Date: Tue, 8 Dec 2009 19:18:32 +0000 (UTC) From: Fabien Thomas <fabient@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r200271 - stable/7/sys/kern Message-ID: <200912081918.nB8JIWv9097453@svn.freebsd.org>
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Author: fabient Date: Tue Dec 8 19:18:32 2009 New Revision: 200271 URL: http://svn.freebsd.org/changeset/base/200271 Log: MFC 198464: Inform hwpmc(4) of a thread's impending demise prior to invoking sched_throw(). Modified: stable/7/sys/kern/kern_thread.c Directory Properties: stable/7/sys/ (props changed) stable/7/sys/contrib/pf/ (props changed) Modified: stable/7/sys/kern/kern_thread.c ============================================================================== --- stable/7/sys/kern/kern_thread.c Tue Dec 8 19:12:38 2009 (r200270) +++ stable/7/sys/kern/kern_thread.c Tue Dec 8 19:18:32 2009 (r200271) @@ -26,6 +26,8 @@ * DAMAGE. */ +#include "opt_hwpmc_hooks.h" + #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); @@ -44,6 +46,9 @@ __FBSDID("$FreeBSD$"); #include <sys/ktr.h> #include <sys/umtx.h> #include <sys/cpuset.h> +#ifdef HWPMC_HOOKS +#include <sys/pmckern.h> +#endif #include <security/audit/audit.h> @@ -497,6 +502,14 @@ thread_exit(void) panic ("thread_exit: Last thread exiting on its own"); } } +#ifdef HWPMC_HOOKS + /* + * If this thread is part of a process that is being tracked by hwpmc(4), + * inform the module of the thread's impending exit. + */ + if (PMC_PROC_IS_USING_PMCS(td->td_proc)) + PMC_SWITCH_CONTEXT(td, PMC_FN_CSW_OUT); +#endif PROC_UNLOCK(p); thread_lock(td); /* Save our tick information with both the thread and proc locked */
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