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/*
* 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 <string.h>
#include "jvmti.h"
#include "agent_common.h"
#include "jni_tools.h"
#include "jvmti_tools.h"
extern "C" {
/* ============================================================================= */
/* scaffold objects */
static jlong timeout = 0;
/* constant names */
#define THREAD_NAME "TestedThread"
#define N_LATE_CALLS 10000
/* ============================================================================= */
/** Agent algorithm. */
static void JNICALL
agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
/* Original agentProc test block starts here: */
NSK_DISPLAY0("Wait for thread to start\n");
// SP2.1-n - notify agent is waiting and wait
// SP3.1-w - wait to start test
if (!nsk_jvmti_waitForSync(timeout))
return;
/* perform testing */
{
jthread testedThread = NULL;
int late_count;
NSK_DISPLAY1("Find thread: %s\n", THREAD_NAME);
if (!NSK_VERIFY((testedThread =
nsk_jvmti_threadByName(THREAD_NAME)) != NULL))
return;
NSK_DISPLAY1(" ... found thread: %p\n", (void*)testedThread);
NSK_DISPLAY1("Suspend thread: %p\n", (void*)testedThread);
if (!NSK_JVMTI_VERIFY(jvmti->SuspendThread(testedThread))) {
nsk_jvmti_setFailStatus();
return;
}
NSK_DISPLAY0("Let thread to run and finish\n");
// SP5.1-n - notify suspend done
if (!nsk_jvmti_resumeSync())
return;
NSK_DISPLAY1("Get state vector for thread: %p\n", (void*)testedThread);
{
jint state = 0;
if (!NSK_JVMTI_VERIFY(jvmti->GetThreadState(testedThread, &state))) {
nsk_jvmti_setFailStatus();
}
NSK_DISPLAY2(" ... got state vector: %s (%d)\n",
TranslateState(state), (int)state);
if ((state & JVMTI_THREAD_STATE_SUSPENDED) == 0) {
NSK_COMPLAIN2("SuspendThread() does not turn on flag SUSPENDED:\n"
"# state: %s (%d)\n",
TranslateState(state), (int)state);
nsk_jvmti_setFailStatus();
}
}
NSK_DISPLAY1("Resume thread: %p\n", (void*)testedThread);
if (!NSK_JVMTI_VERIFY(jvmti->ResumeThread(testedThread))) {
nsk_jvmti_setFailStatus();
}
/* Original agentProc test block ends here. */
/*
* Using printf() instead of NSK_DISPLAY1() in this loop
* in order to slow down the rate of SuspendThread() calls.
*/
for (late_count = 0; late_count < N_LATE_CALLS; late_count++) {
jvmtiError l_err;
printf("INFO: Late suspend thread: %p\n", (void*)testedThread);
l_err = jvmti->SuspendThread(testedThread);
if (l_err != JVMTI_ERROR_NONE) {
printf("INFO: Late suspend thread err: %d\n", l_err);
// testedThread has exited so we're done with late calls
break;
}
// Only resume a thread if suspend worked. Using NSK_DISPLAY1()
// here because we want ResumeThread() to be faster.
NSK_DISPLAY1("INFO: Late resume thread: %p\n", (void*)testedThread);
if (!NSK_JVMTI_VERIFY(jvmti->ResumeThread(testedThread))) {
nsk_jvmti_setFailStatus();
}
}
printf("INFO: made %d late calls to JVM/TI SuspendThread()\n",
late_count);
printf("INFO: N_LATE_CALLS==%d value is %slarge enough to cause a "
"SuspendThread() call after thread exit.\n", N_LATE_CALLS,
(late_count == N_LATE_CALLS) ? "NOT " : "");
/* Second part of original agentProc test block starts here: */
NSK_DISPLAY0("Wait for thread to finish\n");
// SP4.1-n - notify agent is waiting and wait
// SP6.1-w - wait to end test
if (!nsk_jvmti_waitForSync(timeout))
return;
NSK_DISPLAY0("Delete thread reference\n");
NSK_TRACE(jni->DeleteGlobalRef(testedThread));
}
NSK_DISPLAY0("Let debugee to finish\n");
// SP7.1-n - notify agent end
if (!nsk_jvmti_resumeSync())
return;
/* Second part of original agentProc test block ends here. */
}
/* ============================================================================= */
/** Agent library initialization. */
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_suspendthrd003(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_suspendthrd003(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_suspendthrd003(JavaVM *jvm, char *options, void *reserved) {
return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
jvmtiEnv* jvmti = NULL;
/* init framework and parse options */
if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
return JNI_ERR;
timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
/* create JVMTI environment */
if (!NSK_VERIFY((jvmti =
nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
return JNI_ERR;
/* add specific capabilities for suspending thread */
{
jvmtiCapabilities suspendCaps;
memset(&suspendCaps, 0, sizeof(suspendCaps));
suspendCaps.can_suspend = 1;
if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&suspendCaps)))
return JNI_ERR;
}
/* register agent proc and arg */
if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
return JNI_ERR;
return JNI_OK;
}
/* ============================================================================= */
}
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