Kostya Serebryany
0cd695bd39
[tsan] Atomic support for ThreadSanitizer, patch by Dmitry Vyukov
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llvm-svn: 155698
2012-04-27 07:31:53 +00:00
Kostya Serebryany
3047a70ed9
[tsan] two more compile-time optimizations:
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- don't isntrument reads from constant globals.
Saves ~1.5% of instrumented instructions on CPU2006
(counting static instructions, not their execution).
- don't insrument reads from vtable (which is a global constant too).
Saves ~5%.
I did not measure the run-time impact of this,
but it is certainly non-negative.
llvm-svn: 154444
2012-04-10 22:29:17 +00:00
Kostya Serebryany
01d463472d
[tsan] compile-time instrumentation: do not instrument a read if
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a write to the same temp follows in the same BB.
Also add stats printing.
On Spec CPU2006 this optimization saves roughly 4% of instrumented reads
(which is 3% of all instrumented accesses):
Writes : 161216
Reads : 446458
Reads-before-write: 18295
llvm-svn: 154418
2012-04-10 18:18:56 +00:00
Kostya Serebryany
605c594f4f
[tsan] treat vtable pointer updates in a special way (requires tbaa); fix a bug (forgot to return true after instrumenting); make sure the tsan tests are run
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llvm-svn: 153448
2012-03-26 17:35:03 +00:00
Kostya Serebryany
f5088bb8a5
[asan] move x86-specific test to a separate X86 directory with a custom lit.local.cfg file
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llvm-svn: 152567
2012-03-12 18:49:11 +00:00
Eli Bendersky
4afdeeb682
Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.
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Patch reviewed by Daniel Dunbar. It will be followed by additional cleanup patches.
llvm-svn: 150664
2012-02-16 06:28:33 +00:00
Kostya Serebryany
457b375949
[asan] fix asan-vs-gvn.ll test (it did not actually check much before this change)
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llvm-svn: 150441
2012-02-14 00:02:35 +00:00
Kostya Serebryany
5cd1e1380f
ThreadSanitizer, a race detector. First LLVM commit.
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Clang patch (flags) will follow shortly.
The run-time library will also follow, but not immediately.
llvm-svn: 150423
2012-02-13 22:50:51 +00:00
Kostya Serebryany
2de61e1628
[asan] unpoison the stack before every noreturn call. Fixes asan issue 37. llvm part
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llvm-svn: 150102
2012-02-08 21:36:17 +00:00
Kostya Serebryany
f4be131943
The patch resolves the conflict between AddressSanitizer and load widening (GVN).
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The problem initially reported by Mozilla folks (http://code.google.com/p/address-sanitizer/issues/detail?id=20 ),
but it also prevents us from enabling LLVM bootstrap with AddressSanitizer.
llvm-svn: 149925
2012-02-06 22:48:56 +00:00
Kostya Serebryany
ca8b911b2d
[asan] enable asan only for the functions that have Attribute::AddressSafety
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llvm-svn: 148846
2012-01-24 19:34:43 +00:00
Kostya Serebryany
c69557e758
[asan] one more test for asan instrumentation: (*a)++ should be instrumented only once.
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llvm-svn: 147509
2012-01-04 01:02:14 +00:00
Kostya Serebryany
c78b00cab4
[asan] add a test for instrumenting globals
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llvm-svn: 146718
2011-12-16 01:28:19 +00:00
Kostya Serebryany
908509d41a
[asan] do not instrument threadlocal globals, this is buggy
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llvm-svn: 145092
2011-11-23 02:10:54 +00:00
Kostya Serebryany
3a83736893
[asan] workaround for reg alloc bug 11395: don't instrument functions with large chunks of inline assembler
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llvm-svn: 144962
2011-11-18 01:41:06 +00:00
Kostya Serebryany
3b8d362511
fall back to explicit list of allowed linkages when instrumenting globals in asan; add a test check that asan does not touch linkonce_odr
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llvm-svn: 144933
2011-11-17 23:14:59 +00:00
Kostya Serebryany
4105068ea9
AddressSanitizer, first commit (compiler module only)
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llvm-svn: 144758
2011-11-16 01:35:23 +00:00
