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 if (strncmp(pos->dso->short_name + 1, module,
174 pos->dso->short_name_len - 2) == 0) {
181 static struct map *get_target_map(const char *target, bool user)
183 /* Init maps of given executable or kernel */
185 return dso__new_map(target);
187 return kernel_get_module_map(target);
190 static void put_target_map(struct map *map, bool user)
193 /* Only the user map needs to be released */
199 static int convert_exec_to_group(const char *exec, char **result)
201 char *ptr1, *ptr2, *exec_copy;
205 exec_copy = strdup(exec);
209 ptr1 = basename(exec_copy);
215 ptr2 = strpbrk(ptr1, "-._");
218 ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1);
222 *result = strdup(buf);
223 ret = *result ? 0 : -ENOMEM;
230 static void clear_perf_probe_point(struct perf_probe_point *pp)
237 static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs)
241 for (i = 0; i < ntevs; i++)
242 clear_probe_trace_event(tevs + i);
245 static bool kprobe_blacklist__listed(unsigned long address);
246 static bool kprobe_warn_out_range(const char *symbol, unsigned long address)
251 /* Get the address of _etext for checking non-probable text symbol */
252 ret = kernel_get_symbol_address_by_name("_etext", &etext_addr,
255 if (ret == 0 && etext_addr < address)
256 pr_warning("%s is out of .text, skip it.\n", symbol);
257 else if (kprobe_blacklist__listed(address))
258 pr_warning("%s is blacklisted function, skip it.\n", symbol);
267 * '.gnu.linkonce.this_module' section of kernel module elf directly
268 * maps to 'struct module' from linux/module.h. This section contains
269 * actual module name which will be used by kernel after loading it.
270 * But, we cannot use 'struct module' here since linux/module.h is not
271 * exposed to user-space. Offset of 'name' has remained same from long
272 * time, so hardcoding it here.
275 #define MOD_NAME_OFFSET 24
277 #define MOD_NAME_OFFSET 12
281 * @module can be module name of module file path. In case of path,
282 * inspect elf and find out what is actual module name.
283 * Caller has to free mod_name after using it.
285 static char *find_module_name(const char *module)
293 char *mod_name = NULL;
295 fd = open(module, O_RDONLY);
299 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
303 if (gelf_getehdr(elf, &ehdr) == NULL)
306 sec = elf_section_by_name(elf, &ehdr, &shdr,
307 ".gnu.linkonce.this_module", NULL);
311 data = elf_getdata(sec, NULL);
312 if (!data || !data->d_buf)
315 mod_name = strdup((char *)data->d_buf + MOD_NAME_OFFSET);
324 #ifdef HAVE_DWARF_SUPPORT
326 static int kernel_get_module_dso(const char *module, struct dso **pdso)
330 const char *vmlinux_name;
334 char module_name[128];
336 snprintf(module_name, sizeof(module_name), "[%s]", module);
337 map = map_groups__find_by_name(&host_machine->kmaps, MAP__FUNCTION, module_name);
342 pr_debug("Failed to find module %s.\n", module);
346 map = machine__kernel_map(host_machine);
349 vmlinux_name = symbol_conf.vmlinux_name;
352 ret = dso__load_vmlinux(dso, map, vmlinux_name, false, NULL);
354 ret = dso__load_vmlinux_path(dso, map, NULL);
361 * Some binaries like glibc have special symbols which are on the symbol
362 * table, but not in the debuginfo. If we can find the address of the
363 * symbol from map, we can translate the address back to the probe point.
365 static int find_alternative_probe_point(struct debuginfo *dinfo,
366 struct perf_probe_point *pp,
367 struct perf_probe_point *result,
368 const char *target, bool uprobes)
370 struct map *map = NULL;
375 /* This can work only for function-name based one */
376 if (!pp->function || pp->file)
379 map = get_target_map(target, uprobes);
383 /* Find the address of given function */
384 map__for_each_symbol_by_name(map, pp->function, sym) {
386 address = sym->start;
388 address = map->unmap_ip(map, sym->start);
395 pr_debug("Symbol %s address found : %" PRIx64 "\n",
396 pp->function, address);
398 ret = debuginfo__find_probe_point(dinfo, (unsigned long)address,
401 ret = (!ret) ? -ENOENT : ret;
403 result->offset += pp->offset;
404 result->line += pp->line;
405 result->retprobe = pp->retprobe;
410 put_target_map(map, uprobes);
415 static int get_alternative_probe_event(struct debuginfo *dinfo,
416 struct perf_probe_event *pev,
417 struct perf_probe_point *tmp)
421 memcpy(tmp, &pev->point, sizeof(*tmp));
422 memset(&pev->point, 0, sizeof(pev->point));
423 ret = find_alternative_probe_point(dinfo, tmp, &pev->point,
424 pev->target, pev->uprobes);
426 memcpy(&pev->point, tmp, sizeof(*tmp));
431 static int get_alternative_line_range(struct debuginfo *dinfo,
432 struct line_range *lr,
433 const char *target, bool user)
435 struct perf_probe_point pp = { .function = lr->function,
438 struct perf_probe_point result;
441 memset(&result, 0, sizeof(result));
443 if (lr->end != INT_MAX)
444 len = lr->end - lr->start;
445 ret = find_alternative_probe_point(dinfo, &pp, &result,
448 lr->function = result.function;
449 lr->file = result.file;
450 lr->start = result.line;
451 if (lr->end != INT_MAX)
452 lr->end = lr->start + len;
453 clear_perf_probe_point(&pp);
458 /* Open new debuginfo of given module */
459 static struct debuginfo *open_debuginfo(const char *module, bool silent)
461 const char *path = module;
462 char reason[STRERR_BUFSIZE];
463 struct debuginfo *ret = NULL;
464 struct dso *dso = NULL;
467 if (!module || !strchr(module, '/')) {
468 err = kernel_get_module_dso(module, &dso);
470 if (!dso || dso->load_errno == 0) {
471 if (!str_error_r(-err, reason, STRERR_BUFSIZE))
472 strcpy(reason, "(unknown)");
474 dso__strerror_load(dso, reason, STRERR_BUFSIZE);
476 pr_err("Failed to find the path for %s: %s\n",
477 module ?: "kernel", reason);
480 path = dso->long_name;
482 ret = debuginfo__new(path);
483 if (!ret && !silent) {
484 pr_warning("The %s file has no debug information.\n", path);
485 if (!module || !strtailcmp(path, ".ko"))
486 pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, ");
488 pr_warning("Rebuild with -g, ");
489 pr_warning("or install an appropriate debuginfo package.\n");
494 /* For caching the last debuginfo */
495 static struct debuginfo *debuginfo_cache;
496 static char *debuginfo_cache_path;
498 static struct debuginfo *debuginfo_cache__open(const char *module, bool silent)
500 const char *path = module;
502 /* If the module is NULL, it should be the kernel. */
506 if (debuginfo_cache_path && !strcmp(debuginfo_cache_path, path))
509 /* Copy module path */
510 free(debuginfo_cache_path);
511 debuginfo_cache_path = strdup(path);
512 if (!debuginfo_cache_path) {
513 debuginfo__delete(debuginfo_cache);
514 debuginfo_cache = NULL;
518 debuginfo_cache = open_debuginfo(module, silent);
519 if (!debuginfo_cache)
520 zfree(&debuginfo_cache_path);
522 return debuginfo_cache;
525 static void debuginfo_cache__exit(void)
527 debuginfo__delete(debuginfo_cache);
528 debuginfo_cache = NULL;
529 zfree(&debuginfo_cache_path);
533 static int get_text_start_address(const char *exec, unsigned long *address)
538 int fd, ret = -ENOENT;
540 fd = open(exec, O_RDONLY);
544 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
550 if (gelf_getehdr(elf, &ehdr) == NULL)
553 if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL))
556 *address = shdr.sh_addr - shdr.sh_offset;
567 * Convert trace point to probe point with debuginfo
569 static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
570 struct perf_probe_point *pp,
573 struct debuginfo *dinfo = NULL;
574 unsigned long stext = 0;
575 u64 addr = tp->address;
578 /* convert the address to dwarf address */
584 ret = get_text_start_address(tp->module, &stext);
588 } else if (tp->symbol) {
589 /* If the module is given, this returns relative address */
