1 /*
   2  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "jvm.h"
  27 #include "classfile/classFileStream.hpp"
  28 #include "classfile/classLoader.hpp"
  29 #include "classfile/classLoaderData.inline.hpp"
  30 #include "classfile/javaAssertions.hpp"
  31 #include "classfile/javaClasses.inline.hpp"
  32 #include "classfile/moduleEntry.hpp"
  33 #include "classfile/modules.hpp"
  34 #include "classfile/packageEntry.hpp"
  35 #include "classfile/stringTable.hpp"
  36 #include "classfile/symbolTable.hpp"
  37 #include "classfile/systemDictionary.hpp"
  38 #include "classfile/vmSymbols.hpp"
  39 #include "gc/shared/collectedHeap.inline.hpp"
  40 #include "interpreter/bytecode.hpp"
  41 #include "jfr/jfrEvents.hpp"
  42 #include "logging/log.hpp"
  43 #include "memory/heapShared.hpp"
  44 #include "memory/oopFactory.hpp"
  45 #include "memory/referenceType.hpp"
  46 #include "memory/resourceArea.hpp"
  47 #include "memory/universe.hpp"
  48 #include "oops/access.inline.hpp"
  49 #include "oops/constantPool.hpp"
  50 #include "oops/fieldStreams.hpp"
  51 #include "oops/instanceKlass.hpp"
  52 #include "oops/method.hpp"
  53 #include "oops/objArrayKlass.hpp"
  54 #include "oops/objArrayOop.inline.hpp"
  55 #include "oops/oop.inline.hpp"
  56 #include "oops/valueArrayKlass.hpp"
  57 #include "prims/jvm_misc.hpp"
  58 #include "prims/jvmtiExport.hpp"
  59 #include "prims/jvmtiThreadState.hpp"
  60 #include "prims/nativeLookup.hpp"
  61 #include "prims/stackwalk.hpp"
  62 #include "runtime/arguments.hpp"
  63 #include "runtime/atomic.hpp"
  64 #include "runtime/handles.inline.hpp"
  65 #include "runtime/init.hpp"
  66 #include "runtime/interfaceSupport.inline.hpp"
  67 #include "runtime/deoptimization.hpp"
  68 #include "runtime/handshake.hpp"
  69 #include "runtime/java.hpp"
  70 #include "runtime/javaCalls.hpp"
  71 #include "runtime/jfieldIDWorkaround.hpp"
  72 #include "runtime/jniHandles.inline.hpp"
  73 #include "runtime/orderAccess.hpp"
  74 #include "runtime/os.inline.hpp"
  75 #include "runtime/perfData.hpp"
  76 #include "runtime/reflection.hpp"
  77 #include "runtime/thread.inline.hpp"
  78 #include "runtime/threadSMR.hpp"
  79 #include "runtime/vframe.inline.hpp"
  80 #include "runtime/vmOperations.hpp"
  81 #include "runtime/vm_version.hpp"
  82 #include "services/attachListener.hpp"
  83 #include "services/management.hpp"
  84 #include "services/threadService.hpp"
  85 #include "utilities/copy.hpp"
  86 #include "utilities/defaultStream.hpp"
  87 #include "utilities/dtrace.hpp"
  88 #include "utilities/events.hpp"
  89 #include "utilities/histogram.hpp"
  90 #include "utilities/macros.hpp"
  91 #include "utilities/utf8.hpp"
  92 #if INCLUDE_CDS
  93 #include "classfile/systemDictionaryShared.hpp"
  94 #endif
  95 
  96 #include <errno.h>
  97 
  98 /*
  99   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
 100   such ctors and calls MUST NOT come between an oop declaration/init and its
 101   usage because if objects are move this may cause various memory stomps, bus
 102   errors and segfaults. Here is a cookbook for causing so called "naked oop
 103   failures":
 104 
 105       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
 106           JVMWrapper("JVM_GetClassDeclaredFields");
 107 
 108           // Object address to be held directly in mirror & not visible to GC
 109           oop mirror = JNIHandles::resolve_non_null(ofClass);
 110 
 111           // If this ctor can hit a safepoint, moving objects around, then
 112           ComplexConstructor foo;
 113 
 114           // Boom! mirror may point to JUNK instead of the intended object
 115           (some dereference of mirror)
 116 
 117           // Here's another call that may block for GC, making mirror stale
 118           MutexLocker ml(some_lock);
 119 
 120           // And here's an initializer that can result in a stale oop
 121           // all in one step.
 122           oop o = call_that_can_throw_exception(TRAPS);
 123 
 124 
 125   The solution is to keep the oop declaration BELOW the ctor or function
 126   call that might cause a GC, do another resolve to reassign the oop, or
 127   consider use of a Handle instead of an oop so there is immunity from object
 128   motion. But note that the "QUICK" entries below do not have a handlemark
 129   and thus can only support use of handles passed in.
 130 */
 131 
 132 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
 133   ResourceMark rm;
 134   int line_number = -1;
 135   const char * source_file = NULL;
 136   const char * trace = "explicit";
 137   InstanceKlass* caller = NULL;
 138   JavaThread* jthread = JavaThread::current();
 139   if (jthread->has_last_Java_frame()) {
 140     vframeStream vfst(jthread);
 141 
 142     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
 143     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
 144     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
 145     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
 146     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
 147 
 148     Method* last_caller = NULL;
 149 
 150     while (!vfst.at_end()) {
 151       Method* m = vfst.method();
 152       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
 153           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
 154           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
 155         break;
 156       }
 157       last_caller = m;
 158       vfst.next();
 159     }
 160     // if this is called from Class.forName0 and that is called from Class.forName,
 161     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 162     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 163     bool found_it = false;
 164     if (!vfst.at_end() &&
 165         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 166         vfst.method()->name() == vmSymbols::forName0_name()) {
 167       vfst.next();
 168       if (!vfst.at_end() &&
 169           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 170           vfst.method()->name() == vmSymbols::forName_name()) {
 171         vfst.next();
 172         found_it = true;
 173       }
 174     } else if (last_caller != NULL &&
 175                last_caller->method_holder()->name() ==
 176                  vmSymbols::java_lang_ClassLoader() &&
 177                last_caller->name() == vmSymbols::loadClass_name()) {
 178       found_it = true;
 179     } else if (!vfst.at_end()) {
 180       if (vfst.method()->is_native()) {
 181         // JNI call
 182         found_it = true;
 183       }
 184     }
 185     if (found_it && !vfst.at_end()) {
 186       // found the caller
 187       caller = vfst.method()->method_holder();
 188       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 189       if (line_number == -1) {
 190         // show method name if it's a native method
 191         trace = vfst.method()->name_and_sig_as_C_string();
 192       }
 193       Symbol* s = caller->source_file_name();
 194       if (s != NULL) {
 195         source_file = s->as_C_string();
 196       }
 197     }
 198   }
 199   if (caller != NULL) {
 200     if (to_class != caller) {
 201       const char * from = caller->external_name();
 202       const char * to = to_class->external_name();
 203       // print in a single call to reduce interleaving between threads
 204       if (source_file != NULL) {
 205         log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
 206       } else {
 207         log_debug(class, resolve)("%s %s (%s)", from, to, trace);
 208       }
 209     }
 210   }
 211 }
 212 
 213 void trace_class_resolution(Klass* to_class) {
 214   EXCEPTION_MARK;
 215   trace_class_resolution_impl(to_class, THREAD);
 216   if (HAS_PENDING_EXCEPTION) {
 217     CLEAR_PENDING_EXCEPTION;
 218   }
 219 }
 220 
 221 // Wrapper to trace JVM functions
 222 
 223 #ifdef ASSERT
 224   Histogram* JVMHistogram;
 225   volatile int JVMHistogram_lock = 0;
 226 
 227   class JVMHistogramElement : public HistogramElement {
 228     public:
 229      JVMHistogramElement(const char* name);
 230   };
 231 
 232   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
 233     _name = elementName;
 234     uintx count = 0;
 235 
 236     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
 237       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
 238         count +=1;
 239         if ( (WarnOnStalledSpinLock > 0)
 240           && (count % WarnOnStalledSpinLock == 0)) {
 241           warning("JVMHistogram_lock seems to be stalled");
 242         }
 243       }
 244      }
 245 
 246     if(JVMHistogram == NULL)
 247       JVMHistogram = new Histogram("JVM Call Counts",100);
 248 
 249     JVMHistogram->add_element(this);
 250     Atomic::dec(&JVMHistogram_lock);
 251   }
 252 
 253   #define JVMCountWrapper(arg) \
 254       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
 255       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
 256 
 257   #define JVMWrapper(arg) JVMCountWrapper(arg);
 258 #else
 259   #define JVMWrapper(arg)
 260 #endif
 261 
 262 
 263 // Interface version /////////////////////////////////////////////////////////////////////
 264 
 265 
 266 JVM_LEAF(jint, JVM_GetInterfaceVersion())
 267   return JVM_INTERFACE_VERSION;
 268 JVM_END
 269 
 270 
 271 // java.lang.System //////////////////////////////////////////////////////////////////////
 272 
 273 
 274 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 275   JVMWrapper("JVM_CurrentTimeMillis");
 276   return os::javaTimeMillis();
 277 JVM_END
 278 
 279 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
 280   JVMWrapper("JVM_NanoTime");
 281   return os::javaTimeNanos();
 282 JVM_END
 283 
 284 // The function below is actually exposed by jdk.internal.misc.VM and not
 285 // java.lang.System, but we choose to keep it here so that it stays next
 286 // to JVM_CurrentTimeMillis and JVM_NanoTime
 287 
 288 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); //  2^32
 289 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
 290 
 291 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
 292   JVMWrapper("JVM_GetNanoTimeAdjustment");
 293   jlong seconds;
 294   jlong nanos;
 295 
 296   os::javaTimeSystemUTC(seconds, nanos);
 297 
 298   // We're going to verify that the result can fit in a long.
 299   // For that we need the difference in seconds between 'seconds'
 300   // and 'offset_secs' to be such that:
 301   //     |seconds - offset_secs| < (2^63/10^9)
 302   // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
 303   // which makes |seconds - offset_secs| < 2^33
 304   // and we will prefer +/- 2^32 as the maximum acceptable diff
 305   // as 2^32 has a more natural feel than 2^33...
 306   //
 307   // So if |seconds - offset_secs| >= 2^32 - we return a special
 308   // sentinel value (-1) which the caller should take as an
 309   // exception value indicating that the offset given to us is
 310   // too far from range of the current time - leading to too big
 311   // a nano adjustment. The caller is expected to recover by
 312   // computing a more accurate offset and calling this method
 313   // again. (For the record 2^32 secs is ~136 years, so that
 314   // should rarely happen)
 315   //
 316   jlong diff = seconds - offset_secs;
 317   if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
 318      return -1; // sentinel value: the offset is too far off the target
 319   }
 320 
 321   // return the adjustment. If you compute a time by adding
 322   // this number of nanoseconds along with the number of seconds
 323   // in the offset you should get the current UTC time.
 324   return (diff * (jlong)1000000000) + nanos;
 325 JVM_END
 326 
 327 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 328                                jobject dst, jint dst_pos, jint length))
 329   JVMWrapper("JVM_ArrayCopy");
 330   // Check if we have null pointers
 331   if (src == NULL || dst == NULL) {
 332     THROW(vmSymbols::java_lang_NullPointerException());
 333   }
 334   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 335   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 336   assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
 337   assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
 338   // Do copy
 339   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 340 JVM_END
 341 
 342 
 343 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 344   JavaValue r(T_OBJECT);
 345   // public synchronized Object put(Object key, Object value);
 346   HandleMark hm(THREAD);
 347   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 348   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
 349   JavaCalls::call_virtual(&r,
 350                           props,
 351                           SystemDictionary::Properties_klass(),
 352                           vmSymbols::put_name(),
 353                           vmSymbols::object_object_object_signature(),
 354                           key_str,
 355                           value_str,
 356                           THREAD);
 357 }
 358 
 359 
 360 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 361 
 362 /*
 363  * Return all of the system properties in a Java String array with alternating
 364  * names and values from the jvm SystemProperty.
 365  * Which includes some internal and all commandline -D defined properties.
 366  */
 367 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
 368   JVMWrapper("JVM_GetProperties");
 369   ResourceMark rm(THREAD);
 370   HandleMark hm(THREAD);
 371   int ndx = 0;
 372   int fixedCount = 2;
 373 
 374   SystemProperty* p = Arguments::system_properties();
 375   int count = Arguments::PropertyList_count(p);
 376 
 377   // Allocate result String array
 378   InstanceKlass* ik = SystemDictionary::String_klass();
 379   objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
 380   objArrayHandle result_h(THREAD, r);
 381 
 382   while (p != NULL) {
 383     const char * key = p->key();
 384     if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
 385         const char * value = p->value();
 386         Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
 387         Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
 388         result_h->obj_at_put(ndx * 2,  key_str());
 389         result_h->obj_at_put(ndx * 2 + 1, value_str());
 390         ndx++;
 391     }
 392     p = p->next();
 393   }
 394 
 395   // Convert the -XX:MaxDirectMemorySize= command line flag
 396   // to the sun.nio.MaxDirectMemorySize property.
 397   // Do this after setting user properties to prevent people
 398   // from setting the value with a -D option, as requested.
