2 * probe-event.c : perf-probe definition to probe_events format converter
4 * Written by Masami Hiramatsu <mhiramat@redhat.com>
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.
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.
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.
22 #include <sys/utsname.h>
23 #include <sys/types.h>
43 #include <api/fs/fs.h>
44 #include "trace-event.h" /* For __maybe_unused */
45 #include "probe-event.h"
46 #include "probe-finder.h"
47 #include "probe-file.h"
50 #define MAX_CMDLEN 256
51 #define PERFPROBE_GROUP "probe"
53 bool probe_event_dry_run; /* Dry run flag */
54 struct probe_conf probe_conf;
56 #define semantic_error(msg ...) pr_err("Semantic error :" msg)
58 int e_snprintf(char *str, size_t size, const char *format, ...)
63 ret = vsnprintf(str, size, format, ap);
70 static struct machine *host_machine;
72 /* Initialize symbol maps and path of vmlinux/modules */
73 int init_probe_symbol_maps(bool user_only)
77 symbol_conf.sort_by_name = true;
78 symbol_conf.allow_aliases = true;
79 ret = symbol__init(NULL);
81 pr_debug("Failed to init symbol map.\n");
85 if (host_machine || user_only) /* already initialized */
88 if (symbol_conf.vmlinux_name)
89 pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name);
91 host_machine = machine__new_host();
93 pr_debug("machine__new_host() failed.\n");
99 pr_warning("Failed to init vmlinux path.\n");
103 void exit_probe_symbol_maps(void)
105 machine__delete(host_machine);
110 static struct symbol *__find_kernel_function_by_name(const char *name,
113 return machine__find_kernel_function_by_name(host_machine, name, mapp,
117 static struct symbol *__find_kernel_function(u64 addr, struct map **mapp)
119 return machine__find_kernel_function(host_machine, addr, mapp, NULL);
122 static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void)
124 /* kmap->ref_reloc_sym should be set if host_machine is initialized */
126 struct map *map = machine__kernel_map(host_machine);
128 if (map__load(map, NULL) < 0)
131 kmap = map__kmap(map);
134 return kmap->ref_reloc_sym;
137 static int kernel_get_symbol_address_by_name(const char *name, u64 *addr,
138 bool reloc, bool reladdr)
140 struct ref_reloc_sym *reloc_sym;
144 /* ref_reloc_sym is just a label. Need a special fix*/
145 reloc_sym = kernel_get_ref_reloc_sym();
146 if (reloc_sym && strcmp(name, reloc_sym->name) == 0)
147 *addr = (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr;
149 sym = __find_kernel_function_by_name(name, &map);
152 *addr = map->unmap_ip(map, sym->start) -
153 ((reloc) ? 0 : map->reloc) -
154 ((reladdr) ? map->start : 0);
159 static struct map *kernel_get_module_map(const char *module)
161 struct map_groups *grp = &host_machine->kmaps;
162 struct maps *maps = &grp->maps[MAP__FUNCTION];
165 /* A file path -- this is an offline module */
166 if (module && strchr(module, '/'))
167 return machine__findnew_module_map(host_machine, 0, module);
172 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
173 /* short_name is "[module]" */
174 if (strncmp(pos->dso->short_name + 1, module,
175 pos->dso->short_name_len - 2) == 0 &&
176 module[pos->dso->short_name_len - 2] == '\0') {
183 static struct map *get_target_map(const char *target, bool user)
185 /* Init maps of given executable or kernel */
187 return dso__new_map(target);
189 return kernel_get_module_map(target);
192 static void put_target_map(struct map *map, bool user)
195 /* Only the user map needs to be released */
201 static int convert_exec_to_group(const char *exec, char **result)
203 char *ptr1, *ptr2, *exec_copy;
207 exec_copy = strdup(exec);
211 ptr1 = basename(exec_copy);
217 ptr2 = strpbrk(ptr1, "-._");
220 ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1);
224 *result = strdup(buf);
225 ret = *result ? 0 : -ENOMEM;
232 static void clear_perf_probe_point(struct perf_probe_point *pp)
239 static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs)
243 for (i = 0; i < ntevs; i++)
244 clear_probe_trace_event(tevs + i);
247 static bool kprobe_blacklist__listed(unsigned long address);
248 static bool kprobe_warn_out_range(const char *symbol, unsigned long address)
253 /* Get the address of _etext for checking non-probable text symbol */
254 ret = kernel_get_symbol_address_by_name("_etext", &etext_addr,
257 if (ret == 0 && etext_addr < address)
258 pr_warning("%s is out of .text, skip it.\n", symbol);
259 else if (kprobe_blacklist__listed(address))
260 pr_warning("%s is blacklisted function, skip it.\n", symbol);
269 * '.gnu.linkonce.this_module' section of kernel module elf directly
270 * maps to 'struct module' from linux/module.h. This section contains
271 * actual module name which will be used by kernel after loading it.
272 * But, we cannot use 'struct module' here since linux/module.h is not
273 * exposed to user-space. Offset of 'name' has remained same from long
274 * time, so hardcoding it here.
277 #define MOD_NAME_OFFSET 24
279 #define MOD_NAME_OFFSET 12
283 * @module can be module name of module file path. In case of path,
284 * inspect elf and find out what is actual module name.
285 * Caller has to free mod_name after using it.
287 static char *find_module_name(const char *module)
295 char *mod_name = NULL;
297 fd = open(module, O_RDONLY);
301 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
305 if (gelf_getehdr(elf, &ehdr) == NULL)
308 sec = elf_section_by_name(elf, &ehdr, &shdr,
309 ".gnu.linkonce.this_module", NULL);
313 data = elf_getdata(sec, NULL);
314 if (!data || !data->d_buf)
317 mod_name = strdup((char *)data->d_buf + MOD_NAME_OFFSET);
326 #ifdef HAVE_DWARF_SUPPORT
328 static int kernel_get_module_dso(const char *module, struct dso **pdso)
332 const char *vmlinux_name;
336 char module_name[128];
338 snprintf(module_name, sizeof(module_name), "[%s]", module);
339 map = map_groups__find_by_name(&host_machine->kmaps, MAP__FUNCTION, module_name);
344 pr_debug("Failed to find module %s.\n", module);
348 map = machine__kernel_map(host_machine);
351 vmlinux_name = symbol_conf.vmlinux_name;
354 ret = dso__load_vmlinux(dso, map, vmlinux_name, false, NULL);
356 ret = dso__load_vmlinux_path(dso, map, NULL);
363 * Some binaries like glibc have special symbols which are on the symbol
364 * table, but not in the debuginfo. If we can find the address of the
365 * symbol from map, we can translate the address back to the probe point.
