at_put(i, result->obj_at(i));
1499     }
1500     return (jobjectArray)JNIHandles::make_local(env, res);
1501   }
1502 
1503   return (jobjectArray)JNIHandles::make_local(env, result());
1504 JVM_END
1505 
1506 
1507 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1508 {
1509   // ofClass is a reference to a java_lang_Class object.
1510   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1511       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1512     return NULL;
1513   }
1514 
1515   bool inner_is_member = false;
1516   Klass* outer_klass
1517     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1518                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1519   if (outer_klass == NULL)  return NULL;  // already a top-level class
1520   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1521   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1522 }
1523 JVM_END
1524 
1525 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1526 {
1527   oop mirror = JNIHandles::resolve_non_null(cls);
1528   if (java_lang_Class::is_primitive(mirror) ||
1529       !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1530     return NULL;
1531   }
1532   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1533   int ooff = 0, noff = 0;
1534   if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1535     if (noff != 0) {
1536       constantPoolHandle i_cp(thread, k->constants());
1537       Symbol* name = i_cp->symbol_at(noff);
1538       Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1539       return (jstring) JNIHandles::make_local(env, str());
1540     }
1541   }
1542   return NULL;
1543 }
1544 JVM_END
1545 
1546 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1547   assert (cls != NULL, "illegal class");
1548   JVMWrapper("JVM_GetClassSignature");
1549   JvmtiVMObjectAllocEventCollector oam;
1550   ResourceMark rm(THREAD);
1551   // Return null for arrays and primatives
1552   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1553     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1554     if (k->is_instance_klass()) {
1555       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1556       if (sym == NULL) return NULL;
1557       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1558       return (jstring) JNIHandles::make_local(env, str());
1559     }
1560   }
1561   return NULL;
1562 JVM_END
1563 
1564 
1565 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1566   assert (cls != NULL, "illegal class");
1567   JVMWrapper("JVM_GetClassAnnotations");
1568 
1569   // Return null for arrays and primitives
1570   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1571     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1572     if (k->is_instance_klass()) {
1573       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1574       return (jbyteArray) JNIHandles::make_local(env, a);
1575     }
1576   }
1577   return NULL;
1578 JVM_END
1579 
1580 
1581 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1582   // some of this code was adapted from from jni_FromReflectedField
1583 
1584   oop reflected = JNIHandles::resolve_non_null(field);
1585   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1586   Klass* k    = java_lang_Class::as_Klass(mirror);
1587   int slot      = java_lang_reflect_Field::slot(reflected);
1588   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1589 
1590   InstanceKlass* ik = InstanceKlass::cast(k);
1591   intptr_t offset = ik->field_offset(slot);
1592 
1593   if (modifiers & JVM_ACC_STATIC) {
1594     // for static fields we only look in the current class
1595     if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1596       assert(false, "cannot find static field");
1597       return false;
1598     }
1599   } else {
1600     // for instance fields we start with the current class and work
1601     // our way up through the superclass chain
1602     if (!ik->find_field_from_offset(offset, false, &fd)) {
1603       assert(false, "cannot find instance field");
1604       return false;
1605     }
1606   }
1607   return true;
1608 }
1609 
1610 static Method* jvm_get_method_common(jobject method) {
1611   // some of this code was adapted from from jni_FromReflectedMethod
1612 
1613   oop reflected = JNIHandles::resolve_non_null(method);
1614   oop mirror    = NULL;
1615   int slot      = 0;
1616 
1617   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1618     mirror = java_lang_reflect_Constructor::clazz(reflected);
1619     slot   = java_lang_reflect_Constructor::slot(reflected);
1620   } else {
1621     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1622            "wrong type");
1623     mirror = java_lang_reflect_Method::clazz(reflected);
1624     slot   = java_lang_reflect_Method::slot(reflected);
1625   }
1626   Klass* k = java_lang_Class::as_Klass(mirror);
1627 
1628   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1629   assert(m != NULL, "cannot find method");
1630   return m;  // caller has to deal with NULL in product mode
1631 }
1632 
1633 /* Type use annotations support (JDK 1.8) */
1634 
1635 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1636   assert (cls != NULL, "illegal class");
1637   JVMWrapper("JVM_GetClassTypeAnnotations");
1638   ResourceMark rm(THREAD);
1639   // Return null for arrays and primitives
1640   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1641     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1642     if (k->is_instance_klass()) {
1643       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1644       if (type_annotations != NULL) {
1645         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1646         return (jbyteArray) JNIHandles::make_local(env, a);
1647       }
1648     }
1649   }
1650   return NULL;
1651 JVM_END
1652 
1653 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1654   assert (method != NULL, "illegal method");
1655   JVMWrapper("JVM_GetMethodTypeAnnotations");
1656 
1657   // method is a handle to a java.lang.reflect.Method object
1658   Method* m = jvm_get_method_common(method);
1659   if (m == NULL) {
1660     return NULL;
1661   }
1662 
1663   AnnotationArray* type_annotations = m->type_annotations();
1664   if (type_annotations != NULL) {
1665     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1666     return (jbyteArray) JNIHandles::make_local(env, a);
1667   }
1668 
1669   return NULL;
1670 JVM_END
1671 
1672 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1673   assert (field != NULL, "illegal field");
1674   JVMWrapper("JVM_GetFieldTypeAnnotations");
1675 
1676   fieldDescriptor fd;
1677   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1678   if (!gotFd) {
1679     return NULL;
1680   }
1681 
1682   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1683 JVM_END
1684 
1685 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1686   if (!cp->is_within_bounds(index)) {
1687     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1688   }
1689 }
1690 
1691 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1692 {
1693   JVMWrapper("JVM_GetMethodParameters");
1694   // method is a handle to a java.lang.reflect.Method object
1695   Method* method_ptr = jvm_get_method_common(method);
1696   methodHandle mh (THREAD, method_ptr);
1697   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1698   const int num_params = mh->method_parameters_length();
1699 
1700   if (num_params < 0) {
1701     // A -1 return value from method_parameters_length means there is no
1702     // parameter data.  Return null to indicate this to the reflection
1703     // API.
1704     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1705     return (jobjectArray)NULL;
1706   } else {
1707     // Otherwise, we return something up to reflection, even if it is
1708     // a zero-length array.  Why?  Because in some cases this can
1709     // trigger a MalformedParametersException.
1710 
1711     // make sure all the symbols are properly formatted
1712     for (int i = 0; i < num_params; i++) {
1713       MethodParametersElement* params = mh->method_parameters_start();
1714       int index = params[i].name_cp_index;
1715       bounds_check(mh->constants(), index, CHECK_NULL);
1716 
1717       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1718         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1719                     "Wrong type at constant pool index");
1720       }
1721 
1722     }
1723 
1724     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1725     objArrayHandle result (THREAD, result_oop);
1726 
1727     for (int i = 0; i < num_params; i++) {
1728       MethodParametersElement* params = mh->method_parameters_start();
1729       // For a 0 index, give a NULL symbol
1730       Symbol* sym = 0 != params[i].name_cp_index ?
1731         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1732       int flags = params[i].flags;
1733       oop param = Reflection::new_parameter(reflected_method, i, sym,
1734                                             flags, CHECK_NULL);
1735       result->obj_at_put(i, param);
1736     }
1737     return (jobjectArray)JNIHandles::make_local(env, result());
1738   }
1739 }
1740 JVM_END
1741 
1742 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1743 
1744 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1745 {
1746   JVMWrapper("JVM_GetClassDeclaredFields");
1747   JvmtiVMObjectAllocEventCollector oam;
1748 
1749   // Exclude primitive types and array types
1750   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1751       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1752     // Return empty array
1753     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1754     return (jobjectArray) JNIHandles::make_local(env, res);
1755   }
1756 
1757   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1758   constantPoolHandle cp(THREAD, k->constants());
1759 
1760   // Ensure class is linked
1761   k->link_class(CHECK_NULL);
1762 
1763   // Allocate result
1764   int num_fields;
1765 
1766   if (publicOnly) {
1767     num_fields = 0;
1768     for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1769       if (fs.access_flags().is_public()) ++num_fields;
1770     }
1771   } else {
1772     num_fields = k->java_fields_count();
1773   }
1774 
1775   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1776   objArrayHandle result (THREAD, r);
1777 
1778   int out_idx = 0;
1779   fieldDescriptor fd;
1780   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1781     if (!publicOnly || fs.access_flags().is_public()) {
1782       fd.reinitialize(k, fs.index());
1783       oop field = Reflection::new_field(&fd, CHECK_NULL);
1784       result->obj_at_put(out_idx, field);
1785       ++out_idx;
1786     }
1787   }
1788   assert(out_idx == num_fields, "just checking");
1789   return (jobjectArray) JNIHandles::make_local(env, result());
1790 }
1791 JVM_END
1792 
1793 static bool select_method(methodHandle method, bool want_constructor) {
1794   if (want_constructor) {
1795     return (method->is_initializer() && !method->is_static());
1796   } else {
1797     return  (!method->is_initializer() && !method->is_overpass());
1798   }
1799 }
1800 
1801 static jobjectArray get_class_declared_methods_helper(
1802                                   JNIEnv *env,
1803                                   jclass ofClass, jboolean publicOnly,
1804                                   bool want_constructor,
1805                                   Klass* klass, TRAPS) {
1806 
1807   JvmtiVMObjectAllocEventCollector oam;
1808 
1809   // Exclude primitive types and array types
1810   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1811       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1812     // Return empty array
1813     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1814     return (jobjectArray) JNIHandles::make_local(env, res);
1815   }
1816 
1817   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1818 
1819   // Ensure class is linked
1820   k->link_class(CHECK_NULL);
1821 
1822   Array<Method*>* methods = k->methods();
1823   int methods_length = methods->length();
1824 
1825   // Save original method_idnum in case of redefinition, which can change
1826   // the idnum of obsolete methods.  The new method will have the same idnum
1827   // but if we refresh the methods array, the counts will be wrong.
