2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 * This code is free software; you can redistribute it and/or modify it
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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).
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25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc_interface/collectedHeap.inline.hpp"
33 #include "memory/oopFactory.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/instanceKlass.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "prims/jvm.h"
38 #include "prims/jvm_misc.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "prims/jvmtiThreadState.hpp"
41 #include "prims/nativeLookup.hpp"
42 #include "prims/privilegedStack.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/dtraceJSDT.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/init.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/java.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/jfieldIDWorkaround.hpp"
51 #include "runtime/os.hpp"
52 #include "runtime/perfData.hpp"
53 #include "runtime/reflection.hpp"
54 #include "runtime/vframe.hpp"
55 #include "runtime/vm_operations.hpp"
56 #include "services/attachListener.hpp"
57 #include "services/management.hpp"
58 #include "services/threadService.hpp"
59 #include "utilities/copy.hpp"
60 #include "utilities/defaultStream.hpp"
61 #include "utilities/dtrace.hpp"
62 #include "utilities/events.hpp"
63 #include "utilities/histogram.hpp"
64 #include "utilities/top.hpp"
65 #include "utilities/utf8.hpp"
66 #ifdef TARGET_OS_FAMILY_linux
67 # include "jvm_linux.h"
69 #ifdef TARGET_OS_FAMILY_solaris
70 # include "jvm_solaris.h"
72 #ifdef TARGET_OS_FAMILY_windows
73 # include "jvm_windows.h"
78 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
79 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
80 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
83 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
84 such ctors and calls MUST NOT come between an oop declaration/init and its
85 usage because if objects are move this may cause various memory stomps, bus
86 errors and segfaults. Here is a cookbook for causing so called "naked oop
89 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
90 JVMWrapper("JVM_GetClassDeclaredFields");
92 // Object address to be held directly in mirror & not visible to GC
93 oop mirror = JNIHandles::resolve_non_null(ofClass);
95 // If this ctor can hit a safepoint, moving objects around, then
96 ComplexConstructor foo;
98 // Boom! mirror may point to JUNK instead of the intended object
99 (some dereference of mirror)
101 // Here's another call that may block for GC, making mirror stale
102 MutexLocker ml(some_lock);
104 // And here's an initializer that can result in a stale oop
106 oop o = call_that_can_throw_exception(TRAPS);
109 The solution is to keep the oop declaration BELOW the ctor or function
110 call that might cause a GC, do another resolve to reassign the oop, or
111 consider use of a Handle instead of an oop so there is immunity from object
112 motion. But note that the "QUICK" entries below do not have a handlemark
113 and thus can only support use of handles passed in.
116 static void trace_class_resolution_impl(klassOop to_class, TRAPS) {
118 int line_number = -1;
119 const char * source_file = NULL;
120 const char * trace = "explicit";
121 klassOop caller = NULL;
122 JavaThread* jthread = JavaThread::current();
123 if (jthread->has_last_Java_frame()) {
124 vframeStream vfst(jthread);
126 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
127 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
128 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
129 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
130 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
132 methodOop last_caller = NULL;
134 while (!vfst.at_end()) {
135 methodOop m = vfst.method();
136 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
137 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
138 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
144 // if this is called from Class.forName0 and that is called from Class.forName,
145 // then print the caller of Class.forName. If this is Class.loadClass, then print
146 // that caller, otherwise keep quiet since this should be picked up elsewhere.
147 bool found_it = false;
148 if (!vfst.at_end() &&
149 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
150 vfst.method()->name() == vmSymbols::forName0_name()) {
152 if (!vfst.at_end() &&
153 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
154 vfst.method()->name() == vmSymbols::forName_name()) {
158 } else if (last_caller != NULL &&
159 instanceKlass::cast(last_caller->method_holder())->name() ==
160 vmSymbols::java_lang_ClassLoader() &&
161 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
162 last_caller->name() == vmSymbols::loadClass_name())) {
164 } else if (!vfst.at_end()) {
165 if (vfst.method()->is_native()) {
170 if (found_it && !vfst.at_end()) {
172 caller = vfst.method()->method_holder();
173 line_number = vfst.method()->line_number_from_bci(vfst.bci());
174 if (line_number == -1) {
175 // show method name if it's a native method
176 trace = vfst.method()->name_and_sig_as_C_string();
178 Symbol* s = instanceKlass::cast(caller)->source_file_name();
180 source_file = s->as_C_string();
184 if (caller != NULL) {
185 if (to_class != caller) {
186 const char * from = Klass::cast(caller)->external_name();
187 const char * to = Klass::cast(to_class)->external_name();
188 // print in a single call to reduce interleaving between threads
189 if (source_file != NULL) {
190 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
192 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
198 void trace_class_resolution(klassOop to_class) {
200 trace_class_resolution_impl(to_class, THREAD);
201 if (HAS_PENDING_EXCEPTION) {
202 CLEAR_PENDING_EXCEPTION;
206 // Wrapper to trace JVM functions
209 class JVMTraceWrapper : public StackObj {
211 JVMTraceWrapper(const char* format, ...) {
214 va_start(ap, format);
216 tty->vprint_cr(format, ap);
222 Histogram* JVMHistogram;
223 volatile jint JVMHistogram_lock = 0;
225 class JVMHistogramElement : public HistogramElement {
227 JVMHistogramElement(const char* name);
230 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
234 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
235 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
237 if ( (WarnOnStalledSpinLock > 0)
238 && (count % WarnOnStalledSpinLock == 0)) {
239 warning("JVMHistogram_lock seems to be stalled");
244 if(JVMHistogram == NULL)
245 JVMHistogram = new Histogram("JVM Call Counts",100);
247 JVMHistogram->add_element(this);
248 Atomic::dec(&JVMHistogram_lock);
251 #define JVMCountWrapper(arg) \
252 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
253 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
255 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
256 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
257 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
258 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
260 #define JVMWrapper(arg1)
261 #define JVMWrapper2(arg1, arg2)
262 #define JVMWrapper3(arg1, arg2, arg3)
263 #define JVMWrapper4(arg1, arg2, arg3, arg4)
267 // Interface version /////////////////////////////////////////////////////////////////////
270 JVM_LEAF(jint, JVM_GetInterfaceVersion())
271 return JVM_INTERFACE_VERSION;
275 // java.lang.System //////////////////////////////////////////////////////////////////////
278 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
279 JVMWrapper("JVM_CurrentTimeMillis");
280 return os::javaTimeMillis();
283 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
284 JVMWrapper("JVM_NanoTime");
285 return os::javaTimeNanos();
289 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
290 jobject dst, jint dst_pos, jint length))
291 JVMWrapper("JVM_ArrayCopy");
292 // Check if we have null pointers
293 if (src == NULL || dst == NULL) {
294 THROW(vmSymbols::java_lang_NullPointerException());
296 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
297 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
298 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
299 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
301 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
305 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
306 JavaValue r(T_OBJECT);
307 // public synchronized Object put(Object key, Object value);
308 HandleMark hm(THREAD);
309 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
310 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
311 JavaCalls::call_virtual(&r,
313 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
314 vmSymbols::put_name(),
315 vmSymbols::object_object_object_signature(),
322 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
325 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
326 JVMWrapper("JVM_InitProperties");
329 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
331 // System property list includes both user set via -D option and
332 // jvm system specific properties.
333 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
334 PUTPROP(props, p->key(), p->value());
337 // Convert the -XX:MaxDirectMemorySize= command line flag
338 // to the sun.nio.MaxDirectMemorySize property.
339 // Do this after setting user properties to prevent people
340 // from setting the value with a -D option, as requested.
343 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize);
344 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
347 // JVM monitoring and management support
348 // Add the sun.management.compiler property for the compiler's name
351 #if defined(_LP64) || defined(_WIN64)
352 #define CSIZE "64-Bit "
358 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
360 #if defined(COMPILER1)
361 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
362 #elif defined(COMPILER2)
363 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
365 const char* compiler_name = "";
369 if (*compiler_name != '\0' &&
370 (Arguments::mode() != Arguments::_int)) {
371 PUTPROP(props, "sun.management.compiler", compiler_name);
379 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
381 extern volatile jint vm_created;
383 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
384 if (vm_created != 0 && (code == 0)) {
385 // The VM is about to exit. We call back into Java to check whether finalizers should be run
386 Universe::run_finalizers_on_exit();
393 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
399 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
400 register_on_exit_function(func);
404 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
405 JVMWrapper("JVM_GC");
406 if (!DisableExplicitGC) {
407 Universe::heap()->collect(GCCause::_java_lang_system_gc);
412 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
413 JVMWrapper("JVM_MaxObjectInspectionAge");
414 return Universe::heap()->millis_since_last_gc();
418 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
419 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
423 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
424 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
427 static inline jlong convert_size_t_to_jlong(size_t val) {
428 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
429 NOT_LP64 (return (jlong)val;)
430 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
433 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
434 JVMWrapper("JVM_TotalMemory");
435 size_t n = Universe::heap()->capacity();
436 return convert_size_t_to_jlong(n);
440 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
441 JVMWrapper("JVM_FreeMemory");
442 CollectedHeap* ch = Universe::heap();
445 MutexLocker x(Heap_lock);
446 n = ch->capacity() - ch->used();
448 return convert_size_t_to_jlong(n);
452 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
453 JVMWrapper("JVM_MaxMemory");
454 size_t n = Universe::heap()->max_capacity();
455 return convert_size_t_to_jlong(n);
459 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
460 JVMWrapper("JVM_ActiveProcessorCount");
461 return os::active_processor_count();
466 // java.lang.Throwable //////////////////////////////////////////////////////
469 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
470 JVMWrapper("JVM_FillInStackTrace");
471 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
472 java_lang_Throwable::fill_in_stack_trace(exception);
476 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
477 JVMWrapper("JVM_PrintStackTrace");
478 // Note: This is no longer used in Merlin, but we still support it for compatibility.
479 oop exception = JNIHandles::resolve_non_null(receiver);
480 oop stream = JNIHandles::resolve_non_null(printable);
481 java_lang_Throwable::print_stack_trace(exception, stream);
485 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
486 JVMWrapper("JVM_GetStackTraceDepth");
487 oop exception = JNIHandles::resolve(throwable);
488 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
492 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
493 JVMWrapper("JVM_GetStackTraceElement");
494 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
495 oop exception = JNIHandles::resolve(throwable);
496 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
497 return JNIHandles::make_local(env, element);
501 // java.lang.Object ///////////////////////////////////////////////
504 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
505 JVMWrapper("JVM_IHashCode");
506 // as implemented in the classic virtual machine; return 0 if object is NULL
507 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
511 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
512 JVMWrapper("JVM_MonitorWait");
513 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
514 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
515 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
516 if (JvmtiExport::should_post_monitor_wait()) {
517 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
519 ObjectSynchronizer::wait(obj, ms, CHECK);
523 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
524 JVMWrapper("JVM_MonitorNotify");
525 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
526 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
527 ObjectSynchronizer::notify(obj, CHECK);
531 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
532 JVMWrapper("JVM_MonitorNotifyAll");
533 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
534 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
535 ObjectSynchronizer::notifyall(obj, CHECK);
539 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
540 JVMWrapper("JVM_Clone");
541 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
542 const KlassHandle klass (THREAD, obj->klass());
543 JvmtiVMObjectAllocEventCollector oam;
546 // Just checking that the cloneable flag is set correct
547 if (obj->is_javaArray()) {
548 guarantee(klass->is_cloneable(), "all arrays are cloneable");
550 guarantee(obj->is_instance(), "should be instanceOop");
551 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
552 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
556 // Check if class of obj supports the Cloneable interface.
557 // All arrays are considered to be cloneable (See JLS 20.1.5)
558 if (!klass->is_cloneable()) {
559 ResourceMark rm(THREAD);
560 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
563 // Make shallow object copy
564 const int size = obj->size();
566 if (obj->is_javaArray()) {
567 const int length = ((arrayOop)obj())->length();
568 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
570 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
572 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
573 // is modifying a reference field in the clonee, a non-oop-atomic copy might
574 // be suspended in the middle of copying the pointer and end up with parts
575 // of two different pointers in the field. Subsequent dereferences will crash.
576 // 4846409: an oop-copy of objects with long or double fields or arrays of same
577 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
578 // of oops. We know objects are aligned on a minimum of an jlong boundary.
579 // The same is true of StubRoutines::object_copy and the various oop_copy
580 // variants, and of the code generated by the inline_native_clone intrinsic.
581 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
582 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
583 (size_t)align_object_size(size) / HeapWordsPerLong);
585 new_obj->init_mark();
587 // Store check (mark entire object and let gc sort it out)
588 BarrierSet* bs = Universe::heap()->barrier_set();
589 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
590 bs->write_region(MemRegion((HeapWord*)new_obj, size));
592 // Caution: this involves a java upcall, so the clone should be
593 // "gc-robust" by this stage.