367 static int find_alternative_probe_point(struct debuginfo *dinfo,
368 struct perf_probe_point *pp,
369 struct perf_probe_point *result,
370 const char *target, bool uprobes)
372 struct map *map = NULL;
377 /* This can work only for function-name based one */
378 if (!pp->function || pp->file)
381 map = get_target_map(target, uprobes);
385 /* Find the address of given function */
386 map__for_each_symbol_by_name(map, pp->function, sym) {
388 address = sym->start;
390 address = map->unmap_ip(map, sym->start) - map->reloc;
397 pr_debug("Symbol %s address found : %" PRIx64 "\n",
398 pp->function, address);
400 ret = debuginfo__find_probe_point(dinfo, (unsigned long)address,
403 ret = (!ret) ? -ENOENT : ret;
405 result->offset += pp->offset;
406 result->line += pp->line;
407 result->retprobe = pp->retprobe;
412 put_target_map(map, uprobes);
417 static int get_alternative_probe_event(struct debuginfo *dinfo,
418 struct perf_probe_event *pev,
419 struct perf_probe_point *tmp)
423 memcpy(tmp, &pev->point, sizeof(*tmp));
424 memset(&pev->point, 0, sizeof(pev->point));
425 ret = find_alternative_probe_point(dinfo, tmp, &pev->point,
426 pev->target, pev->uprobes);
428 memcpy(&pev->point, tmp, sizeof(*tmp));
433 static int get_alternative_line_range(struct debuginfo *dinfo,
434 struct line_range *lr,
435 const char *target, bool user)
437 struct perf_probe_point pp = { .function = lr->function,
440 struct perf_probe_point result;
443 memset(&result, 0, sizeof(result));
445 if (lr->end != INT_MAX)
446 len = lr->end - lr->start;
447 ret = find_alternative_probe_point(dinfo, &pp, &result,
450 lr->function = result.function;
451 lr->file = result.file;
452 lr->start = result.line;
453 if (lr->end != INT_MAX)
454 lr->end = lr->start + len;
455 clear_perf_probe_point(&pp);
460 /* Open new debuginfo of given module */
461 static struct debuginfo *open_debuginfo(const char *module, bool silent)
463 const char *path = module;
464 char reason[STRERR_BUFSIZE];
465 struct debuginfo *ret = NULL;
466 struct dso *dso = NULL;
469 if (!module || !strchr(module, '/')) {
470 err = kernel_get_module_dso(module, &dso);
472 if (!dso || dso->load_errno == 0) {
473 if (!str_error_r(-err, reason, STRERR_BUFSIZE))
474 strcpy(reason, "(unknown)");
476 dso__strerror_load(dso, reason, STRERR_BUFSIZE);
478 pr_err("Failed to find the path for %s: %s\n",
479 module ?: "kernel", reason);
482 path = dso->long_name;
484 ret = debuginfo__new(path);
485 if (!ret && !silent) {
486 pr_warning("The %s file has no debug information.\n", path);
487 if (!module || !strtailcmp(path, ".ko"))
488 pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, ");
490 pr_warning("Rebuild with -g, ");
491 pr_warning("or install an appropriate debuginfo package.\n");
496 /* For caching the last debuginfo */
497 static struct debuginfo *debuginfo_cache;
498 static char *debuginfo_cache_path;
500 static struct debuginfo *debuginfo_cache__open(const char *module, bool silent)
502 const char *path = module;
504 /* If the module is NULL, it should be the kernel. */
508 if (debuginfo_cache_path && !strcmp(debuginfo_cache_path, path))
511 /* Copy module path */
512 free(debuginfo_cache_path);
513 debuginfo_cache_path = strdup(path);
514 if (!debuginfo_cache_path) {
515 debuginfo__delete(debuginfo_cache);
516 debuginfo_cache = NULL;
520 debuginfo_cache = open_debuginfo(module, silent);
521 if (!debuginfo_cache)
522 zfree(&debuginfo_cache_path);
524 return debuginfo_cache;
527 static void debuginfo_cache__exit(void)
529 debuginfo__delete(debuginfo_cache);
530 debuginfo_cache = NULL;
531 zfree(&debuginfo_cache_path);
535 static int get_text_start_address(const char *exec, unsigned long *address)
540 int fd, ret = -ENOENT;
542 fd = open(exec, O_RDONLY);
546 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
552 if (gelf_getehdr(elf, &ehdr) == NULL)
555 if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL))
558 *address = shdr.sh_addr - shdr.sh_offset;
569 * Convert trace point to probe point with debuginfo
571 static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
572 struct perf_probe_point *pp,
575 struct debuginfo *dinfo = NULL;
576 unsigned long stext = 0;
577 u64 addr = tp->address;
580 /* convert the address to dwarf address */
586 ret = get_text_start_address(tp->module, &stext);
590 } else if (tp->symbol) {
591 /* If the module is given, this returns relative address */
592 ret = kernel_get_symbol_address_by_name(tp->symbol, &addr,
593 false, !!tp->module);
599 pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
600 tp->module ? : "kernel");
602 dinfo = debuginfo_cache__open(tp->module, verbose == 0);
604 ret = debuginfo__find_probe_point(dinfo,
605 (unsigned long)addr, pp);
610 pp->retprobe = tp->retprobe;
614 pr_debug("Failed to find corresponding probes from debuginfo.\n");
615 return ret ? : -ENOENT;
618 static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
619 int ntevs, const char *exec)
622 unsigned long stext = 0;
627 ret = get_text_start_address(exec, &stext);
631 for (i = 0; i < ntevs && ret >= 0; i++) {
632 /* point.address is the addres of point.symbol + point.offset */
633 tevs[i].point.address -= stext;
634 tevs[i].point.module = strdup(exec);
635 if (!tevs[i].point.module) {
639 tevs[i].uprobes = true;
645 static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
646 int ntevs, const char *module)
649 char *mod_name = NULL;
654 mod_name = find_module_name(module);
656 for (i = 0; i < ntevs; i++) {
657 tevs[i].point.module =
658 strdup(mod_name ? mod_name : module);
659 if (!tevs[i].point.module) {
669 /* Post processing the probe events */
670 static int post_process_probe_trace_events(struct probe_trace_event *tevs,
671 int ntevs, const char *module,
674 struct ref_reloc_sym *reloc_sym;
679 return add_exec_to_probe_trace_events(tevs, ntevs, module);
681 /* Note that currently ref_reloc_sym based probe is not for drivers */
683 return add_module_to_probe_trace_events(tevs, ntevs, module);
685 reloc_sym = kernel_get_ref_reloc_sym();
687 pr_warning("Relocated base symbol is not found!\n");
691 for (i = 0; i < ntevs; i++) {
692 if (!tevs[i].point.address || tevs[i].point.retprobe)
694 /* If we found a wrong one, mark it by NULL symbol */
695 if (kprobe_warn_out_range(tevs[i].point.symbol,
696 tevs[i].point.address)) {
700 tmp = strdup(reloc_sym->name);
704 /* If we have no realname, use symbol for it */
705 if (!tevs[i].point.realname)
706 tevs[i].point.realname = tevs[i].point.symbol;
708 free(tevs[i].point.symbol);
709 tevs[i].point.symbol = tmp;
710 tevs[i].point.offset = tevs[i].point.address -
711 reloc_sym->unrelocated_addr;
716 /* Try to find perf_probe_event with debuginfo */
717 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
718 struct probe_trace_event **tevs)
720 bool need_dwarf = perf_probe_event_need_dwarf(pev);
721 struct perf_probe_point tmp;
722 struct debuginfo *dinfo;
725 dinfo = open_debuginfo(pev->target, !need_dwarf);
729 pr_debug("Could not open debuginfo. Try to use symbols.\n");
733 pr_debug("Try to find probe point from debuginfo.\n");
734 /* Searching trace events corresponding to a probe event */
735 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
737 if (ntevs == 0) { /* Not found, retry with an alternative */
738 ret = get_alternative_probe_event(dinfo, pev, &tmp);
740 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
742 * Write back to the original probe_event for
743 * setting appropriate (user given) event name
745 clear_perf_probe_point(&pev->point);
746 memcpy(&pev->point, &tmp, sizeof(tmp));
750 debuginfo__delete(dinfo);
752 if (ntevs > 0) { /* Succeeded to find trace events */
753 pr_debug("Found %d probe_trace_events.\n", ntevs);
754 ret = post_process_probe_trace_events(*tevs, ntevs,
755 pev->target, pev->uprobes);
756 if (ret < 0 || ret == ntevs) {
757 clear_probe_trace_events(*tevs, ntevs);
761 return ret < 0 ? ret : ntevs;
766 if (ntevs == 0) { /* No error but failed to find probe point. */
767 pr_warning("Probe point '%s' not found.\n",
768 synthesize_perf_probe_point(&pev->point));
771 /* Error path : ntevs < 0 */
772 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
775 pr_warning("Warning: No dwarf info found in the vmlinux - "
776 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
778 pr_debug("Trying to use symbols.\n");
785 #define LINEBUF_SIZE 256
786 #define NR_ADDITIONAL_LINES 2
788 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
790 char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE];
791 const char *color = show_num ? "" : PERF_COLOR_BLUE;
792 const char *prefix = NULL;
795 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
