sys/sys/pmclog.h

   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  * $FreeBSD$
  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 } __packed;
 117
 118 struct pmclog_pmcallocate {
 119         PMCLOG_ENTRY_HEADER
 120         uint32_t                pl_pmcid;
 121         uint32_t                pl_event;
 122         uint32_t                pl_flags;
 123 } __packed;
 124
 125 struct pmclog_pmcattach {
 126         PMCLOG_ENTRY_HEADER
 127         uint32_t                pl_pmcid;
 128         uint32_t                pl_pid;
 129         char                    pl_pathname[PATH_MAX];
 130 } __packed;
 131
 132 struct pmclog_pmcdetach {
 133         PMCLOG_ENTRY_HEADER
 134         uint32_t                pl_pmcid;
 135         uint32_t                pl_pid;
 136 } __packed;
 137
 138 struct pmclog_proccsw {
 139         PMCLOG_ENTRY_HEADER
 140         uint32_t                pl_pmcid;
 141         uint64_t                pl_value;       /* keep 8 byte aligned */
 142         uint32_t                pl_pid;
 143 } __packed;
 144
 145 struct pmclog_procexec {
 146         PMCLOG_ENTRY_HEADER
 147         uint32_t                pl_pid;
 148         char                    pl_pathname[PATH_MAX];
 149 } __packed;
 150
 151 struct pmclog_procexit {
 152         PMCLOG_ENTRY_HEADER
 153         uint32_t                pl_pmcid;
 154         uint64_t                pl_value;       /* keep 8 byte aligned */
 155         uint32_t                pl_pid;
 156 } __packed;
 157
 158 struct pmclog_procfork {
 159         PMCLOG_ENTRY_HEADER
 160         uint32_t                pl_oldpid;
 161         uint32_t                pl_newpid;
 162 } __packed;
 163
 164 struct pmclog_sysexit {
 165         PMCLOG_ENTRY_HEADER
 166         uint32_t                pl_pid;
 167 } __packed;
 168
 169 struct pmclog_userdata {
 170         PMCLOG_ENTRY_HEADER
 171         uint32_t                pl_userdata;
 172 } __packed;
 173
 174 union pmclog_entry {            /* only used to size scratch areas */
 175         struct pmclog_closelog          pl_cl;
 176         struct pmclog_dropnotify        pl_dn;
 177         struct pmclog_initialize        pl_i;
 178         struct pmclog_pcsample          pl_s;
 179         struct pmclog_pmcallocate       pl_a;
 180         struct pmclog_pmcattach         pl_t;
 181         struct pmclog_pmcdetach         pl_d;
 182         struct pmclog_proccsw           pl_c;
 183         struct pmclog_procexec          pl_x;
 184         struct pmclog_procexit          pl_e;
 185         struct pmclog_procfork          pl_f;
 186         struct pmclog_sysexit           pl_se;
 187         struct pmclog_userdata          pl_u;
 188 };
 189
 190 #define PMCLOG_HEADER_MAGIC                                     0xEEU
 191
 192 #define PMCLOG_HEADER_TO_LENGTH(H)                              \
 193         ((H) & 0x0000FFFF)
 194 #define PMCLOG_HEADER_TO_TYPE(H)                                \
 195         (((H) & 0x00FF0000) >> 16)
 196 #define PMCLOG_HEADER_TO_MAGIC(H)                               \
 197         (((H) & 0xFF000000) >> 24)
 198 #define PMCLOG_HEADER_CHECK_MAGIC(H)                            \
 199         (PMCLOG_HEADER_TO_MAGIC(H) == PMCLOG_HEADER_MAGIC)
 200
 201 #ifdef  _KERNEL
 202
 203 /*
 204  * Prototypes
 205  */
 206 int     pmclog_configure_log(struct pmc_owner *_po, int _logfd);
 207 int     pmclog_deconfigure_log(struct pmc_owner *_po);
 208 int     pmclog_flush(struct pmc_owner *_po);
 209 void    pmclog_initialize(void);
 210 void    pmclog_process_closelog(struct pmc_owner *po);
 211 void    pmclog_process_dropnotify(struct pmc_owner *po);
 212 void    pmclog_process_mappingchange(struct pmc_owner *po, pid_t pid, int type,
 213     uintfptr_t start, uintfptr_t end, char *path);
 214 void    pmclog_process_pcsample(struct pmc *_pm, struct pmc_sample *_ps);
 215 void    pmclog_process_pmcallocate(struct pmc *_pm);
 216 void    pmclog_process_pmcattach(struct pmc *_pm, pid_t _pid, char *_path);
 217 void    pmclog_process_pmcdetach(struct pmc *_pm, pid_t _pid);
 218 void    pmclog_process_proccsw(struct pmc *_pm, struct pmc_process *_pp,
 219     pmc_value_t _v);
 220 void    pmclog_process_procexec(struct pmc_owner *_po, pid_t _pid, char *_path);
 221 void    pmclog_process_procexit(struct pmc *_pm, struct pmc_process *_pp);
 222 void    pmclog_process_procfork(struct pmc_owner *_po, pid_t _oldpid, pid_t _newpid);
 223 void    pmclog_process_sysexit(struct pmc_owner *_po, pid_t _pid);
 224 int     pmclog_process_userlog(struct pmc_owner *_po,
 225     struct pmc_op_writelog *_wl);
 226 void    pmclog_shutdown(void);
 227 #endif  /* _KERNEL */
 228
 229 #endif  /* _SYS_PMCLOG_H_ */