The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/dtrace_bsd.h

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    1 /*-
    2  * Copyright (c) 2007-2008 John Birrell (jb@freebsd.org)
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/10.4/sys/sys/dtrace_bsd.h 282748 2015-05-11 07:54:39Z avg $
   27  *
   28  * This file contains BSD shims for Sun's DTrace code.
   29  */
   30 
   31 #ifndef _SYS_DTRACE_BSD_H
   32 #define _SYS_DTRACE_BSD_H
   33 
   34 /* Forward definitions: */
   35 struct mbuf;
   36 struct trapframe;
   37 struct thread;
   38 struct vattr;
   39 struct vnode;
   40 struct reg;
   41 struct devstat;
   42 struct bio;
   43 
   44 /*
   45  * The dtrace module handles traps that occur during a DTrace probe.
   46  * This type definition is used in the trap handler to provide a
   47  * hook for the dtrace module to register it's handler with.
   48  */
   49 typedef int (*dtrace_trap_func_t)(struct trapframe *, u_int);
   50 
   51 int     dtrace_trap(struct trapframe *, u_int);
   52 
   53 extern dtrace_trap_func_t       dtrace_trap_func;
   54 
   55 /*
   56  * A hook which removes active FBT probes before executing the double fault
   57  * handler. We want to ensure that DTrace doesn't trigger another trap, which
   58  * would result in a reset.
   59  */
   60 typedef int (*dtrace_invop_func_t)(uintptr_t, uintptr_t *, uintptr_t);
   61 typedef void (*dtrace_doubletrap_func_t)(void);
   62 extern  dtrace_invop_func_t     dtrace_invop_func;
   63 extern  dtrace_doubletrap_func_t        dtrace_doubletrap_func;
   64 
   65 /* Pid provider hooks */
   66 typedef int (*dtrace_pid_probe_ptr_t)(struct reg *);
   67 extern  dtrace_pid_probe_ptr_t  dtrace_pid_probe_ptr;
   68 typedef int (*dtrace_return_probe_ptr_t)(struct reg *);
   69 extern  dtrace_return_probe_ptr_t       dtrace_return_probe_ptr;
   70 
   71 /* Virtual time hook function type. */
   72 typedef void (*dtrace_vtime_switch_func_t)(struct thread *);
   73 
   74 extern int                      dtrace_vtime_active;
   75 extern dtrace_vtime_switch_func_t       dtrace_vtime_switch_func;
   76 
   77 /* The fasttrap module hooks into the fork, exit and exit. */
   78 typedef void (*dtrace_fork_func_t)(struct proc *, struct proc *);
   79 typedef void (*dtrace_execexit_func_t)(struct proc *);
   80 
   81 /* Global variable in kern_fork.c */
   82 extern dtrace_fork_func_t       dtrace_fasttrap_fork;
   83 
   84 /* Global variable in kern_exec.c */
   85 extern dtrace_execexit_func_t   dtrace_fasttrap_exec;
   86 
   87 /* Global variable in kern_exit.c */
   88 extern dtrace_execexit_func_t   dtrace_fasttrap_exit;
   89 
   90 /* The dtmalloc provider hooks into malloc. */
   91 typedef void (*dtrace_malloc_probe_func_t)(u_int32_t, uintptr_t arg0,
   92     uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4);
   93 
   94 extern dtrace_malloc_probe_func_t   dtrace_malloc_probe;
   95 
   96 /* dtnfsclient NFSv[34] access cache provider hooks. */
   97 typedef void (*dtrace_nfsclient_accesscache_flush_probe_func_t)(uint32_t,
   98     struct vnode *);
   99 extern dtrace_nfsclient_accesscache_flush_probe_func_t
  100     dtrace_nfsclient_accesscache_flush_done_probe;
  101 extern dtrace_nfsclient_accesscache_flush_probe_func_t
  102     dtrace_nfscl_accesscache_flush_done_probe;
  103 
  104 typedef void (*dtrace_nfsclient_accesscache_get_probe_func_t)(uint32_t,
  105     struct vnode *, uid_t, uint32_t);
  106 extern dtrace_nfsclient_accesscache_get_probe_func_t
  107     dtrace_nfsclient_accesscache_get_hit_probe,
  108     dtrace_nfsclient_accesscache_get_miss_probe;
  109 extern dtrace_nfsclient_accesscache_get_probe_func_t
  110     dtrace_nfscl_accesscache_get_hit_probe,
  111     dtrace_nfscl_accesscache_get_miss_probe;
  112 
  113 typedef void (*dtrace_nfsclient_accesscache_load_probe_func_t)(uint32_t,
  114     struct vnode *, uid_t, uint32_t, int);
  115 extern dtrace_nfsclient_accesscache_load_probe_func_t