800 prefix = show_num ? "%7d " : " ";
801 color_fprintf(stdout, color, prefix, l);
803 color_fprintf(stdout, color, "%s", buf);
805 } while (strchr(buf, '\n') == NULL);
810 pr_warning("File read error: %s\n",
811 str_error_r(errno, sbuf, sizeof(sbuf)));
817 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
819 int rv = __show_one_line(fp, l, skip, show_num);
821 pr_warning("Source file is shorter than expected.\n");
827 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
828 #define show_one_line(f,l) _show_one_line(f,l,false,false)
829 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
830 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
833 * Show line-range always requires debuginfo to find source file and
836 static int __show_line_range(struct line_range *lr, const char *module,
841 struct debuginfo *dinfo;
845 char sbuf[STRERR_BUFSIZE];
847 /* Search a line range */
848 dinfo = open_debuginfo(module, false);
852 ret = debuginfo__find_line_range(dinfo, lr);
853 if (!ret) { /* Not found, retry with an alternative */
854 ret = get_alternative_line_range(dinfo, lr, module, user);
856 ret = debuginfo__find_line_range(dinfo, lr);
858 debuginfo__delete(dinfo);
859 if (ret == 0 || ret == -ENOENT) {
860 pr_warning("Specified source line is not found.\n");
862 } else if (ret < 0) {
863 pr_warning("Debuginfo analysis failed.\n");
867 /* Convert source file path */
869 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
871 /* Free old path when new path is assigned */
876 pr_warning("Failed to find source file path.\n");
883 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
884 lr->start - lr->offset);
886 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
888 fp = fopen(lr->path, "r");
890 pr_warning("Failed to open %s: %s\n", lr->path,
891 str_error_r(errno, sbuf, sizeof(sbuf)));
894 /* Skip to starting line number */
895 while (l < lr->start) {
896 ret = skip_one_line(fp, l++);
901 intlist__for_each_entry(ln, lr->line_list) {
902 for (; ln->i > l; l++) {
903 ret = show_one_line(fp, l - lr->offset);
907 ret = show_one_line_with_num(fp, l++ - lr->offset);
912 if (lr->end == INT_MAX)
913 lr->end = l + NR_ADDITIONAL_LINES;
914 while (l <= lr->end) {
915 ret = show_one_line_or_eof(fp, l++ - lr->offset);
924 int show_line_range(struct line_range *lr, const char *module, bool user)
928 ret = init_probe_symbol_maps(user);
931 ret = __show_line_range(lr, module, user);
932 exit_probe_symbol_maps();
937 static int show_available_vars_at(struct debuginfo *dinfo,
938 struct perf_probe_event *pev,
939 struct strfilter *_filter)
943 struct str_node *node;
944 struct variable_list *vls = NULL, *vl;
945 struct perf_probe_point tmp;
948 buf = synthesize_perf_probe_point(&pev->point);
951 pr_debug("Searching variables at %s\n", buf);
953 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls);
954 if (!ret) { /* Not found, retry with an alternative */
955 ret = get_alternative_probe_event(dinfo, pev, &tmp);
957 ret = debuginfo__find_available_vars_at(dinfo, pev,
959 /* Release the old probe_point */
960 clear_perf_probe_point(&tmp);
964 if (ret == 0 || ret == -ENOENT) {
965 pr_err("Failed to find the address of %s\n", buf);
968 pr_warning("Debuginfo analysis failed.\n");
972 /* Some variables are found */
973 fprintf(stdout, "Available variables at %s\n", buf);
974 for (i = 0; i < ret; i++) {
977 * A probe point might be converted to
978 * several trace points.
980 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
982 zfree(&vl->point.symbol);
985 strlist__for_each_entry(node, vl->vars) {
986 var = strchr(node->s, '\t') + 1;
987 if (strfilter__compare(_filter, var)) {
988 fprintf(stdout, "\t\t%s\n", node->s);
992 strlist__delete(vl->vars);
995 fprintf(stdout, "\t\t(No matched variables)\n");
1003 /* Show available variables on given probe point */
1004 int show_available_vars(struct perf_probe_event *pevs, int npevs,
1005 struct strfilter *_filter)
1008 struct debuginfo *dinfo;
1010 ret = init_probe_symbol_maps(pevs->uprobes);
1014 dinfo = open_debuginfo(pevs->target, false);
1022 for (i = 0; i < npevs && ret >= 0; i++)
1023 ret = show_available_vars_at(dinfo, &pevs[i], _filter);
1025 debuginfo__delete(dinfo);
1027 exit_probe_symbol_maps();
1031 #else /* !HAVE_DWARF_SUPPORT */
1033 static void debuginfo_cache__exit(void)
1038 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
1039 struct perf_probe_point *pp __maybe_unused,
1040 bool is_kprobe __maybe_unused)
1045 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
1046 struct probe_trace_event **tevs __maybe_unused)
1048 if (perf_probe_event_need_dwarf(pev)) {
1049 pr_warning("Debuginfo-analysis is not supported.\n");
1056 int show_line_range(struct line_range *lr __maybe_unused,
1057 const char *module __maybe_unused,
1058 bool user __maybe_unused)
1060 pr_warning("Debuginfo-analysis is not supported.\n");
1064 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
1065 int npevs __maybe_unused,
1066 struct strfilter *filter __maybe_unused)
1068 pr_warning("Debuginfo-analysis is not supported.\n");
1073 void line_range__clear(struct line_range *lr)
1079 intlist__delete(lr->line_list);
1080 memset(lr, 0, sizeof(*lr));
1083 int line_range__init(struct line_range *lr)
1085 memset(lr, 0, sizeof(*lr));
1086 lr->line_list = intlist__new(NULL);
1093 static int parse_line_num(char **ptr, int *val, const char *what)
1095 const char *start = *ptr;
1098 *val = strtol(*ptr, ptr, 0);
1099 if (errno || *ptr == start) {
1100 semantic_error("'%s' is not a valid number.\n", what);
1106 /* Check the name is good for event, group or function */
1107 static bool is_c_func_name(const char *name)
1109 if (!isalpha(*name) && *name != '_')
1111 while (*++name != '\0') {
1112 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
1119 * Stuff 'lr' according to the line range described by 'arg'.
1120 * The line range syntax is described by:
1122 * SRC[:SLN[+NUM|-ELN]]
1123 * FNC[@SRC][:SLN[+NUM|-ELN]]
1125 int parse_line_range_desc(const char *arg, struct line_range *lr)
1127 char *range, *file, *name = strdup(arg);
1136 range = strchr(name, ':');
1140 err = parse_line_num(&range, &lr->start, "start line");
1144 if (*range == '+' || *range == '-') {
1145 const char c = *range++;
1147 err = parse_line_num(&range, &lr->end, "end line");
1152 lr->end += lr->start;
1154 * Adjust the number of lines here.
1155 * If the number of lines == 1, the
1156 * the end of line should be equal to
1157 * the start of line.
1163 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
1166 if (lr->start > lr->end) {
1167 semantic_error("Start line must be smaller"
1168 " than end line.\n");
1171 if (*range != '\0') {
1172 semantic_error("Tailing with invalid str '%s'.\n", range);
1177 file = strchr(name, '@');
1180 lr->file = strdup(++file);
1181 if (lr->file == NULL) {
1185 lr->function = name;
1186 } else if (strchr(name, '/') || strchr(name, '.'))
1188 else if (is_c_func_name(name))/* We reuse it for checking funcname */
1189 lr->function = name;
1190 else { /* Invalid name */
1191 semantic_error("'%s' is not a valid function name.\n", name);
1202 static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev)
1206 ptr = strchr(*arg, ':');
1209 if (!pev->sdt && !is_c_func_name(*arg))
1211 pev->group = strdup(*arg);
1217 if (!pev->sdt && !is_c_func_name(*arg)) {
1219 semantic_error("%s is bad for event name -it must "
1220 "follow C symbol-naming rule.\n", *arg);
1223 pev->event = strdup(*arg);
1224 if (pev->event == NULL)
1230 /* Parse probepoint definition. */
1231 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
1233 struct perf_probe_point *pp = &pev->point;
1236 bool file_spec = false;
1241 * perf probe [GRP:][EVENT=]SRC[:LN|;PTN]
1242 * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
1243 * perf probe %[GRP:]SDT_EVENT
1249 * If the probe point starts with '%',
1250 * or starts with "sdt_" and has a ':' but no '=',
1251 * then it should be a SDT/cached probe point.
1253 if (arg[0] == '%' ||
1254 (!strncmp(arg, "sdt_", 4) &&
1255 !!strchr(arg, ':') && !strchr(arg, '='))) {
1261 ptr = strpbrk(arg, ";=@+%");
1265 semantic_error("%s must be an SDT name.\n",
1269 /* This must be a target file name or build id */
1270 tmp = build_id_cache__complement(ptr + 1);
1272 pev->target = build_id_cache__origname(tmp);
1275 pev->target = strdup(ptr + 1);
1280 ret = parse_perf_probe_event_name(&arg, pev);
1282 if (asprintf(&pev->point.function, "%%%s", pev->event) < 0)
1288 if (ptr && *ptr == '=') { /* Event name */
1291 ret = parse_perf_probe_event_name(&arg, pev);
1299 * Check arg is function or file name and copy it.
1301 * We consider arg to be a file spec if and only if it satisfies
1302 * all of the below criteria::
1303 * - it does not include any of "+@%",
1304 * - it includes one of ":;", and
1305 * - it has a period '.' in the name.
1307 * Otherwise, we consider arg to be a function specification.
1309 if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) {
1310 /* This is a file spec if it includes a '.' before ; or : */
1311 if (memchr(arg, '.', ptr - arg))
1315 ptr = strpbrk(arg, ";:+@%");
1335 * Keep pp->function even if this is absolute address,
1336 * so it can mark whether abs_address is valid.
1337 * Which make 'perf probe lib.bin 0x0' possible.
1339 * Note that checking length of tmp is not needed
1340 * because when we access tmp[1] we know tmp[0] is '0',
1341 * so tmp[1] should always valid (but could be '\0').
1343 if (tmp && !strncmp(tmp, "0x", 2)) {
1344 pp->abs_address = strtoul(pp->function, &tmp, 0);
1346 semantic_error("Invalid absolute address.\n");
1352 /* Parse other options */
1356 if (c == ';') { /* Lazy pattern must be the last part */
1357 pp->lazy_line = strdup(arg);
1358 if (pp->lazy_line == NULL)
1362 ptr = strpbrk(arg, ";:+@%");
1368 case ':': /* Line number */
1369 pp->line = strtoul(arg, &tmp, 0);
1371 semantic_error("There is non-digit char"
1372 " in line number.\n");
1376 case '+': /* Byte offset from a symbol */
1377 pp->offset = strtoul(arg, &tmp, 0);
1379 semantic_error("There is non-digit character"
1384 case '@': /* File name */
1386 semantic_error("SRC@SRC is not allowed.\n");
1389 pp->file = strdup(arg);
1390 if (pp->file == NULL)
1393 case '%': /* Probe places */
1394 if (strcmp(arg, "return") == 0) {
1396 } else { /* Others not supported yet */
1397 semantic_error("%%%s is not supported.\n", arg);
1401 default: /* Buggy case */
1402 pr_err("This program has a bug at %s:%d.\n",
1403 __FILE__, __LINE__);
1409 /* Exclusion check */
1410 if (pp->lazy_line && pp->line) {
1411 semantic_error("Lazy pattern can't be used with"
1416 if (pp->lazy_line && pp->offset) {
1417 semantic_error("Lazy pattern can't be used with offset.\n");
1421 if (pp->line && pp->offset) {
1422 semantic_error("Offset can't be used with line number.\n");
1426 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1427 semantic_error("File always requires line number or "
1432 if (pp->offset && !pp->function) {
1433 semantic_error("Offset requires an entry function.\n");
1437 if (pp->retprobe && !pp->function) {
1438 semantic_error("Return probe requires an entry function.\n");
1442 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1443 semantic_error("Offset/Line/Lazy pattern can't be used with "
1448 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1449 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1454 /* Parse perf-probe event argument */
1455 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1457 char *tmp, *goodname;
1458 struct perf_probe_arg_field **fieldp;
1460 pr_debug("parsing arg: %s into ", str);
1462 tmp = strchr(str, '=');
1464 arg->name = strndup(str, tmp - str);
1465 if (arg->name == NULL)
1467 pr_debug("name:%s ", arg->name);
1471 tmp = strchr(str, ':');
1472 if (tmp) { /* Type setting */
1474 arg->type = strdup(tmp + 1);
1475 if (arg->type == NULL)
1477 pr_debug("type:%s ", arg->type);
1480 tmp = strpbrk(str, "-.[");
1481 if (!is_c_varname(str) || !tmp) {
1482 /* A variable, register, symbol or special value */
1483 arg->var = strdup(str);
1484 if (arg->var == NULL)
1486 pr_debug("%s\n", arg->var);
1490 /* Structure fields or array element */
1491 arg->var = strndup(str, tmp - str);
1492 if (arg->var == NULL)
1494 goodname = arg->var;
1495 pr_debug("%s, ", arg->var);
1496 fieldp = &arg->field;
1499 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1500 if (*fieldp == NULL)
1502 if (*tmp == '[') { /* Array */
1504 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1505 (*fieldp)->ref = true;
1506 if (*tmp != ']' || tmp == str + 1) {
1507 semantic_error("Array index must be a"
1514 } else { /* Structure */
1517 (*fieldp)->ref = false;
1518 } else if (tmp[1] == '>') {
1520 (*fieldp)->ref = true;
1522 semantic_error("Argument parse error: %s\n",
1526 tmp = strpbrk(str, "-.[");
1529 (*fieldp)->name = strndup(str, tmp - str);
1530 if ((*fieldp)->name == NULL)
1533 goodname = (*fieldp)->name;
1534 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1535 fieldp = &(*fieldp)->next;
1538 (*fieldp)->name = strdup(str);
1539 if ((*fieldp)->name == NULL)
1542 goodname = (*fieldp)->name;
1543 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1545 /* If no name is specified, set the last field name (not array index)*/
1547 arg->name = strdup(goodname);
1548 if (arg->name == NULL)
1554 /* Parse perf-probe event command */
1555 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1558 int argc, i, ret = 0;
1560 argv = argv_split(cmd, &argc);
1562 pr_debug("Failed to split arguments.\n");
1565 if (argc - 1 > MAX_PROBE_ARGS) {
1566 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1570 /* Parse probe point */
1571 ret = parse_perf_probe_point(argv[0], pev);
1575 /* Copy arguments and ensure return probe has no C argument */
1576 pev->nargs = argc - 1;
1577 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1578 if (pev->args == NULL) {
1582 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1583 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1585 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1586 semantic_error("You can't specify local variable for"
1597 /* Return true if this perf_probe_event requires debuginfo */
1598 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1602 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1605 for (i = 0; i < pev->nargs; i++)
1606 if (is_c_varname(pev->args[i].var) ||
1607 !strcmp(pev->args[i].var, "$params") ||
1608 !strcmp(pev->args[i].var, "$vars"))
1614 /* Parse probe_events event into struct probe_point */
1615 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev)
1617 struct probe_trace_point *tp = &tev->point;
1620 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1624 pr_debug("Parsing probe_events: %s\n", cmd);
1625 argv = argv_split(cmd, &argc);
1627 pr_debug("Failed to split arguments.\n");
1631 semantic_error("Too few probe arguments.\n");
1636 /* Scan event and group name. */
1637 argv0_str = strdup(argv[0]);
1638 if (argv0_str == NULL) {
1642 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1643 fmt2_str = strtok_r(NULL, "/", &fmt);
1644 fmt3_str = strtok_r(NULL, " \t", &fmt);
1645 if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
1646 || fmt3_str == NULL) {
1647 semantic_error("Failed to parse event name: %s\n", argv[0]);
1652 tev->group = strdup(fmt2_str);
1653 tev->event = strdup(fmt3_str);
1654 if (tev->group == NULL || tev->event == NULL) {
1658 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1660 tp->retprobe = (pr == 'r');
1662 /* Scan module name(if there), function name and offset */
1663 p = strchr(argv[1], ':');
1665 tp->module = strndup(argv[1], p - argv[1]);
1670 tev->uprobes = (tp->module[0] == '/');
1674 fmt1_str = strtok_r(p, "+", &fmt);
1675 /* only the address started with 0x */
1676 if (fmt1_str[0] == '0') {
1678 * Fix a special case:
1679 * if address == 0, kernel reports something like:
1680 * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax
1681 * Newer kernel may fix that, but we want to
1682 * support old kernel also.
