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/ConstPoolVals.h"
15 #include "llvm/Assembly/Writer.h"
16 #include "llvm/Target/TargetData.h"
17 #include "llvm/GlobalVariable.h"
18 #include <math.h> // For fmod
22 // Create a TargetData structure to handle memory addressing and size/alignment
25 static TargetData TD("lli Interpreter");
26 CachedWriter CW; // Object to accelerate printing of LLVM
29 #ifdef PROFILE_STRUCTURE_FIELDS
30 #include "Support/CommandLine.h"
31 static cl::Flag ProfileStructureFields("profilestructfields",
32 "Profile Structure Field Accesses");
34 static map<const StructType *, vector<unsigned> > FieldAccessCounts;
37 sigjmp_buf SignalRecoverBuffer;
38 static bool InInstruction = false;
41 static void SigHandler(int Signal) {
43 siglongjmp(SignalRecoverBuffer, Signal);
47 static void initializeSignalHandlers() {
48 struct sigaction Action;
49 Action.sa_handler = SigHandler;
50 Action.sa_flags = SA_SIGINFO;
51 sigemptyset(&Action.sa_mask);
52 sigaction(SIGSEGV, &Action, 0);
53 sigaction(SIGBUS, &Action, 0);
54 sigaction(SIGINT, &Action, 0);
55 sigaction(SIGFPE, &Action, 0);
59 //===----------------------------------------------------------------------===//
60 // Value Manipulation code
61 //===----------------------------------------------------------------------===//
63 static unsigned getOperandSlot(Value *V) {
64 SlotNumber *SN = (SlotNumber*)V->getAnnotation(SlotNumberAID);
65 assert(SN && "Operand does not have a slot number annotation!");
69 #define GET_CONST_VAL(TY, CLASS) \
70 case Type::TY##TyID: Result.TY##Val = cast<CLASS>(CPV)->getValue(); break
72 static GenericValue getOperandValue(Value *V, ExecutionContext &SF) {
73 if (ConstPoolVal *CPV = dyn_cast<ConstPoolVal>(V)) {
75 switch (CPV->getType()->getPrimitiveID()) {
76 GET_CONST_VAL(Bool , ConstPoolBool);
77 GET_CONST_VAL(UByte , ConstPoolUInt);
78 GET_CONST_VAL(SByte , ConstPoolSInt);
79 GET_CONST_VAL(UShort , ConstPoolUInt);
80 GET_CONST_VAL(Short , ConstPoolSInt);
81 GET_CONST_VAL(UInt , ConstPoolUInt);
82 GET_CONST_VAL(Int , ConstPoolSInt);
83 GET_CONST_VAL(ULong , ConstPoolUInt);
84 GET_CONST_VAL(Long , ConstPoolSInt);
85 GET_CONST_VAL(Float , ConstPoolFP);
86 GET_CONST_VAL(Double , ConstPoolFP);
87 case Type::PointerTyID:
88 if (isa<ConstPoolPointerNull>(CPV)) {
89 Result.PointerVal = 0;
90 } else if (ConstPoolPointerRef *CPR =dyn_cast<ConstPoolPointerRef>(CPV)) {
91 assert(0 && "Not implemented!");
93 assert(0 && "Unknown constant pointer type!");
97 cout << "ERROR: Constant unimp for type: " << CPV->getType() << endl;
100 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
101 GlobalAddress *Address =
102 (GlobalAddress*)GV->getOrCreateAnnotation(GlobalAddressAID);
104 Result.PointerVal = (PointerTy)(GenericValue*)Address->Ptr;
107 unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
108 unsigned OpSlot = getOperandSlot(V);
109 assert(TyP < SF.Values.size() &&
110 OpSlot < SF.Values[TyP].size() && "Value out of range!");
111 return SF.Values[TyP][getOperandSlot(V)];
115 static void printOperandInfo(Value *V, ExecutionContext &SF) {
116 if (isa<ConstPoolVal>(V)) {
117 cout << "Constant Pool Value\n";
118 } else if (isa<GlobalValue>(V)) {
119 cout << "Global Value\n";
121 unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
122 unsigned Slot = getOperandSlot(V);
123 cout << "Value=" << (void*)V << " TypeID=" << TyP << " Slot=" << Slot
124 << " Addr=" << &SF.Values[TyP][Slot] << " SF=" << &SF
127 const unsigned char *Buf = (const unsigned char*)&SF.Values[TyP][Slot];
128 for (unsigned i = 0; i < sizeof(GenericValue); ++i) {
129 unsigned char Cur = Buf[i];
130 cout << ( Cur >= 160? char((Cur>>4)+'A'-10) : char((Cur>>4) + '0'))
131 << ((Cur&15) >= 10? char((Cur&15)+'A'-10) : char((Cur&15) + '0'));
139 static void SetValue(Value *V, GenericValue Val, ExecutionContext &SF) {
140 unsigned TyP = V->getType()->getUniqueID(); // TypePlane for value
142 //cout << "Setting value: " << &SF.Values[TyP][getOperandSlot(V)] << endl;
143 SF.Values[TyP][getOperandSlot(V)] = Val;
147 //===----------------------------------------------------------------------===//
148 // Annotation Wrangling code
149 //===----------------------------------------------------------------------===//
151 void Interpreter::initializeExecutionEngine() {
152 AnnotationManager::registerAnnotationFactory(MethodInfoAID,
153 &MethodInfo::Create);
154 AnnotationManager::registerAnnotationFactory(GlobalAddressAID,
155 &GlobalAddress::Create);
156 initializeSignalHandlers();
159 // InitializeMemory - Recursive function to apply a ConstPool value into the
160 // specified memory location...
162 static void InitializeMemory(ConstPoolVal *Init, char *Addr) {
163 #define INITIALIZE_MEMORY(TYID, CLASS, TY) \
164 case Type::TYID##TyID: { \
165 TY Tmp = cast<CLASS>(Init)->getValue(); \
166 memcpy(Addr, &Tmp, sizeof(TY)); \
169 switch (Init->getType()->getPrimitiveID()) {
170 INITIALIZE_MEMORY(Bool , ConstPoolBool, bool);
171 INITIALIZE_MEMORY(UByte , ConstPoolUInt, unsigned char);
172 INITIALIZE_MEMORY(SByte , ConstPoolSInt, signed char);
173 INITIALIZE_MEMORY(UShort , ConstPoolUInt, unsigned short);
174 INITIALIZE_MEMORY(Short , ConstPoolSInt, signed short);
175 INITIALIZE_MEMORY(UInt , ConstPoolUInt, unsigned int);
176 INITIALIZE_MEMORY(Int , ConstPoolSInt, signed int);
177 INITIALIZE_MEMORY(ULong , ConstPoolUInt, uint64_t);
178 INITIALIZE_MEMORY(Long , ConstPoolSInt, int64_t);
179 INITIALIZE_MEMORY(Float , ConstPoolFP , float);
180 INITIALIZE_MEMORY(Double , ConstPoolFP , double);
181 #undef INITIALIZE_MEMORY
183 case Type::ArrayTyID: {
184 ConstPoolArray *CPA = cast<ConstPoolArray>(Init);
185 const vector<Use> &Val = CPA->getValues();
186 unsigned ElementSize =
187 TD.getTypeSize(cast<ArrayType>(CPA->getType())->getElementType());
188 for (unsigned i = 0; i < Val.size(); ++i)
189 InitializeMemory(cast<ConstPoolVal>(Val[i].get()), Addr+i*ElementSize);
193 case Type::StructTyID: {
194 ConstPoolStruct *CPS = cast<ConstPoolStruct>(Init);
195 const StructLayout *SL=TD.getStructLayout(cast<StructType>(CPS->getType()));
196 const vector<Use> &Val = CPS->getValues();
197 for (unsigned i = 0; i < Val.size(); ++i)
198 InitializeMemory(cast<ConstPoolVal>(Val[i].get()),
199 Addr+SL->MemberOffsets[i]);
203 case Type::PointerTyID:
204 if (isa<ConstPoolPointerNull>(Init)) {
206 } else if (ConstPoolPointerRef *CPR = dyn_cast<ConstPoolPointerRef>(Init)) {
207 GlobalAddress *Address =
208 (GlobalAddress*)CPR->getValue()->getOrCreateAnnotation(GlobalAddressAID);
209 *(void**)Addr = (GenericValue*)Address->Ptr;
211 assert(0 && "Unknown Constant pointer type!");
216 CW << "Bad Type: " << Init->getType() << endl;
217 assert(0 && "Unknown constant type to initialize memory with!");
221 Annotation *GlobalAddress::Create(AnnotationID AID, const Annotable *O, void *){
222 assert(AID == GlobalAddressAID);
224 // This annotation will only be created on GlobalValue objects...
225 GlobalValue *GVal = cast<GlobalValue>((Value*)O);
227 if (isa<Method>(GVal)) {
228 // The GlobalAddress object for a method is just a pointer to method itself.
229 // Don't delete it when the annotation is gone though!
230 return new GlobalAddress(GVal, false);
233 // Handle the case of a global variable...
234 assert(isa<GlobalVariable>(GVal) &&
235 "Global value found that isn't a method or global variable!");
236 GlobalVariable *GV = cast<GlobalVariable>(GVal);
238 // First off, we must allocate space for the global variable to point at...
239 const Type *Ty = GV->getType()->getValueType(); // Type to be allocated
240 unsigned NumElements = 1;
242 if (isa<ArrayType>(Ty) && cast<ArrayType>(Ty)->isUnsized()) {
243 assert(GV->hasInitializer() && "Const val must have an initializer!");
244 // Allocating a unsized array type?
245 Ty = cast<const ArrayType>(Ty)->getElementType(); // Get the actual type...
247 // Get the number of elements being allocated by the array...
248 NumElements =cast<ConstPoolArray>(GV->getInitializer())->getValues().size();
251 // Allocate enough memory to hold the type...
252 void *Addr = calloc(NumElements, TD.getTypeSize(Ty));
253 assert(Addr != 0 && "Null pointer returned by malloc!");
255 // Initialize the memory if there is an initializer...
256 if (GV->hasInitializer())
257 InitializeMemory(GV->getInitializer(), (char*)Addr);
259 return new GlobalAddress(Addr, true); // Simply invoke the ctor
263 //===----------------------------------------------------------------------===//
264 // Binary Instruction Implementations
265 //===----------------------------------------------------------------------===//
267 #define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
268 case Type::TY##TyID: Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; break
270 static GenericValue executeAddInst(GenericValue Src1, GenericValue Src2,
271 const Type *Ty, ExecutionContext &SF) {
273 switch (Ty->getPrimitiveID()) {
274 IMPLEMENT_BINARY_OPERATOR(+, UByte);
275 IMPLEMENT_BINARY_OPERATOR(+, SByte);
276 IMPLEMENT_BINARY_OPERATOR(+, UShort);
277 IMPLEMENT_BINARY_OPERATOR(+, Short);
278 IMPLEMENT_BINARY_OPERATOR(+, UInt);
279 IMPLEMENT_BINARY_OPERATOR(+, Int);
280 IMPLEMENT_BINARY_OPERATOR(+, ULong);
281 IMPLEMENT_BINARY_OPERATOR(+, Long);
282 IMPLEMENT_BINARY_OPERATOR(+, Float);
283 IMPLEMENT_BINARY_OPERATOR(+, Double);
284 IMPLEMENT_BINARY_OPERATOR(+, Pointer);
286 cout << "Unhandled type for Add instruction: " << Ty << endl;
291 static GenericValue executeSubInst(GenericValue Src1, GenericValue Src2,
292 const Type *Ty, ExecutionContext &SF) {
294 switch (Ty->getPrimitiveID()) {
295 IMPLEMENT_BINARY_OPERATOR(-, UByte);
296 IMPLEMENT_BINARY_OPERATOR(-, SByte);
297 IMPLEMENT_BINARY_OPERATOR(-, UShort);
298 IMPLEMENT_BINARY_OPERATOR(-, Short);
299 IMPLEMENT_BINARY_OPERATOR(-, UInt);
300 IMPLEMENT_BINARY_OPERATOR(-, Int);
301 IMPLEMENT_BINARY_OPERATOR(-, ULong);
302 IMPLEMENT_BINARY_OPERATOR(-, Long);
303 IMPLEMENT_BINARY_OPERATOR(-, Float);
304 IMPLEMENT_BINARY_OPERATOR(-, Double);
305 IMPLEMENT_BINARY_OPERATOR(-, Pointer);
307 cout << "Unhandled type for Sub instruction: " << Ty << endl;
312 static GenericValue executeMulInst(GenericValue Src1, GenericValue Src2,
313 const Type *Ty, ExecutionContext &SF) {
315 switch (Ty->getPrimitiveID()) {
316 IMPLEMENT_BINARY_OPERATOR(*, UByte);
317 IMPLEMENT_BINARY_OPERATOR(*, SByte);
318 IMPLEMENT_BINARY_OPERATOR(*, UShort);
319 IMPLEMENT_BINARY_OPERATOR(*, Short);
320 IMPLEMENT_BINARY_OPERATOR(*, UInt);
321 IMPLEMENT_BINARY_OPERATOR(*, Int);
322 IMPLEMENT_BINARY_OPERATOR(*, ULong);
323 IMPLEMENT_BINARY_OPERATOR(*, Long);
324 IMPLEMENT_BINARY_OPERATOR(*, Float);
325 IMPLEMENT_BINARY_OPERATOR(*, Double);
326 IMPLEMENT_BINARY_OPERATOR(*, Pointer);
328 cout << "Unhandled type for Mul instruction: " << Ty << endl;
333 static GenericValue executeDivInst(GenericValue Src1, GenericValue Src2,
334 const Type *Ty, ExecutionContext &SF) {
336 switch (Ty->getPrimitiveID()) {
337 IMPLEMENT_BINARY_OPERATOR(/, UByte);
338 IMPLEMENT_BINARY_OPERATOR(/, SByte);
339 IMPLEMENT_BINARY_OPERATOR(/, UShort);
340 IMPLEMENT_BINARY_OPERATOR(/, Short);
341 IMPLEMENT_BINARY_OPERATOR(/, UInt);
342 IMPLEMENT_BINARY_OPERATOR(/, Int);
343 IMPLEMENT_BINARY_OPERATOR(/, ULong);
344 IMPLEMENT_BINARY_OPERATOR(/, Long);
345 IMPLEMENT_BINARY_OPERATOR(/, Float);
346 IMPLEMENT_BINARY_OPERATOR(/, Double);
347 IMPLEMENT_BINARY_OPERATOR(/, Pointer);
349 cout << "Unhandled type for Div instruction: " << Ty << endl;
354 static GenericValue executeRemInst(GenericValue Src1, GenericValue Src2,
355 const Type *Ty, ExecutionContext &SF) {
357 switch (Ty->getPrimitiveID()) {
358 IMPLEMENT_BINARY_OPERATOR(%, UByte);
359 IMPLEMENT_BINARY_OPERATOR(%, SByte);
360 IMPLEMENT_BINARY_OPERATOR(%, UShort);
361 IMPLEMENT_BINARY_OPERATOR(%, Short);
362 IMPLEMENT_BINARY_OPERATOR(%, UInt);
363 IMPLEMENT_BINARY_OPERATOR(%, Int);
364 IMPLEMENT_BINARY_OPERATOR(%, ULong);
365 IMPLEMENT_BINARY_OPERATOR(%, Long);
366 IMPLEMENT_BINARY_OPERATOR(%, Pointer);
367 case Type::FloatTyID:
368 Dest.FloatVal = fmod(Src1.FloatVal, Src2.FloatVal);
370 case Type::DoubleTyID:
371 Dest.DoubleVal = fmod(Src1.DoubleVal, Src2.DoubleVal);
374 cout << "Unhandled type for Rem instruction: " << Ty << endl;
379 static GenericValue executeAndInst(GenericValue Src1, GenericValue Src2,
380 const Type *Ty, ExecutionContext &SF) {
382 switch (Ty->getPrimitiveID()) {
383 IMPLEMENT_BINARY_OPERATOR(&, UByte);
384 IMPLEMENT_BINARY_OPERATOR(&, SByte);
385 IMPLEMENT_BINARY_OPERATOR(&, UShort);
386 IMPLEMENT_BINARY_OPERATOR(&, Short);
387 IMPLEMENT_BINARY_OPERATOR(&, UInt);
388 IMPLEMENT_BINARY_OPERATOR(&, Int);
389 IMPLEMENT_BINARY_OPERATOR(&, ULong);
390 IMPLEMENT_BINARY_OPERATOR(&, Long);
391 IMPLEMENT_BINARY_OPERATOR(&, Pointer);
393 cout << "Unhandled type for And instruction: " << Ty << endl;
399 static GenericValue executeOrInst(GenericValue Src1, GenericValue Src2,
400 const Type *Ty, ExecutionContext &SF) {
402 switch (Ty->getPrimitiveID()) {
403 IMPLEMENT_BINARY_OPERATOR(|, UByte);
404 IMPLEMENT_BINARY_OPERATOR(|, SByte);
405 IMPLEMENT_BINARY_OPERATOR(|, UShort);
406 IMPLEMENT_BINARY_OPERATOR(|, Short);
407 IMPLEMENT_BINARY_OPERATOR(|, UInt);
408 IMPLEMENT_BINARY_OPERATOR(|, Int);
409 IMPLEMENT_BINARY_OPERATOR(|, ULong);
410 IMPLEMENT_BINARY_OPERATOR(|, Long);
411 IMPLEMENT_BINARY_OPERATOR(|, Pointer);
413 cout << "Unhandled type for Or instruction: " << Ty << endl;
419 static GenericValue executeXorInst(GenericValue Src1, GenericValue Src2,
420 const Type *Ty, ExecutionContext &SF) {
422 switch (Ty->getPrimitiveID()) {
423 IMPLEMENT_BINARY_OPERATOR(^, UByte);
424 IMPLEMENT_BINARY_OPERATOR(^, SByte);
425 IMPLEMENT_BINARY_OPERATOR(^, UShort);
426 IMPLEMENT_BINARY_OPERATOR(^, Short);
427 IMPLEMENT_BINARY_OPERATOR(^, UInt);
428 IMPLEMENT_BINARY_OPERATOR(^, Int);
429 IMPLEMENT_BINARY_OPERATOR(^, ULong);
430 IMPLEMENT_BINARY_OPERATOR(^, Long);
431 IMPLEMENT_BINARY_OPERATOR(^, Pointer);
433 cout << "Unhandled type for Xor instruction: " << Ty << endl;
439 #define IMPLEMENT_SETCC(OP, TY) \
440 case Type::TY##TyID: Dest.BoolVal = Src1.TY##Val OP Src2.TY##Val; break
442 static GenericValue executeSetEQInst(GenericValue Src1, GenericValue Src2,
443 const Type *Ty, ExecutionContext &SF) {
445 switch (Ty->getPrimitiveID()) {
446 IMPLEMENT_SETCC(==, UByte);
447 IMPLEMENT_SETCC(==, SByte);
448 IMPLEMENT_SETCC(==, UShort);
449 IMPLEMENT_SETCC(==, Short);
450 IMPLEMENT_SETCC(==, UInt);
451 IMPLEMENT_SETCC(==, Int);
452 IMPLEMENT_SETCC(==, ULong);
453 IMPLEMENT_SETCC(==, Long);
454 IMPLEMENT_SETCC(==, Float);
455 IMPLEMENT_SETCC(==, Double);
456 IMPLEMENT_SETCC(==, Pointer);
458 cout << "Unhandled type for SetEQ instruction: " << Ty << endl;
463 static GenericValue executeSetNEInst(GenericValue Src1, GenericValue Src2,
464 const Type *Ty, ExecutionContext &SF) {
466 switch (Ty->getPrimitiveID()) {
467 IMPLEMENT_SETCC(!=, UByte);
468 IMPLEMENT_SETCC(!=, SByte);
469 IMPLEMENT_SETCC(!=, UShort);
470 IMPLEMENT_SETCC(!=, Short);
471 IMPLEMENT_SETCC(!=, UInt);
472 IMPLEMENT_SETCC(!=, Int);
473 IMPLEMENT_SETCC(!=, ULong);
474 IMPLEMENT_SETCC(!=, Long);
475 IMPLEMENT_SETCC(!=, Float);
476 IMPLEMENT_SETCC(!=, Double);
477 IMPLEMENT_SETCC(!=, Pointer);
480 cout << "Unhandled type for SetNE instruction: " << Ty << endl;
485 static GenericValue executeSetLEInst(GenericValue Src1, GenericValue Src2,
486 const Type *Ty, ExecutionContext &SF) {
488 switch (Ty->getPrimitiveID()) {
489 IMPLEMENT_SETCC(<=, UByte);
490 IMPLEMENT_SETCC(<=, SByte);
491 IMPLEMENT_SETCC(<=, UShort);
492 IMPLEMENT_SETCC(<=, Short);
493 IMPLEMENT_SETCC(<=, UInt);
494 IMPLEMENT_SETCC(<=, Int);
495 IMPLEMENT_SETCC(<=, ULong);
496 IMPLEMENT_SETCC(<=, Long);
497 IMPLEMENT_SETCC(<=, Float);
498 IMPLEMENT_SETCC(<=, Double);
499 IMPLEMENT_SETCC(<=, Pointer);
501 cout << "Unhandled type for SetLE instruction: " << Ty << endl;
506 static GenericValue executeSetGEInst(GenericValue Src1, GenericValue Src2,
507 const Type *Ty, ExecutionContext &SF) {
509 switch (Ty->getPrimitiveID()) {
510 IMPLEMENT_SETCC(>=, UByte);
511 IMPLEMENT_SETCC(>=, SByte);
512 IMPLEMENT_SETCC(>=, UShort);
513 IMPLEMENT_SETCC(>=, Short);
514 IMPLEMENT_SETCC(>=, UInt);
515 IMPLEMENT_SETCC(>=, Int);
516 IMPLEMENT_SETCC(>=, ULong);
517 IMPLEMENT_SETCC(>=, Long);
518 IMPLEMENT_SETCC(>=, Float);
519 IMPLEMENT_SETCC(>=, Double);
520 IMPLEMENT_SETCC(>=, Pointer);
522 cout << "Unhandled type for SetGE instruction: " << Ty << endl;
527 static GenericValue executeSetLTInst(GenericValue Src1, GenericValue Src2,
528 const Type *Ty, ExecutionContext &SF) {
530 switch (Ty->getPrimitiveID()) {
531 IMPLEMENT_SETCC(<, UByte);
532 IMPLEMENT_SETCC(<, SByte);
533 IMPLEMENT_SETCC(<, UShort);
534 IMPLEMENT_SETCC(<, Short);
535 IMPLEMENT_SETCC(<, UInt);
536 IMPLEMENT_SETCC(<, Int);
537 IMPLEMENT_SETCC(<, ULong);
538 IMPLEMENT_SETCC(<, Long);
539 IMPLEMENT_SETCC(<, Float);
540 IMPLEMENT_SETCC(<, Double);
541 IMPLEMENT_SETCC(<, Pointer);
543 cout << "Unhandled type for SetLT instruction: " << Ty << endl;
548 static GenericValue executeSetGTInst(GenericValue Src1, GenericValue Src2,
549 const Type *Ty, ExecutionContext &SF) {
551 switch (Ty->getPrimitiveID()) {
552 IMPLEMENT_SETCC(>, UByte);
553 IMPLEMENT_SETCC(>, SByte);
554 IMPLEMENT_SETCC(>, UShort);
555 IMPLEMENT_SETCC(>, Short);
556 IMPLEMENT_SETCC(>, UInt);
557 IMPLEMENT_SETCC(>, Int);
558 IMPLEMENT_SETCC(>, ULong);
559 IMPLEMENT_SETCC(>, Long);
560 IMPLEMENT_SETCC(>, Float);
561 IMPLEMENT_SETCC(>, Double);
562 IMPLEMENT_SETCC(>, Pointer);
564 cout << "Unhandled type for SetGT instruction: " << Ty << endl;
569 static void executeBinaryInst(BinaryOperator *I, ExecutionContext &SF) {
570 const Type *Ty = I->getOperand(0)->getType();
571 GenericValue Src1 = getOperandValue(I->getOperand(0), SF);
572 GenericValue Src2 = getOperandValue(I->getOperand(1), SF);
573 GenericValue R; // Result
575 switch (I->getOpcode()) {
576 case Instruction::Add: R = executeAddInst (Src1, Src2, Ty, SF); break;
577 case Instruction::Sub: R = executeSubInst (Src1, Src2, Ty, SF); break;
578 case Instruction::Mul: R = executeMulInst (Src1, Src2, Ty, SF); break;
579 case Instruction::Div: R = executeDivInst (Src1, Src2, Ty, SF); break;
580 case Instruction::Rem: R = executeRemInst (Src1, Src2, Ty, SF); break;
581 case Instruction::And: R = executeAndInst (Src1, Src2, Ty, SF); break;
582 case Instruction::Or: R = executeOrInst (Src1, Src2, Ty, SF); break;
583 case Instruction::Xor: R = executeXorInst (Src1, Src2, Ty, SF); break;
584 case Instruction::SetEQ: R = executeSetEQInst(Src1, Src2, Ty, SF); break;
585 case Instruction::SetNE: R = executeSetNEInst(Src1, Src2, Ty, SF); break;
586 case Instruction::SetLE: R = executeSetLEInst(Src1, Src2, Ty, SF); break;
587 case Instruction::SetGE: R = executeSetGEInst(Src1, Src2, Ty, SF); break;
588 case Instruction::SetLT: R = executeSetLTInst(Src1, Src2, Ty, SF); break;
589 case Instruction::SetGT: R = executeSetGTInst(Src1, Src2, Ty, SF); break;
591 cout << "Don't know how to handle this binary operator!\n-->" << I;
598 //===----------------------------------------------------------------------===//
599 // Terminator Instruction Implementations
600 //===----------------------------------------------------------------------===//
602 static void PerformExitStuff() {
603 #ifdef PROFILE_STRUCTURE_FIELDS
604 // Print out structure field accounting information...
605 if (!FieldAccessCounts.empty()) {
606 CW << "Profile Field Access Counts:\n";
607 map<const StructType *, vector<unsigned> >::iterator
608 I = FieldAccessCounts.begin(), E = FieldAccessCounts.end();
609 for (; I != E; ++I) {
610 vector<unsigned> &OfC = I->second;
611 CW << " '" << (Value*)I->first << "'\t- Sum=";
614 for (unsigned i = 0; i < OfC.size(); ++i)
618 for (unsigned i = 0; i < OfC.size(); ++i) {
626 CW << "Profile Field Access Percentages:\n";
628 for (I = FieldAccessCounts.begin(); I != E; ++I) {
629 vector<unsigned> &OfC = I->second;
631 for (unsigned i = 0; i < OfC.size(); ++i)
634 CW << " '" << (Value*)I->first << "'\t- ";
635 for (unsigned i = 0; i < OfC.size(); ++i) {
637 CW << double(OfC[i])/Sum;
643 FieldAccessCounts.clear();
648 void Interpreter::exitCalled(GenericValue GV) {
649 cout << "Program returned ";
650 print(Type::IntTy, GV);
651 cout << " via 'void exit(int)'\n";
653 ExitCode = GV.SByteVal;
658 void Interpreter::executeRetInst(ReturnInst *I, ExecutionContext &SF) {
659 const Type *RetTy = 0;
662 // Save away the return value... (if we are not 'ret void')
663 if (I->getNumOperands()) {
664 RetTy = I->getReturnValue()->getType();
665 Result = getOperandValue(I->getReturnValue(), SF);
668 // Save previously executing meth
669 const Method *M = ECStack.back().CurMethod;
671 // Pop the current stack frame... this invalidates SF
674 if (ECStack.empty()) { // Finished main. Put result into exit code...
675 if (RetTy) { // Nonvoid return type?
676 CW << "Method " << M->getType() << " \"" << M->getName()
678 print(RetTy, Result);
681 if (RetTy->isIntegral())
682 ExitCode = Result.SByteVal; // Capture the exit code of the program
691 // If we have a previous stack frame, and we have a previous call, fill in
692 // the return value...
694 ExecutionContext &NewSF = ECStack.back();
696 if (NewSF.Caller->getType() != Type::VoidTy) // Save result...
697 SetValue(NewSF.Caller, Result, NewSF);
699 NewSF.Caller = 0; // We returned from the call...
701 // This must be a function that is executing because of a user 'call'
703 CW << "Method " << M->getType() << " \"" << M->getName()
705 print(RetTy, Result);
710 void Interpreter::executeBrInst(BranchInst *I, ExecutionContext &SF) {
711 SF.PrevBB = SF.CurBB; // Update PrevBB so that PHI nodes work...
714 Dest = I->getSuccessor(0); // Uncond branches have a fixed dest...
715 if (!I->isUnconditional()) {
716 Value *Cond = I->getCondition();
717 GenericValue CondVal = getOperandValue(Cond, SF);
718 if (CondVal.BoolVal == 0) // If false cond...
719 Dest = I->getSuccessor(1);
721 SF.CurBB = Dest; // Update CurBB to branch destination
722 SF.CurInst = SF.CurBB->begin(); // Update new instruction ptr...
725 //===----------------------------------------------------------------------===//
726 // Memory Instruction Implementations
727 //===----------------------------------------------------------------------===//
729 void Interpreter::executeAllocInst(AllocationInst *I, ExecutionContext &SF) {
730 const Type *Ty = I->getType()->getValueType(); // Type to be allocated
731 unsigned NumElements = 1;
733 if (I->getNumOperands()) { // Allocating a unsized array type?
734 assert(isa<ArrayType>(Ty) && cast<const ArrayType>(Ty)->isUnsized() &&
735 "Allocation inst with size operand for !unsized array type???");
736 Ty = cast<const ArrayType>(Ty)->getElementType(); // Get the actual 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...
745 // FIXME: Don't use CALLOC, use a tainted malloc.
746 Result.PointerVal = (PointerTy)calloc(NumElements, TD.getTypeSize(Ty));
747 assert(Result.PointerVal != 0 && "Null pointer returned by malloc!");
748 SetValue(I, Result, SF);
750 if (I->getOpcode() == Instruction::Alloca) {
751 // TODO: FIXME: alloca should keep track of memory to free it later...
755 static void executeFreeInst(FreeInst *I, ExecutionContext &SF) {
756 assert(I->getOperand(0)->getType()->isPointerType() && "Freeing nonptr?");
757 GenericValue Value = getOperandValue(I->getOperand(0), SF);
758 // TODO: Check to make sure memory is allocated
759 free((void*)Value.PointerVal); // Free memory
763 // getElementOffset - The workhorse for getelementptr, load and store. This
764 // function returns the offset that arguments ArgOff+1 -> NumArgs specify for
765 // the pointer type specified by argument Arg.
767 static PointerTy getElementOffset(MemAccessInst *I, ExecutionContext &SF) {
768 assert(isa<PointerType>(I->getPointerOperand()->getType()) &&
769 "Cannot getElementOffset of a nonpointer type!");
773 cast<PointerType>(I->getPointerOperand()->getType())->getValueType();
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 ConstPoolUInt *CPU = cast<ConstPoolUInt>(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];
797 const ArrayType *AT = cast<ArrayType>(Ty);
799 // Get the index number for the array... which must be uint type...
800 assert(I->getOperand(ArgOff)->getType() == Type::UIntTy);
801 unsigned Idx = getOperandValue(I->getOperand(ArgOff++), SF).UIntVal;
802 if (AT->isSized() && Idx >= (unsigned)AT->getNumElements()) {
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, -1);
811 Ty = AT->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 method pointer.
898 GenericValue SRC = getOperandValue(I->getCalledValue(), SF);
900 callMethod((Method*)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 << endl;
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 << endl;
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 << endl; \
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 << endl;
1017 SetValue(I, Dest, SF);
1023 //===----------------------------------------------------------------------===//
1024 // Dispatch and Execution Code
1025 //===----------------------------------------------------------------------===//
1027 MethodInfo::MethodInfo(Method *M) : Annotation(MethodInfoAID) {
1028 // Assign slot numbers to the method arguments...
1029 const Method::ArgumentListType &ArgList = M->getArgumentList();
1030 for (Method::ArgumentListType::const_iterator AI = ArgList.begin(),
1031 AE = ArgList.end(); AI != AE; ++AI) {
1032 MethodArgument *MA = *AI;
1033 MA->addAnnotation(new SlotNumber(getValueSlot(MA)));
1036 // Iterate over all of the instructions...
1037 unsigned InstNum = 0;
1038 for (Method::inst_iterator MI = M->inst_begin(), ME = M->inst_end();
1040 Instruction *I = *MI; // For each instruction...
1041 I->addAnnotation(new InstNumber(++InstNum, getValueSlot(I))); // Add Annote
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 method...
1056 void Interpreter::callMethod(Method *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 CallInst *Caller = SF.Caller;
1070 SetValue(SF.Caller, Result, SF);
1072 SF.Caller = 0; // We returned from the call...
1075 CW << "Method " << M->getType() << " \"" << M->getName()
1077 print(RetTy, Result);
1080 if (RetTy->isIntegral())
1081 ExitCode = Result.SByteVal; // Capture the exit code of the program
1088 // Process the method, assigning instruction numbers to the instructions in
1089 // the method. Also calculate the number of values for each type slot active.
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 method arguments and initialize their values...
1114 assert(ArgVals.size() == M->getArgumentList().size() &&
1115 "Invalid number of values passed to method invocation!");
1117 for (Method::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 && SigNo != -1) {
1141 cout << "EXCEPTION OCCURRED [" << _sys_siglistp[SigNo] << "]:\n";
1143 } else if (SigNo == SIGINT) {
1144 cout << "CTRL-C Detected, execution halted.\n";
1146 InInstruction = false;
1150 InInstruction = true;
1151 if (I->isBinaryOp()) {
1152 executeBinaryInst(cast<BinaryOperator>(I), SF);
1154 switch (I->getOpcode()) {
1156 case Instruction::Ret: executeRetInst (cast<ReturnInst>(I), SF); break;
1157 case Instruction::Br: executeBrInst (cast<BranchInst>(I), SF); break;
1158 // Memory Instructions
1159 case Instruction::Alloca:
1160 case Instruction::Malloc: executeAllocInst((AllocationInst*)I, SF); break;
1161 case Instruction::Free: executeFreeInst (cast<FreeInst> (I), SF); break;
1162 case Instruction::Load: executeLoadInst (cast<LoadInst> (I), SF); break;
1163 case Instruction::Store: executeStoreInst(cast<StoreInst>(I), SF); break;
1164 case Instruction::GetElementPtr:
1165 executeGEPInst(cast<GetElementPtrInst>(I), SF); break;
1167 // Miscellaneous Instructions
1168 case Instruction::Call: executeCallInst (cast<CallInst> (I), SF); break;
1169 case Instruction::PHINode: executePHINode (cast<PHINode> (I), SF); break;
1170 case Instruction::Shl: executeShlInst (cast<ShiftInst>(I), SF); break;
1171 case Instruction::Shr: executeShrInst (cast<ShiftInst>(I), SF); break;
1172 case Instruction::Cast: executeCastInst (cast<CastInst> (I), SF); break;
1174 cout << "Don't know how to execute this instruction!\n-->" << I;
1177 InInstruction = false;
1179 // Reset the current frame location to the top of stack
1180 CurFrame = ECStack.size()-1;
1182 if (CurFrame == -1) return false; // No breakpoint if no code
1184 // Return true if there is a breakpoint annotation on the instruction...
1185 return (*ECStack[CurFrame].CurInst)->getAnnotation(BreakpointAID) != 0;
1188 void Interpreter::stepInstruction() { // Do the 'step' command
1189 if (ECStack.empty()) {
1190 cout << "Error: no program running, cannot step!\n";
1194 // Run an instruction...
1195 executeInstruction();
1197 // Print the next instruction to execute...
1198 printCurrentInstruction();
1202 void Interpreter::nextInstruction() { // Do the 'next' command
1203 if (ECStack.empty()) {
1204 cout << "Error: no program running, cannot 'next'!\n";
1208 // If this is a call instruction, step over the call instruction...
1209 // TODO: ICALL, CALL WITH, ...
1210 if ((*ECStack.back().CurInst)->getOpcode() == Instruction::Call) {
1211 unsigned StackSize = ECStack.size();
1212 // Step into the function...
1213 if (executeInstruction()) {
1214 // Hit a breakpoint, print current instruction, then return to user...
