gc_callbacks.cc revision 4934eb1845a2b2535ebe086e906b45535a695a13 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdio.h>
18#include <string.h>
19
20#include "base/macros.h"
21#include "jni.h"
22#include "openjdkjvmti/jvmti.h"
23#include "ti-agent/common_helper.h"
24#include "ti-agent/common_load.h"
25
26namespace art {
27namespace Test908GcStartFinish {
28
29static size_t starts = 0;
30static size_t finishes = 0;
31
32static void JNICALL GarbageCollectionFinish(jvmtiEnv* ti_env ATTRIBUTE_UNUSED) {
33  finishes++;
34}
35
36static void JNICALL GarbageCollectionStart(jvmtiEnv* ti_env ATTRIBUTE_UNUSED) {
37  starts++;
38}
39
40extern "C" JNIEXPORT void JNICALL Java_Main_setupGcCallback(
41    JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
42  jvmtiEventCallbacks callbacks;
43  memset(&callbacks, 0, sizeof(jvmtiEventCallbacks));
44  callbacks.GarbageCollectionFinish = GarbageCollectionFinish;
45  callbacks.GarbageCollectionStart = GarbageCollectionStart;
46
47  jvmtiError ret = jvmti_env->SetEventCallbacks(&callbacks, sizeof(callbacks));
48  JvmtiErrorToException(env, ret);
49}
50
51extern "C" JNIEXPORT void JNICALL Java_Main_enableGcTracking(JNIEnv* env,
52                                                             jclass klass ATTRIBUTE_UNUSED,
53                                                             jboolean enable) {
54  jvmtiError ret = jvmti_env->SetEventNotificationMode(
55      enable ? JVMTI_ENABLE : JVMTI_DISABLE,
56      JVMTI_EVENT_GARBAGE_COLLECTION_START,
57      nullptr);
58  if (JvmtiErrorToException(env, ret)) {
59    return;
60  }
61  ret = jvmti_env->SetEventNotificationMode(
62      enable ? JVMTI_ENABLE : JVMTI_DISABLE,
63      JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
64      nullptr);
65  if (JvmtiErrorToException(env, ret)) {
66    return;
67  }
68}
69
70extern "C" JNIEXPORT jint JNICALL Java_Main_getGcStarts(JNIEnv* env ATTRIBUTE_UNUSED,
71                                                        jclass klass ATTRIBUTE_UNUSED) {
72  jint result = static_cast<jint>(starts);
73  starts = 0;
74  return result;
75}
76
77extern "C" JNIEXPORT jint JNICALL Java_Main_getGcFinishes(JNIEnv* env ATTRIBUTE_UNUSED,
78                                                          jclass klass ATTRIBUTE_UNUSED) {
79  jint result = static_cast<jint>(finishes);
80  finishes = 0;
81  return result;
82}
83
84}  // namespace Test908GcStartFinish
85}  // namespace art
86