/*
* Copyright (c) 2003, 2022, 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 <stdlib.h>
#include <string.h>
#include "jvmti.h"
#include "agent_common.h"
#include "JVMTITools.h"
extern "C" {
#define PASSED 0
#define STATUS_FAILED 2
typedef struct {
int cnt;
const char **thrNames;
} info;
typedef struct {
info expected;
info unexpected;
} threadInfo;
static jvmtiEnv *jvmti;
static jrawMonitorID lock1;
static jrawMonitorID lock2;
static jboolean printdump = JNI_FALSE;
static jint result = PASSED;
static const char main_name[] = "main";
static const char thread1_name[] = "thread1";
static const char sys_thread_name[] = "SysThread";
static const char *main_only[] = { main_name };
static const char *thr1_only[] = { thread1_name };
static const char *sys_only[] = { sys_thread_name };
static const char *main_thr1[] = { main_name, thread1_name };
static const char *main_sys[] = { main_name, sys_thread_name };
static const char *thr1_sys[] = { thread1_name, sys_thread_name };
static threadInfo thrInfo[] = {
{{1, main_only}, {2, thr1_sys}},
{{1, main_only}, {2, thr1_sys}},
{{2, main_thr1}, {1, sys_only}},
{{1, main_only}, {2, thr1_sys}},
{{2, main_sys}, {1, thr1_only}}
};
jthread jthr(JNIEnv *env) {
jclass thrClass;
jmethodID cid;
jthread res;
thrClass = env->FindClass("java/lang/Thread");
cid = env->GetMethodID(thrClass, "<init>", "(Ljava/lang/String;)V");
jstring thread_name = env->NewStringUTF(sys_thread_name);
res = env->NewObject(thrClass, cid, thread_name);
env->DeleteLocalRef(thread_name);
return res;
}
static void JNICALL
sys_thread(jvmtiEnv* jvmti, JNIEnv* jni, void *p) {
jvmtiError err;
err = jvmti->RawMonitorEnter(lock2);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to enter raw monitor 2 (thread): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
/* allows the main thread to wait until the child thread is running */
err = jvmti->RawMonitorEnter(lock1);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to enter raw monitor 1 (thread): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RawMonitorNotify(lock1);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to notify raw monitor (thread): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RawMonitorExit(lock1);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to exit raw monitor 1 (thread): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
/* keeps the child thread from exiting */
err = jvmti->RawMonitorWait(lock2, (jlong)0);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to wait raw monitor (thread): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RawMonitorExit(lock2);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to exit raw monitor 2 (thread): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
}
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_allthr001(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_allthr001(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_allthr001(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;
}
res = jvm->GetEnv((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->CreateRawMonitor("_lock1", &lock1);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to create raw monitor 1, err = %d\n", err);
return JNI_ERR;
}
err = jvmti->CreateRawMonitor("_lock2", &lock2);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to create raw monitor 2, err = %d\n", err);
return JNI_ERR;
}
return JNI_OK;
}
void releaseThreadInfo(JNIEnv *env, jvmtiThreadInfo *info) {
jvmti->Deallocate((unsigned char *)info->name);
if (info->thread_group != NULL) {
env->DeleteLocalRef(info->thread_group);
}
if (info->context_class_loader != NULL) {
env->DeleteLocalRef(info->context_class_loader);
}
}
JNIEXPORT void checkInfo(JNIEnv *env, int ind) {
jint threadsCount = -1;
jthread *threads;
jvmtiError err;
int expected = 0;
jvmtiThreadInfo inf;
if (printdump == JNI_TRUE) {
printf(" >>> Check: %d\n", ind);
}
if (ind == 4) {
err = jvmti->RawMonitorEnter(lock1);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to enter raw monitor (check): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RunAgentThread(jthr(env), sys_thread, NULL,
JVMTI_THREAD_NORM_PRIORITY);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to start agent thread: %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RawMonitorWait(lock1, (jlong)0);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to wait raw monitor (check): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RawMonitorExit(lock1);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to exit raw monitor (check): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
}
err = jvmti->GetAllThreads(&threadsCount, &threads);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to get all threads (check): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
return;
}
// check unexpected threads
for (int i = 0; i < threadsCount; i++) {
err = jvmti->GetThreadInfo(threads[i], &inf);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to get thread info: %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
return;
}
if (printdump == JNI_TRUE) {
printf(" >>> %s", inf.name);
}
bool found = false;
for (int j = 0; j < thrInfo[ind].unexpected.cnt && !found; j++) {
found = (inf.name != NULL && strcmp(inf.name, thrInfo[ind].unexpected.thrNames[j]) == 0);
}
if (found) {
printf("Point %d: detected unexpected thread %s\n", ind, inf.name);
result = STATUS_FAILED;
}
releaseThreadInfo(env, &inf);
}
if (printdump == JNI_TRUE) {
printf("\n");
}
// verify all expected threads are present
for (int i = 0; i < thrInfo[ind].expected.cnt; i++) {
bool found = false;
for (int j = 0; j < threadsCount && !found; j++) {
err = jvmti->GetThreadInfo(threads[j], &inf);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to get thread info: %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
return;
}
found = (inf.name != NULL && strcmp(inf.name, thrInfo[ind].expected.thrNames[j]) == 0);
releaseThreadInfo(env, &inf);
}
if (!found) {
printf("Point %d: thread %s not detected\n",
ind, thrInfo[ind].expected.thrNames[i]);
result = STATUS_FAILED;
}
}
err = jvmti->Deallocate((unsigned char *)threads);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to deallocate array: %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
if (ind == 4) {
err = jvmti->RawMonitorEnter(lock2);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to enter raw monitor (check): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RawMonitorNotify(lock2);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to notify raw monitor (check): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RawMonitorExit(lock2);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to exit raw monitor (check): %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
}
}
JNIEXPORT void JNICALL
Java_nsk_jvmti_GetAllThreads_allthr001_checkInfo(JNIEnv *env, jclass cls, jint ind) {
checkInfo(env, ind);
}
JNIEXPORT jint JNICALL Java_nsk_jvmti_GetAllThreads_allthr001_getRes(JNIEnv *env, jclass cls) {
return result;
}
}