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 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) {
670 post_process_kernel_probe_trace_events(struct probe_trace_event *tevs,
673 struct ref_reloc_sym *reloc_sym;
677 reloc_sym = kernel_get_ref_reloc_sym();
679 pr_warning("Relocated base symbol is not found!\n");
683 for (i = 0; i < ntevs; i++) {
684 if (!tevs[i].point.address || tevs[i].point.retprobe)
686 /* If we found a wrong one, mark it by NULL symbol */
687 if (kprobe_warn_out_range(tevs[i].point.symbol,
688 tevs[i].point.address)) {
692 tmp = strdup(reloc_sym->name);
696 /* If we have no realname, use symbol for it */
697 if (!tevs[i].point.realname)
698 tevs[i].point.realname = tevs[i].point.symbol;
700 free(tevs[i].point.symbol);
701 tevs[i].point.symbol = tmp;
702 tevs[i].point.offset = tevs[i].point.address -
703 reloc_sym->unrelocated_addr;
709 arch__post_process_probe_trace_events(struct perf_probe_event *pev __maybe_unused,
710 int ntevs __maybe_unused)
714 /* Post processing the probe events */
715 static int post_process_probe_trace_events(struct perf_probe_event *pev,
716 struct probe_trace_event *tevs,
717 int ntevs, const char *module,
723 ret = add_exec_to_probe_trace_events(tevs, ntevs, module);
725 /* Currently ref_reloc_sym based probe is not for drivers */
726 ret = add_module_to_probe_trace_events(tevs, ntevs, module);
728 ret = post_process_kernel_probe_trace_events(tevs, ntevs);
731 arch__post_process_probe_trace_events(pev, ntevs);
736 /* Try to find perf_probe_event with debuginfo */
737 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
738 struct probe_trace_event **tevs)
740 bool need_dwarf = perf_probe_event_need_dwarf(pev);
741 struct perf_probe_point tmp;
742 struct debuginfo *dinfo;
745 dinfo = open_debuginfo(pev->target, !need_dwarf);
749 pr_debug("Could not open debuginfo. Try to use symbols.\n");
753 pr_debug("Try to find probe point from debuginfo.\n");
754 /* Searching trace events corresponding to a probe event */
755 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
757 if (ntevs == 0) { /* Not found, retry with an alternative */
758 ret = get_alternative_probe_event(dinfo, pev, &tmp);
760 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
762 * Write back to the original probe_event for
763 * setting appropriate (user given) event name
765 clear_perf_probe_point(&pev->point);
766 memcpy(&pev->point, &tmp, sizeof(tmp));
770 debuginfo__delete(dinfo);
772 if (ntevs > 0) { /* Succeeded to find trace events */
773 pr_debug("Found %d probe_trace_events.\n", ntevs);
774 ret = post_process_probe_trace_events(pev, *tevs, ntevs,
775 pev->target, pev->uprobes);
776 if (ret < 0 || ret == ntevs) {
777 clear_probe_trace_events(*tevs, ntevs);
781 return ret < 0 ? ret : ntevs;
786 if (ntevs == 0) { /* No error but failed to find probe point. */
787 pr_warning("Probe point '%s' not found.\n",
788 synthesize_perf_probe_point(&pev->point));
791 /* Error path : ntevs < 0 */
792 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
795 pr_warning("Warning: No dwarf info found in the vmlinux - "
796 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
798 pr_debug("Trying to use symbols.\n");
805 #define LINEBUF_SIZE 256
806 #define NR_ADDITIONAL_LINES 2
808 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
810 char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE];
811 const char *color = show_num ? "" : PERF_COLOR_BLUE;
812 const char *prefix = NULL;
815 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
820 prefix = show_num ? "%7d " : " ";
821 color_fprintf(stdout, color, prefix, l);
823 color_fprintf(stdout, color, "%s", buf);
825 } while (strchr(buf, '\n') == NULL);
830 pr_warning("File read error: %s\n",
831 str_error_r(errno, sbuf, sizeof(sbuf)));
837 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
839 int rv = __show_one_line(fp, l, skip, show_num);
841 pr_warning("Source file is shorter than expected.\n");
847 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
848 #define show_one_line(f,l) _show_one_line(f,l,false,false)
849 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
850 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
853 * Show line-range always requires debuginfo to find source file and
856 static int __show_line_range(struct line_range *lr, const char *module,
861 struct debuginfo *dinfo;
865 char sbuf[STRERR_BUFSIZE];
867 /* Search a line range */
868 dinfo = open_debuginfo(module, false);
872 ret = debuginfo__find_line_range(dinfo, lr);
873 if (!ret) { /* Not found, retry with an alternative */
874 ret = get_alternative_line_range(dinfo, lr, module, user);
876 ret = debuginfo__find_line_range(dinfo, lr);
878 debuginfo__delete(dinfo);
879 if (ret == 0 || ret == -ENOENT) {
880 pr_warning("Specified source line is not found.\n");
882 } else if (ret < 0) {
883 pr_warning("Debuginfo analysis failed.\n");
887 /* Convert source file path */
889 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
891 /* Free old path when new path is assigned */
896 pr_warning("Failed to find source file path.\n");
903 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
904 lr->start - lr->offset);
906 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
908 fp = fopen(lr->path, "r");
910 pr_warning("Failed to open %s: %s\n", lr->path,
911 str_error_r(errno, sbuf, sizeof(sbuf)));
914 /* Skip to starting line number */
915 while (l < lr->start) {
916 ret = skip_one_line(fp, l++);
921 intlist__for_each_entry(ln, lr->line_list) {
922 for (; ln->i > l; l++) {
923 ret = show_one_line(fp, l - lr->offset);
927 ret = show_one_line_with_num(fp, l++ - lr->offset);
932 if (lr->end == INT_MAX)
933 lr->end = l + NR_ADDITIONAL_LINES;
934 while (l <= lr->end) {
935 ret = show_one_line_or_eof(fp, l++ - lr->offset);
944 int show_line_range(struct line_range *lr, const char *module, bool user)
948 ret = init_probe_symbol_maps(user);
951 ret = __show_line_range(lr, module, user);
952 exit_probe_symbol_maps();
957 static int show_available_vars_at(struct debuginfo *dinfo,
958 struct perf_probe_event *pev,
959 struct strfilter *_filter)
963 struct str_node *node;
964 struct variable_list *vls = NULL, *vl;
965 struct perf_probe_point tmp;
968 buf = synthesize_perf_probe_point(&pev->point);
971 pr_debug("Searching variables at %s\n", buf);
973 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls);
974 if (!ret) { /* Not found, retry with an alternative */
975 ret = get_alternative_probe_event(dinfo, pev, &tmp);
977 ret = debuginfo__find_available_vars_at(dinfo, pev,
979 /* Release the old probe_point */
980 clear_perf_probe_point(&tmp);
984 if (ret == 0 || ret == -ENOENT) {
985 pr_err("Failed to find the address of %s\n", buf);
988 pr_warning("Debuginfo analysis failed.\n");
992 /* Some variables are found */
993 fprintf(stdout, "Available variables at %s\n", buf);
994 for (i = 0; i < ret; i++) {
997 * A probe point might be converted to
998 * several trace points.
