1 /*
   2  * Copyright (c) 1997, 2017, 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 "classfile/classFileStream.hpp"
  27 #include "classfile/classLoader.hpp"
  28 #include "classfile/classLoaderData.inline.hpp"
  29 #include "classfile/javaAssertions.hpp"
  30 #include "classfile/javaClasses.inline.hpp"
  31 #include "classfile/moduleEntry.hpp"
  32 #include "classfile/modules.hpp"
  33 #include "classfile/packageEntry.hpp"
  34 #include "classfile/stringTable.hpp"
  35 #include "classfile/systemDictionary.hpp"
  36 #include "classfile/vmSymbols.hpp"
  37 #include "gc/shared/barrierSet.inline.hpp"
  38 #include "gc/shared/collectedHeap.inline.hpp"
  39 #include "interpreter/bytecode.hpp"
  40 #include "memory/oopFactory.hpp"
  41 #include "memory/resourceArea.hpp"
  42 #include "memory/universe.inline.hpp"
  43 #include "oops/fieldStreams.hpp"
  44 #include "oops/instanceKlass.hpp"
  45 #include "oops/method.hpp"
  46 #include "oops/objArrayKlass.hpp"
  47 #include "oops/objArrayOop.inline.hpp"
  48 #include "oops/oop.inline.hpp"
  49 #include "prims/jvm.h"
  50 #include "prims/jvm_misc.hpp"
  51 #include "prims/jvmtiExport.hpp"
  52 #include "prims/jvmtiThreadState.hpp"
  53 #include "prims/nativeLookup.hpp"
  54 #include "prims/privilegedStack.hpp"
  55 #include "prims/stackwalk.hpp"
  56 #include "runtime/arguments.hpp"
  57 #include "runtime/atomic.hpp"
  58 #include "runtime/handles.inline.hpp"
  59 #include "runtime/init.hpp"
  60 #include "runtime/interfaceSupport.hpp"
  61 #include "runtime/java.hpp"
  62 #include "runtime/javaCalls.hpp"
  63 #include "runtime/jfieldIDWorkaround.hpp"
  64 #include "runtime/orderAccess.inline.hpp"
  65 #include "runtime/os.inline.hpp"
  66 #include "runtime/perfData.hpp"
  67 #include "runtime/reflection.hpp"
  68 #include "runtime/thread.inline.hpp"
  69 #include "runtime/vframe.hpp"
  70 #include "runtime/vm_operations.hpp"
  71 #include "runtime/vm_version.hpp"

  72 #include "services/attachListener.hpp"
  73 #include "services/management.hpp"
  74 #include "services/threadService.hpp"
  75 #include "trace/tracing.hpp"
  76 #include "utilities/copy.hpp"
  77 #include "utilities/defaultStream.hpp"
  78 #include "utilities/dtrace.hpp"
  79 #include "utilities/events.hpp"
  80 #include "utilities/histogram.hpp"
  81 #include "utilities/macros.hpp"
  82 #include "utilities/utf8.hpp"
  83 #if INCLUDE_CDS
  84 #include "classfile/sharedClassUtil.hpp"
  85 #include "classfile/systemDictionaryShared.hpp"
  86 #endif
  87 
  88 #include <errno.h>
  89 
  90 /*
  91   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
  92   such ctors and calls MUST NOT come between an oop declaration/init and its
  93   usage because if objects are move this may cause various memory stomps, bus
  94   errors and segfaults. Here is a cookbook for causing so called "naked oop
  95   failures":
  96 
  97       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
  98           JVMWrapper("JVM_GetClassDeclaredFields");
  99 
 100           // Object address to be held directly in mirror & not visible to GC
 101           oop mirror = JNIHandles::resolve_non_null(ofClass);
 102 
 103           // If this ctor can hit a safepoint, moving objects around, then
 104           ComplexConstructor foo;
 105 
 106           // Boom! mirror may point to JUNK instead of the intended object
 107           (some dereference of mirror)
 108 
 109           // Here's another call that may block for GC, making mirror stale
 110           MutexLocker ml(some_lock);
 111 
 112           // And here's an initializer that can result in a stale oop
 113           // all in one step.
 114           oop o = call_that_can_throw_exception(TRAPS);
 115 
 116 
 117   The solution is to keep the oop declaration BELOW the ctor or function
 118   call that might cause a GC, do another resolve to reassign the oop, or
 119   consider use of a Handle instead of an oop so there is immunity from object
 120   motion. But note that the "QUICK" entries below do not have a handlemark
 121   and thus can only support use of handles passed in.
 122 */
 123 
 124 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
 125   ResourceMark rm;
 126   int line_number = -1;
 127   const char * source_file = NULL;
 128   const char * trace = "explicit";
 129   InstanceKlass* caller = NULL;
 130   JavaThread* jthread = JavaThread::current();
 131   if (jthread->has_last_Java_frame()) {
 132     vframeStream vfst(jthread);
 133 
 134     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
 135     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
 136     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
 137     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
 138     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
 139 
 140     Method* last_caller = NULL;
 141 
 142     while (!vfst.at_end()) {
 143       Method* m = vfst.method();
 144       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
 145           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
 146           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
 147         break;
 148       }
 149       last_caller = m;
 150       vfst.next();
 151     }
 152     // if this is called from Class.forName0 and that is called from Class.forName,
 153     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 154     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 155     bool found_it = false;
 156     if (!vfst.at_end() &&
 157         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 158         vfst.method()->name() == vmSymbols::forName0_name()) {
 159       vfst.next();
 160       if (!vfst.at_end() &&
 161           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 162           vfst.method()->name() == vmSymbols::forName_name()) {
 163         vfst.next();
 164         found_it = true;
 165       }
 166     } else if (last_caller != NULL &&
 167                last_caller->method_holder()->name() ==
 168                vmSymbols::java_lang_ClassLoader() &&
 169                (last_caller->name() == vmSymbols::loadClassInternal_name() ||
 170                 last_caller->name() == vmSymbols::loadClass_name())) {
 171       found_it = true;
 172     } else if (!vfst.at_end()) {
 173       if (vfst.method()->is_native()) {
 174         // JNI call
 175         found_it = true;
 176       }
 177     }
 178     if (found_it && !vfst.at_end()) {
 179       // found the caller
 180       caller = vfst.method()->method_holder();
 181       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 182       if (line_number == -1) {
 183         // show method name if it's a native method
 184         trace = vfst.method()->name_and_sig_as_C_string();
 185       }
 186       Symbol* s = caller->source_file_name();
 187       if (s != NULL) {
 188         source_file = s->as_C_string();
 189       }
 190     }
 191   }
 192   if (caller != NULL) {
 193     if (to_class != caller) {
 194       const char * from = caller->external_name();
 195       const char * to = to_class->external_name();
 196       // print in a single call to reduce interleaving between threads
 197       if (source_file != NULL) {
 198         log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
 199       } else {
 200         log_debug(class, resolve)("%s %s (%s)", from, to, trace);
 201       }
 202     }
 203   }
 204 }
 205 
 206 void trace_class_resolution(Klass* to_class) {
 207   EXCEPTION_MARK;
 208   trace_class_resolution_impl(to_class, THREAD);
 209   if (HAS_PENDING_EXCEPTION) {
 210     CLEAR_PENDING_EXCEPTION;
 211   }
 212 }
 213 
 214 // Wrapper to trace JVM functions
 215 
 216 #ifdef ASSERT
 217   Histogram* JVMHistogram;
 218   volatile jint JVMHistogram_lock = 0;
 219 
 220   class JVMHistogramElement : public HistogramElement {
 221     public:
 222      JVMHistogramElement(const char* name);
 223   };
 224 
 225   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
 226     _name = elementName;
 227     uintx count = 0;
 228 
 229     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
 230       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
 231         count +=1;
 232         if ( (WarnOnStalledSpinLock > 0)
 233           && (count % WarnOnStalledSpinLock == 0)) {
 234           warning("JVMHistogram_lock seems to be stalled");
 235         }
 236       }
 237      }
 238 
 239     if(JVMHistogram == NULL)
 240       JVMHistogram = new Histogram("JVM Call Counts",100);
 241 
 242     JVMHistogram->add_element(this);
 243     Atomic::dec(&JVMHistogram_lock);
 244   }
 245 
 246   #define JVMCountWrapper(arg) \
 247       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
 248       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
 249 
 250   #define JVMWrapper(arg) JVMCountWrapper(arg);
 251 #else
 252   #define JVMWrapper(arg)
 253 #endif
 254 
 255 
 256 // Interface version /////////////////////////////////////////////////////////////////////
 257 
 258 
 259 JVM_LEAF(jint, JVM_GetInterfaceVersion())
 260   return JVM_INTERFACE_VERSION;
 261 JVM_END
 262 
 263 
 264 // java.lang.System //////////////////////////////////////////////////////////////////////
 265 
 266 
 267 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 268   JVMWrapper("JVM_CurrentTimeMillis");
 269   return os::javaTimeMillis();
 270 JVM_END
 271 
 272 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
 273   JVMWrapper("JVM_NanoTime");
 274   return os::javaTimeNanos();
 275 JVM_END
 276 
 277 // The function below is actually exposed by jdk.internal.misc.VM and not
 278 // java.lang.System, but we choose to keep it here so that it stays next
 279 // to JVM_CurrentTimeMillis and JVM_NanoTime
 280 
 281 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); //  2^32
 282 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
 283 
 284 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
 285   JVMWrapper("JVM_GetNanoTimeAdjustment");
 286   jlong seconds;
 287   jlong nanos;
 288 
 289   os::javaTimeSystemUTC(seconds, nanos);
 290 
 291   // We're going to verify that the result can fit in a long.
 292   // For that we need the difference in seconds between 'seconds'
 293   // and 'offset_secs' to be such that:
 294   //     |seconds - offset_secs| < (2^63/10^9)
 295   // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
 296   // which makes |seconds - offset_secs| < 2^33
 297   // and we will prefer +/- 2^32 as the maximum acceptable diff
 298   // as 2^32 has a more natural feel than 2^33...
 299   //
 300   // So if |seconds - offset_secs| >= 2^32 - we return a special
 301   // sentinel value (-1) which the caller should take as an
 302   // exception value indicating that the offset given to us is
 303   // too far from range of the current time - leading to too big
 304   // a nano adjustment. The caller is expected to recover by
 305   // computing a more accurate offset and calling this method
 306   // again. (For the record 2^32 secs is ~136 years, so that
 307   // should rarely happen)
 308   //
 309   jlong diff = seconds - offset_secs;
 310   if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
 311      return -1; // sentinel value: the offset is too far off the target
 312   }
 313 
 314   // return the adjustment. If you compute a time by adding
 315   // this number of nanoseconds along with the number of seconds
 316   // in the offset you should get the current UTC time.
 317   return (diff * (jlong)1000000000) + nanos;
 318 JVM_END
 319 
 320 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 321                                jobject dst, jint dst_pos, jint length))
 322   JVMWrapper("JVM_ArrayCopy");
 323   // Check if we have null pointers
 324   if (src == NULL || dst == NULL) {
 325     THROW(vmSymbols::java_lang_NullPointerException());
 326   }
 327   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 328   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 329   assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
 330   assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
 331   // Do copy
 332   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 333 JVM_END
 334 
 335 
 336 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 337   JavaValue r(T_OBJECT);
 338   // public synchronized Object put(Object key, Object value);
 339   HandleMark hm(THREAD);
 340   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 341   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
 342   JavaCalls::call_virtual(&r,
 343                           props,
 344                           SystemDictionary::Properties_klass(),
 345                           vmSymbols::put_name(),
 346                           vmSymbols::object_object_object_signature(),
 347                           key_str,
 348                           value_str,
 349                           THREAD);
 350 }
 351 
 352 
 353 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 354 
 355 
 356 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
 357   JVMWrapper("JVM_InitProperties");
 358   ResourceMark rm;
 359 
 360   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
 361 
 362   // System property list includes both user set via -D option and
 363   // jvm system specific properties.
 364   for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
 365     PUTPROP(props, p->key(), p->value());
 366   }
 367 
 368   // Convert the -XX:MaxDirectMemorySize= command line flag
 369   // to the sun.nio.MaxDirectMemorySize property.
 370   // Do this after setting user properties to prevent people
 371   // from setting the value with a -D option, as requested.
 372   {
 373     if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 374       PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
 375     } else {
 376       char as_chars[256];
 377       jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
 378       PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
 379     }
 380   }
 381 
 382   // JVM monitoring and management support
 383   // Add the sun.management.compiler property for the compiler's name
 384   {
 385 #undef CSIZE
 386 #if defined(_LP64) || defined(_WIN64)
 387   #define CSIZE "64-Bit "
 388 #else
 389   #define CSIZE
 390 #endif // 64bit
 391 
 392 #ifdef TIERED
 393     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 394 #else
 395 #if defined(COMPILER1)
 396     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 397 #elif defined(COMPILER2)
 398     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 399 #elif INCLUDE_JVMCI
 400     #error "INCLUDE_JVMCI should imply TIERED"
 401 #else
 402     const char* compiler_name = "";
 403 #endif // compilers
 404 #endif // TIERED
 405 
 406     if (*compiler_name != '\0' &&
 407         (Arguments::mode() != Arguments::_int)) {
 408       PUTPROP(props, "sun.management.compiler", compiler_name);
 409     }
 410   }
 411 
 412   return properties;
 413 JVM_END
 414 
 415 
 416 /*
 417  * Return the temporary directory that the VM uses for the attach
 418  * and perf data files.
 419  *
 420  * It is important that this directory is well-known and the
 421  * same for all VM instances. It cannot be affected by configuration
 422  * variables such as java.io.tmpdir.
 423  */
 424 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
 425   JVMWrapper("JVM_GetTemporaryDirectory");
 426   HandleMark hm(THREAD);
 427   const char* temp_dir = os::get_temp_directory();
 428   Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
 429   return (jstring) JNIHandles::make_local(env, h());
 430 JVM_END
 431 
 432 
 433 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 434 
 435 extern volatile jint vm_created;
 436 
 437 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
 438   before_exit(thread);
 439   vm_exit(code);
 440 JVM_END
 441 
 442 
 443 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
 444   JVMWrapper("JVM_GC");
 445   if (!DisableExplicitGC) {
 446     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 447   }
 448 JVM_END
 449 
 450 
 451 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
 452   JVMWrapper("JVM_MaxObjectInspectionAge");
 453   return Universe::heap()->millis_since_last_gc();
 454 JVM_END
 455 
 456 
 457 static inline jlong convert_size_t_to_jlong(size_t val) {
 458   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 459   NOT_LP64 (return (jlong)val;)
 460   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 461 }
 462 
 463 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
 464   JVMWrapper("JVM_TotalMemory");
 465   size_t n = Universe::heap()->capacity();
 466   return convert_size_t_to_jlong(n);
 467 JVM_END
 468 
 469 
 470 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
 471   JVMWrapper("JVM_FreeMemory");
 472   CollectedHeap* ch = Universe::heap();
 473   size_t n;
 474   {
 475      MutexLocker x(Heap_lock);
 476      n = ch->capacity() - ch->used();
 477   }
 478   return convert_size_t_to_jlong(n);
 479 JVM_END
 480 
 481 
 482 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
 483   JVMWrapper("JVM_MaxMemory");
 484   size_t n = Universe::heap()->max_capacity();
 485   return convert_size_t_to_jlong(n);
 486 JVM_END
 487 
 488 
 489 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
 490   JVMWrapper("JVM_ActiveProcessorCount");
 491   return os::active_processor_count();
 492 JVM_END
 493 
 494 
 495 
 496 // java.lang.Throwable //////////////////////////////////////////////////////
 497 
 498 
 499 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
 500   JVMWrapper("JVM_FillInStackTrace");
 501   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
 502   java_lang_Throwable::fill_in_stack_trace(exception);
 503 JVM_END
 504 
 505 
 506 // java.lang.StackTraceElement //////////////////////////////////////////////
 507 
 508 
 509 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
 510   JVMWrapper("JVM_InitStackTraceElementArray");
 511   Handle exception(THREAD, JNIHandles::resolve(throwable));
 512   objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
 513   objArrayHandle stack_trace(THREAD, st);
 514   // Fill in the allocated stack trace
 515   java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
 516 JVM_END
 517 
 518 
 519 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
 520   JVMWrapper("JVM_InitStackTraceElement");
 521   Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
 522   Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
 523   java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
 524 JVM_END
 525 
 526 
 527 // java.lang.StackWalker //////////////////////////////////////////////////////
 528 
 529 
 530 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
 531                                      jint skip_frames, jint frame_count, jint start_index,
 532                                      jobjectArray frames))
 533   JVMWrapper("JVM_CallStackWalk");
 534   JavaThread* jt = (JavaThread*) THREAD;
 535   if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
 536     THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
 537   }
 538 
 539   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 540 
 541   // frames array is a Class<?>[] array when only getting caller reference,
 542   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 543   // be null.
 544   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 545   objArrayHandle frames_array_h(THREAD, fa);
 546 
 547   int limit = start_index + frame_count;
 548   if (frames_array_h->length() < limit) {
 549     THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
 550   }
 551 
 552   oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
 553                                start_index, frames_array_h, CHECK_NULL);
 554   return JNIHandles::make_local(env, result);
 555 JVM_END
 556 
 557 
 558 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
 559                                   jint frame_count, jint start_index,
 560                                   jobjectArray frames))
 561   JVMWrapper("JVM_MoreStackWalk");
 562   JavaThread* jt = (JavaThread*) THREAD;
 563 
 564   // frames array is a Class<?>[] array when only getting caller reference,
 565   // and a StackFrameInfo[] array (or derivative) otherwise. It should never
 566   // be null.
 567   objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
 568   objArrayHandle frames_array_h(THREAD, fa);
 569 
 570   int limit = start_index+frame_count;
 571   if (frames_array_h->length() < limit) {
 572     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
 573   }
 574 
 575   Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
 576   return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
 577                                    start_index, frames_array_h, THREAD);
 578 JVM_END
 579 






 580 // java.lang.Object ///////////////////////////////////////////////
 581 
 582 
 583 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 584   JVMWrapper("JVM_IHashCode");
 585   // as implemented in the classic virtual machine; return 0 if object is NULL
 586   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 587 JVM_END
 588 
 589 
 590 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 591   JVMWrapper("JVM_MonitorWait");
 592   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 593   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 594   if (JvmtiExport::should_post_monitor_wait()) {
 595     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 596 
 597     // The current thread already owns the monitor and it has not yet
 598     // been added to the wait queue so the current thread cannot be
 599     // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
 600     // event handler cannot accidentally consume an unpark() meant for
 601     // the ParkEvent associated with this ObjectMonitor.
 602   }
 603   ObjectSynchronizer::wait(obj, ms, CHECK);
 604 JVM_END
 605 
 606 
 607 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 608   JVMWrapper("JVM_MonitorNotify");
 609   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 610   ObjectSynchronizer::notify(obj, CHECK);
 611 JVM_END
 612 
 613 
 614 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 615   JVMWrapper("JVM_MonitorNotifyAll");
 616   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 617   ObjectSynchronizer::notifyall(obj, CHECK);
 618 JVM_END
 619 
 620 
 621 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 622   JVMWrapper("JVM_Clone");
 623   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 624   Klass* klass = obj->klass();
 625   JvmtiVMObjectAllocEventCollector oam;
 626 
 627 #ifdef ASSERT
 628   // Just checking that the cloneable flag is set correct
 629   if (obj->is_array()) {
 630     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 631   } else {
 632     guarantee(obj->is_instance(), "should be instanceOop");
 633     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 634     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 635   }
 636 #endif
 637 
 638   // Check if class of obj supports the Cloneable interface.
 639   // All arrays are considered to be cloneable (See JLS 20.1.5)
 640   if (!klass->is_cloneable()) {
 641     ResourceMark rm(THREAD);
 642     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 643   }
 644 
 645   // Make shallow object copy
 646   const int size = obj->size();
 647   oop new_obj_oop = NULL;
 648   if (obj->is_array()) {
 649     const int length = ((arrayOop)obj())->length();
 650     new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
 651   } else {
 652     new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
 653   }
 654 
 655   // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
 656   // is modifying a reference field in the clonee, a non-oop-atomic copy might
 657   // be suspended in the middle of copying the pointer and end up with parts
 658   // of two different pointers in the field.  Subsequent dereferences will crash.
 659   // 4846409: an oop-copy of objects with long or double fields or arrays of same
 660   // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
 661   // of oops.  We know objects are aligned on a minimum of an jlong boundary.
 662   // The same is true of StubRoutines::object_copy and the various oop_copy
 663   // variants, and of the code generated by the inline_native_clone intrinsic.
 664   assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
 665   Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
 666                                align_object_size(size) / HeapWordsPerLong);
 667   // Clear the header
 668   new_obj_oop->init_mark();
 669 
 670   // Store check (mark entire object and let gc sort it out)
 671   BarrierSet* bs = Universe::heap()->barrier_set();
 672   assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
 673   bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
 674 
 675   Handle new_obj(THREAD, new_obj_oop);
 676   // Caution: this involves a java upcall, so the clone should be
 677   // "gc-robust" by this stage.
 678   if (klass->has_finalizer()) {
 679     assert(obj->is_instance(), "should be instanceOop");
 680     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
 681     new_obj = Handle(THREAD, new_obj_oop);
 682   }
 683 
 684   return JNIHandles::make_local(env, new_obj());
 685 JVM_END
 686 
 687 // java.io.File ///////////////////////////////////////////////////////////////
 688 
 689 JVM_LEAF(char*, JVM_NativePath(char* path))
 690   JVMWrapper("JVM_NativePath");
 691   return os::native_path(path);
 692 JVM_END
 693 
 694 
 695 // Misc. class handling ///////////////////////////////////////////////////////////
 696 
 697 
 698 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
 699   JVMWrapper("JVM_GetCallerClass");
 700 
 701   // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
 702   // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
 703   // temporarily for existing code to use until a replacement API is defined.
 704   if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
 705     Klass* k = thread->security_get_caller_class(depth);
 706     return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
 707   }
 708 
 709   // Getting the class of the caller frame.
 710   //
 711   // The call stack at this point looks something like this:
 712   //
 713   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 714   // [1] [ @CallerSensitive API.method                                   ]
 715   // [.] [ (skipped intermediate frames)                                 ]
 716   // [n] [ caller                                                        ]
 717   vframeStream vfst(thread);
 718   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 719   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 720     Method* m = vfst.method();
 721     assert(m != NULL, "sanity");
 722     switch (n) {
 723     case 0:
 724       // This must only be called from Reflection.getCallerClass
 725       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 726         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 727       }
 728       // fall-through
 729     case 1:
 730       // Frame 0 and 1 must be caller sensitive.
 731       if (!m->caller_sensitive()) {
 732         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 733       }
 734       break;
 735     default:
 736       if (!m->is_ignored_by_security_stack_walk()) {
 737         // We have reached the desired frame; return the holder class.
 738         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 739       }
 740       break;
 741     }
 742   }
 743   return NULL;
 744 JVM_END
 745 
 746 
 747 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 748   JVMWrapper("JVM_FindPrimitiveClass");
 749   oop mirror = NULL;
 750   BasicType t = name2type(utf);
 751   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
 752     mirror = Universe::java_mirror(t);
 753   }
 754   if (mirror == NULL) {
 755     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 756   } else {
 757     return (jclass) JNIHandles::make_local(env, mirror);
 758   }
 759 JVM_END
 760 
 761 
 762 // Returns a class loaded by the bootstrap class loader; or null
 763 // if not found.  ClassNotFoundException is not thrown.
 764 // FindClassFromBootLoader is exported to the launcher for windows.
 765 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 766                                               const char* name))
 767   JVMWrapper("JVM_FindClassFromBootLoader");
 768 
 769   // Java libraries should ensure that name is never null...
 770   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 771     // It's impossible to create this class;  the name cannot fit
 772     // into the constant pool.
 773     return NULL;
 774   }
 775 
 776   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 777   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 778   if (k == NULL) {
 779     return NULL;
 780   }
 781 
 782   if (log_is_enabled(Debug, class, resolve)) {
 783     trace_class_resolution(k);
 784   }
 785   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 786 JVM_END
 787 
 788 // Find a class with this name in this loader, using the caller's protection domain.
 789 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
 790                                           jboolean init, jobject loader,
 791                                           jclass caller))
 792   JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
 793   // Java libraries should ensure that name is never null...
 794   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 795     // It's impossible to create this class;  the name cannot fit
 796     // into the constant pool.
 797     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 798   }
 799 
 800   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 801 
 802   oop loader_oop = JNIHandles::resolve(loader);
 803   oop from_class = JNIHandles::resolve(caller);
 804   oop protection_domain = NULL;
 805   // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
 806   // NPE. Put it in another way, the bootstrap class loader has all permission and
 807   // thus no checkPackageAccess equivalence in the VM class loader.
 808   // The caller is also passed as NULL by the java code if there is no security
 809   // manager to avoid the performance cost of getting the calling class.
 810   if (from_class != NULL && loader_oop != NULL) {
 811     protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
 812   }
 813 
 814   Handle h_loader(THREAD, loader_oop);
 815   Handle h_prot(THREAD, protection_domain);
 816   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 817                                                h_prot, false, THREAD);
 818 
 819   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 820     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 821   }
 822   return result;
 823 JVM_END
 824 
 825 // Currently only called from the old verifier.
 826 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 827                                          jboolean init, jclass from))
 828   JVMWrapper("JVM_FindClassFromClass");
 829   if (name == NULL) {
 830     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 831   }
 832   if ((int)strlen(name) > Symbol::max_length()) {
 833     // It's impossible to create this class;  the name cannot fit
 834     // into the constant pool.
 835     Exceptions::fthrow(THREAD_AND_LOCATION,
 836                        vmSymbols::java_lang_NoClassDefFoundError(),
 837                        "Class name exceeds maximum length of %d: %s",
 838                        Symbol::max_length(),
 839                        name);
 840     return 0;
 841   }
 842   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 843   oop from_class_oop = JNIHandles::resolve(from);
 844   Klass* from_class = (from_class_oop == NULL)
 845                            ? (Klass*)NULL
 846                            : java_lang_Class::as_Klass(from_class_oop);
 847   oop class_loader = NULL;
 848   oop protection_domain = NULL;
 849   if (from_class != NULL) {
 850     class_loader = from_class->class_loader();
 851     protection_domain = from_class->protection_domain();
 852   }
 853   Handle h_loader(THREAD, class_loader);
 854   Handle h_prot  (THREAD, protection_domain);
 855   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 856                                                h_prot, true, thread);
 857 
 858   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 859     // this function is generally only used for class loading during verification.
 860     ResourceMark rm;
 861     oop from_mirror = JNIHandles::resolve_non_null(from);
 862     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 863     const char * from_name = from_class->external_name();
 864 
 865     oop mirror = JNIHandles::resolve_non_null(result);
 866     Klass* to_class = java_lang_Class::as_Klass(mirror);
 867     const char * to = to_class->external_name();
 868     log_debug(class, resolve)("%s %s (verification)", from_name, to);
 869   }
 870 
 871   return result;
 872 JVM_END
 873 
 874 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 875   if (loader.is_null()) {
 876     return;
 877   }
 878 
 879   // check whether the current caller thread holds the lock or not.
 880   // If not, increment the corresponding counter
 881   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 882       ObjectSynchronizer::owner_self) {
 883     counter->inc();
 884   }
 885 }
 886 
 887 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 888 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 889                                       jobject loader, const jbyte *buf,
 890                                       jsize len, jobject pd, const char *source,
 891                                       TRAPS) {
 892   if (source == NULL)  source = "__JVM_DefineClass__";
 893 
 894   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 895   JavaThread* jt = (JavaThread*) THREAD;
 896 
 897   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 898                              ClassLoader::perf_define_appclass_selftime(),
 899                              ClassLoader::perf_define_appclasses(),
 900                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 901                              jt->get_thread_stat()->perf_timers_addr(),
 902                              PerfClassTraceTime::DEFINE_CLASS);
 903 
 904   if (UsePerfData) {
 905     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 906   }
 907 
 908   // Since exceptions can be thrown, class initialization can take place
 909   // if name is NULL no check for class name in .class stream has to be made.
