2 * probe-event.c : perf-probe definition to probe_events format converter
4 * Written by Masami Hiramatsu <mhiramat@redhat.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include <sys/utsname.h>
23 #include <sys/types.h>
43 #include <api/fs/debugfs.h>
44 #include "trace-event.h" /* For __maybe_unused */
45 #include "probe-event.h"
46 #include "probe-finder.h"
49 #define MAX_CMDLEN 256
50 #define PERFPROBE_GROUP "probe"
52 bool probe_event_dry_run; /* Dry run flag */
54 #define semantic_error(msg ...) pr_err("Semantic error :" msg)
56 /* If there is no space to write, returns -E2BIG. */
57 static int e_snprintf(char *str, size_t size, const char *format, ...)
58 __attribute__((format(printf, 3, 4)));
60 static int e_snprintf(char *str, size_t size, const char *format, ...)
65 ret = vsnprintf(str, size, format, ap);
72 static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
73 static void clear_probe_trace_event(struct probe_trace_event *tev);
74 static struct machine *host_machine;
76 /* Initialize symbol maps and path of vmlinux/modules */
77 static int init_symbol_maps(bool user_only)
81 symbol_conf.sort_by_name = true;
82 ret = symbol__init(NULL);
84 pr_debug("Failed to init symbol map.\n");
88 if (host_machine || user_only) /* already initialized */
91 if (symbol_conf.vmlinux_name)
92 pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name);
94 host_machine = machine__new_host();
96 pr_debug("machine__new_host() failed.\n");
102 pr_warning("Failed to init vmlinux path.\n");
106 static void exit_symbol_maps(void)
109 machine__delete(host_machine);
115 static struct symbol *__find_kernel_function_by_name(const char *name,
118 return machine__find_kernel_function_by_name(host_machine, name, mapp,
122 static struct symbol *__find_kernel_function(u64 addr, struct map **mapp)
124 return machine__find_kernel_function(host_machine, addr, mapp, NULL);
127 static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void)
129 /* kmap->ref_reloc_sym should be set if host_machine is initialized */
132 if (map__load(host_machine->vmlinux_maps[MAP__FUNCTION], NULL) < 0)
135 kmap = map__kmap(host_machine->vmlinux_maps[MAP__FUNCTION]);
136 return kmap->ref_reloc_sym;
139 static u64 kernel_get_symbol_address_by_name(const char *name, bool reloc)
141 struct ref_reloc_sym *reloc_sym;
145 /* ref_reloc_sym is just a label. Need a special fix*/
146 reloc_sym = kernel_get_ref_reloc_sym();
147 if (reloc_sym && strcmp(name, reloc_sym->name) == 0)
148 return (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr;
150 sym = __find_kernel_function_by_name(name, &map);
152 return map->unmap_ip(map, sym->start) -
153 (reloc) ? 0 : map->reloc;
158 static struct map *kernel_get_module_map(const char *module)
161 struct map_groups *grp = &host_machine->kmaps;
163 /* A file path -- this is an offline module */
164 if (module && strchr(module, '/'))
165 return machine__new_module(host_machine, 0, module);
170 for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) {
171 struct map *pos = rb_entry(nd, struct map, rb_node);
172 if (strncmp(pos->dso->short_name + 1, module,
173 pos->dso->short_name_len - 2) == 0) {
180 static struct dso *kernel_get_module_dso(const char *module)
184 const char *vmlinux_name;
187 list_for_each_entry(dso, &host_machine->kernel_dsos, node) {
188 if (strncmp(dso->short_name + 1, module,
189 dso->short_name_len - 2) == 0)
192 pr_debug("Failed to find module %s.\n", module);
196 map = host_machine->vmlinux_maps[MAP__FUNCTION];
199 vmlinux_name = symbol_conf.vmlinux_name;
201 if (dso__load_vmlinux(dso, map, vmlinux_name, false, NULL) <= 0)
204 if (dso__load_vmlinux_path(dso, map, NULL) <= 0) {
205 pr_debug("Failed to load kernel map.\n");
213 const char *kernel_get_module_path(const char *module)
215 struct dso *dso = kernel_get_module_dso(module);
216 return (dso) ? dso->long_name : NULL;
219 static int convert_exec_to_group(const char *exec, char **result)
221 char *ptr1, *ptr2, *exec_copy;
225 exec_copy = strdup(exec);
229 ptr1 = basename(exec_copy);
235 ptr2 = strpbrk(ptr1, "-._");
238 ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1);
242 *result = strdup(buf);
243 ret = *result ? 0 : -ENOMEM;
250 static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs)
254 for (i = 0; i < ntevs; i++)
255 clear_probe_trace_event(tevs + i);
258 #ifdef HAVE_DWARF_SUPPORT
260 /* Open new debuginfo of given module */
261 static struct debuginfo *open_debuginfo(const char *module, bool silent)
263 const char *path = module;
264 struct debuginfo *ret;
266 if (!module || !strchr(module, '/')) {
267 path = kernel_get_module_path(module);
270 pr_err("Failed to find path of %s module.\n",
275 ret = debuginfo__new(path);
276 if (!ret && !silent) {
277 pr_warning("The %s file has no debug information.\n", path);
278 if (!module || !strtailcmp(path, ".ko"))
279 pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, ");
281 pr_warning("Rebuild with -g, ");
282 pr_warning("or install an appropriate debuginfo package.\n");
288 static int get_text_start_address(const char *exec, unsigned long *address)
293 int fd, ret = -ENOENT;
295 fd = open(exec, O_RDONLY);
299 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
303 if (gelf_getehdr(elf, &ehdr) == NULL)
306 if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL))
309 *address = shdr.sh_addr - shdr.sh_offset;
317 * Convert trace point to probe point with debuginfo
319 static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
320 struct perf_probe_point *pp,
323 struct debuginfo *dinfo = NULL;
324 unsigned long stext = 0;
325 u64 addr = tp->address;
328 /* convert the address to dwarf address */
334 ret = get_text_start_address(tp->module, &stext);
339 addr = kernel_get_symbol_address_by_name(tp->symbol, false);
345 pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
346 tp->module ? : "kernel");
348 dinfo = open_debuginfo(tp->module, verbose == 0);
350 ret = debuginfo__find_probe_point(dinfo,
351 (unsigned long)addr, pp);
352 debuginfo__delete(dinfo);
357 pp->retprobe = tp->retprobe;
361 pr_debug("Failed to find corresponding probes from debuginfo.\n");
362 return ret ? : -ENOENT;
365 static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
366 int ntevs, const char *exec)
369 unsigned long stext = 0;
374 ret = get_text_start_address(exec, &stext);
378 for (i = 0; i < ntevs && ret >= 0; i++) {
379 /* point.address is the addres of point.symbol + point.offset */
380 tevs[i].point.address -= stext;
381 tevs[i].point.module = strdup(exec);
382 if (!tevs[i].point.module) {
386 tevs[i].uprobes = true;
