1 /*
   2  * Copyright (c) 1997, 2025, 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 "cds/aotClassInitializer.hpp"
  26 #include "cds/aotConstantPoolResolver.hpp"
  27 #include "cds/aotMetaspace.hpp"
  28 #include "cds/cdsConfig.hpp"
  29 #include "cds/classListParser.hpp"
  30 #include "cds/classListWriter.hpp"
  31 #include "cds/dynamicArchive.hpp"
  32 #include "cds/heapShared.hpp"
  33 #include "cds/lambdaFormInvokers.hpp"
  34 #include "cds/lambdaProxyClassDictionary.hpp"
  35 #include "classfile/classFileStream.hpp"
  36 #include "classfile/classLoader.inline.hpp"
  37 #include "classfile/classLoaderData.inline.hpp"
  38 #include "classfile/classLoadInfo.hpp"
  39 #include "classfile/javaAssertions.hpp"
  40 #include "classfile/javaClasses.inline.hpp"
  41 #include "classfile/moduleEntry.hpp"
  42 #include "classfile/modules.hpp"
  43 #include "classfile/packageEntry.hpp"
  44 #include "classfile/stringTable.hpp"
  45 #include "classfile/symbolTable.hpp"
  46 #include "classfile/systemDictionary.hpp"
  47 #include "classfile/vmClasses.hpp"
  48 #include "classfile/vmSymbols.hpp"
  49 #include "gc/shared/collectedHeap.inline.hpp"
  50 #include "interpreter/bytecode.hpp"
  51 #include "interpreter/bytecodeUtils.hpp"
  52 #include "jfr/jfrEvents.hpp"
  53 #include "jvm.h"
  54 #include "logging/log.hpp"
  55 #include "memory/oopFactory.hpp"
  56 #include "memory/referenceType.hpp"
  57 #include "memory/resourceArea.hpp"
  58 #include "memory/universe.hpp"
  59 #include "oops/access.inline.hpp"
  60 #include "oops/constantPool.hpp"
  61 #include "oops/fieldStreams.inline.hpp"
  62 #include "oops/instanceKlass.hpp"
  63 #include "oops/klass.inline.hpp"
  64 #include "oops/method.hpp"
  65 #include "oops/objArrayKlass.hpp"
  66 #include "oops/objArrayOop.inline.hpp"
  67 #include "oops/oop.inline.hpp"
  68 #include "oops/recordComponent.hpp"
  69 #include "prims/foreignGlobals.hpp"
  70 #include "prims/jvm_misc.hpp"
  71 #include "prims/jvmtiExport.hpp"
  72 #include "prims/jvmtiThreadState.inline.hpp"
  73 #include "prims/stackwalk.hpp"
  74 #include "runtime/arguments.hpp"
  75 #include "runtime/atomicAccess.hpp"
  76 #include "runtime/continuation.hpp"
  77 #include "runtime/deoptimization.hpp"
  78 #include "runtime/globals_extension.hpp"
  79 #include "runtime/handles.inline.hpp"
  80 #include "runtime/handshake.hpp"
  81 #include "runtime/init.hpp"
  82 #include "runtime/interfaceSupport.inline.hpp"
  83 #include "runtime/java.hpp"
  84 #include "runtime/javaCalls.hpp"
  85 #include "runtime/javaThread.hpp"
  86 #include "runtime/jfieldIDWorkaround.hpp"
  87 #include "runtime/jniHandles.inline.hpp"
  88 #include "runtime/os.inline.hpp"
  89 #include "runtime/osThread.hpp"
  90 #include "runtime/perfData.inline.hpp"
  91 #include "runtime/reflection.hpp"
  92 #include "runtime/synchronizer.hpp"
  93 #include "runtime/threadIdentifier.hpp"
  94 #include "runtime/threadSMR.hpp"
  95 #include "runtime/vframe.inline.hpp"
  96 #include "runtime/vm_version.hpp"
  97 #include "runtime/vmOperations.hpp"
  98 #include "services/attachListener.hpp"
  99 #include "services/management.hpp"
 100 #include "services/threadService.hpp"
 101 #include "utilities/checkedCast.hpp"
 102 #include "utilities/copy.hpp"
 103 #include "utilities/defaultStream.hpp"
 104 #include "utilities/dtrace.hpp"
 105 #include "utilities/events.hpp"
 106 #include "utilities/macros.hpp"
 107 #include "utilities/utf8.hpp"
 108 #include "utilities/zipLibrary.hpp"
 109 #if INCLUDE_CDS
 110 #include "classfile/systemDictionaryShared.hpp"
 111 #endif
 112 #if INCLUDE_JFR
 113 #include "jfr/jfr.hpp"
 114 #endif
 115 #if INCLUDE_MANAGEMENT
 116 #include "services/finalizerService.hpp"
 117 #endif
 118 #ifdef LINUX
 119 #include "osContainer_linux.hpp"
 120 #endif
 121 
 122 #include <errno.h>
 123 
 124 /*
 125   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
 126   such ctors and calls MUST NOT come between an oop declaration/init and its
 127   usage because if objects are move this may cause various memory stomps, bus
 128   errors and segfaults. Here is a cookbook for causing so called "naked oop
 129   failures":
 130 
 131       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
 132           // Object address to be held directly in mirror & not visible to GC
 133           oop mirror = JNIHandles::resolve_non_null(ofClass);
 134 
 135           // If this ctor can hit a safepoint, moving objects around, then
 136           ComplexConstructor foo;
 137 
 138           // Boom! mirror may point to JUNK instead of the intended object
 139           (some dereference of mirror)
 140 
 141           // Here's another call that may block for GC, making mirror stale
 142           MutexLocker ml(some_lock);
 143 
 144           // And here's an initializer that can result in a stale oop
 145           // all in one step.
 146           oop o = call_that_can_throw_exception(TRAPS);
 147 
 148 
 149   The solution is to keep the oop declaration BELOW the ctor or function
 150   call that might cause a GC, do another resolve to reassign the oop, or
 151   consider use of a Handle instead of an oop so there is immunity from object
 152   motion. But note that the "QUICK" entries below do not have a handlemark
 153   and thus can only support use of handles passed in.
 154 */
 155 
 156 extern void trace_class_resolution(Klass* to_class) {
 157   ResourceMark rm;
 158   int line_number = -1;
 159   const char * source_file = nullptr;
 160   const char * trace = "explicit";
 161   InstanceKlass* caller = nullptr;
 162   JavaThread* jthread = JavaThread::current();
 163   if (jthread->has_last_Java_frame()) {
 164     vframeStream vfst(jthread);
 165 
 166     // Scan up the stack skipping ClassLoader frames.
 167     Method* last_caller = nullptr;
 168 
 169     while (!vfst.at_end()) {
 170       Method* m = vfst.method();
 171       if (!vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass())) {
 172         break;
 173       }
 174       last_caller = m;
 175       vfst.next();
 176     }
 177     // if this is called from Class.forName0 and that is called from Class.forName,
 178     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 179     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 180     bool found_it = false;
 181     if (!vfst.at_end() &&
 182         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 183         vfst.method()->name() == vmSymbols::forName0_name()) {
 184       vfst.next();
 185       if (!vfst.at_end() &&
 186           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 187           vfst.method()->name() == vmSymbols::forName_name()) {
 188         vfst.next();
 189         found_it = true;
 190       }
 191     } else if (last_caller != nullptr &&
 192                last_caller->method_holder()->name() ==
 193                  vmSymbols::java_lang_ClassLoader() &&
 194                last_caller->name() == vmSymbols::loadClass_name()) {
 195       found_it = true;
 196     } else if (!vfst.at_end()) {
 197       if (vfst.method()->is_native()) {
 198         // JNI call
 199         found_it = true;
 200       }
 201     }
 202     if (found_it && !vfst.at_end()) {
 203       // found the caller
 204       caller = vfst.method()->method_holder();
 205       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 206       if (line_number == -1) {
 207         // show method name if it's a native method
 208         trace = vfst.method()->name_and_sig_as_C_string();
 209       }
 210       Symbol* s = caller->source_file_name();
 211       if (s != nullptr) {
 212         source_file = s->as_C_string();
 213       }
 214     }
 215   }
 216   if (caller != nullptr) {
 217     if (to_class != caller) {
 218       const char * from = caller->external_name();
 219       const char * to = to_class->external_name();
 220       // print in a single call to reduce interleaving between threads
 221       if (source_file != nullptr) {
 222         log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
 223       } else {
 224         log_debug(class, resolve)("%s %s (%s)", from, to, trace);
 225       }
 226     }
 227   }
 228 }
 229 
 230 // java.lang.System //////////////////////////////////////////////////////////////////////
 231 
 232 
 233 JVM_LEAF_PROF(jboolean, JVM_AOTIsTraining, JVM_AOTIsTraining(JNIEnv *env))
 234 #if INCLUDE_CDS
 235   return AOTMetaspace::is_recording_preimage_static_archive();
 236 #else
 237   return JNI_FALSE;
 238 #endif // INCLUDE_CDS
 239 JVM_END
 240 
 241 JVM_ENTRY_PROF(jboolean, JVM_AOTEndTraining, JVM_AOTEndTraining(JNIEnv *env))
 242 #if INCLUDE_CDS
 243   if (AOTMetaspace::is_recording_preimage_static_archive()) {
 244     AOTMetaspace::dump_static_archive(THREAD);
 245     return JNI_TRUE;
 246   }
 247   return JNI_FALSE;
 248 #else
 249   return JNI_FALSE;
 250 #endif // INCLUDE_CDS
 251 JVM_END
 252 
 253 JVM_ENTRY_PROF(jstring, JVM_AOTGetMode, JVM_AOTGetMode(JNIEnv *env))
 254   HandleMark hm(THREAD);
 255 #if INCLUDE_CDS
 256   const char* mode = AOTMode == nullptr ? "auto" : AOTMode;
 257   Handle h = java_lang_String::create_from_platform_dependent_str(mode, CHECK_NULL);
 258   return (jstring) JNIHandles::make_local(THREAD, h());
 259 #else
 260   return nullptr;
 261 #endif // INCLUDE_CDS
 262 JVM_END
 263 
 264 JVM_LEAF_PROF(jlong, JVM_AOTGetRecordingDuration, JVM_AOTGetRecordingDuration(JNIEnv *env))
 265 #if INCLUDE_CDS
 266   return AOTMetaspace::get_preimage_static_archive_recording_duration();
 267 #else
 268   return 0;
 269 #endif // INCLUDE_CDS
 270 JVM_END
 271 
 272 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 273   return os::javaTimeMillis();
 274 JVM_END
 275 
 276 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
 277   return os::javaTimeNanos();
 278 JVM_END
 279 
 280 // The function below is actually exposed by jdk.internal.misc.VM and not
 281 // java.lang.System, but we choose to keep it here so that it stays next
 282 // to JVM_CurrentTimeMillis and JVM_NanoTime
 283 
 284 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); //  2^32
 285 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
 286 
 287 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
 288   jlong seconds;
 289   jlong nanos;
 290 
 291   os::javaTimeSystemUTC(seconds, nanos);
 292 
 293   // We're going to verify that the result can fit in a long.
 294   // For that we need the difference in seconds between 'seconds'
 295   // and 'offset_secs' to be such that:
 296   //     |seconds - offset_secs| < (2^63/10^9)
 297   // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
 298   // which makes |seconds - offset_secs| < 2^33
 299   // and we will prefer +/- 2^32 as the maximum acceptable diff
 300   // as 2^32 has a more natural feel than 2^33...
 301   //
 302   // So if |seconds - offset_secs| >= 2^32 - we return a special
 303   // sentinel value (-1) which the caller should take as an
 304   // exception value indicating that the offset given to us is
 305   // too far from range of the current time - leading to too big
 306   // a nano adjustment. The caller is expected to recover by
 307   // computing a more accurate offset and calling this method
 308   // again. (For the record 2^32 secs is ~136 years, so that
 309   // should rarely happen)
 310   //
 311   jlong diff = seconds - offset_secs;
 312   if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
 313      return -1; // sentinel value: the offset is too far off the target
 314   }
 315 
 316   // return the adjustment. If you compute a time by adding
 317   // this number of nanoseconds along with the number of seconds
 318   // in the offset you should get the current UTC time.
 319   return (diff * (jlong)1000000000) + nanos;
 320 JVM_END
 321 
 322 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 323                                jobject dst, jint dst_pos, jint length))
 324   // Check if we have null pointers
 325   if (src == nullptr || dst == nullptr) {
 326     THROW(vmSymbols::java_lang_NullPointerException());
 327   }
 328   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 329   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 330   assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
 331   assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
 332   // Do copy
 333   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 334 JVM_END
 335 
 336 
 337 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 338   JavaValue r(T_OBJECT);
 339   // public synchronized Object put(Object key, Object value);
 340   HandleMark hm(THREAD);
 341   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 342   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
 343   JavaCalls::call_virtual(&r,
 344                           props,
 345                           vmClasses::Properties_klass(),
 346                           vmSymbols::put_name(),
 347                           vmSymbols::object_object_object_signature(),
 348                           key_str,
 349                           value_str,
 350                           THREAD);
 351 }
 352 
 353 
 354 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 355 
 356 /*
 357  * Return all of the system properties in a Java String array with alternating
 358  * names and values from the jvm SystemProperty.
 359  * Which includes some internal and all commandline -D defined properties.
 360  */
 361 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
 362   ResourceMark rm(THREAD);
 363   HandleMark hm(THREAD);
 364   int ndx = 0;
 365   int fixedCount = 2;
 366 
 367   SystemProperty* p = Arguments::system_properties();
 368   int count = Arguments::PropertyList_count(p);
 369 
 370   // Allocate result String array
 371   InstanceKlass* ik = vmClasses::String_klass();
 372   objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
 373   objArrayHandle result_h(THREAD, r);
 374 
 375   while (p != nullptr) {
 376     const char * key = p->key();
 377     if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
 378         const char * value = p->value();
 379         Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
 380         Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
 381         result_h->obj_at_put(ndx * 2,  key_str());
 382         result_h->obj_at_put(ndx * 2 + 1, value_str());
 383         ndx++;
 384     }
 385     p = p->next();
 386   }
 387 
 388   // Convert the -XX:MaxDirectMemorySize= command line flag
 389   // to the sun.nio.MaxDirectMemorySize property.
 390   // Do this after setting user properties to prevent people
 391   // from setting the value with a -D option, as requested.
 392   // Leave empty if not supplied
 393   if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 394     char as_chars[256];
 395     jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
 396     Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
 397     Handle value_str  = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
 398     result_h->obj_at_put(ndx * 2,  key_str());
 399     result_h->obj_at_put(ndx * 2 + 1, value_str());
 400     ndx++;
 401   }
 402 
 403   // JVM monitoring and management support
 404   // Add the sun.management.compiler property for the compiler's name
 405   {
 406 #undef CSIZE
 407 #if defined(_LP64)
 408   #define CSIZE "64-Bit "
 409 #else
 410   #define CSIZE
 411 #endif // 64bit
 412 
 413 #if COMPILER1_AND_COMPILER2
 414     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 415 #else
 416 #if defined(COMPILER1)
 417     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 418 #elif defined(COMPILER2)
 419     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 420 #elif INCLUDE_JVMCI
 421     #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2"
 422 #else
 423     const char* compiler_name = "";
 424 #endif // compilers
 425 #endif // COMPILER1_AND_COMPILER2
 426 
 427     if (*compiler_name != '\0' &&
 428         (Arguments::mode() != Arguments::_int)) {
 429       Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
 430       Handle value_str  = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
 431       result_h->obj_at_put(ndx * 2,  key_str());
 432       result_h->obj_at_put(ndx * 2 + 1, value_str());
 433       ndx++;
 434     }
 435   }
 436 
 437   return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
 438 JVM_END
 439 
 440 
 441 /*
 442  * Return the temporary directory that the VM uses for the attach
 443  * and perf data files.
 444  *
 445  * It is important that this directory is well-known and the
 446  * same for all VM instances. It cannot be affected by configuration
 447  * variables such as java.io.tmpdir.
