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7bce462c15
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73 Commits

Author SHA1 Message Date
Kostya Serebryany
7bce462c15 [tsan] disable load widening in ThreadSanitizer mode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175034 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-02-13 05:59:45 +00:00
Kostya Serebryany
f28e3211a6 [asan] fix tests for the new ABI 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174959 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-02-12 11:14:24 +00:00
Evgeniy Stepanov
647c66e24d [msan] Mostly disable msan-handle-icmp-exact. 
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
 2013-01-28 11:42:28 +00:00
Evgeniy Stepanov
351f65d972 [msan] Implement exact shadow propagation for relational ICmp. 
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
 2013-01-25 15:31:10 +00:00
Kostya Serebryany
63f0846f1e [asan] adaptive redzones for globals (the larger the global the larger is the redzone) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173335 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-01-24 10:35:40 +00:00
Evgeniy Stepanov
4247b13252 [msan] Do not insert check on volatile store. 
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
 2013-01-22 12:30:52 +00:00
Alexey Samsonov
19cd7e9ce2 ASan: wrap mapping scale and offset in a struct and make it a member of ASan passes. Add test for non-default mapping scale and offset. No functionality change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172610 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-01-16 13:23:28 +00:00
Evgeniy Stepanov
111877dd12 [msan] Temporarily remove ICmpEQ tests. 
They are failing on the bots.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172540 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-01-15 17:12:04 +00:00
Evgeniy Stepanov
967a946cb4 [msan] Fix handling of equality comparison of pointer vectors. 
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
 2013-01-15 16:44:52 +00:00
Peter Collingbourne
03de2a621c [msan] Change va_start/va_copy shadow memset alignment to 8. 
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
 2013-01-10 22:36:33 +00:00
Alexey Samsonov
1c8b825c43 [ASan] Fix lifetime intrinsics handling. Now for each intrinsic we check if it describes one of 'interesting' allocas. Assume that allocas can go through casts and phi-nodes before apperaring as llvm.lifetime arguments 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171153 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-27 08:50:58 +00:00
Evgeniy Stepanov
b53be53c72 [msan] Raise alignment of origin stores/loads when possible. 
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 11:55:09 +00:00
Evgeniy Stepanov
59a65f7b24 [msan] Fix handling of vectors of pointers. 
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 16:04:38 +00:00
Evgeniy Stepanov
6607716368 [msan] Fix handling of select with vector condition. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171069 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-25 14:56:21 +00:00
Evgeniy Stepanov
3333e66822 [msan] Remove unreachable blocks before instrumenting a function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170883 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-21 11:18:49 +00:00
Evgeniy Stepanov
b8837ab8fc [msan] Heuristically instrument unknown intrinsics. 
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
 2012-12-19 11:22:04 +00:00
Evgeniy Stepanov
63cca4e2fd [msan] Origin stores and loads do not need explicit alignment. 
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 13:43:11 +00:00
Alexey Samsonov
1afbb51796 Improve debug info generated with enabled AddressSanitizer. 
When ASan replaces <alloca instruction> with
<offset into a common large alloca>, it should also patch
llvm.dbg.declare calls and replace debug info descriptors to mark
that we've replaced alloca with a value that stores an address
of the user variable, not the user variable itself.

See PR11818 for more context.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169984 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-12 14:31:53 +00:00
Evgeniy Stepanov
4031b194ac [msan] Do not store origin for clean values. 
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
 2012-12-06 11:41:03 +00:00
Evgeniy Stepanov
1e3b656be5 [msan] Instrument bswap intrinsic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169383 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-05 14:39:55 +00:00
Evgeniy Stepanov
61cac0619a [msan] Change linkage type of __msan_track_origins. 
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
 2012-12-05 12:49:41 +00:00
Evgeniy Stepanov
f76bd101fe Improve MSan tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169256 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-04 11:42:05 +00:00
Alexey Samsonov
f985f44b13 ASan: add initial support for handling llvm.lifetime intrinsics in ASan - emit calls into runtime library that poison memory for local variables when their lifetime is over and unpoison memory when their lifetime begins. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169200 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-04 01:34:23 +00:00
Evgeniy Stepanov
98c63d0e1c [msan] Tests for vector manipulation instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168997 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-30 12:12:20 +00:00
Evgeniy Stepanov
84af05e1ba [msan] Propagate shadow through (x<0) and (x>=0) comparisons. 
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 14:25:47 +00:00
Evgeniy Stepanov
3a10b49781 [msan] Fix shadow & origin store & load alignment. 
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 14:05:53 +00:00
Evgeniy Stepanov
323c3acf51 [msan] Add a test for r168873. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168877 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-29 13:11:09 +00:00
Evgeniy Stepanov
f29865d9bb [msan] Update tests (broken in r168873). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168874 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-29 12:43:56 +00:00
Evgeniy Stepanov
aa4f97d6ed Initial commit of MemorySanitizer. 
Compiler pass only.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168866 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-29 09:57:20 +00:00
Kostya Serebryany
5085eb80ab [asan] when checking the noreturn attribute on the call, also check it on the callee 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168861 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-29 08:57:20 +00:00
Kostya Serebryany
1416edc30a [asan] Split AddressSanitizer into two passes (FunctionPass, ModulePass), LLVM part. This requires a clang part which will follow. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168781 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-28 10:31:36 +00:00
Dmitry Vyukov
b10675ef14 tsan: instrument atomic nand operation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168684 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-27 08:09:25 +00:00
Dmitry Vyukov
6702e53926 [tsan] add fail order to compare_exchange 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168586 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-26 11:36:19 +00:00
Kostya Serebryany
407790604b [asan] don't instrument linker-initialized globals even with external linkage in -asan-initialization-order mode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168367 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-20 13:11:32 +00:00
Kostya Serebryany
ca23d43084 [asan] make sure that linker-initialized globals (non-extern) are not instrumented even in -asan-initialization-order mode. This time with a test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168366 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-20 13:00:01 +00:00
Dmitry Vyukov
c2e9ca15fb tsan: switch to new memory_order constants (ABI compatible) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167615 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-09 14:12:16 +00:00
Dmitry Vyukov
9f8a90b3ce tsan: instrument all atomics (including fetch_add, exchange, cas, etc) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167612 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-09 12:55:36 +00:00
Kostya Serebryany
a5f54f1443 [asan] don't instrument globals that we've created ourselves (reduces the binary size a bit) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167230 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-01 13:42:40 +00:00
Kostya Serebryany
bd0052a0f2 [asan] make sure asan erases old unused allocas after it created a new one. This became important after the recent move from ModulePass to FunctionPass because no cleanup is happening after asan pass any more. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166267 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-19 06:20:53 +00:00
Kostya Serebryany
2611eeda98 [asan] fix a test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165938 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-15 14:30:30 +00:00
Dmitry Vyukov
6afc7cbdfe tsan: update the test for new atomic enums 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165109 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-03 13:19:20 +00:00
Dmitry Vyukov
03fe214515 tsan: update the test for new atomic enums 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165108 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-03 13:13:54 +00:00
Sylvestre Ledru
94c22716d6 Revert 'Fix a typo 'iff' => 'if''. iff is an abreviation of if and only if. See: http://en.wikipedia.org/wiki/If_and_only_if Commit 164767 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164768 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-09-27 10:14:43 +00:00
Sylvestre Ledru
7e2c793a2b Fix a typo 'iff' => 'if' 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164767 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-09-27 09:59:43 +00:00
Kostya Serebryany
9b9f87a87a [asan] add code to detect global initialization fiasco in C/C++. The sub-pass is off by default for now. Patch by Reid Watson. Note: this patch changes the interface between LLVM and compiler-rt parts of asan. The corresponding patch to compiler-rt will follow. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162268 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-08-21 08:24:25 +00:00
Kostya Serebryany
e60da02281 [asan] insert crash basic blocks inline as opposed to inserting them at the end of the function. This doesn't seem to fix or break anything, but is considered to be more friendly to downstream passes (test change) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161871 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-08-14 14:05:50 +00:00
Nuno Lopes
6e699bf38d revert r160742: it's breaking CMake build 
original commit msg:
MemoryBuiltins: add support to determine the size of strdup'ed non-constant strings

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160751 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-25 18:49:28 +00:00
Nuno Lopes
e3094283e3 MemoryBuiltins: add support to determine the size of strdup'ed non-constant strings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160742 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-25 17:29:22 +00:00
Nuno Lopes
c606c3ff91 baby steps toward fixing some problems with inbound GEPs that overflow, as discussed 2 months ago or so. 
Make sure we do not emit index computations with NSW flags so that we dont get an undef value if the GEP overflows

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160589 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-20 23:07:40 +00:00
Nuno Lopes
78435f6bb7 move the bounds checking pass to the instrumentation folder, where it belongs. I dunno why in the world I dropped it in the Scalar folder in the first place. 
No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160587 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-20 22:39:33 +00:00