392 static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
393 int ntevs, const char *module)
401 tmp = strrchr(module, '/');
403 /* This is a module path -- get the module name */
404 module = strdup(tmp + 1);
407 tmp = strchr(module, '.');
410 tmp = (char *)module; /* For free() */
413 for (i = 0; i < ntevs; i++) {
414 tevs[i].point.module = strdup(module);
415 if (!tevs[i].point.module) {
425 /* Post processing the probe events */
426 static int post_process_probe_trace_events(struct probe_trace_event *tevs,
427 int ntevs, const char *module,
430 struct ref_reloc_sym *reloc_sym;
435 return add_exec_to_probe_trace_events(tevs, ntevs, module);
437 /* Note that currently ref_reloc_sym based probe is not for drivers */
439 return add_module_to_probe_trace_events(tevs, ntevs, module);
441 reloc_sym = kernel_get_ref_reloc_sym();
443 pr_warning("Relocated base symbol is not found!\n");
447 for (i = 0; i < ntevs; i++) {
448 if (tevs[i].point.address) {
449 tmp = strdup(reloc_sym->name);
452 free(tevs[i].point.symbol);
453 tevs[i].point.symbol = tmp;
454 tevs[i].point.offset = tevs[i].point.address -
455 reloc_sym->unrelocated_addr;
461 /* Try to find perf_probe_event with debuginfo */
462 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
463 struct probe_trace_event **tevs,
464 int max_tevs, const char *target)
466 bool need_dwarf = perf_probe_event_need_dwarf(pev);
467 struct debuginfo *dinfo;
470 dinfo = open_debuginfo(target, !need_dwarf);
475 pr_debug("Could not open debuginfo. Try to use symbols.\n");
479 pr_debug("Try to find probe point from debuginfo.\n");
480 /* Searching trace events corresponding to a probe event */
481 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs);
483 debuginfo__delete(dinfo);
485 if (ntevs > 0) { /* Succeeded to find trace events */
486 pr_debug("Found %d probe_trace_events.\n", ntevs);
487 ret = post_process_probe_trace_events(*tevs, ntevs,
488 target, pev->uprobes);
490 clear_probe_trace_events(*tevs, ntevs);
493 return ret < 0 ? ret : ntevs;
496 if (ntevs == 0) { /* No error but failed to find probe point. */
497 pr_warning("Probe point '%s' not found.\n",
498 synthesize_perf_probe_point(&pev->point));
501 /* Error path : ntevs < 0 */
502 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
503 if (ntevs == -EBADF) {
504 pr_warning("Warning: No dwarf info found in the vmlinux - "
505 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
507 pr_debug("Trying to use symbols.\n");
515 * Find a src file from a DWARF tag path. Prepend optional source path prefix
516 * and chop off leading directories that do not exist. Result is passed back as
517 * a newly allocated path on success.
518 * Return 0 if file was found and readable, -errno otherwise.
520 static int get_real_path(const char *raw_path, const char *comp_dir,
523 const char *prefix = symbol_conf.source_prefix;
526 if (raw_path[0] != '/' && comp_dir)
527 /* If not an absolute path, try to use comp_dir */
530 if (access(raw_path, R_OK) == 0) {
531 *new_path = strdup(raw_path);
538 *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2));
543 sprintf(*new_path, "%s/%s", prefix, raw_path);
545 if (access(*new_path, R_OK) == 0)
548 if (!symbol_conf.source_prefix)
549 /* In case of searching comp_dir, don't retry */
557 raw_path = strchr(++raw_path, '/');
571 #define LINEBUF_SIZE 256
572 #define NR_ADDITIONAL_LINES 2
574 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
576 char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE];
577 const char *color = show_num ? "" : PERF_COLOR_BLUE;
578 const char *prefix = NULL;
581 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
586 prefix = show_num ? "%7d " : " ";
587 color_fprintf(stdout, color, prefix, l);
589 color_fprintf(stdout, color, "%s", buf);
591 } while (strchr(buf, '\n') == NULL);
596 pr_warning("File read error: %s\n",
597 strerror_r(errno, sbuf, sizeof(sbuf)));
603 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
605 int rv = __show_one_line(fp, l, skip, show_num);
607 pr_warning("Source file is shorter than expected.\n");
613 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
614 #define show_one_line(f,l) _show_one_line(f,l,false,false)
615 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
616 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
619 * Show line-range always requires debuginfo to find source file and
622 static int __show_line_range(struct line_range *lr, const char *module)
626 struct debuginfo *dinfo;
630 char sbuf[STRERR_BUFSIZE];
632 /* Search a line range */
633 dinfo = open_debuginfo(module, false);
637 ret = debuginfo__find_line_range(dinfo, lr);
638 debuginfo__delete(dinfo);
639 if (ret == 0 || ret == -ENOENT) {
640 pr_warning("Specified source line is not found.\n");
642 } else if (ret < 0) {
643 pr_warning("Debuginfo analysis failed.\n");
647 /* Convert source file path */
649 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
650 free(tmp); /* Free old path */
652 pr_warning("Failed to find source file path.\n");
659 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
660 lr->start - lr->offset);
662 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
664 fp = fopen(lr->path, "r");
666 pr_warning("Failed to open %s: %s\n", lr->path,
667 strerror_r(errno, sbuf, sizeof(sbuf)));
670 /* Skip to starting line number */
671 while (l < lr->start) {
672 ret = skip_one_line(fp, l++);
677 intlist__for_each(ln, lr->line_list) {
678 for (; ln->i > l; l++) {
679 ret = show_one_line(fp, l - lr->offset);
683 ret = show_one_line_with_num(fp, l++ - lr->offset);
688 if (lr->end == INT_MAX)
689 lr->end = l + NR_ADDITIONAL_LINES;
690 while (l <= lr->end) {
691 ret = show_one_line_or_eof(fp, l++ - lr->offset);
700 int show_line_range(struct line_range *lr, const char *module, bool user)
704 ret = init_symbol_maps(user);
707 ret = __show_line_range(lr, module);
713 static int show_available_vars_at(struct debuginfo *dinfo,
714 struct perf_probe_event *pev,
715 int max_vls, struct strfilter *_filter,
720 struct str_node *node;
721 struct variable_list *vls = NULL, *vl;
724 buf = synthesize_perf_probe_point(&pev->point);
727 pr_debug("Searching variables at %s\n", buf);
729 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls,
732 if (ret == 0 || ret == -ENOENT) {
733 pr_err("Failed to find the address of %s\n", buf);
736 pr_warning("Debuginfo analysis failed.\n");
740 /* Some variables are found */
741 fprintf(stdout, "Available variables at %s\n", buf);
742 for (i = 0; i < ret; i++) {
745 * A probe point might be converted to
746 * several trace points.
748 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
750 zfree(&vl->point.symbol);
753 strlist__for_each(node, vl->vars) {
754 var = strchr(node->s, '\t') + 1;
755 if (strfilter__compare(_filter, var)) {
756 fprintf(stdout, "\t\t%s\n", node->s);
760 strlist__delete(vl->vars);
763 fprintf(stdout, "\t\t(No matched variables)\n");
771 /* Show available variables on given probe point */
772 int show_available_vars(struct perf_probe_event *pevs, int npevs,
773 int max_vls, const char *module,
774 struct strfilter *_filter, bool externs)
777 struct debuginfo *dinfo;
779 ret = init_symbol_maps(pevs->uprobes);
783 dinfo = open_debuginfo(module, false);
791 for (i = 0; i < npevs && ret >= 0; i++)
792 ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter,
795 debuginfo__delete(dinfo);
801 #else /* !HAVE_DWARF_SUPPORT */
804 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
805 struct perf_probe_point *pp __maybe_unused,
806 bool is_kprobe __maybe_unused)
811 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
812 struct probe_trace_event **tevs __maybe_unused,
813 int max_tevs __maybe_unused,
814 const char *target __maybe_unused)
816 if (perf_probe_event_need_dwarf(pev)) {
817 pr_warning("Debuginfo-analysis is not supported.\n");
824 int show_line_range(struct line_range *lr __maybe_unused,
825 const char *module __maybe_unused,
826 bool user __maybe_unused)
828 pr_warning("Debuginfo-analysis is not supported.\n");
832 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
833 int npevs __maybe_unused, int max_vls __maybe_unused,
834 const char *module __maybe_unused,
835 struct strfilter *filter __maybe_unused,
836 bool externs __maybe_unused)
838 pr_warning("Debuginfo-analysis is not supported.\n");
843 void line_range__clear(struct line_range *lr)
849 intlist__delete(lr->line_list);
850 memset(lr, 0, sizeof(*lr));
853 int line_range__init(struct line_range *lr)
855 memset(lr, 0, sizeof(*lr));
856 lr->line_list = intlist__new(NULL);
863 static int parse_line_num(char **ptr, int *val, const char *what)
865 const char *start = *ptr;
868 *val = strtol(*ptr, ptr, 0);
869 if (errno || *ptr == start) {
870 semantic_error("'%s' is not a valid number.\n", what);
877 * Stuff 'lr' according to the line range described by 'arg'.
878 * The line range syntax is described by:
880 * SRC[:SLN[+NUM|-ELN]]
881 * FNC[@SRC][:SLN[+NUM|-ELN]]
883 int parse_line_range_desc(const char *arg, struct line_range *lr)
885 char *range, *file, *name = strdup(arg);
894 range = strchr(name, ':');
898 err = parse_line_num(&range, &lr->start, "start line");
902 if (*range == '+' || *range == '-') {
903 const char c = *range++;
905 err = parse_line_num(&range, &lr->end, "end line");
910 lr->end += lr->start;
912 * Adjust the number of lines here.
913 * If the number of lines == 1, the
914 * the end of line should be equal to
921 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
924 if (lr->start > lr->end) {
925 semantic_error("Start line must be smaller"
926 " than end line.\n");
929 if (*range != '\0') {
930 semantic_error("Tailing with invalid str '%s'.\n", range);
935 file = strchr(name, '@');
938 lr->file = strdup(++file);
939 if (lr->file == NULL) {
944 } else if (strchr(name, '.'))
955 /* Check the name is good for event/group */
956 static bool check_event_name(const char *name)
958 if (!isalpha(*name) && *name != '_')
960 while (*++name != '\0') {
961 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
967 /* Parse probepoint definition. */
968 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
970 struct perf_probe_point *pp = &pev->point;
975 * perf probe [EVENT=]SRC[:LN|;PTN]
976 * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
978 * TODO:Group name support
981 ptr = strpbrk(arg, ";=@+%");
982 if (ptr && *ptr == '=') { /* Event name */
985 if (strchr(arg, ':')) {
986 semantic_error("Group name is not supported yet.\n");
989 if (!check_event_name(arg)) {
990 semantic_error("%s is bad for event name -it must "
991 "follow C symbol-naming rule.\n", arg);
994 pev->event = strdup(arg);
995 if (pev->event == NULL)
1001 ptr = strpbrk(arg, ";:+@%");
1011 /* Check arg is function or file and copy it */
1012 if (strchr(tmp, '.')) /* File */
1017 /* Parse other options */
1021 if (c == ';') { /* Lazy pattern must be the last part */
1022 pp->lazy_line = strdup(arg);
1023 if (pp->lazy_line == NULL)
1027 ptr = strpbrk(arg, ";:+@%");
1033 case ':': /* Line number */
1034 pp->line = strtoul(arg, &tmp, 0);
1036 semantic_error("There is non-digit char"
1037 " in line number.\n");
1041 case '+': /* Byte offset from a symbol */
1042 pp->offset = strtoul(arg, &tmp, 0);
1044 semantic_error("There is non-digit character"
1049 case '@': /* File name */
1051 semantic_error("SRC@SRC is not allowed.\n");
1054 pp->file = strdup(arg);
1055 if (pp->file == NULL)
1058 case '%': /* Probe places */
1059 if (strcmp(arg, "return") == 0) {
1061 } else { /* Others not supported yet */
1062 semantic_error("%%%s is not supported.\n", arg);
1066 default: /* Buggy case */
1067 pr_err("This program has a bug at %s:%d.\n",
1068 __FILE__, __LINE__);
1074 /* Exclusion check */
1075 if (pp->lazy_line && pp->line) {
1076 semantic_error("Lazy pattern can't be used with"
1081 if (pp->lazy_line && pp->offset) {
1082 semantic_error("Lazy pattern can't be used with offset.\n");
1086 if (pp->line && pp->offset) {
1087 semantic_error("Offset can't be used with line number.\n");
1091 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1092 semantic_error("File always requires line number or "
1097 if (pp->offset && !pp->function) {
1098 semantic_error("Offset requires an entry function.\n");
1102 if (pp->retprobe && !pp->function) {
1103 semantic_error("Return probe requires an entry function.\n");
1107 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1108 semantic_error("Offset/Line/Lazy pattern can't be used with "
1113 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1114 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1119 /* Parse perf-probe event argument */
1120 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1122 char *tmp, *goodname;
1123 struct perf_probe_arg_field **fieldp;
1125 pr_debug("parsing arg: %s into ", str);
1127 tmp = strchr(str, '=');
1129 arg->name = strndup(str, tmp - str);
1130 if (arg->name == NULL)
1132 pr_debug("name:%s ", arg->name);
1136 tmp = strchr(str, ':');
1137 if (tmp) { /* Type setting */
1139 arg->type = strdup(tmp + 1);
1140 if (arg->type == NULL)
1142 pr_debug("type:%s ", arg->type);
1145 tmp = strpbrk(str, "-.[");
1146 if (!is_c_varname(str) || !tmp) {
1147 /* A variable, register, symbol or special value */
1148 arg->var = strdup(str);
1149 if (arg->var == NULL)
1151 pr_debug("%s\n", arg->var);
1155 /* Structure fields or array element */
1156 arg->var = strndup(str, tmp - str);
1157 if (arg->var == NULL)
1159 goodname = arg->var;
1160 pr_debug("%s, ", arg->var);
1161 fieldp = &arg->field;
1164 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1165 if (*fieldp == NULL)
1167 if (*tmp == '[') { /* Array */
1169 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1170 (*fieldp)->ref = true;
1171 if (*tmp != ']' || tmp == str + 1) {
1172 semantic_error("Array index must be a"
1179 } else { /* Structure */
1182 (*fieldp)->ref = false;
1183 } else if (tmp[1] == '>') {
1185 (*fieldp)->ref = true;
1187 semantic_error("Argument parse error: %s\n",
1191 tmp = strpbrk(str, "-.[");
1194 (*fieldp)->name = strndup(str, tmp - str);
1195 if ((*fieldp)->name == NULL)
1198 goodname = (*fieldp)->name;
1199 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1200 fieldp = &(*fieldp)->next;
1203 (*fieldp)->name = strdup(str);
1204 if ((*fieldp)->name == NULL)
1207 goodname = (*fieldp)->name;
1208 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1210 /* If no name is specified, set the last field name (not array index)*/
1212 arg->name = strdup(goodname);
1213 if (arg->name == NULL)
1219 /* Parse perf-probe event command */
1220 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1223 int argc, i, ret = 0;
1225 argv = argv_split(cmd, &argc);
1227 pr_debug("Failed to split arguments.\n");
1230 if (argc - 1 > MAX_PROBE_ARGS) {
1231 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1235 /* Parse probe point */
1236 ret = parse_perf_probe_point(argv[0], pev);
1240 /* Copy arguments and ensure return probe has no C argument */
1241 pev->nargs = argc - 1;
1242 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1243 if (pev->args == NULL) {
1247 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1248 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1250 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1251 semantic_error("You can't specify local variable for"
1262 /* Return true if this perf_probe_event requires debuginfo */
1263 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1267 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1270 for (i = 0; i < pev->nargs; i++)
1271 if (is_c_varname(pev->args[i].var))
1277 /* Parse probe_events event into struct probe_point */
1278 static int parse_probe_trace_command(const char *cmd,
1279 struct probe_trace_event *tev)
1281 struct probe_trace_point *tp = &tev->point;
1284 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1288 pr_debug("Parsing probe_events: %s\n", cmd);
1289 argv = argv_split(cmd, &argc);
1291 pr_debug("Failed to split arguments.\n");
1295 semantic_error("Too few probe arguments.\n");
1300 /* Scan event and group name. */
1301 argv0_str = strdup(argv[0]);
1302 if (argv0_str == NULL) {
1306 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1307 fmt2_str = strtok_r(NULL, "/", &fmt);
1308 fmt3_str = strtok_r(NULL, " \t", &fmt);
1309 if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
1310 || fmt3_str == NULL) {
1311 semantic_error("Failed to parse event name: %s\n", argv[0]);
1316 tev->group = strdup(fmt2_str);
1317 tev->event = strdup(fmt3_str);
1318 if (tev->group == NULL || tev->event == NULL) {
1322 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1324 tp->retprobe = (pr == 'r');
1326 /* Scan module name(if there), function name and offset */
1327 p = strchr(argv[1], ':');
1329 tp->module = strndup(argv[1], p - argv[1]);
1333 fmt1_str = strtok_r(p, "+", &fmt);
1334 if (fmt1_str[0] == '0') /* only the address started with 0x */
1335 tp->address = strtoul(fmt1_str, NULL, 0);
1337 /* Only the symbol-based probe has offset */
1338 tp->symbol = strdup(fmt1_str);
1339 if (tp->symbol == NULL) {
1343 fmt2_str = strtok_r(NULL, "", &fmt);
1344 if (fmt2_str == NULL)
1347 tp->offset = strtoul(fmt2_str, NULL, 10);
1350 tev->nargs = argc - 2;
1351 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1352 if (tev->args == NULL) {
1356 for (i = 0; i < tev->nargs; i++) {
1357 p = strchr(argv[i + 2], '=');
1358 if (p) /* We don't need which register is assigned. */
1362 tev->args[i].name = strdup(argv[i + 2]);
1363 /* TODO: parse regs and offset */
1364 tev->args[i].value = strdup(p);
1365 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1377 /* Compose only probe arg */
1378 int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len)
1380 struct perf_probe_arg_field *field = pa->field;
1384 if (pa->name && pa->var)
1385 ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var);
1387 ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var);
1394 if (field->name[0] == '[')
1395 ret = e_snprintf(tmp, len, "%s", field->name);
1397 ret = e_snprintf(tmp, len, "%s%s",
1398 field->ref ? "->" : ".", field->name);
1403 field = field->next;
1407 ret = e_snprintf(tmp, len, ":%s", pa->type);
1416 pr_debug("Failed to synthesize perf probe argument: %d\n", ret);
1420 /* Compose only probe point (not argument) */
1421 static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1424 char offs[32] = "", line[32] = "", file[32] = "";
1427 buf = zalloc(MAX_CMDLEN);
1433 ret = e_snprintf(offs, 32, "+%lu", pp->offset);
1438 ret = e_snprintf(line, 32, ":%d", pp->line);
1446 tmp = strchr(pp->file + len - 30, '/');
1447 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1449 ret = e_snprintf(file, 32, "@%s", tmp);
1455 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function,
1456 offs, pp->retprobe ? "%return" : "", line,
1459 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line);
1465 pr_debug("Failed to synthesize perf probe point: %d\n", ret);
1471 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1476 buf = synthesize_perf_probe_point(&pev->point);
1481 for (i = 0; i < pev->nargs; i++) {
1482 ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
1495 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1496 char **buf, size_t *buflen,
1501 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1507 ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset);
1519 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1520 char *buf, size_t buflen)
1522 struct probe_trace_arg_ref *ref = arg->ref;
1526 /* Argument name or separator */
1528 ret = e_snprintf(buf, buflen, " %s=", arg->name);
1530 ret = e_snprintf(buf, buflen, " ");
1536 /* Special case: @XXX */
1537 if (arg->value[0] == '@' && arg->ref)
1540 /* Dereferencing arguments */
1542 depth = __synthesize_probe_trace_arg_ref(ref, &buf,
1548 /* Print argument value */
1549 if (arg->value[0] == '@' && arg->ref)
1550 ret = e_snprintf(buf, buflen, "%s%+ld", arg->value,
1553 ret = e_snprintf(buf, buflen, "%s", arg->value);
1561 ret = e_snprintf(buf, buflen, ")");
1567 /* Print argument type */
1569 ret = e_snprintf(buf, buflen, ":%s", arg->type);
1578 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
1580 struct probe_trace_point *tp = &tev->point;
1584 buf = zalloc(MAX_CMDLEN);
1588 len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
1589 tev->group, tev->event);
1593 /* Uprobes must have tp->address and tp->module */
1594 if (tev->uprobes && (!tp->address || !tp->module))
1597 /* Use the tp->address for uprobes */
1599 ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s:0x%lx",
1600 tp->module, tp->address);
1602 ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s%s%s+%lu",
1603 tp->module ?: "", tp->module ? ":" : "",
1604 tp->symbol, tp->offset);
1610 for (i = 0; i < tev->nargs; i++) {
1611 ret = synthesize_probe_trace_arg(&tev->args[i], buf + len,
1624 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
1625 struct perf_probe_point *pp,
1628 struct symbol *sym = NULL;
1634 map = dso__new_map(tp->module);
1638 sym = map__find_symbol(map, addr, NULL);
1640 addr = kernel_get_symbol_address_by_name(tp->symbol, true);
1643 sym = __find_kernel_function(addr, &map);
1649 pp->retprobe = tp->retprobe;
1650 pp->offset = addr - map->unmap_ip(map, sym->start);
1651 pp->function = strdup(sym->name);
1652 ret = pp->function ? 0 : -ENOMEM;
1655 if (map && !is_kprobe) {
1656 dso__delete(map->dso);
1663 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
1664 struct perf_probe_point *pp,
1670 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
1673 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
1677 pr_debug("Failed to find probe point from both of dwarf and map.\n");
1680 pp->function = strdup(tp->symbol);
1681 pp->offset = tp->offset;
1682 } else if (!tp->module && !is_kprobe) {
1683 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
1686 pp->function = strdup(buf);
1689 if (pp->function == NULL)
1692 pp->retprobe = tp->retprobe;
1697 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
1698 struct perf_probe_event *pev, bool is_kprobe)
1703 /* Convert event/group name */
1704 pev->event = strdup(tev->event);
1705 pev->group = strdup(tev->group);
1706 if (pev->event == NULL || pev->group == NULL)
1709 /* Convert trace_point to probe_point */
1710 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
1714 /* Convert trace_arg to probe_arg */
1715 pev->nargs = tev->nargs;
1716 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1717 if (pev->args == NULL)
1719 for (i = 0; i < tev->nargs && ret >= 0; i++) {
1720 if (tev->args[i].name)
1721 pev->args[i].name = strdup(tev->args[i].name);
1723 ret = synthesize_probe_trace_arg(&tev->args[i],
1725 pev->args[i].name = strdup(buf);
1727 if (pev->args[i].name == NULL && ret >= 0)
1732 clear_perf_probe_event(pev);
1737 void clear_perf_probe_event(struct perf_probe_event *pev)
1739 struct perf_probe_point *pp = &pev->point;
1740 struct perf_probe_arg_field *field, *next;
1747 free(pp->lazy_line);
1749 for (i = 0; i < pev->nargs; i++) {
1750 free(pev->args[i].name);
1751 free(pev->args[i].var);
1752 free(pev->args[i].type);
1753 field = pev->args[i].field;
1756 zfree(&field->name);
1762 memset(pev, 0, sizeof(*pev));
1765 static void clear_probe_trace_event(struct probe_trace_event *tev)
1767 struct probe_trace_arg_ref *ref, *next;
1772 free(tev->point.symbol);
1773 free(tev->point.module);
1774 for (i = 0; i < tev->nargs; i++) {
1775 free(tev->args[i].name);
1776 free(tev->args[i].value);
1777 free(tev->args[i].type);
1778 ref = tev->args[i].ref;
1786 memset(tev, 0, sizeof(*tev));
1789 static void print_open_warning(int err, bool is_kprobe)
1791 char sbuf[STRERR_BUFSIZE];
1793 if (err == -ENOENT) {
1797 config = "CONFIG_UPROBE_EVENTS";
1799 config = "CONFIG_KPROBE_EVENTS";
1801 pr_warning("%cprobe_events file does not exist"
1802 " - please rebuild kernel with %s.\n",
1803 is_kprobe ? 'k' : 'u', config);
1804 } else if (err == -ENOTSUP)
1805 pr_warning("Debugfs is not mounted.\n");
1807 pr_warning("Failed to open %cprobe_events: %s\n",
1808 is_kprobe ? 'k' : 'u',
1809 strerror_r(-err, sbuf, sizeof(sbuf)));
1812 static void print_both_open_warning(int kerr, int uerr)
1814 /* Both kprobes and uprobes are disabled, warn it. */
1815 if (kerr == -ENOTSUP && uerr == -ENOTSUP)
1816 pr_warning("Debugfs is not mounted.\n");
1817 else if (kerr == -ENOENT && uerr == -ENOENT)
1818 pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS "
1819 "or/and CONFIG_UPROBE_EVENTS.\n");
1821 char sbuf[STRERR_BUFSIZE];
1822 pr_warning("Failed to open kprobe events: %s.\n",
1823 strerror_r(-kerr, sbuf, sizeof(sbuf)));
1824 pr_warning("Failed to open uprobe events: %s.\n",
1825 strerror_r(-uerr, sbuf, sizeof(sbuf)));
1829 static int open_probe_events(const char *trace_file, bool readwrite)
1832 const char *__debugfs;
1835 __debugfs = debugfs_find_mountpoint();
1836 if (__debugfs == NULL)
1839 ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file);
1841 pr_debug("Opening %s write=%d\n", buf, readwrite);
1842 if (readwrite && !probe_event_dry_run)
1843 ret = open(buf, O_RDWR, O_APPEND);
1845 ret = open(buf, O_RDONLY, 0);
1853 static int open_kprobe_events(bool readwrite)
1855 return open_probe_events("tracing/kprobe_events", readwrite);
1858 static int open_uprobe_events(bool readwrite)
1860 return open_probe_events("tracing/uprobe_events", readwrite);
1863 /* Get raw string list of current kprobe_events or uprobe_events */
1864 static struct strlist *get_probe_trace_command_rawlist(int fd)
1868 char buf[MAX_CMDLEN];
1872 sl = strlist__new(true, NULL);
1874 fp = fdopen(dup(fd), "r");
1876 p = fgets(buf, MAX_CMDLEN, fp);
1880 idx = strlen(p) - 1;
1883 ret = strlist__add(sl, buf);
1885 pr_debug("strlist__add failed (%d)\n", ret);
1886 strlist__delete(sl);
1896 static int show_perf_probe_event(struct perf_probe_event *pev,
1903 /* Synthesize only event probe point */
1904 place = synthesize_perf_probe_point(&pev->point);
1908 ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event);
1912 printf(" %-20s (on %s", buf, place);
1914 printf(" in %s", module);
1916 if (pev->nargs > 0) {
1918 for (i = 0; i < pev->nargs; i++) {
1919 ret = synthesize_perf_probe_arg(&pev->args[i],
1931 static int __show_perf_probe_events(int fd, bool is_kprobe)
1934 struct probe_trace_event tev;
1935 struct perf_probe_event pev;
1936 struct strlist *rawlist;
1937 struct str_node *ent;
1939 memset(&tev, 0, sizeof(tev));
1940 memset(&pev, 0, sizeof(pev));
1942 rawlist = get_probe_trace_command_rawlist(fd);
1946 strlist__for_each(ent, rawlist) {
1947 ret = parse_probe_trace_command(ent->s, &tev);
1949 ret = convert_to_perf_probe_event(&tev, &pev,
1952 ret = show_perf_probe_event(&pev,
1955 clear_perf_probe_event(&pev);
1956 clear_probe_trace_event(&tev);
1960 strlist__delete(rawlist);
1965 /* List up current perf-probe events */
1966 int show_perf_probe_events(void)
1968 int kp_fd, up_fd, ret;
1972 ret = init_symbol_maps(false);
1976 kp_fd = open_kprobe_events(false);
1978 ret = __show_perf_probe_events(kp_fd, true);
1984 up_fd = open_uprobe_events(false);
1985 if (kp_fd < 0 && up_fd < 0) {
1986 print_both_open_warning(kp_fd, up_fd);
1992 ret = __show_perf_probe_events(up_fd, false);
2000 /* Get current perf-probe event names */
2001 static struct strlist *get_probe_trace_event_names(int fd, bool include_group)
2004 struct strlist *sl, *rawlist;
2005 struct str_node *ent;
2006 struct probe_trace_event tev;
2009 memset(&tev, 0, sizeof(tev));
2010 rawlist = get_probe_trace_command_rawlist(fd);
2013 sl = strlist__new(true, NULL);
2014 strlist__for_each(ent, rawlist) {
2015 ret = parse_probe_trace_command(ent->s, &tev);
2018 if (include_group) {
2019 ret = e_snprintf(buf, 128, "%s:%s", tev.group,
2022 ret = strlist__add(sl, buf);
2024 ret = strlist__add(sl, tev.event);
2025 clear_probe_trace_event(&tev);
2029 strlist__delete(rawlist);
2032 strlist__delete(sl);
2038 static int write_probe_trace_event(int fd, struct probe_trace_event *tev)
2041 char *buf = synthesize_probe_trace_command(tev);
2042 char sbuf[STRERR_BUFSIZE];
2045 pr_debug("Failed to synthesize probe trace event.\n");
2049 pr_debug("Writing event: %s\n", buf);
2050 if (!probe_event_dry_run) {
2051 ret = write(fd, buf, strlen(buf));
2053 pr_warning("Failed to write event: %s\n",
2054 strerror_r(errno, sbuf, sizeof(sbuf)));
2060 static int get_new_event_name(char *buf, size_t len, const char *base,
2061 struct strlist *namelist, bool allow_suffix)
2066 ret = e_snprintf(buf, len, "%s", base);
2068 pr_debug("snprintf() failed: %d\n", ret);
2071 if (!strlist__has_entry(namelist, buf))
2074 if (!allow_suffix) {
2075 pr_warning("Error: event \"%s\" already exists. "
2076 "(Use -f to force duplicates.)\n", base);
2080 /* Try to add suffix */
2081 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2082 ret = e_snprintf(buf, len, "%s_%d", base, i);
2084 pr_debug("snprintf() failed: %d\n", ret);
2087 if (!strlist__has_entry(namelist, buf))
2090 if (i == MAX_EVENT_INDEX) {
2091 pr_warning("Too many events are on the same function.\n");
2098 static int __add_probe_trace_events(struct perf_probe_event *pev,
2099 struct probe_trace_event *tevs,
2100 int ntevs, bool allow_suffix)
2103 struct probe_trace_event *tev = NULL;
2105 const char *event, *group;
2106 struct strlist *namelist;
2109 fd = open_uprobe_events(true);
2111 fd = open_kprobe_events(true);
2114 print_open_warning(fd, !pev->uprobes);
2118 /* Get current event names */
2119 namelist = get_probe_trace_event_names(fd, false);
2121 pr_debug("Failed to get current event list.\n");
2126 printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":");
2127 for (i = 0; i < ntevs; i++) {
2132 if (pev->point.function)
2133 event = pev->point.function;
2135 event = tev->point.symbol;
2139 group = PERFPROBE_GROUP;
2141 /* Get an unused new event name */
2142 ret = get_new_event_name(buf, 64, event,
2143 namelist, allow_suffix);
2148 tev->event = strdup(event);
2149 tev->group = strdup(group);
2150 if (tev->event == NULL || tev->group == NULL) {
2154 ret = write_probe_trace_event(fd, tev);
2157 /* Add added event name to namelist */
2158 strlist__add(namelist, event);
2160 /* Trick here - save current event/group */
2163 pev->event = tev->event;
2164 pev->group = tev->group;
2165 show_perf_probe_event(pev, tev->point.module);
2166 /* Trick here - restore current event/group */
2167 pev->event = (char *)event;
2168 pev->group = (char *)group;
2171 * Probes after the first probe which comes from same
2172 * user input are always allowed to add suffix, because
2173 * there might be several addresses corresponding to
2176 allow_suffix = true;
2180 /* Show how to use the event. */
2181 printf("\nYou can now use it in all perf tools, such as:\n\n");
2182 printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group,
2186 strlist__delete(namelist);
2191 static char *looking_function_name;
2192 static int num_matched_functions;
2194 static int probe_function_filter(struct map *map __maybe_unused,
2197 if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) &&
2198 strcmp(looking_function_name, sym->name) == 0) {
2199 num_matched_functions++;
2205 #define strdup_or_goto(str, label) \
2206 ({ char *__p = strdup(str); if (!__p) goto label; __p; })
2209 * Find probe function addresses from map.
2210 * Return an error or the number of found probe_trace_event
2212 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2213 struct probe_trace_event **tevs,
2214 int max_tevs, const char *target)
2216 struct map *map = NULL;
2217 struct kmap *kmap = NULL;
2218 struct ref_reloc_sym *reloc_sym = NULL;
2221 struct probe_trace_event *tev;
2222 struct perf_probe_point *pp = &pev->point;
2223 struct probe_trace_point *tp;
2226 /* Init maps of given executable or kernel */
2228 map = dso__new_map(target);
2230 map = kernel_get_module_map(target);
2237 * Load matched symbols: Since the different local symbols may have
2238 * same name but different addresses, this lists all the symbols.
2240 num_matched_functions = 0;
2241 looking_function_name = pp->function;
2242 ret = map__load(map, probe_function_filter);
2243 if (ret || num_matched_functions == 0) {
2244 pr_err("Failed to find symbol %s in %s\n", pp->function,
2245 target ? : "kernel");
2248 } else if (num_matched_functions > max_tevs) {
2249 pr_err("Too many functions matched in %s\n",
2250 target ? : "kernel");
2255 if (!pev->uprobes) {
2256 kmap = map__kmap(map);
2257 reloc_sym = kmap->ref_reloc_sym;
2259 pr_warning("Relocated base symbol is not found!\n");
2265 /* Setup result trace-probe-events */
2266 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2273 map__for_each_symbol(map, sym, nd) {
2274 tev = (*tevs) + ret;
2276 if (ret == num_matched_functions) {
2277 pr_warning("Too many symbols are listed. Skip it.\n");
2282 if (pp->offset > sym->end - sym->start) {
2283 pr_warning("Offset %ld is bigger than the size of %s\n",
2284 pp->offset, sym->name);
2288 /* Add one probe point */
2289 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2291 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2292 tp->offset = tp->address - reloc_sym->addr;
2294 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2295 tp->offset = pp->offset;
2297 tp->retprobe = pp->retprobe;
2299 tev->point.module = strdup_or_goto(target, nomem_out);
2300 tev->uprobes = pev->uprobes;
2301 tev->nargs = pev->nargs;
2303 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2305 if (tev->args == NULL)
2308 for (i = 0; i < tev->nargs; i++) {
2309 if (pev->args[i].name)
2311 strdup_or_goto(pev->args[i].name,
2314 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2316 if (pev->args[i].type)
2318 strdup_or_goto(pev->args[i].type,
2324 if (map && pev->uprobes) {
2325 /* Only when using uprobe(exec) map needs to be released */
2326 dso__delete(map->dso);
2334 clear_probe_trace_events(*tevs, num_matched_functions);
2339 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
2340 struct probe_trace_event **tevs,
2341 int max_tevs, const char *target)
2345 if (pev->uprobes && !pev->group) {
2346 /* Replace group name if not given */
2347 ret = convert_exec_to_group(target, &pev->group);
2349 pr_warning("Failed to make a group name.\n");
2354 /* Convert perf_probe_event with debuginfo */
2355 ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target);
2357 return ret; /* Found in debuginfo or got an error */
2359 return find_probe_trace_events_from_map(pev, tevs, max_tevs, target);
2362 struct __event_package {
2363 struct perf_probe_event *pev;
2364 struct probe_trace_event *tevs;
2368 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
2369 int max_tevs, const char *target, bool force_add)
2372 struct __event_package *pkgs;
2375 pkgs = zalloc(sizeof(struct __event_package) * npevs);
2380 ret = init_symbol_maps(pevs->uprobes);
2386 /* Loop 1: convert all events */
2387 for (i = 0; i < npevs; i++) {
2388 pkgs[i].pev = &pevs[i];
2389 /* Convert with or without debuginfo */
2390 ret = convert_to_probe_trace_events(pkgs[i].pev,
2396 pkgs[i].ntevs = ret;
2399 /* Loop 2: add all events */
2400 for (i = 0; i < npevs; i++) {
2401 ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs,
2402 pkgs[i].ntevs, force_add);
2407 /* Loop 3: cleanup and free trace events */
2408 for (i = 0; i < npevs; i++) {
2409 for (j = 0; j < pkgs[i].ntevs; j++)
2410 clear_probe_trace_event(&pkgs[i].tevs[j]);
2411 zfree(&pkgs[i].tevs);
2419 static int __del_trace_probe_event(int fd, struct str_node *ent)
2425 /* Convert from perf-probe event to trace-probe event */
2426 ret = e_snprintf(buf, 128, "-:%s", ent->s);
2430 p = strchr(buf + 2, ':');
2432 pr_debug("Internal error: %s should have ':' but not.\n",
2439 pr_debug("Writing event: %s\n", buf);
2440 ret = write(fd, buf, strlen(buf));
2446 printf("Removed event: %s\n", ent->s);
2449 pr_warning("Failed to delete event: %s\n",
2450 strerror_r(-ret, buf, sizeof(buf)));
2454 static int del_trace_probe_event(int fd, const char *buf,
2455 struct strlist *namelist)
2457 struct str_node *ent, *n;
2460 if (strpbrk(buf, "*?")) { /* Glob-exp */
2461 strlist__for_each_safe(ent, n, namelist)
2462 if (strglobmatch(ent->s, buf)) {
2463 ret = __del_trace_probe_event(fd, ent);
2466 strlist__remove(namelist, ent);
2469 ent = strlist__find(namelist, buf);
2471 ret = __del_trace_probe_event(fd, ent);
2473 strlist__remove(namelist, ent);
2480 int del_perf_probe_events(struct strlist *dellist)
2482 int ret = -1, ufd = -1, kfd = -1;
2484 const char *group, *event;
2486 struct str_node *ent;
2487 struct strlist *namelist = NULL, *unamelist = NULL;
2489 /* Get current event names */
2490 kfd = open_kprobe_events(true);
2492 namelist = get_probe_trace_event_names(kfd, true);
2494 ufd = open_uprobe_events(true);
2496 unamelist = get_probe_trace_event_names(ufd, true);
2498 if (kfd < 0 && ufd < 0) {
2499 print_both_open_warning(kfd, ufd);
2503 if (namelist == NULL && unamelist == NULL)
2506 strlist__for_each(ent, dellist) {
2507 str = strdup(ent->s);
2512 pr_debug("Parsing: %s\n", str);
2513 p = strchr(str, ':');
2523 ret = e_snprintf(buf, 128, "%s:%s", group, event);
2525 pr_err("Failed to copy event.");
2530 pr_debug("Group: %s, Event: %s\n", group, event);
2533 ret = del_trace_probe_event(kfd, buf, namelist);
2535 if (unamelist && ret != 0)
2536 ret = del_trace_probe_event(ufd, buf, unamelist);
2539 pr_info("Info: Event \"%s\" does not exist.\n", buf);
2546 strlist__delete(namelist);
2551 strlist__delete(unamelist);
2558 /* TODO: don't use a global variable for filter ... */
2559 static struct strfilter *available_func_filter;
2562 * If a symbol corresponds to a function with global binding and
2563 * matches filter return 0. For all others return 1.
2565 static int filter_available_functions(struct map *map __maybe_unused,
2568 if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) &&
2569 strfilter__compare(available_func_filter, sym->name))
2574 int show_available_funcs(const char *target, struct strfilter *_filter,
2580 ret = init_symbol_maps(user);
2584 /* Get a symbol map */
2586 map = dso__new_map(target);
2588 map = kernel_get_module_map(target);
2590 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
2594 /* Load symbols with given filter */
2595 available_func_filter = _filter;
2596 if (map__load(map, filter_available_functions)) {
2597 pr_err("Failed to load symbols in %s\n", (target) ? : "kernel");
2600 if (!dso__sorted_by_name(map->dso, map->type))
2601 dso__sort_by_name(map->dso, map->type);
2603 /* Show all (filtered) symbols */
2605 dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
2608 dso__delete(map->dso);