llvm-project/clang
serge_sans_paille 4a1a0690ad Support -fstack-clash-protection for x86
Implement protection against the stack clash attack [0] through inline stack
probing.

Probe stack allocation every PAGE_SIZE during frame lowering or dynamic
allocation to make sure the page guard, if any, is touched when touching the
stack, in a similar manner to GCC[1].

This extends the existing `probe-stack' mechanism with a special value `inline-asm'.
Technically the former uses function call before stack allocation while this
patch provides inlined stack probes and chunk allocation.

Only implemented for x86.

[0] https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
[1] https://gcc.gnu.org/ml/gcc-patches/2017-07/msg00556.html

This a recommit of 39f50da2a3 with correct option
flags set.

Differential Revision: https://reviews.llvm.org/D68720
2020-02-07 19:54:39 +01:00
..
INPUTS
bindings [Wdocumentation] Implement \anchor 2019-12-21 14:52:21 +01:00
cmake [CMake][Fuchsia] Disable in-process cc1 2020-01-22 10:11:54 -08:00
docs Support -fstack-clash-protection for x86 2020-02-07 19:54:39 +01:00
examples Update clang-interpreter example to incorporate changes in ce2207abaf. 2020-01-21 22:00:50 -08:00
include Support -fstack-clash-protection for x86 2020-02-07 19:54:39 +01:00
lib Support -fstack-clash-protection for x86 2020-02-07 19:54:39 +01:00
runtime
test Support -fstack-clash-protection for x86 2020-02-07 19:54:39 +01:00
tools [OPENMP50]Add parsing/sema for acq_rel clause. 2020-02-07 09:21:10 -05:00
unittests [clang-format] Do not merge short C# class definitions into one line 2020-02-05 17:38:33 +00:00
utils [CMake] Rename EXCLUDE_FROM_ALL and make it an argument to add_lit_testsuite 2020-02-06 15:33:18 -08:00
www C++ DR2026: static storage duration variables are not zeroed before 2020-02-06 16:37:22 -08:00
.arcconfig
.clang-format
.clang-tidy - Update .clang-tidy to ignore parameters of main like functions for naming violations in clang and llvm directory 2020-01-31 16:49:45 +00:00
.gitignore
CMakeLists.txt [Clang][Driver] Re-use the calling process instead of creating a new process for the cc1 invocation 2020-01-13 10:40:18 -05:00
CODE_OWNERS.TXT
INSTALL.txt
LICENSE.TXT
ModuleInfo.txt
NOTES.txt
README.txt [NFC] test commit reverted 2019-12-21 22:12:07 +04:00

README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:             http://clang.llvm.org/
Building and using Clang:         http://clang.llvm.org/get_started.html
Clang Static Analyzer:            http://clang-analyzer.llvm.org/
Information on the LLVM project:  http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.llvm.org/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/