1828   ResourceMark rm(THREAD);
1829   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1830   int num_methods = 0;
1831 
1832   for (int i = 0; i < methods_length; i++) {
1833     methodHandle method(THREAD, methods->at(i));
1834     if (select_method(method, want_constructor)) {
1835       if (!publicOnly || method->is_public()) {
1836         idnums->push(method->method_idnum());
1837         ++num_methods;
1838       }
1839     }
1840   }
1841 
1842   // Allocate result
1843   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1844   objArrayHandle result (THREAD, r);
1845 
1846   // Now just put the methods that we selected above, but go by their idnum
1847   // in case of redefinition.  The methods can be redefined at any safepoint,
1848   // so above when allocating the oop array and below when creating reflect
1849   // objects.
1850   for (int i = 0; i < num_methods; i++) {
1851     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1852     if (method.is_null()) {
1853       // Method may have been deleted and seems this API can handle null
1854       // Otherwise should probably put a method that throws NSME
1855       result->obj_at_put(i, NULL);
1856     } else {
1857       oop m;
1858       if (want_constructor) {
1859         m = Reflection::new_constructor(method, CHECK_NULL);
1860       } else {
1861         m = Reflection::new_method(method, false, CHECK_NULL);
1862       }
1863       result->obj_at_put(i, m);
1864     }
1865   }
1866 
1867   return (jobjectArray) JNIHandles::make_local(env, result());
1868 }
1869 
1870 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1871 {
1872   JVMWrapper("JVM_GetClassDeclaredMethods");
1873   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1874                                            /*want_constructor*/ false,
1875                                            SystemDictionary::reflect_Method_klass(), THREAD);
1876 }
1877 JVM_END
1878 
1879 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1880 {
1881   JVMWrapper("JVM_GetClassDeclaredConstructors");
1882   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1883                                            /*want_constructor*/ true,
1884                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
1885 }
1886 JVM_END
1887 
1888 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1889 {
1890   JVMWrapper("JVM_GetClassAccessFlags");
1891   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1892     // Primitive type
1893     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1894   }
1895 
1896   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1897   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1898 }
1899 JVM_END
1900 
1901 
1902 // Constant pool access //////////////////////////////////////////////////////////
1903 
1904 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1905 {
1906   JVMWrapper("JVM_GetClassConstantPool");
1907   JvmtiVMObjectAllocEventCollector oam;
1908 
1909   // Return null for primitives and arrays
1910   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1911     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1912     if (k->is_instance_klass()) {
1913       InstanceKlass* k_h = InstanceKlass::cast(k);
1914       Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1915       reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1916       return JNIHandles::make_local(jcp());
1917     }
1918   }
1919   return NULL;
1920 }
1921 JVM_END
1922 
1923 
1924 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1925 {
1926   JVMWrapper("JVM_ConstantPoolGetSize");
1927   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1928   return cp->length();
1929 }
1930 JVM_END
1931 
1932 
1933 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1934 {
1935   JVMWrapper("JVM_ConstantPoolGetClassAt");
1936   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1937   bounds_check(cp, index, CHECK_NULL);
1938   constantTag tag = cp->tag_at(index);
1939   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1940     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1941   }
1942   Klass* k = cp->klass_at(index, CHECK_NULL);
1943   return (jclass) JNIHandles::make_local(k->java_mirror());
1944 }
1945 JVM_END
1946 
1947 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1948 {
1949   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1950   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1951   bounds_check(cp, index, CHECK_NULL);
1952   constantTag tag = cp->tag_at(index);
1953   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1954     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1955   }
1956   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1957   if (k == NULL) return NULL;
1958   return (jclass) JNIHandles::make_local(k->java_mirror());
1959 }
1960 JVM_END
1961 
1962 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1963   constantTag tag = cp->tag_at(index);
1964   if (!tag.is_method() && !tag.is_interface_method()) {
1965     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1966   }
1967   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1968   Klass* k_o;
1969   if (force_resolution) {
1970     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1971   } else {
1972     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1973     if (k_o == NULL) return NULL;
1974   }
1975   InstanceKlass* k = InstanceKlass::cast(k_o);
1976   Symbol* name = cp->uncached_name_ref_at(index);
1977   Symbol* sig  = cp->uncached_signature_ref_at(index);
1978   methodHandle m (THREAD, k->find_method(name, sig));
1979   if (m.is_null()) {
1980     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1981   }
1982   oop method;
1983   if (!m->is_initializer() || m->is_static()) {
1984     method = Reflection::new_method(m, true, CHECK_NULL);
1985   } else {
1986     method = Reflection::new_constructor(m, CHECK_NULL);
1987   }
1988   return JNIHandles::make_local(method);
1989 }
1990 
1991 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1992 {
1993   JVMWrapper("JVM_ConstantPoolGetMethodAt");
1994   JvmtiVMObjectAllocEventCollector oam;
1995   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1996   bounds_check(cp, index, CHECK_NULL);
1997   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1998   return res;
1999 }
2000 JVM_END
2001 
2002 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2003 {
2004   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2005   JvmtiVMObjectAllocEventCollector oam;
2006   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2007   bounds_check(cp, index, CHECK_NULL);
2008   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2009   return res;
2010 }
2011 JVM_END
2012 
2013 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2014   constantTag tag = cp->tag_at(index);
2015   if (!tag.is_field()) {
2016     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2017   }
2018   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2019   Klass* k_o;
2020   if (force_resolution) {
2021     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2022   } else {
2023     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2024     if (k_o == NULL) return NULL;
2025   }
2026   InstanceKlass* k = InstanceKlass::cast(k_o);
2027   Symbol* name = cp->uncached_name_ref_at(index);
2028   Symbol* sig  = cp->uncached_signature_ref_at(index);
2029   fieldDescriptor fd;
2030   Klass* target_klass = k->find_field(name, sig, &fd);
2031   if (target_klass == NULL) {
2032     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2033   }
2034   oop field = Reflection::new_field(&fd, CHECK_NULL);
2035   return JNIHandles::make_local(field);
2036 }
2037 
2038 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2039 {
2040   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2041   JvmtiVMObjectAllocEventCollector oam;
2042   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2043   bounds_check(cp, index, CHECK_NULL);
2044   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2045   return res;
2046 }
2047 JVM_END
2048 
2049 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2050 {
2051   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2052   JvmtiVMObjectAllocEventCollector oam;
2053   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2054   bounds_check(cp, index, CHECK_NULL);
2055   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2056   return res;
2057 }
2058 JVM_END
2059 
2060 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2061 {
2062   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2063   JvmtiVMObjectAllocEventCollector oam;
2064   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2065   bounds_check(cp, index, CHECK_NULL);
2066   constantTag tag = cp->tag_at(index);
2067   if (!tag.is_field_or_method()) {
2068     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2069   }
2070   int klass_ref = cp->uncached_klass_ref_index_at(index);
2071   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2072   Symbol*  member_name = cp->uncached_name_ref_at(index);
2073   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2074   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2075   objArrayHandle dest(THREAD, dest_o);
2076   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2077   dest->obj_at_put(0, str());
2078   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2079   dest->obj_at_put(1, str());
2080   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2081   dest->obj_at_put(2, str());
2082   return (jobjectArray) JNIHandles::make_local(dest());
2083 }
2084 JVM_END
2085 
2086 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2087 {