1000 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
1002 zfree(&vl->point.symbol);
1005 strlist__for_each_entry(node, vl->vars) {
1006 var = strchr(node->s, '\t') + 1;
1007 if (strfilter__compare(_filter, var)) {
1008 fprintf(stdout, "\t\t%s\n", node->s);
1012 strlist__delete(vl->vars);
1015 fprintf(stdout, "\t\t(No matched variables)\n");
1023 /* Show available variables on given probe point */
1024 int show_available_vars(struct perf_probe_event *pevs, int npevs,
1025 struct strfilter *_filter)
1028 struct debuginfo *dinfo;
1030 ret = init_probe_symbol_maps(pevs->uprobes);
1034 dinfo = open_debuginfo(pevs->target, false);
1042 for (i = 0; i < npevs && ret >= 0; i++)
1043 ret = show_available_vars_at(dinfo, &pevs[i], _filter);
1045 debuginfo__delete(dinfo);
1047 exit_probe_symbol_maps();
1051 #else /* !HAVE_DWARF_SUPPORT */
1053 static void debuginfo_cache__exit(void)
1058 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
1059 struct perf_probe_point *pp __maybe_unused,
1060 bool is_kprobe __maybe_unused)
1065 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
1066 struct probe_trace_event **tevs __maybe_unused)
1068 if (perf_probe_event_need_dwarf(pev)) {
1069 pr_warning("Debuginfo-analysis is not supported.\n");
1076 int show_line_range(struct line_range *lr __maybe_unused,
1077 const char *module __maybe_unused,
1078 bool user __maybe_unused)
1080 pr_warning("Debuginfo-analysis is not supported.\n");
1084 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
1085 int npevs __maybe_unused,
1086 struct strfilter *filter __maybe_unused)
1088 pr_warning("Debuginfo-analysis is not supported.\n");
1093 void line_range__clear(struct line_range *lr)
1099 intlist__delete(lr->line_list);
1100 memset(lr, 0, sizeof(*lr));
1103 int line_range__init(struct line_range *lr)
1105 memset(lr, 0, sizeof(*lr));
1106 lr->line_list = intlist__new(NULL);
1113 static int parse_line_num(char **ptr, int *val, const char *what)
1115 const char *start = *ptr;
1118 *val = strtol(*ptr, ptr, 0);
1119 if (errno || *ptr == start) {
1120 semantic_error("'%s' is not a valid number.\n", what);
1126 /* Check the name is good for event, group or function */
1127 static bool is_c_func_name(const char *name)
1129 if (!isalpha(*name) && *name != '_')
1131 while (*++name != '\0') {
1132 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
1139 * Stuff 'lr' according to the line range described by 'arg'.
1140 * The line range syntax is described by:
1142 * SRC[:SLN[+NUM|-ELN]]
1143 * FNC[@SRC][:SLN[+NUM|-ELN]]
1145 int parse_line_range_desc(const char *arg, struct line_range *lr)
1147 char *range, *file, *name = strdup(arg);
1156 range = strchr(name, ':');
1160 err = parse_line_num(&range, &lr->start, "start line");
1164 if (*range == '+' || *range == '-') {
1165 const char c = *range++;
1167 err = parse_line_num(&range, &lr->end, "end line");
1172 lr->end += lr->start;
1174 * Adjust the number of lines here.
1175 * If the number of lines == 1, the
1176 * the end of line should be equal to
1177 * the start of line.
1183 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
1186 if (lr->start > lr->end) {
1187 semantic_error("Start line must be smaller"
1188 " than end line.\n");
1191 if (*range != '\0') {
1192 semantic_error("Tailing with invalid str '%s'.\n", range);
1197 file = strchr(name, '@');
1200 lr->file = strdup(++file);
1201 if (lr->file == NULL) {
1205 lr->function = name;
1206 } else if (strchr(name, '/') || strchr(name, '.'))
1208 else if (is_c_func_name(name))/* We reuse it for checking funcname */
1209 lr->function = name;
1210 else { /* Invalid name */
1211 semantic_error("'%s' is not a valid function name.\n", name);
1222 static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev)
1226 ptr = strchr(*arg, ':');
1229 if (!pev->sdt && !is_c_func_name(*arg))
1231 pev->group = strdup(*arg);
1237 if (!pev->sdt && !is_c_func_name(*arg)) {
1239 semantic_error("%s is bad for event name -it must "
1240 "follow C symbol-naming rule.\n", *arg);
1243 pev->event = strdup(*arg);
1244 if (pev->event == NULL)
1250 /* Parse probepoint definition. */
1251 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
1253 struct perf_probe_point *pp = &pev->point;
1256 bool file_spec = false;
1261 * perf probe [GRP:][EVENT=]SRC[:LN|;PTN]
1262 * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
1263 * perf probe %[GRP:]SDT_EVENT
1269 * If the probe point starts with '%',
1270 * or starts with "sdt_" and has a ':' but no '=',
1271 * then it should be a SDT/cached probe point.
1273 if (arg[0] == '%' ||
1274 (!strncmp(arg, "sdt_", 4) &&
1275 !!strchr(arg, ':') && !strchr(arg, '='))) {
1281 ptr = strpbrk(arg, ";=@+%");
1285 semantic_error("%s must be an SDT name.\n",
1289 /* This must be a target file name or build id */
1290 tmp = build_id_cache__complement(ptr + 1);
1292 pev->target = build_id_cache__origname(tmp);
1295 pev->target = strdup(ptr + 1);
1300 ret = parse_perf_probe_event_name(&arg, pev);
1302 if (asprintf(&pev->point.function, "%%%s", pev->event) < 0)
1308 if (ptr && *ptr == '=') { /* Event name */
1311 ret = parse_perf_probe_event_name(&arg, pev);
1319 * Check arg is function or file name and copy it.
1321 * We consider arg to be a file spec if and only if it satisfies
1322 * all of the below criteria::
1323 * - it does not include any of "+@%",
1324 * - it includes one of ":;", and
1325 * - it has a period '.' in the name.
1327 * Otherwise, we consider arg to be a function specification.
1329 if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) {
1330 /* This is a file spec if it includes a '.' before ; or : */
1331 if (memchr(arg, '.', ptr - arg))
1335 ptr = strpbrk(arg, ";:+@%");
1355 * Keep pp->function even if this is absolute address,
1356 * so it can mark whether abs_address is valid.
1357 * Which make 'perf probe lib.bin 0x0' possible.
1359 * Note that checking length of tmp is not needed
1360 * because when we access tmp[1] we know tmp[0] is '0',
1361 * so tmp[1] should always valid (but could be '\0').
1363 if (tmp && !strncmp(tmp, "0x", 2)) {
1364 pp->abs_address = strtoul(pp->function, &tmp, 0);
1366 semantic_error("Invalid absolute address.\n");
1372 /* Parse other options */
1376 if (c == ';') { /* Lazy pattern must be the last part */
1377 pp->lazy_line = strdup(arg);
1378 if (pp->lazy_line == NULL)
1382 ptr = strpbrk(arg, ";:+@%");
1388 case ':': /* Line number */
1389 pp->line = strtoul(arg, &tmp, 0);
1391 semantic_error("There is non-digit char"
1392 " in line number.\n");
1396 case '+': /* Byte offset from a symbol */
1397 pp->offset = strtoul(arg, &tmp, 0);
1399 semantic_error("There is non-digit character"
1404 case '@': /* File name */
1406 semantic_error("SRC@SRC is not allowed.\n");
1409 pp->file = strdup(arg);
1410 if (pp->file == NULL)
1413 case '%': /* Probe places */
1414 if (strcmp(arg, "return") == 0) {
1416 } else { /* Others not supported yet */
1417 semantic_error("%%%s is not supported.\n", arg);
1421 default: /* Buggy case */
1422 pr_err("This program has a bug at %s:%d.\n",
1423 __FILE__, __LINE__);
1429 /* Exclusion check */
1430 if (pp->lazy_line && pp->line) {
1431 semantic_error("Lazy pattern can't be used with"
1436 if (pp->lazy_line && pp->offset) {
1437 semantic_error("Lazy pattern can't be used with offset.\n");
1441 if (pp->line && pp->offset) {
1442 semantic_error("Offset can't be used with line number.\n");
1446 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1447 semantic_error("File always requires line number or "
1452 if (pp->offset && !pp->function) {
1453 semantic_error("Offset requires an entry function.\n");
1457 if (pp->retprobe && !pp->function) {
1458 semantic_error("Return probe requires an entry function.\n");
1462 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1463 semantic_error("Offset/Line/Lazy pattern can't be used with "
1468 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1469 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1474 /* Parse perf-probe event argument */
1475 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1477 char *tmp, *goodname;
1478 struct perf_probe_arg_field **fieldp;
1480 pr_debug("parsing arg: %s into ", str);
1482 tmp = strchr(str, '=');
1484 arg->name = strndup(str, tmp - str);
1485 if (arg->name == NULL)
1487 pr_debug("name:%s ", arg->name);
1491 tmp = strchr(str, ':');
1492 if (tmp) { /* Type setting */
1494 arg->type = strdup(tmp + 1);
1495 if (arg->type == NULL)
1497 pr_debug("type:%s ", arg->type);
1500 tmp = strpbrk(str, "-.[");
1501 if (!is_c_varname(str) || !tmp) {
1502 /* A variable, register, symbol or special value */
1503 arg->var = strdup(str);
1504 if (arg->var == NULL)
1506 pr_debug("%s\n", arg->var);
1510 /* Structure fields or array element */
1511 arg->var = strndup(str, tmp - str);
1512 if (arg->var == NULL)
1514 goodname = arg->var;
1515 pr_debug("%s, ", arg->var);
1516 fieldp = &arg->field;
1519 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1520 if (*fieldp == NULL)
1522 if (*tmp == '[') { /* Array */
1524 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1525 (*fieldp)->ref = true;
1526 if (*tmp != ']' || tmp == str + 1) {
1527 semantic_error("Array index must be a"
1534 } else { /* Structure */
1537 (*fieldp)->ref = false;
1538 } else if (tmp[1] == '>') {
1540 (*fieldp)->ref = true;
1542 semantic_error("Argument parse error: %s\n",
1546 tmp = strpbrk(str, "-.[");
1549 (*fieldp)->name = strndup(str, tmp - str);
1550 if ((*fieldp)->name == NULL)
1553 goodname = (*fieldp)->name;
1554 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1555 fieldp = &(*fieldp)->next;
1558 (*fieldp)->name = strdup(str);
1559 if ((*fieldp)->name == NULL)
1562 goodname = (*fieldp)->name;
1563 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1565 /* If no name is specified, set the last field name (not array index)*/
1567 arg->name = strdup(goodname);
1568 if (arg->name == NULL)
1574 /* Parse perf-probe event command */
1575 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1578 int argc, i, ret = 0;
1580 argv = argv_split(cmd, &argc);
1582 pr_debug("Failed to split arguments.\n");
1585 if (argc - 1 > MAX_PROBE_ARGS) {
1586 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1590 /* Parse probe point */
1591 ret = parse_perf_probe_point(argv[0], pev);
1595 /* Copy arguments and ensure return probe has no C argument */
1596 pev->nargs = argc - 1;
1597 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1598 if (pev->args == NULL) {
1602 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1603 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1605 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1606 semantic_error("You can't specify local variable for"
1617 /* Return true if this perf_probe_event requires debuginfo */
1618 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1622 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1625 for (i = 0; i < pev->nargs; i++)
1626 if (is_c_varname(pev->args[i].var) ||
1627 !strcmp(pev->args[i].var, "$params") ||
1628 !strcmp(pev->args[i].var, "$vars"))
1634 /* Parse probe_events event into struct probe_point */
1635 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev)
1637 struct probe_trace_point *tp = &tev->point;
1640 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1644 pr_debug("Parsing probe_events: %s\n", cmd);
1645 argv = argv_split(cmd, &argc);
1647 pr_debug("Failed to split arguments.\n");
1651 semantic_error("Too few probe arguments.\n");
1656 /* Scan event and group name. */
1657 argv0_str = strdup(argv[0]);
1658 if (argv0_str == NULL) {
1662 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1663 fmt2_str = strtok_r(NULL, "/", &fmt);
1664 fmt3_str = strtok_r(NULL, " \t", &fmt);
1665 if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
1666 || fmt3_str == NULL) {
1667 semantic_error("Failed to parse event name: %s\n", argv[0]);
1672 tev->group = strdup(fmt2_str);
1673 tev->event = strdup(fmt3_str);
1674 if (tev->group == NULL || tev->event == NULL) {
1678 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1680 tp->retprobe = (pr == 'r');
1682 /* Scan module name(if there), function name and offset */
1683 p = strchr(argv[1], ':');
1685 tp->module = strndup(argv[1], p - argv[1]);
1690 tev->uprobes = (tp->module[0] == '/');
1694 fmt1_str = strtok_r(p, "+", &fmt);
1695 /* only the address started with 0x */
1696 if (fmt1_str[0] == '0') {
1698 * Fix a special case:
1699 * if address == 0, kernel reports something like:
1700 * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax
1701 * Newer kernel may fix that, but we want to
1702 * support old kernel also.
1704 if (strcmp(fmt1_str, "0x") == 0) {
1705 if (!argv[2] || strcmp(argv[2], "(null)")) {
1712 for (i = 2; argv[i + 1] != NULL; i++)
1713 argv[i] = argv[i + 1];
1718 tp->address = strtoul(fmt1_str, NULL, 0);
1720 /* Only the symbol-based probe has offset */
1721 tp->symbol = strdup(fmt1_str);
1722 if (tp->symbol == NULL) {
1726 fmt2_str = strtok_r(NULL, "", &fmt);
1727 if (fmt2_str == NULL)
1730 tp->offset = strtoul(fmt2_str, NULL, 10);
1733 tev->nargs = argc - 2;
1734 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1735 if (tev->args == NULL) {
1739 for (i = 0; i < tev->nargs; i++) {
1740 p = strchr(argv[i + 2], '=');
1741 if (p) /* We don't need which register is assigned. */
1745 tev->args[i].name = strdup(argv[i + 2]);
1746 /* TODO: parse regs and offset */
1747 tev->args[i].value = strdup(p);
1748 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1760 /* Compose only probe arg */
1761 char *synthesize_perf_probe_arg(struct perf_probe_arg *pa)
1763 struct perf_probe_arg_field *field = pa->field;
1768 if (strbuf_init(&buf, 64) < 0)
1771 if (pa->name && pa->var)
1772 err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var);
1774 err = strbuf_addstr(&buf, pa->name ?: pa->var);
1779 if (field->name[0] == '[')
1780 err = strbuf_addstr(&buf, field->name);
1782 err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".",
1784 field = field->next;
1790 if (strbuf_addf(&buf, ":%s", pa->type) < 0)
1793 ret = strbuf_detach(&buf, NULL);
1795 strbuf_release(&buf);
1799 /* Compose only probe point (not argument) */
1800 char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1803 char *tmp, *ret = NULL;
1806 if (strbuf_init(&buf, 64) < 0)
1810 if (strbuf_addstr(&buf, pp->function) < 0)
1813 err = strbuf_addf(&buf, "+%lu", pp->offset);
1815 err = strbuf_addf(&buf, ":%d", pp->line);
1816 else if (pp->retprobe)
1817 err = strbuf_addstr(&buf, "%return");
1825 tmp = strchr(pp->file + len - 30, '/');
1826 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1828 err = strbuf_addf(&buf, "@%s", tmp);
1829 if (!err && !pp->function && pp->line)
1830 err = strbuf_addf(&buf, ":%d", pp->line);
1833 ret = strbuf_detach(&buf, NULL);
1835 strbuf_release(&buf);
1839 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1842 char *tmp, *ret = NULL;
1845 if (strbuf_init(&buf, 64))
1848 if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP,
1852 tmp = synthesize_perf_probe_point(&pev->point);
1853 if (!tmp || strbuf_addstr(&buf, tmp) < 0)
1857 for (i = 0; i < pev->nargs; i++) {
1858 tmp = synthesize_perf_probe_arg(pev->args + i);
1859 if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0)
1864 ret = strbuf_detach(&buf, NULL);
1866 strbuf_release(&buf);
1870 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1871 struct strbuf *buf, int depth)
1875 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1880 err = strbuf_addf(buf, "%+ld(", ref->offset);
1881 return (err < 0) ? err : depth;
1884 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1887 struct probe_trace_arg_ref *ref = arg->ref;
1890 /* Argument name or separator */
1892 err = strbuf_addf(buf, " %s=", arg->name);
1894 err = strbuf_addch(buf, ' ');
1898 /* Special case: @XXX */
1899 if (arg->value[0] == '@' && arg->ref)
1902 /* Dereferencing arguments */
1904 depth = __synthesize_probe_trace_arg_ref(ref, buf, 1);
1909 /* Print argument value */
1910 if (arg->value[0] == '@' && arg->ref)
1911 err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset);
1913 err = strbuf_addstr(buf, arg->value);
1916 while (!err && depth--)
1917 err = strbuf_addch(buf, ')');
1919 /* Print argument type */
1920 if (!err && arg->type)
1921 err = strbuf_addf(buf, ":%s", arg->type);
1926 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
1928 struct probe_trace_point *tp = &tev->point;
1933 /* Uprobes must have tp->module */
1934 if (tev->uprobes && !tp->module)
1937 if (strbuf_init(&buf, 32) < 0)
1940 if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
1941 tev->group, tev->event) < 0)
1944 * If tp->address == 0, then this point must be a
1945 * absolute address uprobe.
1946 * try_to_find_absolute_address() should have made
1947 * tp->symbol to "0x0".
1949 if (tev->uprobes && !tp->address) {
1950 if (!tp->symbol || strcmp(tp->symbol, "0x0"))
1954 /* Use the tp->address for uprobes */
1956 err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address);
1957 else if (!strncmp(tp->symbol, "0x", 2))
1958 /* Absolute address. See try_to_find_absolute_address() */
1959 err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "",
1960 tp->module ? ":" : "", tp->address);
1962 err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "",
1963 tp->module ? ":" : "", tp->symbol, tp->offset);
1967 for (i = 0; i < tev->nargs; i++)
1968 if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0)
1971 ret = strbuf_detach(&buf, NULL);
1973 strbuf_release(&buf);
1977 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
1978 struct perf_probe_point *pp,
1981 struct symbol *sym = NULL;
1983 u64 addr = tp->address;
1987 map = dso__new_map(tp->module);
1990 sym = map__find_symbol(map, addr, NULL);
1992 if (tp->symbol && !addr) {
1993 if (kernel_get_symbol_address_by_name(tp->symbol,
1994 &addr, true, false) < 0)
1999 sym = __find_kernel_function(addr, &map);
2006 pp->retprobe = tp->retprobe;
2007 pp->offset = addr - map->unmap_ip(map, sym->start);
2008 pp->function = strdup(sym->name);
2009 ret = pp->function ? 0 : -ENOMEM;
2012 if (map && !is_kprobe) {
2019 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
2020 struct perf_probe_point *pp,
2026 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
2029 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
2033 pr_debug("Failed to find probe point from both of dwarf and map.\n");
2036 pp->function = strdup(tp->symbol);
2037 pp->offset = tp->offset;
2039 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
2042 pp->function = strdup(buf);
2045 if (pp->function == NULL)
2048 pp->retprobe = tp->retprobe;
2053 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
2054 struct perf_probe_event *pev, bool is_kprobe)
2056 struct strbuf buf = STRBUF_INIT;
2059 /* Convert event/group name */
2060 pev->event = strdup(tev->event);
2061 pev->group = strdup(tev->group);
2062 if (pev->event == NULL || pev->group == NULL)
2065 /* Convert trace_point to probe_point */
2066 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
2070 /* Convert trace_arg to probe_arg */
2071 pev->nargs = tev->nargs;
2072 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
2073 if (pev->args == NULL)
2075 for (i = 0; i < tev->nargs && ret >= 0; i++) {
2076 if (tev->args[i].name)
2077 pev->args[i].name = strdup(tev->args[i].name);
2079 if ((ret = strbuf_init(&buf, 32)) < 0)
2081 ret = synthesize_probe_trace_arg(&tev->args[i], &buf);
2082 pev->args[i].name = strbuf_detach(&buf, NULL);
2084 if (pev->args[i].name == NULL && ret >= 0)
2089 clear_perf_probe_event(pev);
2094 void clear_perf_probe_event(struct perf_probe_event *pev)
2096 struct perf_probe_arg_field *field, *next;
2102 clear_perf_probe_point(&pev->point);
2104 for (i = 0; i < pev->nargs; i++) {
2105 free(pev->args[i].name);
2106 free(pev->args[i].var);
2107 free(pev->args[i].type);
2108 field = pev->args[i].field;
2111 zfree(&field->name);
2117 memset(pev, 0, sizeof(*pev));
2120 #define strdup_or_goto(str, label) \
2121 ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; })
2123 static int perf_probe_point__copy(struct perf_probe_point *dst,
2124 struct perf_probe_point *src)
2126 dst->file = strdup_or_goto(src->file, out_err);
2127 dst->function = strdup_or_goto(src->function, out_err);
2128 dst->lazy_line = strdup_or_goto(src->lazy_line, out_err);
2129 dst->line = src->line;
2130 dst->retprobe = src->retprobe;
2131 dst->offset = src->offset;
2135 clear_perf_probe_point(dst);
2139 static int perf_probe_arg__copy(struct perf_probe_arg *dst,
2140 struct perf_probe_arg *src)
2142 struct perf_probe_arg_field *field, **ppfield;
2144 dst->name = strdup_or_goto(src->name, out_err);
2145 dst->var = strdup_or_goto(src->var, out_err);
2146 dst->type = strdup_or_goto(src->type, out_err);
2149 ppfield = &(dst->field);
2151 *ppfield = zalloc(sizeof(*field));
2154 (*ppfield)->name = strdup_or_goto(field->name, out_err);
2155 (*ppfield)->index = field->index;
2156 (*ppfield)->ref = field->ref;
2157 field = field->next;
2158 ppfield = &((*ppfield)->next);
2165 int perf_probe_event__copy(struct perf_probe_event *dst,
2166 struct perf_probe_event *src)
2170 dst->event = strdup_or_goto(src->event, out_err);
2171 dst->group = strdup_or_goto(src->group, out_err);
2172 dst->target = strdup_or_goto(src->target, out_err);
2173 dst->uprobes = src->uprobes;
2175 if (perf_probe_point__copy(&dst->point, &src->point) < 0)
2178 dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs);
2181 dst->nargs = src->nargs;
2183 for (i = 0; i < src->nargs; i++)
2184 if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0)
2189 clear_perf_probe_event(dst);
2193 void clear_probe_trace_event(struct probe_trace_event *tev)
2195 struct probe_trace_arg_ref *ref, *next;
2200 free(tev->point.symbol);
2201 free(tev->point.realname);
2202 free(tev->point.module);
2203 for (i = 0; i < tev->nargs; i++) {
2204 free(tev->args[i].name);
2205 free(tev->args[i].value);
2206 free(tev->args[i].type);
2207 ref = tev->args[i].ref;
2215 memset(tev, 0, sizeof(*tev));
2218 struct kprobe_blacklist_node {
2219 struct list_head list;
2220 unsigned long start;
2225 static void kprobe_blacklist__delete(struct list_head *blacklist)
2227 struct kprobe_blacklist_node *node;
2229 while (!list_empty(blacklist)) {
2230 node = list_first_entry(blacklist,
2231 struct kprobe_blacklist_node, list);
2232 list_del(&node->list);
2238 static int kprobe_blacklist__load(struct list_head *blacklist)
2240 struct kprobe_blacklist_node *node;
2241 const char *__debugfs = debugfs__mountpoint();
2242 char buf[PATH_MAX], *p;
2246 if (__debugfs == NULL)
2249 ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs);
2253 fp = fopen(buf, "r");
2258 while (fgets(buf, PATH_MAX, fp)) {
2259 node = zalloc(sizeof(*node));
2264 INIT_LIST_HEAD(&node->list);
2265 list_add_tail(&node->list, blacklist);
2266 if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) {
2270 p = strchr(buf, '\t');
2273 if (p[strlen(p) - 1] == '\n')
2274 p[strlen(p) - 1] = '\0';
2276 p = (char *)"unknown";
2277 node->symbol = strdup(p);
2278 if (!node->symbol) {
2282 pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n",
2283 node->start, node->end, node->symbol);
2287 kprobe_blacklist__delete(blacklist);
2293 static struct kprobe_blacklist_node *
2294 kprobe_blacklist__find_by_address(struct list_head *blacklist,
2295 unsigned long address)
2297 struct kprobe_blacklist_node *node;
2299 list_for_each_entry(node, blacklist, list) {
2300 if (node->start <= address && address <= node->end)
2307 static LIST_HEAD(kprobe_blacklist);
2309 static void kprobe_blacklist__init(void)
2311 if (!list_empty(&kprobe_blacklist))
2314 if (kprobe_blacklist__load(&kprobe_blacklist) < 0)
2315 pr_debug("No kprobe blacklist support, ignored\n");
2318 static void kprobe_blacklist__release(void)
2320 kprobe_blacklist__delete(&kprobe_blacklist);
2323 static bool kprobe_blacklist__listed(unsigned long address)
2325 return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address);
2328 static int perf_probe_event__sprintf(const char *group, const char *event,
2329 struct perf_probe_event *pev,
2331 struct strbuf *result)
2336 if (asprintf(&buf, "%s:%s", group, event) < 0)
2338 ret = strbuf_addf(result, " %-20s (on ", buf);
2343 /* Synthesize only event probe point */
2344 buf = synthesize_perf_probe_point(&pev->point);
2347 ret = strbuf_addstr(result, buf);
2351 ret = strbuf_addf(result, " in %s", module);
2353 if (!ret && pev->nargs > 0) {
2354 ret = strbuf_add(result, " with", 5);
2355 for (i = 0; !ret && i < pev->nargs; i++) {
2356 buf = synthesize_perf_probe_arg(&pev->args[i]);
2359 ret = strbuf_addf(result, " %s", buf);
2364 ret = strbuf_addch(result, ')');
2370 int show_perf_probe_event(const char *group, const char *event,
2371 struct perf_probe_event *pev,
2372 const char *module, bool use_stdout)
2374 struct strbuf buf = STRBUF_INIT;
2377 ret = perf_probe_event__sprintf(group, event, pev, module, &buf);
2380 printf("%s\n", buf.buf);
2382 pr_info("%s\n", buf.buf);
2384 strbuf_release(&buf);
2389 static bool filter_probe_trace_event(struct probe_trace_event *tev,
2390 struct strfilter *filter)
2394 /* At first, check the event name itself */
2395 if (strfilter__compare(filter, tev->event))
2398 /* Next, check the combination of name and group */
2399 if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0)
2401 return strfilter__compare(filter, tmp);
2404 static int __show_perf_probe_events(int fd, bool is_kprobe,
2405 struct strfilter *filter)
2408 struct probe_trace_event tev;
2409 struct perf_probe_event pev;
2410 struct strlist *rawlist;
2411 struct str_node *ent;
2413 memset(&tev, 0, sizeof(tev));
2414 memset(&pev, 0, sizeof(pev));
2416 rawlist = probe_file__get_rawlist(fd);
2420 strlist__for_each_entry(ent, rawlist) {
2421 ret = parse_probe_trace_command(ent->s, &tev);
2423 if (!filter_probe_trace_event(&tev, filter))
2425 ret = convert_to_perf_probe_event(&tev, &pev,
2429 ret = show_perf_probe_event(pev.group, pev.event,
2430 &pev, tev.point.module,
2434 clear_perf_probe_event(&pev);
2435 clear_probe_trace_event(&tev);
2439 strlist__delete(rawlist);
2440 /* Cleanup cached debuginfo if needed */
2441 debuginfo_cache__exit();
2446 /* List up current perf-probe events */
2447 int show_perf_probe_events(struct strfilter *filter)
2449 int kp_fd, up_fd, ret;
2453 if (probe_conf.cache)
2454 return probe_cache__show_all_caches(filter);
2456 ret = init_probe_symbol_maps(false);
2460 ret = probe_file__open_both(&kp_fd, &up_fd, 0);
2465 ret = __show_perf_probe_events(kp_fd, true, filter);
2466 if (up_fd >= 0 && ret >= 0)
2467 ret = __show_perf_probe_events(up_fd, false, filter);
2472 exit_probe_symbol_maps();
2477 static int get_new_event_name(char *buf, size_t len, const char *base,
2478 struct strlist *namelist, bool allow_suffix)
2485 nbase = strdup(base);
2489 /* Cut off the dot suffixes (e.g. .const, .isra)*/
2490 p = strchr(nbase, '.');
2491 if (p && p != nbase)
2494 /* Try no suffix number */
2495 ret = e_snprintf(buf, len, "%s", nbase);
2497 pr_debug("snprintf() failed: %d\n", ret);
2500 if (!strlist__has_entry(namelist, buf))
2503 if (!allow_suffix) {
2504 pr_warning("Error: event \"%s\" already exists.\n"
2505 " Hint: Remove existing event by 'perf probe -d'\n"
2506 " or force duplicates by 'perf probe -f'\n"
2507 " or set 'force=yes' in BPF source.\n",
2513 /* Try to add suffix */
2514 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2515 ret = e_snprintf(buf, len, "%s_%d", nbase, i);
2517 pr_debug("snprintf() failed: %d\n", ret);
2520 if (!strlist__has_entry(namelist, buf))
2523 if (i == MAX_EVENT_INDEX) {
2524 pr_warning("Too many events are on the same function.\n");
2533 /* Warn if the current kernel's uprobe implementation is old */
2534 static void warn_uprobe_event_compat(struct probe_trace_event *tev)
2537 char *buf = synthesize_probe_trace_command(tev);
2539 /* Old uprobe event doesn't support memory dereference */
2540 if (!tev->uprobes || tev->nargs == 0 || !buf)
2543 for (i = 0; i < tev->nargs; i++)
2544 if (strglobmatch(tev->args[i].value, "[$@+-]*")) {
2545 pr_warning("Please upgrade your kernel to at least "
2546 "3.14 to have access to feature %s\n",
2547 tev->args[i].value);
2554 /* Set new name from original perf_probe_event and namelist */
2555 static int probe_trace_event__set_name(struct probe_trace_event *tev,
2556 struct perf_probe_event *pev,
2557 struct strlist *namelist,
2560 const char *event, *group;
2564 /* If probe_event or trace_event already have the name, reuse it */
2565 if (pev->event && !pev->sdt)
2567 else if (tev->event)
2570 /* Or generate new one from probe point */
2571 if (pev->point.function &&
2572 (strncmp(pev->point.function, "0x", 2) != 0) &&
2573 !strisglob(pev->point.function))
2574 event = pev->point.function;
2576 event = tev->point.realname;
2578 if (pev->group && !pev->sdt)
2580 else if (tev->group)
2583 group = PERFPROBE_GROUP;
2585 /* Get an unused new event name */
2586 ret = get_new_event_name(buf, 64, event,
2587 namelist, allow_suffix);
2593 tev->event = strdup(event);
2594 tev->group = strdup(group);
2595 if (tev->event == NULL || tev->group == NULL)
2598 /* Add added event name to namelist */
2599 strlist__add(namelist, event);
2603 static int __open_probe_file_and_namelist(bool uprobe,
2604 struct strlist **namelist)
2608 fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0));
2612 /* Get current event names */
2613 *namelist = probe_file__get_namelist(fd);
2615 pr_debug("Failed to get current event list.\n");
2622 static int __add_probe_trace_events(struct perf_probe_event *pev,
2623 struct probe_trace_event *tevs,
2624 int ntevs, bool allow_suffix)
2626 int i, fd[2] = {-1, -1}, up, ret;
2627 struct probe_trace_event *tev = NULL;
2628 struct probe_cache *cache = NULL;
2629 struct strlist *namelist[2] = {NULL, NULL};
2631 up = pev->uprobes ? 1 : 0;
2632 fd[up] = __open_probe_file_and_namelist(up, &namelist[up]);
2637 for (i = 0; i < ntevs; i++) {
2639 up = tev->uprobes ? 1 : 0;
2640 if (fd[up] == -1) { /* Open the kprobe/uprobe_events */
2641 fd[up] = __open_probe_file_and_namelist(up,
2646 /* Skip if the symbol is out of .text or blacklisted */
2647 if (!tev->point.symbol && !pev->uprobes)
2650 /* Set new name for tev (and update namelist) */
2651 ret = probe_trace_event__set_name(tev, pev, namelist[up],
2656 ret = probe_file__add_event(fd[up], tev);
2661 * Probes after the first probe which comes from same
2662 * user input are always allowed to add suffix, because
2663 * there might be several addresses corresponding to
2666 allow_suffix = true;
2668 if (ret == -EINVAL && pev->uprobes)
2669 warn_uprobe_event_compat(tev);
2670 if (ret == 0 && probe_conf.cache) {
2671 cache = probe_cache__new(pev->target);
2673 probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 ||
2674 probe_cache__commit(cache) < 0)
2675 pr_warning("Failed to add event to probe cache\n");
2676 probe_cache__delete(cache);
2680 for (up = 0; up < 2; up++) {
2681 strlist__delete(namelist[up]);
2688 static int find_probe_functions(struct map *map, char *name,
2689 struct symbol **syms)
2693 struct rb_node *tmp;
2695 if (map__load(map, NULL) < 0)
2698 map__for_each_symbol(map, sym, tmp) {
2699 if (strglobmatch(sym->name, name)) {
2701 if (syms && found < probe_conf.max_probes)
2702 syms[found - 1] = sym;
2709 void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused,
2710 struct probe_trace_event *tev __maybe_unused,
2711 struct map *map __maybe_unused,
2712 struct symbol *sym __maybe_unused) { }
2715 * Find probe function addresses from map.
