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Dean Michael Berris 0d86810158 [XRay][x86_64] Define a tail exit trampoline. 
Summary:
We define a new trampoline that's a hybrid between the exit and entry
trampolines with the following properties:

- Saves all of the callee-saved registers according to the x86_64
  calling conventions.
- Indicate to the log handler function being called that this is a
  function exit event.

This fixes a bug that is a result of not saving enough of the register
states, and that the log handler is clobbering registers that would be
used by the function being tail-exited into manifesting as runtime
errors.

Reviewers: rSerge, echristo, majnemer

Subscribers: mehdi_amini, llvm-commits

Differential Revision: https://reviews.llvm.org/D26020

llvm-svn: 285787
 		2016-11-02 04:11:29 +00:00
..
cmake Remove a VS 2012 workaround, we require 2015 now. 2016-10-25 18:48:43 +00:00
docs [sanitizers] Make it possible to XFAIL on the effective target, not just the default. 2016-08-09 11:50:53 +00:00
include [compiler-rt][XRay] Support tail call sleds 2016-10-13 23:56:54 +00:00
lib [XRay][x86_64] Define a tail exit trampoline. 2016-11-02 04:11:29 +00:00
test [tsan] Enable the tsan/libcxx/ testcase(s) on Darwin 2016-10-31 20:50:15 +00:00
unittests Replace hardcoded comment at 'lit.site.cfg.in' 2016-04-16 07:03:45 +00:00
www Update references to new lists.llvm.org mailing lists. 2015-08-05 03:58:00 +00:00
.arcconfig Upgrade all the .arcconfigs to https. 2016-07-14 13:15:37 +00:00
.gitignore
…
CMakeLists.txt [compiler-rt] Exclude compiler-rt from using -fmodules when LLVM_ENABLE_MODULES=On 2016-10-08 09:01:27 +00:00
CODE_OWNERS.TXT [sanitizers] remove earthdok@ from owners 2016-05-18 18:52:18 +00:00
CREDITS.TXT Add Guan-Hong Liu. 2014-06-16 08:38:19 +00:00
LICENSE.TXT Update copyright year to 2016. 2016-03-30 22:38:50 +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.

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