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 for (jsize i = 0; i < len; i++) {
41 ret.push_back(reinterpret_cast<jthread>(env->GetObjectArrayElement(thrs, i)));
42 }
43 return ret;
44 }
45
Java_art_Suspension_resumeList(JNIEnv * env,jclass,jobjectArray thr)46 extern "C" JNIEXPORT jintArray JNICALL Java_art_Suspension_resumeList(JNIEnv* env,
47 jclass,
48 jobjectArray thr) {
49 static_assert(sizeof(jvmtiError) == sizeof(jint), "cannot use jintArray as jvmtiError array");
50 std::vector<jthread> threads(CopyToVector(env, thr));
51 if (env->ExceptionCheck()) {
52 return nullptr;
53 }
54 jintArray ret = env->NewIntArray(threads.size());
55 if (env->ExceptionCheck()) {
56 return nullptr;
57 }
58 jint* elems = env->GetIntArrayElements(ret, nullptr);
59 JvmtiErrorToException(env, jvmti_env,
60 jvmti_env->ResumeThreadList(threads.size(),
61 threads.data(),
62 reinterpret_cast<jvmtiError*>(elems)));
63 env->ReleaseIntArrayElements(ret, elems, 0);
64 return ret;
65 }
66
Java_art_Suspension_suspendList(JNIEnv * env,jclass,jobjectArray thrs)67 extern "C" JNIEXPORT jintArray JNICALL Java_art_Suspension_suspendList(JNIEnv* env,
68 jclass,
69 jobjectArray thrs) {
70 static_assert(sizeof(jvmtiError) == sizeof(jint), "cannot use jintArray as jvmtiError array");
71 std::vector<jthread> threads(CopyToVector(env, thrs));
72 if (env->ExceptionCheck()) {
73 return nullptr;
74 }
75 jintArray ret = env->NewIntArray(threads.size());
76 if (env->ExceptionCheck()) {
77 return nullptr;
78 }
79 jint* elems = env->GetIntArrayElements(ret, nullptr);
80 JvmtiErrorToException(env, jvmti_env,
81 jvmti_env->SuspendThreadList(threads.size(),
82 threads.data(),
83 reinterpret_cast<jvmtiError*>(elems)));
84 env->ReleaseIntArrayElements(ret, elems, 0);
85 return ret;
86 }
87
Java_art_Suspension_resume(JNIEnv * env,jclass,jthread thr)88 extern "C" JNIEXPORT void JNICALL Java_art_Suspension_resume(JNIEnv* env, jclass, jthread thr) {
89 JvmtiErrorToException(env, jvmti_env, jvmti_env->ResumeThread(thr));
90 }
91
Java_art_Suspension_suspend(JNIEnv * env,jclass,jthread thr)92 extern "C" JNIEXPORT void JNICALL Java_art_Suspension_suspend(JNIEnv* env, jclass, jthread thr) {
93 JvmtiErrorToException(env, jvmti_env, jvmti_env->SuspendThread(thr));
94 }
95
96 } // namespace common_suspension
97 } // namespace art
98
99