Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1 | /* |
| 2 | * probe-event.c : perf-probe definition to kprobe_events format converter |
| 3 | * |
| 4 | * Written by Masami Hiramatsu <mhiramat@redhat.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #define _GNU_SOURCE |
| 23 | #include <sys/utsname.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/stat.h> |
| 26 | #include <fcntl.h> |
| 27 | #include <errno.h> |
| 28 | #include <stdio.h> |
| 29 | #include <unistd.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 32 | #include <stdarg.h> |
| 33 | #include <limits.h> |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 34 | |
| 35 | #undef _GNU_SOURCE |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 36 | #include "util.h" |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 37 | #include "event.h" |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 38 | #include "string.h" |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 39 | #include "strlist.h" |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 40 | #include "debug.h" |
Masami Hiramatsu | 7204133 | 2010-01-05 17:47:10 -0500 | [diff] [blame] | 41 | #include "cache.h" |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 42 | #include "color.h" |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 43 | #include "symbol.h" |
| 44 | #include "thread.h" |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 45 | #include "parse-events.h" /* For debugfs_path */ |
| 46 | #include "probe-event.h" |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 47 | #include "probe-finder.h" |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 48 | |
| 49 | #define MAX_CMDLEN 256 |
| 50 | #define MAX_PROBE_ARGS 128 |
| 51 | #define PERFPROBE_GROUP "probe" |
| 52 | |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 53 | bool probe_event_dry_run; /* Dry run flag */ |
| 54 | |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 55 | #define semantic_error(msg ...) die("Semantic error :" msg) |
| 56 | |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 57 | /* If there is no space to write, returns -E2BIG. */ |
| 58 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
Masami Hiramatsu | 8498845 | 2009-12-07 12:00:53 -0500 | [diff] [blame] | 59 | __attribute__((format(printf, 3, 4))); |
| 60 | |
| 61 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 62 | { |
| 63 | int ret; |
| 64 | va_list ap; |
| 65 | va_start(ap, format); |
| 66 | ret = vsnprintf(str, size, format, ap); |
| 67 | va_end(ap); |
| 68 | if (ret >= (int)size) |
| 69 | ret = -E2BIG; |
| 70 | return ret; |
| 71 | } |
| 72 | |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 73 | static struct map_groups kmap_groups; |
| 74 | static struct map *kmaps[MAP__NR_TYPES]; |
| 75 | |
| 76 | /* Initialize symbol maps for vmlinux */ |
| 77 | static void init_vmlinux(void) |
| 78 | { |
| 79 | symbol_conf.sort_by_name = true; |
| 80 | if (symbol_conf.vmlinux_name == NULL) |
| 81 | symbol_conf.try_vmlinux_path = true; |
| 82 | else |
| 83 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); |
| 84 | if (symbol__init() < 0) |
| 85 | die("Failed to init symbol map."); |
| 86 | |
| 87 | map_groups__init(&kmap_groups); |
| 88 | if (map_groups__create_kernel_maps(&kmap_groups, kmaps) < 0) |
| 89 | die("Failed to create kernel maps."); |
| 90 | } |
| 91 | |
| 92 | #ifndef NO_DWARF_SUPPORT |
| 93 | static int open_vmlinux(void) |
| 94 | { |
| 95 | if (map__load(kmaps[MAP__FUNCTION], NULL) < 0) { |
| 96 | pr_debug("Failed to load kernel map.\n"); |
| 97 | return -EINVAL; |
| 98 | } |
| 99 | pr_debug("Try to open %s\n", kmaps[MAP__FUNCTION]->dso->long_name); |
| 100 | return open(kmaps[MAP__FUNCTION]->dso->long_name, O_RDONLY); |
| 101 | } |
| 102 | #endif |
| 103 | |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 104 | void parse_line_range_desc(const char *arg, struct line_range *lr) |
| 105 | { |
| 106 | const char *ptr; |
| 107 | char *tmp; |
| 108 | /* |
| 109 | * <Syntax> |
| 110 | * SRC:SLN[+NUM|-ELN] |
| 111 | * FUNC[:SLN[+NUM|-ELN]] |
| 112 | */ |
| 113 | ptr = strchr(arg, ':'); |
| 114 | if (ptr) { |
| 115 | lr->start = (unsigned int)strtoul(ptr + 1, &tmp, 0); |
| 116 | if (*tmp == '+') |
| 117 | lr->end = lr->start + (unsigned int)strtoul(tmp + 1, |
| 118 | &tmp, 0); |
| 119 | else if (*tmp == '-') |
| 120 | lr->end = (unsigned int)strtoul(tmp + 1, &tmp, 0); |
| 121 | else |
| 122 | lr->end = 0; |
| 123 | pr_debug("Line range is %u to %u\n", lr->start, lr->end); |
| 124 | if (lr->end && lr->start > lr->end) |
| 125 | semantic_error("Start line must be smaller" |
| 126 | " than end line."); |
| 127 | if (*tmp != '\0') |
| 128 | semantic_error("Tailing with invalid character '%d'.", |
| 129 | *tmp); |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 130 | tmp = xstrndup(arg, (ptr - arg)); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 131 | } else |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 132 | tmp = xstrdup(arg); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 133 | |
| 134 | if (strchr(tmp, '.')) |
| 135 | lr->file = tmp; |
| 136 | else |
| 137 | lr->function = tmp; |
| 138 | } |
| 139 | |
Masami Hiramatsu | b7702a2 | 2009-12-16 17:24:15 -0500 | [diff] [blame] | 140 | /* Check the name is good for event/group */ |
| 141 | static bool check_event_name(const char *name) |
| 142 | { |
| 143 | if (!isalpha(*name) && *name != '_') |
| 144 | return false; |
| 145 | while (*++name != '\0') { |
| 146 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') |
| 147 | return false; |
| 148 | } |
| 149 | return true; |
| 150 | } |
| 151 | |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 152 | /* Parse probepoint definition. */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 153 | static void parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 154 | { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 155 | struct perf_probe_point *pp = &pev->point; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 156 | char *ptr, *tmp; |
| 157 | char c, nc = 0; |
| 158 | /* |
| 159 | * <Syntax> |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 160 | * perf probe [EVENT=]SRC[:LN|;PTN] |
| 161 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] |
Masami Hiramatsu | af663d7 | 2009-12-15 10:32:18 -0500 | [diff] [blame] | 162 | * |
| 163 | * TODO:Group name support |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 164 | */ |
| 165 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 166 | ptr = strpbrk(arg, ";=@+%"); |
| 167 | if (ptr && *ptr == '=') { /* Event name */ |
Masami Hiramatsu | af663d7 | 2009-12-15 10:32:18 -0500 | [diff] [blame] | 168 | *ptr = '\0'; |
| 169 | tmp = ptr + 1; |
| 170 | ptr = strchr(arg, ':'); |
| 171 | if (ptr) /* Group name is not supported yet. */ |
| 172 | semantic_error("Group name is not supported yet."); |
Masami Hiramatsu | b7702a2 | 2009-12-16 17:24:15 -0500 | [diff] [blame] | 173 | if (!check_event_name(arg)) |
| 174 | semantic_error("%s is bad for event name -it must " |
| 175 | "follow C symbol-naming rule.", arg); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 176 | pev->event = xstrdup(arg); |
| 177 | pev->group = NULL; |
Masami Hiramatsu | af663d7 | 2009-12-15 10:32:18 -0500 | [diff] [blame] | 178 | arg = tmp; |
| 179 | } |
| 180 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 181 | ptr = strpbrk(arg, ";:+@%"); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 182 | if (ptr) { |
| 183 | nc = *ptr; |
| 184 | *ptr++ = '\0'; |
| 185 | } |
| 186 | |
| 187 | /* Check arg is function or file and copy it */ |
| 188 | if (strchr(arg, '.')) /* File */ |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 189 | pp->file = xstrdup(arg); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 190 | else /* Function */ |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 191 | pp->function = xstrdup(arg); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 192 | |
| 193 | /* Parse other options */ |
| 194 | while (ptr) { |
| 195 | arg = ptr; |
| 196 | c = nc; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 197 | if (c == ';') { /* Lazy pattern must be the last part */ |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 198 | pp->lazy_line = xstrdup(arg); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 199 | break; |
| 200 | } |
| 201 | ptr = strpbrk(arg, ";:+@%"); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 202 | if (ptr) { |
| 203 | nc = *ptr; |
| 204 | *ptr++ = '\0'; |
| 205 | } |
| 206 | switch (c) { |
| 207 | case ':': /* Line number */ |
| 208 | pp->line = strtoul(arg, &tmp, 0); |
| 209 | if (*tmp != '\0') |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 210 | semantic_error("There is non-digit char" |
| 211 | " in line number."); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 212 | break; |
| 213 | case '+': /* Byte offset from a symbol */ |
| 214 | pp->offset = strtoul(arg, &tmp, 0); |
| 215 | if (*tmp != '\0') |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 216 | semantic_error("There is non-digit character" |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 217 | " in offset."); |
| 218 | break; |
| 219 | case '@': /* File name */ |
| 220 | if (pp->file) |
| 221 | semantic_error("SRC@SRC is not allowed."); |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 222 | pp->file = xstrdup(arg); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 223 | break; |
| 224 | case '%': /* Probe places */ |
| 225 | if (strcmp(arg, "return") == 0) { |
| 226 | pp->retprobe = 1; |
| 227 | } else /* Others not supported yet */ |
| 228 | semantic_error("%%%s is not supported.", arg); |
| 229 | break; |
| 230 | default: |
| 231 | DIE_IF("Program has a bug."); |
| 232 | break; |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | /* Exclusion check */ |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 237 | if (pp->lazy_line && pp->line) |
| 238 | semantic_error("Lazy pattern can't be used with line number."); |
| 239 | |
| 240 | if (pp->lazy_line && pp->offset) |
| 241 | semantic_error("Lazy pattern can't be used with offset."); |
| 242 | |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 243 | if (pp->line && pp->offset) |
| 244 | semantic_error("Offset can't be used with line number."); |
| 245 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 246 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) |
| 247 | semantic_error("File always requires line number or " |
| 248 | "lazy pattern."); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 249 | |
| 250 | if (pp->offset && !pp->function) |
| 251 | semantic_error("Offset requires an entry function."); |
| 252 | |
| 253 | if (pp->retprobe && !pp->function) |
| 254 | semantic_error("Return probe requires an entry function."); |
| 255 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 256 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) |
| 257 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
| 258 | "return probe."); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 259 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 260 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 261 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
| 262 | pp->lazy_line); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 263 | } |
| 264 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 265 | /* Parse perf-probe event command */ |
| 266 | void parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 267 | { |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 268 | char **argv; |
Masami Hiramatsu | fac13fd | 2009-12-15 10:31:14 -0500 | [diff] [blame] | 269 | int argc, i; |
| 270 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 271 | argv = argv_split(cmd, &argc); |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 272 | if (!argv) |
| 273 | die("argv_split failed."); |
| 274 | if (argc > MAX_PROBE_ARGS + 1) |
| 275 | semantic_error("Too many arguments"); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 276 | |
| 277 | /* Parse probe point */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 278 | parse_perf_probe_point(argv[0], pev); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 279 | |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 280 | /* Copy arguments and ensure return probe has no C argument */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 281 | pev->nargs = argc - 1; |
| 282 | pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
| 283 | for (i = 0; i < pev->nargs; i++) { |
| 284 | pev->args[i].name = xstrdup(argv[i + 1]); |
| 285 | if (is_c_varname(pev->args[i].name) && pev->point.retprobe) |
| 286 | semantic_error("You can't specify local variable for" |
| 287 | " kretprobe"); |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 288 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 289 | |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 290 | argv_free(argv); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 291 | } |
| 292 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 293 | /* Return true if this perf_probe_event requires debuginfo */ |
| 294 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 295 | { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 296 | int i; |
| 297 | |
| 298 | if (pev->point.file || pev->point.line || pev->point.lazy_line) |
| 299 | return true; |
| 300 | |
| 301 | for (i = 0; i < pev->nargs; i++) |
| 302 | if (is_c_varname(pev->args[i].name)) |
| 303 | return true; |
| 304 | |
| 305 | return false; |
| 306 | } |
| 307 | |
| 308 | /* Parse kprobe_events event into struct probe_point */ |
| 309 | void parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev) |
| 310 | { |
| 311 | struct kprobe_trace_point *tp = &tev->point; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 312 | char pr; |
| 313 | char *p; |
| 314 | int ret, i, argc; |
| 315 | char **argv; |
| 316 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 317 | pr_debug("Parsing kprobe_events: %s\n", cmd); |
| 318 | argv = argv_split(cmd, &argc); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 319 | if (!argv) |
| 320 | die("argv_split failed."); |
| 321 | if (argc < 2) |
| 322 | semantic_error("Too less arguments."); |
| 323 | |
| 324 | /* Scan event and group name. */ |
Liming Wang | 93aaa45 | 2009-12-02 16:42:54 +0800 | [diff] [blame] | 325 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 326 | &pr, (float *)(void *)&tev->group, |
| 327 | (float *)(void *)&tev->event); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 328 | if (ret != 3) |
| 329 | semantic_error("Failed to parse event name: %s", argv[0]); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 330 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 331 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 332 | tp->retprobe = (pr == 'r'); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 333 | |
| 334 | /* Scan function name and offset */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 335 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
| 336 | &tp->offset); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 337 | if (ret == 1) |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 338 | tp->offset = 0; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 339 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 340 | tev->nargs = argc - 2; |
| 341 | tev->args = xzalloc(sizeof(struct kprobe_trace_arg) * tev->nargs); |
| 342 | for (i = 0; i < tev->nargs; i++) { |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 343 | p = strchr(argv[i + 2], '='); |
| 344 | if (p) /* We don't need which register is assigned. */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 345 | *p++ = '\0'; |
| 346 | else |
| 347 | p = argv[i + 2]; |
| 348 | tev->args[i].name = xstrdup(argv[i + 2]); |
| 349 | /* TODO: parse regs and offset */ |
| 350 | tev->args[i].value = xstrdup(p); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 351 | } |
| 352 | |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 353 | argv_free(argv); |
| 354 | } |
| 355 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 356 | /* Compose only probe point (not argument) */ |
| 357 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 358 | { |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 359 | char *buf, *tmp; |
| 360 | char offs[32] = "", line[32] = "", file[32] = ""; |
| 361 | int ret, len; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 362 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 363 | buf = xzalloc(MAX_CMDLEN); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 364 | if (pp->offset) { |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 365 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 366 | if (ret <= 0) |
| 367 | goto error; |
| 368 | } |
| 369 | if (pp->line) { |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 370 | ret = e_snprintf(line, 32, ":%d", pp->line); |
| 371 | if (ret <= 0) |
| 372 | goto error; |
| 373 | } |
| 374 | if (pp->file) { |
| 375 | len = strlen(pp->file) - 32; |
| 376 | if (len < 0) |
| 377 | len = 0; |
| 378 | tmp = strchr(pp->file + len, '/'); |
| 379 | if (!tmp) |
| 380 | tmp = pp->file + len - 1; |
| 381 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 382 | if (ret <= 0) |
| 383 | goto error; |
| 384 | } |
| 385 | |
| 386 | if (pp->function) |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 387 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
| 388 | offs, pp->retprobe ? "%return" : "", line, |
| 389 | file); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 390 | else |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 391 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 392 | if (ret <= 0) |
| 393 | goto error; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 394 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 395 | return buf; |
| 396 | error: |
| 397 | die("Failed to synthesize perf probe point: %s", strerror(-ret)); |
| 398 | } |
| 399 | |
| 400 | #if 0 |
| 401 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) |
| 402 | { |
| 403 | char *buf; |
| 404 | int i, len, ret; |
| 405 | |
| 406 | buf = synthesize_perf_probe_point(&pev->point); |
| 407 | if (!buf) |
| 408 | return NULL; |
| 409 | |
| 410 | len = strlen(buf); |
| 411 | for (i = 0; i < pev->nargs; i++) { |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 412 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 413 | pev->args[i].name); |
| 414 | if (ret <= 0) { |
| 415 | free(buf); |
| 416 | return NULL; |
| 417 | } |
| 418 | len += ret; |
| 419 | } |
| 420 | |
| 421 | return buf; |
| 422 | } |
| 423 | #endif |
| 424 | |
| 425 | static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref, |
| 426 | char **buf, size_t *buflen, |
| 427 | int depth) |
| 428 | { |
| 429 | int ret; |
| 430 | if (ref->next) { |
| 431 | depth = __synthesize_kprobe_trace_arg_ref(ref->next, buf, |
| 432 | buflen, depth + 1); |
| 433 | if (depth < 0) |
| 434 | goto out; |
| 435 | } |
| 436 | |
| 437 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); |
| 438 | if (ret < 0) |
| 439 | depth = ret; |
| 440 | else { |
| 441 | *buf += ret; |
| 442 | *buflen -= ret; |
| 443 | } |
| 444 | out: |
| 445 | return depth; |
| 446 | |
| 447 | } |
| 448 | |
| 449 | static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, |
| 450 | char *buf, size_t buflen) |
| 451 | { |
| 452 | int ret, depth = 0; |
| 453 | char *tmp = buf; |
| 454 | |
| 455 | /* Argument name or separator */ |
| 456 | if (arg->name) |
| 457 | ret = e_snprintf(buf, buflen, " %s=", arg->name); |
| 458 | else |
| 459 | ret = e_snprintf(buf, buflen, " "); |
| 460 | if (ret < 0) |
| 461 | return ret; |
| 462 | buf += ret; |
| 463 | buflen -= ret; |
| 464 | |
| 465 | /* Dereferencing arguments */ |
| 466 | if (arg->ref) { |
| 467 | depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf, |
| 468 | &buflen, 1); |
| 469 | if (depth < 0) |
| 470 | return depth; |
| 471 | } |
| 472 | |
| 473 | /* Print argument value */ |
| 474 | ret = e_snprintf(buf, buflen, "%s", arg->value); |
| 475 | if (ret < 0) |
| 476 | return ret; |
| 477 | buf += ret; |
| 478 | buflen -= ret; |
| 479 | |
| 480 | /* Closing */ |
| 481 | while (depth--) { |
| 482 | ret = e_snprintf(buf, buflen, ")"); |
| 483 | if (ret < 0) |
| 484 | return ret; |
| 485 | buf += ret; |
| 486 | buflen -= ret; |
| 487 | } |
| 488 | |
| 489 | return buf - tmp; |
| 490 | } |
| 491 | |
| 492 | char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev) |
| 493 | { |
| 494 | struct kprobe_trace_point *tp = &tev->point; |
| 495 | char *buf; |
| 496 | int i, len, ret; |
| 497 | |
| 498 | buf = xzalloc(MAX_CMDLEN); |
| 499 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
| 500 | tp->retprobe ? 'r' : 'p', |
| 501 | tev->group, tev->event, |
| 502 | tp->symbol, tp->offset); |
| 503 | if (len <= 0) |
| 504 | goto error; |
| 505 | |
| 506 | for (i = 0; i < tev->nargs; i++) { |
| 507 | ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len, |
| 508 | MAX_CMDLEN - len); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 509 | if (ret <= 0) |
| 510 | goto error; |
| 511 | len += ret; |
| 512 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 513 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 514 | return buf; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 515 | error: |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 516 | free(buf); |
| 517 | return NULL; |
| 518 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 519 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 520 | void convert_to_perf_probe_event(struct kprobe_trace_event *tev, |
| 521 | struct perf_probe_event *pev) |
| 522 | { |
| 523 | char buf[64]; |
| 524 | int i; |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 525 | #ifndef NO_DWARF_SUPPORT |
| 526 | struct symbol *sym; |
| 527 | int fd, ret = 0; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 528 | |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 529 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], |
| 530 | tev->point.symbol, NULL); |
| 531 | if (sym) { |
| 532 | fd = open_vmlinux(); |
| 533 | ret = find_perf_probe_point(fd, sym->start + tev->point.offset, |
| 534 | &pev->point); |
| 535 | close(fd); |
| 536 | } |
| 537 | if (ret <= 0) { |
| 538 | pev->point.function = xstrdup(tev->point.symbol); |
| 539 | pev->point.offset = tev->point.offset; |
| 540 | } |
| 541 | #else |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 542 | /* Convert trace_point to probe_point */ |
| 543 | pev->point.function = xstrdup(tev->point.symbol); |
| 544 | pev->point.offset = tev->point.offset; |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 545 | #endif |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 546 | pev->point.retprobe = tev->point.retprobe; |
| 547 | |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 548 | pev->event = xstrdup(tev->event); |
| 549 | pev->group = xstrdup(tev->group); |
| 550 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 551 | /* Convert trace_arg to probe_arg */ |
| 552 | pev->nargs = tev->nargs; |
| 553 | pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
| 554 | for (i = 0; i < tev->nargs; i++) |
| 555 | if (tev->args[i].name) |
| 556 | pev->args[i].name = xstrdup(tev->args[i].name); |
| 557 | else { |
| 558 | synthesize_kprobe_trace_arg(&tev->args[i], buf, 64); |
| 559 | pev->args[i].name = xstrdup(buf); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | void clear_perf_probe_event(struct perf_probe_event *pev) |
| 564 | { |
| 565 | struct perf_probe_point *pp = &pev->point; |
| 566 | int i; |
| 567 | |
| 568 | if (pev->event) |
| 569 | free(pev->event); |
| 570 | if (pev->group) |
| 571 | free(pev->group); |
| 572 | if (pp->file) |
| 573 | free(pp->file); |
| 574 | if (pp->function) |
| 575 | free(pp->function); |
| 576 | if (pp->lazy_line) |
| 577 | free(pp->lazy_line); |
| 578 | for (i = 0; i < pev->nargs; i++) |
| 579 | if (pev->args[i].name) |
| 580 | free(pev->args[i].name); |
| 581 | if (pev->args) |
| 582 | free(pev->args); |
| 583 | memset(pev, 0, sizeof(*pev)); |
| 584 | } |
| 585 | |
| 586 | void clear_kprobe_trace_event(struct kprobe_trace_event *tev) |
| 587 | { |
| 588 | struct kprobe_trace_arg_ref *ref, *next; |
| 589 | int i; |
| 590 | |
| 591 | if (tev->event) |
| 592 | free(tev->event); |
| 593 | if (tev->group) |
| 594 | free(tev->group); |
| 595 | if (tev->point.symbol) |
| 596 | free(tev->point.symbol); |
| 597 | for (i = 0; i < tev->nargs; i++) { |
| 598 | if (tev->args[i].name) |
| 599 | free(tev->args[i].name); |
| 600 | if (tev->args[i].value) |
| 601 | free(tev->args[i].value); |
| 602 | ref = tev->args[i].ref; |
| 603 | while (ref) { |
| 604 | next = ref->next; |
| 605 | free(ref); |
| 606 | ref = next; |
| 607 | } |
| 608 | } |
| 609 | if (tev->args) |
| 610 | free(tev->args); |
| 611 | memset(tev, 0, sizeof(*tev)); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 612 | } |
| 613 | |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 614 | static int open_kprobe_events(bool readwrite) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 615 | { |
| 616 | char buf[PATH_MAX]; |
| 617 | int ret; |
| 618 | |
| 619 | ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path); |
| 620 | if (ret < 0) |
| 621 | die("Failed to make kprobe_events path."); |
| 622 | |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 623 | if (readwrite && !probe_event_dry_run) |
| 624 | ret = open(buf, O_RDWR, O_APPEND); |
| 625 | else |
| 626 | ret = open(buf, O_RDONLY, 0); |
| 627 | |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 628 | if (ret < 0) { |
| 629 | if (errno == ENOENT) |
| 630 | die("kprobe_events file does not exist -" |
Liming Wang | 63bbd5e | 2009-12-29 16:37:09 +0800 | [diff] [blame] | 631 | " please rebuild with CONFIG_KPROBE_EVENT."); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 632 | else |
| 633 | die("Could not open kprobe_events file: %s", |
| 634 | strerror(errno)); |
| 635 | } |
| 636 | return ret; |
| 637 | } |
| 638 | |
| 639 | /* Get raw string list of current kprobe_events */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 640 | static struct strlist *get_kprobe_trace_command_rawlist(int fd) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 641 | { |
| 642 | int ret, idx; |
| 643 | FILE *fp; |
| 644 | char buf[MAX_CMDLEN]; |
| 645 | char *p; |
| 646 | struct strlist *sl; |
| 647 | |
| 648 | sl = strlist__new(true, NULL); |
| 649 | |
| 650 | fp = fdopen(dup(fd), "r"); |
| 651 | while (!feof(fp)) { |
| 652 | p = fgets(buf, MAX_CMDLEN, fp); |
| 653 | if (!p) |
| 654 | break; |
| 655 | |
| 656 | idx = strlen(p) - 1; |
| 657 | if (p[idx] == '\n') |
| 658 | p[idx] = '\0'; |
| 659 | ret = strlist__add(sl, buf); |
| 660 | if (ret < 0) |
| 661 | die("strlist__add failed: %s", strerror(-ret)); |
| 662 | } |
| 663 | fclose(fp); |
| 664 | |
| 665 | return sl; |
| 666 | } |
| 667 | |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 668 | /* Show an event */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 669 | static void show_perf_probe_event(struct perf_probe_event *pev) |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 670 | { |
Masami Hiramatsu | 7e990a5 | 2009-12-15 10:31:21 -0500 | [diff] [blame] | 671 | int i, ret; |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 672 | char buf[128]; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 673 | char *place; |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 674 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 675 | /* Synthesize only event probe point */ |
| 676 | place = synthesize_perf_probe_point(&pev->point); |
| 677 | |
| 678 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); |
Masami Hiramatsu | 7e990a5 | 2009-12-15 10:31:21 -0500 | [diff] [blame] | 679 | if (ret < 0) |
| 680 | die("Failed to copy event: %s", strerror(-ret)); |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 681 | printf(" %-20s (on %s", buf, place); |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 682 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 683 | if (pev->nargs > 0) { |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 684 | printf(" with"); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 685 | for (i = 0; i < pev->nargs; i++) |
| 686 | printf(" %s", pev->args[i].name); |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 687 | } |
| 688 | printf(")\n"); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 689 | free(place); |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 690 | } |
| 691 | |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 692 | /* List up current perf-probe events */ |
| 693 | void show_perf_probe_events(void) |
| 694 | { |
Masami Hiramatsu | 7ef17aa | 2009-12-15 10:32:47 -0500 | [diff] [blame] | 695 | int fd; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 696 | struct kprobe_trace_event tev; |
| 697 | struct perf_probe_event pev; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 698 | struct strlist *rawlist; |
| 699 | struct str_node *ent; |
| 700 | |
Masami Hiramatsu | 7204133 | 2010-01-05 17:47:10 -0500 | [diff] [blame] | 701 | setup_pager(); |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame^] | 702 | init_vmlinux(); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 703 | |
| 704 | memset(&tev, 0, sizeof(tev)); |
| 705 | memset(&pev, 0, sizeof(pev)); |
Masami Hiramatsu | 7204133 | 2010-01-05 17:47:10 -0500 | [diff] [blame] | 706 | |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 707 | fd = open_kprobe_events(false); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 708 | rawlist = get_kprobe_trace_command_rawlist(fd); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 709 | close(fd); |
| 710 | |
Masami Hiramatsu | adf365f | 2009-12-15 10:32:03 -0500 | [diff] [blame] | 711 | strlist__for_each(ent, rawlist) { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 712 | parse_kprobe_trace_command(ent->s, &tev); |
| 713 | convert_to_perf_probe_event(&tev, &pev); |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 714 | /* Show an event */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 715 | show_perf_probe_event(&pev); |
| 716 | clear_perf_probe_event(&pev); |
| 717 | clear_kprobe_trace_event(&tev); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | strlist__delete(rawlist); |
| 721 | } |
| 722 | |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 723 | /* Get current perf-probe event names */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 724 | static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group) |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 725 | { |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 726 | char buf[128]; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 727 | struct strlist *sl, *rawlist; |
| 728 | struct str_node *ent; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 729 | struct kprobe_trace_event tev; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 730 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 731 | memset(&tev, 0, sizeof(tev)); |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 732 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 733 | rawlist = get_kprobe_trace_command_rawlist(fd); |
Masami Hiramatsu | e1d2017 | 2009-12-07 12:00:46 -0500 | [diff] [blame] | 734 | sl = strlist__new(true, NULL); |
Masami Hiramatsu | adf365f | 2009-12-15 10:32:03 -0500 | [diff] [blame] | 735 | strlist__for_each(ent, rawlist) { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 736 | parse_kprobe_trace_command(ent->s, &tev); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 737 | if (include_group) { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 738 | if (e_snprintf(buf, 128, "%s:%s", tev.group, |
| 739 | tev.event) < 0) |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 740 | die("Failed to copy group:event name."); |
| 741 | strlist__add(sl, buf); |
| 742 | } else |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 743 | strlist__add(sl, tev.event); |
| 744 | clear_kprobe_trace_event(&tev); |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | strlist__delete(rawlist); |
| 748 | |
| 749 | return sl; |
| 750 | } |
| 751 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 752 | static void write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 753 | { |
| 754 | int ret; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 755 | char *buf = synthesize_kprobe_trace_command(tev); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 756 | |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 757 | pr_debug("Writing event: %s\n", buf); |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 758 | if (!probe_event_dry_run) { |
| 759 | ret = write(fd, buf, strlen(buf)); |
| 760 | if (ret <= 0) |
| 761 | die("Failed to write event: %s", strerror(errno)); |
| 762 | } |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 763 | free(buf); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 764 | } |
| 765 | |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 766 | static void get_new_event_name(char *buf, size_t len, const char *base, |
Masami Hiramatsu | d761b08 | 2009-12-15 10:32:25 -0500 | [diff] [blame] | 767 | struct strlist *namelist, bool allow_suffix) |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 768 | { |
| 769 | int i, ret; |
Masami Hiramatsu | 17f88fc | 2009-12-08 17:03:02 -0500 | [diff] [blame] | 770 | |
| 771 | /* Try no suffix */ |
| 772 | ret = e_snprintf(buf, len, "%s", base); |
| 773 | if (ret < 0) |
| 774 | die("snprintf() failed: %s", strerror(-ret)); |
| 775 | if (!strlist__has_entry(namelist, buf)) |
| 776 | return; |
| 777 | |
Masami Hiramatsu | d761b08 | 2009-12-15 10:32:25 -0500 | [diff] [blame] | 778 | if (!allow_suffix) { |
| 779 | pr_warning("Error: event \"%s\" already exists. " |
| 780 | "(Use -f to force duplicates.)\n", base); |
| 781 | die("Can't add new event."); |
| 782 | } |
| 783 | |
Masami Hiramatsu | 17f88fc | 2009-12-08 17:03:02 -0500 | [diff] [blame] | 784 | /* Try to add suffix */ |
| 785 | for (i = 1; i < MAX_EVENT_INDEX; i++) { |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 786 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
| 787 | if (ret < 0) |
| 788 | die("snprintf() failed: %s", strerror(-ret)); |
| 789 | if (!strlist__has_entry(namelist, buf)) |
| 790 | break; |
| 791 | } |
| 792 | if (i == MAX_EVENT_INDEX) |
| 793 | die("Too many events are on the same function."); |
| 794 | } |
| 795 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 796 | static void __add_kprobe_trace_events(struct perf_probe_event *pev, |
| 797 | struct kprobe_trace_event *tevs, |
| 798 | int ntevs, bool allow_suffix) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 799 | { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 800 | int i, fd; |
| 801 | struct kprobe_trace_event *tev; |
| 802 | char buf[64]; |
| 803 | const char *event, *group; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 804 | struct strlist *namelist; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 805 | |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 806 | fd = open_kprobe_events(true); |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 807 | /* Get current event names */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 808 | namelist = get_kprobe_trace_event_names(fd, false); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 809 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 810 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
| 811 | for (i = 0; i < ntevs; i++) { |
| 812 | tev = &tevs[i]; |
| 813 | if (pev->event) |
| 814 | event = pev->event; |
| 815 | else |
| 816 | if (pev->point.function) |
| 817 | event = pev->point.function; |
| 818 | else |
| 819 | event = tev->point.symbol; |
| 820 | if (pev->group) |
| 821 | group = pev->group; |
| 822 | else |
| 823 | group = PERFPROBE_GROUP; |
| 824 | |
| 825 | /* Get an unused new event name */ |
| 826 | get_new_event_name(buf, 64, event, namelist, allow_suffix); |
| 827 | event = buf; |
| 828 | |
| 829 | tev->event = xstrdup(event); |
| 830 | tev->group = xstrdup(group); |
| 831 | write_kprobe_trace_event(fd, tev); |
| 832 | /* Add added event name to namelist */ |
| 833 | strlist__add(namelist, event); |
| 834 | |
| 835 | /* Trick here - save current event/group */ |
| 836 | event = pev->event; |
| 837 | group = pev->group; |
| 838 | pev->event = tev->event; |
| 839 | pev->group = tev->group; |
| 840 | show_perf_probe_event(pev); |
| 841 | /* Trick here - restore current event/group */ |
| 842 | pev->event = (char *)event; |
| 843 | pev->group = (char *)group; |
| 844 | |
| 845 | /* |
| 846 | * Probes after the first probe which comes from same |
| 847 | * user input are always allowed to add suffix, because |
| 848 | * there might be several addresses corresponding to |
| 849 | * one code line. |
| 850 | */ |
| 851 | allow_suffix = true; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 852 | } |
Masami Hiramatsu | a9b495b | 2009-12-08 17:02:47 -0500 | [diff] [blame] | 853 | /* Show how to use the event. */ |
| 854 | printf("\nYou can now use it on all perf tools, such as:\n\n"); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 855 | printf("\tperf record -e %s:%s -a sleep 1\n\n", tev->group, tev->event); |
Masami Hiramatsu | a9b495b | 2009-12-08 17:02:47 -0500 | [diff] [blame] | 856 | |
Masami Hiramatsu | e1d2017 | 2009-12-07 12:00:46 -0500 | [diff] [blame] | 857 | strlist__delete(namelist); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 858 | close(fd); |
| 859 | } |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 860 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 861 | static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, |
| 862 | struct kprobe_trace_event **tevs) |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 863 | { |
| 864 | struct symbol *sym; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 865 | bool need_dwarf; |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 866 | #ifndef NO_DWARF_SUPPORT |
| 867 | int fd; |
| 868 | #endif |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 869 | int ntevs = 0, i; |
| 870 | struct kprobe_trace_event *tev; |
| 871 | |
| 872 | need_dwarf = perf_probe_event_need_dwarf(pev); |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 873 | |
| 874 | if (need_dwarf) |
| 875 | #ifdef NO_DWARF_SUPPORT |
| 876 | die("Debuginfo-analysis is not supported"); |
| 877 | #else /* !NO_DWARF_SUPPORT */ |
| 878 | pr_debug("Some probes require debuginfo.\n"); |
| 879 | |
| 880 | fd = open_vmlinux(); |
| 881 | if (fd < 0) { |
| 882 | if (need_dwarf) |
| 883 | die("Could not open debuginfo file."); |
| 884 | |
| 885 | pr_debug("Could not open vmlinux/module file." |
| 886 | " Try to use symbols.\n"); |
| 887 | goto end_dwarf; |
| 888 | } |
| 889 | |
| 890 | /* Searching probe points */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 891 | ntevs = find_kprobe_trace_events(fd, pev, tevs); |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 892 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 893 | if (ntevs > 0) /* Found */ |
| 894 | goto found; |
| 895 | |
| 896 | if (ntevs == 0) /* No error but failed to find probe point. */ |
| 897 | die("Probe point '%s' not found. - probe not added.", |
| 898 | synthesize_perf_probe_point(&pev->point)); |
| 899 | |
| 900 | /* Error path */ |
| 901 | if (need_dwarf) { |
| 902 | if (ntevs == -ENOENT) |
| 903 | pr_warning("No dwarf info found in the vmlinux - please rebuild with CONFIG_DEBUG_INFO=y.\n"); |
| 904 | die("Could not analyze debuginfo."); |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 905 | } |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 906 | pr_debug("An error occurred in debuginfo analysis." |
| 907 | " Try to use symbols.\n"); |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 908 | |
| 909 | end_dwarf: |
| 910 | #endif /* !NO_DWARF_SUPPORT */ |
| 911 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 912 | /* Allocate trace event buffer */ |
| 913 | ntevs = 1; |
| 914 | tev = *tevs = xzalloc(sizeof(struct kprobe_trace_event)); |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 915 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 916 | /* Copy parameters */ |
| 917 | tev->point.symbol = xstrdup(pev->point.function); |
| 918 | tev->point.offset = pev->point.offset; |
| 919 | tev->nargs = pev->nargs; |
| 920 | if (tev->nargs) { |
| 921 | tev->args = xzalloc(sizeof(struct kprobe_trace_arg) |
| 922 | * tev->nargs); |
| 923 | for (i = 0; i < tev->nargs; i++) |
| 924 | tev->args[i].value = xstrdup(pev->args[i].name); |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 925 | } |
| 926 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 927 | /* Currently just checking function name from symbol map */ |
| 928 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], |
| 929 | tev->point.symbol, NULL); |
| 930 | if (!sym) |
| 931 | die("Kernel symbol \'%s\' not found - probe not added.", |
| 932 | tev->point.symbol); |
| 933 | found: |
| 934 | close(fd); |
| 935 | return ntevs; |
| 936 | } |
| 937 | |
| 938 | struct __event_package { |
| 939 | struct perf_probe_event *pev; |
| 940 | struct kprobe_trace_event *tevs; |
| 941 | int ntevs; |
| 942 | }; |
| 943 | |
| 944 | void add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
| 945 | bool force_add) |
| 946 | { |
| 947 | int i; |
| 948 | struct __event_package *pkgs; |
| 949 | |
| 950 | pkgs = xzalloc(sizeof(struct __event_package) * npevs); |
| 951 | |
| 952 | /* Init vmlinux path */ |
| 953 | init_vmlinux(); |
| 954 | |
| 955 | /* Loop 1: convert all events */ |
| 956 | for (i = 0; i < npevs; i++) { |
| 957 | pkgs[i].pev = &pevs[i]; |
| 958 | /* Convert with or without debuginfo */ |
| 959 | pkgs[i].ntevs = convert_to_kprobe_trace_events(pkgs[i].pev, |
| 960 | &pkgs[i].tevs); |
| 961 | } |
| 962 | |
| 963 | /* Loop 2: add all events */ |
| 964 | for (i = 0; i < npevs; i++) |
| 965 | __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
| 966 | pkgs[i].ntevs, force_add); |
| 967 | /* TODO: cleanup all trace events? */ |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 968 | } |
| 969 | |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 970 | static void __del_trace_kprobe_event(int fd, struct str_node *ent) |
| 971 | { |
| 972 | char *p; |
| 973 | char buf[128]; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 974 | int ret; |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 975 | |
| 976 | /* Convert from perf-probe event to trace-kprobe event */ |
| 977 | if (e_snprintf(buf, 128, "-:%s", ent->s) < 0) |
| 978 | die("Failed to copy event."); |
| 979 | p = strchr(buf + 2, ':'); |
| 980 | if (!p) |
| 981 | die("Internal error: %s should have ':' but not.", ent->s); |
| 982 | *p = '/'; |
| 983 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 984 | pr_debug("Writing event: %s\n", buf); |
| 985 | ret = write(fd, buf, strlen(buf)); |
| 986 | if (ret <= 0) |
| 987 | die("Failed to write event: %s", strerror(errno)); |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 988 | printf("Remove event: %s\n", ent->s); |
