Mercurial > hg > truffle
view src/share/vm/prims/whitebox.cpp @ 7566:dea5423a9479
Exclude FastMath::slowLog for now
author | Gilles Duboscq <duboscq@ssw.jku.at> |
---|---|
date | Wed, 30 Jan 2013 16:46:15 +0100 |
parents | da91efe96a93 |
children | 4102b59539ce db9981fd3124 |
line wrap: on
line source
/* * Copyright (c) 2012, 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/interfaceSupport.hpp" #include "runtime/os.hpp" #include "utilities/debug.hpp" #ifndef SERIALGC #include "gc_implementation/g1/concurrentMark.hpp" #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" #include "gc_implementation/g1/heapRegionRemSet.hpp" #endif // !SERIALGC 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 #ifndef SERIALGC 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 // !SERIALGC //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 }, #ifndef SERIALGC {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 // !SERIALGC }; #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()) { ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0])); if (result == 0) { WhiteBox::set_used(); } } } } JVM_END