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
259 /* Open new debuginfo of given module */
260 static struct debuginfo *open_debuginfo(const char *module)
264 /* A file path -- this is an offline module */
265 if (module && strchr(module, '/'))
268 path = kernel_get_module_path(module);
271 pr_err("Failed to find path of %s module.\n",
276 return debuginfo__new(path);
279 static int get_text_start_address(const char *exec, unsigned long *address)
284 int fd, ret = -ENOENT;
286 fd = open(exec, O_RDONLY);
290 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
294 if (gelf_getehdr(elf, &ehdr) == NULL)
297 if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL))
300 *address = shdr.sh_addr - shdr.sh_offset;
308 * Convert trace point to probe point with debuginfo
310 static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
311 struct perf_probe_point *pp,
314 struct debuginfo *dinfo = NULL;
315 unsigned long stext = 0;
316 u64 addr = tp->address;
319 /* convert the address to dwarf address */
325 ret = get_text_start_address(tp->module, &stext);
330 addr = kernel_get_symbol_address_by_name(tp->symbol, false);
336 pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
337 tp->module ? : "kernel");
339 dinfo = open_debuginfo(tp->module);
341 ret = debuginfo__find_probe_point(dinfo,
342 (unsigned long)addr, pp);
343 debuginfo__delete(dinfo);
345 pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", addr);
350 pp->retprobe = tp->retprobe;
354 pr_debug("Failed to find corresponding probes from debuginfo.\n");
355 return ret ? : -ENOENT;
358 static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs,
359 int ntevs, const char *exec)
362 unsigned long stext = 0;
367 ret = get_text_start_address(exec, &stext);
371 for (i = 0; i < ntevs && ret >= 0; i++) {
372 /* point.address is the addres of point.symbol + point.offset */
373 tevs[i].point.address -= stext;
374 tevs[i].point.module = strdup(exec);
375 if (!tevs[i].point.module) {
379 tevs[i].uprobes = true;
385 static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
386 int ntevs, const char *module)
394 tmp = strrchr(module, '/');
396 /* This is a module path -- get the module name */
397 module = strdup(tmp + 1);
400 tmp = strchr(module, '.');
403 tmp = (char *)module; /* For free() */
406 for (i = 0; i < ntevs; i++) {
407 tevs[i].point.module = strdup(module);
408 if (!tevs[i].point.module) {
418 /* Post processing the probe events */
419 static int post_process_probe_trace_events(struct probe_trace_event *tevs,
420 int ntevs, const char *module,
423 struct ref_reloc_sym *reloc_sym;
428 return add_exec_to_probe_trace_events(tevs, ntevs, module);
430 /* Note that currently ref_reloc_sym based probe is not for drivers */
432 return add_module_to_probe_trace_events(tevs, ntevs, module);
434 reloc_sym = kernel_get_ref_reloc_sym();
436 pr_warning("Relocated base symbol is not found!\n");
440 for (i = 0; i < ntevs; i++) {
441 if (tevs[i].point.address) {
442 tmp = strdup(reloc_sym->name);
445 free(tevs[i].point.symbol);
446 tevs[i].point.symbol = tmp;
447 tevs[i].point.offset = tevs[i].point.address -
448 reloc_sym->unrelocated_addr;
454 /* Try to find perf_probe_event with debuginfo */
455 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
456 struct probe_trace_event **tevs,
457 int max_tevs, const char *target)
459 bool need_dwarf = perf_probe_event_need_dwarf(pev);
460 struct debuginfo *dinfo;
463 dinfo = open_debuginfo(target);
467 pr_warning("Failed to open debuginfo file.\n");
470 pr_debug("Could not open debuginfo. Try to use symbols.\n");
474 pr_debug("Try to find probe point from debuginfo.\n");
475 /* Searching trace events corresponding to a probe event */
476 ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs);
478 debuginfo__delete(dinfo);
480 if (ntevs > 0) { /* Succeeded to find trace events */
481 pr_debug("Found %d probe_trace_events.\n", ntevs);
482 ret = post_process_probe_trace_events(*tevs, ntevs,
483 target, pev->uprobes);
485 clear_probe_trace_events(*tevs, ntevs);
488 return ret < 0 ? ret : ntevs;
491 if (ntevs == 0) { /* No error but failed to find probe point. */
492 pr_warning("Probe point '%s' not found.\n",
493 synthesize_perf_probe_point(&pev->point));
496 /* Error path : ntevs < 0 */
497 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs);
498 if (ntevs == -EBADF) {
499 pr_warning("Warning: No dwarf info found in the vmlinux - "
500 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
502 pr_debug("Trying to use symbols.\n");
510 * Find a src file from a DWARF tag path. Prepend optional source path prefix
511 * and chop off leading directories that do not exist. Result is passed back as
512 * a newly allocated path on success.
513 * Return 0 if file was found and readable, -errno otherwise.
