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 "interpreter/bytecodeUtils.hpp"
  42 #include "jfr/jfrEvents.hpp"
  43 #include "logging/log.hpp"
  44 #include "memory/heapShared.hpp"
  45 #include "memory/oopFactory.hpp"
  46 #include "memory/referenceType.hpp"
  47 #include "memory/resourceArea.hpp"
  48 #include "memory/universe.hpp"
  49 #include "oops/access.inline.hpp"
  50 #include "oops/constantPool.hpp"
  51 #include "oops/fieldStreams.hpp"
  52 #include "oops/instanceKlass.hpp"
  53 #include "oops/method.hpp"
  54 #include "oops/objArrayKlass.hpp"
  55 #include "oops/objArrayOop.inline.hpp"
  56 #include "oops/oop.inline.hpp"
  57 #include "prims/jvm_misc.hpp"
  58 #include "prims/jvmtiExport.hpp"
  59 #include "prims/jvmtiThreadState.hpp"
  60 #include "prims/nativeLookup.hpp"
  61 #include "prims/stackwalk.hpp"
  62 #include "runtime/arguments.hpp"
  63 #include "runtime/atomic.hpp"
  64 #include "runtime/handles.inline.hpp"
  65 #include "runtime/init.hpp"
  66 #include "runtime/interfaceSupport.inline.hpp"
  67 #include "runtime/deoptimization.hpp"
  68 #include "runtime/handshake.hpp"
  69 #include "runtime/java.hpp"
  70 #include "runtime/javaCalls.hpp"
  71 #include "runtime/jfieldIDWorkaround.hpp"
  72 #include "runtime/jniHandles.inline.hpp"
  73 #include "runtime/orderAccess.hpp"
  74 #include "runtime/os.inline.hpp"
  75 #include "runtime/perfData.hpp"
  76 #include "runtime/reflection.hpp"
  77 #include "runtime/thread.inline.hpp"
  78 #include "runtime/threadSMR.hpp"
  79 #include "runtime/vframe.inline.hpp"
  80 #include "runtime/vmOperations.hpp"
  81 #include "runtime/vm_version.hpp"
  82 #include "services/attachListener.hpp"
  83 #include "services/management.hpp"
  84 #include "services/threadService.hpp"
  85 #include "utilities/copy.hpp"
  86 #include "utilities/defaultStream.hpp"
  87 #include "utilities/dtrace.hpp"
  88 #include "utilities/events.hpp"
  89 #include "utilities/histogram.hpp"
  90 #include "utilities/macros.hpp"
  91 #include "utilities/utf8.hpp"
  92 #if INCLUDE_CDS
  93 #include "classfile/systemDictionaryShared.hpp"
  94 #endif
  95 
  96 #include <errno.h>
  97 
  98 /*
  99   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
 100   such ctors and calls MUST NOT come between an oop declaration/init and its
 101   usage because if objects are move this may cause various memory stomps, bus
 102   errors and segfaults. Here is a cookbook for causing so called "naked oop
 103   failures":
 104 
 105       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
 106           JVMWrapper("JVM_GetClassDeclaredFields");
 107 
 108           // Object address to be held directly in mirror & not visible to GC
 109           oop mirror = JNIHandles::resolve_non_null(ofClass);
 110 
 111           // If this ctor can hit a safepoint, moving objects around, then
 112           ComplexConstructor foo;
 113 
 114           // Boom! mirror may point to JUNK instead of the intended object
 115           (some dereference of mirror)
 116 
 117           // Here's another call that may block for GC, making mirror stale
 118           MutexLocker ml(some_lock);
 119 
 120           // And here's an initializer that can result in a stale oop
 121           // all in one step.
 122           oop o = call_that_can_throw_exception(TRAPS);
 123 
 124 
 125   The solution is to keep the oop declaration BELOW the ctor or function
 126   call that might cause a GC, do another resolve to reassign the oop, or
 127   consider use of a Handle instead of an oop so there is immunity from object
 128   motion. But note that the "QUICK" entries below do not have a handlemark
 129   and thus can only support use of handles passed in.
 130 */
 131 
 132 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
 133   ResourceMark rm;
 134   int line_number = -1;
 135   const char * source_file = NULL;
 136   const char * trace = "explicit";
 137   InstanceKlass* caller = NULL;
 138   JavaThread* jthread = JavaThread::current();
 139   if (jthread->has_last_Java_frame()) {
 140     vframeStream vfst(jthread);
 141 
 142     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
 143     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
 144     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
 145     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
 146     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
 147 
 148     Method* last_caller = NULL;
 149 
 150     while (!vfst.at_end()) {
 151       Method* m = vfst.method();
 152       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
 153           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
 154           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
 155         break;
 156       }
 157       last_caller = m;
 158       vfst.next();
 159     }
 160     // if this is called from Class.forName0 and that is called from Class.forName,
 161     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 162     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 163     bool found_it = false;
 164     if (!vfst.at_end() &&
 165         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 166         vfst.method()->name() == vmSymbols::forName0_name()) {
 167       vfst.next();
 168       if (!vfst.at_end() &&
 169           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 170           vfst.method()->name() == vmSymbols::forName_name()) {
 171         vfst.next();
 172         found_it = true;
 173       }
 174     } else if (last_caller != NULL &&
 175                last_caller->method_holder()->name() ==
 176                  vmSymbols::java_lang_ClassLoader() &&
 177                last_caller->name() == vmSymbols::loadClass_name()) {
 178       found_it = true;
 179     } else if (!vfst.at_end()) {
 180       if (vfst.method()->is_native()) {
 181         // JNI call
 182         found_it = true;
 183       }
 184     }
 185     if (found_it && !vfst.at_end()) {
 186       // found the caller
 187       caller = vfst.method()->method_holder();
 188       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 189       if (line_number == -1) {
 190         // show method name if it's a native method
 191         trace = vfst.method()->name_and_sig_as_C_string();
 192       }
 193       Symbol* s = caller->source_file_name();
 194       if (s != NULL) {
 195         source_file = s->as_C_string();
 196       }
 197     }
 198   }
 199   if (caller != NULL) {
 200     if (to_class != caller) {
 201       const char * from = caller->external_name();
 202       const char * to = to_class->external_name();
 203       // print in a single call to reduce interleaving between threads
 204       if (source_file != NULL) {
 205         log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
 206       } else {
 207         log_debug(class, resolve)("%s %s (%s)", from, to, trace);
 208       }
 209     }
 210   }
 211 }
 212 
 213 void trace_class_resolution(Klass* to_class) {
 214   EXCEPTION_MARK;
 215   trace_class_resolution_impl(to_class, THREAD);
 216   if (HAS_PENDING_EXCEPTION) {
 217     CLEAR_PENDING_EXCEPTION;
 218   }
 219 }
 220 
 221 // Wrapper to trace JVM functions
 222 
 223 #ifdef ASSERT
 224   Histogram* JVMHistogram;
 225   volatile int JVMHistogram_lock = 0;
 226 
 227   class JVMHistogramElement : public HistogramElement {
 228     public:
 229      JVMHistogramElement(const char* name);
 230   };
 231 
 232   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
 233     _name = elementName;
 234     uintx count = 0;
 235 
 236     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
 237       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
 238         count +=1;
 239         if ( (WarnOnStalledSpinLock > 0)
 240           && (count % WarnOnStalledSpinLock == 0)) {
 241           warning("JVMHistogram_lock seems to be stalled");
 242         }
 243       }
 244      }
 245 
 246     if(JVMHistogram == NULL)
 247       JVMHistogram = new Histogram("JVM Call Counts",100);
 248 
 249     JVMHistogram->add_element(this);
 250     Atomic::dec(&JVMHistogram_lock);
 251   }
 252 
 253   #define JVMCountWrapper(arg) \
 254       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
 255       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
 256 
 257   #define JVMWrapper(arg) JVMCountWrapper(arg);
 258 #else
 259   #define JVMWrapper(arg)
 260 #endif
 261 
 262 
 263 // Interface version /////////////////////////////////////////////////////////////////////
 264 
 265 
 266 JVM_LEAF(jint, JVM_GetInterfaceVersion())
 267   return JVM_INTERFACE_VERSION;
 268 JVM_END
 269 
 270 
 271 // java.lang.System //////////////////////////////////////////////////////////////////////
 272 
 273 
 274 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 275   JVMWrapper("JVM_CurrentTimeMillis");
 276   return os::javaTimeMillis();
 277 JVM_END
 278 
 279 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
 280   JVMWrapper("JVM_NanoTime");
 281   return os::javaTimeNanos();
 282 JVM_END
 283 
 284 // The function below is actually exposed by jdk.internal.misc.VM and not
 285 // java.lang.System, but we choose to keep it here so that it stays next
 286 // to JVM_CurrentTimeMillis and JVM_NanoTime
 287 
 288 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); //  2^32
 289 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
 290 
 291 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
 292   JVMWrapper("JVM_GetNanoTimeAdjustment");
 293   jlong seconds;
 294   jlong nanos;
 295 
 296   os::javaTimeSystemUTC(seconds, nanos);
 297 
 298   // We're going to verify that the result can fit in a long.
 299   // For that we need the difference in seconds between 'seconds'
 300   // and 'offset_secs' to be such that:
 301   //     |seconds - offset_secs| < (2^63/10^9)
 302   // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
 303   // which makes |seconds - offset_secs| < 2^33
 304   // and we will prefer +/- 2^32 as the maximum acceptable diff
 305   // as 2^32 has a more natural feel than 2^33...
 306   //
 307   // So if |seconds - offset_secs| >= 2^32 - we return a special
 308   // sentinel value (-1) which the caller should take as an
 309   // exception value indicating that the offset given to us is
 310   // too far from range of the current time - leading to too big
 311   // a nano adjustment. The caller is expected to recover by
 312   // computing a more accurate offset and calling this method
 313   // again. (For the record 2^32 secs is ~136 years, so that
 314   // should rarely happen)
 315   //
 316   jlong diff = seconds - offset_secs;
 317   if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
 318      return -1; // sentinel value: the offset is too far off the target
 319   }
 320 
 321   // return the adjustment. If you compute a time by adding
 322   // this number of nanoseconds along with the number of seconds
 323   // in the offset you should get the current UTC time.
 324   return (diff * (jlong)1000000000) + nanos;
 325 JVM_END
 326 
 327 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 328                                jobject dst, jint dst_pos, jint length))
 329   JVMWrapper("JVM_ArrayCopy");
 330   // Check if we have null pointers
 331   if (src == NULL || dst == NULL) {
 332     THROW(vmSymbols::java_lang_NullPointerException());
 333   }
 334   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 335   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 336   assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
 337   assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
 338   // Do copy
 339   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 340 JVM_END
 341 
 342 
 343 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 344   JavaValue r(T_OBJECT);
 345   // public synchronized Object put(Object key, Object value);
 346   HandleMark hm(THREAD);
 347   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 348   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
 349   JavaCalls::call_virtual(&r,
 350                           props,
 351                           SystemDictionary::Properties_klass(),
 352                           vmSymbols::put_name(),
 353                           vmSymbols::object_object_object_signature(),
 354                           key_str,
 355                           value_str,
 356                           THREAD);
 357 }
 358 
 359 
 360 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 361 
 362 /*
 363  * Return all of the system properties in a Java String array with alternating
 364  * names and values from the jvm SystemProperty.
 365  * Which includes some internal and all commandline -D defined properties.
 366  */
 367 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
 368   JVMWrapper("JVM_GetProperties");
 369   ResourceMark rm(THREAD);
 370   HandleMark hm(THREAD);
 371   int ndx = 0;
 372   int fixedCount = 2;
 373 
 374   SystemProperty* p = Arguments::system_properties();
 375   int count = Arguments::PropertyList_count(p);
 376 
 377   // Allocate result String array
 378   InstanceKlass* ik = SystemDictionary::String_klass();
 379   objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
 380   objArrayHandle result_h(THREAD, r);
 381 
 382   while (p != NULL) {
 383     const char * key = p->key();
 384     if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
 385         const char * value = p->value();
 386         Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
 387         Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
 388         result_h->obj_at_put(ndx * 2,  key_str());
 389         result_h->obj_at_put(ndx * 2 + 1, value_str());
 390         ndx++;
 391     }
 392     p = p->next();
 393   }
 394 
 395   // Convert the -XX:MaxDirectMemorySize= command line flag
 396   // to the sun.nio.MaxDirectMemorySize property.
 397   // Do this after setting user properties to prevent people
 398   // from setting the value with a -D option, as requested.
 399   // Leave empty if not supplied
 400   if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 401     char as_chars[256];
 402     jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
 403     Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
 404     Handle value_str  = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
 405     result_h->obj_at_put(ndx * 2,  key_str());
 406     result_h->obj_at_put(ndx * 2 + 1, value_str());
 407     ndx++;
 408   }
 409 
 410   // JVM monitoring and management support
 411   // Add the sun.management.compiler property for the compiler's name
 412   {
 413 #undef CSIZE
 414 #if defined(_LP64) || defined(_WIN64)
 415   #define CSIZE "64-Bit "
 416 #else
 417   #define CSIZE
 418 #endif // 64bit
 419 
 420 #ifdef TIERED
 421     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 422 #else
 423 #if defined(COMPILER1)
 424     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 425 #elif defined(COMPILER2)
 426     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 427 #elif INCLUDE_JVMCI
 428     #error "INCLUDE_JVMCI should imply TIERED"
 429 #else
 430     const char* compiler_name = "";
 431 #endif // compilers
 432 #endif // TIERED
 433 
 434     if (*compiler_name != '\0' &&
 435         (Arguments::mode() != Arguments::_int)) {
 436       Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
 437       Handle value_str  = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
 438       result_h->obj_at_put(ndx * 2,  key_str());
 439       result_h->obj_at_put(ndx * 2 + 1, value_str());
 440       ndx++;
 441     }
 442   }
 443 
 444   return (jobjectArray) JNIHandles::make_local(env, result_h());
 445 JVM_END
 446 
 447 
 448 /*
 449  * Return the temporary directory that the VM uses for the attach
 450  * and perf data files.
 451  *
 452  * It is important that this directory is well-known and the
 453  * same for all VM instances. It cannot be affected by configuration
 454  * variables such as java.io.tmpdir.
 455  */
 456 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
 457   JVMWrapper("JVM_GetTemporaryDirectory");
 458   HandleMark hm(THREAD);
 459   const char* temp_dir = os::get_temp_directory();
 460   Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
 461   return (jstring) JNIHandles::make_local(env, h());
 462 JVM_END
 463 
 464 
 465 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 466 
 467 extern volatile jint vm_created;
 468 
 469 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
 470   JVMWrapper("JVM_BeforeHalt");
 471   EventShutdown event;
 472   if (event.should_commit()) {
 473     event.set_reason("Shutdown requested from Java");
 474     event.commit();
 475   }
 476 JVM_END
 477 
 478 
 479 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
 480   before_exit(thread);
 481   vm_exit(code);
 482 JVM_END
 483 
 484 
 485 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
 486   JVMWrapper("JVM_GC");
 487   if (!DisableExplicitGC) {
 488     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 489   }
 490 JVM_END
 491 
 492 
 493 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
 494   JVMWrapper("JVM_MaxObjectInspectionAge");
 495   return Universe::heap()->millis_since_last_gc();
 496 JVM_END
 497 
 498 
 499 static inline jlong convert_size_t_to_jlong(size_t val) {
 500   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 501   NOT_LP64 (return (jlong)val;)
 502   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 503 }
 504 
 505 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
 506   JVMWrapper("JVM_TotalMemory");
 507   size_t n = Universe::heap()->capacity();
 508   return convert_size_t_to_jlong(n);
 509 JVM_END
 510 
 511 
 512 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
 513   JVMWrapper("JVM_FreeMemory");
 514   size_t n = Universe::heap()->unused();
 515   return convert_size_t_to_jlong(n);
 516 JVM_END
 517 
 518 
 519 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
 520   JVMWrapper("JVM_MaxMemory");
 521   size_t n = Universe::heap()->max_capacity();
 522   return convert_size_t_to_jlong(n);
 523 JVM_END
 524 
 525 
 526 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
 527   JVMWrapper("JVM_ActiveProcessorCount");
 528   return os::active_processor_count();
 529 JVM_END
 530 
 531 
 532 
 533 // java.lang.Throwable //////////////////////////////////////////////////////
 534 
 535 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 // java.lang.NullPointerException ///////////////////////////////////////////
 542 
 543 // Replaces the following well-known class names:
 544 //   java.lang.Object -> Object
 545 //   java.lang.String -> String
 546 static void trim_well_known_class_names(char *message) {
 547   size_t len = strlen(message);
 548   size_t skip_len = strlen("java.lang.");
 549   size_t min_pattern_len = strlen("java.lang.String");
 550   if (len < min_pattern_len) return;
 551 
 552   for (size_t isrc = 0, idst = 0; isrc <= len; isrc++, idst++) {
 553     if (strncmp(message + isrc, "java.lang.Object", min_pattern_len) == 0 ||
 554         strncmp(message + isrc, "java.lang.String", min_pattern_len) == 0   ) {
 555       isrc += skip_len;
 556     }
 557     if (idst != isrc) {
 558       message[idst] = message[isrc];
 559     }
 560   }
 561 }
 562 
 563 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
 564   if (!ShowCodeDetailsInExceptionMessages) return NULL;
 565 
 566   oop exc = JNIHandles::resolve_non_null(throwable);
 567 
 568   Method* method;
 569   int bci;
 570   if (!java_lang_Throwable::get_method_and_bci(exc, &method, &bci)) {
 571     return NULL;
 572   }
 573   if (method->is_native()) {
 574     return NULL;
 575   }
 576 
 577   ResourceMark rm(THREAD);
 578   stringStream ss;
 579   bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
 580   if (ok) {
 581     char *result_string = ss.as_string();
 582     trim_well_known_class_names(result_string);
 583     oop result = java_lang_String::create_oop_from_str(result_string, CHECK_0);
 584     return (jstring) JNIHandles::make_local(env, result);
 585   } else {
 586     return NULL;
 587   }
 588 JVM_END
 589 
 590 // java.lang.StackTraceElement //////////////////////////////////////////////
 591 
 592 
 593 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
 594   JVMWrapper("JVM_InitStackTraceElementArray");
 595   Handle exception(THREAD, JNIHandles::resolve(throwable));
 596   objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
 597   objArrayHandle stack_trace(THREAD, st);
 598   // Fill in the allocated stack trace
 599   java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
 600 JVM_END
 601 
 602 
 603 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
 604   JVMWrapper("JVM_InitStackTraceElement");
 605   Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
 606   Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
 607   java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
 608 JVM_END
 609 
 610 
 611 // java.lang.StackWalker //////////////////////////////////////////////////////
 612 
 613 
 614 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
 615                                      jint skip_frames, jint frame_count, jint start_index,
 616                                      jobjectArray frames))
 617   JVMWrapper("JVM_CallStackWalk");
 618   JavaThread* jt = (JavaThread*) THREAD;
 619   if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
 620     THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
 621   }
 622 
 623   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 624 
 625   // frames array is a Class<?>[] array when only getting caller reference,
 626   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 627   // be null.
 628   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 629   objArrayHandle frames_array_h(THREAD, fa);
 630 
 631   int limit = start_index + frame_count;
 632   if (frames_array_h->length() < limit) {
 633     THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
 634   }
 635 
 636   oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
 637                                start_index, frames_array_h, CHECK_NULL);
 638   return JNIHandles::make_local(env, result);
 639 JVM_END
 640 
 641 
 642 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
 643                                   jint frame_count, jint start_index,
 644                                   jobjectArray frames))
 645   JVMWrapper("JVM_MoreStackWalk");
 646   JavaThread* jt = (JavaThread*) THREAD;
 647 
 648   // frames array is a Class<?>[] array when only getting caller reference,
 649   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 650   // be null.
 651   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 652   objArrayHandle frames_array_h(THREAD, fa);
 653 
 654   int limit = start_index+frame_count;
 655   if (frames_array_h->length() < limit) {
 656     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
 657   }
 658 
 659   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 660   return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
 661                                    start_index, frames_array_h, THREAD);
 662 JVM_END
 663 
 664 // java.lang.Object ///////////////////////////////////////////////
 665 
 666 
 667 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 668   JVMWrapper("JVM_IHashCode");
 669   // as implemented in the classic virtual machine; return 0 if object is NULL
 670   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 671 JVM_END
 672 
 673 
 674 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 675   JVMWrapper("JVM_MonitorWait");
 676   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 677   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 678   if (JvmtiExport::should_post_monitor_wait()) {
 679     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 680 
 681     // The current thread already owns the monitor and it has not yet
 682     // been added to the wait queue so the current thread cannot be
 683     // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
 684     // event handler cannot accidentally consume an unpark() meant for
 685     // the ParkEvent associated with this ObjectMonitor.
 686   }
 687   ObjectSynchronizer::wait(obj, ms, CHECK);
 688 JVM_END
 689 
 690 
 691 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 692   JVMWrapper("JVM_MonitorNotify");
 693   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 694   ObjectSynchronizer::notify(obj, CHECK);
 695 JVM_END
 696 
 697 
 698 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 699   JVMWrapper("JVM_MonitorNotifyAll");
 700   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 701   ObjectSynchronizer::notifyall(obj, CHECK);
 702 JVM_END
 703 
 704 
 705 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 706   JVMWrapper("JVM_Clone");
 707   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 708   Klass* klass = obj->klass();
 709   JvmtiVMObjectAllocEventCollector oam;
 710 
 711 #ifdef ASSERT
 712   // Just checking that the cloneable flag is set correct
 713   if (obj->is_array()) {
 714     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 715   } else {
 716     guarantee(obj->is_instance(), "should be instanceOop");
 717     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 718     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 719   }
 720 #endif
 721 
 722   // Check if class of obj supports the Cloneable interface.
 723   // All arrays are considered to be cloneable (See JLS 20.1.5).
 724   // All j.l.r.Reference classes are considered non-cloneable.
 725   if (!klass->is_cloneable() ||
 726       (klass->is_instance_klass() &&
 727        InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
 728     ResourceMark rm(THREAD);
 729     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 730   }
 731 
 732   // Make shallow object copy
 733   const int size = obj->size();
 734   oop new_obj_oop = NULL;
 735   if (obj->is_array()) {
 736     const int length = ((arrayOop)obj())->length();
 737     new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
 738                                                    /* do_zero */ true, CHECK_NULL);
 739   } else {
 740     new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
 741   }
 742 
 743   HeapAccess<>::clone(obj(), new_obj_oop, size);
 744 
 745   Handle new_obj(THREAD, new_obj_oop);
 746   // Caution: this involves a java upcall, so the clone should be
 747   // "gc-robust" by this stage.
 748   if (klass->has_finalizer()) {
 749     assert(obj->is_instance(), "should be instanceOop");
 750     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
 751     new_obj = Handle(THREAD, new_obj_oop);
 752   }
 753 
 754   return JNIHandles::make_local(env, new_obj());
 755 JVM_END
 756 
 757 // java.io.File ///////////////////////////////////////////////////////////////
 758 
 759 JVM_LEAF(char*, JVM_NativePath(char* path))
 760   JVMWrapper("JVM_NativePath");
 761   return os::native_path(path);
 762 JVM_END
 763 
 764 
 765 // Misc. class handling ///////////////////////////////////////////////////////////
 766 
 767 
 768 JVM_ENTRY(void, JVM_LinkClass(JNIEnv* env, jclass classClass, jclass arg))
 769   JVMWrapper("JVM_LinkClass");
 770 
 771   oop r = JNIHandles::resolve(arg);
 772   Klass* klass = java_lang_Class::as_Klass(r);
 773 
 774   if (!ClassForNameDeferLinking && klass->is_instance_klass()) {
 775     InstanceKlass::cast(klass)->link_class(CHECK);
 776   }
 777 JVM_END
 778 
 779 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
 780   JVMWrapper("JVM_GetCallerClass");
 781 
 782   // Getting the class of the caller frame.
 783   //
 784   // The call stack at this point looks something like this:
 785   //
 786   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 787   // [1] [ @CallerSensitive API.method                                   ]
 788   // [.] [ (skipped intermediate frames)                                 ]
 789   // [n] [ caller                                                        ]
 790   vframeStream vfst(thread);
 791   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 792   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 793     Method* m = vfst.method();
 794     assert(m != NULL, "sanity");
 795     switch (n) {
 796     case 0:
 797       // This must only be called from Reflection.getCallerClass
 798       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 799         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 800       }
 801       // fall-through
 802     case 1:
 803       // Frame 0 and 1 must be caller sensitive.
 804       if (!m->caller_sensitive()) {
 805         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 806       }
 807       break;
 808     default:
 809       if (!m->is_ignored_by_security_stack_walk()) {
 810         // We have reached the desired frame; return the holder class.
 811         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 812       }
 813       break;
 814     }
 815   }
 816   return NULL;
 817 JVM_END
 818 
 819 
 820 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 821   JVMWrapper("JVM_FindPrimitiveClass");
 822   oop mirror = NULL;
 823   BasicType t = name2type(utf);
 824   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
 825     mirror = Universe::java_mirror(t);
 826   }
 827   if (mirror == NULL) {
 828     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 829   } else {
 830     return (jclass) JNIHandles::make_local(env, mirror);
 831   }
 832 JVM_END
 833 
 834 
 835 // Returns a class loaded by the bootstrap class loader; or null
 836 // if not found.  ClassNotFoundException is not thrown.
 837 // FindClassFromBootLoader is exported to the launcher for windows.
 838 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 839                                               const char* name))
 840   JVMWrapper("JVM_FindClassFromBootLoader");
 841 
 842   // Java libraries should ensure that name is never null...
 843   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 844     // It's impossible to create this class;  the name cannot fit
 845     // into the constant pool.
 846     return NULL;
 847   }
 848 
 849   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 850   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 851   if (k == NULL) {
 852     return NULL;
 853   }
 854 
 855   if (log_is_enabled(Debug, class, resolve)) {
 856     trace_class_resolution(k);
 857   }
 858   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 859 JVM_END
 860 
 861 // Find a class with this name in this loader, using the caller's protection domain.
 862 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
 863                                           jboolean init, jobject loader,
 864                                           jclass caller))
 865   JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
 866   // Java libraries should ensure that name is never null...
 867   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 868     // It's impossible to create this class;  the name cannot fit
 869     // into the constant pool.
 870     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 871   }
 872 
 873   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 874 
 875   oop loader_oop = JNIHandles::resolve(loader);
 876   oop from_class = JNIHandles::resolve(caller);
 877   oop protection_domain = NULL;
 878   // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
 879   // NPE. Put it in another way, the bootstrap class loader has all permission and
 880   // thus no checkPackageAccess equivalence in the VM class loader.
 881   // The caller is also passed as NULL by the java code if there is no security
 882   // manager to avoid the performance cost of getting the calling class.
 883   if (from_class != NULL && loader_oop != NULL) {
 884     protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
 885   }
 886 
 887   Handle h_loader(THREAD, loader_oop);
 888   Handle h_prot(THREAD, protection_domain);
 889 
 890   jboolean link = !ClassForNameDeferLinking;
 891   jclass result = find_class_from_class_loader(env, h_name, init, link, h_loader,
 892                                                h_prot, false, THREAD);
 893   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 894     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 895   }
 896   return result;
 897 JVM_END
 898 
 899 // Currently only called from the old verifier.
 900 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 901                                          jboolean init, jclass from))
 902   JVMWrapper("JVM_FindClassFromClass");
 903   if (name == NULL) {
 904     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 905   }
 906   if ((int)strlen(name) > Symbol::max_length()) {
 907     // It's impossible to create this class;  the name cannot fit
 908     // into the constant pool.
