| /* |
| * Copyright (c) 2019 SAP SE. 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" |
| #include "jni.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 |
| |
| #define FAILED -1 |
| |
| static jvmtiEnv *jvmti; |
| |
| static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved); |
| |
| static void ShowErrorMessage(jvmtiEnv *jvmti, jvmtiError errCode, const char *message) { |
| char *errMsg; |
| jvmtiError result; |
| |
| result = (*jvmti)->GetErrorName(jvmti, errCode, &errMsg); |
| if (result == JVMTI_ERROR_NONE) { |
| fprintf(stderr, "%s: %s (%d)\n", message, errMsg, errCode); |
| (*jvmti)->Deallocate(jvmti, (unsigned char *)errMsg); |
| } else { |
| fprintf(stderr, "%s (%d)\n", message, errCode); |
| } |
| } |
| |
| 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) { |
| jint res; |
| JNIEnv *env; |
| |
| res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &env), |
| JNI_VERSION_9); |
| if (res != JNI_OK || env == NULL) { |
| fprintf(stderr, "Error: GetEnv call failed(%d)!\n", res); |
| return JNI_ERR; |
| } |
| |
| return JNI_VERSION_9; |
| } |
| |
| static |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jint res; |
| jvmtiError err; |
| jvmtiCapabilities caps; |
| |
| printf("Agent_OnLoad started\n"); |
| |
| memset(&caps, 0, sizeof(caps)); |
| |
| res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), |
| JVMTI_VERSION_9); |
| if (res != JNI_OK || jvmti == NULL) { |
| fprintf(stderr, "Error: wrong result of a valid call to GetEnv!\n"); |
| return JNI_ERR; |
| } |
| |
| caps.can_get_owned_monitor_stack_depth_info = 1; |
| |
| err = (*jvmti)->AddCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| ShowErrorMessage(jvmti, err, |
| "Agent_OnLoad: error in JVMTI AddCapabilities"); |
| return JNI_ERR; |
| } |
| |
| err = (*jvmti)->GetCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| ShowErrorMessage(jvmti, err, |
| "Agent_OnLoad: error in JVMTI GetCapabilities"); |
| return JNI_ERR; |
| } |
| |
| if (!caps.can_get_owned_monitor_stack_depth_info) { |
| fprintf(stderr, "Warning: GetOwnedMonitorStackDepthInfo is not implemented\n"); |
| return JNI_ERR; |
| } |
| |
| printf("Agent_OnLoad finished\n"); |
| return JNI_OK; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_GetOwnedMonitorStackDepthInfoWithEATest_getOwnedMonitorStackDepthInfo(JNIEnv *env, jclass cls, jobject targetThread, jobjectArray ownedMonitors, jintArray depths) { |
| jvmtiError err; |
| jvmtiThreadInfo threadInfo; |
| jint monitorCount; |
| jvmtiMonitorStackDepthInfo* stackDepthInfo; |
| jint* depthsPtr; |
| jint idx = 0; |
| |
| err = (*jvmti)->GetThreadInfo(jvmti, targetThread, &threadInfo); |
| if (err != JVMTI_ERROR_NONE) { |
| ShowErrorMessage(jvmti, err, |
| "getOwnedMonitorsFor: error in JVMTI GetThreadInfo"); |
| return FAILED; |
| } |
| |
| err = (*jvmti)->GetOwnedMonitorStackDepthInfo(jvmti, targetThread, &monitorCount, &stackDepthInfo); |
| if (err != JVMTI_ERROR_NONE) { |
| ShowErrorMessage(jvmti, err, |
| "getOwnedMonitorsFor: error in JVMTI GetOwnedMonitorStackDepthInfo"); |
| return FAILED; |
| } |
| |
| printf("getOwnedMonitorsFor: %s owns %d monitor(s)\n", threadInfo.name, monitorCount); |
| |
| depthsPtr = (*env)->GetIntArrayElements(env, depths, NULL); |
| for (idx = 0; idx < monitorCount; idx++) { |
| (*env)->SetObjectArrayElement(env, ownedMonitors, idx, stackDepthInfo[idx].monitor); |
| depthsPtr[idx] = stackDepthInfo[idx].stack_depth; |
| } |
| (*env)->ReleaseIntArrayElements(env, depths, depthsPtr, 0); |
| |
| (*jvmti)->Deallocate(jvmti, (unsigned char *) stackDepthInfo); |
| (*jvmti)->Deallocate(jvmti, (unsigned char *) threadInfo.name); |
| return monitorCount; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |