434 lines
14 KiB
C
434 lines
14 KiB
C
/*
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "jvmti.h"
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#include "agent_common.h"
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#include "JVMTITools.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef JNI_ENV_ARG
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#ifdef __cplusplus
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#define JNI_ENV_ARG(x, y) y
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#define JNI_ENV_PTR(x) x
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#else
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#define JNI_ENV_ARG(x,y) x, y
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#define JNI_ENV_PTR(x) (*x)
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#endif
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#endif
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#define PASSED 0
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#define STATUS_FAILED 2
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#define SCALE_SIZE (JVMTI_MAX_EVENT_TYPE_VAL + 1)
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static jvmtiEnv *jvmti = NULL;
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static jvmtiCapabilities caps;
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static jvmtiEventCallbacks callbacks;
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static jrawMonitorID access_lock;
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static jint result = PASSED;
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static jboolean printdump = JNI_FALSE;
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static int flag = 0;
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static unsigned char enbl_scale[SCALE_SIZE];
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static unsigned char ev_scale[SCALE_SIZE];
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void mark(jvmtiEnv *jvmti_env, jvmtiEvent kind) {
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jvmtiError err;
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if (printdump == JNI_TRUE) {
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printf(">>> catching %s\n", TranslateEvent(kind));
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}
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err = (*jvmti_env)->RawMonitorEnter(jvmti_env, access_lock);
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if (err != JVMTI_ERROR_NONE) {
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printf("(RawMonitorEnter) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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if (enbl_scale[kind] != 1) {
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printf("Wrong notification: event %s (%d) has not been enabled\n",
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TranslateEvent(kind), kind);
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result = STATUS_FAILED;
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}
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ev_scale[kind] = 1;
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err = (*jvmti_env)->RawMonitorExit(jvmti_env, access_lock);
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if (err != JVMTI_ERROR_NONE) {
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printf("(RawMonitorExit) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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void disable(jvmtiEnv *jvmti_env, jvmtiEvent kind) {
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jvmtiError err;
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if (printdump == JNI_TRUE) {
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printf(">>> disabling %s\n", TranslateEvent(kind));
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}
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err = (*jvmti_env)->SetEventNotificationMode(jvmti_env,
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JVMTI_DISABLE, kind, NULL);
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if (err != JVMTI_ERROR_NONE) {
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printf("Fail to disable %s: %s (%d)\n",
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TranslateEvent(kind), TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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void enable(jvmtiEnv *jvmti_env, jvmtiEvent kind) {
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jvmtiError err;
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if (printdump == JNI_TRUE) {
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printf(">>> enabling %s\n", TranslateEvent(kind));
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}
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err = (*jvmti_env)->RawMonitorEnter(jvmti_env, access_lock);
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if (err != JVMTI_ERROR_NONE) {
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printf("(RawMonitorEnter) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = (*jvmti_env)->SetEventNotificationMode(jvmti_env,
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JVMTI_ENABLE, kind, NULL);
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if (err != JVMTI_ERROR_NONE) {
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printf("Fail to enable %s: %s (%d)\n",
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TranslateEvent(kind), TranslateError(err), err);
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result = STATUS_FAILED;
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} else {
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enbl_scale[kind] = 1;
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}
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err = (*jvmti_env)->RawMonitorExit(jvmti_env, access_lock);
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if (err != JVMTI_ERROR_NONE) {
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printf("(RawMonitorExit) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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void setWatches(jvmtiEnv *jvmti_env, JNIEnv *env, jclass cls) {
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jvmtiError err;
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jfieldID fid;
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jmethodID mid;
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mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, cls),
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"meth01", "(I)V");
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err = (*jvmti)->SetBreakpoint(jvmti, mid, 0);
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if (err == JVMTI_ERROR_NONE) {
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enable(jvmti_env, JVMTI_EVENT_BREAKPOINT);
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} else {
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result = STATUS_FAILED;
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printf("(SetBreakpoint) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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}
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fid = JNI_ENV_PTR(env)->GetStaticFieldID(JNI_ENV_ARG(env, cls), "fld", "I");
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if (caps.can_generate_field_access_events) {
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err = (*jvmti)->SetFieldAccessWatch(jvmti, cls, fid);
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if (err == JVMTI_ERROR_NONE) {
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enable(jvmti_env, JVMTI_EVENT_FIELD_ACCESS);
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} else {
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result = STATUS_FAILED;
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printf("(SetFieldAccessWatch) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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}
