void BasicBlockCounter::instrument()
{
InstrumentationTool::instrument();
ASSERT(currentPhase == ElfInstPhase_user_reserve && "Instrumentation phase order must be observed");
uint32_t temp32;
LineInfoFinder* lineInfoFinder = NULL;
if (hasLineInformation()){
lineInfoFinder = getLineInfoFinder();
}
uint64_t lineArray = reserveDataOffset(getNumberOfExposedBasicBlocks() * sizeof(uint32_t));
uint64_t fileNameArray = reserveDataOffset(getNumberOfExposedBasicBlocks() * sizeof(char*));
uint64_t funcNameArray = reserveDataOffset(getNumberOfExposedBasicBlocks() * sizeof(char*));
uint64_t hashCodeArray = reserveDataOffset(getNumberOfExposedBasicBlocks() * sizeof(uint64_t));
uint64_t appName = reserveDataOffset((strlen(getApplicationName()) + 1) * sizeof(char));
initializeReservedData(getInstDataAddress() + appName, strlen(getApplicationName()) + 1, getApplicationName());
uint64_t instExt = reserveDataOffset((strlen(getInstSuffix()) + 1) * sizeof(char));
initializeReservedData(getInstDataAddress() + instExt, strlen(getInstSuffix()) + 1, getInstSuffix());
// the number blocks in the code
uint64_t counterArrayEntries = reserveDataOffset(sizeof(uint32_t));
// an array of counters. note that everything is passed by reference
uint64_t counterArray = reserveDataOffset(getNumberOfExposedBasicBlocks() * sizeof(uint32_t));
exitFunc->addArgument(counterArray);
exitFunc->addArgument(appName);
exitFunc->addArgument(instExt);
InstrumentationPoint* p = addInstrumentationPoint(getProgramExitBlock(), exitFunc, InstrumentationMode_tramp);
if (!p->getInstBaseAddress()){
PRINT_ERROR("Cannot find an instrumentation point at the exit function");
}
temp32 = 0;
for (uint32_t i = 0; i < getNumberOfExposedBasicBlocks(); i++){
initializeReservedData(getInstDataAddress() + counterArray + i*sizeof(uint32_t), sizeof(uint32_t), &temp32);
}
// the number of inst points
entryFunc->addArgument(counterArrayEntries);
temp32 = getNumberOfExposedBasicBlocks();
initializeReservedData(getInstDataAddress() + counterArrayEntries, sizeof(uint32_t), &temp32);
// an array for line numbers
entryFunc->addArgument(lineArray);
// an array for file name pointers
entryFunc->addArgument(fileNameArray);
// an array for function name pointers
entryFunc->addArgument(funcNameArray);
// an array for hashcodes
entryFunc->addArgument(hashCodeArray);
p = addInstrumentationPoint(getProgramEntryBlock(), entryFunc, InstrumentationMode_tramp, FlagsProtectionMethod_full, InstLocation_prior);
p->setPriority(InstPriority_userinit);
if (!p->getInstBaseAddress()){
PRINT_ERROR("Cannot find an instrumentation point at the entry block");
}
uint64_t noDataAddr = getInstDataAddress() + reserveDataOffset(strlen(NOSTRING) + 1);
char* nostring = new char[strlen(NOSTRING) + 1];
sprintf(nostring, "%s\0", NOSTRING);
initializeReservedData(noDataAddr, strlen(NOSTRING) + 1, nostring);
PRINT_DEBUG_MEMTRACK("There are %d instrumentation points", getNumberOfExposedBasicBlocks());
Vector<BasicBlock*>* allBlocks = new Vector<BasicBlock*>();
Vector<LineInfo*>* allLineInfos = new Vector<LineInfo*>();
uint32_t noProtPoints = 0;
uint32_t complexSelection = 0;
for (uint32_t i = 0; i < getNumberOfExposedBasicBlocks(); i++){
BasicBlock* bb = getExposedBasicBlock(i);
LineInfo* li = NULL;
if (lineInfoFinder){
