2 * probe-event.c : perf-probe definition to probe_events format converter
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);
116 static struct symbol *__find_kernel_function(u64 addr, struct map **mapp)
118 return machine__find_kernel_function(host_machine, addr, mapp);
121 static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void)
123 /* kmap->ref_reloc_sym should be set if host_machine is initialized */
125 struct map *map = machine__kernel_map(host_machine);
127 if (map__load(map) < 0)
130 kmap = map__kmap(map);
133 return kmap->ref_reloc_sym;
136 static int kernel_get_symbol_address_by_name(const char *name, u64 *addr,
137 bool reloc, bool reladdr)
139 struct ref_reloc_sym *reloc_sym;
143 /* ref_reloc_sym is just a label. Need a special fix*/
144 reloc_sym = kernel_get_ref_reloc_sym();
145 if (reloc_sym && strcmp(name, reloc_sym->name) == 0)
146 *addr = (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr;
148 sym = __find_kernel_function_by_name(name, &map);
151 *addr = map->unmap_ip(map, sym->start) -
152 ((reloc) ? 0 : map->reloc) -
153 ((reladdr) ? map->start : 0);
158 static struct map *kernel_get_module_map(const char *module)
160 struct map_groups *grp = &host_machine->kmaps;
161 struct maps *maps = &grp->maps[MAP__FUNCTION];
164 /* A file path -- this is an offline module */
165 if (module && strchr(module, '/'))
166 return dso__new_map(module);
171 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
172 /* short_name is "[module]" */
173 if (strncmp(pos->dso->short_name + 1, module,
174 pos->dso->short_name_len - 2) == 0 &&
175 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 int convert_exec_to_group(const char *exec, char **result)
194 char *ptr1, *ptr2, *exec_copy;
198 exec_copy = strdup(exec);
202 ptr1 = basename(exec_copy);
208 for (ptr2 = ptr1; *ptr2 != '\0'; ptr2++) {
209 if (!isalnum(*ptr2) && *ptr2 != '_') {
215 ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1);
219 *result = strdup(buf);
220 ret = *result ? 0 : -ENOMEM;
227 static void clear_perf_probe_point(struct perf_probe_point *pp)
234 static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs)
238 for (i = 0; i < ntevs; i++)
239 clear_probe_trace_event(tevs + i);
242 static bool kprobe_blacklist__listed(unsigned long address);
243 static bool kprobe_warn_out_range(const char *symbol, unsigned long address)
248 /* Get the address of _etext for checking non-probable text symbol */
249 ret = kernel_get_symbol_address_by_name("_etext", &etext_addr,
252 if (ret == 0 && etext_addr < address)
253 pr_warning("%s is out of .text, skip it.\n", symbol);
254 else if (kprobe_blacklist__listed(address))
255 pr_warning("%s is blacklisted function, skip it.\n", symbol);
263 * @module can be module name of module file path. In case of path,
264 * inspect elf and find out what is actual module name.
265 * Caller has to free mod_name after using it.
267 static char *find_module_name(const char *module)
275 char *mod_name = NULL;
278 fd = open(module, O_RDONLY);
282 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
286 if (gelf_getehdr(elf, &ehdr) == NULL)
289 sec = elf_section_by_name(elf, &ehdr, &shdr,
290 ".gnu.linkonce.this_module", NULL);
294 data = elf_getdata(sec, NULL);
295 if (!data || !data->d_buf)
300 * '.gnu.linkonce.this_module' section of kernel module elf directly
301 * maps to 'struct module' from linux/module.h. This section contains
302 * actual module name which will be used by kernel after loading it.
303 * But, we cannot use 'struct module' here since linux/module.h is not
304 * exposed to user-space. Offset of 'name' has remained same from long
305 * time, so hardcoding it here.
307 if (ehdr.e_ident[EI_CLASS] == ELFCLASS32)
309 else /* expect ELFCLASS64 by default */
312 mod_name = strdup((char *)data->d_buf + name_offset);
321 #ifdef HAVE_DWARF_SUPPORT
323 static int kernel_get_module_dso(const char *module, struct dso **pdso)
327 const char *vmlinux_name;
331 char module_name[128];
333 snprintf(module_name, sizeof(module_name), "[%s]", module);
334 map = map_groups__find_by_name(&host_machine->kmaps, MAP__FUNCTION, module_name);
339 pr_debug("Failed to find module %s.\n", module);
343 map = machine__kernel_map(host_machine);
346 vmlinux_name = symbol_conf.vmlinux_name;
349 ret = dso__load_vmlinux(dso, map, vmlinux_name, false);
351 ret = dso__load_vmlinux_path(dso, map);
358 * Some binaries like glibc have special symbols which are on the symbol
359 * table, but not in the debuginfo. If we can find the address of the
360 * symbol from map, we can translate the address back to the probe point.
362 static int find_alternative_probe_point(struct debuginfo *dinfo,
363 struct perf_probe_point *pp,
364 struct perf_probe_point *result,
365 const char *target, bool uprobes)
367 struct map *map = NULL;
372 /* This can work only for function-name based one */
373 if (!pp->function || pp->file)
376 map = get_target_map(target, uprobes);
380 /* Find the address of given function */
381 map__for_each_symbol_by_name(map, pp->function, sym) {
383 address = sym->start;
385 address = map->unmap_ip(map, sym->start) - map->reloc;
392 pr_debug("Symbol %s address found : %" PRIx64 "\n",
393 pp->function, address);
395 ret = debuginfo__find_probe_point(dinfo, (unsigned long)address,
398 ret = (!ret) ? -ENOENT : ret;
400 result->offset += pp->offset;
401 result->line += pp->line;
402 result->retprobe = pp->retprobe;
412 static int get_alternative_probe_event(struct debuginfo *dinfo,
413 struct perf_probe_event *pev,
414 struct perf_probe_point *tmp)
418 memcpy(tmp, &pev->point, sizeof(*tmp));
419 memset(&pev->point, 0, sizeof(pev->point));
420 ret = find_alternative_probe_point(dinfo, tmp, &pev->point,
421 pev->target, pev->uprobes);
423 memcpy(&pev->point, tmp, sizeof(*tmp));
428 static int get_alternative_line_range(struct debuginfo *dinfo,
429 struct line_range *lr,
430 const char *target, bool user)
432 struct perf_probe_point pp = { .function = lr->function,
435 struct perf_probe_point result;
438 memset(&result, 0, sizeof(result));
440 if (lr->end != INT_MAX)
441 len = lr->end - lr->start;
442 ret = find_alternative_probe_point(dinfo, &pp, &result,
445 lr->function = result.function;
446 lr->file = result.file;
447 lr->start = result.line;
448 if (lr->end != INT_MAX)
449 lr->end = lr->start + len;
450 clear_perf_probe_point(&pp);
455 /* Open new debuginfo of given module */
456 static struct debuginfo *open_debuginfo(const char *module, bool silent)
458 const char *path = module;
459 char reason[STRERR_BUFSIZE];
460 struct debuginfo *ret = NULL;
461 struct dso *dso = NULL;
464 if (!module || !strchr(module, '/')) {
465 err = kernel_get_module_dso(module, &dso);
467 if (!dso || dso->load_errno == 0) {
468 if (!str_error_r(-err, reason, STRERR_BUFSIZE))
469 strcpy(reason, "(unknown)");
471 dso__strerror_load(dso, reason, STRERR_BUFSIZE);
473 pr_err("Failed to find the path for %s: %s\n",
474 module ?: "kernel", reason);
477 path = dso->long_name;
479 ret = debuginfo__new(path);
480 if (!ret && !silent) {
481 pr_warning("The %s file has no debug information.\n", path);
482 if (!module || !strtailcmp(path, ".ko"))
483 pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, ");
485 pr_warning("Rebuild with -g, ");
486 pr_warning("or install an appropriate debuginfo package.\n");
491 /* For caching the last debuginfo */
492 static struct debuginfo *debuginfo_cache;
493 static char *debuginfo_cache_path;
495 static struct debuginfo *debuginfo_cache__open(const char *module, bool silent)
497 const char *path = module;
499 /* If the module is NULL, it should be the kernel. */
503 if (debuginfo_cache_path && !strcmp(debuginfo_cache_path, path))
506 /* Copy module path */
507 free(debuginfo_cache_path);
508 debuginfo_cache_path = strdup(path);
509 if (!debuginfo_cache_path) {
510 debuginfo__delete(debuginfo_cache);
511 debuginfo_cache = NULL;
515 debuginfo_cache = open_debuginfo(module, silent);
516 if (!debuginfo_cache)
517 zfree(&debuginfo_cache_path);
519 return debuginfo_cache;
522 static void debuginfo_cache__exit(void)
524 debuginfo__delete(debuginfo_cache);
525 debuginfo_cache = NULL;
526 zfree(&debuginfo_cache_path);
530 static int get_text_start_address(const char *exec, unsigned long *address)
535 int fd, ret = -ENOENT;
537 fd = open(exec, O_RDONLY);
541 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
547 if (gelf_getehdr(elf, &ehdr) == NULL)
550 if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL))
553 *address = shdr.sh_addr - shdr.sh_offset;
564 * Convert trace point to probe point with debuginfo
566 static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
567 struct perf_probe_point *pp,
570 struct debuginfo *dinfo = NULL;
571 unsigned long stext = 0;
572 u64 addr = tp->address;
575 /* convert the address to dwarf address */
581 ret = get_text_start_address(tp->module, &stext);
585 } else if (tp->symbol) {
586 /* If the module is given, this returns relative address */
587 ret = kernel_get_symbol_address_by_name(tp->symbol, &addr,
588 false, !!tp->module);
594 pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
595 tp->module ? : "kernel");
597 dinfo = debuginfo_cache__open(tp->module, verbose <= 0);
599 ret = debuginfo__find_probe_point(dinfo,
600 (unsigned long)addr, pp);
605 pp->retprobe = tp->retprobe;
609 pr_debug("Failed to find corresponding probes from debuginfo.\n");
610 return ret ? : -ENOENT;
613 /* Adjust symbol name and address */
614 static int post_process_probe_trace_point(struct probe_trace_point *tp,
615 struct map *map, unsigned long offs)
618 u64 addr = tp->address + tp->offset - offs;
620 sym = map__find_symbol(map, addr);
624 if (strcmp(sym->name, tp->symbol)) {
625 /* If we have no realname, use symbol for it */
627 tp->realname = tp->symbol;
630 tp->symbol = strdup(sym->name);
634 tp->offset = addr - sym->start;
641 * Rename DWARF symbols to ELF symbols -- gcc sometimes optimizes functions
642 * and generate new symbols with suffixes such as .constprop.N or .isra.N
643 * etc. Since those symbols are not recorded in DWARF, we have to find
644 * correct generated symbols from offline ELF binary.