1684 if (strcmp(fmt1_str, "0x") == 0) {
1685 if (!argv[2] || strcmp(argv[2], "(null)")) {
1692 for (i = 2; argv[i + 1] != NULL; i++)
1693 argv[i] = argv[i + 1];
1698 tp->address = strtoul(fmt1_str, NULL, 0);
1700 /* Only the symbol-based probe has offset */
1701 tp->symbol = strdup(fmt1_str);
1702 if (tp->symbol == NULL) {
1706 fmt2_str = strtok_r(NULL, "", &fmt);
1707 if (fmt2_str == NULL)
1710 tp->offset = strtoul(fmt2_str, NULL, 10);
1713 tev->nargs = argc - 2;
1714 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1715 if (tev->args == NULL) {
1719 for (i = 0; i < tev->nargs; i++) {
1720 p = strchr(argv[i + 2], '=');
1721 if (p) /* We don't need which register is assigned. */
1725 tev->args[i].name = strdup(argv[i + 2]);
1726 /* TODO: parse regs and offset */
1727 tev->args[i].value = strdup(p);
1728 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1740 /* Compose only probe arg */
1741 char *synthesize_perf_probe_arg(struct perf_probe_arg *pa)
1743 struct perf_probe_arg_field *field = pa->field;
1748 if (strbuf_init(&buf, 64) < 0)
1751 if (pa->name && pa->var)
1752 err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var);
1754 err = strbuf_addstr(&buf, pa->name ?: pa->var);
1759 if (field->name[0] == '[')
1760 err = strbuf_addstr(&buf, field->name);
1762 err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".",
1764 field = field->next;
1770 if (strbuf_addf(&buf, ":%s", pa->type) < 0)
1773 ret = strbuf_detach(&buf, NULL);
1775 strbuf_release(&buf);
1779 /* Compose only probe point (not argument) */
1780 char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1783 char *tmp, *ret = NULL;
1786 if (strbuf_init(&buf, 64) < 0)
1790 if (strbuf_addstr(&buf, pp->function) < 0)
1793 err = strbuf_addf(&buf, "+%lu", pp->offset);
1795 err = strbuf_addf(&buf, ":%d", pp->line);
1796 else if (pp->retprobe)
1797 err = strbuf_addstr(&buf, "%return");
1805 tmp = strchr(pp->file + len - 30, '/');
1806 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1808 err = strbuf_addf(&buf, "@%s", tmp);
1809 if (!err && !pp->function && pp->line)
1810 err = strbuf_addf(&buf, ":%d", pp->line);
1813 ret = strbuf_detach(&buf, NULL);
1815 strbuf_release(&buf);
1819 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1822 char *tmp, *ret = NULL;
1825 if (strbuf_init(&buf, 64))
1828 if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP,
1832 tmp = synthesize_perf_probe_point(&pev->point);
1833 if (!tmp || strbuf_addstr(&buf, tmp) < 0)
1837 for (i = 0; i < pev->nargs; i++) {
1838 tmp = synthesize_perf_probe_arg(pev->args + i);
1839 if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0)
1844 ret = strbuf_detach(&buf, NULL);
1846 strbuf_release(&buf);
1850 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1851 struct strbuf *buf, int depth)
1855 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1860 err = strbuf_addf(buf, "%+ld(", ref->offset);
1861 return (err < 0) ? err : depth;
1864 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1867 struct probe_trace_arg_ref *ref = arg->ref;
1870 /* Argument name or separator */
1872 err = strbuf_addf(buf, " %s=", arg->name);
1874 err = strbuf_addch(buf, ' ');
1878 /* Special case: @XXX */
1879 if (arg->value[0] == '@' && arg->ref)
1882 /* Dereferencing arguments */
1884 depth = __synthesize_probe_trace_arg_ref(ref, buf, 1);
1889 /* Print argument value */
1890 if (arg->value[0] == '@' && arg->ref)
1891 err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset);
1893 err = strbuf_addstr(buf, arg->value);
1896 while (!err && depth--)
1897 err = strbuf_addch(buf, ')');
1899 /* Print argument type */
1900 if (!err && arg->type)
1901 err = strbuf_addf(buf, ":%s", arg->type);
1906 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
1908 struct probe_trace_point *tp = &tev->point;
1913 /* Uprobes must have tp->module */
1914 if (tev->uprobes && !tp->module)
1917 if (strbuf_init(&buf, 32) < 0)
1920 if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
1921 tev->group, tev->event) < 0)
1924 * If tp->address == 0, then this point must be a
1925 * absolute address uprobe.
1926 * try_to_find_absolute_address() should have made
1927 * tp->symbol to "0x0".
1929 if (tev->uprobes && !tp->address) {
1930 if (!tp->symbol || strcmp(tp->symbol, "0x0"))
1934 /* Use the tp->address for uprobes */
1936 err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address);
1937 else if (!strncmp(tp->symbol, "0x", 2))
1938 /* Absolute address. See try_to_find_absolute_address() */
1939 err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "",
1940 tp->module ? ":" : "", tp->address);
1942 err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "",
1943 tp->module ? ":" : "", tp->symbol, tp->offset);
1947 for (i = 0; i < tev->nargs; i++)
1948 if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0)
1951 ret = strbuf_detach(&buf, NULL);
1953 strbuf_release(&buf);
1957 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
1958 struct perf_probe_point *pp,
1961 struct symbol *sym = NULL;
1963 u64 addr = tp->address;
1967 map = dso__new_map(tp->module);
1970 sym = map__find_symbol(map, addr, NULL);
1972 if (tp->symbol && !addr) {
1973 if (kernel_get_symbol_address_by_name(tp->symbol,
1974 &addr, true, false) < 0)
1979 sym = __find_kernel_function(addr, &map);
1986 pp->retprobe = tp->retprobe;
1987 pp->offset = addr - map->unmap_ip(map, sym->start);
1988 pp->function = strdup(sym->name);
1989 ret = pp->function ? 0 : -ENOMEM;
1992 if (map && !is_kprobe) {
1999 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
2000 struct perf_probe_point *pp,
2006 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
2009 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
2013 pr_debug("Failed to find probe point from both of dwarf and map.\n");
2016 pp->function = strdup(tp->symbol);
2017 pp->offset = tp->offset;
2019 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
2022 pp->function = strdup(buf);
2025 if (pp->function == NULL)
2028 pp->retprobe = tp->retprobe;
2033 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
2034 struct perf_probe_event *pev, bool is_kprobe)
2036 struct strbuf buf = STRBUF_INIT;
2039 /* Convert event/group name */
2040 pev->event = strdup(tev->event);
2041 pev->group = strdup(tev->group);
2042 if (pev->event == NULL || pev->group == NULL)
2045 /* Convert trace_point to probe_point */
2046 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
2050 /* Convert trace_arg to probe_arg */
2051 pev->nargs = tev->nargs;
2052 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
2053 if (pev->args == NULL)
2055 for (i = 0; i < tev->nargs && ret >= 0; i++) {
2056 if (tev->args[i].name)
2057 pev->args[i].name = strdup(tev->args[i].name);
2059 if ((ret = strbuf_init(&buf, 32)) < 0)
2061 ret = synthesize_probe_trace_arg(&tev->args[i], &buf);
2062 pev->args[i].name = strbuf_detach(&buf, NULL);
2064 if (pev->args[i].name == NULL && ret >= 0)
2069 clear_perf_probe_event(pev);
2074 void clear_perf_probe_event(struct perf_probe_event *pev)
2076 struct perf_probe_arg_field *field, *next;
2082 clear_perf_probe_point(&pev->point);
2084 for (i = 0; i < pev->nargs; i++) {
2085 free(pev->args[i].name);
2086 free(pev->args[i].var);
2087 free(pev->args[i].type);
2088 field = pev->args[i].field;
2091 zfree(&field->name);
2097 memset(pev, 0, sizeof(*pev));
2100 #define strdup_or_goto(str, label) \
2101 ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; })
2103 static int perf_probe_point__copy(struct perf_probe_point *dst,
2104 struct perf_probe_point *src)
2106 dst->file = strdup_or_goto(src->file, out_err);
2107 dst->function = strdup_or_goto(src->function, out_err);
2108 dst->lazy_line = strdup_or_goto(src->lazy_line, out_err);
2109 dst->line = src->line;
2110 dst->retprobe = src->retprobe;
2111 dst->offset = src->offset;
2115 clear_perf_probe_point(dst);
2119 static int perf_probe_arg__copy(struct perf_probe_arg *dst,
2120 struct perf_probe_arg *src)
2122 struct perf_probe_arg_field *field, **ppfield;
2124 dst->name = strdup_or_goto(src->name, out_err);
2125 dst->var = strdup_or_goto(src->var, out_err);
2126 dst->type = strdup_or_goto(src->type, out_err);
2129 ppfield = &(dst->field);
2131 *ppfield = zalloc(sizeof(*field));
2134 (*ppfield)->name = strdup_or_goto(field->name, out_err);
2135 (*ppfield)->index = field->index;
2136 (*ppfield)->ref = field->ref;
2137 field = field->next;
2138 ppfield = &((*ppfield)->next);
2145 int perf_probe_event__copy(struct perf_probe_event *dst,
2146 struct perf_probe_event *src)
2150 dst->event = strdup_or_goto(src->event, out_err);
2151 dst->group = strdup_or_goto(src->group, out_err);
2152 dst->target = strdup_or_goto(src->target, out_err);
2153 dst->uprobes = src->uprobes;
2155 if (perf_probe_point__copy(&dst->point, &src->point) < 0)
2158 dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs);
2161 dst->nargs = src->nargs;
2163 for (i = 0; i < src->nargs; i++)
2164 if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0)
2169 clear_perf_probe_event(dst);
2173 void clear_probe_trace_event(struct probe_trace_event *tev)
2175 struct probe_trace_arg_ref *ref, *next;
2180 free(tev->point.symbol);
2181 free(tev->point.realname);
2182 free(tev->point.module);
2183 for (i = 0; i < tev->nargs; i++) {
2184 free(tev->args[i].name);
2185 free(tev->args[i].value);
2186 free(tev->args[i].type);
2187 ref = tev->args[i].ref;
2195 memset(tev, 0, sizeof(*tev));
2198 struct kprobe_blacklist_node {
2199 struct list_head list;
2200 unsigned long start;
2205 static void kprobe_blacklist__delete(struct list_head *blacklist)
2207 struct kprobe_blacklist_node *node;
2209 while (!list_empty(blacklist)) {
2210 node = list_first_entry(blacklist,
2211 struct kprobe_blacklist_node, list);
2212 list_del(&node->list);
2218 static int kprobe_blacklist__load(struct list_head *blacklist)
2220 struct kprobe_blacklist_node *node;
2221 const char *__debugfs = debugfs__mountpoint();
2222 char buf[PATH_MAX], *p;
2226 if (__debugfs == NULL)
2229 ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs);
2233 fp = fopen(buf, "r");
2238 while (fgets(buf, PATH_MAX, fp)) {
2239 node = zalloc(sizeof(*node));
2244 INIT_LIST_HEAD(&node->list);
2245 list_add_tail(&node->list, blacklist);
2246 if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) {
2250 p = strchr(buf, '\t');
2253 if (p[strlen(p) - 1] == '\n')
2254 p[strlen(p) - 1] = '\0';
2256 p = (char *)"unknown";
2257 node->symbol = strdup(p);
2258 if (!node->symbol) {
2262 pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n",
2263 node->start, node->end, node->symbol);
2267 kprobe_blacklist__delete(blacklist);
2273 static struct kprobe_blacklist_node *
2274 kprobe_blacklist__find_by_address(struct list_head *blacklist,
2275 unsigned long address)
2277 struct kprobe_blacklist_node *node;
2279 list_for_each_entry(node, blacklist, list) {
2280 if (node->start <= address && address <= node->end)
2287 static LIST_HEAD(kprobe_blacklist);
2289 static void kprobe_blacklist__init(void)
2291 if (!list_empty(&kprobe_blacklist))
2294 if (kprobe_blacklist__load(&kprobe_blacklist) < 0)
2295 pr_debug("No kprobe blacklist support, ignored\n");
2298 static void kprobe_blacklist__release(void)
2300 kprobe_blacklist__delete(&kprobe_blacklist);
2303 static bool kprobe_blacklist__listed(unsigned long address)
2305 return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address);
2308 static int perf_probe_event__sprintf(const char *group, const char *event,
2309 struct perf_probe_event *pev,
2311 struct strbuf *result)
2316 if (asprintf(&buf, "%s:%s", group, event) < 0)
2318 ret = strbuf_addf(result, " %-20s (on ", buf);
2323 /* Synthesize only event probe point */
2324 buf = synthesize_perf_probe_point(&pev->point);
2327 ret = strbuf_addstr(result, buf);
2331 ret = strbuf_addf(result, " in %s", module);
2333 if (!ret && pev->nargs > 0) {
2334 ret = strbuf_add(result, " with", 5);
2335 for (i = 0; !ret && i < pev->nargs; i++) {
2336 buf = synthesize_perf_probe_arg(&pev->args[i]);
2339 ret = strbuf_addf(result, " %s", buf);
2344 ret = strbuf_addch(result, ')');
2350 int show_perf_probe_event(const char *group, const char *event,
2351 struct perf_probe_event *pev,
2352 const char *module, bool use_stdout)
2354 struct strbuf buf = STRBUF_INIT;
2357 ret = perf_probe_event__sprintf(group, event, pev, module, &buf);
2360 printf("%s\n", buf.buf);
2362 pr_info("%s\n", buf.buf);
2364 strbuf_release(&buf);
2369 static bool filter_probe_trace_event(struct probe_trace_event *tev,
2370 struct strfilter *filter)
2374 /* At first, check the event name itself */
2375 if (strfilter__compare(filter, tev->event))
2378 /* Next, check the combination of name and group */
2379 if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0)
2381 return strfilter__compare(filter, tmp);
2384 static int __show_perf_probe_events(int fd, bool is_kprobe,
2385 struct strfilter *filter)
2388 struct probe_trace_event tev;
2389 struct perf_probe_event pev;
2390 struct strlist *rawlist;
2391 struct str_node *ent;
2393 memset(&tev, 0, sizeof(tev));
2394 memset(&pev, 0, sizeof(pev));
2396 rawlist = probe_file__get_rawlist(fd);
2400 strlist__for_each_entry(ent, rawlist) {
2401 ret = parse_probe_trace_command(ent->s, &tev);
2403 if (!filter_probe_trace_event(&tev, filter))
2405 ret = convert_to_perf_probe_event(&tev, &pev,
2409 ret = show_perf_probe_event(pev.group, pev.event,
2410 &pev, tev.point.module,
2414 clear_perf_probe_event(&pev);
2415 clear_probe_trace_event(&tev);
2419 strlist__delete(rawlist);
2420 /* Cleanup cached debuginfo if needed */
2421 debuginfo_cache__exit();
2426 /* List up current perf-probe events */
2427 int show_perf_probe_events(struct strfilter *filter)
2429 int kp_fd, up_fd, ret;
2433 if (probe_conf.cache)
2434 return probe_cache__show_all_caches(filter);
2436 ret = init_probe_symbol_maps(false);
2440 ret = probe_file__open_both(&kp_fd, &up_fd, 0);
2445 ret = __show_perf_probe_events(kp_fd, true, filter);
2446 if (up_fd >= 0 && ret >= 0)
2447 ret = __show_perf_probe_events(up_fd, false, filter);
2452 exit_probe_symbol_maps();
2457 static int get_new_event_name(char *buf, size_t len, const char *base,
2458 struct strlist *namelist, bool allow_suffix)
2465 nbase = strdup(base);
2469 /* Cut off the dot suffixes (e.g. .const, .isra)*/
2470 p = strchr(nbase, '.');
2471 if (p && p != nbase)
2474 /* Try no suffix number */
2475 ret = e_snprintf(buf, len, "%s", nbase);
2477 pr_debug("snprintf() failed: %d\n", ret);
2480 if (!strlist__has_entry(namelist, buf))
2483 if (!allow_suffix) {
2484 pr_warning("Error: event \"%s\" already exists.\n"
2485 " Hint: Remove existing event by 'perf probe -d'\n"
2486 " or force duplicates by 'perf probe -f'\n"
2487 " or set 'force=yes' in BPF source.\n",
2493 /* Try to add suffix */
2494 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2495 ret = e_snprintf(buf, len, "%s_%d", nbase, i);
2497 pr_debug("snprintf() failed: %d\n", ret);
2500 if (!strlist__has_entry(namelist, buf))
2503 if (i == MAX_EVENT_INDEX) {
2504 pr_warning("Too many events are on the same function.\n");
2513 /* Warn if the current kernel's uprobe implementation is old */
2514 static void warn_uprobe_event_compat(struct probe_trace_event *tev)
2517 char *buf = synthesize_probe_trace_command(tev);
2519 /* Old uprobe event doesn't support memory dereference */
2520 if (!tev->uprobes || tev->nargs == 0 || !buf)
2523 for (i = 0; i < tev->nargs; i++)
2524 if (strglobmatch(tev->args[i].value, "[$@+-]*")) {
2525 pr_warning("Please upgrade your kernel to at least "
2526 "3.14 to have access to feature %s\n",
2527 tev->args[i].value);
2534 /* Set new name from original perf_probe_event and namelist */
2535 static int probe_trace_event__set_name(struct probe_trace_event *tev,
2536 struct perf_probe_event *pev,
2537 struct strlist *namelist,
2540 const char *event, *group;
2544 /* If probe_event or trace_event already have the name, reuse it */
2545 if (pev->event && !pev->sdt)
2547 else if (tev->event)
2550 /* Or generate new one from probe point */
2551 if (pev->point.function &&
2552 (strncmp(pev->point.function, "0x", 2) != 0) &&
2553 !strisglob(pev->point.function))
2554 event = pev->point.function;
2556 event = tev->point.realname;
2558 if (pev->group && !pev->sdt)
2560 else if (tev->group)
2563 group = PERFPROBE_GROUP;
2565 /* Get an unused new event name */
2566 ret = get_new_event_name(buf, 64, event,
2567 namelist, allow_suffix);
2573 tev->event = strdup(event);
2574 tev->group = strdup(group);
2575 if (tev->event == NULL || tev->group == NULL)
2578 /* Add added event name to namelist */
2579 strlist__add(namelist, event);
2583 static int __open_probe_file_and_namelist(bool uprobe,
2584 struct strlist **namelist)
2588 fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0));
2592 /* Get current event names */
2593 *namelist = probe_file__get_namelist(fd);
2595 pr_debug("Failed to get current event list.\n");
2602 static int __add_probe_trace_events(struct perf_probe_event *pev,
2603 struct probe_trace_event *tevs,
2604 int ntevs, bool allow_suffix)
2606 int i, fd[2] = {-1, -1}, up, ret;
2607 struct probe_trace_event *tev = NULL;
2608 struct probe_cache *cache = NULL;
2609 struct strlist *namelist[2] = {NULL, NULL};
2611 up = pev->uprobes ? 1 : 0;
2612 fd[up] = __open_probe_file_and_namelist(up, &namelist[up]);
2617 for (i = 0; i < ntevs; i++) {
2619 up = tev->uprobes ? 1 : 0;
2620 if (fd[up] == -1) { /* Open the kprobe/uprobe_events */
2621 fd[up] = __open_probe_file_and_namelist(up,
2626 /* Skip if the symbol is out of .text or blacklisted */
2627 if (!tev->point.symbol && !pev->uprobes)
2630 /* Set new name for tev (and update namelist) */
2631 ret = probe_trace_event__set_name(tev, pev, namelist[up],
2636 ret = probe_file__add_event(fd[up], tev);
2641 * Probes after the first probe which comes from same
2642 * user input are always allowed to add suffix, because
2643 * there might be several addresses corresponding to
2646 allow_suffix = true;
2648 if (ret == -EINVAL && pev->uprobes)
2649 warn_uprobe_event_compat(tev);
2650 if (ret == 0 && probe_conf.cache) {
2651 cache = probe_cache__new(pev->target);
2653 probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 ||
2654 probe_cache__commit(cache) < 0)
2655 pr_warning("Failed to add event to probe cache\n");
2656 probe_cache__delete(cache);
2660 for (up = 0; up < 2; up++) {
2661 strlist__delete(namelist[up]);
2668 static int find_probe_functions(struct map *map, char *name,
2669 struct symbol **syms)
2673 struct rb_node *tmp;
2675 if (map__load(map, NULL) < 0)
2678 map__for_each_symbol(map, sym, tmp) {
2679 if (strglobmatch(sym->name, name)) {
2681 if (syms && found < probe_conf.max_probes)
2682 syms[found - 1] = sym;
2689 void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused,
2690 struct probe_trace_event *tev __maybe_unused,
2691 struct map *map __maybe_unused,
2692 struct symbol *sym __maybe_unused) { }
2695 * Find probe function addresses from map.
2696 * Return an error or the number of found probe_trace_event
2698 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2699 struct probe_trace_event **tevs)
2701 struct map *map = NULL;
2702 struct ref_reloc_sym *reloc_sym = NULL;
2704 struct symbol **syms = NULL;
2705 struct probe_trace_event *tev;
2706 struct perf_probe_point *pp = &pev->point;
2707 struct probe_trace_point *tp;
2708 int num_matched_functions;
2709 int ret, i, j, skipped = 0;
2712 map = get_target_map(pev->target, pev->uprobes);
2718 syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes);
2725 * Load matched symbols: Since the different local symbols may have
2726 * same name but different addresses, this lists all the symbols.
2728 num_matched_functions = find_probe_functions(map, pp->function, syms);
2729 if (num_matched_functions == 0) {
2730 pr_err("Failed to find symbol %s in %s\n", pp->function,
2731 pev->target ? : "kernel");
2734 } else if (num_matched_functions > probe_conf.max_probes) {
2735 pr_err("Too many functions matched in %s\n",
2736 pev->target ? : "kernel");
2741 /* Note that the symbols in the kmodule are not relocated */
2742 if (!pev->uprobes && !pp->retprobe && !pev->target) {
2743 reloc_sym = kernel_get_ref_reloc_sym();
2745 pr_warning("Relocated base symbol is not found!\n");
2751 /* Setup result trace-probe-events */
2752 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2760 for (j = 0; j < num_matched_functions; j++) {
2763 tev = (*tevs) + ret;
2765 if (ret == num_matched_functions) {
2766 pr_warning("Too many symbols are listed. Skip it.\n");
2771 if (pp->offset > sym->end - sym->start) {
2772 pr_warning("Offset %ld is bigger than the size of %s\n",
2773 pp->offset, sym->name);
2777 /* Add one probe point */
2778 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2780 /* Check the kprobe (not in module) is within .text */
2781 if (!pev->uprobes && !pev->target &&
2782 kprobe_warn_out_range(sym->name, tp->address)) {
2783 tp->symbol = NULL; /* Skip it */
2785 } else if (reloc_sym) {
2786 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2787 tp->offset = tp->address - reloc_sym->addr;
2789 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2790 tp->offset = pp->offset;
2792 tp->realname = strdup_or_goto(sym->name, nomem_out);
2794 tp->retprobe = pp->retprobe;
2797 tev->point.module = strdup_or_goto(pev->target,
2800 mod_name = find_module_name(pev->target);
2802 strdup(mod_name ? mod_name : pev->target);
2804 if (!tev->point.module)
2808 tev->uprobes = pev->uprobes;
2809 tev->nargs = pev->nargs;
2811 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2813 if (tev->args == NULL)
2816 for (i = 0; i < tev->nargs; i++) {
2817 if (pev->args[i].name)
2819 strdup_or_goto(pev->args[i].name,
2822 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2824 if (pev->args[i].type)
2826 strdup_or_goto(pev->args[i].type,
2829 arch__fix_tev_from_maps(pev, tev, map, sym);
2831 if (ret == skipped) {
2837 put_target_map(map, pev->uprobes);
2844 clear_probe_trace_events(*tevs, num_matched_functions);
2849 static int try_to_find_absolute_address(struct perf_probe_event *pev,
2850 struct probe_trace_event **tevs)
2852 struct perf_probe_point *pp = &pev->point;
2853 struct probe_trace_event *tev;
2854 struct probe_trace_point *tp;
2857 if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2)))
2859 if (perf_probe_event_need_dwarf(pev))
2863 * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at
2866 * Only one tev can be generated by this.
2868 *tevs = zalloc(sizeof(*tev));
2876 * Don't use tp->offset, use address directly, because
2877 * in synthesize_probe_trace_command() address cannot be
2880 tp->address = pev->point.abs_address;
2881 tp->retprobe = pp->retprobe;
2882 tev->uprobes = pev->uprobes;
2886 * Give it a '0x' leading symbol name.
