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Rainer Orth 1876e6c83c [builtins][test] Avoid unportable mmap call in clear_cache_test.c 
Within the last two weeks, the Builtins-*-sunos :: clear_cache_test.c started to FAIL
on Solaris.  Running it under truss shows

  mmap(0x00000000, 128, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 0, 0) Err#22 EINVAL
  _exit(1)

While there are several possible reasons mmap can return EINVAL on Solaris, it turns
out it's this one (from mmap(2)):

  MAP_ANON  was  specified,  but the file descriptor was not
   -1.

And indeed even the Linux mmap(2) documents this as unportable:

  MAP_ANONYMOUS
          The mapping is not backed by any file; its contents are initial‐
          ized to zero.  The fd argument is ignored; however, some  imple‐
          mentations require fd to be -1 if MAP_ANONYMOUS (or MAP_ANON) is
          specified, and portable applications should  ensure  this.   The

This patch follows this advise.  Tested on x86_64-pc-linux-gnu, amd64-pc-solaris2.11
and sparcv9-sun-solaris2.11.

Differential Revision: https://reviews.llvm.org/D68455

llvm-svn: 375490
 		2019-10-22 08:44:25 +00:00
..
cmake Fix lld detection in standalone compiler-rt. 2019-10-21 23:59:45 +00:00
docs
…
include [compiler-rt] Add ubsan interface header. 2019-09-13 08:22:58 +00:00
lib [profile] Do not cache __llvm_profile_get_filename result 2019-10-18 23:33:40 +00:00
test [builtins][test] Avoid unportable mmap call in clear_cache_test.c 2019-10-22 08:44:25 +00:00
tools Add GWP-ASan fuzz target to compiler-rt/tools. 2019-08-27 18:28:07 +00:00
unittests [compiler-rt] Rename lit.*.cfg.* -> lit.*.cfg.py.* 2019-06-27 20:56:04 +00:00
utils Update generate_netbsd_ioctls.awk for NetBSD 9.99.3 2019-08-08 02:08:23 +00:00
www Adjust documentation for git migration. 2019-01-29 16:37:27 +00:00
.arcconfig [compiler-rt] Set up .arcconfig to point to new Diffusion CRT repository 2017-12-06 20:55:32 +00:00
.gitignore Add .pyc files to .gitignore to compiler-rt 2017-07-24 21:51:12 +00:00
CMakeLists.txt Fix lld detection in standalone compiler-rt. 2019-10-21 23:59:45 +00:00
CODE_OWNERS.TXT
…
CREDITS.TXT
…
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
README.txt
…

README.txt 

Compiler-RT
================================

This directory and its subdirectories contain source code for the compiler
support routines.

Compiler-RT is open source software. You may freely distribute it under the
terms of the license agreement found in LICENSE.txt.

================================