Mercurial > hg > truffle
view src/share/vm/prims/whitebox.cpp @ 16928:3461ae3a4b06
[SPARC] Fixing branching on fp condition codes, introducing branching on carry set.
author | Stefan Anzinger <stefan.anzinger@gmail.com> |
---|---|
date | Fri, 08 Aug 2014 09:24:44 -0700 |
parents | 4ca6dc0799b6 |
children | 52b4284cb496 |
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/* * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "memory/universe.hpp" #include "oops/oop.inline.hpp" #include "classfile/symbolTable.hpp" #include "classfile/classLoaderData.hpp" #include "prims/whitebox.hpp" #include "prims/wbtestmethods/parserTests.hpp" #include "runtime/arguments.hpp" #include "runtime/interfaceSupport.hpp" #include "runtime/os.hpp" #include "utilities/debug.hpp" #include "utilities/macros.hpp" #include "utilities/exceptions.hpp" #if INCLUDE_ALL_GCS #include "gc_implementation/g1/concurrentMark.hpp" #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" #include "gc_implementation/g1/heapRegionRemSet.hpp" #endif // INCLUDE_ALL_GCS #ifdef INCLUDE_NMT #include "services/memTracker.hpp" #endif // INCLUDE_NMT #include "compiler/compileBroker.hpp" #include "runtime/compilationPolicy.hpp" #define SIZE_T_MAX_VALUE ((size_t) -1) bool WhiteBox::_used = false; WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) return (jlong)(void*)JNIHandles::resolve(obj); WB_END WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) return heapOopSize; WB_END class WBIsKlassAliveClosure : public KlassClosure { Symbol* _name; bool _found; public: WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} void do_klass(Klass* k) { if (_found) return; Symbol* ksym = k->name(); if (ksym->fast_compare(_name) == 0) { _found = true; } } bool found() const { return _found; } }; WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) Handle h_name = JNIHandles::resolve(name); if (h_name.is_null()) return false; Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return WBIsKlassAliveClosure closure(sym); ClassLoaderDataGraph::classes_do(&closure); return closure.found(); WB_END WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) { return (jlong)Arguments::max_heap_for_compressed_oops(); } WB_END WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) { CollectorPolicy * p = Universe::heap()->collector_policy(); gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap " SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT, p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(), p->space_alignment(), p->heap_alignment()); } WB_END #ifndef PRODUCT // Forward declaration void TestReservedSpace_test(); void TestReserveMemorySpecial_test(); void TestVirtualSpace_test(); void TestMetaspaceAux_test(); #endif WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o)) #ifndef PRODUCT TestReservedSpace_test(); TestReserveMemorySpecial_test(); TestVirtualSpace_test(); TestMetaspaceAux_test(); #endif WB_END WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o)) size_t granularity = os::vm_allocation_granularity(); ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL); VirtualSpace vs; vs.initialize(rhs, 50 * granularity); //Check if constraints are complied if (!( UseCompressedOops && rhs.base() != NULL && Universe::narrow_oop_base() != NULL && Universe::narrow_oop_use_implicit_null_checks() )) { tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n " "\tUseCompressedOops is %d\n" "\trhs.base() is "PTR_FORMAT"\n" "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n" "\tUniverse::narrow_oop_use_implicit_null_checks() is %d", UseCompressedOops, rhs.base(), Universe::narrow_oop_base(), Universe::narrow_oop_use_implicit_null_checks()); return; } tty->print_cr("Reading from no access area... "); tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c", *(vs.low_boundary() - rhs.noaccess_prefix() / 2 )); WB_END static jint wb_stress_virtual_space_resize(size_t reserved_space_size, size_t magnitude, size_t iterations) { size_t granularity = os::vm_allocation_granularity(); ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL); VirtualSpace vs; if (!vs.initialize(rhs, 0)) { tty->print_cr("Failed to initialize VirtualSpace. Can't proceed."); return 3; } long seed = os::random(); tty->print_cr("Random seed is %ld", seed); os::init_random(seed); for (size_t i = 0; i < iterations; i++) { // Whether we will shrink or grow bool shrink = os::random() % 2L == 0; // Get random delta to resize virtual space size_t delta = (size_t)os::random() % magnitude; // If we are about to shrink virtual space below zero, then expand instead if (shrink && vs.committed_size() < delta) { shrink = false; } // Resizing by delta if (shrink) { vs.shrink_by(delta); } else { // If expanding fails expand_by will silently return false vs.expand_by(delta, true); } } return 0; } WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o, jlong reserved_space_size, jlong magnitude, jlong iterations)) tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", " "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude, iterations); if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) { tty->print_cr("One of variables printed above is negative. Can't proceed.