| /* |
| * 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 <stdio.h> |
| #include <string.h> |
| #include "jvmti.h" |
| #include "agent_common.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 |
| #define SCALE_SIZE (JVMTI_MAX_EVENT_TYPE_VAL + 1) |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiCapabilities caps; |
| static jvmtiEventCallbacks callbacks; |
| static jrawMonitorID access_lock; |
| static jint result = PASSED; |
| static jboolean printdump = JNI_FALSE; |
| static int flag = 0; |
| static unsigned char enbl_scale[SCALE_SIZE]; |
| static unsigned char ev_scale[SCALE_SIZE]; |
| |
| void mark(jvmtiEnv *jvmti_env, jvmtiEvent kind) { |
| jvmtiError err; |
| |
| if (printdump == JNI_TRUE) { |
| printf(">>> catching %s\n", TranslateEvent(kind)); |
| } |
| err = (*jvmti_env)->RawMonitorEnter(jvmti_env, access_lock); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(RawMonitorEnter) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| if (enbl_scale[kind] != 1) { |
| printf("Wrong notification: event %s (%d) has not been enabled\n", |
| TranslateEvent(kind), kind); |
| result = STATUS_FAILED; |
| } |
| ev_scale[kind] = 1; |
| err = (*jvmti_env)->RawMonitorExit(jvmti_env, access_lock); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(RawMonitorExit) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } |
| |
| void disable(jvmtiEnv *jvmti_env, jvmtiEvent kind) { |
| jvmtiError err; |
| |
| if (printdump == JNI_TRUE) { |
| printf(">>> disabling %s\n", TranslateEvent(kind)); |
| } |
| err = (*jvmti_env)->SetEventNotificationMode(jvmti_env, |
| JVMTI_DISABLE, kind, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Fail to disable %s: %s (%d)\n", |
| TranslateEvent(kind), TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } |
| |
| void enable(jvmtiEnv *jvmti_env, jvmtiEvent kind) { |
| jvmtiError err; |
| |
| if (printdump == JNI_TRUE) { |
| printf(">>> enabling %s\n", TranslateEvent(kind)); |
| } |
| err = (*jvmti_env)->RawMonitorEnter(jvmti_env, access_lock); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(RawMonitorEnter) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| err = (*jvmti_env)->SetEventNotificationMode(jvmti_env, |
| JVMTI_ENABLE, kind, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Fail to enable %s: %s (%d)\n", |
| TranslateEvent(kind), TranslateError(err), err); |
| result = STATUS_FAILED; |
| } else { |
| enbl_scale[kind] = 1; |
| } |
| err = (*jvmti_env)->RawMonitorExit(jvmti_env, access_lock); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(RawMonitorExit) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } |
| |
| void setWatches(jvmtiEnv *jvmti_env, JNIEnv *env, jclass cls) { |
| jvmtiError err; |
| jfieldID fid; |
| jmethodID mid; |
| |
| mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, cls), |
| "meth01", "(I)V"); |
| err = (*jvmti)->SetBreakpoint(jvmti, mid, 0); |
| if (err == JVMTI_ERROR_NONE) { |
| enable(jvmti_env, JVMTI_EVENT_BREAKPOINT); |
| } else { |
| result = STATUS_FAILED; |
| printf("(SetBreakpoint) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| } |
| |
| fid = JNI_ENV_PTR(env)->GetStaticFieldID(JNI_ENV_ARG(env, cls), "fld", "I"); |
| if (caps.can_generate_field_access_events) { |
| err = (*jvmti)->SetFieldAccessWatch(jvmti, cls, fid); |
| if (err == JVMTI_ERROR_NONE) { |
| enable(jvmti_env, JVMTI_EVENT_FIELD_ACCESS); |
| } else { |
| result = STATUS_FAILED; |
| printf("(SetFieldAccessWatch) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| } |
| } else { |
| printf("Warning: SetFieldAccessWatch is not implemented\n"); |
| } |
| |
| if (caps.can_generate_field_modification_events) { |
| err = (*jvmti_env)->SetFieldModificationWatch(jvmti_env, cls, fid); |
| if (err == JVMTI_ERROR_NONE) { |
| enable(jvmti_env, JVMTI_EVENT_FIELD_MODIFICATION); |
| } else { |
| result = STATUS_FAILED; |
| printf("(SetFieldModificationWatch) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| } |
| } else { |
| printf("Warning: SetFieldModificationWatch is not implemented\n"); |
| } |
| } |
| |
| void JNICALL VMInit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr) { |
| if (printdump == JNI_TRUE) { |
| printf(">>> VMInit\n"); |
| } |
| enable(jvmti_env, JVMTI_EVENT_SINGLE_STEP); |
| enable(jvmti_env, JVMTI_EVENT_EXCEPTION); |
| enable(jvmti_env, JVMTI_EVENT_EXCEPTION_CATCH); |
| mark(jvmti_env, JVMTI_EVENT_VM_INIT); |
| flag = 1; |
| } |
| |
| void JNICALL SingleStep(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jmethodID method, jlocation location) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_SINGLE_STEP); |
| disable(jvmti_env, JVMTI_EVENT_SINGLE_STEP); |
| } |
| } |
| |
| void JNICALL MethodEntry(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thr, jmethodID method) { |
| jvmtiError err; |
| jboolean isNative; |
| |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_METHOD_ENTRY); |
| err = (*jvmti_env)->IsMethodNative(jvmti_env, method, &isNative); |
| if (err != JVMTI_ERROR_NONE) { |
| result = STATUS_FAILED; |
| printf("(IsMethodNative) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| } |
| if (isNative == JNI_FALSE) { |
| err = (*jvmti_env)->NotifyFramePop(jvmti_env, thr, 0); |
| if (err == JVMTI_ERROR_NONE) { |
| enable(jvmti_env, JVMTI_EVENT_FRAME_POP); |
| } else { |
| result = STATUS_FAILED; |