li = lineInfoFinder->lookupLineInfo(bb);
}
Function* f = bb->getFunction();
(*allBlocks).append(bb);
(*allLineInfos).append(li);
if (i % 1000 == 0){
PRINT_DEBUG_MEMTRACK("inst point %d", i);
PRINT_MEMTRACK_STATS(__LINE__, __FILE__, __FUNCTION__);
}
if (li){
uint32_t line = li->GET(lr_line);
initializeReservedData(getInstDataAddress() + lineArray + sizeof(uint32_t)*i, sizeof(uint32_t), &line);
uint64_t filename = reserveDataOffset(strlen(li->getFileName()) + 1);
uint64_t filenameAddr = getInstDataAddress() + filename;
initializeReservedData(getInstDataAddress() + fileNameArray + i*sizeof(char*), sizeof(char*), &filenameAddr);
initializeReservedData(getInstDataAddress() + filename, strlen(li->getFileName()) + 1, (void*)li->getFileName());
} else {
temp32 = 0;
initializeReservedData(getInstDataAddress() + lineArray + sizeof(uint32_t)*i, sizeof(uint32_t), &temp32);
initializeReservedData(getInstDataAddress() + fileNameArray + i*sizeof(char*), sizeof(char*), &noDataAddr);
}
uint64_t funcname = reserveDataOffset(strlen(f->getName()) + 1);
uint64_t funcnameAddr = getInstDataAddress() + funcname;
initializeReservedData(getInstDataAddress() + funcNameArray + i*sizeof(char*), sizeof(char*), &funcnameAddr);
initializeReservedData(getInstDataAddress() + funcname, strlen(f->getName()) + 1, (void*)f->getName());
uint64_t hashValue = bb->getHashCode().getValue();
initializeReservedData(getInstDataAddress() + hashCodeArray + i*sizeof(uint64_t), sizeof(uint64_t), &hashValue);
InstrumentationSnippet* snip = new InstrumentationSnippet();
uint64_t counterOffset = counterArray + (i * sizeof(uint32_t));
// snippet contents, in this case just increment a counter
if (is64Bit()){
snip->addSnippetInstruction(X86InstructionFactory64::emitAddImmByteToMem(1, getInstDataAddress() + counterOffset));
} else {
snip->addSnippetInstruction(X86InstructionFactory32::emitAddImmByteToMem(1, getInstDataAddress() + counterOffset));
}
// do not generate control instructions to get back to the application, this is done for
// the snippet automatically during code generation
// register the snippet we just created
addInstrumentationSnippet(snip);
// register an instrumentation point at the function that uses this snippet
FlagsProtectionMethods prot = FlagsProtectionMethod_light;
#ifndef NO_REG_ANALYSIS
if (bb->getLeader()->allFlagsDeadIn()){
prot = FlagsProtectionMethod_none;
noProtPoints++;
}
for (uint32_t j = 0; j < bb->getNumberOfInstructions(); j++){
if (bb->getInstruction(j)->allFlagsDeadIn() || bb->getInstruction(j)->allFlagsDeadOut()){
complexSelection++;
break;
}
}
#endif
InstrumentationPoint* p = addInstrumentationPoint(bb, snip, InstrumentationMode_inline, prot);
}
PRINT_MEMTRACK_STATS(__LINE__, __FILE__, __FUNCTION__);
#ifdef NO_REG_ANALYSIS
PRINT_WARN(10, "Warning: register analysis disabled");
#endif
PRINT_INFOR("Excluding flags protection for %d/%d instrumentation points", noProtPoints, getNumberOfExposedBasicBlocks());
//PRINT_INFOR("complex inst point selection: %d/%d instrumentation points", complexSelection, getNumberOfExposedBasicBlocks());
printStaticFile(allBlocks, allLineInfos);
delete[] nostring;
delete allBlocks;
delete allLineInfos;
ASSERT(currentPhase == ElfInstPhase_user_reserve && "Instrumentation phase order must be observed");
}
