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 /*      $NetBSD: dtrace_bsd.h,v 1.9 2018/04/19 21:19:07 christos Exp $  */
    2 
    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: src/sys/sys/dtrace_bsd.h,v 1.3.2.1 2009/08/03 08:13:06 kensmith Exp $
   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 #if defined(_KERNEL_OPT)
   37 #include "opt_dtrace.h"
   38 #endif
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/kernel.h>
   43 #include <sys/kmem.h>
   44 #include <sys/proc.h>
   45 
   46 /* Forward definitions: */
   47 struct mbuf;
   48 struct trapframe;
   49 struct lwp;
   50 struct vattr;
   51 struct vnode;
   52 struct ucred;
   53 
   54 /*
   55  * Cyclic clock function type definition used to hook the cyclic
   56  * subsystem into the appropriate timer interrupt.
   57  */
   58 typedef void (*cyclic_clock_func_t)(struct clockframe *);
   59 extern cyclic_clock_func_t      cyclic_clock_func[];
   60 
   61 /*
   62  * The dtrace module handles traps that occur during a DTrace probe.
   63  * This type definition is used in the trap handler to provide a
   64  * hook for the dtrace module to register its handler with.
   65  */
   66 typedef int (*dtrace_trap_func_t)(struct trapframe *, u_int);
   67 
   68 int     dtrace_trap(struct trapframe *, u_int);
   69 
   70 extern dtrace_trap_func_t       dtrace_trap_func;
   71 
   72 /* Used by the machine dependent trap() code. */
   73 typedef int (*dtrace_invop_func_t)(uintptr_t, uintptr_t *, uintptr_t);
   74 typedef void (*dtrace_doubletrap_func_t)(void);
   75 
   76 /* Global variables in trap.c */
   77 extern  dtrace_invop_func_t     dtrace_invop_func;
   78 extern  dtrace_doubletrap_func_t        dtrace_doubletrap_func;
   79 
   80 /* Virtual time hook function type. */
   81 typedef void (*dtrace_vtime_switch_func_t)(struct lwp *);
   82 
   83 extern int                      dtrace_vtime_active;
   84 extern dtrace_vtime_switch_func_t       dtrace_vtime_switch_func;
   85 
   86 /* The fasttrap module hooks into the fork, exit and exit. */
   87 typedef void (*dtrace_fork_func_t)(struct proc *, struct proc *);
   88 typedef void (*dtrace_execexit_func_t)(struct proc *);
   89 
   90 /* Global variable in kern_fork.c */
   91 extern dtrace_fork_func_t       dtrace_fasttrap_fork;
   92 
   93 /* Global variable in kern_exec.c */
   94 extern dtrace_execexit_func_t   dtrace_fasttrap_exec;
   95 
   96 /* Global variable in kern_exit.c */
   97 extern dtrace_execexit_func_t   dtrace_fasttrap_exit;
   98 
   99 /* The dtmalloc provider hooks into malloc. */
  100 typedef void (*dtrace_malloc_probe_func_t)(u_int32_t, uintptr_t arg0,
  101     uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4);
  102 
  103 extern dtrace_malloc_probe_func_t   dtrace_malloc_probe;
  104 
  105 /* dtnfsclient NFSv3 access cache provider hooks. */
  106 typedef void (*dtrace_nfsclient_accesscache_flush_probe_func_t)(uint32_t,
  107     struct vnode *);
  108 extern dtrace_nfsclient_accesscache_flush_probe_func_t
  109     dtrace_nfsclient_accesscache_flush_done_probe;
  110 
  111 typedef void (*dtrace_nfsclient_accesscache_get_probe_func_t)(uint32_t,
  112     struct vnode *, uid_t, uint32_t);
  113 extern dtrace_nfsclient_accesscache_get_probe_func_t
  114     dtrace_nfsclient_accesscache_get_hit_probe,
  115     dtrace_nfsclient_accesscache_get_miss_probe;
  116 
  117 typedef void (*dtrace_nfsclient_accesscache_load_probe_func_t)(uint32_t,
  118     struct vnode *, uid_t, uint32_t, int);
  119 extern dtrace_nfsclient_accesscache_load_probe_func_t
  120     dtrace_nfsclient_accesscache_load_done_probe;
  121 
  122 /* dtnfsclient NFSv[23] attribute cache provider hooks. */
  123 typedef void (*dtrace_nfsclient_attrcache_flush_probe_func_t)(uint32_t,
  124     struct vnode *);
  125 extern dtrace_nfsclient_attrcache_flush_probe_func_t
  126     dtrace_nfsclient_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 
  133 typedef void (*dtrace_nfsclient_attrcache_get_miss_probe_func_t)(uint32_t,
  134     struct vnode *);
  135 extern dtrace_nfsclient_attrcache_get_miss_probe_func_t
  136     dtrace_nfsclient_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 
  143 /* dtnfsclient NFSv[23] RPC provider hooks. */
  144 typedef void (*dtrace_nfsclient_nfs23_start_probe_func_t)(uint32_t,
  145     struct vnode *, struct mbuf *, struct ucred *, int);
  146 extern dtrace_nfsclient_nfs23_start_probe_func_t
  147     dtrace_nfsclient_nfs23_start_probe;
  148 
  149 typedef void (*dtrace_nfsclient_nfs23_done_probe_func_t)(uint32_t,
  150     struct vnode *, struct mbuf *, struct ucred *, int, int);
  151 extern dtrace_nfsclient_nfs23_done_probe_func_t
  152     dtrace_nfsclient_nfs23_done_probe;
  153 
  154 /*
  155  * OpenSolaris compatible time functions returning nanoseconds.
