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[tsan] add 3 internal flags for fine-grain control of what is instrumented and what is not.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165204 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany 2012-10-04 05:28:50 +00:00
parent 266eff8539
commit 41d876cea3
1 changed files with 18 additions and 7 deletions
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25
lib/Transforms/Instrumentation/ThreadSanitizer.cpp
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@ -47,6 +47,15 @@ using namespace llvm;
static cl::opt<std::string> ClBlackListFile("tsan-blacklist",
cl::desc("Blacklist file"), cl::Hidden);
static cl::opt<bool> ClInstrumentMemoryAccesses(
"tsan-instrument-memory-accesses", cl::init(true),
cl::desc("Instrument memory accesses"), cl::Hidden);
static cl::opt<bool> ClInstrumentFuncEntryExit(
"tsan-instrument-func-entry-exit", cl::init(true),
cl::desc("Instrument function entry and exit"), cl::Hidden);
static cl::opt<bool> ClInstrumentAtomics(
"tsan-instrument-atomics", cl::init(true),
cl::desc("Instrument atomics"), cl::Hidden);
STATISTIC(NumInstrumentedReads, "Number of instrumented reads");
STATISTIC(NumInstrumentedWrites, "Number of instrumented writes");
@ -284,17 +293,19 @@ bool ThreadSanitizer::runOnFunction(Function &F) {
// (e.g. variables that do not escape, etc).
// Instrument memory accesses.
for (size_t i = 0, n = AllLoadsAndStores.size(); i < n; ++i) {
Res |= instrumentLoadOrStore(AllLoadsAndStores[i]);
}
if (ClInstrumentMemoryAccesses)
for (size_t i = 0, n = AllLoadsAndStores.size(); i < n; ++i) {
Res |= instrumentLoadOrStore(AllLoadsAndStores[i]);
}
// Instrument atomic memory accesses.
for (size_t i = 0, n = AtomicAccesses.size(); i < n; ++i) {
Res |= instrumentAtomic(AtomicAccesses[i]);
}
if (ClInstrumentAtomics)
for (size_t i = 0, n = AtomicAccesses.size(); i < n; ++i) {
Res |= instrumentAtomic(AtomicAccesses[i]);
}
// Instrument function entry/exit points if there were instrumented accesses.
if (Res || HasCalls) {
if ((Res || HasCalls) && ClInstrumentFuncEntryExit) {
IRBuilder<> IRB(F.getEntryBlock().getFirstNonPHI());
Value *ReturnAddress = IRB.CreateCall(
Intrinsic::getDeclaration(F.getParent(), Intrinsic::returnaddress),