594 if (klass->has_finalizer()) {
595 assert(obj->is_instance(), "should be instanceOop");
596 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
599 return JNIHandles::make_local(env, oop(new_obj));
602 // java.lang.Compiler ////////////////////////////////////////////////////
604 // The initial cuts of the HotSpot VM will not support JITs, and all existing
605 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
606 // functions are all silently ignored unless JVM warnings are printed.
608 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
609 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
613 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
614 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
619 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
620 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
625 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
626 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
631 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
632 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
637 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
638 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
642 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
643 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
648 // Error message support //////////////////////////////////////////////////////
650 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
651 JVMWrapper("JVM_GetLastErrorString");
652 return (jint)os::lasterror(buf, len);
656 // java.io.File ///////////////////////////////////////////////////////////////
658 JVM_LEAF(char*, JVM_NativePath(char* path))
659 JVMWrapper2("JVM_NativePath (%s)", path);
660 return os::native_path(path);
664 // Misc. class handling ///////////////////////////////////////////////////////////
667 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
668 JVMWrapper("JVM_GetCallerClass");
669 klassOop k = thread->security_get_caller_class(depth);
670 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
674 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
675 JVMWrapper("JVM_FindPrimitiveClass");
677 BasicType t = name2type(utf);
678 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
679 mirror = Universe::java_mirror(t);
681 if (mirror == NULL) {
682 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
684 return (jclass) JNIHandles::make_local(env, mirror);
689 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
690 JVMWrapper("JVM_ResolveClass");
691 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
695 // Returns a class loaded by the bootstrap class loader; or null
696 // if not found. ClassNotFoundException is not thrown.
698 // Rationale behind JVM_FindClassFromBootLoader
699 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
700 // b> because of (a) java.dll has a direct dependecy on the unexported
701 // private symbol "_JVM_FindClassFromClassLoader@20".
702 // c> the launcher cannot use the private symbol as it dynamically opens
703 // the entry point, so if something changes, the launcher will fail
704 // unexpectedly at runtime, it is safest for the launcher to dlopen a
705 // stable exported interface.
706 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
707 // signature to change from _JVM_FindClassFromClassLoader@20 to
708 // JVM_FindClassFromClassLoader and will not be backward compatible
710 // Thus a public/stable exported entry point is the right solution,
711 // public here means public in linker semantics, and is exported only
712 // to the JDK, and is not intended to be a public API.
714 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
716 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
718 // Java libraries should ensure that name is never null...
719 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
720 // It's impossible to create this class; the name cannot fit
721 // into the constant pool.
725 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
726 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
731 if (TraceClassResolution) {
732 trace_class_resolution(k);
734 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
737 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
738 jboolean init, jobject loader,
739 jboolean throwError))
740 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
741 throwError ? "error" : "exception");
742 // Java libraries should ensure that name is never null...
743 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
744 // It's impossible to create this class; the name cannot fit
745 // into the constant pool.
747 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
749 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
752 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
753 Handle h_loader(THREAD, JNIHandles::resolve(loader));
754 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
755 Handle(), throwError, THREAD);
757 if (TraceClassResolution && result != NULL) {
758 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
764 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
765 jboolean init, jclass from))
766 JVMWrapper2("JVM_FindClassFromClass %s", name);
767 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
768 // It's impossible to create this class; the name cannot fit
769 // into the constant pool.
770 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
772 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
773 oop from_class_oop = JNIHandles::resolve(from);
774 klassOop from_class = (from_class_oop == NULL)
776 : java_lang_Class::as_klassOop(from_class_oop);
777 oop class_loader = NULL;
778 oop protection_domain = NULL;
779 if (from_class != NULL) {
780 class_loader = Klass::cast(from_class)->class_loader();
781 protection_domain = Klass::cast(from_class)->protection_domain();
783 Handle h_loader(THREAD, class_loader);
784 Handle h_prot (THREAD, protection_domain);
785 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
786 h_prot, true, thread);
788 if (TraceClassResolution && result != NULL) {
789 // this function is generally only used for class loading during verification.
791 oop from_mirror = JNIHandles::resolve_non_null(from);
792 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
793 const char * from_name = Klass::cast(from_class)->external_name();
795 oop mirror = JNIHandles::resolve_non_null(result);
796 klassOop to_class = java_lang_Class::as_klassOop(mirror);
797 const char * to = Klass::cast(to_class)->external_name();
798 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
804 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
805 if (loader.is_null()) {
809 // check whether the current caller thread holds the lock or not.
810 // If not, increment the corresponding counter
811 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
812 ObjectSynchronizer::owner_self) {
817 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
818 // and JVM_DefineClassWithSourceCond()
819 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
820 jobject loader, const jbyte *buf,
821 jsize len, jobject pd, const char *source,
822 jboolean verify, TRAPS) {
823 if (source == NULL) source = "__JVM_DefineClass__";
825 assert(THREAD->is_Java_thread(), "must be a JavaThread");
826 JavaThread* jt = (JavaThread*) THREAD;
828 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
829 ClassLoader::perf_define_appclass_selftime(),
830 ClassLoader::perf_define_appclasses(),
831 jt->get_thread_stat()->perf_recursion_counts_addr(),
832 jt->get_thread_stat()->perf_timers_addr(),
833 PerfClassTraceTime::DEFINE_CLASS);
836 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
839 // Since exceptions can be thrown, class initialization can take place
840 // if name is NULL no check for class name in .class stream has to be made.
841 TempNewSymbol class_name = NULL;
843 const int str_len = (int)strlen(name);
844 if (str_len > Symbol::max_length()) {
845 // It's impossible to create this class; the name cannot fit
846 // into the constant pool.
847 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
849 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
852 ResourceMark rm(THREAD);
853 ClassFileStream st((u1*) buf, len, (char *)source);
854 Handle class_loader (THREAD, JNIHandles::resolve(loader));
856 is_lock_held_by_thread(class_loader,
857 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
860 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
861 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
862 protection_domain, &st,
866 if (TraceClassResolution && k != NULL) {
867 trace_class_resolution(k);
870 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
874 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
875 JVMWrapper2("JVM_DefineClass %s", name);
877 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
881 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
882 JVMWrapper2("JVM_DefineClassWithSource %s", name);
884 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
887 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
888 jobject loader, const jbyte *buf,
889 jsize len, jobject pd,
890 const char *source, jboolean verify))
891 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
893 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
896 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
897 JVMWrapper("JVM_FindLoadedClass");
898 ResourceMark rm(THREAD);
900 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
901 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
903 const char* str = java_lang_String::as_utf8_string(string());
904 // Sanity check, don't expect null
905 if (str == NULL) return NULL;
907 const int str_len = (int)strlen(str);
908 if (str_len > Symbol::max_length()) {
909 // It's impossible to create this class; the name cannot fit
910 // into the constant pool.
913 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
916 // The Java level wrapper will perform the necessary security check allowing
917 // us to pass the NULL as the initiating class loader.
918 Handle h_loader(THREAD, JNIHandles::resolve(loader));
920 is_lock_held_by_thread(h_loader,
921 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
925 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
930 return (k == NULL) ? NULL :
931 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
935 // Reflection support //////////////////////////////////////////////////////////////////////////////
937 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
938 assert (cls != NULL, "illegal class");
939 JVMWrapper("JVM_GetClassName");
940 JvmtiVMObjectAllocEventCollector oam;
941 ResourceMark rm(THREAD);
943 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
944 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
946 // Consider caching interned string in Klass
947 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
948 assert(k->is_klass(), "just checking");
949 name = Klass::cast(k)->external_name();
951 oop result = StringTable::intern((char*) name, CHECK_NULL);
952 return (jstring) JNIHandles::make_local(env, result);
956 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
957 JVMWrapper("JVM_GetClassInterfaces");
958 JvmtiVMObjectAllocEventCollector oam;
959 oop mirror = JNIHandles::resolve_non_null(cls);
961 // Special handling for primitive objects
962 if (java_lang_Class::is_primitive(mirror)) {
963 // Primitive objects does not have any interfaces
964 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
965 return (jobjectArray) JNIHandles::make_local(env, r);
968 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
969 // Figure size of result array
971 if (klass->oop_is_instance()) {
972 size = instanceKlass::cast(klass())->local_interfaces()->length();
974 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
978 // Allocate result array
979 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
980 objArrayHandle result (THREAD, r);
982 if (klass->oop_is_instance()) {
983 // Regular instance klass, fill in all local interfaces
984 for (int index = 0; index < size; index++) {
985 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
986 result->obj_at_put(index, Klass::cast(k)->java_mirror());
989 // All arrays implement java.lang.Cloneable and java.io.Serializable
990 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror());
991 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror());
993 return (jobjectArray) JNIHandles::make_local(env, result());
997 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
998 JVMWrapper("JVM_GetClassLoader");
999 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1002 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1003 oop loader = Klass::cast(k)->class_loader();
1004 return JNIHandles::make_local(env, loader);
1008 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1009 JVMWrapper("JVM_IsInterface");
1010 oop mirror = JNIHandles::resolve_non_null(cls);
1011 if (java_lang_Class::is_primitive(mirror)) {
1014 klassOop k = java_lang_Class::as_klassOop(mirror);
1015 jboolean result = Klass::cast(k)->is_interface();
1016 assert(!result || Klass::cast(k)->oop_is_instance(),
1017 "all interfaces are instance types");
1018 // The compiler intrinsic for isInterface tests the
1019 // Klass::_access_flags bits in the same way.
1024 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1025 JVMWrapper("JVM_GetClassSigners");
1026 JvmtiVMObjectAllocEventCollector oam;
1027 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1028 // There are no signers for primitive types
1032 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1033 objArrayOop signers = NULL;
1034 if (Klass::cast(k)->oop_is_instance()) {
1035 signers = instanceKlass::cast(k)->signers();
1038 // If there are no signers set in the class, or if the class
1039 // is an array, return NULL.
1040 if (signers == NULL) return NULL;
1042 // copy of the signers array
1043 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
1044 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1045 for (int index = 0; index < signers->length(); index++) {
1046 signers_copy->obj_at_put(index, signers->obj_at(index));
1050 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1054 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1055 JVMWrapper("JVM_SetClassSigners");
1056 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1057 // This call is ignored for primitive types and arrays.
1058 // Signers are only set once, ClassLoader.java, and thus shouldn't
1059 // be called with an array. Only the bootstrap loader creates arrays.
1060 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1061 if (Klass::cast(k)->oop_is_instance()) {
1062 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1068 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1069 JVMWrapper("JVM_GetProtectionDomain");
1070 if (JNIHandles::resolve(cls) == NULL) {
1071 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1074 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1075 // Primitive types does not have a protection domain.
1079 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1080 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1084 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1085 // still defined in core libraries as of 1.5.
1086 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1087 JVMWrapper("JVM_SetProtectionDomain");
1088 if (JNIHandles::resolve(cls) == NULL) {
1089 THROW(vmSymbols::java_lang_NullPointerException());
1091 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1092 // Call is ignored for primitive types
1093 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1095 // cls won't be an array, as this called only from ClassLoader.defineClass
1096 if (Klass::cast(k)->oop_is_instance()) {
1097 oop pd = JNIHandles::resolve(protection_domain);
1098 assert(pd == NULL || pd->is_oop(), "just checking");
1099 instanceKlass::cast(k)->set_protection_domain(pd);
1105 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1106 JVMWrapper("JVM_DoPrivileged");
1108 if (action == NULL) {
1109 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1112 // Stack allocated list of privileged stack elements
1113 PrivilegedElement pi;
1115 // Check that action object understands "Object run()"
1116 Handle object (THREAD, JNIHandles::resolve(action));
1119 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1120 vmSymbols::run_method_name(),
1121 vmSymbols::void_object_signature());
1122 methodHandle m (THREAD, m_oop);
1123 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1124 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1127 // Compute the frame initiating the do privileged operation and setup the privileged stack
1128 vframeStream vfst(thread);
1129 vfst.security_get_caller_frame(1);
1131 if (!vfst.at_end()) {
1132 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1133 thread->set_privileged_stack_top(&pi);
1137 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1138 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1139 Handle pending_exception;
1140 JavaValue result(T_OBJECT);
1141 JavaCallArguments args(object);
1142 JavaCalls::call(&result, m, &args, THREAD);
1144 // done with action, remove ourselves from the list
1145 if (!vfst.at_end()) {
1146 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1147 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1150 if (HAS_PENDING_EXCEPTION) {
1151 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1152 CLEAR_PENDING_EXCEPTION;
1154 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1155 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1156 // Throw a java.security.PrivilegedActionException(Exception e) exception
1157 JavaCallArguments args(pending_exception);
1158 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1159 vmSymbols::exception_void_signature(),
1164 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1165 return JNIHandles::make_local(env, (oop) result.get_jobject());
1169 // Returns the inherited_access_control_context field of the running thread.
1170 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1171 JVMWrapper("JVM_GetInheritedAccessControlContext");
1172 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1173 return JNIHandles::make_local(env, result);
1176 class RegisterArrayForGC {
1178 JavaThread *_thread;
1180 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1182 _thread->register_array_for_gc(array);
1185 ~RegisterArrayForGC() {
1186 _thread->register_array_for_gc(NULL);
1191 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1192 JVMWrapper("JVM_GetStackAccessControlContext");
1193 if (!UsePrivilegedStack) return NULL;
1195 ResourceMark rm(THREAD);
1196 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1197 JvmtiVMObjectAllocEventCollector oam;
1199 // count the protection domains on the execution stack. We collapse
1200 // duplicate consecutive protection domains into a single one, as
1201 // well as stopping when we hit a privileged frame.
1203 // Use vframeStream to iterate through Java frames
1204 vframeStream vfst(thread);
1206 oop previous_protection_domain = NULL;
1207 Handle privileged_context(thread, NULL);
1208 bool is_privileged = false;
1209 oop protection_domain = NULL;
1211 for(; !vfst.at_end(); vfst.next()) {
1212 // get method of frame
1213 methodOop method = vfst.method();
1214 intptr_t* frame_id = vfst.frame_id();
1216 // check the privileged frames to see if we have a match
1217 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1218 // this frame is privileged
1219 is_privileged = true;
1220 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1221 protection_domain = thread->privileged_stack_top()->protection_domain();
1223 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1226 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1227 local_array->push(protection_domain);
1228 previous_protection_domain = protection_domain;
1231 if (is_privileged) break;
1235 // either all the domains on the stack were system domains, or
1236 // we had a privileged system domain
1237 if (local_array->is_empty()) {
1238 if (is_privileged && privileged_context.is_null()) return NULL;
1240 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1241 return JNIHandles::make_local(env, result);
1244 // the resource area must be registered in case of a gc
1245 RegisterArrayForGC ragc(thread, local_array);
1246 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1247 local_array->length(), CHECK_NULL);
1248 objArrayHandle h_context(thread, context);
1249 for (int index = 0; index < local_array->length(); index++) {
1250 h_context->obj_at_put(index, local_array->at(index));
1253 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1255 return JNIHandles::make_local(env, result);
1259 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1260 JVMWrapper("JVM_IsArrayClass");
1261 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1262 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1266 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1267 JVMWrapper("JVM_IsPrimitiveClass");
1268 oop mirror = JNIHandles::resolve_non_null(cls);
1269 return (jboolean) java_lang_Class::is_primitive(mirror);
1273 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1274 JVMWrapper("JVM_GetComponentType");
1275 oop mirror = JNIHandles::resolve_non_null(cls);
1276 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1277 return (jclass) JNIHandles::make_local(env, result);
1281 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1282 JVMWrapper("JVM_GetClassModifiers");
1283 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1285 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1288 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1289 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1290 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1291 return k->modifier_flags();
1295 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1297 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1298 const int inner_class_info_index = 0;
1299 const int outer_class_info_index = 1;
1301 JvmtiVMObjectAllocEventCollector oam;
1302 // ofClass is a reference to a java_lang_Class object. The mirror object
1303 // of an instanceKlass
1305 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1306 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1307 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1308 return (jobjectArray)JNIHandles::make_local(env, result);
1311 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1313 if (k->inner_classes()->length() == 0) {
1314 // Neither an inner nor outer class
1315 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1316 return (jobjectArray)JNIHandles::make_local(env, result);
1319 // find inner class info
1320 typeArrayHandle icls(thread, k->inner_classes());
1321 constantPoolHandle cp(thread, k->constants());
1322 int length = icls->length();
1324 // Allocate temp. result array
1325 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1326 objArrayHandle result (THREAD, r);
1329 for(int i = 0; i < length; i += 4) {
1330 int ioff = icls->ushort_at(i + inner_class_info_index);
1331 int ooff = icls->ushort_at(i + outer_class_info_index);
1333 if (ioff != 0 && ooff != 0) {
1334 // Check to see if the name matches the class we're looking for
1335 // before attempting to find the class.
1336 if (cp->klass_name_at_matches(k, ooff)) {
1337 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1338 if (outer_klass == k()) {
1339 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1340 instanceKlassHandle inner_klass (THREAD, ik);
1342 // Throws an exception if outer klass has not declared k as
1344 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1346 result->obj_at_put(members, inner_klass->java_mirror());
1353 if (members != length) {
1354 // Return array of right length
1355 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1356 for(int i = 0; i < members; i++) {
1357 res->obj_at_put(i, result->obj_at(i));
1359 return (jobjectArray)JNIHandles::make_local(env, res);
1362 return (jobjectArray)JNIHandles::make_local(env, result());
1366 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1368 // ofClass is a reference to a java_lang_Class object.
1369 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1370 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1374 bool inner_is_member = false;
1375 klassOop outer_klass
1376 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1377 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1378 if (outer_klass == NULL) return NULL; // already a top-level class
1379 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1380 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1384 // should be in instanceKlass.cpp, but is here for historical reasons
1385 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1386 bool* inner_is_member,
1388 Thread* thread = THREAD;
1389 const int inner_class_info_index = inner_class_inner_class_info_offset;
1390 const int outer_class_info_index = inner_class_outer_class_info_offset;
1392 if (k->inner_classes()->length() == 0) {
1393 // No inner class info => no declaring class
1397 typeArrayHandle i_icls(thread, k->inner_classes());
1398 constantPoolHandle i_cp(thread, k->constants());
1399 int i_length = i_icls->length();
1403 instanceKlassHandle outer_klass;
1404 *inner_is_member = false;
1406 // Find inner_klass attribute
1407 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) {
1408 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1409 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1410 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset);
1412 // Check to see if the name matches the class we're looking for
1413 // before attempting to find the class.
1414 if (i_cp->klass_name_at_matches(k, ioff)) {
1415 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1416 found = (k() == inner_klass);
1417 if (found && ooff != 0) {
1418 ok = i_cp->klass_at(ooff, CHECK_NULL);
1419 outer_klass = instanceKlassHandle(thread, ok);
1420 *inner_is_member = true;
1426 if (found && outer_klass.is_null()) {
1427 // It may be anonymous; try for that.
1428 int encl_method_class_idx = k->enclosing_method_class_index();
1429 if (encl_method_class_idx != 0) {
1430 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1431 outer_klass = instanceKlassHandle(thread, ok);
1432 *inner_is_member = false;
1436 // If no inner class attribute found for this class.
1437 if (outer_klass.is_null()) return NULL;
1439 // Throws an exception if outer klass has not declared k as an inner klass
1440 // We need evidence that each klass knows about the other, or else
1441 // the system could allow a spoof of an inner class to gain access rights.
1442 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1443 return outer_klass();
1446 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1447 assert (cls != NULL, "illegal class");
1448 JVMWrapper("JVM_GetClassSignature");
1449 JvmtiVMObjectAllocEventCollector oam;
1450 ResourceMark rm(THREAD);
1451 // Return null for arrays and primatives
1452 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1453 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1454 if (Klass::cast(k)->oop_is_instance()) {
1455 Symbol* sym = instanceKlass::cast(k)->generic_signature();
1456 if (sym == NULL) return NULL;
1457 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1458 return (jstring) JNIHandles::make_local(env, str());
1465 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1466 assert (cls != NULL, "illegal class");
1467 JVMWrapper("JVM_GetClassAnnotations");
1468 ResourceMark rm(THREAD);
1469 // Return null for arrays and primitives
1470 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1471 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1472 if (Klass::cast(k)->oop_is_instance()) {
1473 return (jbyteArray) JNIHandles::make_local(env,
1474 instanceKlass::cast(k)->class_annotations());
1481 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1482 assert(field != NULL, "illegal field");
1483 JVMWrapper("JVM_GetFieldAnnotations");
1485 // some of this code was adapted from from jni_FromReflectedField
1487 // field is a handle to a java.lang.reflect.Field object
1488 oop reflected = JNIHandles::resolve_non_null(field);
1489 oop mirror = java_lang_reflect_Field::clazz(reflected);
1490 klassOop k = java_lang_Class::as_klassOop(mirror);
1491 int slot = java_lang_reflect_Field::slot(reflected);
1492 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1495 KlassHandle kh(THREAD, k);
1496 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot);
1498 if (modifiers & JVM_ACC_STATIC) {
1499 // for static fields we only look in the current class
1500 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1502 assert(false, "cannot find static field");
1503 return NULL; // robustness
1506 // for instance fields we start with the current class and work
1507 // our way up through the superclass chain
1508 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1510 assert(false, "cannot find instance field");
1511 return NULL; // robustness
1515 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1519 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1520 // some of this code was adapted from from jni_FromReflectedMethod
1522 oop reflected = JNIHandles::resolve_non_null(method);
1526 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1527 mirror = java_lang_reflect_Constructor::clazz(reflected);
1528 slot = java_lang_reflect_Constructor::slot(reflected);
1530 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1532 mirror = java_lang_reflect_Method::clazz(reflected);
1533 slot = java_lang_reflect_Method::slot(reflected);
1535 klassOop k = java_lang_Class::as_klassOop(mirror);
1537 KlassHandle kh(THREAD, k);
1538 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1540 assert(false, "cannot find method");
1541 return NULL; // robustness
1548 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1549 JVMWrapper("JVM_GetMethodAnnotations");
1551 // method is a handle to a java.lang.reflect.Method object
1552 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1553 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1557 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1558 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1560 // method is a handle to a java.lang.reflect.Method object
1561 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1562 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1566 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1567 JVMWrapper("JVM_GetMethodParameterAnnotations");
1569 // method is a handle to a java.lang.reflect.Method object
1570 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1571 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1575 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1577 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1579 JVMWrapper("JVM_GetClassDeclaredFields");
1580 JvmtiVMObjectAllocEventCollector oam;
1582 // Exclude primitive types and array types
1583 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1584 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1585 // Return empty array
1586 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1587 return (jobjectArray) JNIHandles::make_local(env, res);
1590 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1591 constantPoolHandle cp(THREAD, k->constants());
1593 // Ensure class is linked
1594 k->link_class(CHECK_NULL);
1596 typeArrayHandle fields(THREAD, k->fields());
1597 int fields_len = fields->length();
1599 // 4496456 We need to filter out java.lang.Throwable.backtrace
1600 bool skip_backtrace = false;
1607 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) {
1608 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1609 if (mods & JVM_ACC_PUBLIC) ++num_fields;
1612 num_fields = fields_len / instanceKlass::next_offset;
1614 if (k() == SystemDictionary::Throwable_klass()) {
1616 skip_backtrace = true;
1620 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1621 objArrayHandle result (THREAD, r);
1625 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) {
1626 if (skip_backtrace) {
1627 // 4496456 skip java.lang.Throwable.backtrace
1628 int offset = k->offset_from_fields(i);
1629 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1632 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1633 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) {
1634 fd.initialize(k(), i);
1635 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1636 result->obj_at_put(out_idx, field);
1640 assert(out_idx == num_fields, "just checking");
1641 return (jobjectArray) JNIHandles::make_local(env, result());
1645 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1647 JVMWrapper("JVM_GetClassDeclaredMethods");
1648 JvmtiVMObjectAllocEventCollector oam;
1650 // Exclude primitive types and array types
1651 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1652 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1653 // Return empty array
1654 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1655 return (jobjectArray) JNIHandles::make_local(env, res);
1658 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1660 // Ensure class is linked
1661 k->link_class(CHECK_NULL);
1663 objArrayHandle methods (THREAD, k->methods());
1664 int methods_length = methods->length();
1665 int num_methods = 0;
1668 for (i = 0; i < methods_length; i++) {
1669 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1670 if (!method->is_initializer()) {
1671 if (!publicOnly || method->is_public()) {
1678 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1679 objArrayHandle result (THREAD, r);
1682 for (i = 0; i < methods_length; i++) {
1683 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1684 if (!method->is_initializer()) {
1685 if (!publicOnly || method->is_public()) {
1686 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1687 result->obj_at_put(out_idx, m);
1692 assert(out_idx == num_methods, "just checking");
1693 return (jobjectArray) JNIHandles::make_local(env, result());
1697 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1699 JVMWrapper("JVM_GetClassDeclaredConstructors");
1700 JvmtiVMObjectAllocEventCollector oam;
1702 // Exclude primitive types and array types
1703 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1704 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1705 // Return empty array
1706 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1707 return (jobjectArray) JNIHandles::make_local(env, res);
1710 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1712 // Ensure class is linked
1713 k->link_class(CHECK_NULL);
1715 objArrayHandle methods (THREAD, k->methods());
1716 int methods_length = methods->length();
1717 int num_constructors = 0;
1720 for (i = 0; i < methods_length; i++) {
1721 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1722 if (method->is_initializer() && !method->is_static()) {
1723 if (!publicOnly || method->is_public()) {
1730 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1731 objArrayHandle result(THREAD, r);
1734 for (i = 0; i < methods_length; i++) {
1735 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1736 if (method->is_initializer() && !method->is_static()) {
1737 if (!publicOnly || method->is_public()) {
1738 oop m = Reflection::new_constructor(method, CHECK_NULL);
1739 result->obj_at_put(out_idx, m);
1744 assert(out_idx == num_constructors, "just checking");
1745 return (jobjectArray) JNIHandles::make_local(env, result());
1749 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1751 JVMWrapper("JVM_GetClassAccessFlags");
1752 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1754 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1757 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1758 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1763 // Constant pool access //////////////////////////////////////////////////////////
1765 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1767 JVMWrapper("JVM_GetClassConstantPool");
