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> |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 29 | #include <stdlib.h> |
| 30 | #include <string.h> |
| 31 | #include <stdarg.h> |
Ian Munsie | cd932c5 | 2010-04-20 16:58:32 +1000 | [diff] [blame] | 32 | #include <dwarf-regs.h> |
Masami Hiramatsu | 074fc0e | 2009-10-16 20:08:01 -0400 | [diff] [blame] | 33 | |
Masami Hiramatsu | 124bb83 | 2011-02-04 21:52:11 +0900 | [diff] [blame] | 34 | #include <linux/bitops.h> |
Masami Hiramatsu | 89c69c0 | 2009-10-16 20:08:10 -0400 | [diff] [blame] | 35 | #include "event.h" |
Masami Hiramatsu | a15ad2f | 2014-02-06 05:32:27 +0000 | [diff] [blame] | 36 | #include "dso.h" |
Masami Hiramatsu | 89c69c0 | 2009-10-16 20:08:10 -0400 | [diff] [blame] | 37 | #include "debug.h" |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 38 | #include "intlist.h" |
Masami Hiramatsu | 074fc0e | 2009-10-16 20:08:01 -0400 | [diff] [blame] | 39 | #include "util.h" |
Chase Douglas | 9ed7e1b | 2010-06-14 15:26:30 -0400 | [diff] [blame] | 40 | #include "symbol.h" |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 41 | #include "probe-finder.h" |
| 42 | |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 43 | /* Kprobe tracer basic type is up to u64 */ |
| 44 | #define MAX_BASIC_TYPE_BITS 64 |
| 45 | |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 46 | /* Dwarf FL wrappers */ |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 47 | static char *debuginfo_path; /* Currently dummy */ |
| 48 | |
| 49 | static const Dwfl_Callbacks offline_callbacks = { |
| 50 | .find_debuginfo = dwfl_standard_find_debuginfo, |
| 51 | .debuginfo_path = &debuginfo_path, |
| 52 | |
| 53 | .section_address = dwfl_offline_section_address, |
| 54 | |
| 55 | /* We use this table for core files too. */ |
| 56 | .find_elf = dwfl_build_id_find_elf, |
| 57 | }; |
| 58 | |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 59 | /* Get a Dwarf from offline image */ |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 60 | static int debuginfo__init_offline_dwarf(struct debuginfo *dbg, |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 61 | const char *path) |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 62 | { |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 63 | int fd; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 64 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 65 | fd = open(path, O_RDONLY); |
| 66 | if (fd < 0) |
| 67 | return fd; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 68 | |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 69 | dbg->dwfl = dwfl_begin(&offline_callbacks); |
| 70 | if (!dbg->dwfl) |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 71 | goto error; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 72 | |
Masami Hiramatsu | 9135949 | 2015-10-01 01:41:28 +0900 | [diff] [blame] | 73 | dwfl_report_begin(dbg->dwfl); |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 74 | dbg->mod = dwfl_report_offline(dbg->dwfl, "", "", fd); |
| 75 | if (!dbg->mod) |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 76 | goto error; |
| 77 | |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 78 | dbg->dbg = dwfl_module_getdwarf(dbg->mod, &dbg->bias); |
| 79 | if (!dbg->dbg) |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 80 | goto error; |
| 81 | |
Masami Hiramatsu | 9135949 | 2015-10-01 01:41:28 +0900 | [diff] [blame] | 82 | dwfl_report_end(dbg->dwfl, NULL, NULL); |
| 83 | |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 84 | return 0; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 85 | error: |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 86 | if (dbg->dwfl) |
| 87 | dwfl_end(dbg->dwfl); |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 88 | else |
| 89 | close(fd); |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 90 | memset(dbg, 0, sizeof(*dbg)); |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 91 | |
| 92 | return -ENOENT; |
Masami Hiramatsu | 469b9b8 | 2010-10-21 19:13:41 +0900 | [diff] [blame] | 93 | } |
| 94 | |
Masami Hiramatsu | a15ad2f | 2014-02-06 05:32:27 +0000 | [diff] [blame] | 95 | static struct debuginfo *__debuginfo__new(const char *path) |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 96 | { |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 97 | struct debuginfo *dbg = zalloc(sizeof(*dbg)); |
| 98 | if (!dbg) |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 99 | return NULL; |
| 100 | |
Arnaldo Carvalho de Melo | 0466252 | 2013-12-26 17:41:15 -0300 | [diff] [blame] | 101 | if (debuginfo__init_offline_dwarf(dbg, path) < 0) |
| 102 | zfree(&dbg); |
Masami Hiramatsu | a15ad2f | 2014-02-06 05:32:27 +0000 | [diff] [blame] | 103 | if (dbg) |
| 104 | pr_debug("Open Debuginfo file: %s\n", path); |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 105 | return dbg; |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 106 | } |
| 107 | |
Masami Hiramatsu | a15ad2f | 2014-02-06 05:32:27 +0000 | [diff] [blame] | 108 | enum dso_binary_type distro_dwarf_types[] = { |
| 109 | DSO_BINARY_TYPE__FEDORA_DEBUGINFO, |
| 110 | DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, |
| 111 | DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO, |
| 112 | DSO_BINARY_TYPE__BUILDID_DEBUGINFO, |
| 113 | DSO_BINARY_TYPE__NOT_FOUND, |
| 114 | }; |
| 115 | |
| 116 | struct debuginfo *debuginfo__new(const char *path) |
| 117 | { |
| 118 | enum dso_binary_type *type; |
| 119 | char buf[PATH_MAX], nil = '\0'; |
| 120 | struct dso *dso; |
| 121 | struct debuginfo *dinfo = NULL; |
| 122 | |
| 123 | /* Try to open distro debuginfo files */ |
| 124 | dso = dso__new(path); |
| 125 | if (!dso) |
| 126 | goto out; |
| 127 | |
| 128 | for (type = distro_dwarf_types; |
| 129 | !dinfo && *type != DSO_BINARY_TYPE__NOT_FOUND; |
| 130 | type++) { |
| 131 | if (dso__read_binary_type_filename(dso, *type, &nil, |
| 132 | buf, PATH_MAX) < 0) |
| 133 | continue; |
| 134 | dinfo = __debuginfo__new(buf); |
| 135 | } |
Arnaldo Carvalho de Melo | d3a7c48 | 2015-06-02 11:53:26 -0300 | [diff] [blame] | 136 | dso__put(dso); |
Masami Hiramatsu | a15ad2f | 2014-02-06 05:32:27 +0000 | [diff] [blame] | 137 | |
| 138 | out: |
| 139 | /* if failed to open all distro debuginfo, open given binary */ |
| 140 | return dinfo ? : __debuginfo__new(path); |
| 141 | } |
| 142 | |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 143 | void debuginfo__delete(struct debuginfo *dbg) |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 144 | { |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 145 | if (dbg) { |
| 146 | if (dbg->dwfl) |
| 147 | dwfl_end(dbg->dwfl); |
| 148 | free(dbg); |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 149 | } |
| 150 | } |
| 151 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 152 | /* |
| 153 | * Probe finder related functions |
| 154 | */ |
| 155 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 156 | static struct probe_trace_arg_ref *alloc_trace_arg_ref(long offs) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 157 | { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 158 | struct probe_trace_arg_ref *ref; |
| 159 | ref = zalloc(sizeof(struct probe_trace_arg_ref)); |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 160 | if (ref != NULL) |
| 161 | ref->offset = offs; |
| 162 | return ref; |
| 163 | } |
| 164 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 165 | /* |
| 166 | * Convert a location into trace_arg. |
| 167 | * If tvar == NULL, this just checks variable can be converted. |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 168 | * If fentry == true and vr_die is a parameter, do huristic search |
| 169 | * for the location fuzzed by function entry mcount. |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 170 | */ |
| 171 | static int convert_variable_location(Dwarf_Die *vr_die, Dwarf_Addr addr, |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 172 | Dwarf_Op *fb_ops, Dwarf_Die *sp_die, |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 173 | struct probe_trace_arg *tvar) |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 174 | { |
| 175 | Dwarf_Attribute attr; |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 176 | Dwarf_Addr tmp = 0; |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 177 | Dwarf_Op *op; |
| 178 | size_t nops; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 179 | unsigned int regn; |
| 180 | Dwarf_Word offs = 0; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 181 | bool ref = false; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 182 | const char *regs; |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 183 | int ret, ret2 = 0; |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 184 | |
Masami Hiramatsu | 632941c | 2010-10-21 19:13:16 +0900 | [diff] [blame] | 185 | if (dwarf_attr(vr_die, DW_AT_external, &attr) != NULL) |
| 186 | goto static_var; |
| 187 | |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 188 | /* TODO: handle more than 1 exprs */ |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 189 | if (dwarf_attr(vr_die, DW_AT_location, &attr) == NULL) |
| 190 | return -EINVAL; /* Broken DIE ? */ |
| 191 | if (dwarf_getlocation_addr(&attr, addr, &op, &nops, 1) <= 0) { |
| 192 | ret = dwarf_entrypc(sp_die, &tmp); |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 193 | if (ret) |
| 194 | return -ENOENT; |
| 195 | |
| 196 | if (probe_conf.show_location_range && |
| 197 | (dwarf_tag(vr_die) == DW_TAG_variable)) { |
| 198 | ret2 = -ERANGE; |
| 199 | } else if (addr != tmp || |
| 200 | dwarf_tag(vr_die) != DW_TAG_formal_parameter) { |
| 201 | return -ENOENT; |
| 202 | } |
| 203 | |
| 204 | ret = dwarf_highpc(sp_die, &tmp); |
| 205 | if (ret) |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 206 | return -ENOENT; |
| 207 | /* |
| 208 | * This is fuzzed by fentry mcount. We try to find the |
| 209 | * parameter location at the earliest address. |
| 210 | */ |
| 211 | for (addr += 1; addr <= tmp; addr++) { |
| 212 | if (dwarf_getlocation_addr(&attr, addr, &op, |
| 213 | &nops, 1) > 0) |
| 214 | goto found; |
| 215 | } |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 216 | return -ENOENT; |
| 217 | } |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 218 | found: |
| 219 | if (nops == 0) |
| 220 | /* TODO: Support const_value */ |
| 221 | return -ENOENT; |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 222 | |
| 223 | if (op->atom == DW_OP_addr) { |
Masami Hiramatsu | 632941c | 2010-10-21 19:13:16 +0900 | [diff] [blame] | 224 | static_var: |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 225 | if (!tvar) |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 226 | return ret2; |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 227 | /* Static variables on memory (not stack), make @varname */ |
| 228 | ret = strlen(dwarf_diename(vr_die)); |
| 229 | tvar->value = zalloc(ret + 2); |
| 230 | if (tvar->value == NULL) |
| 231 | return -ENOMEM; |
| 232 | snprintf(tvar->value, ret + 2, "@%s", dwarf_diename(vr_die)); |
| 233 | tvar->ref = alloc_trace_arg_ref((long)offs); |
| 234 | if (tvar->ref == NULL) |
| 235 | return -ENOMEM; |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 236 | return ret2; |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 237 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 238 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 239 | /* If this is based on frame buffer, set the offset */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 240 | if (op->atom == DW_OP_fbreg) { |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 241 | if (fb_ops == NULL) |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 242 | return -ENOTSUP; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 243 | ref = true; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 244 | offs = op->number; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 245 | op = &fb_ops[0]; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 246 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 247 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 248 | if (op->atom >= DW_OP_breg0 && op->atom <= DW_OP_breg31) { |
| 249 | regn = op->atom - DW_OP_breg0; |
| 250 | offs += op->number; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 251 | ref = true; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 252 | } else if (op->atom >= DW_OP_reg0 && op->atom <= DW_OP_reg31) { |
| 253 | regn = op->atom - DW_OP_reg0; |
| 254 | } else if (op->atom == DW_OP_bregx) { |
| 255 | regn = op->number; |
| 256 | offs += op->number2; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 257 | ref = true; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 258 | } else if (op->atom == DW_OP_regx) { |
| 259 | regn = op->number; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 260 | } else { |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 261 | pr_debug("DW_OP %x is not supported.\n", op->atom); |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 262 | return -ENOTSUP; |
| 263 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 264 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 265 | if (!tvar) |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 266 | return ret2; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 267 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 268 | regs = get_arch_regstr(regn); |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 269 | if (!regs) { |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 270 | /* This should be a bug in DWARF or this tool */ |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 271 | pr_warning("Mapping for the register number %u " |
| 272 | "missing on this architecture.\n", regn); |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 273 | return -ENOTSUP; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 274 | } |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 275 | |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 276 | tvar->value = strdup(regs); |
| 277 | if (tvar->value == NULL) |
| 278 | return -ENOMEM; |
| 279 | |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 280 | if (ref) { |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 281 | tvar->ref = alloc_trace_arg_ref((long)offs); |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 282 | if (tvar->ref == NULL) |
| 283 | return -ENOMEM; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 284 | } |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 285 | return ret2; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 286 | } |
| 287 | |
Masami Hiramatsu | 124bb83 | 2011-02-04 21:52:11 +0900 | [diff] [blame] | 288 | #define BYTES_TO_BITS(nb) ((nb) * BITS_PER_LONG / sizeof(long)) |
| 289 | |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 290 | static int convert_variable_type(Dwarf_Die *vr_die, |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 291 | struct probe_trace_arg *tvar, |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 292 | const char *cast) |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 293 | { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 294 | struct probe_trace_arg_ref **ref_ptr = &tvar->ref; |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 295 | Dwarf_Die type; |
| 296 | char buf[16]; |
Masami Hiramatsu | 5f03cba | 2014-08-14 02:22:34 +0000 | [diff] [blame] | 297 | char sbuf[STRERR_BUFSIZE]; |
Masami Hiramatsu | bcfc082 | 2011-06-27 16:27:21 +0900 | [diff] [blame] | 298 | int bsize, boffs, total; |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 299 | int ret; |
| 300 | |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 301 | /* TODO: check all types */ |
| 302 | if (cast && strcmp(cast, "string") != 0) { |
| 303 | /* Non string type is OK */ |
| 304 | tvar->type = strdup(cast); |
| 305 | return (tvar->type == NULL) ? -ENOMEM : 0; |
| 306 | } |
| 307 | |
Masami Hiramatsu | bcfc082 | 2011-06-27 16:27:21 +0900 | [diff] [blame] | 308 | bsize = dwarf_bitsize(vr_die); |
| 309 | if (bsize > 0) { |
Masami Hiramatsu | 124bb83 | 2011-02-04 21:52:11 +0900 | [diff] [blame] | 310 | /* This is a bitfield */ |
Masami Hiramatsu | bcfc082 | 2011-06-27 16:27:21 +0900 | [diff] [blame] | 311 | boffs = dwarf_bitoffset(vr_die); |
| 312 | total = dwarf_bytesize(vr_die); |
| 313 | if (boffs < 0 || total < 0) |
| 314 | return -ENOENT; |
| 315 | ret = snprintf(buf, 16, "b%d@%d/%zd", bsize, boffs, |
| 316 | BYTES_TO_BITS(total)); |
Masami Hiramatsu | 124bb83 | 2011-02-04 21:52:11 +0900 | [diff] [blame] | 317 | goto formatted; |
| 318 | } |
| 319 | |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 320 | if (die_get_real_type(vr_die, &type) == NULL) { |
| 321 | pr_warning("Failed to get a type information of %s.\n", |
| 322 | dwarf_diename(vr_die)); |
| 323 | return -ENOENT; |
| 324 | } |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 325 | |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 326 | pr_debug("%s type is %s.\n", |
| 327 | dwarf_diename(vr_die), dwarf_diename(&type)); |
| 328 | |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 329 | if (cast && strcmp(cast, "string") == 0) { /* String type */ |
| 330 | ret = dwarf_tag(&type); |
| 331 | if (ret != DW_TAG_pointer_type && |
| 332 | ret != DW_TAG_array_type) { |
| 333 | pr_warning("Failed to cast into string: " |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 334 | "%s(%s) is not a pointer nor array.\n", |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 335 | dwarf_diename(vr_die), dwarf_diename(&type)); |
| 336 | return -EINVAL; |
| 337 | } |
Hyeoncheol Lee | 7ce28b5 | 2012-09-11 16:57:28 +0900 | [diff] [blame] | 338 | if (die_get_real_type(&type, &type) == NULL) { |
| 339 | pr_warning("Failed to get a type" |
| 340 | " information.\n"); |
| 341 | return -ENOENT; |
| 342 | } |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 343 | if (ret == DW_TAG_pointer_type) { |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 344 | while (*ref_ptr) |
| 345 | ref_ptr = &(*ref_ptr)->next; |
| 346 | /* Add new reference with offset +0 */ |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 347 | *ref_ptr = zalloc(sizeof(struct probe_trace_arg_ref)); |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 348 | if (*ref_ptr == NULL) { |
| 349 | pr_warning("Out of memory error\n"); |
| 350 | return -ENOMEM; |
| 351 | } |
| 352 | } |
Masami Hiramatsu | 8217563 | 2010-07-09 18:29:17 +0900 | [diff] [blame] | 353 | if (!die_compare_name(&type, "char") && |
| 354 | !die_compare_name(&type, "unsigned char")) { |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 355 | pr_warning("Failed to cast into string: " |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 356 | "%s is not (unsigned) char *.\n", |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 357 | dwarf_diename(vr_die)); |
| 358 | return -EINVAL; |
| 359 | } |
| 360 | tvar->type = strdup(cast); |
| 361 | return (tvar->type == NULL) ? -ENOMEM : 0; |
| 362 | } |
| 363 | |
Masami Hiramatsu | bcfc082 | 2011-06-27 16:27:21 +0900 | [diff] [blame] | 364 | ret = dwarf_bytesize(&type); |
| 365 | if (ret <= 0) |
Masami Hiramatsu | 124bb83 | 2011-02-04 21:52:11 +0900 | [diff] [blame] | 366 | /* No size ... try to use default type */ |
| 367 | return 0; |
Masami Hiramatsu | bcfc082 | 2011-06-27 16:27:21 +0900 | [diff] [blame] | 368 | ret = BYTES_TO_BITS(ret); |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 369 | |
Masami Hiramatsu | 124bb83 | 2011-02-04 21:52:11 +0900 | [diff] [blame] | 370 | /* Check the bitwidth */ |
| 371 | if (ret > MAX_BASIC_TYPE_BITS) { |
| 372 | pr_info("%s exceeds max-bitwidth. Cut down to %d bits.\n", |
| 373 | dwarf_diename(&type), MAX_BASIC_TYPE_BITS); |
| 374 | ret = MAX_BASIC_TYPE_BITS; |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 375 | } |
Masami Hiramatsu | 124bb83 | 2011-02-04 21:52:11 +0900 | [diff] [blame] | 376 | ret = snprintf(buf, 16, "%c%d", |
| 377 | die_is_signed_type(&type) ? 's' : 'u', ret); |
| 378 | |
| 379 | formatted: |
| 380 | if (ret < 0 || ret >= 16) { |
| 381 | if (ret >= 16) |
| 382 | ret = -E2BIG; |
| 383 | pr_warning("Failed to convert variable type: %s\n", |
Masami Hiramatsu | 5f03cba | 2014-08-14 02:22:34 +0000 | [diff] [blame] | 384 | strerror_r(-ret, sbuf, sizeof(sbuf))); |
Masami Hiramatsu | 124bb83 | 2011-02-04 21:52:11 +0900 | [diff] [blame] | 385 | return ret; |
| 386 | } |
| 387 | tvar->type = strdup(buf); |
| 388 | if (tvar->type == NULL) |
| 389 | return -ENOMEM; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 390 | return 0; |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 391 | } |
| 392 | |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 393 | static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname, |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 394 | struct perf_probe_arg_field *field, |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 395 | struct probe_trace_arg_ref **ref_ptr, |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 396 | Dwarf_Die *die_mem) |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 397 | { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 398 | struct probe_trace_arg_ref *ref = *ref_ptr; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 399 | Dwarf_Die type; |
| 400 | Dwarf_Word offs; |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 401 | int ret, tag; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 402 | |
| 403 | pr_debug("converting %s in %s\n", field->name, varname); |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 404 | if (die_get_real_type(vr_die, &type) == NULL) { |
| 405 | pr_warning("Failed to get the type of %s.\n", varname); |
| 406 | return -ENOENT; |
| 407 | } |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 408 | pr_debug2("Var real type: (%x)\n", (unsigned)dwarf_dieoffset(&type)); |
| 409 | tag = dwarf_tag(&type); |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 410 | |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 411 | if (field->name[0] == '[' && |
| 412 | (tag == DW_TAG_array_type || tag == DW_TAG_pointer_type)) { |
| 413 | if (field->next) |
| 414 | /* Save original type for next field */ |
| 415 | memcpy(die_mem, &type, sizeof(*die_mem)); |
| 416 | /* Get the type of this array */ |
| 417 | if (die_get_real_type(&type, &type) == NULL) { |
| 418 | pr_warning("Failed to get the type of %s.\n", varname); |
| 419 | return -ENOENT; |
| 420 | } |
| 421 | pr_debug2("Array real type: (%x)\n", |
| 422 | (unsigned)dwarf_dieoffset(&type)); |
| 423 | if (tag == DW_TAG_pointer_type) { |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 424 | ref = zalloc(sizeof(struct probe_trace_arg_ref)); |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 425 | if (ref == NULL) |
| 426 | return -ENOMEM; |
| 427 | if (*ref_ptr) |
| 428 | (*ref_ptr)->next = ref; |
| 429 | else |
| 430 | *ref_ptr = ref; |
| 431 | } |
Masami Hiramatsu | bcfc082 | 2011-06-27 16:27:21 +0900 | [diff] [blame] | 432 | ref->offset += dwarf_bytesize(&type) * field->index; |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 433 | if (!field->next) |
| 434 | /* Save vr_die for converting types */ |
| 435 | memcpy(die_mem, vr_die, sizeof(*die_mem)); |
| 436 | goto next; |
| 437 | } else if (tag == DW_TAG_pointer_type) { |
| 438 | /* Check the pointer and dereference */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 439 | if (!field->ref) { |
| 440 | pr_err("Semantic error: %s must be referred by '->'\n", |
| 441 | field->name); |
| 442 | return -EINVAL; |
| 443 | } |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 444 | /* Get the type pointed by this pointer */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 445 | if (die_get_real_type(&type, &type) == NULL) { |
| 446 | pr_warning("Failed to get the type of %s.\n", varname); |
| 447 | return -ENOENT; |
| 448 | } |
Masami Hiramatsu | 12e5a7a | 2010-04-02 12:50:53 -0400 | [diff] [blame] | 449 | /* Verify it is a data structure */ |
Hyeoncheol Lee | 7b0295b | 2012-09-12 16:57:45 +0900 | [diff] [blame] | 450 | tag = dwarf_tag(&type); |
| 451 | if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) { |
| 452 | pr_warning("%s is not a data structure nor an union.\n", |
| 453 | varname); |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 454 | return -EINVAL; |
| 455 | } |
Masami Hiramatsu | 12e5a7a | 2010-04-02 12:50:53 -0400 | [diff] [blame] | 456 | |
Srikar Dronamraju | 0e60836 | 2010-07-29 19:43:51 +0530 | [diff] [blame] | 457 | ref = zalloc(sizeof(struct probe_trace_arg_ref)); |
Masami Hiramatsu | e334016f1 | 2010-04-12 13:17:49 -0400 | [diff] [blame] | 458 | if (ref == NULL) |
| 459 | return -ENOMEM; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 460 | if (*ref_ptr) |
| 461 | (*ref_ptr)->next = ref; |
| 462 | else |
| 463 | *ref_ptr = ref; |
| 464 | } else { |
Masami Hiramatsu | 12e5a7a | 2010-04-02 12:50:53 -0400 | [diff] [blame] | 465 | /* Verify it is a data structure */ |
Hyeoncheol Lee | 7b0295b | 2012-09-12 16:57:45 +0900 | [diff] [blame] | 466 | if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) { |
| 467 | pr_warning("%s is not a data structure nor an union.\n", |
| 468 | varname); |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 469 | return -EINVAL; |
| 470 | } |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 471 | if (field->name[0] == '[') { |
Masanari Iida | d939be3 | 2015-02-27 23:52:31 +0900 | [diff] [blame] | 472 | pr_err("Semantic error: %s is not a pointer" |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 473 | " nor array.\n", varname); |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 474 | return -EINVAL; |