 399   // Leave empty if not supplied
 400   if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 401     char as_chars[256];
 402     jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
 403     Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
 404     Handle value_str  = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
 405     result_h->obj_at_put(ndx * 2,  key_str());
 406     result_h->obj_at_put(ndx * 2 + 1, value_str());
 407     ndx++;
 408   }
 409 
 410   // JVM monitoring and management support
 411   // Add the sun.management.compiler property for the compiler's name
 412   {
 413 #undef CSIZE
 414 #if defined(_LP64) || defined(_WIN64)
 415   #define CSIZE "64-Bit "
 416 #else
 417   #define CSIZE
 418 #endif // 64bit
 419 
 420 #ifdef TIERED
 421     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 422 #else
 423 #if defined(COMPILER1)
 424     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 425 #elif defined(COMPILER2)
 426     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 427 #elif INCLUDE_JVMCI
 428     #error "INCLUDE_JVMCI should imply TIERED"
 429 #else
 430     const char* compiler_name = "";
 431 #endif // compilers
 432 #endif // TIERED
 433 
 434     if (*compiler_name != '\0' &&
 435         (Arguments::mode() != Arguments::_int)) {
 436       Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
 437       Handle value_str  = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
 438       result_h->obj_at_put(ndx * 2,  key_str());
 439       result_h->obj_at_put(ndx * 2 + 1, value_str());
 440       ndx++;
 441     }
 442   }
 443 
 444   return (jobjectArray) JNIHandles::make_local(env, result_h());
 445 JVM_END
 446 
 447 
 448 /*
 449  * Return the temporary directory that the VM uses for the attach
 450  * and perf data files.
 451  *
 452  * It is important that this directory is well-known and the
 453  * same for all VM instances. It cannot be affected by configuration
 454  * variables such as java.io.tmpdir.
 455  */
 456 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
 457   JVMWrapper("JVM_GetTemporaryDirectory");
 458   HandleMark hm(THREAD);
 459   const char* temp_dir = os::get_temp_directory();
 460   Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
 461   return (jstring) JNIHandles::make_local(env, h());
 462 JVM_END
 463 
 464 
 465 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 466 
 467 extern volatile jint vm_created;
 468 
 469 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
 470   JVMWrapper("JVM_BeforeHalt");
 471   EventShutdown event;
 472   if (event.should_commit()) {
 473     event.set_reason("Shutdown requested from Java");
 474     event.commit();
 475   }
 476 JVM_END
 477 
 478 
 479 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
 480   before_exit(thread);
 481   vm_exit(code);
 482 JVM_END
 483 
 484 
 485 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
 486   JVMWrapper("JVM_GC");
 487   if (!DisableExplicitGC) {
 488     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 489   }
 490 JVM_END
 491 
 492 
 493 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
 494   JVMWrapper("JVM_MaxObjectInspectionAge");
 495   return Universe::heap()->millis_since_last_gc();
 496 JVM_END
 497 
 498 
 499 static inline jlong convert_size_t_to_jlong(size_t val) {
 500   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 501   NOT_LP64 (return (jlong)val;)
 502   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 503 }
 504 
 505 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
 506   JVMWrapper("JVM_TotalMemory");
 507   size_t n = Universe::heap()->capacity();
 508   return convert_size_t_to_jlong(n);
 509 JVM_END
 510 
 511 
 512 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
 513   JVMWrapper("JVM_FreeMemory");
 514   size_t n = Universe::heap()->unused();
 515   return convert_size_t_to_jlong(n);
 516 JVM_END
 517 
 518 
 519 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
 520   JVMWrapper("JVM_MaxMemory");
 521   size_t n = Universe::heap()->max_capacity();
 522   return convert_size_t_to_jlong(n);
 523 JVM_END
 524 
 525 
 526 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
 527   JVMWrapper("JVM_ActiveProcessorCount");
 528   return os::active_processor_count();
 529 JVM_END
 530 
 531 
 532 
 533 // java.lang.Throwable //////////////////////////////////////////////////////
 534 
 535 
 536 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
 537   JVMWrapper("JVM_FillInStackTrace");
 538   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
 539   java_lang_Throwable::fill_in_stack_trace(exception);
 540 JVM_END
 541 
 542 
 543 // java.lang.StackTraceElement //////////////////////////////////////////////
 544 
 545 
 546 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
 547   JVMWrapper("JVM_InitStackTraceElementArray");
 548   Handle exception(THREAD, JNIHandles::resolve(throwable));
 549   objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
 550   objArrayHandle stack_trace(THREAD, st);
 551   // Fill in the allocated stack trace
 552   java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
 553 JVM_END
 554 
 555 
 556 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
 557   JVMWrapper("JVM_InitStackTraceElement");
 558   Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
 559   Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
 560   java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
 561 JVM_END
 562 
 563 
 564 // java.lang.StackWalker //////////////////////////////////////////////////////
 565 
 566 
 567 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
 568                                      jint skip_frames, jint frame_count, jint start_index,
 569                                      jobjectArray frames))
 570   JVMWrapper("JVM_CallStackWalk");
 571   JavaThread* jt = (JavaThread*) THREAD;
 572   if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
 573     THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
 574   }
 575 
 576   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 577 
 578   // frames array is a Class<?>[] array when only getting caller reference,
 579   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 580   // be null.
 581   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 582   objArrayHandle frames_array_h(THREAD, fa);
 583 
 584   int limit = start_index + frame_count;
 585   if (frames_array_h->length() < limit) {
 586     THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
 587   }
 588 
 589   oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
 590                                start_index, frames_array_h, CHECK_NULL);
 591   return JNIHandles::make_local(env, result);
 592 JVM_END
 593 
 594 
 595 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
 596                                   jint frame_count, jint start_index,
 597                                   jobjectArray frames))
 598   JVMWrapper("JVM_MoreStackWalk");
 599   JavaThread* jt = (JavaThread*) THREAD;
 600 
 601   // frames array is a Class<?>[] array when only getting caller reference,
 602   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 603   // be null.
 604   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 605   objArrayHandle frames_array_h(THREAD, fa);
 606 
 607   int limit = start_index+frame_count;
 608   if (frames_array_h->length() < limit) {
 609     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
 610   }
 611 
 612   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 613   return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
 614                                    start_index, frames_array_h, THREAD);
 615 JVM_END
 616 
 617 // java.lang.Object ///////////////////////////////////////////////
 618 
 619 
 620 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 621   JVMWrapper("JVM_IHashCode");
 622   // as implemented in the classic virtual machine; return 0 if object is NULL
 623   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 624 JVM_END
 625 
 626 
 627 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 628   JVMWrapper("JVM_MonitorWait");
 629   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 630   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 631   if (JvmtiExport::should_post_monitor_wait()) {
 632     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 633 
 634     // The current thread already owns the monitor and it has not yet
 635     // been added to the wait queue so the current thread cannot be
 636     // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
 637     // event handler cannot accidentally consume an unpark() meant for
 638     // the ParkEvent associated with this ObjectMonitor.
 639   }
 640   ObjectSynchronizer::wait(obj, ms, CHECK);
 641 JVM_END
 642 
 643 
 644 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 645   JVMWrapper("JVM_MonitorNotify");
 646   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 647   ObjectSynchronizer::notify(obj, CHECK);
 648 JVM_END
 649 
 650 
 651 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 652   JVMWrapper("JVM_MonitorNotifyAll");
 653   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 654   ObjectSynchronizer::notifyall(obj, CHECK);
 655 JVM_END
 656 
 657 
 658 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 659   JVMWrapper("JVM_Clone");
 660   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 661   Klass* klass = obj->klass();
 662   JvmtiVMObjectAllocEventCollector oam;
 663 
 664 #ifdef ASSERT
 665   // Just checking that the cloneable flag is set correct
 666   if (obj->is_array()) {
 667     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 668   } else {
 669     guarantee(obj->is_instance(), "should be instanceOop");
 670     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 671     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 672   }
 673 #endif
 674 
 675   // Check if class of obj supports the Cloneable interface.
 676   // All arrays are considered to be cloneable (See JLS 20.1.5).
 677   // All j.l.r.Reference classes are considered non-cloneable.
 678   if (!klass->is_cloneable() ||
 679        klass->is_value() ||
 680       (klass->is_instance_klass() &&
 681        InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
 682     ResourceMark rm(THREAD);
 683     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 684   }
 685 
 686   // Make shallow object copy
 687   const int size = obj->size();
 688   oop new_obj_oop = NULL;
 689   if (obj->is_array()) {
 690     const int length = ((arrayOop)obj())->length();
 691     new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
 692                                                    /* do_zero */ true, CHECK_NULL);
 693   } else {
 694     new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
 695   }
 696 
 697   HeapAccess<>::clone(obj(), new_obj_oop, size);
 698 
 699   Handle new_obj(THREAD, new_obj_oop);
 700   // Caution: this involves a java upcall, so the clone should be
 701   // "gc-robust" by this stage.
 702   if (klass->has_finalizer()) {
 703     assert(obj->is_instance(), "should be instanceOop");
 704     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
 705     new_obj = Handle(THREAD, new_obj_oop);
 706   }
 707 
 708   return JNIHandles::make_local(env, new_obj());
 709 JVM_END
 710 
 711 // java.io.File ///////////////////////////////////////////////////////////////
 712 
 713 JVM_LEAF(char*, JVM_NativePath(char* path))
 714   JVMWrapper("JVM_NativePath");
 715   return os::native_path(path);
 716 JVM_END
 717 
 718 
 719 // Misc. class handling ///////////////////////////////////////////////////////////
 720 
 721 
 722 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
 723   JVMWrapper("JVM_GetCallerClass");
 724 
 725   // Getting the class of the caller frame.
 726   //
 727   // The call stack at this point looks something like this:
 728   //
 729   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 730   // [1] [ @CallerSensitive API.method                                   ]
 731   // [.] [ (skipped intermediate frames)                                 ]
 732   // [n] [ caller                                                        ]
 733   vframeStream vfst(thread);
 734   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 735   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 736     Method* m = vfst.method();
 737     assert(m != NULL, "sanity");
 738     switch (n) {
 739     case 0:
 740       // This must only be called from Reflection.getCallerClass
 741       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 742         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 743       }
 744       // fall-through
 745     case 1:
 746       // Frame 0 and 1 must be caller sensitive.
 747       if (!m->caller_sensitive()) {
 748         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 749       }
 750       break;
 751     default:
 752       if (!m->is_ignored_by_security_stack_walk()) {
 753         // We have reached the desired frame; return the holder class.
 754         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 755       }
 756       break;
 757     }
 758   }
 759   return NULL;
 760 JVM_END
 761 
 762 
 763 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 764   JVMWrapper("JVM_FindPrimitiveClass");
 765   oop mirror = NULL;
 766   BasicType t = name2type(utf);
 767   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY && t != T_VALUETYPE) {
 768     mirror = Universe::java_mirror(t);
 769   }
 770   if (mirror == NULL) {
 771     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 772   } else {
 773     return (jclass) JNIHandles::make_local(env, mirror);
 774   }
 775 JVM_END
 776 
 777 
 778 // Returns a class loaded by the bootstrap class loader; or null
 779 // if not found.  ClassNotFoundException is not thrown.
 780 // FindClassFromBootLoader is exported to the launcher for windows.
 781 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 782                                               const char* name))
 783   JVMWrapper("JVM_FindClassFromBootLoader");
 784 
 785   // Java libraries should ensure that name is never null...
 786   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 787     // It's impossible to create this class;  the name cannot fit
 788     // into the constant pool.
 789     return NULL;
 790   }
 791 
 792   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 793   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 794   if (k == NULL) {
 795     return NULL;
 796   }
 797 
 798   if (log_is_enabled(Debug, class, resolve)) {
 799     trace_class_resolution(k);
 800   }
 801   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 802 JVM_END
 803 
 804 // Find a class with this name in this loader, using the caller's protection domain.
 805 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
 806                                           jboolean init, jobject loader,
 807                                           jclass caller))
 808   JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
 809   // Java libraries should ensure that name is never null...
 810   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 811     // It's impossible to create this class;  the name cannot fit
 812     // into the constant pool.
 813     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 814   }
 815 
 816   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 817 
 818   oop loader_oop = JNIHandles::resolve(loader);
 819   oop from_class = JNIHandles::resolve(caller);
 820   oop protection_domain = NULL;
 821   // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
 822   // NPE. Put it in another way, the bootstrap class loader has all permission and
 823   // thus no checkPackageAccess equivalence in the VM class loader.
 824   // The caller is also passed as NULL by the java code if there is no security
 825   // manager to avoid the performance cost of getting the calling class.
 826   if (from_class != NULL && loader_oop != NULL) {
 827     protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
 828   }
 829 
 830   Handle h_loader(THREAD, loader_oop);
 831   Handle h_prot(THREAD, protection_domain);
 832   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 833                                                h_prot, false, THREAD);
 834 
 835   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 836     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 837   }
 838   return result;
 839 JVM_END
 840 
 841 // Currently only called from the old verifier.
 842 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 843                                          jboolean init, jclass from))
 844   JVMWrapper("JVM_FindClassFromClass");
 845   if (name == NULL) {
 846     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 847   }
 848   if ((int)strlen(name) > Symbol::max_length()) {
 849     // It's impossible to create this class;  the name cannot fit
 850     // into the constant pool.
 851     Exceptions::fthrow(THREAD_AND_LOCATION,
 852                        vmSymbols::java_lang_NoClassDefFoundError(),
 853                        "Class name exceeds maximum length of %d: %s",
 854                        Symbol::max_length(),
 855                        name);
 856     return 0;
 857   }
 858   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 859   oop from_class_oop = JNIHandles::resolve(from);
 860   Klass* from_class = (from_class_oop == NULL)
 861                            ? (Klass*)NULL
 862                            : java_lang_Class::as_Klass(from_class_oop);
 863   oop class_loader = NULL;
 864   oop protection_domain = NULL;
 865   if (from_class != NULL) {
 866     class_loader = from_class->class_loader();
 867     protection_domain = from_class->protection_domain();
 868   }
 869   Handle h_loader(THREAD, class_loader);
 870   Handle h_prot  (THREAD, protection_domain);
 871   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 872                                                h_prot, true, thread);
 873 
 874   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 875     // this function is generally only used for class loading during verification.
 876     ResourceMark rm;
 877     oop from_mirror = JNIHandles::resolve_non_null(from);
 878     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 879     const char * from_name = from_class->external_name();
 880 
 881     oop mirror = JNIHandles::resolve_non_null(result);
 882     Klass* to_class = java_lang_Class::as_Klass(mirror);
 883     const char * to = to_class->external_name();
 884     log_debug(class, resolve)("%s %s (verification)", from_name, to);
 885   }
 886 
 887   return result;
 888 JVM_END
 889 
 890 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 891   if (loader.is_null()) {
 892     return;
 893   }
 894 
 895   // check whether the current caller thread holds the lock or not.