2088   JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2089   JvmtiVMObjectAllocEventCollector oam;
2090   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2091   bounds_check(cp, index, CHECK_0);
2092   constantTag tag = cp->tag_at(index);
2093   if (!tag.is_field_or_method()) {
2094     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2095   }
2096   return (jint) cp->uncached_klass_ref_index_at(index);
2097 }
2098 JVM_END
2099 
2100 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2101 {
2102   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2103   JvmtiVMObjectAllocEventCollector oam;
2104   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2105   bounds_check(cp, index, CHECK_0);
2106   constantTag tag = cp->tag_at(index);
2107   if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2108     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2109   }
2110   return (jint) cp->uncached_name_and_type_ref_index_at(index);
2111 }
2112 JVM_END
2113 
2114 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2115 {
2116   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2117   JvmtiVMObjectAllocEventCollector oam;
2118   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2119   bounds_check(cp, index, CHECK_NULL);
2120   constantTag tag = cp->tag_at(index);
2121   if (!tag.is_name_and_type()) {
2122     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2123   }
2124   Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2125   Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2126   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2127   objArrayHandle dest(THREAD, dest_o);
2128   Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2129   dest->obj_at_put(0, str());
2130   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2131   dest->obj_at_put(1, str());
2132   return (jobjectArray) JNIHandles::make_local(dest());
2133 }
2134 JVM_END
2135 
2136 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2137 {
2138   JVMWrapper("JVM_ConstantPoolGetIntAt");
2139   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2140   bounds_check(cp, index, CHECK_0);
2141   constantTag tag = cp->tag_at(index);
2142   if (!tag.is_int()) {
2143     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2144   }
2145   return cp->int_at(index);
2146 }
2147 JVM_END
2148 
2149 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2150 {
2151   JVMWrapper("JVM_ConstantPoolGetLongAt");
2152   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2153   bounds_check(cp, index, CHECK_(0L));
2154   constantTag tag = cp->tag_at(index);
2155   if (!tag.is_long()) {
2156     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2157   }
2158   return cp->long_at(index);
2159 }
2160 JVM_END
2161 
2162 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2163 {
2164   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2165   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2166   bounds_check(cp, index, CHECK_(0.0f));
2167   constantTag tag = cp->tag_at(index);
2168   if (!tag.is_float()) {
2169     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2170   }
2171   return cp->float_at(index);
2172 }
2173 JVM_END
2174 
2175 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2176 {
2177   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2178   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2179   bounds_check(cp, index, CHECK_(0.0));
2180   constantTag tag = cp->tag_at(index);
2181   if (!tag.is_double()) {
2182     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2183   }
2184   return cp->double_at(index);
2185 }
2186 JVM_END
2187 
2188 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2189 {
2190   JVMWrapper("JVM_ConstantPoolGetStringAt");
2191   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2192   bounds_check(cp, index, CHECK_NULL);
2193   constantTag tag = cp->tag_at(index);
2194   if (!tag.is_string()) {
2195     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2196   }
2197   oop str = cp->string_at(index, CHECK_NULL);
2198   return (jstring) JNIHandles::make_local(str);
2199 }
2200 JVM_END
2201 
2202 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2203 {
2204   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2205   JvmtiVMObjectAllocEventCollector oam;
2206   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2207   bounds_check(cp, index, CHECK_NULL);
2208   constantTag tag = cp->tag_at(index);
2209   if (!tag.is_symbol()) {
2210     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2211   }
2212   Symbol* sym = cp->symbol_at(index);
2213   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2214   return (jstring) JNIHandles::make_local(str());
2215 }
2216 JVM_END
2217 
2218 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2219 {
2220   JVMWrapper("JVM_ConstantPoolGetTagAt");
2221   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2222   bounds_check(cp, index, CHECK_0);
2223   constantTag tag = cp->tag_at(index);
2224   jbyte result = tag.value();
2225   // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2226   // they are changed to the corresponding tags from the JVM spec, so that java code in
2227   // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2228   if (tag.is_klass_or_reference()) {
2229       result = JVM_CONSTANT_Class;
2230   } else if (tag.is_string_index()) {
2231       result = JVM_CONSTANT_String;
2232   } else if (tag.is_method_type_in_error()) {
2233       result = JVM_CONSTANT_MethodType;
2234   } else if (tag.is_method_handle_in_error()) {
2235       result = JVM_CONSTANT_MethodHandle;
2236   }
2237   return result;
2238 }
2239 JVM_END
2240 
2241 // Assertion support. //////////////////////////////////////////////////////////
2242 
2243 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2244   JVMWrapper("JVM_DesiredAssertionStatus");
2245   assert(cls != NULL, "bad class");
2246 
2247   oop r = JNIHandles::resolve(cls);
2248   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2249   if (java_lang_Class::is_primitive(r)) return false;
2250 
2251   Klass* k = java_lang_Class::as_Klass(r);
2252   assert(k->is_instance_klass(), "must be an instance klass");
2253   if (!k->is_instance_klass()) return false;
2254 
2255   ResourceMark rm(THREAD);
2256   const char* name = k->name()->as_C_string();
2257   bool system_class = k->class_loader() == NULL;
2258   return JavaAssertions::enabled(name, system_class);
2259 
2260 JVM_END
2261 
2262 
2263 // Return a new AssertionStatusDirectives object with the fields filled in with
2264 // command-line assertion arguments (i.e., -ea, -da).
2265 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2266   JVMWrapper("JVM_AssertionStatusDirectives");
2267   JvmtiVMObjectAllocEventCollector oam;
2268   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2269   return JNIHandles::make_local(env, asd);
2270 JVM_END
2271 
2272 // Verification ////////////////////////////////////////////////////////////////////////////////
2273 
2274 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2275 
2276 // RedefineClasses support: bug 6214132 caused verification to fail.
2277 // All functions from this section should call the jvmtiThreadSate function:
2278 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2279 // The function returns a Klass* of the _scratch_class if the verifier
2280 // was invoked in the middle of the class redefinition.
2281 // Otherwise it returns its argument value which is the _the_class Klass*.
2282 // Please, refer to the description in the jvmtiThreadSate.hpp.
2283 
2284 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2285   JVMWrapper("JVM_GetClassNameUTF");
2286   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2287   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2288   return k->name()->as_utf8();
2289 JVM_END
2290 
2291 
2292 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2293   JVMWrapper("JVM_GetClassCPTypes");
2294   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2295   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2296   // types will have length zero if this is not an InstanceKlass
2297   // (length is determined by call to JVM_GetClassCPEntriesCount)
2298   if (k->is_instance_klass()) {
2299     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2300     for (int index = cp->length() - 1; index >= 0; index--) {
2301       constantTag tag = cp->tag_at(index);
2302       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2303     }
2304   }
2305 JVM_END
2306 
2307 
2308 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2309   JVMWrapper("JVM_GetClassCPEntriesCount");
2310   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2311   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2312   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2313 JVM_END
2314 
2315 
2316 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2317   JVMWrapper("JVM_GetClassFieldsCount");
2318   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2319   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2321 JVM_END
2322 
2323 
2324 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2325   JVMWrapper("JVM_GetClassMethodsCount");
2326   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2327   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2328   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2329 JVM_END
2330 
2331 
2332 // The following methods, used for the verifier, are never called with
2333 // array klasses, so a direct cast to InstanceKlass is safe.
2334 // Typically, these methods are called in a loop with bounds determined
2335 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2336 // zero for arrays.
