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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_COMPILER_LLVM_RUNTIME_SUPPORT_BUILDER_H_
     18 #define ART_COMPILER_LLVM_RUNTIME_SUPPORT_BUILDER_H_
     19 
     20 #include "backend_types.h"
     21 #include "base/logging.h"
     22 #include "runtime_support_llvm_func.h"
     23 
     24 #include <stdint.h>
     25 
     26 namespace llvm {
     27   class LLVMContext;
     28   class Module;
     29   class Function;
     30   class Type;
     31   class Value;
     32 }
     33 
     34 namespace art {
     35 namespace llvm {
     36 
     37 class IRBuilder;
     38 
     39 
     40 class RuntimeSupportBuilder {
     41  public:
     42   RuntimeSupportBuilder(::llvm::LLVMContext& context, ::llvm::Module& module, IRBuilder& irb);
     43 
     44   /* Thread */
     45   virtual ::llvm::Value* EmitGetCurrentThread();
     46   virtual ::llvm::Value* EmitLoadFromThreadOffset(int64_t offset, ::llvm::Type* type,
     47                                                 TBAASpecialType s_ty);
     48   virtual void EmitStoreToThreadOffset(int64_t offset, ::llvm::Value* value,
     49                                        TBAASpecialType s_ty);
     50   virtual ::llvm::Value* EmitSetCurrentThread(::llvm::Value* thread);
     51 
     52   /* ShadowFrame */
     53   virtual ::llvm::Value* EmitPushShadowFrame(::llvm::Value* new_shadow_frame,
     54                                            ::llvm::Value* method, uint32_t num_vregs);
     55   virtual ::llvm::Value* EmitPushShadowFrameNoInline(::llvm::Value* new_shadow_frame,
     56                                                    ::llvm::Value* method, uint32_t num_vregs);
     57   virtual void EmitPopShadowFrame(::llvm::Value* old_shadow_frame);
     58 
     59   /* Exception */
     60   virtual ::llvm::Value* EmitGetAndClearException();
     61   virtual ::llvm::Value* EmitIsExceptionPending();
     62 
     63   /* Suspend */
     64   virtual void EmitTestSuspend();
     65 
     66   /* Monitor */
     67   void EmitLockObject(::llvm::Value* object);
     68   void EmitUnlockObject(::llvm::Value* object);
     69 
     70   /* MarkGCCard */
     71   virtual void EmitMarkGCCard(::llvm::Value* value, ::llvm::Value* target_addr);
     72 
     73   ::llvm::Function* GetRuntimeSupportFunction(runtime_support::RuntimeId id) {
     74     if (id >= 0 && id < runtime_support::MAX_ID) {
     75       return runtime_support_func_decls_[id];
     76     } else {
     77       LOG(ERROR) << "Unknown runtime function id: " << id;
     78       return NULL;
     79     }
     80   }
     81 
     82   virtual ~RuntimeSupportBuilder() {}
     83 
     84  protected:
     85   ::llvm::LLVMContext& context_;
     86   ::llvm::Module& module_;
     87   IRBuilder& irb_;
     88 
     89  private:
     90   ::llvm::Function* runtime_support_func_decls_[runtime_support::MAX_ID];
     91   bool target_runtime_support_func_[runtime_support::MAX_ID];
     92 };
     93 
     94 
     95 }  // namespace llvm
     96 }  // namespace art
     97 
     98 #endif  // ART_COMPILER_LLVM_RUNTIME_SUPPORT_BUILDER_H_
     99