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.
23 #include <sys/utsname.h>
24 #include <sys/types.h>
39 #include "strfilter.h"
45 #include <api/fs/fs.h>
46 #include "trace-event.h" /* For __maybe_unused */
47 #include "probe-event.h"
48 #include "probe-finder.h"
49 #include "probe-file.h"
53 #include "sane_ctype.h"
55 #define PERFPROBE_GROUP "probe"
57 bool probe_event_dry_run; /* Dry run flag */
58 struct probe_conf probe_conf;
60 #define semantic_error(msg ...) pr_err("Semantic error :" msg)
62 int e_snprintf(char *str, size_t size, const char *format, ...)
67 ret = vsnprintf(str, size, format, ap);
74 static struct machine *host_machine;
76 /* Initialize symbol maps and path of vmlinux/modules */
77 int init_probe_symbol_maps(bool user_only)
81 symbol_conf.sort_by_name = true;
82 symbol_conf.allow_aliases = true;
83 ret = symbol__init(NULL);
85 pr_debug("Failed to init symbol map.\n");
89 if (host_machine || user_only) /* already initialized */
92 if (symbol_conf.vmlinux_name)
93 pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name);
95 host_machine = machine__new_host();
97 pr_debug("machine__new_host() failed.\n");
103 pr_warning("Failed to init vmlinux path.\n");
107 void exit_probe_symbol_maps(void)
109 machine__delete(host_machine);
114 static struct symbol *__find_kernel_function_by_name(const char *name,
117 return machine__find_kernel_function_by_name(host_machine, name, mapp);
120 static struct symbol *__find_kernel_function(u64 addr, struct map **mapp)
122 return machine__find_kernel_function(host_machine, addr, mapp);
125 static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void)
127 /* kmap->ref_reloc_sym should be set if host_machine is initialized */
129 struct map *map = machine__kernel_map(host_machine);
131 if (map__load(map) < 0)
134 kmap = map__kmap(map);
137 return kmap->ref_reloc_sym;
140 static int kernel_get_symbol_address_by_name(const char *name, u64 *addr,
141 bool reloc, bool reladdr)
143 struct ref_reloc_sym *reloc_sym;
147 /* ref_reloc_sym is just a label. Need a special fix*/
148 reloc_sym = kernel_get_ref_reloc_sym();
149 if (reloc_sym && strcmp(name, reloc_sym->name) == 0)
150 *addr = (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr;
152 sym = __find_kernel_function_by_name(name, &map);
155 *addr = map->unmap_ip(map, sym->start) -
156 ((reloc) ? 0 : map->reloc) -
157 ((reladdr) ? map->start : 0);
162 static struct map *kernel_get_module_map(const char *module)
164 struct map_groups *grp = &host_machine->kmaps;
165 struct maps *maps = &grp->maps[MAP__FUNCTION];
168 /* A file path -- this is an offline module */
169 if (module && strchr(module, '/'))
170 return dso__new_map(module);
175 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
176 /* short_name is "[module]" */
177 if (strncmp(pos->dso->short_name + 1, module,
178 pos->dso->short_name_len - 2) == 0 &&
179 module[pos->dso->short_name_len - 2] == '\0') {
187 struct map *get_target_map(const char *target, bool user)
189 /* Init maps of given executable or kernel */
191 return dso__new_map(target);
193 return kernel_get_module_map(target);
196 static int convert_exec_to_group(const char *exec, char **result)
198 char *ptr1, *ptr2, *exec_copy;
202 exec_copy = strdup(exec);
206 ptr1 = basename(exec_copy);
212 for (ptr2 = ptr1; *ptr2 != '\0'; ptr2++) {
213 if (!isalnum(*ptr2) && *ptr2 != '_') {
219 ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1);
223 *result = strdup(buf);
224 ret = *result ? 0 : -ENOMEM;
231 static void clear_perf_probe_point(struct perf_probe_point *pp)
238 static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs)
242 for (i = 0; i < ntevs; i++)
243 clear_probe_trace_event(tevs + i);
246 static bool kprobe_blacklist__listed(unsigned long address);
247 static bool kprobe_warn_out_range(const char *symbol, unsigned long address)
252 /* Get the address of _etext for checking non-probable text symbol */
253 ret = kernel_get_symbol_address_by_name("_etext", &etext_addr,
256 if (ret == 0 && etext_addr < address)
257 pr_warning("%s is out of .text, skip it.\n", symbol);
258 else if (kprobe_blacklist__listed(address))
259 pr_warning("%s is blacklisted function, skip it.\n", symbol);
267 * @module can be module name of module file path. In case of path,
268 * inspect elf and find out what is actual module name.
269 * Caller has to free mod_name after using it.
271 static char *find_module_name(const char *module)
279 char *mod_name = NULL;
282 fd = open(module, O_RDONLY);
286 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
290 if (gelf_getehdr(elf, &ehdr) == NULL)
293 sec = elf_section_by_name(elf, &ehdr, &shdr,
294 ".gnu.linkonce.this_module", NULL);
298 data = elf_getdata(sec, NULL);
299 if (!data || !data->d_buf)
304 * '.gnu.linkonce.this_module' section of kernel module elf directly
305 * maps to 'struct module' from linux/module.h. This section contains
306 * actual module name which will be used by kernel after loading it.
307 * But, we cannot use 'struct module' here since linux/module.h is not
308 * exposed to user-space. Offset of 'name' has remained same from long
309 * time, so hardcoding it here.
311 if (ehdr.e_ident[EI_CLASS] == ELFCLASS32)
313 else /* expect ELFCLASS64 by default */
316 mod_name = strdup((char *)data->d_buf + name_offset);
325 #ifdef HAVE_DWARF_SUPPORT
327 static int kernel_get_module_dso(const char *module, struct dso **pdso)
331 const char *vmlinux_name;
335 char module_name[128];
337 snprintf(module_name, sizeof(module_name), "[%s]", module);
338 map = map_groups__find_by_name(&host_machine->kmaps, MAP__FUNCTION, module_name);
343 pr_debug("Failed to find module %s.\n", module);
347 map = machine__kernel_map(host_machine);
350 vmlinux_name = symbol_conf.vmlinux_name;
353 ret = dso__load_vmlinux(dso, map, vmlinux_name, false);
355 ret = dso__load_vmlinux_path(dso, map);
362 * Some binaries like glibc have special symbols which are on the symbol
363 * table, but not in the debuginfo. If we can find the address of the
364 * symbol from map, we can translate the address back to the probe point.
366 static int find_alternative_probe_point(struct debuginfo *dinfo,
367 struct perf_probe_point *pp,
368 struct perf_probe_point *result,
369 const char *target, bool uprobes)
371 struct map *map = NULL;
376 /* This can work only for function-name based one */
377 if (!pp->function || pp->file)
380 map = get_target_map(target, uprobes);
384 /* Find the address of given function */
385 map__for_each_symbol_by_name(map, pp->function, sym) {
387 address = sym->start;
389 address = map->unmap_ip(map, sym->start) - map->reloc;
396 pr_debug("Symbol %s address found : %" PRIx64 "\n",
397 pp->function, address);
399 ret = debuginfo__find_probe_point(dinfo, (unsigned long)address,
402 ret = (!ret) ? -ENOENT : ret;
404 result->offset += pp->offset;
405 result->line += pp->line;
406 result->retprobe = pp->retprobe;
416 static int get_alternative_probe_event(struct debuginfo *dinfo,
417 struct perf_probe_event *pev,
418 struct perf_probe_point *tmp)
422 memcpy(tmp, &pev->point, sizeof(*tmp));
423 memset(&pev->point, 0, sizeof(pev->point));
424 ret = find_alternative_probe_point(dinfo, tmp, &pev->point,
425 pev->target, pev->uprobes);
427 memcpy(&pev->point, tmp, sizeof(*tmp));
432 static int get_alternative_line_range(struct debuginfo *dinfo,
433 struct line_range *lr,
434 const char *target, bool user)
436 struct perf_probe_point pp = { .function = lr->function,
439 struct perf_probe_point result;
442 memset(&result, 0, sizeof(result));
444 if (lr->end != INT_MAX)
445 len = lr->end - lr->start;
446 ret = find_alternative_probe_point(dinfo, &pp, &result,
449 lr->function = result.function;
450 lr->file = result.file;
451 lr->start = result.line;
452 if (lr->end != INT_MAX)
453 lr->end = lr->start + len;
454 clear_perf_probe_point(&pp);
459 /* Open new debuginfo of given module */
460 static struct debuginfo *open_debuginfo(const char *module, bool silent)
462 const char *path = module;
463 char reason[STRERR_BUFSIZE];
464 struct debuginfo *ret = NULL;
465 struct dso *dso = NULL;
468 if (!module || !strchr(module, '/')) {
469 err = kernel_get_module_dso(module, &dso);
471 if (!dso || dso->load_errno == 0) {
472 if (!str_error_r(-err, reason, STRERR_BUFSIZE))
473 strcpy(reason, "(unknown)");
475 dso__strerror_load(dso, reason, STRERR_BUFSIZE);
477 pr_err("Failed to find the path for %s: %s\n",
478 module ?: "kernel", reason);
481 path = dso->long_name;
483 ret = debuginfo__new(path);
484 if (!ret && !silent) {
485 pr_warning("The %s file has no debug information.\n", path);
486 if (!module || !strtailcmp(path, ".ko"))
487 pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, ");
489 pr_warning("Rebuild with -g, ");
490 pr_warning("or install an appropriate debuginfo package.\n");
495 /* For caching the last debuginfo */
496 static struct debuginfo *debuginfo_cache;
497 static char *debuginfo_cache_path;
499 static struct debuginfo *debuginfo_cache__open(const char *module, bool silent)
501 const char *path = module;
503 /* If the module is NULL, it should be the kernel. */
507 if (debuginfo_cache_path && !strcmp(debuginfo_cache_path, path))
510 /* Copy module path */
511 free(debuginfo_cache_path);
512 debuginfo_cache_path = strdup(path);
513 if (!debuginfo_cache_path) {
514 debuginfo__delete(debuginfo_cache);
515 debuginfo_cache = NULL;
519 debuginfo_cache = open_debuginfo(module, silent);
520 if (!debuginfo_cache)
521 zfree(&debuginfo_cache_path);
523 return debuginfo_cache;
526 static void debuginfo_cache__exit(void)
528 debuginfo__delete(debuginfo_cache);
529 debuginfo_cache = NULL;
530 zfree(&debuginfo_cache_path);
534 static int get_text_start_address(const char *exec, unsigned long *address)
539 int fd, ret = -ENOENT;
541 fd = open(exec, O_RDONLY);
545 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
551 if (gelf_getehdr(elf, &ehdr) == NULL)
554 if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL))
557 *address = shdr.sh_addr - shdr.sh_offset;
568 * Convert trace point to probe point with debuginfo
570 static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
571 struct perf_probe_point *pp,
574 struct debuginfo *dinfo = NULL;
575 unsigned long stext = 0;
576 u64 addr = tp->address;
579 /* convert the address to dwarf address */
585 ret = get_text_start_address(tp->module, &stext);
589 } else if (tp->symbol) {
590 /* If the module is given, this returns relative address */
591 ret = kernel_get_symbol_address_by_name(tp->symbol, &addr,
592 false, !!tp->module);
598 pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
599 tp->module ? : "kernel");
601 dinfo = debuginfo_cache__open(tp->module, verbose <= 0);
603 ret = debuginfo__find_probe_point(dinfo,
604 (unsigned long)addr, pp);
609 pp->retprobe = tp->retprobe;
613 pr_debug("Failed to find corresponding probes from debuginfo.\n");
614 return ret ? : -ENOENT;
617 /* Adjust symbol name and address */
618 static int post_process_probe_trace_point(struct probe_trace_point *tp,
619 struct map *map, unsigned long offs)
622 u64 addr = tp->address - offs;
624 sym = map__find_symbol(map, addr);
628 if (strcmp(sym->name, tp->symbol)) {
629 /* If we have no realname, use symbol for it */
631 tp->realname = tp->symbol;
634 tp->symbol = strdup(sym->name);
638 tp->offset = addr - sym->start;
645 * Rename DWARF symbols to ELF symbols -- gcc sometimes optimizes functions
646 * and generate new symbols with suffixes such as .constprop.N or .isra.N
647 * etc. Since those symbols are not recorded in DWARF, we have to find
648 * correct generated symbols from offline ELF binary.
649 * For online kernel or uprobes we don't need this because those are
650 * rebased on _text, or already a section relative address.
653 post_process_offline_probe_trace_events(struct probe_trace_event *tevs,
654 int ntevs, const char *pathname)
657 unsigned long stext = 0;
660 /* Prepare a map for offline binary */
661 map = dso__new_map(pathname);
662 if (!map || get_text_start_address(pathname, &stext) < 0) {
663 pr_warning("Failed to get ELF symbols for %s\n", pathname);
667 for (i = 0; i < ntevs; i++) {
668 ret = post_process_probe_trace_point(&tevs[i].point,
678 static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
679 int ntevs, const char *exec)
682 unsigned long stext = 0;
687 ret = get_text_start_address(exec, &stext);
691 for (i = 0; i < ntevs && ret >= 0; i++) {
692 /* point.address is the addres of point.symbol + point.offset */
693 tevs[i].point.address -= stext;
694 tevs[i].point.module = strdup(exec);
695 if (!tevs[i].point.module) {
699 tevs[i].uprobes = true;
706 post_process_module_probe_trace_events(struct probe_trace_event *tevs,
707 int ntevs, const char *module,
708 struct debuginfo *dinfo)
710 Dwarf_Addr text_offs = 0;
712 char *mod_name = NULL;
718 map = get_target_map(module, false);
719 if (!map || debuginfo__get_text_offset(dinfo, &text_offs, true) < 0) {
720 pr_warning("Failed to get ELF symbols for %s\n", module);
724 mod_name = find_module_name(module);
725 for (i = 0; i < ntevs; i++) {
726 ret = post_process_probe_trace_point(&tevs[i].point,
727 map, (unsigned long)text_offs);
730 tevs[i].point.module =
731 strdup(mod_name ? mod_name : module);
732 if (!tevs[i].point.module) {
745 post_process_kernel_probe_trace_events(struct probe_trace_event *tevs,
748 struct ref_reloc_sym *reloc_sym;
752 /* Skip post process if the target is an offline kernel */
753 if (symbol_conf.ignore_vmlinux_buildid)
754 return post_process_offline_probe_trace_events(tevs, ntevs,
755 symbol_conf.vmlinux_name);
757 reloc_sym = kernel_get_ref_reloc_sym();
759 pr_warning("Relocated base symbol is not found!\n");
763 for (i = 0; i < ntevs; i++) {
764 if (!tevs[i].point.address)
766 if (tevs[i].point.retprobe && !kretprobe_offset_is_supported())
768 /* If we found a wrong one, mark it by NULL symbol */
769 if (kprobe_warn_out_range(tevs[i].point.symbol,
770 tevs[i].point.address)) {
774 tmp = strdup(reloc_sym->name);
778 /* If we have no realname, use symbol for it */
779 if (!tevs[i].point.realname)
780 tevs[i].point.realname = tevs[i].point.symbol;
782 free(tevs[i].point.symbol);
783 tevs[i].point.symbol = tmp;
784 tevs[i].point.offset = tevs[i].point.address -
785 reloc_sym->unrelocated_addr;
791 arch__post_process_probe_trace_events(struct perf_probe_event *pev __maybe_unused,
792 int ntevs __maybe_unused)
796 /* Post processing the probe events */
797 static int post_process_probe_trace_events(struct perf_probe_event *pev,
798 struct probe_trace_event *tevs,
799 int ntevs, const char *module,
800 bool uprobe, struct debuginfo *dinfo)
805 ret = add_exec_to_probe_trace_events(tevs, ntevs, module);
807 /* Currently ref_reloc_sym based probe is not for drivers */
808 ret = post_process_module_probe_trace_events(tevs, ntevs,
811 ret = post_process_kernel_probe_trace_events(tevs, ntevs);
814 arch__post_process_probe_trace_events(pev, ntevs);
819 /* Try to find perf_probe_event with debuginfo */
820 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
821 struct probe_trace_event **tevs)
823 bool need_dwarf = perf_probe_event_need_dwarf(pev);
824 struct perf_probe_point tmp;
825 struct debuginfo *dinfo;
828 dinfo = open_debuginfo(pev->target, !need_dwarf);
832 pr_debug("Could not open debuginfo. Try to use symbols.\n");
836 pr_debug("Try to find probe point from debuginfo.\n");
837 /* Searching trace events corresponding to a probe event */
838 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
840 if (ntevs == 0) { /* Not found, retry with an alternative */
841 ret = get_alternative_probe_event(dinfo, pev, &tmp);
843 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
845 * Write back to the original probe_event for
846 * setting appropriate (user given) event name
848 clear_perf_probe_point(&pev->point);
849 memcpy(&pev->point, &tmp, sizeof(tmp));
853 if (ntevs > 0) { /* Succeeded to find trace events */
854 pr_debug("Found %d probe_trace_events.\n", ntevs);
855 ret = post_process_probe_trace_events(pev, *tevs, ntevs,
856 pev->target, pev->uprobes, dinfo);
857 if (ret < 0 || ret == ntevs) {
858 pr_debug("Post processing failed or all events are skipped. (%d)\n", ret);
859 clear_probe_trace_events(*tevs, ntevs);
865 debuginfo__delete(dinfo);
867 if (ntevs == 0) { /* No error but failed to find probe point. */
868 pr_warning("Probe point '%s' not found.\n",
869 synthesize_perf_probe_point(&pev->point));
871 } else if (ntevs < 0) {
872 /* Error path : ntevs < 0 */
873 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
875 pr_warning("Warning: No dwarf info found in the vmlinux - "
876 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
878 pr_debug("Trying to use symbols.\n");
885 #define LINEBUF_SIZE 256
886 #define NR_ADDITIONAL_LINES 2
888 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
890 char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE];
891 const char *color = show_num ? "" : PERF_COLOR_BLUE;
892 const char *prefix = NULL;
895 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
900 prefix = show_num ? "%7d " : " ";
901 color_fprintf(stdout, color, prefix, l);
903 color_fprintf(stdout, color, "%s", buf);
905 } while (strchr(buf, '\n') == NULL);
910 pr_warning("File read error: %s\n",
911 str_error_r(errno, sbuf, sizeof(sbuf)));
917 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
919 int rv = __show_one_line(fp, l, skip, show_num);
921 pr_warning("Source file is shorter than expected.\n");
927 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
928 #define show_one_line(f,l) _show_one_line(f,l,false,false)
929 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
930 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
933 * Show line-range always requires debuginfo to find source file and
936 static int __show_line_range(struct line_range *lr, const char *module,
941 struct debuginfo *dinfo;
945 char sbuf[STRERR_BUFSIZE];
947 /* Search a line range */
948 dinfo = open_debuginfo(module, false);
952 ret = debuginfo__find_line_range(dinfo, lr);
953 if (!ret) { /* Not found, retry with an alternative */
954 ret = get_alternative_line_range(dinfo, lr, module, user);
956 ret = debuginfo__find_line_range(dinfo, lr);
958 debuginfo__delete(dinfo);
959 if (ret == 0 || ret == -ENOENT) {
960 pr_warning("Specified source line is not found.\n");
962 } else if (ret < 0) {
963 pr_warning("Debuginfo analysis failed.\n");
967 /* Convert source file path */
969 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
971 /* Free old path when new path is assigned */
976 pr_warning("Failed to find source file path.\n");
983 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
984 lr->start - lr->offset);
986 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
988 fp = fopen(lr->path, "r");
990 pr_warning("Failed to open %s: %s\n", lr->path,
991 str_error_r(errno, sbuf, sizeof(sbuf)));
994 /* Skip to starting line number */
995 while (l < lr->start) {
996 ret = skip_one_line(fp, l++);
1001 intlist__for_each_entry(ln, lr->line_list) {
1002 for (; ln->i > l; l++) {
1003 ret = show_one_line(fp, l - lr->offset);
1007 ret = show_one_line_with_num(fp, l++ - lr->offset);
1012 if (lr->end == INT_MAX)
1013 lr->end = l + NR_ADDITIONAL_LINES;
1014 while (l <= lr->end) {
1015 ret = show_one_line_or_eof(fp, l++ - lr->offset);
1024 int show_line_range(struct line_range *lr, const char *module, bool user)
1028 ret = init_probe_symbol_maps(user);
1031 ret = __show_line_range(lr, module, user);
1032 exit_probe_symbol_maps();
1037 static int show_available_vars_at(struct debuginfo *dinfo,
1038 struct perf_probe_event *pev,
1039 struct strfilter *_filter)
1043 struct str_node *node;
1044 struct variable_list *vls = NULL, *vl;
1045 struct perf_probe_point tmp;
1048 buf = synthesize_perf_probe_point(&pev->point);
1051 pr_debug("Searching variables at %s\n", buf);
1053 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls);
1054 if (!ret) { /* Not found, retry with an alternative */
1055 ret = get_alternative_probe_event(dinfo, pev, &tmp);
1057 ret = debuginfo__find_available_vars_at(dinfo, pev,
1059 /* Release the old probe_point */
1060 clear_perf_probe_point(&tmp);
1064 if (ret == 0 || ret == -ENOENT) {
1065 pr_err("Failed to find the address of %s\n", buf);
1068 pr_warning("Debuginfo analysis failed.\n");
1072 /* Some variables are found */
1073 fprintf(stdout, "Available variables at %s\n", buf);
1074 for (i = 0; i < ret; i++) {
1077 * A probe point might be converted to
1078 * several trace points.
1080 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
1082 zfree(&vl->point.symbol);
1085 strlist__for_each_entry(node, vl->vars) {
1086 var = strchr(node->s, '\t') + 1;
1087 if (strfilter__compare(_filter, var)) {
1088 fprintf(stdout, "\t\t%s\n", node->s);
1092 strlist__delete(vl->vars);
1095 fprintf(stdout, "\t\t(No matched variables)\n");
1103 /* Show available variables on given probe point */
1104 int show_available_vars(struct perf_probe_event *pevs, int npevs,
1105 struct strfilter *_filter)
1108 struct debuginfo *dinfo;
1110 ret = init_probe_symbol_maps(pevs->uprobes);
1114 dinfo = open_debuginfo(pevs->target, false);
1122 for (i = 0; i < npevs && ret >= 0; i++)
1123 ret = show_available_vars_at(dinfo, &pevs[i], _filter);
1125 debuginfo__delete(dinfo);
1127 exit_probe_symbol_maps();
1131 #else /* !HAVE_DWARF_SUPPORT */
1133 static void debuginfo_cache__exit(void)
1138 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
1139 struct perf_probe_point *pp __maybe_unused,
1140 bool is_kprobe __maybe_unused)
1145 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
1146 struct probe_trace_event **tevs __maybe_unused)
1148 if (perf_probe_event_need_dwarf(pev)) {
1149 pr_warning("Debuginfo-analysis is not supported.\n");
1156 int show_line_range(struct line_range *lr __maybe_unused,
1157 const char *module __maybe_unused,
1158 bool user __maybe_unused)
1160 pr_warning("Debuginfo-analysis is not supported.\n");
1164 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
1165 int npevs __maybe_unused,
1166 struct strfilter *filter __maybe_unused)
1168 pr_warning("Debuginfo-analysis is not supported.\n");
1173 void line_range__clear(struct line_range *lr)
1179 intlist__delete(lr->line_list);
1180 memset(lr, 0, sizeof(*lr));
1183 int line_range__init(struct line_range *lr)
1185 memset(lr, 0, sizeof(*lr));
1186 lr->line_list = intlist__new(NULL);
1193 static int parse_line_num(char **ptr, int *val, const char *what)
1195 const char *start = *ptr;
1198 *val = strtol(*ptr, ptr, 0);
1199 if (errno || *ptr == start) {
1200 semantic_error("'%s' is not a valid number.\n", what);
1206 /* Check the name is good for event, group or function */
1207 static bool is_c_func_name(const char *name)
1209 if (!isalpha(*name) && *name != '_')
1211 while (*++name != '\0') {
1212 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
1219 * Stuff 'lr' according to the line range described by 'arg'.
1220 * The line range syntax is described by:
1222 * SRC[:SLN[+NUM|-ELN]]
1223 * FNC[@SRC][:SLN[+NUM|-ELN]]
1225 int parse_line_range_desc(const char *arg, struct line_range *lr)
1227 char *range, *file, *name = strdup(arg);
1236 range = strchr(name, ':');
1240 err = parse_line_num(&range, &lr->start, "start line");
1244 if (*range == '+' || *range == '-') {
1245 const char c = *range++;
1247 err = parse_line_num(&range, &lr->end, "end line");
1252 lr->end += lr->start;
1254 * Adjust the number of lines here.
1255 * If the number of lines == 1, the
1256 * the end of line should be equal to
1257 * the start of line.
1263 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
1266 if (lr->start > lr->end) {
1267 semantic_error("Start line must be smaller"
1268 " than end line.\n");
1271 if (*range != '\0') {
1272 semantic_error("Tailing with invalid str '%s'.\n", range);
1277 file = strchr(name, '@');
1280 lr->file = strdup(++file);
1281 if (lr->file == NULL) {
1285 lr->function = name;
1286 } else if (strchr(name, '/') || strchr(name, '.'))
1288 else if (is_c_func_name(name))/* We reuse it for checking funcname */
1289 lr->function = name;
1290 else { /* Invalid name */
1291 semantic_error("'%s' is not a valid function name.\n", name);
1302 static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev)
1306 ptr = strchr(*arg, ':');
1309 if (!pev->sdt && !is_c_func_name(*arg))
1311 pev->group = strdup(*arg);
1317 if (!pev->sdt && !is_c_func_name(*arg)) {
1319 semantic_error("%s is bad for event name -it must "
1320 "follow C symbol-naming rule.\n", *arg);
1323 pev->event = strdup(*arg);
1324 if (pev->event == NULL)
1330 /* Parse probepoint definition. */
1331 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
1333 struct perf_probe_point *pp = &pev->point;
1336 bool file_spec = false;
1341 * perf probe [GRP:][EVENT=]SRC[:LN|;PTN]
1342 * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
1343 * perf probe %[GRP:]SDT_EVENT
1348 if (is_sdt_event(arg)) {
1354 ptr = strpbrk(arg, ";=@+%");
1358 semantic_error("%s must be an SDT name.\n",
1362 /* This must be a target file name or build id */
1363 tmp = build_id_cache__complement(ptr + 1);
1365 pev->target = build_id_cache__origname(tmp);
1368 pev->target = strdup(ptr + 1);
1373 ret = parse_perf_probe_event_name(&arg, pev);
1375 if (asprintf(&pev->point.function, "%%%s", pev->event) < 0)
1381 if (ptr && *ptr == '=') { /* Event name */
1384 ret = parse_perf_probe_event_name(&arg, pev);
1392 * Check arg is function or file name and copy it.
1394 * We consider arg to be a file spec if and only if it satisfies
1395 * all of the below criteria::
1396 * - it does not include any of "+@%",
1397 * - it includes one of ":;", and
1398 * - it has a period '.' in the name.
1400 * Otherwise, we consider arg to be a function specification.
1402 if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) {
1403 /* This is a file spec if it includes a '.' before ; or : */
1404 if (memchr(arg, '.', ptr - arg))
1408 ptr = strpbrk(arg, ";:+@%");
1428 * Keep pp->function even if this is absolute address,
1429 * so it can mark whether abs_address is valid.
1430 * Which make 'perf probe lib.bin 0x0' possible.
1432 * Note that checking length of tmp is not needed
1433 * because when we access tmp[1] we know tmp[0] is '0',
1434 * so tmp[1] should always valid (but could be '\0').
1436 if (tmp && !strncmp(tmp, "0x", 2)) {
1437 pp->abs_address = strtoul(pp->function, &tmp, 0);
1439 semantic_error("Invalid absolute address.\n");
1445 /* Parse other options */
1449 if (c == ';') { /* Lazy pattern must be the last part */
1450 pp->lazy_line = strdup(arg);
1451 if (pp->lazy_line == NULL)
1455 ptr = strpbrk(arg, ";:+@%");
1461 case ':': /* Line number */
1462 pp->line = strtoul(arg, &tmp, 0);
1464 semantic_error("There is non-digit char"
1465 " in line number.\n");
1469 case '+': /* Byte offset from a symbol */
1470 pp->offset = strtoul(arg, &tmp, 0);
1472 semantic_error("There is non-digit character"
1477 case '@': /* File name */
1479 semantic_error("SRC@SRC is not allowed.\n");
1482 pp->file = strdup(arg);
1483 if (pp->file == NULL)
1486 case '%': /* Probe places */
1487 if (strcmp(arg, "return") == 0) {
1489 } else { /* Others not supported yet */
1490 semantic_error("%%%s is not supported.\n", arg);
1494 default: /* Buggy case */
1495 pr_err("This program has a bug at %s:%d.\n",
1496 __FILE__, __LINE__);
1502 /* Exclusion check */
1503 if (pp->lazy_line && pp->line) {
1504 semantic_error("Lazy pattern can't be used with"
1509 if (pp->lazy_line && pp->offset) {
1510 semantic_error("Lazy pattern can't be used with offset.\n");
1514 if (pp->line && pp->offset) {
1515 semantic_error("Offset can't be used with line number.\n");
1519 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1520 semantic_error("File always requires line number or "
1525 if (pp->offset && !pp->function) {
1526 semantic_error("Offset requires an entry function.\n");
1530 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1531 semantic_error("Offset/Line/Lazy pattern can't be used with "
1536 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1537 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1542 /* Parse perf-probe event argument */
1543 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1545 char *tmp, *goodname;
1546 struct perf_probe_arg_field **fieldp;
1548 pr_debug("parsing arg: %s into ", str);
1550 tmp = strchr(str, '=');
1552 arg->name = strndup(str, tmp - str);
1553 if (arg->name == NULL)
1555 pr_debug("name:%s ", arg->name);
1559 tmp = strchr(str, ':');
1560 if (tmp) { /* Type setting */
1562 arg->type = strdup(tmp + 1);
1563 if (arg->type == NULL)
1565 pr_debug("type:%s ", arg->type);
1568 tmp = strpbrk(str, "-.[");
1569 if (!is_c_varname(str) || !tmp) {
1570 /* A variable, register, symbol or special value */
1571 arg->var = strdup(str);
1572 if (arg->var == NULL)
1574 pr_debug("%s\n", arg->var);
1578 /* Structure fields or array element */
1579 arg->var = strndup(str, tmp - str);
1580 if (arg->var == NULL)
1582 goodname = arg->var;
1583 pr_debug("%s, ", arg->var);
1584 fieldp = &arg->field;
1587 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1588 if (*fieldp == NULL)
1590 if (*tmp == '[') { /* Array */
1592 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1593 (*fieldp)->ref = true;
1594 if (*tmp != ']' || tmp == str + 1) {
1595 semantic_error("Array index must be a"
1602 } else { /* Structure */
1605 (*fieldp)->ref = false;
1606 } else if (tmp[1] == '>') {
1608 (*fieldp)->ref = true;
1610 semantic_error("Argument parse error: %s\n",
1614 tmp = strpbrk(str, "-.[");
1617 (*fieldp)->name = strndup(str, tmp - str);
1618 if ((*fieldp)->name == NULL)
1621 goodname = (*fieldp)->name;
1622 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1623 fieldp = &(*fieldp)->next;
1626 (*fieldp)->name = strdup(str);
1627 if ((*fieldp)->name == NULL)
1630 goodname = (*fieldp)->name;
1631 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1633 /* If no name is specified, set the last field name (not array index)*/
1635 arg->name = strdup(goodname);
1636 if (arg->name == NULL)
1642 /* Parse perf-probe event command */
1643 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1646 int argc, i, ret = 0;
1648 argv = argv_split(cmd, &argc);
1650 pr_debug("Failed to split arguments.\n");
1653 if (argc - 1 > MAX_PROBE_ARGS) {
1654 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1658 /* Parse probe point */
1659 ret = parse_perf_probe_point(argv[0], pev);
1663 /* Copy arguments and ensure return probe has no C argument */
1664 pev->nargs = argc - 1;
1665 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1666 if (pev->args == NULL) {
1670 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1671 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1673 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1674 semantic_error("You can't specify local variable for"
1685 /* Returns true if *any* ARG is either C variable, $params or $vars. */
1686 bool perf_probe_with_var(struct perf_probe_event *pev)
1690 for (i = 0; i < pev->nargs; i++)
1691 if (is_c_varname(pev->args[i].var) ||
1692 !strcmp(pev->args[i].var, PROBE_ARG_PARAMS) ||
1693 !strcmp(pev->args[i].var, PROBE_ARG_VARS))
1698 /* Return true if this perf_probe_event requires debuginfo */
1699 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1701 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1704 if (perf_probe_with_var(pev))
1710 /* Parse probe_events event into struct probe_point */
1711 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev)
1713 struct probe_trace_point *tp = &tev->point;
1716 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1720 pr_debug("Parsing probe_events: %s\n", cmd);
1721 argv = argv_split(cmd, &argc);
1723 pr_debug("Failed to split arguments.\n");
1727 semantic_error("Too few probe arguments.\n");
1732 /* Scan event and group name. */
1733 argv0_str = strdup(argv[0]);
1734 if (argv0_str == NULL) {
1738 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1739 fmt2_str = strtok_r(NULL, "/", &fmt);
1740 fmt3_str = strtok_r(NULL, " \t", &fmt);
1741 if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
1742 || fmt3_str == NULL) {
1743 semantic_error("Failed to parse event name: %s\n", argv[0]);
1748 tev->group = strdup(fmt2_str);
1749 tev->event = strdup(fmt3_str);
1750 if (tev->group == NULL || tev->event == NULL) {
1754 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1756 tp->retprobe = (pr == 'r');
1758 /* Scan module name(if there), function name and offset */
1759 p = strchr(argv[1], ':');
1761 tp->module = strndup(argv[1], p - argv[1]);
1766 tev->uprobes = (tp->module[0] == '/');
1770 fmt1_str = strtok_r(p, "+", &fmt);
1771 /* only the address started with 0x */
1772 if (fmt1_str[0] == '0') {
1774 * Fix a special case:
1775 * if address == 0, kernel reports something like:
1776 * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax
1777 * Newer kernel may fix that, but we want to
1778 * support old kernel also.
1780 if (strcmp(fmt1_str, "0x") == 0) {
1781 if (!argv[2] || strcmp(argv[2], "(null)")) {
1788 for (i = 2; argv[i + 1] != NULL; i++)
1789 argv[i] = argv[i + 1];
1794 tp->address = strtoul(fmt1_str, NULL, 0);
1796 /* Only the symbol-based probe has offset */
1797 tp->symbol = strdup(fmt1_str);
1798 if (tp->symbol == NULL) {
1802 fmt2_str = strtok_r(NULL, "", &fmt);
1803 if (fmt2_str == NULL)
1806 tp->offset = strtoul(fmt2_str, NULL, 10);
1809 tev->nargs = argc - 2;
1810 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1811 if (tev->args == NULL) {
1815 for (i = 0; i < tev->nargs; i++) {
1816 p = strchr(argv[i + 2], '=');
1817 if (p) /* We don't need which register is assigned. */
1821 tev->args[i].name = strdup(argv[i + 2]);
1822 /* TODO: parse regs and offset */
1823 tev->args[i].value = strdup(p);
1824 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1836 /* Compose only probe arg */
1837 char *synthesize_perf_probe_arg(struct perf_probe_arg *pa)
1839 struct perf_probe_arg_field *field = pa->field;
1844 if (strbuf_init(&buf, 64) < 0)
1847 if (pa->name && pa->var)
1848 err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var);
1850 err = strbuf_addstr(&buf, pa->name ?: pa->var);
1855 if (field->name[0] == '[')
1856 err = strbuf_addstr(&buf, field->name);
1858 err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".",
1860 field = field->next;
1866 if (strbuf_addf(&buf, ":%s", pa->type) < 0)
1869 ret = strbuf_detach(&buf, NULL);
1871 strbuf_release(&buf);
1875 /* Compose only probe point (not argument) */
1876 char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1879 char *tmp, *ret = NULL;
1882 if (strbuf_init(&buf, 64) < 0)
1886 if (strbuf_addstr(&buf, pp->function) < 0)
1889 err = strbuf_addf(&buf, "+%lu", pp->offset);
1891 err = strbuf_addf(&buf, ":%d", pp->line);
1892 else if (pp->retprobe)
1893 err = strbuf_addstr(&buf, "%return");
1901 tmp = strchr(pp->file + len - 30, '/');
1902 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1904 err = strbuf_addf(&buf, "@%s", tmp);
1905 if (!err && !pp->function && pp->line)
1906 err = strbuf_addf(&buf, ":%d", pp->line);
1909 ret = strbuf_detach(&buf, NULL);
1911 strbuf_release(&buf);
1915 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1918 char *tmp, *ret = NULL;
1921 if (strbuf_init(&buf, 64))
1924 if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP,
1928 tmp = synthesize_perf_probe_point(&pev->point);
1929 if (!tmp || strbuf_addstr(&buf, tmp) < 0)
1933 for (i = 0; i < pev->nargs; i++) {
1934 tmp = synthesize_perf_probe_arg(pev->args + i);
1935 if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0)
1940 ret = strbuf_detach(&buf, NULL);
1942 strbuf_release(&buf);
1946 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1947 struct strbuf *buf, int depth)
1951 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1956 err = strbuf_addf(buf, "%+ld(", ref->offset);
1957 return (err < 0) ? err : depth;
1960 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1963 struct probe_trace_arg_ref *ref = arg->ref;
1966 /* Argument name or separator */
1968 err = strbuf_addf(buf, " %s=", arg->name);
1970 err = strbuf_addch(buf, ' ');
1974 /* Special case: @XXX */
1975 if (arg->value[0] == '@' && arg->ref)
1978 /* Dereferencing arguments */
1980 depth = __synthesize_probe_trace_arg_ref(ref, buf, 1);
1985 /* Print argument value */
1986 if (arg->value[0] == '@' && arg->ref)
1987 err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset);
1989 err = strbuf_addstr(buf, arg->value);
1992 while (!err && depth--)
1993 err = strbuf_addch(buf, ')');
1995 /* Print argument type */
1996 if (!err && arg->type)
1997 err = strbuf_addf(buf, ":%s", arg->type);
2002 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
2004 struct probe_trace_point *tp = &tev->point;
2009 /* Uprobes must have tp->module */
2010 if (tev->uprobes && !tp->module)
2013 if (strbuf_init(&buf, 32) < 0)
2016 if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
2017 tev->group, tev->event) < 0)
2020 * If tp->address == 0, then this point must be a
2021 * absolute address uprobe.
2022 * try_to_find_absolute_address() should have made
2023 * tp->symbol to "0x0".
2025 if (tev->uprobes && !tp->address) {
2026 if (!tp->symbol || strcmp(tp->symbol, "0x0"))
2030 /* Use the tp->address for uprobes */
2032 err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address);
2033 else if (!strncmp(tp->symbol, "0x", 2))
2034 /* Absolute address. See try_to_find_absolute_address() */
2035 err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "",
2036 tp->module ? ":" : "", tp->address);
2038 err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "",
2039 tp->module ? ":" : "", tp->symbol, tp->offset);
2043 for (i = 0; i < tev->nargs; i++)
2044 if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0)
2047 ret = strbuf_detach(&buf, NULL);
2049 strbuf_release(&buf);
2053 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
2054 struct perf_probe_point *pp,
2057 struct symbol *sym = NULL;
2058 struct map *map = NULL;
2059 u64 addr = tp->address;
2063 map = dso__new_map(tp->module);
2066 sym = map__find_symbol(map, addr);
2068 if (tp->symbol && !addr) {
2069 if (kernel_get_symbol_address_by_name(tp->symbol,
2070 &addr, true, false) < 0)
2075 sym = __find_kernel_function(addr, &map);
2082 pp->retprobe = tp->retprobe;
2083 pp->offset = addr - map->unmap_ip(map, sym->start);
2084 pp->function = strdup(sym->name);
2085 ret = pp->function ? 0 : -ENOMEM;
2088 if (map && !is_kprobe) {
2095 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
2096 struct perf_probe_point *pp,
2102 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
2105 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
2109 pr_debug("Failed to find probe point from both of dwarf and map.\n");
2112 pp->function = strdup(tp->symbol);
2113 pp->offset = tp->offset;
2115 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
2118 pp->function = strdup(buf);
2121 if (pp->function == NULL)
2124 pp->retprobe = tp->retprobe;
2129 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
2130 struct perf_probe_event *pev, bool is_kprobe)
2132 struct strbuf buf = STRBUF_INIT;
2135 /* Convert event/group name */
2136 pev->event = strdup(tev->event);
2137 pev->group = strdup(tev->group);
2138 if (pev->event == NULL || pev->group == NULL)
2141 /* Convert trace_point to probe_point */
2142 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
2146 /* Convert trace_arg to probe_arg */
2147 pev->nargs = tev->nargs;
2148 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
2149 if (pev->args == NULL)
2151 for (i = 0; i < tev->nargs && ret >= 0; i++) {
2152 if (tev->args[i].name)
2153 pev->args[i].name = strdup(tev->args[i].name);
2155 if ((ret = strbuf_init(&buf, 32)) < 0)
2157 ret = synthesize_probe_trace_arg(&tev->args[i], &buf);
2158 pev->args[i].name = strbuf_detach(&buf, NULL);
2160 if (pev->args[i].name == NULL && ret >= 0)
2165 clear_perf_probe_event(pev);
2170 void clear_perf_probe_event(struct perf_probe_event *pev)
2172 struct perf_probe_arg_field *field, *next;
2178 clear_perf_probe_point(&pev->point);
2180 for (i = 0; i < pev->nargs; i++) {
2181 free(pev->args[i].name);
2182 free(pev->args[i].var);
2183 free(pev->args[i].type);
2184 field = pev->args[i].field;
2187 zfree(&field->name);
2193 memset(pev, 0, sizeof(*pev));
2196 #define strdup_or_goto(str, label) \
2197 ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; })
2199 static int perf_probe_point__copy(struct perf_probe_point *dst,
2200 struct perf_probe_point *src)
2202 dst->file = strdup_or_goto(src->file, out_err);
2203 dst->function = strdup_or_goto(src->function, out_err);
2204 dst->lazy_line = strdup_or_goto(src->lazy_line, out_err);
2205 dst->line = src->line;
2206 dst->retprobe = src->retprobe;
2207 dst->offset = src->offset;
2211 clear_perf_probe_point(dst);
2215 static int perf_probe_arg__copy(struct perf_probe_arg *dst,
2216 struct perf_probe_arg *src)
2218 struct perf_probe_arg_field *field, **ppfield;
2220 dst->name = strdup_or_goto(src->name, out_err);
2221 dst->var = strdup_or_goto(src->var, out_err);
2222 dst->type = strdup_or_goto(src->type, out_err);
2225 ppfield = &(dst->field);
2227 *ppfield = zalloc(sizeof(*field));
2230 (*ppfield)->name = strdup_or_goto(field->name, out_err);
2231 (*ppfield)->index = field->index;
2232 (*ppfield)->ref = field->ref;
2233 field = field->next;
2234 ppfield = &((*ppfield)->next);
2241 int perf_probe_event__copy(struct perf_probe_event *dst,
2242 struct perf_probe_event *src)
2246 dst->event = strdup_or_goto(src->event, out_err);
2247 dst->group = strdup_or_goto(src->group, out_err);
2248 dst->target = strdup_or_goto(src->target, out_err);
2249 dst->uprobes = src->uprobes;
2251 if (perf_probe_point__copy(&dst->point, &src->point) < 0)
2254 dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs);
2257 dst->nargs = src->nargs;
2259 for (i = 0; i < src->nargs; i++)
2260 if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0)
2265 clear_perf_probe_event(dst);
2269 void clear_probe_trace_event(struct probe_trace_event *tev)
2271 struct probe_trace_arg_ref *ref, *next;
2276 free(tev->point.symbol);
2277 free(tev->point.realname);
2278 free(tev->point.module);
2279 for (i = 0; i < tev->nargs; i++) {
2280 free(tev->args[i].name);
2281 free(tev->args[i].value);
2282 free(tev->args[i].type);
2283 ref = tev->args[i].ref;
2291 memset(tev, 0, sizeof(*tev));
2294 struct kprobe_blacklist_node {
2295 struct list_head list;
2296 unsigned long start;
2301 static void kprobe_blacklist__delete(struct list_head *blacklist)
2303 struct kprobe_blacklist_node *node;
2305 while (!list_empty(blacklist)) {
2306 node = list_first_entry(blacklist,
2307 struct kprobe_blacklist_node, list);
2308 list_del(&node->list);
2314 static int kprobe_blacklist__load(struct list_head *blacklist)
2316 struct kprobe_blacklist_node *node;
2317 const char *__debugfs = debugfs__mountpoint();
2318 char buf[PATH_MAX], *p;
2322 if (__debugfs == NULL)
2325 ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs);
2329 fp = fopen(buf, "r");
2334 while (fgets(buf, PATH_MAX, fp)) {
2335 node = zalloc(sizeof(*node));
2340 INIT_LIST_HEAD(&node->list);
2341 list_add_tail(&node->list, blacklist);
2342 if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) {
2346 p = strchr(buf, '\t');
2349 if (p[strlen(p) - 1] == '\n')
2350 p[strlen(p) - 1] = '\0';
2352 p = (char *)"unknown";
2353 node->symbol = strdup(p);
2354 if (!node->symbol) {
2358 pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n",
2359 node->start, node->end, node->symbol);
2363 kprobe_blacklist__delete(blacklist);
2369 static struct kprobe_blacklist_node *
2370 kprobe_blacklist__find_by_address(struct list_head *blacklist,
2371 unsigned long address)
2373 struct kprobe_blacklist_node *node;
2375 list_for_each_entry(node, blacklist, list) {
2376 if (node->start <= address && address <= node->end)
2383 static LIST_HEAD(kprobe_blacklist);
2385 static void kprobe_blacklist__init(void)
2387 if (!list_empty(&kprobe_blacklist))
2390 if (kprobe_blacklist__load(&kprobe_blacklist) < 0)
2391 pr_debug("No kprobe blacklist support, ignored\n");
2394 static void kprobe_blacklist__release(void)
2396 kprobe_blacklist__delete(&kprobe_blacklist);
2399 static bool kprobe_blacklist__listed(unsigned long address)
2401 return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address);
2404 static int perf_probe_event__sprintf(const char *group, const char *event,
2405 struct perf_probe_event *pev,
2407 struct strbuf *result)
2412 if (asprintf(&buf, "%s:%s", group, event) < 0)
2414 ret = strbuf_addf(result, " %-20s (on ", buf);
2419 /* Synthesize only event probe point */
2420 buf = synthesize_perf_probe_point(&pev->point);
2423 ret = strbuf_addstr(result, buf);
2427 ret = strbuf_addf(result, " in %s", module);
2429 if (!ret && pev->nargs > 0) {
2430 ret = strbuf_add(result, " with", 5);
2431 for (i = 0; !ret && i < pev->nargs; i++) {
2432 buf = synthesize_perf_probe_arg(&pev->args[i]);
2435 ret = strbuf_addf(result, " %s", buf);
2440 ret = strbuf_addch(result, ')');
2446 int show_perf_probe_event(const char *group, const char *event,
2447 struct perf_probe_event *pev,
2448 const char *module, bool use_stdout)
2450 struct strbuf buf = STRBUF_INIT;
2453 ret = perf_probe_event__sprintf(group, event, pev, module, &buf);
2456 printf("%s\n", buf.buf);
2458 pr_info("%s\n", buf.buf);
2460 strbuf_release(&buf);
2465 static bool filter_probe_trace_event(struct probe_trace_event *tev,
2466 struct strfilter *filter)
2470 /* At first, check the event name itself */
2471 if (strfilter__compare(filter, tev->event))
2474 /* Next, check the combination of name and group */
2475 if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0)
2477 return strfilter__compare(filter, tmp);
2480 static int __show_perf_probe_events(int fd, bool is_kprobe,
2481 struct strfilter *filter)
2484 struct probe_trace_event tev;
2485 struct perf_probe_event pev;
2486 struct strlist *rawlist;
2487 struct str_node *ent;
2489 memset(&tev, 0, sizeof(tev));
2490 memset(&pev, 0, sizeof(pev));
2492 rawlist = probe_file__get_rawlist(fd);
2496 strlist__for_each_entry(ent, rawlist) {
2497 ret = parse_probe_trace_command(ent->s, &tev);
2499 if (!filter_probe_trace_event(&tev, filter))
2501 ret = convert_to_perf_probe_event(&tev, &pev,
2505 ret = show_perf_probe_event(pev.group, pev.event,
2506 &pev, tev.point.module,
2510 clear_perf_probe_event(&pev);
2511 clear_probe_trace_event(&tev);
2515 strlist__delete(rawlist);
2516 /* Cleanup cached debuginfo if needed */
2517 debuginfo_cache__exit();
2522 /* List up current perf-probe events */
2523 int show_perf_probe_events(struct strfilter *filter)
2525 int kp_fd, up_fd, ret;
2529 if (probe_conf.cache)
2530 return probe_cache__show_all_caches(filter);
2532 ret = init_probe_symbol_maps(false);
2536 ret = probe_file__open_both(&kp_fd, &up_fd, 0);
2541 ret = __show_perf_probe_events(kp_fd, true, filter);
2542 if (up_fd >= 0 && ret >= 0)
2543 ret = __show_perf_probe_events(up_fd, false, filter);
2548 exit_probe_symbol_maps();
2553 static int get_new_event_name(char *buf, size_t len, const char *base,
2554 struct strlist *namelist, bool allow_suffix)
2561 nbase = strdup(base);
2565 /* Cut off the dot suffixes (e.g. .const, .isra)*/
2566 p = strchr(nbase, '.');
2567 if (p && p != nbase)
2570 /* Try no suffix number */
2571 ret = e_snprintf(buf, len, "%s", nbase);
2573 pr_debug("snprintf() failed: %d\n", ret);
2576 if (!strlist__has_entry(namelist, buf))
2579 if (!allow_suffix) {
2580 pr_warning("Error: event \"%s\" already exists.\n"
2581 " Hint: Remove existing event by 'perf probe -d'\n"
2582 " or force duplicates by 'perf probe -f'\n"
2583 " or set 'force=yes' in BPF source.\n",
2589 /* Try to add suffix */
2590 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2591 ret = e_snprintf(buf, len, "%s_%d", nbase, i);
2593 pr_debug("snprintf() failed: %d\n", ret);
2596 if (!strlist__has_entry(namelist, buf))
2599 if (i == MAX_EVENT_INDEX) {
2600 pr_warning("Too many events are on the same function.\n");
2609 /* Warn if the current kernel's uprobe implementation is old */
2610 static void warn_uprobe_event_compat(struct probe_trace_event *tev)
2613 char *buf = synthesize_probe_trace_command(tev);
2615 /* Old uprobe event doesn't support memory dereference */
2616 if (!tev->uprobes || tev->nargs == 0 || !buf)
2619 for (i = 0; i < tev->nargs; i++)
2620 if (strglobmatch(tev->args[i].value, "[$@+-]*")) {
2621 pr_warning("Please upgrade your kernel to at least "
2622 "3.14 to have access to feature %s\n",
2623 tev->args[i].value);
2630 /* Set new name from original perf_probe_event and namelist */
2631 static int probe_trace_event__set_name(struct probe_trace_event *tev,
2632 struct perf_probe_event *pev,
2633 struct strlist *namelist,
2636 const char *event, *group;
2640 /* If probe_event or trace_event already have the name, reuse it */
2641 if (pev->event && !pev->sdt)
2643 else if (tev->event)
2646 /* Or generate new one from probe point */
2647 if (pev->point.function &&
2648 (strncmp(pev->point.function, "0x", 2) != 0) &&
2649 !strisglob(pev->point.function))
