| /* |
| * Copyright (c) 2019, 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 <string.h> |
| #include "jvmti.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define AGENT_NAME "agent2" |
| |
| static JavaVM *java_vm = NULL; |
| static jthread exp_thread = NULL; |
| static jvmtiEnv *jvmti2 = NULL; |
| static jint agent2_event_count = 0; |
| static jboolean fail_status = JNI_FALSE; |
| |
| static void |
| check_jvmti_status(JNIEnv* env, jvmtiError err, const char* msg) { |
| if (err != JVMTI_ERROR_NONE) { |
| printf("check_jvmti_status: JVMTI function returned error: %d\n", err); |
| fail_status = JNI_TRUE; |
| (*env)->FatalError(env, msg); |
| } |
| } |
| |
| static void JNICALL |
| CompiledMethodLoad(jvmtiEnv* jvmti, jmethodID method, |
| jint code_size, const void* code_addr, |
| jint map_length, const jvmtiAddrLocationMap* map, |
| const void* compile_info) { |
| JNIEnv* env = NULL; |
| jthread thread = NULL; |
| char* name = NULL; |
| char* sign = NULL; |
| jvmtiError err; |
| |
| // Posted on JavaThread's, so it is legal to obtain JNIEnv* |
| if ((*java_vm)->GetEnv(java_vm, (void **) (&env), JNI_VERSION_9) != JNI_OK) { |
| fail_status = JNI_TRUE; |
| return; |
| } |
| |
| err = (*jvmti)->GetCurrentThread(jvmti, &thread); |
| check_jvmti_status(env, err, "CompiledMethodLoad: Error in JVMTI GetCurrentThread"); |
| if (!(*env)->IsSameObject(env, thread, exp_thread)) { |
| return; // skip events from unexpected threads |
| } |
| agent2_event_count++; |
| |
| err = (*jvmti)->GetMethodName(jvmti, method, &name, &sign, NULL); |
| check_jvmti_status(env, err, "CompiledMethodLoad: Error in JVMTI GetMethodName"); |
| |
| printf("%s: CompiledMethodLoad: %s%s\n", AGENT_NAME, name, sign); |
| fflush(0); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) { |
| jvmtiEventCallbacks callbacks; |
| jvmtiCapabilities caps; |
| jvmtiError err; |
| |
| java_vm = jvm; |
| if ((*jvm)->GetEnv(jvm, (void **) (&jvmti2), JVMTI_VERSION_9) != JNI_OK) { |
| return JNI_ERR; |
| } |
| |
| memset(&callbacks, 0, sizeof(callbacks)); |
| callbacks.CompiledMethodLoad = &CompiledMethodLoad; |
| |
| err = (*jvmti2)->SetEventCallbacks(jvmti2, &callbacks, sizeof(jvmtiEventCallbacks)); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Agent_OnLoad: Error in JVMTI SetEventCallbacks: %d\n", err); |
| fail_status = JNI_TRUE; |
| return JNI_ERR; |
| } |
| |
| memset(&caps, 0, sizeof(caps)); |
| caps.can_generate_compiled_method_load_events = 1; |
| |
| err = (*jvmti2)->AddCapabilities(jvmti2, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Agent_OnLoad: Error in JVMTI AddCapabilities: %d\n", err); |
| fail_status = JNI_TRUE; |
| return JNI_ERR; |
| } |
| return JNI_OK; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_MyPackage_GenerateEventsTest_agent2SetThread(JNIEnv *env, jclass cls, jthread thread) { |
| jvmtiError err; |
| |
| exp_thread = (jthread)(*env)->NewGlobalRef(env, thread); |
| |
| err = (*jvmti2)->SetEventNotificationMode(jvmti2, JVMTI_ENABLE, JVMTI_EVENT_COMPILED_METHOD_LOAD, NULL); |
| check_jvmti_status(env, err, "setThread2: Error in JVMTI SetEventNotificationMode: JVMTI_ENABLE"); |
| } |
| |
| JNIEXPORT jboolean JNICALL |
| Java_MyPackage_GenerateEventsTest_agent2FailStatus(JNIEnv *env, jclass cls) { |
| jvmtiError err; |
| |
| err = (*jvmti2)->SetEventNotificationMode(jvmti2, JVMTI_DISABLE, JVMTI_EVENT_COMPILED_METHOD_LOAD, NULL); |
| check_jvmti_status(env, err, "check2: Error in JVMTI SetEventNotificationMode: JVMTI_DISABLE"); |
| |
| printf("\n"); |
| if (agent2_event_count == 0) { |
| printf("check2: Zero events in agent2 as expected\n"); |
| } else { |
| fail_status = JNI_TRUE; |
| printf("check2: Unexpected non-zero event count in agent2: %d\n", agent2_event_count); |
| } |
| printf("\n"); |
| fflush(0); |
| |
| return fail_status; |
| } |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |