72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
/*
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* Copyright 2022 Andrei Pangin
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "j9ObjectSampler.h"
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#include "j9Ext.h"
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#include "vmEntry.h"
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void J9ObjectSampler::JavaObjectAlloc(jvmtiEnv* jvmti, JNIEnv* jni, jthread thread,
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jobject object, jclass object_klass, jlong size) {
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if (_enabled && updateCounter(_allocated_bytes, size, _interval)) {
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recordAllocation(jvmti, jni, BCI_ALLOC, object, object_klass, size);
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}
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}
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void J9ObjectSampler::VMObjectAlloc(jvmtiEnv* jvmti, JNIEnv* jni, jthread thread,
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jobject object, jclass object_klass, jlong size) {
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if (_enabled && updateCounter(_allocated_bytes, size, _interval)) {
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recordAllocation(jvmti, jni, BCI_ALLOC_OUTSIDE_TLAB, object, object_klass, size);
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}
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}
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Error J9ObjectSampler::check(Arguments& args) {
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if (J9Ext::InstrumentableObjectAlloc_id < 0) {
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return Error("InstrumentableObjectAlloc is not supported on this JVM");
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}
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return Error::OK;
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}
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Error J9ObjectSampler::start(Arguments& args) {
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Error error = check(args);
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if (error) {
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return error;
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}
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_interval = args._alloc > 0 ? args._alloc : DEFAULT_ALLOC_INTERVAL;
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_allocated_bytes = 0;
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initLiveRefs(args._live);
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jvmtiEnv* jvmti = VM::jvmti();
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if (jvmti->SetExtensionEventCallback(J9Ext::InstrumentableObjectAlloc_id, (jvmtiExtensionEvent)JavaObjectAlloc) != 0) {
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return Error("Could not enable InstrumentableObjectAlloc callback");
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}
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jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_OBJECT_ALLOC, NULL);
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jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_GARBAGE_COLLECTION_START, NULL);
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return Error::OK;
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}
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void J9ObjectSampler::stop() {
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jvmtiEnv* jvmti = VM::jvmti();
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jvmti->SetEventNotificationMode(JVMTI_DISABLE, JVMTI_EVENT_GARBAGE_COLLECTION_START, NULL);
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jvmti->SetEventNotificationMode(JVMTI_DISABLE, JVMTI_EVENT_VM_OBJECT_ALLOC, NULL);
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jvmti->SetExtensionEventCallback(J9Ext::InstrumentableObjectAlloc_id, NULL);
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dumpLiveRefs();
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}
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