2337 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2338   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
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   int length = method->checked_exceptions_length();
2343   if (length > 0) {
2344     CheckedExceptionElement* table= method->checked_exceptions_start();
2345     for (int i = 0; i < length; i++) {
2346       exceptions[i] = table[i].class_cp_index;
2347     }
2348   }
2349 JVM_END
2350 
2351 
2352 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2353   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2354   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2355   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2356   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2357   return method->checked_exceptions_length();
2358 JVM_END
2359 
2360 
2361 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2362   JVMWrapper("JVM_GetMethodIxByteCode");
2363   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2364   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2365   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2366   memcpy(code, method->code_base(), method->code_size());
2367 JVM_END
2368 
2369 
2370 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2371   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2372   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2373   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2374   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2375   return method->code_size();
2376 JVM_END
2377 
2378 
2379 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2380   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2381   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2382   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2383   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2384   ExceptionTable extable(method);
2385   entry->start_pc   = extable.start_pc(entry_index);
2386   entry->end_pc     = extable.end_pc(entry_index);
2387   entry->handler_pc = extable.handler_pc(entry_index);
2388   entry->catchType  = extable.catch_type_index(entry_index);
2389 JVM_END
2390 
2391 
2392 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2393   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2394   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2395   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2396   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2397   return method->exception_table_length();
2398 JVM_END
2399 
2400 
2401 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2402   JVMWrapper("JVM_GetMethodIxModifiers");
2403   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2404   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2405   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2406   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2407 JVM_END
2408 
2409 
2410 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2411   JVMWrapper("JVM_GetFieldIxModifiers");
2412   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2413   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2414   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2415 JVM_END
2416 
2417 
2418 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2419   JVMWrapper("JVM_GetMethodIxLocalsCount");
2420   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2421   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2422   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2423   return method->max_locals();
2424 JVM_END
2425 
2426 
2427 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2428   JVMWrapper("JVM_GetMethodIxArgsSize");
2429   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2430   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2431   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2432   return method->size_of_parameters();
2433 JVM_END
2434 
2435 
2436 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2437   JVMWrapper("JVM_GetMethodIxMaxStack");
2438   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2439   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2440   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2441   return method->verifier_max_stack();
2442 JVM_END
2443 
2444 
2445 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2446   JVMWrapper("JVM_IsConstructorIx");
2447   ResourceMark rm(THREAD);
2448   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2449   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2450   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2451   return method->name() == vmSymbols::object_initializer_name();
2452 JVM_END
2453 
2454 
2455 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2456   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2457   ResourceMark rm(THREAD);
2458   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2459   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2460   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2461   return method->is_overpass();
2462 JVM_END
2463 
2464 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2465   JVMWrapper("JVM_GetMethodIxIxUTF");
2466   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2467   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2468   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2469   return method->name()->as_utf8();
2470 JVM_END
2471 
2472 
2473 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2474   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2475   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2476   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2477   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2478   return method->signature()->as_utf8();
2479 JVM_END
2480 
2481 /**
2482  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2483  * read entries in the constant pool.  Since the old verifier always
2484  * works on a copy of the code, it will not see any rewriting that
2485  * may possibly occur in the middle of verification.  So it is important
2486  * that nothing it calls tries to use the cpCache instead of the raw
2487  * constant pool, so we must use cp->uncached_x methods when appropriate.
2488  */
2489 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2490   JVMWrapper("JVM_GetCPFieldNameUTF");
2491   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2492   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2493   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2494   switch (cp->tag_at(cp_index).value()) {
2495     case JVM_CONSTANT_Fieldref:
2496       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2497     default:
2498       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2499   }
2500   ShouldNotReachHere();
2501   return NULL;
2502 JVM_END
2503 
2504 
2505 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2506   JVMWrapper("JVM_GetCPMethodNameUTF");
2507   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2508   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2509   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2510   switch (cp->tag_at(cp_index).value()) {
2511     case JVM_CONSTANT_InterfaceMethodref:
2512     case JVM_CONSTANT_Methodref:
2513       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2514     default:
2515       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2516   }
2517   ShouldNotReachHere();
2518   return NULL;
2519 JVM_END
2520 
2521 
2522 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2523   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2524   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2525   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2526   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2527   switch (cp->tag_at(cp_index).value()) {
2528     case JVM_CONSTANT_InterfaceMethodref:
2529     case JVM_CONSTANT_Methodref:
2530       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2531     default:
2532       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2533   }
2534   ShouldNotReachHere();
2535   return NULL;
2536 JVM_END
2537 
2538 
2539 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2540   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2541   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2542   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2543   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2544   switch (cp->tag_at(cp_index).value()) {
2545     case JVM_CONSTANT_Fieldref:
2546       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2547     default:
2548       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2549   }
2550   ShouldNotReachHere();
2551   return NULL;
2552 JVM_END
2553 
2554 
2555 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2556   JVMWrapper("JVM_GetCPClassNameUTF");
2557   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2558   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2559   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2560   Symbol* classname = cp->klass_name_at(cp_index);
2561   return classname->as_utf8();
2562 JVM_END
2563 
2564 
2565 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2566   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2567   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2568   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2569   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2570   switch (cp->tag_at(cp_index).value()) {
2571     case JVM_CONSTANT_Fieldref: {
2572       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2573       Symbol* classname = cp->klass_name_at(class_index);
2574       return classname->as_utf8();
2575     }
2576     default:
2577       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2578   }
2579   ShouldNotReachHere();
2580   return NULL;
2581 JVM_END
2582 
2583 
2584 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2585   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2586   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2587   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2588   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2589   switch (cp->tag_at(cp_index).value()) {
2590     case JVM_CONSTANT_Methodref:
2591     case JVM_CONSTANT_InterfaceMethodref: {
2592       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2593       Symbol* classname = cp->klass_name_at(class_index);
2594       return classname->as_utf8();
2595     }
2596     default:
2597       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2598   }
2599   ShouldNotReachHere();
2600   return NULL;
2601 JVM_END
2602 
2603 
2604 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2605   JVMWrapper("JVM_GetCPFieldModifiers");
2606   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2607   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2608   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2609   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2610   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2611   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2612   switch (cp->tag_at(cp_index).value()) {
2613     case JVM_CONSTANT_Fieldref: {
2614       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2615       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2616       InstanceKlass* ik = InstanceKlass::cast(k_called);
2617       for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2618         if (fs.name() == name && fs.signature() == signature) {
2619           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2620         }
2621       }
2622       return -1;
2623     }
2624     default:
2625       fatal("JVM_GetCPFieldModifiers: illegal constant");
2626   }
2627   ShouldNotReachHere();
2628   return 0;
2629 JVM_END
2630 
2631 
2632 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2633   JVMWrapper("JVM_GetCPMethodModifiers");
2634   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2635   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2636   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2637   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2638   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2639   switch (cp->tag_at(cp_index).value()) {
2640     case JVM_CONSTANT_Methodref:
2641     case JVM_CONSTANT_InterfaceMethodref: {
2642       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2643       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2644       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2645       int methods_count = methods->length();
2646       for (int i = 0; i < methods_count; i++) {
2647         Method* method = methods->at(i);
2648         if (method->name() == name && method->signature() == signature) {
2649             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2650         }
2651       }
2652       return -1;
2653     }
2654     default:
2655       fatal("JVM_GetCPMethodModifiers: illegal constant");
2656   }
2657   ShouldNotReachHere();
2658   return 0;
2659 JVM_END
2660 
2661 
2662 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2663 
2664 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2665   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2666 JVM_END
2667 
2668 
2669 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2670   JVMWrapper("JVM_IsSameClassPackage");
2671   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2672   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2673   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2674   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2675   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2676 JVM_END
2677 
2678 // Printing support //////////////////////////////////////////////////
2679 extern "C" {
2680 
2681 ATTRIBUTE_PRINTF(3, 0)
2682 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2683   // see bug 4399518, 4417214
2684   if ((intptr_t)count <= 0) return -1;
2685 
2686   int result = vsnprintf(str, count, fmt, args);
2687   // Note: on truncation vsnprintf(3) on Unix returns numbers of
2688   // characters which would have been written had the buffer been large
2689   // enough; on Windows, it returns -1. We handle both cases here and
2690   // always return -1, and perform null termination.
2691   if ((result > 0 && (size_t)result >= count) || result == -1) {
2692     str[count - 1] = '\0';
2693     result = -1;
2694   }
2695 
2696   return result;
2697 }
2698 
2699 ATTRIBUTE_PRINTF(3, 0)
2700 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2701   va_list args;
2702   int len;
2703   va_start(args, fmt);
2704   len = jio_vsnprintf(str, count, fmt, args);
2705   va_end(args);
2706   return len;
2707 }
2708 
2709 ATTRIBUTE_PRINTF(2,3)
2710 int jio_fprintf(FILE* f, const char *fmt, ...) {
2711   int len;
2712   va_list args;
2713   va_start(args, fmt);
2714   len = jio_vfprintf(f, fmt, args);
2715   va_end(args);
2716   return len;
2717 }
2718 
2719 ATTRIBUTE_PRINTF(2, 0)
2720 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2721   if (Arguments::vfprintf_hook() != NULL) {
2722      return Arguments::vfprintf_hook()(f, fmt, args);
2723   } else {
2724     return vfprintf(f, fmt, args);
2725   }
2726 }
2727 
2728 ATTRIBUTE_PRINTF(1, 2)
2729 JNIEXPORT int jio_printf(const char *fmt, ...) {
2730   int len;
2731   va_list args;
2732   va_start(args, fmt);
2733   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2734   va_end(args);
2735   return len;
2736 }
2737 
2738 
2739 // HotSpot specific jio method
2740 void jio_print(const char* s) {
2741   // Try to make this function as atomic as possible.