| 989 | } |
| 990 | |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 991 | static void del_trace_kprobe_event(int fd, const char *group, |
| 992 | const char *event, struct strlist *namelist) |
| 993 | { |
| 994 | char buf[128]; |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 995 | struct str_node *ent, *n; |
| 996 | int found = 0; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 997 | |
| 998 | if (e_snprintf(buf, 128, "%s:%s", group, event) < 0) |
| 999 | die("Failed to copy event."); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1000 | |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 1001 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
| 1002 | strlist__for_each_safe(ent, n, namelist) |
| 1003 | if (strglobmatch(ent->s, buf)) { |
| 1004 | found++; |
| 1005 | __del_trace_kprobe_event(fd, ent); |
| 1006 | strlist__remove(namelist, ent); |
| 1007 | } |
| 1008 | } else { |
| 1009 | ent = strlist__find(namelist, buf); |
| 1010 | if (ent) { |
| 1011 | found++; |
| 1012 | __del_trace_kprobe_event(fd, ent); |
| 1013 | strlist__remove(namelist, ent); |
| 1014 | } |
| 1015 | } |
| 1016 | if (found == 0) |
| 1017 | pr_info("Info: event \"%s\" does not exist, could not remove it.\n", buf); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1018 | } |
| 1019 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1020 | void del_perf_probe_events(struct strlist *dellist) |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1021 | { |
| 1022 | int fd; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1023 | const char *group, *event; |
| 1024 | char *p, *str; |
| 1025 | struct str_node *ent; |
| 1026 | struct strlist *namelist; |
| 1027 | |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 1028 | fd = open_kprobe_events(true); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1029 | /* Get current event names */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1030 | namelist = get_kprobe_trace_event_names(fd, true); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1031 | |
Masami Hiramatsu | adf365f | 2009-12-15 10:32:03 -0500 | [diff] [blame] | 1032 | strlist__for_each(ent, dellist) { |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 1033 | str = xstrdup(ent->s); |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 1034 | pr_debug("Parsing: %s\n", str); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1035 | p = strchr(str, ':'); |
| 1036 | if (p) { |
| 1037 | group = str; |
| 1038 | *p = '\0'; |
| 1039 | event = p + 1; |
| 1040 | } else { |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 1041 | group = "*"; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1042 | event = str; |
| 1043 | } |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 1044 | pr_debug("Group: %s, Event: %s\n", group, event); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1045 | del_trace_kprobe_event(fd, group, event, namelist); |
| 1046 | free(str); |
| 1047 | } |
| 1048 | strlist__delete(namelist); |
| 1049 | close(fd); |
| 1050 | } |
| 1051 | |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1052 | #define LINEBUF_SIZE 256 |
Masami Hiramatsu | 5c8d1cb | 2010-02-25 08:36:04 -0500 | [diff] [blame] | 1053 | #define NR_ADDITIONAL_LINES 2 |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1054 | |
| 1055 | static void show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num) |
| 1056 | { |
| 1057 | char buf[LINEBUF_SIZE]; |
| 1058 | const char *color = PERF_COLOR_BLUE; |
| 1059 | |
| 1060 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
| 1061 | goto error; |
| 1062 | if (!skip) { |
| 1063 | if (show_num) |
| 1064 | fprintf(stdout, "%7u %s", l, buf); |
| 1065 | else |
| 1066 | color_fprintf(stdout, color, " %s", buf); |
| 1067 | } |
| 1068 | |
| 1069 | while (strlen(buf) == LINEBUF_SIZE - 1 && |
| 1070 | buf[LINEBUF_SIZE - 2] != '\n') { |
| 1071 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
| 1072 | goto error; |
| 1073 | if (!skip) { |
| 1074 | if (show_num) |
| 1075 | fprintf(stdout, "%s", buf); |
| 1076 | else |
| 1077 | color_fprintf(stdout, color, "%s", buf); |
| 1078 | } |
| 1079 | } |
| 1080 | return; |
| 1081 | error: |
| 1082 | if (feof(fp)) |
| 1083 | die("Source file is shorter than expected."); |
| 1084 | else |
| 1085 | die("File read error: %s", strerror(errno)); |
| 1086 | } |
| 1087 | |
| 1088 | void show_line_range(struct line_range *lr) |
| 1089 | { |
| 1090 | unsigned int l = 1; |
| 1091 | struct line_node *ln; |
| 1092 | FILE *fp; |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 1093 | int fd, ret; |
| 1094 | |
| 1095 | /* Search a line range */ |
| 1096 | init_vmlinux(); |
| 1097 | fd = open_vmlinux(); |
| 1098 | if (fd < 0) |
| 1099 | die("Could not open debuginfo file."); |
| 1100 | ret = find_line_range(fd, lr); |
| 1101 | if (ret <= 0) |
| 1102 | die("Source line is not found.\n"); |
| 1103 | close(fd); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1104 | |
| 1105 | setup_pager(); |
| 1106 | |
| 1107 | if (lr->function) |
| 1108 | fprintf(stdout, "<%s:%d>\n", lr->function, |
| 1109 | lr->start - lr->offset); |
| 1110 | else |
| 1111 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); |
| 1112 | |
| 1113 | fp = fopen(lr->path, "r"); |
| 1114 | if (fp == NULL) |
| 1115 | die("Failed to open %s: %s", lr->path, strerror(errno)); |
| 1116 | /* Skip to starting line number */ |
| 1117 | while (l < lr->start) |
| 1118 | show_one_line(fp, l++, true, false); |
| 1119 | |
| 1120 | list_for_each_entry(ln, &lr->line_list, list) { |
| 1121 | while (ln->line > l) |
| 1122 | show_one_line(fp, (l++) - lr->offset, false, false); |
| 1123 | show_one_line(fp, (l++) - lr->offset, false, true); |
| 1124 | } |
Masami Hiramatsu | 5c8d1cb | 2010-02-25 08:36:04 -0500 | [diff] [blame] | 1125 | |
| 1126 | if (lr->end == INT_MAX) |
| 1127 | lr->end = l + NR_ADDITIONAL_LINES; |
| 1128 | while (l < lr->end && !feof(fp)) |
| 1129 | show_one_line(fp, (l++) - lr->offset, false, false); |
| 1130 | |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1131 | fclose(fp); |
| 1132 | } |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 1133 | |
| 1134 | |