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* [msan] Propagate origin for insertvalue, extractvalue.Evgeniy Stepanov2013-11-111-0/+26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194374 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix handling of scalar select of vectors.Evgeniy Stepanov2013-10-141-0/+19
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192575 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Handling of atomic load/store, atomic rmw, cmpxchg.Evgeniy Stepanov2013-09-241-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191287 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix handling of select with struct arguments.Evgeniy Stepanov2013-09-031-0/+13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189796 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix select instrumentation.Evgeniy Stepanov2013-09-031-0/+9
| | | | | | | | Select condition shadow was being ignored resulting in false negatives. This change OR-s sign-extended condition shadow into the result shadow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189785 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix handling of va_arg overflow area on x86_64.Evgeniy Stepanov2013-08-231-0/+25
| | | | | | | | | | The code was erroneously reading overflow area shadow from the TLS slot, bypassing the local copy. Reading shadow directly from TLS is wrong, because it can be overwritten by a nested vararg call, if that happens before va_start. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189104 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Unpoison stack allocations and undef values in blacklisted functions.Evgeniy Stepanov2013-07-031-0/+35
| | | | | | | | | This changes behavior of -msan-poison-stack=0 flag from not poisoning stack allocations to actively unpoisoning them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185538 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Handle mixed track-origins and keep-going settings (llvm part).Evgeniy Stepanov2013-05-311-2/+3
| | | | | | | | | | | | | | | Before this change, each module defined a weak_odr global __msan_track_origins with a value of 1 if origin tracking is enabled, 0 if disabled. If there are modules with different values, any of them may win. If 0 wins, and there is at least one module with 1, the program will most likely crash. With this change, __msan_track_origins is only emitted if origin tracking is on. Then runtime library detects if there is at least one module with origin tracking, and enables runtime support for it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182997 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix argument shadow alignment.Evgeniy Stepanov2013-05-281-0/+40
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182771 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] A no-op implementation of VarArg handling.Evgeniy Stepanov2013-05-211-0/+1
| | | | | | | | This stuff is used on platforms where MSan does not have a proper VarArg implementation (anything other than x86_64 at the moment). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182375 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Switch TLS globals to initial-exec model.Evgeniy Stepanov2013-05-161-1/+10
| | | | | | | They are always defined in the main executable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181994 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Implement sanitize_memory attribute.Evgeniy Stepanov2013-02-281-35/+62
| | | | | | | | | | | Shadow checks are disabled and memory loads always produce fully initialized values in functions that don't have a sanitize_memory attribute. Value and argument shadow is propagated as usual. This change also updates blacklist behaviour to match the above. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176247 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Mostly disable msan-handle-icmp-exact.Evgeniy Stepanov2013-01-281-20/+11
| | | | | | | | | It is way too slow. Change the default option value to 0. Always do exact shadow propagation for unsigned ICmp with constants, it is cheap (under 1% cpu time) and required for correctness. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173682 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Implement exact shadow propagation for relational ICmp.Evgeniy Stepanov2013-01-251-3/+31
| | | | | | | | | Only for integers, pointers, and vectors of those. No floats. Instrumentation seems very heavy, and may need to be replaced with some approximation in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173452 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Do not insert check on volatile store.Evgeniy Stepanov2013-01-221-0/+14
| | | | | | | Volatile bitfields can cause valid stores of uninitialized bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173153 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Temporarily remove ICmpEQ tests.Evgeniy Stepanov2013-01-151-54/+0
| | | | | | | They are failing on the bots. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172540 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix handling of equality comparison of pointer vectors.Evgeniy Stepanov2013-01-151-0/+70
| | | | | | | Also improve test coveration of the handling of relational comparisons. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172539 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Change va_start/va_copy shadow memset alignment to 8.Peter Collingbourne2013-01-101-0/+13
| | | | | | | | | This fixes va_start/va_copy of a va_list field which happens to not be laid out at a 16-byte boundary. Differential Revision: http://llvm-reviews.chandlerc.com/D276 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172128 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Raise alignment of origin stores/loads when possible.Evgeniy Stepanov2012-12-261-2/+9
| | | | | | | | | Origin alignment is as high as the alignment of the corresponding application location, but never less than 4. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171110 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix handling of vectors of pointers.Evgeniy Stepanov2012-12-251-0/+15
| | | | | | | | VectorType::getInteger() can not be used with them, because pointer size depends on the target. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171070 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix handling of select with vector condition.Evgeniy Stepanov2012-12-251-0/+17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171069 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Heuristically instrument unknown intrinsics.Evgeniy Stepanov2012-12-191-2/+74
| | | | | | | | | | | | | This changes adds shadow and origin propagation for unknown intrinsics by examining the arguments and ModRef behaviour. For now, only 3 classes of intrinsics are handled: - those that look like simple SIMD store - those that look like simple SIMD load - those that don't have memory effects and look like arithmetic/logic/whatever operation on simple types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170530 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Origin stores and loads do not need explicit alignment.Evgeniy Stepanov2012-12-141-0/+30
| | | | | | | Origin address is always 4 byte aligned, and the access type is always i32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170199 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Do not store origin for clean values.Evgeniy Stepanov2012-12-061-0/+26
| | | | | | | | | | | | | | | | | | | Instead of unconditionally storing origin with every application store, only do this when the shadow of the stored value is != 0. This change also delays instrumentation of stores until after the walk over function's instructions, because adding new basic blocks confuses InstVisitor. We only keep 1 origin value per 4 bytes of application memory. This change fixes the bug when a store of a single clean byte wiped the origin for the whole 4-byte area. Since stores of uninitialized values are relatively uncommon, this change improves performance of track-origins mode by 5% median and by up to 47% on specs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169490 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Instrument bswap intrinsic.Evgeniy Stepanov2012-12-051-0/+16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169383 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Change linkage type of __msan_track_origins.Evgeniy Stepanov2012-12-051-0/+3
| | | | | | | | LinkOnceODRLinkage globals may be removed in GlobalOpt if not used in the current module. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169377 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve MSan tests.Evgeniy Stepanov2012-12-041-54/+60
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169256 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Tests for vector manipulation instructions.Evgeniy Stepanov2012-11-301-0/+37
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168997 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Propagate shadow through (x<0) and (x>=0) comparisons.Evgeniy Stepanov2012-11-291-0/+47
| | | | | | | | This is a special case of signed relational comparison where result only depends on the sign of x. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168881 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix shadow & origin store & load alignment.Evgeniy Stepanov2012-11-291-0/+25
| | | | | | | | This change ensures that shadow memory accesses have the same alignment as corresponding app memory accesses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168880 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Add a test for r168873.Evgeniy Stepanov2012-11-291-0/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168877 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Update tests (broken in r168873).Evgeniy Stepanov2012-11-291-5/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168874 91177308-0d34-0410-b5e6-96231b3b80d8
* Initial commit of MemorySanitizer.Evgeniy Stepanov2012-11-291-0/+235
Compiler pass only. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168866 91177308-0d34-0410-b5e6-96231b3b80d8
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