1 /*
   2  * Copyright (c) 2008, 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 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <errno.h>
  27 #include "jvmti_tools.h"
  28 #include "agent_common.h"
  29 
  30 #define PASSED 0
  31 #define STATUS_FAILED 2
  32 
  33 extern "C" {
  34 
  35 static jvmtiEnv* gJvmti = NULL;
  36 static volatile jboolean gGotEvent = JNI_FALSE;
  37 
  38 void JNICALL
  39 resourceExhausted(jvmtiEnv *jvmti_env,
  40                   JNIEnv* jni_env,
  41                   jint flags,
  42                   const void* reserved,
  43                   const char* description)
  44 {
  45     NSK_DISPLAY1("Agent: ResourceExhausted detected: %s\n", description);
  46     if (flags & JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR) NSK_DISPLAY0("Agent:    JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR\n");
  47     if (flags & JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP) NSK_DISPLAY0("Agent:    JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP\n");
  48     if (flags & JVMTI_RESOURCE_EXHAUSTED_THREADS)   NSK_DISPLAY0("Agent:    JVMTI_RESOURCE_EXHAUSTED_THREADS\n");
  49     gGotEvent = JNI_TRUE;
  50 }
  51 
  52 JNIEXPORT jboolean JNICALL
  53 Java_nsk_jvmti_ResourceExhausted_Helper_gotExhaustedEvent(JNIEnv* env, jclass cls)
  54 {
  55     return gGotEvent;
  56 }
  57 
  58 JNIEXPORT void JNICALL
  59 Java_nsk_jvmti_ResourceExhausted_Helper_resetExhaustedEvent(JNIEnv* env, jclass cls)
  60 {
  61     gGotEvent = JNI_FALSE;
  62 }
  63 
  64 #ifdef STATIC_BUILD
  65 JNIEXPORT jint JNICALL Agent_OnLoad_resexhausted(JavaVM *jvm, char *options, void *reserved) {
  66     return Agent_Initialize(jvm, options, reserved);
  67 }
  68 JNIEXPORT jint JNICALL Agent_OnAttach_resexhausted(JavaVM *jvm, char *options, void *reserved) {
  69     return Agent_Initialize(jvm, options, reserved);
  70 }
  71 JNIEXPORT jint JNI_OnLoad_resexhausted(JavaVM *jvm, char *options, void *reserved) {
  72     return JNI_VERSION_1_8;
  73 }
  74 #endif
  75 jint Agent_Initialize(JavaVM *vm, char *options, void *reserved)
  76 {
  77     jvmtiEventCallbacks callbacks;
  78     jvmtiCapabilities capabilities;
  79 
  80     if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
  81         return JNI_ERR;
  82 
  83     if (!NSK_VERIFY((gJvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL))
  84         return JNI_ERR;
  85 
  86     memset(&capabilities, 0, sizeof(jvmtiCapabilities));
  87     capabilities.can_generate_resource_exhaustion_heap_events = 1;
  88     capabilities.can_generate_resource_exhaustion_threads_events = 1;
  89     if (!NSK_JVMTI_VERIFY(gJvmti->AddCapabilities(&capabilities)))
  90         return JNI_ERR;
  91 
  92     memset((void *)&callbacks, 0, sizeof(jvmtiEventCallbacks));
  93     callbacks.ResourceExhausted = resourceExhausted;
  94     if (!NSK_JVMTI_VERIFY(gJvmti->SetEventCallbacks(&callbacks, sizeof(callbacks))))
  95         return JNI_ERR;
  96 
  97     if (!NSK_JVMTI_VERIFY(gJvmti->SetEventNotificationMode(JVMTI_ENABLE,
  98                                                            JVMTI_EVENT_RESOURCE_EXHAUSTED,
  99                                                            NULL)))
 100         return JNI_ERR;
 101 
 102     return JNI_OK;
 103 }
 104 
 105 }