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| author | Anna Zaks <ganna@apple.com> | 2015-06-25 23:35:48 +0000 |
|---|---|---|
| committer | Anna Zaks <ganna@apple.com> | 2015-06-25 23:35:48 +0000 |
| commit | 785c075786afef3863c00b3691bab4c678a19fb3 (patch) | |
| tree | e1271d49ac72eb207e00679095cd33c08afce1d9 /llvm/lib/Transforms | |
| parent | 4f652b69b110de48e07ea334f4d41f83bc4784b2 (diff) | |
| download | bcm5719-llvm-785c075786afef3863c00b3691bab4c678a19fb3.tar.gz bcm5719-llvm-785c075786afef3863c00b3691bab4c678a19fb3.zip | |
[asan] Do not instrument special purpose LLVM sections.
Do not instrument globals that are placed in sections containing "__llvm"
in their name.
This fixes a bug in ASan / PGO interoperability. ASan interferes with LLVM's
PGO, which places its globals into a special section, which is memcpy-ed by
the linker as a whole. When those goals are instrumented, ASan's memcpy wrapper
reports an issue.
http://reviews.llvm.org/D10541
llvm-svn: 240723
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp index ff4368198be..92b13c49ede 100644 --- a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp +++ b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp @@ -1144,6 +1144,8 @@ bool AddressSanitizerModule::ShouldInstrumentGlobal(GlobalVariable *G) { // Globals from llvm.metadata aren't emitted, do not instrument them. if (Section == "llvm.metadata") return false; + // Do not instrument globals from special LLVM sections. + if (Section.find("__llvm") != StringRef::npos) return false; // Callbacks put into the CRT initializer/terminator sections // should not be instrumented. |
