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/pmclog.h

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    1 /*-
    2  * Copyright (c) 2005 Joseph Koshy
    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/6.1/sys/sys/pmclog.h 158179 2006-04-30 16:44:43Z cvs2svn $
   27  */
   28 
   29 #ifndef _SYS_PMCLOG_H_
   30 #define _SYS_PMCLOG_H_
   31 
   32 #include <sys/pmc.h>
   33 
   34 enum pmclog_type {
   35         PMCLOG_TYPE_CLOSELOG,
   36         PMCLOG_TYPE_DROPNOTIFY,
   37         PMCLOG_TYPE_INITIALIZE,
   38         PMCLOG_TYPE_MAPPINGCHANGE,
   39         PMCLOG_TYPE_PCSAMPLE,
   40         PMCLOG_TYPE_PMCALLOCATE,
   41         PMCLOG_TYPE_PMCATTACH,
   42         PMCLOG_TYPE_PMCDETACH,
   43         PMCLOG_TYPE_PROCCSW,
   44         PMCLOG_TYPE_PROCEXEC,
   45         PMCLOG_TYPE_PROCEXIT,
   46         PMCLOG_TYPE_PROCFORK,
   47         PMCLOG_TYPE_SYSEXIT,
   48         PMCLOG_TYPE_USERDATA
   49 };
   50 
   51 #define PMCLOG_MAPPING_INSERT                   0x01
   52 #define PMCLOG_MAPPING_DELETE                   0x02
   53 
   54 /*
   55  * A log entry descriptor comprises of a 32 bit header and a 64 bit
   56  * time stamp followed by as many 32 bit words are required to record
   57  * the event.
   58  *
   59  * Header field format:
   60  *
   61  *  31           24           16                                   0
   62  *   +------------+------------+-----------------------------------+
   63  *   |    MAGIC   |    TYPE    |               LENGTH              |
   64  *   +------------+------------+-----------------------------------+
   65  *
   66  * MAGIC        is the constant PMCLOG_HEADER_MAGIC.
   67  * TYPE         contains a value of type enum pmclog_type.
   68  * LENGTH       contains the length of the event record, in bytes.
   69  */
   70 
   71 #define PMCLOG_ENTRY_HEADER                             \
   72         uint32_t                pl_header;              \
   73         uint32_t                pl_ts_sec;              \
   74         uint32_t                pl_ts_nsec;
   75 
   76 
   77 /*
   78  * The following structures are used to describe the size of each kind
   79  * of log entry to sizeof().  To keep the compiler from adding
   80  * padding, the fields of each structure are aligned to their natural
   81  * boundaries, and the structures are marked as 'packed'.
   82  *
   83  * The actual reading and writing of the log file is always in terms
   84  * of 4 byte quantities.
   85  */
   86 
   87 struct pmclog_closelog {
   88         PMCLOG_ENTRY_HEADER
   89 };
   90 
   91 struct pmclog_dropnotify {
   92         PMCLOG_ENTRY_HEADER
   93 };
   94 
   95 struct pmclog_initialize {
   96         PMCLOG_ENTRY_HEADER
   97         uint32_t                pl_version;     /* driver version */
   98         uint32_t                pl_cpu;         /* enum pmc_cputype */
   99 } __packed;
  100 
  101 struct pmclog_mappingchange {
  102         PMCLOG_ENTRY_HEADER
  103         uint32_t                pl_type;
  104         uintfptr_t              pl_start;       /* 8 byte aligned */
  105         uintfptr_t              pl_end;
  106         uint32_t                pl_pid;
  107         char                    pl_pathname[PATH_MAX];
  108 } __packed;
  109 
  110 
  111 struct pmclog_pcsample {
  112         PMCLOG_ENTRY_HEADER
  113         uint32_t                pl_pid;
  114         uintfptr_t              pl_pc;          /* 8 byte aligned */
  115         uint32_t                pl_pmcid;
  116         uint32_t                pl_usermode;
  117 } __packed;
  118 
  119 struct pmclog_pmcallocate {
  120         PMCLOG_ENTRY_HEADER
  121         uint32_t                pl_pmcid;
  122         uint32_t                pl_event;
  123         uint32_t                pl_flags;
  124 } __packed;
  125 
  126 struct pmclog_pmcattach {
  127         PMCLOG_ENTRY_HEADER
  128         uint32_t                pl_pmcid;
  129         uint32_t                pl_pid;
  130         char                    pl_pathname[PATH_MAX];
  131 } __packed;
  132 
  133 struct pmclog_pmcdetach {
  134         PMCLOG_ENTRY_HEADER
  135         uint32_t                pl_pmcid;
  136         uint32_t                pl_pid;
