| /* |
| * Copyright (c) 2018, 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 <stdio.h> |
| #include <string.h> |
| #include "jvmti.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifndef JNI_ENV_ARG |
| |
| #ifdef __cplusplus |
| #define JNI_ENV_ARG(x, y) y |
| #define JNI_ENV_PTR(x) x |
| #else |
| #define JNI_ENV_ARG(x,y) x, y |
| #define JNI_ENV_PTR(x) (*x) |
| #endif |
| |
| #endif |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiCapabilities caps; |
| static jvmtiEventCallbacks callbacks; |
| static jboolean framePopReceived = JNI_FALSE; |
| |
| static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved); |
| |
| JNIEXPORT |
| jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| |
| JNIEXPORT |
| jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| |
| JNIEXPORT |
| jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) { |
| return JNI_VERSION_9; |
| } |
| |
| |
| static void reportError(const char *msg, int err) { |
| fprintf(stdout, "%s, error: %d\n", msg, err); |
| fflush(stdout); |
| } |
| |
| |
| static void JNICALL |
| FramePop(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread, |
| jmethodID method, jboolean wasPoppedByException) |
| { |
| jvmtiError err; |
| jclass cls = NULL; |
| char* csig = NULL; |
| char* name = NULL; |
| char* sign = NULL; |
| |
| framePopReceived = JNI_TRUE; |
| |
| err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, method, &cls); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("FramePop: GetMethodDeclaringClass failed", err); |
| } |
| err = (*jvmti_env)->GetClassSignature(jvmti_env, cls, &csig, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("FramePop: GetClassSignature failed", err); |
| } |
| err = (*jvmti_env)->GetMethodName(jvmti_env, method, &name, &sign, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("FramePop: GetMethodName failed", err); |
| } |
| fprintf(stdout, "FramePop event from method: %s %s%s\n", csig, name, sign); |
| fflush(stdout); |
| |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)csig); |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)name); |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)sign); |
| } |
| |
| static |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jint res; |
| jvmtiError err; |
| |
| res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), JVMTI_VERSION_9); |
| if (res != JNI_OK || jvmti == NULL) { |
| reportError("GetEnv(JVMTI_VERSION_9) failed", res); |
| return JNI_ERR; |
| } |
| err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("GetPotentialCapabilities failed", err); |
| return JNI_ERR; |
| } |
| err = (*jvmti)->AddCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("AddCapabilities failed",err); |
| return JNI_ERR; |
| } |
| err = (*jvmti)->GetCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("GetCapabilities failed", err); |
| return JNI_ERR; |
| } |
| if (caps.can_generate_frame_pop_events) { |
| callbacks.FramePop = &FramePop; |
| err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks)); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("SetEventCallbacks failed", err); |
| return JNI_ERR; |
| } |
| } |
| return JNI_OK; |
| } |
| |
| JNIEXPORT jboolean JNICALL |
| Java_NotifyFramePopTest_canGenerateFramePopEvents(JNIEnv *env, jclass cls) { |
| return caps.can_generate_frame_pop_events ? JNI_TRUE : JNI_FALSE; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_NotifyFramePopTest_setFramePopNotificationMode(JNIEnv *env, jclass cl, jboolean enable) { |
| jvmtiEventMode mode = enable ? JVMTI_ENABLE : JVMTI_DISABLE; |
| jvmtiError err = (*jvmti)->SetEventNotificationMode(jvmti, mode, JVMTI_EVENT_FRAME_POP, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("Failed to set notification mode for FRAME_POP events", err); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_NotifyFramePopTest_notifyFramePop(JNIEnv *env, jclass cls, jthread thread) |
| { |
| jvmtiError err= (*jvmti)->NotifyFramePop(jvmti, thread, 1); |
| if (err != JVMTI_ERROR_NONE) { |
| reportError("NotifyFramePop failed", err); |
| } |
| } |
| |
| JNIEXPORT jboolean JNICALL |
| Java_NotifyFramePopTest_framePopReceived(JNIEnv *env, jclass cls) { |
| jboolean result = framePopReceived; |
| framePopReceived = JNI_FALSE; |
| return result; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |