1 //===-- Execution.cpp - Implement code to simulate the program ------------===//
3 // This file contains the actual instruction interpreter.
5 //===----------------------------------------------------------------------===//
7 #include "Interpreter.h"
8 #include "ExecutionAnnotations.h"
9 #include "llvm/iPHINode.h"
10 #include "llvm/iOther.h"
11 #include "llvm/iTerminators.h"
12 #include "llvm/iMemory.h"
13 #include "llvm/Type.h"
14 #include "llvm/ConstantVals.h"
15 #include "llvm/Assembly/Writer.h"
16 #include "llvm/Target/TargetData.h"
17 #include "llvm/GlobalVariable.h"
18 #include "Support/CommandLine.h"
19 #include <math.h> // For fmod
27 cl::Flag QuietMode ("quiet" , "Do not emit any non-program output");
28 cl::Alias QuietModeA("q" , "Alias for -quiet", cl::NoFlags, QuietMode);
29 cl::Flag ArrayChecksEnabled("array-checks", "Enable array bound checks");
30 cl::Flag AbortOnExceptions("abort-on-exception", "Halt execution on a machine exception");
32 // Create a TargetData structure to handle memory addressing and size/alignment
35 static TargetData TD("lli Interpreter");
36 CachedWriter CW; // Object to accelerate printing of LLVM
39 #ifdef PROFILE_STRUCTURE_FIELDS
40 static cl::Flag ProfileStructureFields("profilestructfields",
41 "Profile Structure Field Accesses");
43 static std::map<const StructType *, vector<unsigned> > FieldAccessCounts;
46 sigjmp_buf SignalRecoverBuffer;
47 static bool InInstruction = false;
50 static void SigHandler(int Signal) {
52 siglongjmp(SignalRecoverBuffer, Signal);
56 static void initializeSignalHandlers() {
57 struct sigaction Action;
58 Action.sa_handler = SigHandler;
59 Action.sa_flags = SA_SIGINFO;
60 sigemptyset(&Action.sa_mask);
61 sigaction(SIGSEGV, &Action, 0);
62 sigaction(SIGBUS, &Action, 0);
63 sigaction(SIGINT, &Action, 0);
64 sigaction(SIGFPE, &Action, 0);
68 //===----------------------------------------------------------------------===//
69 // Value Manipulation code
70 //===----------------------------------------------------------------------===//
72 static unsigned getOperandSlot(Value *V) {
73 SlotNumber *SN = (SlotNumber*)V->getAnnotation(SlotNumberAID);
74 assert(SN && "Operand does not have a slot number annotation!");
78 #define GET_CONST_VAL(TY, CLASS) \
79 case Type::TY##TyID: Result.TY##Val = cast<CLASS>(CPV)->getValue(); break
81 static GenericValue getOperandValue(Value *V, ExecutionContext &SF) {
82 if (Constant *CPV = dyn_cast<Constant>(V)) {
84 switch (CPV->getType()->getPrimitiveID()) {
85 GET_CONST_VAL(Bool , ConstantBool);
86 GET_CONST_VAL(UByte , ConstantUInt);
87 GET_CONST_VAL(SByte , ConstantSInt);
88 GET_CONST_VAL(UShort , ConstantUInt);
89 GET_CONST_VAL(Short , ConstantSInt);
90 GET_CONST_VAL(UInt , ConstantUInt);
91 GET_CONST_VAL(Int , ConstantSInt);
92 GET_CONST_VAL(ULong , ConstantUInt);
93 GET_CONST_VAL(Long , ConstantSInt);
94 GET_CONST_VAL(Float , ConstantFP);
95 GET_CONST_VAL(Double , ConstantFP);
96 case Type::PointerTyID:
97 if (isa<ConstantPointerNull>(CPV)) {
98 Result.PointerVal = 0;
99 } else if (isa<ConstantPointerRef>(CPV)) {
100 assert(0 && "Not implemented!");
102 assert(0 && "Unknown constant pointer type!");
106 cout << "ERROR: Constant unimp for type: " << CPV->getType() << "\n";
109 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
110 GlobalAddress *Address =
111 (GlobalAddress*)GV->getOrCreateAnnotation(GlobalAddressAID);
113 Result.PointerVal = (PointerTy)(GenericValue*)Address->Ptr;
116 unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
117 unsigned OpSlot = getOperandSlot(V);
118 assert(TyP < SF.Values.size() &&
119 OpSlot < SF.Values[TyP].size() && "Value out of range!");
120 return SF.Values[TyP][getOperandSlot(V)];
124 static void printOperandInfo(Value *V, ExecutionContext &SF) {
125 if (isa<Constant>(V)) {
126 cout << "Constant Pool Value\n";
127 } else if (isa<GlobalValue>(V)) {
128 cout << "Global Value\n";
130 unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
131 unsigned Slot = getOperandSlot(V);
132 cout << "Value=" << (void*)V << " TypeID=" << TyP << " Slot=" << Slot
133 << " Addr=" << &SF.Values[TyP][Slot] << " SF=" << &SF
136 const unsigned char *Buf = (const unsigned char*)&SF.Values[TyP][Slot];
137 for (unsigned i = 0; i < sizeof(GenericValue); ++i) {
138 unsigned char Cur = Buf[i];
139 cout << ( Cur >= 160? char((Cur>>4)+'A'-10) : char((Cur>>4) + '0'))
140 << ((Cur&15) >= 10? char((Cur&15)+'A'-10) : char((Cur&15) + '0'));
148 static void SetValue(Value *V, GenericValue Val, ExecutionContext &SF) {
149 unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
151 //cout << "Setting value: " << &SF.Values[TyP][getOperandSlot(V)] << "\n";
152 SF.Values[TyP][getOperandSlot(V)] = Val;
156 //===----------------------------------------------------------------------===//
157 // Annotation Wrangling code
158 //===----------------------------------------------------------------------===//
160 void Interpreter::initializeExecutionEngine() {
161 AnnotationManager::registerAnnotationFactory(MethodInfoAID,
162 &MethodInfo::Create);
163 AnnotationManager::registerAnnotationFactory(GlobalAddressAID,
164 &GlobalAddress::Create);
165 initializeSignalHandlers();
168 // InitializeMemory - Recursive function to apply a Constant value into the
169 // specified memory location...
171 static void InitializeMemory(Constant *Init, char *Addr) {
172 #define INITIALIZE_MEMORY(TYID, CLASS, TY) \
173 case Type::TYID##TyID: { \
174 TY Tmp = cast<CLASS>(Init)->getValue(); \
175 memcpy(Addr, &Tmp, sizeof(TY)); \
178 switch (Init->getType()->getPrimitiveID()) {
179 INITIALIZE_MEMORY(Bool , ConstantBool, bool);
180 INITIALIZE_MEMORY(UByte , ConstantUInt, unsigned char);
181 INITIALIZE_MEMORY(SByte , ConstantSInt, signed char);
182 INITIALIZE_MEMORY(UShort , ConstantUInt, unsigned short);
183 INITIALIZE_MEMORY(Short , ConstantSInt, signed short);
184 INITIALIZE_MEMORY(UInt , ConstantUInt, unsigned int);
185 INITIALIZE_MEMORY(Int , ConstantSInt, signed int);
186 INITIALIZE_MEMORY(ULong , ConstantUInt, uint64_t);
187 INITIALIZE_MEMORY(Long , ConstantSInt, int64_t);
188 INITIALIZE_MEMORY(Float , ConstantFP , float);
189 INITIALIZE_MEMORY(Double , ConstantFP , double);
190 #undef INITIALIZE_MEMORY
192 case Type::ArrayTyID: {
193 ConstantArray *CPA = cast<ConstantArray>(Init);
194 const vector<Use> &Val = CPA->getValues();
195 unsigned ElementSize =
196 TD.getTypeSize(cast<ArrayType>(CPA->getType())->getElementType());
197 for (unsigned i = 0; i < Val.size(); ++i)
198 InitializeMemory(cast<Constant>(Val[i].get()), Addr+i*ElementSize);
202 case Type::StructTyID: {
203 ConstantStruct *CPS = cast<ConstantStruct>(Init);
204 const StructLayout *SL=TD.getStructLayout(cast<StructType>(CPS->getType()));
205 const vector<Use> &Val = CPS->getValues();
206 for (unsigned i = 0; i < Val.size(); ++i)
207 InitializeMemory(cast<Constant>(Val[i].get()),
208 Addr+SL->MemberOffsets[i]);
212 case Type::PointerTyID:
213 if (isa<ConstantPointerNull>(Init)) {
215 } else if (ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(Init)) {
216 GlobalAddress *Address =
217 (GlobalAddress*)CPR->getValue()->getOrCreateAnnotation(GlobalAddressAID);
218 *(void**)Addr = (GenericValue*)Address->Ptr;
220 assert(0 && "Unknown Constant pointer type!");
225 CW << "Bad Type: " << Init->getType() << "\n";
226 assert(0 && "Unknown constant type to initialize memory with!");
230 Annotation *GlobalAddress::Create(AnnotationID AID, const Annotable *O, void *){
231 assert(AID == GlobalAddressAID);
233 // This annotation will only be created on GlobalValue objects...
234 GlobalValue *GVal = cast<GlobalValue>((Value*)O);
236 if (isa<Function>(GVal)) {
237 // The GlobalAddress object for a function is just a pointer to function
238 // itself. Don't delete it when the annotation is gone though!
239 return new GlobalAddress(GVal, false);
242 // Handle the case of a global variable...
243 assert(isa<GlobalVariable>(GVal) &&
244 "Global value found that isn't a function or global variable!");
245 GlobalVariable *GV = cast<GlobalVariable>(GVal);
247 // First off, we must allocate space for the global variable to point at...
248 const Type *Ty = GV->getType()->getElementType(); // Type to be allocated
250 // Allocate enough memory to hold the type...
251 void *Addr = calloc(1, TD.getTypeSize(Ty));
252 assert(Addr != 0 && "Null pointer returned by malloc!");
254 // Initialize the memory if there is an initializer...
255 if (GV->hasInitializer())
256 InitializeMemory(GV->getInitializer(), (char*)Addr);
258 return new GlobalAddress(Addr, true); // Simply invoke the ctor
262 //===----------------------------------------------------------------------===//
263 // Binary Instruction Implementations
264 //===----------------------------------------------------------------------===//
266 #define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
267 case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; break
269 static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
270 const Type *Ty, ExecutionContext &SF) {
272 switch (Ty->getPrimitiveID()) {
273 IMPLEMENT_BINARY_OPERATOR(+, UByte);
274 IMPLEMENT_BINARY_OPERATOR(+, SByte);
275 IMPLEMENT_BINARY_OPERATOR(+, UShort);
276 IMPLEMENT_BINARY_OPERATOR(+, Short);
277 IMPLEMENT_BINARY_OPERATOR(+, UInt);
278 IMPLEMENT_BINARY_OPERATOR(+, Int);
279 IMPLEMENT_BINARY_OPERATOR(+, ULong);
280 IMPLEMENT_BINARY_OPERATOR(+, Long);
281 IMPLEMENT_BINARY_OPERATOR(+, Float);
282 IMPLEMENT_BINARY_OPERATOR(+, Double);
283 IMPLEMENT_BINARY_OPERATOR(+, Pointer);
285 cout << "Unhandled type for Add instruction: " << Ty << "\n";
290 static GenericValue executeSubInst(GenericValue Src1, GenericValue Src2,
291 const Type *Ty, ExecutionContext &SF) {
293 switch (Ty->getPrimitiveID()) {
294 IMPLEMENT_BINARY_OPERATOR(-, UByte);
295 IMPLEMENT_BINARY_OPERATOR(-, SByte);
296 IMPLEMENT_BINARY_OPERATOR(-, UShort);
297 IMPLEMENT_BINARY_OPERATOR(-, Short);
298 IMPLEMENT_BINARY_OPERATOR(-, UInt);
299 IMPLEMENT_BINARY_OPERATOR(-, Int);
300 IMPLEMENT_BINARY_OPERATOR(-, ULong);
301 IMPLEMENT_BINARY_OPERATOR(-, Long);
302 IMPLEMENT_BINARY_OPERATOR(-, Float);
303 IMPLEMENT_BINARY_OPERATOR(-, Double);
304 IMPLEMENT_BINARY_OPERATOR(-, Pointer);
306 cout << "Unhandled type for Sub instruction: " << Ty << "\n";
311 static GenericValue executeMulInst(GenericValue Src1, GenericValue Src2,
312 const Type *Ty, ExecutionContext &SF) {
314 switch (Ty->getPrimitiveID()) {
315 IMPLEMENT_BINARY_OPERATOR(*, UByte);
316 IMPLEMENT_BINARY_OPERATOR(*, SByte);
