// The rest is handled by the run-time library.
//===----------------------------------------------------------------------===//
+#include "llvm/Transforms/Instrumentation/ThreadSanitizer.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
namespace {
/// ThreadSanitizer: instrument the code in module to find races.
-struct ThreadSanitizer : public FunctionPass {
- ThreadSanitizer() : FunctionPass(ID) {}
- StringRef getPassName() const override;
- void getAnalysisUsage(AnalysisUsage &AU) const override;
- bool runOnFunction(Function &F) override;
- bool doInitialization(Module &M) override;
- static char ID; // Pass identification, replacement for typeid.
-
- private:
+///
+/// Instantiating ThreadSanitizer inserts the tsan runtime library API function
+/// declarations into the module if they don't exist already. Instantiating
+/// ensures the __tsan_init function is in the list of global constructors for
+/// the module.
+struct ThreadSanitizer {
+ ThreadSanitizer(Module &M);
+ bool sanitizeFunction(Function &F, const TargetLibraryInfo &TLI);
+
+private:
void initializeCallbacks(Module &M);
bool instrumentLoadOrStore(Instruction *I, const DataLayout &DL);
bool instrumentAtomic(Instruction *I, const DataLayout &DL);
Function *MemmoveFn, *MemcpyFn, *MemsetFn;
Function *TsanCtorFunction;
};
+
+struct ThreadSanitizerLegacyPass : FunctionPass {
+ ThreadSanitizerLegacyPass() : FunctionPass(ID) {}
+ StringRef getPassName() const override;
+ void getAnalysisUsage(AnalysisUsage &AU) const override;
+ bool runOnFunction(Function &F) override;
+ bool doInitialization(Module &M) override;
+ static char ID; // Pass identification, replacement for typeid.
+private:
+ Optional<ThreadSanitizer> TSan;
+};
} // namespace
-char ThreadSanitizer::ID = 0;
-INITIALIZE_PASS_BEGIN(
- ThreadSanitizer, "tsan",
- "ThreadSanitizer: detects data races.",
- false, false)
+PreservedAnalyses ThreadSanitizerPass::run(Function &F,
+ FunctionAnalysisManager &FAM) {
+ ThreadSanitizer TSan(*F.getParent());
+ if (TSan.sanitizeFunction(F, FAM.getResult<TargetLibraryAnalysis>(F)))
+ return PreservedAnalyses::none();
+ return PreservedAnalyses::all();
+}
+
+char ThreadSanitizerLegacyPass::ID = 0;
+INITIALIZE_PASS_BEGIN(ThreadSanitizerLegacyPass, "tsan",
+ "ThreadSanitizer: detects data races.", false, false)
INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
-INITIALIZE_PASS_END(
- ThreadSanitizer, "tsan",
- "ThreadSanitizer: detects data races.",
- false, false)
+INITIALIZE_PASS_END(ThreadSanitizerLegacyPass, "tsan",
+ "ThreadSanitizer: detects data races.", false, false)
-StringRef ThreadSanitizer::getPassName() const { return "ThreadSanitizer"; }
+StringRef ThreadSanitizerLegacyPass::getPassName() const {
+ return "ThreadSanitizerLegacyPass";
+}
-void ThreadSanitizer::getAnalysisUsage(AnalysisUsage &AU) const {
+void ThreadSanitizerLegacyPass::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<TargetLibraryInfoWrapperPass>();
}
-FunctionPass *llvm::createThreadSanitizerPass() {
- return new ThreadSanitizer();
+bool ThreadSanitizerLegacyPass::doInitialization(Module &M) {
+ TSan.emplace(M);
+ return true;
+}
+
+bool ThreadSanitizerLegacyPass::runOnFunction(Function &F) {
+ auto &TLI = getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
