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 "prims/jvm_misc.hpp"
  57 #include "prims/jvmtiExport.hpp"
  58 #include "prims/jvmtiThreadState.hpp"
  59 #include "prims/nativeLookup.hpp"
  60 #include "prims/stackwalk.hpp"
  61 #include "runtime/arguments.hpp"
  62 #include "runtime/atomic.hpp"
  63 #include "runtime/handles.inline.hpp"
  64 #include "runtime/init.hpp"
  65 #include "runtime/interfaceSupport.inline.hpp"
  66 #include "runtime/deoptimization.hpp"
  67 #include "runtime/handshake.hpp"
  68 #include "runtime/java.hpp"
  69 #include "runtime/javaCalls.hpp"
  70 #include "runtime/jfieldIDWorkaround.hpp"
  71 #include "runtime/jniHandles.inline.hpp"
  72 #include "runtime/orderAccess.hpp"
  73 #include "runtime/os.inline.hpp"
  74 #include "runtime/perfData.hpp"
  75 #include "runtime/reflection.hpp"
  76 #include "runtime/thread.inline.hpp"
  77 #include "runtime/threadSMR.hpp"
  78 #include "runtime/vframe.inline.hpp"
  79 #include "runtime/vmOperations.hpp"
  80 #include "runtime/vm_version.hpp"
  81 #include "services/attachListener.hpp"
  82 #include "services/management.hpp"
  83 #include "services/threadService.hpp"
  84 #include "utilities/copy.hpp"
  85 #include "utilities/defaultStream.hpp"
  86 #include "utilities/dtrace.hpp"
  87 #include "utilities/events.hpp"
  88 #include "utilities/histogram.hpp"
  89 #include "utilities/macros.hpp"
  90 #include "utilities/utf8.hpp"
  91 #if INCLUDE_CDS
  92 #include "classfile/systemDictionaryShared.hpp"
  93 #endif
  94 
  95 #include <errno.h>
  96 
  97 /*
  98   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
  99   such ctors and calls MUST NOT come between an oop declaration/init and its
 100   usage because if objects are move this may cause various memory stomps, bus
 101   errors and segfaults. Here is a cookbook for causing so called "naked oop
 102   failures":
 103 
 104       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
 105           JVMWrapper("JVM_GetClassDeclaredFields");
 106 
 107           // Object address to be held directly in mirror & not visible to GC
 108           oop mirror = JNIHandles::resolve_non_null(ofClass);
 109 
 110           // If this ctor can hit a safepoint, moving objects around, then
 111           ComplexConstructor foo;
 112 
 113           // Boom! mirror may point to JUNK instead of the intended object
 114           (some dereference of mirror)
 115 
 116           // Here's another call that may block for GC, making mirror stale
 117           MutexLocker ml(some_lock);
 118 
 119           // And here's an initializer that can result in a stale oop
 120           // all in one step.
 121           oop o = call_that_can_throw_exception(TRAPS);
 122 
 123 
 124   The solution is to keep the oop declaration BELOW the ctor or function
 125   call that might cause a GC, do another resolve to reassign the oop, or
 126   consider use of a Handle instead of an oop so there is immunity from object
 127   motion. But note that the "QUICK" entries below do not have a handlemark
 128   and thus can only support use of handles passed in.
 129 */
 130 
 131 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
 132   ResourceMark rm;
 133   int line_number = -1;
 134   const char * source_file = NULL;
 135   const char * trace = "explicit";
 136   InstanceKlass* caller = NULL;
 137   JavaThread* jthread = JavaThread::current();
 138   if (jthread->has_last_Java_frame()) {
 139     vframeStream vfst(jthread);
 140 
 141     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
 142     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
 143     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
 144     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
 145     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
 146 
 147     Method* last_caller = NULL;
 148 
 149     while (!vfst.at_end()) {
 150       Method* m = vfst.method();
 151       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
 152           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
 153           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
 154         break;
 155       }
 156       last_caller = m;
 157       vfst.next();
 158     }
 159     // if this is called from Class.forName0 and that is called from Class.forName,
 160     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 161     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 162     bool found_it = false;
 163     if (!vfst.at_end() &&
 164         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 165         vfst.method()->name() == vmSymbols::forName0_name()) {
 166       vfst.next();
 167       if (!vfst.at_end() &&
 168           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 169           vfst.method()->name() == vmSymbols::forName_name()) {
 170         vfst.next();
 171         found_it = true;
 172       }
 173     } else if (last_caller != NULL &&
 174                last_caller->method_holder()->name() ==
 175                  vmSymbols::java_lang_ClassLoader() &&
 176                last_caller->name() == vmSymbols::loadClass_name()) {
 177       found_it = true;
 178     } else if (!vfst.at_end()) {
 179       if (vfst.method()->is_native()) {
 180         // JNI call
 181         found_it = true;
 182       }
 183     }
 184     if (found_it && !vfst.at_end()) {
 185       // found the caller
 186       caller = vfst.method()->method_holder();
 187       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 188       if (line_number == -1) {
 189         // show method name if it's a native method
 190         trace = vfst.method()->name_and_sig_as_C_string();
 191       }
 192       Symbol* s = caller->source_file_name();
 193       if (s != NULL) {
 194         source_file = s->as_C_string();
 195       }
 196     }
 197   }
 198   if (caller != NULL) {
 199     if (to_class != caller) {
 200       const char * from = caller->external_name();
 201       const char * to = to_class->external_name();
 202       // print in a single call to reduce interleaving between threads
 203       if (source_file != NULL) {
 204         log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
 205       } else {
 206         log_debug(class, resolve)("%s %s (%s)", from, to, trace);
 207       }
 208     }
 209   }
 210 }
 211 
 212 void trace_class_resolution(Klass* to_class) {
 213   EXCEPTION_MARK;
 214   trace_class_resolution_impl(to_class, THREAD);
 215   if (HAS_PENDING_EXCEPTION) {
 216     CLEAR_PENDING_EXCEPTION;
 217   }
 218 }
 219 
 220 // Wrapper to trace JVM functions
 221 
 222 #ifdef ASSERT
 223   Histogram* JVMHistogram;
 224   volatile int JVMHistogram_lock = 0;
 225 
 226   class JVMHistogramElement : public HistogramElement {
 227     public:
 228      JVMHistogramElement(const char* name);
 229   };
 230 
 231   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
 232     _name = elementName;
 233     uintx count = 0;
 234 
 235     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
 236       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
 237         count +=1;
 238         if ( (WarnOnStalledSpinLock > 0)
 239           && (count % WarnOnStalledSpinLock == 0)) {
 240           warning("JVMHistogram_lock seems to be stalled");
 241         }
 242       }
 243      }
 244 
 245     if(JVMHistogram == NULL)
 246       JVMHistogram = new Histogram("JVM Call Counts",100);
 247 
 248     JVMHistogram->add_element(this);
 249     Atomic::dec(&JVMHistogram_lock);
 250   }
 251 
 252   #define JVMCountWrapper(arg) \
 253       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
 254       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
 255 
 256   #define JVMWrapper(arg) JVMCountWrapper(arg);
 257 #else
 258   #define JVMWrapper(arg)
 259 #endif
 260 
 261 
 262 // Interface version /////////////////////////////////////////////////////////////////////
 263 
 264 
 265 JVM_LEAF(jint, JVM_GetInterfaceVersion())
 266   return JVM_INTERFACE_VERSION;
 267 JVM_END
 268 
 269 
 270 // java.lang.System //////////////////////////////////////////////////////////////////////
 271 
 272 
 273 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 274   JVMWrapper("JVM_CurrentTimeMillis");
 275   return os::javaTimeMillis();
 276 JVM_END
 277 
 278 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
 279   JVMWrapper("JVM_NanoTime");
 280   return os::javaTimeNanos();
 281 JVM_END
 282 
 283 // The function below is actually exposed by jdk.internal.misc.VM and not
 284 // java.lang.System, but we choose to keep it here so that it stays next
 285 // to JVM_CurrentTimeMillis and JVM_NanoTime
 286 
 287 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); //  2^32
 288 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
 289 
 290 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
 291   JVMWrapper("JVM_GetNanoTimeAdjustment");
 292   jlong seconds;
 293   jlong nanos;
 294 
 295   os::javaTimeSystemUTC(seconds, nanos);
 296 
 297   // We're going to verify that the result can fit in a long.
 298   // For that we need the difference in seconds between 'seconds'
 299   // and 'offset_secs' to be such that:
 300   //     |seconds - offset_secs| < (2^63/10^9)
 301   // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
 302   // which makes |seconds - offset_secs| < 2^33
 303   // and we will prefer +/- 2^32 as the maximum acceptable diff
 304   // as 2^32 has a more natural feel than 2^33...
 305   //
 306   // So if |seconds - offset_secs| >= 2^32 - we return a special
 307   // sentinel value (-1) which the caller should take as an
 308   // exception value indicating that the offset given to us is
 309   // too far from range of the current time - leading to too big
 310   // a nano adjustment. The caller is expected to recover by
 311   // computing a more accurate offset and calling this method
 312   // again. (For the record 2^32 secs is ~136 years, so that
 313   // should rarely happen)
 314   //
 315   jlong diff = seconds - offset_secs;
 316   if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
 317      return -1; // sentinel value: the offset is too far off the target
 318   }
 319 
 320   // return the adjustment. If you compute a time by adding
 321   // this number of nanoseconds along with the number of seconds
 322   // in the offset you should get the current UTC time.
 323   return (diff * (jlong)1000000000) + nanos;
 324 JVM_END
 325 
 326 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 327                                jobject dst, jint dst_pos, jint length))
 328   JVMWrapper("JVM_ArrayCopy");
 329   // Check if we have null pointers
 330   if (src == NULL || dst == NULL) {
 331     THROW(vmSymbols::java_lang_NullPointerException());
 332   }
 333   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 334   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 335   assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
 336   assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
 337   // Do copy
 338   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 339 JVM_END
 340 
 341 
 342 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 343   JavaValue r(T_OBJECT);
 344   // public synchronized Object put(Object key, Object value);
 345   HandleMark hm(THREAD);
 346   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 347   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
 348   JavaCalls::call_virtual(&r,
 349                           props,
 350                           SystemDictionary::Properties_klass(),
 351                           vmSymbols::put_name(),
 352                           vmSymbols::object_object_object_signature(),
 353                           key_str,
 354                           value_str,
 355                           THREAD);
 356 }
 357 
 358 
 359 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 360 
 361 /*
 362  * Return all of the system properties in a Java String array with alternating
 363  * names and values from the jvm SystemProperty.
 364  * Which includes some internal and all commandline -D defined properties.
 365  */
 366 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
 367   JVMWrapper("JVM_GetProperties");
 368   ResourceMark rm(THREAD);
 369   HandleMark hm(THREAD);
 370   int ndx = 0;
 371   int fixedCount = 2;
 372 
 373   SystemProperty* p = Arguments::system_properties();
 374   int count = Arguments::PropertyList_count(p);
 375 
 376   // Allocate result String array
 377   InstanceKlass* ik = SystemDictionary::String_klass();
 378   objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
 379   objArrayHandle result_h(THREAD, r);
 380 
 381   while (p != NULL) {
 382     const char * key = p->key();
 383     if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
 384         const char * value = p->value();
 385         Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
 386         Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
 387         result_h->obj_at_put(ndx * 2,  key_str());
 388         result_h->obj_at_put(ndx * 2 + 1, value_str());
 389         ndx++;
 390     }
 391     p = p->next();
 392   }
 393 
 394   // Convert the -XX:MaxDirectMemorySize= command line flag
 395   // to the sun.nio.MaxDirectMemorySize property.
 396   // Do this after setting user properties to prevent people
 397   // from setting the value with a -D option, as requested.
 398   // Leave empty if not supplied
 399   if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 400     char as_chars[256];
 401     jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
 402     Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
 403     Handle value_str  = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
 404     result_h->obj_at_put(ndx * 2,  key_str());
 405     result_h->obj_at_put(ndx * 2 + 1, value_str());
 406     ndx++;
 407   }
 408 
 409   // JVM monitoring and management support
 410   // Add the sun.management.compiler property for the compiler's name
 411   {
 412 #undef CSIZE
 413 #if defined(_LP64) || defined(_WIN64)
 414   #define CSIZE "64-Bit "
 415 #else
 416   #define CSIZE
 417 #endif // 64bit
 418 
 419 #ifdef TIERED
 420     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 421 #else
 422 #if defined(COMPILER1)
 423     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 424 #elif defined(COMPILER2)
 425     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 426 #elif INCLUDE_JVMCI
 427     #error "INCLUDE_JVMCI should imply TIERED"
 428 #else
 429     const char* compiler_name = "";
 430 #endif // compilers
 431 #endif // TIERED
 432 
 433     if (*compiler_name != '\0' &&
 434         (Arguments::mode() != Arguments::_int)) {
 435       Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
 436       Handle value_str  = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
 437       result_h->obj_at_put(ndx * 2,  key_str());
 438       result_h->obj_at_put(ndx * 2 + 1, value_str());
 439       ndx++;
 440     }
 441   }
 442 
 443   return (jobjectArray) JNIHandles::make_local(env, result_h());
 444 JVM_END
 445 
 446 
 447 /*
 448  * Return the temporary directory that the VM uses for the attach
 449  * and perf data files.
 450  *
 451  * It is important that this directory is well-known and the
 452  * same for all VM instances. It cannot be affected by configuration
 453  * variables such as java.io.tmpdir.
 454  */
 455 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
 456   JVMWrapper("JVM_GetTemporaryDirectory");
 457   HandleMark hm(THREAD);
 458   const char* temp_dir = os::get_temp_directory();
 459   Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
 460   return (jstring) JNIHandles::make_local(env, h());
 461 JVM_END
 462 
 463 
 464 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 465 
 466 extern volatile jint vm_created;
 467 
 468 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
 469   JVMWrapper("JVM_BeforeHalt");
 470   EventShutdown event;
 471   if (event.should_commit()) {
 472     event.set_reason("Shutdown requested from Java");
 473     event.commit();
 474   }
 475 JVM_END
 476 
 477 
 478 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
 479   before_exit(thread);
 480   vm_exit(code);
 481 JVM_END
 482 
 483 
 484 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
 485   JVMWrapper("JVM_GC");
 486   if (!DisableExplicitGC) {
 487     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 488   }
 489 JVM_END
 490 
 491 
 492 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
 493   JVMWrapper("JVM_MaxObjectInspectionAge");
 494   return Universe::heap()->millis_since_last_gc();
 495 JVM_END
 496 
 497 
 498 static inline jlong convert_size_t_to_jlong(size_t val) {
 499   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 500   NOT_LP64 (return (jlong)val;)
 501   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 502 }
 503 
 504 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
 505   JVMWrapper("JVM_TotalMemory");
 506   size_t n = Universe::heap()->capacity();
 507   return convert_size_t_to_jlong(n);
 508 JVM_END
 509 
 510 
 511 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
 512   JVMWrapper("JVM_FreeMemory");
 513   size_t n = Universe::heap()->unused();
 514   return convert_size_t_to_jlong(n);
 515 JVM_END
 516 
 517 
 518 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
 519   JVMWrapper("JVM_MaxMemory");
 520   size_t n = Universe::heap()->max_capacity();
 521   return convert_size_t_to_jlong(n);
 522 JVM_END
 523 
 524 
 525 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
 526   JVMWrapper("JVM_ActiveProcessorCount");
 527   return os::active_processor_count();
 528 JVM_END
 529 
 530 
 531 
 532 // java.lang.Throwable //////////////////////////////////////////////////////
 533 
 534 
 535 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
 536   JVMWrapper("JVM_FillInStackTrace");
 537   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
 538   java_lang_Throwable::fill_in_stack_trace(exception);
 539 JVM_END
 540 
 541 
 542 // java.lang.StackTraceElement //////////////////////////////////////////////
 543 
 544 
 545 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
 546   JVMWrapper("JVM_InitStackTraceElementArray");
 547   Handle exception(THREAD, JNIHandles::resolve(throwable));
 548   objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
 549   objArrayHandle stack_trace(THREAD, st);
 550   // Fill in the allocated stack trace
 551   java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
 552 JVM_END
 553 
 554 
 555 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
 556   JVMWrapper("JVM_InitStackTraceElement");
 557   Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
 558   Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
 559   java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
 560 JVM_END
 561 
 562 
 563 // java.lang.StackWalker //////////////////////////////////////////////////////
 564 
 565 
 566 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
 567                                      jint skip_frames, jint frame_count, jint start_index,
 568                                      jobjectArray frames))
 569   JVMWrapper("JVM_CallStackWalk");
 570   JavaThread* jt = (JavaThread*) THREAD;
 571   if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
 572     THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
 573   }
 574 
 575   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 576 
 577   // frames array is a Class<?>[] array when only getting caller reference,
 578   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 579   // be null.
 580   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 581   objArrayHandle frames_array_h(THREAD, fa);
 582 
 583   int limit = start_index + frame_count;
 584   if (frames_array_h->length() < limit) {
 585     THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
 586   }
 587 
 588   oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
 589                                start_index, frames_array_h, CHECK_NULL);
 590   return JNIHandles::make_local(env, result);
 591 JVM_END
 592 
 593 
 594 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
 595                                   jint frame_count, jint start_index,
 596                                   jobjectArray frames))
 597   JVMWrapper("JVM_MoreStackWalk");
 598   JavaThread* jt = (JavaThread*) THREAD;
 599 
 600   // frames array is a Class<?>[] array when only getting caller reference,
 601   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 602   // be null.
 603   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 604   objArrayHandle frames_array_h(THREAD, fa);
 605 
 606   int limit = start_index+frame_count;
 607   if (frames_array_h->length() < limit) {
 608     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
 609   }
 610 
 611   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 612   return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
 613                                    start_index, frames_array_h, THREAD);
 614 JVM_END
 615 
 616 // java.lang.Object ///////////////////////////////////////////////
 617 
 618 
 619 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 620   JVMWrapper("JVM_IHashCode");
 621   // as implemented in the classic virtual machine; return 0 if object is NULL
 622   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 623 JVM_END
 624 
 625 
 626 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 627   JVMWrapper("JVM_MonitorWait");
 628   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 629   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 630   if (JvmtiExport::should_post_monitor_wait()) {
 631     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 632 
 633     // The current thread already owns the monitor and it has not yet
 634     // been added to the wait queue so the current thread cannot be
 635     // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
 636     // event handler cannot accidentally consume an unpark() meant for
 637     // the ParkEvent associated with this ObjectMonitor.
 638   }
 639   ObjectSynchronizer::wait(obj, ms, CHECK);
 640 JVM_END
 641 
 642 
 643 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 644   JVMWrapper("JVM_MonitorNotify");
 645   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 646   ObjectSynchronizer::notify(obj, CHECK);
 647 JVM_END
 648 
 649 
 650 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 651   JVMWrapper("JVM_MonitorNotifyAll");
 652   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 653   ObjectSynchronizer::notifyall(obj, CHECK);
 654 JVM_END
 655 
 656 
 657 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 658   JVMWrapper("JVM_Clone");
 659   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 660   Klass* klass = obj->klass();
 661   JvmtiVMObjectAllocEventCollector oam;
 662 
 663 #ifdef ASSERT
 664   // Just checking that the cloneable flag is set correct
 665   if (obj->is_array()) {
 666     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 667   } else {
 668     guarantee(obj->is_instance(), "should be instanceOop");
 669     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 670     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 671   }
 672 #endif
 673 
 674   // Check if class of obj supports the Cloneable interface.
 675   // All arrays are considered to be cloneable (See JLS 20.1.5).
 676   // All j.l.r.Reference classes are considered non-cloneable.
 677   if (!klass->is_cloneable() ||
 678       (klass->is_instance_klass() &&
 679        InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
 680     ResourceMark rm(THREAD);
 681     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 682   }
 683 
 684   // Make shallow object copy
 685   const int size = obj->size();
 686   oop new_obj_oop = NULL;
 687   if (obj->is_array()) {
 688     const int length = ((arrayOop)obj())->length();
 689     new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
 690                                                    /* do_zero */ true, CHECK_NULL);
 691   } else {
 692     new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
 693   }
 694 
 695   HeapAccess<>::clone(obj(), new_obj_oop, size);
 696 
 697   Handle new_obj(THREAD, new_obj_oop);
 698   // Caution: this involves a java upcall, so the clone should be
 699   // "gc-robust" by this stage.
 700   if (klass->has_finalizer()) {
 701     assert(obj->is_instance(), "should be instanceOop");
 702     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
 703     new_obj = Handle(THREAD, new_obj_oop);
 704   }
 705 
 706   return JNIHandles::make_local(env, new_obj());
 707 JVM_END
 708 
 709 // java.io.File ///////////////////////////////////////////////////////////////
 710 
 711 JVM_LEAF(char*, JVM_NativePath(char* path))
 712   JVMWrapper("JVM_NativePath");
 713   return os::native_path(path);
 714 JVM_END
 715 
 716 
 717 // Misc. class handling ///////////////////////////////////////////////////////////
 718 
 719 
 720 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
 721   JVMWrapper("JVM_GetCallerClass");
 722 
 723   // Getting the class of the caller frame.
 724   //
 725   // The call stack at this point looks something like this:
 726   //
 727   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 728   // [1] [ @CallerSensitive API.method                                   ]
 729   // [.] [ (skipped intermediate frames)                                 ]
 730   // [n] [ caller                                                        ]
 731   vframeStream vfst(thread);
 732   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 733   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 734     Method* m = vfst.method();
 735     assert(m != NULL, "sanity");
 736     switch (n) {
 737     case 0:
 738       // This must only be called from Reflection.getCallerClass
 739       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 740         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 741       }
 742       // fall-through
 743     case 1:
 744       // Frame 0 and 1 must be caller sensitive.
 745       if (!m->caller_sensitive()) {
 746         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 747       }
 748       break;
 749     default:
 750       if (!m->is_ignored_by_security_stack_walk()) {
 751         // We have reached the desired frame; return the holder class.
 752         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 753       }
 754       break;
 755     }
 756   }
 757   return NULL;
 758 JVM_END
 759 
 760 
 761 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 762   JVMWrapper("JVM_FindPrimitiveClass");
 763   oop mirror = NULL;
 764   BasicType t = name2type(utf);
 765   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
 766     mirror = Universe::java_mirror(t);
 767   }
 768   if (mirror == NULL) {
 769     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 770   } else {
 771     return (jclass) JNIHandles::make_local(env, mirror);
 772   }
 773 JVM_END
 774 
 775 
 776 // Returns a class loaded by the bootstrap class loader; or null
 777 // if not found.  ClassNotFoundException is not thrown.
 778 // FindClassFromBootLoader is exported to the launcher for windows.
 779 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 780                                               const char* name))
 781   JVMWrapper("JVM_FindClassFromBootLoader");
 782 
 783   // Java libraries should ensure that name is never null...
 784   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 785     // It's impossible to create this class;  the name cannot fit
 786     // into the constant pool.
 787     return NULL;
 788   }
 789 
 790   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 791   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 792   if (k == NULL) {
 793     return NULL;
 794   }
 795 
 796   if (log_is_enabled(Debug, class, resolve)) {
 797     trace_class_resolution(k);
 798   }
 799   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 800 JVM_END
 801 
 802 // Find a class with this name in this loader, using the caller's protection domain.
 803 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
 804                                           jboolean init, jobject loader,
 805                                           jclass caller))
 806   JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
 807   // Java libraries should ensure that name is never null...
 808   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 809     // It's impossible to create this class;  the name cannot fit
 810     // into the constant pool.
 811     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 812   }
 813 
 814   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 815 
 816   oop loader_oop = JNIHandles::resolve(loader);
 817   oop from_class = JNIHandles::resolve(caller);
 818   oop protection_domain = NULL;
 819   // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
 820   // NPE. Put it in another way, the bootstrap class loader has all permission and
 821   // thus no checkPackageAccess equivalence in the VM class loader.
 822   // The caller is also passed as NULL by the java code if there is no security
 823   // manager to avoid the performance cost of getting the calling class.
 824   if (from_class != NULL && loader_oop != NULL) {
 825     protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
 826   }
 827 
 828   Handle h_loader(THREAD, loader_oop);
 829   Handle h_prot(THREAD, protection_domain);
 830   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 831                                                h_prot, false, THREAD);
 832 
 833   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 834     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 835   }
 836   return result;
 837 JVM_END
 838 
 839 // Currently only called from the old verifier.
 840 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 841                                          jboolean init, jclass from))
 842   JVMWrapper("JVM_FindClassFromClass");
 843   if (name == NULL) {
 844     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 845   }
 846   if ((int)strlen(name) > Symbol::max_length()) {
 847     // It's impossible to create this class;  the name cannot fit
 848     // into the constant pool.
 849     Exceptions::fthrow(THREAD_AND_LOCATION,
 850                        vmSymbols::java_lang_NoClassDefFoundError(),
 851                        "Class name exceeds maximum length of %d: %s",
 852                        Symbol::max_length(),
 853                        name);
 854     return 0;
 855   }
 856   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 857   oop from_class_oop = JNIHandles::resolve(from);
 858   Klass* from_class = (from_class_oop == NULL)
 859                            ? (Klass*)NULL
 860                            : java_lang_Class::as_Klass(from_class_oop);
 861   oop class_loader = NULL;
 862   oop protection_domain = NULL;
 863   if (from_class != NULL) {
 864     class_loader = from_class->class_loader();
 865     protection_domain = from_class->protection_domain();
 866   }
 867   Handle h_loader(THREAD, class_loader);
 868   Handle h_prot  (THREAD, protection_domain);
 869   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 870                                                h_prot, true, thread);
 871 
 872   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 873     // this function is generally only used for class loading during verification.
 874     ResourceMark rm;
 875     oop from_mirror = JNIHandles::resolve_non_null(from);
 876     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 877     const char * from_name = from_class->external_name();
 878 
 879     oop mirror = JNIHandles::resolve_non_null(result);
 880     Klass* to_class = java_lang_Class::as_Klass(mirror);
 881     const char * to = to_class->external_name();
 882     log_debug(class, resolve)("%s %s (verification)", from_name, to);
 883   }
 884 
 885   return result;
 886 JVM_END
 887 
 888 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 889   if (loader.is_null()) {
 890     return;
 891   }
 892 
 893   // check whether the current caller thread holds the lock or not.
 894   // If not, increment the corresponding counter
 895   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 896       ObjectSynchronizer::owner_self) {
 897     counter->inc();
 898   }
 899 }
 900 
 901 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 902 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 903                                       jobject loader, const jbyte *buf,
 904                                       jsize len, jobject pd, const char *source,
 905                                       TRAPS) {
 906   if (source == NULL)  source = "__JVM_DefineClass__";
 907 
 908   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 909   JavaThread* jt = (JavaThread*) THREAD;
 910 
 911   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 912                              ClassLoader::perf_define_appclass_selftime(),
 913                              ClassLoader::perf_define_appclasses(),
 914                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 915                              jt->get_thread_stat()->perf_timers_addr(),
 916                              PerfClassTraceTime::DEFINE_CLASS);
 917 
 918   if (UsePerfData) {
 919     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 920   }
 921 
 922   // Since exceptions can be thrown, class initialization can take place
 923   // if name is NULL no check for class name in .class stream has to be made.
