Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1 | /* |
| 2 | * probe-finder.c : C expression to kprobe event converter |
| 3 | * |
| 4 | * Written by Masami Hiramatsu <mhiramat@redhat.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #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 <getopt.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | #include <stdarg.h> |
| 33 | #include <ctype.h> |
Masami Hiramatsu | 074fc0e | 2009-10-16 20:08:01 -0400 | [diff] [blame] | 34 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 35 | #include "string.h" |
Masami Hiramatsu | 89c69c0 | 2009-10-16 20:08:10 -0400 | [diff] [blame] | 36 | #include "event.h" |
| 37 | #include "debug.h" |
Masami Hiramatsu | 074fc0e | 2009-10-16 20:08:01 -0400 | [diff] [blame] | 38 | #include "util.h" |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 39 | #include "probe-finder.h" |
| 40 | |
| 41 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 42 | /* |
| 43 | * Generic dwarf analysis helpers |
| 44 | */ |
| 45 | |
| 46 | #define X86_32_MAX_REGS 8 |
| 47 | const char *x86_32_regs_table[X86_32_MAX_REGS] = { |
| 48 | "%ax", |
| 49 | "%cx", |
| 50 | "%dx", |
| 51 | "%bx", |
| 52 | "$stack", /* Stack address instead of %sp */ |
| 53 | "%bp", |
| 54 | "%si", |
| 55 | "%di", |
| 56 | }; |
| 57 | |
| 58 | #define X86_64_MAX_REGS 16 |
| 59 | const char *x86_64_regs_table[X86_64_MAX_REGS] = { |
| 60 | "%ax", |
| 61 | "%dx", |
| 62 | "%cx", |
| 63 | "%bx", |
| 64 | "%si", |
| 65 | "%di", |
| 66 | "%bp", |
| 67 | "%sp", |
| 68 | "%r8", |
| 69 | "%r9", |
| 70 | "%r10", |
| 71 | "%r11", |
| 72 | "%r12", |
| 73 | "%r13", |
| 74 | "%r14", |
| 75 | "%r15", |
| 76 | }; |
| 77 | |
| 78 | /* TODO: switching by dwarf address size */ |
| 79 | #ifdef __x86_64__ |
| 80 | #define ARCH_MAX_REGS X86_64_MAX_REGS |
| 81 | #define arch_regs_table x86_64_regs_table |
| 82 | #else |
| 83 | #define ARCH_MAX_REGS X86_32_MAX_REGS |
| 84 | #define arch_regs_table x86_32_regs_table |
| 85 | #endif |
| 86 | |
| 87 | /* Return architecture dependent register string (for kprobe-tracer) */ |
| 88 | static const char *get_arch_regstr(unsigned int n) |
| 89 | { |
| 90 | return (n <= ARCH_MAX_REGS) ? arch_regs_table[n] : NULL; |
| 91 | } |
| 92 | |
| 93 | /* |
| 94 | * Compare the tail of two strings. |
| 95 | * Return 0 if whole of either string is same as another's tail part. |
| 96 | */ |
| 97 | static int strtailcmp(const char *s1, const char *s2) |
| 98 | { |
| 99 | int i1 = strlen(s1); |
| 100 | int i2 = strlen(s2); |
Juha Leppanen | d56728b | 2009-12-07 12:00:40 -0500 | [diff] [blame] | 101 | while (--i1 >= 0 && --i2 >= 0) { |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 102 | if (s1[i1] != s2[i2]) |
| 103 | return s1[i1] - s2[i2]; |
| 104 | } |
| 105 | return 0; |
| 106 | } |
| 107 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 108 | /* Line number list operations */ |
| 109 | |
| 110 | /* Add a line to line number list */ |
| 111 | static void line_list__add_line(struct list_head *head, unsigned int line) |
| 112 | { |
| 113 | struct line_node *ln; |
| 114 | struct list_head *p; |
| 115 | |
| 116 | /* Reverse search, because new line will be the last one */ |
| 117 | list_for_each_entry_reverse(ln, head, list) { |
| 118 | if (ln->line < line) { |
| 119 | p = &ln->list; |
| 120 | goto found; |
| 121 | } else if (ln->line == line) /* Already exist */ |
| 122 | return ; |
| 123 | } |
| 124 | /* List is empty, or the smallest entry */ |
| 125 | p = head; |
| 126 | found: |
| 127 | pr_debug("line list: add a line %u\n", line); |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 128 | ln = xzalloc(sizeof(struct line_node)); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 129 | ln->line = line; |
| 130 | INIT_LIST_HEAD(&ln->list); |
| 131 | list_add(&ln->list, p); |
| 132 | } |
| 133 | |
| 134 | /* Check if the line in line number list */ |
| 135 | static int line_list__has_line(struct list_head *head, unsigned int line) |
| 136 | { |
| 137 | struct line_node *ln; |
| 138 | |
| 139 | /* Reverse search, because new line will be the last one */ |
| 140 | list_for_each_entry(ln, head, list) |
| 141 | if (ln->line == line) |
| 142 | return 1; |
| 143 | |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | /* Init line number list */ |
| 148 | static void line_list__init(struct list_head *head) |
| 149 | { |
| 150 | INIT_LIST_HEAD(head); |
| 151 | } |
| 152 | |
| 153 | /* Free line number list */ |
| 154 | static void line_list__free(struct list_head *head) |
| 155 | { |
| 156 | struct line_node *ln; |
| 157 | while (!list_empty(head)) { |
| 158 | ln = list_first_entry(head, struct line_node, list); |
| 159 | list_del(&ln->list); |
| 160 | free(ln); |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | /* Dwarf wrappers */ |
| 165 | |
| 166 | /* Find the realpath of the target file. */ |
| 167 | static const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 168 | { |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 169 | Dwarf_Files *files; |
| 170 | size_t nfiles, i; |
Arnaldo Carvalho de Melo | accd3cc | 2010-03-05 12:51:04 -0300 | [diff] [blame] | 171 | const char *src = NULL; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 172 | int ret; |
| 173 | |
| 174 | if (!fname) |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 175 | return NULL; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 176 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 177 | ret = dwarf_getsrcfiles(cu_die, &files, &nfiles); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 178 | if (ret != 0) |
| 179 | return NULL; |
| 180 | |
| 181 | for (i = 0; i < nfiles; i++) { |
| 182 | src = dwarf_filesrc(files, i, NULL, NULL); |
| 183 | if (strtailcmp(src, fname) == 0) |
| 184 | break; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 185 | } |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 186 | return src; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 187 | } |
| 188 | |
Masami Hiramatsu | 016f262 | 2010-03-16 18:05:58 -0400 | [diff] [blame] | 189 | /* Compare diename and tname */ |
| 190 | static bool die_compare_name(Dwarf_Die *dw_die, const char *tname) |
| 191 | { |
| 192 | const char *name; |
| 193 | name = dwarf_diename(dw_die); |
| 194 | DIE_IF(name == NULL); |
| 195 | return strcmp(tname, name); |
| 196 | } |
| 197 | |
| 198 | /* Get entry pc(or low pc, 1st entry of ranges) of the die */ |
| 199 | static Dwarf_Addr die_get_entrypc(Dwarf_Die *dw_die) |
| 200 | { |
| 201 | Dwarf_Addr epc; |
| 202 | int ret; |
| 203 | |
| 204 | ret = dwarf_entrypc(dw_die, &epc); |
| 205 | DIE_IF(ret == -1); |
| 206 | return epc; |
| 207 | } |
| 208 | |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame^] | 209 | /* Get type die, but skip qualifiers and typedef */ |
| 210 | static Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem) |
| 211 | { |
| 212 | Dwarf_Attribute attr; |
| 213 | int tag; |
| 214 | |
| 215 | do { |
| 216 | if (dwarf_attr(vr_die, DW_AT_type, &attr) == NULL || |
| 217 | dwarf_formref_die(&attr, die_mem) == NULL) |
| 218 | return NULL; |
| 219 | |
| 220 | tag = dwarf_tag(die_mem); |
| 221 | vr_die = die_mem; |
| 222 | } while (tag == DW_TAG_const_type || |
| 223 | tag == DW_TAG_restrict_type || |
| 224 | tag == DW_TAG_volatile_type || |
| 225 | tag == DW_TAG_shared_type || |
| 226 | tag == DW_TAG_typedef); |
| 227 | |
| 228 | return die_mem; |
| 229 | } |
| 230 | |
Masami Hiramatsu | 016f262 | 2010-03-16 18:05:58 -0400 | [diff] [blame] | 231 | /* Return values for die_find callbacks */ |
| 232 | enum { |
| 233 | DIE_FIND_CB_FOUND = 0, /* End of Search */ |
| 234 | DIE_FIND_CB_CHILD = 1, /* Search only children */ |
| 235 | DIE_FIND_CB_SIBLING = 2, /* Search only siblings */ |
| 236 | DIE_FIND_CB_CONTINUE = 3, /* Search children and siblings */ |
| 237 | }; |
| 238 | |
| 239 | /* Search a child die */ |
| 240 | static Dwarf_Die *die_find_child(Dwarf_Die *rt_die, |
| 241 | int (*callback)(Dwarf_Die *, void *), |
| 242 | void *data, Dwarf_Die *die_mem) |
| 243 | { |
| 244 | Dwarf_Die child_die; |
| 245 | int ret; |
| 246 | |
| 247 | ret = dwarf_child(rt_die, die_mem); |
| 248 | if (ret != 0) |
| 249 | return NULL; |
| 250 | |
| 251 | do { |
| 252 | ret = callback(die_mem, data); |
| 253 | if (ret == DIE_FIND_CB_FOUND) |
| 254 | return die_mem; |
| 255 | |
| 256 | if ((ret & DIE_FIND_CB_CHILD) && |
| 257 | die_find_child(die_mem, callback, data, &child_die)) { |
| 258 | memcpy(die_mem, &child_die, sizeof(Dwarf_Die)); |
| 259 | return die_mem; |
| 260 | } |
| 261 | } while ((ret & DIE_FIND_CB_SIBLING) && |
| 262 | dwarf_siblingof(die_mem, die_mem) == 0); |
| 263 | |
| 264 | return NULL; |
| 265 | } |
| 266 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 267 | struct __addr_die_search_param { |
| 268 | Dwarf_Addr addr; |
| 269 | Dwarf_Die *die_mem; |
| 270 | }; |
| 271 | |
| 272 | static int __die_search_func_cb(Dwarf_Die *fn_die, void *data) |
| 273 | { |
| 274 | struct __addr_die_search_param *ad = data; |
| 275 | |
| 276 | if (dwarf_tag(fn_die) == DW_TAG_subprogram && |
| 277 | dwarf_haspc(fn_die, ad->addr)) { |
| 278 | memcpy(ad->die_mem, fn_die, sizeof(Dwarf_Die)); |
| 279 | return DWARF_CB_ABORT; |
| 280 | } |
| 281 | return DWARF_CB_OK; |
| 282 | } |
| 283 | |
| 284 | /* Search a real subprogram including this line, */ |
Masami Hiramatsu | 95a3e4c | 2010-03-16 18:05:51 -0400 | [diff] [blame] | 285 | static Dwarf_Die *die_find_real_subprogram(Dwarf_Die *cu_die, Dwarf_Addr addr, |
| 286 | Dwarf_Die *die_mem) |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 287 | { |
| 288 | struct __addr_die_search_param ad; |
| 289 | ad.addr = addr; |
| 290 | ad.die_mem = die_mem; |
| 291 | /* dwarf_getscopes can't find subprogram. */ |
| 292 | if (!dwarf_getfuncs(cu_die, __die_search_func_cb, &ad, 0)) |
| 293 | return NULL; |
| 294 | else |
| 295 | return die_mem; |
| 296 | } |
| 297 | |
Masami Hiramatsu | 016f262 | 2010-03-16 18:05:58 -0400 | [diff] [blame] | 298 | /* die_find callback for inline function search */ |
| 299 | static int __die_find_inline_cb(Dwarf_Die *die_mem, void *data) |
| 300 | { |
| 301 | Dwarf_Addr *addr = data; |
| 302 | |
| 303 | if (dwarf_tag(die_mem) == DW_TAG_inlined_subroutine && |
| 304 | dwarf_haspc(die_mem, *addr)) |
| 305 | return DIE_FIND_CB_FOUND; |
| 306 | |
| 307 | return DIE_FIND_CB_CONTINUE; |
| 308 | } |
| 309 | |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 310 | /* Similar to dwarf_getfuncs, but returns inlined_subroutine if exists. */ |
Masami Hiramatsu | 95a3e4c | 2010-03-16 18:05:51 -0400 | [diff] [blame] | 311 | static Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr, |
| 312 | Dwarf_Die *die_mem) |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 313 | { |
Masami Hiramatsu | 016f262 | 2010-03-16 18:05:58 -0400 | [diff] [blame] | 314 | return die_find_child(sp_die, __die_find_inline_cb, &addr, die_mem); |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 315 | } |
| 316 | |
Masami Hiramatsu | 016f262 | 2010-03-16 18:05:58 -0400 | [diff] [blame] | 317 | static int __die_find_variable_cb(Dwarf_Die *die_mem, void *data) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 318 | { |
Masami Hiramatsu | 016f262 | 2010-03-16 18:05:58 -0400 | [diff] [blame] | 319 | const char *name = data; |
| 320 | int tag; |
| 321 | |
| 322 | tag = dwarf_tag(die_mem); |
| 323 | if ((tag == DW_TAG_formal_parameter || |
| 324 | tag == DW_TAG_variable) && |
| 325 | (die_compare_name(die_mem, name) == 0)) |
| 326 | return DIE_FIND_CB_FOUND; |
| 327 | |
| 328 | return DIE_FIND_CB_CONTINUE; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 329 | } |
| 330 | |
Masami Hiramatsu | 016f262 | 2010-03-16 18:05:58 -0400 | [diff] [blame] | 331 | /* Find a variable called 'name' */ |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 332 | static Dwarf_Die *die_find_variable(Dwarf_Die *sp_die, const char *name, |
| 333 | Dwarf_Die *die_mem) |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 334 | { |
Masami Hiramatsu | 016f262 | 2010-03-16 18:05:58 -0400 | [diff] [blame] | 335 | return die_find_child(sp_die, __die_find_variable_cb, (void *)name, |
| 336 | die_mem); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 337 | } |
| 338 | |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame^] | 339 | static int __die_find_member_cb(Dwarf_Die *die_mem, void *data) |
| 340 | { |
| 341 | const char *name = data; |
| 342 | |
| 343 | if ((dwarf_tag(die_mem) == DW_TAG_member) && |
| 344 | (die_compare_name(die_mem, name) == 0)) |
| 345 | return DIE_FIND_CB_FOUND; |
| 346 | |
| 347 | return DIE_FIND_CB_SIBLING; |
| 348 | } |
| 349 | |
| 350 | /* Find a member called 'name' */ |
| 351 | static Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name, |
| 352 | Dwarf_Die *die_mem) |
| 353 | { |
| 354 | return die_find_child(st_die, __die_find_member_cb, (void *)name, |
| 355 | die_mem); |
| 356 | } |
| 357 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 358 | /* |
| 359 | * Probe finder related functions |
| 360 | */ |
| 361 | |
| 362 | /* Show a location */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 363 | static void convert_location(Dwarf_Op *op, struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 364 | { |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 365 | unsigned int regn; |
| 366 | Dwarf_Word offs = 0; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 367 | bool ref = false; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 368 | const char *regs; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 369 | struct kprobe_trace_arg *tvar = pf->tvar; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 370 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 371 | /* TODO: support CFA */ |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 372 | /* If this is based on frame buffer, set the offset */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 373 | if (op->atom == DW_OP_fbreg) { |
| 374 | if (pf->fb_ops == NULL) |
| 375 | die("The attribute of frame base is not supported.\n"); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 376 | ref = true; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 377 | offs = op->number; |
| 378 | op = &pf->fb_ops[0]; |
| 379 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 380 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 381 | if (op->atom >= DW_OP_breg0 && op->atom <= DW_OP_breg31) { |
| 382 | regn = op->atom - DW_OP_breg0; |
| 383 | offs += op->number; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 384 | ref = true; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 385 | } else if (op->atom >= DW_OP_reg0 && op->atom <= DW_OP_reg31) { |
| 386 | regn = op->atom - DW_OP_reg0; |
| 387 | } else if (op->atom == DW_OP_bregx) { |
| 388 | regn = op->number; |
| 389 | offs += op->number2; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 390 | ref = true; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 391 | } else if (op->atom == DW_OP_regx) { |
| 392 | regn = op->number; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 393 | } else |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 394 | die("DW_OP %d is not supported.", op->atom); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 395 | |
| 396 | regs = get_arch_regstr(regn); |
| 397 | if (!regs) |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 398 | die("%u exceeds max register number.", regn); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 399 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 400 | tvar->value = xstrdup(regs); |
| 401 | if (ref) { |
| 402 | tvar->ref = xzalloc(sizeof(struct kprobe_trace_arg_ref)); |
| 403 | tvar->ref->offset = (long)offs; |
| 404 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 405 | } |
| 406 | |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame^] | 407 | static void convert_variable_fields(Dwarf_Die *vr_die, const char *varname, |
| 408 | struct perf_probe_arg_field *field, |
| 409 | struct kprobe_trace_arg_ref **ref_ptr) |
| 410 | { |
| 411 | struct kprobe_trace_arg_ref *ref = *ref_ptr; |
| 412 | Dwarf_Attribute attr; |
| 413 | Dwarf_Die member; |
| 414 | Dwarf_Die type; |
| 415 | Dwarf_Word offs; |
| 416 | |
| 417 | pr_debug("converting %s in %s\n", field->name, varname); |
| 418 | if (die_get_real_type(vr_die, &type) == NULL) |
| 419 | die("Failed to get a type information of %s.", varname); |
| 420 | |
| 421 | /* Check the pointer and dereference */ |
| 422 | if (dwarf_tag(&type) == DW_TAG_pointer_type) { |
| 423 | if (!field->ref) |
| 424 | die("Semantic error: %s must be referred by '->'", |
| 425 | field->name); |
| 426 | /* Get the type pointed by this pointer */ |
| 427 | if (die_get_real_type(&type, &type) == NULL) |
| 428 | die("Failed to get a type information of %s.", varname); |
| 429 | |
| 430 | ref = xzalloc(sizeof(struct kprobe_trace_arg_ref)); |
| 431 | if (*ref_ptr) |
| 432 | (*ref_ptr)->next = ref; |
| 433 | else |
| 434 | *ref_ptr = ref; |
| 435 | } else { |
| 436 | if (field->ref) |
| 437 | die("Semantic error: %s must be referred by '.'", |
| 438 | field->name); |
| 439 | if (!ref) |
| 440 | die("Structure on a register is not supported yet."); |
| 441 | } |
| 442 | |
| 443 | /* Verify it is a data structure */ |
| 444 | if (dwarf_tag(&type) != DW_TAG_structure_type) |
| 445 | die("%s is not a data structure.", varname); |
| 446 | |
| 447 | if (die_find_member(&type, field->name, &member) == NULL) |
| 448 | die("%s(tyep:%s) has no member %s.", varname, |
| 449 | dwarf_diename(&type), field->name); |
| 450 | |
| 451 | /* Get the offset of the field */ |
| 452 | if (dwarf_attr(&member, DW_AT_data_member_location, &attr) == NULL || |
| 453 | dwarf_formudata(&attr, &offs) != 0) |
| 454 | die("Failed to get the offset of %s.", field->name); |
| 455 | ref->offset += (long)offs; |
| 456 | |
| 457 | /* Converting next field */ |
| 458 | if (field->next) |
| 459 | convert_variable_fields(&member, field->name, field->next, |
| 460 | &ref); |
| 461 | } |
| 462 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 463 | /* Show a variables in kprobe event format */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 464 | static void convert_variable(Dwarf_Die *vr_die, struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 465 | { |
| 466 | Dwarf_Attribute attr; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 467 | Dwarf_Op *expr; |
| 468 | size_t nexpr; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 469 | int ret; |
| 470 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 471 | if (dwarf_attr(vr_die, DW_AT_location, &attr) == NULL) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 472 | goto error; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 473 | /* TODO: handle more than 1 exprs */ |
Masami Hiramatsu | d0cb426 | 2010-03-15 13:02:35 -0400 | [diff] [blame] | 474 | ret = dwarf_getlocation_addr(&attr, pf->addr, &expr, &nexpr, 1); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 475 | if (ret <= 0 || nexpr == 0) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 476 | goto error; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 477 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 478 | convert_location(expr, pf); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame^] | 479 | |
| 480 | if (pf->pvar->field) |
| 481 | convert_variable_fields(vr_die, pf->pvar->name, |
| 482 | pf->pvar->field, &pf->tvar->ref); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 483 | /* *expr will be cached in libdw. Don't free it. */ |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 484 | return ; |
| 485 | error: |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 486 | /* TODO: Support const_value */ |
Masami Hiramatsu | 074fc0e | 2009-10-16 20:08:01 -0400 | [diff] [blame] | 487 | die("Failed to find the location of %s at this address.\n" |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 488 | " Perhaps, it has been optimized out.", pf->pvar->name); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 489 | } |
| 490 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 491 | /* Find a variable in a subprogram die */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 492 | static void find_variable(Dwarf_Die *sp_die, struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 493 | { |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 494 | Dwarf_Die vr_die; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame^] | 495 | char buf[128]; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 496 | |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 497 | /* TODO: Support struct members and arrays */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 498 | if (!is_c_varname(pf->pvar->name)) { |
| 499 | /* Copy raw parameters */ |
| 500 | pf->tvar->value = xstrdup(pf->pvar->name); |
| 501 | } else { |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame^] | 502 | synthesize_perf_probe_arg(pf->pvar, buf, 128); |
| 503 | pf->tvar->name = xstrdup(buf); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 504 | pr_debug("Searching '%s' variable in context.\n", |
| 505 | pf->pvar->name); |
| 506 | /* Search child die for local variables and parameters. */ |
| 507 | if (!die_find_variable(sp_die, pf->pvar->name, &vr_die)) |
| 508 | die("Failed to find '%s' in this function.", |
| 509 | pf->pvar->name); |
| 510 | convert_variable(&vr_die, pf); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 511 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 512 | } |
| 513 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 514 | /* Show a probe point to output buffer */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 515 | static void convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 516 | { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 517 | struct kprobe_trace_event *tev; |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 518 | Dwarf_Addr eaddr; |
| 519 | Dwarf_Die die_mem; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 520 | const char *name; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 521 | int ret, i; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 522 | Dwarf_Attribute fb_attr; |
| 523 | size_t nops; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 524 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 525 | if (pf->ntevs == MAX_PROBES) |
| 526 | die("Too many( > %d) probe point found.\n", MAX_PROBES); |
| 527 | tev = &pf->tevs[pf->ntevs++]; |
| 528 | |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 529 | /* If no real subprogram, find a real one */ |
| 530 | if (!sp_die || dwarf_tag(sp_die) != DW_TAG_subprogram) { |
Masami Hiramatsu | 95a3e4c | 2010-03-16 18:05:51 -0400 | [diff] [blame] | 531 | sp_die = die_find_real_subprogram(&pf->cu_die, |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 532 | pf->addr, &die_mem); |
| 533 | if (!sp_die) |
| 534 | die("Probe point is not found in subprograms."); |
| 535 | } |
| 536 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 537 | /* Copy the name of probe point */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 538 | name = dwarf_diename(sp_die); |
| 539 | if (name) { |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 540 | dwarf_entrypc(sp_die, &eaddr); |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 541 | tev->point.symbol = xstrdup(name); |
| 542 | tev->point.offset = (unsigned long)(pf->addr - eaddr); |
| 543 | } else |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 544 | /* This function has no name. */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 545 | tev->point.offset = (unsigned long)pf->addr; |
| 546 | |
| 547 | pr_debug("Probe point found: %s+%lu\n", tev->point.symbol, |
| 548 | tev->point.offset); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 549 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 550 | /* Get the frame base attribute/ops */ |
| 551 | dwarf_attr(sp_die, DW_AT_frame_base, &fb_attr); |
Masami Hiramatsu | d0cb426 | 2010-03-15 13:02:35 -0400 | [diff] [blame] | 552 | ret = dwarf_getlocation_addr(&fb_attr, pf->addr, &pf->fb_ops, &nops, 1); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 553 | if (ret <= 0 || nops == 0) |
| 554 | pf->fb_ops = NULL; |
| 555 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 556 | /* Find each argument */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 557 | /* TODO: use dwarf_cfi_addrframe */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 558 | tev->nargs = pf->pev->nargs; |
| 559 | tev->args = xzalloc(sizeof(struct kprobe_trace_arg) * tev->nargs); |
| 560 | for (i = 0; i < pf->pev->nargs; i++) { |
| 561 | pf->pvar = &pf->pev->args[i]; |
| 562 | pf->tvar = &tev->args[i]; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 563 | find_variable(sp_die, pf); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 564 | } |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 565 | |
| 566 | /* *pf->fb_ops will be cached in libdw. Don't free it. */ |
| 567 | pf->fb_ops = NULL; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 568 | } |
| 569 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 570 | /* Find probe point from its line number */ |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 571 | static void find_probe_point_by_line(struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 572 | { |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 573 | Dwarf_Lines *lines; |
| 574 | Dwarf_Line *line; |
| 575 | size_t nlines, i; |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 576 | Dwarf_Addr addr; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 577 | int lineno; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 578 | int ret; |
| 579 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 580 | ret = dwarf_getsrclines(&pf->cu_die, &lines, &nlines); |
| 581 | DIE_IF(ret != 0); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 582 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 583 | for (i = 0; i < nlines; i++) { |
| 584 | line = dwarf_onesrcline(lines, i); |
| 585 | dwarf_lineno(line, &lineno); |
Masami Hiramatsu | b0ef073 | 2009-10-27 16:43:19 -0400 | [diff] [blame] | 586 | if (lineno != pf->lno) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 587 | continue; |
| 588 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 589 | /* TODO: Get fileno from line, but how? */ |
| 590 | if (strtailcmp(dwarf_linesrc(line, NULL, NULL), pf->fname) != 0) |
| 591 | continue; |
Masami Hiramatsu | b0ef073 | 2009-10-27 16:43:19 -0400 | [diff] [blame] | 592 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 593 | ret = dwarf_lineaddr(line, &addr); |
| 594 | DIE_IF(ret != 0); |
| 595 | pr_debug("Probe line found: line[%d]:%d addr:0x%jx\n", |
| 596 | (int)i, lineno, (uintmax_t)addr); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 597 | pf->addr = addr; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 598 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 599 | convert_probe_point(NULL, pf); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 600 | /* Continuing, because target line might be inlined. */ |
| 601 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 602 | } |
| 603 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 604 | /* Find lines which match lazy pattern */ |
| 605 | static int find_lazy_match_lines(struct list_head *head, |
| 606 | const char *fname, const char *pat) |
| 607 | { |
| 608 | char *fbuf, *p1, *p2; |
| 609 | int fd, line, nlines = 0; |
| 610 | struct stat st; |
| 611 | |
| 612 | fd = open(fname, O_RDONLY); |
| 613 | if (fd < 0) |
| 614 | die("failed to open %s", fname); |
| 615 | DIE_IF(fstat(fd, &st) < 0); |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 616 | fbuf = xmalloc(st.st_size + 2); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 617 | DIE_IF(read(fd, fbuf, st.st_size) < 0); |
| 618 | close(fd); |
| 619 | fbuf[st.st_size] = '\n'; /* Dummy line */ |
| 620 | fbuf[st.st_size + 1] = '\0'; |
| 621 | p1 = fbuf; |
| 622 | line = 1; |
| 623 | while ((p2 = strchr(p1, '\n')) != NULL) { |
| 624 | *p2 = '\0'; |
| 625 | if (strlazymatch(p1, pat)) { |
| 626 | line_list__add_line(head, line); |
| 627 | nlines++; |
| 628 | } |
| 629 | line++; |
| 630 | p1 = p2 + 1; |
| 631 | } |
| 632 | free(fbuf); |
| 633 | return nlines; |
| 634 | } |
| 635 | |
| 636 | /* Find probe points from lazy pattern */ |
| 637 | static void find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *pf) |
| 638 | { |
| 639 | Dwarf_Lines *lines; |
| 640 | Dwarf_Line *line; |
| 641 | size_t nlines, i; |
| 642 | Dwarf_Addr addr; |
| 643 | Dwarf_Die die_mem; |
| 644 | int lineno; |
| 645 | int ret; |
| 646 | |
| 647 | if (list_empty(&pf->lcache)) { |
| 648 | /* Matching lazy line pattern */ |
| 649 | ret = find_lazy_match_lines(&pf->lcache, pf->fname, |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 650 | pf->pev->point.lazy_line); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 651 | if (ret <= 0) |
| 652 | die("No matched lines found in %s.", pf->fname); |
| 653 | } |
| 654 | |
| 655 | ret = dwarf_getsrclines(&pf->cu_die, &lines, &nlines); |
| 656 | DIE_IF(ret != 0); |
| 657 | for (i = 0; i < nlines; i++) { |
| 658 | line = dwarf_onesrcline(lines, i); |
| 659 | |
| 660 | dwarf_lineno(line, &lineno); |
| 661 | if (!line_list__has_line(&pf->lcache, lineno)) |
| 662 | continue; |
| 663 | |
| 664 | /* TODO: Get fileno from line, but how? */ |
| 665 | if (strtailcmp(dwarf_linesrc(line, NULL, NULL), pf->fname) != 0) |
| 666 | continue; |
| 667 | |
| 668 | ret = dwarf_lineaddr(line, &addr); |
| 669 | DIE_IF(ret != 0); |
| 670 | if (sp_die) { |
| 671 | /* Address filtering 1: does sp_die include addr? */ |
