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Dan Liew 8bffb63497 Introduce a way to allow the ASan dylib on Darwin platforms to be loaded via `dlopen()`. 
Summary:

The purpose of this option is provide a way for the ASan dylib
to be loaded via `dlopen()` without triggering most initialization
steps (e.g. shadow memory set up) that normally occur when the
ASan dylib is loaded.

This new functionality is exposed by

- A `SANITIZER_SUPPORTS_INIT_FOR_DLOPEN` macro which indicates if the
  feature is supported. This only true for Darwin currently.
- A `HandleDlopenInit()` function which should return true if the library
  is being loaded via `dlopen()` and
  `SANITIZER_SUPPORTS_INIT_FOR_DLOPEN` is supported. Platforms that
  support this may perform any initialization they wish inside this
  function.

Although disabling initialization is something that could potentially
apply to other sanitizers it appears to be unnecessary for other
sanitizers so this patch only makes the change for ASan.

rdar://problem/45284065

Reviewers: kubamracek, george.karpenkov, kcc, eugenis, krytarowski

Subscribers: #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D54469

llvm-svn: 348078
 		2018-12-01 15:45:42 +00:00
clang Correct indentation. 2018-12-01 09:06:26 +00:00
clang-tools-extra [clangd] Recommit the "AnyScope" changes in requests.json by rCTE347753 (reverted by rCTE347792) 2018-12-01 01:57:15 +00:00
compiler-rt Introduce a way to allow the ASan dylib on Darwin platforms to be loaded via `dlopen()`. 2018-12-01 15:45:42 +00:00
debuginfo-tests Set config.lit_tools_dir, which is needed by lit.llvm.initialize. 2018-11-06 21:54:27 +00:00
libclc travis: Add cmake build 2018-11-27 16:07:21 +00:00
libcxx First part of P0482 - Establish that char8_t is an integral type, and that numeric_limits<char8_t> is valid and sane. (second try) 2018-11-29 23:21:18 +00:00
libcxxabi [libcxx] Remove bad_array_length 2018-11-29 19:44:57 +00:00
libunwind [CMake] Passthrough CFLAGS when checking the compiler-rt path 2018-11-14 00:09:26 +00:00
lld Inline a function template that is used only once. NFC. 2018-11-30 18:19:15 +00:00
lldb [lit] Add a generic build script with a lit substitution. 2018-12-01 00:22:21 +00:00
llgo Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
llvm [TTI] Reduction costs only need to include a single extract element cost (REAPPLIED) 2018-12-01 14:18:31 +00:00
openmp [OPENMP][NVPTX]Make runtime compatible with the original runtime. 2018-11-30 16:52:38 +00:00
parallel-libs Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
polly [CMake] Fix generation of exported targets in build directory 2018-11-06 15:18:17 +00:00
README.md Update the project name in README.md 2018-10-19 00:03:01 +00:00

README.md

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.