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      1 /*
      2  * Copyright 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 BCC_RS_SCRIPT_H
     18 #define BCC_RS_SCRIPT_H
     19 
     20 #include "bcc/Script.h"
     21 #include "bcc/Support/Sha1Util.h"
     22 
     23 namespace llvm {
     24   class Module;
     25 }
     26 
     27 namespace bcc {
     28 
     29 class RSScript;
     30 class Source;
     31 
     32 typedef llvm::Module* (*RSLinkRuntimeCallback) (bcc::RSScript *, llvm::Module *, llvm::Module *);
     33 
     34 
     35 class RSScript : public Script {
     36 public:
     37   // This is one-one mapping with the llvm::CodeGenOpt::Level in
     38   // llvm/Support/CodeGen.h. Therefore, value of this type can safely cast
     39   // to llvm::CodeGenOpt::Level. This makes RSScript LLVM-free.
     40   enum OptimizationLevel {
     41     kOptLvl0, // -O0
     42     kOptLvl1, // -O1
     43     kOptLvl2, // -O2, -Os
     44     kOptLvl3  // -O3
     45   };
     46 
     47 private:
     48   unsigned mCompilerVersion;
     49 
     50   OptimizationLevel mOptimizationLevel;
     51 
     52   RSLinkRuntimeCallback mLinkRuntimeCallback;
     53 
     54   bool mEmbedInfo;
     55 
     56   // Specifies whether we should embed global variable information in the
     57   // code via special RS variables that can be examined later by the driver.
     58   bool mEmbedGlobalInfo;
     59 
     60   // Specifies whether we should skip constant (immutable) global variables
     61   // when potentially embedding information about globals.
     62   bool mEmbedGlobalInfoSkipConstant;
     63 
     64 private:
     65   // This will be invoked when the containing source has been reset.
     66   virtual bool doReset();
     67 
     68 public:
     69   static bool LinkRuntime(RSScript &pScript, const char *rt_path = nullptr);
     70 
     71   RSScript(Source &pSource);
     72 
     73   virtual ~RSScript() { }
     74 
     75   void setCompilerVersion(unsigned pCompilerVersion) {
     76     mCompilerVersion = pCompilerVersion;
     77   }
     78 
     79   unsigned getCompilerVersion() const {
     80     return mCompilerVersion;
     81   }
     82 
     83   void setOptimizationLevel(OptimizationLevel pOptimizationLevel) {
     84     mOptimizationLevel = pOptimizationLevel;
     85   }
     86 
     87   OptimizationLevel getOptimizationLevel() const {
     88     return mOptimizationLevel;
     89   }
     90 
     91   void setLinkRuntimeCallback(RSLinkRuntimeCallback fn){
     92     mLinkRuntimeCallback = fn;
     93   }
     94 
     95   void setEmbedInfo(bool pEnable) {
     96     mEmbedInfo = pEnable;
     97   }
     98 
     99   bool getEmbedInfo() const {
    100     return mEmbedInfo;
    101   }
    102 
    103   // Set to true if we should embed global variable information in the code.
    104   void setEmbedGlobalInfo(bool pEnable) {
    105     mEmbedGlobalInfo = pEnable;
    106   }
    107 
    108   // Returns true if we should embed global variable information in the code.
    109   bool getEmbedGlobalInfo() const {
    110     return mEmbedGlobalInfo;
    111   }
    112 
    113   // Set to true if we should skip constant (immutable) global variables when
    114   // potentially embedding information about globals.
    115   void setEmbedGlobalInfoSkipConstant(bool pEnable) {
    116     mEmbedGlobalInfoSkipConstant = pEnable;
    117   }
    118 
    119   // Returns true if we should skip constant (immutable) global variables when
    120   // potentially embedding information about globals.
    121   bool getEmbedGlobalInfoSkipConstant() const {
    122     return mEmbedGlobalInfoSkipConstant;
    123   }
    124 };
    125 
    126 } // end namespace bcc
    127 
    128 #endif // BCC_RS_SCRIPT_H
    129