 910   TempNewSymbol class_name = NULL;
 911   if (name != NULL) {
 912     const int str_len = (int)strlen(name);
 913     if (str_len > Symbol::max_length()) {
 914       // It's impossible to create this class;  the name cannot fit
 915       // into the constant pool.
 916       Exceptions::fthrow(THREAD_AND_LOCATION,
 917                          vmSymbols::java_lang_NoClassDefFoundError(),
 918                          "Class name exceeds maximum length of %d: %s",
 919                          Symbol::max_length(),
 920                          name);
 921       return 0;
 922     }
 923     class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
 924   }
 925 
 926   ResourceMark rm(THREAD);
 927   ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
 928   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 929   if (UsePerfData) {
 930     is_lock_held_by_thread(class_loader,
 931                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
 932                            THREAD);
 933   }
 934   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 935   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 936                                                    class_loader,
 937                                                    protection_domain,
 938                                                    &st,
 939                                                    CHECK_NULL);
 940 
 941   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 942     trace_class_resolution(k);
 943   }
 944 
 945   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 946 }
 947 
 948 
 949 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
 950   JVMWrapper("JVM_DefineClass");
 951 
 952   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
 953 JVM_END
 954 
 955 
 956 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
 957   JVMWrapper("JVM_DefineClassWithSource");
 958 
 959   return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
 960 JVM_END
 961 
 962 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
 963   JVMWrapper("JVM_FindLoadedClass");
 964   ResourceMark rm(THREAD);
 965 
 966   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
 967   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
 968 
 969   const char* str   = java_lang_String::as_utf8_string(string());
 970   // Sanity check, don't expect null
 971   if (str == NULL) return NULL;
 972 
 973   const int str_len = (int)strlen(str);
 974   if (str_len > Symbol::max_length()) {
 975     // It's impossible to create this class;  the name cannot fit
 976     // into the constant pool.
 977     return NULL;
 978   }
 979   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
 980 
 981   // Security Note:
 982   //   The Java level wrapper will perform the necessary security check allowing
 983   //   us to pass the NULL as the initiating class loader.
 984   Handle h_loader(THREAD, JNIHandles::resolve(loader));
 985   if (UsePerfData) {
 986     is_lock_held_by_thread(h_loader,
 987                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
 988                            THREAD);
 989   }
 990 
 991   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
 992                                                               h_loader,
 993                                                               Handle(),
 994                                                               CHECK_NULL);
 995 #if INCLUDE_CDS
 996   if (k == NULL) {
 997     // If the class is not already loaded, try to see if it's in the shared
 998     // archive for the current classloader (h_loader).
 999     k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1000   }
1001 #endif
1002   return (k == NULL) ? NULL :
1003             (jclass) JNIHandles::make_local(env, k->java_mirror());
1004 JVM_END
1005 
1006 // Module support //////////////////////////////////////////////////////////////////////////////
1007 
1008 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1009                                  jstring location, const char* const* packages, jsize num_packages))
1010   JVMWrapper("JVM_DefineModule");
1011   Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1012 JVM_END
1013 
1014 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1015   JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1016   Modules::set_bootloader_unnamed_module(module, CHECK);
1017 JVM_END
1018 
1019 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1020   JVMWrapper("JVM_AddModuleExports");
1021   Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1022 JVM_END
1023 
1024 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1025   JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1026   Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1027 JVM_END
1028 
1029 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1030   JVMWrapper("JVM_AddModuleExportsToAll");
1031   Modules::add_module_exports(from_module, package, NULL, CHECK);
1032 JVM_END
1033 
1034 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1035   JVMWrapper("JVM_AddReadsModule");
1036   Modules::add_reads_module(from_module, source_module, CHECK);
1037 JVM_END
1038 
1039 // Reflection support //////////////////////////////////////////////////////////////////////////////
1040 
1041 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1042   assert (cls != NULL, "illegal class");
1043   JVMWrapper("JVM_GetClassName");
1044   JvmtiVMObjectAllocEventCollector oam;
1045   ResourceMark rm(THREAD);
1046   const char* name;
1047   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1048     name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1049   } else {
1050     // Consider caching interned string in Klass
1051     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1052     assert(k->is_klass(), "just checking");
1053     name = k->external_name();
1054   }
1055   oop result = StringTable::intern((char*) name, CHECK_NULL);
1056   return (jstring) JNIHandles::make_local(env, result);
1057 JVM_END
1058 
1059 
1060 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1061   JVMWrapper("JVM_GetClassInterfaces");
1062   JvmtiVMObjectAllocEventCollector oam;
1063   oop mirror = JNIHandles::resolve_non_null(cls);
1064 
1065   // Special handling for primitive objects
1066   if (java_lang_Class::is_primitive(mirror)) {
1067     // Primitive objects does not have any interfaces
1068     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1069     return (jobjectArray) JNIHandles::make_local(env, r);
1070   }
1071 
1072   Klass* klass = java_lang_Class::as_Klass(mirror);
1073   // Figure size of result array
1074   int size;
1075   if (klass->is_instance_klass()) {
1076     size = InstanceKlass::cast(klass)->local_interfaces()->length();
1077   } else {
1078     assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1079     size = 2;
1080   }
1081 
1082   // Allocate result array
1083   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1084   objArrayHandle result (THREAD, r);
1085   // Fill in result
1086   if (klass->is_instance_klass()) {
1087     // Regular instance klass, fill in all local interfaces
1088     for (int index = 0; index < size; index++) {
1089       Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1090       result->obj_at_put(index, k->java_mirror());
1091     }
1092   } else {
1093     // All arrays implement java.lang.Cloneable and java.io.Serializable
1094     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1095     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1096   }
1097   return (jobjectArray) JNIHandles::make_local(env, result());
1098 JVM_END
1099 
1100 
1101 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1102   JVMWrapper("JVM_IsInterface");
1103   oop mirror = JNIHandles::resolve_non_null(cls);
1104   if (java_lang_Class::is_primitive(mirror)) {
1105     return JNI_FALSE;
1106   }
1107   Klass* k = java_lang_Class::as_Klass(mirror);
1108   jboolean result = k->is_interface();
1109   assert(!result || k->is_instance_klass(),
1110          "all interfaces are instance types");
1111   // The compiler intrinsic for isInterface tests the
1112   // Klass::_access_flags bits in the same way.
1113   return result;
1114 JVM_END
1115 
1116 
1117 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1118   JVMWrapper("JVM_GetClassSigners");
1119   JvmtiVMObjectAllocEventCollector oam;
1120   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1121     // There are no signers for primitive types
1122     return NULL;
1123   }
1124 
1125   objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1126 
1127   // If there are no signers set in the class, or if the class
1128   // is an array, return NULL.
1129   if (signers == NULL) return NULL;
1130 
1131   // copy of the signers array
1132   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1133   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1134   for (int index = 0; index < signers->length(); index++) {
1135     signers_copy->obj_at_put(index, signers->obj_at(index));
1136   }
1137 
1138   // return the copy
1139   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1140 JVM_END
1141 
1142 
1143 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1144   JVMWrapper("JVM_SetClassSigners");
1145   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1146     // This call is ignored for primitive types and arrays.
1147     // Signers are only set once, ClassLoader.java, and thus shouldn't
1148     // be called with an array.  Only the bootstrap loader creates arrays.
1149     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1150     if (k->is_instance_klass()) {
1151       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1152     }
1153   }
1154 JVM_END
1155 
1156 
1157 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1158   JVMWrapper("JVM_GetProtectionDomain");
1159   if (JNIHandles::resolve(cls) == NULL) {
1160     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1161   }
1162 
1163   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1164     // Primitive types does not have a protection domain.
1165     return NULL;
1166   }
1167 
1168   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1169   return (jobject) JNIHandles::make_local(env, pd);
1170 JVM_END
1171 
1172 
1173 static bool is_authorized(Handle context, InstanceKlass* klass, TRAPS) {
1174   // If there is a security manager and protection domain, check the access
1175   // in the protection domain, otherwise it is authorized.
1176   if (java_lang_System::has_security_manager()) {
1177 
1178     // For bootstrapping, if pd implies method isn't in the JDK, allow
1179     // this context to revert to older behavior.
1180     // In this case the isAuthorized field in AccessControlContext is also not
1181     // present.
1182     if (Universe::protection_domain_implies_method() == NULL) {
1183       return true;
1184     }
1185 
1186     // Whitelist certain access control contexts
1187     if (java_security_AccessControlContext::is_authorized(context)) {
1188       return true;
1189     }
1190 
1191     oop prot = klass->protection_domain();
1192     if (prot != NULL) {
1193       // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1194       // in the new wrapper.
1195       methodHandle m(THREAD, Universe::protection_domain_implies_method());
1196       Handle h_prot(THREAD, prot);
1197       JavaValue result(T_BOOLEAN);
1198       JavaCallArguments args(h_prot);
1199       JavaCalls::call(&result, m, &args, CHECK_false);
1200       return (result.get_jboolean() != 0);
1201     }
1202   }
1203   return true;
1204 }
1205 
1206 // Create an AccessControlContext with a protection domain with null codesource
1207 // and null permissions - which gives no permissions.
1208 oop create_dummy_access_control_context(TRAPS) {
1209   InstanceKlass* pd_klass = SystemDictionary::ProtectionDomain_klass();
1210   Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1211   // Call constructor ProtectionDomain(null, null);
1212   JavaValue result(T_VOID);
1213   JavaCalls::call_special(&result, obj, pd_klass,
1214                           vmSymbols::object_initializer_name(),
1215                           vmSymbols::codesource_permissioncollection_signature(),
1216                           Handle(), Handle(), CHECK_NULL);
1217 
1218   // new ProtectionDomain[] {pd};
1219   objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1220   context->obj_at_put(0, obj());
1221 
1222   // new AccessControlContext(new ProtectionDomain[] {pd})
1223   objArrayHandle h_context(THREAD, context);
1224   oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1225   return acc;
1226 }
1227 
1228 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1229   JVMWrapper("JVM_DoPrivileged");
1230 
1231   if (action == NULL) {
1232     THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1233   }
1234 
1235   // Compute the frame initiating the do privileged operation and setup the privileged stack
1236   vframeStream vfst(thread);
1237   vfst.security_get_caller_frame(1);
1238 
1239   if (vfst.at_end()) {
1240     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1241   }
1242 
1243   Method* method        = vfst.method();
1244   InstanceKlass* klass  = method->method_holder();
1245 
1246   // Check that action object understands "Object run()"
1247   Handle h_context;
1248   if (context != NULL) {
1249     h_context = Handle(THREAD, JNIHandles::resolve(context));
1250     bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1251     if (!authorized) {
1252       // Create an unprivileged access control object and call it's run function
1253       // instead.
1254       oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1255       h_context = Handle(THREAD, noprivs);
1256     }
1257   }
1258 
1259   // Check that action object understands "Object run()"
1260   Handle object (THREAD, JNIHandles::resolve(action));
1261 
1262   // get run() method
1263   Method* m_oop = object->klass()->uncached_lookup_method(
1264                                            vmSymbols::run_method_name(),
1265                                            vmSymbols::void_object_signature(),
1266                                            Klass::find_overpass);
1267 
1268   // See if there is a default method for "Object run()".
1269   if (m_oop == NULL && object->klass()->is_instance_klass()) {
1270     InstanceKlass* iklass = InstanceKlass::cast(object->klass());
1271     m_oop = iklass->lookup_method_in_ordered_interfaces(
1272                                            vmSymbols::run_method_name(),
1273                                            vmSymbols::void_object_signature());
1274   }
1275 
1276   methodHandle m (THREAD, m_oop);
1277   if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static() || m()->is_abstract()) {
1278     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1279   }
1280 
1281   // Stack allocated list of privileged stack elements
1282   PrivilegedElement pi;
1283   if (!vfst.at_end()) {
1284     pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1285     thread->set_privileged_stack_top(&pi);
1286   }
1287 
1288 
1289   // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1290   // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1291   Handle pending_exception;
1292   JavaValue result(T_OBJECT);
1293   JavaCallArguments args(object);
1294   JavaCalls::call(&result, m, &args, THREAD);
1295 
1296   // done with action, remove ourselves from the list
1297   if (!vfst.at_end()) {
1298     assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1299     thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1300   }
1301 
1302   if (HAS_PENDING_EXCEPTION) {
1303     pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1304     CLEAR_PENDING_EXCEPTION;
1305     // JVMTI has already reported the pending exception
1306     // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1307     if (THREAD->is_Java_thread()) {
1308       JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1309     }
1310     if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1311         !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1312       // Throw a java.security.PrivilegedActionException(Exception e) exception
1313       JavaCallArguments args(pending_exception);
1314       THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1315                   vmSymbols::exception_void_signature(),
1316                   &args);
1317     }
1318   }
1319 
1320   if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1321   return JNIHandles::make_local(env, (oop) result.get_jobject());
1322 JVM_END
1323 
1324 
1325 // Returns the inherited_access_control_context field of the running thread.
1326 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1327   JVMWrapper("JVM_GetInheritedAccessControlContext");
1328   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1329   return JNIHandles::make_local(env, result);
1330 JVM_END
1331 
1332 class RegisterArrayForGC {
1333  private:
1334   JavaThread *_thread;
1335  public:
1336   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1337     _thread = thread;
1338     _thread->register_array_for_gc(array);
1339   }
1340 
1341   ~RegisterArrayForGC() {
1342     _thread->register_array_for_gc(NULL);
1343   }
1344 };
1345 
1346 
1347 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1348   JVMWrapper("JVM_GetStackAccessControlContext");
1349   if (!UsePrivilegedStack) return NULL;
1350 
1351   ResourceMark rm(THREAD);
1352   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1353   JvmtiVMObjectAllocEventCollector oam;
1354 
1355   // count the protection domains on the execution stack. We collapse
1356   // duplicate consecutive protection domains into a single one, as
1357   // well as stopping when we hit a privileged frame.
1358 
1359   // Use vframeStream to iterate through Java frames
1360   vframeStream vfst(thread);
1361 
1362   oop previous_protection_domain = NULL;
1363   Handle privileged_context(thread, NULL);
1364   bool is_privileged = false;
1365   oop protection_domain = NULL;
1366 
1367   for(; !vfst.at_end(); vfst.next()) {
1368     // get method of frame
1369     Method* method = vfst.method();
1370     intptr_t* frame_id   = vfst.frame_id();
1371 
1372     // check the privileged frames to see if we have a match
1373     if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1374       // this frame is privileged
1375       is_privileged = true;
1376       privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1377       protection_domain  = thread->privileged_stack_top()->protection_domain();
1378     } else {
1379       protection_domain = method->method_holder()->protection_domain();
1380     }
1381 
1382     if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1383       local_array->push(protection_domain);
1384       previous_protection_domain = protection_domain;
1385     }
1386 
1387     if (is_privileged) break;
1388   }
1389 
1390 
1391   // either all the domains on the stack were system domains, or
1392   // we had a privileged system domain
1393   if (local_array->is_empty()) {
1394     if (is_privileged && privileged_context.is_null()) return NULL;
1395 
1396     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1397     return JNIHandles::make_local(env, result);
1398   }
1399 
1400   // the resource area must be registered in case of a gc
1401   RegisterArrayForGC ragc(thread, local_array);
1402   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1403                                                  local_array->length(), CHECK_NULL);
1404   objArrayHandle h_context(thread, context);
1405   for (int index = 0; index < local_array->length(); index++) {
1406     h_context->obj_at_put(index, local_array->at(index));
1407   }
1408 
1409   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1410 
1411   return JNIHandles::make_local(env, result);
1412 JVM_END
1413 
1414 
1415 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1416   JVMWrapper("JVM_IsArrayClass");
1417   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1418   return (k != NULL) && k->is_array_klass() ? true : false;
1419 JVM_END
1420 
1421 
1422 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1423   JVMWrapper("JVM_IsPrimitiveClass");
1424   oop mirror = JNIHandles::resolve_non_null(cls);
1425   return (jboolean) java_lang_Class::is_primitive(mirror);
1426 JVM_END
1427 
1428 
1429 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1430   JVMWrapper("JVM_GetClassModifiers");
1431   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1432     // Primitive type
1433     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1434   }
1435 
1436   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1437   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1438   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1439   return k->modifier_flags();
1440 JVM_END
1441 
1442 
1443 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1444 
1445 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1446   JvmtiVMObjectAllocEventCollector oam;
1447   // ofClass is a reference to a java_lang_Class object. The mirror object
1448   // of an InstanceKlass
1449 
1450   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1451       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1452     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1453     return (jobjectArray)JNIHandles::make_local(env, result);
1454   }
1455 
1456   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1457   InnerClassesIterator iter(k);
1458 
1459   if (iter.length() == 0) {
1460     // Neither an inner nor outer class
1461     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1462     return (jobjectArray)JNIHandles::make_local(env, result);
1463   }
1464 
1465   // find inner class info
1466   constantPoolHandle cp(thread, k->constants());
1467   int length = iter.length();
1468 
1469   // Allocate temp. result array
1470   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1471   objArrayHandle result (THREAD, r);
1472   int members = 0;
1473 
1474   for (; !iter.done(); iter.next()) {
1475     int ioff = iter.inner_class_info_index();
1476     int ooff = iter.outer_class_info_index();
1477 
1478     if (ioff != 0 && ooff != 0) {
1479       // Check to see if the name matches the class we're looking for
1480       // before attempting to find the class.
1481       if (cp->klass_name_at_matches(k, ooff)) {
1482         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1483         if (outer_klass == k) {
1484            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1485            InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1486 
1487            // Throws an exception if outer klass has not declared k as
1488            // an inner klass
1489            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1490 
1491            result->obj_at_put(members, inner_klass->java_mirror());
1492            members++;
1493         }
1494       }
1495     }
1496   }
1497 
1498   if (members != length) {
1499     // Return array of right length
1500     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1501     for(int i = 0; i < members; i++) {
1502       res->obj_at_put(i, result->obj_at(i));
1503     }
1504     return (jobjectArray)JNIHandles::make_local(env, res);
1505   }
1506 
1507   return (jobjectArray)JNIHandles::make_local(env, result());
1508 JVM_END
1509 
1510 
1511 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1512 {
1513   // ofClass is a reference to a java_lang_Class object.
1514   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1515       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1516     return NULL;
1517   }
1518 
1519   bool inner_is_member = false;
1520   Klass* outer_klass
1521     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1522                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1523   if (outer_klass == NULL)  return NULL;  // already a top-level class
1524   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1525   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1526 }
1527 JVM_END
1528 
1529 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1530 {
1531   oop mirror = JNIHandles::resolve_non_null(cls);
1532   if (java_lang_Class::is_primitive(mirror) ||
1533       !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1534     return NULL;
1535   }
1536   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1537   int ooff = 0, noff = 0;
1538   if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1539     if (noff != 0) {
1540       constantPoolHandle i_cp(thread, k->constants());
1541       Symbol* name = i_cp->symbol_at(noff);
1542       Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1543       return (jstring) JNIHandles::make_local(env, str());
1544     }
1545   }
1546   return NULL;
1547 }
1548 JVM_END
1549 
1550 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1551   assert (cls != NULL, "illegal class");
1552   JVMWrapper("JVM_GetClassSignature");
1553   JvmtiVMObjectAllocEventCollector oam;
1554   ResourceMark rm(THREAD);
1555   // Return null for arrays and primatives
1556   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1557     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1558     if (k->is_instance_klass()) {
1559       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1560       if (sym == NULL) return NULL;
1561       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1562       return (jstring) JNIHandles::make_local(env, str());
1563     }
1564   }
1565   return NULL;
1566 JVM_END
1567 
1568 
1569 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1570   assert (cls != NULL, "illegal class");
1571   JVMWrapper("JVM_GetClassAnnotations");
1572 
1573   // Return null for arrays and primitives
1574   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1575     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1576     if (k->is_instance_klass()) {
1577       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1578       return (jbyteArray) JNIHandles::make_local(env, a);
1579     }
1580   }
1581   return NULL;
1582 JVM_END
1583 
1584 
1585 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1586   // some of this code was adapted from from jni_FromReflectedField
1587 
1588   oop reflected = JNIHandles::resolve_non_null(field);
1589   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1590   Klass* k    = java_lang_Class::as_Klass(mirror);
1591   int slot      = java_lang_reflect_Field::slot(reflected);
1592   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1593 
1594   InstanceKlass* ik = InstanceKlass::cast(k);
1595   intptr_t offset = ik->field_offset(slot);
1596 
1597   if (modifiers & JVM_ACC_STATIC) {
1598     // for static fields we only look in the current class
1599     if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1600       assert(false, "cannot find static field");
1601       return false;
1602     }
1603   } else {
1604     // for instance fields we start with the current class and work
1605     // our way up through the superclass chain
1606     if (!ik->find_field_from_offset(offset, false, &fd)) {
1607       assert(false, "cannot find instance field");
1608       return false;
1609     }
1610   }
1611   return true;
1612 }
1613 
1614 static Method* jvm_get_method_common(jobject method) {
1615   // some of this code was adapted from from jni_FromReflectedMethod
1616 
1617   oop reflected = JNIHandles::resolve_non_null(method);
1618   oop mirror    = NULL;
1619   int slot      = 0;
1620 
1621   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1622     mirror = java_lang_reflect_Constructor::clazz(reflected);
1623     slot   = java_lang_reflect_Constructor::slot(reflected);
1624   } else {
1625     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1626            "wrong type");
1627     mirror = java_lang_reflect_Method::clazz(reflected);
1628     slot   = java_lang_reflect_Method::slot(reflected);
1629   }
1630   Klass* k = java_lang_Class::as_Klass(mirror);
1631 
1632   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1633   assert(m != NULL, "cannot find method");
1634   return m;  // caller has to deal with NULL in product mode
1635 }
1636 
1637 /* Type use annotations support (JDK 1.8) */
1638 
1639 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1640   assert (cls != NULL, "illegal class");
1641   JVMWrapper("JVM_GetClassTypeAnnotations");
1642   ResourceMark rm(THREAD);
1643   // Return null for arrays and primitives
1644   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1645     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1646     if (k->is_instance_klass()) {
1647       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1648       if (type_annotations != NULL) {
1649         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1650         return (jbyteArray) JNIHandles::make_local(env, a);
1651       }
1652     }
1653   }
1654   return NULL;
1655 JVM_END
1656 
1657 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1658   assert (method != NULL, "illegal method");
1659   JVMWrapper("JVM_GetMethodTypeAnnotations");
1660 
1661   // method is a handle to a java.lang.reflect.Method object
1662   Method* m = jvm_get_method_common(method);
1663   if (m == NULL) {
1664     return NULL;
1665   }
1666 
1667   AnnotationArray* type_annotations = m->type_annotations();
1668   if (type_annotations != NULL) {
1669     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1670     return (jbyteArray) JNIHandles::make_local(env, a);
1671   }
1672 
1673   return NULL;
1674 JVM_END
1675 
1676 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1677   assert (field != NULL, "illegal field");
1678   JVMWrapper("JVM_GetFieldTypeAnnotations");
1679 
1680   fieldDescriptor fd;
1681   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1682   if (!gotFd) {
1683     return NULL;
1684   }
1685 
1686   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1687 JVM_END
1688 
1689 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1690   if (!cp->is_within_bounds(index)) {
1691     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1692   }
1693 }
1694 
1695 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1696 {
1697   JVMWrapper("JVM_GetMethodParameters");
1698   // method is a handle to a java.lang.reflect.Method object
1699   Method* method_ptr = jvm_get_method_common(method);
1700   methodHandle mh (THREAD, method_ptr);
1701   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1702   const int num_params = mh->method_parameters_length();
1703 
1704   if (num_params < 0) {
1705     // A -1 return value from method_parameters_length means there is no
1706     // parameter data.  Return null to indicate this to the reflection
1707     // API.
1708     assert(num_params == -1, "num_params should be -1 if it is less than zero");
1709     return (jobjectArray)NULL;
1710   } else {
1711     // Otherwise, we return something up to reflection, even if it is
1712     // a zero-length array.  Why?  Because in some cases this can
1713     // trigger a MalformedParametersException.
1714 
1715     // make sure all the symbols are properly formatted
1716     for (int i = 0; i < num_params; i++) {
1717       MethodParametersElement* params = mh->method_parameters_start();
1718       int index = params[i].name_cp_index;
1719       bounds_check(mh->constants(), index, CHECK_NULL);
1720 
1721       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1722         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1723                     "Wrong type at constant pool index");
1724       }
1725 
1726     }
1727 
1728     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1729     objArrayHandle result (THREAD, result_oop);
1730 
1731     for (int i = 0; i < num_params; i++) {
1732       MethodParametersElement* params = mh->method_parameters_start();
1733       // For a 0 index, give a NULL symbol
1734       Symbol* sym = 0 != params[i].name_cp_index ?
1735         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1736       int flags = params[i].flags;
1737       oop param = Reflection::new_parameter(reflected_method, i, sym,
1738                                             flags, CHECK_NULL);
1739       result->obj_at_put(i, param);
1740     }
1741     return (jobjectArray)JNIHandles::make_local(env, result());
1742   }
1743 }
1744 JVM_END
1745 
1746 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1747 
1748 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1749 {
1750   JVMWrapper("JVM_GetClassDeclaredFields");
1751   JvmtiVMObjectAllocEventCollector oam;
1752 
1753   // Exclude primitive types and array types
1754   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1755       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1756     // Return empty array
1757     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1758     return (jobjectArray) JNIHandles::make_local(env, res);
1759   }
1760 
1761   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1762   constantPoolHandle cp(THREAD, k->constants());
1763 
1764   // Ensure class is linked
1765   k->link_class(CHECK_NULL);
1766 
1767   // Allocate result
1768   int num_fields;
1769 
1770   if (publicOnly) {
1771     num_fields = 0;
1772     for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1773       if (fs.access_flags().is_public()) ++num_fields;
1774     }
1775   } else {
1776     num_fields = k->java_fields_count();
1777   }
1778 
1779   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1780   objArrayHandle result (THREAD, r);
1781 
1782   int out_idx = 0;
1783   fieldDescriptor fd;
1784   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1785     if (!publicOnly || fs.access_flags().is_public()) {
1786       fd.reinitialize(k, fs.index());
1787       oop field = Reflection::new_field(&fd, CHECK_NULL);
1788       result->obj_at_put(out_idx, field);
1789       ++out_idx;
1790     }
1791   }
1792   assert(out_idx == num_fields, "just checking");
1793   return (jobjectArray) JNIHandles::make_local(env, result());
1794 }
1795 JVM_END
1796 
1797 static bool select_method(const methodHandle& method, bool want_constructor) {
1798   if (want_constructor) {
1799     return (method->is_initializer() && !method->is_static());
1800   } else {
1801     return  (!method->is_initializer() && !method->is_overpass());
1802   }
1803 }
1804 
1805 static jobjectArray get_class_declared_methods_helper(
1806                                   JNIEnv *env,
1807                                   jclass ofClass, jboolean publicOnly,
1808                                   bool want_constructor,
1809                                   Klass* klass, TRAPS) {
1810 
1811   JvmtiVMObjectAllocEventCollector oam;
1812 
1813   // Exclude primitive types and array types
1814   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1815       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1816     // Return empty array
1817     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1818     return (jobjectArray) JNIHandles::make_local(env, res);
1819   }
1820 
1821   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1822 
1823   // Ensure class is linked
1824   k->link_class(CHECK_NULL);
1825 
1826   Array<Method*>* methods = k->methods();
1827   int methods_length = methods->length();
1828 
1829   // Save original method_idnum in case of redefinition, which can change
1830   // the idnum of obsolete methods.  The new method will have the same idnum
1831   // but if we refresh the methods array, the counts will be wrong.
1832   ResourceMark rm(THREAD);
1833   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1834   int num_methods = 0;
1835 
1836   for (int i = 0; i < methods_length; i++) {
1837     methodHandle method(THREAD, methods->at(i));
1838     if (select_method(method, want_constructor)) {
1839       if (!publicOnly || method->is_public()) {
1840         idnums->push(method->method_idnum());
1841         ++num_methods;
1842       }
1843     }
1844   }
1845 
1846   // Allocate result
1847   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1848   objArrayHandle result (THREAD, r);
1849 
1850   // Now just put the methods that we selected above, but go by their idnum
1851   // in case of redefinition.  The methods can be redefined at any safepoint,
1852   // so above when allocating the oop array and below when creating reflect
1853   // objects.
1854   for (int i = 0; i < num_methods; i++) {
1855     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1856     if (method.is_null()) {
1857       // Method may have been deleted and seems this API can handle null
1858       // Otherwise should probably put a method that throws NSME
1859       result->obj_at_put(i, NULL);
1860     } else {
1861       oop m;
1862       if (want_constructor) {
1863         m = Reflection::new_constructor(method, CHECK_NULL);
1864       } else {
1865         m = Reflection::new_method(method, false, CHECK_NULL);
1866       }
1867       result->obj_at_put(i, m);
1868     }
1869   }
1870 
1871   return (jobjectArray) JNIHandles::make_local(env, result());
1872 }
1873 
1874 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1875 {
1876   JVMWrapper("JVM_GetClassDeclaredMethods");
1877   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1878                                            /*want_constructor*/ false,
1879                                            SystemDictionary::reflect_Method_klass(), THREAD);
1880 }
1881 JVM_END
1882 
1883 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1884 {
1885   JVMWrapper("JVM_GetClassDeclaredConstructors");
1886   return get_class_declared_methods_helper(env, ofClass, publicOnly,
1887                                            /*want_constructor*/ true,
1888                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
1889 }
1890 JVM_END
1891 
1892 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1893 {
1894   JVMWrapper("JVM_GetClassAccessFlags");
1895   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1896     // Primitive type
1897     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1898   }
1899 
1900   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1901   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1902 }
1903 JVM_END
1904 
1905 
1906 // Constant pool access //////////////////////////////////////////////////////////
1907 
1908 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1909 {
1910   JVMWrapper("JVM_GetClassConstantPool");
1911   JvmtiVMObjectAllocEventCollector oam;
1912 
1913   // Return null for primitives and arrays
1914   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1915     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1916     if (k->is_instance_klass()) {
1917       InstanceKlass* k_h = InstanceKlass::cast(k);
1918       Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1919       reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1920       return JNIHandles::make_local(jcp());
1921     }
1922   }
1923   return NULL;
1924 }
1925 JVM_END
1926 
1927 
1928 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1929 {
1930   JVMWrapper("JVM_ConstantPoolGetSize");
1931   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1932   return cp->length();
1933 }
1934 JVM_END
1935 
1936 
1937 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1938 {
1939   JVMWrapper("JVM_ConstantPoolGetClassAt");
1940   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1941   bounds_check(cp, index, CHECK_NULL);
1942   constantTag tag = cp->tag_at(index);
1943   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1944     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1945   }
1946   Klass* k = cp->klass_at(index, CHECK_NULL);
1947   return (jclass) JNIHandles::make_local(k->java_mirror());
1948 }
1949 JVM_END
1950 
1951 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1952 {
1953   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1954   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1955   bounds_check(cp, index, CHECK_NULL);
1956   constantTag tag = cp->tag_at(index);
1957   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1958     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1959   }
1960   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1961   if (k == NULL) return NULL;
1962   return (jclass) JNIHandles::make_local(k->java_mirror());
1963 }
1964 JVM_END
1965 
1966 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1967   constantTag tag = cp->tag_at(index);
1968   if (!tag.is_method() && !tag.is_interface_method()) {
1969     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1970   }
1971   int klass_ref  = cp->uncached_klass_ref_index_at(index);
1972   Klass* k_o;
1973   if (force_resolution) {
1974     k_o = cp->klass_at(klass_ref, CHECK_NULL);
1975   } else {
1976     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1977     if (k_o == NULL) return NULL;
1978   }
1979   InstanceKlass* k = InstanceKlass::cast(k_o);
1980   Symbol* name = cp->uncached_name_ref_at(index);
1981   Symbol* sig  = cp->uncached_signature_ref_at(index);
1982   methodHandle m (THREAD, k->find_method(name, sig));
1983   if (m.is_null()) {
1984     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1985   }
1986   oop method;
1987   if (!m->is_initializer() || m->is_static()) {
1988     method = Reflection::new_method(m, true, CHECK_NULL);
1989   } else {
1990     method = Reflection::new_constructor(m, CHECK_NULL);
1991   }
1992   return JNIHandles::make_local(method);
1993 }
1994 
1995 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1996 {
1997   JVMWrapper("JVM_ConstantPoolGetMethodAt");
1998   JvmtiVMObjectAllocEventCollector oam;
1999   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2000   bounds_check(cp, index, CHECK_NULL);
2001   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2002   return res;
2003 }
2004 JVM_END
2005 
2006 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2007 {
2008   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2009   JvmtiVMObjectAllocEventCollector oam;
2010   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2011   bounds_check(cp, index, CHECK_NULL);
2012   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2013   return res;
2014 }
2015 JVM_END
2016 
2017 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2018   constantTag tag = cp->tag_at(index);
2019   if (!tag.is_field()) {
2020     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2021   }
2022   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2023   Klass* k_o;
2024   if (force_resolution) {
2025     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2026   } else {
2027     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2028     if (k_o == NULL) return NULL;
2029   }
2030   InstanceKlass* k = InstanceKlass::cast(k_o);
2031   Symbol* name = cp->uncached_name_ref_at(index);
2032   Symbol* sig  = cp->uncached_signature_ref_at(index);
2033   fieldDescriptor fd;
2034   Klass* target_klass = k->find_field(name, sig, &fd);
2035   if (target_klass == NULL) {
2036     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2037   }
2038   oop field = Reflection::new_field(&fd, CHECK_NULL);
2039   return JNIHandles::make_local(field);
2040 }
2041 
2042 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2043 {
2044   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2045   JvmtiVMObjectAllocEventCollector oam;
2046   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2047   bounds_check(cp, index, CHECK_NULL);
2048   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2049   return res;
2050 }
2051 JVM_END
2052 
2053 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2054 {
2055   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2056   JvmtiVMObjectAllocEventCollector oam;
2057   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2058   bounds_check(cp, index, CHECK_NULL);
2059   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2060   return res;
2061 }
2062 JVM_END
2063 
2064 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2065 {
2066   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2067   JvmtiVMObjectAllocEventCollector oam;
2068   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2069   bounds_check(cp, index, CHECK_NULL);
2070   constantTag tag = cp->tag_at(index);
2071   if (!tag.is_field_or_method()) {
2072     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2073   }
2074   int klass_ref = cp->uncached_klass_ref_index_at(index);
2075   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2076   Symbol*  member_name = cp->uncached_name_ref_at(index);
2077   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2078   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2079   objArrayHandle dest(THREAD, dest_o);
2080   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2081   dest->obj_at_put(0, str());
2082   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2083   dest->obj_at_put(1, str());
2084   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2085   dest->obj_at_put(2, str());
2086   return (jobjectArray) JNIHandles::make_local(dest());
2087 }
2088 JVM_END
2089 
2090 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2091 {
2092   JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2093   JvmtiVMObjectAllocEventCollector oam;
2094   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2095   bounds_check(cp, index, CHECK_0);
2096   constantTag tag = cp->tag_at(index);
2097   if (!tag.is_field_or_method()) {
2098     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2099   }
2100   return (jint) cp->uncached_klass_ref_index_at(index);
2101 }
2102 JVM_END
2103 
2104 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2105 {
2106   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2107   JvmtiVMObjectAllocEventCollector oam;
2108   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2109   bounds_check(cp, index, CHECK_0);
2110   constantTag tag = cp->tag_at(index);
2111   if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2112     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2113   }
2114   return (jint) cp->uncached_name_and_type_ref_index_at(index);
2115 }
2116 JVM_END
2117 
2118 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2119 {
2120   JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2121   JvmtiVMObjectAllocEventCollector oam;
2122   constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2123   bounds_check(cp, index, CHECK_NULL);
2124   constantTag tag = cp->tag_at(index);
2125   if (!tag.is_name_and_type()) {
2126     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2127   }
2128   Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2129   Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2130   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2131   objArrayHandle dest(THREAD, dest_o);
2132   Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2133   dest->obj_at_put(0, str());
2134   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2135   dest->obj_at_put(1, str());
2136   return (jobjectArray) JNIHandles::make_local(dest());
2137 }
2138 JVM_END
2139 
2140 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2141 {
2142   JVMWrapper("JVM_ConstantPoolGetIntAt");
2143   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2144   bounds_check(cp, index, CHECK_0);
2145   constantTag tag = cp->tag_at(index);
2146   if (!tag.is_int()) {
2147     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2148   }
2149   return cp->int_at(index);
2150 }
2151 JVM_END
2152 
2153 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2154 {
2155   JVMWrapper("JVM_ConstantPoolGetLongAt");
2156   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2157   bounds_check(cp, index, CHECK_(0L));
2158   constantTag tag = cp->tag_at(index);
2159   if (!tag.is_long()) {
2160     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2161   }
2162   return cp->long_at(index);
2163 }
2164 JVM_END
2165 
2166 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2167 {
2168   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2169   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2170   bounds_check(cp, index, CHECK_(0.0f));
2171   constantTag tag = cp->tag_at(index);
2172   if (!tag.is_float()) {
2173     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2174   }
2175   return cp->float_at(index);
2176 }
2177 JVM_END
2178 
2179 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2180 {
2181   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2182   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2183   bounds_check(cp, index, CHECK_(0.0));
2184   constantTag tag = cp->tag_at(index);
2185   if (!tag.is_double()) {
2186     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2187   }
2188   return cp->double_at(index);
2189 }
2190 JVM_END
2191 
2192 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2193 {
2194   JVMWrapper("JVM_ConstantPoolGetStringAt");
2195   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2196   bounds_check(cp, index, CHECK_NULL);
2197   constantTag tag = cp->tag_at(index);
2198   if (!tag.is_string()) {
2199     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2200   }
2201   oop str = cp->string_at(index, CHECK_NULL);
2202   return (jstring) JNIHandles::make_local(str);
2203 }
2204 JVM_END
2205 
2206 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2207 {
2208   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2209   JvmtiVMObjectAllocEventCollector oam;
2210   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2211   bounds_check(cp, index, CHECK_NULL);
2212   constantTag tag = cp->tag_at(index);
2213   if (!tag.is_symbol()) {
2214     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2215   }
2216   Symbol* sym = cp->symbol_at(index);
2217   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2218   return (jstring) JNIHandles::make_local(str());
2219 }
2220 JVM_END
2221 
2222 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2223 {
2224   JVMWrapper("JVM_ConstantPoolGetTagAt");
2225   constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2226   bounds_check(cp, index, CHECK_0);
2227   constantTag tag = cp->tag_at(index);
2228   jbyte result = tag.value();
2229   // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2230   // they are changed to the corresponding tags from the JVM spec, so that java code in
2231   // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2232   if (tag.is_klass_or_reference()) {
2233       result = JVM_CONSTANT_Class;
2234   } else if (tag.is_string_index()) {
2235       result = JVM_CONSTANT_String;
2236   } else if (tag.is_method_type_in_error()) {
2237       result = JVM_CONSTANT_MethodType;
2238   } else if (tag.is_method_handle_in_error()) {
2239       result = JVM_CONSTANT_MethodHandle;
2240   }
2241   return result;
2242 }
2243 JVM_END
2244 
2245 // Assertion support. //////////////////////////////////////////////////////////
2246 
2247 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2248   JVMWrapper("JVM_DesiredAssertionStatus");
2249   assert(cls != NULL, "bad class");
2250 
2251   oop r = JNIHandles::resolve(cls);
2252   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2253   if (java_lang_Class::is_primitive(r)) return false;
2254 
2255   Klass* k = java_lang_Class::as_Klass(r);
2256   assert(k->is_instance_klass(), "must be an instance klass");
2257   if (!k->is_instance_klass()) return false;
2258 
2259   ResourceMark rm(THREAD);
2260   const char* name = k->name()->as_C_string();
2261   bool system_class = k->class_loader() == NULL;
2262   return JavaAssertions::enabled(name, system_class);
2263 
2264 JVM_END
2265 
2266 
2267 // Return a new AssertionStatusDirectives object with the fields filled in with
2268 // command-line assertion arguments (i.e., -ea, -da).
2269 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2270   JVMWrapper("JVM_AssertionStatusDirectives");
2271   JvmtiVMObjectAllocEventCollector oam;
2272   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2273   return JNIHandles::make_local(env, asd);
2274 JVM_END
2275 
2276 // Verification ////////////////////////////////////////////////////////////////////////////////
2277 
2278 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2279 
2280 // RedefineClasses support: bug 6214132 caused verification to fail.
2281 // All functions from this section should call the jvmtiThreadSate function:
2282 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2283 // The function returns a Klass* of the _scratch_class if the verifier
2284 // was invoked in the middle of the class redefinition.
2285 // Otherwise it returns its argument value which is the _the_class Klass*.
2286 // Please, refer to the description in the jvmtiThreadSate.hpp.
2287 
2288 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2289   JVMWrapper("JVM_GetClassNameUTF");
2290   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2291   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2292   return k->name()->as_utf8();
2293 JVM_END
2294 
2295 
2296 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2297   JVMWrapper("JVM_GetClassCPTypes");
2298   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2299   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2300   // types will have length zero if this is not an InstanceKlass
2301   // (length is determined by call to JVM_GetClassCPEntriesCount)
2302   if (k->is_instance_klass()) {
2303     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2304     for (int index = cp->length() - 1; index >= 0; index--) {
2305       constantTag tag = cp->tag_at(index);
2306       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2307     }
2308   }
2309 JVM_END
2310 
2311 
2312 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2313   JVMWrapper("JVM_GetClassCPEntriesCount");
2314   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2315   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2316   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2317 JVM_END
2318 
2319 
2320 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2321   JVMWrapper("JVM_GetClassFieldsCount");
2322   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2323   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2324   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2325 JVM_END
2326 
2327 
2328 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2329   JVMWrapper("JVM_GetClassMethodsCount");
2330   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2331   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2332   return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2333 JVM_END
2334 
2335 
2336 // The following methods, used for the verifier, are never called with
2337 // array klasses, so a direct cast to InstanceKlass is safe.
2338 // Typically, these methods are called in a loop with bounds determined
2339 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2340 // zero for arrays.
2341 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2342   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2343   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2344   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2345   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2346   int length = method->checked_exceptions_length();
2347   if (length > 0) {
2348     CheckedExceptionElement* table= method->checked_exceptions_start();
2349     for (int i = 0; i < length; i++) {
2350       exceptions[i] = table[i].class_cp_index;
2351     }
2352   }
2353 JVM_END
2354 
2355 
2356 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2357   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2358   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2359   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2360   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2361   return method->checked_exceptions_length();
2362 JVM_END
2363 
2364 
2365 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2366   JVMWrapper("JVM_GetMethodIxByteCode");
2367   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2368   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2369   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2370   memcpy(code, method->code_base(), method->code_size());
2371 JVM_END
2372 
2373 
2374 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2375   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2376   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379   return method->code_size();
2380 JVM_END
2381 
2382 
2383 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2384   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2385   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2386   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2387   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2388   ExceptionTable extable(method);
2389   entry->start_pc   = extable.start_pc(entry_index);
2390   entry->end_pc     = extable.end_pc(entry_index);
2391   entry->handler_pc = extable.handler_pc(entry_index);
2392   entry->catchType  = extable.catch_type_index(entry_index);
2393 JVM_END
2394 
2395 
2396 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2397   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2398   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2399   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2400   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2401   return method->exception_table_length();
2402 JVM_END
2403 
2404 
2405 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2406   JVMWrapper("JVM_GetMethodIxModifiers");
2407   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2408   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2409   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2410   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2411 JVM_END
2412 
2413 
2414 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2415   JVMWrapper("JVM_GetFieldIxModifiers");
2416   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2417   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2418   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2419 JVM_END
2420 
2421 
2422 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2423   JVMWrapper("JVM_GetMethodIxLocalsCount");
2424   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2427   return method->max_locals();
2428 JVM_END
2429 
2430 
2431 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2432   JVMWrapper("JVM_GetMethodIxArgsSize");
2433   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2434   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2435   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2436   return method->size_of_parameters();
2437 JVM_END
2438 
2439 
2440 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2441   JVMWrapper("JVM_GetMethodIxMaxStack");
2442   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2443   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2444   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2445   return method->verifier_max_stack();
2446 JVM_END
2447 
2448 
2449 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2450   JVMWrapper("JVM_IsConstructorIx");
2451   ResourceMark rm(THREAD);
2452   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2453   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2454   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2455   return method->name() == vmSymbols::object_initializer_name();
2456 JVM_END
2457 
2458 
2459 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2460   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2461   ResourceMark rm(THREAD);
2462   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2463   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2464   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2465   return method->is_overpass();
2466 JVM_END
2467 
2468 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2469   JVMWrapper("JVM_GetMethodIxIxUTF");
2470   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2471   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2472   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2473   return method->name()->as_utf8();
2474 JVM_END
2475 
2476 
2477 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2478   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2479   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2480   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2481   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2482   return method->signature()->as_utf8();
2483 JVM_END
2484 
2485 /**
2486  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2487  * read entries in the constant pool.  Since the old verifier always
2488  * works on a copy of the code, it will not see any rewriting that
2489  * may possibly occur in the middle of verification.  So it is important
2490  * that nothing it calls tries to use the cpCache instead of the raw
2491  * constant pool, so we must use cp->uncached_x methods when appropriate.
2492  */
2493 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2494   JVMWrapper("JVM_GetCPFieldNameUTF");
2495   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2496   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2497   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2498   switch (cp->tag_at(cp_index).value()) {
2499     case JVM_CONSTANT_Fieldref:
2500       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2501     default:
2502       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2503   }
2504   ShouldNotReachHere();
2505   return NULL;
2506 JVM_END
2507 
2508 
2509 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2510   JVMWrapper("JVM_GetCPMethodNameUTF");
2511   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2512   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2513   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2514   switch (cp->tag_at(cp_index).value()) {
2515     case JVM_CONSTANT_InterfaceMethodref:
2516     case JVM_CONSTANT_Methodref:
2517       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2518     default:
2519       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2520   }
2521   ShouldNotReachHere();
2522   return NULL;
2523 JVM_END
2524 
2525 
2526 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2527   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2528   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2529   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2530   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2531   switch (cp->tag_at(cp_index).value()) {
2532     case JVM_CONSTANT_InterfaceMethodref:
2533     case JVM_CONSTANT_Methodref:
2534       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2535     default:
2536       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2537   }
2538   ShouldNotReachHere();
2539   return NULL;
2540 JVM_END
2541 
2542 
2543 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2544   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2545   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2546   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2547   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2548   switch (cp->tag_at(cp_index).value()) {
2549     case JVM_CONSTANT_Fieldref:
2550       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2551     default:
2552       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2553   }
2554   ShouldNotReachHere();
2555   return NULL;
2556 JVM_END
2557 
2558 
2559 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2560   JVMWrapper("JVM_GetCPClassNameUTF");
2561   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2562   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2563   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2564   Symbol* classname = cp->klass_name_at(cp_index);
2565   return classname->as_utf8();
2566 JVM_END
2567 
2568 
2569 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2570   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2571   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2572   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2573   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2574   switch (cp->tag_at(cp_index).value()) {
2575     case JVM_CONSTANT_Fieldref: {
2576       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2577       Symbol* classname = cp->klass_name_at(class_index);
2578       return classname->as_utf8();
2579     }
2580     default:
2581       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2582   }
2583   ShouldNotReachHere();
2584   return NULL;
2585 JVM_END
2586 
2587 
2588 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2589   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2590   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2591   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2592   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2593   switch (cp->tag_at(cp_index).value()) {
2594     case JVM_CONSTANT_Methodref:
2595     case JVM_CONSTANT_InterfaceMethodref: {
2596       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2597       Symbol* classname = cp->klass_name_at(class_index);
2598       return classname->as_utf8();
2599     }
2600     default:
2601       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2602   }
2603   ShouldNotReachHere();
2604   return NULL;
2605 JVM_END
2606 
2607 
2608 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2609   JVMWrapper("JVM_GetCPFieldModifiers");
2610   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2611   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2612   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2613   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2614   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2615   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2616   switch (cp->tag_at(cp_index).value()) {
2617     case JVM_CONSTANT_Fieldref: {
2618       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2619       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2620       InstanceKlass* ik = InstanceKlass::cast(k_called);
2621       for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2622         if (fs.name() == name && fs.signature() == signature) {
2623           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2624         }
2625       }
2626       return -1;
2627     }
2628     default:
2629       fatal("JVM_GetCPFieldModifiers: illegal constant");
2630   }
2631   ShouldNotReachHere();
2632   return 0;
2633 JVM_END
2634 
2635 
2636 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2637   JVMWrapper("JVM_GetCPMethodModifiers");
2638   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2639   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2640   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2641   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2642   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2643   switch (cp->tag_at(cp_index).value()) {
2644     case JVM_CONSTANT_Methodref:
2645     case JVM_CONSTANT_InterfaceMethodref: {
2646       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2647       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2648       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2649       int methods_count = methods->length();
2650       for (int i = 0; i < methods_count; i++) {
2651         Method* method = methods->at(i);
2652         if (method->name() == name && method->signature() == signature) {
2653             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2654         }
2655       }
2656       return -1;
2657     }
2658     default:
2659       fatal("JVM_GetCPMethodModifiers: illegal constant");
2660   }
2661   ShouldNotReachHere();
2662   return 0;
2663 JVM_END
2664 
2665 
2666 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2667 
2668 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2669   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2670 JVM_END
2671 
2672 
2673 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2674   JVMWrapper("JVM_IsSameClassPackage");
2675   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2676   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2677   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2678   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2679   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2680 JVM_END
2681 
2682 // Printing support //////////////////////////////////////////////////
2683 extern "C" {
2684 
2685 ATTRIBUTE_PRINTF(3, 0)
2686 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2687   // see bug 4399518, 4417214
2688   if ((intptr_t)count <= 0) return -1;
2689 
2690   int result = vsnprintf(str, count, fmt, args);
2691   // Note: on truncation vsnprintf(3) on Unix returns numbers of
2692   // characters which would have been written had the buffer been large
2693   // enough; on Windows, it returns -1. We handle both cases here and
2694   // always return -1, and perform null termination.
2695   if ((result > 0 && (size_t)result >= count) || result == -1) {
2696     str[count - 1] = '\0';
2697     result = -1;
2698   }
2699 
2700   return result;
2701 }
2702 
2703 ATTRIBUTE_PRINTF(3, 0)
2704 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2705   va_list args;
2706   int len;
2707   va_start(args, fmt);
2708   len = jio_vsnprintf(str, count, fmt, args);
2709   va_end(args);
2710   return len;
2711 }
2712 
2713 ATTRIBUTE_PRINTF(2,3)
2714 int jio_fprintf(FILE* f, const char *fmt, ...) {
2715   int len;
2716   va_list args;
2717   va_start(args, fmt);
2718   len = jio_vfprintf(f, fmt, args);
2719   va_end(args);
2720   return len;
2721 }
2722 
2723 ATTRIBUTE_PRINTF(2, 0)
2724 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2725   if (Arguments::vfprintf_hook() != NULL) {
2726      return Arguments::vfprintf_hook()(f, fmt, args);
2727   } else {
2728     return vfprintf(f, fmt, args);
2729   }
2730 }
2731 
2732 ATTRIBUTE_PRINTF(1, 2)
2733 JNIEXPORT int jio_printf(const char *fmt, ...) {
2734   int len;
2735   va_list args;
2736   va_start(args, fmt);
2737   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2738   va_end(args);
2739   return len;
2740 }
2741 
2742 
2743 // HotSpot specific jio method
2744 void jio_print(const char* s) {
2745   // Try to make this function as atomic as possible.
2746   if (Arguments::vfprintf_hook() != NULL) {
2747     jio_fprintf(defaultStream::output_stream(), "%s", s);
2748   } else {
2749     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2750     size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2751   }
2752 }
2753 
2754 } // Extern C
2755 
2756 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2757 
2758 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2759 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2760 // OSThread objects.  The exception to this rule is when the target object is the thread
2761 // doing the operation, in which case we know that the thread won't exit until the
2762 // operation is done (all exits being voluntary).  There are a few cases where it is
2763 // rather silly to do operations on yourself, like resuming yourself or asking whether
2764 // you are alive.  While these can still happen, they are not subject to deadlocks if
2765 // the lock is held while the operation occurs (this is not the case for suspend, for
2766 // instance), and are very unlikely.  Because IsAlive needs to be fast and its
2767 // implementation is local to this file, we always lock Threads_lock for that one.
2768 
2769 static void thread_entry(JavaThread* thread, TRAPS) {
2770   HandleMark hm(THREAD);
2771   Handle obj(THREAD, thread->threadObj());
2772   JavaValue result(T_VOID);
2773   JavaCalls::call_virtual(&result,
2774                           obj,
2775                           SystemDictionary::Thread_klass(),
2776                           vmSymbols::run_method_name(),
2777                           vmSymbols::void_method_signature(),
2778                           THREAD);
2779 }
2780 
2781 
2782 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2783   JVMWrapper("JVM_StartThread");
2784   JavaThread *native_thread = NULL;
2785 
2786   // We cannot hold the Threads_lock when we throw an exception,
2787   // due to rank ordering issues. Example:  we might need to grab the
2788   // Heap_lock while we construct the exception.
2789   bool throw_illegal_thread_state = false;
2790 
2791   // We must release the Threads_lock before we can post a jvmti event
2792   // in Thread::start.
2793   {
2794     // Ensure that the C++ Thread and OSThread structures aren't freed before
2795     // we operate.
2796     MutexLocker mu(Threads_lock);
2797 
2798     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2799     // re-starting an already started thread, so we should usually find
2800     // that the JavaThread is null. However for a JNI attached thread
2801     // there is a small window between the Thread object being created
2802     // (with its JavaThread set) and the update to its threadStatus, so we
2803     // have to check for this
2804     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2805       throw_illegal_thread_state = true;
2806     } else {
2807       // We could also check the stillborn flag to see if this thread was already stopped, but
2808       // for historical reasons we let the thread detect that itself when it starts running
2809 
2810       jlong size =
2811              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2812       // Allocate the C++ Thread structure and create the native thread.  The
2813       // stack size retrieved from java is 64-bit signed, but the constructor takes
2814       // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2815       //  - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2816       //  - Avoid passing negative values which would result in really large stacks.
2817       NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2818       size_t sz = size > 0 ? (size_t) size : 0;
2819       native_thread = new JavaThread(&thread_entry, sz);
2820 
2821       // At this point it may be possible that no osthread was created for the
2822       // JavaThread due to lack of memory. Check for this situation and throw
2823       // an exception if necessary. Eventually we may want to change this so
2824       // that we only grab the lock if the thread was created successfully -
2825       // then we can also do this check and throw the exception in the
2826       // JavaThread constructor.
2827       if (native_thread->osthread() != NULL) {
2828         // Note: the current thread is not being used within "prepare".
2829         native_thread->prepare(jthread);
2830       }
2831     }
2832   }
2833 
2834   if (throw_illegal_thread_state) {
2835     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2836   }
2837 
2838   assert(native_thread != NULL, "Starting null thread?");
2839 
2840   if (native_thread->osthread() == NULL) {
2841     // No one should hold a reference to the 'native_thread'.
2842     delete native_thread;
2843     if (JvmtiExport::should_post_resource_exhausted()) {
2844       JvmtiExport::post_resource_exhausted(
2845         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2846         os::native_thread_creation_failed_msg());
2847     }
2848     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2849               os::native_thread_creation_failed_msg());
2850   }
2851 
2852   Thread::start(native_thread);
2853 
2854 JVM_END
2855 
2856 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2857 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2858 // but is thought to be reliable and simple. In the case, where the receiver is the
2859 // same thread as the sender, no safepoint is needed.
2860 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2861   JVMWrapper("JVM_StopThread");
2862 
2863   oop java_throwable = JNIHandles::resolve(throwable);
2864   if (java_throwable == NULL) {
2865     THROW(vmSymbols::java_lang_NullPointerException());
2866   }
2867   oop java_thread = JNIHandles::resolve_non_null(jthread);
2868   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2869   Events::log_exception(JavaThread::current(),
2870                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2871                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
2872   // First check if thread is alive
2873   if (receiver != NULL) {
2874     // Check if exception is getting thrown at self (use oop equality, since the
2875     // target object might exit)
2876     if (java_thread == thread->threadObj()) {
2877       THROW_OOP(java_throwable);
2878     } else {
2879       // Enques a VM_Operation to stop all threads and then deliver the exception...