  116     dtrace_nfsclient_accesscache_load_done_probe;
  117 extern dtrace_nfsclient_accesscache_load_probe_func_t
  118     dtrace_nfscl_accesscache_load_done_probe;
  119 
  120 /* dtnfsclient NFSv[234] attribute cache provider hooks. */
  121 typedef void (*dtrace_nfsclient_attrcache_flush_probe_func_t)(uint32_t,
  122     struct vnode *);
  123 extern dtrace_nfsclient_attrcache_flush_probe_func_t
  124     dtrace_nfsclient_attrcache_flush_done_probe;
  125 extern dtrace_nfsclient_attrcache_flush_probe_func_t
  126     dtrace_nfscl_attrcache_flush_done_probe;
  127 
  128 typedef void (*dtrace_nfsclient_attrcache_get_hit_probe_func_t)(uint32_t,
  129     struct vnode *, struct vattr *);
  130 extern dtrace_nfsclient_attrcache_get_hit_probe_func_t
  131     dtrace_nfsclient_attrcache_get_hit_probe;
  132 extern dtrace_nfsclient_attrcache_get_hit_probe_func_t
  133     dtrace_nfscl_attrcache_get_hit_probe;
  134 
  135 typedef void (*dtrace_nfsclient_attrcache_get_miss_probe_func_t)(uint32_t,
  136     struct vnode *);
  137 extern dtrace_nfsclient_attrcache_get_miss_probe_func_t
  138     dtrace_nfsclient_attrcache_get_miss_probe;
  139 extern dtrace_nfsclient_attrcache_get_miss_probe_func_t
  140     dtrace_nfscl_attrcache_get_miss_probe;
  141 
  142 typedef void (*dtrace_nfsclient_attrcache_load_probe_func_t)(uint32_t,
  143     struct vnode *, struct vattr *, int);
  144 extern dtrace_nfsclient_attrcache_load_probe_func_t
  145     dtrace_nfsclient_attrcache_load_done_probe;
  146 extern dtrace_nfsclient_attrcache_load_probe_func_t
  147     dtrace_nfscl_attrcache_load_done_probe;
  148 
  149 /* dtnfsclient NFSv[234] RPC provider hooks. */
  150 typedef void (*dtrace_nfsclient_nfs23_start_probe_func_t)(uint32_t,
  151     struct vnode *, struct mbuf *, struct ucred *, int);
  152 extern dtrace_nfsclient_nfs23_start_probe_func_t
  153     dtrace_nfsclient_nfs23_start_probe;
  154 extern dtrace_nfsclient_nfs23_start_probe_func_t
  155     dtrace_nfscl_nfs234_start_probe;
  156 
  157 typedef void (*dtrace_nfsclient_nfs23_done_probe_func_t)(uint32_t,
  158     struct vnode *, struct mbuf *, struct ucred *, int, int);
  159 extern dtrace_nfsclient_nfs23_done_probe_func_t
  160     dtrace_nfsclient_nfs23_done_probe;
  161 extern dtrace_nfsclient_nfs23_done_probe_func_t
  162     dtrace_nfscl_nfs234_done_probe;
  163 
  164 /* IO Provider hooks, really hook into devstat */
  165 typedef void (*dtrace_io_start_probe_func_t)(uint32_t, struct bio *,
  166                                              struct devstat *);
  167 extern dtrace_io_start_probe_func_t dtrace_io_start_probe;
  168 
  169 typedef void (*dtrace_io_done_probe_func_t)(uint32_t, struct bio *,
  170                                             struct devstat *);
  171 extern dtrace_io_done_probe_func_t dtrace_io_done_probe;
  172 
  173 typedef void (*dtrace_io_wait_start_probe_func_t)(uint32_t, uintptr_t *, 
  174                                                   struct devstat *);
  175 extern dtrace_io_wait_start_probe_func_t dtrace_io_wait_start_probe;
  176 
  177 typedef void (*dtrace_io_wait_done_probe_func_t)(uint32_t, uintptr_t *, 
  178                                                  struct devstat *);
  179 extern dtrace_io_wait_done_probe_func_t dtrace_io_wait_done_probe;
  180 
  181 /*
  182  * Functions which allow the dtrace module to check that the kernel 
  183  * hooks have been compiled with sufficient space for it's private
  184  * structures.
  185  */
  186 size_t  kdtrace_proc_size(void);
  187 size_t  kdtrace_thread_size(void);
  188 
  189 /*
  190  * OpenSolaris compatible time functions returning nanoseconds.
  191  * On OpenSolaris these return hrtime_t which we define as uint64_t.
  192  */
  193 uint64_t        dtrace_gethrtime(void);
  194 uint64_t        dtrace_gethrestime(void);
  195 
  196 #endif /* _SYS_DTRACE_BSD_H */

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