| 672 | if (!dwarf_haspc(sp_die, addr)) |
| 673 | continue; |
| 674 | /* Address filtering 2: No child include addr? */ |
Masami Hiramatsu | 95a3e4c | 2010-03-16 18:05:51 -0400 | [diff] [blame] | 675 | if (die_find_inlinefunc(sp_die, addr, &die_mem)) |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 676 | continue; |
| 677 | } |
| 678 | |
| 679 | pr_debug("Probe line found: line[%d]:%d addr:0x%llx\n", |
| 680 | (int)i, lineno, (unsigned long long)addr); |
| 681 | pf->addr = addr; |
| 682 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 683 | convert_probe_point(sp_die, pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 684 | /* Continuing, because target line might be inlined. */ |
| 685 | } |
| 686 | /* TODO: deallocate lines, but how? */ |
| 687 | } |
| 688 | |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 689 | static int probe_point_inline_cb(Dwarf_Die *in_die, void *data) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 690 | { |
| 691 | struct probe_finder *pf = (struct probe_finder *)data; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 692 | struct perf_probe_point *pp = &pf->pev->point; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 693 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 694 | if (pp->lazy_line) |
| 695 | find_probe_point_lazy(in_die, pf); |
| 696 | else { |
| 697 | /* Get probe address */ |
| 698 | pf->addr = die_get_entrypc(in_die); |
| 699 | pf->addr += pp->offset; |
| 700 | pr_debug("found inline addr: 0x%jx\n", |
| 701 | (uintmax_t)pf->addr); |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 702 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 703 | convert_probe_point(in_die, pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 704 | } |
| 705 | |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 706 | return DWARF_CB_OK; |
| 707 | } |
| 708 | |
| 709 | /* Search function from function name */ |
| 710 | static int probe_point_search_cb(Dwarf_Die *sp_die, void *data) |
| 711 | { |
| 712 | struct probe_finder *pf = (struct probe_finder *)data; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 713 | struct perf_probe_point *pp = &pf->pev->point; |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 714 | |
| 715 | /* Check tag and diename */ |
| 716 | if (dwarf_tag(sp_die) != DW_TAG_subprogram || |
| 717 | die_compare_name(sp_die, pp->function) != 0) |
| 718 | return 0; |
| 719 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 720 | pf->fname = dwarf_decl_file(sp_die); |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 721 | if (pp->line) { /* Function relative line */ |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 722 | dwarf_decl_line(sp_die, &pf->lno); |
| 723 | pf->lno += pp->line; |
| 724 | find_probe_point_by_line(pf); |
| 725 | } else if (!dwarf_func_inline(sp_die)) { |
| 726 | /* Real function */ |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 727 | if (pp->lazy_line) |
| 728 | find_probe_point_lazy(sp_die, pf); |
| 729 | else { |
| 730 | pf->addr = die_get_entrypc(sp_die); |
| 731 | pf->addr += pp->offset; |
| 732 | /* TODO: Check the address in this function */ |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 733 | convert_probe_point(sp_die, pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 734 | } |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 735 | } else |
| 736 | /* Inlined function: search instances */ |
| 737 | dwarf_func_inline_instances(sp_die, probe_point_inline_cb, pf); |
| 738 | |
| 739 | return 1; /* Exit; no same symbol in this CU. */ |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 740 | } |
| 741 | |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 742 | static void find_probe_point_by_func(struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 743 | { |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 744 | dwarf_getfuncs(&pf->cu_die, probe_point_search_cb, pf, 0); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 745 | } |
| 746 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 747 | /* Find kprobe_trace_events specified by perf_probe_event from debuginfo */ |
| 748 | int find_kprobe_trace_events(int fd, struct perf_probe_event *pev, |
| 749 | struct kprobe_trace_event **tevs) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 750 | { |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 751 | struct probe_finder pf = {.pev = pev}; |
| 752 | struct perf_probe_point *pp = &pev->point; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 753 | Dwarf_Off off, noff; |
| 754 | size_t cuhl; |
| 755 | Dwarf_Die *diep; |
| 756 | Dwarf *dbg; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 757 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 758 | pf.tevs = xzalloc(sizeof(struct kprobe_trace_event) * MAX_PROBES); |
| 759 | *tevs = pf.tevs; |
| 760 | pf.ntevs = 0; |
| 761 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 762 | dbg = dwarf_begin(fd, DWARF_C_READ); |
| 763 | if (!dbg) |
Masami Hiramatsu | a225a1d | 2009-11-03 19:12:30 -0500 | [diff] [blame] | 764 | return -ENOENT; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 765 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 766 | off = 0; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 767 | line_list__init(&pf.lcache); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 768 | /* Loop on CUs (Compilation Unit) */ |
| 769 | while (!dwarf_nextcu(dbg, off, &noff, &cuhl, NULL, NULL, NULL)) { |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 770 | /* Get the DIE(Debugging Information Entry) of this CU */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 771 | diep = dwarf_offdie(dbg, off + cuhl, &pf.cu_die); |
| 772 | if (!diep) |
| 773 | continue; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 774 | |
| 775 | /* Check if target file is included. */ |