2880       Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2881     }
2882   }
2883   else {
2884     // Either:
2885     // - target thread has not been started before being stopped, or
2886     // - target thread already terminated
2887     // We could read the threadStatus to determine which case it is
2888     // but that is overkill as it doesn't matter. We must set the
2889     // stillborn flag for the first case, and if the thread has already
2890     // exited setting this flag has no affect
2891     java_lang_Thread::set_stillborn(java_thread);
2892   }
2893 JVM_END
2894 
2895 
2896 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2897   JVMWrapper("JVM_IsThreadAlive");
2898 
2899   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2900   return java_lang_Thread::is_alive(thread_oop);
2901 JVM_END
2902 
2903 
2904 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2905   JVMWrapper("JVM_SuspendThread");
2906   oop java_thread = JNIHandles::resolve_non_null(jthread);
2907   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2908 
2909   if (receiver != NULL) {
2910     // thread has run and has not exited (still on threads list)
2911 
2912     {
2913       MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2914       if (receiver->is_external_suspend()) {
2915         // Don't allow nested external suspend requests. We can't return
2916         // an error from this interface so just ignore the problem.
2917         return;
2918       }
2919       if (receiver->is_exiting()) { // thread is in the process of exiting
2920         return;
2921       }
2922       receiver->set_external_suspend();
2923     }
2924 
2925     // java_suspend() will catch threads in the process of exiting
2926     // and will ignore them.
2927     receiver->java_suspend();
2928 
2929     // It would be nice to have the following assertion in all the
2930     // time, but it is possible for a racing resume request to have
2931     // resumed this thread right after we suspended it. Temporarily
2932     // enable this assertion if you are chasing a different kind of
2933     // bug.
2934     //
2935     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2936     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2937   }
2938 JVM_END
2939 
2940 
2941 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2942   JVMWrapper("JVM_ResumeThread");
2943   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2944   // We need to *always* get the threads lock here, since this operation cannot be allowed during
2945   // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2946   // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2947   // looks at it.
2948   MutexLocker ml(Threads_lock);
2949   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2950   if (thr != NULL) {
2951     // the thread has run and is not in the process of exiting
2952     thr->java_resume();
2953   }
2954 JVM_END
2955 
2956 
2957 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2958   JVMWrapper("JVM_SetThreadPriority");
2959   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2960   MutexLocker ml(Threads_lock);
2961   oop java_thread = JNIHandles::resolve_non_null(jthread);
2962   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2963   JavaThread* thr = java_lang_Thread::thread(java_thread);
2964   if (thr != NULL) {                  // Thread not yet started; priority pushed down when it is
2965     Thread::set_priority(thr, (ThreadPriority)prio);
2966   }
2967 JVM_END
2968 
2969 
2970 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2971   JVMWrapper("JVM_Yield");
2972   if (os::dont_yield()) return;
2973   HOTSPOT_THREAD_YIELD();
2974   os::naked_yield();
2975 JVM_END
2976 
2977 
2978 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2979   JVMWrapper("JVM_Sleep");
2980 
2981   if (millis < 0) {
2982     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2983   }
2984 
2985   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2986     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2987   }
2988 
2989   // Save current thread state and restore it at the end of this block.
2990   // And set new thread state to SLEEPING.
2991   JavaThreadSleepState jtss(thread);
2992 
2993   HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2994 
2995   EventThreadSleep event;
2996 
2997   if (millis == 0) {
2998     os::naked_yield();
2999   } else {
3000     ThreadState old_state = thread->osthread()->get_state();
3001     thread->osthread()->set_state(SLEEPING);
3002     if (os::sleep(thread, millis, true) == OS_INTRPT) {
3003       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3004       // us while we were sleeping. We do not overwrite those.
3005       if (!HAS_PENDING_EXCEPTION) {
3006         if (event.should_commit()) {
3007           event.set_time(millis);
3008           event.commit();
3009         }
3010         HOTSPOT_THREAD_SLEEP_END(1);
3011 
3012         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3013         // to properly restore the thread state.  That's likely wrong.
3014         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3015       }
3016     }
3017     thread->osthread()->set_state(old_state);
3018   }
3019   if (event.should_commit()) {
3020     event.set_time(millis);
3021     event.commit();
3022   }
3023   HOTSPOT_THREAD_SLEEP_END(0);
3024 JVM_END
3025 
3026 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3027   JVMWrapper("JVM_CurrentThread");
3028   oop jthread = thread->threadObj();
3029   assert (thread != NULL, "no current thread!");
3030   return JNIHandles::make_local(env, jthread);
3031 JVM_END
3032 
3033 
3034 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3035   JVMWrapper("JVM_CountStackFrames");
3036 
3037   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3038   oop java_thread = JNIHandles::resolve_non_null(jthread);
3039   bool throw_illegal_thread_state = false;
3040   int count = 0;
3041 
3042   {
3043     MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3044     // We need to re-resolve the java_thread, since a GC might have happened during the
3045     // acquire of the lock
3046     JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3047 
3048     if (thr == NULL) {
3049       // do nothing
3050     } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3051       // Check whether this java thread has been suspended already. If not, throws
3052       // IllegalThreadStateException. We defer to throw that exception until
3053       // Threads_lock is released since loading exception class has to leave VM.
3054       // The correct way to test a thread is actually suspended is
3055       // wait_for_ext_suspend_completion(), but we can't call that while holding
3056       // the Threads_lock. The above tests are sufficient for our purposes
3057       // provided the walkability of the stack is stable - which it isn't
3058       // 100% but close enough for most practical purposes.
3059       throw_illegal_thread_state = true;
3060     } else {
3061       // Count all java activation, i.e., number of vframes
3062       for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3063         // Native frames are not counted
3064         if (!vfst.method()->is_native()) count++;
3065        }
3066     }
3067   }
3068 
3069   if (throw_illegal_thread_state) {
3070     THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3071                 "this thread is not suspended");
3072   }
3073   return count;
3074 JVM_END
3075 
3076 // Consider: A better way to implement JVM_Interrupt() is to acquire
3077 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3078 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3079 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3080 // outside the critical section.  Threads_lock is hot so we want to minimize
3081 // the hold-time.  A cleaner interface would be to decompose interrupt into
3082 // two steps.  The 1st phase, performed under Threads_lock, would return
3083 // a closure that'd be invoked after Threads_lock was dropped.
3084 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3085 // admit spurious wakeups.
3086 
3087 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3088   JVMWrapper("JVM_Interrupt");
3089 
3090   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3091   oop java_thread = JNIHandles::resolve_non_null(jthread);
3092   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3093   // We need to re-resolve the java_thread, since a GC might have happened during the
3094   // acquire of the lock
3095   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3096   if (thr != NULL) {
3097     Thread::interrupt(thr);
3098   }
3099 JVM_END
3100 
3101 
3102 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3103   JVMWrapper("JVM_IsInterrupted");
3104 
3105   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3106   oop java_thread = JNIHandles::resolve_non_null(jthread);
3107   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3108   // We need to re-resolve the java_thread, since a GC might have happened during the
3109   // acquire of the lock
3110   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3111   if (thr == NULL) {
3112     return JNI_FALSE;
3113   } else {
3114     return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3115   }
3116 JVM_END
3117 
3118 
3119 // Return true iff the current thread has locked the object passed in
3120 
3121 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3122   JVMWrapper("JVM_HoldsLock");
3123   assert(THREAD->is_Java_thread(), "sanity check");
3124   if (obj == NULL) {
3125     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3126   }
3127   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3128   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3129 JVM_END
3130 
3131 
3132 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3133   JVMWrapper("JVM_DumpAllStacks");
3134   VM_PrintThreads op;
3135   VMThread::execute(&op);
3136   if (JvmtiExport::should_post_data_dump()) {
3137     JvmtiExport::post_data_dump();
3138   }
3139 JVM_END
3140 
3141 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3142   JVMWrapper("JVM_SetNativeThreadName");
3143   ResourceMark rm(THREAD);
3144   oop java_thread = JNIHandles::resolve_non_null(jthread);
3145   JavaThread* thr = java_lang_Thread::thread(java_thread);
3146   // Thread naming only supported for the current thread, doesn't work for
3147   // target threads.
3148   if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3149     // we don't set the name of an attached thread to avoid stepping
3150     // on other programs
3151     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3152     os::set_native_thread_name(thread_name);
3153   }
3154 JVM_END
3155 
3156 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3157 
3158 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3159   assert(jthread->is_Java_thread(), "must be a Java thread");
3160   if (jthread->privileged_stack_top() == NULL) return false;
3161   if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3162     oop loader = jthread->privileged_stack_top()->class_loader();
3163     if (loader == NULL) return true;
3164     bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3165     if (trusted) return true;
3166   }
3167   return false;
3168 }
3169 
3170 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3171   JVMWrapper("JVM_CurrentLoadedClass");
3172   ResourceMark rm(THREAD);
3173 
3174   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3175     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3176     bool trusted = is_trusted_frame(thread, &vfst);
3177     if (trusted) return NULL;
3178 
3179     Method* m = vfst.method();
3180     if (!m->is_native()) {
3181       InstanceKlass* holder = m->method_holder();
3182       oop loader = holder->class_loader();
3183       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3184         return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3185       }
3186     }
3187   }
3188   return NULL;
3189 JVM_END
3190 
3191 
3192 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3193   JVMWrapper("JVM_CurrentClassLoader");
3194   ResourceMark rm(THREAD);
3195 
3196   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3197 
3198     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3199     bool trusted = is_trusted_frame(thread, &vfst);
3200     if (trusted) return NULL;
3201 
3202     Method* m = vfst.method();
3203     if (!m->is_native()) {
3204       InstanceKlass* holder = m->method_holder();
3205       assert(holder->is_klass(), "just checking");
3206       oop loader = holder->class_loader();
3207       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3208         return JNIHandles::make_local(env, loader);
3209       }
3210     }
3211   }
3212   return NULL;
3213 JVM_END
3214 
3215 
3216 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3217   JVMWrapper("JVM_GetClassContext");
3218   ResourceMark rm(THREAD);
3219   JvmtiVMObjectAllocEventCollector oam;
3220   vframeStream vfst(thread);
3221 
3222   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3223     // This must only be called from SecurityManager.getClassContext
3224     Method* m = vfst.method();
3225     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3226           m->name()          == vmSymbols::getClassContext_name() &&
3227           m->signature()     == vmSymbols::void_class_array_signature())) {
3228       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3229     }
3230   }
3231 
3232   // Collect method holders
3233   GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3234   for (; !vfst.at_end(); vfst.security_next()) {
3235     Method* m = vfst.method();
3236     // Native frames are not returned
3237     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3238       Klass* holder = m->method_holder();
3239       assert(holder->is_klass(), "just checking");
3240       klass_array->append(holder);
3241     }
3242   }
3243 
3244   // Create result array of type [Ljava/lang/Class;
3245   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3246   // Fill in mirrors corresponding to method holders
3247   for (int i = 0; i < klass_array->length(); i++) {
3248     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3249   }
3250 
3251   return (jobjectArray) JNIHandles::make_local(env, result);
3252 JVM_END
3253 
3254 
3255 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3256   JVMWrapper("JVM_ClassDepth");
3257   ResourceMark rm(THREAD);
3258   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3259   Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3260 
3261   const char* str = java_lang_String::as_utf8_string(class_name_str());
3262   TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3263   if (class_name_sym == NULL) {
3264     return -1;
3265   }
3266 
3267   int depth = 0;
3268 
3269   for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3270     if (!vfst.method()->is_native()) {
3271       InstanceKlass* holder = vfst.method()->method_holder();
3272       assert(holder->is_klass(), "just checking");
3273       if (holder->name() == class_name_sym) {
3274         return depth;
3275       }
3276       depth++;
3277     }
3278   }
3279   return -1;
3280 JVM_END
3281 
3282 
3283 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3284   JVMWrapper("JVM_ClassLoaderDepth");
3285   ResourceMark rm(THREAD);
3286   int depth = 0;
3287   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3288     // if a method in a class in a trusted loader is in a doPrivileged, return -1
3289     bool trusted = is_trusted_frame(thread, &vfst);
3290     if (trusted) return -1;
3291 
3292     Method* m = vfst.method();
3293     if (!m->is_native()) {
3294       InstanceKlass* holder = m->method_holder();
3295       assert(holder->is_klass(), "just checking");
3296       oop loader = holder->class_loader();
3297       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3298         return depth;
3299       }
3300       depth++;
3301     }
3302   }
3303   return -1;
3304 JVM_END
3305 
3306 
3307 // java.lang.Package ////////////////////////////////////////////////////////////////
3308 
3309 
3310 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3311   JVMWrapper("JVM_GetSystemPackage");
3312   ResourceMark rm(THREAD);
3313   JvmtiVMObjectAllocEventCollector oam;
3314   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3315   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3316   return (jstring) JNIHandles::make_local(result);
3317 JVM_END
3318 
3319 
3320 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3321   JVMWrapper("JVM_GetSystemPackages");
3322   JvmtiVMObjectAllocEventCollector oam;
3323   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3324   return (jobjectArray) JNIHandles::make_local(result);
3325 JVM_END
3326 
3327 
3328 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3329 
3330 
3331 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3332   JVMWrapper("JVM_GetAndClearReferencePendingList");
3333 
3334   MonitorLockerEx ml(Heap_lock);
3335   oop ref = Universe::reference_pending_list();
3336   if (ref != NULL) {
3337     Universe::set_reference_pending_list(NULL);
3338   }
3339   return JNIHandles::make_local(env, ref);
3340 JVM_END
3341 
3342 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3343   JVMWrapper("JVM_HasReferencePendingList");
3344   MonitorLockerEx ml(Heap_lock);
3345   return Universe::has_reference_pending_list();
3346 JVM_END
3347 
3348 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3349   JVMWrapper("JVM_WaitForReferencePendingList");
3350   MonitorLockerEx ml(Heap_lock);
3351   while (!Universe::has_reference_pending_list()) {
3352     ml.wait();
3353   }
3354 JVM_END
3355 
3356 
3357 // ObjectInputStream ///////////////////////////////////////////////////////////////
3358 
3359 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3360   if (current_class == NULL) {
3361     return true;
3362   }
3363   if ((current_class == field_class) || access.is_public()) {
3364     return true;
3365   }
3366 
3367   if (access.is_protected()) {
3368     // See if current_class is a subclass of field_class
3369     if (current_class->is_subclass_of(field_class)) {
3370       return true;
3371     }
3372   }
3373 
3374   return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3375 }
3376 
3377 // Return the first user-defined class loader up the execution stack, or null
3378 // if only code from the bootstrap or platform class loader is on the stack.