 448  */
 449 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
 450   HandleMark hm(THREAD);
 451   const char* temp_dir = os::get_temp_directory();
 452   Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
 453   return (jstring) JNIHandles::make_local(THREAD, h());
 454 JVM_END
 455 
 456 
 457 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 458 
 459 extern volatile jint vm_created;
 460 
 461 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
 462   EventShutdown event;
 463   if (event.should_commit()) {
 464     event.set_reason("Shutdown requested from Java");
 465     event.commit();
 466   }
 467 JVM_END
 468 
 469 
 470 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
 471   before_exit(thread, true);
 472   vm_exit(code);
 473 JVM_END
 474 
 475 
 476 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
 477   if (!DisableExplicitGC) {
 478     EventSystemGC event;
 479     event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
 480     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 481     event.commit();
 482   }
 483 JVM_END
 484 
 485 
 486 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
 487   return Universe::heap()->millis_since_last_whole_heap_examined();
 488 JVM_END
 489 
 490 
 491 static inline jlong convert_size_t_to_jlong(size_t val) {
 492   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 493   NOT_LP64 (return (jlong)val;)
 494   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 495 }
 496 
 497 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
 498   size_t n = Universe::heap()->capacity();
 499   return convert_size_t_to_jlong(n);
 500 JVM_END
 501 
 502 
 503 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
 504   size_t n = Universe::heap()->unused();
 505   return convert_size_t_to_jlong(n);
 506 JVM_END
 507 
 508 
 509 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
 510   size_t n = Universe::heap()->max_capacity();
 511   return convert_size_t_to_jlong(n);
 512 JVM_END
 513 
 514 
 515 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
 516   return os::active_processor_count();
 517 JVM_END
 518 
 519 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
 520 #ifdef LINUX
 521   if (UseContainerSupport) {
 522     return JNI_TRUE;
 523   }
 524 #endif
 525   return JNI_FALSE;
 526 JVM_END
 527 
 528 JVM_LEAF(jboolean, JVM_IsContainerized(void))
 529 #ifdef LINUX
 530   if (OSContainer::is_containerized()) {
 531     return JNI_TRUE;
 532   }
 533 #endif
 534   return JNI_FALSE;
 535 JVM_END
 536 
 537 // java.lang.Throwable //////////////////////////////////////////////////////
 538 
 539 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
 540   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
 541   java_lang_Throwable::fill_in_stack_trace(exception);
 542 JVM_END
 543 
 544 // java.lang.NullPointerException ///////////////////////////////////////////
 545 
 546 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
 547   if (!ShowCodeDetailsInExceptionMessages) return nullptr;
 548 
 549   oop exc = JNIHandles::resolve_non_null(throwable);
 550 
 551   Method* method;
 552   int bci;
 553   if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
 554     return nullptr;
 555   }
 556   if (method->is_native()) {
 557     return nullptr;
 558   }
 559 
 560   stringStream ss;
 561   bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
 562   if (ok) {
 563     oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
 564     return (jstring) JNIHandles::make_local(THREAD, result);
 565   } else {
 566     return nullptr;
 567   }
 568 JVM_END
 569 
 570 // java.lang.StackTraceElement //////////////////////////////////////////////
 571 
 572 
 573 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
 574   Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
 575   objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
 576   objArrayHandle stack_trace(THREAD, st);
 577   // Fill in the allocated stack trace
 578   java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
 579 JVM_END
 580 
 581 
 582 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
 583   Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
 584   Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
 585   java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
 586 JVM_END
 587 
 588 
 589 // java.lang.StackWalker //////////////////////////////////////////////////////
 590 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
 591   Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
 592 
 593   bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
 594   bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
 595   Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
 596   if (!have_name) {
 597     oop name = StringTable::intern(method->name(), CHECK);
 598     java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
 599   }
 600   if (!have_type) {
 601     Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
 602     java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
 603   }
 604 JVM_END
 605 
 606 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
 607                                                          jint skip_frames, jobject contScope, jobject cont,
 608                                                          jint buffer_size, jint start_index, jobjectArray frames))
 609   if (!thread->has_last_Java_frame()) {
 610     THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
 611   }
 612 
 613   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 614   Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
 615   Handle cont_h(THREAD, JNIHandles::resolve(cont));
 616   // frames array is a ClassFrameInfo[] array when only getting caller reference,
 617   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 618   // be null.
 619   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 620   objArrayHandle frames_array_h(THREAD, fa);
 621 
 622   if (frames_array_h->length() < buffer_size) {
 623     THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
 624   }
 625 
 626   oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
 627                                buffer_size, start_index, frames_array_h, CHECK_NULL);
 628   return JNIHandles::make_local(THREAD, result);
 629 JVM_END
 630 
 631 
 632 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
 633                                                       jint last_batch_count, jint buffer_size, jint start_index,
 634                                                       jobjectArray frames))
 635   // frames array is a ClassFrameInfo[] array when only getting caller reference,
 636   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 637   // be null.
 638   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 639   objArrayHandle frames_array_h(THREAD, fa);
 640 
 641   if (frames_array_h->length() < buffer_size) {
 642     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
 643   }
 644 
 645   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 646   return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
 647                                   start_index, frames_array_h, THREAD);
 648 JVM_END
 649 
 650 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
 651   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 652   objArrayHandle frames_array_h(THREAD, fa);
 653   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 654   Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
 655 
 656   StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
 657 JVM_END
 658 
 659 // java.lang.Object ///////////////////////////////////////////////
 660 
 661 
 662 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
 663   // as implemented in the classic virtual machine; return 0 if object is null
 664   return handle == nullptr ? 0 :
 665          checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
 666 JVM_END
 667 
 668 
 669 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 670   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 671   ObjectSynchronizer::wait(obj, ms, CHECK);
 672 JVM_END
 673 
 674 
 675 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 676   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 677   ObjectSynchronizer::notify(obj, CHECK);
 678 JVM_END
 679 
 680 
 681 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 682   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 683   ObjectSynchronizer::notifyall(obj, CHECK);
 684 JVM_END
 685 
 686 
 687 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
 688   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 689   Klass* klass = obj->klass();
 690   JvmtiVMObjectAllocEventCollector oam;
 691 
 692 #ifdef ASSERT
 693   // Just checking that the cloneable flag is set correct
 694   if (obj->is_array()) {
 695     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 696   } else {
 697     guarantee(obj->is_instance(), "should be instanceOop");
 698     bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
 699     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 700   }
 701 #endif
 702 
 703   // Check if class of obj supports the Cloneable interface.
 704   // All arrays are considered to be cloneable (See JLS 20.1.5).
 705   // All j.l.r.Reference classes are considered non-cloneable.
 706   if (!klass->is_cloneable() ||
 707       (klass->is_instance_klass() &&
 708        InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
 709     ResourceMark rm(THREAD);
 710     THROW_MSG_NULL(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 711   }
 712 
 713   // Make shallow object copy
 714   const size_t size = obj->size();
 715   oop new_obj_oop = nullptr;
 716   if (obj->is_array()) {
 717     const int length = ((arrayOop)obj())->length();
 718     new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
 719                                                    /* do_zero */ true, CHECK_NULL);
 720   } else {
 721     new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
 722   }
 723 
 724   HeapAccess<>::clone(obj(), new_obj_oop, size);
 725 
 726   Handle new_obj(THREAD, new_obj_oop);
 727   // Caution: this involves a java upcall, so the clone should be
 728   // "gc-robust" by this stage.
 729   if (klass->has_finalizer()) {
 730     assert(obj->is_instance(), "should be instanceOop");
 731     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
 732     new_obj = Handle(THREAD, new_obj_oop);
 733   }
 734 
 735   return JNIHandles::make_local(THREAD, new_obj());
 736 JVM_END
 737 
 738 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
 739 
 740 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
 741   MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
 742 JVM_END
 743 
 744 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
 745   return InstanceKlass::is_finalization_enabled();
 746 JVM_END
 747 
 748 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
 749 
 750 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
 751   CONT_RegisterNativeMethods(env, cls);
 752 JVM_END
 753 
 754 // java.io.File ///////////////////////////////////////////////////////////////
 755 
 756 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
 757   return os::native_path(path);
 758 JVM_END
 759 
 760 
 761 // Misc. class handling ///////////////////////////////////////////////////////////
 762 
 763 
 764 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
 765   // Getting the class of the caller frame.
 766   //
 767   // The call stack at this point looks something like this:
 768   //
 769   // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
 770   // [1] [ @CallerSensitive API.method                                   ]
 771   // [.] [ (skipped intermediate frames)                                 ]
 772   // [n] [ caller                                                        ]
 773   vframeStream vfst(thread);
 774   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 775   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 776     Method* m = vfst.method();
 777     assert(m != nullptr, "sanity");
 778     switch (n) {
 779     case 0:
 780       // This must only be called from Reflection.getCallerClass
 781       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 782         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 783       }
 784       // fall-through
 785     case 1:
 786       // Frame 0 and 1 must be caller sensitive.
 787       if (!m->caller_sensitive()) {
 788         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 789       }
 790       break;
 791     default:
 792       if (!m->is_ignored_by_security_stack_walk()) {
 793         // We have reached the desired frame; return the holder class.
 794         return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
 795       }
 796       break;
 797     }
 798   }
 799   return nullptr;
 800 JVM_END
 801 
 802 
 803 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 804   oop mirror = nullptr;
 805   BasicType t = name2type(utf);
 806   if (t != T_ILLEGAL && !is_reference_type(t)) {
 807     mirror = Universe::java_mirror(t);
 808   }
 809   if (mirror == nullptr) {
 810     THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 811   } else {
 812     return (jclass) JNIHandles::make_local(THREAD, mirror);
 813   }
 814 JVM_END
 815 
 816 
 817 // Returns a class loaded by the bootstrap class loader; or null
 818 // if not found.  ClassNotFoundException is not thrown.
 819 // FindClassFromBootLoader is exported to the launcher for windows.
 820 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
 821   // Java libraries should ensure that name is never null or illegal.
 822   if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
 823     // It's impossible to create this class;  the name cannot fit
 824     // into the constant pool.
 825     return nullptr;
 826   }
 827   assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
 828 
 829   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 830   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 831   if (k == nullptr) {
 832     return nullptr;
 833   }
 834 
 835   if (log_is_enabled(Debug, class, resolve)) {
 836     trace_class_resolution(k);
 837   }
 838   return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
 839 JVM_END
 840 
 841 // Find a class with this name in this loader, using the caller's protection domain.
 842 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
 843                                                                    jboolean init, jobject loader,
 844                                                                    jclass caller))
 845   TempNewSymbol h_name =
 846        SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
 847                                            CHECK_NULL);
 848 
 849   oop loader_oop = JNIHandles::resolve(loader);
 850   oop from_class = JNIHandles::resolve(caller);
 851   Handle h_loader(THREAD, loader_oop);
 852 
 853   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 854                                                false, THREAD);
 855 
 856   if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
 857     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 858   }
 859   return result;
 860 JVM_END
 861 
 862 // Currently only called from the old verifier.
 863 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 864                                                                  jboolean init, jclass from))
 865   TempNewSymbol h_name =
 866        SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
 867                                            CHECK_NULL);
 868   oop from_class_oop = JNIHandles::resolve(from);
 869   Klass* from_class = (from_class_oop == nullptr)
 870                            ? (Klass*)nullptr
 871                            : java_lang_Class::as_Klass(from_class_oop);
 872   oop class_loader = nullptr;
 873   if (from_class != nullptr) {
 874     class_loader = from_class->class_loader();
 875   }
 876   Handle h_loader(THREAD, class_loader);
 877   jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
 878 
 879   if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
 880     // this function is generally only used for class loading during verification.
 881     ResourceMark rm;
 882     const char* from_name = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(from))->external_name();
 883     const char* to_name = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))->external_name();
 884     log_debug(class, resolve)("%s %s (verification)", from_name, to_name);
 885   }
 886 
 887 #if INCLUDE_CDS
 888   if (CDSConfig::is_preserving_verification_constraints() && from_class->is_instance_klass()) {
 889     InstanceKlass* ik = InstanceKlass::cast(from_class);
 890     SystemDictionaryShared::add_old_verification_constraint(THREAD, ik, h_name);
 891   }
 892 #endif
 893 
 894   return result;
 895 JVM_END
 896 
 897 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 898 static jclass jvm_define_class_common(const char *name,
 899                                       jobject loader, const jbyte *buf,
 900                                       jsize len, jobject pd, const char *source,
 901                                       TRAPS) {
 902   if (source == nullptr)  source = "__JVM_DefineClass__";
 903 
 904   JavaThread* jt = THREAD;
 905 
 906   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 907                              ClassLoader::perf_define_appclass_selftime(),
 908                              ClassLoader::perf_define_appclasses(),
 909                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 910                              jt->get_thread_stat()->perf_timers_addr(),
 911                              PerfClassTraceTime::DEFINE_CLASS);
 912 
 913   if (UsePerfData) {
 914     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 915   }
 916 
 917   // Class resolution will get the class name from the .class stream if the name is null.
 918   TempNewSymbol class_name = name == nullptr ? nullptr :
 919        SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
 920                                            CHECK_NULL);
 921 
 922   ResourceMark rm(THREAD);
 923   ClassFileStream st((u1*)buf, len, source);
 924   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 925   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 926   ClassLoadInfo cl_info(protection_domain);
 927   Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
 928                                                    class_loader,
 929                                                    cl_info,
 930                                                    CHECK_NULL);
 931 
 932   if (log_is_enabled(Debug, class, resolve)) {
 933     trace_class_resolution(k);
 934   }
 935 
 936   return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
 937 }
 938 
 939 enum {
 940   NESTMATE              = java_lang_invoke_MemberName::MN_NESTMATE_CLASS,
 941   HIDDEN_CLASS          = java_lang_invoke_MemberName::MN_HIDDEN_CLASS,
 942   STRONG_LOADER_LINK    = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK,
 943   ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS
 944 };
 945 
 946 /*
 947  * Define a class with the specified flags that indicates if it's a nestmate,
 948  * hidden, or strongly referenced from class loader.
 949  */
 950 static jclass jvm_lookup_define_class(jclass lookup, const char *name,
 951                                       const jbyte *buf, jsize len, jobject pd,
 952                                       jboolean init, int flags, jobject classData, TRAPS) {
 953   ResourceMark rm(THREAD);
 954 
 955   InstanceKlass* lookup_k = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(lookup));
 956   // Lookup class must not be a primitive class (whose mirror has a null Klass*)
 957   if (lookup_k == nullptr) {
 958     // The error message is wrong. We come here only if lookup is a primitive class
 959     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
 960   }
 961 
 962   Handle class_loader (THREAD, lookup_k->class_loader());
 963 
 964   bool is_nestmate = (flags & NESTMATE) == NESTMATE;
 965   bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS;
 966   bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK;
 967   bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS;
 968 
 969   InstanceKlass* host_class = nullptr;
 970   if (is_nestmate) {
 971     host_class = lookup_k->nest_host(CHECK_NULL);
 972   }
 973 
 974   log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s",
 975                              name,
 976                              is_nestmate ? "with dynamic nest-host " : "non-nestmate",
 977                              is_nestmate ? host_class->external_name() : "",
 978                              is_hidden ? "hidden" : "not hidden",
 979                              is_strong ? "strong" : "weak",
 980                              vm_annotations ? "with vm annotations" : "without vm annotation");
 981 
 982   if (!is_hidden) {
 983     // classData is only applicable for hidden classes
 984     if (classData != nullptr) {
 985       THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes");
 986     }
 987     if (is_nestmate) {
 988       THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes");
 989     }
 990     if (!is_strong) {
 991       THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader");
 992     }
 993     if (vm_annotations) {
 994       THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes");
 995     }
 996     if (flags != STRONG_LOADER_LINK) {
 997       THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
 998                      err_msg("invalid flag 0x%x", flags));
 999     }
1000   }
1001 
1002   // Class resolution will get the class name from the .class stream if the name is null.