 896   // If not, increment the corresponding counter
 897   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 898       ObjectSynchronizer::owner_self) {
 899     counter->inc();
 900   }
 901 }
 902 
 903 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 904 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 905                                       jobject loader, const jbyte *buf,
 906                                       jsize len, jobject pd, const char *source,
 907                                       TRAPS) {
 908   if (source == NULL)  source = "__JVM_DefineClass__";
 909 
 910   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 911   JavaThread* jt = (JavaThread*) THREAD;
 912 
 913   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 914                              ClassLoader::perf_define_appclass_selftime(),
 915                              ClassLoader::perf_define_appclasses(),
 916                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 917                              jt->get_thread_stat()->perf_timers_addr(),
 918                              PerfClassTraceTime::DEFINE_CLASS);
 919 
 920   if (UsePerfData) {
 921     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 922   }
 923 
 924   // Since exceptions can be thrown, class initialization can take place
 925   // if name is NULL no check for class name in .class stream has to be made.
 926   TempNewSymbol class_name = NULL;
 927   if (name != NULL) {
 928     const int str_len = (int)strlen(name);
 929     if (str_len > Symbol::max_length()) {
 930       // It's impossible to create this class;  the name cannot fit
 931       // into the constant pool.
 932       Exceptions::fthrow(THREAD_AND_LOCATION,
 933                          vmSymbols::java_lang_NoClassDefFoundError(),
 934                          "Class name exceeds maximum length of %d: %s",
 935                          Symbol::max_length(),
 936                          name);
 937       return 0;
 938     }
 939     class_name = SymbolTable::new_symbol(name, str_len);
 940   }
 941 
 942   ResourceMark rm(THREAD);
 943   ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
 944   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 945   if (UsePerfData) {
 946     is_lock_held_by_thread(class_loader,
 947                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
 948                            THREAD);
 949   }
 950   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 951   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 952                                                    class_loader,
 953                                                    protection_domain,
 954                                                    &st,
 955                                                    CHECK_NULL);
 956 
 957   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 958     trace_class_resolution(k);
 959   }
 960 
 961   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 962 }
 963 
 964 
 965 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
 966   JVMWrapper("JVM_DefineClass");
 967 
 968   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
 969 JVM_END
 970 
 971 
 972 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
 973   JVMWrapper("JVM_DefineClassWithSource");
 974 
 975   return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
 976 JVM_END
 977 
 978 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
 979   JVMWrapper("JVM_FindLoadedClass");
 980   ResourceMark rm(THREAD);
 981 
 982   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
 983   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
 984 
 985   const char* str   = java_lang_String::as_utf8_string(string());
 986   // Sanity check, don't expect null
 987   if (str == NULL) return NULL;
 988 
 989   const int str_len = (int)strlen(str);
 990   if (str_len > Symbol::max_length()) {
 991     // It's impossible to create this class;  the name cannot fit
 992     // into the constant pool.
 993     return NULL;
 994   }
 995   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
 996 
 997   // Security Note:
 998   //   The Java level wrapper will perform the necessary security check allowing
 999   //   us to pass the NULL as the initiating class loader.
1000   Handle h_loader(THREAD, JNIHandles::resolve(loader));
1001   if (UsePerfData) {
1002     is_lock_held_by_thread(h_loader,
1003                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1004                            THREAD);
1005   }
1006 
1007   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1008                                                               h_loader,
1009                                                               Handle(),
1010                                                               CHECK_NULL);
1011 #if INCLUDE_CDS
1012   if (k == NULL) {
1013     // If the class is not already loaded, try to see if it's in the shared
1014     // archive for the current classloader (h_loader).
1015     k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1016   }
1017 #endif
1018   return (k == NULL) ? NULL :
1019             (jclass) JNIHandles::make_local(env, k->java_mirror());
1020 JVM_END
1021 
1022 // Module support //////////////////////////////////////////////////////////////////////////////
1023 
1024 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1025                                  jstring location, const char* const* packages, jsize num_packages))
1026   JVMWrapper("JVM_DefineModule");
1027   Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1028 JVM_END
1029 
1030 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1031   JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1032   Modules::set_bootloader_unnamed_module(module, CHECK);
1033 JVM_END
1034 
1035 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1036   JVMWrapper("JVM_AddModuleExports");
1037   Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1038 JVM_END
1039 
1040 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1041   JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1042   Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1043 JVM_END
1044 
1045 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1046   JVMWrapper("JVM_AddModuleExportsToAll");
1047   Modules::add_module_exports(from_module, package, NULL, CHECK);
1048 JVM_END
1049 
1050 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1051   JVMWrapper("JVM_AddReadsModule");
1052   Modules::add_reads_module(from_module, source_module, CHECK);
1053 JVM_END
1054 
1055 // Reflection support //////////////////////////////////////////////////////////////////////////////
1056 
1057 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1058   assert (cls != NULL, "illegal class");
1059   JVMWrapper("JVM_InitClassName");
1060   JvmtiVMObjectAllocEventCollector oam;
1061   ResourceMark rm(THREAD);
1062   HandleMark hm(THREAD);
1063   Handle java_class(THREAD, JNIHandles::resolve(cls));
1064   oop result = java_lang_Class::name(java_class, CHECK_NULL);
1065   return (jstring) JNIHandles::make_local(env, result);
1066 JVM_END
1067 
1068 
1069 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1070   JVMWrapper("JVM_GetClassInterfaces");
1071   JvmtiVMObjectAllocEventCollector oam;
1072   oop mirror = JNIHandles::resolve_non_null(cls);
1073 
1074   // Special handling for primitive objects
1075   if (java_lang_Class::is_primitive(mirror)) {
1076     // Primitive objects does not have any interfaces
1077     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1078     return (jobjectArray) JNIHandles::make_local(env, r);
1079   }
1080 
1081   Klass* klass = java_lang_Class::as_Klass(mirror);
1082   // Figure size of result array
1083   int size;
1084   if (klass->is_instance_klass()) {
1085     size = InstanceKlass::cast(klass)->local_interfaces()->length();
1086   } else {
1087     assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1088     size = 2;
1089   }
1090 
1091   // Allocate result array
1092   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1093   objArrayHandle result (THREAD, r);
1094   // Fill in result
1095   if (klass->is_instance_klass()) {
1096     // Regular instance klass, fill in all local interfaces
1097     for (int index = 0; index < size; index++) {
1098       Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1099       result->obj_at_put(index, k->java_mirror());
1100     }
1101   } else {
1102     // All arrays implement java.lang.Cloneable and java.io.Serializable
1103     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1104     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1105   }
1106   return (jobjectArray) JNIHandles::make_local(env, result());
1107 JVM_END
1108 
1109 
1110 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1111   JVMWrapper("JVM_IsInterface");
1112   oop mirror = JNIHandles::resolve_non_null(cls);
1113   if (java_lang_Class::is_primitive(mirror)) {
1114     return JNI_FALSE;
1115   }
1116   Klass* k = java_lang_Class::as_Klass(mirror);
1117   jboolean result = k->is_interface();
1118   assert(!result || k->is_instance_klass(),
1119          "all interfaces are instance types");
1120   // The compiler intrinsic for isInterface tests the
1121   // Klass::_access_flags bits in the same way.
1122   return result;
1123 JVM_END
1124 
1125 
1126 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1127   JVMWrapper("JVM_GetClassSigners");
1128   JvmtiVMObjectAllocEventCollector oam;
1129   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1130     // There are no signers for primitive types
1131     return NULL;
1132   }
1133 
1134   objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1135 
1136   // If there are no signers set in the class, or if the class
1137   // is an array, return NULL.
1138   if (signers == NULL) return NULL;
1139 
1140   // copy of the signers array
1141   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1142   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1143   for (int index = 0; index < signers->length(); index++) {
1144     signers_copy->obj_at_put(index, signers->obj_at(index));
1145   }
1146 
1147   // return the copy
1148   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1149 JVM_END
1150 
1151 
1152 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1153   JVMWrapper("JVM_SetClassSigners");
1154   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1155     // This call is ignored for primitive types and arrays.
1156     // Signers are only set once, ClassLoader.java, and thus shouldn't
1157     // be called with an array.  Only the bootstrap loader creates arrays.
1158     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1159     if (k->is_instance_klass()) {
1160       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1161     }
1162   }
1163 JVM_END
1164 
1165 
1166 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1167   JVMWrapper("JVM_GetProtectionDomain");
1168   if (JNIHandles::resolve(cls) == NULL) {
1169     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1170   }
1171 
1172   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1173     // Primitive types does not have a protection domain.
1174     return NULL;
1175   }
1176 
1177   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1178   return (jobject) JNIHandles::make_local(env, pd);
1179 JVM_END
1180 
1181 
1182 // Returns the inherited_access_control_context field of the running thread.
1183 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1184   JVMWrapper("JVM_GetInheritedAccessControlContext");
1185   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1186   return JNIHandles::make_local(env, result);
1187 JVM_END
1188 
1189 class RegisterArrayForGC {
1190  private:
1191   JavaThread *_thread;
1192  public:
1193   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1194     _thread = thread;
1195     _thread->register_array_for_gc(array);
1196   }
1197 
1198   ~RegisterArrayForGC() {
1199     _thread->register_array_for_gc(NULL);
1200   }
1201 };
1202 
1203 
1204 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1205   JVMWrapper("JVM_GetStackAccessControlContext");
1206   if (!UsePrivilegedStack) return NULL;
1207 
1208   ResourceMark rm(THREAD);
1209   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1210   JvmtiVMObjectAllocEventCollector oam;
1211 
1212   // count the protection domains on the execution stack. We collapse
1213   // duplicate consecutive protection domains into a single one, as
1214   // well as stopping when we hit a privileged frame.
1215 
1216   oop previous_protection_domain = NULL;
1217   Handle privileged_context(thread, NULL);
1218   bool is_privileged = false;
1219   oop protection_domain = NULL;
1220 
1221   // Iterate through Java frames
1222   vframeStream vfst(thread);
1223   for(; !vfst.at_end(); vfst.next()) {
1224     // get method of frame
1225     Method* method = vfst.method();
1226 
1227     // stop at the first privileged frame
1228     if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1229       method->name() == vmSymbols::executePrivileged_name())
1230     {
1231       // this frame is privileged
1232       is_privileged = true;
1233 
1234       javaVFrame *priv = vfst.asJavaVFrame();       // executePrivileged
1235 
1236       StackValueCollection* locals = priv->locals();
1237       StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1238       StackValue* clr_sv = locals->at(2); // Class<?> caller
1239       assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1240       assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1241       privileged_context    = ctx_sv->get_obj();
1242       Handle caller         = clr_sv->get_obj();
1243 
1244       Klass *caller_klass = java_lang_Class::as_Klass(caller());
1245       protection_domain  = caller_klass->protection_domain();
1246     } else {
1247       protection_domain = method->method_holder()->protection_domain();
1248     }
1249 
1250     if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1251       local_array->push(protection_domain);
1252       previous_protection_domain = protection_domain;
1253     }
1254 
1255     if (is_privileged) break;
1256   }
1257 
1258 
1259   // either all the domains on the stack were system domains, or
1260   // we had a privileged system domain
1261   if (local_array->is_empty()) {
1262     if (is_privileged && privileged_context.is_null()) return NULL;
1263 
1264     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1265     return JNIHandles::make_local(env, result);
1266   }
1267 
1268   // the resource area must be registered in case of a gc
1269   RegisterArrayForGC ragc(thread, local_array);
1270   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1271                                                  local_array->length(), CHECK_NULL);
1272   objArrayHandle h_context(thread, context);
1273   for (int index = 0; index < local_array->length(); index++) {
1274     h_context->obj_at_put(index, local_array->at(index));
1275   }
1276 
1277   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1278 
1279   return JNIHandles::make_local(env, result);
1280 JVM_END
1281 
1282 
1283 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1284   JVMWrapper("JVM_IsArrayClass");
1285   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1286   return (k != NULL) && k->is_array_klass() ? true : false;
1287 JVM_END
1288 
1289 
1290 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1291   JVMWrapper("JVM_IsPrimitiveClass");
1292   oop mirror = JNIHandles::resolve_non_null(cls);
1293   return (jboolean) java_lang_Class::is_primitive(mirror);
1294 JVM_END
1295 
1296 
1297 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1298   JVMWrapper("JVM_GetClassModifiers");
1299   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1300     // Primitive type
1301     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1302   }
1303 
1304   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1305   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1306   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1307   return k->modifier_flags();
1308 JVM_END
1309 
1310 
1311 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1312 
1313 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1314   JvmtiVMObjectAllocEventCollector oam;
1315   // ofClass is a reference to a java_lang_Class object. The mirror object
1316   // of an InstanceKlass
1317 
1318   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1319       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1320     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1321     return (jobjectArray)JNIHandles::make_local(env, result);
1322   }
1323 
1324   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1325   InnerClassesIterator iter(k);
1326 
1327   if (iter.length() == 0) {
1328     // Neither an inner nor outer class
1329     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1330     return (jobjectArray)JNIHandles::make_local(env, result);
1331   }
1332 
1333   // find inner class info
1334   constantPoolHandle cp(thread, k->constants());
1335   int length = iter.length();
1336 
1337   // Allocate temp. result array
1338   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1339   objArrayHandle result (THREAD, r);
1340   int members = 0;
1341 
1342   for (; !iter.done(); iter.next()) {
1343     int ioff = iter.inner_class_info_index();
1344     int ooff = iter.outer_class_info_index();
1345 
1346     if (ioff != 0 && ooff != 0) {
1347       // Check to see if the name matches the class we're looking for
1348       // before attempting to find the class.