1768 JvmtiVMObjectAllocEventCollector oam;
1770 // Return null for primitives and arrays
1771 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1772 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1773 if (Klass::cast(k)->oop_is_instance()) {
1774 instanceKlassHandle k_h(THREAD, k);
1775 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1776 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1777 return JNIHandles::make_local(jcp());
1785 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1787 JVMWrapper("JVM_ConstantPoolGetSize");
1788 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1789 return cp->length();
1794 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1795 if (!cp->is_within_bounds(index)) {
1796 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1801 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1803 JVMWrapper("JVM_ConstantPoolGetClassAt");
1804 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1805 bounds_check(cp, index, CHECK_NULL);
1806 constantTag tag = cp->tag_at(index);
1807 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1808 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1810 klassOop k = cp->klass_at(index, CHECK_NULL);
1811 return (jclass) JNIHandles::make_local(k->java_mirror());
1816 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1818 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1819 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1820 bounds_check(cp, index, CHECK_NULL);
1821 constantTag tag = cp->tag_at(index);
1822 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1823 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1825 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1826 if (k == NULL) return NULL;
1827 return (jclass) JNIHandles::make_local(k->java_mirror());
1831 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1832 constantTag tag = cp->tag_at(index);
1833 if (!tag.is_method() && !tag.is_interface_method()) {
1834 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1836 int klass_ref = cp->uncached_klass_ref_index_at(index);
1838 if (force_resolution) {
1839 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1841 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1842 if (k_o == NULL) return NULL;
1844 instanceKlassHandle k(THREAD, k_o);
1845 Symbol* name = cp->uncached_name_ref_at(index);
1846 Symbol* sig = cp->uncached_signature_ref_at(index);
1847 methodHandle m (THREAD, k->find_method(name, sig));
1849 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1852 if (!m->is_initializer() || m->is_static()) {
1853 method = Reflection::new_method(m, true, true, CHECK_NULL);
1855 method = Reflection::new_constructor(m, CHECK_NULL);
1857 return JNIHandles::make_local(method);
1860 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1862 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1863 JvmtiVMObjectAllocEventCollector oam;
1864 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1865 bounds_check(cp, index, CHECK_NULL);
1866 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1871 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1873 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1874 JvmtiVMObjectAllocEventCollector oam;
1875 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1876 bounds_check(cp, index, CHECK_NULL);
1877 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1882 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1883 constantTag tag = cp->tag_at(index);
1884 if (!tag.is_field()) {
1885 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1887 int klass_ref = cp->uncached_klass_ref_index_at(index);
1889 if (force_resolution) {
1890 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1892 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1893 if (k_o == NULL) return NULL;
1895 instanceKlassHandle k(THREAD, k_o);
1896 Symbol* name = cp->uncached_name_ref_at(index);
1897 Symbol* sig = cp->uncached_signature_ref_at(index);
1899 klassOop target_klass = k->find_field(name, sig, &fd);
1900 if (target_klass == NULL) {
1901 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1903 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1904 return JNIHandles::make_local(field);
1907 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1909 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1910 JvmtiVMObjectAllocEventCollector oam;
1911 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1912 bounds_check(cp, index, CHECK_NULL);
1913 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1918 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1920 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1921 JvmtiVMObjectAllocEventCollector oam;
1922 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1923 bounds_check(cp, index, CHECK_NULL);
1924 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1929 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1931 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1932 JvmtiVMObjectAllocEventCollector oam;
1933 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1934 bounds_check(cp, index, CHECK_NULL);
1935 constantTag tag = cp->tag_at(index);
1936 if (!tag.is_field_or_method()) {
1937 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1939 int klass_ref = cp->uncached_klass_ref_index_at(index);
1940 Symbol* klass_name = cp->klass_name_at(klass_ref);
1941 Symbol* member_name = cp->uncached_name_ref_at(index);
1942 Symbol* member_sig = cp->uncached_signature_ref_at(index);
1943 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
1944 objArrayHandle dest(THREAD, dest_o);
1945 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1946 dest->obj_at_put(0, str());
1947 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1948 dest->obj_at_put(1, str());
1949 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1950 dest->obj_at_put(2, str());
1951 return (jobjectArray) JNIHandles::make_local(dest());
1955 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1957 JVMWrapper("JVM_ConstantPoolGetIntAt");
1958 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1959 bounds_check(cp, index, CHECK_0);
1960 constantTag tag = cp->tag_at(index);
1961 if (!tag.is_int()) {
1962 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1964 return cp->int_at(index);
1968 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1970 JVMWrapper("JVM_ConstantPoolGetLongAt");
1971 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1972 bounds_check(cp, index, CHECK_(0L));
1973 constantTag tag = cp->tag_at(index);
1974 if (!tag.is_long()) {
1975 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1977 return cp->long_at(index);
1981 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1983 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1984 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1985 bounds_check(cp, index, CHECK_(0.0f));
1986 constantTag tag = cp->tag_at(index);
1987 if (!tag.is_float()) {
1988 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1990 return cp->float_at(index);
1994 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1996 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1997 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1998 bounds_check(cp, index, CHECK_(0.0));
1999 constantTag tag = cp->tag_at(index);
2000 if (!tag.is_double()) {
2001 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2003 return cp->double_at(index);
2007 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2009 JVMWrapper("JVM_ConstantPoolGetStringAt");
2010 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2011 bounds_check(cp, index, CHECK_NULL);
2012 constantTag tag = cp->tag_at(index);
2013 if (!tag.is_string() && !tag.is_unresolved_string()) {
2014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2016 oop str = cp->string_at(index, CHECK_NULL);
2017 return (jstring) JNIHandles::make_local(str);
2021 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2023 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2024 JvmtiVMObjectAllocEventCollector oam;
2025 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2026 bounds_check(cp, index, CHECK_NULL);
2027 constantTag tag = cp->tag_at(index);
2028 if (!tag.is_symbol()) {
2029 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2031 Symbol* sym = cp->symbol_at(index);
2032 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2033 return (jstring) JNIHandles::make_local(str());
2038 // Assertion support. //////////////////////////////////////////////////////////
2040 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2041 JVMWrapper("JVM_DesiredAssertionStatus");
2042 assert(cls != NULL, "bad class");
2044 oop r = JNIHandles::resolve(cls);
2045 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2046 if (java_lang_Class::is_primitive(r)) return false;
2048 klassOop k = java_lang_Class::as_klassOop(r);
2049 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2050 if (! Klass::cast(k)->oop_is_instance()) return false;
2052 ResourceMark rm(THREAD);
2053 const char* name = Klass::cast(k)->name()->as_C_string();
2054 bool system_class = Klass::cast(k)->class_loader() == NULL;
2055 return JavaAssertions::enabled(name, system_class);
2060 // Return a new AssertionStatusDirectives object with the fields filled in with
2061 // command-line assertion arguments (i.e., -ea, -da).
2062 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2063 JVMWrapper("JVM_AssertionStatusDirectives");
2064 JvmtiVMObjectAllocEventCollector oam;
2065 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2066 return JNIHandles::make_local(env, asd);
2069 // Verification ////////////////////////////////////////////////////////////////////////////////
2071 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2073 // RedefineClasses support: bug 6214132 caused verification to fail.
2074 // All functions from this section should call the jvmtiThreadSate function:
2075 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2076 // The function returns a klassOop of the _scratch_class if the verifier
2077 // was invoked in the middle of the class redefinition.
2078 // Otherwise it returns its argument value which is the _the_class klassOop.
2079 // Please, refer to the description in the jvmtiThreadSate.hpp.
2081 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2082 JVMWrapper("JVM_GetClassNameUTF");
2083 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2084 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2085 return Klass::cast(k)->name()->as_utf8();
2089 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2090 JVMWrapper("JVM_GetClassCPTypes");
2091 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2092 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2093 // types will have length zero if this is not an instanceKlass
2094 // (length is determined by call to JVM_GetClassCPEntriesCount)
2095 if (Klass::cast(k)->oop_is_instance()) {
2096 constantPoolOop cp = instanceKlass::cast(k)->constants();
2097 for (int index = cp->length() - 1; index >= 0; index--) {
2098 constantTag tag = cp->tag_at(index);
2099 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2100 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2106 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2107 JVMWrapper("JVM_GetClassCPEntriesCount");
2108 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2109 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2110 if (!Klass::cast(k)->oop_is_instance())
2112 return instanceKlass::cast(k)->constants()->length();
2116 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2117 JVMWrapper("JVM_GetClassFieldsCount");
2118 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2119 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2120 if (!Klass::cast(k)->oop_is_instance())
2122 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset;
2126 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2127 JVMWrapper("JVM_GetClassMethodsCount");
2128 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2129 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2130 if (!Klass::cast(k)->oop_is_instance())
2132 return instanceKlass::cast(k)->methods()->length();
2136 // The following methods, used for the verifier, are never called with
2137 // array klasses, so a direct cast to instanceKlass is safe.
2138 // Typically, these methods are called in a loop with bounds determined
2139 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2141 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2142 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2143 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2144 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2145 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2146 int length = methodOop(method)->checked_exceptions_length();
2148 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2149 for (int i = 0; i < length; i++) {
2150 exceptions[i] = table[i].class_cp_index;
2156 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2157 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2158 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2159 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2160 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2161 return methodOop(method)->checked_exceptions_length();
2165 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2166 JVMWrapper("JVM_GetMethodIxByteCode");
2167 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2168 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2169 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2170 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2174 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2175 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2176 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2177 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2178 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2179 return methodOop(method)->code_size();
2183 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2184 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2185 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2186 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2187 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2188 typeArrayOop extable = methodOop(method)->exception_table();
2189 entry->start_pc = extable->int_at(entry_index * 4);
2190 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2191 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2192 entry->catchType = extable->int_at(entry_index * 4 + 3);
2196 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2197 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2198 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2199 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2200 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2201 return methodOop(method)->exception_table()->length() / 4;
2205 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2206 JVMWrapper("JVM_GetMethodIxModifiers");
2207 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2208 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2209 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2210 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2214 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2215 JVMWrapper("JVM_GetFieldIxModifiers");
2216 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2217 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2218 typeArrayOop fields = instanceKlass::cast(k)->fields();
2219 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2223 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2224 JVMWrapper("JVM_GetMethodIxLocalsCount");
2225 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2226 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2227 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2228 return methodOop(method)->max_locals();
2232 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2233 JVMWrapper("JVM_GetMethodIxArgsSize");
2234 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2235 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2236 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2237 return methodOop(method)->size_of_parameters();
2241 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2242 JVMWrapper("JVM_GetMethodIxMaxStack");
2243 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2244 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2245 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2246 return methodOop(method)->max_stack();
2250 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2251 JVMWrapper("JVM_IsConstructorIx");
2252 ResourceMark rm(THREAD);
2253 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2254 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2255 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2256 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2260 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2261 JVMWrapper("JVM_GetMethodIxIxUTF");
2262 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2264 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2265 return methodOop(method)->name()->as_utf8();
2269 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2270 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2271 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2272 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2273 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2274 return methodOop(method)->signature()->as_utf8();
2278 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2279 * read entries in the constant pool. Since the old verifier always
2280 * works on a copy of the code, it will not see any rewriting that
2281 * may possibly occur in the middle of verification. So it is important
2282 * that nothing it calls tries to use the cpCache instead of the raw
2283 * constant pool, so we must use cp->uncached_x methods when appropriate.