\n"); return 1; } // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is // always 8 byte. That's why we should avoid overflow in case of 32bit platform. if (sizeof(size_t) < sizeof(jlong)) { jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE; if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value || iterations > size_t_max_value) { tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n"); return 2; } } return wb_stress_virtual_space_resize((size_t) reserved_space_size, (size_t) magnitude, (size_t) iterations); WB_END #if INCLUDE_ALL_GCS WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) G1CollectedHeap* g1 = G1CollectedHeap::heap(); oop result = JNIHandles::resolve(obj); const HeapRegion* hr = g1->heap_region_containing(result); return hr->isHumongous(); WB_END WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) G1CollectedHeap* g1 = G1CollectedHeap::heap(); size_t nr = g1->free_regions(); return (jlong)nr; WB_END WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) G1CollectedHeap* g1 = G1CollectedHeap::heap(); ConcurrentMark* cm = g1->concurrent_mark(); return cm->concurrent_marking_in_progress(); WB_END WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) return (jint)HeapRegion::GrainBytes; WB_END #endif // INCLUDE_ALL_GCS #if INCLUDE_NMT // Alloc memory using the test memory type so that we can use that to see if // NMT picks it up correctly WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size)) jlong addr = 0; if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) { addr = (jlong)(uintptr_t)os::malloc(size, mtTest); } return addr; WB_END // Free the memory allocated by NMTAllocTest WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) os::free((void*)(uintptr_t)mem, mtTest); WB_END WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size)) jlong addr = 0; if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) { addr = (jlong)(uintptr_t)os::reserve_memory(size); MemTracker::record_virtual_memory_type((address)addr, mtTest); } return addr; WB_END WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem); MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest); WB_END WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) os::uncommit_memory((char *)(uintptr_t)addr, size); WB_END WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) os::release_memory((char *)(uintptr_t)addr, size); WB_END // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env)) if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { return false; } return MemTracker::wbtest_wait_for_data_merge(); WB_END WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env)) return MemTracker::tracking_level() == MemTracker::NMT_detail; WB_END #endif // INCLUDE_NMT static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { assert(method != NULL, "method should not be null"); ThreadToNativeFromVM ttn(thread); return env->FromReflectedMethod(method); } WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) MutexLockerEx mu(Compile_lock); CodeCache::mark_all_nmethods_for_deoptimization(); VM_Deoptimize op; VMThread::execute(&op); WB_END WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); MutexLockerEx mu(Compile_lock); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); int result = 0; nmethod* code; if (is_osr) { int bci = InvocationEntryBci; while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) { code->mark_for_deoptimization(); ++result; bci = code->osr_entry_bci() + 1; } } else { code = mh->code(); } if (code != NULL) { code->mark_for_deoptimization(); ++result; } result += CodeCache::mark_for_deoptimization(mh()); if (result > 0) { VM_Deoptimize op; VMThread::execute(&op); } return result; WB_END WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); MutexLockerEx mu(Compile_lock); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); if (code == NULL) { return JNI_FALSE; } return (code->is_alive() && !code->is_marked_for_deoptimization()); WB_END WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); MutexLockerEx mu(Compile_lock); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); if (is_osr) { return CompilationPolicy::can_be_osr_compiled(mh, comp_level); } else { return CompilationPolicy::can_be_compiled(mh, comp_level); } WB_END WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); MutexLockerEx mu(Compile_lock); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); return mh->queued_for_compilation(); WB_END WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); return (code != NULL ? code->comp_level() : CompLevel_none); WB_END WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); if (is_osr) { mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox"); } else { mh->set_not_compilable(comp_level, true /* report */, "WhiteBox"); } WB_END WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false); return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci); WB_END WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); bool result = mh->dont_inline(); mh->set_dont_inline(value == JNI_TRUE); return result; WB_END WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level)) if (comp_level == CompLevel_any) { return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; } else { return CompileBroker::queue_size(comp_level); } WB_END WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); bool result = mh->force_inline(); mh->set_force_inline(value == JNI_TRUE); return result; WB_END WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD); MutexLockerEx mu(Compile_lock); return (mh->queued_for_compilation() || nm != NULL); WB_END WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method)) jmethodID jmid = reflected_method_to_jmid(thread, env, method); methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); MutexLockerEx mu(Compile_lock); MethodData* mdo = mh->method_data(); MethodCounters* mcs = mh->method_counters(); if (mdo != NULL) { mdo->init(); ResourceMark rm; int arg_count = mdo->method()->size_of_parameters(); for (int i = 0; i < arg_count; i++) { mdo->set_arg_modified(i, 0); } } mh->clear_not_c1_compilable(); mh->clear_not_c2_compilable(); mh->clear_not_c2_osr_compilable(); NOT_PRODUCT(mh->set_compiled_invocation_count(0)); if (mcs != NULL) { mcs->backedge_counter()->init(); mcs->invocation_counter()->init(); mcs->set_interpreter_invocation_count(0); mcs->set_interpreter_throwout_count(0); #ifdef TIERED mcs->set_rate(0.0F); mh->set_prev_event_count(0, THREAD); mh->set_prev_time(0, THREAD); #endif } WB_END WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) ResourceMark rm(THREAD); int len; jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false); return (StringTable::lookup(name, len) != NULL); WB_END WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); Universe::heap()->collect(GCCause::_last_ditch_collection); WB_END WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o)) // static+volatile in order to force the read to happen // (not be eliminated by the compiler) static char c; static volatile char* p; p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0); if (p == NULL) { THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory"); } c = *p; WB_END //Some convenience methods to deal with objects from java int WhiteBox::offset_for_field(const char* field_name, oop object, Symbol* signature_symbol) { assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); Thread* THREAD = Thread::current(); //Get the class of our object Klass* arg_klass = object->klass(); //Turn it into an instance-klass InstanceKlass* ik = InstanceKlass::cast(arg_klass); //Create symbols to look for in the class TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), THREAD); //To be filled in with an offset of the field we're looking for fieldDescriptor fd; Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); if (res == NULL) { tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); fatal("Invalid layout of preloaded class"); } //fetch the field at the offset we've found int dest_offset = fd.offset(); return dest_offset; } const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { int offset = offset_for_field(field_name, object, vmSymbols::string_signature()); oop string = object->obj_field(offset); if (string == NULL) { return NULL; } const char* ret = java_lang_String::as_utf8_string(string); return ret; } bool WhiteBox::lookup_bool(const char* field_name, oop object) { int offset = offset_for_field(field_name, object, vmSymbols::bool_signature()); bool ret = (object->bool_field(offset) == JNI_TRUE); return ret; } #define CC (char*) static JNINativeMethod methods[] = { {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, {CC"parseCommandLine", CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", (void*) &WB_ParseCommandLine }, {CC"getCompressedOopsMaxHeapSize", CC"()J", (void*)&WB_GetCompressedOopsMaxHeapSize}, {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes }, {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests}, {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea}, {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize}, #if INCLUDE_ALL_GCS {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, #endif // INCLUDE_ALL_GCS #if INCLUDE_NMT {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, {CC"NMTWaitForDataMerge", CC"()Z", (void*)&WB_NMTWaitForDataMerge}, {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported}, #endif // INCLUDE_NMT {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_DeoptimizeMethod }, {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_IsMethodCompiled }, {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z", (void*)&WB_IsMethodCompilable}, {CC"isMethodQueuedForCompilation", CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation}, {CC"makeMethodNotCompilable", CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable}, {CC"testSetDontInlineMethod", CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod}, {CC"getMethodCompilationLevel", CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel}, {CC"getMethodEntryBci", CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci}, {CC"getCompileQueueSize", CC"(I)I", (void*)&WB_GetCompileQueueSize}, {CC"testSetForceInlineMethod", CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod}, {CC"enqueueMethodForCompilation", CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation}, {CC"clearMethodState", CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState}, {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, {CC"fullGC", CC"()V", (void*)&WB_FullGC }, {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory }, }; #undef CC JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) { if (WhiteBoxAPI) { // Make sure that wbclass is loaded by the null classloader instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); Handle loader(ikh->class_loader()); if (loader.is_null()) { ResourceMark rm; ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI bool result = true; // one by one registration natives for exception catching jclass exceptionKlass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string()); for (int i = 0, n = sizeof(methods) / sizeof(methods[0]); i < n; ++i) { if (env->RegisterNatives(wbclass, methods + i, 1) != 0) { result = false; if (env->ExceptionCheck() && env->IsInstanceOf(env->ExceptionOccurred(), exceptionKlass)) { // j.l.NoSuchMethodError is thrown when a method can't be found or a method is not native // ignoring the exception tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", methods[i].name, methods[i].signature); env->ExceptionClear(); } else { // register is failed w/o exception or w/ unexpected exception tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", methods[i].name, methods[i].signature); env->UnregisterNatives(wbclass); break; } } } if (result) { WhiteBox::set_used(); } } } } JVM_END