llvm-svn: 200312

This change is a part of refactoring intended to have common signal handling behavior in all tools.
Note that this particular change doesn't enable use_sigaltstack support in every tool.

llvm-svn: 200310

They seems to be unused, but cause maintenance pain.

llvm-svn: 200308

allow SIGABRT to spoil errno, because some real programs
reset SIGABRT handler in the handler, re-raise SIGABRT and return from the handler

llvm-svn: 200304

This change is a part of refactoring intended to have common signal handling behavior in all tools.

llvm-svn: 200295

llvm-svn: 200293

llvm-svn: 200245

[sanitizer] revert r200197: the buggy kernel (https://bugzilla.kernel.org/show_bug.cgi?id=67651) is almost unusable with asan even with this workaround (too slow), so this workaround makes no sense. The asan/msan bootstrap bot was changed to use a non-buggy kernel

llvm-svn: 200217

llvm-svn: 200200

llvm-svn: 200199

[sanitizer] increase the mmap granularity in sanitizer allocator from 2^16 to 2^18. This is a partial workaround for the fresh Kernel bug https://bugzilla.kernel.org/show_bug.cgi?id=67651

llvm-svn: 200197

llvm-svn: 200044

It was redundant (since ARM mode is the default) and misleading since
(e.g.) Cortex-A15 would not satisfy the #ifdef but would be in ARM
mode regardless.

llvm-svn: 200043

llvm-svn: 200039

remains ARM mode only, supporting thumb requires explicit it prefixes
for the predicted adds/subs and adjusting the offset computation for the
different block sizes.

llvm-svn: 200035

otherwise races are suppressed due to "same stack"

llvm-svn: 200015

llvm-svn: 200012

llvm-svn: 200009

llvm-svn: 200007

llvm-svn: 200006

llvm-svn: 200005

We left ignore_interceptors>0 when calling signal handlers
from blocking interceptors, this leads to missing synchronization in such signal handler.

llvm-svn: 200003

llvm-svn: 200002

test-and-subtract loop and compute the initial block as address,
shaving off between 5% and 10% on Cortex A9 and 30%+ a Raspberry Pi.
Code written by Matt Thomas and Joerg Sonnenberger.

Differential Revision: http://llvm-reviews.chandlerc.com/D2595

llvm-svn: 200001

llvm-svn: 199998

llvm-svn: 199996

Currently correct programs can deadlock after fork, because atomic operations and async-signal-safe calls are not async-signal-safe under tsan.
With this change:
- if a single-threaded program forks, the child continues running with verification enabled (the tsan background thread is recreated as well)
- if a multi-threaded program forks, then the child runs with verification disabled (memory accesses, atomic operations and interceptors are disabled); it's expected that it will exec soon anyway
- if the child tries to create more threads after multi-threaded fork, the program aborts with error message
- die_after_fork flag is added that allows to continue running, but all bets are off

http://llvm-reviews.chandlerc.com/D2614

llvm-svn: 199993

[msan] add __libc_memalign interceptor; add a regression test for the existing bug with dtls support in msan

llvm-svn: 199980

llvm-svn: 199979

the function size.

llvm-svn: 199914

llvm-svn: 199900

[Sanitizer] Fix false positive in snprintf interceptor - take the number of actually written symbols from real snprintf call.

llvm-svn: 199899

llvm-svn: 199895

llvm-svn: 199888

This change duplicates all ASan output to system log on Android.

llvm-svn: 199887

llvm-svn: 199883

llvm-svn: 199880

llvm-svn: 199879

llvm-svn: 199878

llvm-svn: 199877