2285 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2286 JVMWrapper("JVM_GetCPFieldNameUTF");
2287 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2288 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2289 constantPoolOop cp = instanceKlass::cast(k)->constants();
2290 switch (cp->tag_at(cp_index).value()) {
2291 case JVM_CONSTANT_Fieldref:
2292 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2294 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2296 ShouldNotReachHere();
2301 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2302 JVMWrapper("JVM_GetCPMethodNameUTF");
2303 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2305 constantPoolOop cp = instanceKlass::cast(k)->constants();
2306 switch (cp->tag_at(cp_index).value()) {
2307 case JVM_CONSTANT_InterfaceMethodref:
2308 case JVM_CONSTANT_Methodref:
2309 case JVM_CONSTANT_NameAndType: // for invokedynamic
2310 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2312 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2314 ShouldNotReachHere();
2319 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2320 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2321 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2323 constantPoolOop cp = instanceKlass::cast(k)->constants();
2324 switch (cp->tag_at(cp_index).value()) {
2325 case JVM_CONSTANT_InterfaceMethodref:
2326 case JVM_CONSTANT_Methodref:
2327 case JVM_CONSTANT_NameAndType: // for invokedynamic
2328 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2330 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2332 ShouldNotReachHere();
2337 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2338 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2339 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2341 constantPoolOop cp = instanceKlass::cast(k)->constants();
2342 switch (cp->tag_at(cp_index).value()) {
2343 case JVM_CONSTANT_Fieldref:
2344 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2346 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2348 ShouldNotReachHere();
2353 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2354 JVMWrapper("JVM_GetCPClassNameUTF");
2355 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2356 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2357 constantPoolOop cp = instanceKlass::cast(k)->constants();
2358 Symbol* classname = cp->klass_name_at(cp_index);
2359 return classname->as_utf8();
2363 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2364 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2365 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2367 constantPoolOop cp = instanceKlass::cast(k)->constants();
2368 switch (cp->tag_at(cp_index).value()) {
2369 case JVM_CONSTANT_Fieldref: {
2370 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2371 Symbol* classname = cp->klass_name_at(class_index);
2372 return classname->as_utf8();
2375 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2377 ShouldNotReachHere();
2382 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2383 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2384 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2386 constantPoolOop cp = instanceKlass::cast(k)->constants();
2387 switch (cp->tag_at(cp_index).value()) {
2388 case JVM_CONSTANT_Methodref:
2389 case JVM_CONSTANT_InterfaceMethodref: {
2390 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2391 Symbol* classname = cp->klass_name_at(class_index);
2392 return classname->as_utf8();
2395 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2397 ShouldNotReachHere();
2402 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2403 JVMWrapper("JVM_GetCPFieldModifiers");
2404 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2405 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2407 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2408 constantPoolOop cp = instanceKlass::cast(k)->constants();
2409 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2410 switch (cp->tag_at(cp_index).value()) {
2411 case JVM_CONSTANT_Fieldref: {
2412 Symbol* name = cp->uncached_name_ref_at(cp_index);
2413 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2414 typeArrayOop fields = instanceKlass::cast(k_called)->fields();
2415 int fields_count = fields->length();
2416 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) {
2417 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name &&
2418 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) {
2419 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2425 fatal("JVM_GetCPFieldModifiers: illegal constant");
2427 ShouldNotReachHere();
2432 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2433 JVMWrapper("JVM_GetCPMethodModifiers");
2434 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2435 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2437 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2438 constantPoolOop cp = instanceKlass::cast(k)->constants();
2439 switch (cp->tag_at(cp_index).value()) {
2440 case JVM_CONSTANT_Methodref:
2441 case JVM_CONSTANT_InterfaceMethodref: {
2442 Symbol* name = cp->uncached_name_ref_at(cp_index);
2443 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2444 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2445 int methods_count = methods->length();
2446 for (int i = 0; i < methods_count; i++) {
2447 methodOop method = methodOop(methods->obj_at(i));
2448 if (method->name() == name && method->signature() == signature) {
2449 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2455 fatal("JVM_GetCPMethodModifiers: illegal constant");
2457 ShouldNotReachHere();
2462 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2464 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2465 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2469 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2470 JVMWrapper("JVM_IsSameClassPackage");
2471 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2472 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2473 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2474 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2475 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2479 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2481 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2482 JVMWrapper2("JVM_Open (%s)", fname);
2485 int result = os::open(fname, flags, mode);
2499 JVM_LEAF(jint, JVM_Close(jint fd))
2500 JVMWrapper2("JVM_Close (0x%x)", fd);
2502 return os::close(fd);
2506 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2507 JVMWrapper2("JVM_Read (0x%x)", fd);
2510 return (jint)os::restartable_read(fd, buf, nbytes);
2514 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2515 JVMWrapper2("JVM_Write (0x%x)", fd);
2518 return (jint)os::write(fd, buf, nbytes);
2522 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2523 JVMWrapper2("JVM_Available (0x%x)", fd);
2525 return os::available(fd, pbytes);
2529 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2530 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2532 return os::lseek(fd, offset, whence);
2536 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2537 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2538 return os::ftruncate(fd, length);
2542 JVM_LEAF(jint, JVM_Sync(jint fd))
2543 JVMWrapper2("JVM_Sync (0x%x)", fd);
2545 return os::fsync(fd);
2549 // Printing support //////////////////////////////////////////////////
2552 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2553 // see bug 4399518, 4417214
2554 if ((intptr_t)count <= 0) return -1;
2555 return vsnprintf(str, count, fmt, args);
2559 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2562 va_start(args, fmt);
2563 len = jio_vsnprintf(str, count, fmt, args);
2569 int jio_fprintf(FILE* f, const char *fmt, ...) {
2572 va_start(args, fmt);
2573 len = jio_vfprintf(f, fmt, args);
2579 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2580 if (Arguments::vfprintf_hook() != NULL) {
2581 return Arguments::vfprintf_hook()(f, fmt, args);
2583 return vfprintf(f, fmt, args);
2588 JNIEXPORT int jio_printf(const char *fmt, ...) {
2591 va_start(args, fmt);
2592 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2598 // HotSpot specific jio method
2599 void jio_print(const char* s) {
2600 // Try to make this function as atomic as possible.
2601 if (Arguments::vfprintf_hook() != NULL) {
2602 jio_fprintf(defaultStream::output_stream(), "%s", s);
2604 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2605 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2611 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2613 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2614 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2615 // OSThread objects. The exception to this rule is when the target object is the thread
2616 // doing the operation, in which case we know that the thread won't exit until the
2617 // operation is done (all exits being voluntary). There are a few cases where it is
2618 // rather silly to do operations on yourself, like resuming yourself or asking whether
2619 // you are alive. While these can still happen, they are not subject to deadlocks if
2620 // the lock is held while the operation occurs (this is not the case for suspend, for
2621 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2622 // implementation is local to this file, we always lock Threads_lock for that one.
2624 static void thread_entry(JavaThread* thread, TRAPS) {
2625 HandleMark hm(THREAD);
2626 Handle obj(THREAD, thread->threadObj());
2627 JavaValue result(T_VOID);
2628 JavaCalls::call_virtual(&result,
2630 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2631 vmSymbols::run_method_name(),
2632 vmSymbols::void_method_signature(),
2637 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2638 JVMWrapper("JVM_StartThread");
2639 JavaThread *native_thread = NULL;
2641 // We cannot hold the Threads_lock when we throw an exception,
2642 // due to rank ordering issues. Example: we might need to grab the
2643 // Heap_lock while we construct the exception.
2644 bool throw_illegal_thread_state = false;
2646 // We must release the Threads_lock before we can post a jvmti event
2647 // in Thread::start.
2649 // Ensure that the C++ Thread and OSThread structures aren't freed before
2651 MutexLocker mu(Threads_lock);
2653 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2654 // re-starting an already started thread, so we should usually find
2655 // that the JavaThread is null. However for a JNI attached thread
2656 // there is a small window between the Thread object being created
2657 // (with its JavaThread set) and the update to its threadStatus, so we
2658 // have to check for this
2659 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2660 throw_illegal_thread_state = true;
2662 // We could also check the stillborn flag to see if this thread was already stopped, but
2663 // for historical reasons we let the thread detect that itself when it starts running
2666 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2667 // Allocate the C++ Thread structure and create the native thread. The
2668 // stack size retrieved from java is signed, but the constructor takes
2669 // size_t (an unsigned type), so avoid passing negative values which would
2670 // result in really large stacks.
2671 size_t sz = size > 0 ? (size_t) size : 0;
2672 native_thread = new JavaThread(&thread_entry, sz);
2674 // At this point it may be possible that no osthread was created for the
2675 // JavaThread due to lack of memory. Check for this situation and throw
2676 // an exception if necessary. Eventually we may want to change this so
2677 // that we only grab the lock if the thread was created successfully -
2678 // then we can also do this check and throw the exception in the
2679 // JavaThread constructor.
2680 if (native_thread->osthread() != NULL) {
2681 // Note: the current thread is not being used within "prepare".
2682 native_thread->prepare(jthread);
2687 if (throw_illegal_thread_state) {
2688 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2691 assert(native_thread != NULL, "Starting null thread?");
2693 if (native_thread->osthread() == NULL) {
2694 // No one should hold a reference to the 'native_thread'.
2695 delete native_thread;
2696 if (JvmtiExport::should_post_resource_exhausted()) {
2697 JvmtiExport::post_resource_exhausted(
2698 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2699 "unable to create new native thread");
2701 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2702 "unable to create new native thread");
2705 Thread::start(native_thread);
2709 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2710 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2711 // but is thought to be reliable and simple. In the case, where the receiver is the
2712 // same thread as the sender, no safepoint is needed.
2713 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2714 JVMWrapper("JVM_StopThread");
2716 oop java_throwable = JNIHandles::resolve(throwable);
2717 if (java_throwable == NULL) {
2718 THROW(vmSymbols::java_lang_NullPointerException());
2720 oop java_thread = JNIHandles::resolve_non_null(jthread);
2721 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2722 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2723 // First check if thread is alive
2724 if (receiver != NULL) {
2725 // Check if exception is getting thrown at self (use oop equality, since the
2726 // target object might exit)
2727 if (java_thread == thread->threadObj()) {
2728 THROW_OOP(java_throwable);
2730 // Enques a VM_Operation to stop all threads and then deliver the exception...
2731 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2736 // - target thread has not been started before being stopped, or
2737 // - target thread already terminated
2738 // We could read the threadStatus to determine which case it is
2739 // but that is overkill as it doesn't matter. We must set the
2740 // stillborn flag for the first case, and if the thread has already
2741 // exited setting this flag has no affect
2742 java_lang_Thread::set_stillborn(java_thread);
2747 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2748 JVMWrapper("JVM_IsThreadAlive");
2750 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2751 return java_lang_Thread::is_alive(thread_oop);
2755 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2756 JVMWrapper("JVM_SuspendThread");
2757 oop java_thread = JNIHandles::resolve_non_null(jthread);
2758 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2760 if (receiver != NULL) {
2761 // thread has run and has not exited (still on threads list)
2764 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2765 if (receiver->is_external_suspend()) {
2766 // Don't allow nested external suspend requests. We can't return
2767 // an error from this interface so just ignore the problem.
2770 if (receiver->is_exiting()) { // thread is in the process of exiting
2773 receiver->set_external_suspend();
2776 // java_suspend() will catch threads in the process of exiting
2777 // and will ignore them.
2778 receiver->java_suspend();
2780 // It would be nice to have the following assertion in all the
2781 // time, but it is possible for a racing resume request to have
2782 // resumed this thread right after we suspended it. Temporarily
2783 // enable this assertion if you are chasing a different kind of
2786 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2787 // receiver->is_being_ext_suspended(), "thread is not suspended");
2792 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2793 JVMWrapper("JVM_ResumeThread");
2794 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2795 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2796 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2797 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2799 MutexLocker ml(Threads_lock);
2800 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2802 // the thread has run and is not in the process of exiting
2808 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2809 JVMWrapper("JVM_SetThreadPriority");
2810 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2811 MutexLocker ml(Threads_lock);
2812 oop java_thread = JNIHandles::resolve_non_null(jthread);
2813 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2814 JavaThread* thr = java_lang_Thread::thread(java_thread);
2815 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2816 Thread::set_priority(thr, (ThreadPriority)prio);
2821 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2822 JVMWrapper("JVM_Yield");
2823 if (os::dont_yield()) return;
2824 HS_DTRACE_PROBE0(hotspot, thread__yield);
2825 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2826 // Critical for similar threading behaviour
2827 if (ConvertYieldToSleep) {
2828 os::sleep(thread, MinSleepInterval, false);
2835 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2836 JVMWrapper("JVM_Sleep");
2839 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2842 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2843 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2846 // Save current thread state and restore it at the end of this block.
2847 // And set new thread state to SLEEPING.
2848 JavaThreadSleepState jtss(thread);
2850 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2853 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2854 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2855 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2857 if (ConvertSleepToYield) {
2860 ThreadState old_state = thread->osthread()->get_state();
2861 thread->osthread()->set_state(SLEEPING);
2862 os::sleep(thread, MinSleepInterval, false);
2863 thread->osthread()->set_state(old_state);
2866 ThreadState old_state = thread->osthread()->get_state();
2867 thread->osthread()->set_state(SLEEPING);
2868 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2869 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2870 // us while we were sleeping. We do not overwrite those.
2871 if (!HAS_PENDING_EXCEPTION) {
2872 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2873 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2874 // to properly restore the thread state. That's likely wrong.