2742   if (Arguments::vfprintf_hook() != NULL) {
2743     jio_fprintf(defaultStream::output_stream(), "%s", s);
2744   } else {
2745     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2746     size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2747   }
2748 }
2749 
2750 } // Extern C
2751 
2752 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2753 
2754 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2755 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2756 // OSThread objects.  The exception to this rule is when the target object is the thread
2757 // doing the operation, in which case we know that the thread won't exit until the
2758 // operation is done (all exits being voluntary).  There are a few cases where it is
2759 // rather silly to do operations on yourself, like resuming yourself or asking whether
2760 // you are alive.  While these can still happen, they are not subject to deadlocks if
2761 // the lock is held while the operation occurs (this is not the case for suspend, for
2762 // instance), and are very unlikely.  Because IsAlive needs to be fast and its
2763 // implementation is local to this file, we always lock Threads_lock for that one.
2764 
2765 static void thread_entry(JavaThread* thread, TRAPS) {
2766   HandleMark hm(THREAD);
2767   Handle obj(THREAD, thread->threadObj());
2768   JavaValue result(T_VOID);
2769   JavaCalls::call_virtual(&result,
2770                           obj,
2771                           SystemDictionary::Thread_klass(),
2772                           vmSymbols::run_method_name(),
2773                           vmSymbols::void_method_signature(),
2774                           THREAD);
2775 }
2776 
2777 
2778 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2779   JVMWrapper("JVM_StartThread");
2780   JavaThread *native_thread = NULL;
2781 
2782   // We cannot hold the Threads_lock when we throw an exception,
2783   // due to rank ordering issues. Example:  we might need to grab the
2784   // Heap_lock while we construct the exception.
2785   bool throw_illegal_thread_state = false;
2786 
2787   // We must release the Threads_lock before we can post a jvmti event
2788   // in Thread::start.
2789   {
2790     // Ensure that the C++ Thread and OSThread structures aren't freed before
2791     // we operate.
2792     MutexLocker mu(Threads_lock);
2793 
2794     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2795     // re-starting an already started thread, so we should usually find
2796     // that the JavaThread is null. However for a JNI attached thread
2797     // there is a small window between the Thread object being created
2798     // (with its JavaThread set) and the update to its threadStatus, so we
2799     // have to check for this
2800     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2801       throw_illegal_thread_state = true;
2802     } else {
2803       // We could also check the stillborn flag to see if this thread was already stopped, but
2804       // for historical reasons we let the thread detect that itself when it starts running
2805 
2806       jlong size =
2807              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2808       // Allocate the C++ Thread structure and create the native thread.  The
2809       // stack size retrieved from java is 64-bit signed, but the constructor takes
2810       // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2811       //  - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2812       //  - Avoid passing negative values which would result in really large stacks.
2813       NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2814       size_t sz = size > 0 ? (size_t) size : 0;
2815       native_thread = new JavaThread(&thread_entry, sz);
2816 
2817       // At this point it may be possible that no osthread was created for the
2818       // JavaThread due to lack of memory. Check for this situation and throw
2819       // an exception if necessary. Eventually we may want to change this so
2820       // that we only grab the lock if the thread was created successfully -
2821       // then we can also do this check and throw the exception in the
2822       // JavaThread constructor.
2823       if (native_thread->osthread() != NULL) {
2824         // Note: the current thread is not being used within "prepare".
2825         native_thread->prepare(jthread);
2826       }
2827     }
2828   }
2829 
2830   if (throw_illegal_thread_state) {
2831     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2832   }
2833 
2834   assert(native_thread != NULL, "Starting null thread?");
2835 
2836   if (native_thread->osthread() == NULL) {
2837     // No one should hold a reference to the 'native_thread'.
2838     delete native_thread;
2839     if (JvmtiExport::should_post_resource_exhausted()) {
2840       JvmtiExport::post_resource_exhausted(
2841         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2842         os::native_thread_creation_failed_msg());
2843     }
2844     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2845               os::native_thread_creation_failed_msg());
2846   }
2847 
2848   Thread::start(native_thread);
2849 
2850 JVM_END
2851 
2852 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2853 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2854 // but is thought to be reliable and simple. In the case, where the receiver is the
2855 // same thread as the sender, no safepoint is needed.
2856 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2857   JVMWrapper("JVM_StopThread");
2858 
2859   oop java_throwable = JNIHandles::resolve(throwable);
2860   if (java_throwable == NULL) {
2861     THROW(vmSymbols::java_lang_NullPointerException());
2862   }
2863   oop java_thread = JNIHandles::resolve_non_null(jthread);
2864   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2865   Events::log_exception(JavaThread::current(),
2866                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2867                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
2868   // First check if thread is alive
2869   if (receiver != NULL) {
2870     // Check if exception is getting thrown at self (use oop equality, since the
2871     // target object might exit)
2872     if (java_thread == thread->threadObj()) {
2873       THROW_OOP(java_throwable);
2874     } else {
2875       // Enques a VM_Operation to stop all threads and then deliver the exception...
2876       Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2877     }
2878   }
2879   else {
2880     // Either:
2881     // - target thread has not been started before being stopped, or
2882     // - target thread already terminated
2883     // We could read the threadStatus to determine which case it is
2884     // but that is overkill as it doesn't matter. We must set the
2885     // stillborn flag for the first case, and if the thread has already
2886     // exited setting this flag has no affect
2887     java_lang_Thread::set_stillborn(java_thread);
2888   }
2889 JVM_END
2890 
2891 
2892 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2893   JVMWrapper("JVM_IsThreadAlive");
2894 
2895   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2896   return java_lang_Thread::is_alive(thread_oop);
2897 JVM_END
2898 
2899 
2900 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2901   JVMWrapper("JVM_SuspendThread");
2902   oop java_thread = JNIHandles::resolve_non_null(jthread);
2903   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2904 
2905   if (receiver != NULL) {
2906     // thread has run and has not exited (still on threads list)
2907 
2908     {
2909       MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2910       if (receiver->is_external_suspend()) {
2911         // Don't allow nested external suspend requests. We can't return
2912         // an error from this interface so just ignore the problem.
2913         return;
2914       }
2915       if (receiver->is_exiting()) { // thread is in the process of exiting
2916         return;
2917       }
2918       receiver->set_external_suspend();
2919     }
2920 
2921     // java_suspend() will catch threads in the process of exiting
2922     // and will ignore them.
2923     receiver->java_suspend();
2924 
2925     // It would be nice to have the following assertion in all the
2926     // time, but it is possible for a racing resume request to have
2927     // resumed this thread right after we suspended it. Temporarily
2928     // enable this assertion if you are chasing a different kind of
2929     // bug.
2930     //
2931     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2932     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2933   }
2934 JVM_END
2935 
2936 
2937 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2938   JVMWrapper("JVM_ResumeThread");
2939   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2940   // We need to *always* get the threads lock here, since this operation cannot be allowed during
2941   // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2942   // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2943   // looks at it.
2944   MutexLocker ml(Threads_lock);
2945   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2946   if (thr != NULL) {
2947     // the thread has run and is not in the process of exiting
2948     thr->java_resume();
2949   }
2950 JVM_END
2951 
2952 
2953 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2954   JVMWrapper("JVM_SetThreadPriority");
2955   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2956   MutexLocker ml(Threads_lock);
2957   oop java_thread = JNIHandles::resolve_non_null(jthread);
2958   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2959   JavaThread* thr = java_lang_Thread::thread(java_thread);
2960   if (thr != NULL) {                  // Thread not yet started; priority pushed down when it is
2961     Thread::set_priority(thr, (ThreadPriority)prio);
2962   }
2963 JVM_END
2964 
2965 
2966 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2967   JVMWrapper("JVM_Yield");
2968   if (os::dont_yield()) return;
2969   HOTSPOT_THREAD_YIELD();
2970   os::naked_yield();
2971 JVM_END
2972 
2973 
2974 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2975   JVMWrapper("JVM_Sleep");
2976 
2977   if (millis < 0) {
2978     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2979   }
2980 
2981   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2982     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2983   }
2984 
2985   // Save current thread state and restore it at the end of this block.