1215 cout << "Breakpoint hit!\n";
1216 printCurrentInstruction();
1220 // If we we able to step into the function, finish it now. We might not be
1221 // able the step into a function, if it's external for example.
1222 if (ECStack.size() != StackSize)
1223 finish(); // Finish executing the function...
1225 printCurrentInstruction();
1228 // Normal instruction, just step...
1233 void Interpreter::run() {
1234 if (ECStack.empty()) {
1235 cout << "Error: no program running, cannot run!\n";
1239 bool HitBreakpoint = false;
1240 while (!ECStack.empty() && !HitBreakpoint) {
1241 // Run an instruction...
1242 HitBreakpoint = executeInstruction();
1245 if (HitBreakpoint) {
1246 cout << "Breakpoint hit!\n";
1248 // Print the next instruction to execute...
1249 printCurrentInstruction();
1252 void Interpreter::finish() {
1253 if (ECStack.empty()) {
1254 cout << "Error: no program running, cannot run!\n";
1258 unsigned StackSize = ECStack.size();
1259 bool HitBreakpoint = false;
1260 while (ECStack.size() >= StackSize && !HitBreakpoint) {
1261 // Run an instruction...
1262 HitBreakpoint = executeInstruction();
1265 if (HitBreakpoint) {
1266 cout << "Breakpoint hit!\n";
1269 // Print the next instruction to execute...
1270 printCurrentInstruction();
1275 // printCurrentInstruction - Print out the instruction that the virtual PC is
1276 // at, or fail silently if no program is running.
1278 void Interpreter::printCurrentInstruction() {
1279 if (!ECStack.empty()) {
1280 if (ECStack.back().CurBB->begin() == ECStack.back().CurInst) // print label
1281 WriteAsOperand(cout, ECStack.back().CurBB) << ":\n";
1283 Instruction *I = *ECStack.back().CurInst;
1284 InstNumber *IN = (InstNumber*)I->getAnnotation(SlotNumberAID);
1285 assert(IN && "Instruction has no numbering annotation!");
1286 cout << "#" << IN->InstNum << I;
1290 void Interpreter::printValue(const Type *Ty, GenericValue V) {
1291 switch (Ty->getPrimitiveID()) {
1292 case Type::BoolTyID: cout << (V.BoolVal?"true":"false"); break;
1293 case Type::SByteTyID: cout << V.SByteVal; break;
1294 case Type::UByteTyID: cout << V.UByteVal; break;
1295 case Type::ShortTyID: cout << V.ShortVal; break;
1296 case Type::UShortTyID: cout << V.UShortVal; break;
1297 case Type::IntTyID: cout << V.IntVal; break;
1298 case Type::UIntTyID: cout << V.UIntVal; break;
1299 case Type::LongTyID: cout << V.LongVal; break;
1300 case Type::ULongTyID: cout << V.ULongVal; break;
1301 case Type::FloatTyID: cout << V.FloatVal; break;
1302 case Type::DoubleTyID: cout << V.DoubleVal; break;
1303 case Type::PointerTyID:cout << (void*)V.PointerVal; break;
1305 cout << "- Don't know how to print value of this type!";
1310 void Interpreter::print(const Type *Ty, GenericValue V) {
1315 void Interpreter::print(const string &Name) {
1316 Value *PickedVal = ChooseOneOption(Name, LookupMatchingNames(Name));
1317 if (!PickedVal) return;
1319 if (const Method *M = dyn_cast<const Method>(PickedVal)) {
1320 CW << M; // Print the method
1321 } else if (const Type *Ty = dyn_cast<const Type>(PickedVal)) {
1322 CW << "type %" << Name << " = " << Ty->getDescription() << endl;
1323 } else if (const BasicBlock *BB = dyn_cast<const BasicBlock>(PickedVal)) {
1324 CW << BB; // Print the basic block
1325 } else { // Otherwise there should be an annotation for the slot#
1326 print(PickedVal->getType(),
1327 getOperandValue(PickedVal, ECStack[CurFrame]));
1332 void Interpreter::infoValue(const string &Name) {
1333 Value *PickedVal = ChooseOneOption(Name, LookupMatchingNames(Name));
1334 if (!PickedVal) return;
1337 print(PickedVal->getType(),
1338 getOperandValue(PickedVal, ECStack[CurFrame]));
1340 printOperandInfo(PickedVal, ECStack[CurFrame]);
1343 // printStackFrame - Print information about the specified stack frame, or -1
1344 // for the default one.
1346 void Interpreter::printStackFrame(int FrameNo = -1) {
1347 if (FrameNo == -1) FrameNo = CurFrame;
1348 Method *Meth = ECStack[FrameNo].CurMethod;
1349 const Type *RetTy = Meth->getReturnType();
1351 CW << ((FrameNo == CurFrame) ? '>' : '-') << "#" << FrameNo << ". "
1352 << (Value*)RetTy << " \"" << Meth->getName() << "\"(";
1354 Method::ArgumentListType &Args = Meth->getArgumentList();
1355 for (unsigned i = 0; i < Args.size(); ++i) {
1356 if (i != 0) cout << ", ";
1357 CW << (Value*)Args[i] << "=";
1359 printValue(Args[i]->getType(), getOperandValue(Args[i], ECStack[FrameNo]));
1362 cout << ")" << endl;
1363 CW << *(ECStack[FrameNo].CurInst-(FrameNo != int(ECStack.size()-1)));