| /* |
| * Copyright (c) 2003, 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 <inttypes.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include "jvmti.h" |
| #include "agent_common.h" |
| #include "jni_tools.h" |
| #include "JVMTITools.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 PASSED 0 |
| #define STATUS_FAILED 2 |
| |
| typedef struct { |
| char *cls_sig; |
| char *name; |
| char *sig; |
| jlocation loc; |
| } exit_info; |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiCapabilities caps; |
| static jvmtiEventCallbacks callbacks; |
| static jint result = PASSED; |
| static jboolean printdump = JNI_FALSE; |
| static size_t eventsExpected = 0; |
| static size_t eventsCount = 0; |
| static exit_info exits[] = { |
| {"Lnsk/jvmti/MethodExit/mexit001a;", "chain", "()V", -1}, |
| {"Lnsk/jvmti/MethodExit/mexit001a;", "dummy", "()V", 3} |
| }; |
| |
| void JNICALL MethodExit(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thr, jmethodID method, |
| jboolean was_poped_by_exc, jvalue return_value) { |
| jvmtiError err; |
| char *cls_sig, *name, *sig, *generic; |
| jclass cls; |
| jmethodID mid; |
| jlocation loc; |
| char buffer[32]; |
| |
| err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, method, &cls); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetMethodDeclaringClass) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| err = (*jvmti_env)->GetClassSignature(jvmti_env, cls, &cls_sig, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetClassSignature) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| if (cls_sig != NULL && |
| strcmp(cls_sig, "Lnsk/jvmti/MethodExit/mexit001a;") == 0) { |
| if (printdump == JNI_TRUE) { |
| printf(">>> retrieving method exit info ...\n"); |
| } |
| err = (*jvmti_env)->GetMethodName(jvmti_env, method, |
| &name, &sig, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetMethodName) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| err = (*jvmti_env)->GetFrameLocation(jvmti_env, thr, 0, &mid, &loc); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetFrameLocation) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| if (printdump == JNI_TRUE) { |
| printf(">>> class: \"%s\"\n", cls_sig); |
| printf(">>> method: \"%s%s\"\n", name, sig); |
| printf(">>> location: %s\n", jlong_to_string(loc, buffer)); |
| printf(">>> ... done\n"); |
| } |
| if (eventsCount < sizeof(exits)/sizeof(exit_info)) { |
| if (cls_sig == NULL || |
| strcmp(cls_sig, exits[eventsCount].cls_sig) != 0) { |
| printf("(exit#%" PRIuPTR ") wrong class: \"%s\"", |
| eventsCount, cls_sig); |
| printf(", expected: \"%s\"\n", exits[eventsCount].cls_sig); |
| result = STATUS_FAILED; |
| } |
| if (name == NULL || |
| strcmp(name, exits[eventsCount].name) != 0) { |
| printf("(exit#%" PRIuPTR ") wrong method name: \"%s\"", |
| eventsCount, name); |
| printf(", expected: \"%s\"\n", exits[eventsCount].name); |
| result = STATUS_FAILED; |
| } |
| if (sig == NULL || |
| strcmp(sig, exits[eventsCount].sig) != 0) { |
| printf("(exit#%" PRIuPTR ") wrong method sig: \"%s\"", |
| eventsCount, sig); |
| printf(", expected: \"%s\"\n", exits[eventsCount].sig); |
| result = STATUS_FAILED; |
| } |
| if (loc != exits[eventsCount].loc) { |
| printf("(exit#%" PRIuPTR ") wrong location: %s", |
| eventsCount, jlong_to_string(loc, buffer)); |
| printf(", expected: %s\n", |
| jlong_to_string(exits[eventsCount].loc, buffer)); |
| result = STATUS_FAILED; |
| } |
| } else { |
| printf("Unexpected method exit catched:"); |
| printf(" class: \"%s\"\n", cls_sig); |
| printf(" method: \"%s%s\"\n", name, sig); |
| printf(" location: %s\n", jlong_to_string(loc, buffer)); |
| result = STATUS_FAILED; |
| } |
| eventsCount++; |
| } |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_mexit001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_mexit001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_mexit001(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jvmtiError err; |
| jint res; |
| |
| if (options != NULL && strcmp(options, "printdump") == 0) { |
| printdump = JNI_TRUE; |
| } |
| |
| res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), |
| JVMTI_VERSION_1_1); |
| if (res != JNI_OK || jvmti == NULL) { |
| printf("Wrong result of a valid call to GetEnv!\n"); |
| return JNI_ERR; |
| } |
| |
| err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| err = (*jvmti)->AddCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(AddCapabilities) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| err = (*jvmti)->GetCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetCapabilities) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| if (caps.can_generate_method_exit_events) { |
| callbacks.MethodExit = &MethodExit; |
| err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks)); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(SetEventCallbacks) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| } else { |
| printf("Warning: MethodExit event is not implemented\n"); |
| } |
| |
| return JNI_OK; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_MethodExit_mexit001_init0(JNIEnv *env, jclass cls) { |
| jvmtiError err; |
| if (jvmti == NULL) { |
| printf("JVMTI client was not properly loaded!\n"); |
| return STATUS_FAILED; |
| } |
| |
| err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_METHOD_EXIT, NULL); |
| if (err == JVMTI_ERROR_NONE) { |
| eventsExpected = sizeof(exits)/sizeof(exit_info); |
| } else { |
| printf("Failed to enable JVMTI_EVENT_METHOD_EXIT event: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| |
| // TODO: should we return result instead? |
| return PASSED; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_MethodExit_mexit001_check(JNIEnv *env, jclass cls) { |
| jvmtiError err; |
| jclass clz; |
| jmethodID mid; |
| |
| if (jvmti == NULL) { |
| printf("JVMTI client was not properly loaded!\n"); |
| return STATUS_FAILED; |
| } |
| |
| if (!caps.can_generate_method_exit_events) { |
| return result; |
| } |
| |
| clz = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, |
| "nsk/jvmti/MethodExit/mexit001a")); |
| if (clz == NULL) { |
| printf("Cannot find nsk.jvmti.MethodExit.mexit001a class!\n"); |
| return STATUS_FAILED; |
| } |
| |
| mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, clz), |
| "dummy", "()V"); |
| if (mid == NULL) { |
| printf("Cannot find metod \"dummy()\"!\n"); |
| return STATUS_FAILED; |
| } |
| |
| JNI_ENV_PTR(env)->CallStaticVoidMethod(JNI_ENV_ARG(env, clz), mid); |
| |
| err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_DISABLE, |
| JVMTI_EVENT_METHOD_EXIT, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Failed to disable JVMTI_EVENT_METHOD_EXIT event: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| |
| if (eventsCount != eventsExpected) { |
| printf("Wrong number of MethodExit events: %" PRIuPTR ", expected: %" PRIuPTR "\n", |
| eventsCount, eventsExpected); |
| result = STATUS_FAILED; |
| } |
| return result; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_MethodExit_mexit001a_chain(JNIEnv *env, jclass cls) { |
| printf("Executing chain()\n"); |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
