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 "dex_file-inl.h"
18 #include "entrypoints/entrypoint_utils.h"
19 #include "mirror/art_method-inl.h"
20 #include "mirror/class-inl.h"
21 #include "mirror/object.h"
22 #include "mirror/object-inl.h"
23 #include "mirror/object_array-inl.h"
24 #include "object_utils.h"
25 #include "scoped_thread_state_change.h"
26 #include "thread.h"
27
28 namespace art {
29
30 // Called on entry to JNI, transition out of Runnable and release share of mutator_lock_.
JniMethodStart(Thread * self)31 extern uint32_t JniMethodStart(Thread* self) {
32 JNIEnvExt* env = self->GetJniEnv();
33 DCHECK(env != NULL);
34 uint32_t saved_local_ref_cookie = env->local_ref_cookie;
35 env->local_ref_cookie = env->locals.GetSegmentState();
36 self->TransitionFromRunnableToSuspended(kNative);
37 return saved_local_ref_cookie;
38 }
39
JniMethodStartSynchronized(jobject to_lock,Thread * self)40 extern uint32_t JniMethodStartSynchronized(jobject to_lock, Thread* self) {
41 self->DecodeJObject(to_lock)->MonitorEnter(self);
42 return JniMethodStart(self);
43 }
44
PopLocalReferences(uint32_t saved_local_ref_cookie,Thread * self)45 static void PopLocalReferences(uint32_t saved_local_ref_cookie, Thread* self) {
46 JNIEnvExt* env = self->GetJniEnv();
47 env->locals.SetSegmentState(env->local_ref_cookie);
48 env->local_ref_cookie = saved_local_ref_cookie;
49 self->PopSirt();
50 }
51
JniMethodEnd(uint32_t saved_local_ref_cookie,Thread * self)52 extern void JniMethodEnd(uint32_t saved_local_ref_cookie, Thread* self) {
53 self->TransitionFromSuspendedToRunnable();
54 PopLocalReferences(saved_local_ref_cookie, self);
55 }
56
57
JniMethodEndSynchronized(uint32_t saved_local_ref_cookie,jobject locked,Thread * self)58 extern void JniMethodEndSynchronized(uint32_t saved_local_ref_cookie, jobject locked,
59 Thread* self) {
60 self->TransitionFromSuspendedToRunnable();
61 UnlockJniSynchronizedMethod(locked, self); // Must decode before pop.
62 PopLocalReferences(saved_local_ref_cookie, self);
63 }
64
JniMethodEndWithReference(jobject result,uint32_t saved_local_ref_cookie,Thread * self)65 extern mirror::Object* JniMethodEndWithReference(jobject result, uint32_t saved_local_ref_cookie,
66 Thread* self) {
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
JniMethodEndWithReferenceSynchronized(jobject result,uint32_t saved_local_ref_cookie,jobject locked,Thread * self)80 extern mirror::Object* JniMethodEndWithReferenceSynchronized(jobject result,
81 uint32_t saved_local_ref_cookie,
82 jobject locked, Thread* self) {
83 self->TransitionFromSuspendedToRunnable();
84 UnlockJniSynchronizedMethod(locked, self); // Must decode before pop.
85 mirror::Object* o = self->DecodeJObject(result);
86 PopLocalReferences(saved_local_ref_cookie, self);
87 // Process result.
88 if (UNLIKELY(self->GetJniEnv()->check_jni)) {
89 if (self->IsExceptionPending()) {
90 return NULL;
91 }
92 CheckReferenceResult(o, self);
93 }
94 return o;
95 }
96
97 } // namespace art
98