237 lines
7.2 KiB
C
237 lines
7.2 KiB
C
/*
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* Copyright (c) 2007, 2018, 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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <jni.h>
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#include <jvmti.h>
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#include <aod.h>
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#include <jvmti_aod.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define OBJECTS_FOR_ALLOCATION_TEST_CLASS_NAME "Lnsk/jvmti/AttachOnDemand/attach022/ClassForAllocationEventsTest;"
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static jvmtiEnv* jvmti;
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static Options* options = NULL;
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static const char* agentName;
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static jvmtiEvent testEvents[] = {JVMTI_EVENT_OBJECT_FREE, JVMTI_EVENT_VM_OBJECT_ALLOC};
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static const int testEventsNumber = 2;
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static volatile int taggedObjectsCounter = 0;
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static volatile int freedObjectsCounter = 0;
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static jrawMonitorID objectTagMonitor;
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static jrawMonitorID objectFreeMonitor;
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volatile int success = 1;
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volatile int agentFinished;
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void shutdownAgent(JNIEnv* jni) {
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if (agentFinished)
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return;
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if (!nsk_jvmti_aod_disableEvents(jvmti, testEvents, testEventsNumber))
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success = 0;
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nsk_aod_agentFinished(jni, agentName, success);
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agentFinished = 1;
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}
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JNIEXPORT jboolean JNICALL
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Java_nsk_jvmti_AttachOnDemand_attach022_attach022Target_shutdownAgent(JNIEnv * jni,
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jclass klass, jint expectedTaggedObjectsCounter) {
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if (taggedObjectsCounter != expectedTaggedObjectsCounter) {
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success = 0;
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NSK_COMPLAIN2("ERROR: unexpected taggedObjectsCounter: %d (expected value is %d)\n", taggedObjectsCounter, expectedTaggedObjectsCounter);
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}
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if (taggedObjectsCounter != freedObjectsCounter) {
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success = 0;
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NSK_COMPLAIN2("ERROR: taggedObjectsCounter != freedObjectsCounter (taggedObjectsCounter: %d, freedObjectsCounter: %d)\n",
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taggedObjectsCounter, freedObjectsCounter);
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}
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shutdownAgent(jni);
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return success ? JNI_TRUE : JNI_FALSE;
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}
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void JNICALL objectFreeHandler(jvmtiEnv *jvmti, jlong tag) {
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NSK_DISPLAY2("%s: ObjectFree event received (object tag: %ld)\n", agentName, tag);
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if (NSK_JVMTI_VERIFY(NSK_CPP_STUB2(
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RawMonitorEnter, jvmti, objectFreeMonitor))) {
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freedObjectsCounter++;
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, objectFreeMonitor))) {
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success = 0;
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}
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} else {
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success = 0;
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}
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}
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#define ATTACH022_TARGET_APP_CLASS_NAME "nsk/jvmti/AttachOnDemand/attach022/attach022Target"
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int registerNativeMethods(JNIEnv* jni) {
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jclass appClass;
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JNINativeMethod nativeMethods[] = {
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{"shutdownAgent", "(I)Z", (void*) Java_nsk_jvmti_AttachOnDemand_attach022_attach022Target_shutdownAgent}};
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jint nativeMethodsNumber = 1;
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if (!NSK_JNI_VERIFY(jni, (appClass =
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NSK_CPP_STUB2(FindClass, jni, ATTACH022_TARGET_APP_CLASS_NAME)) != NULL)) {
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return NSK_FALSE;
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}
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if (!NSK_JNI_VERIFY(jni,
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(NSK_CPP_STUB4(RegisterNatives, jni, appClass, nativeMethods, nativeMethodsNumber) == 0))) {
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return NSK_FALSE;
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}
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return NSK_TRUE;
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}
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void JNICALL vmObjectAllocHandler(jvmtiEnv * jvmti,
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JNIEnv * jni,
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jthread thread,
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jobject object,
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jclass object_class,
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jlong size) {
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char className[MAX_STRING_LENGTH];
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if (!nsk_jvmti_aod_getClassName(jvmti, object_class, className)) {
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success = 0;
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shutdownAgent(jni);
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return;
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}
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NSK_DISPLAY2("%s: ObjectAlloc event received (object class: %s)\n", agentName, className);
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if (!strcmp(className, OBJECTS_FOR_ALLOCATION_TEST_CLASS_NAME)) {
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if (NSK_JVMTI_VERIFY(NSK_CPP_STUB2(
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RawMonitorEnter, jvmti, objectTagMonitor))) {
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jlong tagValue = taggedObjectsCounter + 1;
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if (!NSK_JVMTI_VERIFY( NSK_CPP_STUB3(SetTag, jvmti, object, tagValue))) {
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NSK_COMPLAIN1("%s: failed to set tag\n", agentName);
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success = 0;
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} else {
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NSK_DISPLAY2("%s: object was tagged (tag value: %ld)\n", agentName, tagValue);
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taggedObjectsCounter++;
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}
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, objectTagMonitor))) {
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success = 0;
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}
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} else {
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success = 0;
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}
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}
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if (!success) {
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NSK_COMPLAIN1("%s: error happened during agent work, stop agent\n", agentName);
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shutdownAgent(jni);
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}
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNI_OnLoad_attach022Agent00(JavaVM *jvm, char *options, void *reserved) {
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return JNI_VERSION_1_8;
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}
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#endif
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JNIEXPORT jint JNICALL
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#ifdef STATIC_BUILD
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Agent_OnAttach_attach022Agent00(JavaVM *vm, char *optionsString, void *reserved)
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#else
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Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved)
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#endif
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{
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jvmtiEventCallbacks eventCallbacks;
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jvmtiCapabilities caps;
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JNIEnv* jni;
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if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL))
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return JNI_ERR;
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agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION);
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if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL)
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return JNI_ERR;
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if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL))
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return JNI_ERR;
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if (!NSK_VERIFY(registerNativeMethods(jni))) {
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return JNI_ERR;
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}
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(CreateRawMonitor, jvmti, "ObjectTagMonitor", &objectTagMonitor))) {
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return JNI_ERR;
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}
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(CreateRawMonitor, jvmti, "ObjectFreeMonitor", &objectFreeMonitor))) {
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return JNI_ERR;
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}
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memset(&caps, 0, sizeof(caps));
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caps.can_tag_objects = 1;
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caps.can_generate_object_free_events = 1;
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caps.can_generate_vm_object_alloc_events = 1;
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps)) ) {
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return JNI_ERR;
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}
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memset(&eventCallbacks,0, sizeof(eventCallbacks));
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eventCallbacks.ObjectFree = objectFreeHandler;
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eventCallbacks.VMObjectAlloc = vmObjectAllocHandler;
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks, jvmti, &eventCallbacks, sizeof(eventCallbacks))) ) {
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return JNI_ERR;
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}
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if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) {
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return JNI_ERR;
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}
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NSK_DISPLAY1("%s: initialization was done\n", agentName);
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if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName)))
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return JNI_ERR;
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return JNI_OK;
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}
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#ifdef __cplusplus
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}
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#endif
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