Quelle HeapDump.c Sprache: C

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* author Tomas Hurka
*/

#ifdef WIN32
#include <Windows.h>
#else
#define _GNU_SOURCE
#include <dlfcn.h>
#endif
#include <stdio.h>
#include "jni.h"
#include "jvmti.h"

#include "org_netbeans_lib_profiler_server_system_HeapDump.h"

jint (JNICALL *JVM_DumpHeap15)(JNIEnv* env, jstring outputfile, jboolean live);

/*
* Class:     org_netbeans_lib_profiler_server_system_HeapDump
* Method:    initialize15
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_org_netbeans_lib_profiler_server_system_HeapDump_initialize15
  (JNIEnv *env, jclass clz) {
#ifdef WIN32
  /* Get the address of JVM_DumpHeap function */
   HMODULE hModule = GetModuleHandle("jvm.dll");
  if (hModule == NULL) {
    fprintf(stderr, "Profiler Agent Error: Unable to get handle to jvm.dll\n");
    return ; /* Unable to get handle to jvm.dll */
  }
  JVM_DumpHeap15 = (jint (JNICALL *)(JNIEnv*,jstring,jboolean)) GetProcAddress(hModule, "JVM_DumpHeap");
  if (JVM_DumpHeap15 == NULL) {
    fprintf(stderr, "Profiler Agent Error: Unable to get address of JVM_DumpHeap function\n");
    return; /* Unable to get address of JVM_DumpHeap function */
  }
#else
  JVM_DumpHeap15 = (jint (JNICALL *)(JNIEnv*,jstring,jboolean)) dlsym(RTLD_DEFAULT, "JVM_DumpHeap");
  if (JVM_DumpHeap15 == NULL)  {
    //fprintf (stderr, "Profiler Agent: %s\n", dlerror());
    return;
  }
#endif

  //fprintf(stderr, "Profiler Agent: JVM_DumpHeap %p\n",JVM_DumpHeap15);
}

/*
* Class:     org_netbeans_lib_profiler_server_system_HeapDump
* Method:    takeHeapDump15Native
* Signature: (Ljava/lang/String;)I
*/
JNIEXPORT jint JNICALL Java_org_netbeans_lib_profiler_server_system_HeapDump_takeHeapDump15Native
(JNIEnv *env, jclass clz, jstring outputfile) {
  jint error = -1;

  if (JVM_DumpHeap15 != NULL) {
    fprintf(stdout,"Profiler Agent: Heap dump..");
    error = (*JVM_DumpHeap15)(env,outputfile,JNI_TRUE);
    fprintf(stdout," end, status %d\n",(int)error);
  }
  return error;
}

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