1 /*
2 * Copyright (C) 2017 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 "jni.h"
18 #include "jvmti.h"
19
20 #include <vector>
21
22 #include "jvmti_helper.h"
23 #include "test_env.h"
24
25 namespace art {
26 namespace common_suspension {
27
Java_art_Suspension_isSuspended(JNIEnv * env,jclass,jthread thr)28 extern "C" JNIEXPORT jboolean JNICALL Java_art_Suspension_isSuspended(
29 JNIEnv* env, jclass, jthread thr) {
30 jint state;
31 if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetThreadState(thr, &state))) {
32 return false;
33 }
34 return (state & JVMTI_THREAD_STATE_SUSPENDED) != 0;
35 }
36
CopyToVector(JNIEnv * env,jobjectArray thrs)37 static std::vector<jthread> CopyToVector(JNIEnv* env, jobjectArray thrs) {
38 jsize len = env->GetArrayLength(thrs);
39 std::vector<jthread> ret;
40 ret.reserve(len);
41 for (jsize i = 0; i < len; i++) {
42 ret.push_back(reinterpret_cast<jthread>(env->GetObjectArrayElement(thrs, i)));
43 }
44 return ret;
45 }
46
Java_art_Suspension_resumeList(JNIEnv * env,jclass,jobjectArray thr)47 extern "C" JNIEXPORT jintArray JNICALL Java_art_Suspension_resumeList(JNIEnv* env,
48 jclass,
49 jobjectArray thr) {
50 static_assert(sizeof(jvmtiError) == sizeof(jint), "cannot use jintArray as jvmtiError array");
51 std::vector<jthread> threads(CopyToVector(env, thr));
52 if (env->ExceptionCheck()) {
53 return nullptr;
54 }
55 jintArray ret = env->NewIntArray(threads.size());
56 if (env->ExceptionCheck()) {
57 return nullptr;
58 }
59 jint* elems = env->GetIntArrayElements(ret, nullptr);
60 JvmtiErrorToException(env, jvmti_env,
61 jvmti_env->ResumeThreadList(threads.size(),
62 threads.data(),
63 reinterpret_cast<jvmtiError*>(elems)));
64 env->ReleaseIntArrayElements(ret, elems, 0);
65 return ret;
66 }
67
Java_art_Suspension_suspendList(JNIEnv * env,jclass,jobjectArray thrs)68 extern "C" JNIEXPORT jintArray JNICALL Java_art_Suspension_suspendList(JNIEnv* env,
69 jclass,
70 jobjectArray thrs) {
71 static_assert(sizeof(jvmtiError) == sizeof(jint), "cannot use jintArray as jvmtiError array");
72 std::vector<jthread> threads(CopyToVector(env, thrs));
73 if (env->ExceptionCheck()) {
74 return nullptr;
75 }
76 jintArray ret = env->NewIntArray(threads.size());
77 if (env->ExceptionCheck()) {
78 return nullptr;
79 }
80 jint* elems = env->GetIntArrayElements(ret, nullptr);
81 JvmtiErrorToException(env, jvmti_env,
82 jvmti_env->SuspendThreadList(threads.size(),
83 threads.data(),
84 reinterpret_cast<jvmtiError*>(elems)));
85 env->ReleaseIntArrayElements(ret, elems, 0);
86 return ret;
87 }
88
Java_art_Suspension_resume(JNIEnv * env,jclass,jthread thr)89 extern "C" JNIEXPORT void JNICALL Java_art_Suspension_resume(JNIEnv* env, jclass, jthread thr) {
90 JvmtiErrorToException(env, jvmti_env, jvmti_env->ResumeThread(thr));
91 }
92
Java_art_Suspension_suspend(JNIEnv * env,jclass,jthread thr)93 extern "C" JNIEXPORT void JNICALL Java_art_Suspension_suspend(JNIEnv* env, jclass, jthread thr) {
94 JvmtiErrorToException(env, jvmti_env, jvmti_env->SuspendThread(thr));
95 }
96
97 } // namespace common_suspension
98 } // namespace art
99
100