1 /*- 2 * Copyright (c) 2005-2007, Joseph Koshy 3 * Copyright (c) 2007 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * Portions of this software were developed by A. Joseph Koshy under 7 * sponsorship from the FreeBSD Foundation and Google, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #ifndef _SYS_PMCLOG_H_ 34 #define _SYS_PMCLOG_H_ 35 36 #include <sys/pmc.h> 37 38 enum pmclog_type { 39 /* V1 ABI */ 40 PMCLOG_TYPE_CLOSELOG, 41 PMCLOG_TYPE_DROPNOTIFY, 42 PMCLOG_TYPE_INITIALIZE, 43 PMCLOG_TYPE_MAPPINGCHANGE, /* unused in v1 */ 44 PMCLOG_TYPE_PCSAMPLE, 45 PMCLOG_TYPE_PMCALLOCATE, 46 PMCLOG_TYPE_PMCATTACH, 47 PMCLOG_TYPE_PMCDETACH, 48 PMCLOG_TYPE_PROCCSW, 49 PMCLOG_TYPE_PROCEXEC, 50 PMCLOG_TYPE_PROCEXIT, 51 PMCLOG_TYPE_PROCFORK, 52 PMCLOG_TYPE_SYSEXIT, 53 PMCLOG_TYPE_USERDATA, 54 /* 55 * V2 ABI 56 * 57 * The MAP_{IN,OUT} event types obsolete the MAPPING_CHANGE 58 * event type. The CALLCHAIN event type obsoletes the 59 * PCSAMPLE event type. 60 */ 61 PMCLOG_TYPE_MAP_IN, 62 PMCLOG_TYPE_MAP_OUT, 63 PMCLOG_TYPE_CALLCHAIN 64 }; 65 66 /* 67 * A log entry descriptor comprises of a 32 bit header and a 64 bit 68 * time stamp followed by as many 32 bit words are required to record 69 * the event. 70 * 71 * Header field format: 72 * 73 * 31 24 16 0 74 * +------------+------------+-----------------------------------+ 75 * | MAGIC | TYPE | LENGTH | 76 * +------------+------------+-----------------------------------+ 77 * 78 * MAGIC is the constant PMCLOG_HEADER_MAGIC. 79 * TYPE contains a value of type enum pmclog_type. 80 * LENGTH contains the length of the event record, in bytes. 81 */ 82 83 #define PMCLOG_ENTRY_HEADER \ 84 uint32_t pl_header; \ 85 uint32_t pl_ts_sec; \ 86 uint32_t pl_ts_nsec; 87 88 89 /* 90 * The following structures are used to describe the size of each kind 91 * of log entry to sizeof(). To keep the compiler from adding 92 * padding, the fields of each structure are aligned to their natural 93 * boundaries, and the structures are marked as 'packed'. 94 * 95 * The actual reading and writing of the log file is always in terms 96 * of 4 byte quantities. 97 */ 98 99 struct pmclog_callchain { 100 PMCLOG_ENTRY_HEADER 101 uint32_t pl_pid; 102 uint32_t pl_pmcid; 103 uint32_t pl_cpuflags; 104 /* 8 byte aligned */ 105 uintptr_t pl_pc[PMC_CALLCHAIN_DEPTH_MAX]; 106 } __packed; 107 108 #define PMC_CALLCHAIN_CPUFLAGS_TO_CPU(CF) (((CF) >> 16) & 0xFFFF) 109 #define PMC_CALLCHAIN_CPUFLAGS_TO_USERMODE(CF) ((CF) & PMC_CC_F_USERSPACE) 110 #define PMC_CALLCHAIN_TO_CPUFLAGS(CPU,FLAGS) \ 111 (((CPU) << 16) | ((FLAGS) & 0xFFFF)) 112 113 struct pmclog_closelog { 114 PMCLOG_ENTRY_HEADER 115 }; 116 117 struct pmclog_dropnotify { 118 PMCLOG_ENTRY_HEADER 119 }; 120 121 struct pmclog_initialize { 122 PMCLOG_ENTRY_HEADER 123 uint32_t pl_version; /* driver version */ 124 uint32_t pl_cpu; /* enum pmc_cputype */ 125 } __packed; 126 127 struct pmclog_map_in { 128 PMCLOG_ENTRY_HEADER 129 uint32_t pl_pid; 130 uintfptr_t pl_start; /* 8 byte aligned */ 131 char pl_pathname[PATH_MAX]; 132 } __packed; 133 134 struct pmclog_map_out { 135 PMCLOG_ENTRY_HEADER 136 uint32_t pl_pid; 137 uintfptr_t pl_start; /* 8 byte aligned */ 138 uintfptr_t pl_end; 139 } __packed; 140 141 struct pmclog_pcsample { 142 PMCLOG_ENTRY_HEADER 143 uint32_t pl_pid; 144 uintfptr_t pl_pc; /* 8 byte aligned */ 145 uint32_t pl_pmcid; 146 uint32_t pl_usermode; 147 } __packed; 148 149 struct pmclog_pmcallocate { 150 PMCLOG_ENTRY_HEADER 151 uint32_t pl_pmcid; 152 uint32_t pl_event; 153 uint32_t pl_flags; 154 } __packed; 155 156 struct pmclog_pmcattach { 157 PMCLOG_ENTRY_HEADER 158 uint32_t pl_pmcid; 159 uint32_t pl_pid; 160 char pl_pathname[PATH_MAX]; 161 } __packed; 162 163 struct pmclog_pmcdetach { 164 PMCLOG_ENTRY_HEADER 165 uint32_t pl_pmcid; 166 uint32_t pl_pid; 167 } __packed; 168 169 struct pmclog_proccsw { 170 PMCLOG_ENTRY_HEADER 171 uint32_t pl_pmcid; 172 uint64_t pl_value; /* keep 8 byte aligned */ 173 uint32_t pl_pid; 174 } __packed; 175 176 struct pmclog_procexec { 177 PMCLOG_ENTRY_HEADER 178 uint32_t pl_pid; 179 uintfptr_t pl_start; /* keep 8 byte aligned */ 180 uint32_t pl_pmcid; 181 char pl_pathname[PATH_MAX]; 182 } __packed; 183 184 struct pmclog_procexit { 185 PMCLOG_ENTRY_HEADER 186 uint32_t pl_pmcid; 187 uint64_t pl_value; /* keep 8 byte aligned */ 188 uint32_t pl_pid; 189 } __packed; 190 191 struct pmclog_procfork { 192 PMCLOG_ENTRY_HEADER 193 uint32_t pl_oldpid; 194 uint32_t pl_newpid; 195 } __packed; 196 197 struct pmclog_sysexit { 198 PMCLOG_ENTRY_HEADER 199 uint32_t pl_pid; 200 } __packed; 201 202 struct pmclog_userdata { 203 PMCLOG_ENTRY_HEADER 204 uint32_t pl_userdata; 205 } __packed; 206 207 union pmclog_entry { /* only used to size scratch areas */ 208 struct pmclog_callchain pl_cc; 209 struct pmclog_closelog pl_cl; 210 struct pmclog_dropnotify pl_dn; 211 struct pmclog_initialize pl_i; 212 struct pmclog_map_in pl_mi; 213 struct pmclog_map_out pl_mo; 214 struct pmclog_pcsample pl_s; 215 struct pmclog_pmcallocate pl_a; 216 struct pmclog_pmcattach pl_t; 217 struct pmclog_pmcdetach pl_d; 218 struct pmclog_proccsw pl_c; 219 struct pmclog_procexec pl_x; 220 struct pmclog_procexit pl_e; 221 struct pmclog_procfork pl_f; 222 struct pmclog_sysexit pl_se; 223 struct pmclog_userdata pl_u; 224 }; 225 226 #define PMCLOG_HEADER_MAGIC 0xEEU 227 228 #define PMCLOG_HEADER_TO_LENGTH(H) \ 229 ((H) & 0x0000FFFF) 230 #define PMCLOG_HEADER_TO_TYPE(H) \ 231 (((H) & 0x00FF0000) >> 16) 232 #define PMCLOG_HEADER_TO_MAGIC(H) \ 233 (((H) & 0xFF000000) >> 24) 234 #define PMCLOG_HEADER_CHECK_MAGIC(H) \ 235 (PMCLOG_HEADER_TO_MAGIC(H) == PMCLOG_HEADER_MAGIC) 236 237 #ifdef _KERNEL 238 239 /* 240 * Prototypes 241 */ 242 int pmclog_configure_log(struct pmc_mdep *_md, struct pmc_owner *_po, 243 int _logfd); 244 int pmclog_deconfigure_log(struct pmc_owner *_po); 245 int pmclog_flush(struct pmc_owner *_po); 246 void pmclog_initialize(void); 247 void pmclog_process_callchain(struct pmc *_pm, struct pmc_sample *_ps); 248 void pmclog_process_closelog(struct pmc_owner *po); 249 void pmclog_process_dropnotify(struct pmc_owner *po); 250 void pmclog_process_map_in(struct pmc_owner *po, pid_t pid, 251 uintfptr_t start, const char *path); 252 void pmclog_process_map_out(struct pmc_owner *po, pid_t pid, 253 uintfptr_t start, uintfptr_t end); 254 void pmclog_process_pmcallocate(struct pmc *_pm); 255 void pmclog_process_pmcattach(struct pmc *_pm, pid_t _pid, char *_path); 256 void pmclog_process_pmcdetach(struct pmc *_pm, pid_t _pid); 257 void pmclog_process_proccsw(struct pmc *_pm, struct pmc_process *_pp, 258 pmc_value_t _v); 259 void pmclog_process_procexec(struct pmc_owner *_po, pmc_id_t _pmid, pid_t _pid, 260 uintfptr_t _startaddr, char *_path); 261 void pmclog_process_procexit(struct pmc *_pm, struct pmc_process *_pp); 262 void pmclog_process_procfork(struct pmc_owner *_po, pid_t _oldpid, pid_t _newpid); 263 void pmclog_process_sysexit(struct pmc_owner *_po, pid_t _pid); 264 int pmclog_process_userlog(struct pmc_owner *_po, 265 struct pmc_op_writelog *_wl); 266 void pmclog_shutdown(void); 267 #endif /* _KERNEL */ 268 269 #endif /* _SYS_PMCLOG_H_ */ 270