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.inline.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 (Atomic::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 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
 544   if (!ShowCodeDetailsInExceptionMessages) return NULL;
 545 
 546   oop exc = JNIHandles::resolve_non_null(throwable);
 547 
 548   Method* method;
 549   int bci;
 550   if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
 551     return NULL;
 552   }
 553   if (method->is_native()) {
 554     return NULL;
 555   }
 556 
 557   stringStream ss;
 558   bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
 559   if (ok) {
 560     oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_0);
 561     return (jstring) JNIHandles::make_local(env, result);
 562   } else {
 563     return NULL;
 564   }
 565 JVM_END
 566 
 567 // java.lang.StackTraceElement //////////////////////////////////////////////
 568 
 569 
 570 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
 571   JVMWrapper("JVM_InitStackTraceElementArray");
 572   Handle exception(THREAD, JNIHandles::resolve(throwable));
 573   objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
 574   objArrayHandle stack_trace(THREAD, st);
 575   // Fill in the allocated stack trace
 576   java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
 577 JVM_END
 578 
 579 
 580 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
 581   JVMWrapper("JVM_InitStackTraceElement");
 582   Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
 583   Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
 584   java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
 585 JVM_END
 586 
 587 
 588 // java.lang.StackWalker //////////////////////////////////////////////////////
 589 
 590 
 591 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
 592                                      jint skip_frames, jint frame_count, jint start_index,
 593                                      jobjectArray frames))
 594   JVMWrapper("JVM_CallStackWalk");
 595   JavaThread* jt = (JavaThread*) THREAD;
 596   if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
 597     THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
 598   }
 599 
 600   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 601 
 602   // frames array is a Class<?>[] array when only getting caller reference,
 603   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 604   // be null.
 605   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 606   objArrayHandle frames_array_h(THREAD, fa);
 607 
 608   int limit = start_index + frame_count;
 609   if (frames_array_h->length() < limit) {
 610     THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
 611   }
 612 
 613   oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
 614                                start_index, frames_array_h, CHECK_NULL);
 615   return JNIHandles::make_local(env, result);
 616 JVM_END
 617 
 618 
 619 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
 620                                   jint frame_count, jint start_index,
 621                                   jobjectArray frames))
 622   JVMWrapper("JVM_MoreStackWalk");
 623   JavaThread* jt = (JavaThread*) THREAD;
 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_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
 634   }
 635 
 636   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 637   return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
 638                                    start_index, frames_array_h, THREAD);
 639 JVM_END
 640 
 641 // java.lang.Object ///////////////////////////////////////////////
 642 
 643 
 644 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 645   JVMWrapper("JVM_IHashCode");
 646   // as implemented in the classic virtual machine; return 0 if object is NULL
 647   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 648 JVM_END
 649 
 650 
 651 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 652   JVMWrapper("JVM_MonitorWait");
 653   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 654   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 655   if (JvmtiExport::should_post_monitor_wait()) {
 656     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 657 
 658     // The current thread already owns the monitor and it has not yet
 659     // been added to the wait queue so the current thread cannot be
 660     // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
 661     // event handler cannot accidentally consume an unpark() meant for
 662     // the ParkEvent associated with this ObjectMonitor.
 663   }
 664   ObjectSynchronizer::wait(obj, ms, CHECK);
 665 JVM_END
 666 
 667 
 668 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 669   JVMWrapper("JVM_MonitorNotify");
 670   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 671   ObjectSynchronizer::notify(obj, CHECK);
 672 JVM_END
 673 
 674 
 675 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 676   JVMWrapper("JVM_MonitorNotifyAll");
 677   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 678   ObjectSynchronizer::notifyall(obj, CHECK);
 679 JVM_END
 680 
 681 
 682 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 683   JVMWrapper("JVM_Clone");
 684   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 685   Klass* klass = obj->klass();
 686   JvmtiVMObjectAllocEventCollector oam;
 687 
 688 #ifdef ASSERT
 689   // Just checking that the cloneable flag is set correct
 690   if (obj->is_array()) {
 691     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 692   } else {
 693     guarantee(obj->is_instance(), "should be instanceOop");
 694     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 695     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 696   }
 697 #endif
 698 
 699   // Check if class of obj supports the Cloneable interface.
 700   // All arrays are considered to be cloneable (See JLS 20.1.5).
 701   // All j.l.r.Reference classes are considered non-cloneable.
 702   if (!klass->is_cloneable() ||
 703       (klass->is_instance_klass() &&
 704        InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
 705     ResourceMark rm(THREAD);
 706     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 707   }
 708 
 709   // Make shallow object copy
 710   const int size = obj->size();
 711   oop new_obj_oop = NULL;
 712   if (obj->is_array()) {
 713     const int length = ((arrayOop)obj())->length();
 714     new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
 715                                                    /* do_zero */ true, CHECK_NULL);
 716   } else {
 717     new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
 718   }
 719 
 720   HeapAccess<>::clone(obj(), new_obj_oop, size);
 721 
 722   Handle new_obj(THREAD, new_obj_oop);
 723   // Caution: this involves a java upcall, so the clone should be
 724   // "gc-robust" by this stage.
 725   if (klass->has_finalizer()) {
 726     assert(obj->is_instance(), "should be instanceOop");
 727     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
 728     new_obj = Handle(THREAD, new_obj_oop);
 729   }
 730 
 731   return JNIHandles::make_local(env, new_obj());
 732 JVM_END
 733 
 734 // java.io.File ///////////////////////////////////////////////////////////////
 735 
 736 JVM_LEAF(char*, JVM_NativePath(char* path))
 737   JVMWrapper("JVM_NativePath");
 738   return os::native_path(path);
 739 JVM_END
 740 
 741 
 742 // Misc. class handling ///////////////////////////////////////////////////////////
 743 
 744 
 745 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
 746   JVMWrapper("JVM_GetCallerClass");
 747 
 748   // Getting the class of the caller frame.
 749   //
 750   // The call stack at this point looks something like this:
 751   //
 752   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 753   // [1] [ @CallerSensitive API.method                                   ]
 754   // [.] [ (skipped intermediate frames)                                 ]
 755   // [n] [ caller                                                        ]
 756   vframeStream vfst(thread);
 757   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 758   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 759     Method* m = vfst.method();
 760     assert(m != NULL, "sanity");
 761     switch (n) {
 762     case 0:
 763       // This must only be called from Reflection.getCallerClass
 764       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 765         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 766       }
 767       // fall-through
 768     case 1:
 769       // Frame 0 and 1 must be caller sensitive.
 770       if (!m->caller_sensitive()) {
 771         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 772       }
 773       break;
 774     default:
 775       if (!m->is_ignored_by_security_stack_walk()) {
 776         // We have reached the desired frame; return the holder class.
 777         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 778       }
 779       break;
 780     }
 781   }
 782   return NULL;
 783 JVM_END
 784 
 785 
 786 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 787   JVMWrapper("JVM_FindPrimitiveClass");
 788   oop mirror = NULL;
 789   BasicType t = name2type(utf);
 790   if (t != T_ILLEGAL && !is_reference_type(t)) {
 791     mirror = Universe::java_mirror(t);
 792   }
 793   if (mirror == NULL) {
 794     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 795   } else {
 796     return (jclass) JNIHandles::make_local(env, mirror);
 797   }
 798 JVM_END
 799 
 800 
 801 // Returns a class loaded by the bootstrap class loader; or null
 802 // if not found.  ClassNotFoundException is not thrown.
 803 // FindClassFromBootLoader is exported to the launcher for windows.
 804 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 805                                               const char* name))
 806   JVMWrapper("JVM_FindClassFromBootLoader");
 807 
 808   // Java libraries should ensure that name is never null...
 809   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 810     // It's impossible to create this class;  the name cannot fit
 811     // into the constant pool.
 812     return NULL;
 813   }
 814 
 815   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 816   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 817   if (k == NULL) {
 818     return NULL;
 819   }
 820 
 821   if (log_is_enabled(Debug, class, resolve)) {
 822     trace_class_resolution(k);
 823   }
 824   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 825 JVM_END
 826 
 827 // Find a class with this name in this loader, using the caller's protection domain.
 828 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
 829                                           jboolean init, jobject loader,
 830                                           jclass caller))
 831   JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
 832   // Java libraries should ensure that name is never null...
 833   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 834     // It's impossible to create this class;  the name cannot fit
 835     // into the constant pool.
 836     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 837   }
 838 
 839   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 840 
 841   oop loader_oop = JNIHandles::resolve(loader);
 842   oop from_class = JNIHandles::resolve(caller);
 843   oop protection_domain = NULL;
 844   // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
 845   // NPE. Put it in another way, the bootstrap class loader has all permission and
 846   // thus no checkPackageAccess equivalence in the VM class loader.
 847   // The caller is also passed as NULL by the java code if there is no security
 848   // manager to avoid the performance cost of getting the calling class.
 849   if (from_class != NULL && loader_oop != NULL) {
 850     protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
 851   }
 852 
 853   Handle h_loader(THREAD, loader_oop);
 854   Handle h_prot(THREAD, protection_domain);
 855   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 856                                                h_prot, false, THREAD);
 857 
 858   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 859     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 860   }
 861   return result;
 862 JVM_END
 863 
 864 // Currently only called from the old verifier.
 865 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 866                                          jboolean init, jclass from))
 867   JVMWrapper("JVM_FindClassFromClass");
 868   if (name == NULL) {
 869     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 870   }
 871   if ((int)strlen(name) > Symbol::max_length()) {
 872     // It's impossible to create this class;  the name cannot fit
 873     // into the constant pool.
 874     Exceptions::fthrow(THREAD_AND_LOCATION,
 875                        vmSymbols::java_lang_NoClassDefFoundError(),
 876                        "Class name exceeds maximum length of %d: %s",
 877                        Symbol::max_length(),
 878                        name);
 879     return 0;
 880   }
 881   TempNewSymbol h_name = SymbolTable::new_symbol(name);
 882   oop from_class_oop = JNIHandles::resolve(from);
 883   Klass* from_class = (from_class_oop == NULL)
 884                            ? (Klass*)NULL
 885                            : java_lang_Class::as_Klass(from_class_oop);
 886   oop class_loader = NULL;
 887   oop protection_domain = NULL;
 888   if (from_class != NULL) {
 889     class_loader = from_class->class_loader();
 890     protection_domain = from_class->protection_domain();
 891   }
 892   Handle h_loader(THREAD, class_loader);
 893   Handle h_prot  (THREAD, protection_domain);
 894   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 895                                                h_prot, true, thread);
 896 
 897   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 898     // this function is generally only used for class loading during verification.
 899     ResourceMark rm;
 900     oop from_mirror = JNIHandles::resolve_non_null(from);
 901     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 902     const char * from_name = from_class->external_name();
 903 
 904     oop mirror = JNIHandles::resolve_non_null(result);
 905     Klass* to_class = java_lang_Class::as_Klass(mirror);
 906     const char * to = to_class->external_name();
 907     log_debug(class, resolve)("%s %s (verification)", from_name, to);
 908   }
 909 
 910   return result;
 911 JVM_END
 912 
 913 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 914   if (loader.is_null()) {
 915     return;
 916   }
 917 
 918   // check whether the current caller thread holds the lock or not.
 919   // If not, increment the corresponding counter
 920   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 921       ObjectSynchronizer::owner_self) {
 922     counter->inc();
 923   }
 924 }
 925 
 926 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 927 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 928                                       jobject loader, const jbyte *buf,
 929                                       jsize len, jobject pd, const char *source,
 930                                       TRAPS) {
 931   if (source == NULL)  source = "__JVM_DefineClass__";
 932 
 933   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 934   JavaThread* jt = (JavaThread*) THREAD;
 935 
 936   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 937                              ClassLoader::perf_define_appclass_selftime(),
 938                              ClassLoader::perf_define_appclasses(),
 939                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 940                              jt->get_thread_stat()->perf_timers_addr(),
 941                              PerfClassTraceTime::DEFINE_CLASS);
 942 
 943   if (UsePerfData) {
 944     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 945   }
 946 
 947   // Since exceptions can be thrown, class initialization can take place
 948   // if name is NULL no check for class name in .class stream has to be made.
 949   TempNewSymbol class_name = NULL;
 950   if (name != NULL) {
 951     const int str_len = (int)strlen(name);
 952     if (str_len > Symbol::max_length()) {
 953       // It's impossible to create this class;  the name cannot fit
 954       // into the constant pool.
 955       Exceptions::fthrow(THREAD_AND_LOCATION,
 956                          vmSymbols::java_lang_NoClassDefFoundError(),
 957                          "Class name exceeds maximum length of %d: %s",
 958                          Symbol::max_length(),
 959                          name);
 960       return 0;
 961     }
 962     class_name = SymbolTable::new_symbol(name, str_len);
 963   }
 964 
 965   ResourceMark rm(THREAD);
 966   ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
 967   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 968   if (UsePerfData) {
 969     is_lock_held_by_thread(class_loader,
 970                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
 971                            THREAD);
 972   }
 973   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 974   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 975                                                    class_loader,
 976                                                    protection_domain,
 977                                                    &st,
 978                                                    CHECK_NULL);
 979 
 980   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 981     trace_class_resolution(k);
 982   }
 983 
 984   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 985 }
 986 
 987 
 988 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
 989   JVMWrapper("JVM_DefineClass");
 990 
 991   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
 992 JVM_END
 993 
 994 
 995 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
 996   JVMWrapper("JVM_DefineClassWithSource");
 997 
 998   return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
 999 JVM_END
1000 
1001 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1002   JVMWrapper("JVM_FindLoadedClass");
1003   ResourceMark rm(THREAD);
1004 
1005   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1006   char* str = java_lang_String::as_utf8_string(h_name());
1007 
1008   // Sanity check, don't expect null
1009   if (str == NULL) return NULL;
1010 
1011   // Internalize the string, converting '.' to '/' in string.
1012   char* p = (char*)str;
1013   while (*p != '\0') {
1014       if (*p == '.') {
1015           *p = '/';
1016       }
1017       p++;
1018   }
1019 
1020   const int str_len = (int)(p - str);
1021   if (str_len > Symbol::max_length()) {
1022     // It's impossible to create this class;  the name cannot fit
1023     // into the constant pool.
1024     return NULL;
1025   }
1026   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1027 
1028   // Security Note:
1029   //   The Java level wrapper will perform the necessary security check allowing
1030   //   us to pass the NULL as the initiating class loader.
1031   Handle h_loader(THREAD, JNIHandles::resolve(loader));
1032   if (UsePerfData) {
1033     is_lock_held_by_thread(h_loader,
1034                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1035                            THREAD);
1036   }
1037 
1038   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1039                                                               h_loader,
1040                                                               Handle(),
1041                                                               CHECK_NULL);
1042 #if INCLUDE_CDS
1043   if (k == NULL) {
1044     // If the class is not already loaded, try to see if it's in the shared
1045     // archive for the current classloader (h_loader).
1046     k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1047   }
1048 #endif
1049   return (k == NULL) ? NULL :
1050             (jclass) JNIHandles::make_local(env, k->java_mirror());
1051 JVM_END
1052 
1053 // Module support //////////////////////////////////////////////////////////////////////////////
1054 
1055 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1056                                  jstring location, const char* const* packages, jsize num_packages))
1057   JVMWrapper("JVM_DefineModule");
1058   Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1059 JVM_END
1060 
1061 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1062   JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1063   Modules::set_bootloader_unnamed_module(module, CHECK);
1064 JVM_END
1065 
1066 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1067   JVMWrapper("JVM_AddModuleExports");
1068   Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1069 JVM_END
1070 
1071 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1072   JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1073   Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1074 JVM_END
1075 
1076 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1077   JVMWrapper("JVM_AddModuleExportsToAll");
1078   Modules::add_module_exports(from_module, package, NULL, CHECK);
1079 JVM_END
1080 
1081 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1082   JVMWrapper("JVM_AddReadsModule");
1083   Modules::add_reads_module(from_module, source_module, CHECK);
1084 JVM_END
1085 
1086 // Reflection support //////////////////////////////////////////////////////////////////////////////
1087 
1088 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1089   assert (cls != NULL, "illegal class");
1090   JVMWrapper("JVM_InitClassName");
1091   JvmtiVMObjectAllocEventCollector oam;
1092   ResourceMark rm(THREAD);
1093   HandleMark hm(THREAD);
1094   Handle java_class(THREAD, JNIHandles::resolve(cls));
1095   oop result = java_lang_Class::name(java_class, CHECK_NULL);
1096   return (jstring) JNIHandles::make_local(env, result);
1097 JVM_END
1098 
1099 
1100 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1101   JVMWrapper("JVM_GetClassInterfaces");
1102   JvmtiVMObjectAllocEventCollector oam;
1103   oop mirror = JNIHandles::resolve_non_null(cls);
1104 
1105   // Special handling for primitive objects
1106   if (java_lang_Class::is_primitive(mirror)) {
1107     // Primitive objects does not have any interfaces
1108     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1109     return (jobjectArray) JNIHandles::make_local(env, r);
1110   }
1111 
1112   Klass* klass = java_lang_Class::as_Klass(mirror);
1113   // Figure size of result array
1114   int size;
1115   if (klass->is_instance_klass()) {
1116     size = InstanceKlass::cast(klass)->local_interfaces()->length();
1117   } else {
1118     assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1119     size = 2;
1120   }
1121 
1122   // Allocate result array
1123   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1124   objArrayHandle result (THREAD, r);
1125   // Fill in result
1126   if (klass->is_instance_klass()) {
1127     // Regular instance klass, fill in all local interfaces
1128     for (int index = 0; index < size; index++) {
1129       Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1130       result->obj_at_put(index, k->java_mirror());
1131     }
1132   } else {
1133     // All arrays implement java.lang.Cloneable and java.io.Serializable
1134     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1135     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1136   }
1137   return (jobjectArray) JNIHandles::make_local(env, result());
1138 JVM_END
1139 
1140 
1141 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1142   JVMWrapper("JVM_IsInterface");
1143   oop mirror = JNIHandles::resolve_non_null(cls);
1144   if (java_lang_Class::is_primitive(mirror)) {
1145     return JNI_FALSE;
1146   }
1147   Klass* k = java_lang_Class::as_Klass(mirror);
1148   jboolean result = k->is_interface();
1149   assert(!result || k->is_instance_klass(),
1150          "all interfaces are instance types");
1151   // The compiler intrinsic for isInterface tests the
1152   // Klass::_access_flags bits in the same way.
1153   return result;
1154 JVM_END
1155 
1156 
1157 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1158   JVMWrapper("JVM_GetClassSigners");
1159   JvmtiVMObjectAllocEventCollector oam;
1160   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1161     // There are no signers for primitive types
1162     return NULL;
1163   }
1164 
1165   objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1166 
1167   // If there are no signers set in the class, or if the class
1168   // is an array, return NULL.
1169   if (signers == NULL) return NULL;
1170 
1171   // copy of the signers array
1172   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1173   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1174   for (int index = 0; index < signers->length(); index++) {
1175     signers_copy->obj_at_put(index, signers->obj_at(index));
1176   }
1177 
1178   // return the copy
1179   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1180 JVM_END
1181 
1182 
1183 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1184   JVMWrapper("JVM_SetClassSigners");
1185   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1186     // This call is ignored for primitive types and arrays.
1187     // Signers are only set once, ClassLoader.java, and thus shouldn't
1188     // be called with an array.  Only the bootstrap loader creates arrays.
1189     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1190     if (k->is_instance_klass()) {
1191       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1192     }
1193   }
1194 JVM_END
1195 
1196 
1197 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1198   JVMWrapper("JVM_GetProtectionDomain");
1199   if (JNIHandles::resolve(cls) == NULL) {
1200     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1201   }
1202 
1203   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1204     // Primitive types does not have a protection domain.
1205     return NULL;
1206   }
1207 
1208   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1209   return (jobject) JNIHandles::make_local(env, pd);
1210 JVM_END
1211 
1212 
1213 // Returns the inherited_access_control_context field of the running thread.
1214 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1215   JVMWrapper("JVM_GetInheritedAccessControlContext");
1216   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1217   return JNIHandles::make_local(env, result);
1218 JVM_END
1219 
1220 class RegisterArrayForGC {
1221  private:
1222   JavaThread *_thread;
1223  public:
1224   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1225     _thread = thread;
1226     _thread->register_array_for_gc(array);
1227   }
1228 
1229   ~RegisterArrayForGC() {
1230     _thread->register_array_for_gc(NULL);
1231   }
1232 };
1233 
1234 
1235 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1236   JVMWrapper("JVM_GetStackAccessControlContext");
1237   if (!UsePrivilegedStack) return NULL;
1238 
1239   ResourceMark rm(THREAD);
1240   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1241   JvmtiVMObjectAllocEventCollector oam;
1242 
1243   // count the protection domains on the execution stack. We collapse
1244   // duplicate consecutive protection domains into a single one, as
1245   // well as stopping when we hit a privileged frame.