515 static int get_real_path(const char *raw_path, const char *comp_dir,
518 const char *prefix = symbol_conf.source_prefix;
521 if (raw_path[0] != '/' && comp_dir)
522 /* If not an absolute path, try to use comp_dir */
525 if (access(raw_path, R_OK) == 0) {
526 *new_path = strdup(raw_path);
533 *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2));
538 sprintf(*new_path, "%s/%s", prefix, raw_path);
540 if (access(*new_path, R_OK) == 0)
543 if (!symbol_conf.source_prefix)
544 /* In case of searching comp_dir, don't retry */
552 raw_path = strchr(++raw_path, '/');
566 #define LINEBUF_SIZE 256
567 #define NR_ADDITIONAL_LINES 2
569 static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
571 char buf[LINEBUF_SIZE];
572 const char *color = show_num ? "" : PERF_COLOR_BLUE;
573 const char *prefix = NULL;
576 if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
581 prefix = show_num ? "%7d " : " ";
582 color_fprintf(stdout, color, prefix, l);
584 color_fprintf(stdout, color, "%s", buf);
586 } while (strchr(buf, '\n') == NULL);
591 pr_warning("File read error: %s\n", strerror(errno));
597 static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
599 int rv = __show_one_line(fp, l, skip, show_num);
601 pr_warning("Source file is shorter than expected.\n");
607 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
608 #define show_one_line(f,l) _show_one_line(f,l,false,false)
609 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
610 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
613 * Show line-range always requires debuginfo to find source file and
616 static int __show_line_range(struct line_range *lr, const char *module)
620 struct debuginfo *dinfo;
625 /* Search a line range */
626 dinfo = open_debuginfo(module);
628 pr_warning("Failed to open debuginfo file.\n");
632 ret = debuginfo__find_line_range(dinfo, lr);
633 debuginfo__delete(dinfo);
635 pr_warning("Specified source line is not found.\n");
637 } else if (ret < 0) {
638 pr_warning("Debuginfo analysis failed. (%d)\n", ret);
642 /* Convert source file path */
644 ret = get_real_path(tmp, lr->comp_dir, &lr->path);
645 free(tmp); /* Free old path */
647 pr_warning("Failed to find source file. (%d)\n", ret);
654 fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path,
655 lr->start - lr->offset);
657 fprintf(stdout, "<%s:%d>\n", lr->path, lr->start);
659 fp = fopen(lr->path, "r");
661 pr_warning("Failed to open %s: %s\n", lr->path,
665 /* Skip to starting line number */
666 while (l < lr->start) {
667 ret = skip_one_line(fp, l++);
672 intlist__for_each(ln, lr->line_list) {
673 for (; ln->i > l; l++) {
674 ret = show_one_line(fp, l - lr->offset);
678 ret = show_one_line_with_num(fp, l++ - lr->offset);
683 if (lr->end == INT_MAX)
684 lr->end = l + NR_ADDITIONAL_LINES;
685 while (l <= lr->end) {
686 ret = show_one_line_or_eof(fp, l++ - lr->offset);
695 int show_line_range(struct line_range *lr, const char *module)
699 ret = init_symbol_maps(false);
702 ret = __show_line_range(lr, module);
708 static int show_available_vars_at(struct debuginfo *dinfo,
709 struct perf_probe_event *pev,
710 int max_vls, struct strfilter *_filter,
715 struct str_node *node;
716 struct variable_list *vls = NULL, *vl;
719 buf = synthesize_perf_probe_point(&pev->point);
722 pr_debug("Searching variables at %s\n", buf);
724 ret = debuginfo__find_available_vars_at(dinfo, pev, &vls,
727 pr_err("Failed to find variables at %s (%d)\n", buf, ret);
730 /* Some variables are found */
731 fprintf(stdout, "Available variables at %s\n", buf);
732 for (i = 0; i < ret; i++) {
735 * A probe point might be converted to
736 * several trace points.
738 fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
740 zfree(&vl->point.symbol);
743 strlist__for_each(node, vl->vars) {
744 var = strchr(node->s, '\t') + 1;
745 if (strfilter__compare(_filter, var)) {
746 fprintf(stdout, "\t\t%s\n", node->s);
750 strlist__delete(vl->vars);
753 fprintf(stdout, "\t\t(No matched variables)\n");
761 /* Show available variables on given probe point */
762 int show_available_vars(struct perf_probe_event *pevs, int npevs,
763 int max_vls, const char *module,
764 struct strfilter *_filter, bool externs)
767 struct debuginfo *dinfo;
769 ret = init_symbol_maps(false);
773 dinfo = open_debuginfo(module);
775 pr_warning("Failed to open debuginfo file.\n");
782 for (i = 0; i < npevs && ret >= 0; i++)
783 ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter,
786 debuginfo__delete(dinfo);
792 #else /* !HAVE_DWARF_SUPPORT */
795 find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
796 struct perf_probe_point *pp __maybe_unused,
797 bool is_kprobe __maybe_unused)
802 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
803 struct probe_trace_event **tevs __maybe_unused,
804 int max_tevs __maybe_unused,
805 const char *target __maybe_unused)
807 if (perf_probe_event_need_dwarf(pev)) {
808 pr_warning("Debuginfo-analysis is not supported.\n");
815 int show_line_range(struct line_range *lr __maybe_unused,
816 const char *module __maybe_unused)
818 pr_warning("Debuginfo-analysis is not supported.\n");
822 int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
823 int npevs __maybe_unused, int max_vls __maybe_unused,
824 const char *module __maybe_unused,
825 struct strfilter *filter __maybe_unused,
826 bool externs __maybe_unused)
828 pr_warning("Debuginfo-analysis is not supported.\n");
833 void line_range__clear(struct line_range *lr)
839 intlist__delete(lr->line_list);
840 memset(lr, 0, sizeof(*lr));
843 int line_range__init(struct line_range *lr)
845 memset(lr, 0, sizeof(*lr));
846 lr->line_list = intlist__new(NULL);
853 static int parse_line_num(char **ptr, int *val, const char *what)
855 const char *start = *ptr;
858 *val = strtol(*ptr, ptr, 0);
859 if (errno || *ptr == start) {
860 semantic_error("'%s' is not a valid number.\n", what);
867 * Stuff 'lr' according to the line range described by 'arg'.
868 * The line range syntax is described by:
870 * SRC[:SLN[+NUM|-ELN]]
871 * FNC[@SRC][:SLN[+NUM|-ELN]]
873 int parse_line_range_desc(const char *arg, struct line_range *lr)
875 char *range, *file, *name = strdup(arg);
884 range = strchr(name, ':');
888 err = parse_line_num(&range, &lr->start, "start line");
892 if (*range == '+' || *range == '-') {
893 const char c = *range++;
895 err = parse_line_num(&range, &lr->end, "end line");
900 lr->end += lr->start;
902 * Adjust the number of lines here.
903 * If the number of lines == 1, the
904 * the end of line should be equal to
911 pr_debug("Line range is %d to %d\n", lr->start, lr->end);
914 if (lr->start > lr->end) {
915 semantic_error("Start line must be smaller"
916 " than end line.\n");
919 if (*range != '\0') {
920 semantic_error("Tailing with invalid str '%s'.\n", range);
925 file = strchr(name, '@');
928 lr->file = strdup(++file);
929 if (lr->file == NULL) {
934 } else if (strchr(name, '.'))
945 /* Check the name is good for event/group */
946 static bool check_event_name(const char *name)
948 if (!isalpha(*name) && *name != '_')
950 while (*++name != '\0') {
951 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
957 /* Parse probepoint definition. */
958 static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
960 struct perf_probe_point *pp = &pev->point;
965 * perf probe [EVENT=]SRC[:LN|;PTN]
966 * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
968 * TODO:Group name support
971 ptr = strpbrk(arg, ";=@+%");
972 if (ptr && *ptr == '=') { /* Event name */
975 if (strchr(arg, ':')) {
976 semantic_error("Group name is not supported yet.\n");
979 if (!check_event_name(arg)) {
980 semantic_error("%s is bad for event name -it must "
981 "follow C symbol-naming rule.\n", arg);
984 pev->event = strdup(arg);
985 if (pev->event == NULL)
991 ptr = strpbrk(arg, ";:+@%");
1001 /* Check arg is function or file and copy it */
1002 if (strchr(tmp, '.')) /* File */
1007 /* Parse other options */
1011 if (c == ';') { /* Lazy pattern must be the last part */
1012 pp->lazy_line = strdup(arg);
1013 if (pp->lazy_line == NULL)
1017 ptr = strpbrk(arg, ";:+@%");
1023 case ':': /* Line number */
1024 pp->line = strtoul(arg, &tmp, 0);
1026 semantic_error("There is non-digit char"
1027 " in line number.\n");
1031 case '+': /* Byte offset from a symbol */
1032 pp->offset = strtoul(arg, &tmp, 0);
1034 semantic_error("There is non-digit character"
1039 case '@': /* File name */
1041 semantic_error("SRC@SRC is not allowed.\n");
1044 pp->file = strdup(arg);
1045 if (pp->file == NULL)
1048 case '%': /* Probe places */
1049 if (strcmp(arg, "return") == 0) {
1051 } else { /* Others not supported yet */
1052 semantic_error("%%%s is not supported.\n", arg);
1056 default: /* Buggy case */
1057 pr_err("This program has a bug at %s:%d.\n",
1058 __FILE__, __LINE__);
1064 /* Exclusion check */
1065 if (pp->lazy_line && pp->line) {
1066 semantic_error("Lazy pattern can't be used with"
1071 if (pp->lazy_line && pp->offset) {
1072 semantic_error("Lazy pattern can't be used with offset.\n");
1076 if (pp->line && pp->offset) {
1077 semantic_error("Offset can't be used with line number.\n");
1081 if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
1082 semantic_error("File always requires line number or "
1087 if (pp->offset && !pp->function) {
1088 semantic_error("Offset requires an entry function.\n");
1092 if (pp->retprobe && !pp->function) {
1093 semantic_error("Return probe requires an entry function.\n");
1097 if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
1098 semantic_error("Offset/Line/Lazy pattern can't be used with "
1103 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1104 pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
1109 /* Parse perf-probe event argument */
1110 static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
1112 char *tmp, *goodname;
1113 struct perf_probe_arg_field **fieldp;
1115 pr_debug("parsing arg: %s into ", str);
1117 tmp = strchr(str, '=');
1119 arg->name = strndup(str, tmp - str);
1120 if (arg->name == NULL)
1122 pr_debug("name:%s ", arg->name);
1126 tmp = strchr(str, ':');
1127 if (tmp) { /* Type setting */
1129 arg->type = strdup(tmp + 1);
1130 if (arg->type == NULL)
1132 pr_debug("type:%s ", arg->type);
1135 tmp = strpbrk(str, "-.[");
1136 if (!is_c_varname(str) || !tmp) {
1137 /* A variable, register, symbol or special value */
1138 arg->var = strdup(str);
1139 if (arg->var == NULL)
1141 pr_debug("%s\n", arg->var);
1145 /* Structure fields or array element */
1146 arg->var = strndup(str, tmp - str);
1147 if (arg->var == NULL)
1149 goodname = arg->var;
1150 pr_debug("%s, ", arg->var);
1151 fieldp = &arg->field;
1154 *fieldp = zalloc(sizeof(struct perf_probe_arg_field));
1155 if (*fieldp == NULL)
1157 if (*tmp == '[') { /* Array */