2875 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2878 thread->osthread()->set_state(old_state);
2880 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2883 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2884 JVMWrapper("JVM_CurrentThread");
2885 oop jthread = thread->threadObj();
2886 assert (thread != NULL, "no current thread!");
2887 return JNIHandles::make_local(env, jthread);
2891 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2892 JVMWrapper("JVM_CountStackFrames");
2894 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2895 oop java_thread = JNIHandles::resolve_non_null(jthread);
2896 bool throw_illegal_thread_state = false;
2900 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2901 // We need to re-resolve the java_thread, since a GC might have happened during the
2902 // acquire of the lock
2903 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2907 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2908 // Check whether this java thread has been suspended already. If not, throws
2909 // IllegalThreadStateException. We defer to throw that exception until
2910 // Threads_lock is released since loading exception class has to leave VM.
2911 // The correct way to test a thread is actually suspended is
2912 // wait_for_ext_suspend_completion(), but we can't call that while holding
2913 // the Threads_lock. The above tests are sufficient for our purposes
2914 // provided the walkability of the stack is stable - which it isn't
2915 // 100% but close enough for most practical purposes.
2916 throw_illegal_thread_state = true;
2918 // Count all java activation, i.e., number of vframes
2919 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2920 // Native frames are not counted
2921 if (!vfst.method()->is_native()) count++;
2926 if (throw_illegal_thread_state) {
2927 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2928 "this thread is not suspended");
2933 // Consider: A better way to implement JVM_Interrupt() is to acquire
2934 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2935 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2936 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2937 // outside the critical section. Threads_lock is hot so we want to minimize
2938 // the hold-time. A cleaner interface would be to decompose interrupt into
2939 // two steps. The 1st phase, performed under Threads_lock, would return
2940 // a closure that'd be invoked after Threads_lock was dropped.
2941 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2942 // admit spurious wakeups.
2944 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2945 JVMWrapper("JVM_Interrupt");
2947 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2948 oop java_thread = JNIHandles::resolve_non_null(jthread);
2949 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2950 // We need to re-resolve the java_thread, since a GC might have happened during the
2951 // acquire of the lock
2952 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2954 Thread::interrupt(thr);
2959 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2960 JVMWrapper("JVM_IsInterrupted");
2962 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2963 oop java_thread = JNIHandles::resolve_non_null(jthread);
2964 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2965 // We need to re-resolve the java_thread, since a GC might have happened during the
2966 // acquire of the lock
2967 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2971 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2976 // Return true iff the current thread has locked the object passed in
2978 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2979 JVMWrapper("JVM_HoldsLock");
2980 assert(THREAD->is_Java_thread(), "sanity check");
2982 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2984 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2985 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2989 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2990 JVMWrapper("JVM_DumpAllStacks");
2992 VMThread::execute(&op);
2993 if (JvmtiExport::should_post_data_dump()) {
2994 JvmtiExport::post_data_dump();
2999 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3001 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3002 assert(jthread->is_Java_thread(), "must be a Java thread");
3003 if (jthread->privileged_stack_top() == NULL) return false;
3004 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3005 oop loader = jthread->privileged_stack_top()->class_loader();
3006 if (loader == NULL) return true;
3007 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3008 if (trusted) return true;
3013 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3014 JVMWrapper("JVM_CurrentLoadedClass");
3015 ResourceMark rm(THREAD);
3017 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3018 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3019 bool trusted = is_trusted_frame(thread, &vfst);
3020 if (trusted) return NULL;
3022 methodOop m = vfst.method();
3023 if (!m->is_native()) {
3024 klassOop holder = m->method_holder();
3025 oop loader = instanceKlass::cast(holder)->class_loader();
3026 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3027 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3035 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3036 JVMWrapper("JVM_CurrentClassLoader");
3037 ResourceMark rm(THREAD);
3039 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3041 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3042 bool trusted = is_trusted_frame(thread, &vfst);
3043 if (trusted) return NULL;
3045 methodOop m = vfst.method();
3046 if (!m->is_native()) {
3047 klassOop holder = m->method_holder();
3048 assert(holder->is_klass(), "just checking");
3049 oop loader = instanceKlass::cast(holder)->class_loader();
3050 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3051 return JNIHandles::make_local(env, loader);
3059 // Utility object for collecting method holders walking down the stack
3060 class KlassLink: public ResourceObj {
3065 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3069 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3070 JVMWrapper("JVM_GetClassContext");
3071 ResourceMark rm(THREAD);
3072 JvmtiVMObjectAllocEventCollector oam;
3073 // Collect linked list of (handles to) method holders
3074 KlassLink* first = NULL;
3075 KlassLink* last = NULL;
3078 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3079 // Native frames are not returned
3080 if (!vfst.method()->is_native()) {
3081 klassOop holder = vfst.method()->method_holder();
3082 assert(holder->is_klass(), "just checking");
3084 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3085 if (first == NULL) {
3094 // Create result array of type [Ljava/lang/Class;
3095 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3096 // Fill in mirrors corresponding to method holders
3098 while (first != NULL) {
3099 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3100 first = first->next;
3102 assert(index == depth, "just checking");
3104 return (jobjectArray) JNIHandles::make_local(env, result);
3108 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3109 JVMWrapper("JVM_ClassDepth");
3110 ResourceMark rm(THREAD);
3111 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3112 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3114 const char* str = java_lang_String::as_utf8_string(class_name_str());
3115 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3116 if (class_name_sym == NULL) {
3122 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3123 if (!vfst.method()->is_native()) {
3124 klassOop holder = vfst.method()->method_holder();
3125 assert(holder->is_klass(), "just checking");
3126 if (instanceKlass::cast(holder)->name() == class_name_sym) {
3136 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3137 JVMWrapper("JVM_ClassLoaderDepth");
3138 ResourceMark rm(THREAD);
3140 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3141 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3142 bool trusted = is_trusted_frame(thread, &vfst);
3143 if (trusted) return -1;
3145 methodOop m = vfst.method();
3146 if (!m->is_native()) {
3147 klassOop holder = m->method_holder();
3148 assert(holder->is_klass(), "just checking");
3149 oop loader = instanceKlass::cast(holder)->class_loader();
3150 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3160 // java.lang.Package ////////////////////////////////////////////////////////////////
3163 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3164 JVMWrapper("JVM_GetSystemPackage");
3165 ResourceMark rm(THREAD);
3166 JvmtiVMObjectAllocEventCollector oam;
3167 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3168 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3169 return (jstring) JNIHandles::make_local(result);
3173 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3174 JVMWrapper("JVM_GetSystemPackages");
3175 JvmtiVMObjectAllocEventCollector oam;
3176 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3177 return (jobjectArray) JNIHandles::make_local(result);
3181 // ObjectInputStream ///////////////////////////////////////////////////////////////
3183 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3184 if (current_class == NULL) {
3187 if ((current_class == field_class) || access.is_public()) {
3191 if (access.is_protected()) {
3192 // See if current_class is a subclass of field_class
3193 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3198 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3202 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3203 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3204 JVMWrapper("JVM_AllocateNewObject");
3205 JvmtiVMObjectAllocEventCollector oam;
3206 // Receiver is not used
3207 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3208 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3210 // Cannot instantiate primitive types
3211 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3212 ResourceMark rm(THREAD);
3213 THROW_0(vmSymbols::java_lang_InvalidClassException());
3216 // Arrays not allowed here, must use JVM_AllocateNewArray
3217 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3218 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3219 ResourceMark rm(THREAD);
3220 THROW_0(vmSymbols::java_lang_InvalidClassException());
3223 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3224 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3226 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3228 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3229 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3231 // Make sure klass is initialized, since we are about to instantiate one of them.
3232 curr_klass->initialize(CHECK_NULL);
3234 methodHandle m (THREAD,
3235 init_klass->find_method(vmSymbols::object_initializer_name(),
3236 vmSymbols::void_method_signature()));
3238 ResourceMark rm(THREAD);
3239 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3240 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3241 vmSymbols::object_initializer_name(),
3242 vmSymbols::void_method_signature()));
3245 if (curr_klass == init_klass && !m->is_public()) {
3246 // Calling the constructor for class 'curr_klass'.
3247 // Only allow calls to a public no-arg constructor.
3248 // This path corresponds to creating an Externalizable object.
3249 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3252 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3253 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3254 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3257 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3258 // Call constructor m. This might call a constructor higher up in the hierachy
3259 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3261 return JNIHandles::make_local(obj());
3265 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3266 JVMWrapper("JVM_AllocateNewArray");
3267 JvmtiVMObjectAllocEventCollector oam;
3268 oop mirror = JNIHandles::resolve_non_null(currClass);
3270 if (java_lang_Class::is_primitive(mirror)) {
3271 THROW_0(vmSymbols::java_lang_InvalidClassException());
3273 klassOop k = java_lang_Class::as_klassOop(mirror);
3276 if (k->klass_part()->oop_is_typeArray()) {
3278 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3279 } else if (k->klass_part()->oop_is_objArray()) {
3281 objArrayKlassHandle oak(THREAD, k);
3282 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3283 result = oak->allocate(length, CHECK_NULL);
3285 THROW_0(vmSymbols::java_lang_InvalidClassException());
3287 return JNIHandles::make_local(env, result);
3291 // Return the first non-null class loader up the execution stack, or null
3292 // if only code from the null class loader is on the stack.
3294 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3295 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3297 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3298 klassOop holder = vfst.method()->method_holder();
3299 oop loader = instanceKlass::cast(holder)->class_loader();
3300 if (loader != NULL) {
3301 return JNIHandles::make_local(env, loader);
3308 // Load a class relative to the most recent class on the stack with a non-null
3310 // This function has been deprecated and should not be considered part of the
3311 // specified JVM interface.
3313 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3314 jclass currClass, jstring currClassName))
3315 JVMWrapper("JVM_LoadClass0");
3316 // Receiver is not used
3317 ResourceMark rm(THREAD);
3319 // Class name argument is not guaranteed to be in internal format
3320 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3321 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3323 const char* str = java_lang_String::as_utf8_string(string());
3325 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3326 // It's impossible to create this class; the name cannot fit
3327 // into the constant pool.
3328 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3331 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3332 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3333 // Find the most recent class on the stack with a non-null classloader
3335 oop protection_domain = NULL;
3336 if (curr_klass.is_null()) {
3337 for (vframeStream vfst(thread);
3338 !vfst.at_end() && loader == NULL;
3340 if (!vfst.method()->is_native()) {
3341 klassOop holder = vfst.method()->method_holder();
3342 loader = instanceKlass::cast(holder)->class_loader();
3343 protection_domain = instanceKlass::cast(holder)->protection_domain();
3347 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3348 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3349 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3351 Handle h_loader(THREAD, loader);
3352 Handle h_prot (THREAD, protection_domain);
3353 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3355 if (TraceClassResolution && result != NULL) {
3356 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3362 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3365 // resolve array handle and check arguments
3366 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3368 THROW_0(vmSymbols::java_lang_NullPointerException());
3370 oop a = JNIHandles::resolve_non_null(arr);
3371 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3372 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3378 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3379 JVMWrapper("JVM_GetArrayLength");
3380 arrayOop a = check_array(env, arr, false, CHECK_0);
3385 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3386 JVMWrapper("JVM_Array_Get");
3387 JvmtiVMObjectAllocEventCollector oam;
3388 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3390 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3391 oop box = Reflection::box(&value, type, CHECK_NULL);
3392 return JNIHandles::make_local(env, box);
3396 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3397 JVMWrapper("JVM_GetPrimitiveArrayElement");
3399 value.i = 0; // to initialize value before getting used in CHECK
3400 arrayOop a = check_array(env, arr, true, CHECK_(value));
3401 assert(a->is_typeArray(), "just checking");
3402 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3403 BasicType wide_type = (BasicType) wCode;
3404 if (type != wide_type) {
3405 Reflection::widen(&value, type, wide_type, CHECK_(value));
3411 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3412 JVMWrapper("JVM_SetArrayElement");
3413 arrayOop a = check_array(env, arr, false, CHECK);
3414 oop box = JNIHandles::resolve(val);
3416 value.i = 0; // to initialize value before getting used in CHECK
3417 BasicType value_type;
3418 if (a->is_objArray()) {
3419 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3420 value_type = Reflection::unbox_for_regular_object(box, &value);
3422 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3424 Reflection::array_set(&value, a, index, value_type, CHECK);
3428 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3429 JVMWrapper("JVM_SetPrimitiveArrayElement");
3430 arrayOop a = check_array(env, arr, true, CHECK);
3431 assert(a->is_typeArray(), "just checking");
3432 BasicType value_type = (BasicType) vCode;
3433 Reflection::array_set(&v, a, index, value_type, CHECK);
3437 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3438 JVMWrapper("JVM_NewArray");
3439 JvmtiVMObjectAllocEventCollector oam;
3440 oop element_mirror = JNIHandles::resolve(eltClass);
3441 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3442 return JNIHandles::make_local(env, result);
3446 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3447 JVMWrapper("JVM_NewMultiArray");
3448 JvmtiVMObjectAllocEventCollector oam;
3449 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3450 oop element_mirror = JNIHandles::resolve(eltClass);
3451 assert(dim_array->is_typeArray(), "just checking");
3452 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3453 return JNIHandles::make_local(env, result);
3457 // Networking library support ////////////////////////////////////////////////////////////////////
3459 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3460 JVMWrapper("JVM_InitializeSocketLibrary");
3465 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3466 JVMWrapper("JVM_Socket");
3467 return os::socket(domain, type, protocol);
3471 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3472 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3474 return os::socket_close(fd);
3478 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3479 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3481 return os::socket_shutdown(fd, howto);
3485 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3486 JVMWrapper2("JVM_Recv (0x%x)", fd);
3488 return os::recv(fd, buf, nBytes, flags);
3492 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3493 JVMWrapper2("JVM_Send (0x%x)", fd);
3495 return os::send(fd, buf, nBytes, flags);
3499 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3500 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3502 return os::timeout(fd, timeout);
3506 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3507 JVMWrapper2("JVM_Listen (0x%x)", fd);
3509 return os::listen(fd, count);
3513 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3514 JVMWrapper2("JVM_Connect (0x%x)", fd);
3516 return os::connect(fd, him, len);
3520 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3521 JVMWrapper2("JVM_Bind (0x%x)", fd);
3523 return os::bind(fd, him, len);
3527 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3528 JVMWrapper2("JVM_Accept (0x%x)", fd);
3530 return os::accept(fd, him, (int *)len);
3534 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3535 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3537 return os::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3541 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3542 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3544 return os::get_sock_name(fd, him, len);
3548 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3549 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3551 return os::sendto(fd, buf, len, flags, to, tolen);
3555 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3556 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3558 return os::socket_available(fd, pbytes);
3562 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3563 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3565 return os::get_sock_opt(fd, level, optname, optval, optlen);
3569 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3570 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3572 return os::set_sock_opt(fd, level, optname, optval, optlen);
3575 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3576 JVMWrapper("JVM_GetHostName");
3577 return os::get_host_name(name, namelen);
3580 // Library support ///////////////////////////////////////////////////////////////////////////
3582 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3584 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3588 ThreadToNativeFromVM ttnfvm(thread);
3589 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3591 if (load_result == NULL) {
3593 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3594 // Since 'ebuf' may contain a string encoded using
3595 // platform encoding scheme, we need to pass
3596 // Exceptions::unsafe_to_utf8 to the new_exception method
3597 // as the last argument. See bug 6367357.