2986   // And set new thread state to SLEEPING.
2987   JavaThreadSleepState jtss(thread);
2988 
2989   HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2990 
2991   EventThreadSleep event;
2992 
2993   if (millis == 0) {
2994     os::naked_yield();
2995   } else {
2996     ThreadState old_state = thread->osthread()->get_state();
2997     thread->osthread()->set_state(SLEEPING);
2998     if (os::sleep(thread, millis, true) == OS_INTRPT) {
2999       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3000       // us while we were sleeping. We do not overwrite those.
3001       if (!HAS_PENDING_EXCEPTION) {
3002         if (event.should_commit()) {
3003           event.set_time(millis);
3004           event.commit();
3005         }
3006         HOTSPOT_THREAD_SLEEP_END(1);
3007 
3008         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3009         // to properly restore the thread state.  That's likely wrong.
3010         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3011       }
3012     }
3013     thread->osthread()->set_state(old_state);
3014   }
3015   if (event.should_commit()) {
3016     event.set_time(millis);
3017     event.commit();
3018   }
3019   HOTSPOT_THREAD_SLEEP_END(0);
3020 JVM_END
3021 
3022 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3023   JVMWrapper("JVM_CurrentThread");
3024   oop jthread = thread->threadObj();
3025   assert (thread != NULL, "no current thread!");
3026   return JNIHandles::make_local(env, jthread);
3027 JVM_END
3028 
3029 
3030 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3031   JVMWrapper("JVM_CountStackFrames");
3032 
3033   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3034   oop java_thread = JNIHandles::resolve_non_null(jthread);
3035   bool throw_illegal_thread_state = false;
3036   int count = 0;
3037 
3038   {
3039     MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3040     // We need to re-resolve the java_thread, since a GC might have happened during the
3041     // acquire of the lock
3042     JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3043 
3044     if (thr == NULL) {
3045       // do nothing
3046     } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3047       // Check whether this java thread has been suspended already. If not, throws
3048       // IllegalThreadStateException. We defer to throw that exception until
3049       // Threads_lock is released since loading exception class has to leave VM.
3050       // The correct way to test a thread is actually suspended is
3051       // wait_for_ext_suspend_completion(), but we can't call that while holding
3052       // the Threads_lock. The above tests are sufficient for our purposes
3053       // provided the walkability of the stack is stable - which it isn't
3054       // 100% but close enough for most practical purposes.
3055       throw_illegal_thread_state = true;
3056     } else {
3057       // Count all java activation, i.e., number of vframes
3058       for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3059         // Native frames are not counted
3060         if (!vfst.method()->is_native()) count++;
3061        }
3062     }
3063   }
3064 
3065   if (throw_illegal_thread_state) {
3066     THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3067                 "this thread is not suspended");
3068   }
3069   return count;
3070 JVM_END
3071 
3072 // Consider: A better way to implement JVM_Interrupt() is to acquire
3073 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3074 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3075 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3076 // outside the critical section.  Threads_lock is hot so we want to minimize
3077 // the hold-time.  A cleaner interface would be to decompose interrupt into
3078 // two steps.  The 1st phase, performed under Threads_lock, would return
3079 // a closure that'd be invoked after Threads_lock was dropped.
3080 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3081 // admit spurious wakeups.
3082 
3083 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3084   JVMWrapper("JVM_Interrupt");
3085 
3086   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3087   oop java_thread = JNIHandles::resolve_non_null(jthread);
3088   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3089   // We need to re-resolve the java_thread, since a GC might have happened during the
3090   // acquire of the lock
3091   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3092   if (thr != NULL) {
3093     Thread::interrupt(thr);
3094   }
3095 JVM_END
3096 
3097 
3098 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3099   JVMWrapper("JVM_IsInterrupted");
3100 
3101   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3102   oop java_thread = JNIHandles::resolve_non_null(jthread);
3103   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3104   // We need to re-resolve the java_thread, since a GC might have happened during the
3105   // acquire of the lock
3106   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3107   if (thr == NULL) {
3108     return JNI_FALSE;
3109   } else {
3110     return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3111   }
3112 JVM_END
3113 
3114 
3115 // Return true iff the current thread has locked the object passed in
3116 
3117 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3118   JVMWrapper("JVM_HoldsLock");
3119   assert(THREAD->is_Java_thread(), "sanity check");
3120   if (obj == NULL) {
3121     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3122   }
3123   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3124   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3125 JVM_END
3126 
3127 
3128 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3129   JVMWrapper("JVM_DumpAllStacks");
3130   VM_PrintThreads op;
3131   VMThread::execute(&op);
3132   if (JvmtiExport::should_post_data_dump()) {
3133     JvmtiExport::post_data_dump();
3134   }
3135 JVM_END
3136 
3137 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3138   JVMWrapper("JVM_SetNativeThreadName");
3139   ResourceMark rm(THREAD);
3140   oop java_thread = JNIHandles::resolve_non_null(jthread);
3141   JavaThread* thr = java_lang_Thread::thread(java_thread);
3142   // Thread naming only supported for the current thread, doesn't work for
3143   // target threads.
3144   if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3145     // we don't set the name of an attached thread to avoid stepping
3146     // on other programs
3147     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3148     os::set_native_thread_name(thread_name);
3149   }
3150 JVM_END
3151 
3152 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3153 
3154 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3155   assert(jthread->is_Java_thread(), "must be a Java thread");
3156   if (jthread->privileged_stack_top() == NULL) return false;
3157   if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3158     oop loader = jthread->privileged_stack_top()->class_loader();
3159     if (loader == NULL) return true;
3160     bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3161     if (trusted) return true;
3162   }
3163   return false;
3164 }
3165 
3166 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3167   JVMWrapper("JVM_CurrentLoadedClass");
3168   ResourceMark rm(THREAD);
3169 
3170   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3171     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3172     bool trusted = is_trusted_frame(thread, &vfst);
3173     if (trusted) return NULL;
3174 
3175     Method* m = vfst.method();
3176     if (!m->is_native()) {
3177       InstanceKlass* holder = m->method_holder();
3178       oop loader = holder->class_loader();
3179       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3180         return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3181       }
3182     }
3183   }
3184   return NULL;
3185 JVM_END
3186 
3187 
3188 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3189   JVMWrapper("JVM_CurrentClassLoader");
3190   ResourceMark rm(THREAD);
3191 
3192   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3193 
3194     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3195     bool trusted = is_trusted_frame(thread, &vfst);
3196     if (trusted) return NULL;
3197 
3198     Method* m = vfst.method();
3199     if (!m->is_native()) {
3200       InstanceKlass* holder = m->method_holder();
3201       assert(holder->is_klass(), "just checking");
3202       oop loader = holder->class_loader();
3203       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3204         return JNIHandles::make_local(env, loader);
3205       }
3206     }
3207   }
3208   return NULL;
3209 JVM_END
3210 
3211 
3212 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3213   JVMWrapper("JVM_GetClassContext");
3214   ResourceMark rm(THREAD);
3215   JvmtiVMObjectAllocEventCollector oam;
3216   vframeStream vfst(thread);
3217 
3218   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3219     // This must only be called from SecurityManager.getClassContext
3220     Method* m = vfst.method();
3221     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3222           m->name()          == vmSymbols::getClassContext_name() &&
3223           m->signature()     == vmSymbols::void_class_array_signature())) {
3224       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3225     }
3226   }
3227 
3228   // Collect method holders
3229   GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3230   for (; !vfst.at_end(); vfst.security_next()) {
3231     Method* m = vfst.method();
3232     // Native frames are not returned
3233     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3234       Klass* holder = m->method_holder();
3235       assert(holder->is_klass(), "just checking");
3236       klass_array->append(holder);
3237     }
3238   }
3239 
3240   // Create result array of type [Ljava/lang/Class;
3241   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3242   // Fill in mirrors corresponding to method holders
3243   for (int i = 0; i < klass_array->length(); i++) {
3244     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3245   }
3246 
3247   return (jobjectArray) JNIHandles::make_local(env, result);
3248 JVM_END
3249 
3250 
3251 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3252   JVMWrapper("JVM_ClassDepth");
3253   ResourceMark rm(THREAD);
3254   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3255   Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3256 