1003   TempNewSymbol class_name = name == nullptr ? nullptr :
1004        SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
1005                                            CHECK_NULL);
1006 
1007   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1008   const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__";
1009   ClassFileStream st((u1*)buf, len, source);
1010 
1011   InstanceKlass* ik = nullptr;
1012   if (!is_hidden) {
1013     ClassLoadInfo cl_info(protection_domain);
1014     ik = SystemDictionary::resolve_from_stream(&st, class_name,
1015                                                class_loader,
1016                                                cl_info,
1017                                                CHECK_NULL);
1018 
1019     if (log_is_enabled(Debug, class, resolve)) {
1020       trace_class_resolution(ik);
1021     }
1022   } else { // hidden
1023     Handle classData_h(THREAD, JNIHandles::resolve(classData));
1024     ClassLoadInfo cl_info(protection_domain,
1025                           host_class,
1026                           classData_h,
1027                           is_hidden,
1028                           is_strong,
1029                           vm_annotations);
1030     ik = SystemDictionary::resolve_from_stream(&st, class_name,
1031                                                class_loader,
1032                                                cl_info,
1033                                                CHECK_NULL);
1034 
1035     // The hidden class loader data has been artificially been kept alive to
1036     // this point. The mirror and any instances of this class have to keep
1037     // it alive afterwards.
1038     ik->class_loader_data()->dec_keep_alive_ref_count();
1039 
1040     if (is_nestmate && log_is_enabled(Debug, class, nestmates)) {
1041       ModuleEntry* module = ik->module();
1042       const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE;
1043       log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s",
1044                                   module_name,
1045                                   ik->external_name(),
1046                                   host_class->external_name(),
1047                                   ik->is_hidden() ? "is hidden" : "is not hidden");
1048     }
1049   }
1050 
1051   if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1052     // non-hidden class or nestmate class must be in the same package as the Lookup class
1053     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1054   }
1055 
1056   if (init) {
1057     ik->initialize(CHECK_NULL);
1058   } else {
1059     ik->link_class(CHECK_NULL);
1060   }
1061 
1062   return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1063 }
1064 
1065 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1066   return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1067 JVM_END
1068 
1069 /*
1070  * Define a class with the specified lookup class.
1071  *  lookup:  Lookup class
1072  *  name:    the name of the class
1073  *  buf:     class bytes
1074  *  len:     length of class bytes
1075  *  pd:      protection domain
1076  *  init:    initialize the class
1077  *  flags:   properties of the class
1078  *  classData: private static pre-initialized field
1079  */
1080 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1081           jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1082 
1083   if (lookup == nullptr) {
1084     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1085   }
1086 
1087   assert(buf != nullptr, "buf must not be null");
1088 
1089   return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1090 JVM_END
1091 
1092 JVM_ENTRY_PROF(jclass, JVM_DefineClassWithSource, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1093   return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1094 JVM_END
1095 
1096 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1097   ResourceMark rm(THREAD);
1098 
1099   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1100   char* str = java_lang_String::as_utf8_string(h_name());
1101 
1102   // Sanity check, don't expect null
1103   if (str == nullptr) return nullptr;
1104 
1105   // Internalize the string, converting '.' to '/' in string.
1106   char* p = (char*)str;
1107   while (*p != '\0') {
1108     if (*p == '.') {
1109       *p = '/';
1110     }
1111     p++;
1112   }
1113 
1114   const int str_len = (int)(p - str);
1115   if (str_len > Symbol::max_length()) {
1116     // It's impossible to create this class;  the name cannot fit
1117     // into the constant pool.
1118     return nullptr;
1119   }
1120   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1121 
1122   // Security Note:
1123   //   The Java level wrapper will perform the necessary security check allowing
1124   //   us to pass the null as the initiating class loader.
1125   Handle h_loader(THREAD, JNIHandles::resolve(loader));
1126   Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1127 #if INCLUDE_CDS
1128   if (k == nullptr) {
1129     // If the class is not already loaded, try to see if it's in the shared
1130     // archive for the current classloader (h_loader).
1131     k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1132   }
1133 #endif
1134   return (k == nullptr) ? nullptr :
1135             (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1136 JVM_END
1137 
1138 // Module support //////////////////////////////////////////////////////////////////////////////
1139 
1140 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1141                                                    jstring location, jobjectArray packages))
1142   Handle h_module (THREAD, JNIHandles::resolve(module));
1143   Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1144 JVM_END
1145 
1146 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1147   Handle h_module (THREAD, JNIHandles::resolve(module));
1148   Modules::set_bootloader_unnamed_module(h_module, CHECK);
1149 JVM_END
1150 
1151 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1152   Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1153   Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1154   Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1155 JVM_END
1156 
1157 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1158   Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1159   Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1160 JVM_END
1161 
1162 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1163   Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1164   Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1165 JVM_END
1166 
1167 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1168   Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1169   Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1170   Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1171 JVM_END
1172 
1173 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1174   Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1175   Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1176   Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1177 JVM_END
1178 
1179 // Reflection support //////////////////////////////////////////////////////////////////////////////
1180 
1181 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1182   assert (cls != nullptr, "illegal class");
1183   JvmtiVMObjectAllocEventCollector oam;
1184   ResourceMark rm(THREAD);
1185   HandleMark hm(THREAD);
1186   Handle java_class(THREAD, JNIHandles::resolve(cls));
1187   oop result = java_lang_Class::name(java_class, CHECK_NULL);
1188   return (jstring) JNIHandles::make_local(THREAD, result);
1189 JVM_END
1190 
1191 
1192 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1193   JvmtiVMObjectAllocEventCollector oam;
1194   oop mirror = JNIHandles::resolve_non_null(cls);
1195 
1196   // Special handling for primitive objects
1197   if (java_lang_Class::is_primitive(mirror)) {
1198     // Primitive objects does not have any interfaces
1199     objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1200     return (jobjectArray) JNIHandles::make_local(THREAD, r);
1201   }
1202 
1203   Klass* klass = java_lang_Class::as_Klass(mirror);
1204   // Figure size of result array
1205   int size;
1206   if (klass->is_instance_klass()) {
1207     size = InstanceKlass::cast(klass)->local_interfaces()->length();
1208   } else {
1209     assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1210     size = 2;
1211   }
1212 
1213   // Allocate result array
1214   objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1215   objArrayHandle result (THREAD, r);
1216   // Fill in result
1217   if (klass->is_instance_klass()) {
1218     // Regular instance klass, fill in all local interfaces
1219     for (int index = 0; index < size; index++) {
1220       InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1221       result->obj_at_put(index, k->java_mirror());
1222     }
1223   } else {
1224     // All arrays implement java.lang.Cloneable and java.io.Serializable
1225     result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1226     result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1227   }
1228   return (jobjectArray) JNIHandles::make_local(THREAD, result());
1229 JVM_END
1230 
1231 
1232 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1233   oop mirror = JNIHandles::resolve_non_null(cls);
1234   if (java_lang_Class::is_primitive(mirror)) {
1235     return JNI_FALSE;
1236   }
1237   Klass* k = java_lang_Class::as_Klass(mirror);
1238   return k->is_hidden();
1239 JVM_END
1240 
1241 class ScopedValueBindingsResolver {
1242 public:
1243   InstanceKlass* Carrier_klass;
1244   ScopedValueBindingsResolver(JavaThread* THREAD) {
1245     Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1246     Carrier_klass = InstanceKlass::cast(k);
1247   }
1248 };
1249 
1250 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1251   ResourceMark rm(THREAD);
1252   GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1253   JvmtiVMObjectAllocEventCollector oam;
1254 
1255   static ScopedValueBindingsResolver resolver(THREAD);
1256 
1257   // Iterate through Java frames
1258   vframeStream vfst(thread);
1259   for(; !vfst.at_end(); vfst.next()) {
1260     int loc = -1;
1261     // get method of frame
1262     Method* method = vfst.method();
1263 
1264     Symbol *name = method->name();
1265 
1266     InstanceKlass* holder = method->method_holder();
1267     if (name == vmSymbols::runWith_method_name()) {
1268       if (holder == vmClasses::Thread_klass()
1269           || holder == resolver.Carrier_klass) {
1270         loc = 1;
1271       }
1272     }
1273 
1274     if (loc != -1) {
1275       javaVFrame *frame = vfst.asJavaVFrame();
1276       StackValueCollection* locals = frame->locals();
1277       StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1278       Handle result = head_sv->get_obj();
1279       assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1280       if (result() != nullptr) {
1281         return JNIHandles::make_local(THREAD, result());
1282       }
1283     }
1284   }
1285 
1286   return nullptr;
1287 JVM_END
1288 
1289 
1290 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1291   JvmtiVMObjectAllocEventCollector oam;
1292   // ofClass is a reference to a java_lang_Class object. The mirror object
1293   // of an InstanceKlass
1294   oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1295   if (java_lang_Class::is_primitive(ofMirror) ||
1296       ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1297     oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1298     return (jobjectArray)JNIHandles::make_local(THREAD, result);
1299   }
1300 
1301   InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1302   InnerClassesIterator iter(k);
1303 
1304   if (iter.length() == 0) {
1305     // Neither an inner nor outer class
1306     oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1307     return (jobjectArray)JNIHandles::make_local(THREAD, result);
1308   }
1309 
1310   // find inner class info
1311   constantPoolHandle cp(thread, k->constants());
1312   int length = iter.length();
1313 
1314   // Allocate temp. result array
1315   objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL);
1316   objArrayHandle result (THREAD, r);
1317   int members = 0;
1318 
1319   for (; !iter.done(); iter.next()) {
1320     int ioff = iter.inner_class_info_index();
1321     int ooff = iter.outer_class_info_index();
1322 
1323     if (ioff != 0 && ooff != 0) {
1324       // Check to see if the name matches the class we're looking for
1325       // before attempting to find the class.
1326       if (cp->klass_name_at_matches(k, ooff)) {
1327         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1328         if (outer_klass == k) {
1329            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1330            InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1331 
1332            // Throws an exception if outer klass has not declared k as
1333            // an inner klass
1334            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1335 
1336            result->obj_at_put(members, inner_klass->java_mirror());
1337            members++;
1338         }
1339       }
1340     }
1341   }
1342 
1343   if (members != length) {
1344     // Return array of right length
1345     objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1346     for(int i = 0; i < members; i++) {
1347       res->obj_at_put(i, result->obj_at(i));
1348     }
1349     return (jobjectArray)JNIHandles::make_local(THREAD, res);
1350   }
1351 
1352   return (jobjectArray)JNIHandles::make_local(THREAD, result());
1353 JVM_END
1354 
1355 
1356 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1357 {
1358   // ofClass is a reference to a java_lang_Class object.
1359   oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1360   if (java_lang_Class::is_primitive(ofMirror)) {
1361     return nullptr;
1362   }
1363   Klass* klass = java_lang_Class::as_Klass(ofMirror);
1364   if (!klass->is_instance_klass()) {
1365     return nullptr;
1366   }
1367 
1368   bool inner_is_member = false;
1369   Klass* outer_klass
1370     = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1371   if (outer_klass == nullptr)  return nullptr;  // already a top-level class
1372   if (!inner_is_member)  return nullptr;     // a hidden class (inside a method)
1373   return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1374 }
1375 JVM_END
1376 
1377 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1378 {
1379   oop mirror = JNIHandles::resolve_non_null(cls);
1380   if (java_lang_Class::is_primitive(mirror)) {
1381     return nullptr;
1382   }
1383   Klass* klass = java_lang_Class::as_Klass(mirror);
1384   if (!klass->is_instance_klass()) {
1385     return nullptr;
1386   }
1387   InstanceKlass* k = InstanceKlass::cast(klass);
1388   int ooff = 0, noff = 0;
1389   if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1390     if (noff != 0) {
1391       constantPoolHandle i_cp(thread, k->constants());
1392       Symbol* name = i_cp->symbol_at(noff);
1393       Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1394       return (jstring) JNIHandles::make_local(THREAD, str());
1395     }
1396   }
1397   return nullptr;
1398 }
1399 JVM_END
1400 
1401 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1402   assert (cls != nullptr, "illegal class");
1403   JvmtiVMObjectAllocEventCollector oam;
1404   ResourceMark rm(THREAD);
1405   oop mirror = JNIHandles::resolve_non_null(cls);
1406   // Return null for arrays and primitives
1407   if (!java_lang_Class::is_primitive(mirror)) {
1408     Klass* k = java_lang_Class::as_Klass(mirror);
1409     if (k->is_instance_klass()) {
1410       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1411       if (sym == nullptr) return nullptr;
1412       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1413       return (jstring) JNIHandles::make_local(THREAD, str());
1414     }
1415   }
1416   return nullptr;
1417 JVM_END
1418 
1419 
1420 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1421   assert (cls != nullptr, "illegal class");
1422   oop mirror = JNIHandles::resolve_non_null(cls);
1423   // Return null for arrays and primitives
1424   if (!java_lang_Class::is_primitive(mirror)) {
1425     Klass* k = java_lang_Class::as_Klass(mirror);
1426     if (k->is_instance_klass()) {
1427       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1428       return (jbyteArray) JNIHandles::make_local(THREAD, a);
1429     }
1430   }
1431   return nullptr;
1432 JVM_END
1433 
1434 
1435 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1436   // some of this code was adapted from from jni_FromReflectedField
1437 
1438   oop reflected = JNIHandles::resolve_non_null(field);
1439   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1440   int slot      = java_lang_reflect_Field::slot(reflected);
1441   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1442 
1443   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1444   int offset = ik->field_offset(slot);
1445 
1446   if (modifiers & JVM_ACC_STATIC) {
1447     // for static fields we only look in the current class
1448     if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1449       assert(false, "cannot find static field");
1450       return false;
1451     }
1452   } else {
1453     // for instance fields we start with the current class and work
1454     // our way up through the superclass chain
1455     if (!ik->find_field_from_offset(offset, false, &fd)) {
1456       assert(false, "cannot find instance field");
1457       return false;
1458     }
1459   }
1460   return true;
1461 }
1462 
1463 static Method* jvm_get_method_common(jobject method) {
1464   // some of this code was adapted from from jni_FromReflectedMethod
1465 
1466   oop reflected = JNIHandles::resolve_non_null(method);
1467   oop mirror    = nullptr;
1468   int slot      = 0;
1469 
1470   if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1471     mirror = java_lang_reflect_Constructor::clazz(reflected);
1472     slot   = java_lang_reflect_Constructor::slot(reflected);
1473   } else {
1474     assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1475            "wrong type");
1476     mirror = java_lang_reflect_Method::clazz(reflected);
1477     slot   = java_lang_reflect_Method::slot(reflected);
1478   }
1479   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1480 
1481   Method* m = ik->method_with_idnum(slot);
1482   assert(m != nullptr, "cannot find method");
1483   return m;  // caller has to deal with null in product mode
1484 }
1485 
1486 /* Type use annotations support (JDK 1.8) */
1487 
1488 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1489   assert (cls != nullptr, "illegal class");
1490   ResourceMark rm(THREAD);
1491   // Return null for arrays and primitives
1492   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1493     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1494     if (k->is_instance_klass()) {
1495       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1496       if (type_annotations != nullptr) {
1497         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1498         return (jbyteArray) JNIHandles::make_local(THREAD, a);
1499       }
1500     }
1501   }
1502   return nullptr;
1503 JVM_END
1504 
1505 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1506   assert (method != nullptr, "illegal method");
1507   // method is a handle to a java.lang.reflect.Method object
1508   Method* m = jvm_get_method_common(method);
1509   if (m == nullptr) {
1510     return nullptr;
1511   }
1512 
1513   AnnotationArray* type_annotations = m->type_annotations();
1514   if (type_annotations != nullptr) {
1515     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1516     return (jbyteArray) JNIHandles::make_local(THREAD, a);
1517   }
1518 
1519   return nullptr;
1520 JVM_END
1521 
1522 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1523   assert (field != nullptr, "illegal field");
1524   fieldDescriptor fd;
1525   bool gotFd = jvm_get_field_common(field, fd);
1526   if (!gotFd) {
1527     return nullptr;
1528   }
1529 
1530   return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1531 JVM_END
1532 
1533 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1534   if (!cp->is_within_bounds(index)) {
1535     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1536   }
1537 }
1538 
1539 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1540 {
1541   // method is a handle to a java.lang.reflect.Method object
1542   Method* method_ptr = jvm_get_method_common(method);
1543   methodHandle mh (THREAD, method_ptr);
1544   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1545   const int num_params = mh->method_parameters_length();
1546 
1547   if (num_params < 0) {
1548     // A -1 return value from method_parameters_length means there is no
1549     // parameter data.  Return null to indicate this to the reflection
1550     // API.
1551     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1552     return (jobjectArray)nullptr;
1553   } else {
1554     // Otherwise, we return something up to reflection, even if it is
1555     // a zero-length array.  Why?  Because in some cases this can
1556     // trigger a MalformedParametersException.