3379 
3380 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3381   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3382     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3383     oop loader = vfst.method()->method_holder()->class_loader();
3384     if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3385       return JNIHandles::make_local(env, loader);
3386     }
3387   }
3388   return NULL;
3389 JVM_END
3390 
3391 
3392 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3393 
3394 
3395 // resolve array handle and check arguments
3396 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3397   if (arr == NULL) {
3398     THROW_0(vmSymbols::java_lang_NullPointerException());
3399   }
3400   oop a = JNIHandles::resolve_non_null(arr);
3401   if (!a->is_array()) {
3402     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3403   } else if (type_array_only && !a->is_typeArray()) {
3404     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3405   }
3406   return arrayOop(a);
3407 }
3408 
3409 
3410 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3411   JVMWrapper("JVM_GetArrayLength");
3412   arrayOop a = check_array(env, arr, false, CHECK_0);
3413   return a->length();
3414 JVM_END
3415 
3416 
3417 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3418   JVMWrapper("JVM_Array_Get");
3419   JvmtiVMObjectAllocEventCollector oam;
3420   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3421   jvalue value;
3422   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3423   oop box = Reflection::box(&value, type, CHECK_NULL);
3424   return JNIHandles::make_local(env, box);
3425 JVM_END
3426 
3427 
3428 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3429   JVMWrapper("JVM_GetPrimitiveArrayElement");
3430   jvalue value;
3431   value.i = 0; // to initialize value before getting used in CHECK
3432   arrayOop a = check_array(env, arr, true, CHECK_(value));
3433   assert(a->is_typeArray(), "just checking");
3434   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3435   BasicType wide_type = (BasicType) wCode;
3436   if (type != wide_type) {
3437     Reflection::widen(&value, type, wide_type, CHECK_(value));
3438   }
3439   return value;
3440 JVM_END
3441 
3442 
3443 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3444   JVMWrapper("JVM_SetArrayElement");
3445   arrayOop a = check_array(env, arr, false, CHECK);
3446   oop box = JNIHandles::resolve(val);
3447   jvalue value;
3448   value.i = 0; // to initialize value before getting used in CHECK
3449   BasicType value_type;
3450   if (a->is_objArray()) {
3451     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3452     value_type = Reflection::unbox_for_regular_object(box, &value);
3453   } else {
3454     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3455   }
3456   Reflection::array_set(&value, a, index, value_type, CHECK);
3457 JVM_END
3458 
3459 
3460 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3461   JVMWrapper("JVM_SetPrimitiveArrayElement");
3462   arrayOop a = check_array(env, arr, true, CHECK);
3463   assert(a->is_typeArray(), "just checking");
3464   BasicType value_type = (BasicType) vCode;
3465   Reflection::array_set(&v, a, index, value_type, CHECK);
3466 JVM_END
3467 
3468 
3469 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3470   JVMWrapper("JVM_NewArray");
3471   JvmtiVMObjectAllocEventCollector oam;
3472   oop element_mirror = JNIHandles::resolve(eltClass);
3473   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3474   return JNIHandles::make_local(env, result);
3475 JVM_END
3476 
3477 
3478 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3479   JVMWrapper("JVM_NewMultiArray");
3480   JvmtiVMObjectAllocEventCollector oam;
3481   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3482   oop element_mirror = JNIHandles::resolve(eltClass);
3483   assert(dim_array->is_typeArray(), "just checking");
3484   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3485   return JNIHandles::make_local(env, result);
3486 JVM_END
3487 
3488 
3489 // Library support ///////////////////////////////////////////////////////////////////////////
3490 
3491 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3492   //%note jvm_ct
3493   JVMWrapper("JVM_LoadLibrary");
3494   char ebuf[1024];
3495   void *load_result;
3496   {
3497     ThreadToNativeFromVM ttnfvm(thread);
3498     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3499   }
3500   if (load_result == NULL) {
3501     char msg[1024];
3502     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3503     // Since 'ebuf' may contain a string encoded using
3504     // platform encoding scheme, we need to pass
3505     // Exceptions::unsafe_to_utf8 to the new_exception method
3506     // as the last argument. See bug 6367357.
3507     Handle h_exception =
3508       Exceptions::new_exception(thread,
3509                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3510                                 msg, Exceptions::unsafe_to_utf8);
3511 
3512     THROW_HANDLE_0(h_exception);
3513   }
3514   return load_result;
3515 JVM_END
3516 
3517 
3518 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3519   JVMWrapper("JVM_UnloadLibrary");
3520   os::dll_unload(handle);
3521 JVM_END
3522 
3523 
3524 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3525   JVMWrapper("JVM_FindLibraryEntry");
3526   return os::dll_lookup(handle, name);
3527 JVM_END
3528 
3529 
3530 // JNI version ///////////////////////////////////////////////////////////////////////////////
3531 
3532 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3533   JVMWrapper("JVM_IsSupportedJNIVersion");
3534   return Threads::is_supported_jni_version_including_1_1(version);
3535 JVM_END
3536 
3537 
3538 // String support ///////////////////////////////////////////////////////////////////////////
3539 
3540 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3541   JVMWrapper("JVM_InternString");
3542   JvmtiVMObjectAllocEventCollector oam;
3543   if (str == NULL) return NULL;
3544   oop string = JNIHandles::resolve_non_null(str);
3545   oop result = StringTable::intern(string, CHECK_NULL);
3546   return (jstring) JNIHandles::make_local(env, result);
3547 JVM_END
3548 
3549 
3550 // Raw monitor support //////////////////////////////////////////////////////////////////////
3551 
3552 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3553 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3554 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3555 // that only works with java threads.
3556 
3557 
3558 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3559   VM_Exit::block_if_vm_exited();
3560   JVMWrapper("JVM_RawMonitorCreate");
3561   return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3562 }
3563 
3564 
3565 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3566   VM_Exit::block_if_vm_exited();
3567   JVMWrapper("JVM_RawMonitorDestroy");
3568   delete ((Mutex*) mon);
3569 }
3570 
3571 
3572 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3573   VM_Exit::block_if_vm_exited();
3574   JVMWrapper("JVM_RawMonitorEnter");
3575   ((Mutex*) mon)->jvm_raw_lock();
3576   return 0;
3577 }
3578 
3579 
3580 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3581   VM_Exit::block_if_vm_exited();
3582   JVMWrapper("JVM_RawMonitorExit");
3583   ((Mutex*) mon)->jvm_raw_unlock();
3584 }
3585 
3586 
3587 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3588 
3589 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3590                                     Handle loader, Handle protection_domain,
3591                                     jboolean throwError, TRAPS) {
3592   // Security Note:
3593   //   The Java level wrapper will perform the necessary security check allowing
3594   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
3595   //   the checkPackageAccess relative to the initiating class loader via the
3596   //   protection_domain. The protection_domain is passed as NULL by the java code
3597   //   if there is no security manager in 3-arg Class.forName().
3598   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3599 
3600   // Check if we should initialize the class
3601   if (init && klass->is_instance_klass()) {
3602     klass->initialize(CHECK_NULL);
3603   }
3604   return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3605 }
3606 
3607 
3608 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3609 
3610 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3611   JVMWrapper("JVM_InvokeMethod");
3612   Handle method_handle;
3613   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3614     method_handle = Handle(THREAD, JNIHandles::resolve(method));
3615     Handle receiver(THREAD, JNIHandles::resolve(obj));
3616     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3617     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3618     jobject res = JNIHandles::make_local(env, result);
3619     if (JvmtiExport::should_post_vm_object_alloc()) {
3620       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3621       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3622       if (java_lang_Class::is_primitive(ret_type)) {
3623         // Only for primitive type vm allocates memory for java object.
3624         // See box() method.
3625         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3626       }
3627     }
3628     return res;
3629   } else {
3630     THROW_0(vmSymbols::java_lang_StackOverflowError());
3631   }
3632 JVM_END
3633 
3634 
3635 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3636   JVMWrapper("JVM_NewInstanceFromConstructor");
3637   oop constructor_mirror = JNIHandles::resolve(c);
3638   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3639   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3640   jobject res = JNIHandles::make_local(env, result);
3641   if (JvmtiExport::should_post_vm_object_alloc()) {
3642     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3643   }
3644   return res;
3645 JVM_END
3646 
3647 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3648 
3649 JVM_LEAF(jboolean, JVM_SupportsCX8())
3650   JVMWrapper("JVM_SupportsCX8");
3651   return VM_Version::supports_cx8();
3652 JVM_END
3653 
3654 // Returns an array of all live Thread objects (VM internal JavaThreads,
3655 // jvmti agent threads, and JNI attaching threads  are skipped)
3656 // See CR 6404306 regarding JNI attaching threads
3657 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3658   ResourceMark rm(THREAD);
3659   ThreadsListEnumerator tle(THREAD, false, false);
3660   JvmtiVMObjectAllocEventCollector oam;
3661 
3662   int num_threads = tle.num_threads();
3663   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3664   objArrayHandle threads_ah(THREAD, r);
3665 
3666   for (int i = 0; i < num_threads; i++) {
3667     Handle h = tle.get_threadObj(i);
3668     threads_ah->obj_at_put(i, h());
3669   }
3670 
3671   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3672 JVM_END
3673 
3674 
3675 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3676 // Return StackTraceElement[][], each element is the stack trace of a thread in
3677 // the corresponding entry in the given threads array
3678 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3679   JVMWrapper("JVM_DumpThreads");
3680   JvmtiVMObjectAllocEventCollector oam;
3681 
3682   // Check if threads is null
3683   if (threads == NULL) {
3684     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3685   }
3686 
3687   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3688   objArrayHandle ah(THREAD, a);
3689   int num_threads = ah->length();
3690   // check if threads is non-empty array
3691   if (num_threads == 0) {
3692     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3693   }
3694 
3695   // check if threads is not an array of objects of Thread class
3696   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3697   if (k != SystemDictionary::Thread_klass()) {
3698     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3699   }
3700 
3701   ResourceMark rm(THREAD);
3702 
3703   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3704   for (int i = 0; i < num_threads; i++) {
3705     oop thread_obj = ah->obj_at(i);
3706     instanceHandle h(THREAD, (instanceOop) thread_obj);
3707     thread_handle_array->append(h);
3708   }
3709 
3710   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3711   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3712 
3713 JVM_END
3714 
3715 // JVM monitoring and management support
3716 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3717   return Management::get_jmm_interface(version);
3718 JVM_END
3719 
3720 // com.sun.tools.attach.VirtualMachine agent properties support
3721 //
3722 // Initialize the agent properties with the properties maintained in the VM
3723 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3724   JVMWrapper("JVM_InitAgentProperties");
3725   ResourceMark rm;
3726 
3727   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3728 
3729   PUTPROP(props, "sun.java.command", Arguments::java_command());
3730   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3731   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3732   return properties;
3733 JVM_END
3734 
3735 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3736 {
3737   JVMWrapper("JVM_GetEnclosingMethodInfo");
3738   JvmtiVMObjectAllocEventCollector oam;
3739 
3740   if (ofClass == NULL) {
3741     return NULL;
3742   }
3743   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3744   // Special handling for primitive objects
3745   if (java_lang_Class::is_primitive(mirror())) {
3746     return NULL;
3747   }
3748   Klass* k = java_lang_Class::as_Klass(mirror());
3749   if (!k->is_instance_klass()) {
3750     return NULL;
3751   }
3752   InstanceKlass* ik = InstanceKlass::cast(k);
3753   int encl_method_class_idx = ik->enclosing_method_class_index();
3754   if (encl_method_class_idx == 0) {
3755     return NULL;
3756   }
3757   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3758   objArrayHandle dest(THREAD, dest_o);
3759   Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3760   dest->obj_at_put(0, enc_k->java_mirror());
3761   int encl_method_method_idx = ik->enclosing_method_method_index();
3762   if (encl_method_method_idx != 0) {
3763     Symbol* sym = ik->constants()->symbol_at(
3764                         extract_low_short_from_int(
3765                           ik->constants()->name_and_type_at(encl_method_method_idx)));
3766     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3767     dest->obj_at_put(1, str());
3768     sym = ik->constants()->symbol_at(
3769               extract_high_short_from_int(
3770                 ik->constants()->name_and_type_at(encl_method_method_idx)));
3771     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3772     dest->obj_at_put(2, str());
3773   }
3774   return (jobjectArray) JNIHandles::make_local(dest());
3775 }
3776 JVM_END
3777 
3778 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3779 {
3780   memset(info, 0, info_size);
3781 
3782   info->jvm_version = Abstract_VM_Version::jvm_version();
3783   info->patch_version = Abstract_VM_Version::vm_patch_version();
3784 
3785   // when we add a new capability in the jvm_version_info struct, we should also
3786   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3787   // counter defined in runtimeService.cpp.
3788   info->is_attachable = AttachListener::is_attach_supported();
3789 }
3790 JVM_END
3791 
3792 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3793 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3794   ResourceMark rm(THREAD);
3795 
3796   if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3797     return NULL;
3798   }
3799 
3800   char** vm_flags = Arguments::jvm_flags_array();
3801   char** vm_args = Arguments::jvm_args_array();
3802   int num_flags = Arguments::num_jvm_flags();
3803   int num_args = Arguments::num_jvm_args();
3804 
3805   InstanceKlass* ik = SystemDictionary::String_klass();
3806   objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3807   objArrayHandle result_h(THREAD, r);
3808 
3809   int index = 0;
3810   for (int j = 0; j < num_flags; j++, index++) {
3811     Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3812     result_h->obj_at_put(index, h());
3813   }
3814   for (int i = 0; i < num_args; i++, index++) {
3815     Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3816     result_h->obj_at_put(index, h());
3817   }
3818   return (jobjectArray) JNIHandles::make_local(env, result_h());
3819 JVM_END
3820 
3821 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3822   return os::get_signal_number(name);
3823 JVM_END
--- EOF ---