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      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 #ifndef ART_RUNTIME_ENTRYPOINTS_QUICK_QUICK_ENTRYPOINTS_H_
     18 #define ART_RUNTIME_ENTRYPOINTS_QUICK_QUICK_ENTRYPOINTS_H_
     19 
     20 #include <jni.h>
     21 
     22 #include "base/macros.h"
     23 #include "base/mutex.h"
     24 #include "deoptimization_kind.h"
     25 #include "offsets.h"
     26 
     27 #define QUICK_ENTRYPOINT_OFFSET(ptr_size, x) \
     28     Thread::QuickEntryPointOffset<ptr_size>(OFFSETOF_MEMBER(QuickEntryPoints, x))
     29 
     30 namespace art {
     31 
     32 namespace mirror {
     33 class Array;
     34 class Class;
     35 template<class MirrorType> class CompressedReference;
     36 class Object;
     37 }  // namespace mirror
     38 
     39 class ArtMethod;
     40 template<class MirrorType> class GcRoot;
     41 template<class MirrorType> class StackReference;
     42 class Thread;
     43 
     44 // Pointers to functions that are called by quick compiler generated code via thread-local storage.
     45 struct PACKED(4) QuickEntryPoints {
     46 #define ENTRYPOINT_ENUM(name, rettype, ...) rettype ( * p ## name )( __VA_ARGS__ );
     47 #include "quick_entrypoints_list.h"
     48   QUICK_ENTRYPOINT_LIST(ENTRYPOINT_ENUM)
     49 #undef QUICK_ENTRYPOINT_LIST
     50 #undef ENTRYPOINT_ENUM
     51 };
     52 
     53 
     54 // JNI entrypoints.
     55 // TODO: NO_THREAD_SAFETY_ANALYSIS due to different control paths depending on fast JNI.
     56 extern uint32_t JniMethodStart(Thread* self) NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     57 extern uint32_t JniMethodFastStart(Thread* self) NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     58 extern uint32_t JniMethodStartSynchronized(jobject to_lock, Thread* self)
     59     NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     60 extern void JniMethodEnd(uint32_t saved_local_ref_cookie, Thread* self)
     61     NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     62 extern void JniMethodFastEnd(uint32_t saved_local_ref_cookie, Thread* self)
     63     NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     64 extern void JniMethodEndSynchronized(uint32_t saved_local_ref_cookie, jobject locked,
     65                                      Thread* self)
     66     NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     67 extern mirror::Object* JniMethodEndWithReference(jobject result, uint32_t saved_local_ref_cookie,
     68                                                  Thread* self)
     69     NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     70 extern mirror::Object* JniMethodFastEndWithReference(jobject result,
     71                                                      uint32_t saved_local_ref_cookie,
     72                                                      Thread* self)
     73     NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     74 
     75 
     76 extern mirror::Object* JniMethodEndWithReferenceSynchronized(jobject result,
     77                                                              uint32_t saved_local_ref_cookie,
     78                                                              jobject locked, Thread* self)
     79     NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     80 
     81 extern void ReadBarrierJni(mirror::CompressedReference<mirror::Object>* handle_on_stack,
     82                            Thread* self)
     83     NO_THREAD_SAFETY_ANALYSIS HOT_ATTR;
     84 
     85 
     86 // Read barrier entrypoints.
     87 //
     88 // Compilers for ARM, ARM64, MIPS, MIPS64 can insert a call to these
     89 // functions directly.  For x86 and x86-64, compilers need a wrapper
     90 // assembly function, to handle mismatch in ABI.
     91 
     92 // Mark the heap reference `obj`. This entry point is used by read
     93 // barrier fast path implementations generated by the compiler to mark
     94 // an object that is referenced by a field of a gray object.
     95 extern "C" mirror::Object* artReadBarrierMark(mirror::Object* obj)
     96     REQUIRES_SHARED(Locks::mutator_lock_) HOT_ATTR;
     97 
     98 // Read barrier entrypoint for heap references.
     99 // This is the read barrier slow path for instance and static fields
    100 // and reference type arrays.
    101 extern "C" mirror::Object* artReadBarrierSlow(mirror::Object* ref,
    102                                               mirror::Object* obj,
    103                                               uint32_t offset)
    104     REQUIRES_SHARED(Locks::mutator_lock_) HOT_ATTR;
    105 
    106 // Read barrier entrypoint for GC roots.
    107 extern "C" mirror::Object* artReadBarrierForRootSlow(GcRoot<mirror::Object>* root)
    108     REQUIRES_SHARED(Locks::mutator_lock_) HOT_ATTR;
    109 
    110 }  // namespace art
    111 
    112 #endif  // ART_RUNTIME_ENTRYPOINTS_QUICK_QUICK_ENTRYPOINTS_H_
    113