1557 
1558     // make sure all the symbols are properly formatted
1559     for (int i = 0; i < num_params; i++) {
1560       MethodParametersElement* params = mh->method_parameters_start();
1561       int index = params[i].name_cp_index;
1562       constantPoolHandle cp(THREAD, mh->constants());
1563       bounds_check(cp, index, CHECK_NULL);
1564 
1565       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1566         THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1567                        "Wrong type at constant pool index");
1568       }
1569 
1570     }
1571 
1572     objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1573     objArrayHandle result (THREAD, result_oop);
1574 
1575     for (int i = 0; i < num_params; i++) {
1576       MethodParametersElement* params = mh->method_parameters_start();
1577       // For a 0 index, give a null symbol
1578       Symbol* sym = 0 != params[i].name_cp_index ?
1579         mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1580       int flags = params[i].flags;
1581       oop param = Reflection::new_parameter(reflected_method, i, sym,
1582                                             flags, CHECK_NULL);
1583       result->obj_at_put(i, param);
1584     }
1585     return (jobjectArray)JNIHandles::make_local(THREAD, result());
1586   }
1587 }
1588 JVM_END
1589 
1590 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1591 
1592 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1593 {
1594   JvmtiVMObjectAllocEventCollector oam;
1595 
1596   oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1597   // Exclude primitive types and array types
1598   if (java_lang_Class::is_primitive(ofMirror) ||
1599       java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1600     // Return empty array
1601     oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1602     return (jobjectArray) JNIHandles::make_local(THREAD, res);
1603   }
1604 
1605   InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1606   constantPoolHandle cp(THREAD, k->constants());
1607 
1608   // Ensure class is linked
1609   k->link_class(CHECK_NULL);
1610 
1611   // Allocate result
1612   int num_fields;
1613 
1614   if (publicOnly) {
1615     num_fields = 0;
1616     for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1617       if (fs.access_flags().is_public()) ++num_fields;
1618     }
1619   } else {
1620     num_fields = k->java_fields_count();
1621   }
1622 
1623   objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1624   objArrayHandle result (THREAD, r);
1625 
1626   int out_idx = 0;
1627   fieldDescriptor fd;
1628   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1629     if (!publicOnly || fs.access_flags().is_public()) {
1630       fd.reinitialize(k, fs.to_FieldInfo());
1631       oop field = Reflection::new_field(&fd, CHECK_NULL);
1632       result->obj_at_put(out_idx, field);
1633       ++out_idx;
1634     }
1635   }
1636   assert(out_idx == num_fields, "just checking");
1637   return (jobjectArray) JNIHandles::make_local(THREAD, result());
1638 }
1639 JVM_END
1640 
1641 // A class is a record if and only if it is final and a direct subclass of
1642 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1643 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1644 {
1645   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1646   if (k != nullptr && k->is_instance_klass()) {
1647     InstanceKlass* ik = InstanceKlass::cast(k);
1648     return ik->is_record();
1649   } else {
1650     return false;
1651   }
1652 }
1653 JVM_END
1654 
1655 // Returns an array containing the components of the Record attribute,
1656 // or null if the attribute is not present.
1657 //
1658 // Note that this function returns the components of the Record attribute
1659 // even if the class is not a record.
1660 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1661 {
1662   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(ofClass));
1663 
1664   Array<RecordComponent*>* components = ik->record_components();
1665   if (components != nullptr) {
1666     JvmtiVMObjectAllocEventCollector oam;
1667     constantPoolHandle cp(THREAD, ik->constants());
1668     int length = components->length();
1669     assert(length >= 0, "unexpected record_components length");
1670     objArrayOop record_components =
1671       oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1672     objArrayHandle components_h (THREAD, record_components);
1673 
1674     for (int x = 0; x < length; x++) {
1675       RecordComponent* component = components->at(x);
1676       assert(component != nullptr, "unexpected null record component");
1677       oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1678       components_h->obj_at_put(x, component_oop);
1679     }
1680     return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1681   }
1682 
1683   return nullptr;
1684 }
1685 JVM_END
1686 
1687 static jobjectArray get_class_declared_methods_helper(
1688                                   JNIEnv *env,
1689                                   jclass ofClass, jboolean publicOnly,
1690                                   bool want_constructor,
1691                                   Klass* klass, TRAPS) {
1692 
1693   JvmtiVMObjectAllocEventCollector oam;
1694 
1695   oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1696   // Exclude primitive types and array types
1697   if (java_lang_Class::is_primitive(ofMirror)
1698       || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1699     // Return empty array
1700     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1701     return (jobjectArray) JNIHandles::make_local(THREAD, res);
1702   }
1703 
1704   InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1705 
1706   // Ensure class is linked
1707   k->link_class(CHECK_NULL);
1708 
1709   Array<Method*>* methods = k->methods();
1710   int methods_length = methods->length();
1711 
1712   // Save original method_idnum in case of redefinition, which can change
1713   // the idnum of obsolete methods.  The new method will have the same idnum
1714   // but if we refresh the methods array, the counts will be wrong.
1715   ResourceMark rm(THREAD);
1716   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1717   int num_methods = 0;
1718 
1719   // Select methods matching the criteria.
1720   for (int i = 0; i < methods_length; i++) {
1721     Method* method = methods->at(i);
1722     if (want_constructor && !method->is_object_initializer()) {
1723       continue;
1724     }
1725     if (!want_constructor &&
1726         (method->is_object_initializer() || method->is_static_initializer() ||
1727          method->is_overpass())) {
1728       continue;
1729     }
1730     if (publicOnly && !method->is_public()) {
1731       continue;
1732     }
1733     idnums->push(method->method_idnum());
1734     ++num_methods;
1735   }
1736 
1737   // Allocate result
1738   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1739   objArrayHandle result (THREAD, r);
1740 
1741   // Now just put the methods that we selected above, but go by their idnum
1742   // in case of redefinition.  The methods can be redefined at any safepoint,
1743   // so above when allocating the oop array and below when creating reflect
1744   // objects.
1745   for (int i = 0; i < num_methods; i++) {
1746     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1747     if (method.is_null()) {
1748       // Method may have been deleted and seems this API can handle null
1749       // Otherwise should probably put a method that throws NSME
1750       result->obj_at_put(i, nullptr);
1751     } else {
1752       oop m;
1753       if (want_constructor) {
1754         m = Reflection::new_constructor(method, CHECK_NULL);
1755       } else {
1756         m = Reflection::new_method(method, false, CHECK_NULL);
1757       }
1758       result->obj_at_put(i, m);
1759     }
1760   }
1761 
1762   return (jobjectArray) JNIHandles::make_local(THREAD, result());
1763 }
1764 
1765 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1766 {
1767   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1768                                            /*want_constructor*/ false,
1769                                            vmClasses::reflect_Method_klass(), THREAD);
1770 }
1771 JVM_END
1772 
1773 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1774 {
1775   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1776                                            /*want_constructor*/ true,
1777                                            vmClasses::reflect_Constructor_klass(), THREAD);
1778 }
1779 JVM_END
1780 
1781 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1782 {
1783   InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1784   InstanceKlass* m = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(member));
1785   return c->has_nestmate_access_to(m, THREAD);
1786 }
1787 JVM_END
1788 
1789 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1790 {
1791   // current is not a primitive or array class
1792   InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1793   InstanceKlass* host = c->nest_host(THREAD);
1794   return (jclass) (host == nullptr ? nullptr :
1795                    JNIHandles::make_local(THREAD, host->java_mirror()));
1796 }
1797 JVM_END
1798 
1799 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1800 {
1801   // current is not a primitive or array class
1802   ResourceMark rm(THREAD);
1803   InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1804   InstanceKlass* host = c->nest_host(THREAD);
1805 
1806   log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1807                               c->external_name(), host->external_name());
1808   {
1809     JvmtiVMObjectAllocEventCollector oam;
1810     Array<u2>* members = host->nest_members();
1811     int length = members == nullptr ? 0 : members->length();
1812 
1813     log_trace(class, nestmates)(" - host has %d listed nest members", length);
1814 
1815     // nest host is first in the array so make it one bigger
1816     objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1817                                              length + 1, CHECK_NULL);
1818     objArrayHandle result(THREAD, r);
1819     result->obj_at_put(0, host->java_mirror());
1820     if (length != 0) {
1821       int count = 0;
1822       for (int i = 0; i < length; i++) {
1823         int cp_index = members->at(i);
1824         Klass* k = host->constants()->klass_at(cp_index, THREAD);
1825         if (HAS_PENDING_EXCEPTION) {
1826           if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1827             return nullptr; // propagate VMEs
1828           }
1829           if (log_is_enabled(Trace, class, nestmates)) {
1830             stringStream ss;
1831             char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string();
1832             ss.print(" - resolution of nest member %s failed: ", target_member_class);
1833             java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1834             log_trace(class, nestmates)("%s", ss.as_string());
1835           }
1836           CLEAR_PENDING_EXCEPTION;
1837           continue;
1838         }
1839         if (k->is_instance_klass()) {
1840           InstanceKlass* ik = InstanceKlass::cast(k);
1841           InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL);
1842           if (nest_host_k == host) {
1843             result->obj_at_put(count+1, k->java_mirror());
1844             count++;
1845             log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name());
1846           } else {
1847             log_trace(class, nestmates)(" - skipping member %s with different host %s",
1848                                         ik->external_name(), nest_host_k->external_name());
1849           }
1850         } else {
1851           log_trace(class, nestmates)(" - skipping member %s that is not an instance class",
1852                                       k->external_name());
1853         }
1854       }
1855       if (count < length) {
1856         // we had invalid entries so we need to compact the array
1857         log_trace(class, nestmates)(" - compacting array from length %d to %d",
1858                                     length + 1, count + 1);
1859 
1860         objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1861                                                   count + 1, CHECK_NULL);
1862         objArrayHandle result2(THREAD, r2);
1863         for (int i = 0; i < count + 1; i++) {
1864           result2->obj_at_put(i, result->obj_at(i));
1865         }
1866         return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1867       }
1868     }
1869     else {
1870       assert(host == c || c->is_hidden(), "must be singleton nest or dynamic nestmate");
1871     }
1872     return (jobjectArray)JNIHandles::make_local(THREAD, result());
1873   }
1874 }
1875 JVM_END
1876 
1877 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1878 {
1879   oop mirror = JNIHandles::resolve_non_null(current);
1880   assert(!java_lang_Class::is_primitive(mirror), "should not be");
1881   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1882 
1883   ResourceMark rm(THREAD);
1884   log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1885                            ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1886   if (ik->is_sealed()) {
1887     JvmtiVMObjectAllocEventCollector oam;
1888     Array<u2>* subclasses = ik->permitted_subclasses();
1889     int length = subclasses->length();
1890 
1891     log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1892 
1893     objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1894                                              length, CHECK_NULL);
1895     objArrayHandle result(THREAD, r);
1896     int count = 0;
1897     for (int i = 0; i < length; i++) {
1898       int cp_index = subclasses->at(i);
1899       Klass* k = ik->constants()->klass_at(cp_index, THREAD);
1900       if (HAS_PENDING_EXCEPTION) {
1901         if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1902           return nullptr; // propagate VMEs
1903         }
1904         if (log_is_enabled(Trace, class, sealed)) {
1905           stringStream ss;
1906           char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string();
1907           ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass);
1908           java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1909           log_trace(class, sealed)("%s", ss.as_string());
1910         }
1911 
1912         CLEAR_PENDING_EXCEPTION;
1913         continue;
1914       }
1915       if (k->is_instance_klass()) {
1916         result->obj_at_put(count++, k->java_mirror());
1917         log_trace(class, sealed)(" - [%d] = %s", count, k->external_name());
1918       }
1919     }
1920     if (count < length) {
1921       // we had invalid entries so we need to compact the array
1922       objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1923                                                 count, CHECK_NULL);
1924       objArrayHandle result2(THREAD, r2);
1925       for (int i = 0; i < count; i++) {
1926         result2->obj_at_put(i, result->obj_at(i));
1927       }
1928       return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1929     }
1930     return (jobjectArray)JNIHandles::make_local(THREAD, result());
1931   } else {
1932     return nullptr;
1933   }
1934 }
1935 JVM_END
1936 
1937 // Constant pool access //////////////////////////////////////////////////////////
1938 
1939 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1940 {
1941   JvmtiVMObjectAllocEventCollector oam;
1942   oop mirror = JNIHandles::resolve_non_null(cls);
1943   // Return null for primitives and arrays
1944   if (!java_lang_Class::is_primitive(mirror)) {
1945     Klass* k = java_lang_Class::as_Klass(mirror);
1946     if (k->is_instance_klass()) {
1947       InstanceKlass* k_h = InstanceKlass::cast(k);
1948       Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1949       reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1950       return JNIHandles::make_local(THREAD, jcp());
1951     }
1952   }
1953   return nullptr;
1954 }
1955 JVM_END
1956 
1957 
1958 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj))
1959 {
1960   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1961   return cp->length();
1962 }
1963 JVM_END
1964 
1965 
1966 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jint index))
1967 {
1968   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1969   bounds_check(cp, index, CHECK_NULL);
1970   constantTag tag = cp->tag_at(index);
1971   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1972     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1973   }
1974   Klass* k = cp->klass_at(index, CHECK_NULL);
1975   return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1976 }
1977 JVM_END
1978 
1979 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1980 {
1981   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1982   bounds_check(cp, index, CHECK_NULL);
1983   constantTag tag = cp->tag_at(index);
1984   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1985     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1986   }
1987   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1988   if (k == nullptr) return nullptr;
1989   return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1990 }
1991 JVM_END
1992 
1993 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1994   constantTag tag = cp->tag_at(index);
1995   if (!tag.is_method() && !tag.is_interface_method()) {
1996     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1997   }
1998   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1999   Klass* k_o;
2000   if (force_resolution) {
2001     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2002   } else {
2003     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2004     if (k_o == nullptr) return nullptr;
2005   }
2006   InstanceKlass* k = InstanceKlass::cast(k_o);
2007   Symbol* name = cp->uncached_name_ref_at(index);
2008   Symbol* sig  = cp->uncached_signature_ref_at(index);
2009   methodHandle m (THREAD, k->find_method(name, sig));
2010   if (m.is_null()) {
2011     THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2012   }
2013   oop method;
2014   if (m->is_object_initializer()) {
2015     method = Reflection::new_constructor(m, CHECK_NULL);
2016   } else {
2017     // new_method accepts <clinit> as Method here
2018     method = Reflection::new_method(m, true, CHECK_NULL);
2019   }
2020   return JNIHandles::make_local(THREAD, method);
2021 }
2022 
2023 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
2024 {
2025   JvmtiVMObjectAllocEventCollector oam;
2026   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2027   bounds_check(cp, index, CHECK_NULL);
2028   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2029   return res;
2030 }
2031 JVM_END
2032 
2033 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2034 {
2035   JvmtiVMObjectAllocEventCollector oam;
2036   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2037   bounds_check(cp, index, CHECK_NULL);
2038   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2039   return res;
2040 }
2041 JVM_END
2042 
2043 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2044   constantTag tag = cp->tag_at(index);
2045   if (!tag.is_field()) {
2046     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2047   }
2048   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2049   Klass* k_o;
2050   if (force_resolution) {
2051     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2052   } else {
2053     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2054     if (k_o == nullptr) return nullptr;
2055   }
2056   InstanceKlass* k = InstanceKlass::cast(k_o);
2057   Symbol* name = cp->uncached_name_ref_at(index);
2058   Symbol* sig  = cp->uncached_signature_ref_at(index);
2059   fieldDescriptor fd;
2060   Klass* target_klass = k->find_field(name, sig, &fd);
2061   if (target_klass == nullptr) {
2062     THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2063   }
2064   oop field = Reflection::new_field(&fd, CHECK_NULL);
2065   return JNIHandles::make_local(THREAD, field);
2066 }
2067 
2068 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jint index))
2069 {
2070   JvmtiVMObjectAllocEventCollector oam;
2071   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2072   bounds_check(cp, index, CHECK_NULL);
2073   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2074   return res;
2075 }
2076 JVM_END
2077 
2078 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2079 {
2080   JvmtiVMObjectAllocEventCollector oam;
2081   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2082   bounds_check(cp, index, CHECK_NULL);
2083   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2084   return res;
2085 }
2086 JVM_END
2087 
2088 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jint index))
2089 {
2090   JvmtiVMObjectAllocEventCollector oam;
2091   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2092   bounds_check(cp, index, CHECK_NULL);
2093   constantTag tag = cp->tag_at(index);
2094   if (!tag.is_field_or_method()) {
2095     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2096   }
2097   int klass_ref = cp->uncached_klass_ref_index_at(index);
2098   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2099   Symbol*  member_name = cp->uncached_name_ref_at(index);
2100   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2101   objArrayOop  dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2102   objArrayHandle dest(THREAD, dest_o);
2103   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2104   dest->obj_at_put(0, str());
2105   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2106   dest->obj_at_put(1, str());
2107   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2108   dest->obj_at_put(2, str());
2109   return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2110 }
2111 JVM_END
2112 
2113 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jint index))
2114 {
2115   JvmtiVMObjectAllocEventCollector oam;
2116   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2117   bounds_check(cp, index, CHECK_0);
