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| author | Kostya Serebryany <kcc@google.com> | 2016-07-14 17:59:01 +0000 |
|---|---|---|
| committer | Kostya Serebryany <kcc@google.com> | 2016-07-14 17:59:01 +0000 |
| commit | dd5c7f9313ca9b1ec9c4f49c1af03d2835f02ac1 (patch) | |
| tree | ed02dddd8fb00dc81d5ed04b0a730f1a5829a629 /llvm/lib | |
| parent | cb7d6e955d74fc58b1a537023aef0f566d412c42 (diff) | |
| download | bcm5719-llvm-dd5c7f9313ca9b1ec9c4f49c1af03d2835f02ac1.tar.gz bcm5719-llvm-dd5c7f9313ca9b1ec9c4f49c1af03d2835f02ac1.zip | |
[sanitizer-coverage] make sure that calls to __sanitizer_cov_trace_pc are not merged (otherwise different calls get the same PC and confuse fuzzers)
llvm-svn: 275449
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp index 1315e19732f..7d404473655 100644 --- a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp +++ b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp @@ -544,7 +544,8 @@ void SanitizerCoverageModule::InjectCoverageAtBlock(Function &F, BasicBlock &BB, Type *Int32PtrTy = PointerType::getUnqual(IRB.getInt32Ty()); GuardP = IRB.CreateIntToPtr(GuardP, Int32PtrTy); if (Options.TracePC) { - IRB.CreateCall(SanCovTracePC); + IRB.CreateCall(SanCovTracePC); // gets the PC using GET_CALLER_PC. + IRB.CreateCall(EmptyAsm, {}); // Avoids callback merge. } else if (Options.TraceBB) { IRB.CreateCall(IsEntryBB ? SanCovTraceEnter : SanCovTraceBB, GuardP); } else if (UseCalls) { |