 909     Exceptions::fthrow(THREAD_AND_LOCATION,
 910                        vmSymbols::java_lang_NoClassDefFoundError(),
 911                        "Class name exceeds maximum length of %d: %s",
 912                        Symbol::max_length(),
 913                        name);
 914     return 0;
 915   }
 916   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 917   oop from_class_oop = JNIHandles::resolve(from);
 918   Klass* from_class = (from_class_oop == NULL)
 919                            ? (Klass*)NULL
 920                            : java_lang_Class::as_Klass(from_class_oop);
 921   oop class_loader = NULL;
 922   oop protection_domain = NULL;
 923   if (from_class != NULL) {
 924     class_loader = from_class->class_loader();
 925     protection_domain = from_class->protection_domain();
 926   }
 927   Handle h_loader(THREAD, class_loader);
 928   Handle h_prot  (THREAD, protection_domain);
 929   jclass result = find_class_from_class_loader(env, h_name, init, false, h_loader,
 930                                                h_prot, true, thread);
 931 
 932   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 933     // this function is generally only used for class loading during verification.
 934     ResourceMark rm;
 935     oop from_mirror = JNIHandles::resolve_non_null(from);
 936     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 937     const char * from_name = from_class->external_name();
 938 
 939     oop mirror = JNIHandles::resolve_non_null(result);
 940     Klass* to_class = java_lang_Class::as_Klass(mirror);
 941     const char * to = to_class->external_name();
 942     log_debug(class, resolve)("%s %s (verification)", from_name, to);
 943   }
 944 
 945   return result;
 946 JVM_END
 947 
 948 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 949   if (loader.is_null()) {
 950     return;
 951   }
 952 
 953   // check whether the current caller thread holds the lock or not.
 954   // If not, increment the corresponding counter
 955   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 956       ObjectSynchronizer::owner_self) {
 957     counter->inc();
 958   }
 959 }
 960 
 961 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 962 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 963                                       jobject loader, const jbyte *buf,
 964                                       jsize len, jobject pd, const char *source,
 965                                       TRAPS) {
 966   if (source == NULL)  source = "__JVM_DefineClass__";
 967 
 968   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 969   JavaThread* jt = (JavaThread*) THREAD;
 970 
 971   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 972                              ClassLoader::perf_define_appclass_selftime(),
 973                              ClassLoader::perf_define_appclasses(),
 974                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 975                              jt->get_thread_stat()->perf_timers_addr(),
 976                              PerfClassTraceTime::DEFINE_CLASS);
 977 
 978   if (UsePerfData) {
 979     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 980   }
 981 
 982   // Since exceptions can be thrown, class initialization can take place
 983   // if name is NULL no check for class name in .class stream has to be made.
 984   TempNewSymbol class_name = NULL;
 985   if (name != NULL) {
 986     const int str_len = (int)strlen(name);
 987     if (str_len > Symbol::max_length()) {
 988       // It's impossible to create this class;  the name cannot fit
 989       // into the constant pool.
 990       Exceptions::fthrow(THREAD_AND_LOCATION,
 991                          vmSymbols::java_lang_NoClassDefFoundError(),
 992                          "Class name exceeds maximum length of %d: %s",
 993                          Symbol::max_length(),
 994                          name);
 995       return 0;
 996     }
 997     class_name = SymbolTable::new_symbol(name, str_len);
 998   }
 999 
1000   ResourceMark rm(THREAD);
1001   ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
1002   Handle class_loader (THREAD, JNIHandles::resolve(loader));
1003   if (UsePerfData) {
1004     is_lock_held_by_thread(class_loader,
1005                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
1006                            THREAD);
1007   }
1008   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1009   Klass* k = SystemDictionary::resolve_from_stream(class_name,
1010                                                    class_loader,
1011                                                    protection_domain,
1012                                                    &st,
1013                                                    CHECK_NULL);
1014 
1015   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
1016     trace_class_resolution(k);
1017   }
1018 
1019   return (jclass) JNIHandles::make_local(env, k->java_mirror());
1020 }
1021 
1022 
1023 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1024   JVMWrapper("JVM_DefineClass");
1025 
1026   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
1027 JVM_END
1028 
1029 
1030 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1031   JVMWrapper("JVM_DefineClassWithSource");
1032 
1033   return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
1034 JVM_END
1035 
1036 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1037   JVMWrapper("JVM_FindLoadedClass");
1038   ResourceMark rm(THREAD);
1039 
1040   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1041   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1042 
1043   const char* str   = java_lang_String::as_utf8_string(string());
1044   // Sanity check, don't expect null
1045   if (str == NULL) return NULL;
1046 
1047   const int str_len = (int)strlen(str);
1048   if (str_len > Symbol::max_length()) {
1049     // It's impossible to create this class;  the name cannot fit
1050     // into the constant pool.
1051     return NULL;
1052   }
1053   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1054 
1055   // Security Note:
1056   //   The Java level wrapper will perform the necessary security check allowing
1057   //   us to pass the NULL as the initiating class loader.
1058   Handle h_loader(THREAD, JNIHandles::resolve(loader));
1059   if (UsePerfData) {
1060     is_lock_held_by_thread(h_loader,
1061                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1062                            THREAD);
1063   }
1064 
1065   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1066                                                               h_loader,
1067                                                               Handle(),
1068                                                               CHECK_NULL);
1069 #if INCLUDE_CDS
1070   if (k == NULL) {
1071     // If the class is not already loaded, try to see if it's in the shared
1072     // archive for the current classloader (h_loader).
1073     k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1074   }
1075 #endif
1076   return (k == NULL) ? NULL :
1077             (jclass) JNIHandles::make_local(env, k->java_mirror());
1078 JVM_END
1079 
1080 // Module support //////////////////////////////////////////////////////////////////////////////
1081 
1082 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1083                                  jstring location, const char* const* packages, jsize num_packages))
1084   JVMWrapper("JVM_DefineModule");
1085   Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1086 JVM_END
1087 
1088 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1089   JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1090   Modules::set_bootloader_unnamed_module(module, CHECK);
1091 JVM_END
1092 
1093 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1094   JVMWrapper("JVM_AddModuleExports");
1095   Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1096 JVM_END
1097 
1098 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1099   JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1100   Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1101 JVM_END
1102 
1103 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1104   JVMWrapper("JVM_AddModuleExportsToAll");
1105   Modules::add_module_exports(from_module, package, NULL, CHECK);
1106 JVM_END
1107 
1108 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1109   JVMWrapper("JVM_AddReadsModule");
1110   Modules::add_reads_module(from_module, source_module, CHECK);
1111 JVM_END
1112 
1113 // Reflection support //////////////////////////////////////////////////////////////////////////////
1114 
1115 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1116   assert (cls != NULL, "illegal class");
1117   JVMWrapper("JVM_InitClassName");
1118   JvmtiVMObjectAllocEventCollector oam;
1119   ResourceMark rm(THREAD);
1120   HandleMark hm(THREAD);
1121   Handle java_class(THREAD, JNIHandles::resolve(cls));
1122   oop result = java_lang_Class::name(java_class, CHECK_NULL);
1123   return (jstring) JNIHandles::make_local(env, result);
1124 JVM_END
1125 
1126 
1127 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1128   JVMWrapper("JVM_GetClassInterfaces");
1129   JvmtiVMObjectAllocEventCollector oam;
1130   oop mirror = JNIHandles::resolve_non_null(cls);
1131 
1132   // Special handling for primitive objects
1133   if (java_lang_Class::is_primitive(mirror)) {
1134     // Primitive objects does not have any interfaces
1135     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1136     return (jobjectArray) JNIHandles::make_local(env, r);
1137   }
1138 
1139   Klass* klass = java_lang_Class::as_Klass(mirror);
1140   // Figure size of result array
1141   int size;
1142   if (klass->is_instance_klass()) {
1143     size = InstanceKlass::cast(klass)->local_interfaces()->length();
1144   } else {
1145     assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1146     size = 2;
1147   }
1148 
1149   // Allocate result array
1150   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1151   objArrayHandle result (THREAD, r);
1152   // Fill in result
1153   if (klass->is_instance_klass()) {
1154     // Regular instance klass, fill in all local interfaces
1155     for (int index = 0; index < size; index++) {
1156       Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1157       result->obj_at_put(index, k->java_mirror());
1158     }
1159   } else {
1160     // All arrays implement java.lang.Cloneable and java.io.Serializable
1161     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1162     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1163   }
1164   return (jobjectArray) JNIHandles::make_local(env, result());
1165 JVM_END
1166 
1167 
1168 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1169   JVMWrapper("JVM_IsInterface");
1170   oop mirror = JNIHandles::resolve_non_null(cls);
1171   if (java_lang_Class::is_primitive(mirror)) {
1172     return JNI_FALSE;
1173   }
1174   Klass* k = java_lang_Class::as_Klass(mirror);
1175   jboolean result = k->is_interface();
1176   assert(!result || k->is_instance_klass(),
1177          "all interfaces are instance types");
1178   // The compiler intrinsic for isInterface tests the
1179   // Klass::_access_flags bits in the same way.
1180   return result;
1181 JVM_END
1182 
1183 
1184 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1185   JVMWrapper("JVM_GetClassSigners");
1186   JvmtiVMObjectAllocEventCollector oam;
1187   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1188     // There are no signers for primitive types
1189     return NULL;
1190   }
1191 
1192   objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1193 
1194   // If there are no signers set in the class, or if the class
1195   // is an array, return NULL.
1196   if (signers == NULL) return NULL;
1197 
1198   // copy of the signers array
1199   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1200   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1201   for (int index = 0; index < signers->length(); index++) {
1202     signers_copy->obj_at_put(index, signers->obj_at(index));
1203   }
1204 
1205   // return the copy
1206   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1207 JVM_END
1208 
1209 
1210 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1211   JVMWrapper("JVM_SetClassSigners");
1212   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1213     // This call is ignored for primitive types and arrays.
1214     // Signers are only set once, ClassLoader.java, and thus shouldn't
1215     // be called with an array.  Only the bootstrap loader creates arrays.
1216     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1217     if (k->is_instance_klass()) {
1218       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1219     }
1220   }
1221 JVM_END
1222 
1223 
1224 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1225   JVMWrapper("JVM_GetProtectionDomain");
1226   if (JNIHandles::resolve(cls) == NULL) {
1227     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1228   }
1229 
1230   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1231     // Primitive types does not have a protection domain.
1232     return NULL;
1233   }
1234 
1235   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1236   return (jobject) JNIHandles::make_local(env, pd);
1237 JVM_END
1238 
1239 
1240 // Returns the inherited_access_control_context field of the running thread.
1241 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1242   JVMWrapper("JVM_GetInheritedAccessControlContext");
1243   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1244   return JNIHandles::make_local(env, result);
1245 JVM_END
1246 
1247 class RegisterArrayForGC {
1248  private:
1249   JavaThread *_thread;
1250  public:
1251   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1252     _thread = thread;
1253     _thread->register_array_for_gc(array);
1254   }
1255 
1256   ~RegisterArrayForGC() {
1257     _thread->register_array_for_gc(NULL);
1258   }
1259 };
1260 
1261 
1262 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1263   JVMWrapper("JVM_GetStackAccessControlContext");
1264   if (!UsePrivilegedStack) return NULL;
1265 
1266   ResourceMark rm(THREAD);
1267   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1268   JvmtiVMObjectAllocEventCollector oam;
1269 
1270   // count the protection domains on the execution stack. We collapse
1271   // duplicate consecutive protection domains into a single one, as
1272   // well as stopping when we hit a privileged frame.
1273 
1274   oop previous_protection_domain = NULL;
1275   Handle privileged_context(thread, NULL);
1276   bool is_privileged = false;
1277   oop protection_domain = NULL;
1278 
1279   // Iterate through Java frames
1280   vframeStream vfst(thread);
1281   for(; !vfst.at_end(); vfst.next()) {
1282     // get method of frame
1283     Method* method = vfst.method();
1284 
1285     // stop at the first privileged frame
1286     if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1287       method->name() == vmSymbols::executePrivileged_name())
1288     {
1289       // this frame is privileged
1290       is_privileged = true;
1291 
1292       javaVFrame *priv = vfst.asJavaVFrame();       // executePrivileged
1293 
1294       StackValueCollection* locals = priv->locals();
1295       StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1296       StackValue* clr_sv = locals->at(2); // Class<?> caller
1297       assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1298       assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1299       privileged_context    = ctx_sv->get_obj();
1300       Handle caller         = clr_sv->get_obj();
1301 
1302       Klass *caller_klass = java_lang_Class::as_Klass(caller());
1303       protection_domain  = caller_klass->protection_domain();
1304     } else {
1305       protection_domain = method->method_holder()->protection_domain();
1306     }
1307 
1308     if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1309       local_array->push(protection_domain);
1310       previous_protection_domain = protection_domain;
1311     }
1312 
1313     if (is_privileged) break;
1314   }
1315 
1316 
1317   // either all the domains on the stack were system domains, or
1318   // we had a privileged system domain
1319   if (local_array->is_empty()) {
1320     if (is_privileged && privileged_context.is_null()) return NULL;
1321 
1322     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1323     return JNIHandles::make_local(env, result);
1324   }
1325 
1326   // the resource area must be registered in case of a gc
1327   RegisterArrayForGC ragc(thread, local_array);
1328   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1329                                                  local_array->length(), CHECK_NULL);
1330   objArrayHandle h_context(thread, context);
1331   for (int index = 0; index < local_array->length(); index++) {
1332     h_context->obj_at_put(index, local_array->at(index));
1333   }
1334 
1335   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1336 
1337   return JNIHandles::make_local(env, result);
1338 JVM_END
1339 
1340 
1341 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1342   JVMWrapper("JVM_IsArrayClass");
1343   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1344   return (k != NULL) && k->is_array_klass() ? true : false;
1345 JVM_END
1346 
1347 
1348 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1349   JVMWrapper("JVM_IsPrimitiveClass");
1350   oop mirror = JNIHandles::resolve_non_null(cls);
1351   return (jboolean) java_lang_Class::is_primitive(mirror);
1352 JVM_END
1353 
1354 
1355 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1356   JVMWrapper("JVM_GetClassModifiers");
1357   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1358     // Primitive type
1359     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1360   }
1361 
1362   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1363   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1364   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1365   return k->modifier_flags();
1366 JVM_END
1367 
1368 
1369 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1370 
1371 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1372   JvmtiVMObjectAllocEventCollector oam;
1373   // ofClass is a reference to a java_lang_Class object. The mirror object
1374   // of an InstanceKlass
1375 
1376   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1377       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1378     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1379     return (jobjectArray)JNIHandles::make_local(env, result);
1380   }
1381 
1382   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1383   InnerClassesIterator iter(k);
1384 
1385   if (iter.length() == 0) {
1386     // Neither an inner nor outer class
1387     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1388     return (jobjectArray)JNIHandles::make_local(env, result);
1389   }
1390 
1391   // find inner class info
1392   constantPoolHandle cp(thread, k->constants());
1393   int length = iter.length();
1394 
1395   // Allocate temp. result array
1396   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1397   objArrayHandle result (THREAD, r);
1398   int members = 0;
1399 
1400   for (; !iter.done(); iter.next()) {
1401     int ioff = iter.inner_class_info_index();
1402     int ooff = iter.outer_class_info_index();
1403 
1404     if (ioff != 0 && ooff != 0) {
1405       // Check to see if the name matches the class we're looking for
1406       // before attempting to find the class.
