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/fs.h>
44 #include "trace-event.h" /* For __maybe_unused */
45 #include "probe-event.h"
46 #include "probe-finder.h"
47 #include "probe-file.h"
50 #define MAX_CMDLEN 256
51 #define PERFPROBE_GROUP "probe"
53 bool probe_event_dry_run
; /* Dry run flag */
54 struct probe_conf probe_conf
;
56 #define semantic_error(msg ...) pr_err("Semantic error :" msg)
58 int e_snprintf(char *str
, size_t size
, const char *format
, ...)
63 ret
= vsnprintf(str
, size
, format
, ap
);
70 static char *synthesize_perf_probe_point(struct perf_probe_point
*pp
);
71 static struct machine
*host_machine
;
73 /* Initialize symbol maps and path of vmlinux/modules */
74 int init_probe_symbol_maps(bool user_only
)
78 symbol_conf
.sort_by_name
= true;
79 symbol_conf
.allow_aliases
= true;
80 ret
= symbol__init(NULL
);
82 pr_debug("Failed to init symbol map.\n");
86 if (host_machine
|| user_only
) /* already initialized */
89 if (symbol_conf
.vmlinux_name
)
90 pr_debug("Use vmlinux: %s\n", symbol_conf
.vmlinux_name
);
92 host_machine
= machine__new_host();
94 pr_debug("machine__new_host() failed.\n");
100 pr_warning("Failed to init vmlinux path.\n");
104 void exit_probe_symbol_maps(void)
107 machine__delete(host_machine
);
113 static struct symbol
*__find_kernel_function_by_name(const char *name
,
116 return machine__find_kernel_function_by_name(host_machine
, name
, mapp
,
120 static struct symbol
*__find_kernel_function(u64 addr
, struct map
**mapp
)
122 return machine__find_kernel_function(host_machine
, addr
, mapp
, NULL
);
125 static struct ref_reloc_sym
*kernel_get_ref_reloc_sym(void)
127 /* kmap->ref_reloc_sym should be set if host_machine is initialized */
129 struct map
*map
= machine__kernel_map(host_machine
);
131 if (map__load(map
, NULL
) < 0)
134 kmap
= map__kmap(map
);
137 return kmap
->ref_reloc_sym
;
140 static int kernel_get_symbol_address_by_name(const char *name
, u64
*addr
,
141 bool reloc
, bool reladdr
)
143 struct ref_reloc_sym
*reloc_sym
;
147 /* ref_reloc_sym is just a label. Need a special fix*/
148 reloc_sym
= kernel_get_ref_reloc_sym();
149 if (reloc_sym
&& strcmp(name
, reloc_sym
->name
) == 0)
150 *addr
= (reloc
) ? reloc_sym
->addr
: reloc_sym
->unrelocated_addr
;
152 sym
= __find_kernel_function_by_name(name
, &map
);
155 *addr
= map
->unmap_ip(map
, sym
->start
) -
156 ((reloc
) ? 0 : map
->reloc
) -
157 ((reladdr
) ? map
->start
: 0);
162 static struct map
*kernel_get_module_map(const char *module
)
164 struct map_groups
*grp
= &host_machine
->kmaps
;
165 struct maps
*maps
= &grp
->maps
[MAP__FUNCTION
];
168 /* A file path -- this is an offline module */
169 if (module
&& strchr(module
, '/'))
170 return machine__findnew_module_map(host_machine
, 0, module
);
175 for (pos
= maps__first(maps
); pos
; pos
= map__next(pos
)) {
176 if (strncmp(pos
->dso
->short_name
+ 1, module
,
177 pos
->dso
->short_name_len
- 2) == 0) {
184 static struct map
*get_target_map(const char *target
, bool user
)
186 /* Init maps of given executable or kernel */
188 return dso__new_map(target
);
190 return kernel_get_module_map(target
);
193 static void put_target_map(struct map
*map
, bool user
)
196 /* Only the user map needs to be released */
202 static int convert_exec_to_group(const char *exec
, char **result
)
204 char *ptr1
, *ptr2
, *exec_copy
;
208 exec_copy
= strdup(exec
);
212 ptr1
= basename(exec_copy
);
218 ptr2
= strpbrk(ptr1
, "-._");
221 ret
= e_snprintf(buf
, 64, "%s_%s", PERFPROBE_GROUP
, ptr1
);
225 *result
= strdup(buf
);
226 ret
= *result
? 0 : -ENOMEM
;
233 static void clear_perf_probe_point(struct perf_probe_point
*pp
)
240 static void clear_probe_trace_events(struct probe_trace_event
*tevs
, int ntevs
)
244 for (i
= 0; i
< ntevs
; i
++)
245 clear_probe_trace_event(tevs
+ i
);
248 static bool kprobe_blacklist__listed(unsigned long address
);
249 static bool kprobe_warn_out_range(const char *symbol
, unsigned long address
)
254 /* Get the address of _etext for checking non-probable text symbol */
255 ret
= kernel_get_symbol_address_by_name("_etext", &etext_addr
,
258 if (ret
== 0 && etext_addr
< address
)
259 pr_warning("%s is out of .text, skip it.\n", symbol
);
260 else if (kprobe_blacklist__listed(address
))
261 pr_warning("%s is blacklisted function, skip it.\n", symbol
);
270 * '.gnu.linkonce.this_module' section of kernel module elf directly
271 * maps to 'struct module' from linux/module.h. This section contains
272 * actual module name which will be used by kernel after loading it.
273 * But, we cannot use 'struct module' here since linux/module.h is not
274 * exposed to user-space. Offset of 'name' has remained same from long
275 * time, so hardcoding it here.
278 #define MOD_NAME_OFFSET 24
280 #define MOD_NAME_OFFSET 12
284 * @module can be module name of module file path. In case of path,
285 * inspect elf and find out what is actual module name.
286 * Caller has to free mod_name after using it.
288 static char *find_module_name(const char *module
)
296 char *mod_name
= NULL
;
298 fd
= open(module
, O_RDONLY
);
302 elf
= elf_begin(fd
, PERF_ELF_C_READ_MMAP
, NULL
);
306 if (gelf_getehdr(elf
, &ehdr
) == NULL
)
309 sec
= elf_section_by_name(elf
, &ehdr
, &shdr
,
310 ".gnu.linkonce.this_module", NULL
);
314 data
= elf_getdata(sec
, NULL
);
315 if (!data
|| !data
->d_buf
)
318 mod_name
= strdup((char *)data
->d_buf
+ MOD_NAME_OFFSET
);
327 #ifdef HAVE_DWARF_SUPPORT
329 static int kernel_get_module_dso(const char *module
, struct dso
**pdso
)
333 const char *vmlinux_name
;
337 char module_name
[128];
339 snprintf(module_name
, sizeof(module_name
), "[%s]", module
);
340 map
= map_groups__find_by_name(&host_machine
->kmaps
, MAP__FUNCTION
, module_name
);
345 pr_debug("Failed to find module %s.\n", module
);
349 map
= machine__kernel_map(host_machine
);
352 vmlinux_name
= symbol_conf
.vmlinux_name
;
355 ret
= dso__load_vmlinux(dso
, map
, vmlinux_name
, false, NULL
);
357 ret
= dso__load_vmlinux_path(dso
, map
, NULL
);
364 * Some binaries like glibc have special symbols which are on the symbol
365 * table, but not in the debuginfo. If we can find the address of the
366 * symbol from map, we can translate the address back to the probe point.
368 static int find_alternative_probe_point(struct debuginfo
*dinfo
,
369 struct perf_probe_point
*pp
,
370 struct perf_probe_point
*result
,
371 const char *target
, bool uprobes
)
373 struct map
*map
= NULL
;
378 /* This can work only for function-name based one */
379 if (!pp
->function
|| pp
->file
)
382 map
= get_target_map(target
, uprobes
);
386 /* Find the address of given function */
387 map__for_each_symbol_by_name(map
, pp
->function
, sym
) {
389 address
= sym
->start
;
391 address
= map
->unmap_ip(map
, sym
->start
);
398 pr_debug("Symbol %s address found : %" PRIx64
"\n",
399 pp
->function
, address
);
401 ret
= debuginfo__find_probe_point(dinfo
, (unsigned long)address
,
404 ret
= (!ret
) ? -ENOENT
: ret
;
406 result
->offset
+= pp
->offset
;
407 result
->line
+= pp
->line
;
408 result
->retprobe
= pp
->retprobe
;
413 put_target_map(map
, uprobes
);
418 static int get_alternative_probe_event(struct debuginfo
*dinfo
,
419 struct perf_probe_event
*pev
,
420 struct perf_probe_point
*tmp
)
424 memcpy(tmp
, &pev
->point
, sizeof(*tmp
));
425 memset(&pev
->point
, 0, sizeof(pev
->point
));
426 ret
= find_alternative_probe_point(dinfo
, tmp
, &pev
->point
,
427 pev
->target
, pev
->uprobes
);
429 memcpy(&pev
->point
, tmp
, sizeof(*tmp
));
434 static int get_alternative_line_range(struct debuginfo
*dinfo
,
435 struct line_range
*lr
,
436 const char *target
, bool user
)
438 struct perf_probe_point pp
= { .function
= lr
->function
,
441 struct perf_probe_point result
;
444 memset(&result
, 0, sizeof(result
));
446 if (lr
->end
!= INT_MAX
)
447 len
= lr
->end
- lr
->start
;
448 ret
= find_alternative_probe_point(dinfo
, &pp
, &result
,
451 lr
->function
= result
.function
;
452 lr
->file
= result
.file
;
453 lr
->start
= result
.line
;
454 if (lr
->end
!= INT_MAX
)
455 lr
->end
= lr
->start
+ len
;
456 clear_perf_probe_point(&pp
);
461 /* Open new debuginfo of given module */
462 static struct debuginfo
*open_debuginfo(const char *module
, bool silent
)
464 const char *path
= module
;
465 char reason
[STRERR_BUFSIZE
];
466 struct debuginfo
*ret
= NULL
;
467 struct dso
*dso
= NULL
;
470 if (!module
|| !strchr(module
, '/')) {
471 err
= kernel_get_module_dso(module
, &dso
);
473 if (!dso
|| dso
->load_errno
== 0) {
474 if (!strerror_r(-err
, reason
, STRERR_BUFSIZE
))
475 strcpy(reason
, "(unknown)");
477 dso__strerror_load(dso
, reason
, STRERR_BUFSIZE
);
479 pr_err("Failed to find the path for %s: %s\n",
480 module
?: "kernel", reason
);
483 path
= dso
->long_name
;
485 ret
= debuginfo__new(path
);
486 if (!ret
&& !silent
) {
487 pr_warning("The %s file has no debug information.\n", path
);
488 if (!module
|| !strtailcmp(path
, ".ko"))
489 pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, ");
491 pr_warning("Rebuild with -g, ");
492 pr_warning("or install an appropriate debuginfo package.\n");
497 /* For caching the last debuginfo */
498 static struct debuginfo
*debuginfo_cache
;
499 static char *debuginfo_cache_path
;
501 static struct debuginfo
*debuginfo_cache__open(const char *module
, bool silent
)
503 const char *path
= module
;
505 /* If the module is NULL, it should be the kernel. */
509 if (debuginfo_cache_path
&& !strcmp(debuginfo_cache_path
, path
))
512 /* Copy module path */
513 free(debuginfo_cache_path
);
514 debuginfo_cache_path
= strdup(path
);
515 if (!debuginfo_cache_path
) {
516 debuginfo__delete(debuginfo_cache
);
517 debuginfo_cache
= NULL
;
521 debuginfo_cache
= open_debuginfo(module
, silent
);
522 if (!debuginfo_cache
)
523 zfree(&debuginfo_cache_path
);
525 return debuginfo_cache
;
528 static void debuginfo_cache__exit(void)
530 debuginfo__delete(debuginfo_cache
);
531 debuginfo_cache
= NULL
;
532 zfree(&debuginfo_cache_path
);
536 static int get_text_start_address(const char *exec
, unsigned long *address
)
541 int fd
, ret
= -ENOENT
;
543 fd
= open(exec
, O_RDONLY
);
547 elf
= elf_begin(fd
, PERF_ELF_C_READ_MMAP
, NULL
);
553 if (gelf_getehdr(elf
, &ehdr
) == NULL
)
556 if (!elf_section_by_name(elf
, &ehdr
, &shdr
, ".text", NULL
))
559 *address
= shdr
.sh_addr
- shdr
.sh_offset
;
570 * Convert trace point to probe point with debuginfo
572 static int find_perf_probe_point_from_dwarf(struct probe_trace_point
*tp
,
573 struct perf_probe_point
*pp
,
576 struct debuginfo
*dinfo
= NULL
;
577 unsigned long stext
= 0;
578 u64 addr
= tp
->address
;
581 /* convert the address to dwarf address */
587 ret
= get_text_start_address(tp
->module
, &stext
);
591 } else if (tp
->symbol
) {
592 /* If the module is given, this returns relative address */
593 ret
= kernel_get_symbol_address_by_name(tp
->symbol
, &addr
,
594 false, !!tp
->module
);
600 pr_debug("try to find information at %" PRIx64
" in %s\n", addr
,
601 tp
->module
? : "kernel");
603 dinfo
= debuginfo_cache__open(tp
->module
, verbose
== 0);
605 ret
= debuginfo__find_probe_point(dinfo
,
606 (unsigned long)addr
, pp
);
611 pp
->retprobe
= tp
->retprobe
;
615 pr_debug("Failed to find corresponding probes from debuginfo.\n");
616 return ret
? : -ENOENT
;
619 static int add_exec_to_probe_trace_events(struct probe_trace_event
*tevs
,
620 int ntevs
, const char *exec
)
623 unsigned long stext
= 0;
628 ret
= get_text_start_address(exec
, &stext
);
632 for (i
= 0; i
< ntevs
&& ret
>= 0; i
++) {
633 /* point.address is the addres of point.symbol + point.offset */
634 tevs
[i
].point
.address
-= stext
;
635 tevs
[i
].point
.module
= strdup(exec
);
636 if (!tevs
[i
].point
.module
) {
640 tevs
[i
].uprobes
= true;
646 static int add_module_to_probe_trace_events(struct probe_trace_event
*tevs
,
647 int ntevs
, const char *module
)
650 char *mod_name
= NULL
;
655 mod_name
= find_module_name(module
);
657 for (i
= 0; i
< ntevs
; i
++) {
658 tevs
[i
].point
.module
=
659 strdup(mod_name
? mod_name
: module
);
660 if (!tevs
[i
].point
.module
) {
670 /* Post processing the probe events */
671 static int post_process_probe_trace_events(struct probe_trace_event
*tevs
,
672 int ntevs
, const char *module
,
675 struct ref_reloc_sym
*reloc_sym
;
680 return add_exec_to_probe_trace_events(tevs
, ntevs
, module
);
682 /* Note that currently ref_reloc_sym based probe is not for drivers */
684 return add_module_to_probe_trace_events(tevs
, ntevs
, module
);
686 reloc_sym
= kernel_get_ref_reloc_sym();
688 pr_warning("Relocated base symbol is not found!\n");
692 for (i
= 0; i
< ntevs
; i
++) {
693 if (!tevs
[i
].point
.address
|| tevs
[i
].point
.retprobe
)
695 /* If we found a wrong one, mark it by NULL symbol */
696 if (kprobe_warn_out_range(tevs
[i
].point
.symbol
,
697 tevs
[i
].point
.address
)) {
701 tmp
= strdup(reloc_sym
->name
);
705 /* If we have no realname, use symbol for it */
706 if (!tevs
[i
].point
.realname
)
707 tevs
[i
].point
.realname
= tevs
[i
].point
.symbol
;
709 free(tevs
[i
].point
.symbol
);
710 tevs
[i
].point
.symbol
= tmp
;
711 tevs
[i
].point
.offset
= tevs
[i
].point
.address
-
712 reloc_sym
->unrelocated_addr
;
717 /* Try to find perf_probe_event with debuginfo */
718 static int try_to_find_probe_trace_events(struct perf_probe_event
*pev
,
719 struct probe_trace_event
**tevs
)
721 bool need_dwarf
= perf_probe_event_need_dwarf(pev
);
722 struct perf_probe_point tmp
;
723 struct debuginfo
*dinfo
;
726 dinfo
= open_debuginfo(pev
->target
, !need_dwarf
);
730 pr_debug("Could not open debuginfo. Try to use symbols.\n");
734 pr_debug("Try to find probe point from debuginfo.\n");
735 /* Searching trace events corresponding to a probe event */
736 ntevs
= debuginfo__find_trace_events(dinfo
, pev
, tevs
);
738 if (ntevs
== 0) { /* Not found, retry with an alternative */
739 ret
= get_alternative_probe_event(dinfo
, pev
, &tmp
);
741 ntevs
= debuginfo__find_trace_events(dinfo
, pev
, tevs
);
743 * Write back to the original probe_event for
744 * setting appropriate (user given) event name
746 clear_perf_probe_point(&pev
->point
);
747 memcpy(&pev
->point
, &tmp
, sizeof(tmp
));
751 debuginfo__delete(dinfo
);
753 if (ntevs
> 0) { /* Succeeded to find trace events */
754 pr_debug("Found %d probe_trace_events.\n", ntevs
);
755 ret
= post_process_probe_trace_events(*tevs
, ntevs
,
756 pev
->target
, pev
->uprobes
);
757 if (ret
< 0 || ret
== ntevs
) {
758 clear_probe_trace_events(*tevs
, ntevs
);
762 return ret
< 0 ? ret
: ntevs
;
767 if (ntevs
== 0) { /* No error but failed to find probe point. */
768 pr_warning("Probe point '%s' not found.\n",
769 synthesize_perf_probe_point(&pev
->point
));
772 /* Error path : ntevs < 0 */
773 pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs
);
776 pr_warning("Warning: No dwarf info found in the vmlinux - "
777 "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n");
779 pr_debug("Trying to use symbols.\n");
786 #define LINEBUF_SIZE 256
787 #define NR_ADDITIONAL_LINES 2
789 static int __show_one_line(FILE *fp
, int l
, bool skip
, bool show_num
)
791 char buf
[LINEBUF_SIZE
], sbuf
[STRERR_BUFSIZE
];
792 const char *color
= show_num
? "" : PERF_COLOR_BLUE
;
793 const char *prefix
= NULL
;
796 if (fgets(buf
, LINEBUF_SIZE
, fp
) == NULL
)
801 prefix
= show_num
? "%7d " : " ";
802 color_fprintf(stdout
, color
, prefix
, l
);
804 color_fprintf(stdout
, color
, "%s", buf
);
806 } while (strchr(buf
, '\n') == NULL
);
811 pr_warning("File read error: %s\n",
812 strerror_r(errno
, sbuf
, sizeof(sbuf
)));
818 static int _show_one_line(FILE *fp
, int l
, bool skip
, bool show_num
)
820 int rv
= __show_one_line(fp
, l
, skip
, show_num
);
822 pr_warning("Source file is shorter than expected.\n");
828 #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
829 #define show_one_line(f,l) _show_one_line(f,l,false,false)
830 #define skip_one_line(f,l) _show_one_line(f,l,true,false)
831 #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
834 * Show line-range always requires debuginfo to find source file and
837 static int __show_line_range(struct line_range
*lr
, const char *module
,
842 struct debuginfo
*dinfo
;
846 char sbuf
[STRERR_BUFSIZE
];
848 /* Search a line range */
849 dinfo
= open_debuginfo(module
, false);
853 ret
= debuginfo__find_line_range(dinfo
, lr
);
854 if (!ret
) { /* Not found, retry with an alternative */
855 ret
= get_alternative_line_range(dinfo
, lr
, module
, user
);
857 ret
= debuginfo__find_line_range(dinfo
, lr
);
859 debuginfo__delete(dinfo
);
860 if (ret
== 0 || ret
== -ENOENT
) {
861 pr_warning("Specified source line is not found.\n");
863 } else if (ret
< 0) {
864 pr_warning("Debuginfo analysis failed.\n");
868 /* Convert source file path */
870 ret
= get_real_path(tmp
, lr
->comp_dir
, &lr
->path
);
872 /* Free old path when new path is assigned */
877 pr_warning("Failed to find source file path.\n");
884 fprintf(stdout
, "<%s@%s:%d>\n", lr
->function
, lr
->path
,
885 lr
->start
- lr
->offset
);
887 fprintf(stdout
, "<%s:%d>\n", lr
->path
, lr
->start
);
889 fp
= fopen(lr
->path
, "r");
891 pr_warning("Failed to open %s: %s\n", lr
->path
,
892 strerror_r(errno
, sbuf
, sizeof(sbuf
)));
895 /* Skip to starting line number */
896 while (l
< lr
->start
) {
897 ret
= skip_one_line(fp
, l
++);
902 intlist__for_each(ln
, lr
->line_list
) {
903 for (; ln
->i
> l
; l
++) {
904 ret
= show_one_line(fp
, l
- lr
->offset
);
908 ret
= show_one_line_with_num(fp
, l
++ - lr
->offset
);
913 if (lr
->end
== INT_MAX
)
914 lr
->end
= l
+ NR_ADDITIONAL_LINES
;
915 while (l
<= lr
->end
) {
916 ret
= show_one_line_or_eof(fp
, l
++ - lr
->offset
);
925 int show_line_range(struct line_range
*lr
, const char *module
, bool user
)
929 ret
= init_probe_symbol_maps(user
);
932 ret
= __show_line_range(lr
, module
, user
);
933 exit_probe_symbol_maps();
938 static int show_available_vars_at(struct debuginfo
*dinfo
,
939 struct perf_probe_event
*pev
,
940 struct strfilter
*_filter
)
944 struct str_node
*node
;
945 struct variable_list
*vls
= NULL
, *vl
;
946 struct perf_probe_point tmp
;
949 buf
= synthesize_perf_probe_point(&pev
->point
);
952 pr_debug("Searching variables at %s\n", buf
);
954 ret
= debuginfo__find_available_vars_at(dinfo
, pev
, &vls
);
955 if (!ret
) { /* Not found, retry with an alternative */
956 ret
= get_alternative_probe_event(dinfo
, pev
, &tmp
);
958 ret
= debuginfo__find_available_vars_at(dinfo
, pev
,
960 /* Release the old probe_point */
961 clear_perf_probe_point(&tmp
);
965 if (ret
== 0 || ret
== -ENOENT
) {
966 pr_err("Failed to find the address of %s\n", buf
);
969 pr_warning("Debuginfo analysis failed.\n");
973 /* Some variables are found */
974 fprintf(stdout
, "Available variables at %s\n", buf
);
975 for (i
= 0; i
< ret
; i
++) {
978 * A probe point might be converted to
979 * several trace points.
981 fprintf(stdout
, "\t@<%s+%lu>\n", vl
->point
.symbol
,
983 zfree(&vl
->point
.symbol
);
986 strlist__for_each(node
, vl
->vars
) {
987 var
= strchr(node
->s
, '\t') + 1;
988 if (strfilter__compare(_filter
, var
)) {
989 fprintf(stdout
, "\t\t%s\n", node
->s
);
993 strlist__delete(vl
->vars
);
996 fprintf(stdout
, "\t\t(No matched variables)\n");
1004 /* Show available variables on given probe point */
1005 int show_available_vars(struct perf_probe_event
*pevs
, int npevs
,
1006 struct strfilter
*_filter
)
1009 struct debuginfo
*dinfo
;
1011 ret
= init_probe_symbol_maps(pevs
->uprobes
);
1015 dinfo
= open_debuginfo(pevs
->target
, false);
1023 for (i
= 0; i
< npevs
&& ret
>= 0; i
++)
1024 ret
= show_available_vars_at(dinfo
, &pevs
[i
], _filter
);
1026 debuginfo__delete(dinfo
);
1028 exit_probe_symbol_maps();
1032 #else /* !HAVE_DWARF_SUPPORT */
1034 static void debuginfo_cache__exit(void)
1039 find_perf_probe_point_from_dwarf(struct probe_trace_point
*tp __maybe_unused
,
1040 struct perf_probe_point
*pp __maybe_unused
,
1041 bool is_kprobe __maybe_unused
)
1046 static int try_to_find_probe_trace_events(struct perf_probe_event
*pev
,
1047 struct probe_trace_event
**tevs __maybe_unused
)
1049 if (perf_probe_event_need_dwarf(pev
)) {
1050 pr_warning("Debuginfo-analysis is not supported.\n");
1057 int show_line_range(struct line_range
*lr __maybe_unused
,
1058 const char *module __maybe_unused
,
1059 bool user __maybe_unused
)
1061 pr_warning("Debuginfo-analysis is not supported.\n");
1065 int show_available_vars(struct perf_probe_event
*pevs __maybe_unused
,
1066 int npevs __maybe_unused
,
1067 struct strfilter
*filter __maybe_unused
)
1069 pr_warning("Debuginfo-analysis is not supported.\n");
1074 void line_range__clear(struct line_range
*lr
)
1080 intlist__delete(lr
->line_list
);
1081 memset(lr
, 0, sizeof(*lr
));
1084 int line_range__init(struct line_range
*lr
)
1086 memset(lr
, 0, sizeof(*lr
));
1087 lr
->line_list
= intlist__new(NULL
);
1094 static int parse_line_num(char **ptr
, int *val
, const char *what
)
1096 const char *start
= *ptr
;
1099 *val
= strtol(*ptr
, ptr
, 0);
1100 if (errno
|| *ptr
== start
) {
1101 semantic_error("'%s' is not a valid number.\n", what
);
1107 /* Check the name is good for event, group or function */
1108 static bool is_c_func_name(const char *name
)
1110 if (!isalpha(*name
) && *name
!= '_')
1112 while (*++name
!= '\0') {
1113 if (!isalpha(*name
) && !isdigit(*name
) && *name
!= '_')
1120 * Stuff 'lr' according to the line range described by 'arg'.
1121 * The line range syntax is described by:
1123 * SRC[:SLN[+NUM|-ELN]]
1124 * FNC[@SRC][:SLN[+NUM|-ELN]]
1126 int parse_line_range_desc(const char *arg
, struct line_range
*lr
)
1128 char *range
, *file
, *name
= strdup(arg
);
1137 range
= strchr(name
, ':');
1141 err
= parse_line_num(&range
, &lr
->start
, "start line");
1145 if (*range
== '+' || *range
== '-') {
1146 const char c
= *range
++;
1148 err
= parse_line_num(&range
, &lr
->end
, "end line");
1153 lr
->end
+= lr
->start
;
1155 * Adjust the number of lines here.
1156 * If the number of lines == 1, the
1157 * the end of line should be equal to
1158 * the start of line.
1164 pr_debug("Line range is %d to %d\n", lr
->start
, lr
->end
);
1167 if (lr
->start
> lr
->end
) {
1168 semantic_error("Start line must be smaller"
1169 " than end line.\n");
1172 if (*range
!= '\0') {
1173 semantic_error("Tailing with invalid str '%s'.\n", range
);
1178 file
= strchr(name
, '@');
1181 lr
->file
= strdup(++file
);
1182 if (lr
->file
== NULL
) {
1186 lr
->function
= name
;
1187 } else if (strchr(name
, '/') || strchr(name
, '.'))
1189 else if (is_c_func_name(name
))/* We reuse it for checking funcname */
1190 lr
->function
= name
;
1191 else { /* Invalid name */
1192 semantic_error("'%s' is not a valid function name.\n", name
);
1203 /* Parse probepoint definition. */
1204 static int parse_perf_probe_point(char *arg
, struct perf_probe_event
*pev
)
1206 struct perf_probe_point
*pp
= &pev
->point
;
1209 bool file_spec
= false;
1212 * perf probe [EVENT=]SRC[:LN|;PTN]
1213 * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
1215 * TODO:Group name support
1220 ptr
= strpbrk(arg
, ";=@+%");
1221 if (ptr
&& *ptr
== '=') { /* Event name */
1224 if (strchr(arg
, ':')) {
1225 semantic_error("Group name is not supported yet.\n");
1228 if (!is_c_func_name(arg
)) {
1229 semantic_error("%s is bad for event name -it must "
1230 "follow C symbol-naming rule.\n", arg
);
1233 pev
->event
= strdup(arg
);
1234 if (pev
->event
== NULL
)
1241 * Check arg is function or file name and copy it.
1243 * We consider arg to be a file spec if and only if it satisfies
1244 * all of the below criteria::
1245 * - it does not include any of "+@%",
1246 * - it includes one of ":;", and
1247 * - it has a period '.' in the name.
1249 * Otherwise, we consider arg to be a function specification.
1251 if (!strpbrk(arg
, "+@%") && (ptr
= strpbrk(arg
, ";:")) != NULL
) {
1252 /* This is a file spec if it includes a '.' before ; or : */
1253 if (memchr(arg
, '.', ptr
- arg
))
1257 ptr
= strpbrk(arg
, ";:+@%");
1277 * Keep pp->function even if this is absolute address,
1278 * so it can mark whether abs_address is valid.
1279 * Which make 'perf probe lib.bin 0x0' possible.
1281 * Note that checking length of tmp is not needed
1282 * because when we access tmp[1] we know tmp[0] is '0',
1283 * so tmp[1] should always valid (but could be '\0').
1285 if (tmp
&& !strncmp(tmp
, "0x", 2)) {
1286 pp
->abs_address
= strtoul(pp
->function
, &tmp
, 0);
1288 semantic_error("Invalid absolute address.\n");
1294 /* Parse other options */
1298 if (c
== ';') { /* Lazy pattern must be the last part */
1299 pp
->lazy_line
= strdup(arg
);
1300 if (pp
->lazy_line
== NULL
)
1304 ptr
= strpbrk(arg
, ";:+@%");
1310 case ':': /* Line number */
1311 pp
->line
= strtoul(arg
, &tmp
, 0);
1313 semantic_error("There is non-digit char"
1314 " in line number.\n");
1318 case '+': /* Byte offset from a symbol */
1319 pp
->offset
= strtoul(arg
, &tmp
, 0);
1321 semantic_error("There is non-digit character"
1326 case '@': /* File name */
1328 semantic_error("SRC@SRC is not allowed.\n");
1331 pp
->file
= strdup(arg
);
1332 if (pp
->file
== NULL
)
1335 case '%': /* Probe places */
1336 if (strcmp(arg
, "return") == 0) {
1338 } else { /* Others not supported yet */
1339 semantic_error("%%%s is not supported.\n", arg
);
1343 default: /* Buggy case */
1344 pr_err("This program has a bug at %s:%d.\n",
1345 __FILE__
, __LINE__
);
1351 /* Exclusion check */
1352 if (pp
->lazy_line
&& pp
->line
) {
1353 semantic_error("Lazy pattern can't be used with"
1358 if (pp
->lazy_line
&& pp
->offset
) {
1359 semantic_error("Lazy pattern can't be used with offset.\n");
1363 if (pp
->line
&& pp
->offset
) {
1364 semantic_error("Offset can't be used with line number.\n");
1368 if (!pp
->line
&& !pp
->lazy_line
&& pp
->file
&& !pp
->function
) {
1369 semantic_error("File always requires line number or "
1374 if (pp
->offset
&& !pp
->function
) {
1375 semantic_error("Offset requires an entry function.\n");
1379 if (pp
->retprobe
&& !pp
->function
) {
1380 semantic_error("Return probe requires an entry function.\n");
1384 if ((pp
->offset
|| pp
->line
|| pp
->lazy_line
) && pp
->retprobe
) {
1385 semantic_error("Offset/Line/Lazy pattern can't be used with "
1390 pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
1391 pp
->function
, pp
->file
, pp
->line
, pp
->offset
, pp
->retprobe
,
1396 /* Parse perf-probe event argument */
1397 static int parse_perf_probe_arg(char *str
, struct perf_probe_arg
*arg
)
1399 char *tmp
, *goodname
;
1400 struct perf_probe_arg_field
**fieldp
;
1402 pr_debug("parsing arg: %s into ", str
);
1404 tmp
= strchr(str
, '=');
1406 arg
->name
= strndup(str
, tmp
- str
);
1407 if (arg
->name
== NULL
)
1409 pr_debug("name:%s ", arg
->name
);
1413 tmp
= strchr(str
, ':');
1414 if (tmp
) { /* Type setting */
1416 arg
->type
= strdup(tmp
+ 1);
1417 if (arg
->type
== NULL
)
1419 pr_debug("type:%s ", arg
->type
);
1422 tmp
= strpbrk(str
, "-.[");
1423 if (!is_c_varname(str
) || !tmp
) {
1424 /* A variable, register, symbol or special value */
1425 arg
->var
= strdup(str
);
1426 if (arg
->var
== NULL
)
1428 pr_debug("%s\n", arg
->var
);
1432 /* Structure fields or array element */
1433 arg
->var
= strndup(str
, tmp
- str
);
1434 if (arg
->var
== NULL
)
1436 goodname
= arg
->var
;
1437 pr_debug("%s, ", arg
->var
);
1438 fieldp
= &arg
->field
;
1441 *fieldp
= zalloc(sizeof(struct perf_probe_arg_field
));
1442 if (*fieldp
== NULL
)
1444 if (*tmp
== '[') { /* Array */
1446 (*fieldp
)->index
= strtol(str
+ 1, &tmp
, 0);
1447 (*fieldp
)->ref
= true;
1448 if (*tmp
!= ']' || tmp
== str
+ 1) {
1449 semantic_error("Array index must be a"
1456 } else { /* Structure */
1459 (*fieldp
)->ref
= false;
1460 } else if (tmp
[1] == '>') {
1462 (*fieldp
)->ref
= true;
1464 semantic_error("Argument parse error: %s\n",
1468 tmp
= strpbrk(str
, "-.[");
1471 (*fieldp
)->name
= strndup(str
, tmp
- str
);
1472 if ((*fieldp
)->name
== NULL
)
1475 goodname
= (*fieldp
)->name
;
1476 pr_debug("%s(%d), ", (*fieldp
)->name
, (*fieldp
)->ref
);
1477 fieldp
= &(*fieldp
)->next
;
1480 (*fieldp
)->name
= strdup(str
);
1481 if ((*fieldp
)->name
== NULL
)
1484 goodname
= (*fieldp
)->name
;
1485 pr_debug("%s(%d)\n", (*fieldp
)->name
, (*fieldp
)->ref
);
1487 /* If no name is specified, set the last field name (not array index)*/
1489 arg
->name
= strdup(goodname
);
1490 if (arg
->name
== NULL
)
1496 /* Parse perf-probe event command */
1497 int parse_perf_probe_command(const char *cmd
, struct perf_probe_event
*pev
)
1500 int argc
, i
, ret
= 0;
1502 argv
= argv_split(cmd
, &argc
);
1504 pr_debug("Failed to split arguments.\n");
1507 if (argc
- 1 > MAX_PROBE_ARGS
) {
1508 semantic_error("Too many probe arguments (%d).\n", argc
- 1);
1512 /* Parse probe point */
1513 ret
= parse_perf_probe_point(argv
[0], pev
);
1517 /* Copy arguments and ensure return probe has no C argument */
1518 pev
->nargs
= argc
- 1;
1519 pev
->args
= zalloc(sizeof(struct perf_probe_arg
) * pev
->nargs
);
1520 if (pev
->args
== NULL
) {
1524 for (i
= 0; i
< pev
->nargs
&& ret
>= 0; i
++) {
1525 ret
= parse_perf_probe_arg(argv
[i
+ 1], &pev
->args
[i
]);
1527 is_c_varname(pev
->args
[i
].var
) && pev
->point
.retprobe
) {
1528 semantic_error("You can't specify local variable for"
1539 /* Return true if this perf_probe_event requires debuginfo */
1540 bool perf_probe_event_need_dwarf(struct perf_probe_event
*pev
)
1544 if (pev
->point
.file
|| pev
->point
.line
|| pev
->point
.lazy_line
)
1547 for (i
= 0; i
< pev
->nargs
; i
++)
1548 if (is_c_varname(pev
->args
[i
].var
))
1554 /* Parse probe_events event into struct probe_point */
1555 int parse_probe_trace_command(const char *cmd
, struct probe_trace_event
*tev
)
1557 struct probe_trace_point
*tp
= &tev
->point
;
1560 char *argv0_str
= NULL
, *fmt
, *fmt1_str
, *fmt2_str
, *fmt3_str
;
1564 pr_debug("Parsing probe_events: %s\n", cmd
);
1565 argv
= argv_split(cmd
, &argc
);
1567 pr_debug("Failed to split arguments.\n");
1571 semantic_error("Too few probe arguments.\n");
1576 /* Scan event and group name. */
1577 argv0_str
= strdup(argv
[0]);
1578 if (argv0_str
== NULL
) {
1582 fmt1_str
= strtok_r(argv0_str
, ":", &fmt
);
1583 fmt2_str
= strtok_r(NULL
, "/", &fmt
);
1584 fmt3_str
= strtok_r(NULL
, " \t", &fmt
);
1585 if (fmt1_str
== NULL
|| strlen(fmt1_str
) != 1 || fmt2_str
== NULL
1586 || fmt3_str
== NULL
) {
1587 semantic_error("Failed to parse event name: %s\n", argv
[0]);
1592 tev
->group
= strdup(fmt2_str
);
1593 tev
->event
= strdup(fmt3_str
);
1594 if (tev
->group
== NULL
|| tev
->event
== NULL
) {
1598 pr_debug("Group:%s Event:%s probe:%c\n", tev
->group
, tev
->event
, pr
);
1600 tp
->retprobe
= (pr
== 'r');
1602 /* Scan module name(if there), function name and offset */
1603 p
= strchr(argv
[1], ':');
1605 tp
->module
= strndup(argv
[1], p
- argv
[1]);
1613 fmt1_str
= strtok_r(p
, "+", &fmt
);
1614 /* only the address started with 0x */
1615 if (fmt1_str
[0] == '0') {
1617 * Fix a special case:
1618 * if address == 0, kernel reports something like:
1619 * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax
1620 * Newer kernel may fix that, but we want to
1621 * support old kernel also.
1623 if (strcmp(fmt1_str
, "0x") == 0) {
1624 if (!argv
[2] || strcmp(argv
[2], "(null)")) {
1631 for (i
= 2; argv
[i
+ 1] != NULL
; i
++)
1632 argv
[i
] = argv
[i
+ 1];
1637 tp
->address
= strtoul(fmt1_str
, NULL
, 0);
1639 /* Only the symbol-based probe has offset */
1640 tp
->symbol
= strdup(fmt1_str
);
1641 if (tp
->symbol
== NULL
) {
1645 fmt2_str
= strtok_r(NULL
, "", &fmt
);
1646 if (fmt2_str
== NULL
)
1649 tp
->offset
= strtoul(fmt2_str
, NULL
, 10);
1652 tev
->nargs
= argc
- 2;
1653 tev
->args
= zalloc(sizeof(struct probe_trace_arg
) * tev
->nargs
);
1654 if (tev
->args
== NULL
) {
1658 for (i
= 0; i
< tev
->nargs
; i
++) {
1659 p
= strchr(argv
[i
+ 2], '=');
1660 if (p
) /* We don't need which register is assigned. */
1664 tev
->args
[i
].name
= strdup(argv
[i
+ 2]);
1665 /* TODO: parse regs and offset */
1666 tev
->args
[i
].value
= strdup(p
);
1667 if (tev
->args
[i
].name
== NULL
|| tev
->args
[i
].value
== NULL
) {
1679 /* Compose only probe arg */
1680 char *synthesize_perf_probe_arg(struct perf_probe_arg
*pa
)
1682 struct perf_probe_arg_field
*field
= pa
->field
;
1687 if (strbuf_init(&buf
, 64) < 0)
1690 if (pa
->name
&& pa
->var
)
1691 err
= strbuf_addf(&buf
, "%s=%s", pa
->name
, pa
->var
);
1693 err
= strbuf_addstr(&buf
, pa
->name
?: pa
->var
);
1698 if (field
->name
[0] == '[')
1699 err
= strbuf_addstr(&buf
, field
->name
);
1701 err
= strbuf_addf(&buf
, "%s%s", field
->ref
? "->" : ".",
1703 field
= field
->next
;
1709 if (strbuf_addf(&buf
, ":%s", pa
->type
) < 0)
1712 ret
= strbuf_detach(&buf
, NULL
);
1714 strbuf_release(&buf
);
1718 /* Compose only probe point (not argument) */
1719 static char *synthesize_perf_probe_point(struct perf_probe_point
*pp
)
1722 char *tmp
, *ret
= NULL
;
1725 if (strbuf_init(&buf
, 64) < 0)
1729 if (strbuf_addstr(&buf
, pp
->function
) < 0)
1732 err
= strbuf_addf(&buf
, "+%lu", pp
->offset
);
1734 err
= strbuf_addf(&buf
, ":%d", pp
->line
);
1735 else if (pp
->retprobe
)
1736 err
= strbuf_addstr(&buf
, "%return");
1744 tmp
= strchr(pp
->file
+ len
- 30, '/');
1745 tmp
= tmp
? tmp
+ 1 : pp
->file
+ len
- 30;
1747 err
= strbuf_addf(&buf
, "@%s", tmp
);
1748 if (!err
&& !pp
->function
&& pp
->line
)
1749 err
= strbuf_addf(&buf
, ":%d", pp
->line
);
1752 ret
= strbuf_detach(&buf
, NULL
);
1754 strbuf_release(&buf
);
1759 char *synthesize_perf_probe_command(struct perf_probe_event
*pev
)
1764 buf
= synthesize_perf_probe_point(&pev
->point
);
1769 for (i
= 0; i
< pev
->nargs
; i
++) {
1770 ret
= e_snprintf(&buf
[len
], MAX_CMDLEN
- len
, " %s",
1783 static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref
*ref
,
1784 struct strbuf
*buf
, int depth
)
1788 depth
= __synthesize_probe_trace_arg_ref(ref
->next
, buf
,
1793 err
= strbuf_addf(buf
, "%+ld(", ref
->offset
);
1794 return (err
< 0) ? err
: depth
;
1797 static int synthesize_probe_trace_arg(struct probe_trace_arg
*arg
,
1800 struct probe_trace_arg_ref
*ref
= arg
->ref
;
1803 /* Argument name or separator */
1805 err
= strbuf_addf(buf
, " %s=", arg
->name
);
1807 err
= strbuf_addch(buf
, ' ');
1811 /* Special case: @XXX */
1812 if (arg
->value
[0] == '@' && arg
->ref
)
1815 /* Dereferencing arguments */
1817 depth
= __synthesize_probe_trace_arg_ref(ref
, buf
, 1);
1822 /* Print argument value */
1823 if (arg
->value
[0] == '@' && arg
->ref
)
1824 err
= strbuf_addf(buf
, "%s%+ld", arg
->value
, arg
->ref
->offset
);
1826 err
= strbuf_addstr(buf
, arg
->value
);
1829 while (!err
&& depth
--)
1830 err
= strbuf_addch(buf
, ')');
1832 /* Print argument type */
1833 if (!err
&& arg
->type
)
1834 err
= strbuf_addf(buf
, ":%s", arg
->type
);
1839 char *synthesize_probe_trace_command(struct probe_trace_event
*tev
)
1841 struct probe_trace_point
*tp
= &tev
->point
;
1846 /* Uprobes must have tp->module */
1847 if (tev
->uprobes
&& !tp
->module
)
1850 if (strbuf_init(&buf
, 32) < 0)
1853 if (strbuf_addf(&buf
, "%c:%s/%s ", tp
->retprobe
? 'r' : 'p',
1854 tev
->group
, tev
->event
) < 0)
1857 * If tp->address == 0, then this point must be a
1858 * absolute address uprobe.
1859 * try_to_find_absolute_address() should have made
1860 * tp->symbol to "0x0".
1862 if (tev
->uprobes
&& !tp
->address
) {
1863 if (!tp
->symbol
|| strcmp(tp
->symbol
, "0x0"))
1867 /* Use the tp->address for uprobes */
1869 err
= strbuf_addf(&buf
, "%s:0x%lx", tp
->module
, tp
->address
);
1870 else if (!strncmp(tp
->symbol
, "0x", 2))
1871 /* Absolute address. See try_to_find_absolute_address() */
1872 err
= strbuf_addf(&buf
, "%s%s0x%lx", tp
->module
?: "",
1873 tp
->module
? ":" : "", tp
->address
);
1875 err
= strbuf_addf(&buf
, "%s%s%s+%lu", tp
->module
?: "",
1876 tp
->module
? ":" : "", tp
->symbol
, tp
->offset
);
1880 for (i
= 0; i
< tev
->nargs
; i
++)
1881 if (synthesize_probe_trace_arg(&tev
->args
[i
], &buf
) < 0)
1884 ret
= strbuf_detach(&buf
, NULL
);
1886 strbuf_release(&buf
);
1890 static int find_perf_probe_point_from_map(struct probe_trace_point
*tp
,
1891 struct perf_probe_point
*pp
,
1894 struct symbol
*sym
= NULL
;
1896 u64 addr
= tp
->address
;
1900 map
= dso__new_map(tp
->module
);
1903 sym
= map__find_symbol(map
, addr
, NULL
);
1905 if (tp
->symbol
&& !addr
) {
1906 if (kernel_get_symbol_address_by_name(tp
->symbol
,
1907 &addr
, true, false) < 0)
1912 sym
= __find_kernel_function(addr
, &map
);
1919 pp
->retprobe
= tp
->retprobe
;
1920 pp
->offset
= addr
- map
->unmap_ip(map
, sym
->start
);
1921 pp
->function
= strdup(sym
->name
);
1922 ret
= pp
->function
? 0 : -ENOMEM
;
1925 if (map
&& !is_kprobe
) {
1932 static int convert_to_perf_probe_point(struct probe_trace_point
*tp
,
1933 struct perf_probe_point
*pp
,
1939 ret
= find_perf_probe_point_from_dwarf(tp
, pp
, is_kprobe
);
1942 ret
= find_perf_probe_point_from_map(tp
, pp
, is_kprobe
);
1946 pr_debug("Failed to find probe point from both of dwarf and map.\n");
1949 pp
->function
= strdup(tp
->symbol
);
1950 pp
->offset
= tp
->offset
;
1952 ret
= e_snprintf(buf
, 128, "0x%" PRIx64
, (u64
)tp
->address
);
1955 pp
->function
= strdup(buf
);
1958 if (pp
->function
== NULL
)
1961 pp
->retprobe
= tp
->retprobe
;
1966 static int convert_to_perf_probe_event(struct probe_trace_event
*tev
,
1967 struct perf_probe_event
*pev
, bool is_kprobe
)
1969 struct strbuf buf
= STRBUF_INIT
;
1972 /* Convert event/group name */
1973 pev
->event
= strdup(tev
->event
);
1974 pev
->group
= strdup(tev
->group
);
1975 if (pev
->event
== NULL
|| pev
->group
== NULL
)
1978 /* Convert trace_point to probe_point */
1979 ret
= convert_to_perf_probe_point(&tev
->point
, &pev
->point
, is_kprobe
);
1983 /* Convert trace_arg to probe_arg */
1984 pev
->nargs
= tev
->nargs
;
1985 pev
->args
= zalloc(sizeof(struct perf_probe_arg
) * pev
->nargs
);
1986 if (pev
->args
== NULL
)
1988 for (i
= 0; i
< tev
->nargs
&& ret
>= 0; i
++) {
1989 if (tev
->args
[i
].name
)
1990 pev
->args
[i
].name
= strdup(tev
->args
[i
].name
);
1992 if ((ret
= strbuf_init(&buf
, 32)) < 0)
1994 ret
= synthesize_probe_trace_arg(&tev
->args
[i
], &buf
);
1995 pev
->args
[i
].name
= strbuf_detach(&buf
, NULL
);
1997 if (pev
->args
[i
].name
== NULL
&& ret
>= 0)
2002 clear_perf_probe_event(pev
);
2007 void clear_perf_probe_event(struct perf_probe_event
*pev
)
2009 struct perf_probe_arg_field
*field
, *next
;
2015 clear_perf_probe_point(&pev
->point
);
2017 for (i
= 0; i
< pev
->nargs
; i
++) {
2018 free(pev
->args
[i
].name
);
2019 free(pev
->args
[i
].var
);
2020 free(pev
->args
[i
].type
);
2021 field
= pev
->args
[i
].field
;
2024 zfree(&field
->name
);
2030 memset(pev
, 0, sizeof(*pev
));
2033 #define strdup_or_goto(str, label) \
2034 ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; })
2036 static int perf_probe_point__copy(struct perf_probe_point
*dst
,
2037 struct perf_probe_point
*src
)
2039 dst
->file
= strdup_or_goto(src
->file
, out_err
);
2040 dst
->function
= strdup_or_goto(src
->function
, out_err
);
2041 dst
->lazy_line
= strdup_or_goto(src
->lazy_line
, out_err
);
2042 dst
->line
= src
->line
;
2043 dst
->retprobe
= src
->retprobe
;
2044 dst
->offset
= src
->offset
;
2048 clear_perf_probe_point(dst
);
2052 static int perf_probe_arg__copy(struct perf_probe_arg
*dst
,
2053 struct perf_probe_arg
*src
)
2055 struct perf_probe_arg_field
*field
, **ppfield
;
2057 dst
->name
= strdup_or_goto(src
->name
, out_err
);
2058 dst
->var
= strdup_or_goto(src
->var
, out_err
);
2059 dst
->type
= strdup_or_goto(src
->type
, out_err
);
2062 ppfield
= &(dst
->field
);
2064 *ppfield
= zalloc(sizeof(*field
));
2067 (*ppfield
)->name
= strdup_or_goto(field
->name
, out_err
);
2068 (*ppfield
)->index
= field
->index
;
2069 (*ppfield
)->ref
= field
->ref
;
2070 field
= field
->next
;
2071 ppfield
= &((*ppfield
)->next
);
2078 int perf_probe_event__copy(struct perf_probe_event
*dst
,
2079 struct perf_probe_event
*src
)
2083 dst
->event
= strdup_or_goto(src
->event
, out_err
);
2084 dst
->group
= strdup_or_goto(src
->group
, out_err
);
2085 dst
->target
= strdup_or_goto(src
->target
, out_err
);
2086 dst
->uprobes
= src
->uprobes
;
2088 if (perf_probe_point__copy(&dst
->point
, &src
->point
) < 0)
2091 dst
->args
= zalloc(sizeof(struct perf_probe_arg
) * src
->nargs
);
2094 dst
->nargs
= src
->nargs
;
2096 for (i
= 0; i
< src
->nargs
; i
++)
2097 if (perf_probe_arg__copy(&dst
->args
[i
], &src
->args
[i
]) < 0)
2102 clear_perf_probe_event(dst
);
2106 void clear_probe_trace_event(struct probe_trace_event
*tev
)
2108 struct probe_trace_arg_ref
*ref
, *next
;
2113 free(tev
->point
.symbol
);
2114 free(tev
->point
.realname
);
2115 free(tev
->point
.module
);
2116 for (i
= 0; i
< tev
->nargs
; i
++) {
2117 free(tev
->args
[i
].name
);
2118 free(tev
->args
[i
].value
);
2119 free(tev
->args
[i
].type
);
2120 ref
= tev
->args
[i
].ref
;
2128 memset(tev
, 0, sizeof(*tev
));
2131 struct kprobe_blacklist_node
{
2132 struct list_head list
;
2133 unsigned long start
;
2138 static void kprobe_blacklist__delete(struct list_head
*blacklist
)
2140 struct kprobe_blacklist_node
*node
;
2142 while (!list_empty(blacklist
)) {
2143 node
= list_first_entry(blacklist
,
2144 struct kprobe_blacklist_node
, list
);
2145 list_del(&node
->list
);
2151 static int kprobe_blacklist__load(struct list_head
*blacklist
)
2153 struct kprobe_blacklist_node
*node
;
2154 const char *__debugfs
= debugfs__mountpoint();
2155 char buf
[PATH_MAX
], *p
;
2159 if (__debugfs
== NULL
)
2162 ret
= e_snprintf(buf
, PATH_MAX
, "%s/kprobes/blacklist", __debugfs
);
2166 fp
= fopen(buf
, "r");
2171 while (fgets(buf
, PATH_MAX
, fp
)) {
2172 node
= zalloc(sizeof(*node
));
2177 INIT_LIST_HEAD(&node
->list
);
2178 list_add_tail(&node
->list
, blacklist
);
2179 if (sscanf(buf
, "0x%lx-0x%lx", &node
->start
, &node
->end
) != 2) {
2183 p
= strchr(buf
, '\t');
2186 if (p
[strlen(p
) - 1] == '\n')
2187 p
[strlen(p
) - 1] = '\0';
2189 p
= (char *)"unknown";
2190 node
->symbol
= strdup(p
);
2191 if (!node
->symbol
) {
2195 pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n",
2196 node
->start
, node
->end
, node
->symbol
);
2200 kprobe_blacklist__delete(blacklist
);
2206 static struct kprobe_blacklist_node
*
2207 kprobe_blacklist__find_by_address(struct list_head
*blacklist
,
2208 unsigned long address
)
2210 struct kprobe_blacklist_node
*node
;
2212 list_for_each_entry(node
, blacklist
, list
) {
2213 if (node
->start
<= address
&& address
<= node
->end
)
2220 static LIST_HEAD(kprobe_blacklist
);
2222 static void kprobe_blacklist__init(void)
2224 if (!list_empty(&kprobe_blacklist
))
2227 if (kprobe_blacklist__load(&kprobe_blacklist
) < 0)
2228 pr_debug("No kprobe blacklist support, ignored\n");
2231 static void kprobe_blacklist__release(void)
2233 kprobe_blacklist__delete(&kprobe_blacklist
);
2236 static bool kprobe_blacklist__listed(unsigned long address
)
2238 return !!kprobe_blacklist__find_by_address(&kprobe_blacklist
, address
);
2241 static int perf_probe_event__sprintf(const char *group
, const char *event
,
2242 struct perf_probe_event
*pev
,
2244 struct strbuf
*result
)
2249 if (asprintf(&buf
, "%s:%s", group
, event
) < 0)
2251 ret
= strbuf_addf(result
, " %-20s (on ", buf
);
2256 /* Synthesize only event probe point */
2257 buf
= synthesize_perf_probe_point(&pev
->point
);
2260 ret
= strbuf_addstr(result
, buf
);
2264 ret
= strbuf_addf(result
, " in %s", module
);
2266 if (!ret
&& pev
->nargs
> 0) {
2267 ret
= strbuf_add(result
, " with", 5);
2268 for (i
= 0; !ret
&& i
< pev
->nargs
; i
++) {
2269 buf
= synthesize_perf_probe_arg(&pev
->args
[i
]);
2272 ret
= strbuf_addf(result
, " %s", buf
);
2277 ret
= strbuf_addch(result
, ')');
2283 int show_perf_probe_event(const char *group
, const char *event
,
2284 struct perf_probe_event
*pev
,
2285 const char *module
, bool use_stdout
)
2287 struct strbuf buf
= STRBUF_INIT
;
2290 ret
= perf_probe_event__sprintf(group
, event
, pev
, module
, &buf
);
2293 printf("%s\n", buf
.buf
);
2295 pr_info("%s\n", buf
.buf
);
2297 strbuf_release(&buf
);
2302 static bool filter_probe_trace_event(struct probe_trace_event
*tev
,
2303 struct strfilter
*filter
)
2307 /* At first, check the event name itself */
2308 if (strfilter__compare(filter
, tev
->event
))
2311 /* Next, check the combination of name and group */
2312 if (e_snprintf(tmp
, 128, "%s:%s", tev
->group
, tev
->event
) < 0)
2314 return strfilter__compare(filter
, tmp
);
2317 static int __show_perf_probe_events(int fd
, bool is_kprobe
,
2318 struct strfilter
*filter
)
2321 struct probe_trace_event tev
;
2322 struct perf_probe_event pev
;
2323 struct strlist
*rawlist
;
2324 struct str_node
*ent
;
2326 memset(&tev
, 0, sizeof(tev
));
2327 memset(&pev
, 0, sizeof(pev
));
2329 rawlist
= probe_file__get_rawlist(fd
);
2333 strlist__for_each(ent
, rawlist
) {
2334 ret
= parse_probe_trace_command(ent
->s
, &tev
);
2336 if (!filter_probe_trace_event(&tev
, filter
))
2338 ret
= convert_to_perf_probe_event(&tev
, &pev
,
2342 ret
= show_perf_probe_event(pev
.group
, pev
.event
,
2343 &pev
, tev
.point
.module
,
2347 clear_perf_probe_event(&pev
);
2348 clear_probe_trace_event(&tev
);
2352 strlist__delete(rawlist
);
2353 /* Cleanup cached debuginfo if needed */
2354 debuginfo_cache__exit();
2359 /* List up current perf-probe events */
2360 int show_perf_probe_events(struct strfilter
*filter
)
2362 int kp_fd
, up_fd
, ret
;
2366 ret
= init_probe_symbol_maps(false);
2370 ret
= probe_file__open_both(&kp_fd
, &up_fd
, 0);
2375 ret
= __show_perf_probe_events(kp_fd
, true, filter
);
2376 if (up_fd
>= 0 && ret
>= 0)
2377 ret
= __show_perf_probe_events(up_fd
, false, filter
);
2382 exit_probe_symbol_maps();
2387 static int get_new_event_name(char *buf
, size_t len
, const char *base
,
2388 struct strlist
*namelist
, bool allow_suffix
)
2395 nbase
= strdup(base
);
2399 /* Cut off the dot suffixes (e.g. .const, .isra)*/
2400 p
= strchr(nbase
, '.');
2401 if (p
&& p
!= nbase
)
2404 /* Try no suffix number */
2405 ret
= e_snprintf(buf
, len
, "%s", nbase
);
2407 pr_debug("snprintf() failed: %d\n", ret
);
2410 if (!strlist__has_entry(namelist
, buf
))
2413 if (!allow_suffix
) {
2414 pr_warning("Error: event \"%s\" already exists.\n"
2415 " Hint: Remove existing event by 'perf probe -d'\n"
2416 " or force duplicates by 'perf probe -f'\n"
2417 " or set 'force=yes' in BPF source.\n",
2423 /* Try to add suffix */
2424 for (i
= 1; i
< MAX_EVENT_INDEX
; i
++) {
2425 ret
= e_snprintf(buf
, len
, "%s_%d", nbase
, i
);
2427 pr_debug("snprintf() failed: %d\n", ret
);
2430 if (!strlist__has_entry(namelist
, buf
))
2433 if (i
== MAX_EVENT_INDEX
) {
2434 pr_warning("Too many events are on the same function.\n");
2443 /* Warn if the current kernel's uprobe implementation is old */
2444 static void warn_uprobe_event_compat(struct probe_trace_event
*tev
)
2447 char *buf
= synthesize_probe_trace_command(tev
);
2449 /* Old uprobe event doesn't support memory dereference */
2450 if (!tev
->uprobes
|| tev
->nargs
== 0 || !buf
)
2453 for (i
= 0; i
< tev
->nargs
; i
++)
2454 if (strglobmatch(tev
->args
[i
].value
, "[$@+-]*")) {
2455 pr_warning("Please upgrade your kernel to at least "
2456 "3.14 to have access to feature %s\n",
2457 tev
->args
[i
].value
);
2464 /* Set new name from original perf_probe_event and namelist */
2465 static int probe_trace_event__set_name(struct probe_trace_event
*tev
,
2466 struct perf_probe_event
*pev
,
2467 struct strlist
*namelist
,
2470 const char *event
, *group
;
2477 if (pev
->point
.function
&&
2478 (strncmp(pev
->point
.function
, "0x", 2) != 0) &&
2479 !strisglob(pev
->point
.function
))
2480 event
= pev
->point
.function
;
2482 event
= tev
->point
.realname
;
2486 group
= PERFPROBE_GROUP
;
2488 /* Get an unused new event name */
2489 ret
= get_new_event_name(buf
, 64, event
,
2490 namelist
, allow_suffix
);
2496 tev
->event
= strdup(event
);
2497 tev
->group
= strdup(group
);
2498 if (tev
->event
== NULL
|| tev
->group
== NULL
)
2501 /* Add added event name to namelist */
2502 strlist__add(namelist
, event
);
2506 static int __add_probe_trace_events(struct perf_probe_event
*pev
,
2507 struct probe_trace_event
*tevs
,
2508 int ntevs
, bool allow_suffix
)
2511 struct probe_trace_event
*tev
= NULL
;
2512 struct strlist
*namelist
;
2514 fd
= probe_file__open(PF_FL_RW
| (pev
->uprobes
? PF_FL_UPROBE
: 0));
2518 /* Get current event names */
2519 namelist
= probe_file__get_namelist(fd
);
2521 pr_debug("Failed to get current event list.\n");
2527 for (i
= 0; i
< ntevs
; i
++) {
2529 /* Skip if the symbol is out of .text or blacklisted */
2530 if (!tev
->point
.symbol
)
2533 /* Set new name for tev (and update namelist) */
2534 ret
= probe_trace_event__set_name(tev
, pev
, namelist
,
2539 ret
= probe_file__add_event(fd
, tev
);
2544 * Probes after the first probe which comes from same
2545 * user input are always allowed to add suffix, because
2546 * there might be several addresses corresponding to
2549 allow_suffix
= true;
2551 if (ret
== -EINVAL
&& pev
->uprobes
)
2552 warn_uprobe_event_compat(tev
);
2554 strlist__delete(namelist
);
2560 static int find_probe_functions(struct map
*map
, char *name
,
2561 struct symbol
**syms
)
2565 struct rb_node
*tmp
;
2567 if (map__load(map
, NULL
) < 0)
2570 map__for_each_symbol(map
, sym
, tmp
) {
2571 if (strglobmatch(sym
->name
, name
)) {
2573 if (syms
&& found
< probe_conf
.max_probes
)
2574 syms
[found
- 1] = sym
;
2581 void __weak
arch__fix_tev_from_maps(struct perf_probe_event
*pev __maybe_unused
,
2582 struct probe_trace_event
*tev __maybe_unused
,
2583 struct map
*map __maybe_unused
,
2584 struct symbol
*sym __maybe_unused
) { }
2587 * Find probe function addresses from map.
