delta/compiler-rt.git, branch master

[builtins][test] Avoid unportable mmap call in clear_cache_test.c

2019-10-22T08:44:25+00:00

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


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375490 91177308-0d34-0410-b5e6-96231b3b80d8

Fix lld detection in standalone compiler-rt.

2019-10-21T23:59:45+00:00

Summary:
Right now all hwasan tests on Android are silently disabled because they
require "has_lld" and standalone compiler-rt can not (and AFAIK was
never able to) set it.

Reviewers: pcc, dyung

Subscribers: dberris, mgorny, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D69196

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375472 91177308-0d34-0410-b5e6-96231b3b80d8

[hwasan] Workaround unwinder issues in try-catch test.

2019-10-21T23:57:12+00:00

Android links the unwinder library to every DSO. The problem is,
unwinder has global state, and hwasan implementation of personality
function wrapper happens to rub it the wrong way.

Switch the test to static libc++ as a temporary workaround.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375471 91177308-0d34-0410-b5e6-96231b3b80d8

[profile] Use -fPIC -shared in a test instead of -dynamiclib

2019-10-19T00:51:27+00:00

This is more portable than -dynamiclib. Also, fix the path to an input
file that broke when the test was moved in r375315.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375317 91177308-0d34-0410-b5e6-96231b3b80d8

[profile] Disable instrprof-get-filename-merge-mode.c on Windows

2019-10-19T00:46:53+00:00

The Windows bots are failing with:

clang: warning: argument unused during compilation: '-dynamiclib' [-Wunused-command-line-argument]

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375315 91177308-0d34-0410-b5e6-96231b3b80d8

[profile] Do not cache __llvm_profile_get_filename result

2019-10-18T23:33:40+00:00

When the %m filename pattern is used, the filename is unique to each
image, so the cached value is wrong.

It struck me that the full filename isn't something that's recomputed
often, so perhaps it doesn't need to be cached at all. David Li pointed
out we can go further and just hide lprofCurFilename. This may regress
workflows that depend on using the set-filename API to change filenames
across all loaded DSOs, but this is expected to be very rare.

rdar://55137071

Differential Revision: https://reviews.llvm.org/D69137

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375301 91177308-0d34-0410-b5e6-96231b3b80d8

hwasan: Add missing SANITIZER_INTERFACE_ATTRIBUTE on __hwasan_personality_wrapper.

2019-10-18T22:51:38+00:00

Differential Revision: https://reviews.llvm.org/D69201

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375298 91177308-0d34-0410-b5e6-96231b3b80d8

[hwasan] Remove system allocator fallback.

2019-10-18T22:36:25+00:00

Summary:
This has been an experiment with late malloc interposition, made
possible by a non-standard feature of the Android dynamic loader.

Reviewers: pcc, mmalcomson

Subscribers: srhines, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D69199

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375296 91177308-0d34-0410-b5e6-96231b3b80d8

Update global_symbols.txt.

2019-10-18T20:35:29+00:00

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375284 91177308-0d34-0410-b5e6-96231b3b80d8

scudo: Update TLS_SLOT_SANITIZER value.

2019-10-18T20:00:32+00:00

Android now allocates only 8 fixed TLS slots. Somehow we were getting away
with using a non-existent slot until now, but in some cases the TLS slots
were being placed at the end of a page, which led to a segfault at startup.

Differential Revision: https://reviews.llvm.org/D69191

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375276 91177308-0d34-0410-b5e6-96231b3b80d8