1407       if (cp->klass_name_at_matches(k, ooff)) {
1408         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1409         if (outer_klass == k) {
1410            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1411            InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1412 
1413            // Throws an exception if outer klass has not declared k as
1414            // an inner klass
1415            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1416 
1417            result->obj_at_put(members, inner_klass->java_mirror());
1418            members++;
1419         }
1420       }
1421     }
1422   }
1423 
1424   if (members != length) {
1425     // Return array of right length
1426     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1427     for(int i = 0; i < members; i++) {
1428       res->obj_at_put(i, result->obj_at(i));
1429     }
1430     return (jobjectArray)JNIHandles::make_local(env, res);
1431   }
1432 
1433   return (jobjectArray)JNIHandles::make_local(env, result());
1434 JVM_END
1435 
1436 
1437 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1438 {
1439   // ofClass is a reference to a java_lang_Class object.
1440   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1441       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1442     return NULL;
1443   }
1444 
1445   bool inner_is_member = false;
1446   Klass* outer_klass
1447     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1448                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1449   if (outer_klass == NULL)  return NULL;  // already a top-level class
1450   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1451   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1452 }
1453 JVM_END
1454 
1455 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1456 {
1457   oop mirror = JNIHandles::resolve_non_null(cls);
1458   if (java_lang_Class::is_primitive(mirror) ||
1459       !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1460     return NULL;
1461   }
1462   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1463   int ooff = 0, noff = 0;
1464   if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1465     if (noff != 0) {
1466       constantPoolHandle i_cp(thread, k->constants());
1467       Symbol* name = i_cp->symbol_at(noff);
1468       Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1469       return (jstring) JNIHandles::make_local(env, str());
1470     }
1471   }
1472   return NULL;
1473 }
1474 JVM_END
1475 
1476 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1477   assert (cls != NULL, "illegal class");
1478   JVMWrapper("JVM_GetClassSignature");
1479   JvmtiVMObjectAllocEventCollector oam;
1480   ResourceMark rm(THREAD);
1481   // Return null for arrays and primatives
1482   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1483     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1484     if (k->is_instance_klass()) {
1485       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1486       if (sym == NULL) return NULL;
1487       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1488       return (jstring) JNIHandles::make_local(env, str());
1489     }
1490   }
1491   return NULL;
1492 JVM_END
1493 
1494 
1495 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1496   assert (cls != NULL, "illegal class");
1497   JVMWrapper("JVM_GetClassAnnotations");
1498 
1499   // Return null for arrays and primitives
1500   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1501     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1502     if (k->is_instance_klass()) {
1503       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1504       return (jbyteArray) JNIHandles::make_local(env, a);
1505     }
1506   }
1507   return NULL;
1508 JVM_END
1509 
1510 
1511 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1512   // some of this code was adapted from from jni_FromReflectedField
1513 
1514   oop reflected = JNIHandles::resolve_non_null(field);
1515   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1516   Klass* k    = java_lang_Class::as_Klass(mirror);
1517   int slot      = java_lang_reflect_Field::slot(reflected);
1518   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1519 
1520   InstanceKlass* ik = InstanceKlass::cast(k);
1521   intptr_t offset = ik->field_offset(slot);
1522 
1523   if (modifiers & JVM_ACC_STATIC) {
1524     // for static fields we only look in the current class
1525     if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1526       assert(false, "cannot find static field");
1527       return false;
1528     }
1529   } else {
1530     // for instance fields we start with the current class and work
1531     // our way up through the superclass chain
1532     if (!ik->find_field_from_offset(offset, false, &fd)) {
1533       assert(false, "cannot find instance field");
1534       return false;
1535     }
1536   }
1537   return true;
1538 }
1539 
1540 static Method* jvm_get_method_common(jobject method) {
1541   // some of this code was adapted from from jni_FromReflectedMethod
1542 
1543   oop reflected = JNIHandles::resolve_non_null(method);
1544   oop mirror    = NULL;
1545   int slot      = 0;
1546 
1547   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1548     mirror = java_lang_reflect_Constructor::clazz(reflected);
1549     slot   = java_lang_reflect_Constructor::slot(reflected);
1550   } else {
1551     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1552            "wrong type");
1553     mirror = java_lang_reflect_Method::clazz(reflected);
1554     slot   = java_lang_reflect_Method::slot(reflected);
1555   }
1556   Klass* k = java_lang_Class::as_Klass(mirror);
1557 
1558   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1559   assert(m != NULL, "cannot find method");
1560   return m;  // caller has to deal with NULL in product mode
1561 }
1562 
1563 /* Type use annotations support (JDK 1.8) */
1564 
1565 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1566   assert (cls != NULL, "illegal class");
1567   JVMWrapper("JVM_GetClassTypeAnnotations");
1568   ResourceMark rm(THREAD);
1569   // Return null for arrays and primitives
1570   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1571     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1572     if (k->is_instance_klass()) {
1573       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1574       if (type_annotations != NULL) {
1575         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1576         return (jbyteArray) JNIHandles::make_local(env, a);
1577       }
1578     }
1579   }
1580   return NULL;
1581 JVM_END
1582 
1583 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1584   assert (method != NULL, "illegal method");
1585   JVMWrapper("JVM_GetMethodTypeAnnotations");
1586 
1587   // method is a handle to a java.lang.reflect.Method object
1588   Method* m = jvm_get_method_common(method);
1589   if (m == NULL) {
1590     return NULL;
1591   }
1592 
1593   AnnotationArray* type_annotations = m->type_annotations();
1594   if (type_annotations != NULL) {
1595     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1596     return (jbyteArray) JNIHandles::make_local(env, a);
1597   }
1598 
1599   return NULL;
1600 JVM_END
1601 
1602 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1603   assert (field != NULL, "illegal field");
1604   JVMWrapper("JVM_GetFieldTypeAnnotations");
1605 
1606   fieldDescriptor fd;
1607   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1608   if (!gotFd) {
1609     return NULL;
1610   }
1611 
1612   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1613 JVM_END
1614 
1615 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1616   if (!cp->is_within_bounds(index)) {
1617     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1618   }
1619 }
1620 
1621 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1622 {
1623   JVMWrapper("JVM_GetMethodParameters");
1624   // method is a handle to a java.lang.reflect.Method object
1625   Method* method_ptr = jvm_get_method_common(method);
1626   methodHandle mh (THREAD, method_ptr);
1627   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1628   const int num_params = mh->method_parameters_length();
1629 
1630   if (num_params < 0) {
1631     // A -1 return value from method_parameters_length means there is no
1632     // parameter data.  Return null to indicate this to the reflection
1633     // API.
1634     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1635     return (jobjectArray)NULL;
1636   } else {
1637     // Otherwise, we return something up to reflection, even if it is
1638     // a zero-length array.  Why?  Because in some cases this can
1639     // trigger a MalformedParametersException.
1640 
1641     // make sure all the symbols are properly formatted
1642     for (int i = 0; i < num_params; i++) {
1643       MethodParametersElement* params = mh->method_parameters_start();
1644       int index = params[i].name_cp_index;
1645       bounds_check(mh->constants(), index, CHECK_NULL);
1646 
1647       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1648         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1649                     "Wrong type at constant pool index");
1650       }
1651 
1652     }
1653 
1654     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1655     objArrayHandle result (THREAD, result_oop);
1656 
1657     for (int i = 0; i < num_params; i++) {
1658       MethodParametersElement* params = mh->method_parameters_start();
1659       // For a 0 index, give a NULL symbol
1660       Symbol* sym = 0 != params[i].name_cp_index ?
1661         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1662       int flags = params[i].flags;
1663       oop param = Reflection::new_parameter(reflected_method, i, sym,
1664                                             flags, CHECK_NULL);
1665       result->obj_at_put(i, param);
1666     }
1667     return (jobjectArray)JNIHandles::make_local(env, result());
1668   }
1669 }
1670 JVM_END
1671 
1672 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1673 
1674 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1675 {
1676   JVMWrapper("JVM_GetClassDeclaredFields");
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(SystemDictionary::reflect_Field_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   constantPoolHandle cp(THREAD, k->constants());
1689 
1690   // Ensure class is linked
1691   k->link_class(CHECK_NULL);
1692 
1693   // Allocate result
1694   int num_fields;
1695 
1696   if (publicOnly) {
1697     num_fields = 0;
1698     for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1699       if (fs.access_flags().is_public()) ++num_fields;
1700     }
1701   } else {
1702     num_fields = k->java_fields_count();
1703   }
1704 
1705   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1706   objArrayHandle result (THREAD, r);
1707 
1708   int out_idx = 0;
1709   fieldDescriptor fd;
1710   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1711     if (!publicOnly || fs.access_flags().is_public()) {
1712       fd.reinitialize(k, fs.index());
1713       oop field = Reflection::new_field(&fd, CHECK_NULL);
1714       result->obj_at_put(out_idx, field);
1715       ++out_idx;
1716     }
1717   }
1718   assert(out_idx == num_fields, "just checking");
1719   return (jobjectArray) JNIHandles::make_local(env, result());
1720 }
1721 JVM_END
1722 
1723 static bool select_method(const methodHandle& method, bool want_constructor) {
1724   if (want_constructor) {
1725     return (method->is_initializer() && !method->is_static());
1726   } else {
1727     return  (!method->is_initializer() && !method->is_overpass());
1728   }
1729 }
1730 
1731 static jobjectArray get_class_declared_methods_helper(
1732                                   JNIEnv *env,
1733                                   jclass ofClass, jboolean publicOnly,
1734                                   bool want_constructor,
1735                                   Klass* klass, TRAPS) {
1736 
1737   JvmtiVMObjectAllocEventCollector oam;
1738 
1739   // Exclude primitive types and array types
1740   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1741       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1742     // Return empty array
1743     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1744     return (jobjectArray) JNIHandles::make_local(env, res);
1745   }
1746 
1747   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1748 
1749   // Ensure class is linked
1750   k->link_class(CHECK_NULL);
1751 
1752   Array<Method*>* methods = k->methods();
1753   int methods_length = methods->length();
1754 
1755   // Save original method_idnum in case of redefinition, which can change
1756   // the idnum of obsolete methods.  The new method will have the same idnum
1757   // but if we refresh the methods array, the counts will be wrong.
1758   ResourceMark rm(THREAD);
1759   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1760   int num_methods = 0;
1761 
1762   for (int i = 0; i < methods_length; i++) {
1763     methodHandle method(THREAD, methods->at(i));
1764     if (select_method(method, want_constructor)) {
1765       if (!publicOnly || method->is_public()) {
1766         idnums->push(method->method_idnum());
1767         ++num_methods;
1768       }
1769     }
1770   }
1771 
1772   // Allocate result
1773   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1774   objArrayHandle result (THREAD, r);
1775 
1776   // Now just put the methods that we selected above, but go by their idnum
1777   // in case of redefinition.  The methods can be redefined at any safepoint,
1778   // so above when allocating the oop array and below when creating reflect
1779   // objects.
