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2 Commits

Author SHA1 Message Date
Evgeniy Stepanov
6ce4a9f175 [msan] Fix bad interaction between with-calls mode and chained origin tracking. 
Origin history should only be recorded for uninitialized values, because it is
meaningless otherwise. This change moves __msan_chain_origin to the runtime
library side and makes it conditional on the corresponding shadow value.

Previous code was correct, but _very_ inefficient.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211700 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-06-25 14:41:57 +00:00
Evgeniy Stepanov
f19e327319 [msan] Add -msan-instrumentation-with-call-threshold. 
This flag replaces inline instrumentation for checks and origin stores with
calls into MSan runtime library. This is a workaround for PR17409.

Disabled by default.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206585 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-04-18 12:17:20 +00:00