| printf("(NotifyFramePop) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| } |
| } |
| enable(jvmti_env, JVMTI_EVENT_CLASS_LOAD); |
| enable(jvmti_env, JVMTI_EVENT_CLASS_PREPARE); |
| disable(jvmti_env, JVMTI_EVENT_METHOD_ENTRY); |
| } |
| } |
| |
| void JNICALL ExceptionCatch(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr, |
| jmethodID method, jlocation location, jobject exception) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_EXCEPTION_CATCH); |
| } |
| } |
| |
| void JNICALL MethodExit(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thr, jmethodID method, |
| jboolean was_poped_by_exc, jvalue return_value) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_METHOD_EXIT); |
| disable(jvmti_env, JVMTI_EVENT_METHOD_EXIT); |
| } |
| } |
| |
| void JNICALL ThreadStart(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_THREAD_START); |
| } |
| } |
| |
| void JNICALL ThreadEnd(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_THREAD_END); |
| } |
| } |
| |
| void JNICALL ClassLoad(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jclass klass) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_CLASS_LOAD); |
| } |
| } |
| |
| void JNICALL ClassPrepare(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jclass klass) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_CLASS_PREPARE); |
| } |
| } |
| |
| void JNICALL Exception(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr, |
| jmethodID method, jlocation location, jobject exception, |
| jmethodID catch_method, jlocation catch_location) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_EXCEPTION); |
| } |
| } |
| |
| void JNICALL FieldAccess(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr, |
| jmethodID method, jlocation location, jclass field_klass, jobject obj, jfieldID field) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_FIELD_ACCESS); |
| } |
| } |
| |
| void JNICALL FieldModification(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thr, jmethodID method, jlocation location, jclass field_klass, jobject obj, |
| jfieldID field, char sig, jvalue new_value) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_FIELD_MODIFICATION); |
| } |
| } |
| |
| void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jmethodID method, jlocation location) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_BREAKPOINT); |
| } |
| } |
| |
| void JNICALL FramePop(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jmethodID method, jboolean wasPopedByException) { |
| if (flag) { |
| mark(jvmti_env, JVMTI_EVENT_FRAME_POP); |
| } |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_setnotif001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_setnotif001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_setnotif001(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jint res; |
| jvmtiError err; |
| |
| if (options != NULL && strcmp(options, "printdump") == 0) { |
| printdump = JNI_TRUE; |
| } |
| |
| memset(enbl_scale, 0, SCALE_SIZE); |
| memset(ev_scale, 0, SCALE_SIZE); |
| |
| 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; |
| } |
| |
| err = (*jvmti)->CreateRawMonitor(jvmti, "_access_lock", &access_lock); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(CreateRawMonitor) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| callbacks.VMInit = &VMInit; |
| callbacks.ThreadStart = &ThreadStart; |
| callbacks.ThreadEnd = &ThreadEnd; |
| callbacks.ClassLoad = &ClassLoad; |
| callbacks.ClassPrepare = &ClassPrepare; |
| |
| if (caps.can_generate_method_entry_events) { |
| callbacks.MethodEntry = &MethodEntry; |
| } |
| if (caps.can_generate_method_exit_events) { |
| callbacks.MethodExit = &MethodExit; |
| } |
| if (caps.can_generate_breakpoint_events) { |
| callbacks.Breakpoint = &Breakpoint; |
| } |
| if (caps.can_generate_single_step_events) { |
| callbacks.SingleStep = &SingleStep; |
| } |
| if (caps.can_generate_frame_pop_events) { |
| callbacks.FramePop = &FramePop; |
| } |
| if (caps.can_generate_exception_events) { |
| callbacks.Exception = &Exception; |
| callbacks.ExceptionCatch = &ExceptionCatch; |
| } |
| if (caps.can_generate_field_access_events) { |
| callbacks.FieldAccess = &FieldAccess; |
| } |
| if (caps.can_generate_field_modification_events) { |
| callbacks.FieldModification = &FieldModification; |
| } |
| 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; |
| } |
| |
| enable(jvmti, JVMTI_EVENT_VM_INIT); |
| |
| return JNI_OK; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_SetEventNotificationMode_setnotif001_enableEv(JNIEnv *env, |
| jclass cls) { |
| setWatches(jvmti, env, cls); |
| enable(jvmti, JVMTI_EVENT_METHOD_ENTRY); |
| enable(jvmti, JVMTI_EVENT_METHOD_EXIT); |
| enable(jvmti, JVMTI_EVENT_THREAD_START); |
| enable(jvmti, JVMTI_EVENT_THREAD_END); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_SetEventNotificationMode_setnotif001_getRes(JNIEnv *env, |
| jclass cls) { |
| jint i; |
| |
| for (i = 0; i < SCALE_SIZE; i++) { |
| if (enbl_scale[i] == 1 && ev_scale[i] == 0) { |
| printf("No notification: event %s (%d)\n", TranslateEvent(i), i); |
| result = STATUS_FAILED; |
| } |
| if (printdump == JNI_TRUE && ev_scale[i] > 0) { |
| printf(">>> %s (%d), notifications: %d\n", |
| TranslateEvent(i), i, ev_scale[i]); |
| } |
| } |
| return result; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
