Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1 | /* |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2 | * probe-event.c : perf-probe definition to probe_events format converter |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 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 | |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 22 | #include <sys/utsname.h> |
| 23 | #include <sys/types.h> |
| 24 | #include <sys/stat.h> |
| 25 | #include <fcntl.h> |
| 26 | #include <errno.h> |
| 27 | #include <stdio.h> |
| 28 | #include <unistd.h> |
| 29 | #include <stdlib.h> |
| 30 | #include <string.h> |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 31 | #include <stdarg.h> |
| 32 | #include <limits.h> |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 33 | #include <elf.h> |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 34 | |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 35 | #include "util.h" |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 36 | #include "event.h" |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 37 | #include "strlist.h" |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 38 | #include "debug.h" |
Masami Hiramatsu | 7204133 | 2010-01-05 17:47:10 -0500 | [diff] [blame] | 39 | #include "cache.h" |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 40 | #include "color.h" |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 41 | #include "symbol.h" |
| 42 | #include "thread.h" |
Borislav Petkov | 553873e | 2013-12-09 17:14:23 +0100 | [diff] [blame] | 43 | #include <api/fs/debugfs.h> |
Irina Tirdea | 1d037ca | 2012-09-11 01:15:03 +0300 | [diff] [blame] | 44 | #include "trace-event.h" /* For __maybe_unused */ |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 45 | #include "probe-event.h" |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 46 | #include "probe-finder.h" |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 47 | #include "session.h" |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 48 | |
| 49 | #define MAX_CMDLEN 256 |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 50 | #define PERFPROBE_GROUP "probe" |
| 51 | |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 52 | bool probe_event_dry_run; /* Dry run flag */ |
| 53 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 54 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 55 | |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 56 | /* If there is no space to write, returns -E2BIG. */ |
| 57 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
Masami Hiramatsu | 8498845 | 2009-12-07 12:00:53 -0500 | [diff] [blame] | 58 | __attribute__((format(printf, 3, 4))); |
| 59 | |
| 60 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 61 | { |
| 62 | int ret; |
| 63 | va_list ap; |
| 64 | va_start(ap, format); |
| 65 | ret = vsnprintf(str, size, format, ap); |
| 66 | va_end(ap); |
| 67 | if (ret >= (int)size) |
| 68 | ret = -E2BIG; |
| 69 | return ret; |
| 70 | } |
| 71 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 72 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 73 | static int convert_name_to_addr(struct perf_probe_event *pev, |
| 74 | const char *exec); |
Masami Hiramatsu | 981d05a | 2014-01-16 09:39:44 +0000 | [diff] [blame] | 75 | static void clear_probe_trace_event(struct probe_trace_event *tev); |
Arnaldo Carvalho de Melo | d28c622 | 2010-04-27 21:20:43 -0300 | [diff] [blame] | 76 | static struct machine machine; |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 77 | |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 78 | /* Initialize symbol maps and path of vmlinux/modules */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 79 | static int init_vmlinux(void) |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 80 | { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 81 | int ret; |
| 82 | |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 83 | symbol_conf.sort_by_name = true; |
| 84 | if (symbol_conf.vmlinux_name == NULL) |
| 85 | symbol_conf.try_vmlinux_path = true; |
| 86 | else |
| 87 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 88 | ret = symbol__init(); |
| 89 | if (ret < 0) { |
| 90 | pr_debug("Failed to init symbol map.\n"); |
| 91 | goto out; |
| 92 | } |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 93 | |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 94 | ret = machine__init(&machine, "", HOST_KERNEL_ID); |
Arnaldo Carvalho de Melo | d28c622 | 2010-04-27 21:20:43 -0300 | [diff] [blame] | 95 | if (ret < 0) |
| 96 | goto out; |
| 97 | |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 98 | if (machine__create_kernel_maps(&machine) < 0) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 99 | pr_debug("machine__create_kernel_maps() failed.\n"); |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 100 | goto out; |
| 101 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 102 | out: |
| 103 | if (ret < 0) |
| 104 | pr_warning("Failed to init vmlinux path.\n"); |
| 105 | return ret; |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 106 | } |
| 107 | |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 108 | static struct symbol *__find_kernel_function_by_name(const char *name, |
| 109 | struct map **mapp) |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 110 | { |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 111 | return machine__find_kernel_function_by_name(&machine, name, mapp, |
| 112 | NULL); |
| 113 | } |
| 114 | |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 115 | static struct map *kernel_get_module_map(const char *module) |
| 116 | { |
| 117 | struct rb_node *nd; |
| 118 | struct map_groups *grp = &machine.kmaps; |
| 119 | |
Masami Hiramatsu | 14a8fd7 | 2011-06-27 16:27:51 +0900 | [diff] [blame] | 120 | /* A file path -- this is an offline module */ |
| 121 | if (module && strchr(module, '/')) |
| 122 | return machine__new_module(&machine, 0, module); |
| 123 | |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 124 | if (!module) |
| 125 | module = "kernel"; |
| 126 | |
| 127 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { |
| 128 | struct map *pos = rb_entry(nd, struct map, rb_node); |
| 129 | if (strncmp(pos->dso->short_name + 1, module, |
| 130 | pos->dso->short_name_len - 2) == 0) { |
| 131 | return pos; |
| 132 | } |
| 133 | } |
| 134 | return NULL; |
| 135 | } |
| 136 | |
| 137 | static struct dso *kernel_get_module_dso(const char *module) |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 138 | { |
| 139 | struct dso *dso; |
Franck Bui-Huu | fd930ff | 2010-12-10 14:06:03 +0100 | [diff] [blame] | 140 | struct map *map; |
| 141 | const char *vmlinux_name; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 142 | |
| 143 | if (module) { |
| 144 | list_for_each_entry(dso, &machine.kernel_dsos, node) { |
| 145 | if (strncmp(dso->short_name + 1, module, |
| 146 | dso->short_name_len - 2) == 0) |
| 147 | goto found; |
| 148 | } |
| 149 | pr_debug("Failed to find module %s.\n", module); |
| 150 | return NULL; |
Franck Bui-Huu | fd930ff | 2010-12-10 14:06:03 +0100 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | map = machine.vmlinux_maps[MAP__FUNCTION]; |
| 154 | dso = map->dso; |
| 155 | |
| 156 | vmlinux_name = symbol_conf.vmlinux_name; |
| 157 | if (vmlinux_name) { |
Arnaldo Carvalho de Melo | 5230fb7 | 2013-12-10 11:58:52 -0300 | [diff] [blame] | 158 | if (dso__load_vmlinux(dso, map, vmlinux_name, false, NULL) <= 0) |
Franck Bui-Huu | fd930ff | 2010-12-10 14:06:03 +0100 | [diff] [blame] | 159 | return NULL; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 160 | } else { |
Franck Bui-Huu | c3a34e0 | 2010-12-10 14:07:14 +0100 | [diff] [blame] | 161 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 162 | pr_debug("Failed to load kernel map.\n"); |
| 163 | return NULL; |
| 164 | } |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 165 | } |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 166 | found: |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 167 | return dso; |
| 168 | } |
| 169 | |
| 170 | const char *kernel_get_module_path(const char *module) |
| 171 | { |
| 172 | struct dso *dso = kernel_get_module_dso(module); |
| 173 | return (dso) ? dso->long_name : NULL; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 174 | } |
| 175 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 176 | static int init_user_exec(void) |
| 177 | { |
| 178 | int ret = 0; |
| 179 | |
| 180 | symbol_conf.try_vmlinux_path = false; |
| 181 | symbol_conf.sort_by_name = true; |
| 182 | ret = symbol__init(); |
| 183 | |
| 184 | if (ret < 0) |
| 185 | pr_debug("Failed to init symbol map.\n"); |
| 186 | |
| 187 | return ret; |
| 188 | } |
| 189 | |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 190 | static int convert_exec_to_group(const char *exec, char **result) |
| 191 | { |
| 192 | char *ptr1, *ptr2, *exec_copy; |
| 193 | char buf[64]; |
| 194 | int ret; |
| 195 | |
| 196 | exec_copy = strdup(exec); |
| 197 | if (!exec_copy) |
| 198 | return -ENOMEM; |
| 199 | |
| 200 | ptr1 = basename(exec_copy); |
| 201 | if (!ptr1) { |
| 202 | ret = -EINVAL; |
| 203 | goto out; |
| 204 | } |
| 205 | |
| 206 | ptr2 = strpbrk(ptr1, "-._"); |
| 207 | if (ptr2) |
| 208 | *ptr2 = '\0'; |
| 209 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); |
| 210 | if (ret < 0) |
| 211 | goto out; |
| 212 | |
| 213 | *result = strdup(buf); |
| 214 | ret = *result ? 0 : -ENOMEM; |
| 215 | |
| 216 | out: |
| 217 | free(exec_copy); |
| 218 | return ret; |
| 219 | } |
| 220 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 221 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, |
| 222 | struct perf_probe_point *pp) |
| 223 | { |
| 224 | pp->function = strdup(tp->symbol); |
| 225 | |
| 226 | if (pp->function == NULL) |
| 227 | return -ENOMEM; |
| 228 | |
| 229 | pp->offset = tp->offset; |
| 230 | pp->retprobe = tp->retprobe; |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
Ingo Molnar | 89fe808 | 2013-09-30 12:07:11 +0200 | [diff] [blame] | 235 | #ifdef HAVE_DWARF_SUPPORT |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 236 | /* Open new debuginfo of given module */ |
| 237 | static struct debuginfo *open_debuginfo(const char *module) |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 238 | { |
Masami Hiramatsu | 14a8fd7 | 2011-06-27 16:27:51 +0900 | [diff] [blame] | 239 | const char *path; |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 240 | |
Masami Hiramatsu | 14a8fd7 | 2011-06-27 16:27:51 +0900 | [diff] [blame] | 241 | /* A file path -- this is an offline module */ |
| 242 | if (module && strchr(module, '/')) |
| 243 | path = module; |
| 244 | else { |
| 245 | path = kernel_get_module_path(module); |
| 246 | |
| 247 | if (!path) { |
| 248 | pr_err("Failed to find path of %s module.\n", |
| 249 | module ?: "kernel"); |
| 250 | return NULL; |
| 251 | } |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 252 | } |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 253 | return debuginfo__new(path); |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 254 | } |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 255 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 256 | /* |
| 257 | * Convert trace point to probe point with debuginfo |
| 258 | * Currently only handles kprobes. |
| 259 | */ |
| 260 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 261 | struct perf_probe_point *pp) |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 262 | { |
| 263 | struct symbol *sym; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 264 | struct map *map; |
| 265 | u64 addr; |
| 266 | int ret = -ENOENT; |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 267 | struct debuginfo *dinfo; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 268 | |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 269 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 270 | if (sym) { |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 271 | addr = map->unmap_ip(map, sym->start + tp->offset); |
Arnaldo Carvalho de Melo | 9486aa3 | 2011-01-22 20:37:02 -0200 | [diff] [blame] | 272 | pr_debug("try to find %s+%ld@%" PRIx64 "\n", tp->symbol, |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 273 | tp->offset, addr); |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 274 | |
| 275 | dinfo = debuginfo__new_online_kernel(addr); |
| 276 | if (dinfo) { |
| 277 | ret = debuginfo__find_probe_point(dinfo, |
| 278 | (unsigned long)addr, pp); |
| 279 | debuginfo__delete(dinfo); |
| 280 | } else { |
| 281 | pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", |
| 282 | addr); |
| 283 | ret = -ENOENT; |
| 284 | } |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 285 | } |
| 286 | if (ret <= 0) { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 287 | pr_debug("Failed to find corresponding probes from " |
| 288 | "debuginfo. Use kprobe event information.\n"); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 289 | return convert_to_perf_probe_point(tp, pp); |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 290 | } |
| 291 | pp->retprobe = tp->retprobe; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 292 | |
| 293 | return 0; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 294 | } |
| 295 | |
Masami Hiramatsu | 99ca423 | 2014-01-16 09:39:49 +0000 | [diff] [blame] | 296 | static int get_text_start_address(const char *exec, unsigned long *address) |
| 297 | { |
| 298 | Elf *elf; |
| 299 | GElf_Ehdr ehdr; |
| 300 | GElf_Shdr shdr; |
| 301 | int fd, ret = -ENOENT; |
| 302 | |
| 303 | fd = open(exec, O_RDONLY); |
| 304 | if (fd < 0) |
| 305 | return -errno; |
| 306 | |
| 307 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
| 308 | if (elf == NULL) |
| 309 | return -EINVAL; |
| 310 | |
| 311 | if (gelf_getehdr(elf, &ehdr) == NULL) |
| 312 | goto out; |
| 313 | |
| 314 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) |
| 315 | goto out; |
| 316 | |
| 317 | *address = shdr.sh_addr - shdr.sh_offset; |
| 318 | ret = 0; |
| 319 | out: |
| 320 | elf_end(elf); |
| 321 | return ret; |
| 322 | } |
| 323 | |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 324 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
| 325 | int ntevs, const char *exec) |
| 326 | { |
| 327 | int i, ret = 0; |
| 328 | unsigned long offset, stext = 0; |
| 329 | char buf[32]; |
| 330 | |
| 331 | if (!exec) |
| 332 | return 0; |
| 333 | |
| 334 | ret = get_text_start_address(exec, &stext); |
| 335 | if (ret < 0) |
| 336 | return ret; |
| 337 | |
| 338 | for (i = 0; i < ntevs && ret >= 0; i++) { |
Masami Hiramatsu | 981a237 | 2014-02-05 05:18:58 +0000 | [diff] [blame] | 339 | /* point.address is the addres of point.symbol + point.offset */ |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 340 | offset = tevs[i].point.address - stext; |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 341 | tevs[i].point.offset = 0; |
Arnaldo Carvalho de Melo | 74cf249 | 2013-12-27 16:55:14 -0300 | [diff] [blame] | 342 | zfree(&tevs[i].point.symbol); |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 343 | ret = e_snprintf(buf, 32, "0x%lx", offset); |
| 344 | if (ret < 0) |
| 345 | break; |
| 346 | tevs[i].point.module = strdup(exec); |
| 347 | tevs[i].point.symbol = strdup(buf); |
| 348 | if (!tevs[i].point.symbol || !tevs[i].point.module) { |
| 349 | ret = -ENOMEM; |
| 350 | break; |
| 351 | } |
| 352 | tevs[i].uprobes = true; |
| 353 | } |
| 354 | |
| 355 | return ret; |
| 356 | } |
| 357 | |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 358 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
| 359 | int ntevs, const char *module) |
| 360 | { |
Masami Hiramatsu | 14a8fd7 | 2011-06-27 16:27:51 +0900 | [diff] [blame] | 361 | int i, ret = 0; |
| 362 | char *tmp; |
| 363 | |
| 364 | if (!module) |
| 365 | return 0; |
| 366 | |
| 367 | tmp = strrchr(module, '/'); |
| 368 | if (tmp) { |
| 369 | /* This is a module path -- get the module name */ |
| 370 | module = strdup(tmp + 1); |
| 371 | if (!module) |
| 372 | return -ENOMEM; |
| 373 | tmp = strchr(module, '.'); |
| 374 | if (tmp) |
| 375 | *tmp = '\0'; |
| 376 | tmp = (char *)module; /* For free() */ |
| 377 | } |
| 378 | |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 379 | for (i = 0; i < ntevs; i++) { |
| 380 | tevs[i].point.module = strdup(module); |
Masami Hiramatsu | 14a8fd7 | 2011-06-27 16:27:51 +0900 | [diff] [blame] | 381 | if (!tevs[i].point.module) { |
| 382 | ret = -ENOMEM; |
| 383 | break; |
| 384 | } |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 385 | } |
Masami Hiramatsu | 14a8fd7 | 2011-06-27 16:27:51 +0900 | [diff] [blame] | 386 | |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 387 | free(tmp); |
Masami Hiramatsu | 14a8fd7 | 2011-06-27 16:27:51 +0900 | [diff] [blame] | 388 | return ret; |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 389 | } |
| 390 | |
Masami Hiramatsu | 981d05a | 2014-01-16 09:39:44 +0000 | [diff] [blame] | 391 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
| 392 | { |
| 393 | int i; |
| 394 | |
| 395 | for (i = 0; i < ntevs; i++) |
| 396 | clear_probe_trace_event(tevs + i); |
| 397 | } |
| 398 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 399 | /* Try to find perf_probe_event with debuginfo */ |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 400 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 401 | struct probe_trace_event **tevs, |
Srikar Dronamraju | 4eced23 | 2012-02-02 19:50:40 +0530 | [diff] [blame] | 402 | int max_tevs, const char *target) |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 403 | { |
| 404 | bool need_dwarf = perf_probe_event_need_dwarf(pev); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 405 | struct debuginfo *dinfo; |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 406 | int ntevs, ret = 0; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 407 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 408 | dinfo = open_debuginfo(target); |
| 409 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 410 | if (!dinfo) { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 411 | if (need_dwarf) { |
| 412 | pr_warning("Failed to open debuginfo file.\n"); |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 413 | return -ENOENT; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 414 | } |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 415 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 416 | return 0; |
| 417 | } |
| 418 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 419 | /* Searching trace events corresponding to a probe event */ |
| 420 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); |
| 421 | |
| 422 | debuginfo__delete(dinfo); |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 423 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 424 | if (ntevs > 0) { /* Succeeded to find trace events */ |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 425 | pr_debug("find %d probe_trace_events.\n", ntevs); |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 426 | if (target) { |
| 427 | if (pev->uprobes) |
| 428 | ret = add_exec_to_probe_trace_events(*tevs, |
| 429 | ntevs, target); |
| 430 | else |
| 431 | ret = add_module_to_probe_trace_events(*tevs, |
| 432 | ntevs, target); |
| 433 | } |
Masami Hiramatsu | 981d05a | 2014-01-16 09:39:44 +0000 | [diff] [blame] | 434 | if (ret < 0) { |
| 435 | clear_probe_trace_events(*tevs, ntevs); |
| 436 | zfree(tevs); |
| 437 | } |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 438 | return ret < 0 ? ret : ntevs; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 439 | } |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 440 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 441 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
| 442 | pr_warning("Probe point '%s' not found.\n", |
| 443 | synthesize_perf_probe_point(&pev->point)); |
| 444 | return -ENOENT; |
| 445 | } |
| 446 | /* Error path : ntevs < 0 */ |
Masami Hiramatsu | 15eca30 | 2010-04-21 15:56:24 -0400 | [diff] [blame] | 447 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
| 448 | if (ntevs == -EBADF) { |
| 449 | pr_warning("Warning: No dwarf info found in the vmlinux - " |
| 450 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); |
| 451 | if (!need_dwarf) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 452 | pr_debug("Trying to use symbols.\n"); |
Masami Hiramatsu | 15eca30 | 2010-04-21 15:56:24 -0400 | [diff] [blame] | 453 | return 0; |
| 454 | } |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 455 | } |
Masami Hiramatsu | 15eca30 | 2010-04-21 15:56:24 -0400 | [diff] [blame] | 456 | return ntevs; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 457 | } |
| 458 | |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 459 | /* |
| 460 | * Find a src file from a DWARF tag path. Prepend optional source path prefix |
| 461 | * and chop off leading directories that do not exist. Result is passed back as |
| 462 | * a newly allocated path on success. |
| 463 | * Return 0 if file was found and readable, -errno otherwise. |
| 464 | */ |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 465 | static int get_real_path(const char *raw_path, const char *comp_dir, |
| 466 | char **new_path) |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 467 | { |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 468 | const char *prefix = symbol_conf.source_prefix; |
| 469 | |
| 470 | if (!prefix) { |
| 471 | if (raw_path[0] != '/' && comp_dir) |
| 472 | /* If not an absolute path, try to use comp_dir */ |
| 473 | prefix = comp_dir; |
| 474 | else { |
| 475 | if (access(raw_path, R_OK) == 0) { |
| 476 | *new_path = strdup(raw_path); |
| 477 | return 0; |
| 478 | } else |
| 479 | return -errno; |
| 480 | } |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 481 | } |
| 482 | |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 483 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 484 | if (!*new_path) |
| 485 | return -ENOMEM; |
| 486 | |
| 487 | for (;;) { |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 488 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 489 | |
| 490 | if (access(*new_path, R_OK) == 0) |
| 491 | return 0; |
| 492 | |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 493 | if (!symbol_conf.source_prefix) |
| 494 | /* In case of searching comp_dir, don't retry */ |
| 495 | return -errno; |
| 496 | |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 497 | switch (errno) { |
| 498 | case ENAMETOOLONG: |
| 499 | case ENOENT: |
| 500 | case EROFS: |
| 501 | case EFAULT: |
| 502 | raw_path = strchr(++raw_path, '/'); |
| 503 | if (!raw_path) { |
Arnaldo Carvalho de Melo | 0466252 | 2013-12-26 17:41:15 -0300 | [diff] [blame] | 504 | zfree(new_path); |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 505 | return -ENOENT; |
| 506 | } |
| 507 | continue; |
| 508 | |
| 509 | default: |
Arnaldo Carvalho de Melo | 0466252 | 2013-12-26 17:41:15 -0300 | [diff] [blame] | 510 | zfree(new_path); |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 511 | return -errno; |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 516 | #define LINEBUF_SIZE 256 |
| 517 | #define NR_ADDITIONAL_LINES 2 |
| 518 | |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 519 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 520 | { |
| 521 | char buf[LINEBUF_SIZE]; |
Franck Bui-Huu | befe341 | 2010-12-20 15:18:01 +0100 | [diff] [blame] | 522 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
| 523 | const char *prefix = NULL; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 524 | |
Franck Bui-Huu | befe341 | 2010-12-20 15:18:01 +0100 | [diff] [blame] | 525 | do { |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 526 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
| 527 | goto error; |
Franck Bui-Huu | befe341 | 2010-12-20 15:18:01 +0100 | [diff] [blame] | 528 | if (skip) |
| 529 | continue; |
| 530 | if (!prefix) { |
| 531 | prefix = show_num ? "%7d " : " "; |
| 532 | color_fprintf(stdout, color, prefix, l); |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 533 | } |
Franck Bui-Huu | befe341 | 2010-12-20 15:18:01 +0100 | [diff] [blame] | 534 | color_fprintf(stdout, color, "%s", buf); |
| 535 | |
| 536 | } while (strchr(buf, '\n') == NULL); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 537 | |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 538 | return 1; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 539 | error: |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 540 | if (ferror(fp)) { |
Franck Bui-Huu | 32b2b6e | 2010-12-22 17:37:13 +0100 | [diff] [blame] | 541 | pr_warning("File read error: %s\n", strerror(errno)); |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 542 | return -1; |
| 543 | } |
| 544 | return 0; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 545 | } |
| 546 | |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 547 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
| 548 | { |
| 549 | int rv = __show_one_line(fp, l, skip, show_num); |
| 550 | if (rv == 0) { |
| 551 | pr_warning("Source file is shorter than expected.\n"); |
| 552 | rv = -1; |
| 553 | } |
| 554 | return rv; |
| 555 | } |
| 556 | |
| 557 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
| 558 | #define show_one_line(f,l) _show_one_line(f,l,false,false) |
| 559 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) |
| 560 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) |
| 561 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 562 | /* |
| 563 | * Show line-range always requires debuginfo to find source file and |
| 564 | * line number. |
| 565 | */ |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 566 | int show_line_range(struct line_range *lr, const char *module) |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 567 | { |
Masami Hiramatsu | d3b63d7 | 2010-04-14 18:39:42 -0400 | [diff] [blame] | 568 | int l = 1; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 569 | struct line_node *ln; |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 570 | struct debuginfo *dinfo; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 571 | FILE *fp; |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 572 | int ret; |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 573 | char *tmp; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 574 | |
| 575 | /* Search a line range */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 576 | ret = init_vmlinux(); |
| 577 | if (ret < 0) |
| 578 | return ret; |
| 579 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 580 | dinfo = open_debuginfo(module); |
| 581 | if (!dinfo) { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 582 | pr_warning("Failed to open debuginfo file.\n"); |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 583 | return -ENOENT; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 584 | } |
| 585 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 586 | ret = debuginfo__find_line_range(dinfo, lr); |
| 587 | debuginfo__delete(dinfo); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 588 | if (ret == 0) { |
| 589 | pr_warning("Specified source line is not found.\n"); |
| 590 | return -ENOENT; |
| 591 | } else if (ret < 0) { |
| 592 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); |
| 593 | return ret; |
| 594 | } |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 595 | |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 596 | /* Convert source file path */ |
| 597 | tmp = lr->path; |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 598 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 599 | free(tmp); /* Free old path */ |
| 600 | if (ret < 0) { |
| 601 | pr_warning("Failed to find source file. (%d)\n", ret); |
| 602 | return ret; |
| 603 | } |
| 604 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 605 | setup_pager(); |
| 606 | |
| 607 | if (lr->function) |
Masami Hiramatsu | 8737ebd | 2011-02-10 18:08:16 +0900 | [diff] [blame] | 608 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 609 | lr->start - lr->offset); |
| 610 | else |
Franck Bui-Huu | 62c15fc | 2010-12-20 15:18:00 +0100 | [diff] [blame] | 611 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 612 | |
| 613 | fp = fopen(lr->path, "r"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 614 | if (fp == NULL) { |
| 615 | pr_warning("Failed to open %s: %s\n", lr->path, |
| 616 | strerror(errno)); |
| 617 | return -errno; |
| 618 | } |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 619 | /* Skip to starting line number */ |
Franck Bui-Huu | 44b81e9 | 2010-12-20 15:18:02 +0100 | [diff] [blame] | 620 | while (l < lr->start) { |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 621 | ret = skip_one_line(fp, l++); |
Franck Bui-Huu | 44b81e9 | 2010-12-20 15:18:02 +0100 | [diff] [blame] | 622 | if (ret < 0) |
| 623 | goto end; |
| 624 | } |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 625 | |
| 626 | list_for_each_entry(ln, &lr->line_list, list) { |
Franck Bui-Huu | 44b81e9 | 2010-12-20 15:18:02 +0100 | [diff] [blame] | 627 | for (; ln->line > l; l++) { |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 628 | ret = show_one_line(fp, l - lr->offset); |
Franck Bui-Huu | 44b81e9 | 2010-12-20 15:18:02 +0100 | [diff] [blame] | 629 | if (ret < 0) |
| 630 | goto end; |
| 631 | } |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 632 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 633 | if (ret < 0) |
| 634 | goto end; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | if (lr->end == INT_MAX) |
| 638 | lr->end = l + NR_ADDITIONAL_LINES; |
Franck Bui-Huu | fde52db | 2010-12-20 15:18:04 +0100 | [diff] [blame] | 639 | while (l <= lr->end) { |
| 640 | ret = show_one_line_or_eof(fp, l++ - lr->offset); |
| 641 | if (ret <= 0) |
Franck Bui-Huu | 44b81e9 | 2010-12-20 15:18:02 +0100 | [diff] [blame] | 642 | break; |
| 643 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 644 | end: |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 645 | fclose(fp); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 646 | return ret; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 647 | } |
| 648 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 649 | static int show_available_vars_at(struct debuginfo *dinfo, |
| 650 | struct perf_probe_event *pev, |
Masami Hiramatsu | bd09d7b | 2011-01-20 23:15:39 +0900 | [diff] [blame] | 651 | int max_vls, struct strfilter *_filter, |
| 652 | bool externs) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 653 | { |
| 654 | char *buf; |
Masami Hiramatsu | bd09d7b | 2011-01-20 23:15:39 +0900 | [diff] [blame] | 655 | int ret, i, nvars; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 656 | struct str_node *node; |
| 657 | struct variable_list *vls = NULL, *vl; |
Masami Hiramatsu | bd09d7b | 2011-01-20 23:15:39 +0900 | [diff] [blame] | 658 | const char *var; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 659 | |
| 660 | buf = synthesize_perf_probe_point(&pev->point); |
| 661 | if (!buf) |
| 662 | return -EINVAL; |
| 663 | pr_debug("Searching variables at %s\n", buf); |
| 664 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 665 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
| 666 | max_vls, externs); |
Masami Hiramatsu | bd09d7b | 2011-01-20 23:15:39 +0900 | [diff] [blame] | 667 | if (ret <= 0) { |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 668 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); |
Masami Hiramatsu | bd09d7b | 2011-01-20 23:15:39 +0900 | [diff] [blame] | 669 | goto end; |
| 670 | } |
| 671 | /* Some variables are found */ |
| 672 | fprintf(stdout, "Available variables at %s\n", buf); |
| 673 | for (i = 0; i < ret; i++) { |
| 674 | vl = &vls[i]; |
| 675 | /* |
| 676 | * A probe point might be converted to |
| 677 | * several trace points. |
| 678 | */ |
| 679 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, |
| 680 | vl->point.offset); |
Arnaldo Carvalho de Melo | 74cf249 | 2013-12-27 16:55:14 -0300 | [diff] [blame] | 681 | zfree(&vl->point.symbol); |
Masami Hiramatsu | bd09d7b | 2011-01-20 23:15:39 +0900 | [diff] [blame] | 682 | nvars = 0; |
| 683 | if (vl->vars) { |
| 684 | strlist__for_each(node, vl->vars) { |
| 685 | var = strchr(node->s, '\t') + 1; |
| 686 | if (strfilter__compare(_filter, var)) { |
| 687 | fprintf(stdout, "\t\t%s\n", node->s); |
| 688 | nvars++; |
| 689 | } |
| 690 | } |
| 691 | strlist__delete(vl->vars); |
| 692 | } |
| 693 | if (nvars == 0) |
| 694 | fprintf(stdout, "\t\t(No matched variables)\n"); |
| 695 | } |
| 696 | free(vls); |
| 697 | end: |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 698 | free(buf); |
| 699 | return ret; |
| 700 | } |
| 701 | |
| 702 | /* Show available variables on given probe point */ |
| 703 | int show_available_vars(struct perf_probe_event *pevs, int npevs, |
Masami Hiramatsu | bd09d7b | 2011-01-20 23:15:39 +0900 | [diff] [blame] | 704 | int max_vls, const char *module, |
| 705 | struct strfilter *_filter, bool externs) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 706 | { |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 707 | int i, ret = 0; |
| 708 | struct debuginfo *dinfo; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 709 | |
| 710 | ret = init_vmlinux(); |
| 711 | if (ret < 0) |
| 712 | return ret; |
| 713 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 714 | dinfo = open_debuginfo(module); |
| 715 | if (!dinfo) { |
| 716 | pr_warning("Failed to open debuginfo file.\n"); |
| 717 | return -ENOENT; |
| 718 | } |
| 719 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 720 | setup_pager(); |
| 721 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 722 | for (i = 0; i < npevs && ret >= 0; i++) |
| 723 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, |
Masami Hiramatsu | bd09d7b | 2011-01-20 23:15:39 +0900 | [diff] [blame] | 724 | externs); |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 725 | |
| 726 | debuginfo__delete(dinfo); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 727 | return ret; |
| 728 | } |
| 729 | |
Ingo Molnar | 89fe808 | 2013-09-30 12:07:11 +0200 | [diff] [blame] | 730 | #else /* !HAVE_DWARF_SUPPORT */ |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 731 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 732 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 733 | struct perf_probe_point *pp) |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 734 | { |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 735 | struct symbol *sym; |
| 736 | |
| 737 | sym = __find_kernel_function_by_name(tp->symbol, NULL); |
| 738 | if (!sym) { |
| 739 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); |
| 740 | return -ENOENT; |
| 741 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 742 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 743 | return convert_to_perf_probe_point(tp, pp); |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 744 | } |
| 745 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 746 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
Irina Tirdea | 1d037ca | 2012-09-11 01:15:03 +0300 | [diff] [blame] | 747 | struct probe_trace_event **tevs __maybe_unused, |
Arnaldo Carvalho de Melo | 1d027ee | 2014-01-13 15:15:25 -0300 | [diff] [blame] | 748 | int max_tevs __maybe_unused, |
| 749 | const char *target __maybe_unused) |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 750 | { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 751 | if (perf_probe_event_need_dwarf(pev)) { |
| 752 | pr_warning("Debuginfo-analysis is not supported.\n"); |
| 753 | return -ENOSYS; |
| 754 | } |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 755 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 756 | return 0; |
| 757 | } |
| 758 | |
Irina Tirdea | 1d037ca | 2012-09-11 01:15:03 +0300 | [diff] [blame] | 759 | int show_line_range(struct line_range *lr __maybe_unused, |
| 760 | const char *module __maybe_unused) |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 761 | { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 762 | pr_warning("Debuginfo-analysis is not supported.\n"); |
| 763 | return -ENOSYS; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 764 | } |
| 765 | |
Irina Tirdea | 1d037ca | 2012-09-11 01:15:03 +0300 | [diff] [blame] | 766 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
| 767 | int npevs __maybe_unused, int max_vls __maybe_unused, |
| 768 | const char *module __maybe_unused, |
| 769 | struct strfilter *filter __maybe_unused, |
| 770 | bool externs __maybe_unused) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 771 | { |
| 772 | pr_warning("Debuginfo-analysis is not supported.\n"); |
| 773 | return -ENOSYS; |
| 774 | } |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 775 | #endif |
| 776 | |
Masami Hiramatsu | e53b00d | 2014-01-16 09:39:47 +0000 | [diff] [blame] | 777 | void line_range__clear(struct line_range *lr) |
| 778 | { |
| 779 | struct line_node *ln; |
| 780 | |
| 781 | free(lr->function); |
| 782 | free(lr->file); |
| 783 | free(lr->path); |
| 784 | free(lr->comp_dir); |
| 785 | while (!list_empty(&lr->line_list)) { |
| 786 | ln = list_first_entry(&lr->line_list, struct line_node, list); |
| 787 | list_del(&ln->list); |
| 788 | free(ln); |
| 789 | } |
| 790 | memset(lr, 0, sizeof(*lr)); |
| 791 | } |
| 792 | |
| 793 | void line_range__init(struct line_range *lr) |
| 794 | { |
| 795 | memset(lr, 0, sizeof(*lr)); |
| 796 | INIT_LIST_HEAD(&lr->line_list); |
| 797 | } |
| 798 | |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 799 | static int parse_line_num(char **ptr, int *val, const char *what) |
| 800 | { |
| 801 | const char *start = *ptr; |
| 802 | |
| 803 | errno = 0; |
| 804 | *val = strtol(*ptr, ptr, 0); |
| 805 | if (errno || *ptr == start) { |
| 806 | semantic_error("'%s' is not a valid number.\n", what); |
| 807 | return -EINVAL; |
| 808 | } |
| 809 | return 0; |
| 810 | } |
| 811 | |
Franck Bui-Huu | 9d95b58 | 2010-12-20 15:18:03 +0100 | [diff] [blame] | 812 | /* |
| 813 | * Stuff 'lr' according to the line range described by 'arg'. |
| 814 | * The line range syntax is described by: |
| 815 | * |
| 816 | * SRC[:SLN[+NUM|-ELN]] |
Masami Hiramatsu | e116dfa | 2011-02-10 18:08:10 +0900 | [diff] [blame] | 817 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
Franck Bui-Huu | 9d95b58 | 2010-12-20 15:18:03 +0100 | [diff] [blame] | 818 | */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 819 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 820 | { |
Masami Hiramatsu | e116dfa | 2011-02-10 18:08:10 +0900 | [diff] [blame] | 821 | char *range, *file, *name = strdup(arg); |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 822 | int err; |
Franck Bui-Huu | 9d95b58 | 2010-12-20 15:18:03 +0100 | [diff] [blame] | 823 | |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 824 | if (!name) |
| 825 | return -ENOMEM; |
| 826 | |
| 827 | lr->start = 0; |
| 828 | lr->end = INT_MAX; |
| 829 | |
| 830 | range = strchr(name, ':'); |
| 831 | if (range) { |
| 832 | *range++ = '\0'; |
| 833 | |
| 834 | err = parse_line_num(&range, &lr->start, "start line"); |
| 835 | if (err) |
| 836 | goto err; |
| 837 | |
| 838 | if (*range == '+' || *range == '-') { |
| 839 | const char c = *range++; |
| 840 | |
| 841 | err = parse_line_num(&range, &lr->end, "end line"); |
| 842 | if (err) |
| 843 | goto err; |
| 844 | |
| 845 | if (c == '+') { |
| 846 | lr->end += lr->start; |
| 847 | /* |
| 848 | * Adjust the number of lines here. |
| 849 | * If the number of lines == 1, the |
| 850 | * the end of line should be equal to |
| 851 | * the start of line. |
| 852 | */ |
| 853 | lr->end--; |
| 854 | } |
| 855 | } |
| 856 | |
Masami Hiramatsu | d3b63d7 | 2010-04-14 18:39:42 -0400 | [diff] [blame] | 857 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 858 | |
| 859 | err = -EINVAL; |
Masami Hiramatsu | d3b63d7 | 2010-04-14 18:39:42 -0400 | [diff] [blame] | 860 | if (lr->start > lr->end) { |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 861 | semantic_error("Start line must be smaller" |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 862 | " than end line.\n"); |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 863 | goto err; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 864 | } |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 865 | if (*range != '\0') { |
| 866 | semantic_error("Tailing with invalid str '%s'.\n", range); |
| 867 | goto err; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 868 | } |
Masami Hiramatsu | d3b63d7 | 2010-04-14 18:39:42 -0400 | [diff] [blame] | 869 | } |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 870 | |
Masami Hiramatsu | e116dfa | 2011-02-10 18:08:10 +0900 | [diff] [blame] | 871 | file = strchr(name, '@'); |
| 872 | if (file) { |
| 873 | *file = '\0'; |
| 874 | lr->file = strdup(++file); |
| 875 | if (lr->file == NULL) { |
| 876 | err = -ENOMEM; |
| 877 | goto err; |
| 878 | } |
| 879 | lr->function = name; |
| 880 | } else if (strchr(name, '.')) |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 881 | lr->file = name; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 882 | else |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 883 | lr->function = name; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 884 | |
| 885 | return 0; |
Franck Bui-Huu | 21dd9ae | 2010-12-20 15:18:05 +0100 | [diff] [blame] | 886 | err: |
| 887 | free(name); |
| 888 | return err; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 889 | } |
| 890 | |
Masami Hiramatsu | b7702a2 | 2009-12-16 17:24:15 -0500 | [diff] [blame] | 891 | /* Check the name is good for event/group */ |
| 892 | static bool check_event_name(const char *name) |
| 893 | { |
| 894 | if (!isalpha(*name) && *name != '_') |
| 895 | return false; |
| 896 | while (*++name != '\0') { |
| 897 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') |
| 898 | return false; |
| 899 | } |
| 900 | return true; |
| 901 | } |
| 902 | |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 903 | /* Parse probepoint definition. */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 904 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 905 | { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 906 | struct perf_probe_point *pp = &pev->point; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 907 | char *ptr, *tmp; |
| 908 | char c, nc = 0; |
| 909 | /* |
| 910 | * <Syntax> |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 911 | * perf probe [EVENT=]SRC[:LN|;PTN] |
| 912 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] |
Masami Hiramatsu | af663d7 | 2009-12-15 10:32:18 -0500 | [diff] [blame] | 913 | * |
| 914 | * TODO:Group name support |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 915 | */ |
| 916 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 917 | ptr = strpbrk(arg, ";=@+%"); |
| 918 | if (ptr && *ptr == '=') { /* Event name */ |
Masami Hiramatsu | af663d7 | 2009-12-15 10:32:18 -0500 | [diff] [blame] | 919 | *ptr = '\0'; |
| 920 | tmp = ptr + 1; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 921 | if (strchr(arg, ':')) { |
| 922 | semantic_error("Group name is not supported yet.\n"); |
| 923 | return -ENOTSUP; |
| 924 | } |
| 925 | if (!check_event_name(arg)) { |
Masami Hiramatsu | b7702a2 | 2009-12-16 17:24:15 -0500 | [diff] [blame] | 926 | semantic_error("%s is bad for event name -it must " |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 927 | "follow C symbol-naming rule.\n", arg); |
| 928 | return -EINVAL; |
| 929 | } |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 930 | pev->event = strdup(arg); |
| 931 | if (pev->event == NULL) |
| 932 | return -ENOMEM; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 933 | pev->group = NULL; |
Masami Hiramatsu | af663d7 | 2009-12-15 10:32:18 -0500 | [diff] [blame] | 934 | arg = tmp; |
| 935 | } |
| 936 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 937 | ptr = strpbrk(arg, ";:+@%"); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 938 | if (ptr) { |
| 939 | nc = *ptr; |
| 940 | *ptr++ = '\0'; |
| 941 | } |
| 942 | |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 943 | tmp = strdup(arg); |
| 944 | if (tmp == NULL) |
| 945 | return -ENOMEM; |
| 946 | |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 947 | /* Check arg is function or file and copy it */ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 948 | if (strchr(tmp, '.')) /* File */ |
| 949 | pp->file = tmp; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 950 | else /* Function */ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 951 | pp->function = tmp; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 952 | |
| 953 | /* Parse other options */ |
| 954 | while (ptr) { |
| 955 | arg = ptr; |
| 956 | c = nc; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 957 | if (c == ';') { /* Lazy pattern must be the last part */ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 958 | pp->lazy_line = strdup(arg); |
| 959 | if (pp->lazy_line == NULL) |