3598 Handle h_exception =
3599 Exceptions::new_exception(thread,
3600 vmSymbols::java_lang_UnsatisfiedLinkError(),
3601 msg, Exceptions::unsafe_to_utf8);
3603 THROW_HANDLE_0(h_exception);
3609 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3610 JVMWrapper("JVM_UnloadLibrary");
3611 os::dll_unload(handle);
3615 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3616 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3617 return os::dll_lookup(handle, name);
3620 // Floating point support ////////////////////////////////////////////////////////////////////
3622 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3623 JVMWrapper("JVM_IsNaN");
3629 // JNI version ///////////////////////////////////////////////////////////////////////////////
3631 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3632 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3633 return Threads::is_supported_jni_version_including_1_1(version);
3637 // String support ///////////////////////////////////////////////////////////////////////////
3639 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3640 JVMWrapper("JVM_InternString");
3641 JvmtiVMObjectAllocEventCollector oam;
3642 if (str == NULL) return NULL;
3643 oop string = JNIHandles::resolve_non_null(str);
3644 oop result = StringTable::intern(string, CHECK_NULL);
3645 return (jstring) JNIHandles::make_local(env, result);
3649 // Raw monitor support //////////////////////////////////////////////////////////////////////
3651 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3652 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3653 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3654 // that only works with java threads.
3657 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3658 VM_Exit::block_if_vm_exited();
3659 JVMWrapper("JVM_RawMonitorCreate");
3660 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3664 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3665 VM_Exit::block_if_vm_exited();
3666 JVMWrapper("JVM_RawMonitorDestroy");
3667 delete ((Mutex*) mon);
3671 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3672 VM_Exit::block_if_vm_exited();
3673 JVMWrapper("JVM_RawMonitorEnter");
3674 ((Mutex*) mon)->jvm_raw_lock();
3679 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3680 VM_Exit::block_if_vm_exited();
3681 JVMWrapper("JVM_RawMonitorExit");
3682 ((Mutex*) mon)->jvm_raw_unlock();
3686 // Support for Serialization
3688 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3689 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3690 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3691 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3693 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3694 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3695 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3696 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3699 void initialize_converter_functions() {
3700 if (JDK_Version::is_gte_jdk14x_version()) {
3701 // These functions only exist for compatibility with 1.3.1 and earlier
3705 // called from universe_post_init()
3707 int_bits_to_float_fn == NULL &&
3708 long_bits_to_double_fn == NULL &&
3709 float_to_int_bits_fn == NULL &&
3710 double_to_long_bits_fn == NULL ,
3711 "initialization done twice"
3714 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3715 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3716 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3717 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3720 int_bits_to_float_fn != NULL &&
3721 long_bits_to_double_fn != NULL &&
3722 float_to_int_bits_fn != NULL &&
3723 double_to_long_bits_fn != NULL ,
3724 "initialization failed"
3730 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3731 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3732 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3734 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3735 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3736 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3737 oop o = JNIHandles::resolve(obj);
3739 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3740 THROW(vmSymbols::java_lang_NullPointerException());
3743 jsize nfids = fids->length();
3744 if (nfids == 0) return;
3746 if (tcodes->length() < nfids) {
3747 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3751 /* loop through fields, setting values */
3752 for (jsize i = 0; i < nfids; i++) {
3753 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3756 // NULL is a legal value for fid, but retrieving the field offset
3757 // trigger assertion in that case
3758 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3761 switch (tcodes->char_at(i)) {
3764 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3765 o->bool_field_put(field_offset, val);
3772 o->byte_field_put(field_offset, dbuf->byte_at(off));
3779 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3780 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3781 o->char_field_put(field_offset, val);
3788 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3789 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3790 o->short_field_put(field_offset, val);
3797 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3798 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3799 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3800 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3801 o->int_field_put(field_offset, ival);
3808 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3809 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3810 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3811 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3812 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3813 o->float_field_put(field_offset, fval);
3820 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3821 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3822 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3823 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3824 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3825 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3826 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3827 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3828 o->long_field_put(field_offset, lval);
3835 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3836 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3837 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3838 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3839 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3840 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3841 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3842 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3843 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3844 o->double_field_put(field_offset, dval);
3851 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3857 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3858 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3859 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3861 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3862 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3863 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3864 oop o = JNIHandles::resolve(obj);
3866 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3867 THROW(vmSymbols::java_lang_NullPointerException());
3870 jsize nfids = fids->length();
3871 if (nfids == 0) return;
3873 if (tcodes->length() < nfids) {
3874 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3877 /* loop through fields, fetching values */
3879 for (jsize i = 0; i < nfids; i++) {
3880 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3882 THROW(vmSymbols::java_lang_NullPointerException());
3884 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3886 switch (tcodes->char_at(i)) {
3889 jboolean val = o->bool_field(field_offset);
3890 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3895 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3900 jchar val = o->char_field(field_offset);
3901 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3902 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3908 jshort val = o->short_field(field_offset);
3909 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3910 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3916 jint val = o->int_field(field_offset);
3917 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3918 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3919 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3920 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3926 jfloat fval = o->float_field(field_offset);
3927 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3928 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3929 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3930 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3931 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3937 jlong val = o->long_field(field_offset);
3938 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3939 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3940 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3941 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3942 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3943 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3944 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3945 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3951 jdouble dval = o->double_field(field_offset);
3952 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3953 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3954 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3955 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3956 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3957 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3958 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3959 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3960 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3966 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3972 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3974 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3976 // The Java level wrapper will perform the necessary security check allowing
3977 // us to pass the NULL as the initiating class loader.
3978 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3980 KlassHandle klass_handle(THREAD, klass);
3981 // Check if we should initialize the class
3982 if (init && klass_handle->oop_is_instance()) {
3983 klass_handle->initialize(CHECK_NULL);
3985 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3989 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3994 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3995 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3996 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3999 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4000 JVMWrapper("JVM_AccessBoolVMFlag");
4001 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4004 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4005 JVMWrapper("JVM_AccessVMIntFlag");
4007 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4013 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4014 JVMWrapper("JVM_VMBreakPoint");
4015 oop the_obj = JNIHandles::resolve(obj);
4023 //---------------------------------------------------------------------------
4025 // Support for old native code-based reflection (pre-JDK 1.4)
4026 // Disabled by default in the product build.
4028 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION
4030 //---------------------------------------------------------------------------
4032 #ifdef SUPPORT_OLD_REFLECTION
4034 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which))
4035 JVMWrapper("JVM_GetClassFields");
4036 JvmtiVMObjectAllocEventCollector oam;
4037 oop mirror = JNIHandles::resolve_non_null(cls);
4038 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL);
4039 return (jobjectArray) JNIHandles::make_local(env, result);
4043 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which))
4044 JVMWrapper("JVM_GetClassMethods");
4045 JvmtiVMObjectAllocEventCollector oam;
4046 oop mirror = JNIHandles::resolve_non_null(cls);
4047 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL);
4049 return (jobjectArray) JNIHandles::make_local(env, result);
4053 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which))
4054 JVMWrapper("JVM_GetClassConstructors");
4055 JvmtiVMObjectAllocEventCollector oam;
4056 oop mirror = JNIHandles::resolve_non_null(cls);
4057 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL);
4059 return (jobjectArray) JNIHandles::make_local(env, result);
4063 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which))
4064 JVMWrapper("JVM_GetClassField");
4065 JvmtiVMObjectAllocEventCollector oam;
4066 if (name == NULL) return NULL;
4067 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4069 const char* cstr = java_lang_String::as_utf8_string(str());
4070 TempNewSymbol field_name = SymbolTable::probe(cstr, (int)strlen(cstr));
4071 if (field_name == NULL) {
4072 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
4075 oop mirror = JNIHandles::resolve_non_null(cls);
4076 oop result = Reflection::reflect_field(mirror, field_name, which, CHECK_NULL);
4077 if (result == NULL) {
4078 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
4080 return JNIHandles::make_local(env, result);
4084 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which))
4085 JVMWrapper("JVM_GetClassMethod");
4086 JvmtiVMObjectAllocEventCollector oam;
4088 THROW_0(vmSymbols::java_lang_NullPointerException());
4090 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4092 const char* cstr = java_lang_String::as_utf8_string(str());
4093 TempNewSymbol method_name = SymbolTable::probe(cstr, (int)strlen(cstr));
4094 if (method_name == NULL) {
4095 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4098 oop mirror = JNIHandles::resolve_non_null(cls);
4099 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4100 oop result = Reflection::reflect_method(mirror, method_name, tarray,
4102 if (result == NULL) {
4103 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4105 return JNIHandles::make_local(env, result);
4109 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which))
4110 JVMWrapper("JVM_GetClassConstructor");
4111 JvmtiVMObjectAllocEventCollector oam;
4112 oop mirror = JNIHandles::resolve_non_null(cls);
4113 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4114 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL);
4115 if (result == NULL) {
4116 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4118 return (jobject) JNIHandles::make_local(env, result);
4122 // Instantiation ///////////////////////////////////////////////////////////////////////////////
4124 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls))
4125 JVMWrapper("JVM_NewInstance");
4126 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls));
4128 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror());
4129 if (resolved_constructor == NULL) {
4130 klassOop k = java_lang_Class::as_klassOop(mirror());
4131 // The java.lang.Class object caches a resolved constructor if all the checks
4132 // below were done successfully and a constructor was found.
4134 // Do class based checks
4135 if (java_lang_Class::is_primitive(mirror())) {
4136 const char* msg = "";
4137 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean";
4138 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character";
4139 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float";
4140 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double";
4141 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte";
4142 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short";
4143 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer";
4144 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long";
4145 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg);
4148 // Check whether we are allowed to instantiate this class
4149 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here
4150 instanceKlassHandle klass(THREAD, k);
4151 // Make sure class is initialized (also so all methods are rewritten)
4152 klass->initialize(CHECK_NULL);
4154 // Lookup default constructor
4155 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature());
4156 if (resolved_constructor == NULL) {
4157 ResourceMark rm(THREAD);
4158 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name());
4161 // Cache result in java.lang.Class object. Does not have to be MT safe.