1246 
1247   oop previous_protection_domain = NULL;
1248   Handle privileged_context(thread, NULL);
1249   bool is_privileged = false;
1250   oop protection_domain = NULL;
1251 
1252   // Iterate through Java frames
1253   vframeStream vfst(thread);
1254   for(; !vfst.at_end(); vfst.next()) {
1255     // get method of frame
1256     Method* method = vfst.method();
1257 
1258     // stop at the first privileged frame
1259     if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1260       method->name() == vmSymbols::executePrivileged_name())
1261     {
1262       // this frame is privileged
1263       is_privileged = true;
1264 
1265       javaVFrame *priv = vfst.asJavaVFrame();       // executePrivileged
1266 
1267       StackValueCollection* locals = priv->locals();
1268       StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1269       StackValue* clr_sv = locals->at(2); // Class<?> caller
1270       assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1271       assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1272       privileged_context    = ctx_sv->get_obj();
1273       Handle caller         = clr_sv->get_obj();
1274 
1275       Klass *caller_klass = java_lang_Class::as_Klass(caller());
1276       protection_domain  = caller_klass->protection_domain();
1277     } else {
1278       protection_domain = method->method_holder()->protection_domain();
1279     }
1280 
1281     if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1282       local_array->push(protection_domain);
1283       previous_protection_domain = protection_domain;
1284     }
1285 
1286     if (is_privileged) break;
1287   }
1288 
1289 
1290   // either all the domains on the stack were system domains, or
1291   // we had a privileged system domain
1292   if (local_array->is_empty()) {
1293     if (is_privileged && privileged_context.is_null()) return NULL;
1294 
1295     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1296     return JNIHandles::make_local(env, result);
1297   }
1298 
1299   // the resource area must be registered in case of a gc
1300   RegisterArrayForGC ragc(thread, local_array);
1301   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1302                                                  local_array->length(), CHECK_NULL);
1303   objArrayHandle h_context(thread, context);
1304   for (int index = 0; index < local_array->length(); index++) {
1305     h_context->obj_at_put(index, local_array->at(index));
1306   }
1307 
1308   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1309 
1310   return JNIHandles::make_local(env, result);
1311 JVM_END
1312 
1313 
1314 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1315   JVMWrapper("JVM_IsArrayClass");
1316   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1317   return (k != NULL) && k->is_array_klass() ? true : false;
1318 JVM_END
1319 
1320 
1321 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1322   JVMWrapper("JVM_IsPrimitiveClass");
1323   oop mirror = JNIHandles::resolve_non_null(cls);
1324   return (jboolean) java_lang_Class::is_primitive(mirror);
1325 JVM_END
1326 
1327 
1328 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1329   JVMWrapper("JVM_GetClassModifiers");
1330   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1331     // Primitive type
1332     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1333   }
1334 
1335   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1336   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1337   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1338   return k->modifier_flags();
1339 JVM_END
1340 
1341 
1342 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1343 
1344 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1345   JvmtiVMObjectAllocEventCollector oam;
1346   // ofClass is a reference to a java_lang_Class object. The mirror object
1347   // of an InstanceKlass
1348 
1349   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1350       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1351     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1352     return (jobjectArray)JNIHandles::make_local(env, result);
1353   }
1354 
1355   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1356   InnerClassesIterator iter(k);
1357 
1358   if (iter.length() == 0) {
1359     // Neither an inner nor outer class
1360     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1361     return (jobjectArray)JNIHandles::make_local(env, result);
1362   }
1363 
1364   // find inner class info
1365   constantPoolHandle cp(thread, k->constants());
1366   int length = iter.length();
1367 
1368   // Allocate temp. result array
1369   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1370   objArrayHandle result (THREAD, r);
1371   int members = 0;
1372 
1373   for (; !iter.done(); iter.next()) {
1374     int ioff = iter.inner_class_info_index();
1375     int ooff = iter.outer_class_info_index();
1376 
1377     if (ioff != 0 && ooff != 0) {
1378       // Check to see if the name matches the class we're looking for
1379       // before attempting to find the class.
1380       if (cp->klass_name_at_matches(k, ooff)) {
1381         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1382         if (outer_klass == k) {
1383            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1384            InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1385 
1386            // Throws an exception if outer klass has not declared k as
1387            // an inner klass
1388            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1389 
1390            result->obj_at_put(members, inner_klass->java_mirror());
1391            members++;
1392         }
1393       }
1394     }
1395   }
1396 
1397   if (members != length) {
1398     // Return array of right length
1399     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1400     for(int i = 0; i < members; i++) {
1401       res->obj_at_put(i, result->obj_at(i));
1402     }
1403     return (jobjectArray)JNIHandles::make_local(env, res);
1404   }
1405 
1406   return (jobjectArray)JNIHandles::make_local(env, result());
1407 JVM_END
1408 
1409 
1410 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1411 {
1412   // ofClass is a reference to a java_lang_Class object.
1413   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1414       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1415     return NULL;
1416   }
1417 
1418   bool inner_is_member = false;
1419   Klass* outer_klass
1420     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1421                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1422   if (outer_klass == NULL)  return NULL;  // already a top-level class
1423   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1424   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1425 }
1426 JVM_END
1427 
1428 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1429 {
1430   oop mirror = JNIHandles::resolve_non_null(cls);
1431   if (java_lang_Class::is_primitive(mirror) ||
1432       !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1433     return NULL;
1434   }
1435   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1436   int ooff = 0, noff = 0;
1437   if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1438     if (noff != 0) {
1439       constantPoolHandle i_cp(thread, k->constants());
1440       Symbol* name = i_cp->symbol_at(noff);
1441       Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1442       return (jstring) JNIHandles::make_local(env, str());
1443     }
1444   }
1445   return NULL;
1446 }
1447 JVM_END
1448 
1449 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1450   assert (cls != NULL, "illegal class");
1451   JVMWrapper("JVM_GetClassSignature");
1452   JvmtiVMObjectAllocEventCollector oam;
1453   ResourceMark rm(THREAD);
1454   // Return null for arrays and primatives
1455   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1456     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1457     if (k->is_instance_klass()) {
1458       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1459       if (sym == NULL) return NULL;
1460       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1461       return (jstring) JNIHandles::make_local(env, str());
1462     }
1463   }
1464   return NULL;
1465 JVM_END
1466 
1467 
1468 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1469   assert (cls != NULL, "illegal class");
1470   JVMWrapper("JVM_GetClassAnnotations");
1471 
1472   // Return null for arrays and primitives
1473   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1474     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1475     if (k->is_instance_klass()) {
1476       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1477       return (jbyteArray) JNIHandles::make_local(env, a);
1478     }
1479   }
1480   return NULL;
1481 JVM_END
1482 
1483 
1484 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1485   // some of this code was adapted from from jni_FromReflectedField
1486 
1487   oop reflected = JNIHandles::resolve_non_null(field);
1488   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1489   Klass* k    = java_lang_Class::as_Klass(mirror);
1490   int slot      = java_lang_reflect_Field::slot(reflected);
1491   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1492 
1493   InstanceKlass* ik = InstanceKlass::cast(k);
1494   intptr_t offset = ik->field_offset(slot);
1495 
1496   if (modifiers & JVM_ACC_STATIC) {
1497     // for static fields we only look in the current class
1498     if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1499       assert(false, "cannot find static field");
1500       return false;
1501     }
1502   } else {
1503     // for instance fields we start with the current class and work
1504     // our way up through the superclass chain
1505     if (!ik->find_field_from_offset(offset, false, &fd)) {
1506       assert(false, "cannot find instance field");
1507       return false;
1508     }
1509   }
1510   return true;
1511 }
1512 
1513 static Method* jvm_get_method_common(jobject method) {
1514   // some of this code was adapted from from jni_FromReflectedMethod
1515 
1516   oop reflected = JNIHandles::resolve_non_null(method);
1517   oop mirror    = NULL;
1518   int slot      = 0;
1519 
1520   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1521     mirror = java_lang_reflect_Constructor::clazz(reflected);
1522     slot   = java_lang_reflect_Constructor::slot(reflected);
1523   } else {
1524     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1525            "wrong type");
1526     mirror = java_lang_reflect_Method::clazz(reflected);
1527     slot   = java_lang_reflect_Method::slot(reflected);
1528   }
1529   Klass* k = java_lang_Class::as_Klass(mirror);
1530 
1531   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1532   assert(m != NULL, "cannot find method");
1533   return m;  // caller has to deal with NULL in product mode
1534 }
1535 
1536 /* Type use annotations support (JDK 1.8) */
1537 
1538 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1539   assert (cls != NULL, "illegal class");
1540   JVMWrapper("JVM_GetClassTypeAnnotations");
1541   ResourceMark rm(THREAD);
1542   // Return null for arrays and primitives
1543   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1544     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1545     if (k->is_instance_klass()) {
1546       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1547       if (type_annotations != NULL) {
1548         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1549         return (jbyteArray) JNIHandles::make_local(env, a);
1550       }
1551     }
1552   }
1553   return NULL;
1554 JVM_END
1555 
1556 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1557   assert (method != NULL, "illegal method");
1558   JVMWrapper("JVM_GetMethodTypeAnnotations");
1559 
1560   // method is a handle to a java.lang.reflect.Method object
1561   Method* m = jvm_get_method_common(method);
1562   if (m == NULL) {
1563     return NULL;
1564   }
1565 
1566   AnnotationArray* type_annotations = m->type_annotations();
1567   if (type_annotations != NULL) {
1568     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1569     return (jbyteArray) JNIHandles::make_local(env, a);
1570   }
1571 
1572   return NULL;
1573 JVM_END
1574 
1575 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1576   assert (field != NULL, "illegal field");
1577   JVMWrapper("JVM_GetFieldTypeAnnotations");
1578 
1579   fieldDescriptor fd;
1580   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1581   if (!gotFd) {
1582     return NULL;
1583   }
1584 
1585   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1586 JVM_END
1587 
1588 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1589   if (!cp->is_within_bounds(index)) {
1590     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1591   }
1592 }
1593 
1594 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1595 {
1596   JVMWrapper("JVM_GetMethodParameters");
1597   // method is a handle to a java.lang.reflect.Method object
1598   Method* method_ptr = jvm_get_method_common(method);
1599   methodHandle mh (THREAD, method_ptr);
1600   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1601   const int num_params = mh->method_parameters_length();
1602 
1603   if (num_params < 0) {
1604     // A -1 return value from method_parameters_length means there is no
1605     // parameter data.  Return null to indicate this to the reflection
1606     // API.
1607     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1608     return (jobjectArray)NULL;
1609   } else {
1610     // Otherwise, we return something up to reflection, even if it is
1611     // a zero-length array.  Why?  Because in some cases this can
1612     // trigger a MalformedParametersException.
1613 
1614     // make sure all the symbols are properly formatted
1615     for (int i = 0; i < num_params; i++) {
1616       MethodParametersElement* params = mh->method_parameters_start();
1617       int index = params[i].name_cp_index;
1618       constantPoolHandle cp(THREAD, mh->constants());
1619       bounds_check(cp, index, CHECK_NULL);
1620 
1621       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1622         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1623                     "Wrong type at constant pool index");
1624       }
1625 
1626     }
1627 
1628     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1629     objArrayHandle result (THREAD, result_oop);
1630 
1631     for (int i = 0; i < num_params; i++) {
1632       MethodParametersElement* params = mh->method_parameters_start();
1633       // For a 0 index, give a NULL symbol
1634       Symbol* sym = 0 != params[i].name_cp_index ?
1635         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1636       int flags = params[i].flags;
1637       oop param = Reflection::new_parameter(reflected_method, i, sym,
1638                                             flags, CHECK_NULL);
1639       result->obj_at_put(i, param);
1640     }
1641     return (jobjectArray)JNIHandles::make_local(env, result());
1642   }
1643 }
1644 JVM_END
1645 
1646 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1647 
1648 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1649 {
1650   JVMWrapper("JVM_GetClassDeclaredFields");
1651   JvmtiVMObjectAllocEventCollector oam;
1652 
1653   // Exclude primitive types and array types
1654   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1655       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1656     // Return empty array
1657     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1658     return (jobjectArray) JNIHandles::make_local(env, res);
1659   }
1660 
1661   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1662   constantPoolHandle cp(THREAD, k->constants());
1663 
1664   // Ensure class is linked
1665   k->link_class(CHECK_NULL);
1666 
1667   // Allocate result
1668   int num_fields;
1669 
1670   if (publicOnly) {
1671     num_fields = 0;
1672     for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1673       if (fs.access_flags().is_public()) ++num_fields;
1674     }
1675   } else {
1676     num_fields = k->java_fields_count();
1677   }
1678 
1679   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1680   objArrayHandle result (THREAD, r);
1681 
1682   int out_idx = 0;
1683   fieldDescriptor fd;
1684   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1685     if (!publicOnly || fs.access_flags().is_public()) {
1686       fd.reinitialize(k, fs.index());
1687       oop field = Reflection::new_field(&fd, CHECK_NULL);
1688       result->obj_at_put(out_idx, field);
1689       ++out_idx;
1690     }
1691   }
1692   assert(out_idx == num_fields, "just checking");
1693   return (jobjectArray) JNIHandles::make_local(env, result());
1694 }
1695 JVM_END
1696 
1697 static bool select_method(const methodHandle& method, bool want_constructor) {
1698   if (want_constructor) {
1699     return (method->is_initializer() && !method->is_static());
1700   } else {
1701     return  (!method->is_initializer() && !method->is_overpass());
1702   }
1703 }
1704 
1705 static jobjectArray get_class_declared_methods_helper(
1706                                   JNIEnv *env,
1707                                   jclass ofClass, jboolean publicOnly,
1708                                   bool want_constructor,
1709                                   Klass* klass, TRAPS) {
1710 
1711   JvmtiVMObjectAllocEventCollector oam;
1712 
1713   // Exclude primitive types and array types
1714   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1715       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1716     // Return empty array
1717     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1718     return (jobjectArray) JNIHandles::make_local(env, res);
1719   }
1720 
1721   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1722 
1723   // Ensure class is linked
1724   k->link_class(CHECK_NULL);
1725 
1726   Array<Method*>* methods = k->methods();
1727   int methods_length = methods->length();
1728 
1729   // Save original method_idnum in case of redefinition, which can change
1730   // the idnum of obsolete methods.  The new method will have the same idnum
1731   // but if we refresh the methods array, the counts will be wrong.
