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Declare callbacks extern weak (if no existing declaration exists), and only call if the function address is non-null. This allows to attach semantic metadata to binaries where no user of that metadata exists, avoiding to have to link empty stub callbacks. Once the binary is linked (statically or dynamically) against a tool runtime that implements the callbacks, the respective callbacks will be called. This vastly simplifies gradual deployment of tools using the metadata, esp. avoiding having to recompile large codebases with different compiler flags (which negatively impacts compiler caches). Reviewed By: dvyukov, vitalybuka Differential Revision: https://reviews.llvm.org/D142408 |
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| cmake | ||
| docs | ||
| include | ||
| lib | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| 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. ================================