 924   TempNewSymbol class_name = NULL;
 925   if (name != NULL) {
 926     const int str_len = (int)strlen(name);
 927     if (str_len > Symbol::max_length()) {
 928       // It's impossible to create this class;  the name cannot fit
 929       // into the constant pool.
 930       Exceptions::fthrow(THREAD_AND_LOCATION,
 931                          vmSymbols::java_lang_NoClassDefFoundError(),
 932                          "Class name exceeds maximum length of %d: %s",
 933                          Symbol::max_length(),
 934                          name);
 935       return 0;
 936     }
 937     class_name = SymbolTable::new_symbol(name, str_len);
 938   }
 939 
 940   ResourceMark rm(THREAD);
 941   ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
 942   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 943   if (UsePerfData) {
 944     is_lock_held_by_thread(class_loader,
 945                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
 946                            THREAD);
 947   }
 948   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 949   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 950                                                    class_loader,
 951                                                    protection_domain,
 952                                                    &st,
 953                                                    CHECK_NULL);
 954 
 955   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 956     trace_class_resolution(k);
 957   }
 958 
 959   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 960 }
 961 
 962 
 963 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
 964   JVMWrapper("JVM_DefineClass");
 965 
 966   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
 967 JVM_END
 968 
 969 
 970 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
 971   JVMWrapper("JVM_DefineClassWithSource");
 972 
 973   return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
 974 JVM_END
 975 
 976 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
 977   JVMWrapper("JVM_FindLoadedClass");
 978   ResourceMark rm(THREAD);
 979 
 980   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
 981   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
 982 
 983   const char* str   = java_lang_String::as_utf8_string(string());
 984   // Sanity check, don't expect null
 985   if (str == NULL) return NULL;
 986 
 987   const int str_len = (int)strlen(str);
 988   if (str_len > Symbol::max_length()) {
 989     // It's impossible to create this class;  the name cannot fit
 990     // into the constant pool.
 991     return NULL;
 992   }
 993   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
 994 
 995   // Security Note:
 996   //   The Java level wrapper will perform the necessary security check allowing
 997   //   us to pass the NULL as the initiating class loader.
 998   Handle h_loader(THREAD, JNIHandles::resolve(loader));
 999   if (UsePerfData) {
1000     is_lock_held_by_thread(h_loader,
1001                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1002                            THREAD);
1003   }
1004 
1005   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1006                                                               h_loader,
1007                                                               Handle(),
1008                                                               CHECK_NULL);
1009 #if INCLUDE_CDS
1010   if (k == NULL) {
1011     // If the class is not already loaded, try to see if it's in the shared
1012     // archive for the current classloader (h_loader).
1013     k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1014   }
1015 #endif
1016   return (k == NULL) ? NULL :
1017             (jclass) JNIHandles::make_local(env, k->java_mirror());
1018 JVM_END
1019 
1020 // Module support //////////////////////////////////////////////////////////////////////////////
1021 
1022 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1023                                  jstring location, const char* const* packages, jsize num_packages))
1024   JVMWrapper("JVM_DefineModule");
1025   Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1026 JVM_END
1027 
1028 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1029   JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1030   Modules::set_bootloader_unnamed_module(module, CHECK);
1031 JVM_END
1032 
1033 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1034   JVMWrapper("JVM_AddModuleExports");
1035   Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1036 JVM_END
1037 
1038 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1039   JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1040   Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1041 JVM_END
1042 
1043 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1044   JVMWrapper("JVM_AddModuleExportsToAll");
1045   Modules::add_module_exports(from_module, package, NULL, CHECK);
1046 JVM_END
1047 
1048 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1049   JVMWrapper("JVM_AddReadsModule");
1050   Modules::add_reads_module(from_module, source_module, CHECK);
1051 JVM_END
1052 
1053 // Reflection support //////////////////////////////////////////////////////////////////////////////
1054 
1055 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1056   assert (cls != NULL, "illegal class");
1057   JVMWrapper("JVM_InitClassName");
1058   JvmtiVMObjectAllocEventCollector oam;
1059   ResourceMark rm(THREAD);
1060   HandleMark hm(THREAD);
1061   Handle java_class(THREAD, JNIHandles::resolve(cls));
1062   oop result = java_lang_Class::name(java_class, CHECK_NULL);
1063   return (jstring) JNIHandles::make_local(env, result);
1064 JVM_END
1065 
1066 
1067 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1068   JVMWrapper("JVM_GetClassInterfaces");
1069   JvmtiVMObjectAllocEventCollector oam;
1070   oop mirror = JNIHandles::resolve_non_null(cls);
1071 
1072   // Special handling for primitive objects
1073   if (java_lang_Class::is_primitive(mirror)) {
1074     // Primitive objects does not have any interfaces
1075     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1076     return (jobjectArray) JNIHandles::make_local(env, r);
1077   }
1078 
1079   Klass* klass = java_lang_Class::as_Klass(mirror);
1080   // Figure size of result array
1081   int size;
1082   if (klass->is_instance_klass()) {
1083     size = InstanceKlass::cast(klass)->local_interfaces()->length();
1084   } else {
1085     assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1086     size = 2;
1087   }
1088 
1089   // Allocate result array
1090   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1091   objArrayHandle result (THREAD, r);
1092   // Fill in result
1093   if (klass->is_instance_klass()) {
1094     // Regular instance klass, fill in all local interfaces
1095     for (int index = 0; index < size; index++) {
1096       Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1097       result->obj_at_put(index, k->java_mirror());
1098     }
1099   } else {
1100     // All arrays implement java.lang.Cloneable and java.io.Serializable
1101     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1102     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1103   }
1104   return (jobjectArray) JNIHandles::make_local(env, result());
1105 JVM_END
1106 
1107 
1108 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1109   JVMWrapper("JVM_IsInterface");
1110   oop mirror = JNIHandles::resolve_non_null(cls);
1111   if (java_lang_Class::is_primitive(mirror)) {
1112     return JNI_FALSE;
1113   }
1114   Klass* k = java_lang_Class::as_Klass(mirror);
1115   jboolean result = k->is_interface();
1116   assert(!result || k->is_instance_klass(),
1117          "all interfaces are instance types");
1118   // The compiler intrinsic for isInterface tests the
1119   // Klass::_access_flags bits in the same way.
1120   return result;
1121 JVM_END
1122 
1123 
1124 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1125   JVMWrapper("JVM_GetClassSigners");
1126   JvmtiVMObjectAllocEventCollector oam;
1127   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1128     // There are no signers for primitive types
1129     return NULL;
1130   }
1131 
1132   objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1133 
1134   // If there are no signers set in the class, or if the class
1135   // is an array, return NULL.
1136   if (signers == NULL) return NULL;
1137 
1138   // copy of the signers array
1139   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1140   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1141   for (int index = 0; index < signers->length(); index++) {
1142     signers_copy->obj_at_put(index, signers->obj_at(index));
1143   }
1144 
1145   // return the copy
1146   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1147 JVM_END
1148 
1149 
1150 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1151   JVMWrapper("JVM_SetClassSigners");
1152   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1153     // This call is ignored for primitive types and arrays.
1154     // Signers are only set once, ClassLoader.java, and thus shouldn't
1155     // be called with an array.  Only the bootstrap loader creates arrays.
1156     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1157     if (k->is_instance_klass()) {
1158       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1159     }
1160   }
1161 JVM_END
1162 
1163 
1164 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1165   JVMWrapper("JVM_GetProtectionDomain");
1166   if (JNIHandles::resolve(cls) == NULL) {
1167     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1168   }
1169 
1170   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1171     // Primitive types does not have a protection domain.
1172     return NULL;
1173   }
1174 
1175   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1176   return (jobject) JNIHandles::make_local(env, pd);
1177 JVM_END
1178 
1179 
1180 // Returns the inherited_access_control_context field of the running thread.
1181 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1182   JVMWrapper("JVM_GetInheritedAccessControlContext");
1183   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1184   return JNIHandles::make_local(env, result);
1185 JVM_END
1186 
1187 class RegisterArrayForGC {
1188  private:
1189   JavaThread *_thread;
1190  public:
1191   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1192     _thread = thread;
1193     _thread->register_array_for_gc(array);
1194   }
1195 
1196   ~RegisterArrayForGC() {
1197     _thread->register_array_for_gc(NULL);
1198   }
1199 };
1200 
1201 
1202 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1203   JVMWrapper("JVM_GetStackAccessControlContext");
1204   if (!UsePrivilegedStack) return NULL;
1205 
1206   ResourceMark rm(THREAD);
1207   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1208   JvmtiVMObjectAllocEventCollector oam;
1209 
1210   // count the protection domains on the execution stack. We collapse
1211   // duplicate consecutive protection domains into a single one, as
1212   // well as stopping when we hit a privileged frame.
1213 
1214   oop previous_protection_domain = NULL;
1215   Handle privileged_context(thread, NULL);
1216   bool is_privileged = false;
1217   oop protection_domain = NULL;
1218 
1219   // Iterate through Java frames
1220   vframeStream vfst(thread);
1221   for(; !vfst.at_end(); vfst.next()) {
1222     // get method of frame
1223     Method* method = vfst.method();
1224 
1225     // stop at the first privileged frame
1226     if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1227       method->name() == vmSymbols::executePrivileged_name())
1228     {
1229       // this frame is privileged
1230       is_privileged = true;
1231 
1232       javaVFrame *priv = vfst.asJavaVFrame();       // executePrivileged
1233 
1234       StackValueCollection* locals = priv->locals();
1235       StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1236       StackValue* clr_sv = locals->at(2); // Class<?> caller
1237       assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1238       assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1239       privileged_context    = ctx_sv->get_obj();
1240       Handle caller         = clr_sv->get_obj();
1241 
1242       Klass *caller_klass = java_lang_Class::as_Klass(caller());
1243       protection_domain  = caller_klass->protection_domain();
1244     } else {
1245       protection_domain = method->method_holder()->protection_domain();
1246     }
1247 
1248     if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1249       local_array->push(protection_domain);
1250       previous_protection_domain = protection_domain;
1251     }
1252 
1253     if (is_privileged) break;
1254   }
1255 
1256 
1257   // either all the domains on the stack were system domains, or
1258   // we had a privileged system domain
1259   if (local_array->is_empty()) {
1260     if (is_privileged && privileged_context.is_null()) return NULL;
1261 
1262     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1263     return JNIHandles::make_local(env, result);
1264   }
1265 
1266   // the resource area must be registered in case of a gc
1267   RegisterArrayForGC ragc(thread, local_array);
1268   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1269                                                  local_array->length(), CHECK_NULL);
1270   objArrayHandle h_context(thread, context);
1271   for (int index = 0; index < local_array->length(); index++) {
1272     h_context->obj_at_put(index, local_array->at(index));
1273   }
1274 
1275   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1276 
1277   return JNIHandles::make_local(env, result);
1278 JVM_END
1279 
1280 
1281 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1282   JVMWrapper("JVM_IsArrayClass");
1283   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1284   return (k != NULL) && k->is_array_klass() ? true : false;
1285 JVM_END
1286 
1287 
1288 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1289   JVMWrapper("JVM_IsPrimitiveClass");
1290   oop mirror = JNIHandles::resolve_non_null(cls);
1291   return (jboolean) java_lang_Class::is_primitive(mirror);
1292 JVM_END
1293 
1294 
1295 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1296   JVMWrapper("JVM_GetClassModifiers");
1297   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1298     // Primitive type
1299     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1300   }
1301 
1302   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1303   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1304   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1305   return k->modifier_flags();
1306 JVM_END
1307 
1308 
1309 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1310 
1311 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1312   JvmtiVMObjectAllocEventCollector oam;
1313   // ofClass is a reference to a java_lang_Class object. The mirror object
1314   // of an InstanceKlass
1315 
1316   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1317       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1318     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1319     return (jobjectArray)JNIHandles::make_local(env, result);
1320   }
1321 
1322   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1323   InnerClassesIterator iter(k);
1324 
1325   if (iter.length() == 0) {
1326     // Neither an inner nor outer class
1327     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1328     return (jobjectArray)JNIHandles::make_local(env, result);
1329   }
1330 
1331   // find inner class info
1332   constantPoolHandle cp(thread, k->constants());
1333   int length = iter.length();
1334 
1335   // Allocate temp. result array
1336   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1337   objArrayHandle result (THREAD, r);
1338   int members = 0;
1339 
1340   for (; !iter.done(); iter.next()) {
1341     int ioff = iter.inner_class_info_index();
1342     int ooff = iter.outer_class_info_index();
1343 
1344     if (ioff != 0 && ooff != 0) {
1345       // Check to see if the name matches the class we're looking for
1346       // before attempting to find the class.
1347       if (cp->klass_name_at_matches(k, ooff)) {
1348         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1349         if (outer_klass == k) {
1350            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1351            InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1352 
1353            // Throws an exception if outer klass has not declared k as
1354            // an inner klass
1355            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1356 
1357            result->obj_at_put(members, inner_klass->java_mirror());
1358            members++;
1359         }
1360       }
1361     }
1362   }
1363 
1364   if (members != length) {
1365     // Return array of right length
1366     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1367     for(int i = 0; i < members; i++) {
1368       res->obj_at_put(i, result->obj_at(i));
1369     }
1370     return (jobjectArray)JNIHandles::make_local(env, res);
1371   }
1372 
1373   return (jobjectArray)JNIHandles::make_local(env, result());
1374 JVM_END
1375 
1376 
1377 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1378 {
1379   // ofClass is a reference to a java_lang_Class object.
1380   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1381       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1382     return NULL;
1383   }
1384 
1385   bool inner_is_member = false;
1386   Klass* outer_klass
1387     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1388                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1389   if (outer_klass == NULL)  return NULL;  // already a top-level class
1390   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1391   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1392 }
1393 JVM_END
1394 
1395 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1396 {
1397   oop mirror = JNIHandles::resolve_non_null(cls);
1398   if (java_lang_Class::is_primitive(mirror) ||
1399       !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1400     return NULL;
1401   }
1402   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1403   int ooff = 0, noff = 0;
1404   if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1405     if (noff != 0) {
1406       constantPoolHandle i_cp(thread, k->constants());
1407       Symbol* name = i_cp->symbol_at(noff);
1408       Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1409       return (jstring) JNIHandles::make_local(env, str());
1410     }
1411   }
1412   return NULL;
1413 }
1414 JVM_END
1415 
1416 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1417   assert (cls != NULL, "illegal class");
1418   JVMWrapper("JVM_GetClassSignature");
1419   JvmtiVMObjectAllocEventCollector oam;
1420   ResourceMark rm(THREAD);
1421   // Return null for arrays and primatives
1422   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1423     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1424     if (k->is_instance_klass()) {
1425       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1426       if (sym == NULL) return NULL;
1427       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1428       return (jstring) JNIHandles::make_local(env, str());
1429     }
1430   }
1431   return NULL;
1432 JVM_END
1433 
1434 
1435 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1436   assert (cls != NULL, "illegal class");
1437   JVMWrapper("JVM_GetClassAnnotations");
1438 
1439   // Return null for arrays and primitives
1440   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1441     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1442     if (k->is_instance_klass()) {
1443       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1444       return (jbyteArray) JNIHandles::make_local(env, a);
1445     }
1446   }
1447   return NULL;
1448 JVM_END
1449 
1450 
1451 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1452   // some of this code was adapted from from jni_FromReflectedField
1453 
1454   oop reflected = JNIHandles::resolve_non_null(field);
1455   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1456   Klass* k    = java_lang_Class::as_Klass(mirror);
1457   int slot      = java_lang_reflect_Field::slot(reflected);
1458   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1459 
1460   InstanceKlass* ik = InstanceKlass::cast(k);
1461   intptr_t offset = ik->field_offset(slot);
1462 
1463   if (modifiers & JVM_ACC_STATIC) {
1464     // for static fields we only look in the current class
1465     if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1466       assert(false, "cannot find static field");
1467       return false;
1468     }
1469   } else {
1470     // for instance fields we start with the current class and work
1471     // our way up through the superclass chain
1472     if (!ik->find_field_from_offset(offset, false, &fd)) {
1473       assert(false, "cannot find instance field");
1474       return false;
1475     }
1476   }
1477   return true;
1478 }
1479 
1480 static Method* jvm_get_method_common(jobject method) {
1481   // some of this code was adapted from from jni_FromReflectedMethod
1482 
1483   oop reflected = JNIHandles::resolve_non_null(method);
1484   oop mirror    = NULL;
1485   int slot      = 0;
1486 
1487   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1488     mirror = java_lang_reflect_Constructor::clazz(reflected);
1489     slot   = java_lang_reflect_Constructor::slot(reflected);
1490   } else {
1491     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1492            "wrong type");
1493     mirror = java_lang_reflect_Method::clazz(reflected);
1494     slot   = java_lang_reflect_Method::slot(reflected);
1495   }
1496   Klass* k = java_lang_Class::as_Klass(mirror);
1497 
1498   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1499   assert(m != NULL, "cannot find method");
1500   return m;  // caller has to deal with NULL in product mode
1501 }
1502 
1503 /* Type use annotations support (JDK 1.8) */
1504 
1505 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1506   assert (cls != NULL, "illegal class");
1507   JVMWrapper("JVM_GetClassTypeAnnotations");
1508   ResourceMark rm(THREAD);
1509   // Return null for arrays and primitives
1510   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1511     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1512     if (k->is_instance_klass()) {
1513       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1514       if (type_annotations != NULL) {
1515         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1516         return (jbyteArray) JNIHandles::make_local(env, a);
1517       }
1518     }
1519   }
1520   return NULL;
1521 JVM_END
1522 
1523 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1524   assert (method != NULL, "illegal method");
1525   JVMWrapper("JVM_GetMethodTypeAnnotations");
1526 
1527   // method is a handle to a java.lang.reflect.Method object
1528   Method* m = jvm_get_method_common(method);
1529   if (m == NULL) {
1530     return NULL;
1531   }
1532 
1533   AnnotationArray* type_annotations = m->type_annotations();
1534   if (type_annotations != NULL) {
1535     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1536     return (jbyteArray) JNIHandles::make_local(env, a);
1537   }
1538 
1539   return NULL;
1540 JVM_END
1541 
1542 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1543   assert (field != NULL, "illegal field");
1544   JVMWrapper("JVM_GetFieldTypeAnnotations");
1545 
1546   fieldDescriptor fd;
1547   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1548   if (!gotFd) {
1549     return NULL;
1550   }
1551 
1552   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1553 JVM_END
1554 
1555 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1556   if (!cp->is_within_bounds(index)) {
1557     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1558   }
1559 }
1560 
1561 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1562 {
1563   JVMWrapper("JVM_GetMethodParameters");
1564   // method is a handle to a java.lang.reflect.Method object
1565   Method* method_ptr = jvm_get_method_common(method);
1566   methodHandle mh (THREAD, method_ptr);
1567   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1568   const int num_params = mh->method_parameters_length();
1569 
1570   if (num_params < 0) {
1571     // A -1 return value from method_parameters_length means there is no
1572     // parameter data.  Return null to indicate this to the reflection
1573     // API.
1574     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1575     return (jobjectArray)NULL;
1576   } else {
1577     // Otherwise, we return something up to reflection, even if it is
1578     // a zero-length array.  Why?  Because in some cases this can
1579     // trigger a MalformedParametersException.
1580 
1581     // make sure all the symbols are properly formatted
1582     for (int i = 0; i < num_params; i++) {
1583       MethodParametersElement* params = mh->method_parameters_start();
1584       int index = params[i].name_cp_index;
1585       bounds_check(mh->constants(), index, CHECK_NULL);
1586 
1587       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1588         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1589                     "Wrong type at constant pool index");
1590       }
1591 
1592     }
1593 
1594     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1595     objArrayHandle result (THREAD, result_oop);
1596 
1597     for (int i = 0; i < num_params; i++) {
1598       MethodParametersElement* params = mh->method_parameters_start();
1599       // For a 0 index, give a NULL symbol
1600       Symbol* sym = 0 != params[i].name_cp_index ?
1601         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1602       int flags = params[i].flags;
1603       oop param = Reflection::new_parameter(reflected_method, i, sym,
1604                                             flags, CHECK_NULL);
1605       result->obj_at_put(i, param);
1606     }
1607     return (jobjectArray)JNIHandles::make_local(env, result());
1608   }
1609 }
1610 JVM_END
1611 
1612 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1613 
1614 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1615 {
1616   JVMWrapper("JVM_GetClassDeclaredFields");
1617   JvmtiVMObjectAllocEventCollector oam;
1618 
1619   // Exclude primitive types and array types
1620   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1621       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1622     // Return empty array
1623     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1624     return (jobjectArray) JNIHandles::make_local(env, res);
1625   }
1626 
1627   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1628   constantPoolHandle cp(THREAD, k->constants());
1629 
1630   // Ensure class is linked
1631   k->link_class(CHECK_NULL);
1632 
1633   // Allocate result
1634   int num_fields;
1635 
1636   if (publicOnly) {
1637     num_fields = 0;
1638     for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1639       if (fs.access_flags().is_public()) ++num_fields;
1640     }
1641   } else {
1642     num_fields = k->java_fields_count();
1643   }
1644 
1645   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1646   objArrayHandle result (THREAD, r);
1647 
1648   int out_idx = 0;
1649   fieldDescriptor fd;
1650   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1651     if (!publicOnly || fs.access_flags().is_public()) {
1652       fd.reinitialize(k, fs.index());
1653       oop field = Reflection::new_field(&fd, CHECK_NULL);
1654       result->obj_at_put(out_idx, field);
1655       ++out_idx;
1656     }
1657   }
1658   assert(out_idx == num_fields, "just checking");
1659   return (jobjectArray) JNIHandles::make_local(env, result());
1660 }
1661 JVM_END
1662 
1663 static bool select_method(const methodHandle& method, bool want_constructor) {
1664   if (want_constructor) {
1665     return (method->is_initializer() && !method->is_static());
1666   } else {
1667     return  (!method->is_initializer() && !method->is_overpass());
1668   }
1669 }
1670 
1671 static jobjectArray get_class_declared_methods_helper(
1672                                   JNIEnv *env,
1673                                   jclass ofClass, jboolean publicOnly,
1674                                   bool want_constructor,
1675                                   Klass* klass, TRAPS) {
1676 
1677   JvmtiVMObjectAllocEventCollector oam;
1678 
1679   // Exclude primitive types and array types
1680   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1681       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1682     // Return empty array
1683     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1684     return (jobjectArray) JNIHandles::make_local(env, res);
1685   }
1686 
1687   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1688 
1689   // Ensure class is linked
1690   k->link_class(CHECK_NULL);
1691 
1692   Array<Method*>* methods = k->methods();
1693   int methods_length = methods->length();
1694 
1695   // Save original method_idnum in case of redefinition, which can change
1696   // the idnum of obsolete methods.  The new method will have the same idnum
1697   // but if we refresh the methods array, the counts will be wrong.
1698   ResourceMark rm(THREAD);
1699   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1700   int num_methods = 0;
1701 
1702   for (int i = 0; i < methods_length; i++) {
1703     methodHandle method(THREAD, methods->at(i));
1704     if (select_method(method, want_constructor)) {
1705       if (!publicOnly || method->is_public()) {
1706         idnums->push(method->method_idnum());
1707         ++num_methods;
1708       }
1709     }
1710   }
1711 
1712   // Allocate result
1713   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1714   objArrayHandle result (THREAD, r);
1715 
1716   // Now just put the methods that we selected above, but go by their idnum
1717   // in case of redefinition.  The methods can be redefined at any safepoint,
1718   // so above when allocating the oop array and below when creating reflect
1719   // objects.
1720   for (int i = 0; i < num_methods; i++) {
1721     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1722     if (method.is_null()) {
1723       // Method may have been deleted and seems this API can handle null
1724       // Otherwise should probably put a method that throws NSME
1725       result->obj_at_put(i, NULL);
1726     } else {
1727       oop m;
1728       if (want_constructor) {
1729         m = Reflection::new_constructor(method, CHECK_NULL);
1730       } else {
1731         m = Reflection::new_method(method, false, CHECK_NULL);
1732       }
1733       result->obj_at_put(i, m);
1734     }
1735   }
1736 
1737   return (jobjectArray) JNIHandles::make_local(env, result());
1738 }
1739 
1740 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1741 {
1742   JVMWrapper("JVM_GetClassDeclaredMethods");
1743   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1744                                            /*want_constructor*/ false,
1745                                            SystemDictionary::reflect_Method_klass(), THREAD);
1746 }
1747 JVM_END
1748 
1749 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1750 {
1751   JVMWrapper("JVM_GetClassDeclaredConstructors");
1752   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1753                                            /*want_constructor*/ true,
1754                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
1755 }
1756 JVM_END
1757 
1758 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1759 {
1760   JVMWrapper("JVM_GetClassAccessFlags");
1761   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1762     // Primitive type
1763     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1764   }
1765 
1766   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1767   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1768 }
1769 JVM_END
1770 
1771 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1772 {
1773   JVMWrapper("JVM_AreNestMates");
1774   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1775   assert(c->is_instance_klass(), "must be");
1776   InstanceKlass* ck = InstanceKlass::cast(c);
1777   Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1778   assert(m->is_instance_klass(), "must be");
1779   InstanceKlass* mk = InstanceKlass::cast(m);
1780   return ck->has_nestmate_access_to(mk, THREAD);
1781 }
1782 JVM_END
1783 
1784 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1785 {
1786   // current is not a primitive or array class
1787   JVMWrapper("JVM_GetNestHost");
1788   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1789   assert(c->is_instance_klass(), "must be");
1790   InstanceKlass* ck = InstanceKlass::cast(c);
1791   // Don't post exceptions if validation fails
1792   InstanceKlass* host = ck->nest_host(NULL, THREAD);
1793   return (jclass) (host == NULL ? NULL :
1794                    JNIHandles::make_local(THREAD, host->java_mirror()));
1795 }
1796 JVM_END
1797 
1798 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1799 {
1800   // current is not a primitive or array class
1801   JVMWrapper("JVM_GetNestMembers");
1802   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1803   assert(c->is_instance_klass(), "must be");
1804   InstanceKlass* ck = InstanceKlass::cast(c);
1805   // Get the nest host for this nest - throw ICCE if validation fails
1806   Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1807   InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1808 
1809   {
1810     JvmtiVMObjectAllocEventCollector oam;
1811     Array<u2>* members = host->nest_members();
1812     int length = members == NULL ? 0 : members->length();
1813     // nest host is first in the array so make it one bigger
1814     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1815                                              length + 1, CHECK_NULL);
1816     objArrayHandle result (THREAD, r);
1817     result->obj_at_put(0, host->java_mirror());
1818     if (length != 0) {
1819       int i;
1820       for (i = 0; i < length; i++) {
1821          int cp_index = members->at(i);
1822          Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1823          if (k->is_instance_klass()) {
1824            InstanceKlass* nest_host_k =
1825              InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1826            if (nest_host_k == host) {
1827              result->obj_at_put(i+1, k->java_mirror());
1828            }
1829            else {
1830              // k's nest host is legal but it isn't our host so
1831              // throw ICCE
1832              ResourceMark rm(THREAD);
1833              Exceptions::fthrow(THREAD_AND_LOCATION,
1834                                 icce,
1835                                 "Nest member %s in %s declares a different nest host of %s",
1836                                 k->external_name(),
1837                                 host->external_name(),
1838                                 nest_host_k->external_name()
1839                            );
1840              return NULL;
1841            }
1842          }
1843          else {
1844            // we have a bad nest member entry - throw ICCE
1845            ResourceMark rm(THREAD);
1846            Exceptions::fthrow(THREAD_AND_LOCATION,
1847                               icce,
1848                               "Class %s can not be a nest member of %s",
1849                               k->external_name(),
1850                               host->external_name()
1851                               );
1852            return NULL;
1853          }
1854       }
1855     }
1856     else {
1857       assert(host == ck, "must be singleton nest");
1858     }
1859     return (jobjectArray)JNIHandles::make_local(THREAD, result());
1860   }
1861 }
1862 JVM_END
1863 
1864 // Constant pool access //////////////////////////////////////////////////////////
1865 
1866 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1867 {
1868   JVMWrapper("JVM_GetClassConstantPool");
1869   JvmtiVMObjectAllocEventCollector oam;
1870 
1871   // Return null for primitives and arrays
1872   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1873     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1874     if (k->is_instance_klass()) {
1875       InstanceKlass* k_h = InstanceKlass::cast(k);
1876       Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1877       reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1878       return JNIHandles::make_local(jcp());
1879     }
1880   }
1881   return NULL;
1882 }
1883 JVM_END
1884 
1885 
1886 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1887 {
1888   JVMWrapper("JVM_ConstantPoolGetSize");
1889   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1890   return cp->length();
1891 }
1892 JVM_END
1893 
1894 
1895 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1896 {
1897   JVMWrapper("JVM_ConstantPoolGetClassAt");
1898   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1899   bounds_check(cp, index, CHECK_NULL);
1900   constantTag tag = cp->tag_at(index);
1901   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1902     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1903   }
1904   Klass* k = cp->klass_at(index, CHECK_NULL);
1905   return (jclass) JNIHandles::make_local(k->java_mirror());
1906 }
1907 JVM_END
1908 
1909 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1910 {
1911   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1912   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1913   bounds_check(cp, index, CHECK_NULL);
1914   constantTag tag = cp->tag_at(index);
1915   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1916     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1917   }
1918   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1919   if (k == NULL) return NULL;
1920   return (jclass) JNIHandles::make_local(k->java_mirror());
1921 }
1922 JVM_END
1923 
1924 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1925   constantTag tag = cp->tag_at(index);
1926   if (!tag.is_method() && !tag.is_interface_method()) {
1927     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1928   }
1929   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1930   Klass* k_o;
1931   if (force_resolution) {
1932     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1933   } else {
1934     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1935     if (k_o == NULL) return NULL;
1936   }
1937   InstanceKlass* k = InstanceKlass::cast(k_o);
1938   Symbol* name = cp->uncached_name_ref_at(index);
1939   Symbol* sig  = cp->uncached_signature_ref_at(index);
1940   methodHandle m (THREAD, k->find_method(name, sig));
1941   if (m.is_null()) {
1942     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1943   }
1944   oop method;
1945   if (!m->is_initializer() || m->is_static()) {
1946     method = Reflection::new_method(m, true, CHECK_NULL);
1947   } else {
1948     method = Reflection::new_constructor(m, CHECK_NULL);
1949   }
1950   return JNIHandles::make_local(method);
1951 }
1952 
1953 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1954 {
1955   JVMWrapper("JVM_ConstantPoolGetMethodAt");
1956   JvmtiVMObjectAllocEventCollector oam;
1957   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1958   bounds_check(cp, index, CHECK_NULL);
1959   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1960   return res;
1961 }
1962 JVM_END
1963 
1964 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1965 {
1966   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1967   JvmtiVMObjectAllocEventCollector oam;
1968   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1969   bounds_check(cp, index, CHECK_NULL);
1970   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1971   return res;
1972 }
1973 JVM_END
1974 
1975 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1976   constantTag tag = cp->tag_at(index);
1977   if (!tag.is_field()) {
1978     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1979   }
1980   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1981   Klass* k_o;
1982   if (force_resolution) {
1983     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1984   } else {
1985     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1986     if (k_o == NULL) return NULL;
1987   }
1988   InstanceKlass* k = InstanceKlass::cast(k_o);
1989   Symbol* name = cp->uncached_name_ref_at(index);
1990   Symbol* sig  = cp->uncached_signature_ref_at(index);
1991   fieldDescriptor fd;
1992   Klass* target_klass = k->find_field(name, sig, &fd);
1993   if (target_klass == NULL) {
1994     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1995   }
1996   oop field = Reflection::new_field(&fd, CHECK_NULL);
1997   return JNIHandles::make_local(field);
1998 }
1999 
2000 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2001 {
2002   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2003   JvmtiVMObjectAllocEventCollector oam;
2004   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2005   bounds_check(cp, index, CHECK_NULL);
2006   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2007   return res;
2008 }
2009 JVM_END
2010 
2011 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2012 {
2013   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2014   JvmtiVMObjectAllocEventCollector oam;
2015   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2016   bounds_check(cp, index, CHECK_NULL);
2017   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2018   return res;
2019 }
2020 JVM_END
2021 
2022 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2023 {
2024   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2025   JvmtiVMObjectAllocEventCollector oam;
2026   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2027   bounds_check(cp, index, CHECK_NULL);
2028   constantTag tag = cp->tag_at(index);
2029   if (!tag.is_field_or_method()) {
2030     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2031   }
2032   int klass_ref = cp->uncached_klass_ref_index_at(index);
2033   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2034   Symbol*  member_name = cp->uncached_name_ref_at(index);
2035   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2036   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2037   objArrayHandle dest(THREAD, dest_o);
2038   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2039   dest->obj_at_put(0, str());
2040   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2041   dest->obj_at_put(1, str());
2042   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2043   dest->obj_at_put(2, str());
2044   return (jobjectArray) JNIHandles::make_local(dest());
2045 }
2046 JVM_END
2047 
2048 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2049 {
2050   JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2051   JvmtiVMObjectAllocEventCollector oam;
2052   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2053   bounds_check(cp, index, CHECK_0);
2054   constantTag tag = cp->tag_at(index);
2055   if (!tag.is_field_or_method()) {
2056     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2057   }
2058   return (jint) cp->uncached_klass_ref_index_at(index);
2059 }
2060 JVM_END
2061 
2062 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2063 {
2064   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2065   JvmtiVMObjectAllocEventCollector oam;
2066   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2067   bounds_check(cp, index, CHECK_0);
2068   constantTag tag = cp->tag_at(index);
2069   if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2070     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2071   }
2072   return (jint) cp->uncached_name_and_type_ref_index_at(index);
2073 }
2074 JVM_END
2075 
2076 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2077 {
2078   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2079   JvmtiVMObjectAllocEventCollector oam;
2080   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2081   bounds_check(cp, index, CHECK_NULL);
2082   constantTag tag = cp->tag_at(index);
2083   if (!tag.is_name_and_type()) {
2084     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2085   }
2086   Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2087   Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2088   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2089   objArrayHandle dest(THREAD, dest_o);
2090   Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2091   dest->obj_at_put(0, str());
2092   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2093   dest->obj_at_put(1, str());
2094   return (jobjectArray) JNIHandles::make_local(dest());
2095 }
2096 JVM_END
2097 
2098 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2099 {
2100   JVMWrapper("JVM_ConstantPoolGetIntAt");
2101   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102   bounds_check(cp, index, CHECK_0);
2103   constantTag tag = cp->tag_at(index);
2104   if (!tag.is_int()) {
2105     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2106   }
2107   return cp->int_at(index);
2108 }
2109 JVM_END
2110 
2111 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2112 {
2113   JVMWrapper("JVM_ConstantPoolGetLongAt");
2114   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2115   bounds_check(cp, index, CHECK_(0L));
2116   constantTag tag = cp->tag_at(index);
2117   if (!tag.is_long()) {
2118     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2119   }
2120   return cp->long_at(index);
2121 }
2122 JVM_END
2123 
2124 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2125 {
2126   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2127   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2128   bounds_check(cp, index, CHECK_(0.0f));
2129   constantTag tag = cp->tag_at(index);
2130   if (!tag.is_float()) {
2131     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2132   }
2133   return cp->float_at(index);
2134 }
2135 JVM_END
2136 
2137 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2138 {
2139   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2140   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2141   bounds_check(cp, index, CHECK_(0.0));
2142   constantTag tag = cp->tag_at(index);
2143   if (!tag.is_double()) {
2144     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2145   }
2146   return cp->double_at(index);
2147 }
2148 JVM_END
2149 
2150 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2151 {
2152   JVMWrapper("JVM_ConstantPoolGetStringAt");
2153   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2154   bounds_check(cp, index, CHECK_NULL);
2155   constantTag tag = cp->tag_at(index);
2156   if (!tag.is_string()) {
2157     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2158   }
2159   oop str = cp->string_at(index, CHECK_NULL);
2160   return (jstring) JNIHandles::make_local(str);
2161 }
2162 JVM_END
2163 
2164 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2165 {
2166   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2167   JvmtiVMObjectAllocEventCollector oam;
2168   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2169   bounds_check(cp, index, CHECK_NULL);
2170   constantTag tag = cp->tag_at(index);
2171   if (!tag.is_symbol()) {
2172     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2173   }
2174   Symbol* sym = cp->symbol_at(index);
2175   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2176   return (jstring) JNIHandles::make_local(str());
2177 }
2178 JVM_END
2179 
2180 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2181 {
2182   JVMWrapper("JVM_ConstantPoolGetTagAt");
2183   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2184   bounds_check(cp, index, CHECK_0);
2185   constantTag tag = cp->tag_at(index);
2186   jbyte result = tag.value();
2187   // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2188   // they are changed to the corresponding tags from the JVM spec, so that java code in
2189   // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2190   if (tag.is_klass_or_reference()) {
2191       result = JVM_CONSTANT_Class;
2192   } else if (tag.is_string_index()) {
2193       result = JVM_CONSTANT_String;
2194   } else if (tag.is_method_type_in_error()) {
2195       result = JVM_CONSTANT_MethodType;
2196   } else if (tag.is_method_handle_in_error()) {
2197       result = JVM_CONSTANT_MethodHandle;
2198   } else if (tag.is_dynamic_constant_in_error()) {
2199       result = JVM_CONSTANT_Dynamic;
2200   }
2201   return result;
2202 }
2203 JVM_END
2204 
2205 // Assertion support. //////////////////////////////////////////////////////////
2206 
2207 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2208   JVMWrapper("JVM_DesiredAssertionStatus");
2209   assert(cls != NULL, "bad class");
2210 
2211   oop r = JNIHandles::resolve(cls);
2212   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2213   if (java_lang_Class::is_primitive(r)) return false;
2214 
2215   Klass* k = java_lang_Class::as_Klass(r);
2216   assert(k->is_instance_klass(), "must be an instance klass");
2217   if (!k->is_instance_klass()) return false;
2218 
2219   ResourceMark rm(THREAD);
2220   const char* name = k->name()->as_C_string();
2221   bool system_class = k->class_loader() == NULL;
2222   return JavaAssertions::enabled(name, system_class);
2223 
2224 JVM_END
2225 
2226 
2227 // Return a new AssertionStatusDirectives object with the fields filled in with
2228 // command-line assertion arguments (i.e., -ea, -da).
2229 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2230   JVMWrapper("JVM_AssertionStatusDirectives");
2231   JvmtiVMObjectAllocEventCollector oam;
2232   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2233   return JNIHandles::make_local(env, asd);
2234 JVM_END
2235 
2236 // Verification ////////////////////////////////////////////////////////////////////////////////
2237 
2238 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2239 
2240 // RedefineClasses support: bug 6214132 caused verification to fail.
2241 // All functions from this section should call the jvmtiThreadSate function:
2242 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2243 // The function returns a Klass* of the _scratch_class if the verifier
2244 // was invoked in the middle of the class redefinition.
2245 // Otherwise it returns its argument value which is the _the_class Klass*.
2246 // Please, refer to the description in the jvmtiThreadSate.hpp.
2247 
2248 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2249   JVMWrapper("JVM_GetClassNameUTF");
2250   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2251   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2252   return k->name()->as_utf8();
2253 JVM_END
2254 
2255 
2256 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2257   JVMWrapper("JVM_GetClassCPTypes");
2258   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2259   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2260   // types will have length zero if this is not an InstanceKlass
2261   // (length is determined by call to JVM_GetClassCPEntriesCount)
2262   if (k->is_instance_klass()) {
2263     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2264     for (int index = cp->length() - 1; index >= 0; index--) {
2265       constantTag tag = cp->tag_at(index);
2266       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2267     }
2268   }
2269 JVM_END
2270 
2271 
2272 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2273   JVMWrapper("JVM_GetClassCPEntriesCount");
2274   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2275   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2276   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2277 JVM_END
2278 
2279 
2280 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2281   JVMWrapper("JVM_GetClassFieldsCount");
2282   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2283   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2284   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2285 JVM_END
2286 
2287 
2288 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2289   JVMWrapper("JVM_GetClassMethodsCount");
2290   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2291   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2292   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2293 JVM_END
2294 
2295 
2296 // The following methods, used for the verifier, are never called with
2297 // array klasses, so a direct cast to InstanceKlass is safe.
2298 // Typically, these methods are called in a loop with bounds determined
2299 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2300 // zero for arrays.
2301 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2302   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2303   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2304   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2305   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2306   int length = method->checked_exceptions_length();
2307   if (length > 0) {
2308     CheckedExceptionElement* table= method->checked_exceptions_start();
2309     for (int i = 0; i < length; i++) {
2310       exceptions[i] = table[i].class_cp_index;
2311     }
2312   }
2313 JVM_END
2314 
2315 
2316 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2317   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2318   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2319   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2321   return method->checked_exceptions_length();
2322 JVM_END
2323 
2324 
2325 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2326   JVMWrapper("JVM_GetMethodIxByteCode");
2327   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2328   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2329   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2330   memcpy(code, method->code_base(), method->code_size());
2331 JVM_END
2332 
2333 
2334 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2335   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2336   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2337   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2338   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2339   return method->code_size();
2340 JVM_END
2341 
2342 
2343 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2344   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2345   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2346   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2347   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2348   ExceptionTable extable(method);
2349   entry->start_pc   = extable.start_pc(entry_index);
2350   entry->end_pc     = extable.end_pc(entry_index);
2351   entry->handler_pc = extable.handler_pc(entry_index);
2352   entry->catchType  = extable.catch_type_index(entry_index);
2353 JVM_END
2354 
2355 
2356 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2357   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2358   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2359   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2360   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2361   return method->exception_table_length();
2362 JVM_END
2363 
2364 
2365 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2366   JVMWrapper("JVM_GetMethodIxModifiers");
2367   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2368   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2369   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2370   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2371 JVM_END
2372 
2373 
2374 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2375   JVMWrapper("JVM_GetFieldIxModifiers");
2376   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2379 JVM_END
2380 
2381 
2382 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2383   JVMWrapper("JVM_GetMethodIxLocalsCount");
2384   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2385   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2386   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2387   return method->max_locals();
2388 JVM_END
2389 
2390 
2391 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2392   JVMWrapper("JVM_GetMethodIxArgsSize");
2393   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2394   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2395   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2396   return method->size_of_parameters();
2397 JVM_END
2398 
2399 
2400 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2401   JVMWrapper("JVM_GetMethodIxMaxStack");
2402   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2403   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2404   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2405   return method->verifier_max_stack();
2406 JVM_END
2407 
2408 
2409 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2410   JVMWrapper("JVM_IsConstructorIx");
2411   ResourceMark rm(THREAD);
2412   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2413   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2414   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2415   return method->name() == vmSymbols::object_initializer_name();
2416 JVM_END
2417 
2418 
2419 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2420   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2421   ResourceMark rm(THREAD);
2422   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2423   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2424   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2425   return method->is_overpass();
2426 JVM_END
2427 
2428 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2429   JVMWrapper("JVM_GetMethodIxIxUTF");
2430   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2431   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2432   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2433   return method->name()->as_utf8();
2434 JVM_END
2435 
2436 
2437 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2438   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2439   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2440   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2441   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2442   return method->signature()->as_utf8();
2443 JVM_END
2444 
2445 /**
2446  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2447  * read entries in the constant pool.  Since the old verifier always
2448  * works on a copy of the code, it will not see any rewriting that
2449  * may possibly occur in the middle of verification.  So it is important
2450  * that nothing it calls tries to use the cpCache instead of the raw
2451  * constant pool, so we must use cp->uncached_x methods when appropriate.
2452  */
2453 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2454   JVMWrapper("JVM_GetCPFieldNameUTF");
2455   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2456   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2457   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2458   switch (cp->tag_at(cp_index).value()) {
2459     case JVM_CONSTANT_Fieldref:
2460       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2461     default:
2462       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2463   }
2464   ShouldNotReachHere();
2465   return NULL;
2466 JVM_END
2467 
2468 
2469 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2470   JVMWrapper("JVM_GetCPMethodNameUTF");
2471   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2472   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2473   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2474   switch (cp->tag_at(cp_index).value()) {
2475     case JVM_CONSTANT_InterfaceMethodref:
2476     case JVM_CONSTANT_Methodref:
2477       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2478     default:
2479       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2480   }
2481   ShouldNotReachHere();
2482   return NULL;
2483 JVM_END
2484 
2485 
2486 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2487   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2488   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2489   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2490   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2491   switch (cp->tag_at(cp_index).value()) {
2492     case JVM_CONSTANT_InterfaceMethodref:
2493     case JVM_CONSTANT_Methodref:
2494       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2495     default:
2496       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2497   }
2498   ShouldNotReachHere();
2499   return NULL;
2500 JVM_END
2501 
2502 
2503 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2504   JVMWrapper("JVM_GetCPFieldSignatureUTF");
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_signature_ref_at(cp_index)->as_utf8();
2511     default:
2512       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2513   }
2514   ShouldNotReachHere();
2515   return NULL;
2516 JVM_END
2517 
2518 
2519 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2520   JVMWrapper("JVM_GetCPClassNameUTF");
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   Symbol* classname = cp->klass_name_at(cp_index);
2525   return classname->as_utf8();
2526 JVM_END
2527 
2528 
2529 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2530   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2531   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2532   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2533   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2534   switch (cp->tag_at(cp_index).value()) {
2535     case JVM_CONSTANT_Fieldref: {
2536       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2537       Symbol* classname = cp->klass_name_at(class_index);
2538       return classname->as_utf8();
2539     }
2540     default:
2541       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2542   }
2543   ShouldNotReachHere();
2544   return NULL;
2545 JVM_END
2546 
2547 
2548 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2549   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2550   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2551   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2552   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2553   switch (cp->tag_at(cp_index).value()) {
2554     case JVM_CONSTANT_Methodref:
2555     case JVM_CONSTANT_InterfaceMethodref: {
2556       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2557       Symbol* classname = cp->klass_name_at(class_index);
2558       return classname->as_utf8();
2559     }
2560     default:
2561       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2562   }
2563   ShouldNotReachHere();
2564   return NULL;
2565 JVM_END
2566 
2567 
2568 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2569   JVMWrapper("JVM_GetCPFieldModifiers");
2570   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2571   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2572   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2573   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2574   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2575   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2576   switch (cp->tag_at(cp_index).value()) {
2577     case JVM_CONSTANT_Fieldref: {
2578       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2579       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2580       InstanceKlass* ik = InstanceKlass::cast(k_called);
2581       for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2582         if (fs.name() == name && fs.signature() == signature) {
2583           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2584         }
2585       }
2586       return -1;
2587     }
2588     default:
2589       fatal("JVM_GetCPFieldModifiers: illegal constant");
2590   }
2591   ShouldNotReachHere();
2592   return 0;
2593 JVM_END
2594 
2595 
2596 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2597   JVMWrapper("JVM_GetCPMethodModifiers");
2598   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2599   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2600   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2601   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, 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       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2607       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2608       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2609       int methods_count = methods->length();
2610       for (int i = 0; i < methods_count; i++) {
2611         Method* method = methods->at(i);
2612         if (method->name() == name && method->signature() == signature) {
2613             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2614         }
2615       }
2616       return -1;
2617     }
2618     default:
2619       fatal("JVM_GetCPMethodModifiers: illegal constant");
2620   }
2621   ShouldNotReachHere();
2622   return 0;
2623 JVM_END
2624 
2625 
2626 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2627 
2628 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2629   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2630 JVM_END
2631 
2632 
2633 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2634   JVMWrapper("JVM_IsSameClassPackage");
2635   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2636   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2637   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2638   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2639   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2640 JVM_END
2641 
2642 // Printing support //////////////////////////////////////////////////
2643 extern "C" {
2644 
2645 ATTRIBUTE_PRINTF(3, 0)
2646 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2647   // Reject count values that are negative signed values converted to
2648   // unsigned; see bug 4399518, 4417214
2649   if ((intptr_t)count <= 0) return -1;
2650 
2651   int result = os::vsnprintf(str, count, fmt, args);
2652   if (result > 0 && (size_t)result >= count) {
2653     result = -1;
2654   }
2655 
2656   return result;
2657 }
2658 
2659 ATTRIBUTE_PRINTF(3, 4)
2660 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2661   va_list args;
2662   int len;
2663   va_start(args, fmt);
2664   len = jio_vsnprintf(str, count, fmt, args);
2665   va_end(args);
2666   return len;
2667 }
2668 
2669 ATTRIBUTE_PRINTF(2, 3)
2670 int jio_fprintf(FILE* f, const char *fmt, ...) {
2671   int len;
2672   va_list args;
2673   va_start(args, fmt);
2674   len = jio_vfprintf(f, fmt, args);
2675   va_end(args);
2676   return len;
2677 }
2678 
2679 ATTRIBUTE_PRINTF(2, 0)
2680 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2681   if (Arguments::vfprintf_hook() != NULL) {
2682      return Arguments::vfprintf_hook()(f, fmt, args);
2683   } else {
2684     return vfprintf(f, fmt, args);
2685   }
2686 }
2687 
2688 ATTRIBUTE_PRINTF(1, 2)
2689 JNIEXPORT int jio_printf(const char *fmt, ...) {
2690   int len;
2691   va_list args;
2692   va_start(args, fmt);
2693   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2694   va_end(args);
2695   return len;
2696 }
2697 
2698 // HotSpot specific jio method
2699 void jio_print(const char* s, size_t len) {
2700   // Try to make this function as atomic as possible.
2701   if (Arguments::vfprintf_hook() != NULL) {
2702     jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2703   } else {
2704     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2705     size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2706   }
2707 }
2708 
2709 } // Extern C
2710 
2711 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2712 
2713 // In most of the JVM thread support functions we need to access the
2714 // thread through a ThreadsListHandle to prevent it from exiting and
2715 // being reclaimed while we try to operate on it. The exceptions to this
2716 // rule are when operating on the current thread, or if the monitor of
2717 // the target java.lang.Thread is locked at the Java level - in both
2718 // cases the target cannot exit.
2719 
2720 static void thread_entry(JavaThread* thread, TRAPS) {
2721   HandleMark hm(THREAD);
2722   Handle obj(THREAD, thread->threadObj());
2723   JavaValue result(T_VOID);
2724   JavaCalls::call_virtual(&result,
2725                           obj,
2726                           SystemDictionary::Thread_klass(),
2727                           vmSymbols::run_method_name(),
2728                           vmSymbols::void_method_signature(),
2729                           THREAD);
2730 }
2731 
2732 
2733 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2734   JVMWrapper("JVM_StartThread");
2735   JavaThread *native_thread = NULL;
2736 
2737   // We cannot hold the Threads_lock when we throw an exception,
2738   // due to rank ordering issues. Example:  we might need to grab the
2739   // Heap_lock while we construct the exception.
2740   bool throw_illegal_thread_state = false;
2741 
2742   // We must release the Threads_lock before we can post a jvmti event
2743   // in Thread::start.
2744   {
2745     // Ensure that the C++ Thread and OSThread structures aren't freed before
2746     // we operate.
2747     MutexLocker mu(Threads_lock);
2748 
2749     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2750     // re-starting an already started thread, so we should usually find
2751     // that the JavaThread is null. However for a JNI attached thread
2752     // there is a small window between the Thread object being created
2753     // (with its JavaThread set) and the update to its threadStatus, so we
2754     // have to check for this
2755     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2756       throw_illegal_thread_state = true;
2757     } else {
2758       // We could also check the stillborn flag to see if this thread was already stopped, but
2759       // for historical reasons we let the thread detect that itself when it starts running
2760 
2761       jlong size =
2762              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2763       // Allocate the C++ Thread structure and create the native thread.  The
2764       // stack size retrieved from java is 64-bit signed, but the constructor takes
2765       // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2766       //  - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2767       //  - Avoid passing negative values which would result in really large stacks.
2768       NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2769       size_t sz = size > 0 ? (size_t) size : 0;
2770       native_thread = new JavaThread(&thread_entry, sz);
2771 
2772       // At this point it may be possible that no osthread was created for the
2773       // JavaThread due to lack of memory. Check for this situation and throw
2774       // an exception if necessary. Eventually we may want to change this so
2775       // that we only grab the lock if the thread was created successfully -
2776       // then we can also do this check and throw the exception in the
2777       // JavaThread constructor.
2778       if (native_thread->osthread() != NULL) {
2779         // Note: the current thread is not being used within "prepare".
2780         native_thread->prepare(jthread);
2781       }
2782     }
2783   }
2784 
2785   if (throw_illegal_thread_state) {
2786     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2787   }
2788 
2789   assert(native_thread != NULL, "Starting null thread?");
2790 
2791   if (native_thread->osthread() == NULL) {
2792     // No one should hold a reference to the 'native_thread'.
