forked from OSchip/llvm-project
9ef6faf496
Summary: fork() wasn't well (or at all) supported in Scudo. This materialized in deadlocks in children. In order to properly support fork, we will lock the allocator pre-fork and unlock it post-fork in parent and child. This is done via a `pthread_atfork` call installing the necessary handlers. A couple of things suck here: this function allocates - so this has to be done post initialization as our init path is not reentrance, and it doesn't allow for an extra pointer - so we can't pass the allocator we are currently working with. In order to work around this, I added a post-init template parameter that gets executed once the allocator is initialized for the current thread. Its job for the C wrappers is to install the atfork handlers. I reorganized a bit the impacted area and added some tests, courtesy of cferris@ that were deadlocking prior to this fix. Subscribers: jfb, #sanitizers, llvm-commits Tags: #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D72470 |
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| cmake | ||
| docs | ||
| include | ||
| lib | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .arcconfig | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| README.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. ================================