1780   for (int i = 0; i < num_methods; i++) {
1781     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1782     if (method.is_null()) {
1783       // Method may have been deleted and seems this API can handle null
1784       // Otherwise should probably put a method that throws NSME
1785       result->obj_at_put(i, NULL);
1786     } else {
1787       oop m;
1788       if (want_constructor) {
1789         m = Reflection::new_constructor(method, CHECK_NULL);
1790       } else {
1791         m = Reflection::new_method(method, false, CHECK_NULL);
1792       }
1793       result->obj_at_put(i, m);
1794     }
1795   }
1796 
1797   return (jobjectArray) JNIHandles::make_local(env, result());
1798 }
1799 
1800 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1801 {
1802   JVMWrapper("JVM_GetClassDeclaredMethods");
1803   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1804                                            /*want_constructor*/ false,
1805                                            SystemDictionary::reflect_Method_klass(), THREAD);
1806 }
1807 JVM_END
1808 
1809 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1810 {
1811   JVMWrapper("JVM_GetClassDeclaredConstructors");
1812   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1813                                            /*want_constructor*/ true,
1814                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
1815 }
1816 JVM_END
1817 
1818 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1819 {
1820   JVMWrapper("JVM_GetClassAccessFlags");
1821   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1822     // Primitive type
1823     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1824   }
1825 
1826   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1827   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1828 }
1829 JVM_END
1830 
1831 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1832 {
1833   JVMWrapper("JVM_AreNestMates");
1834   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1835   assert(c->is_instance_klass(), "must be");
1836   InstanceKlass* ck = InstanceKlass::cast(c);
1837   Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1838   assert(m->is_instance_klass(), "must be");
1839   InstanceKlass* mk = InstanceKlass::cast(m);
1840   return ck->has_nestmate_access_to(mk, THREAD);
1841 }
1842 JVM_END
1843 
1844 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1845 {
1846   // current is not a primitive or array class
1847   JVMWrapper("JVM_GetNestHost");
1848   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1849   assert(c->is_instance_klass(), "must be");
1850   InstanceKlass* ck = InstanceKlass::cast(c);
1851   // Don't post exceptions if validation fails
1852   InstanceKlass* host = ck->nest_host(NULL, THREAD);
1853   return (jclass) (host == NULL ? NULL :
1854                    JNIHandles::make_local(THREAD, host->java_mirror()));
1855 }
1856 JVM_END
1857 
1858 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1859 {
1860   // current is not a primitive or array class
1861   JVMWrapper("JVM_GetNestMembers");
1862   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1863   assert(c->is_instance_klass(), "must be");
1864   InstanceKlass* ck = InstanceKlass::cast(c);
1865   // Get the nest host for this nest - throw ICCE if validation fails
1866   Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1867   InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1868 
1869   {
1870     JvmtiVMObjectAllocEventCollector oam;
1871     Array<u2>* members = host->nest_members();
1872     int length = members == NULL ? 0 : members->length();
1873     // nest host is first in the array so make it one bigger
1874     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1875                                              length + 1, CHECK_NULL);
1876     objArrayHandle result (THREAD, r);
1877     result->obj_at_put(0, host->java_mirror());
1878     if (length != 0) {
1879       int i;
1880       for (i = 0; i < length; i++) {
1881          int cp_index = members->at(i);
1882          Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1883          if (k->is_instance_klass()) {
1884            InstanceKlass* nest_host_k =
1885              InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1886            if (nest_host_k == host) {
1887              result->obj_at_put(i+1, k->java_mirror());
1888            }
1889            else {
1890              // k's nest host is legal but it isn't our host so
1891              // throw ICCE
1892              ResourceMark rm(THREAD);
1893              Exceptions::fthrow(THREAD_AND_LOCATION,
1894                                 icce,
1895                                 "Nest member %s in %s declares a different nest host of %s",
1896                                 k->external_name(),
1897                                 host->external_name(),
1898                                 nest_host_k->external_name()
1899                            );
1900              return NULL;
1901            }
1902          }
1903          else {
1904            // we have a bad nest member entry - throw ICCE
1905            ResourceMark rm(THREAD);
1906            Exceptions::fthrow(THREAD_AND_LOCATION,
1907                               icce,
1908                               "Class %s can not be a nest member of %s",
1909                               k->external_name(),
1910                               host->external_name()
1911                               );
1912            return NULL;
1913          }
1914       }
1915     }
1916     else {
1917       assert(host == ck, "must be singleton nest");
1918     }
1919     return (jobjectArray)JNIHandles::make_local(THREAD, result());
1920   }
1921 }
1922 JVM_END
1923 
1924 // Constant pool access //////////////////////////////////////////////////////////
1925 
1926 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1927 {
1928   JVMWrapper("JVM_GetClassConstantPool");
1929   JvmtiVMObjectAllocEventCollector oam;
1930 
1931   // Return null for primitives and arrays
1932   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1933     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1934     if (k->is_instance_klass()) {
1935       InstanceKlass* k_h = InstanceKlass::cast(k);
1936       Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1937       reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1938       return JNIHandles::make_local(jcp());
1939     }
1940   }
1941   return NULL;
1942 }
1943 JVM_END
1944 
1945 
1946 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1947 {
1948   JVMWrapper("JVM_ConstantPoolGetSize");
1949   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1950   return cp->length();
1951 }
1952 JVM_END
1953 
1954 
1955 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1956 {
1957   JVMWrapper("JVM_ConstantPoolGetClassAt");
1958   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1959   bounds_check(cp, index, CHECK_NULL);
1960   constantTag tag = cp->tag_at(index);
1961   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1962     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1963   }
1964   Klass* k = cp->klass_at(index, CHECK_NULL);
1965   return (jclass) JNIHandles::make_local(k->java_mirror());
1966 }
1967 JVM_END
1968 
1969 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1970 {
1971   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1972   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1973   bounds_check(cp, index, CHECK_NULL);
1974   constantTag tag = cp->tag_at(index);
1975   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1976     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1977   }
1978   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1979   if (k == NULL) return NULL;
1980   return (jclass) JNIHandles::make_local(k->java_mirror());
1981 }
1982 JVM_END
1983 
1984 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1985   constantTag tag = cp->tag_at(index);
1986   if (!tag.is_method() && !tag.is_interface_method()) {
1987     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1988   }
1989   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1990   Klass* k_o;
1991   if (force_resolution) {
1992     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1993   } else {
1994     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1995     if (k_o == NULL) return NULL;
1996   }
1997   InstanceKlass* k = InstanceKlass::cast(k_o);
1998   Symbol* name = cp->uncached_name_ref_at(index);
1999   Symbol* sig  = cp->uncached_signature_ref_at(index);
2000   methodHandle m (THREAD, k->find_method(name, sig));
2001   if (m.is_null()) {
2002     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2003   }
2004   oop method;
2005   if (!m->is_initializer() || m->is_static()) {
2006     method = Reflection::new_method(m, true, CHECK_NULL);
2007   } else {
2008     method = Reflection::new_constructor(m, CHECK_NULL);
2009   }
2010   return JNIHandles::make_local(method);
2011 }
2012 
2013 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2014 {
2015   JVMWrapper("JVM_ConstantPoolGetMethodAt");
2016   JvmtiVMObjectAllocEventCollector oam;
2017   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2018   bounds_check(cp, index, CHECK_NULL);
2019   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2020   return res;
2021 }
2022 JVM_END
2023 
2024 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2025 {
2026   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2027   JvmtiVMObjectAllocEventCollector oam;
2028   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2029   bounds_check(cp, index, CHECK_NULL);
2030   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2031   return res;
2032 }
2033 JVM_END
2034 
2035 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2036   constantTag tag = cp->tag_at(index);
2037   if (!tag.is_field()) {
2038     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2039   }
2040   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2041   Klass* k_o;
2042   if (force_resolution) {
2043     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2044   } else {
2045     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2046     if (k_o == NULL) return NULL;
2047   }
2048   InstanceKlass* k = InstanceKlass::cast(k_o);
2049   Symbol* name = cp->uncached_name_ref_at(index);
2050   Symbol* sig  = cp->uncached_signature_ref_at(index);
2051   fieldDescriptor fd;
2052   Klass* target_klass = k->find_field(name, sig, &fd);
2053   if (target_klass == NULL) {
2054     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2055   }
2056   oop field = Reflection::new_field(&fd, CHECK_NULL);
2057   return JNIHandles::make_local(field);
2058 }
2059 
2060 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2061 {
2062   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2063   JvmtiVMObjectAllocEventCollector oam;
2064   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2065   bounds_check(cp, index, CHECK_NULL);
2066   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2067   return res;
2068 }
2069 JVM_END
2070 
2071 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2072 {
2073   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2074   JvmtiVMObjectAllocEventCollector oam;
2075   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2076   bounds_check(cp, index, CHECK_NULL);
2077   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2078   return res;
2079 }
2080 JVM_END
2081 
2082 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2083 {
2084   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2085   JvmtiVMObjectAllocEventCollector oam;
2086   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2087   bounds_check(cp, index, CHECK_NULL);
2088   constantTag tag = cp->tag_at(index);
2089   if (!tag.is_field_or_method()) {
2090     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2091   }
2092   int klass_ref = cp->uncached_klass_ref_index_at(index);
2093   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2094   Symbol*  member_name = cp->uncached_name_ref_at(index);
2095   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2096   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2097   objArrayHandle dest(THREAD, dest_o);
2098   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2099   dest->obj_at_put(0, str());
2100   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2101   dest->obj_at_put(1, str());
2102   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2103   dest->obj_at_put(2, str());
2104   return (jobjectArray) JNIHandles::make_local(dest());
2105 }
2106 JVM_END
2107 
2108 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2109 {
2110   JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2111   JvmtiVMObjectAllocEventCollector oam;
2112   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2113   bounds_check(cp, index, CHECK_0);
2114   constantTag tag = cp->tag_at(index);
2115   if (!tag.is_field_or_method()) {
2116     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2117   }
2118   return (jint) cp->uncached_klass_ref_index_at(index);
2119 }
2120 JVM_END
2121 
2122 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2123 {
2124   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2125   JvmtiVMObjectAllocEventCollector oam;
2126   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2127   bounds_check(cp, index, CHECK_0);
2128   constantTag tag = cp->tag_at(index);
2129   if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2130     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2131   }
2132   return (jint) cp->uncached_name_and_type_ref_index_at(index);
2133 }
2134 JVM_END
2135 
2136 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2137 {
2138   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2139   JvmtiVMObjectAllocEventCollector oam;
2140   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2141   bounds_check(cp, index, CHECK_NULL);
2142   constantTag tag = cp->tag_at(index);
2143   if (!tag.is_name_and_type()) {
2144     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2145   }
2146   Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2147   Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2148   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2149   objArrayHandle dest(THREAD, dest_o);
2150   Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2151   dest->obj_at_put(0, str());
2152   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2153   dest->obj_at_put(1, str());
2154   return (jobjectArray) JNIHandles::make_local(dest());
2155 }
2156 JVM_END
2157 
2158 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2159 {
2160   JVMWrapper("JVM_ConstantPoolGetIntAt");
2161   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2162   bounds_check(cp, index, CHECK_0);
2163   constantTag tag = cp->tag_at(index);
2164   if (!tag.is_int()) {
2165     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2166   }
2167   return cp->int_at(index);
2168 }
2169 JVM_END
2170 
2171 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2172 {
2173   JVMWrapper("JVM_ConstantPoolGetLongAt");
2174   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2175   bounds_check(cp, index, CHECK_(0L));
2176   constantTag tag = cp->tag_at(index);
2177   if (!tag.is_long()) {
2178     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2179   }
2180   return cp->long_at(index);
2181 }
2182 JVM_END
2183 
2184 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2185 {
2186   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2187   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2188   bounds_check(cp, index, CHECK_(0.0f));
2189   constantTag tag = cp->tag_at(index);
2190   if (!tag.is_float()) {
2191     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2192   }
2193   return cp->float_at(index);
2194 }
2195 JVM_END
2196 
2197 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2198 {
2199   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2200   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2201   bounds_check(cp, index, CHECK_(0.0));
2202   constantTag tag = cp->tag_at(index);
2203   if (!tag.is_double()) {
2204     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2205   }
2206   return cp->double_at(index);
2207 }
2208 JVM_END
2209 
2210 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2211 {
2212   JVMWrapper("JVM_ConstantPoolGetStringAt");
2213   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2214   bounds_check(cp, index, CHECK_NULL);
2215   constantTag tag = cp->tag_at(index);
2216   if (!tag.is_string()) {
2217     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2218   }
2219   oop str = cp->string_at(index, CHECK_NULL);
2220   return (jstring) JNIHandles::make_local(str);
2221 }
2222 JVM_END
2223 
2224 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2225 {
2226   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2227   JvmtiVMObjectAllocEventCollector oam;
2228   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2229   bounds_check(cp, index, CHECK_NULL);
2230   constantTag tag = cp->tag_at(index);
2231   if (!tag.is_symbol()) {
2232     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2233   }
2234   Symbol* sym = cp->symbol_at(index);
2235   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2236   return (jstring) JNIHandles::make_local(str());
2237 }
2238 JVM_END
2239 
2240 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2241 {
2242   JVMWrapper("JVM_ConstantPoolGetTagAt");
2243   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2244   bounds_check(cp, index, CHECK_0);
2245   constantTag tag = cp->tag_at(index);
2246   jbyte result = tag.value();
2247   // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2248   // they are changed to the corresponding tags from the JVM spec, so that java code in
2249   // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2250   if (tag.is_klass_or_reference()) {
2251       result = JVM_CONSTANT_Class;
2252   } else if (tag.is_string_index()) {
2253       result = JVM_CONSTANT_String;
2254   } else if (tag.is_method_type_in_error()) {
2255       result = JVM_CONSTANT_MethodType;
2256   } else if (tag.is_method_handle_in_error()) {
2257       result = JVM_CONSTANT_MethodHandle;
2258   } else if (tag.is_dynamic_constant_in_error()) {
2259       result = JVM_CONSTANT_Dynamic;
2260   }
2261   return result;
2262 }
2263 JVM_END
2264 
2265 // Assertion support. //////////////////////////////////////////////////////////
2266 
2267 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2268   JVMWrapper("JVM_DesiredAssertionStatus");
2269   assert(cls != NULL, "bad class");
2270 
2271   oop r = JNIHandles::resolve(cls);
2272   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2273   if (java_lang_Class::is_primitive(r)) return false;
2274 
2275   Klass* k = java_lang_Class::as_Klass(r);
2276   assert(k->is_instance_klass(), "must be an instance klass");
2277   if (!k->is_instance_klass()) return false;
2278 
2279   ResourceMark rm(THREAD);
2280   const char* name = k->name()->as_C_string();
2281   bool system_class = k->class_loader() == NULL;
2282   return JavaAssertions::enabled(name, system_class);
2283 
2284 JVM_END
2285 
2286 
2287 // Return a new AssertionStatusDirectives object with the fields filled in with
2288 // command-line assertion arguments (i.e., -ea, -da).
2289 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2290   JVMWrapper("JVM_AssertionStatusDirectives");
2291   JvmtiVMObjectAllocEventCollector oam;
2292   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2293   return JNIHandles::make_local(env, asd);
2294 JVM_END
2295 
2296 // Verification ////////////////////////////////////////////////////////////////////////////////
2297 
2298 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2299 
2300 // RedefineClasses support: bug 6214132 caused verification to fail.
