From owner-svn-src-all@FreeBSD.ORG Tue Jul 6 10:28:20 2010 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5080A106564A; Tue, 6 Jul 2010 10:28:20 +0000 (UTC) (envelope-from rpaulo@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 3E39B8FC13; Tue, 6 Jul 2010 10:28:20 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o66ASKFe040994; Tue, 6 Jul 2010 10:28:20 GMT (envelope-from rpaulo@svn.freebsd.org) Received: (from rpaulo@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id o66ASKkH040992; Tue, 6 Jul 2010 10:28:20 GMT (envelope-from rpaulo@svn.freebsd.org) Message-Id: <201007061028.o66ASKkH040992@svn.freebsd.org> From: Rui Paulo Date: Tue, 6 Jul 2010 10:28:20 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r209721 - in head/sys/cddl/contrib/opensolaris/uts: common/sys intel/dtrace sparc/dtrace X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 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, 06 Jul 2010 10:28:20 -0000 Author: rpaulo Date: Tue Jul 6 10:28:19 2010 New Revision: 209721 URL: http://svn.freebsd.org/changeset/base/209721 Log: Merge from vendor-sys/opensolaris: * add fasttrap files Added: head/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h - copied unchanged from r209720, vendor-sys/opensolaris/dist/uts/common/sys/fasttrap_impl.h head/sys/cddl/contrib/opensolaris/uts/intel/dtrace/ - copied from r209720, vendor-sys/opensolaris/dist/uts/intel/dtrace/ head/sys/cddl/contrib/opensolaris/uts/sparc/dtrace/ - copied from r209720, vendor-sys/opensolaris/dist/uts/sparc/dtrace/ Modified: Directory Properties: head/sys/cddl/contrib/opensolaris/ (props changed) Copied: head/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h (from r209720, vendor-sys/opensolaris/dist/uts/common/sys/fasttrap_impl.h) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h Tue Jul 6 10:28:19 2010 (r209721, copy of r209720, vendor-sys/opensolaris/dist/uts/common/sys/fasttrap_impl.h) @@ -0,0 +1,192 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright 2008 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _FASTTRAP_IMPL_H +#define _FASTTRAP_IMPL_H + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include +#include +#include +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Fasttrap Providers, Probes and Tracepoints + * + * Each Solaris process can have multiple providers -- the pid provider as + * well as any number of user-level statically defined tracing (USDT) + * providers. Those providers are each represented by a fasttrap_provider_t. + * All providers for a given process have a pointer to a shared + * fasttrap_proc_t. The fasttrap_proc_t has two states: active or defunct. + * When the count of active providers goes to zero it becomes defunct; a + * provider drops its active count when it is removed individually or as part + * of a mass removal when a process exits or performs an exec. + * + * Each probe is represented by a fasttrap_probe_t which has a pointer to + * its associated provider as well as a list of fasttrap_id_tp_t structures + * which are tuples combining a fasttrap_id_t and a fasttrap_tracepoint_t. + * A fasttrap_tracepoint_t represents the actual point of instrumentation + * and it contains two lists of fasttrap_id_t structures (to be fired pre- + * and post-instruction emulation) that identify the probes attached to the + * tracepoint. Tracepoints also have a pointer to the fasttrap_proc_t for the + * process they trace which is used when looking up a tracepoint both when a + * probe fires and when enabling and disabling probes. + * + * It's important to note that probes are preallocated with the necessary + * number of tracepoints, but that tracepoints can be shared by probes and + * swapped between probes. If a probe's preallocated tracepoint is enabled + * (and, therefore, the associated probe is enabled), and that probe is + * then disabled, ownership of that tracepoint may be exchanged for an + * unused tracepoint belonging to another probe that was attached to the + * enabled tracepoint. + */ + +typedef struct fasttrap_proc { + pid_t ftpc_pid; /* process ID for this proc */ + uint64_t ftpc_acount; /* count of active providers */ + uint64_t ftpc_rcount; /* count of extant providers */ + kmutex_t ftpc_mtx; /* lock on