| 776 | if (pp->file) |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 777 | pf.fname = cu_find_realpath(&pf.cu_die, pp->file); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 778 | else |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 779 | pf.fname = NULL; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 780 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 781 | if (!pp->file || pf.fname) { |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 782 | if (pp->function) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 783 | find_probe_point_by_func(&pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 784 | else if (pp->lazy_line) |
| 785 | find_probe_point_lazy(NULL, &pf); |
Masami Hiramatsu | b0ef073 | 2009-10-27 16:43:19 -0400 | [diff] [blame] | 786 | else { |
| 787 | pf.lno = pp->line; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 788 | find_probe_point_by_line(&pf); |
Masami Hiramatsu | b0ef073 | 2009-10-27 16:43:19 -0400 | [diff] [blame] | 789 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 790 | } |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 791 | off = noff; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 792 | } |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 793 | line_list__free(&pf.lcache); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 794 | dwarf_end(dbg); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 795 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 796 | return pf.ntevs; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 797 | } |
| 798 | |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 799 | /* Reverse search */ |
| 800 | int find_perf_probe_point(int fd, unsigned long addr, |
| 801 | struct perf_probe_point *ppt) |
| 802 | { |
| 803 | Dwarf_Die cudie, spdie, indie; |
| 804 | Dwarf *dbg; |
| 805 | Dwarf_Line *line; |
| 806 | Dwarf_Addr laddr, eaddr; |
| 807 | const char *tmp; |
| 808 | int lineno, ret = 0; |
| 809 | |
| 810 | dbg = dwarf_begin(fd, DWARF_C_READ); |
| 811 | if (!dbg) |
| 812 | return -ENOENT; |
| 813 | |
| 814 | /* Find cu die */ |
| 815 | if (!dwarf_addrdie(dbg, (Dwarf_Addr)addr, &cudie)) |
| 816 | return -EINVAL; |
| 817 | |
| 818 | /* Find a corresponding line */ |
| 819 | line = dwarf_getsrc_die(&cudie, (Dwarf_Addr)addr); |
| 820 | if (line) { |
| 821 | dwarf_lineaddr(line, &laddr); |
| 822 | if ((Dwarf_Addr)addr == laddr) { |
| 823 | dwarf_lineno(line, &lineno); |
| 824 | ppt->line = lineno; |
| 825 | |
| 826 | tmp = dwarf_linesrc(line, NULL, NULL); |
| 827 | DIE_IF(!tmp); |
| 828 | ppt->file = xstrdup(tmp); |
| 829 | ret = 1; |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | /* Find a corresponding function */ |
| 834 | if (die_find_real_subprogram(&cudie, (Dwarf_Addr)addr, &spdie)) { |
| 835 | tmp = dwarf_diename(&spdie); |
| 836 | if (!tmp) |
| 837 | goto end; |
| 838 | |
| 839 | dwarf_entrypc(&spdie, &eaddr); |
| 840 | if (!lineno) { |
| 841 | /* We don't have a line number, let's use offset */ |
| 842 | ppt->function = xstrdup(tmp); |
| 843 | ppt->offset = addr - (unsigned long)eaddr; |
| 844 | ret = 1; |
| 845 | goto end; |
| 846 | } |
| 847 | if (die_find_inlinefunc(&spdie, (Dwarf_Addr)addr, &indie)) { |
| 848 | /* addr in an inline function */ |
| 849 | tmp = dwarf_diename(&indie); |
| 850 | if (!tmp) |
| 851 | goto end; |
| 852 | dwarf_decl_line(&indie, &lineno); |
| 853 | } else { |
| 854 | if (eaddr == addr) /* No offset: function entry */ |
| 855 | lineno = ppt->line; |
| 856 | else |
| 857 | dwarf_decl_line(&spdie, &lineno); |
| 858 | } |
| 859 | ppt->function = xstrdup(tmp); |
| 860 | ppt->line -= lineno; /* Make a relative line number */ |
| 861 | } |
| 862 | |
| 863 | end: |
| 864 | dwarf_end(dbg); |
| 865 | return ret; |
| 866 | } |
| 867 | |
| 868 | |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 869 | /* Find line range from its line number */ |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 870 | static void find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 871 | { |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 872 | Dwarf_Lines *lines; |
| 873 | Dwarf_Line *line; |
| 874 | size_t nlines, i; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 875 | Dwarf_Addr addr; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 876 | int lineno; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 877 | int ret; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 878 | const char *src; |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 879 | Dwarf_Die die_mem; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 880 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 881 | line_list__init(&lf->lr->line_list); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 882 | ret = dwarf_getsrclines(&lf->cu_die, &lines, &nlines); |
| 883 | DIE_IF(ret != 0); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 884 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 885 | for (i = 0; i < nlines; i++) { |
| 886 | line = dwarf_onesrcline(lines, i); |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 887 | ret = dwarf_lineno(line, &lineno); |
| 888 | DIE_IF(ret != 0); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 889 | if (lf->lno_s > lineno || lf->lno_e < lineno) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 890 | continue; |
| 891 | |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 892 | if (sp_die) { |
| 893 | /* Address filtering 1: does sp_die include addr? */ |
| 894 | ret = dwarf_lineaddr(line, &addr); |
| 895 | DIE_IF(ret != 0); |
| 896 | if (!dwarf_haspc(sp_die, addr)) |
| 897 | continue; |
| 898 | |
| 899 | /* Address filtering 2: No child include addr? */ |
Masami Hiramatsu | 95a3e4c | 2010-03-16 18:05:51 -0400 | [diff] [blame] | 900 | if (die_find_inlinefunc(sp_die, addr, &die_mem)) |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 901 | continue; |
| 902 | } |
| 903 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 904 | /* TODO: Get fileno from line, but how? */ |