2301 // All functions from this section should call the jvmtiThreadSate function:
2302 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2303 // The function returns a Klass* of the _scratch_class if the verifier
2304 // was invoked in the middle of the class redefinition.
2305 // Otherwise it returns its argument value which is the _the_class Klass*.
2306 // Please, refer to the description in the jvmtiThreadSate.hpp.
2307 
2308 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2309   JVMWrapper("JVM_GetClassNameUTF");
2310   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2311   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2312   return k->name()->as_utf8();
2313 JVM_END
2314 
2315 
2316 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2317   JVMWrapper("JVM_GetClassCPTypes");
2318   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2319   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320   // types will have length zero if this is not an InstanceKlass
2321   // (length is determined by call to JVM_GetClassCPEntriesCount)
2322   if (k->is_instance_klass()) {
2323     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2324     for (int index = cp->length() - 1; index >= 0; index--) {
2325       constantTag tag = cp->tag_at(index);
2326       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2327     }
2328   }
2329 JVM_END
2330 
2331 
2332 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2333   JVMWrapper("JVM_GetClassCPEntriesCount");
2334   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2335   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2336   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2337 JVM_END
2338 
2339 
2340 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2341   JVMWrapper("JVM_GetClassFieldsCount");
2342   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2343   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2344   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2345 JVM_END
2346 
2347 
2348 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2349   JVMWrapper("JVM_GetClassMethodsCount");
2350   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2353 JVM_END
2354 
2355 
2356 // The following methods, used for the verifier, are never called with
2357 // array klasses, so a direct cast to InstanceKlass is safe.
2358 // Typically, these methods are called in a loop with bounds determined
2359 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2360 // zero for arrays.
2361 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2362   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2363   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2364   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2365   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2366   int length = method->checked_exceptions_length();
2367   if (length > 0) {
2368     CheckedExceptionElement* table= method->checked_exceptions_start();
2369     for (int i = 0; i < length; i++) {
2370       exceptions[i] = table[i].class_cp_index;
2371     }
2372   }
2373 JVM_END
2374 
2375 
2376 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2377   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2378   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2379   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2380   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2381   return method->checked_exceptions_length();
2382 JVM_END
2383 
2384 
2385 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2386   JVMWrapper("JVM_GetMethodIxByteCode");
2387   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2388   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2389   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2390   memcpy(code, method->code_base(), method->code_size());
2391 JVM_END
2392 
2393 
2394 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2395   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2396   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399   return method->code_size();
2400 JVM_END
2401 
2402 
2403 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2404   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2405   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2406   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2407   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2408   ExceptionTable extable(method);
2409   entry->start_pc   = extable.start_pc(entry_index);
2410   entry->end_pc     = extable.end_pc(entry_index);
2411   entry->handler_pc = extable.handler_pc(entry_index);
2412   entry->catchType  = extable.catch_type_index(entry_index);
2413 JVM_END
2414 
2415 
2416 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2417   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2418   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2419   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2420   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2421   return method->exception_table_length();
2422 JVM_END
2423 
2424 
2425 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2426   JVMWrapper("JVM_GetMethodIxModifiers");
2427   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2428   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2430   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2431 JVM_END
2432 
2433 
2434 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2435   JVMWrapper("JVM_GetFieldIxModifiers");
2436   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2437   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2438   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2439 JVM_END
2440 
2441 
2442 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2443   JVMWrapper("JVM_GetMethodIxLocalsCount");
2444   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2445   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2446   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2447   return method->max_locals();
2448 JVM_END
2449 
2450 
2451 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2452   JVMWrapper("JVM_GetMethodIxArgsSize");
2453   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2456   return method->size_of_parameters();
2457 JVM_END
2458 
2459 
2460 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2461   JVMWrapper("JVM_GetMethodIxMaxStack");
2462   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2463   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2464   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2465   return method->verifier_max_stack();
2466 JVM_END
2467 
2468 
2469 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2470   JVMWrapper("JVM_IsConstructorIx");
2471   ResourceMark rm(THREAD);
2472   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2473   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2474   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2475   return method->name() == vmSymbols::object_initializer_name();
2476 JVM_END
2477 
2478 
2479 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2480   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2481   ResourceMark rm(THREAD);
2482   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2483   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2484   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2485   return method->is_overpass();
2486 JVM_END
2487 
2488 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2489   JVMWrapper("JVM_GetMethodIxIxUTF");
2490   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2491   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2492   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2493   return method->name()->as_utf8();
2494 JVM_END
2495 
2496 
2497 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2498   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2499   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2500   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2501   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2502   return method->signature()->as_utf8();
2503 JVM_END
2504 
2505 /**
2506  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2507  * read entries in the constant pool.  Since the old verifier always
2508  * works on a copy of the code, it will not see any rewriting that
2509  * may possibly occur in the middle of verification.  So it is important
2510  * that nothing it calls tries to use the cpCache instead of the raw
2511  * constant pool, so we must use cp->uncached_x methods when appropriate.
2512  */
2513 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2514   JVMWrapper("JVM_GetCPFieldNameUTF");
2515   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2516   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2517   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2518   switch (cp->tag_at(cp_index).value()) {
2519     case JVM_CONSTANT_Fieldref:
2520       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2521     default:
2522       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2523   }
2524   ShouldNotReachHere();
2525   return NULL;
2526 JVM_END
2527 
2528 
2529 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2530   JVMWrapper("JVM_GetCPMethodNameUTF");
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_InterfaceMethodref:
2536     case JVM_CONSTANT_Methodref:
2537       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2538     default:
2539       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2540   }
2541   ShouldNotReachHere();
2542   return NULL;
2543 JVM_END
2544 
2545 
2546 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2547   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2548   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2549   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2550   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2551   switch (cp->tag_at(cp_index).value()) {
2552     case JVM_CONSTANT_InterfaceMethodref:
2553     case JVM_CONSTANT_Methodref:
2554       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2555     default:
2556       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2557   }
2558   ShouldNotReachHere();
2559   return NULL;
2560 JVM_END
2561 
2562 
2563 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2564   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2565   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2566   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2567   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2568   switch (cp->tag_at(cp_index).value()) {
2569     case JVM_CONSTANT_Fieldref:
2570       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2571     default:
2572       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2573   }
2574   ShouldNotReachHere();
2575   return NULL;
2576 JVM_END
2577 
2578 
2579 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2580   JVMWrapper("JVM_GetCPClassNameUTF");
2581   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2582   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2583   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2584   Symbol* classname = cp->klass_name_at(cp_index);
2585   return classname->as_utf8();
2586 JVM_END
2587 
2588 
2589 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2590   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2591   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2592   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2593   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2594   switch (cp->tag_at(cp_index).value()) {
2595     case JVM_CONSTANT_Fieldref: {
2596       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2597       Symbol* classname = cp->klass_name_at(class_index);
2598       return classname->as_utf8();
2599     }
2600     default:
2601       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2602   }
2603   ShouldNotReachHere();
2604   return NULL;
2605 JVM_END
2606 
2607 
2608 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2609   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2610   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2611   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2612   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2613   switch (cp->tag_at(cp_index).value()) {
2614     case JVM_CONSTANT_Methodref:
2615     case JVM_CONSTANT_InterfaceMethodref: {
2616       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2617       Symbol* classname = cp->klass_name_at(class_index);
2618       return classname->as_utf8();
2619     }
2620     default:
2621       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2622   }
2623   ShouldNotReachHere();
2624   return NULL;
2625 JVM_END
2626 
2627 
2628 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2629   JVMWrapper("JVM_GetCPFieldModifiers");
2630   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2631   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2632   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2633   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2634   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2635   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2636   switch (cp->tag_at(cp_index).value()) {
2637     case JVM_CONSTANT_Fieldref: {
2638       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2639       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2640       InstanceKlass* ik = InstanceKlass::cast(k_called);
2641       for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2642         if (fs.name() == name && fs.signature() == signature) {
2643           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2644         }
2645       }
2646       return -1;
2647     }
2648     default:
2649       fatal("JVM_GetCPFieldModifiers: illegal constant");
2650   }
2651   ShouldNotReachHere();
2652   return 0;
2653 JVM_END
2654 
2655 
2656 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2657   JVMWrapper("JVM_GetCPMethodModifiers");
2658   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2659   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2660   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2661   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2662   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2663   switch (cp->tag_at(cp_index).value()) {
2664     case JVM_CONSTANT_Methodref:
2665     case JVM_CONSTANT_InterfaceMethodref: {
2666       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2667       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2668       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2669       int methods_count = methods->length();
2670       for (int i = 0; i < methods_count; i++) {
2671         Method* method = methods->at(i);
2672         if (method->name() == name && method->signature() == signature) {
2673             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2674         }
2675       }
2676       return -1;
2677     }
2678     default:
2679       fatal("JVM_GetCPMethodModifiers: illegal constant");
2680   }
2681   ShouldNotReachHere();
2682   return 0;
2683 JVM_END
2684 
2685 
2686 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2687 
2688 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2689   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2690 JVM_END
2691 
2692 
2693 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2694   JVMWrapper("JVM_IsSameClassPackage");
2695   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2696   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2697   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2698   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2699   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2700 JVM_END
2701 
2702 // Printing support //////////////////////////////////////////////////
2703 extern "C" {
2704 
2705 ATTRIBUTE_PRINTF(3, 0)
2706 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2707   // Reject count values that are negative signed values converted to
2708   // unsigned; see bug 4399518, 4417214
2709   if ((intptr_t)count <= 0) return -1;
2710 
2711   int result = os::vsnprintf(str, count, fmt, args);
2712   if (result > 0 && (size_t)result >= count) {
2713     result = -1;
2714   }
2715 
2716   return result;
2717 }
2718 
2719 ATTRIBUTE_PRINTF(3, 4)
2720 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2721   va_list args;
2722   int len;
2723   va_start(args, fmt);
2724   len = jio_vsnprintf(str, count, fmt, args);
2725   va_end(args);
2726   return len;
2727 }
2728 
2729 ATTRIBUTE_PRINTF(2, 3)
2730 int jio_fprintf(FILE* f, const char *fmt, ...) {
2731   int len;
2732   va_list args;
2733   va_start(args, fmt);
2734   len = jio_vfprintf(f, fmt, args);
2735   va_end(args);
2736   return len;
2737 }
2738 
2739 ATTRIBUTE_PRINTF(2, 0)
2740 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2741   if (Arguments::vfprintf_hook() != NULL) {
2742      return Arguments::vfprintf_hook()(f, fmt, args);
2743   } else {
2744     return vfprintf(f, fmt, args);
2745   }
2746 }
2747 
2748 ATTRIBUTE_PRINTF(1, 2)
2749 JNIEXPORT int jio_printf(const char *fmt, ...) {
2750   int len;
2751   va_list args;
2752   va_start(args, fmt);
2753   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2754   va_end(args);
2755   return len;
2756 }
2757 
2758 // HotSpot specific jio method
2759 void jio_print(const char* s, size_t len) {
2760   // Try to make this function as atomic as possible.
2761   if (Arguments::vfprintf_hook() != NULL) {
2762     jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2763   } else {
2764     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2765     size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2766   }
2767 }
2768 
2769 } // Extern C
2770 
2771 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2772 
2773 // In most of the JVM thread support functions we need to access the
2774 // thread through a ThreadsListHandle to prevent it from exiting and
2775 // being reclaimed while we try to operate on it. The exceptions to this
2776 // rule are when operating on the current thread, or if the monitor of
2777 // the target java.lang.Thread is locked at the Java level - in both
2778 // cases the target cannot exit.
2779 
2780 static void thread_entry(JavaThread* thread, TRAPS) {
2781   HandleMark hm(THREAD);
2782   Handle obj(THREAD, thread->threadObj());
2783   JavaValue result(T_VOID);
2784   JavaCalls::call_virtual(&result,
2785                           obj,
2786                           SystemDictionary::Thread_klass(),
2787                           vmSymbols::run_method_name(),
2788                           vmSymbols::void_method_signature(),
2789                           THREAD);
2790 }
2791 
2792 
2793 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2794   JVMWrapper("JVM_StartThread");
2795   JavaThread *native_thread = NULL;
2796 
2797   // We cannot hold the Threads_lock when we throw an exception,
2798   // due to rank ordering issues. Example:  we might need to grab the
2799   // Heap_lock while we construct the exception.
2800   bool throw_illegal_thread_state = false;
2801 
2802   // We must release the Threads_lock before we can post a jvmti event
2803   // in Thread::start.
2804   {
2805     // Ensure that the C++ Thread and OSThread structures aren't freed before
2806     // we operate.
2807     MutexLocker mu(Threads_lock);
2808 
2809     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2810     // re-starting an already started thread, so we should usually find
2811     // that the JavaThread is null. However for a JNI attached thread
2812     // there is a small window between the Thread object being created
2813     // (with its JavaThread set) and the update to its threadStatus, so we
2814     // have to check for this
2815     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2816       throw_illegal_thread_state = true;
2817     } else {
2818       // We could also check the stillborn flag to see if this thread was already stopped, but
2819       // for historical reasons we let the thread detect that itself when it starts running
2820 
2821       jlong size =
2822              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2823       // Allocate the C++ Thread structure and create the native thread.  The
2824       // stack size retrieved from java is 64-bit signed, but the constructor takes
2825       // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2826       //  - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2827       //  - Avoid passing negative values which would result in really large stacks.
2828       NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2829       size_t sz = size > 0 ? (size_t) size : 0;
2830       native_thread = new JavaThread(&thread_entry, sz);
2831 
2832       // At this point it may be possible that no osthread was created for the
2833       // JavaThread due to lack of memory. Check for this situation and throw
2834       // an exception if necessary. Eventually we may want to change this so
2835       // that we only grab the lock if the thread was created successfully -
2836       // then we can also do this check and throw the exception in the
2837       // JavaThread constructor.
2838       if (native_thread->osthread() != NULL) {
2839         // Note: the current thread is not being used within "prepare".