1732   ResourceMark rm(THREAD);
1733   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1734   int num_methods = 0;
1735 
1736   for (int i = 0; i < methods_length; i++) {
1737     methodHandle method(THREAD, methods->at(i));
1738     if (select_method(method, want_constructor)) {
1739       if (!publicOnly || method->is_public()) {
1740         idnums->push(method->method_idnum());
1741         ++num_methods;
1742       }
1743     }
1744   }
1745 
1746   // Allocate result
1747   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1748   objArrayHandle result (THREAD, r);
1749 
1750   // Now just put the methods that we selected above, but go by their idnum
1751   // in case of redefinition.  The methods can be redefined at any safepoint,
1752   // so above when allocating the oop array and below when creating reflect
1753   // objects.
1754   for (int i = 0; i < num_methods; i++) {
1755     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1756     if (method.is_null()) {
1757       // Method may have been deleted and seems this API can handle null
1758       // Otherwise should probably put a method that throws NSME
1759       result->obj_at_put(i, NULL);
1760     } else {
1761       oop m;
1762       if (want_constructor) {
1763         m = Reflection::new_constructor(method, CHECK_NULL);
1764       } else {
1765         m = Reflection::new_method(method, false, CHECK_NULL);
1766       }
1767       result->obj_at_put(i, m);
1768     }
1769   }
1770 
1771   return (jobjectArray) JNIHandles::make_local(env, result());
1772 }
1773 
1774 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1775 {
1776   JVMWrapper("JVM_GetClassDeclaredMethods");
1777   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1778                                            /*want_constructor*/ false,
1779                                            SystemDictionary::reflect_Method_klass(), THREAD);
1780 }
1781 JVM_END
1782 
1783 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1784 {
1785   JVMWrapper("JVM_GetClassDeclaredConstructors");
1786   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1787                                            /*want_constructor*/ true,
1788                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
1789 }
1790 JVM_END
1791 
1792 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1793 {
1794   JVMWrapper("JVM_GetClassAccessFlags");
1795   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1796     // Primitive type
1797     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1798   }
1799 
1800   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1801   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1802 }
1803 JVM_END
1804 
1805 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1806 {
1807   JVMWrapper("JVM_AreNestMates");
1808   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1809   assert(c->is_instance_klass(), "must be");
1810   InstanceKlass* ck = InstanceKlass::cast(c);
1811   Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1812   assert(m->is_instance_klass(), "must be");
1813   InstanceKlass* mk = InstanceKlass::cast(m);
1814   return ck->has_nestmate_access_to(mk, THREAD);
1815 }
1816 JVM_END
1817 
1818 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1819 {
1820   // current is not a primitive or array class
1821   JVMWrapper("JVM_GetNestHost");
1822   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1823   assert(c->is_instance_klass(), "must be");
1824   InstanceKlass* ck = InstanceKlass::cast(c);
1825   // Don't post exceptions if validation fails
1826   InstanceKlass* host = ck->nest_host(NULL, THREAD);
1827   return (jclass) (host == NULL ? NULL :
1828                    JNIHandles::make_local(THREAD, host->java_mirror()));
1829 }
1830 JVM_END
1831 
1832 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1833 {
1834   // current is not a primitive or array class
1835   JVMWrapper("JVM_GetNestMembers");
1836   Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1837   assert(c->is_instance_klass(), "must be");
1838   InstanceKlass* ck = InstanceKlass::cast(c);
1839   // Get the nest host for this nest - throw ICCE if validation fails
1840   Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1841   InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1842 
1843   {
1844     JvmtiVMObjectAllocEventCollector oam;
1845     Array<u2>* members = host->nest_members();
1846     int length = members == NULL ? 0 : members->length();
1847     // nest host is first in the array so make it one bigger
1848     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1849                                              length + 1, CHECK_NULL);
1850     objArrayHandle result (THREAD, r);
1851     result->obj_at_put(0, host->java_mirror());
1852     if (length != 0) {
1853       int i;
1854       for (i = 0; i < length; i++) {
1855          int cp_index = members->at(i);
1856          Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1857          if (k->is_instance_klass()) {
1858            InstanceKlass* nest_host_k =
1859              InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1860            if (nest_host_k == host) {
1861              result->obj_at_put(i+1, k->java_mirror());
1862            }
1863            else {
1864              // k's nest host is legal but it isn't our host so
1865              // throw ICCE
1866              ResourceMark rm(THREAD);
1867              Exceptions::fthrow(THREAD_AND_LOCATION,
1868                                 icce,
1869                                 "Nest member %s in %s declares a different nest host of %s",
1870                                 k->external_name(),
1871                                 host->external_name(),
1872                                 nest_host_k->external_name()
1873                            );
1874              return NULL;
1875            }
1876          }
1877          else {
1878            // we have a bad nest member entry - throw ICCE
1879            ResourceMark rm(THREAD);
1880            Exceptions::fthrow(THREAD_AND_LOCATION,
1881                               icce,
1882                               "Class %s can not be a nest member of %s",
1883                               k->external_name(),
1884                               host->external_name()
1885                               );
1886            return NULL;
1887          }
1888       }
1889     }
1890     else {
1891       assert(host == ck, "must be singleton nest");
1892     }
1893     return (jobjectArray)JNIHandles::make_local(THREAD, result());
1894   }
1895 }
1896 JVM_END
1897 
1898 // Constant pool access //////////////////////////////////////////////////////////
1899 
1900 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1901 {
1902   JVMWrapper("JVM_GetClassConstantPool");
1903   JvmtiVMObjectAllocEventCollector oam;
1904 
1905   // Return null for primitives and arrays
1906   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1907     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1908     if (k->is_instance_klass()) {
1909       InstanceKlass* k_h = InstanceKlass::cast(k);
1910       Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1911       reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1912       return JNIHandles::make_local(jcp());
1913     }
1914   }
1915   return NULL;
1916 }
1917 JVM_END
1918 
1919 
1920 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1921 {
1922   JVMWrapper("JVM_ConstantPoolGetSize");
1923   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1924   return cp->length();
1925 }
1926 JVM_END
1927 
1928 
1929 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1930 {
1931   JVMWrapper("JVM_ConstantPoolGetClassAt");
1932   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1933   bounds_check(cp, index, CHECK_NULL);
1934   constantTag tag = cp->tag_at(index);
1935   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1936     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1937   }
1938   Klass* k = cp->klass_at(index, CHECK_NULL);
1939   return (jclass) JNIHandles::make_local(k->java_mirror());
1940 }
1941 JVM_END
1942 
1943 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1944 {
1945   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1946   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1947   bounds_check(cp, index, CHECK_NULL);
1948   constantTag tag = cp->tag_at(index);
1949   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1950     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1951   }
1952   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1953   if (k == NULL) return NULL;
1954   return (jclass) JNIHandles::make_local(k->java_mirror());
1955 }
1956 JVM_END
1957 
1958 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1959   constantTag tag = cp->tag_at(index);
1960   if (!tag.is_method() && !tag.is_interface_method()) {
1961     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1962   }
1963   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1964   Klass* k_o;
1965   if (force_resolution) {
1966     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1967   } else {
1968     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1969     if (k_o == NULL) return NULL;
1970   }
1971   InstanceKlass* k = InstanceKlass::cast(k_o);
1972   Symbol* name = cp->uncached_name_ref_at(index);
1973   Symbol* sig  = cp->uncached_signature_ref_at(index);
1974   methodHandle m (THREAD, k->find_method(name, sig));
1975   if (m.is_null()) {
1976     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1977   }
1978   oop method;
1979   if (!m->is_initializer() || m->is_static()) {
1980     method = Reflection::new_method(m, true, CHECK_NULL);
1981   } else {
1982     method = Reflection::new_constructor(m, CHECK_NULL);
1983   }
1984   return JNIHandles::make_local(method);
1985 }
1986 
1987 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1988 {
1989   JVMWrapper("JVM_ConstantPoolGetMethodAt");
1990   JvmtiVMObjectAllocEventCollector oam;
1991   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1992   bounds_check(cp, index, CHECK_NULL);
1993   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1994   return res;
1995 }
1996 JVM_END
1997 
1998 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1999 {
2000   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2001   JvmtiVMObjectAllocEventCollector oam;
2002   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2003   bounds_check(cp, index, CHECK_NULL);
2004   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2005   return res;
2006 }
2007 JVM_END
2008 
2009 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2010   constantTag tag = cp->tag_at(index);
2011   if (!tag.is_field()) {
2012     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2013   }
2014   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2015   Klass* k_o;
2016   if (force_resolution) {
2017     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2018   } else {
2019     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2020     if (k_o == NULL) return NULL;
2021   }
2022   InstanceKlass* k = InstanceKlass::cast(k_o);
2023   Symbol* name = cp->uncached_name_ref_at(index);
2024   Symbol* sig  = cp->uncached_signature_ref_at(index);
2025   fieldDescriptor fd;
2026   Klass* target_klass = k->find_field(name, sig, &fd);
2027   if (target_klass == NULL) {
2028     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2029   }
2030   oop field = Reflection::new_field(&fd, CHECK_NULL);
2031   return JNIHandles::make_local(field);
2032 }
2033 
2034 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2035 {
2036   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2037   JvmtiVMObjectAllocEventCollector oam;
2038   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2039   bounds_check(cp, index, CHECK_NULL);
2040   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2041   return res;
2042 }
2043 JVM_END
2044 
2045 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2046 {
2047   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2048   JvmtiVMObjectAllocEventCollector oam;
2049   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2050   bounds_check(cp, index, CHECK_NULL);
2051   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2052   return res;
2053 }
2054 JVM_END
2055 
2056 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2057 {
2058   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2059   JvmtiVMObjectAllocEventCollector oam;
2060   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2061   bounds_check(cp, index, CHECK_NULL);
2062   constantTag tag = cp->tag_at(index);
2063   if (!tag.is_field_or_method()) {
2064     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2065   }
2066   int klass_ref = cp->uncached_klass_ref_index_at(index);
2067   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2068   Symbol*  member_name = cp->uncached_name_ref_at(index);
2069   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2070   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2071   objArrayHandle dest(THREAD, dest_o);
2072   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2073   dest->obj_at_put(0, str());
2074   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2075   dest->obj_at_put(1, str());
2076   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2077   dest->obj_at_put(2, str());
2078   return (jobjectArray) JNIHandles::make_local(dest());
2079 }
2080 JVM_END
2081 
2082 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2083 {
2084   JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2085   JvmtiVMObjectAllocEventCollector oam;
2086   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2087   bounds_check(cp, index, CHECK_0);
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   return (jint) cp->uncached_klass_ref_index_at(index);
2093 }
2094 JVM_END
2095 
2096 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2097 {
2098   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2099   JvmtiVMObjectAllocEventCollector oam;
2100   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2101   bounds_check(cp, index, CHECK_0);
2102   constantTag tag = cp->tag_at(index);
2103   if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2104     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2105   }
2106   return (jint) cp->uncached_name_and_type_ref_index_at(index);
2107 }
2108 JVM_END
2109 
2110 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2111 {
2112   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2113   JvmtiVMObjectAllocEventCollector oam;
2114   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2115   bounds_check(cp, index, CHECK_NULL);