| 475 | } |
Masami Hiramatsu | c727383 | 2015-04-02 16:33:12 +0900 | [diff] [blame] | 476 | /* While prcessing unnamed field, we don't care about this */ |
| 477 | if (field->ref && dwarf_diename(vr_die)) { |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 478 | pr_err("Semantic error: %s must be referred by '.'\n", |
| 479 | field->name); |
| 480 | return -EINVAL; |
| 481 | } |
| 482 | if (!ref) { |
| 483 | pr_warning("Structure on a register is not " |
| 484 | "supported yet.\n"); |
| 485 | return -ENOTSUP; |
| 486 | } |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 487 | } |
| 488 | |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 489 | if (die_find_member(&type, field->name, die_mem) == NULL) { |
Arnaldo Carvalho de Melo | 9ef0438 | 2013-10-24 17:36:31 -0300 | [diff] [blame] | 490 | pr_warning("%s(type:%s) has no member %s.\n", varname, |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 491 | dwarf_diename(&type), field->name); |
| 492 | return -EINVAL; |
| 493 | } |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 494 | |
| 495 | /* Get the offset of the field */ |
Hyeoncheol Lee | 7b0295b | 2012-09-12 16:57:45 +0900 | [diff] [blame] | 496 | if (tag == DW_TAG_union_type) { |
| 497 | offs = 0; |
| 498 | } else { |
| 499 | ret = die_get_data_member_location(die_mem, &offs); |
| 500 | if (ret < 0) { |
| 501 | pr_warning("Failed to get the offset of %s.\n", |
| 502 | field->name); |
| 503 | return ret; |
| 504 | } |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 505 | } |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 506 | ref->offset += (long)offs; |
| 507 | |
Masami Hiramatsu | c727383 | 2015-04-02 16:33:12 +0900 | [diff] [blame] | 508 | /* If this member is unnamed, we need to reuse this field */ |
| 509 | if (!dwarf_diename(die_mem)) |
| 510 | return convert_variable_fields(die_mem, varname, field, |
| 511 | &ref, die_mem); |
| 512 | |
Masami Hiramatsu | b2a3c12 | 2010-05-19 15:57:42 -0400 | [diff] [blame] | 513 | next: |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 514 | /* Converting next field */ |
| 515 | if (field->next) |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 516 | return convert_variable_fields(die_mem, field->name, |
Masami Hiramatsu | de1439d | 2010-04-14 17:44:00 -0300 | [diff] [blame] | 517 | field->next, &ref, die_mem); |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 518 | else |
| 519 | return 0; |
Masami Hiramatsu | 7df2f32 | 2010-03-16 18:06:26 -0400 | [diff] [blame] | 520 | } |
| 521 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 522 | /* Show a variables in kprobe event format */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 523 | static int convert_variable(Dwarf_Die *vr_die, struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 524 | { |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 525 | Dwarf_Die die_mem; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 526 | int ret; |
| 527 | |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 528 | pr_debug("Converting variable %s into trace event.\n", |
| 529 | dwarf_diename(vr_die)); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 530 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 531 | ret = convert_variable_location(vr_die, pf->addr, pf->fb_ops, |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 532 | &pf->sp_die, pf->tvar); |
He Kuang | 7d5eaba | 2015-05-11 09:25:04 +0000 | [diff] [blame] | 533 | if (ret == -ENOENT || ret == -EINVAL) { |
| 534 | pr_err("Failed to find the location of the '%s' variable at this address.\n" |
| 535 | " Perhaps it has been optimized out.\n" |
| 536 | " Use -V with the --range option to show '%s' location range.\n", |
| 537 | pf->pvar->var, pf->pvar->var); |
| 538 | } else if (ret == -ENOTSUP) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 539 | pr_err("Sorry, we don't support this variable location yet.\n"); |
Masami Hiramatsu | 0c188a0 | 2014-05-29 19:52:32 +0900 | [diff] [blame] | 540 | else if (ret == 0 && pf->pvar->field) { |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 541 | ret = convert_variable_fields(vr_die, pf->pvar->var, |
| 542 | pf->pvar->field, &pf->tvar->ref, |
| 543 | &die_mem); |
Masami Hiramatsu | 4984912 | 2010-04-12 13:17:15 -0400 | [diff] [blame] | 544 | vr_die = &die_mem; |
| 545 | } |
Masami Hiramatsu | 73317b9 | 2010-05-19 15:57:35 -0400 | [diff] [blame] | 546 | if (ret == 0) |
| 547 | ret = convert_variable_type(vr_die, pf->tvar, pf->pvar->type); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 548 | /* *expr will be cached in libdw. Don't free it. */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 549 | return ret; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 550 | } |
| 551 | |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 552 | /* Find a variable in a scope DIE */ |
| 553 | static int find_variable(Dwarf_Die *sc_die, struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 554 | { |
Masami Hiramatsu | f182e3e | 2011-08-11 20:03:05 +0900 | [diff] [blame] | 555 | Dwarf_Die vr_die; |
Masami Hiramatsu | 11a1ca3 | 2010-04-12 13:17:22 -0400 | [diff] [blame] | 556 | char buf[32], *ptr; |
Masami Hiramatsu | f182e3e | 2011-08-11 20:03:05 +0900 | [diff] [blame] | 557 | int ret = 0; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 558 | |
Wang Nan | da15bd9 | 2015-08-26 10:57:45 +0000 | [diff] [blame] | 559 | /* Copy raw parameters */ |
| 560 | if (!is_c_varname(pf->pvar->var)) |
| 561 | return copy_to_probe_trace_arg(pf->tvar, pf->pvar); |
Masami Hiramatsu | 367e94c | 2010-08-27 20:38:59 +0900 | [diff] [blame] | 562 | |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 563 | if (pf->pvar->name) |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 564 | pf->tvar->name = strdup(pf->pvar->name); |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 565 | else { |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 566 | ret = synthesize_perf_probe_arg(pf->pvar, buf, 32); |
| 567 | if (ret < 0) |
| 568 | return ret; |
Masami Hiramatsu | 11a1ca3 | 2010-04-12 13:17:22 -0400 | [diff] [blame] | 569 | ptr = strchr(buf, ':'); /* Change type separator to _ */ |
| 570 | if (ptr) |
| 571 | *ptr = '_'; |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 572 | pf->tvar->name = strdup(buf); |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 573 | } |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 574 | if (pf->tvar->name == NULL) |
| 575 | return -ENOMEM; |
Masami Hiramatsu | 4848193 | 2010-04-12 13:16:53 -0400 | [diff] [blame] | 576 | |
Masami Hiramatsu | f182e3e | 2011-08-11 20:03:05 +0900 | [diff] [blame] | 577 | pr_debug("Searching '%s' variable in context.\n", pf->pvar->var); |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 578 | /* Search child die for local variables and parameters. */ |
Masami Hiramatsu | f182e3e | 2011-08-11 20:03:05 +0900 | [diff] [blame] | 579 | if (!die_find_variable_at(sc_die, pf->pvar->var, pf->addr, &vr_die)) { |
| 580 | /* Search again in global variables */ |
He Kuang | d13855e | 2015-04-25 16:08:58 +0800 | [diff] [blame] | 581 | if (!die_find_variable_at(&pf->cu_die, pf->pvar->var, |
| 582 | 0, &vr_die)) { |
Masami Hiramatsu | 36d789a | 2014-06-06 07:13:45 +0000 | [diff] [blame] | 583 | pr_warning("Failed to find '%s' in this function.\n", |
| 584 | pf->pvar->var); |
Masami Hiramatsu | f182e3e | 2011-08-11 20:03:05 +0900 | [diff] [blame] | 585 | ret = -ENOENT; |
He Kuang | d13855e | 2015-04-25 16:08:58 +0800 | [diff] [blame] | 586 | } |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 587 | } |
Masami Hiramatsu | f66fedc | 2011-08-20 14:39:23 +0900 | [diff] [blame] | 588 | if (ret >= 0) |
Masami Hiramatsu | f182e3e | 2011-08-11 20:03:05 +0900 | [diff] [blame] | 589 | ret = convert_variable(&vr_die, pf); |
| 590 | |
Masami Hiramatsu | b7dcb85 | 2010-05-19 15:57:49 -0400 | [diff] [blame] | 591 | return ret; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 592 | } |
| 593 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 594 | /* Convert subprogram DIE to trace point */ |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 595 | static int convert_to_trace_point(Dwarf_Die *sp_die, Dwfl_Module *mod, |
| 596 | Dwarf_Addr paddr, bool retprobe, |
Masami Hiramatsu | 6cca13b | 2015-10-01 01:41:37 +0900 | [diff] [blame] | 597 | const char *function, |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 598 | struct probe_trace_point *tp) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 599 | { |
Prashanth Nageshappa | 26b7952 | 2012-02-24 13:11:39 +0530 | [diff] [blame] | 600 | Dwarf_Addr eaddr, highaddr; |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 601 | GElf_Sym sym; |
| 602 | const char *symbol; |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 603 | |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 604 | /* Verify the address is correct */ |
| 605 | if (dwarf_entrypc(sp_die, &eaddr) != 0) { |
| 606 | pr_warning("Failed to get entry address of %s\n", |
| 607 | dwarf_diename(sp_die)); |
| 608 | return -ENOENT; |
| 609 | } |
| 610 | if (dwarf_highpc(sp_die, &highaddr) != 0) { |
| 611 | pr_warning("Failed to get end address of %s\n", |
| 612 | dwarf_diename(sp_die)); |
| 613 | return -ENOENT; |
| 614 | } |
| 615 | if (paddr > highaddr) { |
| 616 | pr_warning("Offset specified is greater than size of %s\n", |
| 617 | dwarf_diename(sp_die)); |
| 618 | return -EINVAL; |
| 619 | } |
| 620 | |
Masami Hiramatsu | 664fee3 | 2014-09-17 08:41:01 +0000 | [diff] [blame] | 621 | symbol = dwarf_diename(sp_die); |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 622 | if (!symbol) { |
Masami Hiramatsu | 664fee3 | 2014-09-17 08:41:01 +0000 | [diff] [blame] | 623 | /* Try to get the symbol name from symtab */ |
| 624 | symbol = dwfl_module_addrsym(mod, paddr, &sym, NULL); |
| 625 | if (!symbol) { |
| 626 | pr_warning("Failed to find symbol at 0x%lx\n", |
| 627 | (unsigned long)paddr); |
| 628 | return -ENOENT; |
| 629 | } |
| 630 | eaddr = sym.st_value; |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 631 | } |
Masami Hiramatsu | 664fee3 | 2014-09-17 08:41:01 +0000 | [diff] [blame] | 632 | tp->offset = (unsigned long)(paddr - eaddr); |
Masami Hiramatsu | fb7345b | 2013-12-26 05:41:53 +0000 | [diff] [blame] | 633 | tp->address = (unsigned long)paddr; |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 634 | tp->symbol = strdup(symbol); |
| 635 | if (!tp->symbol) |
| 636 | return -ENOMEM; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 637 | |
Masami Hiramatsu | 04ddd04 | 2010-08-27 20:38:53 +0900 | [diff] [blame] | 638 | /* Return probe must be on the head of a subprogram */ |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 639 | if (retprobe) { |
| 640 | if (eaddr != paddr) { |
Masami Hiramatsu | 6cca13b | 2015-10-01 01:41:37 +0900 | [diff] [blame] | 641 | pr_warning("Failed to find \"%s%%return\",\n" |
| 642 | " because %s is an inlined function and" |
| 643 | " has no return point.\n", function, |
| 644 | function); |
Masami Hiramatsu | 04ddd04 | 2010-08-27 20:38:53 +0900 | [diff] [blame] | 645 | return -EINVAL; |
| 646 | } |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 647 | tp->retprobe = true; |
Masami Hiramatsu | 04ddd04 | 2010-08-27 20:38:53 +0900 | [diff] [blame] | 648 | } |
| 649 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 650 | return 0; |
| 651 | } |
| 652 | |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 653 | /* Call probe_finder callback with scope DIE */ |
| 654 | static int call_probe_finder(Dwarf_Die *sc_die, struct probe_finder *pf) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 655 | { |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 656 | Dwarf_Attribute fb_attr; |
Masami Hiramatsu | 4d3b162 | 2015-11-25 19:34:32 +0900 | [diff] [blame^] | 657 | Dwarf_Frame *frame = NULL; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 658 | size_t nops; |
| 659 | int ret; |
| 660 | |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 661 | if (!sc_die) { |
| 662 | pr_err("Caller must pass a scope DIE. Program error.\n"); |
| 663 | return -EINVAL; |
| 664 | } |
| 665 | |
| 666 | /* If not a real subprogram, find a real one */ |
Masami Hiramatsu | 0dbb1ca | 2012-04-23 12:24:36 +0900 | [diff] [blame] | 667 | if (!die_is_func_def(sc_die)) { |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 668 | if (!die_find_realfunc(&pf->cu_die, pf->addr, &pf->sp_die)) { |
Naveen N. Rao | d4c537e | 2015-04-30 17:12:31 +0530 | [diff] [blame] | 669 | if (die_find_tailfunc(&pf->cu_die, pf->addr, &pf->sp_die)) { |
| 670 | pr_warning("Ignoring tail call from %s\n", |
| 671 | dwarf_diename(&pf->sp_die)); |
| 672 | return 0; |
| 673 | } else { |
| 674 | pr_warning("Failed to find probe point in any " |
| 675 | "functions.\n"); |
| 676 | return -ENOENT; |
| 677 | } |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 678 | } |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 679 | } else |
| 680 | memcpy(&pf->sp_die, sc_die, sizeof(Dwarf_Die)); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 681 | |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 682 | /* Get the frame base attribute/ops from subprogram */ |
| 683 | dwarf_attr(&pf->sp_die, DW_AT_frame_base, &fb_attr); |
Masami Hiramatsu | d0cb426 | 2010-03-15 13:02:35 -0400 | [diff] [blame] | 684 | ret = dwarf_getlocation_addr(&fb_attr, pf->addr, &pf->fb_ops, &nops, 1); |
Masami Hiramatsu | a34a985 | 2010-04-12 13:17:29 -0400 | [diff] [blame] | 685 | if (ret <= 0 || nops == 0) { |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 686 | pf->fb_ops = NULL; |
Masami Hiramatsu | 7752f1b | 2010-05-10 13:12:07 -0400 | [diff] [blame] | 687 | #if _ELFUTILS_PREREQ(0, 142) |
Masami Hiramatsu | a34a985 | 2010-04-12 13:17:29 -0400 | [diff] [blame] | 688 | } else if (nops == 1 && pf->fb_ops[0].atom == DW_OP_call_frame_cfa && |
| 689 | pf->cfi != NULL) { |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 690 | if (dwarf_cfi_addrframe(pf->cfi, pf->addr, &frame) != 0 || |
| 691 | dwarf_frame_cfa(frame, &pf->fb_ops, &nops) != 0) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 692 | pr_warning("Failed to get call frame on 0x%jx\n", |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 693 | (uintmax_t)pf->addr); |
Masami Hiramatsu | 4d3b162 | 2015-11-25 19:34:32 +0900 | [diff] [blame^] | 694 | free(frame); |
| 695 | return -ENOENT; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 696 | } |
Masami Hiramatsu | 7752f1b | 2010-05-10 13:12:07 -0400 | [diff] [blame] | 697 | #endif |
Masami Hiramatsu | a34a985 | 2010-04-12 13:17:29 -0400 | [diff] [blame] | 698 | } |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 699 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 700 | /* Call finder's callback handler */ |
Masami Hiramatsu | 4d3b162 | 2015-11-25 19:34:32 +0900 | [diff] [blame^] | 701 | ret = pf->callback(sc_die, pf); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 702 | |
Masami Hiramatsu | 4d3b162 | 2015-11-25 19:34:32 +0900 | [diff] [blame^] | 703 | /* Since *pf->fb_ops can be a part of frame. we should free it here. */ |
| 704 | free(frame); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 705 | pf->fb_ops = NULL; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 706 | |
| 707 | return ret; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 708 | } |
| 709 | |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 710 | struct find_scope_param { |
| 711 | const char *function; |
| 712 | const char *file; |
| 713 | int line; |
| 714 | int diff; |
| 715 | Dwarf_Die *die_mem; |
| 716 | bool found; |
| 717 | }; |
| 718 | |
| 719 | static int find_best_scope_cb(Dwarf_Die *fn_die, void *data) |
| 720 | { |
| 721 | struct find_scope_param *fsp = data; |
| 722 | const char *file; |
| 723 | int lno; |
| 724 | |
| 725 | /* Skip if declared file name does not match */ |
| 726 | if (fsp->file) { |
| 727 | file = dwarf_decl_file(fn_die); |
| 728 | if (!file || strcmp(fsp->file, file) != 0) |
| 729 | return 0; |
| 730 | } |
| 731 | /* If the function name is given, that's what user expects */ |
| 732 | if (fsp->function) { |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 733 | if (die_match_name(fn_die, fsp->function)) { |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 734 | memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die)); |
| 735 | fsp->found = true; |
| 736 | return 1; |
| 737 | } |
| 738 | } else { |
| 739 | /* With the line number, find the nearest declared DIE */ |
| 740 | dwarf_decl_line(fn_die, &lno); |
| 741 | if (lno < fsp->line && fsp->diff > fsp->line - lno) { |
| 742 | /* Keep a candidate and continue */ |
| 743 | fsp->diff = fsp->line - lno; |
| 744 | memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die)); |
| 745 | fsp->found = true; |
| 746 | } |
| 747 | } |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | /* Find an appropriate scope fits to given conditions */ |
| 752 | static Dwarf_Die *find_best_scope(struct probe_finder *pf, Dwarf_Die *die_mem) |
| 753 | { |
| 754 | struct find_scope_param fsp = { |
| 755 | .function = pf->pev->point.function, |
| 756 | .file = pf->fname, |
| 757 | .line = pf->lno, |
| 758 | .diff = INT_MAX, |
| 759 | .die_mem = die_mem, |
| 760 | .found = false, |
| 761 | }; |
| 762 | |
| 763 | cu_walk_functions_at(&pf->cu_die, pf->addr, find_best_scope_cb, &fsp); |
| 764 | |
| 765 | return fsp.found ? die_mem : NULL; |
| 766 | } |
| 767 | |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 768 | static int probe_point_line_walker(const char *fname, int lineno, |
| 769 | Dwarf_Addr addr, void *data) |
| 770 | { |
| 771 | struct probe_finder *pf = data; |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 772 | Dwarf_Die *sc_die, die_mem; |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 773 | int ret; |
| 774 | |
| 775 | if (lineno != pf->lno || strtailcmp(fname, pf->fname) != 0) |
| 776 | return 0; |
| 777 | |
| 778 | pf->addr = addr; |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 779 | sc_die = find_best_scope(pf, &die_mem); |
| 780 | if (!sc_die) { |
| 781 | pr_warning("Failed to find scope of probe point.\n"); |
| 782 | return -ENOENT; |
| 783 | } |
| 784 | |
| 785 | ret = call_probe_finder(sc_die, pf); |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 786 | |
| 787 | /* Continue if no error, because the line will be in inline function */ |
Arnaldo Carvalho de Melo | fbee632 | 2011-02-21 13:23:57 -0300 | [diff] [blame] | 788 | return ret < 0 ? ret : 0; |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 789 | } |
| 790 | |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 791 | /* Find probe point from its line number */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 792 | static int find_probe_point_by_line(struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 793 | { |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 794 | return die_walk_lines(&pf->cu_die, probe_point_line_walker, pf); |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 795 | } |
| 796 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 797 | /* Find lines which match lazy pattern */ |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 798 | static int find_lazy_match_lines(struct intlist *list, |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 799 | const char *fname, const char *pat) |
| 800 | { |
Franck Bui-Huu | f50c216 | 2011-01-13 11:18:30 +0100 | [diff] [blame] | 801 | FILE *fp; |
| 802 | char *line = NULL; |
| 803 | size_t line_len; |
| 804 | ssize_t len; |
| 805 | int count = 0, linenum = 1; |
Masami Hiramatsu | 5f03cba | 2014-08-14 02:22:34 +0000 | [diff] [blame] | 806 | char sbuf[STRERR_BUFSIZE]; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 807 | |
Franck Bui-Huu | f50c216 | 2011-01-13 11:18:30 +0100 | [diff] [blame] | 808 | fp = fopen(fname, "r"); |
| 809 | if (!fp) { |
Masami Hiramatsu | 5f03cba | 2014-08-14 02:22:34 +0000 | [diff] [blame] | 810 | pr_warning("Failed to open %s: %s\n", fname, |
| 811 | strerror_r(errno, sbuf, sizeof(sbuf))); |
Arnaldo Carvalho de Melo | b448c4b | 2010-05-18 23:04:28 -0300 | [diff] [blame] | 812 | return -errno; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 813 | } |
| 814 | |
Franck Bui-Huu | f50c216 | 2011-01-13 11:18:30 +0100 | [diff] [blame] | 815 | while ((len = getline(&line, &line_len, fp)) > 0) { |
| 816 | |
| 817 | if (line[len - 1] == '\n') |
| 818 | line[len - 1] = '\0'; |
| 819 | |
| 820 | if (strlazymatch(line, pat)) { |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 821 | intlist__add(list, linenum); |
Franck Bui-Huu | f50c216 | 2011-01-13 11:18:30 +0100 | [diff] [blame] | 822 | count++; |
| 823 | } |
| 824 | linenum++; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 825 | } |
Arnaldo Carvalho de Melo | b448c4b | 2010-05-18 23:04:28 -0300 | [diff] [blame] | 826 | |
Franck Bui-Huu | f50c216 | 2011-01-13 11:18:30 +0100 | [diff] [blame] | 827 | if (ferror(fp)) |
| 828 | count = -errno; |
| 829 | free(line); |
| 830 | fclose(fp); |
| 831 | |
| 832 | if (count == 0) |
| 833 | pr_debug("No matched lines found in %s.\n", fname); |
| 834 | return count; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 835 | } |
| 836 | |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 837 | static int probe_point_lazy_walker(const char *fname, int lineno, |
| 838 | Dwarf_Addr addr, void *data) |
| 839 | { |
| 840 | struct probe_finder *pf = data; |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 841 | Dwarf_Die *sc_die, die_mem; |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 842 | int ret; |
| 843 | |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 844 | if (!intlist__has_entry(pf->lcache, lineno) || |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 845 | strtailcmp(fname, pf->fname) != 0) |
| 846 | return 0; |
| 847 | |
| 848 | pr_debug("Probe line found: line:%d addr:0x%llx\n", |
| 849 | lineno, (unsigned long long)addr); |
| 850 | pf->addr = addr; |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 851 | pf->lno = lineno; |
| 852 | sc_die = find_best_scope(pf, &die_mem); |
| 853 | if (!sc_die) { |
| 854 | pr_warning("Failed to find scope of probe point.\n"); |
| 855 | return -ENOENT; |
| 856 | } |
| 857 | |
| 858 | ret = call_probe_finder(sc_die, pf); |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 859 | |
| 860 | /* |
| 861 | * Continue if no error, because the lazy pattern will match |
| 862 | * to other lines |
| 863 | */ |
Ingo Molnar | 5e814dd5 | 2011-03-15 20:51:09 +0100 | [diff] [blame] | 864 | return ret < 0 ? ret : 0; |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 865 | } |
| 866 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 867 | /* Find probe points from lazy pattern */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 868 | static int find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *pf) |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 869 | { |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 870 | int ret = 0; |
Naohiro Aota | 09ed897 | 2015-03-13 14:18:40 +0900 | [diff] [blame] | 871 | char *fpath; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 872 | |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 873 | if (intlist__empty(pf->lcache)) { |
Naohiro Aota | 09ed897 | 2015-03-13 14:18:40 +0900 | [diff] [blame] | 874 | const char *comp_dir; |
| 875 | |
| 876 | comp_dir = cu_get_comp_dir(&pf->cu_die); |
| 877 | ret = get_real_path(pf->fname, comp_dir, &fpath); |
| 878 | if (ret < 0) { |
| 879 | pr_warning("Failed to find source file path.\n"); |
| 880 | return ret; |
| 881 | } |
| 882 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 883 | /* Matching lazy line pattern */ |
Naohiro Aota | 09ed897 | 2015-03-13 14:18:40 +0900 | [diff] [blame] | 884 | ret = find_lazy_match_lines(pf->lcache, fpath, |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 885 | pf->pev->point.lazy_line); |
Naohiro Aota | 09ed897 | 2015-03-13 14:18:40 +0900 | [diff] [blame] | 886 | free(fpath); |
Franck Bui-Huu | f50c216 | 2011-01-13 11:18:30 +0100 | [diff] [blame] | 887 | if (ret <= 0) |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 888 | return ret; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 889 | } |
| 890 | |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 891 | return die_walk_lines(sp_die, probe_point_lazy_walker, pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 892 | } |
| 893 | |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 894 | static int probe_point_inline_cb(Dwarf_Die *in_die, void *data) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 895 | { |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 896 | struct probe_finder *pf = data; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 897 | struct perf_probe_point *pp = &pf->pev->point; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 898 | Dwarf_Addr addr; |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 899 | int ret; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 900 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 901 | if (pp->lazy_line) |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 902 | ret = find_probe_point_lazy(in_die, pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 903 | else { |
| 904 | /* Get probe address */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 905 | if (dwarf_entrypc(in_die, &addr) != 0) { |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 906 | pr_warning("Failed to get entry address of %s.\n", |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 907 | dwarf_diename(in_die)); |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 908 | return -ENOENT; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 909 | } |
| 910 | pf->addr = addr; |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 911 | pf->addr += pp->offset; |
| 912 | pr_debug("found inline addr: 0x%jx\n", |
| 913 | (uintmax_t)pf->addr); |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 914 | |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 915 | ret = call_probe_finder(in_die, pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 916 | } |
| 917 | |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 918 | return ret; |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 919 | } |
| 920 | |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 921 | /* Callback parameter with return value for libdw */ |
| 922 | struct dwarf_callback_param { |
| 923 | void *data; |
| 924 | int retval; |
| 925 | }; |
| 926 | |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 927 | /* Search function from function name */ |
| 928 | static int probe_point_search_cb(Dwarf_Die *sp_die, void *data) |
| 929 | { |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 930 | struct dwarf_callback_param *param = data; |
| 931 | struct probe_finder *pf = param->data; |
Masami Hiramatsu | 4235b04 | 2010-03-16 18:06:12 -0400 | [diff] [blame] | 932 | struct perf_probe_point *pp = &pf->pev->point; |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 933 | |
| 934 | /* Check tag and diename */ |
Masami Hiramatsu | 0dbb1ca | 2012-04-23 12:24:36 +0900 | [diff] [blame] | 935 | if (!die_is_func_def(sp_die) || |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 936 | !die_match_name(sp_die, pp->function)) |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 937 | return DWARF_CB_OK; |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 938 | |
Masami Hiramatsu | 7d21635 | 2011-03-30 18:25:41 +0900 | [diff] [blame] | 939 | /* Check declared file */ |
| 940 | if (pp->file && strtailcmp(pp->file, dwarf_decl_file(sp_die))) |
| 941 | return DWARF_CB_OK; |
| 942 | |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 943 | pr_debug("Matched function: %s\n", dwarf_diename(sp_die)); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 944 | pf->fname = dwarf_decl_file(sp_die); |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 945 | if (pp->line) { /* Function relative line */ |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 946 | dwarf_decl_line(sp_die, &pf->lno); |
| 947 | pf->lno += pp->line; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 948 | param->retval = find_probe_point_by_line(pf); |
Masami Hiramatsu | e1ecbbc | 2015-01-30 18:37:44 +0900 | [diff] [blame] | 949 | } else if (die_is_func_instance(sp_die)) { |
| 950 | /* Instances always have the entry address */ |
| 951 | dwarf_entrypc(sp_die, &pf->addr); |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 952 | /* Real function */ |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 953 | if (pp->lazy_line) |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 954 | param->retval = find_probe_point_lazy(sp_die, pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 955 | else { |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 956 | pf->addr += pp->offset; |
| 957 | /* TODO: Check the address in this function */ |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 958 | param->retval = call_probe_finder(sp_die, pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 959 | } |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 960 | } else if (!probe_conf.no_inlines) { |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 961 | /* Inlined function: search instances */ |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 962 | param->retval = die_walk_instances(sp_die, |
| 963 | probe_point_inline_cb, (void *)pf); |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 964 | /* This could be a non-existed inline definition */ |
| 965 | if (param->retval == -ENOENT && strisglob(pp->function)) |
| 966 | param->retval = 0; |
| 967 | } |
| 968 | |
| 969 | /* We need to find other candidates */ |
| 970 | if (strisglob(pp->function) && param->retval >= 0) { |
| 971 | param->retval = 0; /* We have to clear the result */ |
| 972 | return DWARF_CB_OK; |
| 973 | } |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 974 | |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 975 | return DWARF_CB_ABORT; /* Exit; no same symbol in this CU. */ |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 976 | } |
| 977 | |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 978 | static int find_probe_point_by_func(struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 979 | { |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 980 | struct dwarf_callback_param _param = {.data = (void *)pf, |
| 981 | .retval = 0}; |
| 982 | dwarf_getfuncs(&pf->cu_die, probe_point_search_cb, &_param, 0); |
| 983 | return _param.retval; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 984 | } |
| 985 | |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 986 | struct pubname_callback_param { |
| 987 | char *function; |
| 988 | char *file; |
| 989 | Dwarf_Die *cu_die; |
| 990 | Dwarf_Die *sp_die; |
| 991 | int found; |
| 992 | }; |
| 993 | |
| 994 | static int pubname_search_cb(Dwarf *dbg, Dwarf_Global *gl, void *data) |
| 995 | { |
| 996 | struct pubname_callback_param *param = data; |
| 997 | |
| 998 | if (dwarf_offdie(dbg, gl->die_offset, param->sp_die)) { |
| 999 | if (dwarf_tag(param->sp_die) != DW_TAG_subprogram) |
| 1000 | return DWARF_CB_OK; |
| 1001 | |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 1002 | if (die_match_name(param->sp_die, param->function)) { |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1003 | if (!dwarf_offdie(dbg, gl->cu_offset, param->cu_die)) |
| 1004 | return DWARF_CB_OK; |
| 1005 | |
| 1006 | if (param->file && |
| 1007 | strtailcmp(param->file, dwarf_decl_file(param->sp_die))) |
| 1008 | return DWARF_CB_OK; |
| 1009 | |
| 1010 | param->found = 1; |
| 1011 | return DWARF_CB_ABORT; |
| 1012 | } |
| 1013 | } |
| 1014 | |
| 1015 | return DWARF_CB_OK; |
| 1016 | } |
| 1017 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1018 | /* Find probe points from debuginfo */ |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1019 | static int debuginfo__find_probes(struct debuginfo *dbg, |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 1020 | struct probe_finder *pf) |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1021 | { |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1022 | struct perf_probe_point *pp = &pf->pev->point; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1023 | Dwarf_Off off, noff; |
| 1024 | size_t cuhl; |
| 1025 | Dwarf_Die *diep; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1026 | int ret = 0; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1027 | |
Masami Hiramatsu | 7752f1b | 2010-05-10 13:12:07 -0400 | [diff] [blame] | 1028 | #if _ELFUTILS_PREREQ(0, 142) |
Namhyung Kim | 4093325 | 2014-12-30 17:47:47 +0900 | [diff] [blame] | 1029 | Elf *elf; |
| 1030 | GElf_Ehdr ehdr; |
| 1031 | GElf_Shdr shdr; |
| 1032 | |
Masami Hiramatsu | a34a985 | 2010-04-12 13:17:29 -0400 | [diff] [blame] | 1033 | /* Get the call frame information from this dwarf */ |
Namhyung Kim | 4093325 | 2014-12-30 17:47:47 +0900 | [diff] [blame] | 1034 | elf = dwarf_getelf(dbg->dbg); |
| 1035 | if (elf == NULL) |
| 1036 | return -EINVAL; |
| 1037 | |
| 1038 | if (gelf_getehdr(elf, &ehdr) == NULL) |
| 1039 | return -EINVAL; |
| 1040 | |
| 1041 | if (elf_section_by_name(elf, &ehdr, &shdr, ".eh_frame", NULL) && |
| 1042 | shdr.sh_type == SHT_PROGBITS) { |
| 1043 | pf->cfi = dwarf_getcfi_elf(elf); |
| 1044 | } else { |
| 1045 | pf->cfi = dwarf_getcfi(dbg->dbg); |
| 1046 | } |
Masami Hiramatsu | 7752f1b | 2010-05-10 13:12:07 -0400 | [diff] [blame] | 1047 | #endif |
Masami Hiramatsu | a34a985 | 2010-04-12 13:17:29 -0400 | [diff] [blame] | 1048 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1049 | off = 0; |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 1050 | pf->lcache = intlist__new(NULL); |
| 1051 | if (!pf->lcache) |
| 1052 | return -ENOMEM; |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1053 | |
| 1054 | /* Fastpath: lookup by function name from .debug_pubnames section */ |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 1055 | if (pp->function && !strisglob(pp->function)) { |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1056 | struct pubname_callback_param pubname_param = { |
| 1057 | .function = pp->function, |
| 1058 | .file = pp->file, |
| 1059 | .cu_die = &pf->cu_die, |
| 1060 | .sp_die = &pf->sp_die, |
Lin Ming | 2b348a7 | 2011-04-29 08:41:57 +0000 | [diff] [blame] | 1061 | .found = 0, |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1062 | }; |
| 1063 | struct dwarf_callback_param probe_param = { |
| 1064 | .data = pf, |
| 1065 | }; |
| 1066 | |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1067 | dwarf_getpubnames(dbg->dbg, pubname_search_cb, |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 1068 | &pubname_param, 0); |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1069 | if (pubname_param.found) { |
| 1070 | ret = probe_point_search_cb(&pf->sp_die, &probe_param); |
| 1071 | if (ret) |
| 1072 | goto found; |
| 1073 | } |
| 1074 | } |
| 1075 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1076 | /* Loop on CUs (Compilation Unit) */ |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1077 | while (!dwarf_nextcu(dbg->dbg, off, &noff, &cuhl, NULL, NULL, NULL)) { |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1078 | /* Get the DIE(Debugging Information Entry) of this CU */ |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1079 | diep = dwarf_offdie(dbg->dbg, off + cuhl, &pf->cu_die); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1080 | if (!diep) |
| 1081 | continue; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1082 | |
| 1083 | /* Check if target file is included. */ |
| 1084 | if (pp->file) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1085 | pf->fname = cu_find_realpath(&pf->cu_die, pp->file); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1086 | else |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1087 | pf->fname = NULL; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1088 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1089 | if (!pp->file || pf->fname) { |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1090 | if (pp->function) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1091 | ret = find_probe_point_by_func(pf); |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 1092 | else if (pp->lazy_line) |
He Kuang | f19e80c | 2015-04-13 19:41:30 +0800 | [diff] [blame] | 1093 | ret = find_probe_point_lazy(&pf->cu_die, pf); |
Masami Hiramatsu | b0ef073 | 2009-10-27 16:43:19 -0400 | [diff] [blame] | 1094 | else { |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1095 | pf->lno = pp->line; |
| 1096 | ret = find_probe_point_by_line(pf); |
Masami Hiramatsu | b0ef073 | 2009-10-27 16:43:19 -0400 | [diff] [blame] | 1097 | } |
Arnaldo Carvalho de Melo | 8635bf6 | 2011-02-22 06:56:18 -0300 | [diff] [blame] | 1098 | if (ret < 0) |
Arnaldo Carvalho de Melo | fbee632 | 2011-02-21 13:23:57 -0300 | [diff] [blame] | 1099 | break; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1100 | } |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1101 | off = noff; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1102 | } |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1103 | |
| 1104 | found: |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 1105 | intlist__delete(pf->lcache); |
| 1106 | pf->lcache = NULL; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1107 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1108 | return ret; |
| 1109 | } |
| 1110 | |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1111 | struct local_vars_finder { |
| 1112 | struct probe_finder *pf; |
| 1113 | struct perf_probe_arg *args; |
Masami Hiramatsu | f8bffbf | 2015-05-06 21:46:53 +0900 | [diff] [blame] | 1114 | bool vars; |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1115 | int max_args; |
| 1116 | int nargs; |
| 1117 | int ret; |
| 1118 | }; |
| 1119 | |
| 1120 | /* Collect available variables in this scope */ |
| 1121 | static int copy_variables_cb(Dwarf_Die *die_mem, void *data) |
| 1122 | { |
| 1123 | struct local_vars_finder *vf = data; |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 1124 | struct probe_finder *pf = vf->pf; |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1125 | int tag; |
| 1126 | |
| 1127 | tag = dwarf_tag(die_mem); |
| 1128 | if (tag == DW_TAG_formal_parameter || |
Masami Hiramatsu | f8bffbf | 2015-05-06 21:46:53 +0900 | [diff] [blame] | 1129 | (tag == DW_TAG_variable && vf->vars)) { |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1130 | if (convert_variable_location(die_mem, vf->pf->addr, |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 1131 | vf->pf->fb_ops, &pf->sp_die, |
| 1132 | NULL) == 0) { |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1133 | vf->args[vf->nargs].var = (char *)dwarf_diename(die_mem); |
| 1134 | if (vf->args[vf->nargs].var == NULL) { |
| 1135 | vf->ret = -ENOMEM; |
| 1136 | return DIE_FIND_CB_END; |
| 1137 | } |
| 1138 | pr_debug(" %s", vf->args[vf->nargs].var); |
| 1139 | vf->nargs++; |
| 1140 | } |
| 1141 | } |
| 1142 | |
| 1143 | if (dwarf_haspc(die_mem, vf->pf->addr)) |
| 1144 | return DIE_FIND_CB_CONTINUE; |
| 1145 | else |
| 1146 | return DIE_FIND_CB_SIBLING; |
| 1147 | } |
| 1148 | |
| 1149 | static int expand_probe_args(Dwarf_Die *sc_die, struct probe_finder *pf, |
| 1150 | struct perf_probe_arg *args) |
| 1151 | { |
| 1152 | Dwarf_Die die_mem; |
| 1153 | int i; |
| 1154 | int n = 0; |
Masami Hiramatsu | f8bffbf | 2015-05-06 21:46:53 +0900 | [diff] [blame] | 1155 | struct local_vars_finder vf = {.pf = pf, .args = args, .vars = false, |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1156 | .max_args = MAX_PROBE_ARGS, .ret = 0}; |
| 1157 | |
| 1158 | for (i = 0; i < pf->pev->nargs; i++) { |
| 1159 | /* var never be NULL */ |
Masami Hiramatsu | f8bffbf | 2015-05-06 21:46:53 +0900 | [diff] [blame] | 1160 | if (strcmp(pf->pev->args[i].var, PROBE_ARG_VARS) == 0) |
| 1161 | vf.vars = true; |
| 1162 | else if (strcmp(pf->pev->args[i].var, PROBE_ARG_PARAMS) != 0) { |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1163 | /* Copy normal argument */ |
| 1164 | args[n] = pf->pev->args[i]; |
| 1165 | n++; |
Masami Hiramatsu | f8bffbf | 2015-05-06 21:46:53 +0900 | [diff] [blame] | 1166 | continue; |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1167 | } |
Masami Hiramatsu | f8bffbf | 2015-05-06 21:46:53 +0900 | [diff] [blame] | 1168 | pr_debug("Expanding %s into:", pf->pev->args[i].var); |
| 1169 | vf.nargs = n; |
| 1170 | /* Special local variables */ |
| 1171 | die_find_child(sc_die, copy_variables_cb, (void *)&vf, |
| 1172 | &die_mem); |
| 1173 | pr_debug(" (%d)\n", vf.nargs - n); |
| 1174 | if (vf.ret < 0) |
| 1175 | return vf.ret; |
| 1176 | n = vf.nargs; |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1177 | } |
| 1178 | return n; |
| 1179 | } |
| 1180 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1181 | /* Add a found probe point into trace event list */ |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 1182 | static int add_probe_trace_event(Dwarf_Die *sc_die, struct probe_finder *pf) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1183 | { |
| 1184 | struct trace_event_finder *tf = |
| 1185 | container_of(pf, struct trace_event_finder, pf); |
Masami Hiramatsu | 6cca13b | 2015-10-01 01:41:37 +0900 | [diff] [blame] | 1186 | struct perf_probe_point *pp = &pf->pev->point; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1187 | struct probe_trace_event *tev; |
Wang Nan | 092b1f0 | 2015-11-13 12:29:11 +0000 | [diff] [blame] | 1188 | struct perf_probe_arg *args = NULL; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1189 | int ret, i; |
| 1190 | |
| 1191 | /* Check number of tevs */ |
| 1192 | if (tf->ntevs == tf->max_tevs) { |
| 1193 | pr_warning("Too many( > %d) probe point found.\n", |
| 1194 | tf->max_tevs); |
| 1195 | return -ERANGE; |
| 1196 | } |
| 1197 | tev = &tf->tevs[tf->ntevs++]; |
| 1198 | |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 1199 | /* Trace point should be converted from subprogram DIE */ |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 1200 | ret = convert_to_trace_point(&pf->sp_die, tf->mod, pf->addr, |
Masami Hiramatsu | 6cca13b | 2015-10-01 01:41:37 +0900 | [diff] [blame] | 1201 | pp->retprobe, pp->function, &tev->point); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1202 | if (ret < 0) |
Wang Nan | 092b1f0 | 2015-11-13 12:29:11 +0000 | [diff] [blame] | 1203 | goto end; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1204 | |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 1205 | tev->point.realname = strdup(dwarf_diename(sc_die)); |
Wang Nan | 092b1f0 | 2015-11-13 12:29:11 +0000 | [diff] [blame] | 1206 | if (!tev->point.realname) { |
| 1207 | ret = -ENOMEM; |
| 1208 | goto end; |
| 1209 | } |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 1210 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1211 | pr_debug("Probe point found: %s+%lu\n", tev->point.symbol, |
| 1212 | tev->point.offset); |
| 1213 | |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1214 | /* Expand special probe argument if exist */ |
| 1215 | args = zalloc(sizeof(struct perf_probe_arg) * MAX_PROBE_ARGS); |
Wang Nan | 092b1f0 | 2015-11-13 12:29:11 +0000 | [diff] [blame] | 1216 | if (args == NULL) { |
| 1217 | ret = -ENOMEM; |
| 1218 | goto end; |
| 1219 | } |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1220 | |
| 1221 | ret = expand_probe_args(sc_die, pf, args); |
| 1222 | if (ret < 0) |
| 1223 | goto end; |
| 1224 | |
| 1225 | tev->nargs = ret; |
| 1226 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
| 1227 | if (tev->args == NULL) { |
| 1228 | ret = -ENOMEM; |
| 1229 | goto end; |
| 1230 | } |
| 1231 | |
| 1232 | /* Find each argument */ |
| 1233 | for (i = 0; i < tev->nargs; i++) { |
| 1234 | pf->pvar = &args[i]; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1235 | pf->tvar = &tev->args[i]; |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 1236 | /* Variable should be found from scope DIE */ |
| 1237 | ret = find_variable(sc_die, pf); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1238 | if (ret != 0) |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1239 | break; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1240 | } |
| 1241 | |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1242 | end: |
Wang Nan | 092b1f0 | 2015-11-13 12:29:11 +0000 | [diff] [blame] | 1243 | if (ret) { |
| 1244 | clear_probe_trace_event(tev); |
| 1245 | tf->ntevs--; |
| 1246 | } |
Masami Hiramatsu | 7969ec7 | 2013-10-11 16:10:23 +0900 | [diff] [blame] | 1247 | free(args); |
| 1248 | return ret; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1249 | } |
| 1250 | |
| 1251 | /* Find probe_trace_events specified by perf_probe_event from debuginfo */ |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1252 | int debuginfo__find_trace_events(struct debuginfo *dbg, |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 1253 | struct perf_probe_event *pev, |
Masami Hiramatsu | ddb2f58 | 2015-05-08 10:03:31 +0900 | [diff] [blame] | 1254 | struct probe_trace_event **tevs) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1255 | { |
| 1256 | struct trace_event_finder tf = { |
| 1257 | .pf = {.pev = pev, .callback = add_probe_trace_event}, |
Masami Hiramatsu | ddb2f58 | 2015-05-08 10:03:31 +0900 | [diff] [blame] | 1258 | .max_tevs = probe_conf.max_probes, .mod = dbg->mod}; |
Masami Hiramatsu | 0196e78 | 2015-11-13 12:29:10 +0000 | [diff] [blame] | 1259 | int ret, i; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1260 | |
| 1261 | /* Allocate result tevs array */ |
Masami Hiramatsu | ddb2f58 | 2015-05-08 10:03:31 +0900 | [diff] [blame] | 1262 | *tevs = zalloc(sizeof(struct probe_trace_event) * tf.max_tevs); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1263 | if (*tevs == NULL) |
| 1264 | return -ENOMEM; |
| 1265 | |
| 1266 | tf.tevs = *tevs; |
| 1267 | tf.ntevs = 0; |
| 1268 | |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1269 | ret = debuginfo__find_probes(dbg, &tf.pf); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1270 | if (ret < 0) { |
Masami Hiramatsu | 0196e78 | 2015-11-13 12:29:10 +0000 | [diff] [blame] | 1271 | for (i = 0; i < tf.ntevs; i++) |
| 1272 | clear_probe_trace_event(&tf.tevs[i]); |
Arnaldo Carvalho de Melo | 0466252 | 2013-12-26 17:41:15 -0300 | [diff] [blame] | 1273 | zfree(tevs); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1274 | return ret; |
| 1275 | } |
| 1276 | |
| 1277 | return (ret < 0) ? ret : tf.ntevs; |
| 1278 | } |
| 1279 | |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1280 | /* Collect available variables in this scope */ |
| 1281 | static int collect_variables_cb(Dwarf_Die *die_mem, void *data) |
| 1282 | { |
| 1283 | struct available_var_finder *af = data; |
| 1284 | struct variable_list *vl; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1285 | int tag, ret; |
| 1286 | |
| 1287 | vl = &af->vls[af->nvls - 1]; |
| 1288 | |
| 1289 | tag = dwarf_tag(die_mem); |
| 1290 | if (tag == DW_TAG_formal_parameter || |
| 1291 | tag == DW_TAG_variable) { |
| 1292 | ret = convert_variable_location(die_mem, af->pf.addr, |
Masami Hiramatsu | 3d918a1 | 2013-10-11 16:10:26 +0900 | [diff] [blame] | 1293 | af->pf.fb_ops, &af->pf.sp_die, |
| 1294 | NULL); |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 1295 | if (ret == 0 || ret == -ERANGE) { |
| 1296 | int ret2; |
| 1297 | bool externs = !af->child; |
He Kuang | fb9596d | 2015-05-11 09:25:02 +0000 | [diff] [blame] | 1298 | struct strbuf buf; |
| 1299 | |
| 1300 | strbuf_init(&buf, 64); |
He Kuang | 349e8d2 | 2015-05-11 09:25:03 +0000 | [diff] [blame] | 1301 | |
| 1302 | if (probe_conf.show_location_range) { |
| 1303 | if (!externs) { |
| 1304 | if (ret) |
| 1305 | strbuf_addf(&buf, "[INV]\t"); |
| 1306 | else |
| 1307 | strbuf_addf(&buf, "[VAL]\t"); |
| 1308 | } else |
| 1309 | strbuf_addf(&buf, "[EXT]\t"); |
| 1310 | } |
| 1311 | |
| 1312 | ret2 = die_get_varname(die_mem, &buf); |
| 1313 | |
| 1314 | if (!ret2 && probe_conf.show_location_range && |
| 1315 | !externs) { |
| 1316 | strbuf_addf(&buf, "\t"); |
| 1317 | ret2 = die_get_var_range(&af->pf.sp_die, |
| 1318 | die_mem, &buf); |
| 1319 | } |
| 1320 | |
| 1321 | pr_debug("Add new var: %s\n", buf.buf); |
| 1322 | if (ret2 == 0) { |
He Kuang | fb9596d | 2015-05-11 09:25:02 +0000 | [diff] [blame] | 1323 | strlist__add(vl->vars, |
| 1324 | strbuf_detach(&buf, NULL)); |
| 1325 | } |
| 1326 | strbuf_release(&buf); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1327 | } |
| 1328 | } |
| 1329 | |
Masami Hiramatsu | fb8c5a5 | 2010-10-21 19:13:35 +0900 | [diff] [blame] | 1330 | if (af->child && dwarf_haspc(die_mem, af->pf.addr)) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1331 | return DIE_FIND_CB_CONTINUE; |
| 1332 | else |
| 1333 | return DIE_FIND_CB_SIBLING; |
| 1334 | } |
| 1335 | |
| 1336 | /* Add a found vars into available variables list */ |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 1337 | static int add_available_vars(Dwarf_Die *sc_die, struct probe_finder *pf) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1338 | { |
| 1339 | struct available_var_finder *af = |
| 1340 | container_of(pf, struct available_var_finder, pf); |
Masami Hiramatsu | 6cca13b | 2015-10-01 01:41:37 +0900 | [diff] [blame] | 1341 | struct perf_probe_point *pp = &pf->pev->point; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1342 | struct variable_list *vl; |
Masami Hiramatsu | f182e3e | 2011-08-11 20:03:05 +0900 | [diff] [blame] | 1343 | Dwarf_Die die_mem; |
| 1344 | int ret; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1345 | |
| 1346 | /* Check number of tevs */ |
| 1347 | if (af->nvls == af->max_vls) { |
| 1348 | pr_warning("Too many( > %d) probe point found.\n", af->max_vls); |
| 1349 | return -ERANGE; |
| 1350 | } |
| 1351 | vl = &af->vls[af->nvls++]; |
| 1352 | |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 1353 | /* Trace point should be converted from subprogram DIE */ |
Masami Hiramatsu | 576b523 | 2013-09-25 22:16:16 +0900 | [diff] [blame] | 1354 | ret = convert_to_trace_point(&pf->sp_die, af->mod, pf->addr, |
Masami Hiramatsu | 6cca13b | 2015-10-01 01:41:37 +0900 | [diff] [blame] | 1355 | pp->retprobe, pp->function, &vl->point); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1356 | if (ret < 0) |
| 1357 | return ret; |
| 1358 | |
| 1359 | pr_debug("Probe point found: %s+%lu\n", vl->point.symbol, |
| 1360 | vl->point.offset); |
| 1361 | |
| 1362 | /* Find local variables */ |
Arnaldo Carvalho de Melo | 4a77e21 | 2015-07-20 12:13:34 -0300 | [diff] [blame] | 1363 | vl->vars = strlist__new(NULL, NULL); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1364 | if (vl->vars == NULL) |
| 1365 | return -ENOMEM; |
Masami Hiramatsu | fb8c5a5 | 2010-10-21 19:13:35 +0900 | [diff] [blame] | 1366 | af->child = true; |
Masami Hiramatsu | 221d061 | 2011-08-11 20:02:59 +0900 | [diff] [blame] | 1367 | die_find_child(sc_die, collect_variables_cb, (void *)af, &die_mem); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1368 | |
Masami Hiramatsu | fb8c5a5 | 2010-10-21 19:13:35 +0900 | [diff] [blame] | 1369 | /* Find external variables */ |
Masami Hiramatsu | ddb2f58 | 2015-05-08 10:03:31 +0900 | [diff] [blame] | 1370 | if (!probe_conf.show_ext_vars) |
Masami Hiramatsu | fb8c5a5 | 2010-10-21 19:13:35 +0900 | [diff] [blame] | 1371 | goto out; |
Masami Hiramatsu | ddb2f58 | 2015-05-08 10:03:31 +0900 | [diff] [blame] | 1372 | /* Don't need to search child DIE for external vars. */ |
Masami Hiramatsu | fb8c5a5 | 2010-10-21 19:13:35 +0900 | [diff] [blame] | 1373 | af->child = false; |
Masami Hiramatsu | f182e3e | 2011-08-11 20:03:05 +0900 | [diff] [blame] | 1374 | die_find_child(&pf->cu_die, collect_variables_cb, (void *)af, &die_mem); |
Masami Hiramatsu | fb8c5a5 | 2010-10-21 19:13:35 +0900 | [diff] [blame] | 1375 | |
| 1376 | out: |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1377 | if (strlist__empty(vl->vars)) { |
| 1378 | strlist__delete(vl->vars); |
| 1379 | vl->vars = NULL; |
| 1380 | } |
| 1381 | |
| 1382 | return ret; |
| 1383 | } |
| 1384 | |
Masami Hiramatsu | 69e96ea | 2014-06-06 07:13:59 +0000 | [diff] [blame] | 1385 | /* |
| 1386 | * Find available variables at given probe point |
| 1387 | * Return the number of found probe points. Return 0 if there is no |
| 1388 | * matched probe point. Return <0 if an error occurs. |
| 1389 | */ |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1390 | int debuginfo__find_available_vars_at(struct debuginfo *dbg, |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 1391 | struct perf_probe_event *pev, |
Masami Hiramatsu | ddb2f58 | 2015-05-08 10:03:31 +0900 | [diff] [blame] | 1392 | struct variable_list **vls) |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1393 | { |
| 1394 | struct available_var_finder af = { |
| 1395 | .pf = {.pev = pev, .callback = add_available_vars}, |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1396 | .mod = dbg->mod, |
Masami Hiramatsu | ddb2f58 | 2015-05-08 10:03:31 +0900 | [diff] [blame] | 1397 | .max_vls = probe_conf.max_probes}; |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1398 | int ret; |
| 1399 | |
| 1400 | /* Allocate result vls array */ |
Masami Hiramatsu | ddb2f58 | 2015-05-08 10:03:31 +0900 | [diff] [blame] | 1401 | *vls = zalloc(sizeof(struct variable_list) * af.max_vls); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1402 | if (*vls == NULL) |
| 1403 | return -ENOMEM; |
| 1404 | |
| 1405 | af.vls = *vls; |
| 1406 | af.nvls = 0; |
| 1407 | |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1408 | ret = debuginfo__find_probes(dbg, &af.pf); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1409 | if (ret < 0) { |
| 1410 | /* Free vlist for error */ |
| 1411 | while (af.nvls--) { |
Arnaldo Carvalho de Melo | 74cf249 | 2013-12-27 16:55:14 -0300 | [diff] [blame] | 1412 | zfree(&af.vls[af.nvls].point.symbol); |
Arnaldo Carvalho de Melo | f538565 | 2013-12-26 15:54:57 -0300 | [diff] [blame] | 1413 | strlist__delete(af.vls[af.nvls].vars); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1414 | } |
Arnaldo Carvalho de Melo | 0466252 | 2013-12-26 17:41:15 -0300 | [diff] [blame] | 1415 | zfree(vls); |
Masami Hiramatsu | cf6eb48 | 2010-10-21 19:13:23 +0900 | [diff] [blame] | 1416 | return ret; |
| 1417 | } |
| 1418 | |
| 1419 | return (ret < 0) ? ret : af.nvls; |
Masami Hiramatsu | 4ea42b1 | 2009-10-08 17:17:38 -0400 | [diff] [blame] | 1420 | } |
| 1421 | |
Masami Hiramatsu | 9b239a1 | 2015-10-01 01:41:33 +0900 | [diff] [blame] | 1422 | /* For the kernel module, we need a special code to get a DIE */ |
| 1423 | static int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs) |
| 1424 | { |
| 1425 | int n, i; |
| 1426 | Elf32_Word shndx; |
| 1427 | Elf_Scn *scn; |
| 1428 | Elf *elf; |
| 1429 | GElf_Shdr mem, *shdr; |
| 1430 | const char *p; |
| 1431 | |
| 1432 | elf = dwfl_module_getelf(dbg->mod, &dbg->bias); |
| 1433 | if (!elf) |
| 1434 | return -EINVAL; |
| 1435 | |
| 1436 | /* Get the number of relocations */ |
| 1437 | n = dwfl_module_relocations(dbg->mod); |
| 1438 | if (n < 0) |
| 1439 | return -ENOENT; |
| 1440 | /* Search the relocation related .text section */ |
| 1441 | for (i = 0; i < n; i++) { |
| 1442 | p = dwfl_module_relocation_info(dbg->mod, i, &shndx); |
| 1443 | if (strcmp(p, ".text") == 0) { |
| 1444 | /* OK, get the section header */ |
| 1445 | scn = elf_getscn(elf, shndx); |
| 1446 | if (!scn) |
| 1447 | return -ENOENT; |
| 1448 | shdr = gelf_getshdr(scn, &mem); |
| 1449 | if (!shdr) |
| 1450 | return -ENOENT; |
| 1451 | *offs = shdr->sh_addr; |
| 1452 | } |
| 1453 | } |
| 1454 | return 0; |
| 1455 | } |
| 1456 | |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1457 | /* Reverse search */ |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1458 | int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 1459 | struct perf_probe_point *ppt) |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1460 | { |
| 1461 | Dwarf_Die cudie, spdie, indie; |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1462 | Dwarf_Addr _addr = 0, baseaddr = 0; |
| 1463 | const char *fname = NULL, *func = NULL, *basefunc = NULL, *tmp; |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1464 | int baseline = 0, lineno = 0, ret = 0; |
Masami Hiramatsu | 9b239a1 | 2015-10-01 01:41:33 +0900 | [diff] [blame] | 1465 | bool reloc = false; |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1466 | |
Masami Hiramatsu | 9b239a1 | 2015-10-01 01:41:33 +0900 | [diff] [blame] | 1467 | retry: |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1468 | /* Find cu die */ |
Masami Hiramatsu | 0104fe6 | 2015-03-02 21:49:46 +0900 | [diff] [blame] | 1469 | if (!dwarf_addrdie(dbg->dbg, (Dwarf_Addr)addr, &cudie)) { |
Masami Hiramatsu | 9b239a1 | 2015-10-01 01:41:33 +0900 | [diff] [blame] | 1470 | if (!reloc && debuginfo__get_text_offset(dbg, &baseaddr) == 0) { |
| 1471 | addr += baseaddr; |
| 1472 | reloc = true; |
| 1473 | goto retry; |
| 1474 | } |
Masami Hiramatsu | 0e43e5d | 2010-12-17 22:12:11 +0900 | [diff] [blame] | 1475 | pr_warning("Failed to find debug information for address %lx\n", |
| 1476 | addr); |
Masami Hiramatsu | 75ec5a2 | 2010-04-02 12:50:59 -0400 | [diff] [blame] | 1477 | ret = -EINVAL; |
| 1478 | goto end; |
| 1479 | } |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1480 | |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1481 | /* Find a corresponding line (filename and lineno) */ |
| 1482 | cu_find_lineinfo(&cudie, addr, &fname, &lineno); |
| 1483 | /* Don't care whether it failed or not */ |
| 1484 | |
| 1485 | /* Find a corresponding function (name, baseline and baseaddr) */ |
Masami Hiramatsu | e0d153c | 2011-06-27 16:27:27 +0900 | [diff] [blame] | 1486 | if (die_find_realfunc(&cudie, (Dwarf_Addr)addr, &spdie)) { |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1487 | /* Get function entry information */ |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1488 | func = basefunc = dwarf_diename(&spdie); |
| 1489 | if (!func || |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1490 | dwarf_entrypc(&spdie, &baseaddr) != 0 || |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1491 | dwarf_decl_line(&spdie, &baseline) != 0) { |
| 1492 | lineno = 0; |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1493 | goto post; |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1494 | } |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1495 | |
Masami Hiramatsu | 1b286bd | 2013-10-11 12:23:17 +0000 | [diff] [blame] | 1496 | fname = dwarf_decl_file(&spdie); |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1497 | if (addr == (unsigned long)baseaddr) { |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1498 | /* Function entry - Relative line number is 0 */ |
| 1499 | lineno = baseline; |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1500 | goto post; |
| 1501 | } |
| 1502 | |
| 1503 | /* Track down the inline functions step by step */ |
| 1504 | while (die_find_top_inlinefunc(&spdie, (Dwarf_Addr)addr, |
| 1505 | &indie)) { |
| 1506 | /* There is an inline function */ |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1507 | if (dwarf_entrypc(&indie, &_addr) == 0 && |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1508 | _addr == addr) { |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1509 | /* |
| 1510 | * addr is at an inline function entry. |
| 1511 | * In this case, lineno should be the call-site |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1512 | * line number. (overwrite lineinfo) |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1513 | */ |
| 1514 | lineno = die_get_call_lineno(&indie); |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1515 | fname = die_get_call_file(&indie); |
| 1516 | break; |
| 1517 | } else { |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1518 | /* |
| 1519 | * addr is in an inline function body. |
| 1520 | * Since lineno points one of the lines |
| 1521 | * of the inline function, baseline should |
| 1522 | * be the entry line of the inline function. |
| 1523 | */ |
| 1524 | tmp = dwarf_diename(&indie); |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1525 | if (!tmp || |
| 1526 | dwarf_decl_line(&indie, &baseline) != 0) |
| 1527 | break; |
| 1528 | func = tmp; |
| 1529 | spdie = indie; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1530 | } |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1531 | } |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1532 | /* Verify the lineno and baseline are in a same file */ |
| 1533 | tmp = dwarf_decl_file(&spdie); |
| 1534 | if (!tmp || strcmp(tmp, fname) != 0) |
| 1535 | lineno = 0; |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1536 | } |
| 1537 | |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1538 | post: |
| 1539 | /* Make a relative line number or an offset */ |
| 1540 | if (lineno) |
| 1541 | ppt->line = lineno - baseline; |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1542 | else if (basefunc) { |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1543 | ppt->offset = addr - (unsigned long)baseaddr; |
Masami Hiramatsu | e08cfd4 | 2013-09-30 18:21:44 +0900 | [diff] [blame] | 1544 | func = basefunc; |
| 1545 | } |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1546 | |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1547 | /* Duplicate strings */ |
| 1548 | if (func) { |
| 1549 | ppt->function = strdup(func); |
Masami Hiramatsu | 02b95da | 2010-04-12 13:17:56 -0400 | [diff] [blame] | 1550 | if (ppt->function == NULL) { |
| 1551 | ret = -ENOMEM; |
| 1552 | goto end; |
| 1553 | } |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1554 | } |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1555 | if (fname) { |
| 1556 | ppt->file = strdup(fname); |
| 1557 | if (ppt->file == NULL) { |
Arnaldo Carvalho de Melo | 0466252 | 2013-12-26 17:41:15 -0300 | [diff] [blame] | 1558 | zfree(&ppt->function); |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1559 | ret = -ENOMEM; |
| 1560 | goto end; |
| 1561 | } |
| 1562 | } |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1563 | end: |
Masami Hiramatsu | 1d46ea2 | 2011-03-30 18:26:05 +0900 | [diff] [blame] | 1564 | if (ret == 0 && (fname || func)) |
| 1565 | ret = 1; /* Found a point */ |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1566 | return ret; |
| 1567 | } |
| 1568 | |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1569 | /* Add a line and store the src path */ |
| 1570 | static int line_range_add_line(const char *src, unsigned int lineno, |
| 1571 | struct line_range *lr) |
| 1572 | { |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 1573 | /* Copy source path */ |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1574 | if (!lr->path) { |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 1575 | lr->path = strdup(src); |
| 1576 | if (lr->path == NULL) |
| 1577 | return -ENOMEM; |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1578 | } |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 1579 | return intlist__add(lr->line_list, lineno); |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1580 | } |
| 1581 | |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 1582 | static int line_range_walk_cb(const char *fname, int lineno, |
Irina Tirdea | 1d037ca | 2012-09-11 01:15:03 +0300 | [diff] [blame] | 1583 | Dwarf_Addr addr __maybe_unused, |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 1584 | void *data) |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1585 | { |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 1586 | struct line_finder *lf = data; |
