[pull] master from ruby:master#1175
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These are all simple getters which don't allocate or raise exceptions. We can declare them as a leaf and skip pushing frames inside YJIT/ZJIT.
Set RUBY_TEST_GC_VERIFY to call GC.verify_internal_consistency after each test. An integer >= 2 samples once every N tests; any other non-empty value verifies every test. Useful for pinning down which test corrupts the heap. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
ThreadSanitizer cannot follow Ruby's userspace coroutine stack switches, so its per-thread shadow stack leaks across a switch and eventually faults inside libtsan. Create a TSan fiber per coroutine and switch to it at each transfer, mirroring the existing AddressSanitizer annotations. The main context borrows the OS thread's implicit fiber and must not destroy it. Only amd64 is annotated here. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Jeremy Evans <code@jeremyevans.net>
Co-authored-by: Jeremy Evans <code@jeremyevans.net>
Co-authored-by: Jeremy Evans <code@jeremyevans.net>
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