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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add support for thread sanitizer (TSAN) via `--with-thread-sanitizer`","articleBody":"# Feature or enhancement\n\nGCC and Clang provide ThreadSanitizer, a tool that detects data races. We should add support for thread sanitizer to CPython. Note that Python already supports the memory and address sanitizers.\n\n* Add `--with-thread-sanitizer` as a configure option\n* Define `_Py_THREAD_SANITIZER` if thread-sanitizer is enabled (see, e.g., `_Py_ADDRESS_SANITIZER` in `pyport.h`)\n* Move the definition of `_Py_NO_SANITIZE_THREAD` from `obmalloc.c` to a place that's more widely available (like `pyport.h`). We're going to need this in a few places\n\nEventually, it would be helpful to have a continuous build for the combination of `--disable-gil --with-thread-sanitizer`. Note that we probably won't want to run all the tests. ThreadSanitizer is slow and also not very useful for single-threaded tests. We should collect a subset of our tests that use threading for the ThreadSanitizer continuous build.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-112648\n* gh-113232\n* gh-116555\n* gh-116558\n* gh-116601\n* gh-116872\n* gh-116896\n* gh-116898\n* gh-116911\n* gh-116924\n* gh-116926\n* gh-116929\n* gh-116953\n* gh-117702\n* gh-117713\n* gh-123833\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/colesbury","@type":"Person","name":"colesbury"},"datePublished":"2023-11-29T20:02:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":13},"url":"https://github.com/112536/cpython/issues/112536"}