2116   constantTag tag = cp->tag_at(index);
2117   if (!tag.is_name_and_type()) {
2118     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2119   }
2120   Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2121   Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2122   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2123   objArrayHandle dest(THREAD, dest_o);
2124   Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2125   dest->obj_at_put(0, str());
2126   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2127   dest->obj_at_put(1, str());
2128   return (jobjectArray) JNIHandles::make_local(dest());
2129 }
2130 JVM_END
2131 
2132 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2133 {
2134   JVMWrapper("JVM_ConstantPoolGetIntAt");
2135   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2136   bounds_check(cp, index, CHECK_0);
2137   constantTag tag = cp->tag_at(index);
2138   if (!tag.is_int()) {
2139     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2140   }
2141   return cp->int_at(index);
2142 }
2143 JVM_END
2144 
2145 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2146 {
2147   JVMWrapper("JVM_ConstantPoolGetLongAt");
2148   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2149   bounds_check(cp, index, CHECK_(0L));
2150   constantTag tag = cp->tag_at(index);
2151   if (!tag.is_long()) {
2152     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2153   }
2154   return cp->long_at(index);
2155 }
2156 JVM_END
2157 
2158 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2159 {
2160   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2161   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2162   bounds_check(cp, index, CHECK_(0.0f));
2163   constantTag tag = cp->tag_at(index);
2164   if (!tag.is_float()) {
2165     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2166   }
2167   return cp->float_at(index);
2168 }
2169 JVM_END
2170 
2171 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2172 {
2173   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2174   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2175   bounds_check(cp, index, CHECK_(0.0));
2176   constantTag tag = cp->tag_at(index);
2177   if (!tag.is_double()) {
2178     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2179   }
2180   return cp->double_at(index);
2181 }
2182 JVM_END
2183 
2184 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2185 {
2186   JVMWrapper("JVM_ConstantPoolGetStringAt");
2187   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2188   bounds_check(cp, index, CHECK_NULL);
2189   constantTag tag = cp->tag_at(index);
2190   if (!tag.is_string()) {
2191     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2192   }
2193   oop str = cp->string_at(index, CHECK_NULL);
2194   return (jstring) JNIHandles::make_local(str);
2195 }
2196 JVM_END
2197 
2198 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2199 {
2200   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2201   JvmtiVMObjectAllocEventCollector oam;
2202   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2203   bounds_check(cp, index, CHECK_NULL);
2204   constantTag tag = cp->tag_at(index);
2205   if (!tag.is_symbol()) {
2206     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2207   }
2208   Symbol* sym = cp->symbol_at(index);
2209   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2210   return (jstring) JNIHandles::make_local(str());
2211 }
2212 JVM_END
2213 
2214 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2215 {
2216   JVMWrapper("JVM_ConstantPoolGetTagAt");
2217   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2218   bounds_check(cp, index, CHECK_0);
2219   constantTag tag = cp->tag_at(index);
2220   jbyte result = tag.value();
2221   // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2222   // they are changed to the corresponding tags from the JVM spec, so that java code in
2223   // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2224   if (tag.is_klass_or_reference()) {
2225       result = JVM_CONSTANT_Class;
2226   } else if (tag.is_string_index()) {
2227       result = JVM_CONSTANT_String;
2228   } else if (tag.is_method_type_in_error()) {
2229       result = JVM_CONSTANT_MethodType;
2230   } else if (tag.is_method_handle_in_error()) {
2231       result = JVM_CONSTANT_MethodHandle;
2232   } else if (tag.is_dynamic_constant_in_error()) {
2233       result = JVM_CONSTANT_Dynamic;
2234   }
2235   return result;
2236 }
2237 JVM_END
2238 
2239 // Assertion support. //////////////////////////////////////////////////////////
2240 
2241 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2242   JVMWrapper("JVM_DesiredAssertionStatus");
2243   assert(cls != NULL, "bad class");
2244 
2245   oop r = JNIHandles::resolve(cls);
2246   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2247   if (java_lang_Class::is_primitive(r)) return false;
2248 
2249   Klass* k = java_lang_Class::as_Klass(r);
2250   assert(k->is_instance_klass(), "must be an instance klass");
2251   if (!k->is_instance_klass()) return false;
2252 
2253   ResourceMark rm(THREAD);
2254   const char* name = k->name()->as_C_string();
2255   bool system_class = k->class_loader() == NULL;
2256   return JavaAssertions::enabled(name, system_class);
2257 
2258 JVM_END
2259 
2260 
2261 // Return a new AssertionStatusDirectives object with the fields filled in with
2262 // command-line assertion arguments (i.e., -ea, -da).
2263 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2264   JVMWrapper("JVM_AssertionStatusDirectives");
2265   JvmtiVMObjectAllocEventCollector oam;
2266   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2267   return JNIHandles::make_local(env, asd);
2268 JVM_END
2269 
2270 // Verification ////////////////////////////////////////////////////////////////////////////////
2271 
2272 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2273 
2274 // RedefineClasses support: bug 6214132 caused verification to fail.
2275 // All functions from this section should call the jvmtiThreadSate function:
2276 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2277 // The function returns a Klass* of the _scratch_class if the verifier
2278 // was invoked in the middle of the class redefinition.
2279 // Otherwise it returns its argument value which is the _the_class Klass*.
2280 // Please, refer to the description in the jvmtiThreadSate.hpp.
2281 
2282 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2283   JVMWrapper("JVM_GetClassNameUTF");
2284   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2285   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2286   return k->name()->as_utf8();
2287 JVM_END
2288 
2289 
2290 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2291   JVMWrapper("JVM_GetClassCPTypes");
2292   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2293   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2294   // types will have length zero if this is not an InstanceKlass
2295   // (length is determined by call to JVM_GetClassCPEntriesCount)
2296   if (k->is_instance_klass()) {
2297     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2298     for (int index = cp->length() - 1; index >= 0; index--) {
2299       constantTag tag = cp->tag_at(index);
2300       types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2301     }
2302   }
2303 JVM_END
2304 
2305 
2306 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2307   JVMWrapper("JVM_GetClassCPEntriesCount");
2308   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2309   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2310   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2311 JVM_END
2312 
2313 
2314 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2315   JVMWrapper("JVM_GetClassFieldsCount");
2316   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2317   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2318   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2319 JVM_END
2320 
2321 
2322 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2323   JVMWrapper("JVM_GetClassMethodsCount");
2324   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2325   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2326   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2327 JVM_END
2328 
2329 
2330 // The following methods, used for the verifier, are never called with
2331 // array klasses, so a direct cast to InstanceKlass is safe.
2332 // Typically, these methods are called in a loop with bounds determined
2333 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2334 // zero for arrays.
2335 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2336   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2337   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2338   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2339   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2340   int length = method->checked_exceptions_length();
2341   if (length > 0) {
2342     CheckedExceptionElement* table= method->checked_exceptions_start();
2343     for (int i = 0; i < length; i++) {
2344       exceptions[i] = table[i].class_cp_index;
2345     }
2346   }
2347 JVM_END
2348 
2349 
2350 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2351   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2352   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2353   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2354   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2355   return method->checked_exceptions_length();
2356 JVM_END
2357 
2358 
2359 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2360   JVMWrapper("JVM_GetMethodIxByteCode");
2361   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2362   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2363   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2364   memcpy(code, method->code_base(), method->code_size());
2365 JVM_END
2366 
2367 
2368 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2369   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2370   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2371   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2372   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2373   return method->code_size();
2374 JVM_END
2375 
2376 
2377 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2378   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2379   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2380   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2381   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2382   ExceptionTable extable(method);
2383   entry->start_pc   = extable.start_pc(entry_index);
2384   entry->end_pc     = extable.end_pc(entry_index);
2385   entry->handler_pc = extable.handler_pc(entry_index);
2386   entry->catchType  = extable.catch_type_index(entry_index);
2387 JVM_END
2388 
2389 
2390 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2391   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2392   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2393   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2394   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2395   return method->exception_table_length();
2396 JVM_END
2397 
2398 
2399 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2400   JVMWrapper("JVM_GetMethodIxModifiers");
2401   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2402   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2403   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2404   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2405 JVM_END
2406 
2407 
2408 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2409   JVMWrapper("JVM_GetFieldIxModifiers");
2410   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2411   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2412   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2413 JVM_END
2414 
2415 
2416 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2417   JVMWrapper("JVM_GetMethodIxLocalsCount");
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->max_locals();
2422 JVM_END
2423 
2424 
2425 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2426   JVMWrapper("JVM_GetMethodIxArgsSize");
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->size_of_parameters();
2431 JVM_END
2432 
2433 
2434 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2435   JVMWrapper("JVM_GetMethodIxMaxStack");
2436   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2437   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2438   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2439   return method->verifier_max_stack();
2440 JVM_END
2441 
2442 
2443 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2444   JVMWrapper("JVM_IsConstructorIx");
2445   ResourceMark rm(THREAD);
2446   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2447   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2448   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2449   return method->name() == vmSymbols::object_initializer_name();
2450 JVM_END
2451 
2452 
2453 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2454   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2455   ResourceMark rm(THREAD);
2456   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2457   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2458   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2459   return method->is_overpass();
2460 JVM_END
2461 
2462 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2463   JVMWrapper("JVM_GetMethodIxIxUTF");
2464   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2465   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2466   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2467   return method->name()->as_utf8();
2468 JVM_END
2469 
2470 
2471 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2472   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2473   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2474   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2475   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2476   return method->signature()->as_utf8();
2477 JVM_END
2478 
2479 /**
2480  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2481  * read entries in the constant pool.  Since the old verifier always
2482  * works on a copy of the code, it will not see any rewriting that
2483  * may possibly occur in the middle of verification.  So it is important
2484  * that nothing it calls tries to use the cpCache instead of the raw
2485  * constant pool, so we must use cp->uncached_x methods when appropriate.
