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llvm-project/compiler-rt
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Evgeniy Stepanov 7395cae005 [msan] Change the way origin ids are built. 
Previously, all origin ids were "chained" origins, i.e values of
ChainedOriginDepot. This added a level of indirection for simple
stack and heap allocation, which were represented as chains of
length 1. This costs both RAM and CPU, but provides a joined 2**29
origin id space. It also made function (any instrumented function)
entry non-async-signal-safe, but that does not really matter because
memory stores in track-origins=2 mode are not async-signal-safe anyway.

With this change, the type of the origin is encoded in origin id.
See comment in msan_origin.h for more details. This reduces chained and stack
origin id range to 2**28 each, but leaves extra 2**31 for heap origins.

This change should not have any user-visible effects.

llvm-svn: 223233
 		2014-12-03 13:58:40 +00:00
..
SDKs Build Darwin libclang_rt libraries against real SDKs. 2014-11-10 19:38:15 +00:00
cmake [MSan] [MIPS] Adding support for MIPS64 (patch by Mohit Bhakkad). 2014-11-19 21:42:33 +00:00
include [DFSan] Add flag to dump the labels when the program terminates. 2014-11-20 10:01:08 +00:00
lib [msan] Change the way origin ids are built. 2014-12-03 13:58:40 +00:00
make [asan] Remove the local copy of Android ucontext.h. 2014-11-28 10:37:44 +00:00
test [asan] Fix stale_stack_leak.cc test in ASan-UAR mode. 2014-12-03 13:35:41 +00:00
unittests [ASan] Optional support for dynamic ASan runtime on Linux. 2014-04-01 13:16:30 +00:00
www Rewrite compiler-rt.llvm.org to make it relevant 2014-02-27 14:39:48 +00:00
.arcconfig Update arc config to new domain. 2014-04-07 10:22:41 +00:00
.gitignore Add vim swap files to .gitignore 2014-03-20 19:44:33 +00:00
CMakeLists.txt [asan] Remove the local copy of Android ucontext.h. 2014-11-28 10:37:44 +00:00
CODE_OWNERS.TXT Add myself as a c-rt owner of ASan/Win 2014-02-27 12:07:43 +00:00
CREDITS.TXT Add Guan-Hong Liu. 2014-06-16 08:38:19 +00:00
LICENSE.TXT Move Android ucontext.h out of third_party. 2014-03-18 08:32:14 +00:00
Makefile Revert r196490 and fix include paths in makefile-based build 2013-12-05 10:40:11 +00:00
README.txt Moved the builtins documentation to lib/builtins/ 2014-05-28 23:09:45 +00:00

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.

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