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f049e07eb8
1. The "JITState" object creates a PassManager with the ModuleProvider that the jit is created with. If the ModuleProvider is removed and deleted, the PassManager is invalid. 2. The Global maps in the JIT were not invalidated with a ModuleProvider was removed. This could lead to a case where the Module would be freed, and a new Module with Globals at the same addresses could return invalid results. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51384 91177308-0d34-0410-b5e6-96231b3b80d8
142 lines
4.5 KiB
C++
142 lines
4.5 KiB
C++
//===-- JIT.h - Class definition for the JIT --------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the top-level JIT data structure.
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//
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//===----------------------------------------------------------------------===//
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#ifndef JIT_H
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#define JIT_H
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/PassManager.h"
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#include <map>
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namespace llvm {
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class Function;
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class GlobalValue;
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class Constant;
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class TargetMachine;
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class TargetJITInfo;
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class MachineCodeEmitter;
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class JITState {
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private:
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FunctionPassManager PM; // Passes to compile a function
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/// PendingGlobals - Global variables which have had memory allocated for them
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/// while a function was code generated, but which have not been initialized
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/// yet.
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std::vector<const GlobalVariable*> PendingGlobals;
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public:
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explicit JITState(ModuleProvider *MP) : PM(MP) {}
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FunctionPassManager &getPM(const MutexGuard &L) {
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return PM;
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}
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std::vector<const GlobalVariable*> &getPendingGlobals(const MutexGuard &L) {
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return PendingGlobals;
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}
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};
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class JIT : public ExecutionEngine {
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TargetMachine &TM; // The current target we are compiling to
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TargetJITInfo &TJI; // The JITInfo for the target we are compiling to
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MachineCodeEmitter *MCE; // MCE object
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JITState *jitstate;
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JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji,
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JITMemoryManager *JMM);
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public:
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~JIT();
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static void Register() {
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JITCtor = create;
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}
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/// getJITInfo - Return the target JIT information structure.
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///
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TargetJITInfo &getJITInfo() const { return TJI; }
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/// create - Create an return a new JIT compiler if there is one available
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/// for the current target. Otherwise, return null.
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///
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static ExecutionEngine *create(ModuleProvider *MP, std::string *Err) {
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return createJIT(MP, Err, 0);
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}
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virtual void addModuleProvider(ModuleProvider *MP);
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virtual Module *removeModuleProvider(ModuleProvider *MP,
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std::string *ErrInfo = 0);
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/// run - Start execution with the specified function and arguments.
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///
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virtual GenericValue runFunction(Function *F,
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const std::vector<GenericValue> &ArgValues);
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/// getPointerToNamedFunction - This method returns the address of the
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/// specified function by using the dlsym function call. As such it is only
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/// useful for resolving library symbols, not code generated symbols.
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///
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void *getPointerToNamedFunction(const std::string &Name);
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// CompilationCallback - Invoked the first time that a call site is found,
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// which causes lazy compilation of the target function.
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//
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static void CompilationCallback();
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/// getPointerToFunction - This returns the address of the specified function,
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/// compiling it if necessary.
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///
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void *getPointerToFunction(Function *F);
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/// getOrEmitGlobalVariable - Return the address of the specified global
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/// variable, possibly emitting it to memory if needed. This is used by the
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/// Emitter.
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void *getOrEmitGlobalVariable(const GlobalVariable *GV);
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/// getPointerToFunctionOrStub - If the specified function has been
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/// code-gen'd, return a pointer to the function. If not, compile it, or use
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/// a stub to implement lazy compilation if available.
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///
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void *getPointerToFunctionOrStub(Function *F);
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/// recompileAndRelinkFunction - This method is used to force a function
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/// which has already been compiled, to be compiled again, possibly
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/// after it has been modified. Then the entry to the old copy is overwritten
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/// with a branch to the new copy. If there was no old copy, this acts
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/// just like JIT::getPointerToFunction().
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///
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void *recompileAndRelinkFunction(Function *F);
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/// freeMachineCodeForFunction - deallocate memory used to code-generate this
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/// Function.
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///
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void freeMachineCodeForFunction(Function *F);
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/// getCodeEmitter - Return the code emitter this JIT is emitting into.
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MachineCodeEmitter *getCodeEmitter() const { return MCE; }
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static ExecutionEngine *createJIT(ModuleProvider *MP, std::string *Err,
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JITMemoryManager *JMM);
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private:
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static MachineCodeEmitter *createEmitter(JIT &J, JITMemoryManager *JMM);
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void runJITOnFunction (Function *F);
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};
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} // End llvm namespace
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#endif
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