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12 Commits

Author SHA1 Message Date
Sergey Matveev 6eff11e714 [msan] Common flags in MSan. 
llvm-svn: 181194
 2013-05-06 13:15:14 +00:00
Evgeniy Stepanov c7af878a01 [msan] Conditionally disable new() and delete() wrappers. 
To be used with static libstdc++.

llvm-svn: 178866
 2013-04-05 12:03:47 +00:00
Evgeniy Stepanov fe0199ea54 [msan] Options for switching between fast and cfi unwinders in run time. 
Does not change default behavior.

llvm-svn: 177057
 2013-03-14 11:47:03 +00:00
Reid Kleckner c9d382b5a4 [msan] intercept dlopen and clear shadow for it 
Summary:
The loader does not call mmap() through the PLT because it has to
bootstrap the process before libc is present.  Hooking dlopen() isn't
enough either because the loader runs module initializers before
returning, and they could run arbitrary msan instrumented code.

If msandr is present, then we can intercept the mmaps from dlopen at the
syscall layer and clear the shadow there.  If msandr is missing, we
clear the shadow after dlopen() and hope any initializers are trivial.

Reviewers: eugenis

CC: kcc, llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D509

llvm-svn: 176818
 2013-03-11 18:07:42 +00:00
Reid Kleckner 063dfe3244 [msan] Block reports from interceptors during _Unwind_Backtrace 
Summary:
I'm hitting a big recursive report from:
  uninit on strlen ->
  __msan::PrintWarningWithOrigin() ->
  __msan::GetStackTrace() ->
  __sanitizer::StackTrace::SlowUnwindStack() ->
  _Unwind_Backtrace() ->
  ... libgcc calls ->
  uninit on strlen() ->
  ... repeats

Reviewers: eugenis

Differential Revision: http://llvm-reviews.chandlerc.com/D497

llvm-svn: 176555
 2013-03-06 16:11:58 +00:00
Evgeniy Stepanov 76dc3a81ea [msan] Use slow stack unwinder in UMR reports. 
llvm-svn: 175510
 2013-02-19 12:43:18 +00:00
Kostya Serebryany ec87e785a3 [msan] don't check shadow inside interceptors if we are inside symbolizer; add weak function __msan_default_options that overrides default options 
llvm-svn: 175040
 2013-02-13 07:19:47 +00:00
Evgeniy Stepanov eac7f934f0 [msan] Cleanup public interface header. 
Moved everything users are not supposed to use to a private interface header.
Documented all public interfaces. Made them safe to use even if built without
MemorySanitizer.

llvm-svn: 173800
 2013-01-29 14:33:29 +00:00
Evgeniy Stepanov 9b52ce94db [msan] Set program exit code in keep-going mode. 
llvm-svn: 172057
 2013-01-10 11:17:55 +00:00
Evgeniy Stepanov 367dc64563 [msan] Refactor report printing. 
llvm-svn: 171105
 2012-12-26 09:32:05 +00:00
Evgeniy Stepanov 6722716d78 [msan] Fix header comments. 
llvm-svn: 171059
 2012-12-25 11:53:51 +00:00
Evgeniy Stepanov c5033786ba [msan] MemorySanitizer runtime. 
Initial commit of the MemorySanitizer runtime library.

llvm-svn: 169858
 2012-12-11 12:27:27 +00:00