all but acount */ + struct fasttrap_proc *ftpc_next; /* next proc in hash chain */ +} fasttrap_proc_t; + +typedef struct fasttrap_provider { + pid_t ftp_pid; /* process ID for this prov */ + char ftp_name[DTRACE_PROVNAMELEN]; /* prov name (w/o the pid) */ + dtrace_provider_id_t ftp_provid; /* DTrace provider handle */ + uint_t ftp_marked; /* mark for possible removal */ + uint_t ftp_retired; /* mark when retired */ + kmutex_t ftp_mtx; /* provider lock */ + kmutex_t ftp_cmtx; /* lock on creating probes */ + uint64_t ftp_rcount; /* enabled probes ref count */ + uint64_t ftp_ccount; /* consumers creating probes */ + uint64_t ftp_mcount; /* meta provider count */ + fasttrap_proc_t *ftp_proc; /* shared proc for all provs */ + struct fasttrap_provider *ftp_next; /* next prov in hash chain */ +} fasttrap_provider_t; + +typedef struct fasttrap_id fasttrap_id_t; +typedef struct fasttrap_probe fasttrap_probe_t; +typedef struct fasttrap_tracepoint fasttrap_tracepoint_t; + +struct fasttrap_id { + fasttrap_probe_t *fti_probe; /* referrring probe */ + fasttrap_id_t *fti_next; /* enabled probe list on tp */ + fasttrap_probe_type_t fti_ptype; /* probe type */ +}; + +typedef struct fasttrap_id_tp { + fasttrap_id_t fit_id; + fasttrap_tracepoint_t *fit_tp; +} fasttrap_id_tp_t; + +struct fasttrap_probe { + dtrace_id_t ftp_id; /* DTrace probe identifier */ + pid_t ftp_pid; /* pid for this probe */ + fasttrap_provider_t *ftp_prov; /* this probe's provider */ + uintptr_t ftp_faddr; /* associated function's addr */ + size_t ftp_fsize; /* associated function's size */ + uint64_t ftp_gen; /* modification generation */ + uint64_t ftp_ntps; /* number of tracepoints */ + uint8_t *ftp_argmap; /* native to translated args */ + uint8_t ftp_nargs; /* translated argument count */ + uint8_t ftp_enabled; /* is this probe enabled */ + char *ftp_xtypes; /* translated types index */ + char *ftp_ntypes; /* native types index */ + fasttrap_id_tp_t ftp_tps[1]; /* flexible array */ +}; + +#define FASTTRAP_ID_INDEX(id) \ +((fasttrap_id_tp_t *)(((char *)(id) - offsetof(fasttrap_id_tp_t, fit_id))) - \ +&(id)->fti_probe->ftp_tps[0]) + +struct fasttrap_tracepoint { + fasttrap_proc_t *ftt_proc; /* associated process struct */ + uintptr_t ftt_pc; /* address of tracepoint */ + pid_t ftt_pid; /* pid of tracepoint */ + fasttrap_machtp_t ftt_mtp; /* ISA-specific portion */ + fasttrap_id_t *ftt_ids; /* NULL-terminated list */ + fasttrap_id_t *ftt_retids; /* NULL-terminated list */ + fasttrap_tracepoint_t *ftt_next; /* link in global hash */ +}; + +typedef struct fasttrap_bucket { + kmutex_t ftb_mtx; /* bucket lock */ + void *ftb_data; /* data payload */ + + uint8_t ftb_pad[64 - sizeof (kmutex_t) - sizeof (void *)]; +} fasttrap_bucket_t; + +typedef struct fasttrap_hash { + ulong_t fth_nent; /* power-of-2 num. of entries */ + ulong_t fth_mask; /* fth_nent - 1 */ + fasttrap_bucket_t *fth_table; /* array of buckets */ +} fasttrap_hash_t; + +/* + * If at some future point these assembly functions become observable by + * DTrace, then these defines should become separate functions so that the + * fasttrap provider doesn't trigger probes during internal operations. + */ +#define fasttrap_copyout copyout +#define fasttrap_fuword32 fuword32 +#define fasttrap_suword32 suword32 + +#define fasttrap_fulword fulword +#define fasttrap_sulword sulword + +extern void fasttrap_sigtrap(proc_t *, kthread_t *, uintptr_t); + +extern dtrace_id_t fasttrap_probe_id; +extern fasttrap_hash_t fasttrap_tpoints; + +#define FASTTRAP_TPOINTS_INDEX(pid, pc) \ + (((pc) / sizeof (fasttrap_instr_t) + (pid)) & fasttrap_tpoints.fth_mask) + +/* + * Must be implemented by fasttrap_isa.c + */ +extern int fasttrap_tracepoint_init(proc_t *, fasttrap_tracepoint_t *, + uintptr_t, fasttrap_probe_type_t); +extern int fasttrap_tracepoint_install(proc_t *, fasttrap_tracepoint_t *); +extern int fasttrap_tracepoint_remove(proc_t *, fasttrap_tracepoint_t *); + +extern int fasttrap_pid_probe(struct regs *); +extern int fasttrap_return_probe(struct regs *); + +extern uint64_t fasttrap_pid_getarg(void *, dtrace_id_t, void *, int, int); +extern uint64_t fasttrap_usdt_getarg(void *, dtrace_id_t, void *, int, int); + +#ifdef __cplusplus +} +#endif + +#endif /* _FASTTRAP_IMPL_H */