3257   const char* str = java_lang_String::as_utf8_string(class_name_str());
3258   TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3259   if (class_name_sym == NULL) {
3260     return -1;
3261   }
3262 
3263   int depth = 0;
3264 
3265   for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3266     if (!vfst.method()->is_native()) {
3267       InstanceKlass* holder = vfst.method()->method_holder();
3268       assert(holder->is_klass(), "just checking");
3269       if (holder->name() == class_name_sym) {
3270         return depth;
3271       }
3272       depth++;
3273     }
3274   }
3275   return -1;
3276 JVM_END
3277 
3278 
3279 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3280   JVMWrapper("JVM_ClassLoaderDepth");
3281   ResourceMark rm(THREAD);
3282   int depth = 0;
3283   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3284     // if a method in a class in a trusted loader is in a doPrivileged, return -1
3285     bool trusted = is_trusted_frame(thread, &vfst);
3286     if (trusted) return -1;
3287 
3288     Method* m = vfst.method();
3289     if (!m->is_native()) {
3290       InstanceKlass* holder = m->method_holder();
3291       assert(holder->is_klass(), "just checking");
3292       oop loader = holder->class_loader();
3293       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3294         return depth;
3295       }
3296       depth++;
3297     }
3298   }
3299   return -1;
3300 JVM_END
3301 
3302 
3303 // java.lang.Package ////////////////////////////////////////////////////////////////
3304 
3305 
3306 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3307   JVMWrapper("JVM_GetSystemPackage");
3308   ResourceMark rm(THREAD);
3309   JvmtiVMObjectAllocEventCollector oam;
3310   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3311   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3312   return (jstring) JNIHandles::make_local(result);
3313 JVM_END
3314 
3315 
3316 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3317   JVMWrapper("JVM_GetSystemPackages");
3318   JvmtiVMObjectAllocEventCollector oam;
3319   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3320   return (jobjectArray) JNIHandles::make_local(result);
3321 JVM_END
3322 
3323 
3324 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3325 
3326 
3327 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3328   JVMWrapper("JVM_GetAndClearReferencePendingList");
3329 
3330   MonitorLockerEx ml(Heap_lock);
3331   oop ref = Universe::reference_pending_list();
3332   if (ref != NULL) {
3333     Universe::set_reference_pending_list(NULL);
3334   }
3335   return JNIHandles::make_local(env, ref);
3336 JVM_END
3337 
3338 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3339   JVMWrapper("JVM_HasReferencePendingList");
3340   MonitorLockerEx ml(Heap_lock);
3341   return Universe::has_reference_pending_list();
3342 JVM_END
3343 
3344 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3345   JVMWrapper("JVM_WaitForReferencePendingList");
3346   MonitorLockerEx ml(Heap_lock);
3347   while (!Universe::has_reference_pending_list()) {
3348     ml.wait();
3349   }
3350 JVM_END
3351 
3352 
3353 // ObjectInputStream ///////////////////////////////////////////////////////////////
3354 
3355 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3356   if (current_class == NULL) {
3357     return true;
3358   }
3359   if ((current_class == field_class) || access.is_public()) {
3360     return true;
3361   }
3362 
3363   if (access.is_protected()) {
3364     // See if current_class is a subclass of field_class
3365     if (current_class->is_subclass_of(field_class)) {
3366       return true;
3367     }
3368   }
3369 
3370   return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3371 }
3372 
3373 // Return the first user-defined class loader up the execution stack, or null
3374 // if only code from the bootstrap or platform class loader is on the stack.
3375 
3376 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3377   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3378     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3379     oop loader = vfst.method()->method_holder()->class_loader();
3380     if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3381       return JNIHandles::make_local(env, loader);
3382     }
3383   }
3384   return NULL;
3385 JVM_END
3386 
3387 
3388 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3389 
3390 
3391 // resolve array handle and check arguments
3392 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3393   if (arr == NULL) {
3394     THROW_0(vmSymbols::java_lang_NullPointerException());
3395   }
3396   oop a = JNIHandles::resolve_non_null(arr);
3397   if (!a->is_array()) {
3398     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3399   } else if (type_array_only && !a->is_typeArray()) {
3400     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3401   }
3402   return arrayOop(a);
3403 }
3404 
3405 
3406 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3407   JVMWrapper("JVM_GetArrayLength");
3408   arrayOop a = check_array(env, arr, false, CHECK_0);
3409   return a->length();
3410 JVM_END
3411 
3412 
3413 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3414   JVMWrapper("JVM_Array_Get");
3415   JvmtiVMObjectAllocEventCollector oam;
3416   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3417   jvalue value;
3418   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3419   oop box = Reflection::box(&value, type, CHECK_NULL);
3420   return JNIHandles::make_local(env, box);
3421 JVM_END
3422 
3423 
3424 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3425   JVMWrapper("JVM_GetPrimitiveArrayElement");
3426   jvalue value;
3427   value.i = 0; // to initialize value before getting used in CHECK
3428   arrayOop a = check_array(env, arr, true, CHECK_(value));
3429   assert(a->is_typeArray(), "just checking");
3430   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3431   BasicType wide_type = (BasicType) wCode;
3432   if (type != wide_type) {
3433     Reflection::widen(&value, type, wide_type, CHECK_(value));
3434   }
3435   return value;
3436 JVM_END
3437 
3438 
3439 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3440   JVMWrapper("JVM_SetArrayElement");
3441   arrayOop a = check_array(env, arr, false, CHECK);
3442   oop box = JNIHandles::resolve(val);
3443   jvalue value;
3444   value.i = 0; // to initialize value before getting used in CHECK
3445   BasicType value_type;
3446   if (a->is_objArray()) {
3447     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3448     value_type = Reflection::unbox_for_regular_object(box, &value);
3449   } else {
3450     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3451   }
3452   Reflection::array_set(&value, a, index, value_type, CHECK);
3453 JVM_END
3454 
3455 
3456 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3457   JVMWrapper("JVM_SetPrimitiveArrayElement");
3458   arrayOop a = check_array(env, arr, true, CHECK);
3459   assert(a->is_typeArray(), "just checking");
3460   BasicType value_type = (BasicType) vCode;
3461   Reflection::array_set(&v, a, index, value_type, CHECK);
3462 JVM_END
3463 
3464 
3465 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3466   JVMWrapper("JVM_NewArray");
3467   JvmtiVMObjectAllocEventCollector oam;
3468   oop element_mirror = JNIHandles::resolve(eltClass);
3469   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3470   return JNIHandles::make_local(env, result);
3471 JVM_END
3472 
3473 
3474 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3475   JVMWrapper("JVM_NewMultiArray");
3476   JvmtiVMObjectAllocEventCollector oam;
3477   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3478   oop element_mirror = JNIHandles::resolve(eltClass);
3479   assert(dim_array->is_typeArray(), "just checking");
3480   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3481   return JNIHandles::make_local(env, result);
3482 JVM_END
3483 
3484 
3485 // Library support ///////////////////////////////////////////////////////////////////////////
3486 
3487 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3488   //%note jvm_ct
3489   JVMWrapper("JVM_LoadLibrary");
3490   char ebuf[1024];
3491   void *load_result;
3492   {
3493     ThreadToNativeFromVM ttnfvm(thread);
3494     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3495   }
3496   if (load_result == NULL) {
3497     char msg[1024];
3498     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3499     // Since 'ebuf' may contain a string encoded using
3500     // platform encoding scheme, we need to pass
3501     // Exceptions::unsafe_to_utf8 to the new_exception method
3502     // as the last argument. See bug 6367357.
3503     Handle h_exception =
3504       Exceptions::new_exception(thread,
3505                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3506                                 msg, Exceptions::unsafe_to_utf8);
3507 
3508     THROW_HANDLE_0(h_exception);
3509   }
3510   return load_result;
3511 JVM_END
3512 
3513 
3514 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3515   JVMWrapper("JVM_UnloadLibrary");
3516   os::dll_unload(handle);
3517 JVM_END
3518 
3519 
3520 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3521   JVMWrapper("JVM_FindLibraryEntry");
3522   return os::dll_lookup(handle, name);
3523 JVM_END
3524 
3525 
3526 // JNI version ///////////////////////////////////////////////////////////////////////////////
3527 
3528 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3529   JVMWrapper("JVM_IsSupportedJNIVersion");
3530   return Threads::is_supported_jni_version_including_1_1(version);
3531 JVM_END
3532 
3533 
3534 // String support ///////////////////////////////////////////////////////////////////////////
3535 
3536 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3537   JVMWrapper("JVM_InternString");
3538   JvmtiVMObjectAllocEventCollector oam;
3539   if (str == NULL) return NULL;
3540   oop string = JNIHandles::resolve_non_null(str);
3541   oop result = StringTable::intern(string, CHECK_NULL);
3542   return (jstring) JNIHandles::make_local(env, result);
3543 JVM_END
3544 
3545 
3546 // Raw monitor support //////////////////////////////////////////////////////////////////////
3547 
3548 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3549 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3550 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3551 // that only works with java threads.