  137 } __packed;
  138 
  139 struct pmclog_proccsw {
  140         PMCLOG_ENTRY_HEADER
  141         uint32_t                pl_pmcid;
  142         uint64_t                pl_value;       /* keep 8 byte aligned */
  143         uint32_t                pl_pid;
  144 } __packed;
  145 
  146 struct pmclog_procexec {
  147         PMCLOG_ENTRY_HEADER
  148         uint32_t                pl_pid;
  149         uintfptr_t              pl_start;       /* keep 8 byte aligned */
  150         uint32_t                pl_pmcid;
  151         char                    pl_pathname[PATH_MAX];
  152 } __packed;
  153 
  154 struct pmclog_procexit {
  155         PMCLOG_ENTRY_HEADER
  156         uint32_t                pl_pmcid;
  157         uint64_t                pl_value;       /* keep 8 byte aligned */
  158         uint32_t                pl_pid;
  159 } __packed;
  160 
  161 struct pmclog_procfork {
  162         PMCLOG_ENTRY_HEADER
  163         uint32_t                pl_oldpid;
  164         uint32_t                pl_newpid;
  165 } __packed;
  166 
  167 struct pmclog_sysexit {
  168         PMCLOG_ENTRY_HEADER
  169         uint32_t                pl_pid;
  170 } __packed;
  171 
  172 struct pmclog_userdata {
  173         PMCLOG_ENTRY_HEADER
  174         uint32_t                pl_userdata;
  175 } __packed;
  176 
  177 union pmclog_entry {            /* only used to size scratch areas */
  178         struct pmclog_closelog          pl_cl;
  179         struct pmclog_dropnotify        pl_dn;
  180         struct pmclog_initialize        pl_i;
  181         struct pmclog_pcsample          pl_s;
  182         struct pmclog_pmcallocate       pl_a;
  183         struct pmclog_pmcattach         pl_t;
  184         struct pmclog_pmcdetach         pl_d;
  185         struct pmclog_proccsw           pl_c;
  186         struct pmclog_procexec          pl_x;
  187         struct pmclog_procexit          pl_e;
  188         struct pmclog_procfork          pl_f;
  189         struct pmclog_sysexit           pl_se;
  190         struct pmclog_userdata          pl_u;
  191 };
  192 
  193 #define PMCLOG_HEADER_MAGIC                                     0xEEU
  194 
  195 #define PMCLOG_HEADER_TO_LENGTH(H)                              \
  196         ((H) & 0x0000FFFF)
  197 #define PMCLOG_HEADER_TO_TYPE(H)                                \
  198         (((H) & 0x00FF0000) >> 16)
  199 #define PMCLOG_HEADER_TO_MAGIC(H)                               \
  200         (((H) & 0xFF000000) >> 24)
  201 #define PMCLOG_HEADER_CHECK_MAGIC(H)                            \
  202         (PMCLOG_HEADER_TO_MAGIC(H) == PMCLOG_HEADER_MAGIC)
  203 
  204 #ifdef  _KERNEL
  205 
  206 /*
  207  * Prototypes
  208  */
  209 int     pmclog_configure_log(struct pmc_owner *_po, int _logfd);
  210 int     pmclog_deconfigure_log(struct pmc_owner *_po);
  211 int     pmclog_flush(struct pmc_owner *_po);
  212 void    pmclog_initialize(void);
  213 void    pmclog_process_closelog(struct pmc_owner *po);
  214 void    pmclog_process_dropnotify(struct pmc_owner *po);
  215 void    pmclog_process_mappingchange(struct pmc_owner *po, pid_t pid, int type,
  216     uintfptr_t start, uintfptr_t end, char *path);
  217 void    pmclog_process_pcsample(struct pmc *_pm, struct pmc_sample *_ps);
  218 void    pmclog_process_pmcallocate(struct pmc *_pm);
  219 void    pmclog_process_pmcattach(struct pmc *_pm, pid_t _pid, char *_path);
  220 void    pmclog_process_pmcdetach(struct pmc *_pm, pid_t _pid);
  221 void    pmclog_process_proccsw(struct pmc *_pm, struct pmc_process *_pp,
  222     pmc_value_t _v);
  223 void    pmclog_process_procexec(struct pmc_owner *_po, pmc_id_t _pmid, pid_t _pid,
  224     uintfptr_t _startaddr, char *_path);
  225 void    pmclog_process_procexit(struct pmc *_pm, struct pmc_process *_pp);
  226 void    pmclog_process_procfork(struct pmc_owner *_po, pid_t _oldpid, pid_t _newpid);
  227 void    pmclog_process_sysexit(struct pmc_owner *_po, pid_t _pid);
  228 int     pmclog_process_userlog(struct pmc_owner *_po,
  229     struct pmc_op_writelog *_wl);
  230 void    pmclog_shutdown(void);
  231 #endif  /* _KERNEL */
  232 
  233 #endif  /* _SYS_PMCLOG_H_ */

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