+ TSan->sanitizeFunction(F, TLI);
+ return true;
+}
+
+FunctionPass *llvm::createThreadSanitizerLegacyPassPass() {
+ return new ThreadSanitizerLegacyPass();
}
void ThreadSanitizer::initializeCallbacks(Module &M) {
IRB.getInt32Ty(), IntptrTy));
}
-bool ThreadSanitizer::doInitialization(Module &M) {
+ThreadSanitizer::ThreadSanitizer(Module &M) {
const DataLayout &DL = M.getDataLayout();
IntptrTy = DL.getIntPtrType(M.getContext());
- std::tie(TsanCtorFunction, std::ignore) = createSanitizerCtorAndInitFunctions(
- M, kTsanModuleCtorName, kTsanInitName, /*InitArgTypes=*/{},
- /*InitArgs=*/{});
-
- appendToGlobalCtors(M, TsanCtorFunction, 0);
-
- return true;
+ std::tie(TsanCtorFunction, std::ignore) =
+ getOrCreateSanitizerCtorAndInitFunctions(
+ M, kTsanModuleCtorName, kTsanInitName, /*InitArgTypes=*/{},
+ /*InitArgs=*/{},
+ // This callback is invoked when the functions are created the first
+ // time. Hook them into the global ctors list in that case:
+ [&](Function *Ctor, Function *) { appendToGlobalCtors(M, Ctor, 0); });
}
static bool isVtableAccess(Instruction *I) {
}
}
-bool ThreadSanitizer::runOnFunction(Function &F) {
+bool ThreadSanitizer::sanitizeFunction(Function &F,
+ const TargetLibraryInfo &TLI) {
// This is required to prevent instrumenting call to __tsan_init from within
// the module constructor.
if (&F == TsanCtorFunction)
bool HasCalls = false;
bool SanitizeFunction = F.hasFnAttribute(Attribute::SanitizeThread);
const DataLayout &DL = F.getParent()->getDataLayout();
- const TargetLibraryInfo *TLI =
- &getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
// Traverse all instructions, collect loads/stores/returns, check for calls.
for (auto &BB : F) {
LocalLoadsAndStores.push_back(&Inst);
else if (isa<CallInst>(Inst) || isa<InvokeInst>(Inst)) {
if (CallInst *CI = dyn_cast<CallInst>(&Inst))
- maybeMarkSanitizerLibraryCallNoBuiltin(CI, TLI);
+ maybeMarkSanitizerLibraryCallNoBuiltin(CI, &TLI);
if (isa<MemIntrinsic>(Inst))
MemIntrinCalls.push_back(&Inst);
HasCalls = true;
return std::make_pair(Ctor, InitFunction);
}
+std::pair<Function *, Function *>
+llvm::getOrCreateSanitizerCtorAndInitFunctions(
+ Module &M, StringRef CtorName, StringRef InitName,
+ ArrayRef<Type *> InitArgTypes, ArrayRef<Value *> InitArgs,
+ function_ref<void(Function *, Function *)> FunctionsCreatedCallback,
+ StringRef VersionCheckName) {
+ assert(!CtorName.empty() && "Expected ctor function name");
+
+ if (Function *Ctor = M.getFunction(CtorName))
+ // FIXME: Sink this logic into the module, similar to the handling of
+ // globals. This will make moving to a concurrent model much easier.
+ if (Ctor->arg_size() == 0 ||
+ Ctor->getReturnType() == Type::getVoidTy(M.getContext()))
+ return {Ctor, declareSanitizerInitFunction(M, InitName, InitArgTypes)};
+
+ Function *Ctor, *InitFunction;
+ std::tie(Ctor, InitFunction) = llvm::createSanitizerCtorAndInitFunctions(
+ M, CtorName, InitName, InitArgTypes, InitArgs, VersionCheckName);
+ FunctionsCreatedCallback(Ctor, InitFunction);
+ return std::make_pair(Ctor, InitFunction);
+}
+
Function *llvm::getOrCreateInitFunction(Module &M, StringRef Name) {
assert(!Name.empty() && "Expected init function name");
if (Function *F = M.getFunction(Name)) {
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