2716 * Return an error or the number of found probe_trace_event
2718 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2719 struct probe_trace_event **tevs)
2721 struct map *map = NULL;
2722 struct ref_reloc_sym *reloc_sym = NULL;
2724 struct symbol **syms = NULL;
2725 struct probe_trace_event *tev;
2726 struct perf_probe_point *pp = &pev->point;
2727 struct probe_trace_point *tp;
2728 int num_matched_functions;
2729 int ret, i, j, skipped = 0;
2732 map = get_target_map(pev->target, pev->uprobes);
2738 syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes);
2745 * Load matched symbols: Since the different local symbols may have
2746 * same name but different addresses, this lists all the symbols.
2748 num_matched_functions = find_probe_functions(map, pp->function, syms);
2749 if (num_matched_functions == 0) {
2750 pr_err("Failed to find symbol %s in %s\n", pp->function,
2751 pev->target ? : "kernel");
2754 } else if (num_matched_functions > probe_conf.max_probes) {
2755 pr_err("Too many functions matched in %s\n",
2756 pev->target ? : "kernel");
2761 /* Note that the symbols in the kmodule are not relocated */
2762 if (!pev->uprobes && !pp->retprobe && !pev->target) {
2763 reloc_sym = kernel_get_ref_reloc_sym();
2765 pr_warning("Relocated base symbol is not found!\n");
2771 /* Setup result trace-probe-events */
2772 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2780 for (j = 0; j < num_matched_functions; j++) {
2783 tev = (*tevs) + ret;
2785 if (ret == num_matched_functions) {
2786 pr_warning("Too many symbols are listed. Skip it.\n");
2791 if (pp->offset > sym->end - sym->start) {
2792 pr_warning("Offset %ld is bigger than the size of %s\n",
2793 pp->offset, sym->name);
2797 /* Add one probe point */
2798 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2800 /* Check the kprobe (not in module) is within .text */
2801 if (!pev->uprobes && !pev->target &&
2802 kprobe_warn_out_range(sym->name, tp->address)) {
2803 tp->symbol = NULL; /* Skip it */
2805 } else if (reloc_sym) {
2806 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2807 tp->offset = tp->address - reloc_sym->addr;
2809 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2810 tp->offset = pp->offset;
2812 tp->realname = strdup_or_goto(sym->name, nomem_out);
2814 tp->retprobe = pp->retprobe;
2817 tev->point.module = strdup_or_goto(pev->target,
2820 mod_name = find_module_name(pev->target);
2822 strdup(mod_name ? mod_name : pev->target);
2824 if (!tev->point.module)
2828 tev->uprobes = pev->uprobes;
2829 tev->nargs = pev->nargs;
2831 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2833 if (tev->args == NULL)
2836 for (i = 0; i < tev->nargs; i++) {
2837 if (pev->args[i].name)
2839 strdup_or_goto(pev->args[i].name,
2842 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2844 if (pev->args[i].type)
2846 strdup_or_goto(pev->args[i].type,
2849 arch__fix_tev_from_maps(pev, tev, map, sym);
2851 if (ret == skipped) {
2857 put_target_map(map, pev->uprobes);
2864 clear_probe_trace_events(*tevs, num_matched_functions);
2869 static int try_to_find_absolute_address(struct perf_probe_event *pev,
2870 struct probe_trace_event **tevs)
2872 struct perf_probe_point *pp = &pev->point;
2873 struct probe_trace_event *tev;
2874 struct probe_trace_point *tp;
2877 if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2)))
2879 if (perf_probe_event_need_dwarf(pev))
2883 * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at
2886 * Only one tev can be generated by this.
2888 *tevs = zalloc(sizeof(*tev));
2896 * Don't use tp->offset, use address directly, because
2897 * in synthesize_probe_trace_command() address cannot be
2900 tp->address = pev->point.abs_address;
2901 tp->retprobe = pp->retprobe;
2902 tev->uprobes = pev->uprobes;
2906 * Give it a '0x' leading symbol name.
2907 * In __add_probe_trace_events, a NULL symbol is interpreted as
2910 if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0)
2913 /* For kprobe, check range */
2914 if ((!tev->uprobes) &&
2915 (kprobe_warn_out_range(tev->point.symbol,
2916 tev->point.address))) {
2921 if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0)
2925 tp->module = strdup(pev->target);
2931 tev->group = strdup(pev->group);
2937 tev->event = strdup(pev->event);
2942 tev->nargs = pev->nargs;
2943 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
2948 for (i = 0; i < tev->nargs; i++)
2949 copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]);
2955 clear_probe_trace_events(*tevs, 1);
2961 /* Concatinate two arrays */
2962 static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b)
2966 ret = malloc(sz_a + sz_b);
2968 memcpy(ret, a, sz_a);
2969 memcpy(ret + sz_a, b, sz_b);
2975 concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs,
2976 struct probe_trace_event **tevs2, int ntevs2)
2978 struct probe_trace_event *new_tevs;
2988 if (*ntevs + ntevs2 > probe_conf.max_probes)
2991 /* Concatinate the array of probe_trace_event */
2992 new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs),
2993 *tevs2, ntevs2 * sizeof(**tevs2));
3003 clear_probe_trace_events(*tevs2, ntevs2);
3010 * Try to find probe_trace_event from given probe caches. Return the number
3011 * of cached events found, if an error occurs return the error.
