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;
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)
263 const char *path = module;
265 if (!module || !strchr(module, '/')) {
266 path = kernel_get_module_path(module);
268 pr_err("Failed to find path of %s module.\n",
273 return debuginfo__new(path);
276 static int get_text_start_address(const char *exec, unsigned long *address)
281 int fd, ret = -ENOENT;
283 fd = open(exec, O_RDONLY);
287 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
291 if (gelf_getehdr(elf, &ehdr) == NULL)
294 if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL))
297 *address = shdr.sh_addr - shdr.sh_offset;
305 * Convert trace point to probe point with debuginfo
307 static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
308 struct perf_probe_point *pp,
311 struct debuginfo *dinfo = NULL;
312 unsigned long stext = 0;
313 u64 addr = tp->address;
316 /* convert the address to dwarf address */
322 ret = get_text_start_address(tp->module, &stext);
327 addr = kernel_get_symbol_address_by_name(tp->symbol, false);
333 pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
334 tp->module ? : "kernel");
336 dinfo = open_debuginfo(tp->module);
338 ret = debuginfo__find_probe_point(dinfo,
339 (unsigned long)addr, pp);
340 debuginfo__delete(dinfo);
342 pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", addr);
347 pp->retprobe = tp->retprobe;
351 pr_debug("Failed to find corresponding probes from debuginfo.\n");
352 return ret ? : -ENOENT;
355 static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
356 int ntevs, const char *exec)
359 unsigned long stext = 0;
364 ret = get_text_start_address(exec, &stext);
368 for (i = 0; i < ntevs && ret >= 0; i++) {
369 /* point.address is the addres of point.symbol + point.offset */
370 tevs[i].point.address -= stext;
371 tevs[i].point.module = strdup(exec);
372 if (!tevs[i].point.module) {
376 tevs[i].uprobes = true;
382 static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
383 int ntevs, const char *module)
391 tmp = strrchr(module, '/');
393 /* This is a module path -- get the module name */
394 module = strdup(tmp + 1);
397 tmp = strchr(module, '.');
400 tmp = (char *)module; /* For free() */
403 for (i = 0; i < ntevs; i++) {
404 tevs[i].point.module = strdup(module);
405 if (!tevs[i].point.module) {
415 /* Post processing the probe events */
416 static int post_process_probe_trace_events(struct probe_trace_event *tevs,
417 int ntevs, const char *module,
420 struct ref_reloc_sym *reloc_sym;
425 return add_exec_to_probe_trace_events(tevs, ntevs, module);
427 /* Note that currently ref_reloc_sym based probe is not for drivers */
429 return add_module_to_probe_trace_events(tevs, ntevs, module);
431 reloc_sym = kernel_get_ref_reloc_sym();
433 pr_warning("Relocated base symbol is not found!\n");
437 for (i = 0; i < ntevs; i++) {
438 if (tevs[i].point.address) {
439 tmp = strdup(reloc_sym->name);
442 free(tevs[i].point.symbol);
443 tevs[i].point.symbol = tmp;
444 tevs[i].point.offset = tevs[i].point.address -
445 reloc_sym->unrelocated_addr;
451 /* Try to find perf_probe_event with debuginfo */
452 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
453 struct probe_trace_event **tevs,
454 int max_tevs, const char *target)
456 bool need_dwarf = perf_probe_event_need_dwarf(pev);
457 struct debuginfo *dinfo;
460 dinfo = open_debuginfo(target);
464 pr_warning("Failed to open debuginfo file.\n");
467 pr_debug("Could not open debuginfo. Try to use symbols.\n");
471 pr_debug("Try to find probe point from debuginfo.\n");
472 /* Searching trace events corresponding to a probe event */
473 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs);
475 debuginfo__delete(dinfo);
477 if (ntevs > 0) { /* Succeeded to find trace events */
478 pr_debug("Found %d probe_trace_events.\n", ntevs);
479 ret = post_process_probe_trace_events(*tevs, ntevs,
480 target, pev->uprobes);
482 clear_probe_trace_events(*tevs, ntevs);
485 return ret < 0 ? ret : ntevs;
488 if (ntevs == 0) { /* No error but failed to find probe point. */
489 pr_warning("Probe point '%s' not found.\n",
490 synthesize_perf_probe_point(&pev->point));
493 /* Error path : ntevs < 0 */
494 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
495 if (ntevs == -EBADF) {
496 pr_warning("Warning: No dwarf info found in the vmlinux - "
497 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
499 pr_debug("Trying to use symbols.\n");
507 * Find a src file from a DWARF tag path. Prepend optional source path prefix
508 * and chop off leading directories that do not exist. Result is passed back as
509 * a newly allocated path on success.
510 * Return 0 if file was found and readable, -errno otherwise.
512 static int get_real_path(const char *raw_path, const char *comp_dir,
515 const char *prefix = symbol_conf.source_prefix;
518 if (raw_path[0] != '/' && comp_dir)
519 /* If not an absolute path, try to use comp_dir */
522 if (access(raw_path, R_OK) == 0) {
523 *new_path = strdup(raw_path);
530 *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2));
535 sprintf(*new_path, "%s/%s", prefix, raw_path);
537 if (access(*new_path, R_OK) == 0)
540 if (!symbol_conf.source_prefix)
541 /* In case of searching comp_dir, don't retry */
549 raw_path = strchr(++raw_path, '/');
563 #define LINEBUF_SIZE 256
564 #define NR_ADDITIONAL_LINES 2
566 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
568 char buf[LINEBUF_SIZE];
569 const char *color = show_num ? "" : PERF_COLOR_BLUE;
570 const char *prefix = NULL;
573 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
578 prefix = show_num ? "%7d " : " ";
579 color_fprintf(stdout, color, prefix, l);
581 color_fprintf(stdout, color, "%s", buf);
583 } while (strchr(buf, '\n') == NULL);
588 pr_warning("File read error: %s\n", strerror(errno));
594 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
596 int rv = __show_one_line(fp, l, skip, show_num);
598 pr_warning("Source file is shorter than expected.\n");
604 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
605 #define show_one_line(f,l) _show_one_line(f,l,false,false)
606 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
607 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
610 * Show line-range always requires debuginfo to find source file and
613 static int __show_line_range(struct line_range *lr, const char *module)
617 struct debuginfo *dinfo;
622 /* Search a line range */
623 dinfo = open_debuginfo(module);
625 pr_warning("Failed to open debuginfo file.\n");
629 ret = debuginfo__find_line_range(dinfo, lr);
630 debuginfo__delete(dinfo);
631 if (ret == 0 || ret == -ENOENT) {
632 pr_warning("Specified source line is not found.\n");
634 } else if (ret < 0) {
635 pr_warning("Debuginfo analysis failed.\n");
639 /* Convert source file path */
641 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
642 free(tmp); /* Free old path */
644 pr_warning("Failed to find source file path.\n");
651 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
652 lr->start - lr->offset);
654 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
656 fp = fopen(lr->path, "r");
658 pr_warning("Failed to open %s: %s\n", lr->path,
662 /* Skip to starting line number */
663 while (l < lr->start) {
664 ret = skip_one_line(fp, l++);
669 intlist__for_each(ln, lr->line_list) {
670 for (; ln->i > l; l++) {
671 ret = show_one_line(fp, l - lr->offset);
675 ret = show_one_line_with_num(fp, l++ - lr->offset);
680 if (lr->end == INT_MAX)
681 lr->end = l + NR_ADDITIONAL_LINES;
682 while (l <= lr->end) {
683 ret = show_one_line_or_eof(fp, l++ - lr->offset);
692 int show_line_range(struct line_range *lr, const char *module)
696 ret = init_symbol_maps(false);
699 ret = __show_line_range(lr, module);
705 static int show_available_vars_at(struct debuginfo *dinfo,
706 struct perf_probe_event *pev,
707 int max_vls, struct strfilter *_filter,
712 struct str_node *node;
713 struct variable_list *vls = NULL, *vl;
716 buf = synthesize_perf_probe_point(&pev->point);
719 pr_debug("Searching variables at %s\n", buf);
721 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls,
724 if (ret == 0 || ret == -ENOENT) {
725 pr_err("Failed to find the address of %s\n", buf);
728 pr_warning("Debuginfo analysis failed.\n");
732 /* Some variables are found */
733 fprintf(stdout, "Available variables at %s\n", buf);
734 for (i = 0; i < ret; i++) {
737 * A probe point might be converted to
738 * several trace points.
740 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
742 zfree(&vl->point.symbol);
745 strlist__for_each(node, vl->vars) {
746 var = strchr(node->s, '\t') + 1;
747 if (strfilter__compare(_filter, var)) {
748 fprintf(stdout, "\t\t%s\n", node->s);
752 strlist__delete(vl->vars);
755 fprintf(stdout, "\t\t(No matched variables)\n");
763 /* Show available variables on given probe point */
764 int show_available_vars(struct perf_probe_event *pevs, int npevs,
765 int max_vls, const char *module,
766 struct strfilter *_filter, bool externs)
769 struct debuginfo *dinfo;
771 ret = init_symbol_maps(false);
775 dinfo = open_debuginfo(module);
777 pr_warning("Failed to open debuginfo file.\n");
784 for (i = 0; i < npevs && ret >= 0; i++)
785 ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter,
788 debuginfo__delete(dinfo);
794 #else /* !HAVE_DWARF_SUPPORT */
797 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
798 struct perf_probe_point *pp __maybe_unused,
799 bool is_kprobe __maybe_unused)
804 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
805 struct probe_trace_event **tevs __maybe_unused,
806 int max_tevs __maybe_unused,
807 const char *target __maybe_unused)
809 if (perf_probe_event_need_dwarf(pev)) {
810 pr_warning("Debuginfo-analysis is not supported.\n");
817 int show_line_range(struct line_range *lr __maybe_unused,
818 const char *module __maybe_unused)
820 pr_warning("Debuginfo-analysis is not supported.\n");
824 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
825 int npevs __maybe_unused, int max_vls __maybe_unused,
826 const char *module __maybe_unused,
827 struct strfilter *filter __maybe_unused,
828 bool externs __maybe_unused)
830 pr_warning("Debuginfo-analysis is not supported.\n");
835 void line_range__clear(struct line_range *lr)
841 intlist__delete(lr->line_list);
842 memset(lr, 0, sizeof(*lr));
845 int line_range__init(struct line_range *lr)
847 memset(lr, 0, sizeof(*lr));
848 lr->line_list = intlist__new(NULL);
855 static int parse_line_num(char **ptr, int *val, const char *what)
857 const char *start = *ptr;
860 *val = strtol(*ptr, ptr, 0);
861 if (errno || *ptr == start) {
862 semantic_error("'%s' is not a valid number.\n", what);
869 * Stuff 'lr' according to the line range described by 'arg'.
870 * The line range syntax is described by:
872 * SRC[:SLN[+NUM|-ELN]]
873 * FNC[@SRC][:SLN[+NUM|-ELN]]
875 int parse_line_range_desc(const char *arg, struct line_range *lr)
877 char *range, *file, *name = strdup(arg);
886 range = strchr(name, ':');
890 err = parse_line_num(&range, &lr->start, "start line");
894 if (*range == '+' || *range == '-') {
895 const char c = *range++;
897 err = parse_line_num(&range, &lr->end, "end line");
902 lr->end += lr->start;
904 * Adjust the number of lines here.
905 * If the number of lines == 1, the
906 * the end of line should be equal to
913 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
916 if (lr->start > lr->end) {
917 semantic_error("Start line must be smaller"
918 " than end line.\n");
921 if (*range != '\0') {
922 semantic_error("Tailing with invalid str '%s'.\n", range);
927 file = strchr(name, '@');
930 lr->file = strdup(++file);
931 if (lr->file == NULL) {
936 } else if (strchr(name, '.'))
947 /* Check the name is good for event/group */
948 static bool check_event_name(const char *name)
950 if (!isalpha(*name) && *name != '_')
952 while (*++name != '\0') {
953 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
959 /* Parse probepoint definition. */
960 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
962 struct perf_probe_point *pp = &pev->point;
967 * perf probe [EVENT=]SRC[:LN|;PTN]
968 * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
970 * TODO:Group name support
973 ptr = strpbrk(arg, ";=@+%");
974 if (ptr && *ptr == '=') { /* Event name */
977 if (strchr(arg, ':')) {
978 semantic_error("Group name is not supported yet.\n");
981 if (!check_event_name(arg)) {
982 semantic_error("%s is bad for event name -it must "
983 "follow C symbol-naming rule.\n", arg);
986 pev->event = strdup(arg);
987 if (pev->event == NULL)
993 ptr = strpbrk(arg, ";:+@%");
1003 /* Check arg is function or file and copy it */
1004 if (strchr(tmp, '.')) /* File */
1009 /* Parse other options */
1013 if (c == ';') { /* Lazy pattern must be the last part */
1014 pp->lazy_line = strdup(arg);
1015 if (pp->lazy_line == NULL)
1019 ptr = strpbrk(arg, ";:+@%");
1025 case ':': /* Line number */
1026 pp->line = strtoul(arg, &tmp, 0);
1028 semantic_error("There is non-digit char"
1029 " in line number.\n");
1033 case '+': /* Byte offset from a symbol */
1034 pp->offset = strtoul(arg, &tmp, 0);
1036 semantic_error("There is non-digit character"
1041 case '@': /* File name */
1043 semantic_error("SRC@SRC is not allowed.\n");
1046 pp->file = strdup(arg);
1047 if (pp->file == NULL)
1050 case '%': /* Probe places */
1051 if (strcmp(arg, "return") == 0) {
1053 } else { /* Others not supported yet */
1054 semantic_error("%%%s is not supported.\n", arg);
1058 default: /* Buggy case */
1059 pr_err("This program has a bug at %s:%d.\n",
1060 __FILE__, __LINE__);
1066 /* Exclusion check */
1067 if (pp->lazy_line && pp->line) {
1068 semantic_error("Lazy pattern can't be used with"
1073 if (pp->lazy_line && pp->offset) {
1074 semantic_error("Lazy pattern can't be used with offset.\n");
1078 if (pp->line && pp->offset) {
1079 semantic_error("Offset can't be used with line number.\n");
1083 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1084 semantic_error("File always requires line number or "
1089 if (pp->offset && !pp->function) {
1090 semantic_error("Offset requires an entry function.\n");
1094 if (pp->retprobe && !pp->function) {
1095 semantic_error("Return probe requires an entry function.\n");
1099 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1100 semantic_error("Offset/Line/Lazy pattern can't be used with "
1105 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1106 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1111 /* Parse perf-probe event argument */
1112 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1114 char *tmp, *goodname;
1115 struct perf_probe_arg_field **fieldp;
1117 pr_debug("parsing arg: %s into ", str);
1119 tmp = strchr(str, '=');
1121 arg->name = strndup(str, tmp - str);
1122 if (arg->name == NULL)
1124 pr_debug("name:%s ", arg->name);
1128 tmp = strchr(str, ':');
1129 if (tmp) { /* Type setting */
1131 arg->type = strdup(tmp + 1);
1132 if (arg->type == NULL)
1134 pr_debug("type:%s ", arg->type);
1137 tmp = strpbrk(str, "-.[");
1138 if (!is_c_varname(str) || !tmp) {
1139 /* A variable, register, symbol or special value */
1140 arg->var = strdup(str);
1141 if (arg->var == NULL)
1143 pr_debug("%s\n", arg->var);
1147 /* Structure fields or array element */
1148 arg->var = strndup(str, tmp - str);
1149 if (arg->var == NULL)
1151 goodname = arg->var;
1152 pr_debug("%s, ", arg->var);
1153 fieldp = &arg->field;
1156 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1157 if (*fieldp == NULL)
1159 if (*tmp == '[') { /* Array */
1161 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1162 (*fieldp)->ref = true;
1163 if (*tmp != ']' || tmp == str + 1) {
1164 semantic_error("Array index must be a"
1171 } else { /* Structure */
1174 (*fieldp)->ref = false;
1175 } else if (tmp[1] == '>') {
1177 (*fieldp)->ref = true;
1179 semantic_error("Argument parse error: %s\n",
1183 tmp = strpbrk(str, "-.[");
1186 (*fieldp)->name = strndup(str, tmp - str);
1187 if ((*fieldp)->name == NULL)
1190 goodname = (*fieldp)->name;
1191 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1192 fieldp = &(*fieldp)->next;
1195 (*fieldp)->name = strdup(str);
1196 if ((*fieldp)->name == NULL)
1199 goodname = (*fieldp)->name;
1200 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1202 /* If no name is specified, set the last field name (not array index)*/
1204 arg->name = strdup(goodname);
1205 if (arg->name == NULL)
1211 /* Parse perf-probe event command */
1212 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1215 int argc, i, ret = 0;
1217 argv = argv_split(cmd, &argc);
1219 pr_debug("Failed to split arguments.\n");
1222 if (argc - 1 > MAX_PROBE_ARGS) {
1223 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1227 /* Parse probe point */
1228 ret = parse_perf_probe_point(argv[0], pev);
1232 /* Copy arguments and ensure return probe has no C argument */
1233 pev->nargs = argc - 1;
1234 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1235 if (pev->args == NULL) {
1239 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1240 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1242 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1243 semantic_error("You can't specify local variable for"
1254 /* Return true if this perf_probe_event requires debuginfo */
1255 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1259 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1262 for (i = 0; i < pev->nargs; i++)
1263 if (is_c_varname(pev->args[i].var))
1269 /* Parse probe_events event into struct probe_point */
1270 static int parse_probe_trace_command(const char *cmd,
1271 struct probe_trace_event *tev)
1273 struct probe_trace_point *tp = &tev->point;
1276 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1280 pr_debug("Parsing probe_events: %s\n", cmd);
1281 argv = argv_split(cmd, &argc);
1283 pr_debug("Failed to split arguments.\n");
1287 semantic_error("Too few probe arguments.\n");
1292 /* Scan event and group name. */
1293 argv0_str = strdup(argv[0]);
1294 if (argv0_str == NULL) {
1298 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1299 fmt2_str = strtok_r(NULL, "/", &fmt);
1300 fmt3_str = strtok_r(NULL, " \t", &fmt);
1301 if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
1302 || fmt3_str == NULL) {
1303 semantic_error("Failed to parse event name: %s\n", argv[0]);
1308 tev->group = strdup(fmt2_str);
1309 tev->event = strdup(fmt3_str);
1310 if (tev->group == NULL || tev->event == NULL) {
1314 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1316 tp->retprobe = (pr == 'r');
1318 /* Scan module name(if there), function name and offset */
1319 p = strchr(argv[1], ':');
1321 tp->module = strndup(argv[1], p - argv[1]);
1325 fmt1_str = strtok_r(p, "+", &fmt);
1326 if (fmt1_str[0] == '0') /* only the address started with 0x */
1327 tp->address = strtoul(fmt1_str, NULL, 0);
1329 /* Only the symbol-based probe has offset */
1330 tp->symbol = strdup(fmt1_str);
1331 if (tp->symbol == NULL) {
1335 fmt2_str = strtok_r(NULL, "", &fmt);
1336 if (fmt2_str == NULL)
1339 tp->offset = strtoul(fmt2_str, NULL, 10);
1342 tev->nargs = argc - 2;
1343 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1344 if (tev->args == NULL) {
1348 for (i = 0; i < tev->nargs; i++) {
1349 p = strchr(argv[i + 2], '=');
1350 if (p) /* We don't need which register is assigned. */
1354 tev->args[i].name = strdup(argv[i + 2]);
1355 /* TODO: parse regs and offset */
1356 tev->args[i].value = strdup(p);
1357 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1369 /* Compose only probe arg */
1370 int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len)
1372 struct perf_probe_arg_field *field = pa->field;
1376 if (pa->name && pa->var)
1377 ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var);
1379 ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var);
1386 if (field->name[0] == '[')
1387 ret = e_snprintf(tmp, len, "%s", field->name);
1389 ret = e_snprintf(tmp, len, "%s%s",
1390 field->ref ? "->" : ".", field->name);
1395 field = field->next;
1399 ret = e_snprintf(tmp, len, ":%s", pa->type);
1408 pr_debug("Failed to synthesize perf probe argument: %s\n",
1413 /* Compose only probe point (not argument) */
1414 static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1417 char offs[32] = "", line[32] = "", file[32] = "";
1420 buf = zalloc(MAX_CMDLEN);
1426 ret = e_snprintf(offs, 32, "+%lu", pp->offset);
1431 ret = e_snprintf(line, 32, ":%d", pp->line);
1439 tmp = strchr(pp->file + len - 30, '/');
1440 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1442 ret = e_snprintf(file, 32, "@%s", tmp);
1448 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function,
1449 offs, pp->retprobe ? "%return" : "", line,
1452 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line);
1458 pr_debug("Failed to synthesize perf probe point: %s\n",
1465 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1470 buf = synthesize_perf_probe_point(&pev->point);
1475 for (i = 0; i < pev->nargs; i++) {
1476 ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
1489 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1490 char **buf, size_t *buflen,
1495 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1501 ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset);
1513 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1514 char *buf, size_t buflen)
1516 struct probe_trace_arg_ref *ref = arg->ref;
1520 /* Argument name or separator */
1522 ret = e_snprintf(buf, buflen, " %s=", arg->name);
1524 ret = e_snprintf(buf, buflen, " ");
1530 /* Special case: @XXX */
1531 if (arg->value[0] == '@' && arg->ref)
1534 /* Dereferencing arguments */
1536 depth = __synthesize_probe_trace_arg_ref(ref, &buf,
1542 /* Print argument value */
1543 if (arg->value[0] == '@' && arg->ref)
1544 ret = e_snprintf(buf, buflen, "%s%+ld", arg->value,
1547 ret = e_snprintf(buf, buflen, "%s", arg->value);
1555 ret = e_snprintf(buf, buflen, ")");
1561 /* Print argument type */
1563 ret = e_snprintf(buf, buflen, ":%s", arg->type);
1572 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
1574 struct probe_trace_point *tp = &tev->point;
1578 buf = zalloc(MAX_CMDLEN);
1582 len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
1583 tev->group, tev->event);
1587 /* Uprobes must have tp->address and tp->module */
1588 if (tev->uprobes && (!tp->address || !tp->module))
1591 /* Use the tp->address for uprobes */
1593 ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s:0x%lx",
1594 tp->module, tp->address);
1596 ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s%s%s+%lu",
1597 tp->module ?: "", tp->module ? ":" : "",
1598 tp->symbol, tp->offset);
1604 for (i = 0; i < tev->nargs; i++) {
1605 ret = synthesize_probe_trace_arg(&tev->args[i], buf + len,
1618 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
1619 struct perf_probe_point *pp,
1622 struct symbol *sym = NULL;
1628 map = dso__new_map(tp->module);
1632 sym = map__find_symbol(map, addr, NULL);
1634 addr = kernel_get_symbol_address_by_name(tp->symbol, true);
1637 sym = __find_kernel_function(addr, &map);
1643 pp->retprobe = tp->retprobe;
1644 pp->offset = addr - map->unmap_ip(map, sym->start);
1645 pp->function = strdup(sym->name);
1646 ret = pp->function ? 0 : -ENOMEM;
1649 if (map && !is_kprobe) {
1650 dso__delete(map->dso);
1657 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
1658 struct perf_probe_point *pp,
1664 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
1667 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
1671 pr_debug("Failed to find probe point from both of dwarf and map.\n");
1674 pp->function = strdup(tp->symbol);
1675 pp->offset = tp->offset;
1676 } else if (!tp->module && !is_kprobe) {
1677 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
1680 pp->function = strdup(buf);
1683 if (pp->function == NULL)
1686 pp->retprobe = tp->retprobe;
1691 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
1692 struct perf_probe_event *pev, bool is_kprobe)
1697 /* Convert event/group name */
1698 pev->event = strdup(tev->event);
1699 pev->group = strdup(tev->group);
1700 if (pev->event == NULL || pev->group == NULL)
1703 /* Convert trace_point to probe_point */
1704 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
1708 /* Convert trace_arg to probe_arg */
1709 pev->nargs = tev->nargs;
1710 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1711 if (pev->args == NULL)
1713 for (i = 0; i < tev->nargs && ret >= 0; i++) {
1714 if (tev->args[i].name)
1715 pev->args[i].name = strdup(tev->args[i].name);
1717 ret = synthesize_probe_trace_arg(&tev->args[i],
1719 pev->args[i].name = strdup(buf);
1721 if (pev->args[i].name == NULL && ret >= 0)
1726 clear_perf_probe_event(pev);
1731 void clear_perf_probe_event(struct perf_probe_event *pev)
1733 struct perf_probe_point *pp = &pev->point;
1734 struct perf_probe_arg_field *field, *next;
1741 free(pp->lazy_line);
1743 for (i = 0; i < pev->nargs; i++) {
1744 free(pev->args[i].name);
1745 free(pev->args[i].var);
1746 free(pev->args[i].type);
1747 field = pev->args[i].field;
1750 zfree(&field->name);
1756 memset(pev, 0, sizeof(*pev));
1759 static void clear_probe_trace_event(struct probe_trace_event *tev)
1761 struct probe_trace_arg_ref *ref, *next;
1766 free(tev->point.symbol);
1767 free(tev->point.module);
1768 for (i = 0; i < tev->nargs; i++) {
1769 free(tev->args[i].name);
1770 free(tev->args[i].value);
1771 free(tev->args[i].type);
1772 ref = tev->args[i].ref;
1780 memset(tev, 0, sizeof(*tev));
1783 static void print_warn_msg(const char *file, bool is_kprobe)
1786 if (errno == ENOENT) {
1790 config = "CONFIG_UPROBE_EVENTS";
1792 config = "CONFIG_KPROBE_EVENTS";
1794 pr_warning("%s file does not exist - please rebuild kernel"
1795 " with %s.\n", file, config);
1797 pr_warning("Failed to open %s file: %s\n", file,
1801 static int open_probe_events(const char *trace_file, bool readwrite,
1805 const char *__debugfs;
1808 __debugfs = debugfs_find_mountpoint();
1809 if (__debugfs == NULL) {
1810 pr_warning("Debugfs is not mounted.\n");
1814 ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file);
1816 pr_debug("Opening %s write=%d\n", buf, readwrite);
1817 if (readwrite && !probe_event_dry_run)
1818 ret = open(buf, O_RDWR, O_APPEND);
1820 ret = open(buf, O_RDONLY, 0);
1823 print_warn_msg(buf, is_kprobe);
1828 static int open_kprobe_events(bool readwrite)
1830 return open_probe_events("tracing/kprobe_events", readwrite, true);
1833 static int open_uprobe_events(bool readwrite)
1835 return open_probe_events("tracing/uprobe_events", readwrite, false);
1838 /* Get raw string list of current kprobe_events or uprobe_events */
1839 static struct strlist *get_probe_trace_command_rawlist(int fd)
1843 char buf[MAX_CMDLEN];
1847 sl = strlist__new(true, NULL);
1849 fp = fdopen(dup(fd), "r");
1851 p = fgets(buf, MAX_CMDLEN, fp);
1855 idx = strlen(p) - 1;
1858 ret = strlist__add(sl, buf);
1860 pr_debug("strlist__add failed: %s\n", strerror(-ret));
1861 strlist__delete(sl);
1871 static int show_perf_probe_event(struct perf_probe_event *pev,
1878 /* Synthesize only event probe point */
1879 place = synthesize_perf_probe_point(&pev->point);
1883 ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event);
1887 printf(" %-20s (on %s", buf, place);
1889 printf(" in %s", module);
1891 if (pev->nargs > 0) {
1893 for (i = 0; i < pev->nargs; i++) {
1894 ret = synthesize_perf_probe_arg(&pev->args[i],
1906 static int __show_perf_probe_events(int fd, bool is_kprobe)
1909 struct probe_trace_event tev;
1910 struct perf_probe_event pev;
1911 struct strlist *rawlist;
1912 struct str_node *ent;
1914 memset(&tev, 0, sizeof(tev));
1915 memset(&pev, 0, sizeof(pev));
1917 rawlist = get_probe_trace_command_rawlist(fd);
1921 strlist__for_each(ent, rawlist) {
1922 ret = parse_probe_trace_command(ent->s, &tev);
1924 ret = convert_to_perf_probe_event(&tev, &pev,
1927 ret = show_perf_probe_event(&pev,
1930 clear_perf_probe_event(&pev);
1931 clear_probe_trace_event(&tev);
1935 strlist__delete(rawlist);
1940 /* List up current perf-probe events */
1941 int show_perf_probe_events(void)
1946 fd = open_kprobe_events(false);
1951 ret = init_symbol_maps(false);
1955 ret = __show_perf_probe_events(fd, true);
1958 fd = open_uprobe_events(false);
1960 ret = __show_perf_probe_events(fd, false);
1968 /* Get current perf-probe event names */
1969 static struct strlist *get_probe_trace_event_names(int fd, bool include_group)
1972 struct strlist *sl, *rawlist;
1973 struct str_node *ent;
1974 struct probe_trace_event tev;
1977 memset(&tev, 0, sizeof(tev));
1978 rawlist = get_probe_trace_command_rawlist(fd);
1979 sl = strlist__new(true, NULL);
1980 strlist__for_each(ent, rawlist) {
1981 ret = parse_probe_trace_command(ent->s, &tev);
1984 if (include_group) {
1985 ret = e_snprintf(buf, 128, "%s:%s", tev.group,
1988 ret = strlist__add(sl, buf);
1990 ret = strlist__add(sl, tev.event);
1991 clear_probe_trace_event(&tev);
1995 strlist__delete(rawlist);
1998 strlist__delete(sl);
2004 static int write_probe_trace_event(int fd, struct probe_trace_event *tev)
2007 char *buf = synthesize_probe_trace_command(tev);
2010 pr_debug("Failed to synthesize probe trace event.\n");
2014 pr_debug("Writing event: %s\n", buf);
2015 if (!probe_event_dry_run) {
2016 ret = write(fd, buf, strlen(buf));
2018 pr_warning("Failed to write event: %s\n",
2025 static int get_new_event_name(char *buf, size_t len, const char *base,
2026 struct strlist *namelist, bool allow_suffix)
2031 ret = e_snprintf(buf, len, "%s", base);
2033 pr_debug("snprintf() failed: %s\n", strerror(-ret));
2036 if (!strlist__has_entry(namelist, buf))
2039 if (!allow_suffix) {
2040 pr_warning("Error: event \"%s\" already exists. "
2041 "(Use -f to force duplicates.)\n", base);
2045 /* Try to add suffix */
2046 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2047 ret = e_snprintf(buf, len, "%s_%d", base, i);
2049 pr_debug("snprintf() failed: %s\n", strerror(-ret));
2052 if (!strlist__has_entry(namelist, buf))
2055 if (i == MAX_EVENT_INDEX) {
2056 pr_warning("Too many events are on the same function.\n");
2063 static int __add_probe_trace_events(struct perf_probe_event *pev,
2064 struct probe_trace_event *tevs,
2065 int ntevs, bool allow_suffix)
2068 struct probe_trace_event *tev = NULL;
2070 const char *event, *group;
2071 struct strlist *namelist;
2074 fd = open_uprobe_events(true);
2076 fd = open_kprobe_events(true);
2080 /* Get current event names */
2081 namelist = get_probe_trace_event_names(fd, false);
2083 pr_debug("Failed to get current event list.\n");
2088 printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":");
2089 for (i = 0; i < ntevs; i++) {
2094 if (pev->point.function)
2095 event = pev->point.function;
2097 event = tev->point.symbol;
2101 group = PERFPROBE_GROUP;
2103 /* Get an unused new event name */
2104 ret = get_new_event_name(buf, 64, event,
2105 namelist, allow_suffix);
2110 tev->event = strdup(event);
2111 tev->group = strdup(group);
2112 if (tev->event == NULL || tev->group == NULL) {
2116 ret = write_probe_trace_event(fd, tev);
2119 /* Add added event name to namelist */
2120 strlist__add(namelist, event);
2122 /* Trick here - save current event/group */
2125 pev->event = tev->event;
2126 pev->group = tev->group;
2127 show_perf_probe_event(pev, tev->point.module);
2128 /* Trick here - restore current event/group */
2129 pev->event = (char *)event;
2130 pev->group = (char *)group;
2133 * Probes after the first probe which comes from same
2134 * user input are always allowed to add suffix, because
2135 * there might be several addresses corresponding to
2138 allow_suffix = true;
2142 /* Show how to use the event. */
2143 printf("\nYou can now use it in all perf tools, such as:\n\n");
2144 printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group,
2148 strlist__delete(namelist);
2153 static char *looking_function_name;
2154 static int num_matched_functions;
2156 static int probe_function_filter(struct map *map __maybe_unused,
2159 if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) &&
2160 strcmp(looking_function_name, sym->name) == 0) {
2161 num_matched_functions++;
2167 #define strdup_or_goto(str, label) \
2168 ({ char *__p = strdup(str); if (!__p) goto label; __p; })
2171 * Find probe function addresses from map.
2172 * Return an error or the number of found probe_trace_event
2174 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2175 struct probe_trace_event **tevs,
2176 int max_tevs, const char *target)
2178 struct map *map = NULL;
2179 struct kmap *kmap = NULL;
2180 struct ref_reloc_sym *reloc_sym = NULL;
2183 struct probe_trace_event *tev;
2184 struct perf_probe_point *pp = &pev->point;
2185 struct probe_trace_point *tp;
2188 /* Init maps of given executable or kernel */
2190 map = dso__new_map(target);
2192 map = kernel_get_module_map(target);
2199 * Load matched symbols: Since the different local symbols may have
2200 * same name but different addresses, this lists all the symbols.
2202 num_matched_functions = 0;
2203 looking_function_name = pp->function;
2204 ret = map__load(map, probe_function_filter);
2205 if (ret || num_matched_functions == 0) {
2206 pr_err("Failed to find symbol %s in %s\n", pp->function,
2207 target ? : "kernel");
2210 } else if (num_matched_functions > max_tevs) {
2211 pr_err("Too many functions matched in %s\n",
2212 target ? : "kernel");
2217 if (!pev->uprobes) {
2218 kmap = map__kmap(map);
2219 reloc_sym = kmap->ref_reloc_sym;
2221 pr_warning("Relocated base symbol is not found!\n");
2227 /* Setup result trace-probe-events */
2228 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2235 map__for_each_symbol(map, sym, nd) {
2236 tev = (*tevs) + ret;
2238 if (ret == num_matched_functions) {
2239 pr_warning("Too many symbols are listed. Skip it.\n");
2244 if (pp->offset > sym->end - sym->start) {
2245 pr_warning("Offset %ld is bigger than the size of %s\n",
2246 pp->offset, sym->name);
2250 /* Add one probe point */
2251 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2253 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2254 tp->offset = tp->address - reloc_sym->addr;
2256 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2257 tp->offset = pp->offset;
2259 tp->retprobe = pp->retprobe;
2261 tev->point.module = strdup_or_goto(target, nomem_out);
2262 tev->uprobes = pev->uprobes;
2263 tev->nargs = pev->nargs;
2265 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2267 if (tev->args == NULL)
2270 for (i = 0; i < tev->nargs; i++) {
2271 if (pev->args[i].name)
2273 strdup_or_goto(pev->args[i].name,
2276 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2278 if (pev->args[i].type)
2280 strdup_or_goto(pev->args[i].type,
2286 if (map && pev->uprobes) {
2287 /* Only when using uprobe(exec) map needs to be released */
2288 dso__delete(map->dso);
2296 clear_probe_trace_events(*tevs, num_matched_functions);
2301 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
2302 struct probe_trace_event **tevs,
2303 int max_tevs, const char *target)
2307 if (pev->uprobes && !pev->group) {
2308 /* Replace group name if not given */
2309 ret = convert_exec_to_group(target, &pev->group);
2311 pr_warning("Failed to make a group name.\n");
2316 /* Convert perf_probe_event with debuginfo */
2317 ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target);
2319 return ret; /* Found in debuginfo or got an error */
2321 return find_probe_trace_events_from_map(pev, tevs, max_tevs, target);
2324 struct __event_package {
2325 struct perf_probe_event *pev;
2326 struct probe_trace_event *tevs;
2330 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
2331 int max_tevs, const char *target, bool force_add)
2334 struct __event_package *pkgs;
2337 pkgs = zalloc(sizeof(struct __event_package) * npevs);
2342 ret = init_symbol_maps(pevs->uprobes);
2348 /* Loop 1: convert all events */
2349 for (i = 0; i < npevs; i++) {
2350 pkgs[i].pev = &pevs[i];
2351 /* Convert with or without debuginfo */
2352 ret = convert_to_probe_trace_events(pkgs[i].pev,
2358 pkgs[i].ntevs = ret;
2361 /* Loop 2: add all events */
2362 for (i = 0; i < npevs; i++) {
2363 ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs,
2364 pkgs[i].ntevs, force_add);
2369 /* Loop 3: cleanup and free trace events */
2370 for (i = 0; i < npevs; i++) {
2371 for (j = 0; j < pkgs[i].ntevs; j++)
2372 clear_probe_trace_event(&pkgs[i].tevs[j]);
2373 zfree(&pkgs[i].tevs);
2381 static int __del_trace_probe_event(int fd, struct str_node *ent)
2387 /* Convert from perf-probe event to trace-probe event */
2388 ret = e_snprintf(buf, 128, "-:%s", ent->s);
2392 p = strchr(buf + 2, ':');
2394 pr_debug("Internal error: %s should have ':' but not.\n",
2401 pr_debug("Writing event: %s\n", buf);
2402 ret = write(fd, buf, strlen(buf));
2408 printf("Removed event: %s\n", ent->s);
2411 pr_warning("Failed to delete event: %s\n", strerror(-ret));
2415 static int del_trace_probe_event(int fd, const char *buf,
2416 struct strlist *namelist)
2418 struct str_node *ent, *n;
2421 if (strpbrk(buf, "*?")) { /* Glob-exp */
2422 strlist__for_each_safe(ent, n, namelist)
2423 if (strglobmatch(ent->s, buf)) {
2424 ret = __del_trace_probe_event(fd, ent);
2427 strlist__remove(namelist, ent);
2430 ent = strlist__find(namelist, buf);
2432 ret = __del_trace_probe_event(fd, ent);
2434 strlist__remove(namelist, ent);
2441 int del_perf_probe_events(struct strlist *dellist)
2443 int ret = -1, ufd = -1, kfd = -1;
2445 const char *group, *event;
2447 struct str_node *ent;
2448 struct strlist *namelist = NULL, *unamelist = NULL;
2450 /* Get current event names */
2451 kfd = open_kprobe_events(true);
2455 namelist = get_probe_trace_event_names(kfd, true);
2456 ufd = open_uprobe_events(true);
2459 unamelist = get_probe_trace_event_names(ufd, true);
2461 if (namelist == NULL && unamelist == NULL)
2464 strlist__for_each(ent, dellist) {
2465 str = strdup(ent->s);
2470 pr_debug("Parsing: %s\n", str);
2471 p = strchr(str, ':');
2481 ret = e_snprintf(buf, 128, "%s:%s", group, event);
2483 pr_err("Failed to copy event.");
2488 pr_debug("Group: %s, Event: %s\n", group, event);
2491 ret = del_trace_probe_event(kfd, buf, namelist);
2493 if (unamelist && ret != 0)
2494 ret = del_trace_probe_event(ufd, buf, unamelist);
2497 pr_info("Info: Event \"%s\" does not exist.\n", buf);
2504 strlist__delete(namelist);
2509 strlist__delete(unamelist);
2516 /* TODO: don't use a global variable for filter ... */
2517 static struct strfilter *available_func_filter;
2520 * If a symbol corresponds to a function with global binding and
2521 * matches filter return 0. For all others return 1.
2523 static int filter_available_functions(struct map *map __maybe_unused,
2526 if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) &&
2527 strfilter__compare(available_func_filter, sym->name))
2532 int show_available_funcs(const char *target, struct strfilter *_filter,
2538 ret = init_symbol_maps(user);
2542 /* Get a symbol map */
2544 map = dso__new_map(target);
2546 map = kernel_get_module_map(target);
2548 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
2552 /* Load symbols with given filter */
2553 available_func_filter = _filter;
2554 if (map__load(map, filter_available_functions)) {
2555 pr_err("Failed to load symbols in %s\n", (target) ? : "kernel");
2558 if (!dso__sorted_by_name(map->dso, map->type))
2559 dso__sort_by_name(map->dso, map->type);
2561 /* Show all (filtered) symbols */
2563 dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
2566 dso__delete(map->dso);