maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[sancov] Don't instrument MSVC CRT stdio config helpers 

They get called before initialization, which is a problem for winasan.

Test coming in compiler-rt.

llvm-svn: 286615
This commit is contained in:
Reid Kleckner 2016-11-11 19:18:45 +00:00
parent bfb371a083
commit ec80354873
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
View File

@ -448,6 +448,11 @@ bool SanitizerCoverageModule::runOnFunction(Function &F) {
return false; // Should not instrument sanitizer init functions.
if (F.getName().startswith("__sanitizer_"))
return false; // Don't instrument __sanitizer_* callbacks.
// Don't instrument MSVC CRT configuration helpers. They may run before normal
// initialization.
if (F.getName() == "__local_stdio_printf_options" ||
F.getName() == "__local_stdio_scanf_options")
return false;
// Don't instrument functions using SEH for now. Splitting basic blocks like
// we do for coverage breaks WinEHPrepare.
// FIXME: Remove this when SEH no longer uses landingpad pattern matching.