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

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