196 lines
6.4 KiB
C++
196 lines
6.4 KiB
C++
/*
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* Copyright (c) 2023, 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 "jvmti_common.h"
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extern "C" {
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static jvmtiEnv *jvmti = NULL;
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static jmethodID mid_B = NULL;
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static jobject exception_obj = NULL;
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static jrawMonitorID monitor = NULL;
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static volatile bool bp_sync_reached = false;
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static void JNICALL
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Breakpoint(jvmtiEnv *jvmti, JNIEnv *jni, jthread thread,
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jmethodID method, jlocation location) {
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jvmtiError err;
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if (method != mid_B) {
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fatal(jni, "Breakpoint: Failed with wrong location: expected in method TestTask.B()");
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}
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err = jvmti->ClearBreakpoint(mid_B, 0);
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check_jvmti_status(jni, err, "Breakpoint: Failed in JVMTI ClearBreakpoint");
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LOG("Breakpoint: In method TestTask.B(): before sync section enter\n");
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err = jvmti->RawMonitorEnter(monitor);
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check_jvmti_status(jni, err, "Breakpoint: Failed in RawMonitorEnter");
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bp_sync_reached = true;
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// wait for notify from notifyAtBreakpoint or JVMTI_ERROR_INTERRUPT from JVMTI StopThread
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err = jvmti->RawMonitorWait(monitor, 0);
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if (err == JVMTI_ERROR_INTERRUPT) {
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LOG("Breakpoint: In method TestTask.B(): expected JVMTI_ERROR_INTERRUPT from RawMonitorWait\n");
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} else {
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check_jvmti_status(jni, err, "Breakpoint: Failed in RawMonitorWait");
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}
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err = jvmti->RawMonitorExit(monitor);
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check_jvmti_status(jni, err, "Breakpoint: Failed in RawMonitorExit");
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LOG("Breakpoint: In method TestTask.B(): after sync section exit\n");
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}
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jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
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static jvmtiCapabilities caps;
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static jvmtiEventCallbacks callbacks;
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jvmtiError err;
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jint res;
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LOG("Agent init\n");
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res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
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if (res != JNI_OK || jvmti == NULL) {
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LOG("Agent init: Failed in GetEnv!\n");
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return JNI_ERR;
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}
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err = jvmti->GetPotentialCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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LOG("Agent init: Failed in GetPotentialCapabilities: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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LOG("Agent init: Failed in AddCapabilities: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->GetCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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LOG("Agent init: Failed in GetCapabilities: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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if (!caps.can_generate_breakpoint_events) {
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LOG("Agent init: Failed: Breakpoint event is not implemented\n");
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return JNI_ERR;
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}
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callbacks.Breakpoint = &Breakpoint;
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err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
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if (err != JVMTI_ERROR_NONE) {
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LOG("Agent init: Failed in SetEventCallbacks: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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monitor = create_raw_monitor(jvmti, "Raw monitor to test");
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return JNI_OK;
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}
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extern JNIEXPORT jint JNICALL
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Agent_OnLoad(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 void JNICALL
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Java_StopThreadTest_prepareAgent(JNIEnv *jni, jclass cls, jclass task_clazz, jobject exc_obj) {
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jvmtiError err;
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LOG("Main: prepareAgent started\n");
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if (jvmti == NULL) {
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fatal(jni, "prepareAgent: Failed as JVMTI client was not properly loaded!\n");
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}
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exception_obj = jni->NewGlobalRef(exc_obj);
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if (exception_obj == NULL) {
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fatal(jni, "prepareAgent: Failed in JNI NewGlobalRef\n");
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}
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mid_B = jni->GetStaticMethodID(task_clazz, "B", "()V");
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if (mid_B == NULL) {
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fatal(jni, "prepareAgent: Failed to find Method ID for method: TestTask.B()\n");
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}
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err = jvmti->SetBreakpoint(mid_B, 0);
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check_jvmti_status(jni, err, "prepareAgent: Failed in JVMTI SetBreakpoint");
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set_event_notification_mode(jvmti, JVMTI_ENABLE, JVMTI_EVENT_BREAKPOINT, NULL);
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LOG("Main: prepareAgent finished\n");
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}
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JNIEXPORT void JNICALL
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Java_StopThreadTest_suspendThread(JNIEnv *jni, jclass cls, jthread thread) {
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LOG("Main: suspendThread\n");
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suspend_thread(jvmti, jni, thread);
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}
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JNIEXPORT void JNICALL
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Java_StopThreadTest_resumeThread(JNIEnv *jni, jclass cls, jthread thread) {
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LOG("Main: resumeThread\n");
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resume_thread(jvmti, jni, thread);
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}
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JNIEXPORT jint JNICALL
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Java_StopThreadTest_stopThread(JNIEnv *jni, jclass cls, jthread thread) {
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jvmtiError err = jvmti->StopThread(thread, exception_obj);
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LOG("Main: stopThread: StopThread returned code: %s (%d)\n", TranslateError(err), err);
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return (jint)err;
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}
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JNIEXPORT void JNICALL
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Java_StopThreadTest_ensureAtBreakpoint(JNIEnv *jni, jclass cls) {
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jvmtiError err;
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bool need_stop = false;
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LOG("Main: ensureAtBreakpoint\n");
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while (!need_stop) {
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err = jvmti->RawMonitorEnter(monitor);
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check_jvmti_status(jni, err, "ensureAtBreakpoint: Failed in RawMonitorEnter");
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need_stop = bp_sync_reached;
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err = jvmti->RawMonitorExit(monitor);
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check_jvmti_status(jni, err, "ensureAtBreakpoint: Failed in RawMonitorExit");
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sleep_ms(1); // 1 millisecond
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}
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}
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JNIEXPORT void JNICALL
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Java_StopThreadTest_notifyAtBreakpoint(JNIEnv *jni, jclass cls) {
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jvmtiError err;
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LOG("Main: notifyAtBreakpoint\n");
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err = jvmti->RawMonitorEnter(monitor);
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check_jvmti_status(jni, err, "notifyAtBreakpoint: Fatal Error in RawMonitorEnter");
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err = jvmti->RawMonitorNotify(monitor);
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check_jvmti_status(jni, err, "notifyAtBreakpoint: Fatal Error in RawMonitorNotify");
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err = jvmti->RawMonitorExit(monitor);
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check_jvmti_status(jni, err, "notifyAtBreakpoint: Fatal Error in RawMonitorExit");
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}
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} // extern "C"
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