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llvm-cov: Added support for function checksums.

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The function checksums are hashed from the concatenation of the function
name and line number.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196358 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Yuchen Wu
2013-12-04 06:00:17 +00:00
parent 45a5b27d9b
commit 2ebea72474
10 changed files with 29 additions and 7 deletions
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19
lib/Transforms/Instrumentation/GCOVProfiling.cpp
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@ -314,12 +314,18 @@ namespace {
this->os = os;
Function *F = SP.getFunction();
DEBUG(dbgs() << "Function: " << F->getName() << "\n");
DEBUG(dbgs() << "Function: " << getFunctionName(SP) << "\n");
uint32_t i = 0;
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
Blocks[BB] = new GCOVBlock(i++, os);
}
ReturnBlock = new GCOVBlock(i++, os);
std::string FunctionNameAndLine;
raw_string_ostream FNLOS(FunctionNameAndLine);
FNLOS << getFunctionName(SP) << SP.getLineNumber();
FNLOS.flush();
FuncChecksum = hash_value(FunctionNameAndLine);
}
~GCOVFunction() {
@ -347,6 +353,10 @@ namespace {
return EdgeDestinations;
}
uint32_t getFuncChecksum() {
return FuncChecksum;
}
void setCfgChecksum(uint32_t Checksum) {
CfgChecksum = Checksum;
}
@ -359,7 +369,7 @@ namespace {
++BlockLen;
write(BlockLen);
write(Ident);
write(0); // lineno checksum
write(FuncChecksum);
if (UseCfgChecksum)
write(CfgChecksum);
writeGCOVString(getFunctionName(SP));
@ -401,6 +411,7 @@ namespace {
private:
DISubprogram SP;
uint32_t Ident;
uint32_t FuncChecksum;
bool UseCfgChecksum;
uint32_t CfgChecksum;
DenseMap<BasicBlock *, GCOVBlock *> Blocks;
@ -731,6 +742,7 @@ Constant *GCOVProfiler::getEmitFunctionFunc() {
Type *Args[] = {
Type::getInt32Ty(*Ctx), // uint32_t ident
Type::getInt8PtrTy(*Ctx), // const char *function_name
Type::getInt32Ty(*Ctx), // uint32_t func_checksum
Type::getInt8Ty(*Ctx), // uint8_t use_extra_checksum
Type::getInt32Ty(*Ctx), // uint32_t cfg_checksum
};
@ -813,11 +825,12 @@ Function *GCOVProfiler::insertCounterWriteout(
Builder.getInt32(CfgChecksum));
for (unsigned j = 0, e = CountersBySP.size(); j != e; ++j) {
DISubprogram SP(CountersBySP[j].second);
Builder.CreateCall4(
Builder.CreateCall5(
EmitFunction, Builder.getInt32(j),
Options.FunctionNamesInData ?
Builder.CreateGlobalStringPtr(getFunctionName(SP)) :
Constant::getNullValue(Builder.getInt8PtrTy()),
Builder.getInt32(Funcs[j]->getFuncChecksum()),
Builder.getInt8(Options.UseCfgChecksum),
Builder.getInt32(CfgChecksum));