2887 * In __add_probe_trace_events, a NULL symbol is interpreted as
2890 if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0)
2893 /* For kprobe, check range */
2894 if ((!tev->uprobes) &&
2895 (kprobe_warn_out_range(tev->point.symbol,
2896 tev->point.address))) {
2901 if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0)
2905 tp->module = strdup(pev->target);
2911 tev->group = strdup(pev->group);
2917 tev->event = strdup(pev->event);
2922 tev->nargs = pev->nargs;
2923 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
2928 for (i = 0; i < tev->nargs; i++)
2929 copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]);
2935 clear_probe_trace_events(*tevs, 1);
2941 bool __weak arch__prefers_symtab(void) { return false; }
2943 /* Concatinate two arrays */
2944 static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b)
2948 ret = malloc(sz_a + sz_b);
2950 memcpy(ret, a, sz_a);
2951 memcpy(ret + sz_a, b, sz_b);
2957 concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs,
2958 struct probe_trace_event **tevs2, int ntevs2)
2960 struct probe_trace_event *new_tevs;
2970 if (*ntevs + ntevs2 > probe_conf.max_probes)
2973 /* Concatinate the array of probe_trace_event */
2974 new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs),
2975 *tevs2, ntevs2 * sizeof(**tevs2));
2985 clear_probe_trace_events(*tevs2, ntevs2);
2992 * Try to find probe_trace_event from given probe caches. Return the number
2993 * of cached events found, if an error occurs return the error.
2995 static int find_cached_events(struct perf_probe_event *pev,
2996 struct probe_trace_event **tevs,
2999 struct probe_cache *cache;
3000 struct probe_cache_entry *entry;
3001 struct probe_trace_event *tmp_tevs = NULL;
3005 cache = probe_cache__new(target);
3006 /* Return 0 ("not found") if the target has no probe cache. */
3010 for_each_probe_cache_entry(entry, cache) {
3011 /* Skip the cache entry which has no name */
3012 if (!entry->pev.event || !entry->pev.group)
3014 if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) &&
3015 strglobmatch(entry->pev.event, pev->event)) {
3016 ret = probe_cache_entry__get_event(entry, &tmp_tevs);
3018 ret = concat_probe_trace_events(tevs, &ntevs,
3024 probe_cache__delete(cache);
3026 clear_probe_trace_events(*tevs, ntevs);
3030 if (ntevs > 0 && target && target[0] == '/')
3031 pev->uprobes = true;
3037 /* Try to find probe_trace_event from all probe caches */
3038 static int find_cached_events_all(struct perf_probe_event *pev,
3039 struct probe_trace_event **tevs)
3041 struct probe_trace_event *tmp_tevs = NULL;
3042 struct strlist *bidlist;
3043 struct str_node *nd;
3048 /* Get the buildid list of all valid caches */
3049 bidlist = build_id_cache__list_all(true);
3052 pr_debug("Failed to get buildids: %d\n", ret);
3057 strlist__for_each_entry(nd, bidlist) {
3058 pathname = build_id_cache__origname(nd->s);
3059 ret = find_cached_events(pev, &tmp_tevs, pathname);
3060 /* In the case of cnt == 0, we just skip it */
3062 ret = concat_probe_trace_events(tevs, &ntevs,
3068 strlist__delete(bidlist);
3071 clear_probe_trace_events(*tevs, ntevs);
3079 static int find_probe_trace_events_from_cache(struct perf_probe_event *pev,
3080 struct probe_trace_event **tevs)
3082 struct probe_cache *cache;
3083 struct probe_cache_entry *entry;
3084 struct probe_trace_event *tev;
3085 struct str_node *node;
3089 /* For SDT/cached events, we use special search functions */
3091 return find_cached_events_all(pev, tevs);
3093 return find_cached_events(pev, tevs, pev->target);
3095 cache = probe_cache__new(pev->target);
3099 entry = probe_cache__find(cache, pev);
3101 /* SDT must be in the cache */
3102 ret = pev->sdt ? -ENOENT : 0;
3106 ret = strlist__nr_entries(entry->tevlist);
3107 if (ret > probe_conf.max_probes) {
3108 pr_debug("Too many entries matched in the cache of %s\n",
3109 pev->target ? : "kernel");
3114 *tevs = zalloc(ret * sizeof(*tev));
3121 strlist__for_each_entry(node, entry->tevlist) {
3122 tev = &(*tevs)[i++];
3123 ret = parse_probe_trace_command(node->s, tev);
3126 /* Set the uprobes attribute as same as original */
3127 tev->uprobes = pev->uprobes;
3132 probe_cache__delete(cache);
3136 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
3137 struct probe_trace_event **tevs)
3141 if (!pev->group && !pev->sdt) {
3142 /* Set group name if not given */
3143 if (!pev->uprobes) {
3144 pev->group = strdup(PERFPROBE_GROUP);
3145 ret = pev->group ? 0 : -ENOMEM;
3147 ret = convert_exec_to_group(pev->target, &pev->group);
3149 pr_warning("Failed to make a group name.\n");
3154 ret = try_to_find_absolute_address(pev, tevs);
3158 /* At first, we need to lookup cache entry */
3159 ret = find_probe_trace_events_from_cache(pev, tevs);
3160 if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */
3161 return ret == 0 ? -ENOENT : ret; /* Found in probe cache */
3163 if (arch__prefers_symtab() && !perf_probe_event_need_dwarf(pev)) {
3164 ret = find_probe_trace_events_from_map(pev, tevs);
3166 return ret; /* Found in symbol table */
3169 /* Convert perf_probe_event with debuginfo */
3170 ret = try_to_find_probe_trace_events(pev, tevs);
3172 return ret; /* Found in debuginfo or got an error */
3174 return find_probe_trace_events_from_map(pev, tevs);
3177 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3181 /* Loop 1: convert all events */
3182 for (i = 0; i < npevs; i++) {
3183 /* Init kprobe blacklist if needed */
3184 if (!pevs[i].uprobes)
3185 kprobe_blacklist__init();
3186 /* Convert with or without debuginfo */
3187 ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs);
3190 pevs[i].ntevs = ret;
3192 /* This just release blacklist only if allocated */
3193 kprobe_blacklist__release();
3198 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3202 /* Loop 2: add all events */
3203 for (i = 0; i < npevs; i++) {
3204 ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs,
3206 probe_conf.force_add);
3213 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3217 /* Loop 3: cleanup and free trace events */
3218 for (i = 0; i < npevs; i++) {
3219 for (j = 0; j < pevs[i].ntevs; j++)
3220 clear_probe_trace_event(&pevs[i].tevs[j]);
3221 zfree(&pevs[i].tevs);
3223 clear_perf_probe_event(&pevs[i]);
3227 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3231 ret = init_probe_symbol_maps(pevs->uprobes);
3235 ret = convert_perf_probe_events(pevs, npevs);
3237 ret = apply_perf_probe_events(pevs, npevs);
3239 cleanup_perf_probe_events(pevs, npevs);
3241 exit_probe_symbol_maps();
3245 int del_perf_probe_events(struct strfilter *filter)
3247 int ret, ret2, ufd = -1, kfd = -1;
3248 char *str = strfilter__string(filter);
3253 /* Get current event names */
3254 ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
3258 ret = probe_file__del_events(kfd, filter);
3259 if (ret < 0 && ret != -ENOENT)
3262 ret2 = probe_file__del_events(ufd, filter);
3263 if (ret2 < 0 && ret2 != -ENOENT) {
3280 /* TODO: don't use a global variable for filter ... */
3281 static struct strfilter *available_func_filter;
3284 * If a symbol corresponds to a function with global binding and
3285 * matches filter return 0. For all others return 1.
3287 static int filter_available_functions(struct map *map __maybe_unused,
3290 if (strfilter__compare(available_func_filter, sym->name))
3295 int show_available_funcs(const char *target, struct strfilter *_filter,
3301 ret = init_probe_symbol_maps(user);
3305 /* Get a symbol map */
3307 map = dso__new_map(target);
3309 map = kernel_get_module_map(target);
3311 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
3315 /* Load symbols with given filter */
3316 available_func_filter = _filter;
3317 ret = map__load(map, filter_available_functions);
3320 char *str = strfilter__string(_filter);
3321 pr_err("Failed to find symbols matched to \"%s\"\n",
3325 pr_err("Failed to load symbols in %s\n",
3326 (target) ? : "kernel");
3329 if (!dso__sorted_by_name(map->dso, map->type))
3330 dso__sort_by_name(map->dso, map->type);
3332 /* Show all (filtered) symbols */
3334 dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
3339 exit_probe_symbol_maps();
3344 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
3345 struct perf_probe_arg *pvar)
3347 tvar->value = strdup(pvar->var);
3348 if (tvar->value == NULL)
3351 tvar->type = strdup(pvar->type);
3352 if (tvar->type == NULL)
3356 tvar->name = strdup(pvar->name);
3357 if (tvar->name == NULL)