2 * probe-event.c : perf-probe definition to probe_events format converter
4 * Written by Masami Hiramatsu <mhiramat@redhat.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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 ref_reloc_sym *kernel_get_ref_reloc_sym(struct map **pmap)
116 /* kmap->ref_reloc_sym should be set if host_machine is initialized */
118 struct map *map = machine__kernel_map(host_machine);
120 if (map__load(map) < 0)
123 kmap = map__kmap(map);
130 return kmap->ref_reloc_sym;
133 static int kernel_get_symbol_address_by_name(const char *name, u64 *addr,
134 bool reloc, bool reladdr)
136 struct ref_reloc_sym *reloc_sym;
140 /* ref_reloc_sym is just a label. Need a special fix*/
141 reloc_sym = kernel_get_ref_reloc_sym(NULL);
142 if (reloc_sym && strcmp(name, reloc_sym->name) == 0)
143 *addr = (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr;
145 sym = machine__find_kernel_symbol_by_name(host_machine, name, &map);
148 *addr = map->unmap_ip(map, sym->start) -
149 ((reloc) ? 0 : map->reloc) -
150 ((reladdr) ? map->start : 0);
155 static struct map *kernel_get_module_map(const char *module)
157 struct maps *maps = machine__kernel_maps(host_machine);
160 /* A file path -- this is an offline module */
161 if (module && strchr(module, '/'))
162 return dso__new_map(module);
165 pos = machine__kernel_map(host_machine);
166 return map__get(pos);
169 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
170 /* short_name is "[module]" */
171 if (strncmp(pos->dso->short_name + 1, module,
172 pos->dso->short_name_len - 2) == 0 &&
173 module[pos->dso->short_name_len - 2] == '\0') {
174 return map__get(pos);
180 struct map *get_target_map(const char *target, struct nsinfo *nsi, bool user)
182 /* Init maps of given executable or kernel */
186 map = dso__new_map(target);
187 if (map && map->dso) {
188 nsinfo__put(map->dso->nsinfo);
189 map->dso->nsinfo = nsinfo__get(nsi);
193 return kernel_get_module_map(target);
197 static int convert_exec_to_group(const char *exec, char **result)
199 char *ptr1, *ptr2, *exec_copy;
203 exec_copy = strdup(exec);
207 ptr1 = basename(exec_copy);
213 for (ptr2 = ptr1; *ptr2 != '\0'; ptr2++) {
214 if (!isalnum(*ptr2) && *ptr2 != '_') {
220 ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1);
224 *result = strdup(buf);
225 ret = *result ? 0 : -ENOMEM;
232 static void clear_perf_probe_point(struct perf_probe_point *pp)
239 static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs)
243 for (i = 0; i < ntevs; i++)
244 clear_probe_trace_event(tevs + i);
247 static bool kprobe_blacklist__listed(unsigned long address);
248 static bool kprobe_warn_out_range(const char *symbol, unsigned long address)
253 map = kernel_get_module_map(NULL);
255 ret = address <= map->start || map->end < address;
257 pr_warning("%s is out of .text, skip it.\n", symbol);
260 if (!ret && kprobe_blacklist__listed(address)) {
261 pr_warning("%s is blacklisted function, skip it.\n", symbol);
269 * @module can be module name of module file path. In case of path,
270 * inspect elf and find out what is actual module name.
271 * Caller has to free mod_name after using it.
273 static char *find_module_name(const char *module)
281 char *mod_name = NULL;
284 fd = open(module, O_RDONLY);
288 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
292 if (gelf_getehdr(elf, &ehdr) == NULL)
295 sec = elf_section_by_name(elf, &ehdr, &shdr,
296 ".gnu.linkonce.this_module", NULL);
300 data = elf_getdata(sec, NULL);
301 if (!data || !data->d_buf)
306 * '.gnu.linkonce.this_module' section of kernel module elf directly
307 * maps to 'struct module' from linux/module.h. This section contains
308 * actual module name which will be used by kernel after loading it.
309 * But, we cannot use 'struct module' here since linux/module.h is not
310 * exposed to user-space. Offset of 'name' has remained same from long
311 * time, so hardcoding it here.
313 if (ehdr.e_ident[EI_CLASS] == ELFCLASS32)
315 else /* expect ELFCLASS64 by default */
318 mod_name = strdup((char *)data->d_buf + name_offset);
327 #ifdef HAVE_DWARF_SUPPORT
329 static int kernel_get_module_dso(const char *module, struct dso **pdso)
333 const char *vmlinux_name;
337 char module_name[128];
339 snprintf(module_name, sizeof(module_name), "[%s]", module);
340 map = map_groups__find_by_name(&host_machine->kmaps, module_name);
345 pr_debug("Failed to find module %s.\n", module);
349 map = machine__kernel_map(host_machine);
352 vmlinux_name = symbol_conf.vmlinux_name;
355 ret = dso__load_vmlinux(dso, map, vmlinux_name, false);
357 ret = dso__load_vmlinux_path(dso, map);
364 * Some binaries like glibc have special symbols which are on the symbol
365 * table, but not in the debuginfo. If we can find the address of the
366 * symbol from map, we can translate the address back to the probe point.
368 static int find_alternative_probe_point(struct debuginfo *dinfo,
369 struct perf_probe_point *pp,
370 struct perf_probe_point *result,
371 const char *target, struct nsinfo *nsi,
374 struct map *map = NULL;
379 /* This can work only for function-name based one */
380 if (!pp->function || pp->file)
383 map = get_target_map(target, nsi, uprobes);
387 /* Find the address of given function */
388 map__for_each_symbol_by_name(map, pp->function, sym) {
390 address = sym->start;
392 address = map->unmap_ip(map, sym->start) - map->reloc;
399 pr_debug("Symbol %s address found : %" PRIx64 "\n",
400 pp->function, address);
402 ret = debuginfo__find_probe_point(dinfo, (unsigned long)address,
405 ret = (!ret) ? -ENOENT : ret;
407 result->offset += pp->offset;
408 result->line += pp->line;
409 result->retprobe = pp->retprobe;
419 static int get_alternative_probe_event(struct debuginfo *dinfo,
420 struct perf_probe_event *pev,
421 struct perf_probe_point *tmp)
425 memcpy(tmp, &pev->point, sizeof(*tmp));
426 memset(&pev->point, 0, sizeof(pev->point));
427 ret = find_alternative_probe_point(dinfo, tmp, &pev->point, pev->target,
428 pev->nsi, pev->uprobes);
430 memcpy(&pev->point, tmp, sizeof(*tmp));
435 static int get_alternative_line_range(struct debuginfo *dinfo,
436 struct line_range *lr,
437 const char *target, bool user)
439 struct perf_probe_point pp = { .function = lr->function,
442 struct perf_probe_point result;
445 memset(&result, 0, sizeof(result));
447 if (lr->end != INT_MAX)
448 len = lr->end - lr->start;
449 ret = find_alternative_probe_point(dinfo, &pp, &result,
452 lr->function = result.function;
453 lr->file = result.file;
454 lr->start = result.line;
455 if (lr->end != INT_MAX)
456 lr->end = lr->start + len;
457 clear_perf_probe_point(&pp);
462 /* Open new debuginfo of given module */
463 static struct debuginfo *open_debuginfo(const char *module, struct nsinfo *nsi,
466 const char *path = module;
467 char reason[STRERR_BUFSIZE];
468 struct debuginfo *ret = NULL;
469 struct dso *dso = NULL;
473 if (!module || !strchr(module, '/')) {
474 err = kernel_get_module_dso(module, &dso);
476 if (!dso || dso->load_errno == 0) {
477 if (!str_error_r(-err, reason, STRERR_BUFSIZE))
478 strcpy(reason, "(unknown)");
480 dso__strerror_load(dso, reason, STRERR_BUFSIZE);
482 pr_err("Failed to find the path for %s: %s\n",
483 module ?: "kernel", reason);
486 path = dso->long_name;
488 nsinfo__mountns_enter(nsi, &nsc);
489 ret = debuginfo__new(path);
490 if (!ret && !silent) {
491 pr_warning("The %s file has no debug information.\n", path);
492 if (!module || !strtailcmp(path, ".ko"))
493 pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, ");
495 pr_warning("Rebuild with -g, ");
496 pr_warning("or install an appropriate debuginfo package.\n");
498 nsinfo__mountns_exit(&nsc);
502 /* For caching the last debuginfo */
503 static struct debuginfo *debuginfo_cache;
504 static char *debuginfo_cache_path;
506 static struct debuginfo *debuginfo_cache__open(const char *module, bool silent)
508 const char *path = module;
510 /* If the module is NULL, it should be the kernel. */
514 if (debuginfo_cache_path && !strcmp(debuginfo_cache_path, path))
517 /* Copy module path */
518 free(debuginfo_cache_path);
519 debuginfo_cache_path = strdup(path);
520 if (!debuginfo_cache_path) {
521 debuginfo__delete(debuginfo_cache);
522 debuginfo_cache = NULL;
526 debuginfo_cache = open_debuginfo(module, NULL, silent);
527 if (!debuginfo_cache)
528 zfree(&debuginfo_cache_path);
530 return debuginfo_cache;
533 static void debuginfo_cache__exit(void)
535 debuginfo__delete(debuginfo_cache);
536 debuginfo_cache = NULL;
537 zfree(&debuginfo_cache_path);
541 static int get_text_start_address(const char *exec, unsigned long *address,
547 int fd, ret = -ENOENT;
550 nsinfo__mountns_enter(nsi, &nsc);
551 fd = open(exec, O_RDONLY);
552 nsinfo__mountns_exit(&nsc);
556 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
562 if (gelf_getehdr(elf, &ehdr) == NULL)
565 if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL))
568 *address = shdr.sh_addr - shdr.sh_offset;
579 * Convert trace point to probe point with debuginfo
581 static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
582 struct perf_probe_point *pp,
585 struct debuginfo *dinfo = NULL;
586 unsigned long stext = 0;
587 u64 addr = tp->address;
590 /* convert the address to dwarf address */
596 ret = get_text_start_address(tp->module, &stext, NULL);
600 } else if (tp->symbol) {
601 /* If the module is given, this returns relative address */
602 ret = kernel_get_symbol_address_by_name(tp->symbol, &addr,
603 false, !!tp->module);
609 pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
610 tp->module ? : "kernel");
612 dinfo = debuginfo_cache__open(tp->module, verbose <= 0);
614 ret = debuginfo__find_probe_point(dinfo,
615 (unsigned long)addr, pp);
620 pp->retprobe = tp->retprobe;
624 pr_debug("Failed to find corresponding probes from debuginfo.\n");
625 return ret ? : -ENOENT;
628 /* Adjust symbol name and address */
629 static int post_process_probe_trace_point(struct probe_trace_point *tp,
630 struct map *map, unsigned long offs)
633 u64 addr = tp->address - offs;
635 sym = map__find_symbol(map, addr);
639 if (strcmp(sym->name, tp->symbol)) {
640 /* If we have no realname, use symbol for it */
642 tp->realname = tp->symbol;
645 tp->symbol = strdup(sym->name);
649 tp->offset = addr - sym->start;
656 * Rename DWARF symbols to ELF symbols -- gcc sometimes optimizes functions
657 * and generate new symbols with suffixes such as .constprop.N or .isra.N
658 * etc. Since those symbols are not recorded in DWARF, we have to find
659 * correct generated symbols from offline ELF binary.
