Author: markj Date: Fri Oct 17 19:04:24 2014 New Revision: 273236 URL: https://svnweb.freebsd.org/changeset/base/273236
Log: Use pmc_destroy_pmc_descriptor() to actually free the pmc, which is consistent with pmc_destroy_owner_descriptor(). Also be sure to destroy PMCs if a process exits or execs without explicitly releasing them. Reviewed by: bz, gnn MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D958 Modified: head/sys/dev/hwpmc/hwpmc_mod.c Modified: head/sys/dev/hwpmc/hwpmc_mod.c ============================================================================== --- head/sys/dev/hwpmc/hwpmc_mod.c Fri Oct 17 18:16:40 2014 (r273235) +++ head/sys/dev/hwpmc/hwpmc_mod.c Fri Oct 17 19:04:24 2014 (r273236) @@ -192,6 +192,7 @@ static int pmc_detach_process(struct pro static int pmc_detach_one_process(struct proc *p, struct pmc *pm, int flags); static void pmc_destroy_owner_descriptor(struct pmc_owner *po); +static void pmc_destroy_pmc_descriptor(struct pmc *pm); static struct pmc_owner *pmc_find_owner_descriptor(struct proc *p); static int pmc_find_pmc(pmc_id_t pmcid, struct pmc **pm); static struct pmc *pmc_find_pmc_descriptor_in_process(struct pmc_owner *po, @@ -748,6 +749,7 @@ pmc_remove_owner(struct pmc_owner *po) ("[pmc,%d] owner %p != po %p", __LINE__, pm->pm_owner, po)); pmc_release_pmc_descriptor(pm); /* will unlink from the list */ + pmc_destroy_pmc_descriptor(pm); } KASSERT(po->po_sscount == 0, @@ -2160,9 +2162,7 @@ pmc_allocate_pmc_descriptor(void) static void pmc_destroy_pmc_descriptor(struct pmc *pm) { - (void) pm; -#ifdef DEBUG KASSERT(pm->pm_state == PMC_STATE_DELETED || pm->pm_state == PMC_STATE_FREE, ("[pmc,%d] destroying non-deleted PMC", __LINE__)); @@ -2173,7 +2173,8 @@ pmc_destroy_pmc_descriptor(struct pmc *p KASSERT(pm->pm_runcount == 0, ("[pmc,%d] pmc has non-zero run count %d", __LINE__, pm->pm_runcount)); -#endif + + free(pm, M_PMC); } static void @@ -2206,10 +2207,10 @@ pmc_wait_for_pmc_idle(struct pmc *pm) * - detaches the PMC from hardware * - unlinks all target threads that were attached to it * - removes the PMC from its owner's list - * - destroy's the PMC private mutex + * - destroys the PMC private mutex * - * Once this function completes, the given pmc pointer can be safely - * FREE'd by the caller. + * Once this function completes, the given pmc pointer can be freed by + * calling pmc_destroy_pmc_descriptor(). */ static void @@ -2359,8 +2360,6 @@ pmc_release_pmc_descriptor(struct pmc *p LIST_REMOVE(pm, pm_next); pm->pm_owner = NULL; } - - pmc_destroy_pmc_descriptor(pm); } /* @@ -3367,7 +3366,6 @@ pmc_syscall_handler(struct thread *td, v if (n == (int) md->pmd_npmc) { pmc_destroy_pmc_descriptor(pmc); - free(pmc, M_PMC); pmc = NULL; error = EINVAL; break; @@ -3403,7 +3401,6 @@ pmc_syscall_handler(struct thread *td, v (error = pcd->pcd_config_pmc(cpu, adjri, pmc)) != 0) { (void) pcd->pcd_release_pmc(cpu, adjri, pmc); pmc_destroy_pmc_descriptor(pmc); - free(pmc, M_PMC); pmc = NULL; pmc_restore_cpu_binding(&pb); error = EPERM; @@ -3431,7 +3428,7 @@ pmc_syscall_handler(struct thread *td, v if ((error = pmc_register_owner(curthread->td_proc, pmc)) != 0) { pmc_release_pmc_descriptor(pmc); - free(pmc, M_PMC); + pmc_destroy_pmc_descriptor(pmc); pmc = NULL; break; } @@ -3674,8 +3671,7 @@ pmc_syscall_handler(struct thread *td, v po = pm->pm_owner; pmc_release_pmc_descriptor(pm); pmc_maybe_remove_owner(po); - - free(pm, M_PMC); + pmc_destroy_pmc_descriptor(pm); } break; _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
