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/*
* Copyright (c) 2003, 2024, 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.hpp"
#include "JVMTITools.hpp"
extern "C" {
#define STATUS_FAILED 2
#define PASSED 0
static jvmtiEnv *jvmti = nullptr;
static jvmtiCapabilities caps;
static jvmtiEventCallbacks callbacks;
static int watch_ev = 0; /* ignore JVMTI events by default */
static int gen_ev = 0; /* number of generated events */
static int tot_result = PASSED; /* total result of the test */
static jrawMonitorID watch_ev_monitor;
static void set_watch_ev(int value) {
jvmti->RawMonitorEnter(watch_ev_monitor);
watch_ev = value;
jvmti->RawMonitorExit(watch_ev_monitor);
}
void JNICALL
FramePop(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread,
jmethodID method, jboolean wasPopedByException) {
jvmti->RawMonitorEnter(watch_ev_monitor);
if (watch_ev) {
printf("#### FramePop event occurred ####\n");
gen_ev++;
}
jvmti->RawMonitorExit(watch_ev_monitor);
}
void JNICALL
MethodExit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr,
jmethodID method, jboolean was_poped_by_exc, jvalue return_value) {
jvmti->RawMonitorEnter(watch_ev_monitor);
if (watch_ev) {
printf("#### MethodExit event occurred ####\n");
gen_ev++;
}
jvmti->RawMonitorExit(watch_ev_monitor);
}
JNIEXPORT jint JNICALL
Java_nsk_jvmti_PopFrame_popframe001_suspThread(JNIEnv *env, jclass cls, jobject susThr) {
if (!caps.can_pop_frame || !caps.can_suspend) {
return PASSED;
}
printf(">>>>>>>> Invoke SuspendThread()\n");
jvmtiError err = jvmti->SuspendThread(susThr);
if (err != JVMTI_ERROR_NONE) {
printf("%s: Failed to call SuspendThread(): error=%d: %s\n",
__FILE__, err, TranslateError(err));
return JNI_ERR;
}
printf("<<<<<<<< SuspendThread() is successfully done\n");
return PASSED;
}
JNIEXPORT jint JNICALL
Java_nsk_jvmti_PopFrame_popframe001_resThread(JNIEnv *env, jclass cls, jobject susThr) {
if (!caps.can_pop_frame || !caps.can_suspend) {
return PASSED;
}
printf(">>>>>>>> Invoke ResumeThread()\n");
jvmtiError err = jvmti->ResumeThread(susThr);
if (err != JVMTI_ERROR_NONE) {
printf("%s: Failed to call ResumeThread(): error=%d: %s\n",
__FILE__, err, TranslateError(err));
return JNI_ERR;
}
printf("<<<<<<<< ResumeThread() is successfully done\n");
return PASSED;
}
JNIEXPORT jint JNICALL
Java_nsk_jvmti_PopFrame_popframe001_doPopFrame(JNIEnv *env, jclass cls, jobject frameThr) {
jvmtiError err;
if (!caps.can_pop_frame || !caps.can_suspend) {
return PASSED;
}
err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,
JVMTI_EVENT_METHOD_EXIT, frameThr);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to enable METHOD_EXIT event: %s (%d)\n",
TranslateError(err), err);
tot_result = STATUS_FAILED;
}
err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,
JVMTI_EVENT_FRAME_POP, frameThr);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to enable FRAME_POP event: %s (%d)\n",
TranslateError(err), err);
tot_result = STATUS_FAILED;
}
printf(">>>>>>>> Invoke PopFrame()\n");
set_watch_ev(1); /* watch JVMTI events */
err = jvmti->PopFrame(frameThr);
if (err != JVMTI_ERROR_NONE) {
printf("TEST FAILED: the function PopFrame() returned the error %d: %s\n",
err, TranslateError(err));
printf("\tFor more info about this error see the JVMTI spec.\n");
tot_result = STATUS_FAILED;
} else {
printf("Check #1 PASSED: PopFrame() is successfully done\n");
}
set_watch_ev(0); /* ignore again JVMTI events */
if (gen_ev) {
printf("TEST FAILED: %d JVMTI events were generated by the function PopFrame()\n",
gen_ev);
tot_result = STATUS_FAILED;
} else {
printf("Check #2 PASSED: No JVMTI events were generated by the function PopFrame()\n");
}
return(tot_result);
}
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_popframe001(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_popframe001(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_popframe001(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;
res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
if (res != JNI_OK || jvmti == nullptr) {
printf("Wrong result of a valid call to GetEnv!\n");
return JNI_ERR;
}
err = jvmti->GetPotentialCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = jvmti->AddCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(AddCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = jvmti->GetCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(GetCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
if (!caps.can_pop_frame) {
printf("Warning: PopFrame is not implemented\n");
return JNI_OK;
}
if (!caps.can_suspend) {
printf("Warning: suspend/resume is not implemented\n");
return JNI_OK;
}
if (caps.can_generate_frame_pop_events &&
caps.can_generate_method_exit_events) {
callbacks.MethodExit = &MethodExit;
callbacks.FramePop = &FramePop;
err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
if (err != JVMTI_ERROR_NONE) {
printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
} else {
printf("Warning: FramePop or MethodExit event is not implemented\n");
}
err = jvmti->CreateRawMonitor("watch_ev_monitor", &watch_ev_monitor);
if (err != JVMTI_ERROR_NONE) {
printf("(CreateRawMonitor) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
return JNI_OK;
}
}
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