  156  * On OpenSolaris these return hrtime_t which we define as uint64_t.
  157  */
  158 uint64_t        dtrace_gethrtime(void);
  159 uint64_t        dtrace_gethrestime(void);
  160 
  161 /* sizes based on DTrace structure requirements */
  162 #define KDTRACE_PROC_SIZE       64
  163 #define KDTRACE_PROC_ZERO       8
  164 #define KDTRACE_THREAD_SIZE     256
  165 #define KDTRACE_THREAD_ZERO     64
  166 
  167 /*
  168  * Functions for managing the opaque DTrace memory areas for 
  169  * processes and lwps.
  170  */
  171 
  172 static __inline size_t  kdtrace_proc_size(void);
  173 static __inline void kdtrace_proc_ctor(void *, struct proc *);
  174 static __inline void kdtrace_proc_dtor(void *, struct proc *);
  175 static __inline size_t  kdtrace_thread_size(void);
  176 static __inline void kdtrace_thread_ctor(void *, struct lwp *);
  177 static __inline void kdtrace_thread_dtor(void *, struct lwp *);
  178 
  179 
  180 /* Return the DTrace process data size compiled in the kernel hooks. */
  181 static __inline size_t
  182 kdtrace_proc_size(void)
  183 {
  184 
  185         return KDTRACE_PROC_SIZE;
  186 }
  187 
  188 /* Return the DTrace thread data size compiled in the kernel hooks. */
  189 static __inline size_t
  190 kdtrace_thread_size(void)
  191 {
  192 
  193         return KDTRACE_THREAD_SIZE;
  194 }
  195 
  196 static __inline void
  197 kdtrace_proc_ctor(void *arg, struct proc *p)
  198 {
  199 
  200 #ifdef KDTRACE_HOOKS
  201         p->p_dtrace = kmem_zalloc(KDTRACE_PROC_SIZE, KM_SLEEP);
  202 #endif
  203 }
  204 
  205 static __inline void
  206 kdtrace_proc_dtor(void *arg, struct proc *p)
  207 {
  208 
  209 #ifdef KDTRACE_HOOKS
  210         if (p->p_dtrace != NULL) {
  211                 kmem_free(p->p_dtrace, KDTRACE_PROC_SIZE);
  212                 p->p_dtrace = NULL;
  213         }
  214 #endif
  215 }
  216 
  217 static __inline void
  218 kdtrace_thread_ctor(void *arg, struct lwp *l)
  219 {
  220 
  221 #ifdef KDTRACE_HOOKS
  222         l->l_dtrace = kmem_zalloc(KDTRACE_THREAD_SIZE, KM_SLEEP);
  223 #endif
  224 }
  225 
  226 static __inline void
  227 kdtrace_thread_dtor(void *arg, struct lwp *l)
  228 {
  229 
  230 #ifdef KDTRACE_HOOKS
  231         if (l->l_dtrace != NULL) {
  232                 kmem_free(l->l_dtrace, KDTRACE_THREAD_SIZE);
  233                 l->l_dtrace = NULL;
  234         }
  235 #endif
  236 }
  237 
  238 #endif /* _SYS_DTRACE_BSD_H */

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