3552 
3553 
3554 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3555   VM_Exit::block_if_vm_exited();
3556   JVMWrapper("JVM_RawMonitorCreate");
3557   return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3558 }
3559 
3560 
3561 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3562   VM_Exit::block_if_vm_exited();
3563   JVMWrapper("JVM_RawMonitorDestroy");
3564   delete ((Mutex*) mon);
3565 }
3566 
3567 
3568 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3569   VM_Exit::block_if_vm_exited();
3570   JVMWrapper("JVM_RawMonitorEnter");
3571   ((Mutex*) mon)->jvm_raw_lock();
3572   return 0;
3573 }
3574 
3575 
3576 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3577   VM_Exit::block_if_vm_exited();
3578   JVMWrapper("JVM_RawMonitorExit");
3579   ((Mutex*) mon)->jvm_raw_unlock();
3580 }
3581 
3582 
3583 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3584 
3585 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3586                                     Handle loader, Handle protection_domain,
3587                                     jboolean throwError, TRAPS) {
3588   // Security Note:
3589   //   The Java level wrapper will perform the necessary security check allowing
3590   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
3591   //   the checkPackageAccess relative to the initiating class loader via the
3592   //   protection_domain. The protection_domain is passed as NULL by the java code
3593   //   if there is no security manager in 3-arg Class.forName().
3594   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3595 
3596   // Check if we should initialize the class
3597   if (init && klass->is_instance_klass()) {
3598     klass->initialize(CHECK_NULL);
3599   }
3600   return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3601 }
3602 
3603 
3604 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3605 
3606 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3607   JVMWrapper("JVM_InvokeMethod");
3608   Handle method_handle;
3609   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3610     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3611     Handle receiver(THREAD, JNIHandles::resolve(obj));
3612     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3613     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3614     jobject res = JNIHandles::make_local(env, result);
3615     if (JvmtiExport::should_post_vm_object_alloc()) {
3616       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3617       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3618       if (java_lang_Class::is_primitive(ret_type)) {
3619         // Only for primitive type vm allocates memory for java object.
3620         // See box() method.
3621         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3622       }
3623     }
3624     return res;
3625   } else {
3626     THROW_0(vmSymbols::java_lang_StackOverflowError());
3627   }
3628 JVM_END
3629 
3630 
3631 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3632   JVMWrapper("JVM_NewInstanceFromConstructor");
3633   oop constructor_mirror = JNIHandles::resolve(c);
3634   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3635   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3636   jobject res = JNIHandles::make_local(env, result);
3637   if (JvmtiExport::should_post_vm_object_alloc()) {
3638     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3639   }
3640   return res;
3641 JVM_END
3642 
3643 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3644 
3645 JVM_LEAF(jboolean, JVM_SupportsCX8())
3646   JVMWrapper("JVM_SupportsCX8");
3647   return VM_Version::supports_cx8();
3648 JVM_END
3649 
3650 // Returns an array of all live Thread objects (VM internal JavaThreads,
3651 // jvmti agent threads, and JNI attaching threads  are skipped)
3652 // See CR 6404306 regarding JNI attaching threads
3653 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3654   ResourceMark rm(THREAD);
3655   ThreadsListEnumerator tle(THREAD, false, false);
3656   JvmtiVMObjectAllocEventCollector oam;
3657 
3658   int num_threads = tle.num_threads();
3659   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3660   objArrayHandle threads_ah(THREAD, r);
3661 
3662   for (int i = 0; i < num_threads; i++) {
3663     Handle h = tle.get_threadObj(i);
3664     threads_ah->obj_at_put(i, h());
3665   }
3666 
3667   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3668 JVM_END
3669 
3670 
3671 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3672 // Return StackTraceElement[][], each element is the stack trace of a thread in
3673 // the corresponding entry in the given threads array
3674 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3675   JVMWrapper("JVM_DumpThreads");
3676   JvmtiVMObjectAllocEventCollector oam;
3677 
3678   // Check if threads is null
3679   if (threads == NULL) {
3680     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3681   }
3682 
3683   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3684   objArrayHandle ah(THREAD, a);
3685   int num_threads = ah->length();
3686   // check if threads is non-empty array
3687   if (num_threads == 0) {
3688     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3689   }
3690 
3691   // check if threads is not an array of objects of Thread class
3692   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3693   if (k != SystemDictionary::Thread_klass()) {
3694     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3695   }
3696 
3697   ResourceMark rm(THREAD);
3698 
3699   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3700   for (int i = 0; i < num_threads; i++) {
3701     oop thread_obj = ah->obj_at(i);
3702     instanceHandle h(THREAD, (instanceOop) thread_obj);
3703     thread_handle_array->append(h);
3704   }
3705 
3706   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3707   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3708 
3709 JVM_END
3710 
3711 // JVM monitoring and management support
3712 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3713   return Management::get_jmm_interface(version);
3714 JVM_END
3715 
3716 // com.sun.tools.attach.VirtualMachine agent properties support
3717 //
3718 // Initialize the agent properties with the properties maintained in the VM
3719 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3720   JVMWrapper("JVM_InitAgentProperties");
3721   ResourceMark rm;
3722 
3723   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3724 
3725   PUTPROP(props, "sun.java.command", Arguments::java_command());
3726   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3727   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3728   return properties;
3729 JVM_END
3730 
3731 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3732 {
3733   JVMWrapper("JVM_GetEnclosingMethodInfo");
3734   JvmtiVMObjectAllocEventCollector oam;
3735 
3736   if (ofClass == NULL) {
3737     return NULL;
3738   }
3739   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3740   // Special handling for primitive objects
3741   if (java_lang_Class::is_primitive(mirror())) {
3742     return NULL;
3743   }
3744   Klass* k = java_lang_Class::as_Klass(mirror());
3745   if (!k->is_instance_klass()) {
3746     return NULL;
3747   }
3748   InstanceKlass* ik = InstanceKlass::cast(k);
3749   int encl_method_class_idx = ik->enclosing_method_class_index();
3750   if (encl_method_class_idx == 0) {
3751     return NULL;
3752   }
3753   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3754   objArrayHandle dest(THREAD, dest_o);
3755   Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3756   dest->obj_at_put(0, enc_k->java_mirror());
3757   int encl_method_method_idx = ik->enclosing_method_method_index();
3758   if (encl_method_method_idx != 0) {
3759     Symbol* sym = ik->constants()->symbol_at(
3760                         extract_low_short_from_int(
3761                           ik->constants()->name_and_type_at(encl_method_method_idx)));
3762     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3763     dest->obj_at_put(1, str());
3764     sym = ik->constants()->symbol_at(
3765               extract_high_short_from_int(
3766                 ik->constants()->name_and_type_at(encl_method_method_idx)));
3767     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3768     dest->obj_at_put(2, str());
3769   }
3770   return (jobjectArray) JNIHandles::make_local(dest());
3771 }
3772 JVM_END
3773 
3774 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3775 {
3776   memset(info, 0, info_size);
3777 
3778   info->jvm_version = Abstract_VM_Version::jvm_version();
3779   info->patch_version = Abstract_VM_Version::vm_patch_version();
3780 
3781   // when we add a new capability in the jvm_version_info struct, we should also
3782   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3783   // counter defined in runtimeService.cpp.
3784   info->is_attachable = AttachListener::is_attach_supported();
3785 }
3786 JVM_END
3787 
3788 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3789 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3790   ResourceMark rm(THREAD);
3791 
3792   if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3793     return NULL;
3794   }
3795 
3796   char** vm_flags = Arguments::jvm_flags_array();
3797   char** vm_args = Arguments::jvm_args_array();
3798   int num_flags = Arguments::num_jvm_flags();
3799   int num_args = Arguments::num_jvm_args();
3800 
3801   InstanceKlass* ik = SystemDictionary::String_klass();
3802   objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3803   objArrayHandle result_h(THREAD, r);
3804 
3805   int index = 0;
3806   for (int j = 0; j < num_flags; j++, index++) {
3807     Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3808     result_h->obj_at_put(index, h());
3809   }
3810   for (int i = 0; i < num_args; i++, index++) {
3811     Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3812     result_h->obj_at_put(index, h());
3813   }
3814   return (jobjectArray) JNIHandles::make_local(env, result_h());
3815 JVM_END
3816 
3817 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3818   return os::get_signal_number(name);
3819 JVM_END