4162 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor);
4165 assert(resolved_constructor != NULL, "sanity check");
4166 methodHandle constructor = methodHandle(THREAD, resolved_constructor);
4168 // We have an initialized instanceKlass with a default constructor
4169 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
4170 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check");
4172 // Do security check
4173 klassOop caller_klass = NULL;
4174 if (UsePrivilegedStack) {
4175 caller_klass = thread->security_get_caller_class(2);
4177 if (!Reflection::verify_class_access(caller_klass, klass(), false) ||
4178 !Reflection::verify_field_access(caller_klass,
4181 constructor->access_flags(),
4184 ResourceMark rm(THREAD);
4185 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name());
4189 // Allocate object and call constructor
4190 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
4191 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL);
4193 jobject res = JNIHandles::make_local(env, receiver());
4194 if (JvmtiExport::should_post_vm_object_alloc()) {
4195 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver());
4201 // Field ////////////////////////////////////////////////////////////////////////////////////////////
4203 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj))
4204 JVMWrapper("JVM_GetField");
4205 JvmtiVMObjectAllocEventCollector oam;
4206 Handle field_mirror(thread, JNIHandles::resolve(field));
4207 Handle receiver (thread, JNIHandles::resolve(obj));
4209 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL);
4211 BasicType type = Reflection::field_get(&value, &fd, receiver);
4212 oop box = Reflection::box(&value, type, CHECK_NULL);
4213 return JNIHandles::make_local(env, box);
4217 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode))
4218 JVMWrapper("JVM_GetPrimitiveField");
4219 Handle field_mirror(thread, JNIHandles::resolve(field));
4220 Handle receiver (thread, JNIHandles::resolve(obj));
4224 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value));
4225 BasicType type = Reflection::field_get(&value, &fd, receiver);
4226 BasicType wide_type = (BasicType) wCode;
4227 if (type != wide_type) {
4228 Reflection::widen(&value, type, wide_type, CHECK_(value));
4231 JVM_END // should really be JVM_END, but that doesn't work for union types!
4234 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val))
4235 JVMWrapper("JVM_SetField");
4236 Handle field_mirror(thread, JNIHandles::resolve(field));
4237 Handle receiver (thread, JNIHandles::resolve(obj));
4238 oop box = JNIHandles::resolve(val);
4240 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4241 BasicType field_type = fd.field_type();
4243 BasicType value_type;
4244 if (field_type == T_OBJECT || field_type == T_ARRAY) {
4245 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
4246 value_type = Reflection::unbox_for_regular_object(box, &value);
4247 Reflection::field_set(&value, &fd, receiver, field_type, CHECK);
4249 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
4250 Reflection::field_set(&value, &fd, receiver, value_type, CHECK);
4255 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode))
4256 JVMWrapper("JVM_SetPrimitiveField");
4257 Handle field_mirror(thread, JNIHandles::resolve(field));
4258 Handle receiver (thread, JNIHandles::resolve(obj));
4260 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4261 BasicType value_type = (BasicType) vCode;
4262 Reflection::field_set(&v, &fd, receiver, value_type, CHECK);
4266 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4268 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4269 JVMWrapper("JVM_InvokeMethod");
4270 Handle method_handle;
4271 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4272 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4273 Handle receiver(THREAD, JNIHandles::resolve(obj));
4274 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4275 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4276 jobject res = JNIHandles::make_local(env, result);
4277 if (JvmtiExport::should_post_vm_object_alloc()) {
4278 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4279 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4280 if (java_lang_Class::is_primitive(ret_type)) {
4281 // Only for primitive type vm allocates memory for java object.
4282 // See box() method.
4283 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4288 THROW_0(vmSymbols::java_lang_StackOverflowError());
4293 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4294 JVMWrapper("JVM_NewInstanceFromConstructor");
4295 oop constructor_mirror = JNIHandles::resolve(c);
4296 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4297 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4298 jobject res = JNIHandles::make_local(env, result);
4299 if (JvmtiExport::should_post_vm_object_alloc()) {
4300 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4305 #endif /* SUPPORT_OLD_REFLECTION */
4307 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4309 JVM_LEAF(jboolean, JVM_SupportsCX8())
4310 JVMWrapper("JVM_SupportsCX8");
4311 return VM_Version::supports_cx8();
4315 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4316 JVMWrapper("JVM_CX8Field");
4318 oop o = JNIHandles::resolve(obj);
4319 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4320 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4322 assert(VM_Version::supports_cx8(), "cx8 not supported");
4323 res = Atomic::cmpxchg(newVal, addr, oldVal);
4325 return res == oldVal;
4328 // DTrace ///////////////////////////////////////////////////////////////////
4330 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4331 JVMWrapper("JVM_DTraceGetVersion");
4332 return (jint)JVM_TRACING_DTRACE_VERSION;
4335 JVM_ENTRY(jlong,JVM_DTraceActivate(
4336 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4337 JVM_DTraceProvider* providers))
4338 JVMWrapper("JVM_DTraceActivate");
4339 return DTraceJSDT::activate(
4340 version, module_name, providers_count, providers, CHECK_0);
4343 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4344 JVMWrapper("JVM_DTraceIsProbeEnabled");
4345 return DTraceJSDT::is_probe_enabled(method);
4348 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4349 JVMWrapper("JVM_DTraceDispose");
4350 DTraceJSDT::dispose(handle);
4353 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4354 JVMWrapper("JVM_DTraceIsSupported");
4355 return DTraceJSDT::is_supported();
4358 // Returns an array of all live Thread objects (VM internal JavaThreads,
4359 // jvmti agent threads, and JNI attaching threads are skipped)
4360 // See CR 6404306 regarding JNI attaching threads
4361 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4362 ResourceMark rm(THREAD);
4363 ThreadsListEnumerator tle(THREAD, false, false);
4364 JvmtiVMObjectAllocEventCollector oam;
4366 int num_threads = tle.num_threads();
4367 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4368 objArrayHandle threads_ah(THREAD, r);
4370 for (int i = 0; i < num_threads; i++) {
4371 Handle h = tle.get_threadObj(i);
4372 threads_ah->obj_at_put(i, h());
4375 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4379 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4380 // Return StackTraceElement[][], each element is the stack trace of a thread in
4381 // the corresponding entry in the given threads array
4382 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4383 JVMWrapper("JVM_DumpThreads");
4384 JvmtiVMObjectAllocEventCollector oam;
4386 // Check if threads is null
4387 if (threads == NULL) {
4388 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4391 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4392 objArrayHandle ah(THREAD, a);
4393 int num_threads = ah->length();
4394 // check if threads is non-empty array
4395 if (num_threads == 0) {
4396 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4399 // check if threads is not an array of objects of Thread class
4400 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4401 if (k != SystemDictionary::Thread_klass()) {
4402 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4405 ResourceMark rm(THREAD);
4407 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4408 for (int i = 0; i < num_threads; i++) {
4409 oop thread_obj = ah->obj_at(i);
4410 instanceHandle h(THREAD, (instanceOop) thread_obj);
4411 thread_handle_array->append(h);
4414 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4415 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4419 // JVM monitoring and management support
4420 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4421 return Management::get_jmm_interface(version);
4424 // com.sun.tools.attach.VirtualMachine agent properties support
4426 // Initialize the agent properties with the properties maintained in the VM
4427 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4428 JVMWrapper("JVM_InitAgentProperties");
4431 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4433 PUTPROP(props, "sun.java.command", Arguments::java_command());
4434 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4435 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4439 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4441 JVMWrapper("JVM_GetEnclosingMethodInfo");
4442 JvmtiVMObjectAllocEventCollector oam;
4444 if (ofClass == NULL) {
4447 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4448 // Special handling for primitive objects
4449 if (java_lang_Class::is_primitive(mirror())) {
4452 klassOop k = java_lang_Class::as_klassOop(mirror());
4453 if (!Klass::cast(k)->oop_is_instance()) {
4456 instanceKlassHandle ik_h(THREAD, k);
4457 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4458 if (encl_method_class_idx == 0) {
4461 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4462 objArrayHandle dest(THREAD, dest_o);
4463 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4464 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4465 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4466 if (encl_method_method_idx != 0) {
4467 Symbol* sym = ik_h->constants()->symbol_at(
4468 extract_low_short_from_int(
4469 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4470 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4471 dest->obj_at_put(1, str());
4472 sym = ik_h->constants()->symbol_at(
4473 extract_high_short_from_int(
4474 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4475 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4476 dest->obj_at_put(2, str());
4478 return (jobjectArray) JNIHandles::make_local(dest());
4482 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4483 jint javaThreadState))
4485 // If new thread states are added in future JDK and VM versions,
4486 // this should check if the JDK version is compatible with thread
4487 // states supported by the VM. Return NULL if not compatible.
4489 // This function must map the VM java_lang_Thread::ThreadStatus
4490 // to the Java thread state that the JDK supports.
4493 typeArrayHandle values_h;
4494 switch (javaThreadState) {
4495 case JAVA_THREAD_STATE_NEW : {
4496 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4497 values_h = typeArrayHandle(THREAD, r);
4498 values_h->int_at_put(0, java_lang_Thread::NEW);
4501 case JAVA_THREAD_STATE_RUNNABLE : {
4502 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4503 values_h = typeArrayHandle(THREAD, r);
4504 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4507 case JAVA_THREAD_STATE_BLOCKED : {
4508 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4509 values_h = typeArrayHandle(THREAD, r);
4510 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4513 case JAVA_THREAD_STATE_WAITING : {
4514 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4515 values_h = typeArrayHandle(THREAD, r);
4516 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4517 values_h->int_at_put(1, java_lang_Thread::PARKED);
4520 case JAVA_THREAD_STATE_TIMED_WAITING : {
4521 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4522 values_h = typeArrayHandle(THREAD, r);
4523 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4524 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4525 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4528 case JAVA_THREAD_STATE_TERMINATED : {
4529 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4530 values_h = typeArrayHandle(THREAD, r);
4531 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4535 // Unknown state - probably incompatible JDK version
4539 return (jintArray) JNIHandles::make_local(env, values_h());
4544 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4545 jint javaThreadState,
4548 // If new thread states are added in future JDK and VM versions,
4549 // this should check if the JDK version is compatible with thread
4550 // states supported by the VM. Return NULL if not compatible.
4552 // This function must map the VM java_lang_Thread::ThreadStatus
4553 // to the Java thread state that the JDK supports.
4558 // Check if threads is null
4559 if (values == NULL) {
4560 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4563 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4564 typeArrayHandle values_h(THREAD, v);
4566 objArrayHandle names_h;
4567 switch (javaThreadState) {
4568 case JAVA_THREAD_STATE_NEW : {
4569 assert(values_h->length() == 1 &&
4570 values_h->int_at(0) == java_lang_Thread::NEW,
4571 "Invalid threadStatus value");
4573 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4574 1, /* only 1 substate */
4576 names_h = objArrayHandle(THREAD, r);
4577 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4578 names_h->obj_at_put(0, name());
4581 case JAVA_THREAD_STATE_RUNNABLE : {
4582 assert(values_h->length() == 1 &&
4583 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4584 "Invalid threadStatus value");
4586 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4587 1, /* only 1 substate */
4589 names_h = objArrayHandle(THREAD, r);
4590 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4591 names_h->obj_at_put(0, name());
4594 case JAVA_THREAD_STATE_BLOCKED : {
4595 assert(values_h->length() == 1 &&
4596 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4597 "Invalid threadStatus value");
4599 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4600 1, /* only 1 substate */
4602 names_h = objArrayHandle(THREAD, r);
4603 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4604 names_h->obj_at_put(0, name());
4607 case JAVA_THREAD_STATE_WAITING : {
4608 assert(values_h->length() == 2 &&
4609 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4610 values_h->int_at(1) == java_lang_Thread::PARKED,
4611 "Invalid threadStatus value");
4612 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4613 2, /* number of substates */
4615 names_h = objArrayHandle(THREAD, r);
4616 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4618 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4620 names_h->obj_at_put(0, name0());
4621 names_h->obj_at_put(1, name1());
4624 case JAVA_THREAD_STATE_TIMED_WAITING : {
4625 assert(values_h->length() == 3 &&
4626 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4627 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4628 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4629 "Invalid threadStatus value");
4630 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4631 3, /* number of substates */
4633 names_h = objArrayHandle(THREAD, r);
4634 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4636 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4638 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4640 names_h->obj_at_put(0, name0());
4641 names_h->obj_at_put(1, name1());
4642 names_h->obj_at_put(2, name2());
4645 case JAVA_THREAD_STATE_TERMINATED : {
4646 assert(values_h->length() == 1 &&
4647 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4648 "Invalid threadStatus value");
4649 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4650 1, /* only 1 substate */
4652 names_h = objArrayHandle(THREAD, r);
4653 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4654 names_h->obj_at_put(0, name());
4658 // Unknown state - probably incompatible JDK version
4661 return (jobjectArray) JNIHandles::make_local(env, names_h());
4665 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4667 memset(info, 0, sizeof(info_size));
4669 info->jvm_version = Abstract_VM_Version::jvm_version();
4670 info->update_version = 0; /* 0 in HotSpot Express VM */
4671 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4673 // when we add a new capability in the jvm_version_info struct, we should also
4674 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4675 // counter defined in runtimeService.cpp.
4676 info->is_attachable = AttachListener::is_attach_supported();
4678 info->is_kernel_jvm = 1; // true;
4680 info->is_kernel_jvm = 0; // false;