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} else {
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printf("Warning: SetFieldAccessWatch is not implemented\n");
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}
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if (caps.can_generate_field_modification_events) {
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err = (*jvmti_env)->SetFieldModificationWatch(jvmti_env, cls, fid);
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if (err == JVMTI_ERROR_NONE) {
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enable(jvmti_env, JVMTI_EVENT_FIELD_MODIFICATION);
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} else {
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result = STATUS_FAILED;
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printf("(SetFieldModificationWatch) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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}
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} else {
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printf("Warning: SetFieldModificationWatch is not implemented\n");
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}
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}
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void JNICALL VMInit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr) {
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if (printdump == JNI_TRUE) {
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printf(">>> VMInit\n");
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}
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enable(jvmti_env, JVMTI_EVENT_SINGLE_STEP);
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enable(jvmti_env, JVMTI_EVENT_EXCEPTION);
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enable(jvmti_env, JVMTI_EVENT_EXCEPTION_CATCH);
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mark(jvmti_env, JVMTI_EVENT_VM_INIT);
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flag = 1;
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}
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void JNICALL SingleStep(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread, jmethodID method, jlocation location) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_SINGLE_STEP);
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disable(jvmti_env, JVMTI_EVENT_SINGLE_STEP);
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}
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}
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void JNICALL MethodEntry(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jmethodID method) {
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jvmtiError err;
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jboolean isNative;
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_METHOD_ENTRY);
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err = (*jvmti_env)->IsMethodNative(jvmti_env, method, &isNative);
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if (err != JVMTI_ERROR_NONE) {
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result = STATUS_FAILED;
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printf("(IsMethodNative) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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}
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if (isNative == JNI_FALSE) {
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err = (*jvmti_env)->NotifyFramePop(jvmti_env, thr, 0);
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if (err == JVMTI_ERROR_NONE) {
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enable(jvmti_env, JVMTI_EVENT_FRAME_POP);
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} else {
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result = STATUS_FAILED;
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printf("(NotifyFramePop) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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}
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}
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enable(jvmti_env, JVMTI_EVENT_CLASS_LOAD);
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enable(jvmti_env, JVMTI_EVENT_CLASS_PREPARE);
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disable(jvmti_env, JVMTI_EVENT_METHOD_ENTRY);
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}
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}
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void JNICALL ExceptionCatch(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr,
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jmethodID method, jlocation location, jobject exception) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_EXCEPTION_CATCH);
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}
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}
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void JNICALL MethodExit(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jmethodID method,
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jboolean was_poped_by_exc, jvalue return_value) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_METHOD_EXIT);
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disable(jvmti_env, JVMTI_EVENT_METHOD_EXIT);
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}
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}
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void JNICALL ThreadStart(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_THREAD_START);
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}
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}
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void JNICALL ThreadEnd(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_THREAD_END);
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}
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}
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void JNICALL ClassLoad(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread, jclass klass) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_CLASS_LOAD);
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}
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}
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void JNICALL ClassPrepare(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread, jclass klass) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_CLASS_PREPARE);
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}
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}
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void JNICALL Exception(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr,
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jmethodID method, jlocation location, jobject exception,
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jmethodID catch_method, jlocation catch_location) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_EXCEPTION);
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}
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}
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void JNICALL FieldAccess(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr,
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jmethodID method, jlocation location, jclass field_klass, jobject obj, jfieldID field) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_FIELD_ACCESS);
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}
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}
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void JNICALL FieldModification(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jmethodID method, jlocation location, jclass field_klass, jobject obj,
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jfieldID field, char sig, jvalue new_value) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_FIELD_MODIFICATION);
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}
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}