660 * For online kernel or uprobes we don't need this because those are
661 * rebased on _text, or already a section relative address.
664 post_process_offline_probe_trace_events(struct probe_trace_event *tevs,
665 int ntevs, const char *pathname)
668 unsigned long stext = 0;
671 /* Prepare a map for offline binary */
672 map = dso__new_map(pathname);
673 if (!map || get_text_start_address(pathname, &stext, NULL) < 0) {
674 pr_warning("Failed to get ELF symbols for %s\n", pathname);
678 for (i = 0; i < ntevs; i++) {
679 ret = post_process_probe_trace_point(&tevs[i].point,
689 static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
690 int ntevs, const char *exec,
694 unsigned long stext = 0;
699 ret = get_text_start_address(exec, &stext, nsi);
703 for (i = 0; i < ntevs && ret >= 0; i++) {
704 /* point.address is the addres of point.symbol + point.offset */
705 tevs[i].point.address -= stext;
706 tevs[i].point.module = strdup(exec);
707 if (!tevs[i].point.module) {
711 tevs[i].uprobes = true;
718 post_process_module_probe_trace_events(struct probe_trace_event *tevs,
719 int ntevs, const char *module,
720 struct debuginfo *dinfo)
722 Dwarf_Addr text_offs = 0;
724 char *mod_name = NULL;
730 map = get_target_map(module, NULL, false);
731 if (!map || debuginfo__get_text_offset(dinfo, &text_offs, true) < 0) {
732 pr_warning("Failed to get ELF symbols for %s\n", module);
736 mod_name = find_module_name(module);
737 for (i = 0; i < ntevs; i++) {
738 ret = post_process_probe_trace_point(&tevs[i].point,
739 map, (unsigned long)text_offs);
742 tevs[i].point.module =
743 strdup(mod_name ? mod_name : module);
744 if (!tevs[i].point.module) {
757 post_process_kernel_probe_trace_events(struct probe_trace_event *tevs,
760 struct ref_reloc_sym *reloc_sym;
765 /* Skip post process if the target is an offline kernel */
766 if (symbol_conf.ignore_vmlinux_buildid)
767 return post_process_offline_probe_trace_events(tevs, ntevs,
768 symbol_conf.vmlinux_name);
770 reloc_sym = kernel_get_ref_reloc_sym(&map);
772 pr_warning("Relocated base symbol is not found!\n");
776 for (i = 0; i < ntevs; i++) {
777 if (!tevs[i].point.address)
779 if (tevs[i].point.retprobe && !kretprobe_offset_is_supported())
782 * If we found a wrong one, mark it by NULL symbol.
783 * Since addresses in debuginfo is same as objdump, we need
784 * to convert it to addresses on memory.
786 if (kprobe_warn_out_range(tevs[i].point.symbol,
787 map__objdump_2mem(map, tevs[i].point.address))) {
791 tmp = strdup(reloc_sym->name);
795 /* If we have no realname, use symbol for it */
796 if (!tevs[i].point.realname)
797 tevs[i].point.realname = tevs[i].point.symbol;
799 free(tevs[i].point.symbol);
800 tevs[i].point.symbol = tmp;
801 tevs[i].point.offset = tevs[i].point.address -
802 reloc_sym->unrelocated_addr;
808 arch__post_process_probe_trace_events(struct perf_probe_event *pev __maybe_unused,
809 int ntevs __maybe_unused)
813 /* Post processing the probe events */
814 static int post_process_probe_trace_events(struct perf_probe_event *pev,
815 struct probe_trace_event *tevs,
816 int ntevs, const char *module,
817 bool uprobe, struct debuginfo *dinfo)
822 ret = add_exec_to_probe_trace_events(tevs, ntevs, module,
825 /* Currently ref_reloc_sym based probe is not for drivers */
826 ret = post_process_module_probe_trace_events(tevs, ntevs,
829 ret = post_process_kernel_probe_trace_events(tevs, ntevs);
832 arch__post_process_probe_trace_events(pev, ntevs);
837 /* Try to find perf_probe_event with debuginfo */
838 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
839 struct probe_trace_event **tevs)
841 bool need_dwarf = perf_probe_event_need_dwarf(pev);
842 struct perf_probe_point tmp;
843 struct debuginfo *dinfo;
846 dinfo = open_debuginfo(pev->target, pev->nsi, !need_dwarf);
850 pr_debug("Could not open debuginfo. Try to use symbols.\n");
854 pr_debug("Try to find probe point from debuginfo.\n");
855 /* Searching trace events corresponding to a probe event */
856 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
858 if (ntevs == 0) { /* Not found, retry with an alternative */
859 ret = get_alternative_probe_event(dinfo, pev, &tmp);
861 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
863 * Write back to the original probe_event for
864 * setting appropriate (user given) event name
866 clear_perf_probe_point(&pev->point);
867 memcpy(&pev->point, &tmp, sizeof(tmp));
871 if (ntevs > 0) { /* Succeeded to find trace events */
872 pr_debug("Found %d probe_trace_events.\n", ntevs);
873 ret = post_process_probe_trace_events(pev, *tevs, ntevs,
874 pev->target, pev->uprobes, dinfo);
875 if (ret < 0 || ret == ntevs) {
876 pr_debug("Post processing failed or all events are skipped. (%d)\n", ret);
877 clear_probe_trace_events(*tevs, ntevs);
883 debuginfo__delete(dinfo);
885 if (ntevs == 0) { /* No error but failed to find probe point. */
886 pr_warning("Probe point '%s' not found.\n",
887 synthesize_perf_probe_point(&pev->point));
889 } else if (ntevs < 0) {
890 /* Error path : ntevs < 0 */
891 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
893 pr_warning("Warning: No dwarf info found in the vmlinux - "
894 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
896 pr_debug("Trying to use symbols.\n");
903 #define LINEBUF_SIZE 256
904 #define NR_ADDITIONAL_LINES 2
906 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
908 char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE];
909 const char *color = show_num ? "" : PERF_COLOR_BLUE;
910 const char *prefix = NULL;
913 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
918 prefix = show_num ? "%7d " : " ";
919 color_fprintf(stdout, color, prefix, l);
921 color_fprintf(stdout, color, "%s", buf);
923 } while (strchr(buf, '\n') == NULL);
928 pr_warning("File read error: %s\n",
929 str_error_r(errno, sbuf, sizeof(sbuf)));
935 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
937 int rv = __show_one_line(fp, l, skip, show_num);
939 pr_warning("Source file is shorter than expected.\n");
945 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
946 #define show_one_line(f,l) _show_one_line(f,l,false,false)
947 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
948 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
951 * Show line-range always requires debuginfo to find source file and
954 static int __show_line_range(struct line_range *lr, const char *module,
959 struct debuginfo *dinfo;
963 char sbuf[STRERR_BUFSIZE];
965 /* Search a line range */
966 dinfo = open_debuginfo(module, NULL, false);
970 ret = debuginfo__find_line_range(dinfo, lr);
971 if (!ret) { /* Not found, retry with an alternative */
972 ret = get_alternative_line_range(dinfo, lr, module, user);
974 ret = debuginfo__find_line_range(dinfo, lr);
976 debuginfo__delete(dinfo);
977 if (ret == 0 || ret == -ENOENT) {
978 pr_warning("Specified source line is not found.\n");
980 } else if (ret < 0) {
981 pr_warning("Debuginfo analysis failed.\n");
985 /* Convert source file path */
987 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
989 /* Free old path when new path is assigned */
994 pr_warning("Failed to find source file path.\n");
1001 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
1002 lr->start - lr->offset);
1004 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
1006 fp = fopen(lr->path, "r");
1008 pr_warning("Failed to open %s: %s\n", lr->path,
1009 str_error_r(errno, sbuf, sizeof(sbuf)));
1012 /* Skip to starting line number */
1013 while (l < lr->start) {
1014 ret = skip_one_line(fp, l++);
1019 intlist__for_each_entry(ln, lr->line_list) {
1020 for (; ln->i > l; l++) {
1021 ret = show_one_line(fp, l - lr->offset);
1025 ret = show_one_line_with_num(fp, l++ - lr->offset);
1030 if (lr->end == INT_MAX)
1031 lr->end = l + NR_ADDITIONAL_LINES;
1032 while (l <= lr->end) {
1033 ret = show_one_line_or_eof(fp, l++ - lr->offset);
1042 int show_line_range(struct line_range *lr, const char *module,
1043 struct nsinfo *nsi, bool user)
1046 struct nscookie nsc;
1048 ret = init_probe_symbol_maps(user);
1051 nsinfo__mountns_enter(nsi, &nsc);
1052 ret = __show_line_range(lr, module, user);
1053 nsinfo__mountns_exit(&nsc);
1054 exit_probe_symbol_maps();
1059 static int show_available_vars_at(struct debuginfo *dinfo,
1060 struct perf_probe_event *pev,
1061 struct strfilter *_filter)
1065 struct str_node *node;
1066 struct variable_list *vls = NULL, *vl;
1067 struct perf_probe_point tmp;
1070 buf = synthesize_perf_probe_point(&pev->point);
1073 pr_debug("Searching variables at %s\n", buf);
1075 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls);
1076 if (!ret) { /* Not found, retry with an alternative */
1077 ret = get_alternative_probe_event(dinfo, pev, &tmp);
1079 ret = debuginfo__find_available_vars_at(dinfo, pev,
1081 /* Release the old probe_point */
1082 clear_perf_probe_point(&tmp);
1086 if (ret == 0 || ret == -ENOENT) {
1087 pr_err("Failed to find the address of %s\n", buf);
1090 pr_warning("Debuginfo analysis failed.\n");
1094 /* Some variables are found */
1095 fprintf(stdout, "Available variables at %s\n", buf);
1096 for (i = 0; i < ret; i++) {
1099 * A probe point might be converted to
1100 * several trace points.
1102 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
1104 zfree(&vl->point.symbol);
1107 strlist__for_each_entry(node, vl->vars) {
1108 var = strchr(node->s, '\t') + 1;
1109 if (strfilter__compare(_filter, var)) {
1110 fprintf(stdout, "\t\t%s\n", node->s);
1114 strlist__delete(vl->vars);
1117 fprintf(stdout, "\t\t(No matched variables)\n");
1125 /* Show available variables on given probe point */
1126 int show_available_vars(struct perf_probe_event *pevs, int npevs,
1127 struct strfilter *_filter)
1130 struct debuginfo *dinfo;
1132 ret = init_probe_symbol_maps(pevs->uprobes);
1136 dinfo = open_debuginfo(pevs->target, pevs->nsi, false);
1144 for (i = 0; i < npevs && ret >= 0; i++)
1145 ret = show_available_vars_at(dinfo, &pevs[i], _filter);
1147 debuginfo__delete(dinfo);
1149 exit_probe_symbol_maps();
1153 #else /* !HAVE_DWARF_SUPPORT */
1155 static void debuginfo_cache__exit(void)
1160 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
1161 struct perf_probe_point *pp __maybe_unused,
1162 bool is_kprobe __maybe_unused)
1167 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
1168 struct probe_trace_event **tevs __maybe_unused)
1170 if (perf_probe_event_need_dwarf(pev)) {
1171 pr_warning("Debuginfo-analysis is not supported.\n");
1178 int show_line_range(struct line_range *lr __maybe_unused,
1179 const char *module __maybe_unused,
1180 struct nsinfo *nsi __maybe_unused,
1181 bool user __maybe_unused)
1183 pr_warning("Debuginfo-analysis is not supported.\n");
1187 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
1188 int npevs __maybe_unused,
1189 struct strfilter *filter __maybe_unused)
1191 pr_warning("Debuginfo-analysis is not supported.\n");
1196 void line_range__clear(struct line_range *lr)
1202 intlist__delete(lr->line_list);
1203 memset(lr, 0, sizeof(*lr));
1206 int line_range__init(struct line_range *lr)
1208 memset(lr, 0, sizeof(*lr));
1209 lr->line_list = intlist__new(NULL);
1216 static int parse_line_num(char **ptr, int *val, const char *what)
1218 const char *start = *ptr;
1221 *val = strtol(*ptr, ptr, 0);
1222 if (errno || *ptr == start) {
1223 semantic_error("'%s' is not a valid number.\n", what);
1229 /* Check the name is good for event, group or function */
1230 static bool is_c_func_name(const char *name)
1232 if (!isalpha(*name) && *name != '_')
1234 while (*++name != '\0') {
1235 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
1242 * Stuff 'lr' according to the line range described by 'arg'.
1243 * The line range syntax is described by:
1245 * SRC[:SLN[+NUM|-ELN]]
1246 * FNC[@SRC][:SLN[+NUM|-ELN]]
1248 int parse_line_range_desc(const char *arg, struct line_range *lr)
1250 char *range, *file, *name = strdup(arg);
1259 range = strchr(name, ':');
1263 err = parse_line_num(&range, &lr->start, "start line");
1267 if (*range == '+' || *range == '-') {
1268 const char c = *range++;
1270 err = parse_line_num(&range, &lr->end, "end line");
1275 lr->end += lr->start;
1277 * Adjust the number of lines here.
1278 * If the number of lines == 1, the
1279 * the end of line should be equal to
1280 * the start of line.
1286 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
1289 if (lr->start > lr->end) {
1290 semantic_error("Start line must be smaller"
1291 " than end line.\n");
1294 if (*range != '\0') {
1295 semantic_error("Tailing with invalid str '%s'.\n", range);
1300 file = strchr(name, '@');
1303 lr->file = strdup(++file);
1304 if (lr->file == NULL) {
1308 lr->function = name;
1309 } else if (strchr(name, '/') || strchr(name, '.'))
1311 else if (is_c_func_name(name))/* We reuse it for checking funcname */
1312 lr->function = name;
1313 else { /* Invalid name */
1314 semantic_error("'%s' is not a valid function name.\n", name);
1325 static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev)
1329 ptr = strpbrk_esc(*arg, ":");
1332 if (!pev->sdt && !is_c_func_name(*arg))
1334 pev->group = strdup_esc(*arg);
1341 pev->event = strdup_esc(*arg);
1342 if (pev->event == NULL)
1345 if (!pev->sdt && !is_c_func_name(pev->event)) {
1349 semantic_error("%s is bad for event name -it must "
1350 "follow C symbol-naming rule.\n", *arg);
1356 /* Parse probepoint definition. */
1357 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
1359 struct perf_probe_point *pp = &pev->point;
1362 bool file_spec = false;
1367 * perf probe [GRP:][EVENT=]SRC[:LN|;PTN]
1368 * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
1369 * perf probe %[GRP:]SDT_EVENT
1374 if (is_sdt_event(arg)) {
1380 ptr = strpbrk_esc(arg, ";=@+%");
1384 semantic_error("%s must be an SDT name.\n",
1388 /* This must be a target file name or build id */
1389 tmp = build_id_cache__complement(ptr + 1);
1391 pev->target = build_id_cache__origname(tmp);
1394 pev->target = strdup_esc(ptr + 1);
1399 ret = parse_perf_probe_event_name(&arg, pev);
1401 if (asprintf(&pev->point.function, "%%%s", pev->event) < 0)
1407 if (ptr && *ptr == '=') { /* Event name */
1410 ret = parse_perf_probe_event_name(&arg, pev);
1418 * Check arg is function or file name and copy it.