1159 (*fieldp)->index = strtol(str + 1, &tmp, 0);
1160 (*fieldp)->ref = true;
1161 if (*tmp != ']' || tmp == str + 1) {
1162 semantic_error("Array index must be a"
1169 } else { /* Structure */
1172 (*fieldp)->ref = false;
1173 } else if (tmp[1] == '>') {
1175 (*fieldp)->ref = true;
1177 semantic_error("Argument parse error: %s\n",
1181 tmp = strpbrk(str, "-.[");
1184 (*fieldp)->name = strndup(str, tmp - str);
1185 if ((*fieldp)->name == NULL)
1188 goodname = (*fieldp)->name;
1189 pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
1190 fieldp = &(*fieldp)->next;
1193 (*fieldp)->name = strdup(str);
1194 if ((*fieldp)->name == NULL)
1197 goodname = (*fieldp)->name;
1198 pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
1200 /* If no name is specified, set the last field name (not array index)*/
1202 arg->name = strdup(goodname);
1203 if (arg->name == NULL)
1209 /* Parse perf-probe event command */
1210 int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
1213 int argc, i, ret = 0;
1215 argv = argv_split(cmd, &argc);
1217 pr_debug("Failed to split arguments.\n");
1220 if (argc - 1 > MAX_PROBE_ARGS) {
1221 semantic_error("Too many probe arguments (%d).\n", argc - 1);
1225 /* Parse probe point */
1226 ret = parse_perf_probe_point(argv[0], pev);
1230 /* Copy arguments and ensure return probe has no C argument */
1231 pev->nargs = argc - 1;
1232 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1233 if (pev->args == NULL) {
1237 for (i = 0; i < pev->nargs && ret >= 0; i++) {
1238 ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
1240 is_c_varname(pev->args[i].var) && pev->point.retprobe) {
1241 semantic_error("You can't specify local variable for"
1252 /* Return true if this perf_probe_event requires debuginfo */
1253 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
1257 if (pev->point.file || pev->point.line || pev->point.lazy_line)
1260 for (i = 0; i < pev->nargs; i++)
1261 if (is_c_varname(pev->args[i].var))
1267 /* Parse probe_events event into struct probe_point */
1268 static int parse_probe_trace_command(const char *cmd,
1269 struct probe_trace_event *tev)
1271 struct probe_trace_point *tp = &tev->point;
1274 char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
1278 pr_debug("Parsing probe_events: %s\n", cmd);
1279 argv = argv_split(cmd, &argc);
1281 pr_debug("Failed to split arguments.\n");
1285 semantic_error("Too few probe arguments.\n");
1290 /* Scan event and group name. */
1291 argv0_str = strdup(argv[0]);
1292 if (argv0_str == NULL) {
1296 fmt1_str = strtok_r(argv0_str, ":", &fmt);
1297 fmt2_str = strtok_r(NULL, "/", &fmt);
1298 fmt3_str = strtok_r(NULL, " \t", &fmt);
1299 if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
1300 || fmt3_str == NULL) {
1301 semantic_error("Failed to parse event name: %s\n", argv[0]);
1306 tev->group = strdup(fmt2_str);
1307 tev->event = strdup(fmt3_str);
1308 if (tev->group == NULL || tev->event == NULL) {
1312 pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
1314 tp->retprobe = (pr == 'r');
1316 /* Scan module name(if there), function name and offset */
1317 p = strchr(argv[1], ':');
1319 tp->module = strndup(argv[1], p - argv[1]);
1323 fmt1_str = strtok_r(p, "+", &fmt);
1324 if (fmt1_str[0] == '0') /* only the address started with 0x */
1325 tp->address = strtoul(fmt1_str, NULL, 0);
1327 /* Only the symbol-based probe has offset */
1328 tp->symbol = strdup(fmt1_str);
1329 if (tp->symbol == NULL) {
1333 fmt2_str = strtok_r(NULL, "", &fmt);
1334 if (fmt2_str == NULL)
1337 tp->offset = strtoul(fmt2_str, NULL, 10);
1340 tev->nargs = argc - 2;
1341 tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
1342 if (tev->args == NULL) {
1346 for (i = 0; i < tev->nargs; i++) {
1347 p = strchr(argv[i + 2], '=');
1348 if (p) /* We don't need which register is assigned. */
1352 tev->args[i].name = strdup(argv[i + 2]);
1353 /* TODO: parse regs and offset */
1354 tev->args[i].value = strdup(p);
1355 if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
1367 /* Compose only probe arg */
1368 int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len)
1370 struct perf_probe_arg_field *field = pa->field;
1374 if (pa->name && pa->var)
1375 ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var);
1377 ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var);
1384 if (field->name[0] == '[')
1385 ret = e_snprintf(tmp, len, "%s", field->name);
1387 ret = e_snprintf(tmp, len, "%s%s",
1388 field->ref ? "->" : ".", field->name);
1393 field = field->next;
1397 ret = e_snprintf(tmp, len, ":%s", pa->type);
1406 pr_debug("Failed to synthesize perf probe argument: %s\n",
1411 /* Compose only probe point (not argument) */
1412 static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
1415 char offs[32] = "", line[32] = "", file[32] = "";
1418 buf = zalloc(MAX_CMDLEN);
1424 ret = e_snprintf(offs, 32, "+%lu", pp->offset);
1429 ret = e_snprintf(line, 32, ":%d", pp->line);
1437 tmp = strchr(pp->file + len - 30, '/');
1438 tmp = tmp ? tmp + 1 : pp->file + len - 30;
1440 ret = e_snprintf(file, 32, "@%s", tmp);
1446 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function,
1447 offs, pp->retprobe ? "%return" : "", line,
1450 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line);
1456 pr_debug("Failed to synthesize perf probe point: %s\n",
1463 char *synthesize_perf_probe_command(struct perf_probe_event *pev)
1468 buf = synthesize_perf_probe_point(&pev->point);
1473 for (i = 0; i < pev->nargs; i++) {
1474 ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
1487 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
1488 char **buf, size_t *buflen,
1493 depth = __synthesize_probe_trace_arg_ref(ref->next, buf,
1499 ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset);
1511 static int synthesize_probe_trace_arg(struct probe_trace_arg *arg,
1512 char *buf, size_t buflen)
1514 struct probe_trace_arg_ref *ref = arg->ref;
1518 /* Argument name or separator */
1520 ret = e_snprintf(buf, buflen, " %s=", arg->name);
1522 ret = e_snprintf(buf, buflen, " ");
1528 /* Special case: @XXX */
1529 if (arg->value[0] == '@' && arg->ref)
1532 /* Dereferencing arguments */
1534 depth = __synthesize_probe_trace_arg_ref(ref, &buf,
1540 /* Print argument value */
1541 if (arg->value[0] == '@' && arg->ref)
1542 ret = e_snprintf(buf, buflen, "%s%+ld", arg->value,
1545 ret = e_snprintf(buf, buflen, "%s", arg->value);
1553 ret = e_snprintf(buf, buflen, ")");
1559 /* Print argument type */
1561 ret = e_snprintf(buf, buflen, ":%s", arg->type);
1570 char *synthesize_probe_trace_command(struct probe_trace_event *tev)
1572 struct probe_trace_point *tp = &tev->point;
1576 buf = zalloc(MAX_CMDLEN);
1580 len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s ", tp->retprobe ? 'r' : 'p',
1581 tev->group, tev->event);
1585 /* Uprobes must have tp->address and tp->module */
1586 if (tev->uprobes && (!tp->address || !tp->module))
1589 /* Use the tp->address for uprobes */
1591 ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s:0x%lx",
1592 tp->module, tp->address);
1594 ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s%s%s+%lu",
1595 tp->module ?: "", tp->module ? ":" : "",
1596 tp->symbol, tp->offset);
1602 for (i = 0; i < tev->nargs; i++) {
1603 ret = synthesize_probe_trace_arg(&tev->args[i], buf + len,
1616 static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
1617 struct perf_probe_point *pp,
1620 struct symbol *sym = NULL;
1626 map = dso__new_map(tp->module);
1630 sym = map__find_symbol(map, addr, NULL);
1632 addr = kernel_get_symbol_address_by_name(tp->symbol, true);
1635 sym = __find_kernel_function(addr, &map);
1641 pp->retprobe = tp->retprobe;
1642 pp->offset = addr - map->unmap_ip(map, sym->start);
1643 pp->function = strdup(sym->name);
1644 ret = pp->function ? 0 : -ENOMEM;
1647 if (map && !is_kprobe) {
1648 dso__delete(map->dso);
1655 static int convert_to_perf_probe_point(struct probe_trace_point *tp,
1656 struct perf_probe_point *pp,
1662 ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe);
1665 ret = find_perf_probe_point_from_map(tp, pp, is_kprobe);
1669 pr_debug("Failed to find probe point from both of dwarf and map.\n");
1672 pp->function = strdup(tp->symbol);
1673 pp->offset = tp->offset;
1674 } else if (!tp->module && !is_kprobe) {
1675 ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address);
1678 pp->function = strdup(buf);
1681 if (pp->function == NULL)
1684 pp->retprobe = tp->retprobe;
1689 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
1690 struct perf_probe_event *pev, bool is_kprobe)
1695 /* Convert event/group name */
1696 pev->event = strdup(tev->event);
1697 pev->group = strdup(tev->group);
1698 if (pev->event == NULL || pev->group == NULL)
1701 /* Convert trace_point to probe_point */
1702 ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe);
1706 /* Convert trace_arg to probe_arg */
1707 pev->nargs = tev->nargs;
1708 pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
1709 if (pev->args == NULL)
1711 for (i = 0; i < tev->nargs && ret >= 0; i++) {
1712 if (tev->args[i].name)
1713 pev->args[i].name = strdup(tev->args[i].name);
1715 ret = synthesize_probe_trace_arg(&tev->args[i],
1717 pev->args[i].name = strdup(buf);
1719 if (pev->args[i].name == NULL && ret >= 0)
1724 clear_perf_probe_event(pev);
1729 void clear_perf_probe_event(struct perf_probe_event *pev)
1731 struct perf_probe_point *pp = &pev->point;
1732 struct perf_probe_arg_field *field, *next;
1739 free(pp->lazy_line);
1741 for (i = 0; i < pev->nargs; i++) {
1742 free(pev->args[i].name);
1743 free(pev->args[i].var);
1744 free(pev->args[i].type);
1745 field = pev->args[i].field;
1748 zfree(&field->name);
1754 memset(pev, 0, sizeof(*pev));
1757 static void clear_probe_trace_event(struct probe_trace_event *tev)
1759 struct probe_trace_arg_ref *ref, *next;
1764 free(tev->point.symbol);
1765 free(tev->point.module);
1766 for (i = 0; i < tev->nargs; i++) {
1767 free(tev->args[i].name);
1768 free(tev->args[i].value);
1769 free(tev->args[i].type);
1770 ref = tev->args[i].ref;
1778 memset(tev, 0, sizeof(*tev));
1781 static void print_warn_msg(const char *file, bool is_kprobe)
1784 if (errno == ENOENT) {
1788 config = "CONFIG_UPROBE_EVENTS";
1790 config = "CONFIG_KPROBE_EVENTS";
1792 pr_warning("%s file does not exist - please rebuild kernel"
1793 " with %s.\n", file, config);
1795 pr_warning("Failed to open %s file: %s\n", file,
1799 static int open_probe_events(const char *trace_file, bool readwrite,
1803 const char *__debugfs;
1806 __debugfs = debugfs_find_mountpoint();
1807 if (__debugfs == NULL) {
1808 pr_warning("Debugfs is not mounted.\n");
1812 ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file);
1814 pr_debug("Opening %s write=%d\n", buf, readwrite);
1815 if (readwrite && !probe_event_dry_run)
1816 ret = open(buf, O_RDWR, O_APPEND);
1818 ret = open(buf, O_RDONLY, 0);
1821 print_warn_msg(buf, is_kprobe);
1826 static int open_kprobe_events(bool readwrite)
1828 return open_probe_events("tracing/kprobe_events", readwrite, true);
1831 static int open_uprobe_events(bool readwrite)
1833 return open_probe_events("tracing/uprobe_events", readwrite, false);
1836 /* Get raw string list of current kprobe_events or uprobe_events */
1837 static struct strlist *get_probe_trace_command_rawlist(int fd)
1841 char buf[MAX_CMDLEN];
1845 sl = strlist__new(true, NULL);
1847 fp = fdopen(dup(fd), "r");
1849 p = fgets(buf, MAX_CMDLEN, fp);
1853 idx = strlen(p) - 1;
1856 ret = strlist__add(sl, buf);
1858 pr_debug("strlist__add failed: %s\n", strerror(-ret));
1859 strlist__delete(sl);
1869 static int show_perf_probe_event(struct perf_probe_event *pev,
1876 /* Synthesize only event probe point */
1877 place = synthesize_perf_probe_point(&pev->point);
1881 ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event);
1885 printf(" %-20s (on %s", buf, place);
1887 printf(" in %s", module);
1889 if (pev->nargs > 0) {
1891 for (i = 0; i < pev->nargs; i++) {
1892 ret = synthesize_perf_probe_arg(&pev->args[i],
1904 static int __show_perf_probe_events(int fd, bool is_kprobe)
1907 struct probe_trace_event tev;
1908 struct perf_probe_event pev;
1909 struct strlist *rawlist;
1910 struct str_node *ent;
1912 memset(&tev, 0, sizeof(tev));
1913 memset(&pev, 0, sizeof(pev));
1915 rawlist = get_probe_trace_command_rawlist(fd);
1919 strlist__for_each(ent, rawlist) {
1920 ret = parse_probe_trace_command(ent->s, &tev);
1922 ret = convert_to_perf_probe_event(&tev, &pev,
1925 ret = show_perf_probe_event(&pev,
1928 clear_perf_probe_event(&pev);
1929 clear_probe_trace_event(&tev);
1933 strlist__delete(rawlist);
1938 /* List up current perf-probe events */
1939 int show_perf_probe_events(void)
1944 fd = open_kprobe_events(false);
1949 ret = init_symbol_maps(false);
1953 ret = __show_perf_probe_events(fd, true);
1956 fd = open_uprobe_events(false);
1958 ret = __show_perf_probe_events(fd, false);
1966 /* Get current perf-probe event names */
1967 static struct strlist *get_probe_trace_event_names(int fd, bool include_group)
1970 struct strlist *sl, *rawlist;
1971 struct str_node *ent;
1972 struct probe_trace_event tev;
1975 memset(&tev, 0, sizeof(tev));
1976 rawlist = get_probe_trace_command_rawlist(fd);
1977 sl = strlist__new(true, NULL);
1978 strlist__for_each(ent, rawlist) {
1979 ret = parse_probe_trace_command(ent->s, &tev);
1982 if (include_group) {
1983 ret = e_snprintf(buf, 128, "%s:%s", tev.group,
1986 ret = strlist__add(sl, buf);
1988 ret = strlist__add(sl, tev.event);
1989 clear_probe_trace_event(&tev);
1993 strlist__delete(rawlist);
1996 strlist__delete(sl);
2002 static int write_probe_trace_event(int fd, struct probe_trace_event *tev)
2005 char *buf = synthesize_probe_trace_command(tev);
2008 pr_debug("Failed to synthesize probe trace event.\n");
2012 pr_debug("Writing event: %s\n", buf);
2013 if (!probe_event_dry_run) {
2014 ret = write(fd, buf, strlen(buf));
2016 pr_warning("Failed to write event: %s\n",
2023 static int get_new_event_name(char *buf, size_t len, const char *base,
2024 struct strlist *namelist, bool allow_suffix)
2029 ret = e_snprintf(buf, len, "%s", base);
2031 pr_debug("snprintf() failed: %s\n", strerror(-ret));
2034 if (!strlist__has_entry(namelist, buf))
2037 if (!allow_suffix) {
2038 pr_warning("Error: event \"%s\" already exists. "
2039 "(Use -f to force duplicates.)\n", base);
2043 /* Try to add suffix */
2044 for (i = 1; i < MAX_EVENT_INDEX; i++) {
2045 ret = e_snprintf(buf, len, "%s_%d", base, i);
2047 pr_debug("snprintf() failed: %s\n", strerror(-ret));
2050 if (!strlist__has_entry(namelist, buf))
2053 if (i == MAX_EVENT_INDEX) {
2054 pr_warning("Too many events are on the same function.\n");
2061 static int __add_probe_trace_events(struct perf_probe_event *pev,
2062 struct probe_trace_event *tevs,
2063 int ntevs, bool allow_suffix)
2066 struct probe_trace_event *tev = NULL;
2068 const char *event, *group;
2069 struct strlist *namelist;
2072 fd = open_uprobe_events(true);
2074 fd = open_kprobe_events(true);
2078 /* Get current event names */
2079 namelist = get_probe_trace_event_names(fd, false);
2081 pr_debug("Failed to get current event list.\n");
2086 printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":");
2087 for (i = 0; i < ntevs; i++) {
2092 if (pev->point.function)
2093 event = pev->point.function;
2095 event = tev->point.symbol;
2099 group = PERFPROBE_GROUP;
2101 /* Get an unused new event name */
2102 ret = get_new_event_name(buf, 64, event,
2103 namelist, allow_suffix);
2108 tev->event = strdup(event);
2109 tev->group = strdup(group);
2110 if (tev->event == NULL || tev->group == NULL) {
2114 ret = write_probe_trace_event(fd, tev);
2117 /* Add added event name to namelist */
2118 strlist__add(namelist, event);
2120 /* Trick here - save current event/group */
2123 pev->event = tev->event;
2124 pev->group = tev->group;
2125 show_perf_probe_event(pev, tev->point.module);
2126 /* Trick here - restore current event/group */
2127 pev->event = (char *)event;
2128 pev->group = (char *)group;
2131 * Probes after the first probe which comes from same
2132 * user input are always allowed to add suffix, because
2133 * there might be several addresses corresponding to
2136 allow_suffix = true;
2140 /* Show how to use the event. */
2141 printf("\nYou can now use it in all perf tools, such as:\n\n");
2142 printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group,
2146 strlist__delete(namelist);
2151 static char *looking_function_name;
2152 static int num_matched_functions;
2154 static int probe_function_filter(struct map *map __maybe_unused,
2157 if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) &&
2158 strcmp(looking_function_name, sym->name) == 0) {
2159 num_matched_functions++;
2165 #define strdup_or_goto(str, label) \
2166 ({ char *__p = strdup(str); if (!__p) goto label; __p; })
2169 * Find probe function addresses from map.
2170 * Return an error or the number of found probe_trace_event
2172 static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
2173 struct probe_trace_event **tevs,
2174 int max_tevs, const char *target)
2176 struct map *map = NULL;
2177 struct kmap *kmap = NULL;
2178 struct ref_reloc_sym *reloc_sym = NULL;
2181 struct probe_trace_event *tev;
2182 struct perf_probe_point *pp = &pev->point;
2183 struct probe_trace_point *tp;
2186 /* Init maps of given executable or kernel */
2188 map = dso__new_map(target);
2190 map = kernel_get_module_map(target);
2197 * Load matched symbols: Since the different local symbols may have
2198 * same name but different addresses, this lists all the symbols.
2200 num_matched_functions = 0;
2201 looking_function_name = pp->function;
2202 ret = map__load(map, probe_function_filter);
2203 if (ret || num_matched_functions == 0) {
2204 pr_err("Failed to find symbol %s in %s\n", pp->function,
2205 target ? : "kernel");
2208 } else if (num_matched_functions > max_tevs) {
2209 pr_err("Too many functions matched in %s\n",
2210 target ? : "kernel");
2215 if (!pev->uprobes) {
2216 kmap = map__kmap(map);
2217 reloc_sym = kmap->ref_reloc_sym;
2219 pr_warning("Relocated base symbol is not found!\n");
2225 /* Setup result trace-probe-events */
2226 *tevs = zalloc(sizeof(*tev) * num_matched_functions);
2233 map__for_each_symbol(map, sym, nd) {
2234 tev = (*tevs) + ret;
2236 if (ret == num_matched_functions) {
2237 pr_warning("Too many symbols are listed. Skip it.\n");
2242 if (pp->offset > sym->end - sym->start) {
2243 pr_warning("Offset %ld is bigger than the size of %s\n",
2244 pp->offset, sym->name);
2248 /* Add one probe point */
2249 tp->address = map->unmap_ip(map, sym->start) + pp->offset;
2251 tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out);
2252 tp->offset = tp->address - reloc_sym->addr;
2254 tp->symbol = strdup_or_goto(sym->name, nomem_out);
2255 tp->offset = pp->offset;
2257 tp->retprobe = pp->retprobe;
2259 tev->point.module = strdup_or_goto(target, nomem_out);
2260 tev->uprobes = pev->uprobes;
2261 tev->nargs = pev->nargs;
2263 tev->args = zalloc(sizeof(struct probe_trace_arg) *
2265 if (tev->args == NULL)
2268 for (i = 0; i < tev->nargs; i++) {
2269 if (pev->args[i].name)
2271 strdup_or_goto(pev->args[i].name,
2274 tev->args[i].value = strdup_or_goto(pev->args[i].var,
2276 if (pev->args[i].type)
2278 strdup_or_goto(pev->args[i].type,
2284 if (map && pev->uprobes) {
2285 /* Only when using uprobe(exec) map needs to be released */
2286 dso__delete(map->dso);
2294 clear_probe_trace_events(*tevs, num_matched_functions);
2299 static int convert_to_probe_trace_events(struct perf_probe_event *pev,
2300 struct probe_trace_event **tevs,
2301 int max_tevs, const char *target)
2305 if (pev->uprobes && !pev->group) {
2306 /* Replace group name if not given */
2307 ret = convert_exec_to_group(target, &pev->group);
2309 pr_warning("Failed to make a group name.\n");
2314 /* Convert perf_probe_event with debuginfo */
2315 ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target);
2317 return ret; /* Found in debuginfo or got an error */
2319 return find_probe_trace_events_from_map(pev, tevs, max_tevs, target);
2322 struct __event_package {
2323 struct perf_probe_event *pev;
2324 struct probe_trace_event *tevs;
2328 int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
2329 int max_tevs, const char *target, bool force_add)
2332 struct __event_package *pkgs;
2335 pkgs = zalloc(sizeof(struct __event_package) * npevs);
2340 ret = init_symbol_maps(pevs->uprobes);
2346 /* Loop 1: convert all events */
2347 for (i = 0; i < npevs; i++) {
2348 pkgs[i].pev = &pevs[i];
2349 /* Convert with or without debuginfo */
2350 ret = convert_to_probe_trace_events(pkgs[i].pev,
2356 pkgs[i].ntevs = ret;
2359 /* Loop 2: add all events */
2360 for (i = 0; i < npevs; i++) {
2361 ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs,
2362 pkgs[i].ntevs, force_add);
2367 /* Loop 3: cleanup and free trace events */
2368 for (i = 0; i < npevs; i++) {
2369 for (j = 0; j < pkgs[i].ntevs; j++)
2370 clear_probe_trace_event(&pkgs[i].tevs[j]);
2371 zfree(&pkgs[i].tevs);
2379 static int __del_trace_probe_event(int fd, struct str_node *ent)
2385 /* Convert from perf-probe event to trace-probe event */
2386 ret = e_snprintf(buf, 128, "-:%s", ent->s);
2390 p = strchr(buf + 2, ':');
2392 pr_debug("Internal error: %s should have ':' but not.\n",
2399 pr_debug("Writing event: %s\n", buf);
2400 ret = write(fd, buf, strlen(buf));
2406 printf("Removed event: %s\n", ent->s);
2409 pr_warning("Failed to delete event: %s\n", strerror(-ret));
2413 static int del_trace_probe_event(int fd, const char *buf,
2414 struct strlist *namelist)
2416 struct str_node *ent, *n;
2419 if (strpbrk(buf, "*?")) { /* Glob-exp */
2420 strlist__for_each_safe(ent, n, namelist)
2421 if (strglobmatch(ent->s, buf)) {
2422 ret = __del_trace_probe_event(fd, ent);
2425 strlist__remove(namelist, ent);
2428 ent = strlist__find(namelist, buf);
2430 ret = __del_trace_probe_event(fd, ent);
2432 strlist__remove(namelist, ent);
2439 int del_perf_probe_events(struct strlist *dellist)
2441 int ret = -1, ufd = -1, kfd = -1;
2443 const char *group, *event;
2445 struct str_node *ent;
2446 struct strlist *namelist = NULL, *unamelist = NULL;
2448 /* Get current event names */
2449 kfd = open_kprobe_events(true);
2453 namelist = get_probe_trace_event_names(kfd, true);
2454 ufd = open_uprobe_events(true);
2457 unamelist = get_probe_trace_event_names(ufd, true);
2459 if (namelist == NULL && unamelist == NULL)
2462 strlist__for_each(ent, dellist) {
2463 str = strdup(ent->s);
2468 pr_debug("Parsing: %s\n", str);
2469 p = strchr(str, ':');
2479 ret = e_snprintf(buf, 128, "%s:%s", group, event);
2481 pr_err("Failed to copy event.");
2486 pr_debug("Group: %s, Event: %s\n", group, event);
2489 ret = del_trace_probe_event(kfd, buf, namelist);
2491 if (unamelist && ret != 0)
2492 ret = del_trace_probe_event(ufd, buf, unamelist);
2495 pr_info("Info: Event \"%s\" does not exist.\n", buf);
2502 strlist__delete(namelist);
2507 strlist__delete(unamelist);
2514 /* TODO: don't use a global variable for filter ... */
2515 static struct strfilter *available_func_filter;
2518 * If a symbol corresponds to a function with global binding and
2519 * matches filter return 0. For all others return 1.
2521 static int filter_available_functions(struct map *map __maybe_unused,
2524 if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) &&
2525 strfilter__compare(available_func_filter, sym->name))
2530 int show_available_funcs(const char *target, struct strfilter *_filter,
2536 ret = init_symbol_maps(user);
2540 /* Get a symbol map */
2542 map = dso__new_map(target);
2544 map = kernel_get_module_map(target);
2546 pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
2550 /* Load symbols with given filter */
2551 available_func_filter = _filter;
2552 if (map__load(map, filter_available_functions)) {
2553 pr_err("Failed to load symbols in %s\n", (target) ? : "kernel");
2556 if (!dso__sorted_by_name(map->dso, map->type))
2557 dso__sort_by_name(map->dso, map->type);
2559 /* Show all (filtered) symbols */
2561 dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
2564 dso__delete(map->dso);