645 * For online kernel or uprobes we don't need this because those are
646 * rebased on _text, or already a section relative address.
649 post_process_offline_probe_trace_events(struct probe_trace_event *tevs,
650 int ntevs, const char *pathname)
653 unsigned long stext = 0;
656 /* Prepare a map for offline binary */
657 map = dso__new_map(pathname);
658 if (!map || get_text_start_address(pathname, &stext) < 0) {
659 pr_warning("Failed to get ELF symbols for %s\n", pathname);
663 for (i = 0; i < ntevs; i++) {
664 ret = post_process_probe_trace_point(&tevs[i].point,
674 static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
675 int ntevs, const char *exec)
678 unsigned long stext = 0;
683 ret = get_text_start_address(exec, &stext);
687 for (i = 0; i < ntevs && ret >= 0; i++) {
688 /* point.address is the addres of point.symbol + point.offset */
689 tevs[i].point.address -= stext;
690 tevs[i].point.module = strdup(exec);
691 if (!tevs[i].point.module) {
695 tevs[i].uprobes = true;
702 post_process_module_probe_trace_events(struct probe_trace_event *tevs,
703 int ntevs, const char *module,
704 struct debuginfo *dinfo)
706 Dwarf_Addr text_offs = 0;
708 char *mod_name = NULL;
714 map = get_target_map(module, false);
715 if (!map || debuginfo__get_text_offset(dinfo, &text_offs, true) < 0) {
716 pr_warning("Failed to get ELF symbols for %s\n", module);
720 mod_name = find_module_name(module);
721 for (i = 0; i < ntevs; i++) {
722 ret = post_process_probe_trace_point(&tevs[i].point,
723 map, (unsigned long)text_offs);
726 tevs[i].point.module =
727 strdup(mod_name ? mod_name : module);
728 if (!tevs[i].point.module) {
741 post_process_kernel_probe_trace_events(struct probe_trace_event *tevs,
744 struct ref_reloc_sym *reloc_sym;
748 /* Skip post process if the target is an offline kernel */
749 if (symbol_conf.ignore_vmlinux_buildid)
750 return post_process_offline_probe_trace_events(tevs, ntevs,
751 symbol_conf.vmlinux_name);
753 reloc_sym = kernel_get_ref_reloc_sym();
755 pr_warning("Relocated base symbol is not found!\n");
759 for (i = 0; i < ntevs; i++) {
760 if (!tevs[i].point.address || tevs[i].point.retprobe)
762 /* If we found a wrong one, mark it by NULL symbol */
763 if (kprobe_warn_out_range(tevs[i].point.symbol,
764 tevs[i].point.address)) {
768 tmp = strdup(reloc_sym->name);
772 /* If we have no realname, use symbol for it */
773 if (!tevs[i].point.realname)
774 tevs[i].point.realname = tevs[i].point.symbol;
776 free(tevs[i].point.symbol);
777 tevs[i].point.symbol = tmp;
778 tevs[i].point.offset = tevs[i].point.address -
779 reloc_sym->unrelocated_addr;
785 arch__post_process_probe_trace_events(struct perf_probe_event *pev __maybe_unused,
786 int ntevs __maybe_unused)
790 /* Post processing the probe events */
791 static int post_process_probe_trace_events(struct perf_probe_event *pev,
792 struct probe_trace_event *tevs,
793 int ntevs, const char *module,
794 bool uprobe, struct debuginfo *dinfo)
799 ret = add_exec_to_probe_trace_events(tevs, ntevs, module);
801 /* Currently ref_reloc_sym based probe is not for drivers */
802 ret = post_process_module_probe_trace_events(tevs, ntevs,
805 ret = post_process_kernel_probe_trace_events(tevs, ntevs);
808 arch__post_process_probe_trace_events(pev, ntevs);
813 /* Try to find perf_probe_event with debuginfo */
814 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
815 struct probe_trace_event **tevs)
817 bool need_dwarf = perf_probe_event_need_dwarf(pev);
818 struct perf_probe_point tmp;
819 struct debuginfo *dinfo;
822 dinfo = open_debuginfo(pev->target, !need_dwarf);
826 pr_debug("Could not open debuginfo. Try to use symbols.\n");
830 pr_debug("Try to find probe point from debuginfo.\n");
831 /* Searching trace events corresponding to a probe event */
832 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
834 if (ntevs == 0) { /* Not found, retry with an alternative */
835 ret = get_alternative_probe_event(dinfo, pev, &tmp);
837 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
839 * Write back to the original probe_event for
840 * setting appropriate (user given) event name
842 clear_perf_probe_point(&pev->point);
843 memcpy(&pev->point, &tmp, sizeof(tmp));
847 if (ntevs > 0) { /* Succeeded to find trace events */
848 pr_debug("Found %d probe_trace_events.\n", ntevs);
849 ret = post_process_probe_trace_events(pev, *tevs, ntevs,
850 pev->target, pev->uprobes, dinfo);
851 if (ret < 0 || ret == ntevs) {
852 pr_debug("Post processing failed or all events are skipped. (%d)\n", ret);
853 clear_probe_trace_events(*tevs, ntevs);
859 debuginfo__delete(dinfo);
861 if (ntevs == 0) { /* No error but failed to find probe point. */
862 pr_warning("Probe point '%s' not found.\n",
863 synthesize_perf_probe_point(&pev->point));
865 } else if (ntevs < 0) {
866 /* Error path : ntevs < 0 */
867 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
869 pr_warning("Warning: No dwarf info found in the vmlinux - "
870 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
872 pr_debug("Trying to use symbols.\n");
879 #define LINEBUF_SIZE 256
880 #define NR_ADDITIONAL_LINES 2
882 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
884 char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE];
885 const char *color = show_num ? "" : PERF_COLOR_BLUE;
886 const char *prefix = NULL;
889 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
894 prefix = show_num ? "%7d " : " ";
895 color_fprintf(stdout, color, prefix, l);
897 color_fprintf(stdout, color, "%s", buf);
899 } while (strchr(buf, '\n') == NULL);
904 pr_warning("File read error: %s\n",
905 str_error_r(errno, sbuf, sizeof(sbuf)));
911 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
913 int rv = __show_one_line(fp, l, skip, show_num);
915 pr_warning("Source file is shorter than expected.\n");
921 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
922 #define show_one_line(f,l) _show_one_line(f,l,false,false)
923 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
924 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
927 * Show line-range always requires debuginfo to find source file and
930 static int __show_line_range(struct line_range *lr, const char *module,
935 struct debuginfo *dinfo;
939 char sbuf[STRERR_BUFSIZE];
941 /* Search a line range */
942 dinfo = open_debuginfo(module, false);
946 ret = debuginfo__find_line_range(dinfo, lr);
947 if (!ret) { /* Not found, retry with an alternative */
948 ret = get_alternative_line_range(dinfo, lr, module, user);
950 ret = debuginfo__find_line_range(dinfo, lr);
952 debuginfo__delete(dinfo);
953 if (ret == 0 || ret == -ENOENT) {
954 pr_warning("Specified source line is not found.\n");
956 } else if (ret < 0) {
957 pr_warning("Debuginfo analysis failed.\n");
961 /* Convert source file path */
963 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
965 /* Free old path when new path is assigned */
970 pr_warning("Failed to find source file path.\n");
977 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
