From owner-svn-src-all@freebsd.org Tue May 3 20:08:06 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B7A61B2C738; Tue, 3 May 2016 20:08:06 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 755401313; Tue, 3 May 2016 20:08:06 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u43K85KH067827; Tue, 3 May 2016 20:08:05 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u43K85Fp067823; Tue, 3 May 2016 20:08:05 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201605032008.u43K85Fp067823@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Tue, 3 May 2016 20:08:05 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r299003 - in stable/10/sys/cddl/contrib/opensolaris/uts: common/dtrace common/sys intel/dtrace powerpc/dtrace X-SVN-Group: stable-10 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 May 2016 20:08:06 -0000 Author: markj Date: Tue May 3 20:08:05 2016 New Revision: 299003 URL: https://svnweb.freebsd.org/changeset/base/299003 Log: MFC r296479: Fix fasttrap tracepoint locking. Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c stable/10/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h stable/10/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c stable/10/sys/cddl/contrib/opensolaris/uts/powerpc/dtrace/fasttrap_isa.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Tue May 3 19:45:24 2016 (r299002) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Tue May 3 20:08:05 2016 (r299003) @@ -63,14 +63,16 @@ #ifndef illumos #include #include +#include #include #include #include + #include #include #include #include -#include + #include #endif @@ -225,7 +227,7 @@ static void fasttrap_thread_dtor(void *, #define FASTTRAP_PROCS_INDEX(pid) ((pid) & fasttrap_procs.fth_mask) #ifndef illumos -static kmutex_t fasttrap_cpuc_pid_lock[MAXCPU]; +struct rmlock fasttrap_tp_lock; static eventhandler_tag fasttrap_thread_dtor_tag; #endif @@ -440,10 +442,15 @@ fasttrap_mod_barrier(uint64_t gen) fasttrap_mod_gen++; +#ifdef illumos CPU_FOREACH(i) { mutex_enter(&fasttrap_cpuc_pid_lock[i]); mutex_exit(&fasttrap_cpuc_pid_lock[i]); } +#else + rm_wlock(&fasttrap_tp_lock); + rm_wunlock(&fasttrap_tp_lock); +#endif } /* @@ -2565,10 +2572,7 @@ fasttrap_load(void) mutex_init(&fasttrap_procs.fth_table[i].ftb_mtx, "processes bucket mtx", MUTEX_DEFAULT, NULL); - CPU_FOREACH(i) { - mutex_init(&fasttrap_cpuc_pid_lock[i], "fasttrap barrier", - MUTEX_DEFAULT, NULL); - } + rm_init(&fasttrap_tp_lock, "fasttrap tracepoint"); /* * This event handler must run before kdtrace_thread_dtor() since it @@ -2701,9 +2705,7 @@ fasttrap_unload(void) #ifndef illumos destroy_dev(fasttrap_cdev); mutex_destroy(&fasttrap_count_mtx); - CPU_FOREACH(i) { - mutex_destroy(&fasttrap_cpuc_pid_lock[i]); - } + rm_destroy(&fasttrap_tp_lock); #endif return (0); Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h Tue May 3 19:45:24 2016 (r299002) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h Tue May 3 20:08:05 2016 (r299003) @@ -206,6 +206,10 @@ extern fasttrap_scrspace_t *fasttrap_scr extern dtrace_id_t fasttrap_probe_id; extern fasttrap_hash_t fasttrap_tpoints; +#ifndef illumos +extern struct rmlock fasttrap_tp_lock; +#endif + #define FASTTRAP_TPOINTS_INDEX(pid, pc) \ (((pc) / sizeof (fasttrap_instr_t) + (pid)) & fasttrap_tpoints.fth_mask) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c Tue May 3 19:45:24 2016 (r299002) +++ stable/10/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c Tue May 3 20:08:05 2016 (r299003) @@ -46,6 +46,7 @@ #include #include #include +#include #include #include #include @@ -749,11 +750,13 @@ fasttrap_return_common(struct