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Andrew Browne 55bbe5301b [DFSan] Change shadow and origin memory layouts to match MSan. 
Previously on x86_64:

  +--------------------+ 0x800000000000 (top of memory)
  | application memory |
  +--------------------+ 0x700000008000 (kAppAddr)
  |                    |
  |       unused       |
  |                    |
  +--------------------+ 0x300000000000 (kUnusedAddr)
  |       origin       |
  +--------------------+ 0x200000008000 (kOriginAddr)
  |       unused       |
  +--------------------+ 0x200000000000
  |   shadow memory    |
  +--------------------+ 0x100000008000 (kShadowAddr)
  |       unused       |
  +--------------------+ 0x000000010000
  | reserved by kernel |
  +--------------------+ 0x000000000000

  MEM_TO_SHADOW(mem) = mem & ~0x600000000000
  SHADOW_TO_ORIGIN(shadow) = kOriginAddr - kShadowAddr + shadow

Now for x86_64:

  +--------------------+ 0x800000000000 (top of memory)
  |    application 3   |
  +--------------------+ 0x700000000000
  |      invalid       |
  +--------------------+ 0x610000000000
  |      origin 1      |
  +--------------------+ 0x600000000000
  |    application 2   |
  +--------------------+ 0x510000000000
  |      shadow 1      |
  +--------------------+ 0x500000000000
  |      invalid       |
  +--------------------+ 0x400000000000
  |      origin 3      |
  +--------------------+ 0x300000000000
  |      shadow 3      |
  +--------------------+ 0x200000000000
  |      origin 2      |
  +--------------------+ 0x110000000000
  |      invalid       |
  +--------------------+ 0x100000000000
  |      shadow 2      |
  +--------------------+ 0x010000000000
  |    application 1   |
  +--------------------+ 0x000000000000

  MEM_TO_SHADOW(mem) = mem ^ 0x500000000000
  SHADOW_TO_ORIGIN(shadow) = shadow + 0x100000000000

Reviewed By: stephan.yichao.zhao, gbalats

Differential Revision: https://reviews.llvm.org/D104896
2021-06-25 17:00:38 -07:00
benchmarks
bindings [SanitizeCoverage] Add support for NoSanitizeCoverage function attribute 2021-05-25 12:57:14 +02:00
cmake [CMake] Don't LTO optimize targets on Darwin either 2021-06-24 10:02:03 -07:00
docs [AMDGPU] Reserve AMDGPU ELF e_flags machine 0x43 2021-06-24 22:51:47 +00:00
examples [ORC][examples] Add missing library dependence 2021-06-19 14:48:34 +10:00
include [OpenMP] Change OpenMPOpt to check openmp metadata 2021-06-25 16:34:22 -04:00
lib [DFSan] Change shadow and origin memory layouts to match MSan. 2021-06-25 17:00:38 -07:00
projects llvmbuildectomy - replace llvm-build by plain cmake 2020-11-13 10:35:24 +01:00
resources
runtimes [runtimes] Fix umbrella component targets 2021-06-12 19:49:44 -07:00
test [DFSan] Change shadow and origin memory layouts to match MSan. 2021-06-25 17:00:38 -07:00
tools [llvm-rc] Don't rewrite the arch in the default triple unless necessary 2021-06-25 22:59:09 +03:00
unittests Revert "[GlobalISel] NFC: Have LLT::getSizeInBits/Bytes return a TypeSize." 2021-06-25 17:37:16 +01:00
utils [UpdateCCTestChecks] Support --check-globals 2021-06-25 13:17:56 -04:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy NFC: .clang-tidy: Inherit configs from parents to improve maintainability 2021-06-08 08:25:59 -07:00
.gitattributes Fix the "git modified" issue on the preserve-comments-crlf.s. 2019-09-10 12:17:49 +00:00
.gitignore Remove .gitignore entries not relevant in the monorepo. 2021-04-07 12:25:02 -07:00
CMakeLists.txt [CMake] Don't LTO optimize targets that aren't part of any distribution 2021-05-19 15:02:11 -07:00
CODE_OWNERS.TXT [M68k][CODE_OWNERS](0/8) Add code owner for the M68k target 2021-03-08 12:30:56 -08:00
configure
CREDITS.TXT Update personal info in CREDITS.TXT 2021-04-11 19:25:02 +08:00
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
llvm.spec.in Update structured references to the license to the new license. 2019-01-19 11:30:51 +00:00
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +00:00

README.txt 

The LLVM Compiler Infrastructure
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.