f7ed23f744
[compiler-rt] Fix build (again) by wrapping lines to 80 chars (NFC)
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llvm-svn: 248979
2015-10-01 02:15:40 +00:00
59ba7b8cd1
[compiler-rt] Apply modernize-use-nullptr fixes in sanitizers
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- Trim spaces.
- Use nullptr in place of 0 for pointer variables.
- Use '!p' in place of 'p == 0' for null pointer checks.
- Add blank lines to separate function definitions.
- Add 'extern "C"' or 'namespace foo' comments after the appropriate
closing brackets
This is a continuation of work from 409b7b82. The focus here is on the
various sanitizers (not sanitizer_common, as before).
Patch by Eugene Zelenko!
Differential Revision: http://reviews.llvm.org/D13225
llvm-svn: 248966
2015-10-01 00:22:21 +00:00
cc45ee9a63
Try to fix the MSVC build now that we use /Zc:inline.
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Thanks to Majnemer for the help.
llvm-svn: 244786
2015-08-12 18:09:44 +00:00
63d9764585
[ASan] New approach to dynamic allocas unpoisoning. Patch by Max Ostapenko!
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Differential Revision: http://reviews.llvm.org/D7098
llvm-svn: 238401
2015-05-28 07:49:05 +00:00
f074b3c2de
[asan] Allow changing verbosity in activation flags.
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This change removes some debug output in asan_flags.cc that
was reading the verbosity level before all the flags were parsed.
llvm-svn: 226566
2015-01-20 13:21:20 +00:00
0545f4b0f3
[ASan] Change fake stack and local variables handling.
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This commit changes the way we get fake stack from ASan runtime
(to find use-after-return errors) and the way we represent local
variables:
- __asan_stack_malloc function now returns pointer to newly allocated
fake stack frame, or NULL if frame cannot be allocated. It doesn't
take pointer to real stack as an input argument, it is calculated
inside the runtime.
- __asan_stack_free function doesn't take pointer to real stack as
an input argument. Now this function is never called if fake stack
frame wasn't allocated.
- __asan_init version is bumped to reflect changes in the ABI.
- new flag "-asan-stack-dynamic-alloca" allows to store all the
function local variables in a dynamic alloca, instead of the static
one. It reduces the stack space usage in use-after-return mode
(dynamic alloca will not be called if the local variables are stored
in a fake stack), and improves the debug info quality for local
variables (they will not be described relatively to %rbp/%rsp, which
are assumed to be clobbered by function calls). This flag is turned
off by default for now, but I plan to turn it on after more
testing.
llvm-svn: 224063
2014-12-11 21:53:19 +00:00
e47130e407
[ASan] Get fake stack code working with GCC 4.8.2.
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Summary:
TestCases/Linux/heavy_uar_test.cc was failing on my
PowerPC64 box with GCC 4.8.2, because the compiler recognised
a memset-like loop and turned it into a call to memset, which
got intercepted by __asan_memset, which got upset because it was
being called on an address in high shadow memory.
Use break_optimization to stop the compiler from doing this.
Reviewers: kcc, samsonov
Reviewed By: kcc
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D6266
llvm-svn: 222572
2014-11-21 21:25:09 +00:00
1ee681305f
[asan] introduce two functions that will allow implementations of C++ garbage colection to work with asan's fake stack
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llvm-svn: 200908
2014-02-06 06:56:22 +00:00
1aedf6c9e6
[asan] replace the flag uar_stack_size_log with two flags min_uar_stack_size_log/max_uar_stack_size_log
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llvm-svn: 197370
2013-12-16 08:42:08 +00:00
57bfdb080b
[asan] add flag uar_noreserve to use noreserve mmap for fake stack. uar_noreserve=1 will save some memory but also negatively affect performance
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llvm-svn: 197233
2013-12-13 15:03:49 +00:00
e55d388e71
[asan] when a fake stack is being unmapped also flush the corresponding shadow
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llvm-svn: 197040
2013-12-11 14:26:41 +00:00
7a3a93f112
[asan] if verbosity>=2, print the fake stack usage stats at thread exit; No functionality change in non-verboze mode
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llvm-svn: 197037
2013-12-11 13:54:01 +00:00
9be70fbda9
[sanitizer] Introduce VReport and VPrintf macros and use them in sanitizer code.
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Instead of "if (common_flags()->verbosity) Report(...)" we now have macros.
llvm-svn: 196497
2013-12-05 12:04:51 +00:00
52ca74ec61
tsan: move verbosity flag to CommonFlags
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llvm-svn: 192701
2013-10-15 13:28:51 +00:00
43d90cbd86
[lsan] Support ASan's stack-use-after-return mode in LSan.
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Treat the fake stack as live memory.
llvm-svn: 192593
2013-10-14 14:04:50 +00:00
3c42ce1516
[asan] introduce run-time flag uar_stack_size_log to control the size of FakeStack; don't crash when the fake stack is exhausted, move some code to .cc file
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llvm-svn: 191510
2013-09-27 11:37:23 +00:00
c3d43ca3ec
[asan] add a run-time option detect_stack_use_after_return, add verbosity output for fake stack
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llvm-svn: 190932
2013-09-18 10:35:12 +00:00
2f5c2be6bd
[asan] further speedup use-after-return: simplify deallocation of fake frames. ~ 20% speedup.
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llvm-svn: 190852
2013-09-17 07:42:54 +00:00
3bee8efc95
[asan] Android does not have TLS
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llvm-svn: 190669
2013-09-13 08:58:22 +00:00
9583b87077
[asan] don't record the class_id in FakeFrame (scratching the last bits of performance)
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llvm-svn: 190666
2013-09-13 07:50:44 +00:00
4117bdbbbc
[asan] more performance to FakeStack: a) don't used atomic exchange, instead rely on regular load and store and other signal-safe logic; b) remove allocated_from_size_class_mask_ which is not helping much anyway; Another 10% speedup
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llvm-svn: 190664
2013-09-13 07:20:35 +00:00
43c4493b44
[asan] second attempt to use TLS with fake stack. This time it looks (more) async-signal safe.
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llvm-svn: 190663
2013-09-13 06:32:26 +00:00
c19851ab6c
[asan] undo the previous commit since TLS hack breaks with signals... :(
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llvm-svn: 190662
2013-09-13 06:15:02 +00:00
096413ba3b
[asan] use TLS on Linux to get the FakeStack. Saves 15% performance
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llvm-svn: 190661
2013-09-13 06:04:18 +00:00
77caab4d7b
[asan] inline PoisonShadow in FakeStack to get ~10% speedup
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llvm-svn: 190660
2013-09-13 05:57:58 +00:00
7638aa135e
[asan] a bit of performance improvement in fake stack, generalized one test, fixed android build of another test
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llvm-svn: 190606
2013-09-12 14:41:10 +00:00
627ea6391e
[asan] add a test for use-after-return and exceptions and fix it. Not 100% sure this is a complete fix, will keep looking for harder cases.
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llvm-svn: 190603
2013-09-12 13:25:29 +00:00
628cda7367
[asan] hopefully make the FakeStack async-signal safe, enable the related test
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llvm-svn: 190592
2013-09-12 08:34:50 +00:00
e8f961e847
[asan] use xchg instead of CAS in FakeStack::Allocate (5% faster for this case)
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llvm-svn: 190589
2013-09-12 07:28:42 +00:00
729c8dc65b
[asan] fully re-implement the FakeStack (use-after-return) to make it faster and async-signal-safe. The implementation is not yet complete (see FIXMEs) but the existing tests pass.
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llvm-svn: 190588
2013-09-12 07:11:58 +00:00
8fc35ca008
[asan] refactor the use-after-return API so that the size class is computed at compile time instead of at run-time. compiler-rt part
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llvm-svn: 190406
2013-09-10 13:16:26 +00:00
1f13414d45
[asan] make use-after-return handle very deep recursion; fixes 483.xalancbmk in UAR mode
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llvm-svn: 189929
2013-09-04 10:59:32 +00:00
fab9336413
[asan]: fix a CHECK failure in use-after-return mode; enable and fix stack-use-after-return.cc; add a test for UAR mode in asan_noinst_test
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llvm-svn: 189457
2013-08-28 08:59:23 +00:00
d8a1798b47
[asan] Limit fake stack size to a reasonable value when running with unlimited stack.
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llvm-svn: 187411
2013-07-30 11:50:26 +00:00
6a068a715d
[asan] initialize fake_stack lazily and increase its maximal size. This makes -fsanitize=address,use-after-return more robust: all SPEC tests pass now. In the default mode thread stacks become a bit smaller.
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llvm-svn: 184934
2013-06-26 12:16:05 +00:00
cc61eefd4b
Fix MSVC W3 compiler warnings
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llvm-svn: 182857
2013-05-29 14:11:44 +00:00
1c77de3aeb
[asan] improve the UAR reporting (try harder to find the correct frame), try to make the test more stable
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llvm-svn: 179292
2013-04-11 15:35:40 +00:00
5b4267f7e7
[sanitizer] found a bug by code inspection: CHECK(a=b) instead of CHECK(a==b). Was puzzled why lint did not catch it. Turns out this check was disabled for asan source. fix all cases and enable the check
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llvm-svn: 178872
2013-04-05 14:40:25 +00:00
a88c60b085
[ASan] Speed-up initialization-order checking: create and use fast versions of PoisonShadow functions, store copies of __asan_global descriptors in a vector instead of list of pointers. This gives 3x speedup on both benchmarks and real binaries with lots of globals.
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llvm-svn: 178239
2013-03-28 15:42:43 +00:00
54afba8b62
[ASan] Switch ASan to generic ThreadRegistry from sanitizer_common. Delete ASan-specific AsanThreadRegistry.
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llvm-svn: 177634
2013-03-21 11:23:41 +00:00
cf025cb2e6
[ASan] Move GetCurrentThread/SetCurrentThread from AsanThreadRegistry class into plain functions: they don't actually use registry
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llvm-svn: 177501
2013-03-20 09:23:28 +00:00
a0c0da8f51
[ASan] Split ASan interface header into private and public parts. Add a test that makes sure users can include interface header
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llvm-svn: 174058
2013-01-31 13:46:14 +00:00
13bdbe698e
[asan] move FakeStack into a separate file
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llvm-svn: 169734
2012-12-10 14:19:15 +00:00
Vedant Kumar