commit 3c767db3c5a6d96f5aed70bf5ab54cf60a6a2305
author Kostya Serebryany <kcc@google.com> Sat Feb 27 05:45:12 2016 +0000
committer Kostya Serebryany <kcc@google.com> Sat Feb 27 05:45:12 2016 +0000
tree 39afd22b7394240a7c42b12e979d91c694429144
parent 70b391864d75845e0537ad16a4b6a581aafcf592

[libFuzzer] don't emit callbacks to sanitizer run-time in -fsanitize-coverage=trace-pc mode; update libFuzzer doc for previous commit

llvm-svn: 262110

llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp

diff --git a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
index 124ae79..5bb0682 100644
--- a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -294,18 +294,20 @@
       new GlobalVariable(M, ModNameStrConst->getType(), true,
                          GlobalValue::PrivateLinkage, ModNameStrConst);
 
-  Function *CtorFunc;
-  std::tie(CtorFunc, std::ignore) = createSanitizerCtorAndInitFunctions(
-      M, kSanCovModuleCtorName, kSanCovModuleInitName,
-      {Int32PtrTy, IntptrTy, Int8PtrTy, Int8PtrTy},
-      {IRB.CreatePointerCast(RealGuardArray, Int32PtrTy),
-       ConstantInt::get(IntptrTy, N),
-       Options.Use8bitCounters
-           ? IRB.CreatePointerCast(RealEightBitCounterArray, Int8PtrTy)
-           : Constant::getNullValue(Int8PtrTy),
-       IRB.CreatePointerCast(ModuleName, Int8PtrTy)});
+  if (!Options.TracePC) {
+    Function *CtorFunc;
+    std::tie(CtorFunc, std::ignore) = createSanitizerCtorAndInitFunctions(
+        M, kSanCovModuleCtorName, kSanCovModuleInitName,
+        {Int32PtrTy, IntptrTy, Int8PtrTy, Int8PtrTy},
+        {IRB.CreatePointerCast(RealGuardArray, Int32PtrTy),
+          ConstantInt::get(IntptrTy, N),
+          Options.Use8bitCounters
+              ? IRB.CreatePointerCast(RealEightBitCounterArray, Int8PtrTy)
+              : Constant::getNullValue(Int8PtrTy),
+          IRB.CreatePointerCast(ModuleName, Int8PtrTy)});
 
-  appendToGlobalCtors(M, CtorFunc, kSanCtorAndDtorPriority);
+    appendToGlobalCtors(M, CtorFunc, kSanCtorAndDtorPriority);
+  }
 
   return true;
 }