author | nloodin |
Thu, 15 Mar 2012 13:37:13 +0100 | |
changeset 12262 | fb3b9fede660 |
parent 12095 | cc3d6f08a4c4 |
child 13200 | 7b506e7b406e |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "memory/universe.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "classfile/symbolTable.hpp" |
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#include "prims/whitebox.hpp" |
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#include "prims/wbtestmethods/parserTests.hpp" |
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#include "runtime/interfaceSupport.hpp" |
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#include "runtime/os.hpp" |
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#include "utilities/debug.hpp" |
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#ifndef SERIALGC |
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#include "gc_implementation/g1/concurrentMark.hpp" |
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#include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
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#include "gc_implementation/g1/heapRegionRemSet.hpp" |
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#endif // !SERIALGC |
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bool WhiteBox::_used = false; |
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WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) |
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return (jlong)(void*)JNIHandles::resolve(obj); |
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WB_END |
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WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) |
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return heapOopSize; |
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WB_END |
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#ifndef SERIALGC |
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WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) |
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G1CollectedHeap* g1 = G1CollectedHeap::heap(); |
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oop result = JNIHandles::resolve(obj); |
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const HeapRegion* hr = g1->heap_region_containing(result); |
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return hr->isHumongous(); |
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WB_END |
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WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) |
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G1CollectedHeap* g1 = G1CollectedHeap::heap(); |
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size_t nr = g1->free_regions(); |
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return (jlong)nr; |
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WB_END |
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WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) |
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G1CollectedHeap* g1 = G1CollectedHeap::heap(); |
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ConcurrentMark* cm = g1->concurrent_mark(); |
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return cm->concurrent_marking_in_progress(); |
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WB_END |
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WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) |
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return (jint)HeapRegion::GrainBytes; |
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WB_END |
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#endif // !SERIALGC |
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//Some convenience methods to deal with objects from java |
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int WhiteBox::offset_for_field(const char* field_name, oop object, |
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Symbol* signature_symbol) { |
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assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); |
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Thread* THREAD = Thread::current(); |
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//Get the class of our object |
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klassOop arg_klass = object->klass(); |
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//Turn it into an instance-klass |
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instanceKlass* ik = instanceKlass::cast(arg_klass); |
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//Create symbols to look for in the class |
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TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), |
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THREAD); |
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//To be filled in with an offset of the field we're looking for |
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fieldDescriptor fd; |
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klassOop res = ik->find_field(name_symbol, signature_symbol, &fd); |
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if (res == NULL) { |
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tty->print_cr("Invalid layout of %s at %s", ik->external_name(), |
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name_symbol->as_C_string()); |
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fatal("Invalid layout of preloaded class"); |
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} |
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//fetch the field at the offset we've found |
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int dest_offset = fd.offset(); |
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return dest_offset; |
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} |
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const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { |
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int offset = offset_for_field(field_name, object, |
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vmSymbols::string_signature()); |
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oop string = object->obj_field(offset); |
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const char* ret = java_lang_String::as_utf8_string(string); |
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return ret; |
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} |
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bool WhiteBox::lookup_bool(const char* field_name, oop object) { |
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int offset = |
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offset_for_field(field_name, object, vmSymbols::bool_signature()); |
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bool ret = (object->bool_field(offset) == JNI_TRUE); |
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return ret; |
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} |
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#define CC (char*) |
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static JNINativeMethod methods[] = { |
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{CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, |
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{CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, |
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{CC "parseCommandLine", |
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CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", |
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(void*) &WB_ParseCommandLine |
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}, |
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#ifndef SERIALGC |
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{CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, |
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{CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, |
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{CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, |
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{CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, |
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#endif // !SERIALGC |
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}; |
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#undef CC |
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JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) |
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{ |
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if (WhiteBoxAPI) { |
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// Make sure that wbclass is loaded by the null classloader |
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instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); |
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Handle loader(ikh->class_loader()); |
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if (loader.is_null()) { |
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ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI |
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jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0])); |
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if (result == 0) { |
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WhiteBox::set_used(); |
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} |
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} |
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} |
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} |
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JVM_END |