2118   constantTag tag = cp->tag_at(index);
2119   if (!tag.is_field_or_method()) {
2120     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2121   }
2122   return (jint) cp->uncached_klass_ref_index_at(index);
2123 }
2124 JVM_END
2125 
2126 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jint index))
2127 {
2128   JvmtiVMObjectAllocEventCollector oam;
2129   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2130   bounds_check(cp, index, CHECK_0);
2131   constantTag tag = cp->tag_at(index);
2132   if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2133     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2134   }
2135   return (jint) cp->uncached_name_and_type_ref_index_at(index);
2136 }
2137 JVM_END
2138 
2139 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jint index))
2140 {
2141   JvmtiVMObjectAllocEventCollector oam;
2142   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2143   bounds_check(cp, index, CHECK_NULL);
2144   constantTag tag = cp->tag_at(index);
2145   if (!tag.is_name_and_type()) {
2146     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2147   }
2148   Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2149   Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2150   objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2151   objArrayHandle dest(THREAD, dest_o);
2152   Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2153   dest->obj_at_put(0, str());
2154   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2155   dest->obj_at_put(1, str());
2156   return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2157 }
2158 JVM_END
2159 
2160 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jint index))
2161 {
2162   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2163   bounds_check(cp, index, CHECK_0);
2164   constantTag tag = cp->tag_at(index);
2165   if (!tag.is_int()) {
2166     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2167   }
2168   return cp->int_at(index);
2169 }
2170 JVM_END
2171 
2172 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jint index))
2173 {
2174   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2175   bounds_check(cp, index, CHECK_(0L));
2176   constantTag tag = cp->tag_at(index);
2177   if (!tag.is_long()) {
2178     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2179   }
2180   return cp->long_at(index);
2181 }
2182 JVM_END
2183 
2184 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jint index))
2185 {
2186   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2187   bounds_check(cp, index, CHECK_(0.0f));
2188   constantTag tag = cp->tag_at(index);
2189   if (!tag.is_float()) {
2190     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2191   }
2192   return cp->float_at(index);
2193 }
2194 JVM_END
2195 
2196 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jint index))
2197 {
2198   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2199   bounds_check(cp, index, CHECK_(0.0));
2200   constantTag tag = cp->tag_at(index);
2201   if (!tag.is_double()) {
2202     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2203   }
2204   return cp->double_at(index);
2205 }
2206 JVM_END
2207 
2208 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jint index))
2209 {
2210   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2211   bounds_check(cp, index, CHECK_NULL);
2212   constantTag tag = cp->tag_at(index);
2213   if (!tag.is_string()) {
2214     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2215   }
2216   oop str = cp->string_at(index, CHECK_NULL);
2217   return (jstring) JNIHandles::make_local(THREAD, str);
2218 }
2219 JVM_END
2220 
2221 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jint index))
2222 {
2223   JvmtiVMObjectAllocEventCollector oam;
2224   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2225   bounds_check(cp, index, CHECK_NULL);
2226   constantTag tag = cp->tag_at(index);
2227   if (!tag.is_symbol()) {
2228     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2229   }
2230   Symbol* sym = cp->symbol_at(index);
2231   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2232   return (jstring) JNIHandles::make_local(THREAD, str());
2233 }
2234 JVM_END
2235 
2236 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jint index))
2237 {
2238   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2239   bounds_check(cp, index, CHECK_0);
2240   constantTag tag = cp->tag_at(index);
2241   jbyte result = tag.value();
2242   // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2243   // they are changed to the corresponding tags from the JVM spec, so that java code in
2244   // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2245   if (tag.is_klass_or_reference()) {
2246       result = JVM_CONSTANT_Class;
2247   } else if (tag.is_string_index()) {
2248       result = JVM_CONSTANT_String;
2249   } else if (tag.is_method_type_in_error()) {
2250       result = JVM_CONSTANT_MethodType;
2251   } else if (tag.is_method_handle_in_error()) {
2252       result = JVM_CONSTANT_MethodHandle;
2253   } else if (tag.is_dynamic_constant_in_error()) {
2254       result = JVM_CONSTANT_Dynamic;
2255   }
2256   return result;
2257 }
2258 JVM_END
2259 
2260 // Assertion support. //////////////////////////////////////////////////////////
2261 
2262 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2263   assert(cls != nullptr, "bad class");
2264 
2265   oop r = JNIHandles::resolve(cls);
2266   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2267   if (java_lang_Class::is_primitive(r)) return false;
2268 
2269   Klass* k = java_lang_Class::as_Klass(r);
2270   assert(k->is_instance_klass(), "must be an instance klass");
2271   if (!k->is_instance_klass()) return false;
2272 
2273   ResourceMark rm(THREAD);
2274   const char* name = k->name()->as_C_string();
2275   bool system_class = k->class_loader() == nullptr;
2276   return JavaAssertions::enabled(name, system_class);
2277 
2278 JVM_END
2279 
2280 
2281 // Return a new AssertionStatusDirectives object with the fields filled in with
2282 // command-line assertion arguments (i.e., -ea, -da).
2283 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2284   JvmtiVMObjectAllocEventCollector oam;
2285   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2286   return JNIHandles::make_local(THREAD, asd);
2287 JVM_END
2288 
2289 // Verification ////////////////////////////////////////////////////////////////////////////////
2290 
2291 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2292 
2293 // RedefineClasses support: bug 6214132 caused verification to fail.
2294 // All functions from this section, unless noted otherwise, should call the functions
2295 //   get_klass_considering_redefinition(), or
2296 //   get_instance_klass_considering_redefinition()
2297 // These functions return JvmtiThreadState::_scratch_class if the verifier
2298 // was invoked in the middle of the redefinition of cls.
2299 // See jvmtiThreadState.hpp for details.
2300 
2301 inline Klass* get_klass_considering_redefinition(jclass cls, JavaThread* thread) {
2302   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2303   if (k->is_instance_klass()) {
2304     return JvmtiThreadState::class_to_verify_considering_redefinition(InstanceKlass::cast(k), thread);
2305   } else {
2306     return k;
2307   }
2308 }
2309 
2310 inline InstanceKlass* get_instance_klass_considering_redefinition(jclass cls, JavaThread* thread) {
2311   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(cls));
2312   return JvmtiThreadState::class_to_verify_considering_redefinition(ik, thread);
2313 }
2314 
2315 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
2316   oop mirror = JNIHandles::resolve_non_null(cls);
2317   if (java_lang_Class::is_primitive(mirror)) {
2318     return JNI_FALSE;
2319   }
2320   Klass* k = java_lang_Class::as_Klass(mirror);
2321   // This isn't necessary since answer is the same because redefinition
2322   // has already checked this matches for the scratch class.
2323   // k = get_klass_considering_redefinition(cls, thread)
2324   jboolean result = k->is_interface();
2325   assert(!result || k->is_instance_klass(),
2326          "all interfaces are instance types");
2327   return result;
2328 JVM_END
2329 
2330 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2331   // No need to call get_klass_considering_redefinition() as redefinition cannot change a class's name.
2332   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2333   return k->name()->as_utf8();
2334 JVM_END
2335 
2336 
2337 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2338   Klass* k = get_klass_considering_redefinition(cls, thread);
2339   // types will have length zero if this is not an InstanceKlass
2340   // (length is determined by call to JVM_GetClassCPEntriesCount)
2341   if (k->is_instance_klass()) {
2342     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2343     for (int index = cp->length() - 1; index >= 0; index--) {
2344       constantTag tag = cp->tag_at(index);
2345       types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2346     }
2347   }
2348 JVM_END
2349 
2350 
2351 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2352   Klass* k = get_klass_considering_redefinition(cls, thread);
2353   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2354 JVM_END
2355 
2356 
2357 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2358   Klass* k = get_klass_considering_redefinition(cls, thread);
2359   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2360 JVM_END
2361 
2362 
2363 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2364   Klass* k = get_klass_considering_redefinition(cls, thread);
2365   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2366 JVM_END
2367 
2368 
2369 // The following methods, used for the verifier, are never called with
2370 // array klasses, so a direct cast to InstanceKlass is safe.
2371 // Typically, these methods are called in a loop with bounds determined
2372 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2373 // zero for arrays.
2374 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2375   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2376   Method* method = ik->methods()->at(method_index);
2377   int length = method->checked_exceptions_length();
2378   if (length > 0) {
2379     CheckedExceptionElement* table= method->checked_exceptions_start();
2380     for (int i = 0; i < length; i++) {
2381       exceptions[i] = table[i].class_cp_index;
2382     }
2383   }
2384 JVM_END
2385 
2386 
2387 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2388   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2389   Method* method = ik->methods()->at(method_index);
2390   return method->checked_exceptions_length();
2391 JVM_END
2392 
2393 
2394 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2395   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2396   Method* method = ik->methods()->at(method_index);
2397   memcpy(code, method->code_base(), method->code_size());
2398 JVM_END
2399 
2400 
2401 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2402   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2403   Method* method = ik->methods()->at(method_index);
2404   return method->code_size();
2405 JVM_END
2406 
2407 
2408 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2409   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2410   Method* method = ik->methods()->at(method_index);
2411   ExceptionTable extable(method);
2412   entry->start_pc   = extable.start_pc(entry_index);
2413   entry->end_pc     = extable.end_pc(entry_index);
2414   entry->handler_pc = extable.handler_pc(entry_index);
2415   entry->catchType  = extable.catch_type_index(entry_index);
2416 JVM_END
2417 
2418 
2419 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2420   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2421   Method* method = ik->methods()->at(method_index);
2422   return method->exception_table_length();
2423 JVM_END
2424 
2425 
2426 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2427   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2428   Method* method = ik->methods()->at(method_index);
2429   return method->access_flags().as_method_flags();
2430 JVM_END
2431 
2432 
2433 
2434 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2435   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2436   return ik->field_access_flags(field_index);
2437 JVM_END
2438 
2439 
2440 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2441   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2442   Method* method = ik->methods()->at(method_index);
2443   return method->max_locals();
2444 JVM_END
2445 
2446 
2447 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2448   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2449   Method* method = ik->methods()->at(method_index);
2450   return method->size_of_parameters();
2451 JVM_END
2452 
2453 
2454 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2455   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2456   Method* method = ik->methods()->at(method_index);
2457   return method->verifier_max_stack();
2458 JVM_END
2459 
2460 
2461 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2462   ResourceMark rm(THREAD);
2463   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2464   Method* method = ik->methods()->at(method_index);
2465   return method->name() == vmSymbols::object_initializer_name();
2466 JVM_END
2467 
2468 
2469 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2470   ResourceMark rm(THREAD);
2471   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2472   Method* method = ik->methods()->at(method_index);
2473   return method->is_overpass();
2474 JVM_END
2475 
2476 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2477   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2478   Method* method = ik->methods()->at(method_index);
2479   return method->name()->as_utf8();
2480 JVM_END
2481 
2482 
2483 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2484   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2485   Method* method = ik->methods()->at(method_index);
2486   return method->signature()->as_utf8();
2487 JVM_END
2488 
2489 /**
2490  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2491  * read entries in the constant pool.  Since the old verifier always
2492  * works on a copy of the code, it will not see any rewriting that
2493  * may possibly occur in the middle of verification.  So it is important
2494  * that nothing it calls tries to use the cpCache instead of the raw
2495  * constant pool, so we must use cp->uncached_x methods when appropriate.
2496  */
2497 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2498   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2499   ConstantPool* cp = ik->constants();
2500   switch (cp->tag_at(cp_index).value()) {
2501     case JVM_CONSTANT_Fieldref:
2502       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2503     default:
2504       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2505   }
2506   ShouldNotReachHere();
2507   return nullptr;
2508 JVM_END
2509 
2510 
2511 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2512   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2513   ConstantPool* cp = ik->constants();
2514   switch (cp->tag_at(cp_index).value()) {
2515     case JVM_CONSTANT_InterfaceMethodref:
2516     case JVM_CONSTANT_Methodref:
2517       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2518     default:
2519       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2520   }
2521   ShouldNotReachHere();
2522   return nullptr;
2523 JVM_END
2524 
2525 
2526 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2527   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2528   ConstantPool* cp = ik->constants();
2529   switch (cp->tag_at(cp_index).value()) {
2530     case JVM_CONSTANT_InterfaceMethodref:
2531     case JVM_CONSTANT_Methodref:
2532       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2533     default:
2534       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2535   }
2536   ShouldNotReachHere();
2537   return nullptr;
2538 JVM_END
2539 
2540 
2541 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2542   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2543   ConstantPool* cp = ik->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 nullptr;
2552 JVM_END
2553 
2554 
2555 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2556   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2557   ConstantPool* cp = ik->constants();
2558   Symbol* classname = cp->klass_name_at(cp_index);
2559   return classname->as_utf8();
2560 JVM_END
2561 
2562 
2563 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2564   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2565   ConstantPool* cp = ik->constants();
2566   switch (cp->tag_at(cp_index).value()) {
2567     case JVM_CONSTANT_Fieldref: {
2568       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2569       Symbol* classname = cp->klass_name_at(class_index);
2570       return classname->as_utf8();
2571     }
2572     default:
2573       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2574   }
2575   ShouldNotReachHere();
2576   return nullptr;
2577 JVM_END
2578 
2579 
2580 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2581   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2582   ConstantPool* cp = ik->constants();
2583   switch (cp->tag_at(cp_index).value()) {
2584     case JVM_CONSTANT_Methodref:
2585     case JVM_CONSTANT_InterfaceMethodref: {
2586       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2587       Symbol* classname = cp->klass_name_at(class_index);
2588       return classname->as_utf8();
2589     }
2590     default:
2591       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2592   }
2593   ShouldNotReachHere();
2594   return nullptr;
2595 JVM_END
2596 
2597 
2598 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2599   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2600   InstanceKlass* ik_called = get_instance_klass_considering_redefinition(called_cls, thread);
2601   ConstantPool* cp = ik->constants();
2602   ConstantPool* cp_called = ik_called->constants();
2603   switch (cp->tag_at(cp_index).value()) {
2604     case JVM_CONSTANT_Fieldref: {
2605       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2606       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2607       for (JavaFieldStream fs(ik_called); !fs.done(); fs.next()) {
2608         if (fs.name() == name && fs.signature() == signature) {
2609           return fs.access_flags().as_field_flags();
2610         }
2611       }
2612       return -1;
2613     }
2614     default:
2615       fatal("JVM_GetCPFieldModifiers: illegal constant");
2616   }
2617   ShouldNotReachHere();
2618   return 0;
2619 JVM_END
2620 
2621 
2622 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2623   InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2624   InstanceKlass* ik_called = get_instance_klass_considering_redefinition(called_cls, thread);
2625   ConstantPool* cp = ik->constants();
2626   switch (cp->tag_at(cp_index).value()) {
2627     case JVM_CONSTANT_Methodref:
2628     case JVM_CONSTANT_InterfaceMethodref: {
2629       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2630       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2631       Array<Method*>* methods = ik_called->methods();
2632       int methods_count = methods->length();
2633       for (int i = 0; i < methods_count; i++) {
2634         Method* method = methods->at(i);
2635         if (method->name() == name && method->signature() == signature) {
2636             return method->access_flags().as_method_flags();
2637         }
2638       }
2639       return -1;
2640     }
2641     default:
2642       fatal("JVM_GetCPMethodModifiers: illegal constant");
2643   }
2644   ShouldNotReachHere();
2645   return 0;
2646 JVM_END
2647 
2648 
2649 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2650 
2651 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2652   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2653 JVM_END
2654 
2655 
2656 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2657   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2658   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2659   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2660   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2661   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2662 JVM_END
2663 
2664 // Printing support //////////////////////////////////////////////////
2665 extern "C" {
2666 
2667 ATTRIBUTE_PRINTF(3, 0)
2668 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2669   // Reject count values that are negative signed values converted to
2670   // unsigned; see bug 4399518, 4417214
2671   if ((intptr_t)count <= 0) return -1;
2672 
2673   int result = os::vsnprintf(str, count, fmt, args);
2674   if (result > 0 && (size_t)result >= count) {
2675     result = -1;
2676   }
2677 
2678   return result;
2679 }
2680 
2681 ATTRIBUTE_PRINTF(3, 4)
2682 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2683   va_list args;
2684   int len;
2685   va_start(args, fmt);
2686   len = jio_vsnprintf(str, count, fmt, args);
2687   va_end(args);
2688   return len;
2689 }
2690 
2691 ATTRIBUTE_PRINTF(2, 3)
2692 int jio_fprintf(FILE* f, const char *fmt, ...) {
2693   int len;
2694   va_list args;
2695   va_start(args, fmt);
2696   len = jio_vfprintf(f, fmt, args);
2697   va_end(args);
2698   return len;
2699 }
2700 
2701 ATTRIBUTE_PRINTF(2, 0)
2702 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2703   if (Arguments::vfprintf_hook() != nullptr) {
2704      return Arguments::vfprintf_hook()(f, fmt, args);
2705   } else {
2706     return vfprintf(f, fmt, args);
2707   }
2708 }
2709 
2710 ATTRIBUTE_PRINTF(1, 2)
2711 JNIEXPORT int jio_printf(const char *fmt, ...) {
2712   int len;
2713   va_list args;
2714   va_start(args, fmt);
2715   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2716   va_end(args);
2717   return len;
2718 }
2719 
2720 // HotSpot specific jio method
2721 void jio_print(const char* s, size_t len) {
2722   // Try to make this function as atomic as possible.