reg *rp, u fasttrap_id_t *id; #ifdef illumos kmutex_t *pid_mtx; -#endif -#ifdef illumos pid_mtx = &cpu_core[CPU->cpu_id].cpuc_pid_lock; mutex_enter(pid_mtx); +#else + struct rm_priotracker tracker; + + rm_rlock(&fasttrap_tp_lock, &tracker); #endif bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)]; @@ -771,6 +774,8 @@ fasttrap_return_common(struct reg *rp, u if (tp == NULL) { #ifdef illumos mutex_exit(pid_mtx); +#else + rm_runlock(&fasttrap_tp_lock, &tracker); #endif return; } @@ -794,6 +799,8 @@ fasttrap_return_common(struct reg *rp, u #ifdef illumos mutex_exit(pid_mtx); +#else + rm_runlock(&fasttrap_tp_lock, &tracker); #endif } @@ -1002,6 +1009,7 @@ fasttrap_pid_probe(struct reg *rp) { proc_t *p = curproc; #ifndef illumos + struct rm_priotracker tracker; proc_t *pp; #endif uintptr_t pc = rp->r_rip - 1; @@ -1061,8 +1069,7 @@ fasttrap_pid_probe(struct reg *rp) sx_sunlock(&proctree_lock); pp = NULL; - PROC_LOCK(p); - _PHOLD(p); + rm_rlock(&fasttrap_tp_lock, &tracker); #endif bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)]; @@ -1085,8 +1092,7 @@ fasttrap_pid_probe(struct reg *rp) #ifdef illumos mutex_exit(pid_mtx); #else - _PRELE(p); - PROC_UNLOCK(p); + rm_runlock(&fasttrap_tp_lock, &tracker); #endif return (-1); } @@ -1212,7 +1218,7 @@ fasttrap_pid_probe(struct reg *rp) #ifdef illumos mutex_exit(pid_mtx); #else - PROC_UNLOCK(p); + rm_runlock(&fasttrap_tp_lock, &tracker); #endif tp = &tp_local; @@ -1825,7 +1831,6 @@ done: #ifndef illumos PROC_LOCK(p); proc_write_regs(curthread, rp); - _PRELE(p); PROC_UNLOCK(p); #endif Modified: stable/10/sys/cddl/contrib/opensolaris/uts/powerpc/dtrace/fasttrap_isa.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/powerpc/dtrace/fasttrap_isa.c Tue May 3 19:45:24 2016 (r299002) +++ stable/10/sys/cddl/contrib/opensolaris/uts/powerpc/dtrace/fasttrap_isa.c Tue May 3 20:08:05 2016 (r299003) @@ -33,6 +33,7 @@ #include #include #include +#include #include #define OP(x) ((x) >> 26) @@ -302,10 +303,12 @@ static void fasttrap_return_common(struct reg *rp, uintptr_t pc, pid_t pid, uintptr_t new_pc) { + struct rm_priotracker tracker; fasttrap_tracepoint_t *tp; fasttrap_bucket_t *bucket; fasttrap_id_t *id; + rm_rlock(&fasttrap_tp_lock, &tracker); bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)]; for (tp = bucket->ftb_data; tp != NULL; tp = tp->ftt_next) { @@ -320,6 +323,7 @@ fasttrap_return_common(struct reg *rp, u * is not essential to the correct execution of the process. */ if (tp == NULL) { + rm_runlock(&fasttrap_tp_lock, &tracker); return; } @@ -337,6 +341,7 @@ fasttrap_return_common(struct reg *rp, u pc - id->fti_probe->ftp_faddr, rp->fixreg[3], rp->fixreg[4], 0, 0); } + rm_runlock(&fasttrap_tp_lock, &tracker); } @@ -365,6 +370,7 @@ fasttrap_branch_taken(int bo, int bi, st int fasttrap_pid_probe(struct reg *rp) { + struct rm_priotracker tracker; proc_t *p = curproc; uintptr_t pc = rp->pc; uintptr_t new_pc = 0; @@ -395,8 +401,7 @@ fasttrap_pid_probe(struct reg *rp) curthread->t_dtrace_scrpc = 0; curthread->t_dtrace_astpc = 0; - - PROC_LOCK(p); + rm_rlock(&fasttrap_tp_lock, &tracker); pid = p->p_pid; bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)]; @@ -415,7 +420,7 @@ fasttrap_pid_probe(struct reg *rp) * fasttrap_ioctl), or somehow we have mislaid this tracepoint. */ if (tp == NULL) { - PROC_UNLOCK(p); + rm_runlock(&fasttrap_tp_lock, &tracker); return (-1); } @@ -469,7 +474,7 @@ fasttrap_pid_probe(struct reg *rp) * tracepoint again later if we need to light up any return probes. */ tp_local = *tp; - PROC_UNLOCK(p); + rm_runlock(&fasttrap_tp_lock, &tracker); tp = &tp_local; /*