2793     native_thread->smr_delete();
2794     if (JvmtiExport::should_post_resource_exhausted()) {
2795       JvmtiExport::post_resource_exhausted(
2796         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2797         os::native_thread_creation_failed_msg());
2798     }
2799     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2800               os::native_thread_creation_failed_msg());
2801   }
2802 
2803   Thread::start(native_thread);
2804 
2805 JVM_END
2806 
2807 
2808 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2809 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2810 // but is thought to be reliable and simple. In the case, where the receiver is the
2811 // same thread as the sender, no VM_Operation is needed.
2812 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2813   JVMWrapper("JVM_StopThread");
2814 
2815   // A nested ThreadsListHandle will grab the Threads_lock so create
2816   // tlh before we resolve throwable.
2817   ThreadsListHandle tlh(thread);
2818   oop java_throwable = JNIHandles::resolve(throwable);
2819   if (java_throwable == NULL) {
2820     THROW(vmSymbols::java_lang_NullPointerException());
2821   }
2822   oop java_thread = NULL;
2823   JavaThread* receiver = NULL;
2824   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2825   Events::log_exception(thread,
2826                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2827                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
2828 
2829   if (is_alive) {
2830     // jthread refers to a live JavaThread.
2831     if (thread == receiver) {
2832       // Exception is getting thrown at self so no VM_Operation needed.
2833       THROW_OOP(java_throwable);
2834     } else {
2835       // Use a VM_Operation to throw the exception.
2836       Thread::send_async_exception(java_thread, java_throwable);
2837     }
2838   } else {
2839     // Either:
2840     // - target thread has not been started before being stopped, or
2841     // - target thread already terminated
2842     // We could read the threadStatus to determine which case it is
2843     // but that is overkill as it doesn't matter. We must set the
2844     // stillborn flag for the first case, and if the thread has already
2845     // exited setting this flag has no effect.
2846     java_lang_Thread::set_stillborn(java_thread);
2847   }
2848 JVM_END
2849 
2850 
2851 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2852   JVMWrapper("JVM_IsThreadAlive");
2853 
2854   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2855   return java_lang_Thread::is_alive(thread_oop);
2856 JVM_END
2857 
2858 
2859 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2860   JVMWrapper("JVM_SuspendThread");
2861 
2862   ThreadsListHandle tlh(thread);
2863   JavaThread* receiver = NULL;
2864   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2865   if (is_alive) {
2866     // jthread refers to a live JavaThread.
2867     {
2868       MutexLocker ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2869       if (receiver->is_external_suspend()) {
2870         // Don't allow nested external suspend requests. We can't return
2871         // an error from this interface so just ignore the problem.
2872         return;
2873       }
2874       if (receiver->is_exiting()) { // thread is in the process of exiting
2875         return;
2876       }
2877       receiver->set_external_suspend();
2878     }
2879 
2880     // java_suspend() will catch threads in the process of exiting
2881     // and will ignore them.
2882     receiver->java_suspend();
2883 
2884     // It would be nice to have the following assertion in all the
2885     // time, but it is possible for a racing resume request to have
2886     // resumed this thread right after we suspended it. Temporarily
2887     // enable this assertion if you are chasing a different kind of
2888     // bug.
2889     //
2890     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2891     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2892   }
2893 JVM_END
2894 
2895 
2896 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2897   JVMWrapper("JVM_ResumeThread");
2898 
2899   ThreadsListHandle tlh(thread);
2900   JavaThread* receiver = NULL;
2901   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2902   if (is_alive) {
2903     // jthread refers to a live JavaThread.
2904 
2905     // This is the original comment for this Threads_lock grab:
2906     //   We need to *always* get the threads lock here, since this operation cannot be allowed during
2907     //   a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2908     //   threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2909     //   looks at it.
2910     //
2911     // The above comment dates back to when we had both internal and
2912     // external suspend APIs that shared a common underlying mechanism.
2913     // External suspend is now entirely cooperative and doesn't share
2914     // anything with internal suspend. That said, there are some
2915     // assumptions in the VM that an external resume grabs the
2916     // Threads_lock. We can't drop the Threads_lock grab here until we
2917     // resolve the assumptions that exist elsewhere.
2918     //
2919     MutexLocker ml(Threads_lock);
2920     receiver->java_resume();
2921   }
2922 JVM_END
2923 
2924 
2925 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2926   JVMWrapper("JVM_SetThreadPriority");
2927 
2928   ThreadsListHandle tlh(thread);
2929   oop java_thread = NULL;
2930   JavaThread* receiver = NULL;
2931   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2932   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2933 
2934   if (is_alive) {
2935     // jthread refers to a live JavaThread.
2936     Thread::set_priority(receiver, (ThreadPriority)prio);
2937   }
2938   // Implied else: If the JavaThread hasn't started yet, then the
2939   // priority set in the java.lang.Thread object above will be pushed
2940   // down when it does start.
2941 JVM_END
2942 
2943 
2944 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2945   JVMWrapper("JVM_Yield");
2946   if (os::dont_yield()) return;
2947   HOTSPOT_THREAD_YIELD();
2948   os::naked_yield();
2949 JVM_END
2950 
2951 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
2952   assert(event != NULL, "invariant");
2953   assert(event->should_commit(), "invariant");
2954   event->set_time(millis);
2955   event->commit();
2956 }
2957 
2958 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2959   JVMWrapper("JVM_Sleep");
2960 
2961   if (millis < 0) {
2962     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2963   }
2964 
2965   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2966     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2967   }
2968 
2969   // Save current thread state and restore it at the end of this block.
2970   // And set new thread state to SLEEPING.
2971   JavaThreadSleepState jtss(thread);
2972 
2973   HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2974   EventThreadSleep event;
2975 
2976   if (millis == 0) {
2977     os::naked_yield();
2978   } else {
2979     ThreadState old_state = thread->osthread()->get_state();
2980     thread->osthread()->set_state(SLEEPING);
2981     if (os::sleep(thread, millis, true) == OS_INTRPT) {
2982       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2983       // us while we were sleeping. We do not overwrite those.
2984       if (!HAS_PENDING_EXCEPTION) {
2985         if (event.should_commit()) {
2986           post_thread_sleep_event(&event, millis);
2987         }
2988         HOTSPOT_THREAD_SLEEP_END(1);
2989 
2990         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2991         // to properly restore the thread state.  That's likely wrong.
2992         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2993       }
2994     }
2995     thread->osthread()->set_state(old_state);
2996   }
2997   if (event.should_commit()) {
2998     post_thread_sleep_event(&event, millis);
2999   }
3000   HOTSPOT_THREAD_SLEEP_END(0);
3001 JVM_END
3002 
3003 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3004   JVMWrapper("JVM_CurrentThread");
3005   oop jthread = thread->threadObj();
3006   assert (thread != NULL, "no current thread!");
3007   return JNIHandles::make_local(env, jthread);
3008 JVM_END
3009 
3010 class CountStackFramesTC : public ThreadClosure {
3011   int _count;
3012   bool _suspended;
3013  public:
3014   CountStackFramesTC() : _count(0), _suspended(false) {}
3015   virtual void do_thread(Thread* thread) {
3016     JavaThread* jt = (JavaThread*)thread;
3017     if (!jt->is_external_suspend()) {
3018       // To keep same behavior we fail this operation,
3019       // even if it would work perfectly.
3020       return;
3021     }
3022     _suspended = true;
3023      // Count all java activation, i.e., number of vframes.
3024     for (vframeStream vfst(jt); !vfst.at_end(); vfst.next()) {
3025       // Native frames are not counted.
3026       if (!vfst.method()->is_native()) _count++;
3027     }
3028   }
3029   int count() { return _count; }
3030   int suspended() { return _suspended; }
3031 };
3032 
3033 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3034   JVMWrapper("JVM_CountStackFrames");
3035 
3036   ThreadsListHandle tlh(thread);
3037   JavaThread* receiver = NULL;
3038   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3039   if (is_alive) {
3040     // jthread refers to a live JavaThread.
3041     CountStackFramesTC csf;
3042     Handshake::execute(&csf, receiver);
3043     if (!csf.suspended()) {
3044       THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3045                   "this thread is not suspended");
3046     }
3047     return csf.count();
3048   }
3049   // Implied else: if JavaThread is not alive simply return a count of 0.
3050   return 0;
3051 JVM_END
3052 
3053 
3054 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3055   JVMWrapper("JVM_Interrupt");
3056 
3057   ThreadsListHandle tlh(thread);
3058   JavaThread* receiver = NULL;
3059   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3060   if (is_alive) {
3061     // jthread refers to a live JavaThread.
3062     Thread::interrupt(receiver);
3063   }
3064 JVM_END
3065 
3066 
3067 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3068   JVMWrapper("JVM_IsInterrupted");
3069 
3070   ThreadsListHandle tlh(thread);
3071   JavaThread* receiver = NULL;
3072   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3073   if (is_alive) {
3074     // jthread refers to a live JavaThread.
3075     return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3076   } else {
3077     return JNI_FALSE;
3078   }
3079 JVM_END
3080 
3081 
3082 // Return true iff the current thread has locked the object passed in
3083 
3084 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3085   JVMWrapper("JVM_HoldsLock");
3086   assert(THREAD->is_Java_thread(), "sanity check");
3087   if (obj == NULL) {
3088     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3089   }
3090   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3091   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3092 JVM_END
3093 
3094 
3095 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3096   JVMWrapper("JVM_DumpAllStacks");
3097   VM_PrintThreads op;
3098   VMThread::execute(&op);
3099   if (JvmtiExport::should_post_data_dump()) {
3100     JvmtiExport::post_data_dump();
3101   }
3102 JVM_END
3103 
3104 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3105   JVMWrapper("JVM_SetNativeThreadName");
3106 
3107   // We don't use a ThreadsListHandle here because the current thread
3108   // must be alive.
3109   oop java_thread = JNIHandles::resolve_non_null(jthread);
3110   JavaThread* thr = java_lang_Thread::thread(java_thread);
3111   if (thread == thr && !thr->has_attached_via_jni()) {
3112     // Thread naming is only supported for the current thread and
3113     // we don't set the name of an attached thread to avoid stepping
3114     // on other programs.
3115     ResourceMark rm(thread);
3116     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3117     os::set_native_thread_name(thread_name);
3118   }
3119 JVM_END
3120 
3121 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3122 
3123 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3124   JVMWrapper("JVM_GetClassContext");
3125   ResourceMark rm(THREAD);
3126   JvmtiVMObjectAllocEventCollector oam;
3127   vframeStream vfst(thread);
3128 
3129   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3130     // This must only be called from SecurityManager.getClassContext
3131     Method* m = vfst.method();
3132     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3133           m->name()          == vmSymbols::getClassContext_name() &&
3134           m->signature()     == vmSymbols::void_class_array_signature())) {
3135       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3136     }
3137   }
3138 
3139   // Collect method holders
3140   GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3141   for (; !vfst.at_end(); vfst.security_next()) {
3142     Method* m = vfst.method();
3143     // Native frames are not returned
3144     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3145       Klass* holder = m->method_holder();
3146       assert(holder->is_klass(), "just checking");
3147       klass_array->append(holder);
3148     }
3149   }
3150 
3151   // Create result array of type [Ljava/lang/Class;
3152   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3153   // Fill in mirrors corresponding to method holders
3154   for (int i = 0; i < klass_array->length(); i++) {
3155     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3156   }
3157 
3158   return (jobjectArray) JNIHandles::make_local(env, result);
3159 JVM_END
3160 
3161 
3162 // java.lang.Package ////////////////////////////////////////////////////////////////
3163 
3164 
3165 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3166   JVMWrapper("JVM_GetSystemPackage");
3167   ResourceMark rm(THREAD);
3168   JvmtiVMObjectAllocEventCollector oam;
3169   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3170   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3171   return (jstring) JNIHandles::make_local(result);
3172 JVM_END
3173 
3174 
3175 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3176   JVMWrapper("JVM_GetSystemPackages");
3177   JvmtiVMObjectAllocEventCollector oam;
3178   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3179   return (jobjectArray) JNIHandles::make_local(result);
3180 JVM_END
3181 
3182 
3183 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3184 
3185 
3186 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3187   JVMWrapper("JVM_GetAndClearReferencePendingList");
3188 
3189   MonitorLocker ml(Heap_lock);
3190   oop ref = Universe::reference_pending_list();
3191   if (ref != NULL) {
3192     Universe::set_reference_pending_list(NULL);
3193   }
3194   return JNIHandles::make_local(env, ref);
3195 JVM_END
3196 
3197 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3198   JVMWrapper("JVM_HasReferencePendingList");
3199   MonitorLocker ml(Heap_lock);
3200   return Universe::has_reference_pending_list();
3201 JVM_END
3202 
3203 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3204   JVMWrapper("JVM_WaitForReferencePendingList");
3205   MonitorLocker ml(Heap_lock);
3206   while (!Universe::has_reference_pending_list()) {
3207     ml.wait();
3208   }
3209 JVM_END
3210 
3211 
3212 // ObjectInputStream ///////////////////////////////////////////////////////////////
3213 
3214 // Return the first user-defined class loader up the execution stack, or null
3215 // if only code from the bootstrap or platform class loader is on the stack.
