#ifndef LLI_INTERPRETER_H
#define LLI_INTERPRETER_H
-// Uncomment this line to enable profiling of structure field accesses.
-//#define PROFILE_STRUCTURE_FIELDS 1
-
#include "../ExecutionEngine.h"
+#include "../GenericValue.h"
#include "Support/DataTypes.h"
#include "llvm/Assembly/CachedWriter.h"
#include "llvm/Target/TargetData.h"
#include "llvm/BasicBlock.h"
-#include "../GenericValue.h"
+#include "llvm/Support/InstVisitor.h"
extern CachedWriter CW; // Object to accelerate printing of LLVM
-struct MethodInfo; // Defined in ExecutionAnnotations.h
-class CallInst;
-class ReturnInst;
-class BranchInst;
-class LoadInst;
-class StoreInst;
-class AllocationInst;
+struct FunctionInfo; // Defined in ExecutionAnnotations.h
// AllocaHolder - Object to track all of the blocks of memory allocated by
// alloca. When the function returns, this object is poped off the execution
// executing.
//
struct ExecutionContext {
- Function *CurMethod; // The currently executing function
+ Function *CurFunction;// The currently executing function
BasicBlock *CurBB; // The currently executing BB
BasicBlock::iterator CurInst; // The next instruction to execute
- MethodInfo *MethInfo; // The MethInfo annotation for the function
+ FunctionInfo *FuncInfo; // The FuncInfo annotation for the function
std::vector<ValuePlaneTy> Values;// ValuePlanes for each type
std::vector<GenericValue> VarArgs; // Values passed through an ellipsis
- BasicBlock *PrevBB; // The previous BB or null if in first BB
CallInst *Caller; // Holds the call that called subframes.
// NULL if main func or debugger invoked fn
AllocaHolderHandle Allocas; // Track memory allocated by alloca
// Interpreter - This class represents the entirety of the interpreter.
//
-class Interpreter : public ExecutionEngine {
+class Interpreter : public ExecutionEngine, public InstVisitor<Interpreter> {
int ExitCode; // The exit code to be returned by the lli util
- bool Debug; // Debug mode enabled?
- bool Profile; // Profiling enabled?
bool Trace; // Tracing enabled?
int CurFrame; // The current stack frame being inspected
TargetData TD;
// function record.
std::vector<ExecutionContext> ECStack;
+ // AtExitHandlers - List of functions to call when the program exits,
+ // registered with the atexit() library function.
+ std::vector<Function*> AtExitHandlers;
public:
- Interpreter(Module *M, unsigned Config, bool DebugMode, bool TraceMode);
+ Interpreter(Module *M, bool isLittleEndian, bool isLongPointer,
+ bool TraceMode);
inline ~Interpreter() { CW.setModule(0); }
- // getExitCode - return the code that should be the exit code for the lli
- // utility.
- inline int getExitCode() const { return ExitCode; }
-
- /// run - Start execution with the specified function and arguments.
+ /// runAtExitHandlers - Run any functions registered by the
+ /// program's calls to atexit(3), which we intercept and store in
+ /// AtExitHandlers.
///
- virtual int run(const std::string &FnName,
- const std::vector<std::string> &Args);
-
+ void runAtExitHandlers ();
- // enableProfiling() - Turn profiling on, clear stats?
- void enableProfiling() { Profile = true; }
- void enableTracing() { Trace = true; }
+ /// create - Create an interpreter ExecutionEngine. This can never fail.
+ ///
+ static ExecutionEngine *create(Module *M, bool TraceMode);
- void handleUserInput();
+ /// run - Start execution with the specified function and arguments.
+ ///
+ virtual GenericValue run(Function *F,
+ const std::vector<GenericValue> &ArgValues);
- // User Interation Methods...
- bool callMethod(const std::string &Name); // return true on failure
- void setBreakpoint(const std::string &Name);
- void infoValue(const std::string &Name);
- void print(const std::string &Name);
+ // Methods used for debug printouts:
static void print(const Type *Ty, GenericValue V);
static void printValue(const Type *Ty, GenericValue V);
- bool callMainMethod(const std::string &MainName,
- const std::vector<std::string> &InputFilename);
-
- void list(); // Do the 'list' command
- void printStackTrace(); // Do the 'backtrace' command
-
- // Code execution methods...
- void callMethod(Function *F, const std::vector<GenericValue> &ArgVals);
- bool executeInstruction(); // Execute one instruction...
-
- void stepInstruction(); // Do the 'step' command
- void nextInstruction(); // Do the 'next' command
- void run(); // Do the 'run' command
- void finish(); // Do the 'finish' command
+ // Methods used to execute code:
+ // Place a call on the stack
+ void callFunction(Function *F, const std::vector<GenericValue> &ArgVals);
+ void executeInstruction(); // Execute one instruction
+ void run(); // Execute instructions until nothing left to do
// Opcode Implementations
- void executeCallInst(CallInst &I, ExecutionContext &SF);
- void executeRetInst(ReturnInst &I, ExecutionContext &SF);
- void executeBrInst(BranchInst &I, ExecutionContext &SF);
- void executeAllocInst(AllocationInst &I, ExecutionContext &SF);
- GenericValue callExternalMethod(Function *F,
- const std::vector<GenericValue> &ArgVals);
+ void visitReturnInst(ReturnInst &I);
+ void visitBranchInst(BranchInst &I);
+ void visitSwitchInst(SwitchInst &I);
+
+ void visitBinaryOperator(BinaryOperator &I);
+ void visitAllocationInst(AllocationInst &I);
+ void visitFreeInst(FreeInst &I);
+ void visitLoadInst(LoadInst &I);
+ void visitStoreInst(StoreInst &I);
+ void visitGetElementPtrInst(GetElementPtrInst &I);
+
+ void visitPHINode(PHINode &PN) { assert(0 && "PHI nodes already handled!"); }
+ void visitCastInst(CastInst &I);
+ void visitCallInst(CallInst &I);
+ void visitShl(ShiftInst &I);
+ void visitShr(ShiftInst &I);
+ void visitVarArgInst(VarArgInst &I);
+ void visitInstruction(Instruction &I) {
+ std::cerr << I;
+ assert(0 && "Instruction not interpretable yet!");
+ }
+
+ GenericValue callExternalFunction(Function *F,
+ const std::vector<GenericValue> &ArgVals);
void exitCalled(GenericValue GV);
- // getCurrentMethod - Return the currently executing method
- inline Function *getCurrentMethod() const {
- return CurFrame < 0 ? 0 : ECStack[CurFrame].CurMethod;
+ void addAtExitHandler(Function *F) {
+ AtExitHandlers.push_back(F);
}
- // isStopped - Return true if a program is stopped. Return false if no
- // program is running.
- //
- inline bool isStopped() const { return !ECStack.empty(); }
-
//FIXME: private:
public:
GenericValue executeGEPOperation(Value *Ptr, User::op_iterator I,
User::op_iterator E, ExecutionContext &SF);
- void executeLoadInst(LoadInst &I, ExecutionContext &SF);
- void executeStoreInst(StoreInst &I, ExecutionContext &SF);
-
private: // Helper functions
- void *getPointerToFunction(const Function *F) { return (void*)F; }
-
- // getCurrentExecutablePath() - Return the directory that the lli executable
- // lives in.
- //
- std::string getCurrentExecutablePath() const;
-
- // printCurrentInstruction - Print out the instruction that the virtual PC is
- // at, or fail silently if no program is running.
- //
- void printCurrentInstruction();
-
- // printStackFrame - Print information about the specified stack frame, or -1
- // for the default one.
- //
- void printStackFrame(int FrameNo = -1);
-
- // LookupMatchingNames - Search the current function namespace, then the
- // global namespace looking for values that match the specified name. Return
- // ALL matches to that name. This is obviously slow, and should only be used
- // for user interaction.
- //
- std::vector<Value*> LookupMatchingNames(const std::string &Name);
-
- // ChooseOneOption - Prompt the user to choose among the specified options to
- // pick one value. If no options are provided, emit an error. If a single
- // option is provided, just return that option.
- //
- Value *ChooseOneOption(const std::string &Name,
- const std::vector<Value*> &Opts);
+ // SwitchToNewBasicBlock - Start execution in a new basic block and run any
+ // PHI nodes in the top of the block. This is used for intraprocedural
+ // control flow.
+ //
+ void SwitchToNewBasicBlock(BasicBlock *Dest, ExecutionContext &SF);
+ void *getPointerToFunction(Function *F) { return (void*)F; }
void initializeExecutionEngine();
- void initializeExternalMethods();
+ void initializeExternalFunctions();
+ GenericValue getOperandValue(Value *V, ExecutionContext &SF);
+ GenericValue executeCastOperation(Value *SrcVal, const Type *Ty,
+ ExecutionContext &SF);
};
#endif
projects / oota-llvm.git / blobdiff