978 lr->start - lr->offset);
980 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
982 fp = fopen(lr->path, "r");
984 pr_warning("Failed to open %s: %s\n", lr->path,
985 str_error_r(errno, sbuf, sizeof(sbuf)));
988 /* Skip to starting line number */
989 while (l < lr->start) {
990 ret = skip_one_line(fp, l++);
995 intlist__for_each_entry(ln, lr->line_list) {
996 for (; ln->i > l; l++) {
997 ret = show_one_line(fp, l - lr->offset);
1001 ret = show_one_line_with_num(fp, l++ - lr->offset);
1006 if (lr->end == INT_MAX)
1007 lr->end = l + NR_ADDITIONAL_LINES;
1008 while (l <= lr->end) {
1009 ret = show_one_line_or_eof(fp, l++ - lr->offset);
1018 int show_line_range(struct line_range *lr, const char *module, bool user)
1022 ret = init_probe_symbol_maps(user);
1025 ret = __show_line_range(lr, module, user);
1026 exit_probe_symbol_maps();
1031 static int show_available_vars_at(struct debuginfo *dinfo,
1032 struct perf_probe_event *pev,
1033 struct strfilter *_filter)
1037 struct str_node *node;
1038 struct variable_list *vls = NULL, *vl;
1039 struct perf_probe_point tmp;
1042 buf = synthesize_perf_probe_point(&pev->point);
1045 pr_debug("Searching variables at %s\n", buf);
1047 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls);
1048 if (!ret) { /* Not found, retry with an alternative */
1049 ret = get_alternative_probe_event(dinfo, pev, &tmp);
1051 ret = debuginfo__find_available_vars_at(dinfo, pev,
1053 /* Release the old probe_point */
1054 clear_perf_probe_point(&tmp);
1058 if (ret == 0 || ret == -ENOENT) {
1059 pr_err("Failed to find the address of %s\n", buf);
1062 pr_warning("Debuginfo analysis failed.\n");
1066 /* Some variables are found */
1067 fprintf(stdout, "Available variables at %s\n", buf);
1068 for (i = 0; i < ret; i++) {
1071 * A probe point might be converted to
1072 * several trace points.
1074 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
1076 zfree(&vl->point.symbol);
1079 strlist__for_each_entry(node, vl->vars) {
1080 var = strchr(node->s, '\t') + 1;
1081 if (strfilter__compare(_filter, var)) {
1082 fprintf(stdout, "\t\t%s\n", node->s);
1086 strlist__delete(vl->vars);
1089 fprintf(stdout, "\t\t(No matched variables)\n");
1097 /* Show available variables on given probe point */
1098 int show_available_vars(struct perf_probe_event *pevs, int npevs,
1099 struct strfilter *_filter)
1102 struct debuginfo *dinfo;
1104 ret = init_probe_symbol_maps(pevs->uprobes);
1108 dinfo = open_debuginfo(pevs->target, false);
1116 for (i = 0; i < npevs && ret >= 0; i++)
1117 ret = show_available_vars_at(dinfo, &pevs[i], _filter);
1119 debuginfo__delete(dinfo);
1121 exit_probe_symbol_maps();
1125 #else /* !HAVE_DWARF_SUPPORT */
1127 static void debuginfo_cache__exit(void)
1132 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
1133 struct perf_probe_point *pp __maybe_unused,
1134 bool is_kprobe __maybe_unused)
1139 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
1140 struct probe_trace_event **tevs __maybe_unused)
1142 if (perf_probe_event_need_dwarf(pev)) {
1143 pr_warning("Debuginfo-analysis is not supported.\n");
1150 int show_line_range(struct line_range *lr __maybe_unused,
1151 const char *module __maybe_unused,
1152 bool user __maybe_unused)
1154 pr_warning("Debuginfo-analysis is not supported.\n");
1158 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
1159 int npevs __maybe_unused,
1160 struct strfilter *filter __maybe_unused)
1162 pr_warning("Debuginfo-analysis is not supported.\n");
1167 void line_range__clear(struct line_range *lr)
1173 intlist__delete(lr->line_list);
1174 memset(lr, 0, sizeof(*lr));
1177 int line_range__init(struct line_range *lr)
1179 memset(lr, 0, sizeof(*lr));
1180 lr->line_list = intlist__new(NULL);
1187 static int parse_line_num(char **ptr, int *val, const char *what)
1189 const char *start = *ptr;
1192 *val = strtol(*ptr, ptr, 0);
1193 if (errno || *ptr == start) {
1194 semantic_error("'%s' is not a valid number.\n", what);
1200 /* Check the name is good for event, group or function */
1201 static bool is_c_func_name(const char *name)
1203 if (!isalpha(*name) && *name != '_')
1205 while (*++name != '\0') {
1206 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
1213 * Stuff 'lr' according to the line range described by 'arg'.
1214 * The line range syntax is described by:
1216 * SRC[:SLN[+NUM|-ELN]]
1217 * FNC[@SRC][:SLN[+NUM|-ELN]]
1219 int parse_line_range_desc(const char *arg, struct line_range *lr)
1221 char *range, *file, *name = strdup(arg);
1230 range = strchr(name, ':');
1234 err = parse_line_num(&range, &lr->start, "start line");
1238 if (*range == '+' || *range == '-') {
1239 const char c = *range++;
1241 err = parse_line_num(&range, &lr->end, "end line");
1246 lr->end += lr->start;
1248 * Adjust the number of lines here.
1249 * If the number of lines == 1, the
1250 * the end of line should be equal to
1251 * the start of line.
1257 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
1260 if (lr->start > lr->end) {
1261 semantic_error("Start line must be smaller"
1262 " than end line.\n");
1265 if (*range != '\0') {
1266 semantic_error("Tailing with invalid str '%s'.\n", range);
1271 file = strchr(name, '@');
1274 lr->file = strdup(++file);
1275 if (lr->file == NULL) {
1279 lr->function = name;
1280 } else if (strchr(name, '/') || strchr(name, '.'))
1282 else if (is_c_func_name(name))/* We reuse it for checking funcname */
1283 lr->function = name;
1284 else { /* Invalid name */
1285 semantic_error("'%s' is not a valid function name.\n", name);
1296 static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev)
1300 ptr = strchr(*arg, ':');
1303 if (!pev->sdt && !is_c_func_name(*arg))
1305 pev->group = strdup(*arg);
1311 if (!pev->sdt && !is_c_func_name(*arg)) {
1313 semantic_error("%s is bad for event name -it must "
1314 "follow C symbol-naming rule.\n", *arg);
1317 pev->event = strdup(*arg);
1318 if (pev->event == NULL)
1324 /* Parse probepoint definition. */
1325 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
1327 struct perf_probe_point *pp = &pev->point;
1330 bool file_spec = false;
1335 * perf probe [GRP:][EVENT=]SRC[:LN|;PTN]
1336 * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
1337 * perf probe %[GRP:]SDT_EVENT
1343 * If the probe point starts with '%',
1344 * or starts with "sdt_" and has a ':' but no '=',
1345 * then it should be a SDT/cached probe point.
1347 if (arg[0] == '%' ||
1348 (!strncmp(arg, "sdt_", 4) &&
1349 !!strchr(arg, ':') && !strchr(arg, '='))) {
1355 ptr = strpbrk(arg, ";=@+%");
1359 semantic_error("%s must be an SDT name.\n",
1363 /* This must be a target file name or build id */
1364 tmp = build_id_cache__complement(ptr + 1);
1366 pev->target = build_id_cache__origname(tmp);
1369 pev->target = strdup(ptr + 1);
1374 ret = parse_perf_probe_event_name(&arg, pev);
1376 if (asprintf(&pev->point.function, "%%%s", pev->event) < 0)
1382 if (ptr && *ptr == '=') { /* Event name */
1385 ret = parse_perf_probe_event_name(&arg, pev);
1393 * Check arg is function or file name and copy it.