3216 
3217 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3218   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3219     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3220     oop loader = vfst.method()->method_holder()->class_loader();
3221     if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3222       return JNIHandles::make_local(env, loader);
3223     }
3224   }
3225   return NULL;
3226 JVM_END
3227 
3228 
3229 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3230 
3231 
3232 // resolve array handle and check arguments
3233 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3234   if (arr == NULL) {
3235     THROW_0(vmSymbols::java_lang_NullPointerException());
3236   }
3237   oop a = JNIHandles::resolve_non_null(arr);
3238   if (!a->is_array()) {
3239     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3240   } else if (type_array_only && !a->is_typeArray()) {
3241     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3242   }
3243   return arrayOop(a);
3244 }
3245 
3246 
3247 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3248   JVMWrapper("JVM_GetArrayLength");
3249   arrayOop a = check_array(env, arr, false, CHECK_0);
3250   return a->length();
3251 JVM_END
3252 
3253 
3254 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3255   JVMWrapper("JVM_Array_Get");
3256   JvmtiVMObjectAllocEventCollector oam;
3257   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3258   jvalue value;
3259   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3260   oop box = Reflection::box(&value, type, CHECK_NULL);
3261   return JNIHandles::make_local(env, box);
3262 JVM_END
3263 
3264 
3265 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3266   JVMWrapper("JVM_GetPrimitiveArrayElement");
3267   jvalue value;
3268   value.i = 0; // to initialize value before getting used in CHECK
3269   arrayOop a = check_array(env, arr, true, CHECK_(value));
3270   assert(a->is_typeArray(), "just checking");
3271   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3272   BasicType wide_type = (BasicType) wCode;
3273   if (type != wide_type) {
3274     Reflection::widen(&value, type, wide_type, CHECK_(value));
3275   }
3276   return value;
3277 JVM_END
3278 
3279 
3280 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3281   JVMWrapper("JVM_SetArrayElement");
3282   arrayOop a = check_array(env, arr, false, CHECK);
3283   oop box = JNIHandles::resolve(val);
3284   jvalue value;
3285   value.i = 0; // to initialize value before getting used in CHECK
3286   BasicType value_type;
3287   if (a->is_objArray()) {
3288     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3289     value_type = Reflection::unbox_for_regular_object(box, &value);
3290   } else {
3291     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3292   }
3293   Reflection::array_set(&value, a, index, value_type, CHECK);
3294 JVM_END
3295 
3296 
3297 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3298   JVMWrapper("JVM_SetPrimitiveArrayElement");
3299   arrayOop a = check_array(env, arr, true, CHECK);
3300   assert(a->is_typeArray(), "just checking");
3301   BasicType value_type = (BasicType) vCode;
3302   Reflection::array_set(&v, a, index, value_type, CHECK);
3303 JVM_END
3304 
3305 
3306 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3307   JVMWrapper("JVM_NewArray");
3308   JvmtiVMObjectAllocEventCollector oam;
3309   oop element_mirror = JNIHandles::resolve(eltClass);
3310   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3311   return JNIHandles::make_local(env, result);
3312 JVM_END
3313 
3314 
3315 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3316   JVMWrapper("JVM_NewMultiArray");
3317   JvmtiVMObjectAllocEventCollector oam;
3318   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3319   oop element_mirror = JNIHandles::resolve(eltClass);
3320   assert(dim_array->is_typeArray(), "just checking");
3321   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3322   return JNIHandles::make_local(env, result);
3323 JVM_END
3324 
3325 
3326 // Library support ///////////////////////////////////////////////////////////////////////////
3327 
3328 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3329   //%note jvm_ct
3330   JVMWrapper("JVM_LoadLibrary");
3331   char ebuf[1024];
3332   void *load_result;
3333   {
3334     ThreadToNativeFromVM ttnfvm(thread);
3335     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3336   }
3337   if (load_result == NULL) {
3338     char msg[1024];
3339     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3340     // Since 'ebuf' may contain a string encoded using
3341     // platform encoding scheme, we need to pass
3342     // Exceptions::unsafe_to_utf8 to the new_exception method
3343     // as the last argument. See bug 6367357.
3344     Handle h_exception =
3345       Exceptions::new_exception(thread,
3346                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3347                                 msg, Exceptions::unsafe_to_utf8);
3348 
3349     THROW_HANDLE_0(h_exception);
3350   }
3351   return load_result;
3352 JVM_END
3353 
3354 
3355 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3356   JVMWrapper("JVM_UnloadLibrary");
3357   os::dll_unload(handle);
3358 JVM_END
3359 
3360 
3361 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3362   JVMWrapper("JVM_FindLibraryEntry");
3363   return os::dll_lookup(handle, name);
3364 JVM_END
3365 
3366 
3367 // JNI version ///////////////////////////////////////////////////////////////////////////////
3368 
3369 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3370   JVMWrapper("JVM_IsSupportedJNIVersion");
3371   return Threads::is_supported_jni_version_including_1_1(version);
3372 JVM_END
3373 
3374 
3375 // String support ///////////////////////////////////////////////////////////////////////////
3376 
3377 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3378   JVMWrapper("JVM_InternString");
3379   JvmtiVMObjectAllocEventCollector oam;
3380   if (str == NULL) return NULL;
3381   oop string = JNIHandles::resolve_non_null(str);
3382   oop result = StringTable::intern(string, CHECK_NULL);
3383   return (jstring) JNIHandles::make_local(env, result);
3384 JVM_END
3385 
3386 
3387 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3388 
3389 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3390 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3391 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3392 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3393 // nature. JavaThreads will be "in native" when using this API from JDK code.
3394 
3395 
3396 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3397   VM_Exit::block_if_vm_exited();
3398   JVMWrapper("JVM_RawMonitorCreate");
3399   return new os::PlatformMutex();
3400 }
3401 
3402 
3403 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3404   VM_Exit::block_if_vm_exited();
3405   JVMWrapper("JVM_RawMonitorDestroy");
3406   delete ((os::PlatformMutex*) mon);
3407 }
3408 
3409 
3410 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3411   VM_Exit::block_if_vm_exited();
3412   JVMWrapper("JVM_RawMonitorEnter");
3413   ((os::PlatformMutex*) mon)->lock();
3414   return 0;
3415 }
3416 
3417 
3418 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3419   VM_Exit::block_if_vm_exited();
3420   JVMWrapper("JVM_RawMonitorExit");
3421   ((os::PlatformMutex*) mon)->unlock();
3422 }
3423 
3424 
3425 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3426 
3427 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3428                                     Handle loader, Handle protection_domain,
3429                                     jboolean throwError, TRAPS) {
3430   // Security Note:
3431   //   The Java level wrapper will perform the necessary security check allowing
3432   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
3433   //   the checkPackageAccess relative to the initiating class loader via the
3434   //   protection_domain. The protection_domain is passed as NULL by the java code
3435   //   if there is no security manager in 3-arg Class.forName().
3436   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3437 
3438   // Check if we should initialize the class
3439   if (init && klass->is_instance_klass()) {
3440     klass->initialize(CHECK_NULL);
3441   }
3442   return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3443 }
3444 
3445 
3446 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3447 
3448 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3449   JVMWrapper("JVM_InvokeMethod");
3450   Handle method_handle;
3451   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3452     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3453     Handle receiver(THREAD, JNIHandles::resolve(obj));
3454     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3455     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3456     jobject res = JNIHandles::make_local(env, result);
3457     if (JvmtiExport::should_post_vm_object_alloc()) {
3458       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3459       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3460       if (java_lang_Class::is_primitive(ret_type)) {
3461         // Only for primitive type vm allocates memory for java object.
3462         // See box() method.
3463         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3464       }
3465     }
3466     return res;
3467   } else {
3468     THROW_0(vmSymbols::java_lang_StackOverflowError());
3469   }
3470 JVM_END
3471 
3472 
3473 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3474   JVMWrapper("JVM_NewInstanceFromConstructor");
3475   oop constructor_mirror = JNIHandles::resolve(c);
3476   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3477   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3478   jobject res = JNIHandles::make_local(env, result);
3479   if (JvmtiExport::should_post_vm_object_alloc()) {
3480     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3481   }
3482   return res;
3483 JVM_END
3484 
3485 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3486 
3487 JVM_LEAF(jboolean, JVM_SupportsCX8())
3488   JVMWrapper("JVM_SupportsCX8");
3489   return VM_Version::supports_cx8();
3490 JVM_END
3491 
3492 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3493   JVMWrapper("JVM_InitializeFromArchive");
3494   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3495   assert(k->is_klass(), "just checking");
3496   HeapShared::initialize_from_archived_subgraph(k);
3497 JVM_END
3498 
3499 // Returns an array of all live Thread objects (VM internal JavaThreads,
3500 // jvmti agent threads, and JNI attaching threads  are skipped)
3501 // See CR 6404306 regarding JNI attaching threads
3502 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3503   ResourceMark rm(THREAD);
3504   ThreadsListEnumerator tle(THREAD, false, false);
3505   JvmtiVMObjectAllocEventCollector oam;
3506 
3507   int num_threads = tle.num_threads();
3508   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3509   objArrayHandle threads_ah(THREAD, r);
3510 
3511   for (int i = 0; i < num_threads; i++) {
3512     Handle h = tle.get_threadObj(i);
3513     threads_ah->obj_at_put(i, h());
3514   }
3515 
3516   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3517 JVM_END
3518 
3519 
3520 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3521 // Return StackTraceElement[][], each element is the stack trace of a thread in
3522 // the corresponding entry in the given threads array
3523 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3524   JVMWrapper("JVM_DumpThreads");
3525   JvmtiVMObjectAllocEventCollector oam;
3526 
3527   // Check if threads is null
3528   if (threads == NULL) {
3529     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3530   }
3531 
3532   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3533   objArrayHandle ah(THREAD, a);
3534   int num_threads = ah->length();
3535   // check if threads is non-empty array
3536   if (num_threads == 0) {
3537     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3538   }
3539 
3540   // check if threads is not an array of objects of Thread class
3541   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3542   if (k != SystemDictionary::Thread_klass()) {
3543     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3544   }
3545 
3546   ResourceMark rm(THREAD);
3547 
3548   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3549   for (int i = 0; i < num_threads; i++) {
3550     oop thread_obj = ah->obj_at(i);
3551     instanceHandle h(THREAD, (instanceOop) thread_obj);
3552     thread_handle_array->append(h);
3553   }
3554 
3555   // The JavaThread references in thread_handle_array are validated
3556   // in VM_ThreadDump::doit().
3557   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3558   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3559 
3560 JVM_END
3561 
3562 // JVM monitoring and management support
3563 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3564   return Management::get_jmm_interface(version);
3565 JVM_END
3566 
3567 // com.sun.tools.attach.VirtualMachine agent properties support
3568 //
3569 // Initialize the agent properties with the properties maintained in the VM
3570 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3571   JVMWrapper("JVM_InitAgentProperties");
3572   ResourceMark rm;
3573 
3574   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3575 
3576   PUTPROP(props, "sun.java.command", Arguments::java_command());
3577   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3578   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3579   return properties;
3580 JVM_END
3581 
3582 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3583 {
3584   JVMWrapper("JVM_GetEnclosingMethodInfo");
3585   JvmtiVMObjectAllocEventCollector oam;
3586 
3587   if (ofClass == NULL) {
3588     return NULL;
3589   }
3590   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3591   // Special handling for primitive objects
3592   if (java_lang_Class::is_primitive(mirror())) {
3593     return NULL;
3594   }
3595   Klass* k = java_lang_Class::as_Klass(mirror());
3596   if (!k->is_instance_klass()) {
3597     return NULL;
3598   }
3599   InstanceKlass* ik = InstanceKlass::cast(k);
3600   int encl_method_class_idx = ik->enclosing_method_class_index();
3601   if (encl_method_class_idx == 0) {
3602     return NULL;
3603   }
3604   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3605   objArrayHandle dest(THREAD, dest_o);
3606   Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3607   dest->obj_at_put(0, enc_k->java_mirror());
3608   int encl_method_method_idx = ik->enclosing_method_method_index();
3609   if (encl_method_method_idx != 0) {
3610     Symbol* sym = ik->constants()->symbol_at(
3611                         extract_low_short_from_int(
3612                           ik->constants()->name_and_type_at(encl_method_method_idx)));
3613     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3614     dest->obj_at_put(1, str());
3615     sym = ik->constants()->symbol_at(
3616               extract_high_short_from_int(
3617                 ik->constants()->name_and_type_at(encl_method_method_idx)));
3618     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3619     dest->obj_at_put(2, str());
3620   }
3621   return (jobjectArray) JNIHandles::make_local(dest());
3622 }
3623 JVM_END
3624 
3625 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3626 {
3627   memset(info, 0, info_size);
3628 
3629   info->jvm_version = VM_Version::jvm_version();
3630   info->patch_version = VM_Version::vm_patch_version();
3631 
3632   // when we add a new capability in the jvm_version_info struct, we should also
3633   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3634   // counter defined in runtimeService.cpp.
3635   info->is_attach_supported = AttachListener::is_attach_supported();
3636 }
3637 JVM_END
3638 
3639 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3640 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3641   ResourceMark rm(THREAD);
3642 
3643   if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3644     return NULL;
3645   }
3646 
3647   char** vm_flags = Arguments::jvm_flags_array();
3648   char** vm_args = Arguments::jvm_args_array();
3649   int num_flags = Arguments::num_jvm_flags();
3650   int num_args = Arguments::num_jvm_args();
3651 
3652   InstanceKlass* ik = SystemDictionary::String_klass();
3653   objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3654   objArrayHandle result_h(THREAD, r);
3655 
3656   int index = 0;
3657   for (int j = 0; j < num_flags; j++, index++) {
3658     Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3659     result_h->obj_at_put(index, h());
3660   }
3661   for (int i = 0; i < num_args; i++, index++) {
3662     Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3663     result_h->obj_at_put(index, h());
3664   }
3665   return (jobjectArray) JNIHandles::make_local(env, result_h());
3666 JVM_END
3667 
3668 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3669   return os::get_signal_number(name);
3670 JVM_END
--- EOF ---