317 IMPLEMENT_BINARY_OPERATOR(*, UShort);
318 IMPLEMENT_BINARY_OPERATOR(*, Short);
319 IMPLEMENT_BINARY_OPERATOR(*, UInt);
320 IMPLEMENT_BINARY_OPERATOR(*, Int);
321 IMPLEMENT_BINARY_OPERATOR(*, ULong);
322 IMPLEMENT_BINARY_OPERATOR(*, Long);
323 IMPLEMENT_BINARY_OPERATOR(*, Float);
324 IMPLEMENT_BINARY_OPERATOR(*, Double);
325 IMPLEMENT_BINARY_OPERATOR(*, Pointer);
327 cout << "Unhandled type for Mul instruction: " << Ty << "\n";
332 static GenericValue executeDivInst(GenericValue Src1, GenericValue Src2,
333 const Type *Ty, ExecutionContext &SF) {
335 switch (Ty->getPrimitiveID()) {
336 IMPLEMENT_BINARY_OPERATOR(/, UByte);
337 IMPLEMENT_BINARY_OPERATOR(/, SByte);
338 IMPLEMENT_BINARY_OPERATOR(/, UShort);
339 IMPLEMENT_BINARY_OPERATOR(/, Short);
340 IMPLEMENT_BINARY_OPERATOR(/, UInt);
341 IMPLEMENT_BINARY_OPERATOR(/, Int);
342 IMPLEMENT_BINARY_OPERATOR(/, ULong);
343 IMPLEMENT_BINARY_OPERATOR(/, Long);
344 IMPLEMENT_BINARY_OPERATOR(/, Float);
345 IMPLEMENT_BINARY_OPERATOR(/, Double);
346 IMPLEMENT_BINARY_OPERATOR(/, Pointer);
348 cout << "Unhandled type for Div instruction: " << Ty << "\n";
353 static GenericValue executeRemInst(GenericValue Src1, GenericValue Src2,
354 const Type *Ty, ExecutionContext &SF) {
356 switch (Ty->getPrimitiveID()) {
357 IMPLEMENT_BINARY_OPERATOR(%, UByte);
358 IMPLEMENT_BINARY_OPERATOR(%, SByte);
359 IMPLEMENT_BINARY_OPERATOR(%, UShort);
360 IMPLEMENT_BINARY_OPERATOR(%, Short);
361 IMPLEMENT_BINARY_OPERATOR(%, UInt);
362 IMPLEMENT_BINARY_OPERATOR(%, Int);
363 IMPLEMENT_BINARY_OPERATOR(%, ULong);
364 IMPLEMENT_BINARY_OPERATOR(%, Long);
365 IMPLEMENT_BINARY_OPERATOR(%, Pointer);
366 case Type::FloatTyID:
367 Dest.FloatVal = fmod(Src1.FloatVal, Src2.FloatVal);
369 case Type::DoubleTyID:
370 Dest.DoubleVal = fmod(Src1.DoubleVal, Src2.DoubleVal);
373 cout << "Unhandled type for Rem instruction: " << Ty << "\n";
378 static GenericValue executeAndInst(GenericValue Src1, GenericValue Src2,
379 const Type *Ty, ExecutionContext &SF) {
381 switch (Ty->getPrimitiveID()) {
382 IMPLEMENT_BINARY_OPERATOR(&, UByte);
383 IMPLEMENT_BINARY_OPERATOR(&, SByte);
384 IMPLEMENT_BINARY_OPERATOR(&, UShort);
385 IMPLEMENT_BINARY_OPERATOR(&, Short);
386 IMPLEMENT_BINARY_OPERATOR(&, UInt);
387 IMPLEMENT_BINARY_OPERATOR(&, Int);
388 IMPLEMENT_BINARY_OPERATOR(&, ULong);
389 IMPLEMENT_BINARY_OPERATOR(&, Long);
390 IMPLEMENT_BINARY_OPERATOR(&, Pointer);
392 cout << "Unhandled type for And instruction: " << Ty << "\n";
398 static GenericValue executeOrInst(GenericValue Src1, GenericValue Src2,
399 const Type *Ty, ExecutionContext &SF) {
401 switch (Ty->getPrimitiveID()) {
402 IMPLEMENT_BINARY_OPERATOR(|, UByte);
403 IMPLEMENT_BINARY_OPERATOR(|, SByte);
404 IMPLEMENT_BINARY_OPERATOR(|, UShort);
405 IMPLEMENT_BINARY_OPERATOR(|, Short);
406 IMPLEMENT_BINARY_OPERATOR(|, UInt);
407 IMPLEMENT_BINARY_OPERATOR(|, Int);
408 IMPLEMENT_BINARY_OPERATOR(|, ULong);
409 IMPLEMENT_BINARY_OPERATOR(|, Long);
410 IMPLEMENT_BINARY_OPERATOR(|, Pointer);
412 cout << "Unhandled type for Or instruction: " << Ty << "\n";
418 static GenericValue executeXorInst(GenericValue Src1, GenericValue Src2,
419 const Type *Ty, ExecutionContext &SF) {
421 switch (Ty->getPrimitiveID()) {
422 IMPLEMENT_BINARY_OPERATOR(^, UByte);
423 IMPLEMENT_BINARY_OPERATOR(^, SByte);
424 IMPLEMENT_BINARY_OPERATOR(^, UShort);
425 IMPLEMENT_BINARY_OPERATOR(^, Short);
426 IMPLEMENT_BINARY_OPERATOR(^, UInt);
427 IMPLEMENT_BINARY_OPERATOR(^, Int);
428 IMPLEMENT_BINARY_OPERATOR(^, ULong);
429 IMPLEMENT_BINARY_OPERATOR(^, Long);
430 IMPLEMENT_BINARY_OPERATOR(^, Pointer);
432 cout << "Unhandled type for Xor instruction: " << Ty << "\n";
438 #define IMPLEMENT_SETCC(OP, TY) \
439 case Type::TY##TyID: Dest.BoolVal = Src1.TY##Val OP Src2.TY##Val; break
441 static GenericValue executeSetEQInst(GenericValue Src1, GenericValue Src2,
442 const Type *Ty, ExecutionContext &SF) {
444 switch (Ty->getPrimitiveID()) {
445 IMPLEMENT_SETCC(==, UByte);
446 IMPLEMENT_SETCC(==, SByte);
447 IMPLEMENT_SETCC(==, UShort);
448 IMPLEMENT_SETCC(==, Short);
449 IMPLEMENT_SETCC(==, UInt);
450 IMPLEMENT_SETCC(==, Int);
451 IMPLEMENT_SETCC(==, ULong);
452 IMPLEMENT_SETCC(==, Long);
453 IMPLEMENT_SETCC(==, Float);
454 IMPLEMENT_SETCC(==, Double);
455 IMPLEMENT_SETCC(==, Pointer);
457 cout << "Unhandled type for SetEQ instruction: " << Ty << "\n";
462 static GenericValue executeSetNEInst(GenericValue Src1, GenericValue Src2,
463 const Type *Ty, ExecutionContext &SF) {
465 switch (Ty->getPrimitiveID()) {
466 IMPLEMENT_SETCC(!=, UByte);
467 IMPLEMENT_SETCC(!=, SByte);
468 IMPLEMENT_SETCC(!=, UShort);
469 IMPLEMENT_SETCC(!=, Short);
470 IMPLEMENT_SETCC(!=, UInt);
471 IMPLEMENT_SETCC(!=, Int);
472 IMPLEMENT_SETCC(!=, ULong);
473 IMPLEMENT_SETCC(!=, Long);
474 IMPLEMENT_SETCC(!=, Float);
475 IMPLEMENT_SETCC(!=, Double);
476 IMPLEMENT_SETCC(!=, Pointer);
479 cout << "Unhandled type for SetNE instruction: " << Ty << "\n";
484 static GenericValue executeSetLEInst(GenericValue Src1, GenericValue Src2,
485 const Type *Ty, ExecutionContext &SF) {
487 switch (Ty->getPrimitiveID()) {
488 IMPLEMENT_SETCC(<=, UByte);
489 IMPLEMENT_SETCC(<=, SByte);
490 IMPLEMENT_SETCC(<=, UShort);
491 IMPLEMENT_SETCC(<=, Short);
492 IMPLEMENT_SETCC(<=, UInt);
493 IMPLEMENT_SETCC(<=, Int);
494 IMPLEMENT_SETCC(<=, ULong);
495 IMPLEMENT_SETCC(<=, Long);
496 IMPLEMENT_SETCC(<=, Float);
497 IMPLEMENT_SETCC(<=, Double);
498 IMPLEMENT_SETCC(<=, Pointer);
500 cout << "Unhandled type for SetLE instruction: " << Ty << "\n";
505 static GenericValue executeSetGEInst(GenericValue Src1, GenericValue Src2,
506 const Type *Ty, ExecutionContext &SF) {
508 switch (Ty->getPrimitiveID()) {
509 IMPLEMENT_SETCC(>=, UByte);
510 IMPLEMENT_SETCC(>=, SByte);
511 IMPLEMENT_SETCC(>=, UShort);
512 IMPLEMENT_SETCC(>=, Short);
513 IMPLEMENT_SETCC(>=, UInt);
514 IMPLEMENT_SETCC(>=, Int);
515 IMPLEMENT_SETCC(>=, ULong);
516 IMPLEMENT_SETCC(>=, Long);
517 IMPLEMENT_SETCC(>=, Float);
518 IMPLEMENT_SETCC(>=, Double);
519 IMPLEMENT_SETCC(>=, Pointer);
521 cout << "Unhandled type for SetGE instruction: " << Ty << "\n";
526 static GenericValue executeSetLTInst(GenericValue Src1, GenericValue Src2,
527 const Type *Ty, ExecutionContext &SF) {
529 switch (Ty->getPrimitiveID()) {
530 IMPLEMENT_SETCC(<, UByte);
531 IMPLEMENT_SETCC(<, SByte);
532 IMPLEMENT_SETCC(<, UShort);
533 IMPLEMENT_SETCC(<, Short);
534 IMPLEMENT_SETCC(<, UInt);
535 IMPLEMENT_SETCC(<, Int);
536 IMPLEMENT_SETCC(<, ULong);
537 IMPLEMENT_SETCC(<, Long);
538 IMPLEMENT_SETCC(<, Float);
539 IMPLEMENT_SETCC(<, Double);
540 IMPLEMENT_SETCC(<, Pointer);
542 cout << "Unhandled type for SetLT instruction: " << Ty << "\n";
547 static GenericValue executeSetGTInst(GenericValue Src1, GenericValue Src2,
548 const Type *Ty, ExecutionContext &SF) {
550 switch (Ty->getPrimitiveID()) {
551 IMPLEMENT_SETCC(>, UByte);
552 IMPLEMENT_SETCC(>, SByte);
553 IMPLEMENT_SETCC(>, UShort);
554 IMPLEMENT_SETCC(>, Short);
555 IMPLEMENT_SETCC(>, UInt);
556 IMPLEMENT_SETCC(>, Int);
557 IMPLEMENT_SETCC(>, ULong);
558 IMPLEMENT_SETCC(>, Long);
559 IMPLEMENT_SETCC(>, Float);
560 IMPLEMENT_SETCC(>, Double);
561 IMPLEMENT_SETCC(>, Pointer);
563 cout << "Unhandled type for SetGT instruction: " << Ty << "\n";
568 static void executeBinaryInst(BinaryOperator *I, ExecutionContext &SF) {
569 const Type *Ty = I->getOperand(0)->getType();
570 GenericValue Src1 = getOperandValue(I->getOperand(0), SF);
571 GenericValue Src2 = getOperandValue(I->getOperand(1), SF);
572 GenericValue R; // Result
574 switch (I->getOpcode()) {
575 case Instruction::Add: R = executeAddInst (Src1, Src2, Ty, SF); break;
576 case Instruction::Sub: R = executeSubInst (Src1, Src2, Ty, SF); break;
577 case Instruction::Mul: R = executeMulInst (Src1, Src2, Ty, SF); break;
578 case Instruction::Div: R = executeDivInst (Src1, Src2, Ty, SF); break;
579 case Instruction::Rem: R = executeRemInst (Src1, Src2, Ty, SF); break;
580 case Instruction::And: R = executeAndInst (Src1, Src2, Ty, SF); break;
581 case Instruction::Or: R = executeOrInst (Src1, Src2, Ty, SF); break;
582 case Instruction::Xor: R = executeXorInst (Src1, Src2, Ty, SF); break;
583 case Instruction::SetEQ: R = executeSetEQInst(Src1, Src2, Ty, SF); break;
584 case Instruction::SetNE: R = executeSetNEInst(Src1, Src2, Ty, SF); break;
585 case Instruction::SetLE: R = executeSetLEInst(Src1, Src2, Ty, SF); break;
586 case Instruction::SetGE: R = executeSetGEInst(Src1, Src2, Ty, SF); break;
587 case Instruction::SetLT: R = executeSetLTInst(Src1, Src2, Ty, SF); break;
588 case Instruction::SetGT: R = executeSetGTInst(Src1, Src2, Ty, SF); break;
590 cout << "Don't know how to handle this binary operator!\n-->" << I;
597 //===----------------------------------------------------------------------===//
598 // Terminator Instruction Implementations
599 //===----------------------------------------------------------------------===//
601 static void PerformExitStuff() {
602 #ifdef PROFILE_STRUCTURE_FIELDS
603 // Print out structure field accounting information...
604 if (!FieldAccessCounts.empty()) {
605 CW << "Profile Field Access Counts:\n";
606 std::map<const StructType *, vector<unsigned> >::iterator
607 I = FieldAccessCounts.begin(), E = FieldAccessCounts.end();
608 for (; I != E; ++I) {
609 vector<unsigned> &OfC = I->second;
610 CW << " '" << (Value*)I->first << "'\t- Sum=";
613 for (unsigned i = 0; i < OfC.size(); ++i)
617 for (unsigned i = 0; i < OfC.size(); ++i) {
625 CW << "Profile Field Access Percentages:\n";
627 for (I = FieldAccessCounts.begin(); I != E; ++I) {
628 vector<unsigned> &OfC = I->second;
630 for (unsigned i = 0; i < OfC.size(); ++i)
633 CW << " '" << (Value*)I->first << "'\t- ";
634 for (unsigned i = 0; i < OfC.size(); ++i) {
636 CW << double(OfC[i])/Sum;
642 FieldAccessCounts.clear();
647 void Interpreter::exitCalled(GenericValue GV) {
649 cout << "Program returned ";
650 print(Type::IntTy, GV);
651 cout << " via 'void exit(int)'\n";
654 ExitCode = GV.SByteVal;
659 void Interpreter::executeRetInst(ReturnInst *I, ExecutionContext &SF) {
660 const Type *RetTy = 0;
663 // Save away the return value... (if we are not 'ret void')
664 if (I->getNumOperands()) {
665 RetTy = I->getReturnValue()->getType();
666 Result = getOperandValue(I->getReturnValue(), SF);
669 // Save previously executing meth
670 const Function *M = ECStack.back().CurMethod;
672 // Pop the current stack frame... this invalidates SF
675 if (ECStack.empty()) { // Finished main. Put result into exit code...
676 if (RetTy) { // Nonvoid return type?
678 CW << "Function " << M->getType() << " \"" << M->getName()
680 print(RetTy, Result);
684 if (RetTy->isIntegral())
685 ExitCode = Result.SByteVal; // Capture the exit code of the program
694 // If we have a previous stack frame, and we have a previous call, fill in
695 // the return value...
697 ExecutionContext &NewSF = ECStack.back();
699 if (NewSF.Caller->getType() != Type::VoidTy) // Save result...
700 SetValue(NewSF.Caller, Result, NewSF);
702 NewSF.Caller = 0; // We returned from the call...
703 } else if (!QuietMode) {
704 // This must be a function that is executing because of a user 'call'
706 CW << "Function " << M->getType() << " \"" << M->getName()
708 print(RetTy, Result);
713 void Interpreter::executeBrInst(BranchInst *I, ExecutionContext &SF) {
714 SF.PrevBB = SF.CurBB; // Update PrevBB so that PHI nodes work...
717 Dest = I->getSuccessor(0); // Uncond branches have a fixed dest...
718 if (!I->isUnconditional()) {
719 Value *Cond = I->getCondition();
720 GenericValue CondVal = getOperandValue(Cond, SF);
721 if (CondVal.BoolVal == 0) // If false cond...
722 Dest = I->getSuccessor(1);
724 SF.CurBB = Dest; // Update CurBB to branch destination
725 SF.CurInst = SF.CurBB->begin(); // Update new instruction ptr...
728 //===----------------------------------------------------------------------===//
729 // Memory Instruction Implementations
730 //===----------------------------------------------------------------------===//
732 void Interpreter::executeAllocInst(AllocationInst *I, ExecutionContext &SF) {
733 const Type *Ty = I->getType()->getElementType(); // Type to be allocated
734 unsigned NumElements = 1;
736 // FIXME: Malloc/Alloca should always have an argument!
737 if (I->getNumOperands()) { // Allocating a unsized array type?
738 // Get the number of elements being allocated by the array...
739 GenericValue NumEl = getOperandValue(I->getOperand(0), SF);
740 NumElements = NumEl.UIntVal;
743 // Allocate enough memory to hold the type...
744 // FIXME: Don't use CALLOC, use a tainted malloc.
745 void *Memory = calloc(NumElements, TD.getTypeSize(Ty));
748 Result.PointerVal = (PointerTy)Memory;
749 assert(Result.PointerVal != 0 && "Null pointer returned by malloc!");
750 SetValue(I, Result, SF);
752 if (I->getOpcode() == Instruction::Alloca)
753 ECStack.back().Allocas.add(Memory);
756 static void executeFreeInst(FreeInst *I, ExecutionContext &SF) {
757 assert(I->getOperand(0)->getType()->isPointerType() && "Freeing nonptr?");
758 GenericValue Value = getOperandValue(I->getOperand(0), SF);
759 // TODO: Check to make sure memory is allocated
760 free((void*)Value.PointerVal); // Free memory
764 // getElementOffset - The workhorse for getelementptr, load and store. This
765 // function returns the offset that arguments ArgOff+1 -> NumArgs specify for
766 // the pointer type specified by argument Arg.
768 static PointerTy getElementOffset(MemAccessInst *I, ExecutionContext &SF) {
769 assert(isa<PointerType>(I->getPointerOperand()->getType()) &&
770 "Cannot getElementOffset of a nonpointer type!");
773 const Type *Ty = I->getPointerOperand()->getType();
775 unsigned ArgOff = I->getFirstIndexOperandNumber();
776 while (ArgOff < I->getNumOperands()) {
777 if (const StructType *STy = dyn_cast<StructType>(Ty)) {
778 const StructLayout *SLO = TD.getStructLayout(STy);
780 // Indicies must be ubyte constants...
781 const ConstantUInt *CPU = cast<ConstantUInt>(I->getOperand(ArgOff++));
782 assert(CPU->getType() == Type::UByteTy);
783 unsigned Index = CPU->getValue();
785 #ifdef PROFILE_STRUCTURE_FIELDS
786 if (ProfileStructureFields) {
787 // Do accounting for this field...
788 vector<unsigned> &OfC = FieldAccessCounts[STy];
789 if (OfC.size() == 0) OfC.resize(STy->getElementTypes().size());
794 Total += SLO->MemberOffsets[Index];
795 Ty = STy->getElementTypes()[Index];
796 } else if (const SequentialType *ST = cast<SequentialType>(Ty)) {
798 // Get the index number for the array... which must be uint type...
799 assert(I->getOperand(ArgOff)->getType() == Type::UIntTy);
800 unsigned Idx = getOperandValue(I->getOperand(ArgOff++), SF).UIntVal;
801 if (const ArrayType *AT = dyn_cast<ArrayType>(ST))
802 if (Idx >= AT->getNumElements() && ArrayChecksEnabled) {
803 cerr << "Out of range memory access to element #" << Idx
804 << " of a " << AT->getNumElements() << " element array."
805 << " Subscript #" << (ArgOff-I->getFirstIndexOperandNumber())
808 siglongjmp(SignalRecoverBuffer, SIGTRAP);
811 Ty = ST->getElementType();
812 unsigned Size = TD.getTypeSize(Ty);
820 static void executeGEPInst(GetElementPtrInst *I, ExecutionContext &SF) {
821 GenericValue SRC = getOperandValue(I->getPointerOperand(), SF);
822 PointerTy SrcPtr = SRC.PointerVal;
825 Result.PointerVal = SrcPtr + getElementOffset(I, SF);
826 SetValue(I, Result, SF);
829 static void executeLoadInst(LoadInst *I, ExecutionContext &SF) {
830 GenericValue SRC = getOperandValue(I->getPointerOperand(), SF);
831 PointerTy SrcPtr = SRC.PointerVal;
832 PointerTy Offset = getElementOffset(I, SF); // Handle any structure indices
835 GenericValue *Ptr = (GenericValue*)SrcPtr;
838 switch (I->getType()->getPrimitiveID()) {
840 case Type::UByteTyID:
841 case Type::SByteTyID: Result.SByteVal = Ptr->SByteVal; break;
842 case Type::UShortTyID:
843 case Type::ShortTyID: Result.ShortVal = Ptr->ShortVal; break;
845 case Type::IntTyID: Result.IntVal = Ptr->IntVal; break;
846 case Type::ULongTyID:
847 case Type::LongTyID: Result.ULongVal = Ptr->ULongVal; break;
848 case Type::PointerTyID: Result.PointerVal = Ptr->PointerVal; break;
849 case Type::FloatTyID: Result.FloatVal = Ptr->FloatVal; break;
850 case Type::DoubleTyID: Result.DoubleVal = Ptr->DoubleVal; break;
852 cout << "Cannot load value of type " << I->getType() << "!\n";
855 SetValue(I, Result, SF);
858 static void executeStoreInst(StoreInst *I, ExecutionContext &SF) {
859 GenericValue SRC = getOperandValue(I->getPointerOperand(), SF);
860 PointerTy SrcPtr = SRC.PointerVal;
861 SrcPtr += getElementOffset(I, SF); // Handle any structure indices
863 GenericValue *Ptr = (GenericValue *)SrcPtr;
864 GenericValue Val = getOperandValue(I->getOperand(0), SF);
866 switch (I->getOperand(0)->getType()->getPrimitiveID()) {
868 case Type::UByteTyID:
869 case Type::SByteTyID: Ptr->SByteVal = Val.SByteVal; break;
870 case Type::UShortTyID:
871 case Type::ShortTyID: Ptr->ShortVal = Val.ShortVal; break;
873 case Type::IntTyID: Ptr->IntVal = Val.IntVal; break;
874 case Type::ULongTyID:
875 case Type::LongTyID: Ptr->LongVal = Val.LongVal; break;
876 case Type::PointerTyID: Ptr->PointerVal = Val.PointerVal; break;
877 case Type::FloatTyID: Ptr->FloatVal = Val.FloatVal; break;
878 case Type::DoubleTyID: Ptr->DoubleVal = Val.DoubleVal; break;
880 cout << "Cannot store value of type " << I->getType() << "!\n";
885 //===----------------------------------------------------------------------===//
886 // Miscellaneous Instruction Implementations
887 //===----------------------------------------------------------------------===//
889 void Interpreter::executeCallInst(CallInst *I, ExecutionContext &SF) {
890 ECStack.back().Caller = I;
891 vector<GenericValue> ArgVals;
892 ArgVals.reserve(I->getNumOperands()-1);
893 for (unsigned i = 1; i < I->getNumOperands(); ++i)
894 ArgVals.push_back(getOperandValue(I->getOperand(i), SF));
896 // To handle indirect calls, we must get the pointer value from the argument
897 // and treat it as a function pointer.
898 GenericValue SRC = getOperandValue(I->getCalledValue(), SF);
900 callMethod((Function*)SRC.PointerVal, ArgVals);
903 static void executePHINode(PHINode *I, ExecutionContext &SF) {
904 BasicBlock *PrevBB = SF.PrevBB;
905 Value *IncomingValue = 0;
907 // Search for the value corresponding to this previous bb...
908 for (unsigned i = I->getNumIncomingValues(); i > 0;) {
909 if (I->getIncomingBlock(--i) == PrevBB) {
910 IncomingValue = I->getIncomingValue(i);
914 assert(IncomingValue && "No PHI node predecessor for current PrevBB!");
916 // Found the value, set as the result...
917 SetValue(I, getOperandValue(IncomingValue, SF), SF);
920 #define IMPLEMENT_SHIFT(OP, TY) \
921 case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.UByteVal; break
923 static void executeShlInst(ShiftInst *I, ExecutionContext &SF) {
924 const Type *Ty = I->getOperand(0)->getType();
925 GenericValue Src1 = getOperandValue(I->getOperand(0), SF);
926 GenericValue Src2 = getOperandValue(I->getOperand(1), SF);
929 switch (Ty->getPrimitiveID()) {
930 IMPLEMENT_SHIFT(<<, UByte);
931 IMPLEMENT_SHIFT(<<, SByte);
932 IMPLEMENT_SHIFT(<<, UShort);
933 IMPLEMENT_SHIFT(<<, Short);
934 IMPLEMENT_SHIFT(<<, UInt);
935 IMPLEMENT_SHIFT(<<, Int);
936 IMPLEMENT_SHIFT(<<, ULong);
937 IMPLEMENT_SHIFT(<<, Long);
939 cout << "Unhandled type for Shl instruction: " << Ty << "\n";
941 SetValue(I, Dest, SF);
944 static void executeShrInst(ShiftInst *I, ExecutionContext &SF) {
945 const Type *Ty = I->getOperand(0)->getType();
946 GenericValue Src1 = getOperandValue(I->getOperand(0), SF);
947 GenericValue Src2 = getOperandValue(I->getOperand(1), SF);
950 switch (Ty->getPrimitiveID()) {
951 IMPLEMENT_SHIFT(>>, UByte);
952 IMPLEMENT_SHIFT(>>, SByte);
953 IMPLEMENT_SHIFT(>>, UShort);
954 IMPLEMENT_SHIFT(>>, Short);
955 IMPLEMENT_SHIFT(>>, UInt);
956 IMPLEMENT_SHIFT(>>, Int);
957 IMPLEMENT_SHIFT(>>, ULong);
958 IMPLEMENT_SHIFT(>>, Long);
960 cout << "Unhandled type for Shr instruction: " << Ty << "\n";
962 SetValue(I, Dest, SF);
965 #define IMPLEMENT_CAST(DTY, DCTY, STY) \
966 case Type::STY##TyID: Dest.DTY##Val = DCTY Src.STY##Val; break;
968 #define IMPLEMENT_CAST_CASE_START(DESTTY, DESTCTY) \
969 case Type::DESTTY##TyID: \
970 switch (SrcTy->getPrimitiveID()) { \
971 IMPLEMENT_CAST(DESTTY, DESTCTY, UByte); \
972 IMPLEMENT_CAST(DESTTY, DESTCTY, SByte); \
973 IMPLEMENT_CAST(DESTTY, DESTCTY, UShort); \
974 IMPLEMENT_CAST(DESTTY, DESTCTY, Short); \
975 IMPLEMENT_CAST(DESTTY, DESTCTY, UInt); \
976 IMPLEMENT_CAST(DESTTY, DESTCTY, Int); \
977 IMPLEMENT_CAST(DESTTY, DESTCTY, ULong); \
978 IMPLEMENT_CAST(DESTTY, DESTCTY, Long); \
979 IMPLEMENT_CAST(DESTTY, DESTCTY, Pointer);
981 #define IMPLEMENT_CAST_CASE_FP_IMP(DESTTY, DESTCTY) \
982 IMPLEMENT_CAST(DESTTY, DESTCTY, Float); \
983 IMPLEMENT_CAST(DESTTY, DESTCTY, Double)
985 #define IMPLEMENT_CAST_CASE_END() \
986 default: cout << "Unhandled cast: " << SrcTy << " to " << Ty << "\n"; \
991 #define IMPLEMENT_CAST_CASE(DESTTY, DESTCTY) \
992 IMPLEMENT_CAST_CASE_START(DESTTY, DESTCTY); \
993 IMPLEMENT_CAST_CASE_FP_IMP(DESTTY, DESTCTY); \
994 IMPLEMENT_CAST_CASE_END()
996 static void executeCastInst(CastInst *I, ExecutionContext &SF) {
997 const Type *Ty = I->getType();
998 const Type *SrcTy = I->getOperand(0)->getType();
999 GenericValue Src = getOperandValue(I->getOperand(0), SF);
1002 switch (Ty->getPrimitiveID()) {
1003 IMPLEMENT_CAST_CASE(UByte , (unsigned char));
1004 IMPLEMENT_CAST_CASE(SByte , ( signed char));
1005 IMPLEMENT_CAST_CASE(UShort , (unsigned short));
1006 IMPLEMENT_CAST_CASE(Short , ( signed char));
1007 IMPLEMENT_CAST_CASE(UInt , (unsigned int ));
1008 IMPLEMENT_CAST_CASE(Int , ( signed int ));
1009 IMPLEMENT_CAST_CASE(ULong , (uint64_t));
1010 IMPLEMENT_CAST_CASE(Long , ( int64_t));
1011 IMPLEMENT_CAST_CASE(Pointer, (PointerTy)(uint32_t));
1012 IMPLEMENT_CAST_CASE(Float , (float));
1013 IMPLEMENT_CAST_CASE(Double , (double));
1015 cout << "Unhandled dest type for cast instruction: " << Ty << "\n";
1017 SetValue(I, Dest, SF);
1023 //===----------------------------------------------------------------------===//
1024 // Dispatch and Execution Code
1025 //===----------------------------------------------------------------------===//
1027 MethodInfo::MethodInfo(Function *M) : Annotation(MethodInfoAID) {
1028 // Assign slot numbers to the function arguments...
1029 const Function::ArgumentListType &ArgList = M->getArgumentList();
1030 for (Function::ArgumentListType::const_iterator AI = ArgList.begin(),
1031 AE = ArgList.end(); AI != AE; ++AI)
1032 (*AI)->addAnnotation(new SlotNumber(getValueSlot(*AI)));
1034 // Iterate over all of the instructions...
1035 unsigned InstNum = 0;
1036 for (Function::iterator MI = M->begin(), ME = M->end(); MI != ME; ++MI) {
1037 BasicBlock *BB = *MI;
1038 for (BasicBlock::iterator II = BB->begin(), IE = BB->end(); II != IE; ++II){
1039 Instruction *I = *II; // For each instruction... Add Annote
1040 I->addAnnotation(new InstNumber(++InstNum, getValueSlot(I)));
1045 unsigned MethodInfo::getValueSlot(const Value *V) {
1046 unsigned Plane = V->getType()->getUniqueID();
1047 if (Plane >= NumPlaneElements.size())
1048 NumPlaneElements.resize(Plane+1, 0);
1049 return NumPlaneElements[Plane]++;
1053 //===----------------------------------------------------------------------===//
1054 // callMethod - Execute the specified function...
1056 void Interpreter::callMethod(Function *M, const vector<GenericValue> &ArgVals) {
1057 assert((ECStack.empty() || ECStack.back().Caller == 0 ||
1058 ECStack.back().Caller->getNumOperands()-1 == ArgVals.size()) &&
1059 "Incorrect number of arguments passed into function call!");
1060 if (M->isExternal()) {
1061 GenericValue Result = callExternalMethod(M, ArgVals);
1062 const Type *RetTy = M->getReturnType();
1064 // Copy the result back into the result variable if we are not returning
1066 if (RetTy != Type::VoidTy) {
1067 if (!ECStack.empty() && ECStack.back().Caller) {
1068 ExecutionContext &SF = ECStack.back();
1069 SetValue(SF.Caller, Result, SF);
1071 SF.Caller = 0; // We returned from the call...
1072 } else if (!QuietMode) {
1074 CW << "Function " << M->getType() << " \"" << M->getName()
1076 print(RetTy, Result);
1079 if (RetTy->isIntegral())
1080 ExitCode = Result.SByteVal; // Capture the exit code of the program
1087 // Process the function, assigning instruction numbers to the instructions in
1088 // the function. Also calculate the number of values for each type slot
1091 MethodInfo *MethInfo = (MethodInfo*)M->getOrCreateAnnotation(MethodInfoAID);
1092 ECStack.push_back(ExecutionContext()); // Make a new stack frame...
1094 ExecutionContext &StackFrame = ECStack.back(); // Fill it in...
1095 StackFrame.CurMethod = M;
1096 StackFrame.CurBB = M->front();
1097 StackFrame.CurInst = StackFrame.CurBB->begin();
1098 StackFrame.MethInfo = MethInfo;
1100 // Initialize the values to nothing...
1101 StackFrame.Values.resize(MethInfo->NumPlaneElements.size());
1102 for (unsigned i = 0; i < MethInfo->NumPlaneElements.size(); ++i) {
1103 StackFrame.Values[i].resize(MethInfo->NumPlaneElements[i]);
1105 // Taint the initial values of stuff
1106 memset(&StackFrame.Values[i][0], 42,
1107 MethInfo->NumPlaneElements[i]*sizeof(GenericValue));
1110 StackFrame.PrevBB = 0; // No previous BB for PHI nodes...
1113 // Run through the function arguments and initialize their values...
1114 assert(ArgVals.size() == M->getArgumentList().size() &&
1115 "Invalid number of values passed to function invocation!");
1117 for (Function::ArgumentListType::iterator MI = M->getArgumentList().begin(),
1118 ME = M->getArgumentList().end(); MI != ME; ++MI, ++i) {
1119 SetValue(*MI, ArgVals[i], StackFrame);
1123 // executeInstruction - Interpret a single instruction, increment the "PC", and
1124 // return true if the next instruction is a breakpoint...
1126 bool Interpreter::executeInstruction() {
1127 assert(!ECStack.empty() && "No program running, cannot execute inst!");
1129 ExecutionContext &SF = ECStack.back(); // Current stack frame
1130 Instruction *I = *SF.CurInst++; // Increment before execute
1135 // Set a sigsetjmp buffer so that we can recover if an error happens during
1136 // instruction execution...
1138 if (int SigNo = sigsetjmp(SignalRecoverBuffer, 1)) {
1139 --SF.CurInst; // Back up to erroring instruction
1140 if (SigNo != SIGINT) {
1141 cout << "EXCEPTION OCCURRED [" << _sys_siglistp[SigNo] << "]:\n";
1143 // If -abort-on-exception was specified, terminate LLI instead of trying
1146 if (AbortOnExceptions) exit(1);
1147 } else if (SigNo == SIGINT) {
1148 cout << "CTRL-C Detected, execution halted.\n";
1150 InInstruction = false;
1154 InInstruction = true;
1155 if (I->isBinaryOp()) {
1156 executeBinaryInst(cast<BinaryOperator>(I), SF);
1158 switch (I->getOpcode()) {
1160 case Instruction::Ret: executeRetInst (cast<ReturnInst>(I), SF); break;
1161 case Instruction::Br: executeBrInst (cast<BranchInst>(I), SF); break;
1162 // Memory Instructions
1163 case Instruction::Alloca:
1164 case Instruction::Malloc: executeAllocInst((AllocationInst*)I, SF); break;
1165 case Instruction::Free: executeFreeInst (cast<FreeInst> (I), SF); break;
1166 case Instruction::Load: executeLoadInst (cast<LoadInst> (I), SF); break;
1167 case Instruction::Store: executeStoreInst(cast<StoreInst>(I), SF); break;
1168 case Instruction::GetElementPtr:
1169 executeGEPInst(cast<GetElementPtrInst>(I), SF); break;
1171 // Miscellaneous Instructions
1172 case Instruction::Call: executeCallInst (cast<CallInst> (I), SF); break;
1173 case Instruction::PHINode: executePHINode (cast<PHINode> (I), SF); break;
1174 case Instruction::Shl: executeShlInst (cast<ShiftInst>(I), SF); break;
1175 case Instruction::Shr: executeShrInst (cast<ShiftInst>(I), SF); break;
1176 case Instruction::Cast: executeCastInst (cast<CastInst> (I), SF); break;
1178 cout << "Don't know how to execute this instruction!\n-->" << I;
1181 InInstruction = false;
1183 // Reset the current frame location to the top of stack
1184 CurFrame = ECStack.size()-1;
1186 if (CurFrame == -1) return false; // No breakpoint if no code
1188 // Return true if there is a breakpoint annotation on the instruction...
1189 return (*ECStack[CurFrame].CurInst)->getAnnotation(BreakpointAID) != 0;
1192 void Interpreter::stepInstruction() { // Do the 'step' command
1193 if (ECStack.empty()) {
1194 cout << "Error: no program running, cannot step!\n";
1198 // Run an instruction...
1199 executeInstruction();
1201 // Print the next instruction to execute...
1202 printCurrentInstruction();
1206 void Interpreter::nextInstruction() { // Do the 'next' command
1207 if (ECStack.empty()) {
1208 cout << "Error: no program running, cannot 'next'!\n";
1212 // If this is a call instruction, step over the call instruction...
1213 // TODO: ICALL, CALL WITH, ...
1214 if ((*ECStack.back().CurInst)->getOpcode() == Instruction::Call) {
1215 unsigned StackSize = ECStack.size();
1216 // Step into the function...
1217 if (executeInstruction()) {
1218 // Hit a breakpoint, print current instruction, then return to user...
1219 cout << "Breakpoint hit!\n";
1220 printCurrentInstruction();
1224 // If we we able to step into the function, finish it now. We might not be
1225 // able the step into a function, if it's external for example.
1226 if (ECStack.size() != StackSize)
1227 finish(); // Finish executing the function...
1229 printCurrentInstruction();
1232 // Normal instruction, just step...
1237 void Interpreter::run() {
1238 if (ECStack.empty()) {
1239 cout << "Error: no program running, cannot run!\n";
1243 bool HitBreakpoint = false;
1244 while (!ECStack.empty() && !HitBreakpoint) {
1245 // Run an instruction...
1246 HitBreakpoint = executeInstruction();
1249 if (HitBreakpoint) {
1250 cout << "Breakpoint hit!\n";
1252 // Print the next instruction to execute...
1253 printCurrentInstruction();
1256 void Interpreter::finish() {
1257 if (ECStack.empty()) {
1258 cout << "Error: no program running, cannot run!\n";
1262 unsigned StackSize = ECStack.size();
1263 bool HitBreakpoint = false;
1264 while (ECStack.size() >= StackSize && !HitBreakpoint) {
1265 // Run an instruction...
1266 HitBreakpoint = executeInstruction();
1269 if (HitBreakpoint) {
1270 cout << "Breakpoint hit!\n";
1273 // Print the next instruction to execute...
1274 printCurrentInstruction();
1279 // printCurrentInstruction - Print out the instruction that the virtual PC is
1280 // at, or fail silently if no program is running.
1282 void Interpreter::printCurrentInstruction() {
1283 if (!ECStack.empty()) {
1284 if (ECStack.back().CurBB->begin() == ECStack.back().CurInst) // print label
1285 WriteAsOperand(cout, ECStack.back().CurBB) << ":\n";
1287 Instruction *I = *ECStack.back().CurInst;
1288 InstNumber *IN = (InstNumber*)I->getAnnotation(SlotNumberAID);
1289 assert(IN && "Instruction has no numbering annotation!");
1290 cout << "#" << IN->InstNum << I;
1294 void Interpreter::printValue(const Type *Ty, GenericValue V) {
1295 switch (Ty->getPrimitiveID()) {
1296 case Type::BoolTyID: cout << (V.BoolVal?"true":"false"); break;
1297 case Type::SByteTyID: cout << V.SByteVal; break;
1298 case Type::UByteTyID: cout << V.UByteVal; break;
1299 case Type::ShortTyID: cout << V.ShortVal; break;
1300 case Type::UShortTyID: cout << V.UShortVal; break;
1301 case Type::IntTyID: cout << V.IntVal; break;
1302 case Type::UIntTyID: cout << V.UIntVal; break;
1303 case Type::LongTyID: cout << (long)V.LongVal; break;
1304 case Type::ULongTyID: cout << (unsigned long)V.ULongVal; break;
1305 case Type::FloatTyID: cout << V.FloatVal; break;
1306 case Type::DoubleTyID: cout << V.DoubleVal; break;
1307 case Type::PointerTyID:cout << (void*)V.PointerVal; break;
1309 cout << "- Don't know how to print value of this type!";
1314 void Interpreter::print(const Type *Ty, GenericValue V) {
1319 void Interpreter::print(const std::string &Name) {
1320 Value *PickedVal = ChooseOneOption(Name, LookupMatchingNames(Name));
1321 if (!PickedVal) return;
1323 if (const Function *F = dyn_cast<const Function>(PickedVal)) {
1324 CW << F; // Print the function
1325 } else if (const Type *Ty = dyn_cast<const Type>(PickedVal)) {
1326 CW << "type %" << Name << " = " << Ty->getDescription() << "\n";
1327 } else if (const BasicBlock *BB = dyn_cast<const BasicBlock>(PickedVal)) {
1328 CW << BB; // Print the basic block
1329 } else { // Otherwise there should be an annotation for the slot#
1330 print(PickedVal->getType(),
1331 getOperandValue(PickedVal, ECStack[CurFrame]));
1336 void Interpreter::infoValue(const std::string &Name) {
1337 Value *PickedVal = ChooseOneOption(Name, LookupMatchingNames(Name));
1338 if (!PickedVal) return;
1341 print(PickedVal->getType(),
1342 getOperandValue(PickedVal, ECStack[CurFrame]));
1344 printOperandInfo(PickedVal, ECStack[CurFrame]);
1347 // printStackFrame - Print information about the specified stack frame, or -1
1348 // for the default one.
1350 void Interpreter::printStackFrame(int FrameNo = -1) {
1351 if (FrameNo == -1) FrameNo = CurFrame;
1352 Function *Func = ECStack[FrameNo].CurMethod;
1353 const Type *RetTy = Func->getReturnType();
1355 CW << ((FrameNo == CurFrame) ? '>' : '-') << "#" << FrameNo << ". "
1356 << (Value*)RetTy << " \"" << Func->getName() << "\"(";
1358 Function::ArgumentListType &Args = Func->getArgumentList();
1359 for (unsigned i = 0; i < Args.size(); ++i) {
1360 if (i != 0) cout << ", ";
1361 CW << (Value*)Args[i] << "=";
1363 printValue(Args[i]->getType(), getOperandValue(Args[i], ECStack[FrameNo]));
1367 CW << *(ECStack[FrameNo].CurInst-(FrameNo != int(ECStack.size()-1)));