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56adf152f6
because the globals may refer to functions that need to be compiled! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6105 91177308-0d34-0410-b5e6-96231b3b80d8
95 lines
3.0 KiB
C++
95 lines
3.0 KiB
C++
//===- ExecutionEngine.h - Abstract Execution Engine Interface --*- C++ -*-===//
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//
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// This file defines the abstract interface that implements execution support
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// for LLVM.
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//
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//===----------------------------------------------------------------------===//
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#ifndef EXECUTION_ENGINE_H
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#define EXECUTION_ENGINE_H
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#include <vector>
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#include <string>
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#include <map>
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class Constant;
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class Type;
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class GlobalValue;
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class Function;
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class Module;
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class TargetData;
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union GenericValue;
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class ExecutionEngine {
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Module &CurMod;
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const TargetData *TD;
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protected:
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// GlobalAddress - A mapping between LLVM global values and their actualized
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// version...
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std::map<const GlobalValue*, void *> GlobalAddress;
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void setTargetData(const TargetData &td) {
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TD = &td;
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}
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public:
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ExecutionEngine(Module *M) : CurMod(*M) {
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assert(M && "Module is null?");
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}
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virtual ~ExecutionEngine();
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Module &getModule() const { return CurMod; }
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const TargetData &getTargetData() const { return *TD; }
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/// run - Start execution with the specified function and arguments.
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///
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virtual int run(const std::string &FnName,
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const std::vector<std::string> &Args) = 0;
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/// createJIT - Create an return a new JIT compiler if there is one available
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/// for the current target. Otherwise it returns null.
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///
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static ExecutionEngine *createJIT(Module *M, unsigned Config);
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/// createInterpreter - Create a new interpreter object. This can never fail.
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///
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static ExecutionEngine *createInterpreter(Module *M, unsigned Config,
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bool DebugMode, bool TraceMode);
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void addGlobalMapping(const Function *F, void *Addr) {
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void *&CurVal = GlobalAddress[(const GlobalValue*)F];
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assert(CurVal == 0 && "GlobalMapping already established!");
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CurVal = Addr;
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}
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// getPointerToGlobalIfAvailable - This returns the address of the specified
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// global value if it is available, otherwise it returns null.
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//
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void *getPointerToGlobalIfAvailable(const GlobalValue *GV) {
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std::map<const GlobalValue*, void*>::iterator I = GlobalAddress.find(GV);
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return I != GlobalAddress.end() ? I->second : 0;
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}
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// getPointerToGlobal - This returns the address of the specified global
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// value. This may involve code generation if it's a function.
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//
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void *getPointerToGlobal(const GlobalValue *GV);
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// getPointerToFunction - The different EE's represent function bodies in
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// different ways. They should each implement this to say what a function
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// pointer should look like.
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//
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virtual void *getPointerToFunction(const Function *F) = 0;
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protected:
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void emitGlobals();
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public: // FIXME: protected: // API shared among subclasses
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GenericValue getConstantValue(const Constant *C);
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void StoreValueToMemory(GenericValue Val, GenericValue *Ptr, const Type *Ty);
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GenericValue LoadValueFromMemory(GenericValue *Ptr, const Type *Ty);
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void *CreateArgv(const std::vector<std::string> &InputArgv);
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void InitializeMemory(const Constant *Init, void *Addr);
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};
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#endif
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