2723   if (Arguments::vfprintf_hook() != nullptr) {
2724     jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2725   } else {
2726     // Make an unused local variable to avoid warning from gcc compiler.
2727     bool dummy = os::write(defaultStream::output_fd(), s, len);
2728   }
2729 }
2730 
2731 } // Extern C
2732 
2733 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2734 
2735 // In most of the JVM thread support functions we need to access the
2736 // thread through a ThreadsListHandle to prevent it from exiting and
2737 // being reclaimed while we try to operate on it. The exceptions to this
2738 // rule are when operating on the current thread, or if the monitor of
2739 // the target java.lang.Thread is locked at the Java level - in both
2740 // cases the target cannot exit.
2741 
2742 static void thread_entry(JavaThread* thread, TRAPS) {
2743   HandleMark hm(THREAD);
2744   Handle obj(THREAD, thread->threadObj());
2745   JavaValue result(T_VOID);
2746   JavaCalls::call_virtual(&result,
2747                           obj,
2748                           vmClasses::Thread_klass(),
2749                           vmSymbols::run_method_name(),
2750                           vmSymbols::void_method_signature(),
2751                           THREAD);
2752 }
2753 
2754 
2755 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2756 #if INCLUDE_CDS
2757   if (CDSConfig::allow_only_single_java_thread()) {
2758     // During java -Xshare:dump, if we allow multiple Java threads to
2759     // execute in parallel, symbols and classes may be loaded in
2760     // random orders which will make the resulting CDS archive
2761     // non-deterministic.
2762     //
2763     // Lucikly, during java -Xshare:dump, it's important to run only
2764     // the code in the main Java thread (which is NOT started here) that
2765     // creates the module graph, etc. It's safe to not start the other
2766     // threads which are launched by class static initializers
2767     // (ReferenceHandler, FinalizerThread and CleanerImpl).
2768     if (log_is_enabled(Info, aot)) {
2769       ResourceMark rm;
2770       oop t = JNIHandles::resolve_non_null(jthread);
2771       log_info(aot)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2772     }
2773     return;
2774   }
2775 #endif
2776   JavaThread *native_thread = nullptr;
2777 
2778   // We cannot hold the Threads_lock when we throw an exception,
2779   // due to rank ordering issues. Example:  we might need to grab the
2780   // Heap_lock while we construct the exception.
2781   bool throw_illegal_thread_state = false;
2782 
2783   // We must release the Threads_lock before we can post a jvmti event
2784   // in Thread::start.
2785   {
2786     ConditionalMutexLocker throttle_ml(ThreadsLockThrottle_lock, UseThreadsLockThrottleLock);
2787     // Ensure that the C++ Thread and OSThread structures aren't freed before
2788     // we operate.
2789     MutexLocker ml(Threads_lock);
2790 
2791     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2792     // re-starting an already started thread, so we should usually find
2793     // that the JavaThread is null. However for a JNI attached thread
2794     // there is a small window between the Thread object being created
2795     // (with its JavaThread set) and the update to its threadStatus, so we
2796     // have to check for this
2797     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != nullptr) {
2798       throw_illegal_thread_state = true;
2799     } else {
2800       jlong size =
2801              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2802       // Allocate the C++ Thread structure and create the native thread.  The
2803       // stack size retrieved from java is 64-bit signed, but the constructor takes
2804       // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2805       //  - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2806       //  - Avoid passing negative values which would result in really large stacks.
2807       NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2808       size_t sz = size > 0 ? (size_t) size : 0;
2809       native_thread = new JavaThread(&thread_entry, sz);
2810 
2811       // At this point it may be possible that no osthread was created for the
2812       // JavaThread due to lack of memory. Check for this situation and throw
2813       // an exception if necessary. Eventually we may want to change this so
2814       // that we only grab the lock if the thread was created successfully -
2815       // then we can also do this check and throw the exception in the
2816       // JavaThread constructor.
2817       if (native_thread->osthread() != nullptr) {
2818         // Note: the current thread is not being used within "prepare".
2819         native_thread->prepare(jthread);
2820       }
2821     }
2822   }
2823 
2824   if (throw_illegal_thread_state) {
2825     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2826   }
2827 
2828   assert(native_thread != nullptr, "Starting null thread?");
2829 
2830   if (native_thread->osthread() == nullptr) {
2831     ResourceMark rm(thread);
2832     log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2833                             JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2834     // No one should hold a reference to the 'native_thread'.
2835     native_thread->smr_delete();
2836     if (JvmtiExport::should_post_resource_exhausted()) {
2837       JvmtiExport::post_resource_exhausted(
2838         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2839         os::native_thread_creation_failed_msg());
2840     }
2841     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2842               os::native_thread_creation_failed_msg());
2843   }
2844 
2845   JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2846 
2847   Thread::start(native_thread);
2848 
2849 JVM_END
2850 
2851 
2852 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2853   ThreadsListHandle tlh(thread);
2854   oop java_thread = nullptr;
2855   JavaThread* receiver = nullptr;
2856   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2857   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2858 
2859   if (is_alive) {
2860     // jthread refers to a live JavaThread.
2861     Thread::set_priority(receiver, (ThreadPriority)prio);
2862   }
2863   // Implied else: If the JavaThread hasn't started yet, then the
2864   // priority set in the java.lang.Thread object above will be pushed
2865   // down when it does start.
2866 JVM_END
2867 
2868 
2869 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
2870   HOTSPOT_THREAD_YIELD();
2871   os::naked_yield();
2872 JVM_END
2873 
2874 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2875   if (nanos < 0) {
2876     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2877   }
2878 
2879   if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2880     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2881   }
2882 
2883   // Save current thread state and restore it at the end of this block.
2884   // And set new thread state to SLEEPING.
2885   JavaThreadSleepState jtss(thread);
2886 
2887   HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2888 
2889   if (nanos == 0) {
2890     os::naked_yield();
2891   } else {
2892     ThreadState old_state = thread->osthread()->get_state();
2893     thread->osthread()->set_state(SLEEPING);
2894     if (!thread->sleep_nanos(nanos)) { // interrupted or async exception was installed
2895       // An asynchronous exception could have been thrown on
2896       // us while we were sleeping. We do not overwrite those.
2897       if (!HAS_PENDING_EXCEPTION) {
2898         HOTSPOT_THREAD_SLEEP_END(1);
2899         if (!thread->has_async_exception_condition()) {
2900           // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2901           // to properly restore the thread state.  That's likely wrong.
2902           THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2903         }
2904       }
2905     }
2906     thread->osthread()->set_state(old_state);
2907   }
2908   HOTSPOT_THREAD_SLEEP_END(0);
2909 JVM_END
2910 
2911 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2912   oop jthread = thread->threadObj();
2913   assert(jthread != nullptr, "no current carrier thread!");
2914   return JNIHandles::make_local(THREAD, jthread);
2915 JVM_END
2916 
2917 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2918   oop theThread = thread->vthread();
2919   assert(theThread != (oop)nullptr, "no current thread!");
2920   return JNIHandles::make_local(THREAD, theThread);
2921 JVM_END
2922 
2923 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2924                                      jobject theThread))
2925   oop threadObj = JNIHandles::resolve(theThread);
2926   thread->set_vthread(threadObj);
2927 
2928   // Set _monitor_owner_id of new current Thread
2929   thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2930 
2931   JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2932 JVM_END
2933 
2934 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
2935   return ThreadIdentifier::unsafe_offset();
2936 JVM_END
2937 
2938 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
2939   ThreadsListHandle tlh(thread);
2940   JavaThread* receiver = nullptr;
2941   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
2942   if (is_alive) {
2943     // jthread refers to a live JavaThread.
2944     receiver->interrupt();
2945   }
2946 JVM_END
2947 
2948 // Return true iff the current thread has locked the object passed in
2949 
2950 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2951   if (obj == nullptr) {
2952     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2953   }
2954   Handle h_obj(THREAD, JNIHandles::resolve(obj));
2955   return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
2956 JVM_END
2957 
2958 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
2959   oop trace = java_lang_Thread::async_get_stack_trace(jthread, THREAD);
2960   return JNIHandles::make_local(THREAD, trace);
2961 JVM_END
2962 
2963 JVM_ENTRY_PROF(jobject, JVM_CreateThreadSnapshot, JVM_CreateThreadSnapshot(JNIEnv* env, jobject jthread))
2964 #if INCLUDE_JVMTI
2965   oop snapshot = ThreadSnapshotFactory::get_thread_snapshot(jthread, THREAD);
2966   return JNIHandles::make_local(THREAD, snapshot);
2967 #else
2968   THROW_NULL(vmSymbols::java_lang_UnsupportedOperationException());
2969 #endif
2970 JVM_END
2971 
2972 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
2973   // We don't use a ThreadsListHandle here because the current thread
2974   // must be alive.
2975   oop java_thread = JNIHandles::resolve_non_null(jthread);
2976   JavaThread* thr = java_lang_Thread::thread(java_thread);
2977   if (thread == thr && !thr->has_attached_via_jni()) {
2978     // Thread naming is only supported for the current thread and
2979     // we don't set the name of an attached thread to avoid stepping
2980     // on other programs.
2981     ResourceMark rm(thread);
2982     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2983     os::set_native_thread_name(thread_name);
2984   }
2985 JVM_END
2986 
2987 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
2988   oop theCache = thread->scopedValueCache();
2989   return JNIHandles::make_local(THREAD, theCache);
2990 JVM_END
2991 
2992 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
2993                                        jobject theCache))
2994   arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
2995   thread->set_scopedValueCache(objs);
2996 JVM_END
2997 
2998 // java.lang.Package ////////////////////////////////////////////////////////////////
2999 
3000 
3001 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3002   ResourceMark rm(THREAD);
3003   JvmtiVMObjectAllocEventCollector oam;
3004   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3005   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3006 return (jstring) JNIHandles::make_local(THREAD, result);
3007 JVM_END
3008 
3009 
3010 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3011   JvmtiVMObjectAllocEventCollector oam;
3012   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3013   return (jobjectArray) JNIHandles::make_local(THREAD, result);
3014 JVM_END
3015 
3016 
3017 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3018 
3019 
3020 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3021   MonitorLocker ml(Heap_lock);
3022   oop ref = Universe::reference_pending_list();
3023   if (ref != nullptr) {
3024     Universe::clear_reference_pending_list();
3025   }
3026   return JNIHandles::make_local(THREAD, ref);
3027 JVM_END
3028 
3029 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3030   MonitorLocker ml(Heap_lock);
3031   return Universe::has_reference_pending_list();
3032 JVM_END
3033 
3034 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3035   MonitorLocker ml(Heap_lock);
3036   while (!Universe::has_reference_pending_list()) {
3037     ml.wait();
3038   }
3039 JVM_END
3040 
3041 JVM_ENTRY_PROF(jobject, JVM_ReferenceGet, JVM_ReferenceGet(JNIEnv* env, jobject ref))
3042   oop ref_oop = JNIHandles::resolve_non_null(ref);
3043   // PhantomReference has its own implementation of get().
3044   assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3045   oop referent = java_lang_ref_Reference::weak_referent(ref_oop);
3046   return JNIHandles::make_local(THREAD, referent);
3047 JVM_END
3048 
3049 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3050   oop ref_oop = JNIHandles::resolve_non_null(ref);
3051   // PhantomReference has its own implementation of refersTo().
3052   // See: JVM_PhantomReferenceRefersTo
3053   assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3054   oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3055   return referent == JNIHandles::resolve(o);
3056 JVM_END
3057 
3058 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3059   oop ref_oop = JNIHandles::resolve_non_null(ref);
3060   // FinalReference has it's own implementation of clear().
3061   assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3062   if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3063     // If the referent has already been cleared then done.
3064     // However, if the referent is dead but has not yet been cleared by
3065     // concurrent reference processing, it should NOT be cleared here.
3066     // Instead, clearing should be left to the GC.  Clearing it here could
3067     // detectably lose an expected notification, which is impossible with
3068     // STW reference processing.  The clearing in enqueue() doesn't have
3069     // this problem, since the enqueue covers the notification, but it's not
3070     // worth the effort to handle that case specially.
3071     return;
3072   }
3073   java_lang_ref_Reference::clear_referent(ref_oop);
3074 JVM_END
3075 
3076 
3077 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3078 
3079 
3080 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3081   oop ref_oop = JNIHandles::resolve_non_null(ref);
3082   oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3083   return referent == JNIHandles::resolve(o);
3084 JVM_END
3085 
3086 
3087 // ObjectInputStream ///////////////////////////////////////////////////////////////
3088 
3089 // Return the first user-defined class loader up the execution stack, or null
3090 // if only code from the bootstrap or platform class loader is on the stack.