2486  */
2487 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2488   JVMWrapper("JVM_GetCPFieldNameUTF");
2489   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2490   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2491   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2492   switch (cp->tag_at(cp_index).value()) {
2493     case JVM_CONSTANT_Fieldref:
2494       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2495     default:
2496       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2497   }
2498   ShouldNotReachHere();
2499   return NULL;
2500 JVM_END
2501 
2502 
2503 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2504   JVMWrapper("JVM_GetCPMethodNameUTF");
2505   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2506   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2507   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2508   switch (cp->tag_at(cp_index).value()) {
2509     case JVM_CONSTANT_InterfaceMethodref:
2510     case JVM_CONSTANT_Methodref:
2511       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2512     default:
2513       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2514   }
2515   ShouldNotReachHere();
2516   return NULL;
2517 JVM_END
2518 
2519 
2520 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2521   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2522   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2523   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2524   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2525   switch (cp->tag_at(cp_index).value()) {
2526     case JVM_CONSTANT_InterfaceMethodref:
2527     case JVM_CONSTANT_Methodref:
2528       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2529     default:
2530       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2531   }
2532   ShouldNotReachHere();
2533   return NULL;
2534 JVM_END
2535 
2536 
2537 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2538   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2539   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2540   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2541   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2542   switch (cp->tag_at(cp_index).value()) {
2543     case JVM_CONSTANT_Fieldref:
2544       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2545     default:
2546       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2547   }
2548   ShouldNotReachHere();
2549   return NULL;
2550 JVM_END
2551 
2552 
2553 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2554   JVMWrapper("JVM_GetCPClassNameUTF");
2555   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2556   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2557   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2558   Symbol* classname = cp->klass_name_at(cp_index);
2559   return classname->as_utf8();
2560 JVM_END
2561 
2562 
2563 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2564   JVMWrapper("JVM_GetCPFieldClassNameUTF");
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       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2571       Symbol* classname = cp->klass_name_at(class_index);
2572       return classname->as_utf8();
2573     }
2574     default:
2575       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2576   }
2577   ShouldNotReachHere();
2578   return NULL;
2579 JVM_END
2580 
2581 
2582 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2583   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2584   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2585   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2586   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2587   switch (cp->tag_at(cp_index).value()) {
2588     case JVM_CONSTANT_Methodref:
2589     case JVM_CONSTANT_InterfaceMethodref: {
2590       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2591       Symbol* classname = cp->klass_name_at(class_index);
2592       return classname->as_utf8();
2593     }
2594     default:
2595       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2596   }
2597   ShouldNotReachHere();
2598   return NULL;
2599 JVM_END
2600 
2601 
2602 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2603   JVMWrapper("JVM_GetCPFieldModifiers");
2604   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2605   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2606   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2607   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2608   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2609   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2610   switch (cp->tag_at(cp_index).value()) {
2611     case JVM_CONSTANT_Fieldref: {
2612       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2613       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2614       InstanceKlass* ik = InstanceKlass::cast(k_called);
2615       for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2616         if (fs.name() == name && fs.signature() == signature) {
2617           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2618         }
2619       }
2620       return -1;
2621     }
2622     default:
2623       fatal("JVM_GetCPFieldModifiers: illegal constant");
2624   }
2625   ShouldNotReachHere();
2626   return 0;
2627 JVM_END
2628 
2629 
2630 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2631   JVMWrapper("JVM_GetCPMethodModifiers");
2632   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2633   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2634   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2635   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2636   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2637   switch (cp->tag_at(cp_index).value()) {
2638     case JVM_CONSTANT_Methodref:
2639     case JVM_CONSTANT_InterfaceMethodref: {
2640       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2641       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2642       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2643       int methods_count = methods->length();
2644       for (int i = 0; i < methods_count; i++) {
2645         Method* method = methods->at(i);
2646         if (method->name() == name && method->signature() == signature) {
2647             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2648         }
2649       }
2650       return -1;
2651     }
2652     default:
2653       fatal("JVM_GetCPMethodModifiers: illegal constant");
2654   }
2655   ShouldNotReachHere();
2656   return 0;
2657 JVM_END
2658 
2659 
2660 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2661 
2662 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2663   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2664 JVM_END
2665 
2666 
2667 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2668   JVMWrapper("JVM_IsSameClassPackage");
2669   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2670   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2671   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2672   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2673   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2674 JVM_END
2675 
2676 // Printing support //////////////////////////////////////////////////
2677 extern "C" {
2678 
2679 ATTRIBUTE_PRINTF(3, 0)
2680 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2681   // Reject count values that are negative signed values converted to
2682   // unsigned; see bug 4399518, 4417214
2683   if ((intptr_t)count <= 0) return -1;
2684 
2685   int result = os::vsnprintf(str, count, fmt, args);
2686   if (result > 0 && (size_t)result >= count) {
2687     result = -1;
2688   }
2689 
2690   return result;
2691 }
2692 
2693 ATTRIBUTE_PRINTF(3, 4)
2694 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2695   va_list args;
2696   int len;
2697   va_start(args, fmt);
2698   len = jio_vsnprintf(str, count, fmt, args);
2699   va_end(args);
2700   return len;
2701 }
2702 
2703 ATTRIBUTE_PRINTF(2, 3)
2704 int jio_fprintf(FILE* f, const char *fmt, ...) {
2705   int len;
2706   va_list args;
2707   va_start(args, fmt);
2708   len = jio_vfprintf(f, fmt, args);
2709   va_end(args);
2710   return len;
2711 }
2712 
2713 ATTRIBUTE_PRINTF(2, 0)
2714 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2715   if (Arguments::vfprintf_hook() != NULL) {
2716      return Arguments::vfprintf_hook()(f, fmt, args);
2717   } else {
2718     return vfprintf(f, fmt, args);
2719   }
2720 }
2721 
2722 ATTRIBUTE_PRINTF(1, 2)
2723 JNIEXPORT int jio_printf(const char *fmt, ...) {
2724   int len;
2725   va_list args;
2726   va_start(args, fmt);
2727   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2728   va_end(args);
2729   return len;
2730 }
2731 
2732 // HotSpot specific jio method
2733 void jio_print(const char* s, size_t len) {
2734   // Try to make this function as atomic as possible.
2735   if (Arguments::vfprintf_hook() != NULL) {
2736     jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2737   } else {
2738     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2739     size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2740   }
2741 }
2742 
2743 } // Extern C
2744 
2745 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2746 
2747 // In most of the JVM thread support functions we need to access the
2748 // thread through a ThreadsListHandle to prevent it from exiting and
2749 // being reclaimed while we try to operate on it. The exceptions to this
2750 // rule are when operating on the current thread, or if the monitor of
2751 // the target java.lang.Thread is locked at the Java level - in both
2752 // cases the target cannot exit.
2753 
2754 static void thread_entry(JavaThread* thread, TRAPS) {
2755   HandleMark hm(THREAD);
2756   Handle obj(THREAD, thread->threadObj());
2757   JavaValue result(T_VOID);
2758   JavaCalls::call_virtual(&result,
2759                           obj,
2760                           SystemDictionary::Thread_klass(),
2761                           vmSymbols::run_method_name(),
2762                           vmSymbols::void_method_signature(),
2763                           THREAD);
2764 }
2765 
2766 
2767 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2768   JVMWrapper("JVM_StartThread");
2769   JavaThread *native_thread = NULL;
2770 
2771   // We cannot hold the Threads_lock when we throw an exception,
2772   // due to rank ordering issues. Example:  we might need to grab the
2773   // Heap_lock while we construct the exception.
2774   bool throw_illegal_thread_state = false;
2775 
2776   // We must release the Threads_lock before we can post a jvmti event
2777   // in Thread::start.
2778   {
2779     // Ensure that the C++ Thread and OSThread structures aren't freed before
2780     // we operate.
2781     MutexLocker mu(Threads_lock);
2782 
2783     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2784     // re-starting an already started thread, so we should usually find
2785     // that the JavaThread is null. However for a JNI attached thread
2786     // there is a small window between the Thread object being created
2787     // (with its JavaThread set) and the update to its threadStatus, so we
2788     // have to check for this
2789     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2790       throw_illegal_thread_state = true;
2791     } else {
2792       // We could also check the stillborn flag to see if this thread was already stopped, but
2793       // for historical reasons we let the thread detect that itself when it starts running
2794 
2795       jlong size =
2796              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2797       // Allocate the C++ Thread structure and create the native thread.  The
2798       // stack size retrieved from java is 64-bit signed, but the constructor takes
2799       // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2800       //  - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2801       //  - Avoid passing negative values which would result in really large stacks.
2802       NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2803       size_t sz = size > 0 ? (size_t) size : 0;
2804       native_thread = new JavaThread(&thread_entry, sz);
2805 
2806       // At this point it may be possible that no osthread was created for the
2807       // JavaThread due to lack of memory. Check for this situation and throw
2808       // an exception if necessary. Eventually we may want to change this so
2809       // that we only grab the lock if the thread was created successfully -
2810       // then we can also do this check and throw the exception in the
2811       // JavaThread constructor.
2812       if (native_thread->osthread() != NULL) {
2813         // Note: the current thread is not being used within "prepare".
2814         native_thread->prepare(jthread);
2815       }
2816     }
2817   }
2818 
2819   if (throw_illegal_thread_state) {
2820     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2821   }
2822 
2823   assert(native_thread != NULL, "Starting null thread?");
2824 
2825   if (native_thread->osthread() == NULL) {
2826     // No one should hold a reference to the 'native_thread'.
2827     native_thread->smr_delete();
2828     if (JvmtiExport::should_post_resource_exhausted()) {
2829       JvmtiExport::post_resource_exhausted(
2830         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2831         os::native_thread_creation_failed_msg());
2832     }
2833     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2834               os::native_thread_creation_failed_msg());
2835   }
2836 
2837   Thread::start(native_thread);
2838 
2839 JVM_END
2840 
2841 
2842 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2843 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2844 // but is thought to be reliable and simple. In the case, where the receiver is the
2845 // same thread as the sender, no VM_Operation is needed.
2846 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2847   JVMWrapper("JVM_StopThread");
2848 
2849   // A nested ThreadsListHandle will grab the Threads_lock so create
2850   // tlh before we resolve throwable.
2851   ThreadsListHandle tlh(thread);
2852   oop java_throwable = JNIHandles::resolve(throwable);
2853   if (java_throwable == NULL) {
2854     THROW(vmSymbols::java_lang_NullPointerException());
2855   }
2856   oop java_thread = NULL;
2857   JavaThread* receiver = NULL;
2858   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2859   Events::log_exception(thread,
2860                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2861                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
2862 
2863   if (is_alive) {
2864     // jthread refers to a live JavaThread.
2865     if (thread == receiver) {
2866       // Exception is getting thrown at self so no VM_Operation needed.
2867       THROW_OOP(java_throwable);
2868     } else {
2869       // Use a VM_Operation to throw the exception.
2870       Thread::send_async_exception(java_thread, java_throwable);
2871     }
2872   } else {
2873     // Either:
2874     // - target thread has not been started before being stopped, or
2875     // - target thread already terminated
2876     // We could read the threadStatus to determine which case it is
2877     // but that is overkill as it doesn't matter. We must set the
2878     // stillborn flag for the first case, and if the thread has already
2879     // exited setting this flag has no effect.
2880     java_lang_Thread::set_stillborn(java_thread);
2881   }
2882 JVM_END
2883 
2884 
2885 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2886   JVMWrapper("JVM_IsThreadAlive");
2887 
2888   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2889   return java_lang_Thread::is_alive(thread_oop);
2890 JVM_END
2891 
2892 
2893 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2894   JVMWrapper("JVM_SuspendThread");
2895 
2896   ThreadsListHandle tlh(thread);
2897   JavaThread* receiver = NULL;
2898   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2899   if (is_alive) {
2900     // jthread refers to a live JavaThread.
2901     {
2902       MutexLocker ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2903       if (receiver->is_external_suspend()) {
2904         // Don't allow nested external suspend requests. We can't return
2905         // an error from this interface so just ignore the problem.
