tsan: use a single background thread for memory profiler and memory flush (and later for symbolizer flush)

llvm-svn: 177627

comparing type_info names, since the latter have better uniqueness guarantees
in practice.

llvm-svn: 177618

 * libclang_rt-san-* is sanitizer_common, and is linked in only if no other
   sanitizer runtime is present.
 * libclang_rt-ubsan-* is the piece of the runtime which doesn't depend on
   a C++ ABI library, and is always linked in.
 * libclang_rt-ubsan_cxx-* is the piece of the runtime which depends on a
   C++ ABI library, and is only linked in when linking a C++ binary.

The Darwin ubsan runtime is unchanged.

For more details, see Clang change r177605.

llvm-svn: 177606

This function replaces the call of `atexit' from being generated in the compile
units. Basically, it registers the "writeout" and "flush" functions (if
present). It will generate calls to the `atexit' function for cleanups and final
writeout functions, but only once. This is better than checking for `main',
because a library may not have a `main' function in it.
<rdar://problem/12439551>

llvm-svn: 177578

llvm-svn: 177526

llvm-svn: 177523

llvm-svn: 177522

overflow is handled anyway
saves memory because each thread holds 1024 mutexsets

llvm-svn: 177520

llvm-svn: 177519

tsan: special handling of .rodata (don't try to find races, don't keep shadow, dont' put into traces)

llvm-svn: 177517

llvm-svn: 177513

eliminat thread "dead info" altogether

llvm-svn: 177512

llvm-svn: 177510

llvm-svn: 177508

256 blocks (which is 512 in reallity) seems to be too big cache,
reducing the size reduces memory consumption but does not degrade performance.

llvm-svn: 177502

[ASan] Move GetCurrentThread/SetCurrentThread from AsanThreadRegistry class into plain functions: they don't actually use registry

llvm-svn: 177501

llvm-svn: 177500

llvm-svn: 177499

llvm-svn: 177497

It may be prohibitively expensive to write out >1000 files at the same time. So
we would rather emit them serially. These functions allow the GCOV
implementation to register the functions that writeout the GCOV information per
compile unit. At exit, they are written.
<rdar://problem/12439551>

llvm-svn: 177436

llvm-svn: 177407

llvm-svn: 177401

llvm-svn: 177400

llvm-svn: 177397

llvm-svn: 177396

llvm-svn: 177395

tsan: flush dead thread info earlier (when another thread is finished rather than new thread is created)

llvm-svn: 177394

llvm-svn: 177393

llvm-svn: 177389

llvm-svn: 177388

llvm-svn: 177387

llvm-svn: 177384

Moved this code to sanitizer_common.

llvm-svn: 177383

llvm-svn: 177382

helps to reduce memory consumption if an atomic is used only with relaxed ops (stats)

llvm-svn: 177381

llvm-svn: 177363

The __llvm_gcov_flush() functions only work for the local compile unit. However,
when __gcov_flush() is called, the user expects all of the counters to be
flushed, not just the ones in the current compile unit.

This adds some library functions that register the flush functions. It also
defined __gcov_flush() so that loops through that list and calls the functions.

PR15191 & <rdar://problem/13167507>

llvm-svn: 177337

llvm-svn: 177312

llvm-svn: 177292

greatly reduces memory consumption

llvm-svn: 177289