3013 static int find_cached_events(struct perf_probe_event *pev,
3014 struct probe_trace_event **tevs,
3017 struct probe_cache *cache;
3018 struct probe_cache_entry *entry;
3019 struct probe_trace_event *tmp_tevs = NULL;
3023 cache = probe_cache__new(target);
3024 /* Return 0 ("not found") if the target has no probe cache. */
3028 for_each_probe_cache_entry(entry, cache) {
3029 /* Skip the cache entry which has no name */
3030 if (!entry->pev.event || !entry->pev.group)
3032 if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) &&
3033 strglobmatch(entry->pev.event, pev->event)) {
3034 ret = probe_cache_entry__get_event(entry, &tmp_tevs);
3036 ret = concat_probe_trace_events(tevs, &ntevs,
3042 probe_cache__delete(cache);
3044 clear_probe_trace_events(*tevs, ntevs);
3048 if (ntevs > 0 && target && target[0] == '/')
3049 pev->uprobes = true;
3055 /* Try to find probe_trace_event from all probe caches */
3056 static int find_cached_events_all(struct perf_probe_event *pev,
3057 struct probe_trace_event **tevs)
3059 struct probe_trace_event *tmp_tevs = NULL;
3060 struct strlist *bidlist;
3061 struct str_node *nd;
3066 /* Get the buildid list of all valid caches */
3067 bidlist = build_id_cache__list_all(true);
3070 pr_debug("Failed to get buildids: %d\n", ret);
3075 strlist__for_each_entry(nd, bidlist) {
3076 pathname = build_id_cache__origname(nd->s);
3077 ret = find_cached_events(pev, &tmp_tevs, pathname);
3078 /* In the case of cnt == 0, we just skip it */
3080 ret = concat_probe_trace_events(tevs, &ntevs,
3086 strlist__delete(bidlist);
3089 clear_probe_trace_events(*tevs, ntevs);
3097 static int find_probe_trace_events_from_cache(struct perf_probe_event *pev,
3098 struct probe_trace_event **tevs)
3100 struct probe_cache *cache;
3101 struct probe_cache_entry *entry;
3102 struct probe_trace_event *tev;
3103 struct str_node *node;
3107 /* For SDT/cached events, we use special search functions */
3109 return find_cached_events_all(pev, tevs);
3111 return find_cached_events(pev, tevs, pev->target);
3113 cache = probe_cache__new(pev->target);
3117 entry = probe_cache__find(cache, pev);
3119 /* SDT must be in the cache */
3120 ret = pev->sdt ? -ENOENT : 0;
3124 ret = strlist__nr_entries(entry->tevlist);
3125 if (ret > probe_conf.max_probes) {
3126 pr_debug("Too many entries matched in the cache of %s\n",
3127 pev->target ? : "kernel");
3132 *tevs = zalloc(ret * sizeof(*tev));
3139 strlist__for_each_entry(node, entry->tevlist) {
3140 tev = &(*tevs)[i++];
3141 ret = parse_probe_trace_command(node->s, tev);
3144 /* Set the uprobes attribute as same as original */
3145 tev->uprobes = pev->uprobes;
3150 probe_cache__delete(cache);
3154 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
3155 struct probe_trace_event **tevs)
3159 if (!pev->group && !pev->sdt) {
3160 /* Set group name if not given */
3161 if (!pev->uprobes) {
3162 pev->group = strdup(PERFPROBE_GROUP);
3163 ret = pev->group ? 0 : -ENOMEM;
3165 ret = convert_exec_to_group(pev->target, &pev->group);
3167 pr_warning("Failed to make a group name.\n");
3172 ret = try_to_find_absolute_address(pev, tevs);
3176 /* At first, we need to lookup cache entry */
3177 ret = find_probe_trace_events_from_cache(pev, tevs);
3178 if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */
3179 return ret == 0 ? -ENOENT : ret; /* Found in probe cache */
3181 /* Convert perf_probe_event with debuginfo */
3182 ret = try_to_find_probe_trace_events(pev, tevs);
3184 return ret; /* Found in debuginfo or got an error */
3186 return find_probe_trace_events_from_map(pev, tevs);
3189 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3193 /* Loop 1: convert all events */
3194 for (i = 0; i < npevs; i++) {
3195 /* Init kprobe blacklist if needed */
3196 if (!pevs[i].uprobes)
3197 kprobe_blacklist__init();
3198 /* Convert with or without debuginfo */
3199 ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs);
3202 pevs[i].ntevs = ret;
3204 /* This just release blacklist only if allocated */
3205 kprobe_blacklist__release();
3210 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3214 /* Loop 2: add all events */
3215 for (i = 0; i < npevs; i++) {
3216 ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs,
3218 probe_conf.force_add);
3225 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3229 /* Loop 3: cleanup and free trace events */
3230 for (i = 0; i < npevs; i++) {
3231 for (j = 0; j < pevs[i].ntevs; j++)
3232 clear_probe_trace_event(&pevs[i].tevs[j]);
3233 zfree(&pevs[i].tevs);
3235 clear_perf_probe_event(&pevs[i]);
3239 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3243 ret = init_probe_symbol_maps(pevs->uprobes);
3247 ret = convert_perf_probe_events(pevs, npevs);
3249 ret = apply_perf_probe_events(pevs, npevs);
3251 cleanup_perf_probe_events(pevs, npevs);
3253 exit_probe_symbol_maps();
3257 int del_perf_probe_events(struct strfilter *filter)
3259 int ret, ret2, ufd = -1, kfd = -1;
3260 char *str = strfilter__string(filter);
3265 /* Get current event names */
3266 ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
3270 ret = probe_file__del_events(kfd, filter);
3271 if (ret < 0 && ret != -ENOENT)
3274 ret2 = probe_file__del_events(ufd, filter);
3275 if (ret2 < 0 && ret2 != -ENOENT) {
3292 /* TODO: don't use a global variable for filter ... */
3293 static struct strfilter *available_func_filter;
3296 * If a symbol corresponds to a function with global binding and
3297 * matches filter return 0. For all others return 1.
3299 static int filter_available_functions(struct map *map __maybe_unused,
3302 if (strfilter__compare(available_func_filter, sym->name))
3307 int show_available_funcs(const char *target, struct strfilter *_filter,
3313 ret = init_probe_symbol_maps(user);
3317 /* Get a symbol map */
3319 map = dso__new_map(target);
3321 map = kernel_get_module_map(target);
3323 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
3327 /* Load symbols with given filter */
3328 available_func_filter = _filter;
3329 ret = map__load(map, filter_available_functions);
3332 char *str = strfilter__string(_filter);
3333 pr_err("Failed to find symbols matched to \"%s\"\n",
3337 pr_err("Failed to load symbols in %s\n",
3338 (target) ? : "kernel");
3341 if (!dso__sorted_by_name(map->dso, map->type))
3342 dso__sort_by_name(map->dso, map->type);
3344 /* Show all (filtered) symbols */
3346 dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
3351 exit_probe_symbol_maps();
3356 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
3357 struct perf_probe_arg *pvar)
3359 tvar->value = strdup(pvar->var);
3360 if (tvar->value == NULL)
3363 tvar->type = strdup(pvar->type);
3364 if (tvar->type == NULL)
3368 tvar->name = strdup(pvar->name);
3369 if (tvar->name == NULL)