2906         return;
2907       }
2908       if (receiver->is_exiting()) { // thread is in the process of exiting
2909         return;
2910       }
2911       receiver->set_external_suspend();
2912     }
2913 
2914     // java_suspend() will catch threads in the process of exiting
2915     // and will ignore them.
2916     receiver->java_suspend();
2917 
2918     // It would be nice to have the following assertion in all the
2919     // time, but it is possible for a racing resume request to have
2920     // resumed this thread right after we suspended it. Temporarily
2921     // enable this assertion if you are chasing a different kind of
2922     // bug.
2923     //
2924     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2925     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2926   }
2927 JVM_END
2928 
2929 
2930 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2931   JVMWrapper("JVM_ResumeThread");
2932 
2933   ThreadsListHandle tlh(thread);
2934   JavaThread* receiver = NULL;
2935   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2936   if (is_alive) {
2937     // jthread refers to a live JavaThread.
2938 
2939     // This is the original comment for this Threads_lock grab:
2940     //   We need to *always* get the threads lock here, since this operation cannot be allowed during
2941     //   a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2942     //   threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2943     //   looks at it.
2944     //
2945     // The above comment dates back to when we had both internal and
2946     // external suspend APIs that shared a common underlying mechanism.
2947     // External suspend is now entirely cooperative and doesn't share
2948     // anything with internal suspend. That said, there are some
2949     // assumptions in the VM that an external resume grabs the
2950     // Threads_lock. We can't drop the Threads_lock grab here until we
2951     // resolve the assumptions that exist elsewhere.
2952     //
2953     MutexLocker ml(Threads_lock);
2954     receiver->java_resume();
2955   }
2956 JVM_END
2957 
2958 
2959 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2960   JVMWrapper("JVM_SetThreadPriority");
2961 
2962   ThreadsListHandle tlh(thread);
2963   oop java_thread = NULL;
2964   JavaThread* receiver = NULL;
2965   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2966   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2967 
2968   if (is_alive) {
2969     // jthread refers to a live JavaThread.
2970     Thread::set_priority(receiver, (ThreadPriority)prio);
2971   }
2972   // Implied else: If the JavaThread hasn't started yet, then the
2973   // priority set in the java.lang.Thread object above will be pushed
2974   // down when it does start.
2975 JVM_END
2976 
2977 
2978 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2979   JVMWrapper("JVM_Yield");
2980   if (os::dont_yield()) return;
2981   HOTSPOT_THREAD_YIELD();
2982   os::naked_yield();
2983 JVM_END
2984 
2985 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
2986   assert(event != NULL, "invariant");
2987   assert(event->should_commit(), "invariant");
2988   event->set_time(millis);
2989   event->commit();
2990 }
2991 
2992 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2993   JVMWrapper("JVM_Sleep");
2994 
2995   if (millis < 0) {
2996     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2997   }
2998 
2999   if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3000     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3001   }
3002 
3003   // Save current thread state and restore it at the end of this block.
3004   // And set new thread state to SLEEPING.
3005   JavaThreadSleepState jtss(thread);
3006 
3007   HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3008   EventThreadSleep event;
3009 
3010   if (millis == 0) {
3011     os::naked_yield();
3012   } else {
3013     ThreadState old_state = thread->osthread()->get_state();
3014     thread->osthread()->set_state(SLEEPING);
3015     if (!thread->sleep(millis)) { // interrupted
3016       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3017       // us while we were sleeping. We do not overwrite those.
3018       if (!HAS_PENDING_EXCEPTION) {
3019         if (event.should_commit()) {
3020           post_thread_sleep_event(&event, millis);
3021         }
3022         HOTSPOT_THREAD_SLEEP_END(1);
3023 
3024         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3025         // to properly restore the thread state.  That's likely wrong.
3026         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3027       }
3028     }
3029     thread->osthread()->set_state(old_state);
3030   }
3031   if (event.should_commit()) {
3032     post_thread_sleep_event(&event, millis);
3033   }
3034   HOTSPOT_THREAD_SLEEP_END(0);
3035 JVM_END
3036 
3037 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3038   JVMWrapper("JVM_CurrentThread");
3039   oop jthread = thread->threadObj();
3040   assert (thread != NULL, "no current thread!");
3041   return JNIHandles::make_local(env, jthread);
3042 JVM_END
3043 
3044 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3045   JVMWrapper("JVM_Interrupt");
3046 
3047   ThreadsListHandle tlh(thread);
3048   JavaThread* receiver = NULL;
3049   bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3050   if (is_alive) {
3051     // jthread refers to a live JavaThread.
3052     receiver->interrupt();
3053   }
3054 JVM_END
3055 
3056 
3057 // Return true iff the current thread has locked the object passed in
3058 
3059 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3060   JVMWrapper("JVM_HoldsLock");
3061   assert(THREAD->is_Java_thread(), "sanity check");
3062   if (obj == NULL) {
3063     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3064   }
3065   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3066   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3067 JVM_END
3068 
3069 
3070 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3071   JVMWrapper("JVM_DumpAllStacks");
3072   VM_PrintThreads op;
3073   VMThread::execute(&op);
3074   if (JvmtiExport::should_post_data_dump()) {
3075     JvmtiExport::post_data_dump();
3076   }
3077 JVM_END
3078 
3079 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3080   JVMWrapper("JVM_SetNativeThreadName");
3081 
3082   // We don't use a ThreadsListHandle here because the current thread
3083   // must be alive.
3084   oop java_thread = JNIHandles::resolve_non_null(jthread);
3085   JavaThread* thr = java_lang_Thread::thread(java_thread);
3086   if (thread == thr && !thr->has_attached_via_jni()) {
3087     // Thread naming is only supported for the current thread and
3088     // we don't set the name of an attached thread to avoid stepping
3089     // on other programs.
3090     ResourceMark rm(thread);
3091     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3092     os::set_native_thread_name(thread_name);
3093   }
3094 JVM_END
3095 
3096 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3097 
3098 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3099   JVMWrapper("JVM_GetClassContext");
3100   ResourceMark rm(THREAD);
3101   JvmtiVMObjectAllocEventCollector oam;
3102   vframeStream vfst(thread);
3103 
3104   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3105     // This must only be called from SecurityManager.getClassContext
3106     Method* m = vfst.method();
3107     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3108           m->name()          == vmSymbols::getClassContext_name() &&
3109           m->signature()     == vmSymbols::void_class_array_signature())) {
3110       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3111     }
3112   }
3113 
3114   // Collect method holders
3115   GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3116   for (; !vfst.at_end(); vfst.security_next()) {
3117     Method* m = vfst.method();
3118     // Native frames are not returned
3119     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3120       Klass* holder = m->method_holder();
3121       assert(holder->is_klass(), "just checking");
3122       klass_array->append(holder);
3123     }
3124   }
3125 
3126   // Create result array of type [Ljava/lang/Class;
3127   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3128   // Fill in mirrors corresponding to method holders
3129   for (int i = 0; i < klass_array->length(); i++) {
3130     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3131   }
3132 
3133   return (jobjectArray) JNIHandles::make_local(env, result);
3134 JVM_END
3135 
3136 
3137 // java.lang.Package ////////////////////////////////////////////////////////////////
3138 
3139 
3140 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3141   JVMWrapper("JVM_GetSystemPackage");
3142   ResourceMark rm(THREAD);
3143   JvmtiVMObjectAllocEventCollector oam;
3144   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3145   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3146   return (jstring) JNIHandles::make_local(result);
3147 JVM_END
3148 
3149 
3150 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3151   JVMWrapper("JVM_GetSystemPackages");
3152   JvmtiVMObjectAllocEventCollector oam;
3153   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3154   return (jobjectArray) JNIHandles::make_local(result);
3155 JVM_END
3156 
3157 
3158 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3159 
3160 
3161 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3162   JVMWrapper("JVM_GetAndClearReferencePendingList");
3163 
3164   MonitorLocker ml(Heap_lock);
3165   oop ref = Universe::reference_pending_list();
3166   if (ref != NULL) {
3167     Universe::set_reference_pending_list(NULL);
3168   }
3169   return JNIHandles::make_local(env, ref);
3170 JVM_END
3171 
3172 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3173   JVMWrapper("JVM_HasReferencePendingList");
3174   MonitorLocker ml(Heap_lock);
3175   return Universe::has_reference_pending_list();
3176 JVM_END
3177 
3178 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3179   JVMWrapper("JVM_WaitForReferencePendingList");
3180   MonitorLocker ml(Heap_lock);
3181   while (!Universe::has_reference_pending_list()) {
3182     ml.wait();
3183   }
3184 JVM_END
3185 
3186 
3187 // ObjectInputStream ///////////////////////////////////////////////////////////////
3188 
3189 // Return the first user-defined class loader up the execution stack, or null
3190 // if only code from the bootstrap or platform class loader is on the stack.
3191 
3192 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3193   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3194     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3195     oop loader = vfst.method()->method_holder()->class_loader();
3196     if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3197       return JNIHandles::make_local(env, loader);
3198     }
3199   }
3200   return NULL;
3201 JVM_END
3202 
3203 
3204 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3205 
3206 
3207 // resolve array handle and check arguments
3208 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3209   if (arr == NULL) {
3210     THROW_0(vmSymbols::java_lang_NullPointerException());
3211   }
3212   oop a = JNIHandles::resolve_non_null(arr);
3213   if (!a->is_array()) {
3214     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3215   } else if (type_array_only && !a->is_typeArray()) {
3216     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3217   }
3218   return arrayOop(a);
3219 }
3220 
3221 
3222 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3223   JVMWrapper("JVM_GetArrayLength");
3224   arrayOop a = check_array(env, arr, false, CHECK_0);
3225   return a->length();
3226 JVM_END
3227 
3228 
3229 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3230   JVMWrapper("JVM_Array_Get");
3231   JvmtiVMObjectAllocEventCollector oam;
3232   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3233   jvalue value;
3234   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3235   oop box = Reflection::box(&value, type, CHECK_NULL);
3236   return JNIHandles::make_local(env, box);
3237 JVM_END
3238 
3239 
3240 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3241   JVMWrapper("JVM_GetPrimitiveArrayElement");
3242   jvalue value;
3243   value.i = 0; // to initialize value before getting used in CHECK
3244   arrayOop a = check_array(env, arr, true, CHECK_(value));
3245   assert(a->is_typeArray(), "just checking");
3246   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3247   BasicType wide_type = (BasicType) wCode;
3248   if (type != wide_type) {
3249     Reflection::widen(&value, type, wide_type, CHECK_(value));
3250   }
3251   return value;
3252 JVM_END
3253 
3254 
3255 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3256   JVMWrapper("JVM_SetArrayElement");
3257   arrayOop a = check_array(env, arr, false, CHECK);
3258   oop box = JNIHandles::resolve(val);
3259   jvalue value;
3260   value.i = 0; // to initialize value before getting used in CHECK
3261   BasicType value_type;
3262   if (a->is_objArray()) {
3263     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3264     value_type = Reflection::unbox_for_regular_object(box, &value);
3265   } else {
3266     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3267   }
3268   Reflection::array_set(&value, a, index, value_type, CHECK);
3269 JVM_END
3270 
3271 
3272 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3273   JVMWrapper("JVM_SetPrimitiveArrayElement");
3274   arrayOop a = check_array(env, arr, true, CHECK);
3275   assert(a->is_typeArray(), "just checking");
3276   BasicType value_type = (BasicType) vCode;
3277   Reflection::array_set(&v, a, index, value_type, CHECK);
3278 JVM_END
3279 
3280 
3281 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3282   JVMWrapper("JVM_NewArray");
3283   JvmtiVMObjectAllocEventCollector oam;
3284   oop element_mirror = JNIHandles::resolve(eltClass);
3285   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3286   return JNIHandles::make_local(env, result);
3287 JVM_END
3288 
3289 
3290 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3291   JVMWrapper("JVM_NewMultiArray");
3292   JvmtiVMObjectAllocEventCollector oam;
3293   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3294   oop element_mirror = JNIHandles::resolve(eltClass);
3295   assert(dim_array->is_typeArray(), "just checking");
3296   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3297   return JNIHandles::make_local(env, result);
3298 JVM_END
3299 
3300 
3301 // Library support ///////////////////////////////////////////////////////////////////////////
3302 
3303 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3304   //%note jvm_ct
3305   JVMWrapper("JVM_LoadLibrary");
3306   char ebuf[1024];
3307   void *load_result;
3308   {
3309     ThreadToNativeFromVM ttnfvm(thread);
3310     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3311   }
3312   if (load_result == NULL) {
3313     char msg[1024];
3314     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3315     // Since 'ebuf' may contain a string encoded using
3316     // platform encoding scheme, we need to pass
3317     // Exceptions::unsafe_to_utf8 to the new_exception method
3318     // as the last argument. See bug 6367357.
