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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-05-29 22:31:28 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-05-29 22:31:28 +0000 |
| commit | 3a91a308cdb78df8e50fdec2d64dfdb1e1f6bb8f (patch) | |
| tree | 9824d644e15c8847b21d83a166e78dd23d788d5b /cmake | |
| parent | c401872a6a445a7cacbb352a1c70e8d04dcdeb43 (diff) | |
Add descriptive names to sanitizer entries in /proc/self/maps. Helps debugging.
This is done by creating a named shared memory region, unlinking it
and setting up a private (i.e. copy-on-write) mapping of that instead
of a regular anonymous mapping. I've experimented with regular
(sparse) files, but they can not be scaled to the size of MSan shadow
mapping, at least on Linux/X86_64 and ext3 fs.
Controlled by a common flag, decorate_proc_maps, disabled by default.
This patch has a few shortcomings:
* not all mappings are annotated, especially in TSan.
* our handling of memset() of shadow via mmap() puts small anonymous
mappings inside larger named mappings, which looks ugly and can, in
theory, hit the mapping number limit.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@238621 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/config-ix.cmake | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake index d69d73d41..114c2a5b6 100644 --- a/cmake/config-ix.cmake +++ b/cmake/config-ix.cmake @@ -62,6 +62,7 @@ check_symbol_exists(__func__ "" COMPILER_RT_HAS_FUNC_SYMBOL) # Libraries. check_library_exists(c printf "" COMPILER_RT_HAS_LIBC) check_library_exists(dl dlopen "" COMPILER_RT_HAS_LIBDL) +check_library_exists(rt shm_open "" COMPILER_RT_HAS_LIBRT) check_library_exists(m pow "" COMPILER_RT_HAS_LIBM) check_library_exists(pthread pthread_create "" COMPILER_RT_HAS_LIBPTHREAD) check_library_exists(stdc++ __cxa_throw "" COMPILER_RT_HAS_LIBSTDCXX) |