1395 * We consider arg to be a file spec if and only if it satisfies
1396 * all of the below criteria::
1397 * - it does not include any of "+@%",
1398 * - it includes one of ":;", and
1399 * - it has a period '.' in the name.
1401 * Otherwise, we consider arg to be a function specification.
1403 if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) {
1404 /* This is a file spec if it includes a '.' before ; or : */
1405 if (memchr(arg, '.', ptr - arg))
1409 ptr = strpbrk(arg, ";:+@%");
1429 * Keep pp->function even if this is absolute address,
1430 * so it can mark whether abs_address is valid.
1431 * Which make 'perf probe lib.bin 0x0' possible.
1433 * Note that checking length of tmp is not needed
1434 * because when we access tmp[1] we know tmp[0] is '0',
1435 * so tmp[1] should always valid (but could be '\0').
1437 if (tmp && !strncmp(tmp, "0x", 2)) {
1438 pp->abs_address = strtoul(pp->function, &tmp, 0);
1440 semantic_error("Invalid absolute address.\n");
1446 /* Parse other options */
1450 if (c == ';') { /* Lazy pattern must be the last part */
1451 pp->lazy_line = strdup(arg);
1452 if (pp->lazy_line == NULL)
1456 ptr = strpbrk(arg, ";:+@%");
1462 case ':': /* Line number */
1463 pp->line = strtoul(arg, &tmp, 0);
1465 semantic_error("There is non-digit char"
1466 " in line number.\n");
1470 case '+': /* Byte offset from a symbol */
1471 pp->offset = strtoul(arg, &tmp, 0);
1473 semantic_error("There is non-digit character"
1478 case '@': /* File name */
1480 semantic_error("SRC@SRC is not allowed.\n");
1483 pp->file = strdup(arg);
1484 if (pp->file == NULL)
1487 case '%': /* Probe places */
1488 if (strcmp(arg, "return") == 0) {
1490 } else { /* Others not supported yet */
1491 semantic_error("%%%s is not supported.\n", arg);
1495 default: /* Buggy case */
1496 pr_err("This program has a bug at %s:%d.\n",
1497 __FILE__, __LINE__);
1503 /* Exclusion check */
1504 if (pp->lazy_line && pp->line) {
1505 semantic_error("Lazy pattern can't be used with"
1510 if (pp->lazy_line && pp->offset) {
1511 semantic_error("Lazy pattern can't be used with offset.\n");
1515 if (pp->line && pp->offset) {
1516 semantic_error("Offset can't be used with line number.\n");
1520 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1521 semantic_error("File always requires line number or "
1526 if (pp->offset && !pp->function) {
1527 semantic_error("Offset requires an entry function.\n");
1531 if (pp->retprobe && !pp->function) {
1532 semantic_error("Return probe requires an entry function.\n");
1536 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1537 semantic_error("Offset/Line/Lazy pattern can't be used with "
1542 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1543 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1548 /* Parse perf-probe event argument */
1549 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1551 char *tmp, *goodname;
1552 struct perf_probe_arg_field **fieldp;
1554 pr_debug("parsing arg: %s into ", str);
1556 tmp = strchr(str, '=');
1558 arg->name = strndup(str, tmp - str);
1559 if (arg->name == NULL)
1561 pr_debug("name:%s ", arg->name);
1565 tmp = strchr(str, ':');
1566 if (tmp) { /* Type setting */
1568 arg->type = strdup(tmp + 1);
1569 if (arg->type == NULL)
1571 pr_debug("type:%s ", arg->type);
1574 tmp = strpbrk(str, "-.[");
1575 if (!is_c_varname(str) || !tmp) {
1576 /* A variable, register, symbol or special value */
1577 arg->var = strdup(str);
1578 if (arg->var == NULL)
1580 pr_debug("%s\n", arg->var);
1584 /* Structure fields or array element */
1585 arg->var = strndup(str, tmp - str);
1586 if (arg->var == NULL)
1588 goodname = arg->var;
1589 pr_debug("%s, ", arg->var);
1590 fieldp = &arg->field;
1593 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1594 if (*fieldp == NULL)
1596 if (*tmp == '[') { /* Array */
1598 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1599 (*fieldp)->ref = true;
1600 if (*tmp != ']' || tmp == str + 1) {
1601 semantic_error("Array index must be a"
1608 } else { /* Structure */
1611 (*fieldp)->ref = false;
1612 } else if (tmp[1] == '>') {
1614 (*fieldp)->ref = true;
1616 semantic_error("Argument parse error: %s\n",
1620 tmp = strpbrk(str, "-.[");
1623 (*fieldp)->name = strndup(str, tmp - str);
1624 if ((*fieldp)->name == NULL)
1627 goodname = (*fieldp)->name;
1628 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1629 fieldp = &(*fieldp)->next;
1632 (*fieldp)->name = strdup(str);
1633 if ((*fieldp)->name == NULL)
1636 goodname = (*fieldp)->name;
1637 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1639 /* If no name is specified, set the last field name (not array index)*/
1641 arg->name = strdup(goodname);
1642 if (arg->name == NULL)
1648 /* Parse perf-probe event command */
1649 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1652 int argc, i, ret = 0;
1654 argv = argv_split(cmd, &argc);
1656 pr_debug("Failed to split arguments.\n");
1659 if (argc - 1 > MAX_PROBE_ARGS) {
1660 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1664 /* Parse probe point */
1665 ret = parse_perf_probe_point(argv[0], pev);
1669 /* Copy arguments and ensure return probe has no C argument */
1670 pev->nargs = argc - 1;
1671 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1672 if (pev->args == NULL) {
1676 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1677 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1679 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1680 semantic_error("You can't specify local variable for"
1691 /* Returns true if *any* ARG is either C variable, $params or $vars. */
1692 bool perf_probe_with_var(struct perf_probe_event *pev)
1696 for (i = 0; i < pev->nargs; i++)
1697 if (is_c_varname(pev->args[i].var) ||
1698 !strcmp(pev->args[i].var, PROBE_ARG_PARAMS) ||
1699 !strcmp(pev->args[i].var, PROBE_ARG_VARS))
1704 /* Return true if this perf_probe_event requires debuginfo */
1705 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1707 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1710 if (perf_probe_with_var(pev))
1716 /* Parse probe_events event into struct probe_point */
1717 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev)
1719 struct probe_trace_point *tp = &tev->point;
1722 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1726 pr_debug("Parsing probe_events: %s\n", cmd);
1727 argv = argv_split(cmd, &argc);
1729 pr_debug("Failed to split arguments.\n");
1733 semantic_error("Too few probe arguments.\n");
1738 /* Scan event and group name. */
1739 argv0_str = strdup(argv[0]);
1740 if (argv0_str == NULL) {
1744 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1745 fmt2_str = strtok_r(NULL, "/", &fmt);
1746 fmt3_str = strtok_r(NULL, " \t", &fmt);
1747 if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
1748 || fmt3_str == NULL) {
1749 semantic_error("Failed to parse event name: %s\n", argv[0]);
1754 tev->group = strdup(fmt2_str);
1755 tev->event = strdup(fmt3_str);
1756 if (tev->group == NULL || tev->event == NULL) {
1760 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1762 tp->retprobe = (pr == 'r');
1764 /* Scan module name(if there), function name and offset */
1765 p = strchr(argv[1], ':');
1767 tp->module = strndup(argv[1], p - argv[1]);
1772 tev->uprobes = (tp->module[0] == '/');
1776 fmt1_str = strtok_r(p, "+", &fmt);
1777 /* only the address started with 0x */
1778 if (fmt1_str[0] == '0') {
1780 * Fix a special case:
1781 * if address == 0, kernel reports something like:
1782 * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax
1783 * Newer kernel may fix that, but we want to
1784 * support old kernel also.
1786 if (strcmp(fmt1_str, "0x") == 0) {
1787 if (!argv[2] || strcmp(argv[2], "(null)")) {
1794 for (i = 2; argv[i + 1] != NULL; i++)
1795 argv[i] = argv[i + 1];
1800 tp->address = strtoul(fmt1_str, NULL, 0);
1802 /* Only the symbol-based probe has offset */
1803 tp->symbol = strdup(fmt1_str);
1804 if (tp->symbol == NULL) {
1808 fmt2_str = strtok_r(NULL, "", &fmt);
1809 if (fmt2_str == NULL)
1812 tp->offset = strtoul(fmt2_str, NULL, 10);
1815 tev->nargs = argc - 2;
1816 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1817 if (tev->args == NULL) {
1821 for (i = 0; i < tev->nargs; i++) {
1822 p = strchr(argv[i + 2], '=');
1823 if (p) /* We don't need which register is assigned. */
1827 tev->args[i].name = strdup(argv[i + 2]);
1828 /* TODO: parse regs and offset */
1829 tev->args[i].value = strdup(p);
1830 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1842 /* Compose only probe arg */
1843 char *synthesize_perf_probe_arg(struct perf_probe_arg *pa)
1845 struct perf_probe_arg_field *field = pa->field;
1850 if (strbuf_init(&buf, 64) < 0)
1853 if (pa->name && pa->var)
1854 err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var);
1856 err = strbuf_addstr(&buf, pa->name ?: pa->var);
1861 if (field->name[0] == '[')
1862 err = strbuf_addstr(&buf, field->name);
1864 err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".",
1866 field = field->next;
1872 if (strbuf_addf(&buf, ":%s", pa->type) < 0)
1875 ret = strbuf_detach(&buf, NULL);
1877 strbuf_release(&buf);
1881 /* Compose only probe point (not argument) */
1882 char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1885 char *tmp, *ret = NULL;
1888 if (strbuf_init(&buf, 64) < 0)
1892 if (strbuf_addstr(&buf, pp->function) < 0)
1895 err = strbuf_addf(&buf, "+%lu", pp->offset);
1897 err = strbuf_addf(&buf, ":%d", pp->line);
1898 else if (pp->retprobe)
1899 err = strbuf_addstr(&buf, "%return");
1907 tmp = strchr(pp->file + len - 30, '/');
1908 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1910 err = strbuf_addf(&buf, "@%s", tmp);
1911 if (!err && !pp->function && pp->line)
1912 err = strbuf_addf(&buf, ":%d", pp->line);
1915 ret = strbuf_detach(&buf, NULL);
1917 strbuf_release(&buf);
1921 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1924 char *tmp, *ret = NULL;
1927 if (strbuf_init(&buf, 64))
1930 if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP,
1934 tmp = synthesize_perf_probe_point(&pev->point);
1935 if (!tmp || strbuf_addstr(&buf, tmp) < 0)
1939 for (i = 0; i < pev->nargs; i++) {
1940 tmp = synthesize_perf_probe_arg(pev->args + i);
1941 if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0)
1946 ret = strbuf_detach(&buf, NULL);
1948 strbuf_release(&buf);
1952 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1953 struct strbuf *buf, int depth)
1957 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1962 err = strbuf_addf(buf, "%+ld(", ref->offset);
1963 return (err < 0) ? err : depth;
1966 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1969 struct probe_trace_arg_ref *ref = arg->ref;
1972 /* Argument name or separator */
1974 err = strbuf_addf(buf, " %s=", arg->name);
1976 err = strbuf_addch(buf, ' ');
1980 /* Special case: @XXX */
1981 if (arg->value[0] == '@' && arg->ref)
1984 /* Dereferencing arguments */
1986 depth = __synthesize_probe_trace_arg_ref(ref, buf, 1);
1991 /* Print argument value */
1992 if (arg->value[0] == '@' && arg->ref)
1993 err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset);
1995 err = strbuf_addstr(buf, arg->value);
1998 while (!err && depth--)
1999 err = strbuf_addch(buf, ')');
2001 /* Print argument type */
2002 if (!err && arg->type)
2003 err = strbuf_addf(buf, ":%s", arg->type);
2008 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
2010 struct probe_trace_point *tp = &tev->point;
2015 /* Uprobes must have tp->module */
2016 if (tev->uprobes && !tp->module)
2019 if (strbuf_init(&buf, 32) < 0)
2022 if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
2023 tev->group, tev->event) < 0)
2026 * If tp->address == 0, then this point must be a
2027 * absolute address uprobe.
2028 * try_to_find_absolute_address() should have made
2029 * tp->symbol to "0x0".
2031 if (tev->uprobes && !tp->address) {
2032 if (!tp->symbol || strcmp(tp->symbol, "0x0"))
2036 /* Use the tp->address for uprobes */
2038 err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address);
2039 else if (!strncmp(tp->symbol, "0x", 2))
2040 /* Absolute address. See try_to_find_absolute_address() */
2041 err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "",
2042 tp->module ? ":" : "", tp->address);
2044 err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "",
2045 tp->module ? ":" : "", tp->symbol, tp->offset);
2049 for (i = 0; i < tev->nargs; i++)
2050 if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0)
2053 ret = strbuf_detach(&buf, NULL);
2055 strbuf_release(&buf);
2059 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
2060 struct perf_probe_point *pp,
2063 struct symbol *sym = NULL;
2064 struct map *map = NULL;
2065 u64 addr = tp->address;
2069 map = dso__new_map(tp->module);
2072 sym = map__find_symbol(map, addr);
2074 if (tp->symbol && !addr) {
2075 if (kernel_get_symbol_address_by_name(tp->symbol,
2076 &addr, true, false) < 0)
2081 sym = __find_kernel_function(addr, &map);
2088 pp->retprobe = tp->retprobe;
2089 pp->offset = addr - map->unmap_ip(map, sym->start);
2090 pp->function = strdup(sym->name);
2091 ret = pp->function ? 0 : -ENOMEM;
2094 if (map && !is_kprobe) {
2101 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
2102 struct perf_probe_point *pp,
2108 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
2111 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
2115 pr_debug("Failed to find probe point from both of dwarf and map.\n");
2118 pp->function = strdup(tp->symbol);
2119 pp->offset = tp->offset;
2121 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
2124 pp->function = strdup(buf);
2127 if (pp->function == NULL)
2130 pp->retprobe = tp->retprobe;
2135 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
2136 struct perf_probe_event *pev, bool is_kprobe)
2138 struct strbuf buf = STRBUF_INIT;
2141 /* Convert event/group name */
2142 pev->event = strdup(tev->event);
2143 pev->group = strdup(tev->group);
2144 if (pev->event == NULL || pev->group == NULL)
2147 /* Convert trace_point to probe_point */
2148 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
2152 /* Convert trace_arg to probe_arg */
2153 pev->nargs = tev->nargs;
2154 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
2155 if (pev->args == NULL)
2157 for (i = 0; i < tev->nargs && ret >= 0; i++) {
2158 if (tev->args[i].name)
2159 pev->args[i].name = strdup(tev->args[i].name);
2161 if ((ret = strbuf_init(&buf, 32)) < 0)
2163 ret = synthesize_probe_trace_arg(&tev->args[i], &buf);
2164 pev->args[i].name = strbuf_detach(&buf, NULL);
2166 if (pev->args[i].name == NULL && ret >= 0)
2171 clear_perf_probe_event(pev);
2176 void clear_perf_probe_event(struct perf_probe_event *pev)
2178 struct perf_probe_arg_field *field, *next;
2184 clear_perf_probe_point(&pev->point);
2186 for (i = 0; i < pev->nargs; i++) {
2187 free(pev->args[i].name);
2188 free(pev->args[i].var);
2189 free(pev->args[i].type);
2190 field = pev->args[i].field;
2193 zfree(&field->name);
2199 memset(pev, 0, sizeof(*pev));
2202 #define strdup_or_goto(str, label) \
2203 ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; })
2205 static int perf_probe_point__copy(struct perf_probe_point *dst,
2206 struct perf_probe_point *src)
2208 dst->file = strdup_or_goto(src->file, out_err);
2209 dst->function = strdup_or_goto(src->function, out_err);
2210 dst->lazy_line = strdup_or_goto(src->lazy_line, out_err);
2211 dst->line = src->line;
2212 dst->retprobe = src->retprobe;
2213 dst->offset = src->offset;
2217 clear_perf_probe_point(dst);
2221 static int perf_probe_arg__copy(struct perf_probe_arg *dst,
2222 struct perf_probe_arg *src)
2224 struct perf_probe_arg_field *field, **ppfield;
2226 dst->name = strdup_or_goto(src->name, out_err);
2227 dst->var = strdup_or_goto(src->var, out_err);
2228 dst->type = strdup_or_goto(src->type, out_err);
2231 ppfield = &(dst->field);
2233 *ppfield = zalloc(sizeof(*field));
2236 (*ppfield)->name = strdup_or_goto(field->name, out_err);
2237 (*ppfield)->index = field->index;
2238 (*ppfield)->ref = field->ref;
2239 field = field->next;
2240 ppfield = &((*ppfield)->next);
2247 int perf_probe_event__copy(struct perf_probe_event *dst,
2248 struct perf_probe_event *src)
2252 dst->event = strdup_or_goto(src->event, out_err);
2253 dst->group = strdup_or_goto(src->group, out_err);
2254 dst->target = strdup_or_goto(src->target, out_err);
2255 dst->uprobes = src->uprobes;
2257 if (perf_probe_point__copy(&dst->point, &src->point) < 0)
2260 dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs);
2263 dst->nargs = src->nargs;
2265 for (i = 0; i < src->nargs; i++)
2266 if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0)
2271 clear_perf_probe_event(dst);
2275 void clear_probe_trace_event(struct probe_trace_event *tev)
2277 struct probe_trace_arg_ref *ref, *next;
2282 free(tev->point.symbol);
2283 free(tev->point.realname);
2284 free(tev->point.module);
2285 for (i = 0; i < tev->nargs; i++) {
2286 free(tev->args[i].name);
2287 free(tev->args[i].value);
2288 free(tev->args[i].type);
2289 ref = tev->args[i].ref;
2297 memset(tev, 0, sizeof(*tev));
2300 struct kprobe_blacklist_node {
2301 struct list_head list;
2302 unsigned long start;
2307 static void kprobe_blacklist__delete(struct list_head *blacklist)
2309 struct kprobe_blacklist_node *node;
2311 while (!list_empty(blacklist)) {
2312 node = list_first_entry(blacklist,
2313 struct kprobe_blacklist_node, list);
2314 list_del(&node->list);
2320 static int kprobe_blacklist__load(struct list_head *blacklist)
2322 struct kprobe_blacklist_node *node;
2323 const char *__debugfs = debugfs__mountpoint();
2324 char buf[PATH_MAX], *p;
2328 if (__debugfs == NULL)
2331 ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs);
2335 fp = fopen(buf, "r");
2340 while (fgets(buf, PATH_MAX, fp)) {
2341 node = zalloc(sizeof(*node));
2346 INIT_LIST_HEAD(&node->list);
2347 list_add_tail(&node->list, blacklist);
2348 if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) {
2352 p = strchr(buf, '\t');
2355 if (p[strlen(p) - 1] == '\n')
2356 p[strlen(p) - 1] = '\0';
2358 p = (char *)"unknown";
2359 node->symbol = strdup(p);
2360 if (!node->symbol) {
2364 pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n",
2365 node->start, node->end, node->symbol);
2369 kprobe_blacklist__delete(blacklist);
2375 static struct kprobe_blacklist_node *
2376 kprobe_blacklist__find_by_address(struct list_head *blacklist,
2377 unsigned long address)
2379 struct kprobe_blacklist_node *node;
2381 list_for_each_entry(node, blacklist, list) {
2382 if (node->start <= address && address <= node->end)
2389 static LIST_HEAD(kprobe_blacklist);
2391 static void kprobe_blacklist__init(void)
2393 if (!list_empty(&kprobe_blacklist))
2396 if (kprobe_blacklist__load(&kprobe_blacklist) < 0)
2397 pr_debug("No kprobe blacklist support, ignored\n");
2400 static void kprobe_blacklist__release(void)
2402 kprobe_blacklist__delete(&kprobe_blacklist);
2405 static bool kprobe_blacklist__listed(unsigned long address)
2407 return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address);
2410 static int perf_probe_event__sprintf(const char *group, const char *event,
2411 struct perf_probe_event *pev,
2413 struct strbuf *result)
2418 if (asprintf(&buf, "%s:%s", group, event) < 0)
2420 ret = strbuf_addf(result, " %-20s (on ", buf);
2425 /* Synthesize only event probe point */
2426 buf = synthesize_perf_probe_point(&pev->point);
2429 ret = strbuf_addstr(result, buf);
2433 ret = strbuf_addf(result, " in %s", module);
2435 if (!ret && pev->nargs > 0) {
2436 ret = strbuf_add(result, " with", 5);
2437 for (i = 0; !ret && i < pev->nargs; i++) {
2438 buf = synthesize_perf_probe_arg(&pev->args[i]);
2441 ret = strbuf_addf(result, " %s", buf);
2446 ret = strbuf_addch(result, ')');
2452 int show_perf_probe_event(const char *group, const char *event,
2453 struct perf_probe_event *pev,
2454 const char *module, bool use_stdout)
2456 struct strbuf buf = STRBUF_INIT;
2459 ret = perf_probe_event__sprintf(group, event, pev, module, &buf);
2462 printf("%s\n", buf.buf);
2464 pr_info("%s\n", buf.buf);
2466 strbuf_release(&buf);
2471 static bool filter_probe_trace_event(struct probe_trace_event *tev,
2472 struct strfilter *filter)
2476 /* At first, check the event name itself */
2477 if (strfilter__compare(filter, tev->event))
2480 /* Next, check the combination of name and group */
2481 if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0)
2483 return strfilter__compare(filter, tmp);
2486 static int __show_perf_probe_events(int fd, bool is_kprobe,
2487 struct strfilter *filter)
2490 struct probe_trace_event tev;
2491 struct perf_probe_event pev;
2492 struct strlist *rawlist;
2493 struct str_node *ent;
2495 memset(&tev, 0, sizeof(tev));
2496 memset(&pev, 0, sizeof(pev));
2498 rawlist = probe_file__get_rawlist(fd);
2502 strlist__for_each_entry(ent, rawlist) {
2503 ret = parse_probe_trace_command(ent->s, &tev);
2505 if (!filter_probe_trace_event(&tev, filter))
2507 ret = convert_to_perf_probe_event(&tev, &pev,
2511 ret = show_perf_probe_event(pev.group, pev.event,
2512 &pev, tev.point.module,
2516 clear_perf_probe_event(&pev);
2517 clear_probe_trace_event(&tev);
2521 strlist__delete(rawlist);
2522 /* Cleanup cached debuginfo if needed */
2523 debuginfo_cache__exit();
2528 /* List up current perf-probe events */
2529 int show_perf_probe_events(struct strfilter *filter)
2531 int kp_fd, up_fd, ret;
2535 if (probe_conf.cache)
2536 return probe_cache__show_all_caches(filter);
2538 ret = init_probe_symbol_maps(false);
2542 ret = probe_file__open_both(&kp_fd, &up_fd, 0);
2547 ret = __show_perf_probe_events(kp_fd, true, filter);
2548 if (up_fd >= 0 && ret >= 0)
2549 ret = __show_perf_probe_events(up_fd, false, filter);
2554 exit_probe_symbol_maps();
2559 static int get_new_event_name(char *buf, size_t len, const char *base,
2560 struct strlist *namelist, bool allow_suffix)
2567 nbase = strdup(base);
2571 /* Cut off the dot suffixes (e.g. .const, .isra)*/
2572 p = strchr(nbase, '.');
2573 if (p && p != nbase)
2576 /* Try no suffix number */
2577 ret = e_snprintf(buf, len, "%s", nbase);
2579 pr_debug("snprintf() failed: %d\n", ret);
2582 if (!strlist__has_entry(namelist, buf))
2585 if (!allow_suffix) {
2586 pr_warning("Error: event \"%s\" already exists.\n"
2587 " Hint: Remove existing event by 'perf probe -d'\n"
2588 " or force duplicates by 'perf probe -f'\n"
2589 " or set 'force=yes' in BPF source.\n",
2595 /* Try to add suffix */
2596 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2597 ret = e_snprintf(buf, len, "%s_%d", nbase, i);
2599 pr_debug("snprintf() failed: %d\n", ret);
2602 if (!strlist__has_entry(namelist, buf))
2605 if (i == MAX_EVENT_INDEX) {
2606 pr_warning("Too many events are on the same function.\n");
2615 /* Warn if the current kernel's uprobe implementation is old */
2616 static void warn_uprobe_event_compat(struct probe_trace_event *tev)
2619 char *buf = synthesize_probe_trace_command(tev);
2621 /* Old uprobe event doesn't support memory dereference */
2622 if (!tev->uprobes || tev->nargs == 0 || !buf)
2625 for (i = 0; i < tev->nargs; i++)
2626 if (strglobmatch(tev->args[i].value, "[$@+-]*")) {
2627 pr_warning("Please upgrade your kernel to at least "
2628 "3.14 to have access to feature %s\n",
2629 tev->args[i].value);
2636 /* Set new name from original perf_probe_event and namelist */
2637 static int probe_trace_event__set_name(struct probe_trace_event *tev,
2638 struct perf_probe_event *pev,
2639 struct strlist *namelist,
2642 const char *event, *group;
2646 /* If probe_event or trace_event already have the name, reuse it */
2647 if (pev->event && !pev->sdt)
2649 else if (tev->event)
2652 /* Or generate new one from probe point */
2653 if (pev->point.function &&
2654 (strncmp(pev->point.function, "0x", 2) != 0) &&
2655 !strisglob(pev->point.function))
2656 event = pev->point.function;
2658 event = tev->point.realname;
2660 if (pev->group && !pev->sdt)
2662 else if (tev->group)
2665 group = PERFPROBE_GROUP;
2667 /* Get an unused new event name */
2668 ret = get_new_event_name(buf, 64, event,
2669 namelist, allow_suffix);
2675 tev->event = strdup(event);
2676 tev->group = strdup(group);
2677 if (tev->event == NULL || tev->group == NULL)
2680 /* Add added event name to namelist */
2681 strlist__add(namelist, event);
2685 static int __open_probe_file_and_namelist(bool uprobe,
2686 struct strlist **namelist)
2690 fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0));
2694 /* Get current event names */
2695 *namelist = probe_file__get_namelist(fd);
2697 pr_debug("Failed to get current event list.\n");
2704 static int __add_probe_trace_events(struct perf_probe_event *pev,
2705 struct probe_trace_event *tevs,
2706 int ntevs, bool allow_suffix)
2708 int i, fd[2] = {-1, -1}, up, ret;
2709 struct probe_trace_event *tev = NULL;
2710 struct probe_cache *cache = NULL;
2711 struct strlist *namelist[2] = {NULL, NULL};
2713 up = pev->uprobes ? 1 : 0;
2714 fd[up] = __open_probe_file_and_namelist(up, &namelist[up]);
2719 for (i = 0; i < ntevs; i++) {
2721 up = tev->uprobes ? 1 : 0;
2722 if (fd[up] == -1) { /* Open the kprobe/uprobe_events */
2723 fd[up] = __open_probe_file_and_namelist(up,
2728 /* Skip if the symbol is out of .text or blacklisted */
2729 if (!tev->point.symbol && !pev->uprobes)
2732 /* Set new name for tev (and update namelist) */
2733 ret = probe_trace_event__set_name(tev, pev, namelist[up],
2738 ret = probe_file__add_event(fd[up], tev);
2743 * Probes after the first probe which comes from same
2744 * user input are always allowed to add suffix, because
2745 * there might be several addresses corresponding to
2748 allow_suffix = true;
2750 if (ret == -EINVAL && pev->uprobes)
2751 warn_uprobe_event_compat(tev);
2752 if (ret == 0 && probe_conf.cache) {
2753 cache = probe_cache__new(pev->target);
2755 probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 ||
2756 probe_cache__commit(cache) < 0)
2757 pr_warning("Failed to add event to probe cache\n");
2758 probe_cache__delete(cache);
2762 for (up = 0; up < 2; up++) {
2763 strlist__delete(namelist[up]);
2770 static int find_probe_functions(struct map *map, char *name,
2771 struct symbol **syms)
2775 struct rb_node *tmp;
2777 if (map__load(map) < 0)
2780 map__for_each_symbol(map, sym, tmp) {
2781 if (strglobmatch(sym->name, name)) {
2783 if (syms && found < probe_conf.max_probes)
2784 syms[found - 1] = sym;
2791 void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused,
2792 struct probe_trace_event *tev __maybe_unused,
2793 struct map *map __maybe_unused,
2794 struct symbol *sym __maybe_unused) { }
2797 * Find probe function addresses from map.
2798 * Return an error or the number of found probe_trace_event
2800 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2801 struct probe_trace_event **tevs)
2803 struct map *map = NULL;
2804 struct ref_reloc_sym *reloc_sym = NULL;
2806 struct symbol **syms = NULL;
2807 struct probe_trace_event *tev;
2808 struct perf_probe_point *pp = &pev->point;
2809 struct probe_trace_point *tp;
2810 int num_matched_functions;
2811 int ret, i, j, skipped = 0;
2814 map = get_target_map(pev->target, pev->uprobes);
2820 syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes);
2827 * Load matched symbols: Since the different local symbols may have
2828 * same name but different addresses, this lists all the symbols.
2830 num_matched_functions = find_probe_functions(map, pp->function, syms);
2831 if (num_matched_functions == 0) {
2832 pr_err("Failed to find symbol %s in %s\n", pp->function,
2833 pev->target ? : "kernel");
2836 } else if (num_matched_functions > probe_conf.max_probes) {
2837 pr_err("Too many functions matched in %s\n",
2838 pev->target ? : "kernel");
2843 /* Note that the symbols in the kmodule are not relocated */
2844 if (!pev->uprobes && !pp->retprobe && !pev->target) {
2845 reloc_sym = kernel_get_ref_reloc_sym();
2847 pr_warning("Relocated base symbol is not found!\n");
2853 /* Setup result trace-probe-events */
2854 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2862 for (j = 0; j < num_matched_functions; j++) {
2865 tev = (*tevs) + ret;
2867 if (ret == num_matched_functions) {
2868 pr_warning("Too many symbols are listed. Skip it.\n");
2873 if (pp->offset > sym->end - sym->start) {
2874 pr_warning("Offset %ld is bigger than the size of %s\n",
2875 pp->offset, sym->name);
2879 /* Add one probe point */
2880 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2882 /* Check the kprobe (not in module) is within .text */
2883 if (!pev->uprobes && !pev->target &&
2884 kprobe_warn_out_range(sym->name, tp->address)) {
2885 tp->symbol = NULL; /* Skip it */
2887 } else if (reloc_sym) {
2888 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2889 tp->offset = tp->address - reloc_sym->addr;
2891 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2892 tp->offset = pp->offset;
2894 tp->realname = strdup_or_goto(sym->name, nomem_out);
2896 tp->retprobe = pp->retprobe;
2899 tev->point.module = strdup_or_goto(pev->target,
2902 mod_name = find_module_name(pev->target);
2904 strdup(mod_name ? mod_name : pev->target);
2906 if (!tev->point.module)
2910 tev->uprobes = pev->uprobes;
2911 tev->nargs = pev->nargs;
2913 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2915 if (tev->args == NULL)
2918 for (i = 0; i < tev->nargs; i++) {
2919 if (pev->args[i].name)
2921 strdup_or_goto(pev->args[i].name,
2924 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2926 if (pev->args[i].type)
2928 strdup_or_goto(pev->args[i].type,
2931 arch__fix_tev_from_maps(pev, tev, map, sym);
2933 if (ret == skipped) {
2946 clear_probe_trace_events(*tevs, num_matched_functions);
2951 static int try_to_find_absolute_address(struct perf_probe_event *pev,
2952 struct probe_trace_event **tevs)
2954 struct perf_probe_point *pp = &pev->point;
2955 struct probe_trace_event *tev;
2956 struct probe_trace_point *tp;
2959 if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2)))
2961 if (perf_probe_event_need_dwarf(pev))
2965 * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at
2968 * Only one tev can be generated by this.
2970 *tevs = zalloc(sizeof(*tev));
2978 * Don't use tp->offset, use address directly, because
2979 * in synthesize_probe_trace_command() address cannot be
2982 tp->address = pev->point.abs_address;
2983 tp->retprobe = pp->retprobe;
2984 tev->uprobes = pev->uprobes;
2988 * Give it a '0x' leading symbol name.
2989 * In __add_probe_trace_events, a NULL symbol is interpreted as
2992 if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0)
2995 /* For kprobe, check range */
2996 if ((!tev->uprobes) &&
2997 (kprobe_warn_out_range(tev->point.symbol,
2998 tev->point.address))) {
3003 if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0)
3007 tp->module = strdup(pev->target);
3013 tev->group = strdup(pev->group);
3019 tev->event = strdup(pev->event);
3024 tev->nargs = pev->nargs;
3025 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
3029 for (i = 0; i < tev->nargs; i++)
3030 copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]);
3035 clear_probe_trace_events(*tevs, 1);
3040 /* Concatinate two arrays */
3041 static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b)
3045 ret = malloc(sz_a + sz_b);
3047 memcpy(ret, a, sz_a);
3048 memcpy(ret + sz_a, b, sz_b);
3054 concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs,
3055 struct probe_trace_event **tevs2, int ntevs2)
3057 struct probe_trace_event *new_tevs;
3067 if (*ntevs + ntevs2 > probe_conf.max_probes)
3070 /* Concatinate the array of probe_trace_event */
3071 new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs),
3072 *tevs2, ntevs2 * sizeof(**tevs2));
3082 clear_probe_trace_events(*tevs2, ntevs2);
3089 * Try to find probe_trace_event from given probe caches. Return the number
3090 * of cached events found, if an error occurs return the error.