1349       if (cp->klass_name_at_matches(k, ooff)) {
1350         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1351         if (outer_klass == k) {
1352            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1353            InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1354 
1355            // Throws an exception if outer klass has not declared k as
1356            // an inner klass
1357            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1358 
1359            result->obj_at_put(members, inner_klass->java_mirror());
1360            members++;
1361         }
1362       }
1363     }
1364   }
1365 
1366   if (members != length) {
1367     // Return array of right length
1368     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1369     for(int i = 0; i < members; i++) {
1370       res->obj_at_put(i, result->obj_at(i));
1371     }
1372     return (jobjectArray)JNIHandles::make_local(env, res);
1373   }
1374 
1375   return (jobjectArray)JNIHandles::make_local(env, result());
1376 JVM_END
1377 
1378 
1379 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1380 {
1381   // ofClass is a reference to a java_lang_Class object.
1382   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1383       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1384     return NULL;
1385   }
1386 
1387   bool inner_is_member = false;
1388   Klass* outer_klass
1389     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1390                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1391   if (outer_klass == NULL)  return NULL;  // already a top-level class
1392   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1393   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1394 }
1395 JVM_END
1396 
1397 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1398 {
1399   oop mirror = JNIHandles::resolve_non_null(cls);
1400   if (java_lang_Class::is_primitive(mirror) ||
1401       !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1402     return NULL;
1403   }
1404   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1405   int ooff = 0, noff = 0;
1406   if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1407     if (noff != 0) {
1408       constantPoolHandle i_cp(thread, k->constants());
1409       Symbol* name = i_cp->symbol_at(noff);
1410       Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1411       return (jstring) JNIHandles::make_local(env, str());
1412     }
1413   }
1414   return NULL;
1415 }
1416 JVM_END
1417 
1418 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1419   assert (cls != NULL, "illegal class");
1420   JVMWrapper("JVM_GetClassSignature");
1421   JvmtiVMObjectAllocEventCollector oam;
1422   ResourceMark rm(THREAD);
1423   // Return null for arrays and primatives
1424   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1425     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1426     if (k->is_instance_klass()) {
1427       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1428       if (sym == NULL) return NULL;
1429       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1430       return (jstring) JNIHandles::make_local(env, str());
1431     }
1432   }
1433   return NULL;
1434 JVM_END
1435 
1436 
1437 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1438   assert (cls != NULL, "illegal class");
1439   JVMWrapper("JVM_GetClassAnnotations");
1440 
1441   // Return null for arrays and primitives
1442   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1443     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1444     if (k->is_instance_klass()) {
1445       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1446       return (jbyteArray) JNIHandles::make_local(env, a);
1447     }
1448   }
1449   return NULL;
1450 JVM_END
1451 
1452 
1453 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1454   // some of this code was adapted from from jni_FromReflectedField
1455 
1456   oop reflected = JNIHandles::resolve_non_null(field);
1457   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1458   Klass* k    = java_lang_Class::as_Klass(mirror);
1459   int slot      = java_lang_reflect_Field::slot(reflected);
1460   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1461 
1462   InstanceKlass* ik = InstanceKlass::cast(k);
1463   intptr_t offset = ik->field_offset(slot);
1464 
1465   if (modifiers & JVM_ACC_STATIC) {
1466     // for static fields we only look in the current class
1467     if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1468       assert(false, "cannot find static field");
1469       return false;
1470     }
1471   } else {
1472     // for instance fields we start with the current class and work
1473     // our way up through the superclass chain
1474     if (!ik->find_field_from_offset(offset, false, &fd)) {
1475       assert(false, "cannot find instance field");
1476       return false;
1477     }
1478   }
1479   return true;
1480 }
1481 
1482 static Method* jvm_get_method_common(jobject method) {
1483   // some of this code was adapted from from jni_FromReflectedMethod
1484 
1485   oop reflected = JNIHandles::resolve_non_null(method);
1486   oop mirror    = NULL;
1487   int slot      = 0;
1488 
1489   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1490     mirror = java_lang_reflect_Constructor::clazz(reflected);
1491     slot   = java_lang_reflect_Constructor::slot(reflected);
1492   } else {
1493     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1494            "wrong type");
1495     mirror = java_lang_reflect_Method::clazz(reflected);
1496     slot   = java_lang_reflect_Method::slot(reflected);
1497   }
1498   Klass* k = java_lang_Class::as_Klass(mirror);
1499 
1500   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1501   assert(m != NULL, "cannot find method");
1502   return m;  // caller has to deal with NULL in product mode
1503 }
1504 
1505 /* Type use annotations support (JDK 1.8) */
1506 
1507 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1508   assert (cls != NULL, "illegal class");
1509   JVMWrapper("JVM_GetClassTypeAnnotations");
1510   ResourceMark rm(THREAD);
1511   // Return null for arrays and primitives
1512   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1513     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1514     if (k->is_instance_klass()) {
1515       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1516       if (type_annotations != NULL) {
1517         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1518         return (jbyteArray) JNIHandles::make_local(env, a);
1519       }
1520     }
1521   }
1522   return NULL;
1523 JVM_END
1524 
1525 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1526   assert (method != NULL, "illegal method");
1527   JVMWrapper("JVM_GetMethodTypeAnnotations");
1528 
1529   // method is a handle to a java.lang.reflect.Method object
1530   Method* m = jvm_get_method_common(method);
1531   if (m == NULL) {
1532     return NULL;
1533   }
1534 
1535   AnnotationArray* type_annotations = m->type_annotations();
1536   if (type_annotations != NULL) {
1537     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1538     return (jbyteArray) JNIHandles::make_local(env, a);
1539   }
1540 
1541   return NULL;
1542 JVM_END
1543 
1544 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1545   assert (field != NULL, "illegal field");
1546   JVMWrapper("JVM_GetFieldTypeAnnotations");
1547 
1548   fieldDescriptor fd;
1549   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1550   if (!gotFd) {
1551     return NULL;
1552   }
1553 
1554   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1555 JVM_END
1556 
1557 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1558   if (!cp->is_within_bounds(index)) {
1559     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1560   }
1561 }
1562 
1563 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1564 {
1565   JVMWrapper("JVM_GetMethodParameters");
1566   // method is a handle to a java.lang.reflect.Method object
1567   Method* method_ptr = jvm_get_method_common(method);
1568   methodHandle mh (THREAD, method_ptr);
1569   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1570   const int num_params = mh->method_parameters_length();
1571 
1572   if (num_params < 0) {
1573     // A -1 return value from method_parameters_length means there is no
1574     // parameter data.  Return null to indicate this to the reflection
1575     // API.
1576     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1577     return (jobjectArray)NULL;
1578   } else {
1579     // Otherwise, we return something up to reflection, even if it is
1580     // a zero-length array.  Why?  Because in some cases this can
1581     // trigger a MalformedParametersException.
1582 
1583     // make sure all the symbols are properly formatted
1584     for (int i = 0; i < num_params; i++) {
1585       MethodParametersElement* params = mh->method_parameters_start();
1586       int index = params[i].name_cp_index;
1587       bounds_check(mh->constants(), index, CHECK_NULL);
1588 
1589       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1590         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1591                     "Wrong type at constant pool index");
1592       }
1593 
1594     }
1595 
1596     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1597     objArrayHandle result (THREAD, result_oop);
1598 
1599     for (int i = 0; i < num_params; i++) {
1600       MethodParametersElement* params = mh->method_parameters_start();
1601       // For a 0 index, give a NULL symbol
1602       Symbol* sym = 0 != params[i].name_cp_index ?
1603         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1604       int flags = params[i].flags;
1605       oop param = Reflection::new_parameter(reflected_method, i, sym,
1606                                             flags, CHECK_NULL);
1607       result->obj_at_put(i, param);
1608     }
1609     return (jobjectArray)JNIHandles::make_local(env, result());
1610   }
1611 }
1612 JVM_END
1613 
1614 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1615 
1616 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1617 {
1618   JVMWrapper("JVM_GetClassDeclaredFields");
1619   JvmtiVMObjectAllocEventCollector oam;
1620 
1621   // Exclude primitive types and array types
1622   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1623       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1624     // Return empty array
1625     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1626     return (jobjectArray) JNIHandles::make_local(env, res);
1627   }
1628 
1629   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1630   constantPoolHandle cp(THREAD, k->constants());
1631 
1632   // Ensure class is linked
1633   k->link_class(CHECK_NULL);
1634 
1635   // Allocate result
1636   int num_fields;
1637 
1638   if (publicOnly) {
1639     num_fields = 0;
1640     for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1641       if (fs.access_flags().is_public()) ++num_fields;
1642     }
1643   } else {
1644     num_fields = k->java_fields_count();
1645   }
1646 
1647   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1648   objArrayHandle result (THREAD, r);
1649 
1650   int out_idx = 0;
1651   fieldDescriptor fd;
1652   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1653     if (!publicOnly || fs.access_flags().is_public()) {
1654       fd.reinitialize(k, fs.index());
1655       oop field = Reflection::new_field(&fd, CHECK_NULL);
1656       result->obj_at_put(out_idx, field);
1657       ++out_idx;
1658     }
1659   }
1660   assert(out_idx == num_fields, "just checking");
1661   return (jobjectArray) JNIHandles::make_local(env, result());
1662 }
1663 JVM_END
1664 
1665 static bool select_method(const methodHandle& method, bool want_constructor) {
1666   bool is_ctor = (method->is_object_constructor() ||
1667                   method->is_static_init_factory());
1668   if (want_constructor) {
1669     return is_ctor;
1670   } else {
1671     return (!is_ctor &&
1672             !method->is_class_initializer() &&
1673             !method->is_overpass());
1674   }
1675 }
1676 
1677 static jobjectArray get_class_declared_methods_helper(
1678                                   JNIEnv *env,
1679                                   jclass ofClass, jboolean publicOnly,
1680                                   bool want_constructor,
1681                                   Klass* klass, TRAPS) {
1682 
1683   JvmtiVMObjectAllocEventCollector oam;
1684 
1685   // Exclude primitive types and array types
1686   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1687       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1688     // Return empty array
1689     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1690     return (jobjectArray) JNIHandles::make_local(env, res);
1691   }
1692 
1693   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1694 
1695   // Ensure class is linked
1696   k->link_class(CHECK_NULL);
1697 
1698   Array<Method*>* methods = k->methods();
1699   int methods_length = methods->length();
1700 
1701   // Save original method_idnum in case of redefinition, which can change
1702   // the idnum of obsolete methods.  The new method will have the same idnum
1703   // but if we refresh the methods array, the counts will be wrong.
1704   ResourceMark rm(THREAD);
1705   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1706   int num_methods = 0;
1707 
1708   for (int i = 0; i < methods_length; i++) {
1709     methodHandle method(THREAD, methods->at(i));
1710     if (select_method(method, want_constructor)) {
1711       if (!publicOnly || method->is_public()) {
1712         idnums->push(method->method_idnum());
1713         ++num_methods;
1714       }
1715     }
1716   }
1717 
1718   // Allocate result
1719   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1720   objArrayHandle result (THREAD, r);
1721 
1722   // Now just put the methods that we selected above, but go by their idnum
1723   // in case of redefinition.  The methods can be redefined at any safepoint,
1724   // so above when allocating the oop array and below when creating reflect
1725   // objects.