3091 
3092 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3093   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3094     InstanceKlass* ik = vfst.method()->method_holder();
3095     oop loader = ik->class_loader();
3096     if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3097       return JNIHandles::make_local(THREAD, loader);
3098     }
3099   }
3100   return nullptr;
3101 JVM_END
3102 
3103 
3104 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3105 
3106 
3107 // resolve array handle and check arguments
3108 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3109   if (arr == nullptr) {
3110     THROW_NULL(vmSymbols::java_lang_NullPointerException());
3111   }
3112   oop a = JNIHandles::resolve_non_null(arr);
3113   if (!a->is_array()) {
3114     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3115   } else if (type_array_only && !a->is_typeArray()) {
3116     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3117   }
3118   return arrayOop(a);
3119 }
3120 
3121 
3122 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3123   arrayOop a = check_array(env, arr, false, CHECK_0);
3124   return a->length();
3125 JVM_END
3126 
3127 
3128 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3129   JvmtiVMObjectAllocEventCollector oam;
3130   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3131   jvalue value;
3132   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3133   oop box = Reflection::box(&value, type, CHECK_NULL);
3134   return JNIHandles::make_local(THREAD, box);
3135 JVM_END
3136 
3137 
3138 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3139   jvalue value;
3140   value.i = 0; // to initialize value before getting used in CHECK
3141   arrayOop a = check_array(env, arr, true, CHECK_(value));
3142   assert(a->is_typeArray(), "just checking");
3143   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3144   BasicType wide_type = (BasicType) wCode;
3145   if (type != wide_type) {
3146     Reflection::widen(&value, type, wide_type, CHECK_(value));
3147   }
3148   return value;
3149 JVM_END
3150 
3151 
3152 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3153   arrayOop a = check_array(env, arr, false, CHECK);
3154   oop box = JNIHandles::resolve(val);
3155   jvalue value;
3156   value.i = 0; // to initialize value before getting used in CHECK
3157   BasicType value_type;
3158   if (a->is_objArray()) {
3159     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3160     value_type = Reflection::unbox_for_regular_object(box, &value);
3161   } else {
3162     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3163   }
3164   Reflection::array_set(&value, a, index, value_type, CHECK);
3165 JVM_END
3166 
3167 
3168 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3169   arrayOop a = check_array(env, arr, true, CHECK);
3170   assert(a->is_typeArray(), "just checking");
3171   BasicType value_type = (BasicType) vCode;
3172   Reflection::array_set(&v, a, index, value_type, CHECK);
3173 JVM_END
3174 
3175 
3176 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3177   JvmtiVMObjectAllocEventCollector oam;
3178   oop element_mirror = JNIHandles::resolve(eltClass);
3179   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3180   return JNIHandles::make_local(THREAD, result);
3181 JVM_END
3182 
3183 
3184 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3185   JvmtiVMObjectAllocEventCollector oam;
3186   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3187   oop element_mirror = JNIHandles::resolve(eltClass);
3188   assert(dim_array->is_typeArray(), "just checking");
3189   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3190   return JNIHandles::make_local(THREAD, result);
3191 JVM_END
3192 
3193 
3194 // Library support ///////////////////////////////////////////////////////////////////////////
3195 
3196 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3197   return ZipLibrary::handle();
3198 JVM_END
3199 
3200 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3201   //%note jvm_ct
3202   char ebuf[1024];
3203   void *load_result;
3204   {
3205     ThreadToNativeFromVM ttnfvm(thread);
3206     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3207   }
3208   if (load_result == nullptr) {
3209     if (throwException) {
3210       char msg[1024];
3211       jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3212       // Since 'ebuf' may contain a string encoded using
3213       // platform encoding scheme, we need to pass
3214       // Exceptions::unsafe_to_utf8 to the new_exception method
3215       // as the last argument. See bug 6367357.
3216       Handle h_exception =
3217         Exceptions::new_exception(thread,
3218                                   vmSymbols::java_lang_UnsatisfiedLinkError(),
3219                                   msg, Exceptions::unsafe_to_utf8);
3220 
3221       THROW_HANDLE_NULL(h_exception);
3222     } else {
3223       log_info(library)("Failed to load library %s", name);
3224       return load_result;
3225     }
3226   }
3227   log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3228   return load_result;
3229 JVM_END
3230 
3231 
3232 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3233   os::dll_unload(handle);
3234   log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3235 JVM_END
3236 
3237 
3238 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3239   void* find_result = os::dll_lookup(handle, name);
3240   log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3241                     find_result != nullptr ? "Found" : "Failed to find",
3242                     name, p2i(handle));
3243   return find_result;
3244 JVM_END
3245 
3246 
3247 // JNI version ///////////////////////////////////////////////////////////////////////////////
3248 
3249 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3250   return Threads::is_supported_jni_version_including_1_1(version);
3251 JVM_END
3252 
3253 
3254 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3255   return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3256 JVM_END
3257 
3258 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3259   return VMContinuations ? JNI_TRUE : JNI_FALSE;
3260 JVM_END
3261 
3262 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3263   return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3264 JVM_END
3265 
3266 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3267   return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3268 JVM_END
3269 
3270 // String support ///////////////////////////////////////////////////////////////////////////
3271 
3272 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3273   JvmtiVMObjectAllocEventCollector oam;
3274   if (str == nullptr) return nullptr;
3275   oop string = JNIHandles::resolve_non_null(str);
3276   oop result = StringTable::intern(string, CHECK_NULL);
3277   return (jstring) JNIHandles::make_local(THREAD, result);
3278 JVM_END
3279 
3280 
3281 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3282 
3283 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3284 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3285 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3286 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3287 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3288 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3289 
3290 
3291 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3292   VM_Exit::block_if_vm_exited();
3293   return new PlatformMutex();
3294 }
3295 
3296 
3297 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3298   VM_Exit::block_if_vm_exited();
3299   delete ((PlatformMutex*) mon);
3300 }
3301 
3302 
3303 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3304   VM_Exit::block_if_vm_exited();
3305   ((PlatformMutex*) mon)->lock();
3306   return 0;
3307 }
3308 
3309 
3310 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3311   VM_Exit::block_if_vm_exited();
3312   ((PlatformMutex*) mon)->unlock();
3313 }
3314 
3315 
3316 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3317 
3318 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3319                                     Handle loader, jboolean throwError, TRAPS) {
3320   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3321 
3322   // Check if we should initialize the class
3323   if (init && klass->is_instance_klass()) {
3324     klass->initialize(CHECK_NULL);
3325   }
3326   return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3327 }
3328 
3329 
3330 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3331 
3332 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3333   Handle method_handle;
3334   if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3335     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3336     Handle receiver(THREAD, JNIHandles::resolve(obj));
3337     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3338     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3339     jobject res = JNIHandles::make_local(THREAD, result);
3340     if (JvmtiExport::should_post_vm_object_alloc()) {
3341       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3342       assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3343       if (java_lang_Class::is_primitive(ret_type)) {
3344         // Only for primitive type vm allocates memory for java object.
3345         // See box() method.
3346         JvmtiExport::post_vm_object_alloc(thread, result);
3347       }
3348     }
3349     return res;
3350   } else {
3351     THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3352   }
3353 JVM_END
3354 
3355 
3356 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3357   oop constructor_mirror = JNIHandles::resolve(c);
3358   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3359   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3360   jobject res = JNIHandles::make_local(THREAD, result);
3361   if (JvmtiExport::should_post_vm_object_alloc()) {
3362     JvmtiExport::post_vm_object_alloc(thread, result);
3363   }
3364   return res;
3365 JVM_END
3366 
3367 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3368   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3369   HeapShared::initialize_from_archived_subgraph(THREAD, k);
3370 JVM_END
3371 
3372 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3373                                               jclass caller,
3374                                               jstring interfaceMethodName,
3375                                               jobject factoryType,
3376                                               jobject interfaceMethodType,
3377                                               jobject implementationMember,
3378                                               jobject dynamicMethodType,
3379                                               jclass lambdaProxyClass))
3380 #if INCLUDE_CDS
3381   if (!CDSConfig::is_dumping_archive() || !CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
3382     return;
3383   }
3384 
3385   InstanceKlass* caller_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(caller));
3386   if (caller_ik->is_hidden()) {
3387     // Hidden classes not of type lambda proxy classes are currently not being archived.
3388     // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3389     // registered for archiving.
3390     return;
3391   }
3392   InstanceKlass* lambda_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(lambdaProxyClass));
3393   assert(lambda_ik->is_hidden(), "must be a hidden class");
3394   assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class");
3395 
3396   Symbol* interface_method_name = nullptr;
3397   if (interfaceMethodName != nullptr) {
3398     interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3399   }
3400   Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3401   Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3402 
3403   Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3404   Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3405 
3406   Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3407   assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3408   Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3409 
3410   Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3411   Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3412 
3413   LambdaProxyClassDictionary::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3414                                                      interface_method_type, m, dynamic_method_type, THREAD);
3415 #endif // INCLUDE_CDS
3416 JVM_END
3417 
3418 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3419                                                         jclass caller,
3420                                                         jstring interfaceMethodName,
3421                                                         jobject factoryType,
3422                                                         jobject interfaceMethodType,
3423                                                         jobject implementationMember,
3424                                                         jobject dynamicMethodType))
3425 #if INCLUDE_CDS
3426 
3427   if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3428       implementationMember == nullptr || dynamicMethodType == nullptr) {
3429     THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3430   }
3431 
3432   InstanceKlass* caller_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(caller));
3433   if (!caller_ik->in_aot_cache()) {
3434     // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3435     return nullptr;
3436   }
3437 
3438   Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3439   Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3440   Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3441 
3442   Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3443   Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3444 
3445   Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3446   assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3447   Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3448 
3449   Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3450   Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3451 
3452   InstanceKlass* loaded_lambda =
3453     LambdaProxyClassDictionary::load_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3454                                                                interface_method_type, m, dynamic_method_type,
3455                                                                CHECK_(nullptr));
3456   return loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3457 #else
3458   return nullptr;
3459 #endif // INCLUDE_CDS
3460 JVM_END
3461 
3462 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3463   if (CDSConfig::is_dumping_static_archive()) {
3464     // We do this so that the default CDS archive can be deterministic.
3465     const char* release = VM_Version::vm_release();
3466     const char* dbg_level = VM_Version::jdk_debug_level();
3467     const char* version = VM_Version::internal_vm_info_string();
3468     jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3469                          java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3470                          java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3471     seed += (jlong)VM_Version::vm_major_version();
3472     seed += (jlong)VM_Version::vm_minor_version();
3473     seed += (jlong)VM_Version::vm_security_version();
3474     seed += (jlong)VM_Version::vm_patch_version();
3475     if (seed == 0) { // don't let this ever be zero.
3476       seed = 0x87654321;
3477     }
3478     log_debug(aot)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3479     return seed;
3480   } else {
3481     return 0;
3482   }
3483 JVM_END
3484 
3485 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3486   return CDSConfig::get_status();
3487 JVM_END
3488 
3489 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3490 #if INCLUDE_CDS
3491   assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3492   if (line != nullptr) {
3493     ResourceMark rm(THREAD);
3494     Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3495     char* c_line = java_lang_String::as_utf8_string(h_line());
3496     if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3497       // Note: LambdaFormInvokers::append take same format which is not
3498       // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3499       LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3500     }
3501     if (ClassListWriter::is_enabled()) {
3502       ClassListWriter w;
3503       w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3504     }
3505   }
3506 #endif // INCLUDE_CDS
3507 JVM_END
3508 
3509 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3510 #if INCLUDE_CDS
3511   assert(CDSConfig::is_logging_dynamic_proxies(),  "sanity");
3512 
3513   ResourceMark rm(THREAD);
3514   oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3515   char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3516   oop loader_oop = JNIHandles::resolve(loader);
3517   objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3518 
3519   AOTConstantPoolResolver::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3520 #endif // INCLUDE_CDS
3521 JVM_END
3522 
3523 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3524 #if INCLUDE_CDS
3525   ResourceMark rm(THREAD);
3526   Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3527   char* file_name  = java_lang_String::as_utf8_string(file_handle());
3528   AOTMetaspace::dump_loaded_classes(file_name, THREAD);
3529 #endif // INCLUDE_CDS
3530 JVM_END
3531 
3532 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3533 #if INCLUDE_CDS
3534   ResourceMark rm(THREAD);
3535   Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3536   char* archive_name  = java_lang_String::as_utf8_string(file_handle());
3537   DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3538 #endif // INCLUDE_CDS
3539 JVM_END
3540 
3541 JVM_ENTRY(jboolean, JVM_NeedsClassInitBarrierForCDS(JNIEnv* env, jclass cls))
3542 #if INCLUDE_CDS
3543   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3544   if (!k->is_instance_klass()) {
3545     return false;
3546   } else {
3547     if (InstanceKlass::cast(k)->is_enum_subclass() ||
3548         AOTClassInitializer::can_archive_initialized_mirror(InstanceKlass::cast(k))) {
3549       // This class will be cached in AOT-initialized state. No need for init barriers.
3550       return false;
3551     } else {
3552       // If we cannot cache the class in AOT-initialized state, java.lang.invoke handles
3553       // must emit barriers to ensure class initialization during production run.
3554       ResourceMark rm(THREAD);
3555       log_debug(aot)("NeedsClassInitBarrierForCDS: %s", k->external_name());
3556       return true;
3557     }
3558   }
3559 #else
3560   return false;
3561 #endif // INCLUDE_CDS
3562 JVM_END
3563 
3564 // Returns an array of all live Thread objects (VM internal JavaThreads,
3565 // jvmti agent threads, and JNI attaching threads  are skipped)
3566 // See CR 6404306 regarding JNI attaching threads
3567 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3568   ResourceMark rm(THREAD);
3569   ThreadsListEnumerator tle(THREAD, false, false);
3570   JvmtiVMObjectAllocEventCollector oam;
3571 
3572   int num_threads = tle.num_threads();
3573   objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3574   objArrayHandle threads_ah(THREAD, r);
3575 
3576   for (int i = 0; i < num_threads; i++) {
3577     Handle h = tle.get_threadObj(i);
3578     threads_ah->obj_at_put(i, h());
3579   }
3580 
3581   return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3582 JVM_END
3583 
3584 
3585 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3586 // Return StackTraceElement[][], each element is the stack trace of a thread in
3587 // the corresponding entry in the given threads array
3588 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3589   JvmtiVMObjectAllocEventCollector oam;
3590 
3591   // Check if threads is null
3592   if (threads == nullptr) {
3593     THROW_NULL(vmSymbols::java_lang_NullPointerException());
3594   }
3595 
3596   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3597   objArrayHandle ah(THREAD, a);
3598   int num_threads = ah->length();
3599   // check if threads is non-empty array
3600   if (num_threads == 0) {
3601     THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3602   }
3603 
3604   // check if threads is not an array of objects of Thread class
3605   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3606   if (k != vmClasses::Thread_klass()) {
3607     THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3608   }
3609 
3610   ResourceMark rm(THREAD);
3611 
3612   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3613   for (int i = 0; i < num_threads; i++) {
3614     oop thread_obj = ah->obj_at(i);
3615     instanceHandle h(THREAD, (instanceOop) thread_obj);
3616     thread_handle_array->append(h);
3617   }
3618 
3619   // The JavaThread references in thread_handle_array are validated
3620   // in VM_ThreadDump::doit().
3621   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3622   return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3623 
3624 JVM_END
3625 
3626 // JVM monitoring and management support
3627 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3628   return Management::get_jmm_interface(version);
3629 JVM_END
3630 
3631 // com.sun.tools.attach.VirtualMachine agent properties support
3632 //
3633 // Initialize the agent properties with the properties maintained in the VM
3634 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3635   ResourceMark rm;
3636 
3637   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3638 
3639   PUTPROP(props, "sun.java.command", Arguments::java_command());
3640   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3641   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3642   return properties;
3643 JVM_END
3644 
3645 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3646 {
3647   JvmtiVMObjectAllocEventCollector oam;
3648 
3649   if (ofClass == nullptr) {
3650     return nullptr;
3651   }
3652   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3653   // Special handling for primitive objects
3654   if (java_lang_Class::is_primitive(mirror())) {
3655     return nullptr;
3656   }
3657   Klass* k = java_lang_Class::as_Klass(mirror());
3658   if (!k->is_instance_klass()) {
3659     return nullptr;
3660   }
3661   InstanceKlass* ik = InstanceKlass::cast(k);
3662   int encl_method_class_idx = ik->enclosing_method_class_index();
3663   if (encl_method_class_idx == 0) {
3664     return nullptr;
3665   }
3666   objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL);
3667   objArrayHandle dest(THREAD, dest_o);
3668   Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3669   dest->obj_at_put(0, enc_k->java_mirror());
3670   int encl_method_method_idx = ik->enclosing_method_method_index();
3671   if (encl_method_method_idx != 0) {
3672     Symbol* sym = ik->constants()->symbol_at(
3673                         extract_low_short_from_int(
3674                           ik->constants()->name_and_type_at(encl_method_method_idx)));
3675     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3676     dest->obj_at_put(1, str());
3677     sym = ik->constants()->symbol_at(
3678               extract_high_short_from_int(
3679                 ik->constants()->name_and_type_at(encl_method_method_idx)));
3680     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3681     dest->obj_at_put(2, str());
3682   }
3683   return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3684 }
3685 JVM_END
3686 
3687 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3688 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3689   ResourceMark rm(THREAD);
3690 
3691   if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3692     return nullptr;
3693   }
3694 
3695   char** vm_flags = Arguments::jvm_flags_array();
3696   char** vm_args = Arguments::jvm_args_array();
3697   int num_flags = Arguments::num_jvm_flags();
3698   int num_args = Arguments::num_jvm_args();
3699 
3700   InstanceKlass* ik = vmClasses::String_klass();
3701   objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3702   objArrayHandle result_h(THREAD, r);
3703 
3704   int index = 0;
3705   for (int j = 0; j < num_flags; j++, index++) {
3706     Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3707     result_h->obj_at_put(index, h());
3708   }
3709   for (int i = 0; i < num_args; i++, index++) {
3710     Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3711     result_h->obj_at_put(index, h());
3712   }
3713   return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3714 JVM_END
3715 
3716 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3717   return os::get_signal_number(name);
3718 JVM_END
3719 
3720 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3721 #if INCLUDE_JVMTI
3722   if (!DoJVMTIVirtualThreadTransitions) {
3723     assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3724     return;
3725   }
3726   if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3727     JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3728   } else {
3729     // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3730     JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3731   }
3732 #endif
3733 JVM_END
3734 
3735 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3736 #if INCLUDE_JVMTI
3737   if (!DoJVMTIVirtualThreadTransitions) {
3738     assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3739     return;
3740   }
3741   if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3742     JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3743   } else {
3744     // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3745     JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3746   }
3747 #endif
3748 JVM_END
3749 
3750 // If notifications are disabled then just update the VTMS transition bit and return.
