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