| 960 | return -ENOMEM; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 961 | break; |
| 962 | } |
| 963 | ptr = strpbrk(arg, ";:+@%"); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 964 | if (ptr) { |
| 965 | nc = *ptr; |
| 966 | *ptr++ = '\0'; |
| 967 | } |
| 968 | switch (c) { |
| 969 | case ':': /* Line number */ |
| 970 | pp->line = strtoul(arg, &tmp, 0); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 971 | if (*tmp != '\0') { |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 972 | semantic_error("There is non-digit char" |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 973 | " in line number.\n"); |
| 974 | return -EINVAL; |
| 975 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 976 | break; |
| 977 | case '+': /* Byte offset from a symbol */ |
| 978 | pp->offset = strtoul(arg, &tmp, 0); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 979 | if (*tmp != '\0') { |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 980 | semantic_error("There is non-digit character" |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 981 | " in offset.\n"); |
| 982 | return -EINVAL; |
| 983 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 984 | break; |
| 985 | case '@': /* File name */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 986 | if (pp->file) { |
| 987 | semantic_error("SRC@SRC is not allowed.\n"); |
| 988 | return -EINVAL; |
| 989 | } |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 990 | pp->file = strdup(arg); |
| 991 | if (pp->file == NULL) |
| 992 | return -ENOMEM; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 993 | break; |
| 994 | case '%': /* Probe places */ |
| 995 | if (strcmp(arg, "return") == 0) { |
| 996 | pp->retprobe = 1; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 997 | } else { /* Others not supported yet */ |
| 998 | semantic_error("%%%s is not supported.\n", arg); |
| 999 | return -ENOTSUP; |
| 1000 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1001 | break; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1002 | default: /* Buggy case */ |
| 1003 | pr_err("This program has a bug at %s:%d.\n", |
| 1004 | __FILE__, __LINE__); |
| 1005 | return -ENOTSUP; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1006 | break; |
| 1007 | } |
| 1008 | } |
| 1009 | |
| 1010 | /* Exclusion check */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1011 | if (pp->lazy_line && pp->line) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1012 | semantic_error("Lazy pattern can't be used with" |
| 1013 | " line number.\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1014 | return -EINVAL; |
| 1015 | } |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 1016 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1017 | if (pp->lazy_line && pp->offset) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1018 | semantic_error("Lazy pattern can't be used with offset.\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1019 | return -EINVAL; |
| 1020 | } |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 1021 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1022 | if (pp->line && pp->offset) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1023 | semantic_error("Offset can't be used with line number.\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1024 | return -EINVAL; |
| 1025 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1026 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1027 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 1028 | semantic_error("File always requires line number or " |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1029 | "lazy pattern.\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1030 | return -EINVAL; |
| 1031 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1032 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1033 | if (pp->offset && !pp->function) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1034 | semantic_error("Offset requires an entry function.\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1035 | return -EINVAL; |
| 1036 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1037 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1038 | if (pp->retprobe && !pp->function) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1039 | semantic_error("Return probe requires an entry function.\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1040 | return -EINVAL; |
| 1041 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1042 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1043 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 1044 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1045 | "return probe.\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1046 | return -EINVAL; |
| 1047 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1048 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1049 | 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] | 1050 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
| 1051 | pp->lazy_line); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1052 | return 0; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1053 | } |
| 1054 | |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1055 | /* Parse perf-probe event argument */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1056 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1057 | { |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1058 | char *tmp, *goodname; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1059 | struct perf_probe_arg_field **fieldp; |
| 1060 | |
| 1061 | pr_debug("parsing arg: %s into ", str); |
| 1062 | |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 1063 | tmp = strchr(str, '='); |
| 1064 | if (tmp) { |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1065 | arg->name = strndup(str, tmp - str); |
| 1066 | if (arg->name == NULL) |
| 1067 | return -ENOMEM; |
Masami Hiramatsu | 11a1ca3 | 2010-04-12 13:17:22 -0400 | [diff] [blame] | 1068 | pr_debug("name:%s ", arg->name); |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 1069 | str = tmp + 1; |
| 1070 | } |
| 1071 | |
Masami Hiramatsu | 11a1ca3 | 2010-04-12 13:17:22 -0400 | [diff] [blame] | 1072 | tmp = strchr(str, ':'); |
| 1073 | if (tmp) { /* Type setting */ |
| 1074 | *tmp = '\0'; |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1075 | arg->type = strdup(tmp + 1); |
| 1076 | if (arg->type == NULL) |
| 1077 | return -ENOMEM; |
Masami Hiramatsu | 11a1ca3 | 2010-04-12 13:17:22 -0400 | [diff] [blame] | 1078 | pr_debug("type:%s ", arg->type); |
| 1079 | } |
| 1080 | |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1081 | tmp = strpbrk(str, "-.["); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1082 | if (!is_c_varname(str) || !tmp) { |
| 1083 | /* A variable, register, symbol or special value */ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1084 | arg->var = strdup(str); |
| 1085 | if (arg->var == NULL) |
| 1086 | return -ENOMEM; |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 1087 | pr_debug("%s\n", arg->var); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1088 | return 0; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1089 | } |
| 1090 | |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1091 | /* Structure fields or array element */ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1092 | arg->var = strndup(str, tmp - str); |
| 1093 | if (arg->var == NULL) |
| 1094 | return -ENOMEM; |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1095 | goodname = arg->var; |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 1096 | pr_debug("%s, ", arg->var); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1097 | fieldp = &arg->field; |
| 1098 | |
| 1099 | do { |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 1100 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
| 1101 | if (*fieldp == NULL) |
| 1102 | return -ENOMEM; |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1103 | if (*tmp == '[') { /* Array */ |
| 1104 | str = tmp; |
| 1105 | (*fieldp)->index = strtol(str + 1, &tmp, 0); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1106 | (*fieldp)->ref = true; |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1107 | if (*tmp != ']' || tmp == str + 1) { |
| 1108 | semantic_error("Array index must be a" |
| 1109 | " number.\n"); |
| 1110 | return -EINVAL; |
| 1111 | } |
| 1112 | tmp++; |
| 1113 | if (*tmp == '\0') |
| 1114 | tmp = NULL; |
| 1115 | } else { /* Structure */ |
| 1116 | if (*tmp == '.') { |
| 1117 | str = tmp + 1; |
| 1118 | (*fieldp)->ref = false; |
| 1119 | } else if (tmp[1] == '>') { |
| 1120 | str = tmp + 2; |
| 1121 | (*fieldp)->ref = true; |
| 1122 | } else { |
| 1123 | semantic_error("Argument parse error: %s\n", |
| 1124 | str); |
| 1125 | return -EINVAL; |
| 1126 | } |
| 1127 | tmp = strpbrk(str, "-.["); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1128 | } |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1129 | if (tmp) { |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1130 | (*fieldp)->name = strndup(str, tmp - str); |
| 1131 | if ((*fieldp)->name == NULL) |
| 1132 | return -ENOMEM; |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1133 | if (*str != '[') |
| 1134 | goodname = (*fieldp)->name; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1135 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
| 1136 | fieldp = &(*fieldp)->next; |
| 1137 | } |
| 1138 | } while (tmp); |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1139 | (*fieldp)->name = strdup(str); |
| 1140 | if ((*fieldp)->name == NULL) |
| 1141 | return -ENOMEM; |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1142 | if (*str != '[') |
| 1143 | goodname = (*fieldp)->name; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1144 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
Masami Hiramatsu | df0faf4 | 2010-04-12 13:17:00 -0400 | [diff] [blame] | 1145 | |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1146 | /* If no name is specified, set the last field name (not array index)*/ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1147 | if (!arg->name) { |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1148 | arg->name = strdup(goodname); |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1149 | if (arg->name == NULL) |
| 1150 | return -ENOMEM; |
| 1151 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1152 | return 0; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1153 | } |
| 1154 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1155 | /* Parse perf-probe event command */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1156 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1157 | { |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 1158 | char **argv; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1159 | int argc, i, ret = 0; |
Masami Hiramatsu | fac13fd | 2009-12-15 10:31:14 -0500 | [diff] [blame] | 1160 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1161 | argv = argv_split(cmd, &argc); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1162 | if (!argv) { |
| 1163 | pr_debug("Failed to split arguments.\n"); |
| 1164 | return -ENOMEM; |
| 1165 | } |
| 1166 | if (argc - 1 > MAX_PROBE_ARGS) { |
| 1167 | semantic_error("Too many probe arguments (%d).\n", argc - 1); |
| 1168 | ret = -ERANGE; |
| 1169 | goto out; |
| 1170 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1171 | /* Parse probe point */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1172 | ret = parse_perf_probe_point(argv[0], pev); |
| 1173 | if (ret < 0) |
| 1174 | goto out; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1175 | |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 1176 | /* Copy arguments and ensure return probe has no C argument */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1177 | pev->nargs = argc - 1; |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 1178 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
| 1179 | if (pev->args == NULL) { |
| 1180 | ret = -ENOMEM; |
| 1181 | goto out; |
| 1182 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1183 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
| 1184 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); |
| 1185 | if (ret >= 0 && |
| 1186 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1187 | semantic_error("You can't specify local variable for" |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1188 | " kretprobe.\n"); |
| 1189 | ret = -EINVAL; |
| 1190 | } |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 1191 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1192 | out: |
Masami Hiramatsu | e1c01d6 | 2009-11-30 19:20:05 -0500 | [diff] [blame] | 1193 | argv_free(argv); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1194 | |
| 1195 | return ret; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1196 | } |
| 1197 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1198 | /* Return true if this perf_probe_event requires debuginfo */ |
| 1199 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1200 | { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1201 | int i; |
| 1202 | |
| 1203 | if (pev->point.file || pev->point.line || pev->point.lazy_line) |
| 1204 | return true; |
| 1205 | |
| 1206 | for (i = 0; i < pev->nargs; i++) |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 1207 | if (is_c_varname(pev->args[i].var)) |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1208 | return true; |
| 1209 | |
| 1210 | return false; |
| 1211 | } |
| 1212 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1213 | /* Parse probe_events event into struct probe_point */ |
| 1214 | static int parse_probe_trace_command(const char *cmd, |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 1215 | struct probe_trace_event *tev) |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1216 | { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1217 | struct probe_trace_point *tp = &tev->point; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1218 | char pr; |
| 1219 | char *p; |
Irina Tirdea | bcbd004 | 2012-09-20 23:37:50 +0300 | [diff] [blame] | 1220 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1221 | int ret, i, argc; |
| 1222 | char **argv; |
| 1223 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1224 | pr_debug("Parsing probe_events: %s\n", cmd); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1225 | argv = argv_split(cmd, &argc); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1226 | if (!argv) { |
| 1227 | pr_debug("Failed to split arguments.\n"); |
| 1228 | return -ENOMEM; |
| 1229 | } |
| 1230 | if (argc < 2) { |
| 1231 | semantic_error("Too few probe arguments.\n"); |
| 1232 | ret = -ERANGE; |
| 1233 | goto out; |
| 1234 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1235 | |
| 1236 | /* Scan event and group name. */ |
Irina Tirdea | bcbd004 | 2012-09-20 23:37:50 +0300 | [diff] [blame] | 1237 | argv0_str = strdup(argv[0]); |
| 1238 | if (argv0_str == NULL) { |
| 1239 | ret = -ENOMEM; |
| 1240 | goto out; |
| 1241 | } |
| 1242 | fmt1_str = strtok_r(argv0_str, ":", &fmt); |
| 1243 | fmt2_str = strtok_r(NULL, "/", &fmt); |
| 1244 | fmt3_str = strtok_r(NULL, " \t", &fmt); |
| 1245 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL |
| 1246 | || fmt3_str == NULL) { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1247 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
| 1248 | ret = -EINVAL; |
| 1249 | goto out; |
| 1250 | } |
Irina Tirdea | bcbd004 | 2012-09-20 23:37:50 +0300 | [diff] [blame] | 1251 | pr = fmt1_str[0]; |
| 1252 | tev->group = strdup(fmt2_str); |
| 1253 | tev->event = strdup(fmt3_str); |
| 1254 | if (tev->group == NULL || tev->event == NULL) { |
| 1255 | ret = -ENOMEM; |
| 1256 | goto out; |
| 1257 | } |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1258 | 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] | 1259 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1260 | tp->retprobe = (pr == 'r'); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1261 | |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 1262 | /* Scan module name(if there), function name and offset */ |
| 1263 | p = strchr(argv[1], ':'); |
| 1264 | if (p) { |
| 1265 | tp->module = strndup(argv[1], p - argv[1]); |
| 1266 | p++; |
| 1267 | } else |
| 1268 | p = argv[1]; |
Irina Tirdea | bcbd004 | 2012-09-20 23:37:50 +0300 | [diff] [blame] | 1269 | fmt1_str = strtok_r(p, "+", &fmt); |
| 1270 | tp->symbol = strdup(fmt1_str); |
| 1271 | if (tp->symbol == NULL) { |
| 1272 | ret = -ENOMEM; |
| 1273 | goto out; |
| 1274 | } |
| 1275 | fmt2_str = strtok_r(NULL, "", &fmt); |
| 1276 | if (fmt2_str == NULL) |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1277 | tp->offset = 0; |
Irina Tirdea | bcbd004 | 2012-09-20 23:37:50 +0300 | [diff] [blame] | 1278 | else |
| 1279 | tp->offset = strtoul(fmt2_str, NULL, 10); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1280 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1281 | tev->nargs = argc - 2; |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1282 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 1283 | if (tev->args == NULL) { |
| 1284 | ret = -ENOMEM; |
| 1285 | goto out; |
| 1286 | } |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1287 | for (i = 0; i < tev->nargs; i++) { |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1288 | p = strchr(argv[i + 2], '='); |
| 1289 | if (p) /* We don't need which register is assigned. */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1290 | *p++ = '\0'; |
| 1291 | else |
| 1292 | p = argv[i + 2]; |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1293 | tev->args[i].name = strdup(argv[i + 2]); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1294 | /* TODO: parse regs and offset */ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1295 | tev->args[i].value = strdup(p); |
| 1296 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { |
| 1297 | ret = -ENOMEM; |
| 1298 | goto out; |
| 1299 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1300 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1301 | ret = 0; |
| 1302 | out: |
Irina Tirdea | bcbd004 | 2012-09-20 23:37:50 +0300 | [diff] [blame] | 1303 | free(argv0_str); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1304 | argv_free(argv); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1305 | return ret; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1306 | } |
| 1307 | |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1308 | /* Compose only probe arg */ |
| 1309 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) |
| 1310 | { |
| 1311 | struct perf_probe_arg_field *field = pa->field; |
| 1312 | int ret; |
| 1313 | char *tmp = buf; |
| 1314 | |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 1315 | if (pa->name && pa->var) |
| 1316 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); |
| 1317 | else |
| 1318 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1319 | if (ret <= 0) |
| 1320 | goto error; |
| 1321 | tmp += ret; |
| 1322 | len -= ret; |
| 1323 | |
| 1324 | while (field) { |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 1325 | if (field->name[0] == '[') |
| 1326 | ret = e_snprintf(tmp, len, "%s", field->name); |
| 1327 | else |
| 1328 | ret = e_snprintf(tmp, len, "%s%s", |
| 1329 | field->ref ? "->" : ".", field->name); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1330 | if (ret <= 0) |
| 1331 | goto error; |
| 1332 | tmp += ret; |
| 1333 | len -= ret; |
| 1334 | field = field->next; |
| 1335 | } |
Masami Hiramatsu | 11a1ca3 | 2010-04-12 13:17:22 -0400 | [diff] [blame] | 1336 | |
| 1337 | if (pa->type) { |
| 1338 | ret = e_snprintf(tmp, len, ":%s", pa->type); |
| 1339 | if (ret <= 0) |
| 1340 | goto error; |
| 1341 | tmp += ret; |
| 1342 | len -= ret; |
| 1343 | } |
| 1344 | |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1345 | return tmp - buf; |
| 1346 | error: |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1347 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1348 | strerror(-ret)); |
| 1349 | return ret; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1350 | } |
| 1351 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1352 | /* Compose only probe point (not argument) */ |
| 1353 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1354 | { |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1355 | char *buf, *tmp; |
| 1356 | char offs[32] = "", line[32] = "", file[32] = ""; |
| 1357 | int ret, len; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1358 | |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 1359 | buf = zalloc(MAX_CMDLEN); |
| 1360 | if (buf == NULL) { |
| 1361 | ret = -ENOMEM; |
| 1362 | goto error; |
| 1363 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1364 | if (pp->offset) { |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1365 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1366 | if (ret <= 0) |
| 1367 | goto error; |
| 1368 | } |
| 1369 | if (pp->line) { |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1370 | ret = e_snprintf(line, 32, ":%d", pp->line); |
| 1371 | if (ret <= 0) |
| 1372 | goto error; |
| 1373 | } |
| 1374 | if (pp->file) { |
Franck Bui-Huu | 32ae2ad | 2010-12-23 16:04:23 +0100 | [diff] [blame] | 1375 | tmp = pp->file; |
| 1376 | len = strlen(tmp); |
| 1377 | if (len > 30) { |
| 1378 | tmp = strchr(pp->file + len - 30, '/'); |
| 1379 | tmp = tmp ? tmp + 1 : pp->file + len - 30; |
| 1380 | } |
| 1381 | ret = e_snprintf(file, 32, "@%s", tmp); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1382 | if (ret <= 0) |
| 1383 | goto error; |
| 1384 | } |
| 1385 | |
| 1386 | if (pp->function) |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1387 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
| 1388 | offs, pp->retprobe ? "%return" : "", line, |
| 1389 | file); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1390 | else |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1391 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1392 | if (ret <= 0) |
| 1393 | goto error; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1394 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1395 | return buf; |
| 1396 | error: |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1397 | pr_debug("Failed to synthesize perf probe point: %s\n", |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1398 | strerror(-ret)); |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 1399 | free(buf); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1400 | return NULL; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1401 | } |
| 1402 | |
| 1403 | #if 0 |
| 1404 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) |
| 1405 | { |
| 1406 | char *buf; |
| 1407 | int i, len, ret; |
| 1408 | |
| 1409 | buf = synthesize_perf_probe_point(&pev->point); |
| 1410 | if (!buf) |
| 1411 | return NULL; |
| 1412 | |
| 1413 | len = strlen(buf); |
| 1414 | for (i = 0; i < pev->nargs; i++) { |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1415 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1416 | pev->args[i].name); |
| 1417 | if (ret <= 0) { |
| 1418 | free(buf); |
| 1419 | return NULL; |
| 1420 | } |
| 1421 | len += ret; |
| 1422 | } |
| 1423 | |
| 1424 | return buf; |
| 1425 | } |
| 1426 | #endif |
| 1427 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1428 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1429 | char **buf, size_t *buflen, |
| 1430 | int depth) |
| 1431 | { |
| 1432 | int ret; |
| 1433 | if (ref->next) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1434 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1435 | buflen, depth + 1); |
| 1436 | if (depth < 0) |
| 1437 | goto out; |
| 1438 | } |
| 1439 | |
| 1440 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); |
| 1441 | if (ret < 0) |
| 1442 | depth = ret; |
| 1443 | else { |
| 1444 | *buf += ret; |
| 1445 | *buflen -= ret; |
| 1446 | } |
| 1447 | out: |
| 1448 | return depth; |
| 1449 | |
| 1450 | } |
| 1451 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1452 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1453 | char *buf, size_t buflen) |
| 1454 | { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1455 | struct probe_trace_arg_ref *ref = arg->ref; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1456 | int ret, depth = 0; |
| 1457 | char *tmp = buf; |
| 1458 | |
| 1459 | /* Argument name or separator */ |
| 1460 | if (arg->name) |
| 1461 | ret = e_snprintf(buf, buflen, " %s=", arg->name); |
| 1462 | else |
| 1463 | ret = e_snprintf(buf, buflen, " "); |
| 1464 | if (ret < 0) |
| 1465 | return ret; |
| 1466 | buf += ret; |
| 1467 | buflen -= ret; |
| 1468 | |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 1469 | /* Special case: @XXX */ |
| 1470 | if (arg->value[0] == '@' && arg->ref) |
| 1471 | ref = ref->next; |
| 1472 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1473 | /* Dereferencing arguments */ |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 1474 | if (ref) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1475 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1476 | &buflen, 1); |
| 1477 | if (depth < 0) |
| 1478 | return depth; |
| 1479 | } |
| 1480 | |
| 1481 | /* Print argument value */ |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 1482 | if (arg->value[0] == '@' && arg->ref) |
| 1483 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, |
| 1484 | arg->ref->offset); |
| 1485 | else |
| 1486 | ret = e_snprintf(buf, buflen, "%s", arg->value); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1487 | if (ret < 0) |
| 1488 | return ret; |
| 1489 | buf += ret; |
| 1490 | buflen -= ret; |
| 1491 | |
| 1492 | /* Closing */ |
| 1493 | while (depth--) { |
| 1494 | ret = e_snprintf(buf, buflen, ")"); |
| 1495 | if (ret < 0) |
| 1496 | return ret; |
| 1497 | buf += ret; |
| 1498 | buflen -= ret; |
| 1499 | } |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 1500 | /* Print argument type */ |
| 1501 | if (arg->type) { |
| 1502 | ret = e_snprintf(buf, buflen, ":%s", arg->type); |
| 1503 | if (ret <= 0) |
| 1504 | return ret; |
| 1505 | buf += ret; |
| 1506 | } |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1507 | |
| 1508 | return buf - tmp; |
| 1509 | } |
| 1510 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1511 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1512 | { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1513 | struct probe_trace_point *tp = &tev->point; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1514 | char *buf; |
| 1515 | int i, len, ret; |
| 1516 | |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 1517 | buf = zalloc(MAX_CMDLEN); |
| 1518 | if (buf == NULL) |
| 1519 | return NULL; |
| 1520 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1521 | if (tev->uprobes) |
| 1522 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s:%s", |
| 1523 | tp->retprobe ? 'r' : 'p', |
| 1524 | tev->group, tev->event, |
| 1525 | tp->module, tp->symbol); |
| 1526 | else |
| 1527 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", |
| 1528 | tp->retprobe ? 'r' : 'p', |
| 1529 | tev->group, tev->event, |
| 1530 | tp->module ?: "", tp->module ? ":" : "", |
| 1531 | tp->symbol, tp->offset); |
| 1532 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1533 | if (len <= 0) |
| 1534 | goto error; |
| 1535 | |
| 1536 | for (i = 0; i < tev->nargs; i++) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1537 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1538 | MAX_CMDLEN - len); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1539 | if (ret <= 0) |
| 1540 | goto error; |
| 1541 | len += ret; |
| 1542 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1543 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1544 | return buf; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1545 | error: |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1546 | free(buf); |
| 1547 | return NULL; |
| 1548 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1549 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1550 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1551 | struct perf_probe_event *pev, bool is_kprobe) |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1552 | { |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1553 | char buf[64] = ""; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1554 | int i, ret; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1555 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 1556 | /* Convert event/group name */ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1557 | pev->event = strdup(tev->event); |
| 1558 | pev->group = strdup(tev->group); |
| 1559 | if (pev->event == NULL || pev->group == NULL) |
| 1560 | return -ENOMEM; |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1561 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 1562 | /* Convert trace_point to probe_point */ |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1563 | if (is_kprobe) |
| 1564 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
| 1565 | else |
| 1566 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); |
| 1567 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1568 | if (ret < 0) |
| 1569 | return ret; |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 1570 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1571 | /* Convert trace_arg to probe_arg */ |
| 1572 | pev->nargs = tev->nargs; |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 1573 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
| 1574 | if (pev->args == NULL) |
| 1575 | return -ENOMEM; |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1576 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1577 | if (tev->args[i].name) |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1578 | pev->args[i].name = strdup(tev->args[i].name); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1579 | else { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1580 | ret = synthesize_probe_trace_arg(&tev->args[i], |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1581 | buf, 64); |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1582 | pev->args[i].name = strdup(buf); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1583 | } |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1584 | if (pev->args[i].name == NULL && ret >= 0) |