1726   for (int i = 0; i < num_methods; i++) {
1727     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1728     if (method.is_null()) {
1729       // Method may have been deleted and seems this API can handle null
1730       // Otherwise should probably put a method that throws NSME
1731       result->obj_at_put(i, NULL);
1732     } else {
1733       oop m;
1734       if (want_constructor) {
1735         assert(method->is_object_constructor() ||
1736                method->is_static_init_factory(), "must be");
1737         m = Reflection::new_constructor(method, CHECK_NULL);
1738       } else {
1739         m = Reflection::new_method(method, false, CHECK_NULL);
1740       }
1741       result->obj_at_put(i, m);
1742     }
1743   }
1744 
1745   return (jobjectArray) JNIHandles::make_local(env, result());
1746 }
1747 
1748 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1749 {
1750   JVMWrapper("JVM_GetClassDeclaredMethods");
1751   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1752                                            /*want_constructor*/ false,
1753                                            SystemDictionary::reflect_Method_klass(), THREAD);
1754 }
1755 JVM_END
1756 
1757 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1758 {
1759   JVMWrapper("JVM_GetClassDeclaredConstructors");
1760   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1761                                            /*want_constructor*/ true,
1762                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
1763 }
1764 JVM_END
1765 
1766 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1767 {
1768   JVMWrapper("JVM_GetClassAccessFlags");
1769   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1770     // Primitive type
1771     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1772   }
1773 
1774   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1775   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1776 }
1777 JVM_END
1778 
1779 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1780 {
1781   JVMWrapper("JVM_AreNestMates");
1782   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1783   assert(c->is_instance_klass(), "must be");
1784   InstanceKlass* ck = InstanceKlass::cast(c);
1785   Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1786   assert(m->is_instance_klass(), "must be");
1787   InstanceKlass* mk = InstanceKlass::cast(m);
1788   return ck->has_nestmate_access_to(mk, THREAD);
1789 }
1790 JVM_END
1791 
1792 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1793 {
1794   // current is not a primitive or array class
1795   JVMWrapper("JVM_GetNestHost");
1796   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1797   assert(c->is_instance_klass(), "must be");
1798   InstanceKlass* ck = InstanceKlass::cast(c);
1799   // Don't post exceptions if validation fails
1800   InstanceKlass* host = ck->nest_host(NULL, THREAD);
1801   return (jclass) (host == NULL ? NULL :
1802                    JNIHandles::make_local(THREAD, host->java_mirror()));
1803 }
1804 JVM_END
1805 
1806 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1807 {
1808   // current is not a primitive or array class
1809   JVMWrapper("JVM_GetNestMembers");
1810   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1811   assert(c->is_instance_klass(), "must be");
1812   InstanceKlass* ck = InstanceKlass::cast(c);
1813   // Get the nest host for this nest - throw ICCE if validation fails
1814   Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1815   InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1816 
1817   {
1818     JvmtiVMObjectAllocEventCollector oam;
1819     Array<u2>* members = host->nest_members();
1820     int length = members == NULL ? 0 : members->length();
1821     // nest host is first in the array so make it one bigger
1822     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1823                                              length + 1, CHECK_NULL);
1824     objArrayHandle result (THREAD, r);
1825     result->obj_at_put(0, host->java_mirror());
1826     if (length != 0) {
1827       int i;
1828       for (i = 0; i < length; i++) {
1829          int cp_index = members->at(i);
1830          Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1831          if (k->is_instance_klass()) {
1832            InstanceKlass* nest_host_k =
1833              InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1834            if (nest_host_k == host) {
1835              result->obj_at_put(i+1, k->java_mirror());
1836            }
1837            else {
1838              // k's nest host is legal but it isn't our host so
1839              // throw ICCE
1840              ResourceMark rm(THREAD);
1841              Exceptions::fthrow(THREAD_AND_LOCATION,
1842                                 icce,
1843                                 "Nest member %s in %s declares a different nest host of %s",
1844                                 k->external_name(),
1845                                 host->external_name(),
1846                                 nest_host_k->external_name()
1847                            );
1848              return NULL;
1849            }
1850          }
1851          else {
1852            // we have a bad nest member entry - throw ICCE
1853            ResourceMark rm(THREAD);
1854            Exceptions::fthrow(THREAD_AND_LOCATION,
1855                               icce,
1856                               "Class %s can not be a nest member of %s",
1857                               k->external_name(),
1858                               host->external_name()
1859                               );
1860            return NULL;
1861          }
1862       }
1863     }
1864     else {
1865       assert(host == ck, "must be singleton nest");
1866     }
1867     return (jobjectArray)JNIHandles::make_local(THREAD, result());
1868   }
1869 }
1870 JVM_END
1871 
1872 // Constant pool access //////////////////////////////////////////////////////////
1873 
1874 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1875 {
1876   JVMWrapper("JVM_GetClassConstantPool");
1877   JvmtiVMObjectAllocEventCollector oam;
1878 
1879   // Return null for primitives and arrays
1880   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1881     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1882     if (k->is_instance_klass()) {
1883       InstanceKlass* k_h = InstanceKlass::cast(k);
1884       Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1885       reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1886       return JNIHandles::make_local(jcp());
1887     }
1888   }
1889   return NULL;
1890 }
1891 JVM_END
1892 
1893 
1894 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1895 {
1896   JVMWrapper("JVM_ConstantPoolGetSize");
1897   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1898   return cp->length();
1899 }
1900 JVM_END
1901 
1902 
1903 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1904 {
1905   JVMWrapper("JVM_ConstantPoolGetClassAt");
1906   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1907   bounds_check(cp, index, CHECK_NULL);
1908   constantTag tag = cp->tag_at(index);
1909   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1910     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1911   }
1912   Klass* k = cp->klass_at(index, CHECK_NULL);
1913   return (jclass) JNIHandles::make_local(k->java_mirror());
1914 }
1915 JVM_END
1916 
1917 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1918 {
1919   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1920   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1921   bounds_check(cp, index, CHECK_NULL);
1922   constantTag tag = cp->tag_at(index);
1923   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1924     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1925   }
1926   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1927   if (k == NULL) return NULL;
1928   return (jclass) JNIHandles::make_local(k->java_mirror());
1929 }
1930 JVM_END
1931 
1932 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1933   constantTag tag = cp->tag_at(index);
1934   if (!tag.is_method() && !tag.is_interface_method()) {
1935     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1936   }
1937   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1938   Klass* k_o;
1939   if (force_resolution) {
1940     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1941   } else {
1942     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1943     if (k_o == NULL) return NULL;
1944   }
1945   InstanceKlass* k = InstanceKlass::cast(k_o);
1946   Symbol* name = cp->uncached_name_ref_at(index);
1947   Symbol* sig  = cp->uncached_signature_ref_at(index);
1948   methodHandle m (THREAD, k->find_method(name, sig));
1949   if (m.is_null()) {
1950     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1951   }
1952   oop method;
1953   if (m->is_object_constructor()) {
1954     method = Reflection::new_constructor(m, CHECK_NULL);
1955   } else {
1956     method = Reflection::new_method(m, true, CHECK_NULL);
1957   }
1958   return JNIHandles::make_local(method);
1959 }
1960 
1961 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1962 {
1963   JVMWrapper("JVM_ConstantPoolGetMethodAt");
1964   JvmtiVMObjectAllocEventCollector oam;
1965   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1966   bounds_check(cp, index, CHECK_NULL);
1967   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1968   return res;
1969 }
1970 JVM_END
1971 
1972 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1973 {
1974   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1975   JvmtiVMObjectAllocEventCollector oam;
1976   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1977   bounds_check(cp, index, CHECK_NULL);
1978   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1979   return res;
1980 }
1981 JVM_END
1982 
1983 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1984   constantTag tag = cp->tag_at(index);
1985   if (!tag.is_field()) {
1986     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1987   }
1988   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1989   Klass* k_o;
1990   if (force_resolution) {
1991     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1992   } else {
1993     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1994     if (k_o == NULL) return NULL;
1995   }
1996   InstanceKlass* k = InstanceKlass::cast(k_o);
1997   Symbol* name = cp->uncached_name_ref_at(index);
1998   Symbol* sig  = cp->uncached_signature_ref_at(index);
1999   fieldDescriptor fd;
2000   Klass* target_klass = k->find_field(name, sig, &fd);
2001   if (target_klass == NULL) {
2002     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2003   }
2004   oop field = Reflection::new_field(&fd, CHECK_NULL);
2005   return JNIHandles::make_local(field);
2006 }
2007 
2008 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2009 {
2010   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2011   JvmtiVMObjectAllocEventCollector oam;
2012   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2013   bounds_check(cp, index, CHECK_NULL);
2014   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2015   return res;
2016 }
2017 JVM_END
2018 
2019 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2020 {
2021   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2022   JvmtiVMObjectAllocEventCollector oam;
2023   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2024   bounds_check(cp, index, CHECK_NULL);
2025   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2026   return res;
2027 }
2028 JVM_END
2029 
2030 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2031 {
2032   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2033   JvmtiVMObjectAllocEventCollector oam;
2034   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2035   bounds_check(cp, index, CHECK_NULL);
2036   constantTag tag = cp->tag_at(index);
2037   if (!tag.is_field_or_method()) {
2038     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2039   }
2040   int klass_ref = cp->uncached_klass_ref_index_at(index);
2041   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2042   Symbol*  member_name = cp->uncached_name_ref_at(index);
2043   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2044   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2045   objArrayHandle dest(THREAD, dest_o);
2046   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2047   dest->obj_at_put(0, str());
2048   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2049   dest->obj_at_put(1, str());
2050   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2051   dest->obj_at_put(2, str());
2052   return (jobjectArray) JNIHandles::make_local(dest());
2053 }
2054 JVM_END
2055 
2056 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2057 {
2058   JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2059   JvmtiVMObjectAllocEventCollector oam;
2060   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2061   bounds_check(cp, index, CHECK_0);
2062   constantTag tag = cp->tag_at(index);
2063   if (!tag.is_field_or_method()) {
2064     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2065   }
2066   return (jint) cp->uncached_klass_ref_index_at(index);
2067 }
2068 JVM_END
2069 
2070 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2071 {
2072   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2073   JvmtiVMObjectAllocEventCollector oam;
2074   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2075   bounds_check(cp, index, CHECK_0);
2076   constantTag tag = cp->tag_at(index);
2077   if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2078     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2079   }
2080   return (jint) cp->uncached_name_and_type_ref_index_at(index);
2081 }
2082 JVM_END
2083 
2084 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2085 {
2086   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2087   JvmtiVMObjectAllocEventCollector oam;
2088   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2089   bounds_check(cp, index, CHECK_NULL);
2090   constantTag tag = cp->tag_at(index);
2091   if (!tag.is_name_and_type()) {
2092     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2093   }
2094   Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2095   Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2096   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2097   objArrayHandle dest(THREAD, dest_o);
2098   Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2099   dest->obj_at_put(0, str());
2100   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2101   dest->obj_at_put(1, str());
2102   return (jobjectArray) JNIHandles::make_local(dest());
2103 }
2104 JVM_END
2105 
2106 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2107 {
2108   JVMWrapper("JVM_ConstantPoolGetIntAt");
2109   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2110   bounds_check(cp, index, CHECK_0);
2111   constantTag tag = cp->tag_at(index);
2112   if (!tag.is_int()) {
2113     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2114   }
2115   return cp->int_at(index);
2116 }
2117 JVM_END
2118 
2119 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2120 {
2121   JVMWrapper("JVM_ConstantPoolGetLongAt");
2122   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2123   bounds_check(cp, index, CHECK_(0L));
2124   constantTag tag = cp->tag_at(index);
2125   if (!tag.is_long()) {
2126     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2127   }
2128   return cp->long_at(index);
2129 }
2130 JVM_END
2131 
2132 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2133 {
2134   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2135   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2136   bounds_check(cp, index, CHECK_(0.0f));
2137   constantTag tag = cp->tag_at(index);
2138   if (!tag.is_float()) {
2139     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2140   }
2141   return cp->float_at(index);
2142 }
2143 JVM_END
2144 
2145 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2146 {
2147   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2148   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2149   bounds_check(cp, index, CHECK_(0.0));
2150   constantTag tag = cp->tag_at(index);
2151   if (!tag.is_double()) {
2152     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2153   }
2154   return cp->double_at(index);
2155 }
2156 JVM_END
2157 
2158 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2159 {
2160   JVMWrapper("JVM_ConstantPoolGetStringAt");
2161   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2162   bounds_check(cp, index, CHECK_NULL);
2163   constantTag tag = cp->tag_at(index);
2164   if (!tag.is_string()) {
2165     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2166   }
2167   oop str = cp->string_at(index, CHECK_NULL);
2168   return (jstring) JNIHandles::make_local(str);
2169 }
2170 JVM_END
2171 
2172 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2173 {
2174   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2175   JvmtiVMObjectAllocEventCollector oam;
2176   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2177   bounds_check(cp, index, CHECK_NULL);
2178   constantTag tag = cp->tag_at(index);
2179   if (!tag.is_symbol()) {
2180     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2181   }
2182   Symbol* sym = cp->symbol_at(index);
2183   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2184   return (jstring) JNIHandles::make_local(str());
2185 }
2186 JVM_END
2187 
2188 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2189 {
2190   JVMWrapper("JVM_ConstantPoolGetTagAt");
2191   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2192   bounds_check(cp, index, CHECK_0);
2193   constantTag tag = cp->tag_at(index);
2194   jbyte result = tag.value();
2195   // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2196   // they are changed to the corresponding tags from the JVM spec, so that java code in
2197   // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2198   if (tag.is_klass_or_reference()) {
2199       result = JVM_CONSTANT_Class;
2200   } else if (tag.is_string_index()) {
2201       result = JVM_CONSTANT_String;
2202   } else if (tag.is_method_type_in_error()) {
2203       result = JVM_CONSTANT_MethodType;
2204   } else if (tag.is_method_handle_in_error()) {
2205       result = JVM_CONSTANT_MethodHandle;
2206   } else if (tag.is_dynamic_constant_in_error()) {
2207       result = JVM_CONSTANT_Dynamic;
2208   }
2209   return result;
2210 }
2211 JVM_END
2212 
2213 // Assertion support. //////////////////////////////////////////////////////////
2214 
2215 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2216   JVMWrapper("JVM_DesiredAssertionStatus");
2217   assert(cls != NULL, "bad class");
2218 
2219   oop r = JNIHandles::resolve(cls);
2220   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2221   if (java_lang_Class::is_primitive(r)) return false;
2222 
2223   Klass* k = java_lang_Class::as_Klass(r);
2224   assert(k->is_instance_klass(), "must be an instance klass");
2225   if (!k->is_instance_klass()) return false;
2226 
2227   ResourceMark rm(THREAD);
2228   const char* name = k->name()->as_C_string();
2229   bool system_class = k->class_loader() == NULL;
2230   return JavaAssertions::enabled(name, system_class);
2231 
2232 JVM_END
2233 
2234 
2235 // Return a new AssertionStatusDirectives object with the fields filled in with
2236 // command-line assertion arguments (i.e., -ea, -da).
2237 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2238   JVMWrapper("JVM_AssertionStatusDirectives");
2239   JvmtiVMObjectAllocEventCollector oam;
2240   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2241   return JNIHandles::make_local(env, asd);
2242 JVM_END
2243 
2244 // Arrays support /////////////////////////////////////////////////////////////
2245 
2246 JVM_ENTRY(jboolean, JVM_ArrayIsAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2247   JVMWrapper("JVM_ArrayIsAccessAtomic");
2248   oop o = JNIHandles::resolve(array);
2249   Klass* k = o->klass();
2250   if ((o == NULL) || (!k->is_array_klass())) {
2251     THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2252   }
2253   if (k->is_valueArray_klass()) {
2254     return ValueArrayKlass::cast(k)->is_atomic();
2255   }
2256   return true;
2257 JVM_END
2258 
2259 JVM_ENTRY(jobject, JVM_ArrayEnsureAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2260   JVMWrapper("JVM_ArrayEnsureAccessAtomic");
2261   oop o = JNIHandles::resolve(array);
2262   Klass* k = o->klass();
2263   if ((o == NULL) || (!k->is_array_klass())) {
2264     THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2265   }
2266   if (k->is_valueArray_klass()) {
2267     ValueArrayKlass* vk = ValueArrayKlass::cast(k);
2268     if (!vk->is_atomic()) {
2269       /**
2270        * Need to decide how to implement:
2271        *
2272        * 1) Change to objArrayOop layout, therefore oop->klass() differs so
2273        * then "<atomic>[Qfoo;" klass needs to subclass "[Qfoo;" to pass through
2274        * "checkcast" & "instanceof"
2275        *
2276        * 2) Use extra header in the valueArrayOop to flag atomicity required and
2277        * possibly per instance lock structure. Said info, could be placed in
2278        * "trailer" rather than disturb the current arrayOop
2279        */
2280       Unimplemented();
2281     }
2282   }
2283   return array;
2284 JVM_END
2285 
2286 // Verification ////////////////////////////////////////////////////////////////////////////////
2287 
2288 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2289 
2290 // RedefineClasses support: bug 6214132 caused verification to fail.
