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Annotation of XNU/osfmk/kern/profile.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  */
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !            28:  * All Rights Reserved.
        !            29:  * 
        !            30:  * Permission to use, copy, modify and distribute this software and its
        !            31:  * documentation is hereby granted, provided that both the copyright
        !            32:  * notice and this permission notice appear in all copies of the
        !            33:  * software, derivative works or modified versions, and any portions
        !            34:  * thereof, and that both notices appear in supporting documentation.
        !            35:  * 
        !            36:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            37:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            38:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            39:  * 
        !            40:  * Carnegie Mellon requests users of this software to return to
        !            41:  * 
        !            42:  *  Software Distribution Coordinator  or  [email protected]
        !            43:  *  School of Computer Science
        !            44:  *  Carnegie Mellon University
        !            45:  *  Pittsburgh PA 15213-3890
        !            46:  * 
        !            47:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            48:  * the rights to redistribute these changes.
        !            49:  */
        !            50: 
        !            51: /*
        !            52:  */
        !            53: 
        !            54: #ifndef _KERN_PROFILE_H
        !            55: #define _KERN_PROFILE_H
        !            56: 
        !            57: #include <mach/boolean.h>
        !            58: #include <vm/vm_kern.h> 
        !            59: 
        !            60: #define        NB_PROF_BUFFER          4       /* number of buffers servicing a */
        !            61: #define        SIZE_PROF_BUFFER        200     /* size of a profil buffer (in natural_t) */
        !            62:                                        /* -> at most 1 packet every 2 secs */
        !            63:                                        /*      profiled thread */
        !            64: 
        !            65: struct prof_data {
        !            66:        struct ipc_port *prof_port;     /* where to send a full buffer */
        !            67: 
        !            68:        struct buffer {
        !            69:            queue_chain_t p_list;
        !            70:            natural_t   *p_zone;        /* points to the actual storage area */
        !            71:            int p_index;                /* next slot to be filled */
        !            72:            int p_dropped;              /* # dropped samples when full */
        !            73:            boolean_t p_full;           /* is the current buffer full ? */ 
        !            74:            struct prof_data *p_prof;   /* base to get prof_port */
        !            75:            char p_wakeme;              /* do wakeup when sent */
        !            76:        } prof_area[NB_PROF_BUFFER];
        !            77: 
        !            78:        int             prof_index;     /* index of the buffer structure */
        !            79:                                        /*   currently in use */
        !            80: 
        !            81: };
        !            82: 
        !            83: typedef struct prof_data       *prof_data_t;
        !            84: #define NULLPROFDATA ((prof_data_t) 0)
        !            85: typedef struct buffer          *buffer_t;
        !            86: #define NULLPBUF ((buffer_t) 0)
        !            87: 
        !            88: /* Macros */
        !            89: 
        !            90: #define        set_pbuf_nb(pbuf, nb) \
        !            91:          (((nb) >= 0 && (nb) < NB_PROF_BUFFER) \
        !            92:         ? (pbuf)->prof_index = (nb), 1 \
        !            93:         : 0)
        !            94: 
        !            95: 
        !            96: #define        get_pbuf_nb(pbuf) \
        !            97:        (pbuf)->prof_index
        !            98: 
        !            99: 
        !           100: extern vm_map_t kernel_map; 
        !           101: 
        !           102: /* MACRO set_pbuf_value 
        !           103: ** 
        !           104: ** enters the value 'val' in the buffer 'pbuf' and returns the following
        !           105: ** indications:     0: means that a fatal error occured: the buffer was full
        !           106: **                       (it hasn't been sent yet)
        !           107: **                  1: means that a value has been inserted successfully
        !           108: **                 2: means that we'v just entered the last value causing 
        !           109: **                     the current buffer to be full.(must switch to 
        !           110: **                     another buffer and signal the sender to send it)
        !           111: */ 
        !           112: 
        !           113: #if    MACH_PROF
        !           114: 
        !           115: #define set_pbuf_value(pbuf, val) \
        !           116:         { \
        !           117:          register buffer_t a = &((pbuf)->prof_area[(pbuf)->prof_index]); \
        !           118:          register int i ;\
        !           119:          register boolean_t f = a->p_full; \
        !           120:                          \
        !           121:          if (f == TRUE ) {\
        !           122:             a->p_dropped++; \
        !           123:              *(val) = 0L; \
        !           124:          } else { \
        !           125:            i = a->p_index++; \
        !           126:            a->p_zone[i] = *(val); \
        !           127:            if (i == SIZE_PROF_BUFFER-1) { \
        !           128:                a->p_full = TRUE; \
        !           129:                *(val) = 2; \
        !           130:             } \
        !           131:             else \
        !           132:                *(val) = 1; \
        !           133:           } \
        !           134:        }
        !           135:          
        !           136: #define        reset_pbuf_area(pbuf) \
        !           137:        { \
        !           138:         int i; \
        !           139:         (pbuf)->prof_index = ((pbuf)->prof_index + 1) % NB_PROF_BUFFER; \
        !           140:         i = (pbuf)->prof_index; \
        !           141:         (pbuf)->prof_area[i].p_index = 0; \
        !           142:         (pbuf)->prof_area[i].p_dropped = 0; \
        !           143:        }
        !           144: 
        !           145: #endif /* MACH_PROF */
        !           146: 
        !           147: /*
        !           148: ** Global variable: the head of the queue of buffers to send 
        !           149: ** It is a queue with locks (uses macros from queue.h) and it
        !           150: ** is shared by hardclock() and the sender_thread() 
        !           151: */
        !           152: 
        !           153: mpqueue_head_t prof_queue; 
        !           154: 
        !           155: extern void    profile(
        !           156:                        natural_t       pc,         /* program counter */
        !           157:                        prof_data_t     pbuf);      /* trace/prof data area */
        !           158: 
        !           159: #if MACH_PROF
        !           160: 
        !           161: #define task_prof_init(task) \
        !           162:        task->task_profiled = FALSE; \
        !           163:        task->profil_buffer = NULLPROFDATA;
        !           164: 
        !           165: #define act_prof_init(thr_act, task) \
        !           166:        thr_act->act_profiled = task->task_profiled;    \
        !           167:        thr_act->profil_buffer = task->profil_buffer;
        !           168: 
        !           169: #define task_prof_deallocate(task) \
        !           170:        if (task->profil_buffer) \
        !           171:                task_sample(task, MACH_PORT_NULL); \
        !           172: 
        !           173: #define act_prof_deallocate(thr_act) \
        !           174:        if (thr_act->act_profiled_own && thr_act->profil_buffer)  \
        !           175:                thread_sample(thr_act, MACH_PORT_NULL); \
        !           176: 
        !           177: extern kern_return_t thread_sample(thread_act_t, ipc_port_t);
        !           178: extern kern_return_t task_sample(task_t, ipc_port_t);
        !           179: 
        !           180: #else /* !MACH_PROT */
        !           181: 
        !           182: #define task_prof_init(task)
        !           183: #define act_prof_init(thr_act, task)
        !           184: #define task_prof_deallocate(task)
        !           185: #define act_prof_deallocate(thr_act)
        !           186: 
        !           187:                
        !           188: #endif /* !MACH_PROF */
        !           189: 
        !           190: #endif /* _KERN_PROFILE_H */

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