| 1585 | ret = -ENOMEM; |
| 1586 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1587 | |
| 1588 | if (ret < 0) |
| 1589 | clear_perf_probe_event(pev); |
| 1590 | |
| 1591 | return ret; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1592 | } |
| 1593 | |
| 1594 | void clear_perf_probe_event(struct perf_probe_event *pev) |
| 1595 | { |
| 1596 | struct perf_probe_point *pp = &pev->point; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1597 | struct perf_probe_arg_field *field, *next; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1598 | int i; |
| 1599 | |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 1600 | free(pev->event); |
| 1601 | free(pev->group); |
| 1602 | free(pp->file); |
| 1603 | free(pp->function); |
| 1604 | free(pp->lazy_line); |
| 1605 | |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1606 | for (i = 0; i < pev->nargs; i++) { |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 1607 | free(pev->args[i].name); |
| 1608 | free(pev->args[i].var); |
| 1609 | free(pev->args[i].type); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1610 | field = pev->args[i].field; |
| 1611 | while (field) { |
| 1612 | next = field->next; |
Arnaldo Carvalho de Melo | 74cf249 | 2013-12-27 16:55:14 -0300 | [diff] [blame] | 1613 | zfree(&field->name); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1614 | free(field); |
| 1615 | field = next; |
| 1616 | } |
| 1617 | } |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 1618 | free(pev->args); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1619 | memset(pev, 0, sizeof(*pev)); |
| 1620 | } |
| 1621 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1622 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1623 | { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1624 | struct probe_trace_arg_ref *ref, *next; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1625 | int i; |
| 1626 | |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 1627 | free(tev->event); |
| 1628 | free(tev->group); |
| 1629 | free(tev->point.symbol); |
| 1630 | free(tev->point.module); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1631 | for (i = 0; i < tev->nargs; i++) { |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 1632 | free(tev->args[i].name); |
| 1633 | free(tev->args[i].value); |
| 1634 | free(tev->args[i].type); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1635 | ref = tev->args[i].ref; |
| 1636 | while (ref) { |
| 1637 | next = ref->next; |
| 1638 | free(ref); |
| 1639 | ref = next; |
| 1640 | } |
| 1641 | } |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 1642 | free(tev->args); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1643 | memset(tev, 0, sizeof(*tev)); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1644 | } |
| 1645 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1646 | static void print_warn_msg(const char *file, bool is_kprobe) |
| 1647 | { |
| 1648 | |
| 1649 | if (errno == ENOENT) { |
| 1650 | const char *config; |
| 1651 | |
| 1652 | if (!is_kprobe) |
| 1653 | config = "CONFIG_UPROBE_EVENTS"; |
| 1654 | else |
| 1655 | config = "CONFIG_KPROBE_EVENTS"; |
| 1656 | |
| 1657 | pr_warning("%s file does not exist - please rebuild kernel" |
| 1658 | " with %s.\n", file, config); |
| 1659 | } else |
| 1660 | pr_warning("Failed to open %s file: %s\n", file, |
| 1661 | strerror(errno)); |
| 1662 | } |
| 1663 | |
| 1664 | static int open_probe_events(const char *trace_file, bool readwrite, |
| 1665 | bool is_kprobe) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1666 | { |
| 1667 | char buf[PATH_MAX]; |
Masami Hiramatsu | 7ca5989 | 2010-04-14 18:39:28 -0400 | [diff] [blame] | 1668 | const char *__debugfs; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1669 | int ret; |
| 1670 | |
Masami Hiramatsu | 7ca5989 | 2010-04-14 18:39:28 -0400 | [diff] [blame] | 1671 | __debugfs = debugfs_find_mountpoint(); |
| 1672 | if (__debugfs == NULL) { |
| 1673 | pr_warning("Debugfs is not mounted.\n"); |
| 1674 | return -ENOENT; |
| 1675 | } |
| 1676 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1677 | ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1678 | if (ret >= 0) { |
Masami Hiramatsu | 7ca5989 | 2010-04-14 18:39:28 -0400 | [diff] [blame] | 1679 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1680 | if (readwrite && !probe_event_dry_run) |
| 1681 | ret = open(buf, O_RDWR, O_APPEND); |
| 1682 | else |
| 1683 | ret = open(buf, O_RDONLY, 0); |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 1684 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1685 | if (ret < 0) |
| 1686 | print_warn_msg(buf, is_kprobe); |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1687 | } |
| 1688 | return ret; |
| 1689 | } |
| 1690 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1691 | static int open_kprobe_events(bool readwrite) |
| 1692 | { |
| 1693 | return open_probe_events("tracing/kprobe_events", readwrite, true); |
| 1694 | } |
| 1695 | |
| 1696 | static int open_uprobe_events(bool readwrite) |
| 1697 | { |
| 1698 | return open_probe_events("tracing/uprobe_events", readwrite, false); |
| 1699 | } |
| 1700 | |
| 1701 | /* Get raw string list of current kprobe_events or uprobe_events */ |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1702 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1703 | { |
| 1704 | int ret, idx; |
| 1705 | FILE *fp; |
| 1706 | char buf[MAX_CMDLEN]; |
| 1707 | char *p; |
| 1708 | struct strlist *sl; |
| 1709 | |
| 1710 | sl = strlist__new(true, NULL); |
| 1711 | |
| 1712 | fp = fdopen(dup(fd), "r"); |
| 1713 | while (!feof(fp)) { |
| 1714 | p = fgets(buf, MAX_CMDLEN, fp); |
| 1715 | if (!p) |
| 1716 | break; |
| 1717 | |
| 1718 | idx = strlen(p) - 1; |
| 1719 | if (p[idx] == '\n') |
| 1720 | p[idx] = '\0'; |
| 1721 | ret = strlist__add(sl, buf); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1722 | if (ret < 0) { |
| 1723 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); |
| 1724 | strlist__delete(sl); |
| 1725 | return NULL; |
| 1726 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1727 | } |
| 1728 | fclose(fp); |
| 1729 | |
| 1730 | return sl; |
| 1731 | } |
| 1732 | |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 1733 | /* Show an event */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1734 | static int show_perf_probe_event(struct perf_probe_event *pev) |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 1735 | { |
Masami Hiramatsu | 7e990a5 | 2009-12-15 10:31:21 -0500 | [diff] [blame] | 1736 | int i, ret; |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 1737 | char buf[128]; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1738 | char *place; |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 1739 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1740 | /* Synthesize only event probe point */ |
| 1741 | place = synthesize_perf_probe_point(&pev->point); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1742 | if (!place) |
| 1743 | return -EINVAL; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1744 | |
| 1745 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); |
Masami Hiramatsu | 7e990a5 | 2009-12-15 10:31:21 -0500 | [diff] [blame] | 1746 | if (ret < 0) |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1747 | return ret; |
| 1748 | |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1749 | printf(" %-20s (on %s", buf, place); |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 1750 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1751 | if (pev->nargs > 0) { |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 1752 | printf(" with"); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1753 | for (i = 0; i < pev->nargs; i++) { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1754 | ret = synthesize_perf_probe_arg(&pev->args[i], |
| 1755 | buf, 128); |
| 1756 | if (ret < 0) |
| 1757 | break; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 1758 | printf(" %s", buf); |
| 1759 | } |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 1760 | } |
| 1761 | printf(")\n"); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1762 | free(place); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1763 | return ret; |
Masami Hiramatsu | 278498d | 2009-12-08 17:02:40 -0500 | [diff] [blame] | 1764 | } |
| 1765 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1766 | static int __show_perf_probe_events(int fd, bool is_kprobe) |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1767 | { |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1768 | int ret = 0; |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1769 | struct probe_trace_event tev; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1770 | struct perf_probe_event pev; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1771 | struct strlist *rawlist; |
| 1772 | struct str_node *ent; |
| 1773 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1774 | memset(&tev, 0, sizeof(tev)); |
| 1775 | memset(&pev, 0, sizeof(pev)); |
Masami Hiramatsu | 7204133 | 2010-01-05 17:47:10 -0500 | [diff] [blame] | 1776 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1777 | rawlist = get_probe_trace_command_rawlist(fd); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1778 | if (!rawlist) |
| 1779 | return -ENOENT; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1780 | |
Masami Hiramatsu | adf365f | 2009-12-15 10:32:03 -0500 | [diff] [blame] | 1781 | strlist__for_each(ent, rawlist) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1782 | ret = parse_probe_trace_command(ent->s, &tev); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1783 | if (ret >= 0) { |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1784 | ret = convert_to_perf_probe_event(&tev, &pev, |
| 1785 | is_kprobe); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1786 | if (ret >= 0) |
| 1787 | ret = show_perf_probe_event(&pev); |
| 1788 | } |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1789 | clear_perf_probe_event(&pev); |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1790 | clear_probe_trace_event(&tev); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1791 | if (ret < 0) |
| 1792 | break; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1793 | } |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1794 | strlist__delete(rawlist); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1795 | |
| 1796 | return ret; |
Masami Hiramatsu | 4de189f | 2009-11-30 19:20:17 -0500 | [diff] [blame] | 1797 | } |
| 1798 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1799 | /* List up current perf-probe events */ |
| 1800 | int show_perf_probe_events(void) |
| 1801 | { |
| 1802 | int fd, ret; |
| 1803 | |
| 1804 | setup_pager(); |
| 1805 | fd = open_kprobe_events(false); |
| 1806 | |
| 1807 | if (fd < 0) |
| 1808 | return fd; |
| 1809 | |
| 1810 | ret = init_vmlinux(); |
| 1811 | if (ret < 0) |
| 1812 | return ret; |
| 1813 | |
| 1814 | ret = __show_perf_probe_events(fd, true); |
| 1815 | close(fd); |
| 1816 | |
| 1817 | fd = open_uprobe_events(false); |
| 1818 | if (fd >= 0) { |
| 1819 | ret = __show_perf_probe_events(fd, false); |
| 1820 | close(fd); |
| 1821 | } |
| 1822 | |
| 1823 | return ret; |
| 1824 | } |
| 1825 | |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1826 | /* Get current perf-probe event names */ |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1827 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1828 | { |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1829 | char buf[128]; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1830 | struct strlist *sl, *rawlist; |
| 1831 | struct str_node *ent; |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1832 | struct probe_trace_event tev; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1833 | int ret = 0; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1834 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1835 | memset(&tev, 0, sizeof(tev)); |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1836 | rawlist = get_probe_trace_command_rawlist(fd); |
Masami Hiramatsu | e1d2017 | 2009-12-07 12:00:46 -0500 | [diff] [blame] | 1837 | sl = strlist__new(true, NULL); |
Masami Hiramatsu | adf365f | 2009-12-15 10:32:03 -0500 | [diff] [blame] | 1838 | strlist__for_each(ent, rawlist) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1839 | ret = parse_probe_trace_command(ent->s, &tev); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1840 | if (ret < 0) |
| 1841 | break; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1842 | if (include_group) { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1843 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
| 1844 | tev.event); |
| 1845 | if (ret >= 0) |
| 1846 | ret = strlist__add(sl, buf); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1847 | } else |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1848 | ret = strlist__add(sl, tev.event); |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1849 | clear_probe_trace_event(&tev); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1850 | if (ret < 0) |
| 1851 | break; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1852 | } |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1853 | strlist__delete(rawlist); |
| 1854 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1855 | if (ret < 0) { |
| 1856 | strlist__delete(sl); |
| 1857 | return NULL; |
| 1858 | } |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1859 | return sl; |
| 1860 | } |
| 1861 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1862 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1863 | { |
Frederic Weisbecker | 6eca8cc | 2010-04-21 02:01:05 +0200 | [diff] [blame] | 1864 | int ret = 0; |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1865 | char *buf = synthesize_probe_trace_command(tev); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1866 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1867 | if (!buf) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1868 | pr_debug("Failed to synthesize probe trace event.\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1869 | return -EINVAL; |
| 1870 | } |
| 1871 | |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 1872 | pr_debug("Writing event: %s\n", buf); |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 1873 | if (!probe_event_dry_run) { |
| 1874 | ret = write(fd, buf, strlen(buf)); |
| 1875 | if (ret <= 0) |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1876 | pr_warning("Failed to write event: %s\n", |
| 1877 | strerror(errno)); |
Masami Hiramatsu | f4d7da4 | 2010-03-16 18:06:05 -0400 | [diff] [blame] | 1878 | } |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1879 | free(buf); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1880 | return ret; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1881 | } |
| 1882 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1883 | static int get_new_event_name(char *buf, size_t len, const char *base, |
| 1884 | struct strlist *namelist, bool allow_suffix) |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1885 | { |
| 1886 | int i, ret; |
Masami Hiramatsu | 17f88fc | 2009-12-08 17:03:02 -0500 | [diff] [blame] | 1887 | |
| 1888 | /* Try no suffix */ |
| 1889 | ret = e_snprintf(buf, len, "%s", base); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1890 | if (ret < 0) { |
| 1891 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); |
| 1892 | return ret; |
| 1893 | } |
Masami Hiramatsu | 17f88fc | 2009-12-08 17:03:02 -0500 | [diff] [blame] | 1894 | if (!strlist__has_entry(namelist, buf)) |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1895 | return 0; |
Masami Hiramatsu | 17f88fc | 2009-12-08 17:03:02 -0500 | [diff] [blame] | 1896 | |
Masami Hiramatsu | d761b08 | 2009-12-15 10:32:25 -0500 | [diff] [blame] | 1897 | if (!allow_suffix) { |
| 1898 | pr_warning("Error: event \"%s\" already exists. " |
| 1899 | "(Use -f to force duplicates.)\n", base); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1900 | return -EEXIST; |
Masami Hiramatsu | d761b08 | 2009-12-15 10:32:25 -0500 | [diff] [blame] | 1901 | } |
| 1902 | |
Masami Hiramatsu | 17f88fc | 2009-12-08 17:03:02 -0500 | [diff] [blame] | 1903 | /* Try to add suffix */ |
| 1904 | for (i = 1; i < MAX_EVENT_INDEX; i++) { |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1905 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1906 | if (ret < 0) { |
| 1907 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); |
| 1908 | return ret; |
| 1909 | } |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1910 | if (!strlist__has_entry(namelist, buf)) |
| 1911 | break; |
| 1912 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1913 | if (i == MAX_EVENT_INDEX) { |
| 1914 | pr_warning("Too many events are on the same function.\n"); |
| 1915 | ret = -ERANGE; |
| 1916 | } |
| 1917 | |
| 1918 | return ret; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1919 | } |
| 1920 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1921 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
| 1922 | struct probe_trace_event *tevs, |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1923 | int ntevs, bool allow_suffix) |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1924 | { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1925 | int i, fd, ret; |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1926 | struct probe_trace_event *tev = NULL; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1927 | char buf[64]; |
| 1928 | const char *event, *group; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1929 | struct strlist *namelist; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1930 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 1931 | if (pev->uprobes) |
| 1932 | fd = open_uprobe_events(true); |
| 1933 | else |
| 1934 | fd = open_kprobe_events(true); |
| 1935 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1936 | if (fd < 0) |
| 1937 | return fd; |
Masami Hiramatsu | b498ce1 | 2009-11-30 19:20:25 -0500 | [diff] [blame] | 1938 | /* Get current event names */ |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1939 | namelist = get_probe_trace_event_names(fd, false); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1940 | if (!namelist) { |
| 1941 | pr_debug("Failed to get current event list.\n"); |
| 1942 | return -EIO; |
| 1943 | } |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1944 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1945 | ret = 0; |
Srikar Dronamraju | a844d1e | 2012-01-20 17:43:54 +0530 | [diff] [blame] | 1946 | printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1947 | for (i = 0; i < ntevs; i++) { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1948 | tev = &tevs[i]; |
| 1949 | if (pev->event) |
| 1950 | event = pev->event; |
| 1951 | else |
| 1952 | if (pev->point.function) |
| 1953 | event = pev->point.function; |
| 1954 | else |
| 1955 | event = tev->point.symbol; |
| 1956 | if (pev->group) |
| 1957 | group = pev->group; |
| 1958 | else |
| 1959 | group = PERFPROBE_GROUP; |
| 1960 | |
| 1961 | /* Get an unused new event name */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1962 | ret = get_new_event_name(buf, 64, event, |
| 1963 | namelist, allow_suffix); |
| 1964 | if (ret < 0) |
| 1965 | break; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1966 | event = buf; |
| 1967 | |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1968 | tev->event = strdup(event); |
| 1969 | tev->group = strdup(group); |
| 1970 | if (tev->event == NULL || tev->group == NULL) { |
| 1971 | ret = -ENOMEM; |
| 1972 | break; |
| 1973 | } |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 1974 | ret = write_probe_trace_event(fd, tev); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1975 | if (ret < 0) |
| 1976 | break; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 1977 | /* Add added event name to namelist */ |
| 1978 | strlist__add(namelist, event); |
| 1979 | |
| 1980 | /* Trick here - save current event/group */ |
| 1981 | event = pev->event; |
| 1982 | group = pev->group; |
| 1983 | pev->event = tev->event; |
| 1984 | pev->group = tev->group; |
| 1985 | show_perf_probe_event(pev); |
| 1986 | /* Trick here - restore current event/group */ |
| 1987 | pev->event = (char *)event; |
| 1988 | pev->group = (char *)group; |
| 1989 | |
| 1990 | /* |
| 1991 | * Probes after the first probe which comes from same |
| 1992 | * user input are always allowed to add suffix, because |
| 1993 | * there might be several addresses corresponding to |
| 1994 | * one code line. |
| 1995 | */ |
| 1996 | allow_suffix = true; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 1997 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 1998 | |
| 1999 | if (ret >= 0) { |
| 2000 | /* Show how to use the event. */ |
Srikar Dronamraju | a844d1e | 2012-01-20 17:43:54 +0530 | [diff] [blame] | 2001 | printf("\nYou can now use it in all perf tools, such as:\n\n"); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2002 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, |
| 2003 | tev->event); |
| 2004 | } |
Masami Hiramatsu | a9b495b | 2009-12-08 17:02:47 -0500 | [diff] [blame] | 2005 | |
Masami Hiramatsu | e1d2017 | 2009-12-07 12:00:46 -0500 | [diff] [blame] | 2006 | strlist__delete(namelist); |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 2007 | close(fd); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2008 | return ret; |
Masami Hiramatsu | 50656ee | 2009-11-30 19:19:58 -0500 | [diff] [blame] | 2009 | } |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2010 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2011 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
| 2012 | struct probe_trace_event **tevs, |
Srikar Dronamraju | 4eced23 | 2012-02-02 19:50:40 +0530 | [diff] [blame] | 2013 | int max_tevs, const char *target) |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 2014 | { |
| 2015 | struct symbol *sym; |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 2016 | int ret, i; |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2017 | struct probe_trace_event *tev; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2018 | |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 2019 | if (pev->uprobes && !pev->group) { |
| 2020 | /* Replace group name if not given */ |
| 2021 | ret = convert_exec_to_group(target, &pev->group); |
| 2022 | if (ret != 0) { |
| 2023 | pr_warning("Failed to make a group name.\n"); |
| 2024 | return ret; |
| 2025 | } |
| 2026 | } |
| 2027 | |
Masami Hiramatsu | 4b4da7f | 2010-03-22 13:10:26 -0300 | [diff] [blame] | 2028 | /* Convert perf_probe_event with debuginfo */ |
Srikar Dronamraju | 4eced23 | 2012-02-02 19:50:40 +0530 | [diff] [blame] | 2029 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 2030 | if (ret != 0) |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 2031 | return ret; /* Found in debuginfo or got an error */ |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 2032 | |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 2033 | if (pev->uprobes) { |
| 2034 | ret = convert_name_to_addr(pev, target); |
| 2035 | if (ret < 0) |
| 2036 | return ret; |
| 2037 | } |
| 2038 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2039 | /* Allocate trace event buffer */ |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2040 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 2041 | if (tev == NULL) |
| 2042 | return -ENOMEM; |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 2043 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2044 | /* Copy parameters */ |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2045 | tev->point.symbol = strdup(pev->point.function); |
| 2046 | if (tev->point.symbol == NULL) { |
| 2047 | ret = -ENOMEM; |
| 2048 | goto error; |
| 2049 | } |
Jovi Zhang | ce27a44 | 2011-07-25 22:08:08 +0800 | [diff] [blame] | 2050 | |
Srikar Dronamraju | 4eced23 | 2012-02-02 19:50:40 +0530 | [diff] [blame] | 2051 | if (target) { |
| 2052 | tev->point.module = strdup(target); |
Jovi Zhang | ce27a44 | 2011-07-25 22:08:08 +0800 | [diff] [blame] | 2053 | if (tev->point.module == NULL) { |
| 2054 | ret = -ENOMEM; |
| 2055 | goto error; |
| 2056 | } |
Masami Hiramatsu | 190b57f | 2011-06-27 16:27:45 +0900 | [diff] [blame] | 2057 | } |
Jovi Zhang | ce27a44 | 2011-07-25 22:08:08 +0800 | [diff] [blame] | 2058 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2059 | tev->point.offset = pev->point.offset; |
Masami Hiramatsu | 04ddd04 | 2010-08-27 20:38:53 +0900 | [diff] [blame] | 2060 | tev->point.retprobe = pev->point.retprobe; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2061 | tev->nargs = pev->nargs; |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2062 | tev->uprobes = pev->uprobes; |
| 2063 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2064 | if (tev->nargs) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2065 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 2066 | * tev->nargs); |
| 2067 | if (tev->args == NULL) { |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2068 | ret = -ENOMEM; |
| 2069 | goto error; |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 2070 | } |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 2071 | for (i = 0; i < tev->nargs; i++) { |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2072 | if (pev->args[i].name) { |
| 2073 | tev->args[i].name = strdup(pev->args[i].name); |
| 2074 | if (tev->args[i].name == NULL) { |
| 2075 | ret = -ENOMEM; |
| 2076 | goto error; |
| 2077 | } |
| 2078 | } |
| 2079 | tev->args[i].value = strdup(pev->args[i].var); |
| 2080 | if (tev->args[i].value == NULL) { |
| 2081 | ret = -ENOMEM; |
| 2082 | goto error; |
| 2083 | } |
| 2084 | if (pev->args[i].type) { |
| 2085 | tev->args[i].type = strdup(pev->args[i].type); |
| 2086 | if (tev->args[i].type == NULL) { |
| 2087 | ret = -ENOMEM; |
| 2088 | goto error; |
| 2089 | } |
| 2090 | } |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 2091 | } |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 2092 | } |
| 2093 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2094 | if (pev->uprobes) |
| 2095 | return 1; |
| 2096 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2097 | /* Currently just checking function name from symbol map */ |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 2098 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2099 | if (!sym) { |
| 2100 | pr_warning("Kernel symbol \'%s\' not found.\n", |
| 2101 | tev->point.symbol); |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2102 | ret = -ENOENT; |
| 2103 | goto error; |
Prashanth Nageshappa | 1c1bc92 | 2012-02-28 09:43:01 +0530 | [diff] [blame] | 2104 | } else if (tev->point.offset > sym->end - sym->start) { |
| 2105 | pr_warning("Offset specified is greater than size of %s\n", |
| 2106 | tev->point.symbol); |
| 2107 | ret = -ENOENT; |
| 2108 | goto error; |
| 2109 | |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2110 | } |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 2111 | |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2112 | return 1; |
| 2113 | error: |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2114 | clear_probe_trace_event(tev); |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2115 | free(tev); |
| 2116 | *tevs = NULL; |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 2117 | return ret; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2118 | } |
| 2119 | |
| 2120 | struct __event_package { |
| 2121 | struct perf_probe_event *pev; |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2122 | struct probe_trace_event *tevs; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2123 | int ntevs; |
| 2124 | }; |
| 2125 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2126 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
Srikar Dronamraju | 4eced23 | 2012-02-02 19:50:40 +0530 | [diff] [blame] | 2127 | int max_tevs, const char *target, bool force_add) |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2128 | { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2129 | int i, j, ret; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2130 | struct __event_package *pkgs; |
| 2131 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2132 | ret = 0; |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 2133 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2134 | |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 2135 | if (pkgs == NULL) |
| 2136 | return -ENOMEM; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2137 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2138 | if (!pevs->uprobes) |
| 2139 | /* Init vmlinux path */ |
| 2140 | ret = init_vmlinux(); |
| 2141 | else |
| 2142 | ret = init_user_exec(); |
| 2143 | |
Masami Hiramatsu | 449e5b2 | 2010-08-03 11:11:40 +0900 | [diff] [blame] | 2144 | if (ret < 0) { |
| 2145 | free(pkgs); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2146 | return ret; |
Masami Hiramatsu | 449e5b2 | 2010-08-03 11:11:40 +0900 | [diff] [blame] | 2147 | } |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2148 | |
| 2149 | /* Loop 1: convert all events */ |
| 2150 | for (i = 0; i < npevs; i++) { |
| 2151 | pkgs[i].pev = &pevs[i]; |
| 2152 | /* Convert with or without debuginfo */ |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2153 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 2154 | &pkgs[i].tevs, |
| 2155 | max_tevs, |
Srikar Dronamraju | 4eced23 | 2012-02-02 19:50:40 +0530 | [diff] [blame] | 2156 | target); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2157 | if (ret < 0) |
| 2158 | goto end; |
| 2159 | pkgs[i].ntevs = ret; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2160 | } |
| 2161 | |
| 2162 | /* Loop 2: add all events */ |
Arnaldo Carvalho de Melo | 8635bf6 | 2011-02-22 06:56:18 -0300 | [diff] [blame] | 2163 | for (i = 0; i < npevs; i++) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2164 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2165 | pkgs[i].ntevs, force_add); |
Arnaldo Carvalho de Melo | fbee632 | 2011-02-21 13:23:57 -0300 | [diff] [blame] | 2166 | if (ret < 0) |
| 2167 | break; |
| 2168 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2169 | end: |
Masami Hiramatsu | 449e5b2 | 2010-08-03 11:11:40 +0900 | [diff] [blame] | 2170 | /* Loop 3: cleanup and free trace events */ |
| 2171 | for (i = 0; i < npevs; i++) { |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2172 | for (j = 0; j < pkgs[i].ntevs; j++) |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2173 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
Arnaldo Carvalho de Melo | 74cf249 | 2013-12-27 16:55:14 -0300 | [diff] [blame] | 2174 | zfree(&pkgs[i].tevs); |
Masami Hiramatsu | 449e5b2 | 2010-08-03 11:11:40 +0900 | [diff] [blame] | 2175 | } |
| 2176 | free(pkgs); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2177 | |
| 2178 | return ret; |
Masami Hiramatsu | e0faa8d | 2010-03-16 18:05:37 -0400 | [diff] [blame] | 2179 | } |
| 2180 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2181 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2182 | { |
| 2183 | char *p; |
| 2184 | char buf[128]; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2185 | int ret; |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2186 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2187 | /* Convert from perf-probe event to trace-probe event */ |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2188 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
| 2189 | if (ret < 0) |
| 2190 | goto error; |
| 2191 | |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2192 | p = strchr(buf + 2, ':'); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2193 | if (!p) { |
| 2194 | pr_debug("Internal error: %s should have ':' but not.\n", |
| 2195 | ent->s); |
| 2196 | ret = -ENOTSUP; |
| 2197 | goto error; |
| 2198 | } |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2199 | *p = '/'; |
| 2200 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 2201 | pr_debug("Writing event: %s\n", buf); |
| 2202 | ret = write(fd, buf, strlen(buf)); |
Masami Hiramatsu | 44a5604 | 2011-10-04 19:45:04 +0900 | [diff] [blame] | 2203 | if (ret < 0) { |
| 2204 | ret = -errno; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2205 | goto error; |
Masami Hiramatsu | 44a5604 | 2011-10-04 19:45:04 +0900 | [diff] [blame] | 2206 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2207 | |
Srikar Dronamraju | a844d1e | 2012-01-20 17:43:54 +0530 | [diff] [blame] | 2208 | printf("Removed event: %s\n", ent->s); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2209 | return 0; |
| 2210 | error: |
| 2211 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); |
| 2212 | return ret; |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2213 | } |
| 2214 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2215 | static int del_trace_probe_event(int fd, const char *buf, |
| 2216 | struct strlist *namelist) |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2217 | { |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2218 | struct str_node *ent, *n; |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2219 | int ret = -1; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2220 | |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2221 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
| 2222 | strlist__for_each_safe(ent, n, namelist) |
| 2223 | if (strglobmatch(ent->s, buf)) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2224 | ret = __del_trace_probe_event(fd, ent); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2225 | if (ret < 0) |
| 2226 | break; |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2227 | strlist__remove(namelist, ent); |
| 2228 | } |
| 2229 | } else { |
| 2230 | ent = strlist__find(namelist, buf); |
| 2231 | if (ent) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 2232 | ret = __del_trace_probe_event(fd, ent); |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2233 | if (ret >= 0) |
| 2234 | strlist__remove(namelist, ent); |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2235 | } |
| 2236 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2237 | |
| 2238 | return ret; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2239 | } |
| 2240 | |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2241 | int del_perf_probe_events(struct strlist *dellist) |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2242 | { |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2243 | int ret = -1, ufd = -1, kfd = -1; |
| 2244 | char buf[128]; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2245 | const char *group, *event; |
| 2246 | char *p, *str; |
| 2247 | struct str_node *ent; |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2248 | struct strlist *namelist = NULL, *unamelist = NULL; |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2249 | |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2250 | /* Get current event names */ |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2251 | kfd = open_kprobe_events(true); |
| 2252 | if (kfd < 0) |
| 2253 | return kfd; |
| 2254 | |
| 2255 | namelist = get_probe_trace_event_names(kfd, true); |
| 2256 | ufd = open_uprobe_events(true); |
| 2257 | |
| 2258 | if (ufd >= 0) |
| 2259 | unamelist = get_probe_trace_event_names(ufd, true); |
| 2260 | |
| 2261 | if (namelist == NULL && unamelist == NULL) |
| 2262 | goto error; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2263 | |
Masami Hiramatsu | adf365f | 2009-12-15 10:32:03 -0500 | [diff] [blame] | 2264 | strlist__for_each(ent, dellist) { |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2265 | str = strdup(ent->s); |
| 2266 | if (str == NULL) { |
| 2267 | ret = -ENOMEM; |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2268 | goto error; |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 2269 | } |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2270 | pr_debug("Parsing: %s\n", str); |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2271 | p = strchr(str, ':'); |
| 2272 | if (p) { |
| 2273 | group = str; |
| 2274 | *p = '\0'; |
| 2275 | event = p + 1; |
| 2276 | } else { |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2277 | group = "*"; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2278 | event = str; |
| 2279 | } |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2280 | |
| 2281 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
| 2282 | if (ret < 0) { |
| 2283 | pr_err("Failed to copy event."); |
| 2284 | free(str); |
| 2285 | goto error; |
| 2286 | } |
| 2287 | |
Masami Hiramatsu | bbbb521 | 2009-12-15 10:32:10 -0500 | [diff] [blame] | 2288 | pr_debug("Group: %s, Event: %s\n", group, event); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2289 | |
| 2290 | if (namelist) |
| 2291 | ret = del_trace_probe_event(kfd, buf, namelist); |
| 2292 | |
| 2293 | if (unamelist && ret != 0) |
| 2294 | ret = del_trace_probe_event(ufd, buf, unamelist); |
| 2295 | |
| 2296 | if (ret != 0) |
| 2297 | pr_info("Info: Event \"%s\" does not exist.\n", buf); |
| 2298 | |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2299 | free(str); |
| 2300 | } |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2301 | |
| 2302 | error: |
| 2303 | if (kfd >= 0) { |
Srikar Dronamraju | a23c4dc | 2012-05-31 17:16:43 +0530 | [diff] [blame] | 2304 | strlist__delete(namelist); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2305 | close(kfd); |
| 2306 | } |
| 2307 | |
| 2308 | if (ufd >= 0) { |
Srikar Dronamraju | a23c4dc | 2012-05-31 17:16:43 +0530 | [diff] [blame] | 2309 | strlist__delete(unamelist); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2310 | close(ufd); |
| 2311 | } |
Masami Hiramatsu | 146a143 | 2010-04-12 13:17:42 -0400 | [diff] [blame] | 2312 | |
| 2313 | return ret; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2314 | } |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2315 | |
Masami Hiramatsu | 3c42258 | 2011-01-20 23:15:45 +0900 | [diff] [blame] | 2316 | /* TODO: don't use a global variable for filter ... */ |
| 2317 | static struct strfilter *available_func_filter; |
Masami Hiramatsu | fa28244 | 2009-12-08 17:03:23 -0500 | [diff] [blame] | 2318 | |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 2319 | /* |
Masami Hiramatsu | 3c42258 | 2011-01-20 23:15:45 +0900 | [diff] [blame] | 2320 | * If a symbol corresponds to a function with global binding and |
| 2321 | * matches filter return 0. For all others return 1. |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 2322 | */ |
Irina Tirdea | 1d037ca | 2012-09-11 01:15:03 +0300 | [diff] [blame] | 2323 | static int filter_available_functions(struct map *map __maybe_unused, |
Masami Hiramatsu | 3c42258 | 2011-01-20 23:15:45 +0900 | [diff] [blame] | 2324 | struct symbol *sym) |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 2325 | { |
Masami Hiramatsu | 3c42258 | 2011-01-20 23:15:45 +0900 | [diff] [blame] | 2326 | if (sym->binding == STB_GLOBAL && |
| 2327 | strfilter__compare(available_func_filter, sym->name)) |
| 2328 | return 0; |
| 2329 | return 1; |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 2330 | } |
| 2331 | |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2332 | static int __show_available_funcs(struct map *map) |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 2333 | { |
Masami Hiramatsu | 3c42258 | 2011-01-20 23:15:45 +0900 | [diff] [blame] | 2334 | if (map__load(map, filter_available_functions)) { |
Masami Hiramatsu | e80711c | 2011-01-13 21:46:11 +0900 | [diff] [blame] | 2335 | pr_err("Failed to load map.\n"); |
| 2336 | return -EINVAL; |
| 2337 | } |
| 2338 | if (!dso__sorted_by_name(map->dso, map->type)) |
| 2339 | dso__sort_by_name(map->dso, map->type); |
| 2340 | |
| 2341 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); |
| 2342 | return 0; |
| 2343 | } |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2344 | |
| 2345 | static int available_kernel_funcs(const char *module) |
| 2346 | { |
| 2347 | struct map *map; |
| 2348 | int ret; |
| 2349 | |
| 2350 | ret = init_vmlinux(); |
| 2351 | if (ret < 0) |
| 2352 | return ret; |
| 2353 | |
| 2354 | map = kernel_get_module_map(module); |
| 2355 | if (!map) { |
| 2356 | pr_err("Failed to find %s map.\n", (module) ? : "kernel"); |
| 2357 | return -EINVAL; |
| 2358 | } |
| 2359 | return __show_available_funcs(map); |
| 2360 | } |
| 2361 | |
| 2362 | static int available_user_funcs(const char *target) |
| 2363 | { |
| 2364 | struct map *map; |
| 2365 | int ret; |
| 2366 | |
| 2367 | ret = init_user_exec(); |
| 2368 | if (ret < 0) |
| 2369 | return ret; |
| 2370 | |
| 2371 | map = dso__new_map(target); |
| 2372 | ret = __show_available_funcs(map); |
| 2373 | dso__delete(map->dso); |
| 2374 | map__delete(map); |
| 2375 | return ret; |
| 2376 | } |
| 2377 | |
| 2378 | int show_available_funcs(const char *target, struct strfilter *_filter, |
| 2379 | bool user) |
| 2380 | { |
| 2381 | setup_pager(); |
| 2382 | available_func_filter = _filter; |
| 2383 | |
| 2384 | if (!user) |
| 2385 | return available_kernel_funcs(target); |
| 2386 | |
| 2387 | return available_user_funcs(target); |
| 2388 | } |
| 2389 | |
| 2390 | /* |
| 2391 | * uprobe_events only accepts address: |
| 2392 | * Convert function and any offset to address |
| 2393 | */ |
| 2394 | static int convert_name_to_addr(struct perf_probe_event *pev, const char *exec) |
| 2395 | { |
| 2396 | struct perf_probe_point *pp = &pev->point; |
| 2397 | struct symbol *sym; |
| 2398 | struct map *map = NULL; |
Masami Hiramatsu | 8a613d4 | 2013-12-26 05:41:50 +0000 | [diff] [blame] | 2399 | char *function = NULL; |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2400 | int ret = -EINVAL; |
| 2401 | unsigned long long vaddr = 0; |
| 2402 | |
| 2403 | if (!pp->function) { |
| 2404 | pr_warning("No function specified for uprobes"); |
| 2405 | goto out; |
| 2406 | } |
| 2407 | |
| 2408 | function = strdup(pp->function); |
| 2409 | if (!function) { |
| 2410 | pr_warning("Failed to allocate memory by strdup.\n"); |
| 2411 | ret = -ENOMEM; |
| 2412 | goto out; |
| 2413 | } |
| 2414 | |
Masami Hiramatsu | 8a613d4 | 2013-12-26 05:41:50 +0000 | [diff] [blame] | 2415 | map = dso__new_map(exec); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2416 | if (!map) { |
| 2417 | pr_warning("Cannot find appropriate DSO for %s.\n", exec); |
| 2418 | goto out; |
| 2419 | } |
| 2420 | available_func_filter = strfilter__new(function, NULL); |
| 2421 | if (map__load(map, filter_available_functions)) { |
| 2422 | pr_err("Failed to load map.\n"); |
| 2423 | goto out; |
| 2424 | } |
| 2425 | |
| 2426 | sym = map__find_symbol_by_name(map, function, NULL); |
| 2427 | if (!sym) { |
| 2428 | pr_warning("Cannot find %s in DSO %s\n", function, exec); |
| 2429 | goto out; |
| 2430 | } |
| 2431 | |
| 2432 | if (map->start > sym->start) |
| 2433 | vaddr = map->start; |
| 2434 | vaddr += sym->start + pp->offset + map->pgoff; |
| 2435 | pp->offset = 0; |
| 2436 | |
| 2437 | if (!pev->event) { |
| 2438 | pev->event = function; |
| 2439 | function = NULL; |
| 2440 | } |
| 2441 | if (!pev->group) { |
David Ahern | 1fb8944 | 2012-09-08 09:06:51 -0600 | [diff] [blame] | 2442 | char *ptr1, *ptr2, *exec_copy; |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2443 | |
| 2444 | pev->group = zalloc(sizeof(char *) * 64); |
David Ahern | 1fb8944 | 2012-09-08 09:06:51 -0600 | [diff] [blame] | 2445 | exec_copy = strdup(exec); |
| 2446 | if (!exec_copy) { |
| 2447 | ret = -ENOMEM; |
| 2448 | pr_warning("Failed to copy exec string.\n"); |
| 2449 | goto out; |
| 2450 | } |
| 2451 | |
| 2452 | ptr1 = strdup(basename(exec_copy)); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2453 | if (ptr1) { |
| 2454 | ptr2 = strpbrk(ptr1, "-._"); |
| 2455 | if (ptr2) |
| 2456 | *ptr2 = '\0'; |
| 2457 | e_snprintf(pev->group, 64, "%s_%s", PERFPROBE_GROUP, |
| 2458 | ptr1); |
| 2459 | free(ptr1); |
| 2460 | } |
David Ahern | 1fb8944 | 2012-09-08 09:06:51 -0600 | [diff] [blame] | 2461 | free(exec_copy); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2462 | } |
| 2463 | free(pp->function); |
| 2464 | pp->function = zalloc(sizeof(char *) * MAX_PROBE_ARGS); |
| 2465 | if (!pp->function) { |
| 2466 | ret = -ENOMEM; |
| 2467 | pr_warning("Failed to allocate memory by zalloc.\n"); |
| 2468 | goto out; |
| 2469 | } |
| 2470 | e_snprintf(pp->function, MAX_PROBE_ARGS, "0x%llx", vaddr); |
| 2471 | ret = 0; |
| 2472 | |
| 2473 | out: |
| 2474 | if (map) { |
| 2475 | dso__delete(map->dso); |
| 2476 | map__delete(map); |
| 2477 | } |
| 2478 | if (function) |
| 2479 | free(function); |
Srikar Dronamraju | 225466f | 2012-04-16 17:39:09 +0530 | [diff] [blame] | 2480 | return ret; |
| 2481 | } |