2291 // All functions from this section should call the jvmtiThreadSate function:
2292 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2293 // The function returns a Klass* of the _scratch_class if the verifier
2294 // was invoked in the middle of the class redefinition.
2295 // Otherwise it returns its argument value which is the _the_class Klass*.
2296 // Please, refer to the description in the jvmtiThreadSate.hpp.
2297 
2298 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2299   JVMWrapper("JVM_GetClassNameUTF");
2300   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2301   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2302   return k->name()->as_utf8();
2303 JVM_END
2304 
2305 
2306 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2307   JVMWrapper("JVM_GetClassCPTypes");
2308   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2309   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2310   // types will have length zero if this is not an InstanceKlass
2311   // (length is determined by call to JVM_GetClassCPEntriesCount)
2312   if (k->is_instance_klass()) {
2313     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2314     for (int index = cp->length() - 1; index >= 0; index--) {
2315       constantTag tag = cp->tag_at(index);
2316       types[index] = tag.is_unresolved_klass() ? JVM_CONSTANT_Class : tag.value();
2317     }
2318   }
2319 JVM_END
2320 
2321 
2322 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2323   JVMWrapper("JVM_GetClassCPEntriesCount");
2324   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2325   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2326   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2327 JVM_END
2328 
2329 
2330 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2331   JVMWrapper("JVM_GetClassFieldsCount");
2332   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2333   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2334   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2335 JVM_END
2336 
2337 
2338 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2339   JVMWrapper("JVM_GetClassMethodsCount");
2340   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2341   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2342   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2343 JVM_END
2344 
2345 
2346 // The following methods, used for the verifier, are never called with
2347 // array klasses, so a direct cast to InstanceKlass is safe.
2348 // Typically, these methods are called in a loop with bounds determined
2349 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2350 // zero for arrays.
2351 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2352   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2353   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2354   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2355   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2356   int length = method->checked_exceptions_length();
2357   if (length > 0) {
2358     CheckedExceptionElement* table= method->checked_exceptions_start();
2359     for (int i = 0; i < length; i++) {
2360       exceptions[i] = table[i].class_cp_index;
2361     }
2362   }
2363 JVM_END
2364 
2365 
2366 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2367   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2368   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2369   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2370   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2371   return method->checked_exceptions_length();
2372 JVM_END
2373 
2374 
2375 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2376   JVMWrapper("JVM_GetMethodIxByteCode");
2377   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2378   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2379   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2380   memcpy(code, method->code_base(), method->code_size());
2381 JVM_END
2382 
2383 
2384 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2385   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2386   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2387   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2388   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2389   return method->code_size();
2390 JVM_END
2391 
2392 
2393 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2394   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2395   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2396   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2397   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2398   ExceptionTable extable(method);
2399   entry->start_pc   = extable.start_pc(entry_index);
2400   entry->end_pc     = extable.end_pc(entry_index);
2401   entry->handler_pc = extable.handler_pc(entry_index);
2402   entry->catchType  = extable.catch_type_index(entry_index);
2403 JVM_END
2404 
2405 
2406 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2407   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2408   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2409   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2410   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2411   return method->exception_table_length();
2412 JVM_END
2413 
2414 
2415 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2416   JVMWrapper("JVM_GetMethodIxModifiers");
2417   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2418   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2419   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2420   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2421 JVM_END
2422 
2423 
2424 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2425   JVMWrapper("JVM_GetFieldIxModifiers");
2426   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2427   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2429 JVM_END
2430 
2431 
2432 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2433   JVMWrapper("JVM_GetMethodIxLocalsCount");
2434   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2435   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2436   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2437   return method->max_locals();
2438 JVM_END
2439 
2440 
2441 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2442   JVMWrapper("JVM_GetMethodIxArgsSize");
2443   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2444   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2445   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2446   return method->size_of_parameters();
2447 JVM_END
2448 
2449 
2450 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2451   JVMWrapper("JVM_GetMethodIxMaxStack");
2452   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2453   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2454   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2455   return method->verifier_max_stack();
2456 JVM_END
2457 
2458 
2459 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2460   JVMWrapper("JVM_IsConstructorIx");
2461   ResourceMark rm(THREAD);
2462   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2463   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2464   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2465   return method->is_object_constructor();
2466 JVM_END
2467 
2468 
2469 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2470   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2471   ResourceMark rm(THREAD);
2472   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2473   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2474   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2475   return method->is_overpass();
2476 JVM_END
2477 
2478 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2479   JVMWrapper("JVM_GetMethodIxIxUTF");
2480   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2481   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2482   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2483   return method->name()->as_utf8();
2484 JVM_END
2485 
2486 
2487 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2488   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2489   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2490   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2491   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2492   return method->signature()->as_utf8();
2493 JVM_END
2494 
2495 /**
2496  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2497  * read entries in the constant pool.  Since the old verifier always
2498  * works on a copy of the code, it will not see any rewriting that
2499  * may possibly occur in the middle of verification.  So it is important
2500  * that nothing it calls tries to use the cpCache instead of the raw
2501  * constant pool, so we must use cp->uncached_x methods when appropriate.
2502  */
2503 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2504   JVMWrapper("JVM_GetCPFieldNameUTF");
2505   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2506   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2507   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2508   switch (cp->tag_at(cp_index).value()) {
2509     case JVM_CONSTANT_Fieldref:
2510       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2511     default:
2512       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2513   }
2514   ShouldNotReachHere();
2515   return NULL;
2516 JVM_END
2517 
2518 
2519 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2520   JVMWrapper("JVM_GetCPMethodNameUTF");
2521   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2522   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2523   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2524   switch (cp->tag_at(cp_index).value()) {
2525     case JVM_CONSTANT_InterfaceMethodref:
2526     case JVM_CONSTANT_Methodref:
2527       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2528     default:
2529       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2530   }
2531   ShouldNotReachHere();
2532   return NULL;
2533 JVM_END
2534 
2535 
2536 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2537   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2538   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2539   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2540   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2541   switch (cp->tag_at(cp_index).value()) {
2542     case JVM_CONSTANT_InterfaceMethodref:
2543     case JVM_CONSTANT_Methodref:
2544       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2545     default:
2546       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2547   }
2548   ShouldNotReachHere();
2549   return NULL;
2550 JVM_END
2551 
2552 
2553 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2554   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2555   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2556   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2557   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2558   switch (cp->tag_at(cp_index).value()) {
2559     case JVM_CONSTANT_Fieldref:
2560       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2561     default:
2562       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2563   }
2564   ShouldNotReachHere();
2565   return NULL;
2566 JVM_END
2567 
2568 
2569 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2570   JVMWrapper("JVM_GetCPClassNameUTF");
2571   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2572   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2573   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2574   Symbol* classname = cp->klass_name_at(cp_index);
2575   return classname->as_utf8();
2576 JVM_END
2577 
2578 
2579 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2580   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2581   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2582   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2583   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2584   switch (cp->tag_at(cp_index).value()) {
2585     case JVM_CONSTANT_Fieldref: {
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_GetCPFieldClassNameUTF: illegal constant");
2592   }
2593   ShouldNotReachHere();
2594   return NULL;
2595 JVM_END
2596 
2597 
2598 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2599   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2600   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2601   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2602   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2603   switch (cp->tag_at(cp_index).value()) {
2604     case JVM_CONSTANT_Methodref:
2605     case JVM_CONSTANT_InterfaceMethodref: {
2606       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2607       Symbol* classname = cp->klass_name_at(class_index);
2608       return classname->as_utf8();
2609     }
2610     default:
2611       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2612   }
2613   ShouldNotReachHere();
2614   return NULL;
2615 JVM_END
2616 
2617 
2618 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2619   JVMWrapper("JVM_GetCPFieldModifiers");
2620   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2621   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2622   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2623   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2624   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2625   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2626   switch (cp->tag_at(cp_index).value()) {
2627     case JVM_CONSTANT_Fieldref: {
2628       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2629       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2630       InstanceKlass* ik = InstanceKlass::cast(k_called);
2631       for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2632         if (fs.name() == name && fs.signature() == signature) {
2633           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2634         }
2635       }
2636       return -1;
2637     }
2638     default:
2639       fatal("JVM_GetCPFieldModifiers: illegal constant");
2640   }
2641   ShouldNotReachHere();
2642   return 0;
2643 JVM_END
2644 
2645 
2646 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2647   JVMWrapper("JVM_GetCPMethodModifiers");
2648   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2649   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2650   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2651   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2652   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2653   switch (cp->tag_at(cp_index).value()) {
2654     case JVM_CONSTANT_Methodref:
2655     case JVM_CONSTANT_InterfaceMethodref: {
2656       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2657       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2658       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2659       int methods_count = methods->length();
2660       for (int i = 0; i < methods_count; i++) {
2661         Method* method = methods->at(i);
2662         if (method->name() == name && method->signature() == signature) {
2663             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2664         }
2665       }
2666       return -1;
2667     }
2668     default:
2669       fatal("JVM_GetCPMethodModifiers: illegal constant");
2670   }
2671   ShouldNotReachHere();
2672   return 0;
2673 JVM_END
2674 
2675 
2676 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2677 
2678 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2679   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2680 JVM_END
2681 
2682 
2683 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2684   JVMWrapper("JVM_IsSameClassPackage");
2685   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2686   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2687   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2688   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2689   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2690 JVM_END
2691 
2692 // Printing support //////////////////////////////////////////////////
2693 extern "C" {
2694 
2695 ATTRIBUTE_PRINTF(3, 0)
2696 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2697   // Reject count values that are negative signed values converted to
2698   // unsigned; see bug 4399518, 4417214
2699   if ((intptr_t)count <= 0) return -1;
2700 
2701   int result = os::vsnprintf(str, count, fmt, args);
2702   if (result > 0 && (size_t)result >= count) {
2703     result = -1;
2704   }
2705 
2706   return result;
2707 }
2708 
2709 ATTRIBUTE_PRINTF(3, 4)
2710 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2711   va_list args;
2712   int len;
2713   va_start(args, fmt);
2714   len = jio_vsnprintf(str, count, fmt, args);
2715   va_end(args);
2716   return len;
2717 }
2718 
2719 ATTRIBUTE_PRINTF(2, 3)
2720 int jio_fprintf(FILE* f, const char *fmt, ...) {
2721   int len;
2722   va_list args;
2723   va_start(args, fmt);
2724   len = jio_vfprintf(f, fmt, args);
2725   va_end(args);
2726   return len;
2727 }
2728 
2729 ATTRIBUTE_PRINTF(2, 0)
2730 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2731   if (Arguments::vfprintf_hook() != NULL) {
2732      return Arguments::vfprintf_hook()(f, fmt, args);
2733   } else {
2734     return vfprintf(f, fmt, args);
2735   }
2736 }
2737 
2738 ATTRIBUTE_PRINTF(1, 2)
2739 JNIEXPORT int jio_printf(const char *fmt, ...) {
2740   int len;
2741   va_list args;
2742   va_start(args, fmt);
2743   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2744   va_end(args);
2745   return len;
2746 }
2747 
2748 // HotSpot specific jio method
2749 void jio_print(const char* s, size_t len) {
2750   // Try to make this function as atomic as possible.
2751   if (Arguments::vfprintf_hook() != NULL) {
2752     jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2753   } else {
2754     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2755     size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2756   }
2757 }
2758 
2759 } // Extern C
2760 
2761 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2762 
2763 // In most of the JVM thread support functions we need to access the
2764 // thread through a ThreadsListHandle to prevent it from exiting and
2765 // being reclaimed while we try to operate on it. The exceptions to this
2766 // rule are when operating on the current thread, or if the monitor of
2767 // the target java.lang.Thread is locked at the Java level - in both
2768 // cases the target cannot exit.
2769 
2770 static void thread_entry(JavaThread* thread, TRAPS) {
2771   HandleMark hm(THREAD);
2772   Handle obj(THREAD, thread->threadObj());
2773   JavaValue result(T_VOID);
2774   JavaCalls::call_virtual(&result,
2775                           obj,
2776                           SystemDictionary::Thread_klass(),
2777                           vmSymbols::run_method_name(),
2778                           vmSymbols::void_method_signature(),
2779                           THREAD);
2780 }
2781 
2782 
2783 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2784   JVMWrapper("JVM_StartThread");
2785   JavaThread *native_thread = NULL;
2786 
2787   // We cannot hold the Threads_lock when we throw an exception,
2788   // due to rank ordering issues. Example:  we might need to grab the
2789   // Heap_lock while we construct the exception.
2790   bool throw_illegal_thread_state = false;
2791 
2792   // We must release the Threads_lock before we can post a jvmti event
2793   // in Thread::start.
2794   {
2795     // Ensure that the C++ Thread and OSThread structures aren't freed before
2796     // we operate.
2797     MutexLocker mu(Threads_lock);
2798 
2799     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2800     // re-starting an already started thread, so we should usually find
2801     // that the JavaThread is null. However for a JNI attached thread
2802     // there is a small window between the Thread object being created
2803     // (with its JavaThread set) and the update to its threadStatus, so we
2804     // have to check for this
2805     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2806       throw_illegal_thread_state = true;
2807     } else {
2808       // We could also check the stillborn flag to see if this thread was already stopped, but
2809       // for historical reasons we let the thread detect that itself when it starts running
2810 
2811       jlong size =
2812              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2813       // Allocate the C++ Thread structure and create the native thread.  The
2814       // stack size retrieved from java is 64-bit signed, but the constructor takes
2815       // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2816       //  - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2817       //  - Avoid passing negative values which would result in really large stacks.
2818       NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2819       size_t sz = size > 0 ? (size_t) size : 0;
2820       native_thread = new JavaThread(&thread_entry, sz);
2821 
2822       // At this point it may be possible that no osthread was created for the
2823       // JavaThread due to lack of memory. Check for this situation and throw
2824       // an exception if necessary. Eventually we may want to change this so
2825       // that we only grab the lock if the thread was created successfully -
2826       // then we can also do this check and throw the exception in the
2827       // JavaThread constructor.
2828       if (native_thread->osthread() != NULL) {
2829         // Note: the current thread is not being used within "prepare".
2830         native_thread->prepare(jthread);
2831       }
2832     }
2833   }
2834 
2835   if (throw_illegal_thread_state) {
2836     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2837   }
2838 
2839   assert(native_thread != NULL, "Starting null thread?");
2840 
2841   if (native_thread->osthread() == NULL) {
2842     // No one should hold a reference to the 'native_thread'.
2843     native_thread->smr_delete();
2844     if (JvmtiExport::should_post_resource_exhausted()) {
2845       JvmtiExport::post_resource_exhausted(
2846         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2847         os::native_thread_creation_failed_msg());
2848     }
2849     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2850               os::native_thread_creation_failed_msg());
2851   }
2852 
2853   Thread::start(native_thread);
2854 
2855 JVM_END
2856 
2857 
2858 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2859 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2860 // but is thought to be reliable and simple. In the case, where the receiver is the
2861 // same thread as the sender, no VM_Operation is needed.
2862 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2863   JVMWrapper("JVM_StopThread");
2864 
2865   // A nested ThreadsListHandle will grab the Threads_lock so create
2866   // tlh before we resolve throwable.
2867   ThreadsListHandle tlh(thread);
2868   oop java_throwable = JNIHandles::resolve(throwable);
2869   if (java_throwable == NULL) {
2870     THROW(vmSymbols::java_lang_NullPointerException());
2871   }
2872   oop java_thread = NULL;
2873   JavaThread* receiver = NULL;
2874   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2875   Events::log_exception(thread,
2876                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2877                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
2878 
2879   if (is_alive) {
2880     // jthread refers to a live JavaThread.
2881     if (thread == receiver) {
2882       // Exception is getting thrown at self so no VM_Operation needed.
2883       THROW_OOP(java_throwable);
2884     } else {
2885       // Use a VM_Operation to throw the exception.
2886       Thread::send_async_exception(java_thread, java_throwable);
2887     }
2888   } else {
2889     // Either:
2890     // - target thread has not been started before being stopped, or
2891     // - target thread already terminated
2892     // We could read the threadStatus to determine which case it is
2893     // but that is overkill as it doesn't matter. We must set the
2894     // stillborn flag for the first case, and if the thread has already
2895     // exited setting this flag has no effect.
2896     java_lang_Thread::set_stillborn(java_thread);
2897   }
2898 JVM_END
2899 
2900 
2901 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2902   JVMWrapper("JVM_IsThreadAlive");
2903 
2904   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2905   return java_lang_Thread::is_alive(thread_oop);
2906 JVM_END
2907 
2908 
2909 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2910   JVMWrapper("JVM_SuspendThread");
2911 
2912   ThreadsListHandle tlh(thread);
2913   JavaThread* receiver = NULL;
2914   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2915   if (is_alive) {
2916     // jthread refers to a live JavaThread.
2917     {
2918       MutexLocker ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2919       if (receiver->is_external_suspend()) {
2920         // Don't allow nested external suspend requests. We can't return
2921         // an error from this interface so just ignore the problem.
2922         return;
2923       }
2924       if (receiver->is_exiting()) { // thread is in the process of exiting
2925         return;
2926       }
2927       receiver->set_external_suspend();
2928     }
2929 
2930     // java_suspend() will catch threads in the process of exiting
2931     // and will ignore them.
2932     receiver->java_suspend();
2933 
2934     // It would be nice to have the following assertion in all the
2935     // time, but it is possible for a racing resume request to have
2936     // resumed this thread right after we suspended it. Temporarily
2937     // enable this assertion if you are chasing a different kind of
2938     // bug.
2939     //
2940     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2941     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2942   }
2943 JVM_END
2944 
2945 
2946 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2947   JVMWrapper("JVM_ResumeThread");
2948 
2949   ThreadsListHandle tlh(thread);
2950   JavaThread* receiver = NULL;
2951   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2952   if (is_alive) {
2953     // jthread refers to a live JavaThread.
2954 
2955     // This is the original comment for this Threads_lock grab:
2956     //   We need to *always* get the threads lock here, since this operation cannot be allowed during
2957     //   a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2958     //   threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2959     //   looks at it.
2960     //
2961     // The above comment dates back to when we had both internal and
2962     // external suspend APIs that shared a common underlying mechanism.
2963     // External suspend is now entirely cooperative and doesn't share
2964     // anything with internal suspend. That said, there are some
2965     // assumptions in the VM that an external resume grabs the
2966     // Threads_lock. We can't drop the Threads_lock grab here until we
2967     // resolve the assumptions that exist elsewhere.
2968     //
2969     MutexLocker ml(Threads_lock);
2970     receiver->java_resume();
2971   }
2972 JVM_END
2973 
2974 
2975 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2976   JVMWrapper("JVM_SetThreadPriority");
2977 
2978   ThreadsListHandle tlh(thread);
2979   oop java_thread = NULL;
2980   JavaThread* receiver = NULL;
2981   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2982   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2983 
2984   if (is_alive) {
2985     // jthread refers to a live JavaThread.
2986     Thread::set_priority(receiver, (ThreadPriority)prio);
2987   }
2988   // Implied else: If the JavaThread hasn't started yet, then the
2989   // priority set in the java.lang.Thread object above will be pushed
2990   // down when it does start.
2991 JVM_END
2992 
2993 
2994 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2995   JVMWrapper("JVM_Yield");
2996   if (os::dont_yield()) return;
2997   HOTSPOT_THREAD_YIELD();
2998   os::naked_yield();
2999 JVM_END
3000 
3001 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3002   assert(event != NULL, "invariant");
3003   assert(event->should_commit(), "invariant");
3004   event->set_time(millis);
3005   event->commit();
3006 }
3007 
3008 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3009   JVMWrapper("JVM_Sleep");
3010 
3011   if (millis < 0) {
3012     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3013   }
3014 
3015   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3016     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3017   }
3018 
3019   // Save current thread state and restore it at the end of this block.
3020   // And set new thread state to SLEEPING.
3021   JavaThreadSleepState jtss(thread);
3022 
3023   HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3024   EventThreadSleep event;
3025 
3026   if (millis == 0) {
3027     os::naked_yield();
3028   } else {
3029     ThreadState old_state = thread->osthread()->get_state();
3030     thread->osthread()->set_state(SLEEPING);
3031     if (os::sleep(thread, millis, true) == OS_INTRPT) {
3032       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3033       // us while we were sleeping. We do not overwrite those.
3034       if (!HAS_PENDING_EXCEPTION) {
3035         if (event.should_commit()) {
3036           post_thread_sleep_event(&event, millis);
3037         }
3038         HOTSPOT_THREAD_SLEEP_END(1);
3039 
3040         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3041         // to properly restore the thread state.  That's likely wrong.
3042         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3043       }
3044     }
3045     thread->osthread()->set_state(old_state);
3046   }
3047   if (event.should_commit()) {
3048     post_thread_sleep_event(&event, millis);
3049   }
3050   HOTSPOT_THREAD_SLEEP_END(0);
3051 JVM_END
3052 
3053 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3054   JVMWrapper("JVM_CurrentThread");
3055   oop jthread = thread->threadObj();
3056   assert (thread != NULL, "no current thread!");
3057   return JNIHandles::make_local(env, jthread);
3058 JVM_END
3059 
3060 class CountStackFramesTC : public ThreadClosure {
3061   int _count;
3062   bool _suspended;
3063  public:
3064   CountStackFramesTC() : _count(0), _suspended(false) {}
3065   virtual void do_thread(Thread* thread) {
3066     JavaThread* jt = (JavaThread*)thread;
3067     if (!jt->is_external_suspend()) {
3068       // To keep same behavior we fail this operation,
3069       // even if it would work perfectly.
3070       return;
3071     }
3072     _suspended = true;
3073      // Count all java activation, i.e., number of vframes.
3074     for (vframeStream vfst(jt); !vfst.at_end(); vfst.next()) {
3075       // Native frames are not counted.
3076       if (!vfst.method()->is_native()) _count++;
3077     }
3078   }
3079   int count() { return _count; }
3080   int suspended() { return _suspended; }
3081 };
3082 
3083 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3084   JVMWrapper("JVM_CountStackFrames");
3085 
3086   ThreadsListHandle tlh(thread);
3087   JavaThread* receiver = NULL;
3088   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3089   if (is_alive) {
3090     // jthread refers to a live JavaThread.
3091     CountStackFramesTC csf;
3092     Handshake::execute(&csf, receiver);
3093     if (!csf.suspended()) {
3094       THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3095                   "this thread is not suspended");
3096     }
3097     return csf.count();
3098   }
3099   // Implied else: if JavaThread is not alive simply return a count of 0.
3100   return 0;
3101 JVM_END
3102 
3103 
3104 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3105   JVMWrapper("JVM_Interrupt");
3106 
3107   ThreadsListHandle tlh(thread);
3108   JavaThread* receiver = NULL;
3109   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3110   if (is_alive) {
3111     // jthread refers to a live JavaThread.
3112     Thread::interrupt(receiver);
3113   }
3114 JVM_END
3115 
3116 
3117 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3118   JVMWrapper("JVM_IsInterrupted");
3119 
3120   ThreadsListHandle tlh(thread);
3121   JavaThread* receiver = NULL;
3122   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3123   if (is_alive) {
3124     // jthread refers to a live JavaThread.
3125     return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3126   } else {
3127     return JNI_FALSE;
3128   }
3129 JVM_END
3130 
3131 
3132 // Return true iff the current thread has locked the object passed in
3133 
3134 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3135   JVMWrapper("JVM_HoldsLock");
3136   assert(THREAD->is_Java_thread(), "sanity check");
3137   if (obj == NULL) {
3138     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3139   }
3140   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3141   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3142 JVM_END
3143 
3144 
3145 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3146   JVMWrapper("JVM_DumpAllStacks");
3147   VM_PrintThreads op;
3148   VMThread::execute(&op);
3149   if (JvmtiExport::should_post_data_dump()) {
3150     JvmtiExport::post_data_dump();
3151   }
3152 JVM_END
3153 
3154 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3155   JVMWrapper("JVM_SetNativeThreadName");
3156 
3157   // We don't use a ThreadsListHandle here because the current thread
3158   // must be alive.
3159   oop java_thread = JNIHandles::resolve_non_null(jthread);
3160   JavaThread* thr = java_lang_Thread::thread(java_thread);
3161   if (thread == thr && !thr->has_attached_via_jni()) {
3162     // Thread naming is only supported for the current thread and
3163     // we don't set the name of an attached thread to avoid stepping
3164     // on other programs.
3165     ResourceMark rm(thread);
3166     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3167     os::set_native_thread_name(thread_name);
3168   }
3169 JVM_END
3170 
3171 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3172 
3173 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3174   JVMWrapper("JVM_GetClassContext");
3175   ResourceMark rm(THREAD);
3176   JvmtiVMObjectAllocEventCollector oam;
3177   vframeStream vfst(thread);
3178 
3179   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3180     // This must only be called from SecurityManager.getClassContext
3181     Method* m = vfst.method();
3182     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3183           m->name()          == vmSymbols::getClassContext_name() &&
3184           m->signature()     == vmSymbols::void_class_array_signature())) {
3185       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3186     }
3187   }
3188 
3189   // Collect method holders
3190   GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3191   for (; !vfst.at_end(); vfst.security_next()) {
3192     Method* m = vfst.method();
3193     // Native frames are not returned
3194     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3195       Klass* holder = m->method_holder();
3196       assert(holder->is_klass(), "just checking");
3197       klass_array->append(holder);
3198     }
3199   }
3200 
3201   // Create result array of type [Ljava/lang/Class;
3202   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3203   // Fill in mirrors corresponding to method holders
3204   for (int i = 0; i < klass_array->length(); i++) {
3205     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3206   }
3207 
3208   return (jobjectArray) JNIHandles::make_local(env, result);
3209 JVM_END
3210 
3211 
3212 // java.lang.Package ////////////////////////////////////////////////////////////////
3213 
3214 
3215 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3216   JVMWrapper("JVM_GetSystemPackage");
3217   ResourceMark rm(THREAD);
3218   JvmtiVMObjectAllocEventCollector oam;
3219   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3220   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3221   return (jstring) JNIHandles::make_local(result);
3222 JVM_END
3223 
3224 
3225 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3226   JVMWrapper("JVM_GetSystemPackages");
3227   JvmtiVMObjectAllocEventCollector oam;
3228   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3229   return (jobjectArray) JNIHandles::make_local(result);
3230 JVM_END
3231 
3232 
3233 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3234 
3235 
3236 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3237   JVMWrapper("JVM_GetAndClearReferencePendingList");
3238 
3239   MonitorLocker ml(Heap_lock);
3240   oop ref = Universe::reference_pending_list();
3241   if (ref != NULL) {
3242     Universe::set_reference_pending_list(NULL);
3243   }
3244   return JNIHandles::make_local(env, ref);
3245 JVM_END
3246 
3247 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3248   JVMWrapper("JVM_HasReferencePendingList");
3249   MonitorLocker ml(Heap_lock);
3250   return Universe::has_reference_pending_list();
3251 JVM_END
3252 
3253 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3254   JVMWrapper("JVM_WaitForReferencePendingList");
3255   MonitorLocker ml(Heap_lock);
3256   while (!Universe::has_reference_pending_list()) {
3257     ml.wait();
3258   }
3259 JVM_END
3260 
3261 
3262 // ObjectInputStream ///////////////////////////////////////////////////////////////
3263 
3264 // Return the first user-defined class loader up the execution stack, or null
3265 // if only code from the bootstrap or platform class loader is on the stack.
3266 
3267 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3268   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3269     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3270     oop loader = vfst.method()->method_holder()->class_loader();
3271     if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3272       return JNIHandles::make_local(env, loader);
3273     }
3274   }
3275   return NULL;
3276 JVM_END
3277 
3278 
3279 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3280 
3281 
3282 // resolve array handle and check arguments
3283 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3284   if (arr == NULL) {
3285     THROW_0(vmSymbols::java_lang_NullPointerException());
3286   }
3287   oop a = JNIHandles::resolve_non_null(arr);
3288   if (!a->is_array()) {
3289     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3290   } else if (type_array_only && !a->is_typeArray()) {
3291     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3292   }
3293   return arrayOop(a);
3294 }
3295 
3296 
3297 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3298   JVMWrapper("JVM_GetArrayLength");
3299   arrayOop a = check_array(env, arr, false, CHECK_0);
3300   return a->length();
3301 JVM_END
3302 
3303 
3304 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3305   JVMWrapper("JVM_Array_Get");
3306   JvmtiVMObjectAllocEventCollector oam;
3307   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3308   jvalue value;
3309   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3310   oop box = Reflection::box(&value, type, CHECK_NULL);
3311   return JNIHandles::make_local(env, box);
3312 JVM_END
3313 
3314 
3315 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3316   JVMWrapper("JVM_GetPrimitiveArrayElement");
3317   jvalue value;
3318   value.i = 0; // to initialize value before getting used in CHECK
3319   arrayOop a = check_array(env, arr, true, CHECK_(value));
3320   assert(a->is_typeArray(), "just checking");
3321   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3322   BasicType wide_type = (BasicType) wCode;
3323   if (type != wide_type) {
3324     Reflection::widen(&value, type, wide_type, CHECK_(value));
3325   }
3326   return value;
3327 JVM_END
3328 
3329 
3330 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3331   JVMWrapper("JVM_SetArrayElement");
3332   arrayOop a = check_array(env, arr, false, CHECK);
3333   oop box = JNIHandles::resolve(val);
3334   jvalue value;
3335   value.i = 0; // to initialize value before getting used in CHECK
3336   BasicType value_type;
3337   if (a->is_objArray()) {
3338     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3339     value_type = Reflection::unbox_for_regular_object(box, &value);
3340   } else {
3341     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3342   }
3343   Reflection::array_set(&value, a, index, value_type, CHECK);
3344 JVM_END
3345 
3346 
3347 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3348   JVMWrapper("JVM_SetPrimitiveArrayElement");
3349   arrayOop a = check_array(env, arr, true, CHECK);
3350   assert(a->is_typeArray(), "just checking");
3351   BasicType value_type = (BasicType) vCode;
3352   Reflection::array_set(&v, a, index, value_type, CHECK);
3353 JVM_END
3354 
3355 
3356 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3357   JVMWrapper("JVM_NewArray");
3358   JvmtiVMObjectAllocEventCollector oam;
3359   oop element_mirror = JNIHandles::resolve(eltClass);
3360   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3361   return JNIHandles::make_local(env, result);
3362 JVM_END
3363 
3364 
3365 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3366   JVMWrapper("JVM_NewMultiArray");
3367   JvmtiVMObjectAllocEventCollector oam;
3368   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3369   oop element_mirror = JNIHandles::resolve(eltClass);
3370   assert(dim_array->is_typeArray(), "just checking");
3371   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3372   return JNIHandles::make_local(env, result);
3373 JVM_END
3374 
3375 
3376 // Library support ///////////////////////////////////////////////////////////////////////////
3377 
3378 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3379   //%note jvm_ct
3380   JVMWrapper("JVM_LoadLibrary");
3381   char ebuf[1024];
3382   void *load_result;
3383   {
3384     ThreadToNativeFromVM ttnfvm(thread);
3385     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3386   }
3387   if (load_result == NULL) {
3388     char msg[1024];
3389     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3390     // Since 'ebuf' may contain a string encoded using
3391     // platform encoding scheme, we need to pass
3392     // Exceptions::unsafe_to_utf8 to the new_exception method
3393     // as the last argument. See bug 6367357.
3394     Handle h_exception =
3395       Exceptions::new_exception(thread,
3396                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3397                                 msg, Exceptions::unsafe_to_utf8);
3398 
3399     THROW_HANDLE_0(h_exception);
3400   }
3401   return load_result;
3402 JVM_END
3403 
3404 
3405 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3406   JVMWrapper("JVM_UnloadLibrary");
3407   os::dll_unload(handle);
3408 JVM_END
3409 
3410 
3411 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3412   JVMWrapper("JVM_FindLibraryEntry");
3413   return os::dll_lookup(handle, name);
3414 JVM_END
3415 
3416 
3417 // JNI version ///////////////////////////////////////////////////////////////////////////////
3418 
3419 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3420   JVMWrapper("JVM_IsSupportedJNIVersion");
3421   return Threads::is_supported_jni_version_including_1_1(version);
3422 JVM_END
3423 
3424 
3425 // String support ///////////////////////////////////////////////////////////////////////////
3426 
3427 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3428   JVMWrapper("JVM_InternString");
3429   JvmtiVMObjectAllocEventCollector oam;
3430   if (str == NULL) return NULL;
3431   oop string = JNIHandles::resolve_non_null(str);
3432   oop result = StringTable::intern(string, CHECK_NULL);
3433   return (jstring) JNIHandles::make_local(env, result);
3434 JVM_END
3435 
3436 
3437 // Raw monitor support //////////////////////////////////////////////////////////////////////
3438 
3439 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3440 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3441 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3442 // that only works with java threads.
3443 
3444 
3445 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3446   VM_Exit::block_if_vm_exited();
3447   JVMWrapper("JVM_RawMonitorCreate");
3448   return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3449 }
3450 
3451 
3452 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3453   VM_Exit::block_if_vm_exited();
3454   JVMWrapper("JVM_RawMonitorDestroy");
3455   delete ((Mutex*) mon);
3456 }
3457 
3458 
3459 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3460   VM_Exit::block_if_vm_exited();
3461   JVMWrapper("JVM_RawMonitorEnter");
3462   ((Mutex*) mon)->jvm_raw_lock();
3463   return 0;
3464 }
3465 
3466 
3467 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3468   VM_Exit::block_if_vm_exited();
3469   JVMWrapper("JVM_RawMonitorExit");
3470   ((Mutex*) mon)->jvm_raw_unlock();
3471 }
3472 
3473 
3474 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3475 
3476 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3477                                     Handle loader, Handle protection_domain,
3478                                     jboolean throwError, TRAPS) {
3479   // Security Note:
3480   //   The Java level wrapper will perform the necessary security check allowing
3481   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
3482   //   the checkPackageAccess relative to the initiating class loader via the
3483   //   protection_domain. The protection_domain is passed as NULL by the java code
3484   //   if there is no security manager in 3-arg Class.forName().
3485   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3486 
3487   // Check if we should initialize the class
3488   if (init && klass->is_instance_klass()) {
3489     klass->initialize(CHECK_NULL);
3490   }
3491   return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3492 }
3493 
3494 
3495 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3496 
3497 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3498   JVMWrapper("JVM_InvokeMethod");
3499   Handle method_handle;
3500   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3501     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3502     Handle receiver(THREAD, JNIHandles::resolve(obj));
3503     objArrayHandle args = oopFactory::ensure_objArray(JNIHandles::resolve(args0), CHECK_NULL);
3504     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3505     jobject res = JNIHandles::make_local(env, result);
3506     if (JvmtiExport::should_post_vm_object_alloc()) {
3507       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3508       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3509       if (java_lang_Class::is_primitive(ret_type)) {
3510         // Only for primitive type vm allocates memory for java object.
3511         // See box() method.
3512         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3513       }
3514     }
3515     return res;
3516   } else {
3517     THROW_0(vmSymbols::java_lang_StackOverflowError());
3518   }
3519 JVM_END
3520 
3521 
3522 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3523   JVMWrapper("JVM_NewInstanceFromConstructor");
3524   objArrayHandle args = oopFactory::ensure_objArray(JNIHandles::resolve(args0), CHECK_NULL);
3525   oop constructor_mirror = JNIHandles::resolve(c);
3526   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3527   jobject res = JNIHandles::make_local(env, result);
3528   if (JvmtiExport::should_post_vm_object_alloc()) {
3529     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3530   }
3531   return res;
3532 JVM_END
3533 
3534 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3535 
3536 JVM_LEAF(jboolean, JVM_SupportsCX8())
3537   JVMWrapper("JVM_SupportsCX8");
3538   return VM_Version::supports_cx8();
3539 JVM_END
3540 
3541 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3542   JVMWrapper("JVM_InitializeFromArchive");
3543   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3544   assert(k->is_klass(), "just checking");
3545   HeapShared::initialize_from_archived_subgraph(k);
3546 JVM_END
3547 
3548 // Returns an array of all live Thread objects (VM internal JavaThreads,
3549 // jvmti agent threads, and JNI attaching threads  are skipped)
3550 // See CR 6404306 regarding JNI attaching threads
3551 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3552   ResourceMark rm(THREAD);
3553   ThreadsListEnumerator tle(THREAD, false, false);
3554   JvmtiVMObjectAllocEventCollector oam;
3555 
3556   int num_threads = tle.num_threads();
3557   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3558   objArrayHandle threads_ah(THREAD, r);
3559 
3560   for (int i = 0; i < num_threads; i++) {
3561     Handle h = tle.get_threadObj(i);
3562     threads_ah->obj_at_put(i, h());
3563   }
3564 
3565   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3566 JVM_END
3567 
3568 
3569 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3570 // Return StackTraceElement[][], each element is the stack trace of a thread in
3571 // the corresponding entry in the given threads array
3572 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3573   JVMWrapper("JVM_DumpThreads");
3574   JvmtiVMObjectAllocEventCollector oam;
3575 
3576   // Check if threads is null
3577   if (threads == NULL) {
3578     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3579   }
3580 
3581   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3582   objArrayHandle ah(THREAD, a);
3583   int num_threads = ah->length();
3584   // check if threads is non-empty array
3585   if (num_threads == 0) {
3586     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3587   }
3588 
3589   // check if threads is not an array of objects of Thread class
3590   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3591   if (k != SystemDictionary::Thread_klass()) {
3592     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3593   }
3594 
3595   ResourceMark rm(THREAD);
3596 
3597   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3598   for (int i = 0; i < num_threads; i++) {
3599     oop thread_obj = ah->obj_at(i);
3600     instanceHandle h(THREAD, (instanceOop) thread_obj);
3601     thread_handle_array->append(h);
3602   }
3603 
3604   // The JavaThread references in thread_handle_array are validated
3605   // in VM_ThreadDump::doit().
3606   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3607   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3608 
3609 JVM_END
3610 
3611 // JVM monitoring and management support
3612 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3613   return Management::get_jmm_interface(version);
3614 JVM_END
3615 
3616 // com.sun.tools.attach.VirtualMachine agent properties support
3617 //
3618 // Initialize the agent properties with the properties maintained in the VM
3619 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3620   JVMWrapper("JVM_InitAgentProperties");
3621   ResourceMark rm;
3622 
3623   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3624 
3625   PUTPROP(props, "sun.java.command", Arguments::java_command());
3626   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3627   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3628   return properties;
3629 JVM_END
3630 
3631 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3632 {
3633   JVMWrapper("JVM_GetEnclosingMethodInfo");
3634   JvmtiVMObjectAllocEventCollector oam;
3635 
3636   if (ofClass == NULL) {
3637     return NULL;
3638   }
3639   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3640   // Special handling for primitive objects
3641   if (java_lang_Class::is_primitive(mirror())) {
3642     return NULL;
3643   }
3644   Klass* k = java_lang_Class::as_Klass(mirror());
3645   if (!k->is_instance_klass()) {
3646     return NULL;
3647   }
3648   InstanceKlass* ik = InstanceKlass::cast(k);
3649   int encl_method_class_idx = ik->enclosing_method_class_index();
3650   if (encl_method_class_idx == 0) {
3651     return NULL;
3652   }
3653   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3654   objArrayHandle dest(THREAD, dest_o);
3655   Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3656   dest->obj_at_put(0, enc_k->java_mirror());
3657   int encl_method_method_idx = ik->enclosing_method_method_index();
3658   if (encl_method_method_idx != 0) {
3659     Symbol* sym = ik->constants()->symbol_at(
3660                         extract_low_short_from_int(
3661                           ik->constants()->name_and_type_at(encl_method_method_idx)));
3662     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3663     dest->obj_at_put(1, str());
3664     sym = ik->constants()->symbol_at(
3665               extract_high_short_from_int(
3666                 ik->constants()->name_and_type_at(encl_method_method_idx)));
3667     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3668     dest->obj_at_put(2, str());
3669   }
3670   return (jobjectArray) JNIHandles::make_local(dest());
3671 }
3672 JVM_END
3673 
3674 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3675 {
3676   memset(info, 0, info_size);
3677 
3678   info->jvm_version = VM_Version::jvm_version();
3679   info->patch_version = VM_Version::vm_patch_version();
3680 
3681   // when we add a new capability in the jvm_version_info struct, we should also
3682   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3683   // counter defined in runtimeService.cpp.
3684   info->is_attach_supported = AttachListener::is_attach_supported();
3685 }
3686 JVM_END
3687 
3688 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3689 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3690   ResourceMark rm(THREAD);
3691 
3692   if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3693     return NULL;
3694   }
3695 
3696   char** vm_flags = Arguments::jvm_flags_array();
3697   char** vm_args = Arguments::jvm_args_array();
3698   int num_flags = Arguments::num_jvm_flags();
3699   int num_args = Arguments::num_jvm_args();
3700 
3701   InstanceKlass* ik = SystemDictionary::String_klass();
3702   objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3703   objArrayHandle result_h(THREAD, r);
3704 
3705   int index = 0;
3706   for (int j = 0; j < num_flags; j++, index++) {
3707     Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3708     result_h->obj_at_put(index, h());
3709   }
3710   for (int i = 0; i < num_args; i++, index++) {
3711     Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3712     result_h->obj_at_put(index, h());
3713   }
3714   return (jobjectArray) JNIHandles::make_local(env, result_h());
3715 JVM_END
3716 
3717 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3718   return os::get_signal_number(name);
3719 JVM_END