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哈希：3c3f886e4bc7619f7847ad0d0f996088ddf5915a 作者：Alexander Leidinger <netchild@FreeBSD.org> 提交者：Alexander Leidinger <netchild@FreeBSD.org> 提交时间：2026-07-20 18:24:55 +0800 提交信息： hwpmc: add regression tests for detaching a live process-mode PMC Attach a process-mode counting PMC to the current process, start it, then detach and release it while it is still loaded on the hardware - the case that previously leaked the PMC's runcount reference and wedged pmc_wait_for_pmc_idle() at release. A second case does the same from a multi-threaded process so the sibling threads' references have to be drained too. The tests need an allocatable process-mode counting event and skip where none is available (hwpmc(4) not loaded, or a VM without a vPMU). Reviewed by: adrian MFC after: 2 weeks Assisted-by: Claude Code (Fable 5) Differential Revision: https://reviews.freebsd.org/D58343