3319     Handle h_exception =
3320       Exceptions::new_exception(thread,
3321                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3322                                 msg, Exceptions::unsafe_to_utf8);
3323 
3324     THROW_HANDLE_0(h_exception);
3325   }
3326   return load_result;
3327 JVM_END
3328 
3329 
3330 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3331   JVMWrapper("JVM_UnloadLibrary");
3332   os::dll_unload(handle);
3333 JVM_END
3334 
3335 
3336 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3337   JVMWrapper("JVM_FindLibraryEntry");
3338   return os::dll_lookup(handle, name);
3339 JVM_END
3340 
3341 
3342 // JNI version ///////////////////////////////////////////////////////////////////////////////
3343 
3344 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3345   JVMWrapper("JVM_IsSupportedJNIVersion");
3346   return Threads::is_supported_jni_version_including_1_1(version);
3347 JVM_END
3348 
3349 
3350 // String support ///////////////////////////////////////////////////////////////////////////
3351 
3352 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3353   JVMWrapper("JVM_InternString");
3354   JvmtiVMObjectAllocEventCollector oam;
3355   if (str == NULL) return NULL;
3356   oop string = JNIHandles::resolve_non_null(str);
3357   oop result = StringTable::intern(string, CHECK_NULL);
3358   return (jstring) JNIHandles::make_local(env, result);
3359 JVM_END
3360 
3361 
3362 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3363 
3364 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3365 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3366 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3367 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3368 // nature. JavaThreads will be "in native" when using this API from JDK code.
3369 
3370 
3371 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3372   VM_Exit::block_if_vm_exited();
3373   JVMWrapper("JVM_RawMonitorCreate");
3374   return new os::PlatformMutex();
3375 }
3376 
3377 
3378 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3379   VM_Exit::block_if_vm_exited();
3380   JVMWrapper("JVM_RawMonitorDestroy");
3381   delete ((os::PlatformMutex*) mon);
3382 }
3383 
3384 
3385 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3386   VM_Exit::block_if_vm_exited();
3387   JVMWrapper("JVM_RawMonitorEnter");
3388   ((os::PlatformMutex*) mon)->lock();
3389   return 0;
3390 }
3391 
3392 
3393 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3394   VM_Exit::block_if_vm_exited();
3395   JVMWrapper("JVM_RawMonitorExit");
3396   ((os::PlatformMutex*) mon)->unlock();
3397 }
3398 
3399 
3400 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3401 
3402 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3403                                     Handle loader, Handle protection_domain,
3404                                     jboolean throwError, TRAPS) {
3405   // Security Note:
3406   //   The Java level wrapper will perform the necessary security check allowing
3407   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
3408   //   the checkPackageAccess relative to the initiating class loader via the
3409   //   protection_domain. The protection_domain is passed as NULL by the java code
3410   //   if there is no security manager in 3-arg Class.forName().
3411   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3412 
3413   // Check if we should initialize the class
3414   if (init && klass->is_instance_klass()) {
3415     klass->initialize(CHECK_NULL);
3416   }
3417   return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3418 }
3419 
3420 
3421 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3422 
3423 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3424   JVMWrapper("JVM_InvokeMethod");
3425   Handle method_handle;
3426   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3427     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3428     Handle receiver(THREAD, JNIHandles::resolve(obj));
3429     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3430     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3431     jobject res = JNIHandles::make_local(env, result);
3432     if (JvmtiExport::should_post_vm_object_alloc()) {
3433       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3434       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3435       if (java_lang_Class::is_primitive(ret_type)) {
3436         // Only for primitive type vm allocates memory for java object.
3437         // See box() method.
3438         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3439       }
3440     }
3441     return res;
3442   } else {
3443     THROW_0(vmSymbols::java_lang_StackOverflowError());
3444   }
3445 JVM_END
3446 
3447 
3448 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3449   JVMWrapper("JVM_NewInstanceFromConstructor");
3450   oop constructor_mirror = JNIHandles::resolve(c);
3451   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3452   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3453   jobject res = JNIHandles::make_local(env, result);
3454   if (JvmtiExport::should_post_vm_object_alloc()) {
3455     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3456   }
3457   return res;
3458 JVM_END
3459 
3460 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3461 
3462 JVM_LEAF(jboolean, JVM_SupportsCX8())
3463   JVMWrapper("JVM_SupportsCX8");
3464   return VM_Version::supports_cx8();
3465 JVM_END
3466 
3467 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3468   JVMWrapper("JVM_InitializeFromArchive");
3469   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3470   assert(k->is_klass(), "just checking");
3471   HeapShared::initialize_from_archived_subgraph(k);
3472 JVM_END
3473 
3474 // Returns an array of all live Thread objects (VM internal JavaThreads,
3475 // jvmti agent threads, and JNI attaching threads  are skipped)
3476 // See CR 6404306 regarding JNI attaching threads
3477 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3478   ResourceMark rm(THREAD);
3479   ThreadsListEnumerator tle(THREAD, false, false);
3480   JvmtiVMObjectAllocEventCollector oam;
3481 
3482   int num_threads = tle.num_threads();
3483   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3484   objArrayHandle threads_ah(THREAD, r);
3485 
3486   for (int i = 0; i < num_threads; i++) {
3487     Handle h = tle.get_threadObj(i);
3488     threads_ah->obj_at_put(i, h());
3489   }
3490 
3491   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3492 JVM_END
3493 
3494 
3495 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3496 // Return StackTraceElement[][], each element is the stack trace of a thread in
3497 // the corresponding entry in the given threads array
3498 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3499   JVMWrapper("JVM_DumpThreads");
3500   JvmtiVMObjectAllocEventCollector oam;
3501 
3502   // Check if threads is null
3503   if (threads == NULL) {
3504     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3505   }
3506 
3507   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3508   objArrayHandle ah(THREAD, a);
3509   int num_threads = ah->length();
3510   // check if threads is non-empty array
3511   if (num_threads == 0) {
3512     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3513   }
3514 
3515   // check if threads is not an array of objects of Thread class
3516   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3517   if (k != SystemDictionary::Thread_klass()) {
3518     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3519   }
3520 
3521   ResourceMark rm(THREAD);
3522 
3523   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3524   for (int i = 0; i < num_threads; i++) {
3525     oop thread_obj = ah->obj_at(i);
3526     instanceHandle h(THREAD, (instanceOop) thread_obj);
3527     thread_handle_array->append(h);
3528   }
3529 
3530   // The JavaThread references in thread_handle_array are validated
3531   // in VM_ThreadDump::doit().
3532   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3533   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3534 
3535 JVM_END
3536 
3537 // JVM monitoring and management support
3538 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3539   return Management::get_jmm_interface(version);
3540 JVM_END
3541 
3542 // com.sun.tools.attach.VirtualMachine agent properties support
3543 //
3544 // Initialize the agent properties with the properties maintained in the VM
3545 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3546   JVMWrapper("JVM_InitAgentProperties");
3547   ResourceMark rm;
3548 
3549   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3550 
3551   PUTPROP(props, "sun.java.command", Arguments::java_command());
3552   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3553   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3554   return properties;
3555 JVM_END
3556 
3557 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3558 {
3559   JVMWrapper("JVM_GetEnclosingMethodInfo");
3560   JvmtiVMObjectAllocEventCollector oam;
3561 
3562   if (ofClass == NULL) {
3563     return NULL;
3564   }
3565   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3566   // Special handling for primitive objects
3567   if (java_lang_Class::is_primitive(mirror())) {
3568     return NULL;
3569   }
3570   Klass* k = java_lang_Class::as_Klass(mirror());
3571   if (!k->is_instance_klass()) {
3572     return NULL;
3573   }
3574   InstanceKlass* ik = InstanceKlass::cast(k);
3575   int encl_method_class_idx = ik->enclosing_method_class_index();
3576   if (encl_method_class_idx == 0) {
3577     return NULL;
3578   }
3579   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3580   objArrayHandle dest(THREAD, dest_o);
3581   Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3582   dest->obj_at_put(0, enc_k->java_mirror());
3583   int encl_method_method_idx = ik->enclosing_method_method_index();
3584   if (encl_method_method_idx != 0) {
3585     Symbol* sym = ik->constants()->symbol_at(
3586                         extract_low_short_from_int(
3587                           ik->constants()->name_and_type_at(encl_method_method_idx)));
3588     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3589     dest->obj_at_put(1, str());
3590     sym = ik->constants()->symbol_at(
3591               extract_high_short_from_int(
3592                 ik->constants()->name_and_type_at(encl_method_method_idx)));
3593     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3594     dest->obj_at_put(2, str());
3595   }
3596   return (jobjectArray) JNIHandles::make_local(dest());
3597 }
3598 JVM_END
3599 
3600 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3601 {
3602   memset(info, 0, info_size);
3603 
3604   info->jvm_version = VM_Version::jvm_version();
3605   info->patch_version = VM_Version::vm_patch_version();
3606 
3607   // when we add a new capability in the jvm_version_info struct, we should also
3608   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3609   // counter defined in runtimeService.cpp.
3610   info->is_attach_supported = AttachListener::is_attach_supported();
3611 }
3612 JVM_END
3613 
3614 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3615 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3616   ResourceMark rm(THREAD);
3617 
3618   if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3619     return NULL;
3620   }
3621 
3622   char** vm_flags = Arguments::jvm_flags_array();
3623   char** vm_args = Arguments::jvm_args_array();
3624   int num_flags = Arguments::num_jvm_flags();
3625   int num_args = Arguments::num_jvm_args();
3626 
3627   InstanceKlass* ik = SystemDictionary::String_klass();
3628   objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3629   objArrayHandle result_h(THREAD, r);
3630 
3631   int index = 0;
3632   for (int j = 0; j < num_flags; j++, index++) {
3633     Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3634     result_h->obj_at_put(index, h());
3635   }
3636   for (int i = 0; i < num_args; i++, index++) {
3637     Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3638     result_h->obj_at_put(index, h());
3639   }
3640   return (jobjectArray) JNIHandles::make_local(env, result_h());
3641 JVM_END
3642 
3643 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3644   return os::get_signal_number(name);
3645 JVM_END