1 /*
   2  * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include <string.h>
  25 #include "jvmti.h"
  26 #include "agent_common.h"
  27 #include "jni_tools.h"
  28 #include "jvmti_tools.h"
  29 
  30 extern "C" {
  31 
  32 /* ============================================================================= */
  33 
  34 /* scaffold objects */
  35 static jlong timeout = 0;
  36 
  37 /* constant names */
  38 #define THREAD_NAME     "TestedThread"
  39 
  40 /* ============================================================================= */
  41 
  42 /** Agent algorithm. */
  43 static void JNICALL
  44 agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
  45 
  46     NSK_DISPLAY0("Wait for thread to start\n");
  47     if (!nsk_jvmti_waitForSync(timeout))
  48         return;
  49 
  50     /* perform testing */
  51     {
  52         jthread testedThread = NULL;
  53 
  54         NSK_DISPLAY1("Find thread: %s\n", THREAD_NAME);
  55         if (!NSK_VERIFY((testedThread =
  56                 nsk_jvmti_threadByName(THREAD_NAME)) != NULL))
  57             return;
  58         NSK_DISPLAY1("  ... found thread: %p\n", (void*)testedThread);
  59 
  60         NSK_DISPLAY1("Suspend thread: %p\n", (void*)testedThread);
  61         if (!NSK_JVMTI_VERIFY(
  62                 NSK_CPP_STUB2(SuspendThread, jvmti, testedThread))) {
  63             nsk_jvmti_setFailStatus();
  64             return;
  65         }
  66 
  67         NSK_DISPLAY0("Let thread to run and finish\n");
  68         if (!nsk_jvmti_resumeSync())
  69             return;
  70 
  71         NSK_DISPLAY1("Get state vector for thread: %p\n", (void*)testedThread);
  72         {
  73             jint state = 0;
  74 
  75             if (!NSK_JVMTI_VERIFY(
  76                     NSK_CPP_STUB3(GetThreadState, jvmti, testedThread, &state))) {
  77                 nsk_jvmti_setFailStatus();
  78             }
  79             NSK_DISPLAY2("  ... got state vector: %s (%d)\n",
  80                             TranslateState(state), (int)state);
  81 
  82             if ((state & JVMTI_THREAD_STATE_SUSPENDED) == 0) {
  83                 NSK_COMPLAIN2("SuspendThread() does not turn on flag SUSPENDED:\n"
  84                               "#   state: %s (%d)\n",
  85                               TranslateState(state), (int)state);
  86                 nsk_jvmti_setFailStatus();
  87             }
  88         }
  89 
  90         NSK_DISPLAY1("Resume thread: %p\n", (void*)testedThread);
  91         if (!NSK_JVMTI_VERIFY(
  92                 NSK_CPP_STUB2(ResumeThread, jvmti, testedThread))) {
  93             nsk_jvmti_setFailStatus();
  94         }
  95 
  96         NSK_DISPLAY0("Wait for thread to finish\n");
  97         if (!nsk_jvmti_waitForSync(timeout))
  98             return;
  99 
 100         NSK_DISPLAY0("Delete thread reference\n");
 101         NSK_TRACE(NSK_CPP_STUB2(DeleteGlobalRef, jni, testedThread));
 102     }
 103 
 104     NSK_DISPLAY0("Let debugee to finish\n");
 105     if (!nsk_jvmti_resumeSync())
 106         return;
 107 }
 108 
 109 /* ============================================================================= */
 110 
 111 /** Agent library initialization. */
 112 #ifdef STATIC_BUILD
 113 JNIEXPORT jint JNICALL Agent_OnLoad_suspendthrd001(JavaVM *jvm, char *options, void *reserved) {
 114     return Agent_Initialize(jvm, options, reserved);
 115 }
 116 JNIEXPORT jint JNICALL Agent_OnAttach_suspendthrd001(JavaVM *jvm, char *options, void *reserved) {
 117     return Agent_Initialize(jvm, options, reserved);
 118 }
 119 JNIEXPORT jint JNI_OnLoad_suspendthrd001(JavaVM *jvm, char *options, void *reserved) {
 120     return JNI_VERSION_1_8;
 121 }
 122 #endif
 123 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
 124     jvmtiEnv* jvmti = NULL;
 125 
 126     /* init framework and parse options */
 127     if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
 128         return JNI_ERR;
 129 
 130     timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
 131 
 132     /* create JVMTI environment */
 133     if (!NSK_VERIFY((jvmti =
 134             nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
 135         return JNI_ERR;
 136 
 137     /* add specific capabilities for suspending thread */
 138     {
 139         jvmtiCapabilities suspendCaps;
 140         memset(&suspendCaps, 0, sizeof(suspendCaps));
 141         suspendCaps.can_suspend = 1;
 142         if (!NSK_JVMTI_VERIFY(
 143                 NSK_CPP_STUB2(AddCapabilities, jvmti, &suspendCaps)))
 144             return JNI_ERR;
 145     }
 146 
 147     /* register agent proc and arg */
 148     if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
 149         return JNI_ERR;
 150 
 151     return JNI_OK;
 152 }
 153 
 154 /* ============================================================================= */
 155 
 156 }