| 905 | src = dwarf_linesrc(line, NULL, NULL); |
| 906 | if (strtailcmp(src, lf->fname) != 0) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 907 | continue; |
| 908 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 909 | /* Copy real path */ |
| 910 | if (!lf->lr->path) |
Masami Hiramatsu | 31facc5 | 2010-03-16 18:05:30 -0400 | [diff] [blame] | 911 | lf->lr->path = xstrdup(src); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 912 | line_list__add_line(&lf->lr->line_list, (unsigned int)lineno); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 913 | } |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 914 | /* Update status */ |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 915 | if (!list_empty(&lf->lr->line_list)) |
| 916 | lf->found = 1; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 917 | else { |
| 918 | free(lf->lr->path); |
| 919 | lf->lr->path = NULL; |
| 920 | } |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 921 | } |
| 922 | |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 923 | static int line_range_inline_cb(Dwarf_Die *in_die, void *data) |
| 924 | { |
| 925 | find_line_range_by_line(in_die, (struct line_finder *)data); |
| 926 | return DWARF_CB_ABORT; /* No need to find other instances */ |
| 927 | } |
| 928 | |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 929 | /* Search function from function name */ |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 930 | static int line_range_search_cb(Dwarf_Die *sp_die, void *data) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 931 | { |
| 932 | struct line_finder *lf = (struct line_finder *)data; |
| 933 | struct line_range *lr = lf->lr; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 934 | |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 935 | if (dwarf_tag(sp_die) == DW_TAG_subprogram && |
| 936 | die_compare_name(sp_die, lr->function) == 0) { |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 937 | lf->fname = dwarf_decl_file(sp_die); |
| 938 | dwarf_decl_line(sp_die, &lr->offset); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 939 | pr_debug("fname: %s, lineno:%d\n", lf->fname, lr->offset); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 940 | lf->lno_s = lr->offset + lr->start; |
| 941 | if (!lr->end) |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 942 | lf->lno_e = INT_MAX; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 943 | else |
| 944 | lf->lno_e = lr->offset + lr->end; |
| 945 | lr->start = lf->lno_s; |
| 946 | lr->end = lf->lno_e; |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 947 | if (dwarf_func_inline(sp_die)) |
| 948 | dwarf_func_inline_instances(sp_die, |
| 949 | line_range_inline_cb, lf); |
| 950 | else |
| 951 | find_line_range_by_line(sp_die, lf); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 952 | return 1; |
| 953 | } |
| 954 | return 0; |
| 955 | } |
| 956 | |
| 957 | static void find_line_range_by_func(struct line_finder *lf) |
| 958 | { |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 959 | dwarf_getfuncs(&lf->cu_die, line_range_search_cb, lf, 0); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 960 | } |
| 961 | |
| 962 | int find_line_range(int fd, struct line_range *lr) |
| 963 | { |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 964 | struct line_finder lf = {.lr = lr, .found = 0}; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 965 | int ret; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 966 | Dwarf_Off off = 0, noff; |
| 967 | size_t cuhl; |
| 968 | Dwarf_Die *diep; |
| 969 | Dwarf *dbg; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 970 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 971 | dbg = dwarf_begin(fd, DWARF_C_READ); |
| 972 | if (!dbg) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 973 | return -ENOENT; |
| 974 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 975 | /* Loop on CUs (Compilation Unit) */ |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 976 | while (!lf.found) { |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 977 | ret = dwarf_nextcu(dbg, off, &noff, &cuhl, NULL, NULL, NULL); |
| 978 | if (ret != 0) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 979 | break; |
| 980 | |
| 981 | /* Get the DIE(Debugging Information Entry) of this CU */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 982 | diep = dwarf_offdie(dbg, off + cuhl, &lf.cu_die); |
| 983 | if (!diep) |
| 984 | continue; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 985 | |
| 986 | /* Check if target file is included. */ |
| 987 | if (lr->file) |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 988 | lf.fname = cu_find_realpath(&lf.cu_die, lr->file); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 989 | else |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 990 | lf.fname = 0; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 991 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 992 | if (!lr->file || lf.fname) { |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 993 | if (lr->function) |
| 994 | find_line_range_by_func(&lf); |
| 995 | else { |
| 996 | lf.lno_s = lr->start; |
| 997 | if (!lr->end) |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 998 | lf.lno_e = INT_MAX; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 999 | else |
| 1000 | lf.lno_e = lr->end; |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 1001 | find_line_range_by_line(NULL, &lf); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1002 | } |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1003 | } |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1004 | off = noff; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1005 | } |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1006 | pr_debug("path: %lx\n", (unsigned long)lr->path); |
| 1007 | dwarf_end(dbg); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1008 | return lf.found; |
| 1009 | } |
| 1010 | |