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[AIX][test/Index] Set/propagate AIXTHREAD_STK for AIX

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Summary:
Some tests perform deep recursion, which requires a larger pthread stack
size than the relatively low default of 192 KiB for 64-bit processes on
AIX. The `AIXTHREAD_STK` environment variable provides a non-intrusive
way to request a larger pthread stack size for the tests. The required
pthread stack size depends on the build configuration.

A 4 MiB default is generous compared to the 512 KiB of macOS; however,
it is known that some compilers on AIX produce code that uses
comparatively more stack space.

Reviewers: xingxue, daltenty, jasonliu

Reviewed By: daltenty

Subscribers: arphaman, jfb, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65688

llvm-svn: 368690
This commit is contained in:
Hubert Tong 2019-08-13 13:38:15 +00:00
parent b9bd6ebe1d
commit f635e28df8
1 changed files with 12 additions and 0 deletions
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clang/test/Index/lit.local.cfg Normal file
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import platform
# Some tests perform deep recursion, which requires a larger pthread stack size
# than the relatively low default of 192 KiB for 64-bit processes on AIX. The
# `AIXTHREAD_STK` environment variable provides a non-intrusive way to request
# a larger pthread stack size for the tests. Various applications and runtime
# libraries on AIX use a default pthread stack size of 4 MiB, so we will use
# that as a default value here.
if 'AIXTHREAD_STK' in os.environ:
config.environment['AIXTHREAD_STK'] = os.environ['AIXTHREAD_STK']
elif platform.system() == 'AIX':
config.environment['AIXTHREAD_STK'] = '4194304'