Namhyung Kim | 202c7c1 | 2014-04-01 13:47:57 +0900 | [diff] [blame] | 1587 | int err; |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1588 | |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 1589 | if ((strtailcmp(fname, lf->fname) != 0) || |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1590 | (lf->lno_s > lineno || lf->lno_e < lineno)) |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 1591 | return 0; |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1592 | |
Namhyung Kim | 202c7c1 | 2014-04-01 13:47:57 +0900 | [diff] [blame] | 1593 | err = line_range_add_line(fname, lineno, lf->lr); |
| 1594 | if (err < 0 && err != -EEXIST) |
| 1595 | return err; |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1596 | |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 1597 | return 0; |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1598 | } |
Masami Hiramatsu | fb1587d | 2010-03-16 18:06:19 -0400 | [diff] [blame] | 1599 | |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1600 | /* Find line range from its line number */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1601 | static int 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] | 1602 | { |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 1603 | int ret; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1604 | |
Masami Hiramatsu | 4cc9cec | 2011-01-13 21:45:58 +0900 | [diff] [blame] | 1605 | ret = die_walk_lines(sp_die ?: &lf->cu_die, line_range_walk_cb, lf); |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1606 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1607 | /* Update status */ |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1608 | if (ret >= 0) |
Masami Hiramatsu | 5a62257 | 2014-02-06 05:32:09 +0000 | [diff] [blame] | 1609 | if (!intlist__empty(lf->lr->line_list)) |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1610 | ret = lf->found = 1; |
| 1611 | else |
| 1612 | ret = 0; /* Lines are not found */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1613 | else { |
Arnaldo Carvalho de Melo | 0466252 | 2013-12-26 17:41:15 -0300 | [diff] [blame] | 1614 | zfree(&lf->lr->path); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1615 | } |
Masami Hiramatsu | f6c903f | 2010-04-14 18:40:07 -0400 | [diff] [blame] | 1616 | return ret; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1617 | } |
| 1618 | |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 1619 | static int line_range_inline_cb(Dwarf_Die *in_die, void *data) |
| 1620 | { |
Masami Hiramatsu | 182c228 | 2014-04-02 14:48:31 +0900 | [diff] [blame] | 1621 | int ret = find_line_range_by_line(in_die, data); |
Masami Hiramatsu | 36c0c58 | 2011-08-11 20:02:47 +0900 | [diff] [blame] | 1622 | |
| 1623 | /* |
| 1624 | * We have to check all instances of inlined function, because |
| 1625 | * some execution paths can be optimized out depends on the |
Masami Hiramatsu | 182c228 | 2014-04-02 14:48:31 +0900 | [diff] [blame] | 1626 | * function argument of instances. However, if an error occurs, |
| 1627 | * it should be handled by the caller. |
Masami Hiramatsu | 36c0c58 | 2011-08-11 20:02:47 +0900 | [diff] [blame] | 1628 | */ |
Masami Hiramatsu | 182c228 | 2014-04-02 14:48:31 +0900 | [diff] [blame] | 1629 | return ret < 0 ? ret : 0; |
Masami Hiramatsu | 161a26b | 2010-02-25 08:35:57 -0500 | [diff] [blame] | 1630 | } |
| 1631 | |
Masami Hiramatsu | 0dbb1ca | 2012-04-23 12:24:36 +0900 | [diff] [blame] | 1632 | /* Search function definition from function name */ |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 1633 | static int line_range_search_cb(Dwarf_Die *sp_die, void *data) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1634 | { |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1635 | struct dwarf_callback_param *param = data; |
| 1636 | struct line_finder *lf = param->data; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1637 | struct line_range *lr = lf->lr; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1638 | |
Masami Hiramatsu | 7d21635 | 2011-03-30 18:25:41 +0900 | [diff] [blame] | 1639 | /* Check declared file */ |
| 1640 | if (lr->file && strtailcmp(lr->file, dwarf_decl_file(sp_die))) |
| 1641 | return DWARF_CB_OK; |
| 1642 | |
Masami Hiramatsu | 0dbb1ca | 2012-04-23 12:24:36 +0900 | [diff] [blame] | 1643 | if (die_is_func_def(sp_die) && |
Masami Hiramatsu | 4c85935 | 2015-05-08 10:03:35 +0900 | [diff] [blame] | 1644 | die_match_name(sp_die, lr->function)) { |
Masami Hiramatsu | e92b85e | 2010-02-25 08:35:50 -0500 | [diff] [blame] | 1645 | lf->fname = dwarf_decl_file(sp_die); |
| 1646 | dwarf_decl_line(sp_die, &lr->offset); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1647 | pr_debug("fname: %s, lineno:%d\n", lf->fname, lr->offset); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1648 | lf->lno_s = lr->offset + lr->start; |
Masami Hiramatsu | d3b63d7 | 2010-04-14 18:39:42 -0400 | [diff] [blame] | 1649 | if (lf->lno_s < 0) /* Overflow */ |
| 1650 | lf->lno_s = INT_MAX; |
| 1651 | lf->lno_e = lr->offset + lr->end; |
| 1652 | if (lf->lno_e < 0) /* Overflow */ |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1653 | lf->lno_e = INT_MAX; |
Masami Hiramatsu | d3b63d7 | 2010-04-14 18:39:42 -0400 | [diff] [blame] | 1654 | pr_debug("New line range: %d to %d\n", lf->lno_s, lf->lno_e); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1655 | lr->start = lf->lno_s; |
| 1656 | lr->end = lf->lno_e; |
Masami Hiramatsu | e1ecbbc | 2015-01-30 18:37:44 +0900 | [diff] [blame] | 1657 | if (!die_is_func_instance(sp_die)) |
Masami Hiramatsu | db0d2c6 | 2011-08-11 20:03:11 +0900 | [diff] [blame] | 1658 | param->retval = die_walk_instances(sp_die, |
| 1659 | line_range_inline_cb, lf); |
| 1660 | else |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1661 | param->retval = find_line_range_by_line(sp_die, lf); |
| 1662 | return DWARF_CB_ABORT; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1663 | } |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1664 | return DWARF_CB_OK; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1665 | } |
| 1666 | |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1667 | static int find_line_range_by_func(struct line_finder *lf) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1668 | { |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1669 | struct dwarf_callback_param param = {.data = (void *)lf, .retval = 0}; |
| 1670 | dwarf_getfuncs(&lf->cu_die, line_range_search_cb, ¶m, 0); |
| 1671 | return param.retval; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1672 | } |
| 1673 | |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1674 | int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1675 | { |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1676 | struct line_finder lf = {.lr = lr, .found = 0}; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1677 | int ret = 0; |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1678 | Dwarf_Off off = 0, noff; |
| 1679 | size_t cuhl; |
| 1680 | Dwarf_Die *diep; |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 1681 | const char *comp_dir; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1682 | |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1683 | /* Fastpath: lookup by function name from .debug_pubnames section */ |
| 1684 | if (lr->function) { |
| 1685 | struct pubname_callback_param pubname_param = { |
| 1686 | .function = lr->function, .file = lr->file, |
| 1687 | .cu_die = &lf.cu_die, .sp_die = &lf.sp_die, .found = 0}; |
| 1688 | struct dwarf_callback_param line_range_param = { |
| 1689 | .data = (void *)&lf, .retval = 0}; |
| 1690 | |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1691 | dwarf_getpubnames(dbg->dbg, pubname_search_cb, |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 1692 | &pubname_param, 0); |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1693 | if (pubname_param.found) { |
| 1694 | line_range_search_cb(&lf.sp_die, &line_range_param); |
| 1695 | if (lf.found) |
| 1696 | goto found; |
| 1697 | } |
| 1698 | } |
| 1699 | |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1700 | /* Loop on CUs (Compilation Unit) */ |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1701 | while (!lf.found && ret >= 0) { |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1702 | if (dwarf_nextcu(dbg->dbg, off, &noff, &cuhl, |
Masami Hiramatsu | ff74178 | 2011-06-27 16:27:39 +0900 | [diff] [blame] | 1703 | NULL, NULL, NULL) != 0) |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1704 | break; |
| 1705 | |
| 1706 | /* Get the DIE(Debugging Information Entry) of this CU */ |
Arnaldo Carvalho de Melo | 316c713 | 2013-11-05 15:32:36 -0300 | [diff] [blame] | 1707 | diep = dwarf_offdie(dbg->dbg, off + cuhl, &lf.cu_die); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1708 | if (!diep) |
| 1709 | continue; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1710 | |
| 1711 | /* Check if target file is included. */ |
| 1712 | if (lr->file) |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 1713 | lf.fname = cu_find_realpath(&lf.cu_die, lr->file); |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1714 | else |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 1715 | lf.fname = 0; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1716 | |
Masami Hiramatsu | 2a9c8c3 | 2010-02-25 08:36:12 -0500 | [diff] [blame] | 1717 | if (!lr->file || lf.fname) { |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1718 | if (lr->function) |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1719 | ret = find_line_range_by_func(&lf); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1720 | else { |
| 1721 | lf.lno_s = lr->start; |
Masami Hiramatsu | d3b63d7 | 2010-04-14 18:39:42 -0400 | [diff] [blame] | 1722 | lf.lno_e = lr->end; |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1723 | ret = find_line_range_by_line(NULL, &lf); |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1724 | } |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1725 | } |
Masami Hiramatsu | 804b360 | 2010-02-25 08:35:42 -0500 | [diff] [blame] | 1726 | off = noff; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1727 | } |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 1728 | |
Lin Ming | cd25f8b | 2011-03-25 16:27:48 +0800 | [diff] [blame] | 1729 | found: |
Masami Hiramatsu | 6a330a3 | 2010-07-09 18:29:11 +0900 | [diff] [blame] | 1730 | /* Store comp_dir */ |
| 1731 | if (lf.found) { |
| 1732 | comp_dir = cu_get_comp_dir(&lf.cu_die); |
| 1733 | if (comp_dir) { |
| 1734 | lr->comp_dir = strdup(comp_dir); |
| 1735 | if (!lr->comp_dir) |
| 1736 | ret = -ENOMEM; |
| 1737 | } |
| 1738 | } |
| 1739 | |
Masami Hiramatsu | 7cf0b79 | 2010-07-09 18:28:59 +0900 | [diff] [blame] | 1740 | pr_debug("path: %s\n", lr->path); |
Masami Hiramatsu | b55a87a | 2010-04-12 13:17:35 -0400 | [diff] [blame] | 1741 | return (ret < 0) ? ret : lf.found; |
Masami Hiramatsu | 631c9de | 2010-01-06 09:45:34 -0500 | [diff] [blame] | 1742 | } |
| 1743 | |
Naohiro Aota | 09ed897 | 2015-03-13 14:18:40 +0900 | [diff] [blame] | 1744 | /* |
| 1745 | * Find a src file from a DWARF tag path. Prepend optional source path prefix |
| 1746 | * and chop off leading directories that do not exist. Result is passed back as |
| 1747 | * a newly allocated path on success. |
| 1748 | * Return 0 if file was found and readable, -errno otherwise. |
| 1749 | */ |
| 1750 | int get_real_path(const char *raw_path, const char *comp_dir, |
| 1751 | char **new_path) |
| 1752 | { |
| 1753 | const char *prefix = symbol_conf.source_prefix; |
| 1754 | |
| 1755 | if (!prefix) { |
| 1756 | if (raw_path[0] != '/' && comp_dir) |
| 1757 | /* If not an absolute path, try to use comp_dir */ |
| 1758 | prefix = comp_dir; |
| 1759 | else { |
| 1760 | if (access(raw_path, R_OK) == 0) { |
| 1761 | *new_path = strdup(raw_path); |
| 1762 | return *new_path ? 0 : -ENOMEM; |
| 1763 | } else |
| 1764 | return -errno; |
| 1765 | } |
| 1766 | } |
| 1767 | |
| 1768 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
| 1769 | if (!*new_path) |
| 1770 | return -ENOMEM; |
| 1771 | |
| 1772 | for (;;) { |
| 1773 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
| 1774 | |
| 1775 | if (access(*new_path, R_OK) == 0) |
| 1776 | return 0; |
| 1777 | |
| 1778 | if (!symbol_conf.source_prefix) { |
| 1779 | /* In case of searching comp_dir, don't retry */ |
| 1780 | zfree(new_path); |
| 1781 | return -errno; |
| 1782 | } |
| 1783 | |
| 1784 | switch (errno) { |
| 1785 | case ENAMETOOLONG: |
| 1786 | case ENOENT: |
| 1787 | case EROFS: |
| 1788 | case EFAULT: |
| 1789 | raw_path = strchr(++raw_path, '/'); |
| 1790 | if (!raw_path) { |
| 1791 | zfree(new_path); |
| 1792 | return -ENOENT; |
| 1793 | } |
| 1794 | continue; |
| 1795 | |
| 1796 | default: |
| 1797 | zfree(new_path); |
| 1798 | return -errno; |
| 1799 | } |
| 1800 | } |
| 1801 | } |