3751 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3752 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3753 #if INCLUDE_JVMTI
3754   if (!DoJVMTIVirtualThreadTransitions) {
3755     assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3756     return;
3757   }
3758   if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3759     JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3760   } else {
3761     // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3762     JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3763   }
3764 #endif
3765 JVM_END
3766 
3767 // If notifications are disabled then just update the VTMS transition bit and return.
3768 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3769 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3770 #if INCLUDE_JVMTI
3771   if (!DoJVMTIVirtualThreadTransitions) {
3772     assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3773     return;
3774   }
3775   if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3776     JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3777   } else {
3778     // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3779     JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3780   }
3781 #endif
3782 JVM_END
3783 
3784 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3785 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3786 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3787 #if INCLUDE_JVMTI
3788   if (!DoJVMTIVirtualThreadTransitions) {
3789     assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3790     return;
3791   }
3792   assert(thread->is_disable_suspend() != (bool)enter,
3793          "nested or unbalanced monitor enter/exit is not allowed");
3794   thread->toggle_is_disable_suspend();
3795 #endif
3796 JVM_END
3797 
3798 JVM_ENTRY(void, JVM_VirtualThreadPinnedEvent(JNIEnv* env, jclass ignored, jstring op))
3799 #if INCLUDE_JFR
3800   freeze_result result = THREAD->last_freeze_fail_result();
3801   assert(result != freeze_ok, "sanity check");
3802   EventVirtualThreadPinned event(UNTIMED);
3803   event.set_starttime(THREAD->last_freeze_fail_time());
3804   if (event.should_commit()) {
3805     ResourceMark rm(THREAD);
3806     const char *str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(op));
3807     THREAD->post_vthread_pinned_event(&event, str, result);
3808   }
3809 #endif
3810 JVM_END
3811 
3812 JVM_ENTRY(jobject, JVM_TakeVirtualThreadListToUnblock(JNIEnv* env, jclass ignored))
3813   ParkEvent* parkEvent = ObjectMonitor::vthread_unparker_ParkEvent();
3814   assert(parkEvent != nullptr, "not initialized");
3815 
3816   OopHandle& list_head = ObjectMonitor::vthread_list_head();
3817   oop vthread_head = nullptr;
3818   while (true) {
3819     if (list_head.peek() != nullptr) {
3820       for (;;) {
3821         oop head = list_head.resolve();
3822         if (list_head.cmpxchg(head, nullptr) == head) {
3823           return JNIHandles::make_local(THREAD, head);
3824         }
3825       }
3826     }
3827     ThreadBlockInVM tbivm(THREAD);
3828     parkEvent->park();
3829   }
3830 JVM_END
3831 /*
3832  * Return the current class's class file version.  The low order 16 bits of the
3833  * returned jint contain the class's major version.  The high order 16 bits
3834  * contain the class's minor version.
3835  */
3836 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3837   oop mirror = JNIHandles::resolve_non_null(current);
3838   if (java_lang_Class::is_primitive(mirror)) {
3839     // return latest major version and minor version of 0.
3840     return JVM_CLASSFILE_MAJOR_VERSION;
3841   }
3842   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3843   return (ik->minor_version() << 16) | ik->major_version();
3844 JVM_END
3845 
3846 /*
3847  * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3848  * get the value will see a materialized value and not a scalar-replaced
3849  * null value.
3850  */
3851 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3852   JVM_EnsureMaterializedForStackWalk(env, value);
3853 JVM_END
3854 
3855 /*
3856  * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3857  */
3858 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
3859   return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3860 JVM_END
3861 
3862 #define DO_COUNTERS(macro) \
3863   macro(JVM_CurrentTimeMillis) \
3864   macro(JVM_NanoTime) \
3865   macro(JVM_GetNanoTimeAdjustment) \
3866   macro(JVM_ArrayCopy) \
3867   macro(JVM_GetProperties) \
3868   macro(JVM_GetTemporaryDirectory) \
3869   macro(JVM_BeforeHalt) \
3870   macro(JVM_Halt) \
3871   macro(JVM_GC) \
3872   macro(JVM_MaxObjectInspectionAge) \
3873   macro(JVM_TotalMemory) \
3874   macro(JVM_FreeMemory) \
3875   macro(JVM_MaxMemory) \
3876   macro(JVM_ActiveProcessorCount) \
3877   macro(JVM_IsUseContainerSupport) \
3878   macro(JVM_FillInStackTrace) \
3879   macro(JVM_GetExtendedNPEMessage) \
3880   macro(JVM_InitStackTraceElementArray) \
3881   macro(JVM_InitStackTraceElement) \
3882   macro(JVM_ExpandStackFrameInfo) \
3883   macro(JVM_CallStackWalk) \
3884   macro(JVM_MoreStackWalk) \
3885   macro(JVM_SetStackWalkContinuation) \
3886   macro(JVM_IHashCode) \
3887   macro(JVM_MonitorWait) \
3888   macro(JVM_MonitorNotify) \
3889   macro(JVM_MonitorNotifyAll) \
3890   macro(JVM_Clone) \
3891   macro(JVM_ReportFinalizationComplete) \
3892   macro(JVM_IsFinalizationEnabled) \
3893   macro(JVM_RegisterContinuationMethods) \
3894   macro(JVM_NativePath) \
3895   macro(JVM_GetCallerClass) \
3896   macro(JVM_FindPrimitiveClass) \
3897   macro(JVM_FindClassFromBootLoader) \
3898   macro(JVM_FindClassFromCaller) \
3899   macro(JVM_FindClassFromClass) \
3900   macro(JVM_DefineClass) \
3901   macro(JVM_LookupDefineClass) \
3902   macro(JVM_DefineClassWithSource) \
3903   macro(JVM_FindLoadedClass) \
3904   macro(JVM_DefineModule) \
3905   macro(JVM_SetBootLoaderUnnamedModule) \
3906   macro(JVM_AddModuleExports) \
3907   macro(JVM_AddModuleExportsToAllUnnamed) \
3908   macro(JVM_AddModuleExportsToAll) \
3909   macro(JVM_AddReadsModule) \
3910   macro(JVM_DefineArchivedModules) \
3911   macro(JVM_InitClassName) \
3912   macro(JVM_GetClassInterfaces) \
3913   macro(JVM_IsInterface) \
3914   macro(JVM_IsHiddenClass) \
3915   macro(JVM_FindScopedValueBindings) \
3916   macro(JVM_GetDeclaredClasses) \
3917   macro(JVM_GetDeclaringClass) \
3918   macro(JVM_GetSimpleBinaryName) \
3919   macro(JVM_GetClassSignature) \
3920   macro(JVM_GetClassAnnotations) \
3921   macro(JVM_GetClassTypeAnnotations) \
3922   macro(JVM_GetMethodTypeAnnotations) \
3923   macro(JVM_GetFieldTypeAnnotations) \
3924   macro(JVM_GetMethodParameters) \
3925   macro(JVM_GetClassDeclaredFields) \
3926   macro(JVM_IsRecord) \
3927   macro(JVM_GetRecordComponents) \
3928   macro(JVM_GetClassDeclaredMethods) \
3929   macro(JVM_GetClassDeclaredConstructors) \
3930   macro(JVM_AreNestMates) \
3931   macro(JVM_GetNestHost) \
3932   macro(JVM_GetNestMembers) \
3933   macro(JVM_GetPermittedSubclasses) \
3934   macro(JVM_GetClassConstantPool) \
3935   macro(JVM_ConstantPoolGetSize) \
3936   macro(JVM_ConstantPoolGetClassAt) \
3937   macro(JVM_ConstantPoolGetClassAtIfLoaded) \
3938   macro(JVM_ConstantPoolGetMethodAt) \
3939   macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
3940   macro(JVM_ConstantPoolGetFieldAt) \
3941   macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
3942   macro(JVM_ConstantPoolGetMemberRefInfoAt) \
3943   macro(JVM_ConstantPoolGetClassRefIndexAt) \
3944   macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
3945   macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
3946   macro(JVM_ConstantPoolGetIntAt) \
3947   macro(JVM_ConstantPoolGetLongAt) \
3948   macro(JVM_ConstantPoolGetFloatAt) \
3949   macro(JVM_ConstantPoolGetDoubleAt) \
3950   macro(JVM_ConstantPoolGetStringAt) \
3951   macro(JVM_ConstantPoolGetUTF8At) \
3952   macro(JVM_ConstantPoolGetTagAt) \
3953   macro(JVM_DesiredAssertionStatus) \
3954   macro(JVM_AssertionStatusDirectives) \
3955   macro(JVM_GetClassNameUTF) \
3956   macro(JVM_GetClassCPTypes) \
3957   macro(JVM_GetClassCPEntriesCount) \
3958   macro(JVM_GetClassFieldsCount) \
3959   macro(JVM_GetClassMethodsCount) \
3960   macro(JVM_GetMethodIxExceptionIndexes) \
3961   macro(JVM_GetMethodIxExceptionsCount) \
3962   macro(JVM_GetMethodIxByteCode) \
3963   macro(JVM_GetMethodIxByteCodeLength) \
3964   macro(JVM_GetMethodIxExceptionTableEntry) \
3965   macro(JVM_GetMethodIxExceptionTableLength) \
3966   macro(JVM_GetMethodIxModifiers) \
3967   macro(JVM_GetFieldIxModifiers) \
3968   macro(JVM_GetMethodIxLocalsCount) \
3969   macro(JVM_GetMethodIxArgsSize) \
3970   macro(JVM_GetMethodIxMaxStack) \
3971   macro(JVM_IsConstructorIx) \
3972   macro(JVM_IsVMGeneratedMethodIx) \
3973   macro(JVM_GetMethodIxNameUTF) \
3974   macro(JVM_GetMethodIxSignatureUTF) \
3975   macro(JVM_GetCPFieldNameUTF) \
3976   macro(JVM_GetCPMethodNameUTF) \
3977   macro(JVM_GetCPMethodSignatureUTF) \
3978   macro(JVM_GetCPFieldSignatureUTF) \
3979   macro(JVM_GetCPClassNameUTF) \
3980   macro(JVM_GetCPFieldClassNameUTF) \
3981   macro(JVM_GetCPMethodClassNameUTF) \
3982   macro(JVM_GetCPFieldModifiers) \
3983   macro(JVM_GetCPMethodModifiers) \
3984   macro(JVM_ReleaseUTF) \
3985   macro(JVM_IsSameClassPackage) \
3986   macro(JVM_StartThread) \
3987   macro(JVM_SetThreadPriority) \
3988   macro(JVM_Yield) \
3989   macro(JVM_SleepNanos) \
3990   macro(JVM_CurrentCarrierThread) \
3991   macro(JVM_CurrentThread) \
3992   macro(JVM_SetCurrentThread) \
3993   macro(JVM_GetNextThreadIdOffset) \
3994   macro(JVM_Interrupt) \
3995   macro(JVM_HoldsLock) \
3996   macro(JVM_GetStackTrace) \
3997   macro(JVM_CreateThreadSnapshot) \
3998   macro(JVM_SetNativeThreadName) \
3999   macro(JVM_ScopedValueCache) \
4000   macro(JVM_SetScopedValueCache) \
4001   macro(JVM_GetSystemPackage) \
4002   macro(JVM_GetSystemPackages) \
4003   macro(JVM_GetAndClearReferencePendingList) \
4004   macro(JVM_HasReferencePendingList) \
4005   macro(JVM_WaitForReferencePendingList) \
4006   macro(JVM_ReferenceGet) \
4007   macro(JVM_ReferenceRefersTo) \
4008   macro(JVM_ReferenceClear) \
4009   macro(JVM_PhantomReferenceRefersTo) \
4010   macro(JVM_LatestUserDefinedLoader) \
4011   macro(JVM_GetArrayLength) \
4012   macro(JVM_GetArrayElement) \
4013   macro(JVM_GetPrimitiveArrayElement) \
4014   macro(JVM_SetArrayElement) \
4015   macro(JVM_SetPrimitiveArrayElement) \
4016   macro(JVM_NewArray) \
4017   macro(JVM_NewMultiArray) \
4018   macro(JVM_LoadZipLibrary) \
4019   macro(JVM_LoadLibrary) \
4020   macro(JVM_UnloadLibrary) \
4021   macro(JVM_FindLibraryEntry) \
4022   macro(JVM_IsSupportedJNIVersion) \
4023   macro(JVM_IsPreviewEnabled) \
4024   macro(JVM_IsContinuationsSupported) \
4025   macro(JVM_IsForeignLinkerSupported) \
4026   macro(JVM_InternString) \
4027   macro(JVM_InvokeMethod) \
4028   macro(JVM_NewInstanceFromConstructor) \
4029   macro(JVM_InitializeFromArchive) \
4030   macro(JVM_RegisterLambdaProxyClassForArchiving) \
4031   macro(JVM_LookupLambdaProxyClassFromArchive) \
4032   macro(JVM_GetRandomSeedForDumping) \
4033   macro(JVM_LogLambdaFormInvoker) \
4034   macro(JVM_LogDynamicProxy) \
4035   macro(JVM_DumpClassListToFile) \
4036   macro(JVM_DumpDynamicArchive) \
4037   macro(JVM_GetAllThreads) \
4038   macro(JVM_DumpThreads) \
4039   macro(JVM_GetManagement) \
4040   macro(JVM_InitAgentProperties) \
4041   macro(JVM_GetEnclosingMethodInfo) \
4042   macro(JVM_GetVmArguments) \
4043   macro(JVM_FindSignal) \
4044   macro(JVM_VirtualThreadStart) \
4045   macro(JVM_VirtualThreadEnd) \
4046   macro(JVM_VirtualThreadMount) \
4047   macro(JVM_VirtualThreadUnmount) \
4048   macro(JVM_GetClassFileVersion) \
4049   macro(JVM_EnsureMaterializedForStackWalk_func) \
4050   macro(JVM_PrintWarningAtDynamicAgentLoad)
4051 
4052 #define INIT_COUNTER(name) \
4053     NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4054     NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4055 
4056 void perf_jvm_init() {
4057   if (ProfileVMCalls && UsePerfData) {
4058     EXCEPTION_MARK;
4059 
4060     DO_COUNTERS(INIT_COUNTER)
4061 
4062     if (HAS_PENDING_EXCEPTION) {
4063       vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4064     }
4065   }
4066 }
4067 
4068 #undef INIT_COUNTER
4069 
4070 #define PRINT_COUNTER(name) {\
4071   jlong count = _perf_##name##_count->get_value(); \
4072   if (count > 0) { \
4073     st->print_cr("  %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
4074                  #name,                                                   \
4075                  _perf_##name##_timer->elapsed_counter_value_us(),        \
4076                  _perf_##name##_timer->thread_counter_value_us(), count); \
4077   }}
4078 
4079 void perf_jvm_print_on(outputStream* st) {
4080   if (ProfileVMCalls && UsePerfData) {
4081     DO_COUNTERS(PRINT_COUNTER)
4082   } else {
4083     st->print_cr("  JVM:  no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4084   }
4085 }
4086 
4087 #undef PRINT_COUNTER