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void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread, jmethodID method, jlocation location) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_BREAKPOINT);
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}
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}
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void JNICALL FramePop(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread, jmethodID method, jboolean wasPopedByException) {
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if (flag) {
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mark(jvmti_env, JVMTI_EVENT_FRAME_POP);
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}
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_setnotif001(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNICALL Agent_OnAttach_setnotif001(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNI_OnLoad_setnotif001(JavaVM *jvm, char *options, void *reserved) {
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return JNI_VERSION_1_8;
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}
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#endif
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jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
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jint res;
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jvmtiError err;
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if (options != NULL && strcmp(options, "printdump") == 0) {
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printdump = JNI_TRUE;
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}
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memset(enbl_scale, 0, SCALE_SIZE);
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memset(ev_scale, 0, SCALE_SIZE);
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res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
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JVMTI_VERSION_1_1);
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if (res != JNI_OK || jvmti == NULL) {
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printf("Wrong result of a valid call to GetEnv !\n");
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return JNI_ERR;
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}
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err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = (*jvmti)->AddCapabilities(jvmti, &caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(AddCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = (*jvmti)->GetCapabilities(jvmti, &caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = (*jvmti)->CreateRawMonitor(jvmti, "_access_lock", &access_lock);
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if (err != JVMTI_ERROR_NONE) {
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printf("(CreateRawMonitor) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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callbacks.VMInit = &VMInit;
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callbacks.ThreadStart = &ThreadStart;
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callbacks.ThreadEnd = &ThreadEnd;
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callbacks.ClassLoad = &ClassLoad;
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callbacks.ClassPrepare = &ClassPrepare;
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if (caps.can_generate_method_entry_events) {
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callbacks.MethodEntry = &MethodEntry;
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}
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if (caps.can_generate_method_exit_events) {
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callbacks.MethodExit = &MethodExit;
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}
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if (caps.can_generate_breakpoint_events) {
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callbacks.Breakpoint = &Breakpoint;
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}
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if (caps.can_generate_single_step_events) {
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callbacks.SingleStep = &SingleStep;
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}
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if (caps.can_generate_frame_pop_events) {
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callbacks.FramePop = &FramePop;
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}
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if (caps.can_generate_exception_events) {
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callbacks.Exception = &Exception;
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callbacks.ExceptionCatch = &ExceptionCatch;
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}
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if (caps.can_generate_field_access_events) {
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callbacks.FieldAccess = &FieldAccess;
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}
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if (caps.can_generate_field_modification_events) {
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callbacks.FieldModification = &FieldModification;
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}
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err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks));
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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enable(jvmti, JVMTI_EVENT_VM_INIT);
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return JNI_OK;
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}
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JNIEXPORT void JNICALL
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Java_nsk_jvmti_SetEventNotificationMode_setnotif001_enableEv(JNIEnv *env,
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jclass cls) {
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setWatches(jvmti, env, cls);
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enable(jvmti, JVMTI_EVENT_METHOD_ENTRY);
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enable(jvmti, JVMTI_EVENT_METHOD_EXIT);
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enable(jvmti, JVMTI_EVENT_THREAD_START);
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enable(jvmti, JVMTI_EVENT_THREAD_END);
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}
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JNIEXPORT jint JNICALL
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Java_nsk_jvmti_SetEventNotificationMode_setnotif001_getRes(JNIEnv *env,
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jclass cls) {
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jint i;
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for (i = 0; i < SCALE_SIZE; i++) {
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if (enbl_scale[i] == 1 && ev_scale[i] == 0) {
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printf("No notification: event %s (%d)\n", TranslateEvent(i), i);
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result = STATUS_FAILED;
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}
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if (printdump == JNI_TRUE && ev_scale[i] > 0) {
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printf(">>> %s (%d), notifications: %d\n",
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TranslateEvent(i), i, ev_scale[i]);
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}
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}
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return result;
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}
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#ifdef __cplusplus
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}
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#endif
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