2 * probe-event.c : perf-probe definition to kprobe_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>
45 #include "parse-events.h" /* For debugfs_path */
46 #include "probe-event.h"
47 #include "probe-finder.h"
49 #define MAX_CMDLEN 256
50 #define MAX_PROBE_ARGS 128
51 #define PERFPROBE_GROUP "probe"
53 bool probe_event_dry_run; /* Dry run flag */
55 #define semantic_error(msg ...) die("Semantic error :" msg)
57 /* If there is no space to write, returns -E2BIG. */
58 static int e_snprintf(char *str, size_t size, const char *format, ...)
59 __attribute__((format(printf, 3, 4)));
61 static int e_snprintf(char *str, size_t size, const char *format, ...)
66 ret = vsnprintf(str, size, format, ap);
73 static struct map_groups kmap_groups;
74 static struct map *kmaps[MAP__NR_TYPES];
76 /* Initialize symbol maps for vmlinux */
77 static void init_vmlinux(void)
79 symbol_conf.sort_by_name = true;
80 if (symbol_conf.vmlinux_name == NULL)
81 symbol_conf.try_vmlinux_path = true;
83 pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name);
84 if (symbol__init() < 0)
85 die("Failed to init symbol map.");
87 map_groups__init(&kmap_groups);
88 if (map_groups__create_kernel_maps(&kmap_groups, kmaps) < 0)
89 die("Failed to create kernel maps.");
92 #ifndef NO_DWARF_SUPPORT
93 static int open_vmlinux(void)
95 if (map__load(kmaps[MAP__FUNCTION], NULL) < 0) {
96 pr_debug("Failed to load kernel map.\n");
99 pr_debug("Try to open %s\n", kmaps[MAP__FUNCTION]->dso->long_name);
100 return open(kmaps[MAP__FUNCTION]->dso->long_name, O_RDONLY);
104 void parse_line_range_desc(const char *arg, struct line_range *lr)
111 * FUNC[:SLN[+NUM|-ELN]]
113 ptr = strchr(arg, ':');
115 lr->start = (unsigned int)strtoul(ptr + 1, &tmp, 0);
117 lr->end = lr->start + (unsigned int)strtoul(tmp + 1,
119 else if (*tmp == '-')
120 lr->end = (unsigned int)strtoul(tmp + 1, &tmp, 0);
123 pr_debug("Line range is %u to %u\n", lr->start, lr->end);
124 if (lr->end && lr->start > lr->end)
125 semantic_error("Start line must be smaller"
128 semantic_error("Tailing with invalid character '%d'.",
130 tmp = xstrndup(arg, (ptr - arg));
134 if (strchr(tmp, '.'))
140 /* Check the name is good for event/group */
141 static bool check_event_name(const char *name)
143 if (!isalpha(*name) && *name != '_')
145 while (*++name != '\0') {
146 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
152 /* Parse probepoint definition. */
153 static void parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
155 struct perf_probe_point *pp = &pev->point;
160 * perf probe [EVENT=]SRC[:LN|;PTN]
161 * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
163 * TODO:Group name support
166 ptr = strpbrk(arg, ";=@+%");
167 if (ptr && *ptr == '=') { /* Event name */
170 ptr = strchr(arg, ':');
171 if (ptr) /* Group name is not supported yet. */
172 semantic_error("Group name is not supported yet.");
173 if (!check_event_name(arg))
174 semantic_error("%s is bad for event name -it must "
175 "follow C symbol-naming rule.", arg);
176 pev->event = xstrdup(arg);
181 ptr = strpbrk(arg, ";:+@%");
187 /* Check arg is function or file and copy it */
188 if (strchr(arg, '.')) /* File */
189 pp->file = xstrdup(arg);
191 pp->function = xstrdup(arg);
193 /* Parse other options */
197 if (c == ';') { /* Lazy pattern must be the last part */
198 pp->lazy_line = xstrdup(arg);
201 ptr = strpbrk(arg, ";:+@%");
207 case ':': /* Line number */
208 pp->line = strtoul(arg, &tmp, 0);
210 semantic_error("There is non-digit char"
213 case '+': /* Byte offset from a symbol */
214 pp->offset = strtoul(arg, &tmp, 0);
216 semantic_error("There is non-digit character"
219 case '@': /* File name */
221 semantic_error("SRC@SRC is not allowed.");
222 pp->file = xstrdup(arg);
224 case '%': /* Probe places */
225 if (strcmp(arg, "return") == 0) {
227 } else /* Others not supported yet */
228 semantic_error("%%%s is not supported.", arg);
231 DIE_IF("Program has a bug.");
236 /* Exclusion check */
237 if (pp->lazy_line && pp->line)
238 semantic_error("Lazy pattern can't be used with line number.");
240 if (pp->lazy_line && pp->offset)
241 semantic_error("Lazy pattern can't be used with offset.");
243 if (pp->line && pp->offset)
244 semantic_error("Offset can't be used with line number.");
246 if (!pp->line && !pp->lazy_line && pp->file && !pp->function)
247 semantic_error("File always requires line number or "
250 if (pp->offset && !pp->function)
251 semantic_error("Offset requires an entry function.");
253 if (pp->retprobe && !pp->function)
254 semantic_error("Return probe requires an entry function.");
256 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe)
257 semantic_error("Offset/Line/Lazy pattern can't be used with "
260 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
261 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
265 /* Parse perf-probe event argument */
266 static void parse_perf_probe_arg(const char *str, struct perf_probe_arg *arg)
269 struct perf_probe_arg_field **fieldp;
271 pr_debug("parsing arg: %s into ", str);
273 tmp = strpbrk(str, "-.");
274 if (!is_c_varname(str) || !tmp) {
275 /* A variable, register, symbol or special value */
276 arg->name = xstrdup(str);
277 pr_debug("%s\n", arg->name);
281 /* Structure fields */
282 arg->name = xstrndup(str, tmp - str);
283 pr_debug("%s, ", arg->name);
284 fieldp = &arg->field;
287 *fieldp = xzalloc(sizeof(struct perf_probe_arg_field));
290 (*fieldp)->ref = false;
291 } else if (tmp[1] == '>') {
293 (*fieldp)->ref = true;
295 semantic_error("Argument parse error: %s", str);
297 tmp = strpbrk(str, "-.");
299 (*fieldp)->name = xstrndup(str, tmp - str);
300 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
301 fieldp = &(*fieldp)->next;
304 (*fieldp)->name = xstrdup(str);
305 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
308 /* Parse perf-probe event command */
309 void parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
314 argv = argv_split(cmd, &argc);
316 die("argv_split failed.");
317 if (argc > MAX_PROBE_ARGS + 1)
318 semantic_error("Too many arguments");
320 /* Parse probe point */
321 parse_perf_probe_point(argv[0], pev);
323 /* Copy arguments and ensure return probe has no C argument */
324 pev->nargs = argc - 1;
325 pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs);
326 for (i = 0; i < pev->nargs; i++) {
327 parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
328 if (is_c_varname(pev->args[i].name) && pev->point.retprobe)
329 semantic_error("You can't specify local variable for"
336 /* Return true if this perf_probe_event requires debuginfo */
337 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
341 if (pev->point.file || pev->point.line || pev->point.lazy_line)
344 for (i = 0; i < pev->nargs; i++)
345 if (is_c_varname(pev->args[i].name))
351 /* Parse kprobe_events event into struct probe_point */
352 void parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev)
354 struct kprobe_trace_point *tp = &tev->point;
360 pr_debug("Parsing kprobe_events: %s\n", cmd);
361 argv = argv_split(cmd, &argc);
363 die("argv_split failed.");
365 semantic_error("Too less arguments.");
367 /* Scan event and group name. */
368 ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]",
369 &pr, (float *)(void *)&tev->group,
370 (float *)(void *)&tev->event);
372 semantic_error("Failed to parse event name: %s", argv[0]);
373 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
375 tp->retprobe = (pr == 'r');
377 /* Scan function name and offset */
378 ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol,
383 tev->nargs = argc - 2;
384 tev->args = xzalloc(sizeof(struct kprobe_trace_arg) * tev->nargs);
385 for (i = 0; i < tev->nargs; i++) {
386 p = strchr(argv[i + 2], '=');
387 if (p) /* We don't need which register is assigned. */
391 tev->args[i].name = xstrdup(argv[i + 2]);
392 /* TODO: parse regs and offset */
393 tev->args[i].value = xstrdup(p);
399 /* Compose only probe arg */
400 int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len)
402 struct perf_probe_arg_field *field = pa->field;
406 ret = e_snprintf(tmp, len, "%s", pa->name);
413 ret = e_snprintf(tmp, len, "%s%s", field->ref ? "->" : ".",
423 die("Failed to synthesize perf probe argument: %s", strerror(-ret));
426 /* Compose only probe point (not argument) */
427 static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
430 char offs[32] = "", line[32] = "", file[32] = "";
433 buf = xzalloc(MAX_CMDLEN);
435 ret = e_snprintf(offs, 32, "+%lu", pp->offset);
440 ret = e_snprintf(line, 32, ":%d", pp->line);
445 len = strlen(pp->file) - 32;
448 tmp = strchr(pp->file + len, '/');
450 tmp = pp->file + len - 1;
451 ret = e_snprintf(file, 32, "@%s", tmp + 1);
457 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function,
458 offs, pp->retprobe ? "%return" : "", line,
461 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line);
467 die("Failed to synthesize perf probe point: %s", strerror(-ret));
471 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
476 buf = synthesize_perf_probe_point(&pev->point);
481 for (i = 0; i < pev->nargs; i++) {
482 ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
495 static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref,
496 char **buf, size_t *buflen,
501 depth = __synthesize_kprobe_trace_arg_ref(ref->next, buf,
507 ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset);
519 static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg,
520 char *buf, size_t buflen)
525 /* Argument name or separator */
527 ret = e_snprintf(buf, buflen, " %s=", arg->name);
529 ret = e_snprintf(buf, buflen, " ");
535 /* Dereferencing arguments */
537 depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf,
543 /* Print argument value */
544 ret = e_snprintf(buf, buflen, "%s", arg->value);
552 ret = e_snprintf(buf, buflen, ")");
562 char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev)
564 struct kprobe_trace_point *tp = &tev->point;
568 buf = xzalloc(MAX_CMDLEN);
569 len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu",
570 tp->retprobe ? 'r' : 'p',
571 tev->group, tev->event,
572 tp->symbol, tp->offset);
576 for (i = 0; i < tev->nargs; i++) {
577 ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len,
590 void convert_to_perf_probe_event(struct kprobe_trace_event *tev,
591 struct perf_probe_event *pev)
595 #ifndef NO_DWARF_SUPPORT
599 sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION],
600 tev->point.symbol, NULL);
603 ret = find_perf_probe_point(fd, sym->start + tev->point.offset,
608 pev->point.function = xstrdup(tev->point.symbol);
609 pev->point.offset = tev->point.offset;
612 /* Convert trace_point to probe_point */
613 pev->point.function = xstrdup(tev->point.symbol);
614 pev->point.offset = tev->point.offset;
616 pev->point.retprobe = tev->point.retprobe;
618 pev->event = xstrdup(tev->event);
619 pev->group = xstrdup(tev->group);
621 /* Convert trace_arg to probe_arg */
622 pev->nargs = tev->nargs;
623 pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs);
624 for (i = 0; i < tev->nargs; i++)
625 if (tev->args[i].name)
626 pev->args[i].name = xstrdup(tev->args[i].name);
628 synthesize_kprobe_trace_arg(&tev->args[i], buf, 64);
629 pev->args[i].name = xstrdup(buf);
633 void clear_perf_probe_event(struct perf_probe_event *pev)
635 struct perf_probe_point *pp = &pev->point;
636 struct perf_probe_arg_field *field, *next;
649 for (i = 0; i < pev->nargs; i++) {
650 if (pev->args[i].name)
651 free(pev->args[i].name);
652 field = pev->args[i].field;
663 memset(pev, 0, sizeof(*pev));
666 void clear_kprobe_trace_event(struct kprobe_trace_event *tev)
668 struct kprobe_trace_arg_ref *ref, *next;
675 if (tev->point.symbol)
676 free(tev->point.symbol);
677 for (i = 0; i < tev->nargs; i++) {
678 if (tev->args[i].name)
679 free(tev->args[i].name);
680 if (tev->args[i].value)
681 free(tev->args[i].value);
682 ref = tev->args[i].ref;
691 memset(tev, 0, sizeof(*tev));
694 static int open_kprobe_events(bool readwrite)
699 ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path);
701 die("Failed to make kprobe_events path.");
703 if (readwrite && !probe_event_dry_run)
704 ret = open(buf, O_RDWR, O_APPEND);
706 ret = open(buf, O_RDONLY, 0);
710 die("kprobe_events file does not exist -"
711 " please rebuild with CONFIG_KPROBE_EVENT.");
713 die("Could not open kprobe_events file: %s",
719 /* Get raw string list of current kprobe_events */
720 static struct strlist *get_kprobe_trace_command_rawlist(int fd)
724 char buf[MAX_CMDLEN];
728 sl = strlist__new(true, NULL);
730 fp = fdopen(dup(fd), "r");
732 p = fgets(buf, MAX_CMDLEN, fp);
739 ret = strlist__add(sl, buf);
741 die("strlist__add failed: %s", strerror(-ret));
749 static void show_perf_probe_event(struct perf_probe_event *pev)
755 /* Synthesize only event probe point */
756 place = synthesize_perf_probe_point(&pev->point);
758 ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event);
760 die("Failed to copy event: %s", strerror(-ret));
761 printf(" %-20s (on %s", buf, place);
763 if (pev->nargs > 0) {
765 for (i = 0; i < pev->nargs; i++) {
766 synthesize_perf_probe_arg(&pev->args[i], buf, 128);
774 /* List up current perf-probe events */
775 void show_perf_probe_events(void)
778 struct kprobe_trace_event tev;
779 struct perf_probe_event pev;
780 struct strlist *rawlist;
781 struct str_node *ent;
786 memset(&tev, 0, sizeof(tev));
787 memset(&pev, 0, sizeof(pev));
789 fd = open_kprobe_events(false);
790 rawlist = get_kprobe_trace_command_rawlist(fd);
793 strlist__for_each(ent, rawlist) {
794 parse_kprobe_trace_command(ent->s, &tev);
795 convert_to_perf_probe_event(&tev, &pev);
797 show_perf_probe_event(&pev);
798 clear_perf_probe_event(&pev);
799 clear_kprobe_trace_event(&tev);
802 strlist__delete(rawlist);
805 /* Get current perf-probe event names */
806 static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group)
809 struct strlist *sl, *rawlist;
810 struct str_node *ent;
811 struct kprobe_trace_event tev;
813 memset(&tev, 0, sizeof(tev));
815 rawlist = get_kprobe_trace_command_rawlist(fd);
816 sl = strlist__new(true, NULL);
817 strlist__for_each(ent, rawlist) {
818 parse_kprobe_trace_command(ent->s, &tev);
820 if (e_snprintf(buf, 128, "%s:%s", tev.group,
822 die("Failed to copy group:event name.");
823 strlist__add(sl, buf);
825 strlist__add(sl, tev.event);
826 clear_kprobe_trace_event(&tev);
829 strlist__delete(rawlist);
834 static void write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev)
837 char *buf = synthesize_kprobe_trace_command(tev);
839 pr_debug("Writing event: %s\n", buf);
840 if (!probe_event_dry_run) {
841 ret = write(fd, buf, strlen(buf));
843 die("Failed to write event: %s", strerror(errno));
848 static void get_new_event_name(char *buf, size_t len, const char *base,
849 struct strlist *namelist, bool allow_suffix)
854 ret = e_snprintf(buf, len, "%s", base);
856 die("snprintf() failed: %s", strerror(-ret));
857 if (!strlist__has_entry(namelist, buf))
861 pr_warning("Error: event \"%s\" already exists. "
862 "(Use -f to force duplicates.)\n", base);
863 die("Can't add new event.");
866 /* Try to add suffix */
867 for (i = 1; i < MAX_EVENT_INDEX; i++) {
868 ret = e_snprintf(buf, len, "%s_%d", base, i);
870 die("snprintf() failed: %s", strerror(-ret));
871 if (!strlist__has_entry(namelist, buf))
874 if (i == MAX_EVENT_INDEX)
875 die("Too many events are on the same function.");
878 static void __add_kprobe_trace_events(struct perf_probe_event *pev,
879 struct kprobe_trace_event *tevs,
880 int ntevs, bool allow_suffix)
883 struct kprobe_trace_event *tev = NULL;
885 const char *event, *group;
886 struct strlist *namelist;
888 fd = open_kprobe_events(true);
889 /* Get current event names */
890 namelist = get_kprobe_trace_event_names(fd, false);
892 printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":");
893 for (i = 0; i < ntevs; i++) {
898 if (pev->point.function)
899 event = pev->point.function;
901 event = tev->point.symbol;
905 group = PERFPROBE_GROUP;
907 /* Get an unused new event name */
908 get_new_event_name(buf, 64, event, namelist, allow_suffix);
911 tev->event = xstrdup(event);
912 tev->group = xstrdup(group);
913 write_kprobe_trace_event(fd, tev);
914 /* Add added event name to namelist */
915 strlist__add(namelist, event);
917 /* Trick here - save current event/group */
920 pev->event = tev->event;
921 pev->group = tev->group;
922 show_perf_probe_event(pev);
923 /* Trick here - restore current event/group */
924 pev->event = (char *)event;
925 pev->group = (char *)group;
928 * Probes after the first probe which comes from same
929 * user input are always allowed to add suffix, because
930 * there might be several addresses corresponding to
935 /* Show how to use the event. */
936 printf("\nYou can now use it on all perf tools, such as:\n\n");
937 printf("\tperf record -e %s:%s -a sleep 1\n\n", tev->group, tev->event);
939 strlist__delete(namelist);
943 static int convert_to_kprobe_trace_events(struct perf_probe_event *pev,
944 struct kprobe_trace_event **tevs)
948 #ifndef NO_DWARF_SUPPORT
952 struct kprobe_trace_event *tev;
954 need_dwarf = perf_probe_event_need_dwarf(pev);
957 #ifdef NO_DWARF_SUPPORT
958 die("Debuginfo-analysis is not supported");
959 #else /* !NO_DWARF_SUPPORT */
960 pr_debug("Some probes require debuginfo.\n");
965 die("Could not open debuginfo file.");
967 pr_debug("Could not open vmlinux/module file."
968 " Try to use symbols.\n");
972 /* Searching probe points */
973 ntevs = find_kprobe_trace_events(fd, pev, tevs);
975 if (ntevs > 0) /* Found */
978 if (ntevs == 0) /* No error but failed to find probe point. */
979 die("Probe point '%s' not found. - probe not added.",
980 synthesize_perf_probe_point(&pev->point));
984 if (ntevs == -ENOENT)
985 pr_warning("No dwarf info found in the vmlinux - please rebuild with CONFIG_DEBUG_INFO=y.\n");
986 die("Could not analyze debuginfo.");
988 pr_debug("An error occurred in debuginfo analysis."
989 " Try to use symbols.\n");
992 #endif /* !NO_DWARF_SUPPORT */
994 /* Allocate trace event buffer */
996 tev = *tevs = xzalloc(sizeof(struct kprobe_trace_event));
998 /* Copy parameters */
999 tev->point.symbol = xstrdup(pev->point.function);
1000 tev->point.offset = pev->point.offset;
1001 tev->nargs = pev->nargs;
1003 tev->args = xzalloc(sizeof(struct kprobe_trace_arg)
1005 for (i = 0; i < tev->nargs; i++)
1006 tev->args[i].value = xstrdup(pev->args[i].name);
1009 /* Currently just checking function name from symbol map */
1010 sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION],
1011 tev->point.symbol, NULL);
1013 die("Kernel symbol \'%s\' not found - probe not added.",
1015 #ifndef NO_DWARF_SUPPORT
1022 struct __event_package {
1023 struct perf_probe_event *pev;
1024 struct kprobe_trace_event *tevs;
1028 void add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
1032 struct __event_package *pkgs;
1034 pkgs = xzalloc(sizeof(struct __event_package) * npevs);
1036 /* Init vmlinux path */
1039 /* Loop 1: convert all events */
1040 for (i = 0; i < npevs; i++) {
1041 pkgs[i].pev = &pevs[i];
1042 /* Convert with or without debuginfo */
1043 pkgs[i].ntevs = convert_to_kprobe_trace_events(pkgs[i].pev,
1047 /* Loop 2: add all events */
1048 for (i = 0; i < npevs; i++)
1049 __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs,
1050 pkgs[i].ntevs, force_add);
1051 /* TODO: cleanup all trace events? */
1054 static void __del_trace_kprobe_event(int fd, struct str_node *ent)
1060 /* Convert from perf-probe event to trace-kprobe event */
1061 if (e_snprintf(buf, 128, "-:%s", ent->s) < 0)
1062 die("Failed to copy event.");
1063 p = strchr(buf + 2, ':');
1065 die("Internal error: %s should have ':' but not.", ent->s);
1068 pr_debug("Writing event: %s\n", buf);
1069 ret = write(fd, buf, strlen(buf));
1071 die("Failed to write event: %s", strerror(errno));
1072 printf("Remove event: %s\n", ent->s);
1075 static void del_trace_kprobe_event(int fd, const char *group,
1076 const char *event, struct strlist *namelist)
1079 struct str_node *ent, *n;
1082 if (e_snprintf(buf, 128, "%s:%s", group, event) < 0)
1083 die("Failed to copy event.");
1085 if (strpbrk(buf, "*?")) { /* Glob-exp */
1086 strlist__for_each_safe(ent, n, namelist)
1087 if (strglobmatch(ent->s, buf)) {
1089 __del_trace_kprobe_event(fd, ent);
1090 strlist__remove(namelist, ent);
1093 ent = strlist__find(namelist, buf);
1096 __del_trace_kprobe_event(fd, ent);
1097 strlist__remove(namelist, ent);
1101 pr_info("Info: event \"%s\" does not exist, could not remove it.\n", buf);
1104 void del_perf_probe_events(struct strlist *dellist)
1107 const char *group, *event;
1109 struct str_node *ent;
1110 struct strlist *namelist;
1112 fd = open_kprobe_events(true);
1113 /* Get current event names */
1114 namelist = get_kprobe_trace_event_names(fd, true);
1116 strlist__for_each(ent, dellist) {
1117 str = xstrdup(ent->s);
1118 pr_debug("Parsing: %s\n", str);
1119 p = strchr(str, ':');
1128 pr_debug("Group: %s, Event: %s\n", group, event);
1129 del_trace_kprobe_event(fd, group, event, namelist);
1132 strlist__delete(namelist);
1136 #define LINEBUF_SIZE 256
1137 #define NR_ADDITIONAL_LINES 2
1139 static void show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num)
1141 char buf[LINEBUF_SIZE];
1142 const char *color = PERF_COLOR_BLUE;
1144 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
1148 fprintf(stdout, "%7u %s", l, buf);
1150 color_fprintf(stdout, color, " %s", buf);
1153 while (strlen(buf) == LINEBUF_SIZE - 1 &&
1154 buf[LINEBUF_SIZE - 2] != '\n') {
1155 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
1159 fprintf(stdout, "%s", buf);
1161 color_fprintf(stdout, color, "%s", buf);
1167 die("Source file is shorter than expected.");
1169 die("File read error: %s", strerror(errno));
1172 void show_line_range(struct line_range *lr)
1175 struct line_node *ln;
1177 #ifndef NO_DWARF_SUPPORT
1181 /* Search a line range */
1183 #ifndef NO_DWARF_SUPPORT
1184 fd = open_vmlinux();
1186 die("Could not open debuginfo file.");
1187 ret = find_line_range(fd, lr);
1189 die("Source line is not found.\n");
1196 fprintf(stdout, "<%s:%d>\n", lr->function,
1197 lr->start - lr->offset);
1199 fprintf(stdout, "<%s:%d>\n", lr->file, lr->start);
1201 fp = fopen(lr->path, "r");
1203 die("Failed to open %s: %s", lr->path, strerror(errno));
1204 /* Skip to starting line number */
1205 while (l < lr->start)
1206 show_one_line(fp, l++, true, false);
1208 list_for_each_entry(ln, &lr->line_list, list) {
1209 while (ln->line > l)
1210 show_one_line(fp, (l++) - lr->offset, false, false);
1211 show_one_line(fp, (l++) - lr->offset, false, true);
1214 if (lr->end == INT_MAX)
1215 lr->end = l + NR_ADDITIONAL_LINES;
1216 while (l < lr->end && !feof(fp))
1217 show_one_line(fp, (l++) - lr->offset, false, false);