2840         native_thread->prepare(jthread);
2841       }
2842     }
2843   }
2844 
2845   if (throw_illegal_thread_state) {
2846     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2847   }
2848 
2849   assert(native_thread != NULL, "Starting null thread?");
2850 
2851   if (native_thread->osthread() == NULL) {
2852     // No one should hold a reference to the 'native_thread'.
2853     native_thread->smr_delete();
2854     if (JvmtiExport::should_post_resource_exhausted()) {
2855       JvmtiExport::post_resource_exhausted(
2856         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2857         os::native_thread_creation_failed_msg());
2858     }
2859     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2860               os::native_thread_creation_failed_msg());
2861   }
2862 
2863   Thread::start(native_thread);
2864 
2865 JVM_END
2866 
2867 
2868 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2869 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2870 // but is thought to be reliable and simple. In the case, where the receiver is the
2871 // same thread as the sender, no VM_Operation is needed.
2872 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2873   JVMWrapper("JVM_StopThread");
2874 
2875   // A nested ThreadsListHandle will grab the Threads_lock so create
2876   // tlh before we resolve throwable.
2877   ThreadsListHandle tlh(thread);
2878   oop java_throwable = JNIHandles::resolve(throwable);
2879   if (java_throwable == NULL) {
2880     THROW(vmSymbols::java_lang_NullPointerException());
2881   }
2882   oop java_thread = NULL;
2883   JavaThread* receiver = NULL;
2884   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2885   Events::log_exception(thread,
2886                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2887                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
2888 
2889   if (is_alive) {
2890     // jthread refers to a live JavaThread.
2891     if (thread == receiver) {
2892       // Exception is getting thrown at self so no VM_Operation needed.
2893       THROW_OOP(java_throwable);
2894     } else {
2895       // Use a VM_Operation to throw the exception.
2896       Thread::send_async_exception(java_thread, java_throwable);
2897     }
2898   } else {
2899     // Either:
2900     // - target thread has not been started before being stopped, or
2901     // - target thread already terminated
2902     // We could read the threadStatus to determine which case it is
2903     // but that is overkill as it doesn't matter. We must set the
2904     // stillborn flag for the first case, and if the thread has already
2905     // exited setting this flag has no effect.
2906     java_lang_Thread::set_stillborn(java_thread);
2907   }
2908 JVM_END
2909 
2910 
2911 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2912   JVMWrapper("JVM_IsThreadAlive");
2913 
2914   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2915   return java_lang_Thread::is_alive(thread_oop);
2916 JVM_END
2917 
2918 
2919 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2920   JVMWrapper("JVM_SuspendThread");
2921 
2922   ThreadsListHandle tlh(thread);
2923   JavaThread* receiver = NULL;
2924   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2925   if (is_alive) {
2926     // jthread refers to a live JavaThread.
2927     {
2928       MutexLocker ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2929       if (receiver->is_external_suspend()) {
2930         // Don't allow nested external suspend requests. We can't return
2931         // an error from this interface so just ignore the problem.
2932         return;
2933       }
2934       if (receiver->is_exiting()) { // thread is in the process of exiting
2935         return;
2936       }
2937       receiver->set_external_suspend();
2938     }
2939 
2940     // java_suspend() will catch threads in the process of exiting
2941     // and will ignore them.
2942     receiver->java_suspend();
2943 
2944     // It would be nice to have the following assertion in all the
2945     // time, but it is possible for a racing resume request to have
2946     // resumed this thread right after we suspended it. Temporarily
2947     // enable this assertion if you are chasing a different kind of
2948     // bug.
2949     //
2950     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2951     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2952   }
2953 JVM_END
2954 
2955 
2956 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2957   JVMWrapper("JVM_ResumeThread");
2958 
2959   ThreadsListHandle tlh(thread);
2960   JavaThread* receiver = NULL;
2961   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2962   if (is_alive) {
2963     // jthread refers to a live JavaThread.
2964 
2965     // This is the original comment for this Threads_lock grab:
2966     //   We need to *always* get the threads lock here, since this operation cannot be allowed during
2967     //   a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2968     //   threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2969     //   looks at it.
2970     //
2971     // The above comment dates back to when we had both internal and
2972     // external suspend APIs that shared a common underlying mechanism.
2973     // External suspend is now entirely cooperative and doesn't share
2974     // anything with internal suspend. That said, there are some
2975     // assumptions in the VM that an external resume grabs the
2976     // Threads_lock. We can't drop the Threads_lock grab here until we
2977     // resolve the assumptions that exist elsewhere.
2978     //
2979     MutexLocker ml(Threads_lock);
2980     receiver->java_resume();
2981   }
2982 JVM_END
2983 
2984 
2985 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2986   JVMWrapper("JVM_SetThreadPriority");
2987 
2988   ThreadsListHandle tlh(thread);
2989   oop java_thread = NULL;
2990   JavaThread* receiver = NULL;
2991   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2992   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2993 
2994   if (is_alive) {
2995     // jthread refers to a live JavaThread.
2996     Thread::set_priority(receiver, (ThreadPriority)prio);
2997   }
2998   // Implied else: If the JavaThread hasn't started yet, then the
2999   // priority set in the java.lang.Thread object above will be pushed
3000   // down when it does start.
3001 JVM_END
3002 
3003 
3004 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3005   JVMWrapper("JVM_Yield");
3006   if (os::dont_yield()) return;
3007   HOTSPOT_THREAD_YIELD();
3008   os::naked_yield();
3009 JVM_END
3010 
3011 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3012   assert(event != NULL, "invariant");
3013   assert(event->should_commit(), "invariant");
3014   event->set_time(millis);
3015   event->commit();
3016 }
3017 
3018 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3019   JVMWrapper("JVM_Sleep");
3020 
3021   if (millis < 0) {
3022     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3023   }
3024 
3025   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3026     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3027   }
3028 
3029   // Save current thread state and restore it at the end of this block.
3030   // And set new thread state to SLEEPING.
3031   JavaThreadSleepState jtss(thread);
3032 
3033   HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3034   EventThreadSleep event;
3035 
3036   if (millis == 0) {
3037     os::naked_yield();
3038   } else {
3039     ThreadState old_state = thread->osthread()->get_state();
3040     thread->osthread()->set_state(SLEEPING);
3041     if (os::sleep(thread, millis) == OS_INTRPT) {
3042       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3043       // us while we were sleeping. We do not overwrite those.
3044       if (!HAS_PENDING_EXCEPTION) {
3045         if (event.should_commit()) {
3046           post_thread_sleep_event(&event, millis);
3047         }
3048         HOTSPOT_THREAD_SLEEP_END(1);
3049 
3050         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3051         // to properly restore the thread state.  That's likely wrong.
3052         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3053       }
3054     }
3055     thread->osthread()->set_state(old_state);
3056   }
3057   if (event.should_commit()) {
3058     post_thread_sleep_event(&event, millis);
3059   }
3060   HOTSPOT_THREAD_SLEEP_END(0);
3061 JVM_END
3062 
3063 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3064   JVMWrapper("JVM_CurrentThread");
3065   oop jthread = thread->threadObj();
3066   assert (thread != NULL, "no current thread!");
3067   return JNIHandles::make_local(env, jthread);
3068 JVM_END
3069 
3070 class CountStackFramesTC : public ThreadClosure {
3071   int _count;
3072   bool _suspended;
3073  public:
3074   CountStackFramesTC() : _count(0), _suspended(false) {}
3075   virtual void do_thread(Thread* thread) {
3076     JavaThread* jt = (JavaThread*)thread;
3077     if (!jt->is_external_suspend()) {
3078       // To keep same behavior we fail this operation,
3079       // even if it would work perfectly.
3080       return;
3081     }
3082     _suspended = true;
3083      // Count all java activation, i.e., number of vframes.
3084     for (vframeStream vfst(jt); !vfst.at_end(); vfst.next()) {
3085       // Native frames are not counted.
3086       if (!vfst.method()->is_native()) _count++;
3087     }
3088   }
3089   int count() { return _count; }
3090   int suspended() { return _suspended; }
3091 };
3092 
3093 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3094   JVMWrapper("JVM_CountStackFrames");
3095 
3096   ThreadsListHandle tlh(thread);
3097   JavaThread* receiver = NULL;
3098   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3099   if (is_alive) {
3100     // jthread refers to a live JavaThread.
3101     CountStackFramesTC csf;
3102     Handshake::execute(&csf, receiver);
3103     if (!csf.suspended()) {
3104       THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3105                   "this thread is not suspended");
3106     }
3107     return csf.count();
3108   }
3109   // Implied else: if JavaThread is not alive simply return a count of 0.
3110   return 0;
3111 JVM_END
3112 
3113 
3114 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3115   JVMWrapper("JVM_Interrupt");
3116 
3117   ThreadsListHandle tlh(thread);
3118   JavaThread* receiver = NULL;
3119   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3120   if (is_alive) {
3121     // jthread refers to a live JavaThread.
3122     Thread::interrupt(receiver);
3123   }
3124 JVM_END
3125 
3126 
3127 JVM_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3128   JVMWrapper("JVM_IsInterrupted");
3129 
3130   ThreadsListHandle tlh(thread);
3131   JavaThread* receiver = NULL;
3132   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3133   if (is_alive) {
3134     // jthread refers to a live JavaThread.
3135     return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3136   } else {
3137     return JNI_FALSE;
3138   }
3139 JVM_END
3140 
3141 
3142 // Return true iff the current thread has locked the object passed in
3143 
3144 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3145   JVMWrapper("JVM_HoldsLock");
3146   assert(THREAD->is_Java_thread(), "sanity check");
3147   if (obj == NULL) {
3148     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3149   }
3150   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3151   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3152 JVM_END
3153 
3154 
3155 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3156   JVMWrapper("JVM_DumpAllStacks");
3157   VM_PrintThreads op;
3158   VMThread::execute(&op);
3159   if (JvmtiExport::should_post_data_dump()) {
3160     JvmtiExport::post_data_dump();
3161   }
3162 JVM_END
3163 
3164 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3165   JVMWrapper("JVM_SetNativeThreadName");
3166 
3167   // We don't use a ThreadsListHandle here because the current thread
3168   // must be alive.
3169   oop java_thread = JNIHandles::resolve_non_null(jthread);
3170   JavaThread* thr = java_lang_Thread::thread(java_thread);
3171   if (thread == thr && !thr->has_attached_via_jni()) {
3172     // Thread naming is only supported for the current thread and
3173     // we don't set the name of an attached thread to avoid stepping
3174     // on other programs.
3175     ResourceMark rm(thread);
3176     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3177     os::set_native_thread_name(thread_name);
3178   }
3179 JVM_END
3180 
3181 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3182 
3183 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3184   JVMWrapper("JVM_GetClassContext");
3185   ResourceMark rm(THREAD);
3186   JvmtiVMObjectAllocEventCollector oam;
3187   vframeStream vfst(thread);
3188 
3189   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3190     // This must only be called from SecurityManager.getClassContext
3191     Method* m = vfst.method();
3192     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3193           m->name()          == vmSymbols::getClassContext_name() &&
3194           m->signature()     == vmSymbols::void_class_array_signature())) {
3195       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3196     }
3197   }
3198 
3199   // Collect method holders
3200   GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3201   for (; !vfst.at_end(); vfst.security_next()) {
3202     Method* m = vfst.method();
3203     // Native frames are not returned
3204     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3205       Klass* holder = m->method_holder();
3206       assert(holder->is_klass(), "just checking");
3207       klass_array->append(holder);
3208     }
3209   }
3210 
3211   // Create result array of type [Ljava/lang/Class;
3212   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3213   // Fill in mirrors corresponding to method holders
3214   for (int i = 0; i < klass_array->length(); i++) {
3215     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3216   }
3217 
3218   return (jobjectArray) JNIHandles::make_local(env, result);
3219 JVM_END
3220 
3221 
3222 // java.lang.Package ////////////////////////////////////////////////////////////////
3223 
3224 
3225 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3226   JVMWrapper("JVM_GetSystemPackage");
3227   ResourceMark rm(THREAD);
3228   JvmtiVMObjectAllocEventCollector oam;
3229   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3230   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3231   return (jstring) JNIHandles::make_local(result);
3232 JVM_END
3233 
3234 
3235 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3236   JVMWrapper("JVM_GetSystemPackages");
3237   JvmtiVMObjectAllocEventCollector oam;
3238   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3239   return (jobjectArray) JNIHandles::make_local(result);
3240 JVM_END
3241 
3242 
3243 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3244 
3245 
3246 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3247   JVMWrapper("JVM_GetAndClearReferencePendingList");
3248 
3249   MonitorLocker ml(Heap_lock);
3250   oop ref = Universe::reference_pending_list();
3251   if (ref != NULL) {
3252     Universe::set_reference_pending_list(NULL);
3253   }
3254   return JNIHandles::make_local(env, ref);
3255 JVM_END
3256 
3257 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3258   JVMWrapper("JVM_HasReferencePendingList");
3259   MonitorLocker ml(Heap_lock);
3260   return Universe::has_reference_pending_list();
3261 JVM_END
3262 
3263 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3264   JVMWrapper("JVM_WaitForReferencePendingList");
3265   MonitorLocker ml(Heap_lock);
3266   while (!Universe::has_reference_pending_list()) {
3267     ml.wait();
3268   }
3269 JVM_END
3270 
3271 
3272 // ObjectInputStream ///////////////////////////////////////////////////////////////
3273 
3274 // Return the first user-defined class loader up the execution stack, or null
3275 // if only code from the bootstrap or platform class loader is on the stack.