590 ret = kernel_get_symbol_address_by_name(tp->symbol, &addr,
591 false, !!tp->module);
597 pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
598 tp->module ? : "kernel");
600 dinfo = debuginfo_cache__open(tp->module, verbose == 0);
602 ret = debuginfo__find_probe_point(dinfo,
603 (unsigned long)addr, pp);
608 pp->retprobe = tp->retprobe;
612 pr_debug("Failed to find corresponding probes from debuginfo.\n");
613 return ret ? : -ENOENT;
616 static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
617 int ntevs, const char *exec)
620 unsigned long stext = 0;
625 ret = get_text_start_address(exec, &stext);
629 for (i = 0; i < ntevs && ret >= 0; i++) {
630 /* point.address is the addres of point.symbol + point.offset */
631 tevs[i].point.address -= stext;
632 tevs[i].point.module = strdup(exec);
633 if (!tevs[i].point.module) {
637 tevs[i].uprobes = true;
643 static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
644 int ntevs, const char *module)
647 char *mod_name = NULL;
652 mod_name = find_module_name(module);
654 for (i = 0; i < ntevs; i++) {
655 tevs[i].point.module =
656 strdup(mod_name ? mod_name : module);
657 if (!tevs[i].point.module) {
667 /* Post processing the probe events */
668 static int post_process_probe_trace_events(struct probe_trace_event *tevs,
669 int ntevs, const char *module,
672 struct ref_reloc_sym *reloc_sym;
677 return add_exec_to_probe_trace_events(tevs, ntevs, module);
679 /* Note that currently ref_reloc_sym based probe is not for drivers */
681 return add_module_to_probe_trace_events(tevs, ntevs, module);
683 reloc_sym = kernel_get_ref_reloc_sym();
685 pr_warning("Relocated base symbol is not found!\n");
689 for (i = 0; i < ntevs; i++) {
690 if (!tevs[i].point.address || tevs[i].point.retprobe)
692 /* If we found a wrong one, mark it by NULL symbol */
693 if (kprobe_warn_out_range(tevs[i].point.symbol,
694 tevs[i].point.address)) {
698 tmp = strdup(reloc_sym->name);
702 /* If we have no realname, use symbol for it */
703 if (!tevs[i].point.realname)
704 tevs[i].point.realname = tevs[i].point.symbol;
706 free(tevs[i].point.symbol);
707 tevs[i].point.symbol = tmp;
708 tevs[i].point.offset = tevs[i].point.address -
709 reloc_sym->unrelocated_addr;
714 /* Try to find perf_probe_event with debuginfo */
715 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
716 struct probe_trace_event **tevs)
718 bool need_dwarf = perf_probe_event_need_dwarf(pev);
719 struct perf_probe_point tmp;
720 struct debuginfo *dinfo;
723 dinfo = open_debuginfo(pev->target, !need_dwarf);
727 pr_debug("Could not open debuginfo. Try to use symbols.\n");
731 pr_debug("Try to find probe point from debuginfo.\n");
732 /* Searching trace events corresponding to a probe event */
733 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
735 if (ntevs == 0) { /* Not found, retry with an alternative */
736 ret = get_alternative_probe_event(dinfo, pev, &tmp);
738 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
740 * Write back to the original probe_event for
741 * setting appropriate (user given) event name
743 clear_perf_probe_point(&pev->point);
744 memcpy(&pev->point, &tmp, sizeof(tmp));
748 debuginfo__delete(dinfo);
750 if (ntevs > 0) { /* Succeeded to find trace events */
751 pr_debug("Found %d probe_trace_events.\n", ntevs);
752 ret = post_process_probe_trace_events(*tevs, ntevs,
753 pev->target, pev->uprobes);
754 if (ret < 0 || ret == ntevs) {
755 clear_probe_trace_events(*tevs, ntevs);
759 return ret < 0 ? ret : ntevs;
764 if (ntevs == 0) { /* No error but failed to find probe point. */
765 pr_warning("Probe point '%s' not found.\n",
766 synthesize_perf_probe_point(&pev->point));
769 /* Error path : ntevs < 0 */
770 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
773 pr_warning("Warning: No dwarf info found in the vmlinux - "
774 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
776 pr_debug("Trying to use symbols.\n");
783 #define LINEBUF_SIZE 256
784 #define NR_ADDITIONAL_LINES 2
786 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
788 char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE];
789 const char *color = show_num ? "" : PERF_COLOR_BLUE;
790 const char *prefix = NULL;
793 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
798 prefix = show_num ? "%7d " : " ";
799 color_fprintf(stdout, color, prefix, l);
801 color_fprintf(stdout, color, "%s", buf);
803 } while (strchr(buf, '\n') == NULL);
808 pr_warning("File read error: %s\n",
809 str_error_r(errno, sbuf, sizeof(sbuf)));
815 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
817 int rv = __show_one_line(fp, l, skip, show_num);
819 pr_warning("Source file is shorter than expected.\n");
825 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
826 #define show_one_line(f,l) _show_one_line(f,l,false,false)
827 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
828 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
831 * Show line-range always requires debuginfo to find source file and
834 static int __show_line_range(struct line_range *lr, const char *module,
839 struct debuginfo *dinfo;
843 char sbuf[STRERR_BUFSIZE];
845 /* Search a line range */
846 dinfo = open_debuginfo(module, false);
850 ret = debuginfo__find_line_range(dinfo, lr);
851 if (!ret) { /* Not found, retry with an alternative */
852 ret = get_alternative_line_range(dinfo, lr, module, user);
854 ret = debuginfo__find_line_range(dinfo, lr);
856 debuginfo__delete(dinfo);
857 if (ret == 0 || ret == -ENOENT) {
858 pr_warning("Specified source line is not found.\n");
860 } else if (ret < 0) {
861 pr_warning("Debuginfo analysis failed.\n");
865 /* Convert source file path */
867 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
869 /* Free old path when new path is assigned */
874 pr_warning("Failed to find source file path.\n");
881 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
882 lr->start - lr->offset);
884 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
886 fp = fopen(lr->path, "r");
888 pr_warning("Failed to open %s: %s\n", lr->path,
889 str_error_r(errno, sbuf, sizeof(sbuf)));
892 /* Skip to starting line number */
893 while (l < lr->start) {
894 ret = skip_one_line(fp, l++);
899 intlist__for_each_entry(ln, lr->line_list) {
900 for (; ln->i > l; l++) {
901 ret = show_one_line(fp, l - lr->offset);
905 ret = show_one_line_with_num(fp, l++ - lr->offset);
910 if (lr->end == INT_MAX)
911 lr->end = l + NR_ADDITIONAL_LINES;
912 while (l <= lr->end) {
913 ret = show_one_line_or_eof(fp, l++ - lr->offset);
922 int show_line_range(struct line_range *lr, const char *module, bool user)
926 ret = init_probe_symbol_maps(user);
929 ret = __show_line_range(lr, module, user);
930 exit_probe_symbol_maps();
935 static int show_available_vars_at(struct debuginfo *dinfo,
936 struct perf_probe_event *pev,
937 struct strfilter *_filter)
941 struct str_node *node;
942 struct variable_list *vls = NULL, *vl;
943 struct perf_probe_point tmp;
946 buf = synthesize_perf_probe_point(&pev->point);
949 pr_debug("Searching variables at %s\n", buf);
951 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls);
952 if (!ret) { /* Not found, retry with an alternative */
953 ret = get_alternative_probe_event(dinfo, pev, &tmp);
955 ret = debuginfo__find_available_vars_at(dinfo, pev,
957 /* Release the old probe_point */
958 clear_perf_probe_point(&tmp);
962 if (ret == 0 || ret == -ENOENT) {
963 pr_err("Failed to find the address of %s\n", buf);
966 pr_warning("Debuginfo analysis failed.\n");
970 /* Some variables are found */
971 fprintf(stdout, "Available variables at %s\n", buf);
972 for (i = 0; i < ret; i++) {
975 * A probe point might be converted to
976 * several trace points.
978 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
980 zfree(&vl->point.symbol);
983 strlist__for_each_entry(node, vl->vars) {
984 var = strchr(node->s, '\t') + 1;
985 if (strfilter__compare(_filter, var)) {
986 fprintf(stdout, "\t\t%s\n", node->s);
990 strlist__delete(vl->vars);
993 fprintf(stdout, "\t\t(No matched variables)\n");
1001 /* Show available variables on given probe point */
1002 int show_available_vars(struct perf_probe_event *pevs, int npevs,
1003 struct strfilter *_filter)
1006 struct debuginfo *dinfo;
1008 ret = init_probe_symbol_maps(pevs->uprobes);
1012 dinfo = open_debuginfo(pevs->target, false);
1020 for (i = 0; i < npevs && ret >= 0; i++)
1021 ret = show_available_vars_at(dinfo, &pevs[i], _filter);
1023 debuginfo__delete(dinfo);
1025 exit_probe_symbol_maps();
1029 #else /* !HAVE_DWARF_SUPPORT */
1031 static void debuginfo_cache__exit(void)
1036 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
1037 struct perf_probe_point *pp __maybe_unused,
1038 bool is_kprobe __maybe_unused)
1043 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
1044 struct probe_trace_event **tevs __maybe_unused)
1046 if (perf_probe_event_need_dwarf(pev)) {
1047 pr_warning("Debuginfo-analysis is not supported.\n");
1054 int show_line_range(struct line_range *lr __maybe_unused,
1055 const char *module __maybe_unused,
1056 bool user __maybe_unused)
1058 pr_warning("Debuginfo-analysis is not supported.\n");
1062 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
1063 int npevs __maybe_unused,
1064 struct strfilter *filter __maybe_unused)
1066 pr_warning("Debuginfo-analysis is not supported.\n");
1071 void line_range__clear(struct line_range *lr)
1077 intlist__delete(lr->line_list);
1078 memset(lr, 0, sizeof(*lr));
1081 int line_range__init(struct line_range *lr)
1083 memset(lr, 0, sizeof(*lr));
1084 lr->line_list = intlist__new(NULL);
1091 static int parse_line_num(char **ptr, int *val, const char *what)
1093 const char *start = *ptr;
1096 *val = strtol(*ptr, ptr, 0);
1097 if (errno || *ptr == start) {
1098 semantic_error("'%s' is not a valid number.\n", what);
1104 /* Check the name is good for event, group or function */
1105 static bool is_c_func_name(const char *name)
1107 if (!isalpha(*name) && *name != '_')
1109 while (*++name != '\0') {
1110 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
1117 * Stuff 'lr' according to the line range described by 'arg'.
1118 * The line range syntax is described by:
1120 * SRC[:SLN[+NUM|-ELN]]
1121 * FNC[@SRC][:SLN[+NUM|-ELN]]
1123 int parse_line_range_desc(const char *arg, struct line_range *lr)
1125 char *range, *file, *name = strdup(arg);
1134 range = strchr(name, ':');
1138 err = parse_line_num(&range, &lr->start, "start line");
1142 if (*range == '+' || *range == '-') {
1143 const char c = *range++;
1145 err = parse_line_num(&range, &lr->end, "end line");
1150 lr->end += lr->start;
1152 * Adjust the number of lines here.
1153 * If the number of lines == 1, the
1154 * the end of line should be equal to
1155 * the start of line.
1161 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
1164 if (lr->start > lr->end) {
1165 semantic_error("Start line must be smaller"
1166 " than end line.\n");
1169 if (*range != '\0') {
1170 semantic_error("Tailing with invalid str '%s'.\n", range);
1175 file = strchr(name, '@');
1178 lr->file = strdup(++file);
1179 if (lr->file == NULL) {
1183 lr->function = name;
1184 } else if (strchr(name, '/') || strchr(name, '.'))
1186 else if (is_c_func_name(name))/* We reuse it for checking funcname */
1187 lr->function = name;
1188 else { /* Invalid name */
1189 semantic_error("'%s' is not a valid function name.\n", name);
1200 static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev)
1204 ptr = strchr(*arg, ':');
1207 if (!pev->sdt && !is_c_func_name(*arg))
1209 pev->group = strdup(*arg);
1215 if (!pev->sdt && !is_c_func_name(*arg)) {
1217 semantic_error("%s is bad for event name -it must "
1218 "follow C symbol-naming rule.\n", *arg);
1221 pev->event = strdup(*arg);
1222 if (pev->event == NULL)
1228 /* Parse probepoint definition. */
1229 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
1231 struct perf_probe_point *pp = &pev->point;
1234 bool file_spec = false;
1239 * perf probe [GRP:][EVENT=]SRC[:LN|;PTN]
1240 * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
1241 * perf probe %[GRP:]SDT_EVENT
1247 * If the probe point starts with '%',
1248 * or starts with "sdt_" and has a ':' but no '=',
1249 * then it should be a SDT/cached probe point.
1251 if (arg[0] == '%' ||
1252 (!strncmp(arg, "sdt_", 4) &&
1253 !!strchr(arg, ':') && !strchr(arg, '='))) {
1259 ptr = strpbrk(arg, ";=@+%");
1263 semantic_error("%s must be an SDT name.\n",
1267 /* This must be a target file name or build id */
1268 tmp = build_id_cache__complement(ptr + 1);
1270 pev->target = build_id_cache__origname(tmp);
1273 pev->target = strdup(ptr + 1);
1278 ret = parse_perf_probe_event_name(&arg, pev);
1280 if (asprintf(&pev->point.function, "%%%s", pev->event) < 0)
1286 if (ptr && *ptr == '=') { /* Event name */
1289 ret = parse_perf_probe_event_name(&arg, pev);
1297 * Check arg is function or file name and copy it.
1299 * We consider arg to be a file spec if and only if it satisfies
1300 * all of the below criteria::
1301 * - it does not include any of "+@%",
1302 * - it includes one of ":;", and
1303 * - it has a period '.' in the name.
1305 * Otherwise, we consider arg to be a function specification.
1307 if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) {
1308 /* This is a file spec if it includes a '.' before ; or : */
1309 if (memchr(arg, '.', ptr - arg))
1313 ptr = strpbrk(arg, ";:+@%");
1333 * Keep pp->function even if this is absolute address,
1334 * so it can mark whether abs_address is valid.
1335 * Which make 'perf probe lib.bin 0x0' possible.
1337 * Note that checking length of tmp is not needed
1338 * because when we access tmp[1] we know tmp[0] is '0',
1339 * so tmp[1] should always valid (but could be '\0').
1341 if (tmp && !strncmp(tmp, "0x", 2)) {
1342 pp->abs_address = strtoul(pp->function, &tmp, 0);
1344 semantic_error("Invalid absolute address.\n");
1350 /* Parse other options */
1354 if (c == ';') { /* Lazy pattern must be the last part */
1355 pp->lazy_line = strdup(arg);
1356 if (pp->lazy_line == NULL)
1360 ptr = strpbrk(arg, ";:+@%");
1366 case ':': /* Line number */
1367 pp->line = strtoul(arg, &tmp, 0);
1369 semantic_error("There is non-digit char"
1370 " in line number.\n");
1374 case '+': /* Byte offset from a symbol */
1375 pp->offset = strtoul(arg, &tmp, 0);
1377 semantic_error("There is non-digit character"
1382 case '@': /* File name */
1384 semantic_error("SRC@SRC is not allowed.\n");
1387 pp->file = strdup(arg);
1388 if (pp->file == NULL)
1391 case '%': /* Probe places */
1392 if (strcmp(arg, "return") == 0) {
1394 } else { /* Others not supported yet */
1395 semantic_error("%%%s is not supported.\n", arg);
1399 default: /* Buggy case */
1400 pr_err("This program has a bug at %s:%d.\n",
1401 __FILE__, __LINE__);
1407 /* Exclusion check */
1408 if (pp->lazy_line && pp->line) {
1409 semantic_error("Lazy pattern can't be used with"
1414 if (pp->lazy_line && pp->offset) {
1415 semantic_error("Lazy pattern can't be used with offset.\n");
1419 if (pp->line && pp->offset) {
1420 semantic_error("Offset can't be used with line number.\n");
1424 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1425 semantic_error("File always requires line number or "
1430 if (pp->offset && !pp->function) {
1431 semantic_error("Offset requires an entry function.\n");
1435 if (pp->retprobe && !pp->function) {
1436 semantic_error("Return probe requires an entry function.\n");
1440 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1441 semantic_error("Offset/Line/Lazy pattern can't be used with "
1446 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1447 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1452 /* Parse perf-probe event argument */
1453 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1455 char *tmp, *goodname;
1456 struct perf_probe_arg_field **fieldp;
1458 pr_debug("parsing arg: %s into ", str);
1460 tmp = strchr(str, '=');
1462 arg->name = strndup(str, tmp - str);
1463 if (arg->name == NULL)
1465 pr_debug("name:%s ", arg->name);
1469 tmp = strchr(str, ':');
1470 if (tmp) { /* Type setting */
1472 arg->type = strdup(tmp + 1);
1473 if (arg->type == NULL)
1475 pr_debug("type:%s ", arg->type);
1478 tmp = strpbrk(str, "-.[");
1479 if (!is_c_varname(str) || !tmp) {
1480 /* A variable, register, symbol or special value */
1481 arg->var = strdup(str);
1482 if (arg->var == NULL)
1484 pr_debug("%s\n", arg->var);
1488 /* Structure fields or array element */
1489 arg->var = strndup(str, tmp - str);
1490 if (arg->var == NULL)
1492 goodname = arg->var;
1493 pr_debug("%s, ", arg->var);
1494 fieldp = &arg->field;
1497 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1498 if (*fieldp == NULL)
1500 if (*tmp == '[') { /* Array */
1502 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1503 (*fieldp)->ref = true;
1504 if (*tmp != ']' || tmp == str + 1) {
1505 semantic_error("Array index must be a"
1512 } else { /* Structure */
1515 (*fieldp)->ref = false;
1516 } else if (tmp[1] == '>') {
1518 (*fieldp)->ref = true;
1520 semantic_error("Argument parse error: %s\n",
1524 tmp = strpbrk(str, "-.[");
1527 (*fieldp)->name = strndup(str, tmp - str);
1528 if ((*fieldp)->name == NULL)
1531 goodname = (*fieldp)->name;
1532 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1533 fieldp = &(*fieldp)->next;
1536 (*fieldp)->name = strdup(str);
1537 if ((*fieldp)->name == NULL)
1540 goodname = (*fieldp)->name;
1541 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1543 /* If no name is specified, set the last field name (not array index)*/
1545 arg->name = strdup(goodname);
1546 if (arg->name == NULL)
1552 /* Parse perf-probe event command */
1553 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1556 int argc, i, ret = 0;
1558 argv = argv_split(cmd, &argc);
1560 pr_debug("Failed to split arguments.\n");
1563 if (argc - 1 > MAX_PROBE_ARGS) {
1564 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1568 /* Parse probe point */
1569 ret = parse_perf_probe_point(argv[0], pev);
1573 /* Copy arguments and ensure return probe has no C argument */
1574 pev->nargs = argc - 1;
1575 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1576 if (pev->args == NULL) {
1580 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1581 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1583 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1584 semantic_error("You can't specify local variable for"
1595 /* Return true if this perf_probe_event requires debuginfo */
1596 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1600 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1603 for (i = 0; i < pev->nargs; i++)
1604 if (is_c_varname(pev->args[i].var) ||
1605 !strcmp(pev->args[i].var, "$params") ||
1606 !strcmp(pev->args[i].var, "$vars"))
1612 /* Parse probe_events event into struct probe_point */
1613 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev)
1615 struct probe_trace_point *tp = &tev->point;
1618 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1622 pr_debug("Parsing probe_events: %s\n", cmd);
1623 argv = argv_split(cmd, &argc);
1625 pr_debug("Failed to split arguments.\n");
1629 semantic_error("Too few probe arguments.\n");
1634 /* Scan event and group name. */
1635 argv0_str = strdup(argv[0]);
1636 if (argv0_str == NULL) {
1640 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1641 fmt2_str = strtok_r(NULL, "/", &fmt);
1642 fmt3_str = strtok_r(NULL, " \t", &fmt);
1643 if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
1644 || fmt3_str == NULL) {
1645 semantic_error("Failed to parse event name: %s\n", argv[0]);
1650 tev->group = strdup(fmt2_str);
1651 tev->event = strdup(fmt3_str);
1652 if (tev->group == NULL || tev->event == NULL) {
1656 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1658 tp->retprobe = (pr == 'r');
1660 /* Scan module name(if there), function name and offset */
1661 p = strchr(argv[1], ':');
1663 tp->module = strndup(argv[1], p - argv[1]);
1668 tev->uprobes = (tp->module[0] == '/');
1672 fmt1_str = strtok_r(p, "+", &fmt);
1673 /* only the address started with 0x */
1674 if (fmt1_str[0] == '0') {
1676 * Fix a special case:
1677 * if address == 0, kernel reports something like:
1678 * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax
1679 * Newer kernel may fix that, but we want to
1680 * support old kernel also.
1682 if (strcmp(fmt1_str, "0x") == 0) {
1683 if (!argv[2] || strcmp(argv[2], "(null)")) {
1690 for (i = 2; argv[i + 1] != NULL; i++)
1691 argv[i] = argv[i + 1];
1696 tp->address = strtoul(fmt1_str, NULL, 0);
1698 /* Only the symbol-based probe has offset */
1699 tp->symbol = strdup(fmt1_str);
1700 if (tp->symbol == NULL) {
1704 fmt2_str = strtok_r(NULL, "", &fmt);
1705 if (fmt2_str == NULL)
1708 tp->offset = strtoul(fmt2_str, NULL, 10);
1711 tev->nargs = argc - 2;
1712 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1713 if (tev->args == NULL) {
1717 for (i = 0; i < tev->nargs; i++) {
1718 p = strchr(argv[i + 2], '=');
1719 if (p) /* We don't need which register is assigned. */
1723 tev->args[i].name = strdup(argv[i + 2]);
1724 /* TODO: parse regs and offset */
1725 tev->args[i].value = strdup(p);
1726 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1738 /* Compose only probe arg */
1739 char *synthesize_perf_probe_arg(struct perf_probe_arg *pa)
1741 struct perf_probe_arg_field *field = pa->field;
1746 if (strbuf_init(&buf, 64) < 0)
1749 if (pa->name && pa->var)
1750 err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var);
1752 err = strbuf_addstr(&buf, pa->name ?: pa->var);
1757 if (field->name[0] == '[')
1758 err = strbuf_addstr(&buf, field->name);
1760 err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".",
1762 field = field->next;
1768 if (strbuf_addf(&buf, ":%s", pa->type) < 0)
1771 ret = strbuf_detach(&buf, NULL);
1773 strbuf_release(&buf);
1777 /* Compose only probe point (not argument) */
1778 char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1781 char *tmp, *ret = NULL;
1784 if (strbuf_init(&buf, 64) < 0)
1788 if (strbuf_addstr(&buf, pp->function) < 0)
1791 err = strbuf_addf(&buf, "+%lu", pp->offset);
1793 err = strbuf_addf(&buf, ":%d", pp->line);
1794 else if (pp->retprobe)
1795 err = strbuf_addstr(&buf, "%return");
1803 tmp = strchr(pp->file + len - 30, '/');
1804 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1806 err = strbuf_addf(&buf, "@%s", tmp);
1807 if (!err && !pp->function && pp->line)
1808 err = strbuf_addf(&buf, ":%d", pp->line);
1811 ret = strbuf_detach(&buf, NULL);
1813 strbuf_release(&buf);
1817 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1820 char *tmp, *ret = NULL;
1823 if (strbuf_init(&buf, 64))
1826 if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP,
1830 tmp = synthesize_perf_probe_point(&pev->point);
1831 if (!tmp || strbuf_addstr(&buf, tmp) < 0)
1835 for (i = 0; i < pev->nargs; i++) {
1836 tmp = synthesize_perf_probe_arg(pev->args + i);
1837 if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0)
1842 ret = strbuf_detach(&buf, NULL);
1844 strbuf_release(&buf);
1848 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1849 struct strbuf *buf, int depth)
1853 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1858 err = strbuf_addf(buf, "%+ld(", ref->offset);
1859 return (err < 0) ? err : depth;
1862 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1865 struct probe_trace_arg_ref *ref = arg->ref;
1868 /* Argument name or separator */
1870 err = strbuf_addf(buf, " %s=", arg->name);
1872 err = strbuf_addch(buf, ' ');
1876 /* Special case: @XXX */
1877 if (arg->value[0] == '@' && arg->ref)
1880 /* Dereferencing arguments */
1882 depth = __synthesize_probe_trace_arg_ref(ref, buf, 1);
1887 /* Print argument value */
1888 if (arg->value[0] == '@' && arg->ref)
1889 err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset);
1891 err = strbuf_addstr(buf, arg->value);
1894 while (!err && depth--)
1895 err = strbuf_addch(buf, ')');
1897 /* Print argument type */
1898 if (!err && arg->type)
1899 err = strbuf_addf(buf, ":%s", arg->type);
1904 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
1906 struct probe_trace_point *tp = &tev->point;
1911 /* Uprobes must have tp->module */
1912 if (tev->uprobes && !tp->module)
1915 if (strbuf_init(&buf, 32) < 0)
1918 if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
1919 tev->group, tev->event) < 0)
1922 * If tp->address == 0, then this point must be a
1923 * absolute address uprobe.
1924 * try_to_find_absolute_address() should have made
1925 * tp->symbol to "0x0".
1927 if (tev->uprobes && !tp->address) {
1928 if (!tp->symbol || strcmp(tp->symbol, "0x0"))
1932 /* Use the tp->address for uprobes */
1934 err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address);
1935 else if (!strncmp(tp->symbol, "0x", 2))
1936 /* Absolute address. See try_to_find_absolute_address() */
1937 err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "",
1938 tp->module ? ":" : "", tp->address);
1940 err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "",
1941 tp->module ? ":" : "", tp->symbol, tp->offset);
1945 for (i = 0; i < tev->nargs; i++)
1946 if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0)
1949 ret = strbuf_detach(&buf, NULL);
1951 strbuf_release(&buf);
1955 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
1956 struct perf_probe_point *pp,
1959 struct symbol *sym = NULL;
1961 u64 addr = tp->address;
1965 map = dso__new_map(tp->module);
1968 sym = map__find_symbol(map, addr, NULL);
1970 if (tp->symbol && !addr) {
1971 if (kernel_get_symbol_address_by_name(tp->symbol,
1972 &addr, true, false) < 0)
1977 sym = __find_kernel_function(addr, &map);
1984 pp->retprobe = tp->retprobe;
1985 pp->offset = addr - map->unmap_ip(map, sym->start);
1986 pp->function = strdup(sym->name);
1987 ret = pp->function ? 0 : -ENOMEM;
1990 if (map && !is_kprobe) {
1997 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
1998 struct perf_probe_point *pp,
2004 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
2007 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
2011 pr_debug("Failed to find probe point from both of dwarf and map.\n");
2014 pp->function = strdup(tp->symbol);
2015 pp->offset = tp->offset;
2017 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
2020 pp->function = strdup(buf);
2023 if (pp->function == NULL)
2026 pp->retprobe = tp->retprobe;
2031 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
2032 struct perf_probe_event *pev, bool is_kprobe)
2034 struct strbuf buf = STRBUF_INIT;
2037 /* Convert event/group name */
2038 pev->event = strdup(tev->event);
2039 pev->group = strdup(tev->group);
2040 if (pev->event == NULL || pev->group == NULL)
2043 /* Convert trace_point to probe_point */
2044 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
2048 /* Convert trace_arg to probe_arg */
2049 pev->nargs = tev->nargs;
2050 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
2051 if (pev->args == NULL)
2053 for (i = 0; i < tev->nargs && ret >= 0; i++) {
2054 if (tev->args[i].name)
2055 pev->args[i].name = strdup(tev->args[i].name);
2057 if ((ret = strbuf_init(&buf, 32)) < 0)
2059 ret = synthesize_probe_trace_arg(&tev->args[i], &buf);
2060 pev->args[i].name = strbuf_detach(&buf, NULL);
2062 if (pev->args[i].name == NULL && ret >= 0)
2067 clear_perf_probe_event(pev);
2072 void clear_perf_probe_event(struct perf_probe_event *pev)
2074 struct perf_probe_arg_field *field, *next;
2080 clear_perf_probe_point(&pev->point);
2082 for (i = 0; i < pev->nargs; i++) {
2083 free(pev->args[i].name);
2084 free(pev->args[i].var);
2085 free(pev->args[i].type);
2086 field = pev->args[i].field;
2089 zfree(&field->name);
2095 memset(pev, 0, sizeof(*pev));
2098 #define strdup_or_goto(str, label) \
2099 ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; })
2101 static int perf_probe_point__copy(struct perf_probe_point *dst,
2102 struct perf_probe_point *src)
2104 dst->file = strdup_or_goto(src->file, out_err);
2105 dst->function = strdup_or_goto(src->function, out_err);
2106 dst->lazy_line = strdup_or_goto(src->lazy_line, out_err);
2107 dst->line = src->line;
2108 dst->retprobe = src->retprobe;
2109 dst->offset = src->offset;
2113 clear_perf_probe_point(dst);
2117 static int perf_probe_arg__copy(struct perf_probe_arg *dst,
2118 struct perf_probe_arg *src)
2120 struct perf_probe_arg_field *field, **ppfield;
2122 dst->name = strdup_or_goto(src->name, out_err);
2123 dst->var = strdup_or_goto(src->var, out_err);
2124 dst->type = strdup_or_goto(src->type, out_err);
2127 ppfield = &(dst->field);
2129 *ppfield = zalloc(sizeof(*field));
2132 (*ppfield)->name = strdup_or_goto(field->name, out_err);
2133 (*ppfield)->index = field->index;
2134 (*ppfield)->ref = field->ref;
2135 field = field->next;
2136 ppfield = &((*ppfield)->next);
2143 int perf_probe_event__copy(struct perf_probe_event *dst,
2144 struct perf_probe_event *src)
2148 dst->event = strdup_or_goto(src->event, out_err);
2149 dst->group = strdup_or_goto(src->group, out_err);
2150 dst->target = strdup_or_goto(src->target, out_err);
2151 dst->uprobes = src->uprobes;
2153 if (perf_probe_point__copy(&dst->point, &src->point) < 0)
2156 dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs);
2159 dst->nargs = src->nargs;
2161 for (i = 0; i < src->nargs; i++)
2162 if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0)
2167 clear_perf_probe_event(dst);
2171 void clear_probe_trace_event(struct probe_trace_event *tev)
2173 struct probe_trace_arg_ref *ref, *next;
2178 free(tev->point.symbol);
2179 free(tev->point.realname);
2180 free(tev->point.module);
2181 for (i = 0; i < tev->nargs; i++) {
2182 free(tev->args[i].name);
2183 free(tev->args[i].value);
2184 free(tev->args[i].type);
2185 ref = tev->args[i].ref;
2193 memset(tev, 0, sizeof(*tev));
2196 struct kprobe_blacklist_node {
2197 struct list_head list;
2198 unsigned long start;
2203 static void kprobe_blacklist__delete(struct list_head *blacklist)
2205 struct kprobe_blacklist_node *node;
2207 while (!list_empty(blacklist)) {
2208 node = list_first_entry(blacklist,
2209 struct kprobe_blacklist_node, list);
2210 list_del(&node->list);
2216 static int kprobe_blacklist__load(struct list_head *blacklist)
2218 struct kprobe_blacklist_node *node;
2219 const char *__debugfs = debugfs__mountpoint();
2220 char buf[PATH_MAX], *p;
2224 if (__debugfs == NULL)
2227 ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs);
2231 fp = fopen(buf, "r");
2236 while (fgets(buf, PATH_MAX, fp)) {
2237 node = zalloc(sizeof(*node));
2242 INIT_LIST_HEAD(&node->list);
2243 list_add_tail(&node->list, blacklist);
2244 if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) {
2248 p = strchr(buf, '\t');
2251 if (p[strlen(p) - 1] == '\n')
2252 p[strlen(p) - 1] = '\0';
2254 p = (char *)"unknown";
2255 node->symbol = strdup(p);
2256 if (!node->symbol) {
2260 pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n",
2261 node->start, node->end, node->symbol);
2265 kprobe_blacklist__delete(blacklist);
2271 static struct kprobe_blacklist_node *
2272 kprobe_blacklist__find_by_address(struct list_head *blacklist,
2273 unsigned long address)
2275 struct kprobe_blacklist_node *node;
2277 list_for_each_entry(node, blacklist, list) {
2278 if (node->start <= address && address <= node->end)
2285 static LIST_HEAD(kprobe_blacklist);
2287 static void kprobe_blacklist__init(void)
2289 if (!list_empty(&kprobe_blacklist))
2292 if (kprobe_blacklist__load(&kprobe_blacklist) < 0)
2293 pr_debug("No kprobe blacklist support, ignored\n");
2296 static void kprobe_blacklist__release(void)
2298 kprobe_blacklist__delete(&kprobe_blacklist);
2301 static bool kprobe_blacklist__listed(unsigned long address)
2303 return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address);
2306 static int perf_probe_event__sprintf(const char *group, const char *event,
2307 struct perf_probe_event *pev,
2309 struct strbuf *result)
2314 if (asprintf(&buf, "%s:%s", group, event) < 0)
2316 ret = strbuf_addf(result, " %-20s (on ", buf);
2321 /* Synthesize only event probe point */
2322 buf = synthesize_perf_probe_point(&pev->point);
2325 ret = strbuf_addstr(result, buf);
2329 ret = strbuf_addf(result, " in %s", module);
2331 if (!ret && pev->nargs > 0) {
2332 ret = strbuf_add(result, " with", 5);
2333 for (i = 0; !ret && i < pev->nargs; i++) {
2334 buf = synthesize_perf_probe_arg(&pev->args[i]);
2337 ret = strbuf_addf(result, " %s", buf);
2342 ret = strbuf_addch(result, ')');
2348 int show_perf_probe_event(const char *group, const char *event,
2349 struct perf_probe_event *pev,
2350 const char *module, bool use_stdout)
2352 struct strbuf buf = STRBUF_INIT;
2355 ret = perf_probe_event__sprintf(group, event, pev, module, &buf);
2358 printf("%s\n", buf.buf);
2360 pr_info("%s\n", buf.buf);
2362 strbuf_release(&buf);
2367 static bool filter_probe_trace_event(struct probe_trace_event *tev,
2368 struct strfilter *filter)
2372 /* At first, check the event name itself */
2373 if (strfilter__compare(filter, tev->event))
2376 /* Next, check the combination of name and group */
2377 if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0)
2379 return strfilter__compare(filter, tmp);
2382 static int __show_perf_probe_events(int fd, bool is_kprobe,
2383 struct strfilter *filter)
2386 struct probe_trace_event tev;
2387 struct perf_probe_event pev;
2388 struct strlist *rawlist;
2389 struct str_node *ent;
2391 memset(&tev, 0, sizeof(tev));
2392 memset(&pev, 0, sizeof(pev));
2394 rawlist = probe_file__get_rawlist(fd);
2398 strlist__for_each_entry(ent, rawlist) {
2399 ret = parse_probe_trace_command(ent->s, &tev);
2401 if (!filter_probe_trace_event(&tev, filter))
2403 ret = convert_to_perf_probe_event(&tev, &pev,
2407 ret = show_perf_probe_event(pev.group, pev.event,
2408 &pev, tev.point.module,
2412 clear_perf_probe_event(&pev);
2413 clear_probe_trace_event(&tev);
2417 strlist__delete(rawlist);
2418 /* Cleanup cached debuginfo if needed */
2419 debuginfo_cache__exit();
2424 /* List up current perf-probe events */
2425 int show_perf_probe_events(struct strfilter *filter)
2427 int kp_fd, up_fd, ret;
2431 if (probe_conf.cache)
2432 return probe_cache__show_all_caches(filter);
2434 ret = init_probe_symbol_maps(false);
2438 ret = probe_file__open_both(&kp_fd, &up_fd, 0);
2443 ret = __show_perf_probe_events(kp_fd, true, filter);
2444 if (up_fd >= 0 && ret >= 0)
2445 ret = __show_perf_probe_events(up_fd, false, filter);
2450 exit_probe_symbol_maps();
2455 static int get_new_event_name(char *buf, size_t len, const char *base,
2456 struct strlist *namelist, bool allow_suffix)
2463 nbase = strdup(base);
2467 /* Cut off the dot suffixes (e.g. .const, .isra)*/
2468 p = strchr(nbase, '.');
2469 if (p && p != nbase)
2472 /* Try no suffix number */
2473 ret = e_snprintf(buf, len, "%s", nbase);
2475 pr_debug("snprintf() failed: %d\n", ret);
2478 if (!strlist__has_entry(namelist, buf))
2481 if (!allow_suffix) {
2482 pr_warning("Error: event \"%s\" already exists.\n"
2483 " Hint: Remove existing event by 'perf probe -d'\n"
2484 " or force duplicates by 'perf probe -f'\n"
2485 " or set 'force=yes' in BPF source.\n",
2491 /* Try to add suffix */
2492 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2493 ret = e_snprintf(buf, len, "%s_%d", nbase, i);
2495 pr_debug("snprintf() failed: %d\n", ret);
2498 if (!strlist__has_entry(namelist, buf))
2501 if (i == MAX_EVENT_INDEX) {
2502 pr_warning("Too many events are on the same function.\n");
2511 /* Warn if the current kernel's uprobe implementation is old */
2512 static void warn_uprobe_event_compat(struct probe_trace_event *tev)
2515 char *buf = synthesize_probe_trace_command(tev);
2517 /* Old uprobe event doesn't support memory dereference */
2518 if (!tev->uprobes || tev->nargs == 0 || !buf)
2521 for (i = 0; i < tev->nargs; i++)
2522 if (strglobmatch(tev->args[i].value, "[$@+-]*")) {
2523 pr_warning("Please upgrade your kernel to at least "
2524 "3.14 to have access to feature %s\n",
2525 tev->args[i].value);
2532 /* Set new name from original perf_probe_event and namelist */
2533 static int probe_trace_event__set_name(struct probe_trace_event *tev,
2534 struct perf_probe_event *pev,
2535 struct strlist *namelist,
2538 const char *event, *group;
2542 /* If probe_event or trace_event already have the name, reuse it */
2543 if (pev->event && !pev->sdt)
2545 else if (tev->event)
2548 /* Or generate new one from probe point */
2549 if (pev->point.function &&
2550 (strncmp(pev->point.function, "0x", 2) != 0) &&
2551 !strisglob(pev->point.function))
2552 event = pev->point.function;
2554 event = tev->point.realname;
2556 if (pev->group && !pev->sdt)
2558 else if (tev->group)
2561 group = PERFPROBE_GROUP;
2563 /* Get an unused new event name */
2564 ret = get_new_event_name(buf, 64, event,
2565 namelist, allow_suffix);
2571 tev->event = strdup(event);
2572 tev->group = strdup(group);
2573 if (tev->event == NULL || tev->group == NULL)
2576 /* Add added event name to namelist */
2577 strlist__add(namelist, event);
2581 static int __open_probe_file_and_namelist(bool uprobe,
2582 struct strlist **namelist)
2586 fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0));
2590 /* Get current event names */
2591 *namelist = probe_file__get_namelist(fd);
2593 pr_debug("Failed to get current event list.\n");
2600 static int __add_probe_trace_events(struct perf_probe_event *pev,
2601 struct probe_trace_event *tevs,
2602 int ntevs, bool allow_suffix)
2604 int i, fd[2] = {-1, -1}, up, ret;
2605 struct probe_trace_event *tev = NULL;
2606 struct probe_cache *cache = NULL;
2607 struct strlist *namelist[2] = {NULL, NULL};
2609 up = pev->uprobes ? 1 : 0;
2610 fd[up] = __open_probe_file_and_namelist(up, &namelist[up]);
2615 for (i = 0; i < ntevs; i++) {
2617 up = tev->uprobes ? 1 : 0;
2618 if (fd[up] == -1) { /* Open the kprobe/uprobe_events */
2619 fd[up] = __open_probe_file_and_namelist(up,
2624 /* Skip if the symbol is out of .text or blacklisted */
2625 if (!tev->point.symbol && !pev->uprobes)
2628 /* Set new name for tev (and update namelist) */
2629 ret = probe_trace_event__set_name(tev, pev, namelist[up],
2634 ret = probe_file__add_event(fd[up], tev);
2639 * Probes after the first probe which comes from same
2640 * user input are always allowed to add suffix, because
2641 * there might be several addresses corresponding to
2644 allow_suffix = true;
2646 if (ret == -EINVAL && pev->uprobes)
2647 warn_uprobe_event_compat(tev);
2648 if (ret == 0 && probe_conf.cache) {
2649 cache = probe_cache__new(pev->target);
2651 probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 ||
2652 probe_cache__commit(cache) < 0)
2653 pr_warning("Failed to add event to probe cache\n");
2654 probe_cache__delete(cache);
2658 for (up = 0; up < 2; up++) {
2659 strlist__delete(namelist[up]);
2666 static int find_probe_functions(struct map *map, char *name,
2667 struct symbol **syms)
2671 struct rb_node *tmp;
2673 if (map__load(map, NULL) < 0)
2676 map__for_each_symbol(map, sym, tmp) {
2677 if (strglobmatch(sym->name, name)) {
2679 if (syms && found < probe_conf.max_probes)
2680 syms[found - 1] = sym;
2687 void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused,
2688 struct probe_trace_event *tev __maybe_unused,
2689 struct map *map __maybe_unused,
2690 struct symbol *sym __maybe_unused) { }
2693 * Find probe function addresses from map.
2694 * Return an error or the number of found probe_trace_event
2696 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2697 struct probe_trace_event **tevs)
2699 struct map *map = NULL;
2700 struct ref_reloc_sym *reloc_sym = NULL;
2702 struct symbol **syms = NULL;
2703 struct probe_trace_event *tev;
2704 struct perf_probe_point *pp = &pev->point;
2705 struct probe_trace_point *tp;
2706 int num_matched_functions;
2707 int ret, i, j, skipped = 0;
2710 map = get_target_map(pev->target, pev->uprobes);
2716 syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes);
2723 * Load matched symbols: Since the different local symbols may have
2724 * same name but different addresses, this lists all the symbols.
2726 num_matched_functions = find_probe_functions(map, pp->function, syms);
2727 if (num_matched_functions == 0) {
2728 pr_err("Failed to find symbol %s in %s\n", pp->function,
2729 pev->target ? : "kernel");
2732 } else if (num_matched_functions > probe_conf.max_probes) {
2733 pr_err("Too many functions matched in %s\n",
2734 pev->target ? : "kernel");
2739 /* Note that the symbols in the kmodule are not relocated */
2740 if (!pev->uprobes && !pp->retprobe && !pev->target) {
2741 reloc_sym = kernel_get_ref_reloc_sym();
2743 pr_warning("Relocated base symbol is not found!\n");
2749 /* Setup result trace-probe-events */
2750 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2758 for (j = 0; j < num_matched_functions; j++) {
2761 tev = (*tevs) + ret;
2763 if (ret == num_matched_functions) {
2764 pr_warning("Too many symbols are listed. Skip it.\n");
2769 if (pp->offset > sym->end - sym->start) {
2770 pr_warning("Offset %ld is bigger than the size of %s\n",
2771 pp->offset, sym->name);
2775 /* Add one probe point */
2776 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2778 /* Check the kprobe (not in module) is within .text */
2779 if (!pev->uprobes && !pev->target &&
2780 kprobe_warn_out_range(sym->name, tp->address)) {
2781 tp->symbol = NULL; /* Skip it */
2783 } else if (reloc_sym) {
2784 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2785 tp->offset = tp->address - reloc_sym->addr;
2787 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2788 tp->offset = pp->offset;
2790 tp->realname = strdup_or_goto(sym->name, nomem_out);
2792 tp->retprobe = pp->retprobe;
2795 tev->point.module = strdup_or_goto(pev->target,
2798 mod_name = find_module_name(pev->target);
2800 strdup(mod_name ? mod_name : pev->target);
2802 if (!tev->point.module)
2806 tev->uprobes = pev->uprobes;
2807 tev->nargs = pev->nargs;
2809 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2811 if (tev->args == NULL)
2814 for (i = 0; i < tev->nargs; i++) {
2815 if (pev->args[i].name)
2817 strdup_or_goto(pev->args[i].name,
2820 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2822 if (pev->args[i].type)
2824 strdup_or_goto(pev->args[i].type,
2827 arch__fix_tev_from_maps(pev, tev, map, sym);
2829 if (ret == skipped) {
2835 put_target_map(map, pev->uprobes);
2842 clear_probe_trace_events(*tevs, num_matched_functions);
2847 static int try_to_find_absolute_address(struct perf_probe_event *pev,
2848 struct probe_trace_event **tevs)
2850 struct perf_probe_point *pp = &pev->point;
2851 struct probe_trace_event *tev;
2852 struct probe_trace_point *tp;
2855 if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2)))
2857 if (perf_probe_event_need_dwarf(pev))
2861 * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at
2864 * Only one tev can be generated by this.
2866 *tevs = zalloc(sizeof(*tev));
2874 * Don't use tp->offset, use address directly, because
2875 * in synthesize_probe_trace_command() address cannot be
2878 tp->address = pev->point.abs_address;
2879 tp->retprobe = pp->retprobe;
2880 tev->uprobes = pev->uprobes;
2884 * Give it a '0x' leading symbol name.
2885 * In __add_probe_trace_events, a NULL symbol is interpreted as
2888 if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0)
2891 /* For kprobe, check range */
2892 if ((!tev->uprobes) &&
2893 (kprobe_warn_out_range(tev->point.symbol,
2894 tev->point.address))) {
2899 if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0)
2903 tp->module = strdup(pev->target);
2909 tev->group = strdup(pev->group);
2915 tev->event = strdup(pev->event);
2920 tev->nargs = pev->nargs;
2921 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
2926 for (i = 0; i < tev->nargs; i++)
2927 copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]);
2933 clear_probe_trace_events(*tevs, 1);
2939 bool __weak arch__prefers_symtab(void) { return false; }
2941 /* Concatinate two arrays */
2942 static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b)
2946 ret = malloc(sz_a + sz_b);
2948 memcpy(ret, a, sz_a);
2949 memcpy(ret + sz_a, b, sz_b);
2955 concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs,
2956 struct probe_trace_event **tevs2, int ntevs2)
2958 struct probe_trace_event *new_tevs;
2968 if (*ntevs + ntevs2 > probe_conf.max_probes)
2971 /* Concatinate the array of probe_trace_event */
2972 new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs),
2973 *tevs2, ntevs2 * sizeof(**tevs2));
2983 clear_probe_trace_events(*tevs2, ntevs2);
2990 * Try to find probe_trace_event from given probe caches. Return the number
2991 * of cached events found, if an error occurs return the error.
2993 static int find_cached_events(struct perf_probe_event *pev,
2994 struct probe_trace_event **tevs,
2997 struct probe_cache *cache;
2998 struct probe_cache_entry *entry;
2999 struct probe_trace_event *tmp_tevs = NULL;
3003 cache = probe_cache__new(target);
3004 /* Return 0 ("not found") if the target has no probe cache. */
3008 for_each_probe_cache_entry(entry, cache) {
3009 /* Skip the cache entry which has no name */
3010 if (!entry->pev.event || !entry->pev.group)
3012 if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) &&
3013 strglobmatch(entry->pev.event, pev->event)) {
3014 ret = probe_cache_entry__get_event(entry, &tmp_tevs);
3016 ret = concat_probe_trace_events(tevs, &ntevs,
3022 probe_cache__delete(cache);
3024 clear_probe_trace_events(*tevs, ntevs);
3028 if (ntevs > 0 && target && target[0] == '/')
3029 pev->uprobes = true;
3035 /* Try to find probe_trace_event from all probe caches */
3036 static int find_cached_events_all(struct perf_probe_event *pev,
3037 struct probe_trace_event **tevs)
3039 struct probe_trace_event *tmp_tevs = NULL;
3040 struct strlist *bidlist;
3041 struct str_node *nd;
3046 /* Get the buildid list of all valid caches */
3047 bidlist = build_id_cache__list_all(true);
3050 pr_debug("Failed to get buildids: %d\n", ret);
3055 strlist__for_each_entry(nd, bidlist) {
3056 pathname = build_id_cache__origname(nd->s);
3057 ret = find_cached_events(pev, &tmp_tevs, pathname);
3058 /* In the case of cnt == 0, we just skip it */
3060 ret = concat_probe_trace_events(tevs, &ntevs,
3066 strlist__delete(bidlist);
3069 clear_probe_trace_events(*tevs, ntevs);
3077 static int find_probe_trace_events_from_cache(struct perf_probe_event *pev,
3078 struct probe_trace_event **tevs)
3080 struct probe_cache *cache;
3081 struct probe_cache_entry *entry;
3082 struct probe_trace_event *tev;
3083 struct str_node *node;
3087 /* For SDT/cached events, we use special search functions */
3089 return find_cached_events_all(pev, tevs);
3091 return find_cached_events(pev, tevs, pev->target);
3093 cache = probe_cache__new(pev->target);
3097 entry = probe_cache__find(cache, pev);
3099 /* SDT must be in the cache */
3100 ret = pev->sdt ? -ENOENT : 0;
3104 ret = strlist__nr_entries(entry->tevlist);
3105 if (ret > probe_conf.max_probes) {
3106 pr_debug("Too many entries matched in the cache of %s\n",
3107 pev->target ? : "kernel");
3112 *tevs = zalloc(ret * sizeof(*tev));
3119 strlist__for_each_entry(node, entry->tevlist) {
3120 tev = &(*tevs)[i++];
3121 ret = parse_probe_trace_command(node->s, tev);
3124 /* Set the uprobes attribute as same as original */
3125 tev->uprobes = pev->uprobes;
3130 probe_cache__delete(cache);
3134 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
3135 struct probe_trace_event **tevs)
3139 if (!pev->group && !pev->sdt) {
3140 /* Set group name if not given */
3141 if (!pev->uprobes) {
3142 pev->group = strdup(PERFPROBE_GROUP);
3143 ret = pev->group ? 0 : -ENOMEM;
3145 ret = convert_exec_to_group(pev->target, &pev->group);
3147 pr_warning("Failed to make a group name.\n");
3152 ret = try_to_find_absolute_address(pev, tevs);
3156 /* At first, we need to lookup cache entry */
3157 ret = find_probe_trace_events_from_cache(pev, tevs);
3158 if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */
3159 return ret == 0 ? -ENOENT : ret; /* Found in probe cache */
3161 if (arch__prefers_symtab() && !perf_probe_event_need_dwarf(pev)) {
3162 ret = find_probe_trace_events_from_map(pev, tevs);
3164 return ret; /* Found in symbol table */
3167 /* Convert perf_probe_event with debuginfo */
3168 ret = try_to_find_probe_trace_events(pev, tevs);
3170 return ret; /* Found in debuginfo or got an error */
3172 return find_probe_trace_events_from_map(pev, tevs);
3175 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3179 /* Loop 1: convert all events */
3180 for (i = 0; i < npevs; i++) {
3181 /* Init kprobe blacklist if needed */
3182 if (!pevs[i].uprobes)
3183 kprobe_blacklist__init();
3184 /* Convert with or without debuginfo */
3185 ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs);
3188 pevs[i].ntevs = ret;
3190 /* This just release blacklist only if allocated */
3191 kprobe_blacklist__release();
3196 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3200 /* Loop 2: add all events */
3201 for (i = 0; i < npevs; i++) {
3202 ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs,
3204 probe_conf.force_add);
3211 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3215 /* Loop 3: cleanup and free trace events */
3216 for (i = 0; i < npevs; i++) {
3217 for (j = 0; j < pevs[i].ntevs; j++)
3218 clear_probe_trace_event(&pevs[i].tevs[j]);
3219 zfree(&pevs[i].tevs);
3221 clear_perf_probe_event(&pevs[i]);
3225 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3229 ret = init_probe_symbol_maps(pevs->uprobes);
3233 ret = convert_perf_probe_events(pevs, npevs);
3235 ret = apply_perf_probe_events(pevs, npevs);
3237 cleanup_perf_probe_events(pevs, npevs);
3239 exit_probe_symbol_maps();
3243 int del_perf_probe_events(struct strfilter *filter)
3245 int ret, ret2, ufd = -1, kfd = -1;
3246 char *str = strfilter__string(filter);
3251 /* Get current event names */
3252 ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
3256 ret = probe_file__del_events(kfd, filter);
3257 if (ret < 0 && ret != -ENOENT)
3260 ret2 = probe_file__del_events(ufd, filter);
3261 if (ret2 < 0 && ret2 != -ENOENT) {
3278 /* TODO: don't use a global variable for filter ... */
3279 static struct strfilter *available_func_filter;
3282 * If a symbol corresponds to a function with global binding and
3283 * matches filter return 0. For all others return 1.
3285 static int filter_available_functions(struct map *map __maybe_unused,
3288 if (strfilter__compare(available_func_filter, sym->name))
3293 int show_available_funcs(const char *target, struct strfilter *_filter,
3299 ret = init_probe_symbol_maps(user);
3303 /* Get a symbol map */
3305 map = dso__new_map(target);
3307 map = kernel_get_module_map(target);
3309 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
3313 /* Load symbols with given filter */
3314 available_func_filter = _filter;
3315 ret = map__load(map, filter_available_functions);
3318 char *str = strfilter__string(_filter);
3319 pr_err("Failed to find symbols matched to \"%s\"\n",
3323 pr_err("Failed to load symbols in %s\n",
3324 (target) ? : "kernel");
3327 if (!dso__sorted_by_name(map->dso, map->type))
3328 dso__sort_by_name(map->dso, map->type);
3330 /* Show all (filtered) symbols */
3332 dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
3337 exit_probe_symbol_maps();
3342 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
3343 struct perf_probe_arg *pvar)
3345 tvar->value = strdup(pvar->var);
3346 if (tvar->value == NULL)
3349 tvar->type = strdup(pvar->type);
3350 if (tvar->type == NULL)
3354 tvar->name = strdup(pvar->name);
3355 if (tvar->name == NULL)