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path: root/lib/Transforms/Instrumentation/MemorySanitizer.cpp
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2013-03-21[msan] Add an option to disable poisoning of shadow for undef values.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177630 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-28[msan] Implement sanitize_memory attribute.Evgeniy Stepanov
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
2013-02-28Remove unused leftover declarations.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176240 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-29Fixing warnings revealed by gcc release buildEdwin Vane
Fixed set-but-not-used warnings. Reviewer: gribozavr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173810 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-28[msan] Mostly disable msan-handle-icmp-exact.Evgeniy Stepanov
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
2013-01-28Revert r173678.Evgeniy Stepanov
Broken tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173679 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-28[msan] Make msan-handle-icmp-exact=0 by default.Evgeniy Stepanov
50% slowdown on one of the specs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173678 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-25[msan] A comment on ICmp handling logic.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173453 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-25[msan] Implement exact shadow propagation for relational ICmp.Evgeniy Stepanov
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
2013-01-23Use the AttributeSet when removing multiple attributes. Use Attribute::AttrKindBill Wendling
when removing one attribute. This further encapsulates the use of the attributes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173214 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-22[msan] Export the value of msan-keep-going flag for the runtime.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173156 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-22[msan] Do not insert check on volatile store.Evgeniy Stepanov
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
2013-01-19Sort all of the includes. Several files got checked in with mis-sortedChandler Carruth
includes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172891 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-18Move Blacklist.h to include/ to enable use from clang.Will Dietz
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172806 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-15[msan] Fix handling of equality comparison of pointer vectors.Evgeniy Stepanov
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
2013-01-10[msan] Change va_start/va_copy shadow memset alignment to 8.Peter Collingbourne
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
2013-01-02Actually update the CMake and Makefile builds correctly, and update theChandler Carruth
code that includes Intrinsics.gen directly. This never showed up in my testing because the old Intrinsics.gen was still kicking around in the make build system and was correct there. =[ Thankfully, some of the bots to clean rebuilds and that caught this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171373 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-02Move all of the header files which are involved in modelling the LLVM IRChandler Carruth
into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-28Add proper support for -fsanitize-blacklist= flag for TSan and MSan. LLVM part.Alexey Samsonov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171183 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-26[msan] Raise alignment of origin stores/loads when possible.Evgeniy Stepanov
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
2012-12-26[msan] Expand the file comment with track-origins info.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171109 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-25[msan] Fix handling of vectors of pointers.Evgeniy Stepanov
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
2012-12-25[msan] Fix handling of select with vector condition.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171069 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-21[msan] Remove unreachable blocks before instrumenting a function.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170883 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-19[msan] Add track-origins argument to the pass constructor.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170544 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-19[msan] Heuristically instrument unknown intrinsics.Evgeniy Stepanov
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
2012-12-19Rename the 'Attributes' class to 'Attribute'. It's going to represent a ↵Bill Wendling
single attribute in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170502 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-17[msan] Fix lint warning.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170347 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14Fix lint warnings in MemorySanitizer.cpp.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170203 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14[msan] Origin stores and loads do not need explicit alignment.Evgeniy Stepanov
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
2012-12-14[msan] Refactor default shadow propagation and origin tracking.Evgeniy Stepanov
This change moves the code for default shadow propagaition (handleShadowOr) and origin tracking (setOriginForNaryOp) into a new builder-like class. Also gets rid of handleShadowOrBinary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170192 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-11[msan] Use explicitely aligned stores and loads with function argument shadow.Evgeniy Stepanov
Use explicitely aligned store and load instructions to deal with argument and retval shadow. This matters when an argument's alignment is higher than __msan_param_tls alignment (which is the case with __m128i). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169859 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-07s/AttrListPtr/AttributeSet/g to better label what this class is going to be ↵Bill Wendling
in the near future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169651 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-07[msan] Remove readonly/readnone attributes from all called functions.Evgeniy Stepanov
MSan uses a TLS slot to pass shadow for function arguments and return values. This makes all instrumented functions not readonly, and at the same time requires that all callees of an instrumented function that may be MSan-instrumented do not have readonly attribute (otherwise some of the instrumentation may be optimized out). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169591 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06MemorySanitizer.cpp: Suppress a warning. [-Wunused-variable]NAKAMURA Takumi
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169504 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06[msan] Fix a typo in a comment.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169491 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06[msan] Do not store origin for clean values.Evgeniy Stepanov
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
2012-12-05[msan] Instrument bswap intrinsic.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169383 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-05[msan] Initialize callbacks in runOnFunction as opposed to doInitialization.Evgeniy Stepanov
This mirrors the change in ASan & TSan done in r168864. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169378 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-05[msan] Change linkage type of __msan_track_origins.Evgeniy Stepanov
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
2012-12-03Use the new script to sort the includes of every file under lib.Chandler Carruth
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-30Move the InstVisitor utility into VMCore where it belongs. It heavilyChandler Carruth
depends on the IR infrastructure, there is no sense in it being off in Support land. This is in preparation to start working to expand InstVisitor into more special-purpose visitors that are still generic and can be re-used across different passes. The expansion will go into the Analylis tree though as nothing in VMCore needs it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168972 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29Apply Takumi's patch to suppress unused-variable warnings in -Asserts builds.Matt Beaumont-Gay
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168911 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29[msan] Handle vector manipulation instructions.Evgeniy Stepanov
Handle insertelement, extractelement, shufflevector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168889 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29[msan] Fix getOriginForNaryOp.Evgeniy Stepanov
The old version failed on a 3-arg instruction with (-1, 0, 0) shadows (it would pick the 3rd operand origin irrespective of its shadow). The new version always picks the origin of the rightmost poisoned operand. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168887 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29[msan] Basic handling of inline asm.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168884 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29[msan] Propagate shadow through (x<0) and (x>=0) comparisons.Evgeniy Stepanov
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
2012-11-29[msan] Fix shadow & origin store & load alignment.Evgeniy Stepanov
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
2012-11-29[msan] Optimize getOriginPtr.Evgeniy Stepanov
Rewrite getOriginPtr in a way that lets subsequent optimizations factor out the common part of Shadow and Origin address calculation. Improves perf by up to 5%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168879 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29[msan] Fix a few compilation warnings.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168878 91177308-0d34-0410-b5e6-96231b3b80d8
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