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-inl.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(Locks::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_) NO_THREAD_SAFETY_ANALYSIS {
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 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
42 JNIEnvExt* env = self->GetJniEnv();
43 env->locals.SetSegmentState(env->local_ref_cookie);
44 env->local_ref_cookie = saved_local_ref_cookie;
45 }
46
art_portable_jni_method_end(uint32_t saved_local_ref_cookie,Thread * self)47 extern "C" void art_portable_jni_method_end(uint32_t saved_local_ref_cookie, Thread* self)
48 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) {
49 self->TransitionFromSuspendedToRunnable();
50 PopLocalReferences(saved_local_ref_cookie, self);
51 }
52
53
art_portable_jni_method_end_synchronized(uint32_t saved_local_ref_cookie,jobject locked,Thread * self)54 extern "C" void art_portable_jni_method_end_synchronized(uint32_t saved_local_ref_cookie,
55 jobject locked,
56 Thread* self)
57 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) {
58 self->TransitionFromSuspendedToRunnable();
59 UnlockJniSynchronizedMethod(locked, self); // Must decode before pop.
60 PopLocalReferences(saved_local_ref_cookie, self);
61 }
62
art_portable_jni_method_end_with_reference(jobject result,uint32_t saved_local_ref_cookie,Thread * self)63 extern "C" mirror::Object* art_portable_jni_method_end_with_reference(jobject result,
64 uint32_t saved_local_ref_cookie,
65 Thread* self)
66 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) {
67 self->TransitionFromSuspendedToRunnable();
68 mirror::Object* o = self->DecodeJObject(result); // Must decode before pop.
69 PopLocalReferences(saved_local_ref_cookie, self);
70 // Process result.
71 if (UNLIKELY(self->GetJniEnv()->check_jni)) {
72 if (self->IsExceptionPending()) {
73 return NULL;
74 }
75 CheckReferenceResult(o, self);
76 }
77 return o;
78 }
79
art_portable_jni_method_end_with_reference_synchronized(jobject result,uint32_t saved_local_ref_cookie,jobject locked,Thread * self)80 extern "C" mirror::Object* art_portable_jni_method_end_with_reference_synchronized(jobject result,
81 uint32_t saved_local_ref_cookie,
82 jobject locked,
83 Thread* self)
84 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) {
85 self->TransitionFromSuspendedToRunnable();
86 UnlockJniSynchronizedMethod(locked, self); // Must decode before pop.
87 mirror::Object* o = self->DecodeJObject(result);
88 PopLocalReferences(saved_local_ref_cookie, self);
89 // Process result.
90 if (UNLIKELY(self->GetJniEnv()->check_jni)) {
91 if (self->IsExceptionPending()) {
92 return NULL;
93 }
94 CheckReferenceResult(o, self);
95 }
96 return o;
97 }
98
99 } // namespace art
100