1 /*
2 * Copyright (C) 2012 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 "entrypoints/entrypoint_utils.h"
18 #include "mirror/art_method-inl.h"
19 #include "mirror/object-inl.h"
20 #include "thread-inl.h"
21
22 namespace art {
23
24 // Called on entry to JNI, transition out of Runnable and release share of mutator_lock_.
art_portable_jni_method_start(Thread * self)25 extern "C" uint32_t art_portable_jni_method_start(Thread* self)
26 UNLOCK_FUNCTION(GlobalSynchronizatio::mutator_lock_) {
27 JNIEnvExt* env = self->GetJniEnv();
28 uint32_t saved_local_ref_cookie = env->local_ref_cookie;
29 env->local_ref_cookie = env->locals.GetSegmentState();
30 self->TransitionFromRunnableToSuspended(kNative);
31 return saved_local_ref_cookie;
32 }
33
art_portable_jni_method_start_synchronized(jobject to_lock,Thread * self)34 extern "C" uint32_t art_portable_jni_method_start_synchronized(jobject to_lock, Thread* self)
35 UNLOCK_FUNCTION(Locks::mutator_lock_) {
36 self->DecodeJObject(to_lock)->MonitorEnter(self);
37 return art_portable_jni_method_start(self);
38 }
39
PopLocalReferences(uint32_t saved_local_ref_cookie,Thread * self)40 static void PopLocalReferences(uint32_t saved_local_ref_cookie, Thread* self) {
41 JNIEnvExt* env = self->GetJniEnv();
42 env->locals.SetSegmentState(env->local_ref_cookie);
43 env->local_ref_cookie = saved_local_ref_cookie;
44 }
45
art_portable_jni_method_end(uint32_t saved_local_ref_cookie,Thread * self)46 extern "C" void art_portable_jni_method_end(uint32_t saved_local_ref_cookie, Thread* self)
47 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) {
48 self->TransitionFromSuspendedToRunnable();
49 PopLocalReferences(saved_local_ref_cookie, self);
50 }
51
52
art_portable_jni_method_end_synchronized(uint32_t saved_local_ref_cookie,jobject locked,Thread * self)53 extern "C" void art_portable_jni_method_end_synchronized(uint32_t saved_local_ref_cookie,
54 jobject locked,
55 Thread* self)
56 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) {
57 self->TransitionFromSuspendedToRunnable();
58 UnlockJniSynchronizedMethod(locked, self); // Must decode before pop.
59 PopLocalReferences(saved_local_ref_cookie, self);
60 }
61
art_portable_jni_method_end_with_reference(jobject result,uint32_t saved_local_ref_cookie,Thread * self)62 extern "C" mirror::Object* art_portable_jni_method_end_with_reference(jobject result,
63 uint32_t saved_local_ref_cookie,
64 Thread* self)
65 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) {
66 self->TransitionFromSuspendedToRunnable();
67 mirror::Object* o = self->DecodeJObject(result); // Must decode before pop.
68 PopLocalReferences(saved_local_ref_cookie, self);
69 // Process result.
70 if (UNLIKELY(self->GetJniEnv()->check_jni)) {
71 if (self->IsExceptionPending()) {
72 return NULL;
73 }
74 CheckReferenceResult(o, self);
75 }
76 return o;
77 }
78
art_portable_jni_method_end_with_reference_synchronized(jobject result,uint32_t saved_local_ref_cookie,jobject locked,Thread * self)79 extern "C" mirror::Object* art_portable_jni_method_end_with_reference_synchronized(jobject result,
80 uint32_t saved_local_ref_cookie,
81 jobject locked,
82 Thread* self)
83 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) {
84 self->TransitionFromSuspendedToRunnable();
85 UnlockJniSynchronizedMethod(locked, self); // Must decode before pop.
86 mirror::Object* o = self->DecodeJObject(result);
87 PopLocalReferences(saved_local_ref_cookie, self);
88 // Process result.
89 if (UNLIKELY(self->GetJniEnv()->check_jni)) {
90 if (self->IsExceptionPending()) {
91 return NULL;
92 }
93 CheckReferenceResult(o, self);
94 }
95 return o;
96 }
97
98 } // namespace art
99