2650 event = pev->point.function;
2652 event = tev->point.realname;
2654 if (pev->group && !pev->sdt)
2656 else if (tev->group)
2659 group = PERFPROBE_GROUP;
2661 /* Get an unused new event name */
2662 ret = get_new_event_name(buf, 64, event,
2663 namelist, allow_suffix);
2669 tev->event = strdup(event);
2670 tev->group = strdup(group);
2671 if (tev->event == NULL || tev->group == NULL)
2674 /* Add added event name to namelist */
2675 strlist__add(namelist, event);
2679 static int __open_probe_file_and_namelist(bool uprobe,
2680 struct strlist **namelist)
2684 fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0));
2688 /* Get current event names */
2689 *namelist = probe_file__get_namelist(fd);
2691 pr_debug("Failed to get current event list.\n");
2698 static int __add_probe_trace_events(struct perf_probe_event *pev,
2699 struct probe_trace_event *tevs,
2700 int ntevs, bool allow_suffix)
2702 int i, fd[2] = {-1, -1}, up, ret;
2703 struct probe_trace_event *tev = NULL;
2704 struct probe_cache *cache = NULL;
2705 struct strlist *namelist[2] = {NULL, NULL};
2707 up = pev->uprobes ? 1 : 0;
2708 fd[up] = __open_probe_file_and_namelist(up, &namelist[up]);
2713 for (i = 0; i < ntevs; i++) {
2715 up = tev->uprobes ? 1 : 0;
2716 if (fd[up] == -1) { /* Open the kprobe/uprobe_events */
2717 fd[up] = __open_probe_file_and_namelist(up,
2722 /* Skip if the symbol is out of .text or blacklisted */
2723 if (!tev->point.symbol && !pev->uprobes)
2726 /* Set new name for tev (and update namelist) */
2727 ret = probe_trace_event__set_name(tev, pev, namelist[up],
2732 ret = probe_file__add_event(fd[up], tev);
2737 * Probes after the first probe which comes from same
2738 * user input are always allowed to add suffix, because
2739 * there might be several addresses corresponding to
2742 allow_suffix = true;
2744 if (ret == -EINVAL && pev->uprobes)
2745 warn_uprobe_event_compat(tev);
2746 if (ret == 0 && probe_conf.cache) {
2747 cache = probe_cache__new(pev->target);
2749 probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 ||
2750 probe_cache__commit(cache) < 0)
2751 pr_warning("Failed to add event to probe cache\n");
2752 probe_cache__delete(cache);
2756 for (up = 0; up < 2; up++) {
2757 strlist__delete(namelist[up]);
2764 static int find_probe_functions(struct map *map, char *name,
2765 struct symbol **syms)
2769 struct rb_node *tmp;
2771 if (map__load(map) < 0)
2774 map__for_each_symbol(map, sym, tmp) {
2775 if (strglobmatch(sym->name, name)) {
2777 if (syms && found < probe_conf.max_probes)
2778 syms[found - 1] = sym;
2785 void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused,
2786 struct probe_trace_event *tev __maybe_unused,
2787 struct map *map __maybe_unused,
2788 struct symbol *sym __maybe_unused) { }
2791 * Find probe function addresses from map.
2792 * Return an error or the number of found probe_trace_event
2794 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2795 struct probe_trace_event **tevs)
2797 struct map *map = NULL;
2798 struct ref_reloc_sym *reloc_sym = NULL;
2800 struct symbol **syms = NULL;
2801 struct probe_trace_event *tev;
2802 struct perf_probe_point *pp = &pev->point;
2803 struct probe_trace_point *tp;
2804 int num_matched_functions;
2805 int ret, i, j, skipped = 0;
2808 map = get_target_map(pev->target, pev->uprobes);
2814 syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes);
2821 * Load matched symbols: Since the different local symbols may have
2822 * same name but different addresses, this lists all the symbols.
2824 num_matched_functions = find_probe_functions(map, pp->function, syms);
2825 if (num_matched_functions == 0) {
2826 pr_err("Failed to find symbol %s in %s\n", pp->function,
2827 pev->target ? : "kernel");
2830 } else if (num_matched_functions > probe_conf.max_probes) {
2831 pr_err("Too many functions matched in %s\n",
2832 pev->target ? : "kernel");
2837 /* Note that the symbols in the kmodule are not relocated */
2838 if (!pev->uprobes && !pev->target &&
2839 (!pp->retprobe || kretprobe_offset_is_supported())) {
2840 reloc_sym = kernel_get_ref_reloc_sym();
2842 pr_warning("Relocated base symbol is not found!\n");
2848 /* Setup result trace-probe-events */
2849 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2857 for (j = 0; j < num_matched_functions; j++) {
2860 tev = (*tevs) + ret;
2862 if (ret == num_matched_functions) {
2863 pr_warning("Too many symbols are listed. Skip it.\n");
2868 if (pp->offset > sym->end - sym->start) {
2869 pr_warning("Offset %ld is bigger than the size of %s\n",
2870 pp->offset, sym->name);
2874 /* Add one probe point */
2875 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2877 /* Check the kprobe (not in module) is within .text */
2878 if (!pev->uprobes && !pev->target &&
2879 kprobe_warn_out_range(sym->name, tp->address)) {
2880 tp->symbol = NULL; /* Skip it */
2882 } else if (reloc_sym) {
2883 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2884 tp->offset = tp->address - reloc_sym->addr;
2886 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2887 tp->offset = pp->offset;
2889 tp->realname = strdup_or_goto(sym->name, nomem_out);
2891 tp->retprobe = pp->retprobe;
2894 tev->point.module = strdup_or_goto(pev->target,
2897 mod_name = find_module_name(pev->target);
2899 strdup(mod_name ? mod_name : pev->target);
2901 if (!tev->point.module)
2905 tev->uprobes = pev->uprobes;
2906 tev->nargs = pev->nargs;
2908 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2910 if (tev->args == NULL)
2913 for (i = 0; i < tev->nargs; i++) {
2914 if (pev->args[i].name)
2916 strdup_or_goto(pev->args[i].name,
2919 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2921 if (pev->args[i].type)
2923 strdup_or_goto(pev->args[i].type,
2926 arch__fix_tev_from_maps(pev, tev, map, sym);
2928 if (ret == skipped) {
2941 clear_probe_trace_events(*tevs, num_matched_functions);
2946 static int try_to_find_absolute_address(struct perf_probe_event *pev,
2947 struct probe_trace_event **tevs)
2949 struct perf_probe_point *pp = &pev->point;
2950 struct probe_trace_event *tev;
2951 struct probe_trace_point *tp;
2954 if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2)))
2956 if (perf_probe_event_need_dwarf(pev))
2960 * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at
2963 * Only one tev can be generated by this.
2965 *tevs = zalloc(sizeof(*tev));
2973 * Don't use tp->offset, use address directly, because
2974 * in synthesize_probe_trace_command() address cannot be
2977 tp->address = pev->point.abs_address;
2978 tp->retprobe = pp->retprobe;
2979 tev->uprobes = pev->uprobes;
2983 * Give it a '0x' leading symbol name.
2984 * In __add_probe_trace_events, a NULL symbol is interpreted as
2987 if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0)
2990 /* For kprobe, check range */
2991 if ((!tev->uprobes) &&
2992 (kprobe_warn_out_range(tev->point.symbol,
2993 tev->point.address))) {
2998 if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0)
3002 tp->module = strdup(pev->target);
3008 tev->group = strdup(pev->group);
3014 tev->event = strdup(pev->event);
3019 tev->nargs = pev->nargs;
3020 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
3024 for (i = 0; i < tev->nargs; i++)
3025 copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]);
3030 clear_probe_trace_events(*tevs, 1);
3035 /* Concatinate two arrays */
3036 static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b)
3040 ret = malloc(sz_a + sz_b);
3042 memcpy(ret, a, sz_a);
3043 memcpy(ret + sz_a, b, sz_b);
3049 concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs,
3050 struct probe_trace_event **tevs2, int ntevs2)
3052 struct probe_trace_event *new_tevs;
3062 if (*ntevs + ntevs2 > probe_conf.max_probes)
3065 /* Concatinate the array of probe_trace_event */
3066 new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs),
3067 *tevs2, ntevs2 * sizeof(**tevs2));
3077 clear_probe_trace_events(*tevs2, ntevs2);
3084 * Try to find probe_trace_event from given probe caches. Return the number
3085 * of cached events found, if an error occurs return the error.
3087 static int find_cached_events(struct perf_probe_event *pev,
3088 struct probe_trace_event **tevs,
3091 struct probe_cache *cache;
3092 struct probe_cache_entry *entry;
3093 struct probe_trace_event *tmp_tevs = NULL;
3097 cache = probe_cache__new(target);
3098 /* Return 0 ("not found") if the target has no probe cache. */
3102 for_each_probe_cache_entry(entry, cache) {
3103 /* Skip the cache entry which has no name */
3104 if (!entry->pev.event || !entry->pev.group)
3106 if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) &&
3107 strglobmatch(entry->pev.event, pev->event)) {
3108 ret = probe_cache_entry__get_event(entry, &tmp_tevs);
3110 ret = concat_probe_trace_events(tevs, &ntevs,
3116 probe_cache__delete(cache);
3118 clear_probe_trace_events(*tevs, ntevs);
3122 if (ntevs > 0 && target && target[0] == '/')
3123 pev->uprobes = true;
3129 /* Try to find probe_trace_event from all probe caches */
3130 static int find_cached_events_all(struct perf_probe_event *pev,
3131 struct probe_trace_event **tevs)
3133 struct probe_trace_event *tmp_tevs = NULL;
3134 struct strlist *bidlist;
3135 struct str_node *nd;
3140 /* Get the buildid list of all valid caches */
3141 bidlist = build_id_cache__list_all(true);
3144 pr_debug("Failed to get buildids: %d\n", ret);
3149 strlist__for_each_entry(nd, bidlist) {
3150 pathname = build_id_cache__origname(nd->s);
3151 ret = find_cached_events(pev, &tmp_tevs, pathname);
3152 /* In the case of cnt == 0, we just skip it */
3154 ret = concat_probe_trace_events(tevs, &ntevs,
3160 strlist__delete(bidlist);
3163 clear_probe_trace_events(*tevs, ntevs);
3171 static int find_probe_trace_events_from_cache(struct perf_probe_event *pev,
3172 struct probe_trace_event **tevs)
3174 struct probe_cache *cache;
3175 struct probe_cache_entry *entry;
3176 struct probe_trace_event *tev;
3177 struct str_node *node;
3181 /* For SDT/cached events, we use special search functions */
3183 return find_cached_events_all(pev, tevs);
3185 return find_cached_events(pev, tevs, pev->target);
3187 cache = probe_cache__new(pev->target);
3191 entry = probe_cache__find(cache, pev);
3193 /* SDT must be in the cache */
3194 ret = pev->sdt ? -ENOENT : 0;
3198 ret = strlist__nr_entries(entry->tevlist);
3199 if (ret > probe_conf.max_probes) {
3200 pr_debug("Too many entries matched in the cache of %s\n",
3201 pev->target ? : "kernel");
3206 *tevs = zalloc(ret * sizeof(*tev));
3213 strlist__for_each_entry(node, entry->tevlist) {
3214 tev = &(*tevs)[i++];
3215 ret = parse_probe_trace_command(node->s, tev);
3218 /* Set the uprobes attribute as same as original */
3219 tev->uprobes = pev->uprobes;
3224 probe_cache__delete(cache);
3228 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
3229 struct probe_trace_event **tevs)
3233 if (!pev->group && !pev->sdt) {
3234 /* Set group name if not given */
3235 if (!pev->uprobes) {
3236 pev->group = strdup(PERFPROBE_GROUP);
3237 ret = pev->group ? 0 : -ENOMEM;
3239 ret = convert_exec_to_group(pev->target, &pev->group);
3241 pr_warning("Failed to make a group name.\n");
3246 ret = try_to_find_absolute_address(pev, tevs);
3250 /* At first, we need to lookup cache entry */
3251 ret = find_probe_trace_events_from_cache(pev, tevs);
3252 if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */
3253 return ret == 0 ? -ENOENT : ret; /* Found in probe cache */
3255 /* Convert perf_probe_event with debuginfo */
3256 ret = try_to_find_probe_trace_events(pev, tevs);
3258 return ret; /* Found in debuginfo or got an error */
3260 return find_probe_trace_events_from_map(pev, tevs);
3263 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3267 /* Loop 1: convert all events */
3268 for (i = 0; i < npevs; i++) {
3269 /* Init kprobe blacklist if needed */
3270 if (!pevs[i].uprobes)
3271 kprobe_blacklist__init();
3272 /* Convert with or without debuginfo */
3273 ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs);
3276 pevs[i].ntevs = ret;
3278 /* This just release blacklist only if allocated */
3279 kprobe_blacklist__release();
3284 static int show_probe_trace_event(struct probe_trace_event *tev)
3286 char *buf = synthesize_probe_trace_command(tev);
3289 pr_debug("Failed to synthesize probe trace event.\n");
3293 /* Showing definition always go stdout */
3294 printf("%s\n", buf);
3300 int show_probe_trace_events(struct perf_probe_event *pevs, int npevs)
3302 struct strlist *namelist = strlist__new(NULL, NULL);
3303 struct probe_trace_event *tev;
3304 struct perf_probe_event *pev;
3310 for (j = 0; j < npevs && !ret; j++) {
3312 for (i = 0; i < pev->ntevs && !ret; i++) {
3313 tev = &pev->tevs[i];
3314 /* Skip if the symbol is out of .text or blacklisted */
3315 if (!tev->point.symbol && !pev->uprobes)
3318 /* Set new name for tev (and update namelist) */
3319 ret = probe_trace_event__set_name(tev, pev,
3322 ret = show_probe_trace_event(tev);
3325 strlist__delete(namelist);
3330 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3334 /* Loop 2: add all events */
3335 for (i = 0; i < npevs; i++) {
3336 ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs,
3338 probe_conf.force_add);
3345 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3349 /* Loop 3: cleanup and free trace events */
3350 for (i = 0; i < npevs; i++) {
3351 for (j = 0; j < pevs[i].ntevs; j++)
3352 clear_probe_trace_event(&pevs[i].tevs[j]);
3353 zfree(&pevs[i].tevs);
3355 clear_perf_probe_event(&pevs[i]);
3359 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3363 ret = init_probe_symbol_maps(pevs->uprobes);
3367 ret = convert_perf_probe_events(pevs, npevs);
3369 ret = apply_perf_probe_events(pevs, npevs);
3371 cleanup_perf_probe_events(pevs, npevs);
3373 exit_probe_symbol_maps();
3377 int del_perf_probe_events(struct strfilter *filter)
3379 int ret, ret2, ufd = -1, kfd = -1;
3380 char *str = strfilter__string(filter);
3385 /* Get current event names */
3386 ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
3390 ret = probe_file__del_events(kfd, filter);
3391 if (ret < 0 && ret != -ENOENT)
3394 ret2 = probe_file__del_events(ufd, filter);
3395 if (ret2 < 0 && ret2 != -ENOENT) {
3412 int show_available_funcs(const char *target, struct strfilter *_filter,
3419 ret = init_probe_symbol_maps(user);
3423 /* Get a symbol map */
3424 map = get_target_map(target, user);
3426 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
3430 ret = map__load(map);
3433 char *str = strfilter__string(_filter);
3434 pr_err("Failed to find symbols matched to \"%s\"\n",
3438 pr_err("Failed to load symbols in %s\n",
3439 (target) ? : "kernel");
3442 if (!dso__sorted_by_name(map->dso, map->type))
3443 dso__sort_by_name(map->dso, map->type);
3445 /* Show all (filtered) symbols */
3448 for (nd = rb_first(&map->dso->symbol_names[map->type]); nd; nd = rb_next(nd)) {
3449 struct symbol_name_rb_node *pos = rb_entry(nd, struct symbol_name_rb_node, rb_node);
3451 if (strfilter__compare(_filter, pos->sym.name))
3452 printf("%s\n", pos->sym.name);
3457 exit_probe_symbol_maps();
3462 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
3463 struct perf_probe_arg *pvar)
3465 tvar->value = strdup(pvar->var);
3466 if (tvar->value == NULL)
3469 tvar->type = strdup(pvar->type);
3470 if (tvar->type == NULL)
3474 tvar->name = strdup(pvar->name);
3475 if (tvar->name == NULL)