3092 static int find_cached_events(struct perf_probe_event *pev,
3093 struct probe_trace_event **tevs,
3096 struct probe_cache *cache;
3097 struct probe_cache_entry *entry;
3098 struct probe_trace_event *tmp_tevs = NULL;
3102 cache = probe_cache__new(target);
3103 /* Return 0 ("not found") if the target has no probe cache. */
3107 for_each_probe_cache_entry(entry, cache) {
3108 /* Skip the cache entry which has no name */
3109 if (!entry->pev.event || !entry->pev.group)
3111 if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) &&
3112 strglobmatch(entry->pev.event, pev->event)) {
3113 ret = probe_cache_entry__get_event(entry, &tmp_tevs);
3115 ret = concat_probe_trace_events(tevs, &ntevs,
3121 probe_cache__delete(cache);
3123 clear_probe_trace_events(*tevs, ntevs);
3127 if (ntevs > 0 && target && target[0] == '/')
3128 pev->uprobes = true;
3134 /* Try to find probe_trace_event from all probe caches */
3135 static int find_cached_events_all(struct perf_probe_event *pev,
3136 struct probe_trace_event **tevs)
3138 struct probe_trace_event *tmp_tevs = NULL;
3139 struct strlist *bidlist;
3140 struct str_node *nd;
3145 /* Get the buildid list of all valid caches */
3146 bidlist = build_id_cache__list_all(true);
3149 pr_debug("Failed to get buildids: %d\n", ret);
3154 strlist__for_each_entry(nd, bidlist) {
3155 pathname = build_id_cache__origname(nd->s);
3156 ret = find_cached_events(pev, &tmp_tevs, pathname);
3157 /* In the case of cnt == 0, we just skip it */
3159 ret = concat_probe_trace_events(tevs, &ntevs,
3165 strlist__delete(bidlist);
3168 clear_probe_trace_events(*tevs, ntevs);
3176 static int find_probe_trace_events_from_cache(struct perf_probe_event *pev,
3177 struct probe_trace_event **tevs)
3179 struct probe_cache *cache;
3180 struct probe_cache_entry *entry;
3181 struct probe_trace_event *tev;
3182 struct str_node *node;
3186 /* For SDT/cached events, we use special search functions */
3188 return find_cached_events_all(pev, tevs);
3190 return find_cached_events(pev, tevs, pev->target);
3192 cache = probe_cache__new(pev->target);
3196 entry = probe_cache__find(cache, pev);
3198 /* SDT must be in the cache */
3199 ret = pev->sdt ? -ENOENT : 0;
3203 ret = strlist__nr_entries(entry->tevlist);
3204 if (ret > probe_conf.max_probes) {
3205 pr_debug("Too many entries matched in the cache of %s\n",
3206 pev->target ? : "kernel");
3211 *tevs = zalloc(ret * sizeof(*tev));
3218 strlist__for_each_entry(node, entry->tevlist) {
3219 tev = &(*tevs)[i++];
3220 ret = parse_probe_trace_command(node->s, tev);
3223 /* Set the uprobes attribute as same as original */
3224 tev->uprobes = pev->uprobes;
3229 probe_cache__delete(cache);
3233 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
3234 struct probe_trace_event **tevs)
3238 if (!pev->group && !pev->sdt) {
3239 /* Set group name if not given */
3240 if (!pev->uprobes) {
3241 pev->group = strdup(PERFPROBE_GROUP);
3242 ret = pev->group ? 0 : -ENOMEM;
3244 ret = convert_exec_to_group(pev->target, &pev->group);
3246 pr_warning("Failed to make a group name.\n");
3251 ret = try_to_find_absolute_address(pev, tevs);
3255 /* At first, we need to lookup cache entry */
3256 ret = find_probe_trace_events_from_cache(pev, tevs);
3257 if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */
3258 return ret == 0 ? -ENOENT : ret; /* Found in probe cache */
3260 /* Convert perf_probe_event with debuginfo */
3261 ret = try_to_find_probe_trace_events(pev, tevs);
3263 return ret; /* Found in debuginfo or got an error */
3265 return find_probe_trace_events_from_map(pev, tevs);
3268 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3272 /* Loop 1: convert all events */
3273 for (i = 0; i < npevs; i++) {
3274 /* Init kprobe blacklist if needed */
3275 if (!pevs[i].uprobes)
3276 kprobe_blacklist__init();
3277 /* Convert with or without debuginfo */
3278 ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs);
3281 pevs[i].ntevs = ret;
3283 /* This just release blacklist only if allocated */
3284 kprobe_blacklist__release();
3289 static int show_probe_trace_event(struct probe_trace_event *tev)
3291 char *buf = synthesize_probe_trace_command(tev);
3294 pr_debug("Failed to synthesize probe trace event.\n");
3298 /* Showing definition always go stdout */
3299 printf("%s\n", buf);
3305 int show_probe_trace_events(struct perf_probe_event *pevs, int npevs)
3307 struct strlist *namelist = strlist__new(NULL, NULL);
3308 struct probe_trace_event *tev;
3309 struct perf_probe_event *pev;
3315 for (j = 0; j < npevs && !ret; j++) {
3317 for (i = 0; i < pev->ntevs && !ret; i++) {
3318 tev = &pev->tevs[i];
3319 /* Skip if the symbol is out of .text or blacklisted */
3320 if (!tev->point.symbol && !pev->uprobes)
3323 /* Set new name for tev (and update namelist) */
3324 ret = probe_trace_event__set_name(tev, pev,
3327 ret = show_probe_trace_event(tev);
3330 strlist__delete(namelist);
3335 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3339 /* Loop 2: add all events */
3340 for (i = 0; i < npevs; i++) {
3341 ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs,
3343 probe_conf.force_add);
3350 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3354 /* Loop 3: cleanup and free trace events */
3355 for (i = 0; i < npevs; i++) {
3356 for (j = 0; j < pevs[i].ntevs; j++)
3357 clear_probe_trace_event(&pevs[i].tevs[j]);
3358 zfree(&pevs[i].tevs);
3360 clear_perf_probe_event(&pevs[i]);
3364 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3368 ret = init_probe_symbol_maps(pevs->uprobes);
3372 ret = convert_perf_probe_events(pevs, npevs);
3374 ret = apply_perf_probe_events(pevs, npevs);
3376 cleanup_perf_probe_events(pevs, npevs);
3378 exit_probe_symbol_maps();
3382 int del_perf_probe_events(struct strfilter *filter)
3384 int ret, ret2, ufd = -1, kfd = -1;
3385 char *str = strfilter__string(filter);
3390 /* Get current event names */
3391 ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
3395 ret = probe_file__del_events(kfd, filter);
3396 if (ret < 0 && ret != -ENOENT)
3399 ret2 = probe_file__del_events(ufd, filter);
3400 if (ret2 < 0 && ret2 != -ENOENT) {
3417 int show_available_funcs(const char *target, struct strfilter *_filter,
3424 ret = init_probe_symbol_maps(user);
3428 /* Get a symbol map */
3429 map = get_target_map(target, user);
3431 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
3435 ret = map__load(map);
3438 char *str = strfilter__string(_filter);
3439 pr_err("Failed to find symbols matched to \"%s\"\n",
3443 pr_err("Failed to load symbols in %s\n",
3444 (target) ? : "kernel");
3447 if (!dso__sorted_by_name(map->dso, map->type))
3448 dso__sort_by_name(map->dso, map->type);
3450 /* Show all (filtered) symbols */
3453 for (nd = rb_first(&map->dso->symbol_names[map->type]); nd; nd = rb_next(nd)) {
3454 struct symbol_name_rb_node *pos = rb_entry(nd, struct symbol_name_rb_node, rb_node);
3456 if (strfilter__compare(_filter, pos->sym.name))
3457 printf("%s\n", pos->sym.name);
3462 exit_probe_symbol_maps();
3467 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
3468 struct perf_probe_arg *pvar)
3470 tvar->value = strdup(pvar->var);
3471 if (tvar->value == NULL)
3474 tvar->type = strdup(pvar->type);
3475 if (tvar->type == NULL)
3479 tvar->name = strdup(pvar->name);
3480 if (tvar->name == NULL)