1420 * We consider arg to be a file spec if and only if it satisfies
1421 * all of the below criteria::
1422 * - it does not include any of "+@%",
1423 * - it includes one of ":;", and
1424 * - it has a period '.' in the name.
1426 * Otherwise, we consider arg to be a function specification.
1428 if (!strpbrk_esc(arg, "+@%")) {
1429 ptr = strpbrk_esc(arg, ";:");
1430 /* This is a file spec if it includes a '.' before ; or : */
1431 if (ptr && memchr(arg, '.', ptr - arg))
1435 ptr = strpbrk_esc(arg, ";:+@%");
1444 tmp = strdup_esc(arg);
1455 * Keep pp->function even if this is absolute address,
1456 * so it can mark whether abs_address is valid.
1457 * Which make 'perf probe lib.bin 0x0' possible.
1459 * Note that checking length of tmp is not needed
1460 * because when we access tmp[1] we know tmp[0] is '0',
1461 * so tmp[1] should always valid (but could be '\0').
1463 if (tmp && !strncmp(tmp, "0x", 2)) {
1464 pp->abs_address = strtoul(pp->function, &tmp, 0);
1466 semantic_error("Invalid absolute address.\n");
1472 /* Parse other options */
1476 if (c == ';') { /* Lazy pattern must be the last part */
1477 pp->lazy_line = strdup(arg); /* let leave escapes */
1478 if (pp->lazy_line == NULL)
1482 ptr = strpbrk_esc(arg, ";:+@%");
1488 case ':': /* Line number */
1489 pp->line = strtoul(arg, &tmp, 0);
1491 semantic_error("There is non-digit char"
1492 " in line number.\n");
1496 case '+': /* Byte offset from a symbol */
1497 pp->offset = strtoul(arg, &tmp, 0);
1499 semantic_error("There is non-digit character"
1504 case '@': /* File name */
1506 semantic_error("SRC@SRC is not allowed.\n");
1509 pp->file = strdup_esc(arg);
1510 if (pp->file == NULL)
1513 case '%': /* Probe places */
1514 if (strcmp(arg, "return") == 0) {
1516 } else { /* Others not supported yet */
1517 semantic_error("%%%s is not supported.\n", arg);
1521 default: /* Buggy case */
1522 pr_err("This program has a bug at %s:%d.\n",
1523 __FILE__, __LINE__);
1529 /* Exclusion check */
1530 if (pp->lazy_line && pp->line) {
1531 semantic_error("Lazy pattern can't be used with"
1536 if (pp->lazy_line && pp->offset) {
1537 semantic_error("Lazy pattern can't be used with offset.\n");
1541 if (pp->line && pp->offset) {
1542 semantic_error("Offset can't be used with line number.\n");
1546 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1547 semantic_error("File always requires line number or "
1552 if (pp->offset && !pp->function) {
1553 semantic_error("Offset requires an entry function.\n");
1557 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1558 semantic_error("Offset/Line/Lazy pattern can't be used with "
1563 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1564 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1569 /* Parse perf-probe event argument */
1570 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1572 char *tmp, *goodname;
1573 struct perf_probe_arg_field **fieldp;
1575 pr_debug("parsing arg: %s into ", str);
1577 tmp = strchr(str, '=');
1579 arg->name = strndup(str, tmp - str);
1580 if (arg->name == NULL)
1582 pr_debug("name:%s ", arg->name);
1586 tmp = strchr(str, ':');
1587 if (tmp) { /* Type setting */
1589 arg->type = strdup(tmp + 1);
1590 if (arg->type == NULL)
1592 pr_debug("type:%s ", arg->type);
1595 tmp = strpbrk(str, "-.[");
1596 if (!is_c_varname(str) || !tmp) {
1597 /* A variable, register, symbol or special value */
1598 arg->var = strdup(str);
1599 if (arg->var == NULL)
1601 pr_debug("%s\n", arg->var);
1605 /* Structure fields or array element */
1606 arg->var = strndup(str, tmp - str);
1607 if (arg->var == NULL)
1609 goodname = arg->var;
1610 pr_debug("%s, ", arg->var);
1611 fieldp = &arg->field;
1614 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1615 if (*fieldp == NULL)
1617 if (*tmp == '[') { /* Array */
1619 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1620 (*fieldp)->ref = true;
1621 if (*tmp != ']' || tmp == str + 1) {
1622 semantic_error("Array index must be a"
1629 } else { /* Structure */
1632 (*fieldp)->ref = false;
1633 } else if (tmp[1] == '>') {
1635 (*fieldp)->ref = true;
1637 semantic_error("Argument parse error: %s\n",
1641 tmp = strpbrk(str, "-.[");
1644 (*fieldp)->name = strndup(str, tmp - str);
1645 if ((*fieldp)->name == NULL)
1648 goodname = (*fieldp)->name;
1649 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1650 fieldp = &(*fieldp)->next;
1653 (*fieldp)->name = strdup(str);
1654 if ((*fieldp)->name == NULL)
1657 goodname = (*fieldp)->name;
1658 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1660 /* If no name is specified, set the last field name (not array index)*/
1662 arg->name = strdup(goodname);
1663 if (arg->name == NULL)
1669 /* Parse perf-probe event command */
1670 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1673 int argc, i, ret = 0;
1675 argv = argv_split(cmd, &argc);
1677 pr_debug("Failed to split arguments.\n");
1680 if (argc - 1 > MAX_PROBE_ARGS) {
1681 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1685 /* Parse probe point */
1686 ret = parse_perf_probe_point(argv[0], pev);
1690 /* Copy arguments and ensure return probe has no C argument */
1691 pev->nargs = argc - 1;
1692 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1693 if (pev->args == NULL) {
1697 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1698 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1700 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1701 semantic_error("You can't specify local variable for"
1712 /* Returns true if *any* ARG is either C variable, $params or $vars. */
1713 bool perf_probe_with_var(struct perf_probe_event *pev)
1717 for (i = 0; i < pev->nargs; i++)
1718 if (is_c_varname(pev->args[i].var) ||
1719 !strcmp(pev->args[i].var, PROBE_ARG_PARAMS) ||
1720 !strcmp(pev->args[i].var, PROBE_ARG_VARS))
1725 /* Return true if this perf_probe_event requires debuginfo */
1726 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1728 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1731 if (perf_probe_with_var(pev))
1737 /* Parse probe_events event into struct probe_point */
1738 int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev)
1740 struct probe_trace_point *tp = &tev->point;
1743 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1747 pr_debug("Parsing probe_events: %s\n", cmd);
1748 argv = argv_split(cmd, &argc);
1750 pr_debug("Failed to split arguments.\n");
1754 semantic_error("Too few probe arguments.\n");
1759 /* Scan event and group name. */
1760 argv0_str = strdup(argv[0]);
1761 if (argv0_str == NULL) {
1765 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1766 fmt2_str = strtok_r(NULL, "/", &fmt);
1767 fmt3_str = strtok_r(NULL, " \t", &fmt);
1768 if (fmt1_str == NULL || fmt2_str == NULL || fmt3_str == NULL) {
1769 semantic_error("Failed to parse event name: %s\n", argv[0]);
1774 tev->group = strdup(fmt2_str);
1775 tev->event = strdup(fmt3_str);
1776 if (tev->group == NULL || tev->event == NULL) {
1780 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1782 tp->retprobe = (pr == 'r');
1784 /* Scan module name(if there), function name and offset */
1785 p = strchr(argv[1], ':');
1787 tp->module = strndup(argv[1], p - argv[1]);
1792 tev->uprobes = (tp->module[0] == '/');
1796 fmt1_str = strtok_r(p, "+", &fmt);
1797 /* only the address started with 0x */
1798 if (fmt1_str[0] == '0') {
1800 * Fix a special case:
1801 * if address == 0, kernel reports something like:
1802 * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax
1803 * Newer kernel may fix that, but we want to
1804 * support old kernel also.
1806 if (strcmp(fmt1_str, "0x") == 0) {
1807 if (!argv[2] || strcmp(argv[2], "(null)")) {
1814 for (i = 2; argv[i + 1] != NULL; i++)
1815 argv[i] = argv[i + 1];
1820 tp->address = strtoul(fmt1_str, NULL, 0);
1822 /* Only the symbol-based probe has offset */
1823 tp->symbol = strdup(fmt1_str);
1824 if (tp->symbol == NULL) {
1828 fmt2_str = strtok_r(NULL, "", &fmt);
1829 if (fmt2_str == NULL)
1832 tp->offset = strtoul(fmt2_str, NULL, 10);
1835 tev->nargs = argc - 2;
1836 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1837 if (tev->args == NULL) {
1841 for (i = 0; i < tev->nargs; i++) {
1842 p = strchr(argv[i + 2], '=');
1843 if (p) /* We don't need which register is assigned. */
1847 tev->args[i].name = strdup(argv[i + 2]);
1848 /* TODO: parse regs and offset */
1849 tev->args[i].value = strdup(p);
1850 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1862 /* Compose only probe arg */
1863 char *synthesize_perf_probe_arg(struct perf_probe_arg *pa)
1865 struct perf_probe_arg_field *field = pa->field;
1870 if (strbuf_init(&buf, 64) < 0)
1873 if (pa->name && pa->var)
1874 err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var);
1876 err = strbuf_addstr(&buf, pa->name ?: pa->var);
1881 if (field->name[0] == '[')
1882 err = strbuf_addstr(&buf, field->name);
1884 err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".",
1886 field = field->next;
1892 if (strbuf_addf(&buf, ":%s", pa->type) < 0)
1895 ret = strbuf_detach(&buf, NULL);
1897 strbuf_release(&buf);
1901 /* Compose only probe point (not argument) */
1902 char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1905 char *tmp, *ret = NULL;
1908 if (strbuf_init(&buf, 64) < 0)
1912 if (strbuf_addstr(&buf, pp->function) < 0)
1915 err = strbuf_addf(&buf, "+%lu", pp->offset);
1917 err = strbuf_addf(&buf, ":%d", pp->line);
1918 else if (pp->retprobe)
1919 err = strbuf_addstr(&buf, "%return");
1927 tmp = strchr(pp->file + len - 30, '/');
1928 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1930 err = strbuf_addf(&buf, "@%s", tmp);
1931 if (!err && !pp->function && pp->line)
1932 err = strbuf_addf(&buf, ":%d", pp->line);
1935 ret = strbuf_detach(&buf, NULL);
1937 strbuf_release(&buf);
1941 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1944 char *tmp, *ret = NULL;
1947 if (strbuf_init(&buf, 64))
1950 if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP,
1954 tmp = synthesize_perf_probe_point(&pev->point);
1955 if (!tmp || strbuf_addstr(&buf, tmp) < 0)
1959 for (i = 0; i < pev->nargs; i++) {
1960 tmp = synthesize_perf_probe_arg(pev->args + i);
1961 if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0)
1966 ret = strbuf_detach(&buf, NULL);
1968 strbuf_release(&buf);
1972 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1973 struct strbuf *buf, int depth)
1977 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1982 err = strbuf_addf(buf, "%+ld(", ref->offset);
1983 return (err < 0) ? err : depth;
1986 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1989 struct probe_trace_arg_ref *ref = arg->ref;
1992 /* Argument name or separator */
1994 err = strbuf_addf(buf, " %s=", arg->name);
1996 err = strbuf_addch(buf, ' ');
2000 /* Special case: @XXX */
2001 if (arg->value[0] == '@' && arg->ref)
2004 /* Dereferencing arguments */
2006 depth = __synthesize_probe_trace_arg_ref(ref, buf, 1);
2011 /* Print argument value */
2012 if (arg->value[0] == '@' && arg->ref)
2013 err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset);
2015 err = strbuf_addstr(buf, arg->value);
2018 while (!err && depth--)
2019 err = strbuf_addch(buf, ')');
2021 /* Print argument type */
2022 if (!err && arg->type)
2023 err = strbuf_addf(buf, ":%s", arg->type);
2028 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
2030 struct probe_trace_point *tp = &tev->point;
2035 /* Uprobes must have tp->module */
2036 if (tev->uprobes && !tp->module)
2039 if (strbuf_init(&buf, 32) < 0)
2042 if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
2043 tev->group, tev->event) < 0)
2046 * If tp->address == 0, then this point must be a
2047 * absolute address uprobe.
2048 * try_to_find_absolute_address() should have made
2049 * tp->symbol to "0x0".
2051 if (tev->uprobes && !tp->address) {
2052 if (!tp->symbol || strcmp(tp->symbol, "0x0"))
2056 /* Use the tp->address for uprobes */
2058 err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address);
2059 else if (!strncmp(tp->symbol, "0x", 2))
2060 /* Absolute address. See try_to_find_absolute_address() */
2061 err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "",
2062 tp->module ? ":" : "", tp->address);
2064 err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "",
2065 tp->module ? ":" : "", tp->symbol, tp->offset);
2069 for (i = 0; i < tev->nargs; i++)
2070 if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0)
2073 ret = strbuf_detach(&buf, NULL);
2075 strbuf_release(&buf);
2079 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
2080 struct perf_probe_point *pp,
2083 struct symbol *sym = NULL;
2084 struct map *map = NULL;
2085 u64 addr = tp->address;
2089 map = dso__new_map(tp->module);
2092 sym = map__find_symbol(map, addr);
2094 if (tp->symbol && !addr) {
2095 if (kernel_get_symbol_address_by_name(tp->symbol,
2096 &addr, true, false) < 0)
2101 sym = machine__find_kernel_symbol(host_machine, addr, &map);
2108 pp->retprobe = tp->retprobe;
2109 pp->offset = addr - map->unmap_ip(map, sym->start);
2110 pp->function = strdup(sym->name);
2111 ret = pp->function ? 0 : -ENOMEM;
2114 if (map && !is_kprobe) {
2121 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
2122 struct perf_probe_point *pp,
2128 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
2131 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
2135 pr_debug("Failed to find probe point from both of dwarf and map.\n");
2138 pp->function = strdup(tp->symbol);
2139 pp->offset = tp->offset;
2141 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
2144 pp->function = strdup(buf);
2147 if (pp->function == NULL)
2150 pp->retprobe = tp->retprobe;
2155 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
2156 struct perf_probe_event *pev, bool is_kprobe)
2158 struct strbuf buf = STRBUF_INIT;
2161 /* Convert event/group name */
2162 pev->event = strdup(tev->event);
2163 pev->group = strdup(tev->group);
2164 if (pev->event == NULL || pev->group == NULL)
2167 /* Convert trace_point to probe_point */
2168 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
2172 /* Convert trace_arg to probe_arg */
2173 pev->nargs = tev->nargs;
2174 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
2175 if (pev->args == NULL)
2177 for (i = 0; i < tev->nargs && ret >= 0; i++) {
2178 if (tev->args[i].name)
2179 pev->args[i].name = strdup(tev->args[i].name);
2181 if ((ret = strbuf_init(&buf, 32)) < 0)
2183 ret = synthesize_probe_trace_arg(&tev->args[i], &buf);
2184 pev->args[i].name = strbuf_detach(&buf, NULL);
2186 if (pev->args[i].name == NULL && ret >= 0)
2191 clear_perf_probe_event(pev);
2196 void clear_perf_probe_event(struct perf_probe_event *pev)
2198 struct perf_probe_arg_field *field, *next;
2204 clear_perf_probe_point(&pev->point);
2206 for (i = 0; i < pev->nargs; i++) {
2207 free(pev->args[i].name);
2208 free(pev->args[i].var);
2209 free(pev->args[i].type);
2210 field = pev->args[i].field;
2213 zfree(&field->name);
2219 memset(pev, 0, sizeof(*pev));
2222 #define strdup_or_goto(str, label) \
2223 ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; })
2225 static int perf_probe_point__copy(struct perf_probe_point *dst,
2226 struct perf_probe_point *src)
2228 dst->file = strdup_or_goto(src->file, out_err);
2229 dst->function = strdup_or_goto(src->function, out_err);
2230 dst->lazy_line = strdup_or_goto(src->lazy_line, out_err);
2231 dst->line = src->line;
2232 dst->retprobe = src->retprobe;
2233 dst->offset = src->offset;
2237 clear_perf_probe_point(dst);
2241 static int perf_probe_arg__copy(struct perf_probe_arg *dst,
2242 struct perf_probe_arg *src)
2244 struct perf_probe_arg_field *field, **ppfield;
2246 dst->name = strdup_or_goto(src->name, out_err);
2247 dst->var = strdup_or_goto(src->var, out_err);
2248 dst->type = strdup_or_goto(src->type, out_err);
2251 ppfield = &(dst->field);
2253 *ppfield = zalloc(sizeof(*field));
2256 (*ppfield)->name = strdup_or_goto(field->name, out_err);
2257 (*ppfield)->index = field->index;
2258 (*ppfield)->ref = field->ref;
2259 field = field->next;
2260 ppfield = &((*ppfield)->next);
2267 int perf_probe_event__copy(struct perf_probe_event *dst,
2268 struct perf_probe_event *src)
2272 dst->event = strdup_or_goto(src->event, out_err);
2273 dst->group = strdup_or_goto(src->group, out_err);
2274 dst->target = strdup_or_goto(src->target, out_err);
2275 dst->uprobes = src->uprobes;
2277 if (perf_probe_point__copy(&dst->point, &src->point) < 0)
2280 dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs);
2283 dst->nargs = src->nargs;
2285 for (i = 0; i < src->nargs; i++)
2286 if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0)
2291 clear_perf_probe_event(dst);
2295 void clear_probe_trace_event(struct probe_trace_event *tev)
2297 struct probe_trace_arg_ref *ref, *next;
2302 free(tev->point.symbol);
2303 free(tev->point.realname);
2304 free(tev->point.module);
2305 for (i = 0; i < tev->nargs; i++) {
2306 free(tev->args[i].name);
2307 free(tev->args[i].value);
2308 free(tev->args[i].type);
2309 ref = tev->args[i].ref;
2317 memset(tev, 0, sizeof(*tev));
2320 struct kprobe_blacklist_node {
2321 struct list_head list;
2322 unsigned long start;
2327 static void kprobe_blacklist__delete(struct list_head *blacklist)
2329 struct kprobe_blacklist_node *node;
2331 while (!list_empty(blacklist)) {
2332 node = list_first_entry(blacklist,
2333 struct kprobe_blacklist_node, list);
2334 list_del(&node->list);
2340 static int kprobe_blacklist__load(struct list_head *blacklist)
2342 struct kprobe_blacklist_node *node;
2343 const char *__debugfs = debugfs__mountpoint();
2344 char buf[PATH_MAX], *p;
2348 if (__debugfs == NULL)
2351 ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs);
2355 fp = fopen(buf, "r");
2360 while (fgets(buf, PATH_MAX, fp)) {
2361 node = zalloc(sizeof(*node));
2366 INIT_LIST_HEAD(&node->list);
2367 list_add_tail(&node->list, blacklist);
2368 if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) {
2372 p = strchr(buf, '\t');
2375 if (p[strlen(p) - 1] == '\n')
2376 p[strlen(p) - 1] = '\0';
2378 p = (char *)"unknown";
2379 node->symbol = strdup(p);
2380 if (!node->symbol) {
2384 pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n",
2385 node->start, node->end, node->symbol);
2389 kprobe_blacklist__delete(blacklist);
2395 static struct kprobe_blacklist_node *
2396 kprobe_blacklist__find_by_address(struct list_head *blacklist,
2397 unsigned long address)
2399 struct kprobe_blacklist_node *node;
2401 list_for_each_entry(node, blacklist, list) {
2402 if (node->start <= address && address < node->end)
2409 static LIST_HEAD(kprobe_blacklist);
2411 static void kprobe_blacklist__init(void)
2413 if (!list_empty(&kprobe_blacklist))
2416 if (kprobe_blacklist__load(&kprobe_blacklist) < 0)
2417 pr_debug("No kprobe blacklist support, ignored\n");
2420 static void kprobe_blacklist__release(void)
2422 kprobe_blacklist__delete(&kprobe_blacklist);
2425 static bool kprobe_blacklist__listed(unsigned long address)
2427 return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address);
2430 static int perf_probe_event__sprintf(const char *group, const char *event,
2431 struct perf_probe_event *pev,
2433 struct strbuf *result)
2438 if (asprintf(&buf, "%s:%s", group, event) < 0)
2440 ret = strbuf_addf(result, " %-20s (on ", buf);
2445 /* Synthesize only event probe point */
2446 buf = synthesize_perf_probe_point(&pev->point);
2449 ret = strbuf_addstr(result, buf);
2453 ret = strbuf_addf(result, " in %s", module);
2455 if (!ret && pev->nargs > 0) {
2456 ret = strbuf_add(result, " with", 5);
2457 for (i = 0; !ret && i < pev->nargs; i++) {
2458 buf = synthesize_perf_probe_arg(&pev->args[i]);
2461 ret = strbuf_addf(result, " %s", buf);
2466 ret = strbuf_addch(result, ')');
2472 int show_perf_probe_event(const char *group, const char *event,
2473 struct perf_probe_event *pev,
2474 const char *module, bool use_stdout)
2476 struct strbuf buf = STRBUF_INIT;
2479 ret = perf_probe_event__sprintf(group, event, pev, module, &buf);
2482 printf("%s\n", buf.buf);
2484 pr_info("%s\n", buf.buf);
2486 strbuf_release(&buf);
2491 static bool filter_probe_trace_event(struct probe_trace_event *tev,
2492 struct strfilter *filter)
2496 /* At first, check the event name itself */
2497 if (strfilter__compare(filter, tev->event))
2500 /* Next, check the combination of name and group */
2501 if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0)
2503 return strfilter__compare(filter, tmp);
2506 static int __show_perf_probe_events(int fd, bool is_kprobe,
2507 struct strfilter *filter)
2510 struct probe_trace_event tev;
2511 struct perf_probe_event pev;
2512 struct strlist *rawlist;
2513 struct str_node *ent;
2515 memset(&tev, 0, sizeof(tev));
2516 memset(&pev, 0, sizeof(pev));
2518 rawlist = probe_file__get_rawlist(fd);
2522 strlist__for_each_entry(ent, rawlist) {
2523 ret = parse_probe_trace_command(ent->s, &tev);
2525 if (!filter_probe_trace_event(&tev, filter))
2527 ret = convert_to_perf_probe_event(&tev, &pev,
2531 ret = show_perf_probe_event(pev.group, pev.event,
2532 &pev, tev.point.module,
2536 clear_perf_probe_event(&pev);
2537 clear_probe_trace_event(&tev);
2541 strlist__delete(rawlist);
2542 /* Cleanup cached debuginfo if needed */
2543 debuginfo_cache__exit();
2548 /* List up current perf-probe events */
2549 int show_perf_probe_events(struct strfilter *filter)
2551 int kp_fd, up_fd, ret;
2555 if (probe_conf.cache)
2556 return probe_cache__show_all_caches(filter);
2558 ret = init_probe_symbol_maps(false);
2562 ret = probe_file__open_both(&kp_fd, &up_fd, 0);
2567 ret = __show_perf_probe_events(kp_fd, true, filter);
2568 if (up_fd >= 0 && ret >= 0)
2569 ret = __show_perf_probe_events(up_fd, false, filter);
2574 exit_probe_symbol_maps();
2579 static int get_new_event_name(char *buf, size_t len, const char *base,
2580 struct strlist *namelist, bool ret_event,
2588 nbase = strdup(base);
2592 /* Cut off the dot suffixes (e.g. .const, .isra) and version suffixes */
2593 p = strpbrk(nbase, ".@");
2594 if (p && p != nbase)
2597 /* Try no suffix number */
2598 ret = e_snprintf(buf, len, "%s%s", nbase, ret_event ? "__return" : "");
2600 pr_debug("snprintf() failed: %d\n", ret);
2603 if (!strlist__has_entry(namelist, buf))
2606 if (!allow_suffix) {
2607 pr_warning("Error: event \"%s\" already exists.\n"
2608 " Hint: Remove existing event by 'perf probe -d'\n"
2609 " or force duplicates by 'perf probe -f'\n"
2610 " or set 'force=yes' in BPF source.\n",
2616 /* Try to add suffix */
2617 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2618 ret = e_snprintf(buf, len, "%s_%d", nbase, i);
2620 pr_debug("snprintf() failed: %d\n", ret);
2623 if (!strlist__has_entry(namelist, buf))
2626 if (i == MAX_EVENT_INDEX) {
2627 pr_warning("Too many events are on the same function.\n");
2634 /* Final validation */
2635 if (ret >= 0 && !is_c_func_name(buf)) {
2636 pr_warning("Internal error: \"%s\" is an invalid event name.\n",
2644 /* Warn if the current kernel's uprobe implementation is old */
2645 static void warn_uprobe_event_compat(struct probe_trace_event *tev)
2648 char *buf = synthesize_probe_trace_command(tev);
2650 /* Old uprobe event doesn't support memory dereference */
2651 if (!tev->uprobes || tev->nargs == 0 || !buf)
2654 for (i = 0; i < tev->nargs; i++)
2655 if (strglobmatch(tev->args[i].value, "[$@+-]*")) {
2656 pr_warning("Please upgrade your kernel to at least "
2657 "3.14 to have access to feature %s\n",
2658 tev->args[i].value);
2665 /* Set new name from original perf_probe_event and namelist */
2666 static int probe_trace_event__set_name(struct probe_trace_event *tev,
2667 struct perf_probe_event *pev,
2668 struct strlist *namelist,
2671 const char *event, *group;
2675 /* If probe_event or trace_event already have the name, reuse it */
2676 if (pev->event && !pev->sdt)
2678 else if (tev->event)
2681 /* Or generate new one from probe point */
2682 if (pev->point.function &&
2683 (strncmp(pev->point.function, "0x", 2) != 0) &&
2684 !strisglob(pev->point.function))
2685 event = pev->point.function;
2687 event = tev->point.realname;
2689 if (pev->group && !pev->sdt)
2691 else if (tev->group)
2694 group = PERFPROBE_GROUP;
2696 /* Get an unused new event name */
2697 ret = get_new_event_name(buf, 64, event, namelist,
2698 tev->point.retprobe, allow_suffix);
2704 tev->event = strdup(event);
2705 tev->group = strdup(group);
2706 if (tev->event == NULL || tev->group == NULL)
2709 /* Add added event name to namelist */
2710 strlist__add(namelist, event);
2714 static int __open_probe_file_and_namelist(bool uprobe,
2715 struct strlist **namelist)
2719 fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0));
2723 /* Get current event names */
2724 *namelist = probe_file__get_namelist(fd);
2726 pr_debug("Failed to get current event list.\n");
2733 static int __add_probe_trace_events(struct perf_probe_event *pev,
2734 struct probe_trace_event *tevs,
2735 int ntevs, bool allow_suffix)
2737 int i, fd[2] = {-1, -1}, up, ret;
2738 struct probe_trace_event *tev = NULL;
2739 struct probe_cache *cache = NULL;
2740 struct strlist *namelist[2] = {NULL, NULL};
2741 struct nscookie nsc;
2743 up = pev->uprobes ? 1 : 0;
2744 fd[up] = __open_probe_file_and_namelist(up, &namelist[up]);
2749 for (i = 0; i < ntevs; i++) {
2751 up = tev->uprobes ? 1 : 0;
2752 if (fd[up] == -1) { /* Open the kprobe/uprobe_events */
2753 fd[up] = __open_probe_file_and_namelist(up,
2758 /* Skip if the symbol is out of .text or blacklisted */
2759 if (!tev->point.symbol && !pev->uprobes)
2762 /* Set new name for tev (and update namelist) */
2763 ret = probe_trace_event__set_name(tev, pev, namelist[up],
2768 nsinfo__mountns_enter(pev->nsi, &nsc);
2769 ret = probe_file__add_event(fd[up], tev);
2770 nsinfo__mountns_exit(&nsc);
2775 * Probes after the first probe which comes from same
2776 * user input are always allowed to add suffix, because
2777 * there might be several addresses corresponding to
2780 allow_suffix = true;
2782 if (ret == -EINVAL && pev->uprobes)
2783 warn_uprobe_event_compat(tev);
2784 if (ret == 0 && probe_conf.cache) {
2785 cache = probe_cache__new(pev->target, pev->nsi);
2787 probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 ||
2788 probe_cache__commit(cache) < 0)
2789 pr_warning("Failed to add event to probe cache\n");
2790 probe_cache__delete(cache);
2794 for (up = 0; up < 2; up++) {
2795 strlist__delete(namelist[up]);
2802 static int find_probe_functions(struct map *map, char *name,
2803 struct symbol **syms)
2807 struct rb_node *tmp;
2808 const char *norm, *ver;
2810 bool cut_version = true;
2812 if (map__load(map) < 0)
2815 /* If user gives a version, don't cut off the version from symbols */
2816 if (strchr(name, '@'))
2817 cut_version = false;
2819 map__for_each_symbol(map, sym, tmp) {
2820 norm = arch__normalize_symbol_name(sym->name);
2825 /* We don't care about default symbol or not */
2826 ver = strchr(norm, '@');
2828 buf = strndup(norm, ver - norm);
2835 if (strglobmatch(norm, name)) {
2837 if (syms && found < probe_conf.max_probes)
2838 syms[found - 1] = sym;
2847 void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused,
2848 struct probe_trace_event *tev __maybe_unused,
2849 struct map *map __maybe_unused,
2850 struct symbol *sym __maybe_unused) { }
2853 * Find probe function addresses from map.
2854 * Return an error or the number of found probe_trace_event
2856 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2857 struct probe_trace_event **tevs)
2859 struct map *map = NULL;
2860 struct ref_reloc_sym *reloc_sym = NULL;
2862 struct symbol **syms = NULL;
2863 struct probe_trace_event *tev;
2864 struct perf_probe_point *pp = &pev->point;
2865 struct probe_trace_point *tp;
2866 int num_matched_functions;
2867 int ret, i, j, skipped = 0;
2870 map = get_target_map(pev->target, pev->nsi, pev->uprobes);
2876 syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes);
2883 * Load matched symbols: Since the different local symbols may have
2884 * same name but different addresses, this lists all the symbols.
2886 num_matched_functions = find_probe_functions(map, pp->function, syms);
2887 if (num_matched_functions <= 0) {
2888 pr_err("Failed to find symbol %s in %s\n", pp->function,
2889 pev->target ? : "kernel");
2892 } else if (num_matched_functions > probe_conf.max_probes) {
2893 pr_err("Too many functions matched in %s\n",
2894 pev->target ? : "kernel");
2899 /* Note that the symbols in the kmodule are not relocated */
2900 if (!pev->uprobes && !pev->target &&
2901 (!pp->retprobe || kretprobe_offset_is_supported())) {
2902 reloc_sym = kernel_get_ref_reloc_sym(NULL);
2904 pr_warning("Relocated base symbol is not found!\n");
2910 /* Setup result trace-probe-events */
2911 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2919 for (j = 0; j < num_matched_functions; j++) {
2922 tev = (*tevs) + ret;
2924 if (ret == num_matched_functions) {
2925 pr_warning("Too many symbols are listed. Skip it.\n");
2930 if (pp->offset > sym->end - sym->start) {
2931 pr_warning("Offset %ld is bigger than the size of %s\n",
2932 pp->offset, sym->name);
2936 /* Add one probe point */
2937 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2939 /* Check the kprobe (not in module) is within .text */
2940 if (!pev->uprobes && !pev->target &&
2941 kprobe_warn_out_range(sym->name, tp->address)) {
2942 tp->symbol = NULL; /* Skip it */
2944 } else if (reloc_sym) {
2945 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2946 tp->offset = tp->address - reloc_sym->addr;
2948 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2949 tp->offset = pp->offset;
2951 tp->realname = strdup_or_goto(sym->name, nomem_out);
2953 tp->retprobe = pp->retprobe;
2956 tev->point.module = strdup_or_goto(pev->target,
2959 mod_name = find_module_name(pev->target);
2961 strdup(mod_name ? mod_name : pev->target);
2963 if (!tev->point.module)
2967 tev->uprobes = pev->uprobes;
2968 tev->nargs = pev->nargs;
2970 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2972 if (tev->args == NULL)
2975 for (i = 0; i < tev->nargs; i++) {
2976 if (pev->args[i].name)
2978 strdup_or_goto(pev->args[i].name,
2981 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2983 if (pev->args[i].type)
2985 strdup_or_goto(pev->args[i].type,
2988 arch__fix_tev_from_maps(pev, tev, map, sym);
2990 if (ret == skipped) {
3003 clear_probe_trace_events(*tevs, num_matched_functions);
3008 static int try_to_find_absolute_address(struct perf_probe_event *pev,
3009 struct probe_trace_event **tevs)
3011 struct perf_probe_point *pp = &pev->point;
3012 struct probe_trace_event *tev;
3013 struct probe_trace_point *tp;
3016 if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2)))
3018 if (perf_probe_event_need_dwarf(pev))
3022 * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at
3025 * Only one tev can be generated by this.
3027 *tevs = zalloc(sizeof(*tev));
3035 * Don't use tp->offset, use address directly, because
3036 * in synthesize_probe_trace_command() address cannot be
3039 tp->address = pev->point.abs_address;
3040 tp->retprobe = pp->retprobe;
3041 tev->uprobes = pev->uprobes;
3045 * Give it a '0x' leading symbol name.
3046 * In __add_probe_trace_events, a NULL symbol is interpreted as
3049 if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0)
3052 /* For kprobe, check range */
3053 if ((!tev->uprobes) &&
3054 (kprobe_warn_out_range(tev->point.symbol,
3055 tev->point.address))) {
3060 if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0)
3064 tp->module = strdup(pev->target);
3070 tev->group = strdup(pev->group);
3076 tev->event = strdup(pev->event);
3081 tev->nargs = pev->nargs;
3082 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
3086 for (i = 0; i < tev->nargs; i++)
3087 copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]);
3092 clear_probe_trace_events(*tevs, 1);
3097 /* Concatinate two arrays */
3098 static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b)
3102 ret = malloc(sz_a + sz_b);
3104 memcpy(ret, a, sz_a);
3105 memcpy(ret + sz_a, b, sz_b);
3111 concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs,
3112 struct probe_trace_event **tevs2, int ntevs2)
3114 struct probe_trace_event *new_tevs;
3124 if (*ntevs + ntevs2 > probe_conf.max_probes)
3127 /* Concatinate the array of probe_trace_event */
3128 new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs),
3129 *tevs2, ntevs2 * sizeof(**tevs2));
3139 clear_probe_trace_events(*tevs2, ntevs2);
3146 * Try to find probe_trace_event from given probe caches. Return the number
3147 * of cached events found, if an error occurs return the error.
3149 static int find_cached_events(struct perf_probe_event *pev,
3150 struct probe_trace_event **tevs,
3153 struct probe_cache *cache;
3154 struct probe_cache_entry *entry;
3155 struct probe_trace_event *tmp_tevs = NULL;
3159 cache = probe_cache__new(target, pev->nsi);
3160 /* Return 0 ("not found") if the target has no probe cache. */
3164 for_each_probe_cache_entry(entry, cache) {
3165 /* Skip the cache entry which has no name */
3166 if (!entry->pev.event || !entry->pev.group)
3168 if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) &&
3169 strglobmatch(entry->pev.event, pev->event)) {
3170 ret = probe_cache_entry__get_event(entry, &tmp_tevs);
3172 ret = concat_probe_trace_events(tevs, &ntevs,
3178 probe_cache__delete(cache);
3180 clear_probe_trace_events(*tevs, ntevs);
3184 if (ntevs > 0 && target && target[0] == '/')
3185 pev->uprobes = true;
3191 /* Try to find probe_trace_event from all probe caches */
3192 static int find_cached_events_all(struct perf_probe_event *pev,
3193 struct probe_trace_event **tevs)
3195 struct probe_trace_event *tmp_tevs = NULL;
3196 struct strlist *bidlist;
3197 struct str_node *nd;
3202 /* Get the buildid list of all valid caches */
3203 bidlist = build_id_cache__list_all(true);
3206 pr_debug("Failed to get buildids: %d\n", ret);
3211 strlist__for_each_entry(nd, bidlist) {
3212 pathname = build_id_cache__origname(nd->s);
3213 ret = find_cached_events(pev, &tmp_tevs, pathname);
3214 /* In the case of cnt == 0, we just skip it */
3216 ret = concat_probe_trace_events(tevs, &ntevs,
3222 strlist__delete(bidlist);
3225 clear_probe_trace_events(*tevs, ntevs);
3233 static int find_probe_trace_events_from_cache(struct perf_probe_event *pev,
3234 struct probe_trace_event **tevs)
3236 struct probe_cache *cache;
3237 struct probe_cache_entry *entry;
3238 struct probe_trace_event *tev;
3239 struct str_node *node;
3243 /* For SDT/cached events, we use special search functions */
3245 return find_cached_events_all(pev, tevs);
3247 return find_cached_events(pev, tevs, pev->target);
3249 cache = probe_cache__new(pev->target, pev->nsi);
3253 entry = probe_cache__find(cache, pev);
3255 /* SDT must be in the cache */
3256 ret = pev->sdt ? -ENOENT : 0;
3260 ret = strlist__nr_entries(entry->tevlist);
3261 if (ret > probe_conf.max_probes) {
3262 pr_debug("Too many entries matched in the cache of %s\n",
3263 pev->target ? : "kernel");
3268 *tevs = zalloc(ret * sizeof(*tev));
3275 strlist__for_each_entry(node, entry->tevlist) {
3276 tev = &(*tevs)[i++];
3277 ret = parse_probe_trace_command(node->s, tev);
3280 /* Set the uprobes attribute as same as original */
3281 tev->uprobes = pev->uprobes;
3286 probe_cache__delete(cache);
3290 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
3291 struct probe_trace_event **tevs)
3295 if (!pev->group && !pev->sdt) {
3296 /* Set group name if not given */
3297 if (!pev->uprobes) {
3298 pev->group = strdup(PERFPROBE_GROUP);
3299 ret = pev->group ? 0 : -ENOMEM;
3301 ret = convert_exec_to_group(pev->target, &pev->group);
3303 pr_warning("Failed to make a group name.\n");
3308 ret = try_to_find_absolute_address(pev, tevs);
3312 /* At first, we need to lookup cache entry */
3313 ret = find_probe_trace_events_from_cache(pev, tevs);
3314 if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */
3315 return ret == 0 ? -ENOENT : ret; /* Found in probe cache */
3317 /* Convert perf_probe_event with debuginfo */
3318 ret = try_to_find_probe_trace_events(pev, tevs);
3320 return ret; /* Found in debuginfo or got an error */
3322 return find_probe_trace_events_from_map(pev, tevs);
3325 int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3329 /* Loop 1: convert all events */
3330 for (i = 0; i < npevs; i++) {
3331 /* Init kprobe blacklist if needed */
3332 if (!pevs[i].uprobes)
3333 kprobe_blacklist__init();
3334 /* Convert with or without debuginfo */
3335 ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs);
3338 pevs[i].ntevs = ret;
3340 /* This just release blacklist only if allocated */
3341 kprobe_blacklist__release();
3346 static int show_probe_trace_event(struct probe_trace_event *tev)
3348 char *buf = synthesize_probe_trace_command(tev);
3351 pr_debug("Failed to synthesize probe trace event.\n");
3355 /* Showing definition always go stdout */
3356 printf("%s\n", buf);
3362 int show_probe_trace_events(struct perf_probe_event *pevs, int npevs)
3364 struct strlist *namelist = strlist__new(NULL, NULL);
3365 struct probe_trace_event *tev;
3366 struct perf_probe_event *pev;
3372 for (j = 0; j < npevs && !ret; j++) {
3374 for (i = 0; i < pev->ntevs && !ret; i++) {
3375 tev = &pev->tevs[i];
3376 /* Skip if the symbol is out of .text or blacklisted */
3377 if (!tev->point.symbol && !pev->uprobes)
3380 /* Set new name for tev (and update namelist) */
3381 ret = probe_trace_event__set_name(tev, pev,
3384 ret = show_probe_trace_event(tev);
3387 strlist__delete(namelist);
3392 int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3396 /* Loop 2: add all events */
3397 for (i = 0; i < npevs; i++) {
3398 ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs,
3400 probe_conf.force_add);
3407 void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3410 struct perf_probe_event *pev;
3412 /* Loop 3: cleanup and free trace events */
3413 for (i = 0; i < npevs; i++) {
3415 for (j = 0; j < pevs[i].ntevs; j++)
3416 clear_probe_trace_event(&pevs[i].tevs[j]);
3417 zfree(&pevs[i].tevs);
3419 nsinfo__zput(pev->nsi);
3420 clear_perf_probe_event(&pevs[i]);
3424 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs)
3428 ret = init_probe_symbol_maps(pevs->uprobes);
3432 ret = convert_perf_probe_events(pevs, npevs);
3434 ret = apply_perf_probe_events(pevs, npevs);
3436 cleanup_perf_probe_events(pevs, npevs);
3438 exit_probe_symbol_maps();
3442 int del_perf_probe_events(struct strfilter *filter)
3444 int ret, ret2, ufd = -1, kfd = -1;
3445 char *str = strfilter__string(filter);
3450 /* Get current event names */
3451 ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
3455 ret = probe_file__del_events(kfd, filter);
3456 if (ret < 0 && ret != -ENOENT)
3459 ret2 = probe_file__del_events(ufd, filter);
3460 if (ret2 < 0 && ret2 != -ENOENT) {
3477 int show_available_funcs(const char *target, struct nsinfo *nsi,
3478 struct strfilter *_filter, bool user)
3484 ret = init_probe_symbol_maps(user);
3488 /* Get a symbol map */
3489 map = get_target_map(target, nsi, user);
3491 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
3495 ret = map__load(map);
3498 char *str = strfilter__string(_filter);
3499 pr_err("Failed to find symbols matched to \"%s\"\n",
3503 pr_err("Failed to load symbols in %s\n",
3504 (target) ? : "kernel");
3507 if (!dso__sorted_by_name(map->dso))
3508 dso__sort_by_name(map->dso);
3510 /* Show all (filtered) symbols */
3513 for (nd = rb_first(&map->dso->symbol_names); nd; nd = rb_next(nd)) {
3514 struct symbol_name_rb_node *pos = rb_entry(nd, struct symbol_name_rb_node, rb_node);
3516 if (strfilter__compare(_filter, pos->sym.name))
3517 printf("%s\n", pos->sym.name);
3521 exit_probe_symbol_maps();
3526 int copy_to_probe_trace_arg(struct probe_trace_arg *tvar,
3527 struct perf_probe_arg *pvar)
3529 tvar->value = strdup(pvar->var);
3530 if (tvar->value == NULL)
3533 tvar->type = strdup(pvar->type);
3534 if (tvar->type == NULL)
3538 tvar->name = strdup(pvar->name);
3539 if (tvar->name == NULL)