3276 
3277 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3278   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3279     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3280     oop loader = vfst.method()->method_holder()->class_loader();
3281     if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3282       return JNIHandles::make_local(env, loader);
3283     }
3284   }
3285   return NULL;
3286 JVM_END
3287 
3288 
3289 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3290 
3291 
3292 // resolve array handle and check arguments
3293 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3294   if (arr == NULL) {
3295     THROW_0(vmSymbols::java_lang_NullPointerException());
3296   }
3297   oop a = JNIHandles::resolve_non_null(arr);
3298   if (!a->is_array()) {
3299     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3300   } else if (type_array_only && !a->is_typeArray()) {
3301     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3302   }
3303   return arrayOop(a);
3304 }
3305 
3306 
3307 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3308   JVMWrapper("JVM_GetArrayLength");
3309   arrayOop a = check_array(env, arr, false, CHECK_0);
3310   return a->length();
3311 JVM_END
3312 
3313 
3314 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3315   JVMWrapper("JVM_Array_Get");
3316   JvmtiVMObjectAllocEventCollector oam;
3317   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3318   jvalue value;
3319   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3320   oop box = Reflection::box(&value, type, CHECK_NULL);
3321   return JNIHandles::make_local(env, box);
3322 JVM_END
3323 
3324 
3325 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3326   JVMWrapper("JVM_GetPrimitiveArrayElement");
3327   jvalue value;
3328   value.i = 0; // to initialize value before getting used in CHECK
3329   arrayOop a = check_array(env, arr, true, CHECK_(value));
3330   assert(a->is_typeArray(), "just checking");
3331   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3332   BasicType wide_type = (BasicType) wCode;
3333   if (type != wide_type) {
3334     Reflection::widen(&value, type, wide_type, CHECK_(value));
3335   }
3336   return value;
3337 JVM_END
3338 
3339 
3340 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3341   JVMWrapper("JVM_SetArrayElement");
3342   arrayOop a = check_array(env, arr, false, CHECK);
3343   oop box = JNIHandles::resolve(val);
3344   jvalue value;
3345   value.i = 0; // to initialize value before getting used in CHECK
3346   BasicType value_type;
3347   if (a->is_objArray()) {
3348     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3349     value_type = Reflection::unbox_for_regular_object(box, &value);
3350   } else {
3351     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3352   }
3353   Reflection::array_set(&value, a, index, value_type, CHECK);
3354 JVM_END
3355 
3356 
3357 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3358   JVMWrapper("JVM_SetPrimitiveArrayElement");
3359   arrayOop a = check_array(env, arr, true, CHECK);
3360   assert(a->is_typeArray(), "just checking");
3361   BasicType value_type = (BasicType) vCode;
3362   Reflection::array_set(&v, a, index, value_type, CHECK);
3363 JVM_END
3364 
3365 
3366 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3367   JVMWrapper("JVM_NewArray");
3368   JvmtiVMObjectAllocEventCollector oam;
3369   oop element_mirror = JNIHandles::resolve(eltClass);
3370   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3371   return JNIHandles::make_local(env, result);
3372 JVM_END
3373 
3374 
3375 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3376   JVMWrapper("JVM_NewMultiArray");
3377   JvmtiVMObjectAllocEventCollector oam;
3378   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3379   oop element_mirror = JNIHandles::resolve(eltClass);
3380   assert(dim_array->is_typeArray(), "just checking");
3381   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3382   return JNIHandles::make_local(env, result);
3383 JVM_END
3384 
3385 
3386 // Library support ///////////////////////////////////////////////////////////////////////////
3387 
3388 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3389   //%note jvm_ct
3390   JVMWrapper("JVM_LoadLibrary");
3391   char ebuf[1024];
3392   void *load_result;
3393   {
3394     ThreadToNativeFromVM ttnfvm(thread);
3395     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3396   }
3397   if (load_result == NULL) {
3398     char msg[1024];
3399     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3400     // Since 'ebuf' may contain a string encoded using
3401     // platform encoding scheme, we need to pass
3402     // Exceptions::unsafe_to_utf8 to the new_exception method
3403     // as the last argument. See bug 6367357.
3404     Handle h_exception =
3405       Exceptions::new_exception(thread,
3406                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3407                                 msg, Exceptions::unsafe_to_utf8);
3408 
3409     THROW_HANDLE_0(h_exception);
3410   }
3411   return load_result;
3412 JVM_END
3413 
3414 
3415 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3416   JVMWrapper("JVM_UnloadLibrary");
3417   os::dll_unload(handle);
3418 JVM_END
3419 
3420 
3421 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3422   JVMWrapper("JVM_FindLibraryEntry");
3423   return os::dll_lookup(handle, name);
3424 JVM_END
3425 
3426 
3427 // JNI version ///////////////////////////////////////////////////////////////////////////////
3428 
3429 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3430   JVMWrapper("JVM_IsSupportedJNIVersion");
3431   return Threads::is_supported_jni_version_including_1_1(version);
3432 JVM_END
3433 
3434 
3435 // String support ///////////////////////////////////////////////////////////////////////////
3436 
3437 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3438   JVMWrapper("JVM_InternString");
3439   JvmtiVMObjectAllocEventCollector oam;
3440   if (str == NULL) return NULL;
3441   oop string = JNIHandles::resolve_non_null(str);
3442   oop result = StringTable::intern(string, CHECK_NULL);
3443   return (jstring) JNIHandles::make_local(env, result);
3444 JVM_END
3445 
3446 
3447 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3448 
3449 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3450 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3451 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3452 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3453 // nature. JavaThreads will be "in native" when using this API from JDK code.
3454 
3455 
3456 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3457   VM_Exit::block_if_vm_exited();
3458   JVMWrapper("JVM_RawMonitorCreate");
3459   return new os::PlatformMutex();
3460 }
3461 
3462 
3463 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3464   VM_Exit::block_if_vm_exited();
3465   JVMWrapper("JVM_RawMonitorDestroy");
3466   delete ((os::PlatformMutex*) mon);
3467 }
3468 
3469 
3470 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3471   VM_Exit::block_if_vm_exited();
3472   JVMWrapper("JVM_RawMonitorEnter");
3473   ((os::PlatformMutex*) mon)->lock();
3474   return 0;
3475 }
3476 
3477 
3478 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3479   VM_Exit::block_if_vm_exited();
3480   JVMWrapper("JVM_RawMonitorExit");
3481   ((os::PlatformMutex*) mon)->unlock();
3482 }
3483 
3484 
3485 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3486 
3487 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, jboolean link,
3488                                     Handle loader, Handle protection_domain,
3489                                     jboolean throwError, TRAPS) {
3490   // Initialization also implies linking - check for coherent args
3491   assert((init && link) || !init, "incorrect use of init/link arguments");
3492 
3493   // Security Note:
3494   //   The Java level wrapper will perform the necessary security check allowing
3495   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
3496   //   the checkPackageAccess relative to the initiating class loader via the
3497   //   protection_domain. The protection_domain is passed as NULL by the java code
3498   //   if there is no security manager in 3-arg Class.forName().
3499   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3500 
3501   // Check if we should initialize the class (which implies linking), or just link it
3502   if (init && klass->is_instance_klass()) {
3503     klass->initialize(CHECK_NULL);
3504   } else if (link && klass->is_instance_klass()) {
3505     InstanceKlass::cast(klass)->link_class(CHECK_NULL);
3506   }
3507   return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3508 }
3509 
3510 
3511 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3512 
3513 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3514   JVMWrapper("JVM_InvokeMethod");
3515   Handle method_handle;
3516   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3517     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3518     Handle receiver(THREAD, JNIHandles::resolve(obj));
3519     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3520     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3521     jobject res = JNIHandles::make_local(env, result);
3522     if (JvmtiExport::should_post_vm_object_alloc()) {
3523       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3524       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3525       if (java_lang_Class::is_primitive(ret_type)) {
3526         // Only for primitive type vm allocates memory for java object.
3527         // See box() method.
3528         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3529       }
3530     }
3531     return res;
3532   } else {
3533     THROW_0(vmSymbols::java_lang_StackOverflowError());
3534   }
3535 JVM_END
3536 
3537 
3538 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3539   JVMWrapper("JVM_NewInstanceFromConstructor");
3540   oop constructor_mirror = JNIHandles::resolve(c);
3541   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3542   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3543   jobject res = JNIHandles::make_local(env, result);
3544   if (JvmtiExport::should_post_vm_object_alloc()) {
3545     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3546   }
3547   return res;
3548 JVM_END
3549 
3550 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3551 
3552 JVM_LEAF(jboolean, JVM_SupportsCX8())
3553   JVMWrapper("JVM_SupportsCX8");
3554   return VM_Version::supports_cx8();
3555 JVM_END
3556 
3557 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3558   JVMWrapper("JVM_InitializeFromArchive");
3559   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3560   assert(k->is_klass(), "just checking");
3561   HeapShared::initialize_from_archived_subgraph(k);
3562 JVM_END
3563 
3564 // Returns an array of all live Thread objects (VM internal JavaThreads,
3565 // jvmti agent threads, and JNI attaching threads  are skipped)
3566 // See CR 6404306 regarding JNI attaching threads
3567 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3568   ResourceMark rm(THREAD);
3569   ThreadsListEnumerator tle(THREAD, false, false);
3570   JvmtiVMObjectAllocEventCollector oam;
3571 
3572   int num_threads = tle.num_threads();
3573   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3574   objArrayHandle threads_ah(THREAD, r);
3575 
3576   for (int i = 0; i < num_threads; i++) {
3577     Handle h = tle.get_threadObj(i);
3578     threads_ah->obj_at_put(i, h());
3579   }
3580 
3581   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3582 JVM_END
3583 
3584 
3585 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3586 // Return StackTraceElement[][], each element is the stack trace of a thread in
3587 // the corresponding entry in the given threads array
3588 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3589   JVMWrapper("JVM_DumpThreads");
3590   JvmtiVMObjectAllocEventCollector oam;
3591 
3592   // Check if threads is null
3593   if (threads == NULL) {
3594     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3595   }
3596 
3597   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3598   objArrayHandle ah(THREAD, a);
3599   int num_threads = ah->length();
3600   // check if threads is non-empty array
3601   if (num_threads == 0) {
3602     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3603   }
3604 
3605   // check if threads is not an array of objects of Thread class
3606   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3607   if (k != SystemDictionary::Thread_klass()) {
3608     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3609   }
3610 
3611   ResourceMark rm(THREAD);
3612 
3613   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3614   for (int i = 0; i < num_threads; i++) {
3615     oop thread_obj = ah->obj_at(i);
3616     instanceHandle h(THREAD, (instanceOop) thread_obj);
3617     thread_handle_array->append(h);
3618   }
3619 
3620   // The JavaThread references in thread_handle_array are validated
3621   // in VM_ThreadDump::doit().
3622   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3623   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3624 
3625 JVM_END
3626 
3627 // JVM monitoring and management support
3628 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3629   return Management::get_jmm_interface(version);
3630 JVM_END
3631 
3632 // com.sun.tools.attach.VirtualMachine agent properties support
3633 //
3634 // Initialize the agent properties with the properties maintained in the VM
3635 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3636   JVMWrapper("JVM_InitAgentProperties");
3637   ResourceMark rm;
3638 
3639   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3640 
3641   PUTPROP(props, "sun.java.command", Arguments::java_command());
3642   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3643   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3644   return properties;
3645 JVM_END
3646 
3647 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3648 {
3649   JVMWrapper("JVM_GetEnclosingMethodInfo");
3650   JvmtiVMObjectAllocEventCollector oam;
3651 
3652   if (ofClass == NULL) {
3653     return NULL;
3654   }
3655   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3656   // Special handling for primitive objects
3657   if (java_lang_Class::is_primitive(mirror())) {
3658     return NULL;
3659   }
3660   Klass* k = java_lang_Class::as_Klass(mirror());
3661   if (!k->is_instance_klass()) {
3662     return NULL;
3663   }
3664   InstanceKlass* ik = InstanceKlass::cast(k);
3665   int encl_method_class_idx = ik->enclosing_method_class_index();
3666   if (encl_method_class_idx == 0) {
3667     return NULL;
3668   }
3669   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3670   objArrayHandle dest(THREAD, dest_o);
3671   Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3672   dest->obj_at_put(0, enc_k->java_mirror());
3673   int encl_method_method_idx = ik->enclosing_method_method_index();
3674   if (encl_method_method_idx != 0) {
3675     Symbol* sym = ik->constants()->symbol_at(
3676                         extract_low_short_from_int(
3677                           ik->constants()->name_and_type_at(encl_method_method_idx)));
3678     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3679     dest->obj_at_put(1, str());
3680     sym = ik->constants()->symbol_at(
3681               extract_high_short_from_int(
3682                 ik->constants()->name_and_type_at(encl_method_method_idx)));
3683     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3684     dest->obj_at_put(2, str());
3685   }
3686   return (jobjectArray) JNIHandles::make_local(dest());
3687 }
3688 JVM_END
3689 
3690 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3691 {
3692   memset(info, 0, info_size);
3693 
3694   info->jvm_version = VM_Version::jvm_version();
3695   info->patch_version = VM_Version::vm_patch_version();
3696 
3697   // when we add a new capability in the jvm_version_info struct, we should also
3698   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3699   // counter defined in runtimeService.cpp.
3700   info->is_attach_supported = AttachListener::is_attach_supported();
3701 }
3702 JVM_END
3703 
3704 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3705 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3706   ResourceMark rm(THREAD);
3707 
3708   if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3709     return NULL;
3710   }
3711 
3712   char** vm_flags = Arguments::jvm_flags_array();
3713   char** vm_args = Arguments::jvm_args_array();
3714   int num_flags = Arguments::num_jvm_flags();
3715   int num_args = Arguments::num_jvm_args();
3716 
3717   InstanceKlass* ik = SystemDictionary::String_klass();
3718   objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3719   objArrayHandle result_h(THREAD, r);
3720 
3721   int index = 0;
3722   for (int j = 0; j < num_flags; j++, index++) {
3723     Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3724     result_h->obj_at_put(index, h());
3725   }
3726   for (int i = 0; i < num_args; i++, index++) {
3727     Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3728     result_h->obj_at_put(index, h());
3729   }
3730   return (jobjectArray) JNIHandles::make_local(env, result_h());
3731 JVM_END
3732 
3733 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3734   return os::get_signal_number(name);
3735 JVM_END