2588 * Return an error or the number of found probe_trace_event
2590 static int find_probe_trace_events_from_map(struct perf_probe_event
*pev
,
2591 struct probe_trace_event
**tevs
)
2593 struct map
*map
= NULL
;
2594 struct ref_reloc_sym
*reloc_sym
= NULL
;
2596 struct symbol
**syms
= NULL
;
2597 struct probe_trace_event
*tev
;
2598 struct perf_probe_point
*pp
= &pev
->point
;
2599 struct probe_trace_point
*tp
;
2600 int num_matched_functions
;
2601 int ret
, i
, j
, skipped
= 0;
2604 map
= get_target_map(pev
->target
, pev
->uprobes
);
2610 syms
= malloc(sizeof(struct symbol
*) * probe_conf
.max_probes
);
2617 * Load matched symbols: Since the different local symbols may have
2618 * same name but different addresses, this lists all the symbols.
2620 num_matched_functions
= find_probe_functions(map
, pp
->function
, syms
);
2621 if (num_matched_functions
== 0) {
2622 pr_err("Failed to find symbol %s in %s\n", pp
->function
,
2623 pev
->target
? : "kernel");
2626 } else if (num_matched_functions
> probe_conf
.max_probes
) {
2627 pr_err("Too many functions matched in %s\n",
2628 pev
->target
? : "kernel");
2633 /* Note that the symbols in the kmodule are not relocated */
2634 if (!pev
->uprobes
&& !pp
->retprobe
&& !pev
->target
) {
2635 reloc_sym
= kernel_get_ref_reloc_sym();
2637 pr_warning("Relocated base symbol is not found!\n");
2643 /* Setup result trace-probe-events */
2644 *tevs
= zalloc(sizeof(*tev
) * num_matched_functions
);
2652 for (j
= 0; j
< num_matched_functions
; j
++) {
2655 tev
= (*tevs
) + ret
;
2657 if (ret
== num_matched_functions
) {
2658 pr_warning("Too many symbols are listed. Skip it.\n");
2663 if (pp
->offset
> sym
->end
- sym
->start
) {
2664 pr_warning("Offset %ld is bigger than the size of %s\n",
2665 pp
->offset
, sym
->name
);
2669 /* Add one probe point */
2670 tp
->address
= map
->unmap_ip(map
, sym
->start
) + pp
->offset
;
2672 /* Check the kprobe (not in module) is within .text */
2673 if (!pev
->uprobes
&& !pev
->target
&&
2674 kprobe_warn_out_range(sym
->name
, tp
->address
)) {
2675 tp
->symbol
= NULL
; /* Skip it */
2677 } else if (reloc_sym
) {
2678 tp
->symbol
= strdup_or_goto(reloc_sym
->name
, nomem_out
);
2679 tp
->offset
= tp
->address
- reloc_sym
->addr
;
2681 tp
->symbol
= strdup_or_goto(sym
->name
, nomem_out
);
2682 tp
->offset
= pp
->offset
;
2684 tp
->realname
= strdup_or_goto(sym
->name
, nomem_out
);
2686 tp
->retprobe
= pp
->retprobe
;
2689 tev
->point
.module
= strdup_or_goto(pev
->target
,
2692 mod_name
= find_module_name(pev
->target
);
2694 strdup(mod_name
? mod_name
: pev
->target
);
2696 if (!tev
->point
.module
)
2700 tev
->uprobes
= pev
->uprobes
;
2701 tev
->nargs
= pev
->nargs
;
2703 tev
->args
= zalloc(sizeof(struct probe_trace_arg
) *
2705 if (tev
->args
== NULL
)
2708 for (i
= 0; i
< tev
->nargs
; i
++) {
2709 if (pev
->args
[i
].name
)
2711 strdup_or_goto(pev
->args
[i
].name
,
2714 tev
->args
[i
].value
= strdup_or_goto(pev
->args
[i
].var
,
2716 if (pev
->args
[i
].type
)
2718 strdup_or_goto(pev
->args
[i
].type
,
2721 arch__fix_tev_from_maps(pev
, tev
, map
, sym
);
2723 if (ret
== skipped
) {
2729 put_target_map(map
, pev
->uprobes
);
2736 clear_probe_trace_events(*tevs
, num_matched_functions
);
2741 static int try_to_find_absolute_address(struct perf_probe_event
*pev
,
2742 struct probe_trace_event
**tevs
)
2744 struct perf_probe_point
*pp
= &pev
->point
;
2745 struct probe_trace_event
*tev
;
2746 struct probe_trace_point
*tp
;
2749 if (!(pev
->point
.function
&& !strncmp(pev
->point
.function
, "0x", 2)))
2751 if (perf_probe_event_need_dwarf(pev
))
2755 * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at
2758 * Only one tev can be generated by this.
2760 *tevs
= zalloc(sizeof(*tev
));
2768 * Don't use tp->offset, use address directly, because
2769 * in synthesize_probe_trace_command() address cannot be
2772 tp
->address
= pev
->point
.abs_address
;
2773 tp
->retprobe
= pp
->retprobe
;
2774 tev
->uprobes
= pev
->uprobes
;
2778 * Give it a '0x' leading symbol name.
2779 * In __add_probe_trace_events, a NULL symbol is interpreted as
2782 if (asprintf(&tp
->symbol
, "0x%lx", tp
->address
) < 0)
2785 /* For kprobe, check range */
2786 if ((!tev
->uprobes
) &&
2787 (kprobe_warn_out_range(tev
->point
.symbol
,
2788 tev
->point
.address
))) {
2793 if (asprintf(&tp
->realname
, "abs_%lx", tp
->address
) < 0)
2797 tp
->module
= strdup(pev
->target
);
2803 tev
->group
= strdup(pev
->group
);
2809 tev
->event
= strdup(pev
->event
);
2814 tev
->nargs
= pev
->nargs
;
2815 tev
->args
= zalloc(sizeof(struct probe_trace_arg
) * tev
->nargs
);
2820 for (i
= 0; i
< tev
->nargs
; i
++)
2821 copy_to_probe_trace_arg(&tev
->args
[i
], &pev
->args
[i
]);
2827 clear_probe_trace_events(*tevs
, 1);
2833 bool __weak
arch__prefers_symtab(void) { return false; }
2835 static int convert_to_probe_trace_events(struct perf_probe_event
*pev
,
2836 struct probe_trace_event
**tevs
)
2841 /* Set group name if not given */
2842 if (!pev
->uprobes
) {
2843 pev
->group
= strdup(PERFPROBE_GROUP
);
2844 ret
= pev
->group
? 0 : -ENOMEM
;
2846 ret
= convert_exec_to_group(pev
->target
, &pev
->group
);
2848 pr_warning("Failed to make a group name.\n");
2853 ret
= try_to_find_absolute_address(pev
, tevs
);
2857 if (arch__prefers_symtab() && !perf_probe_event_need_dwarf(pev
)) {
2858 ret
= find_probe_trace_events_from_map(pev
, tevs
);
2860 return ret
; /* Found in symbol table */
2863 /* Convert perf_probe_event with debuginfo */
2864 ret
= try_to_find_probe_trace_events(pev
, tevs
);
2866 return ret
; /* Found in debuginfo or got an error */
2868 return find_probe_trace_events_from_map(pev
, tevs
);
2871 int convert_perf_probe_events(struct perf_probe_event
*pevs
, int npevs
)
2875 /* Loop 1: convert all events */
2876 for (i
= 0; i
< npevs
; i
++) {
2877 /* Init kprobe blacklist if needed */
2878 if (!pevs
[i
].uprobes
)
2879 kprobe_blacklist__init();
2880 /* Convert with or without debuginfo */
2881 ret
= convert_to_probe_trace_events(&pevs
[i
], &pevs
[i
].tevs
);
2884 pevs
[i
].ntevs
= ret
;
2886 /* This just release blacklist only if allocated */
2887 kprobe_blacklist__release();
2892 int apply_perf_probe_events(struct perf_probe_event
*pevs
, int npevs
)
2896 /* Loop 2: add all events */
2897 for (i
= 0; i
< npevs
; i
++) {
2898 ret
= __add_probe_trace_events(&pevs
[i
], pevs
[i
].tevs
,
2900 probe_conf
.force_add
);
2907 void cleanup_perf_probe_events(struct perf_probe_event
*pevs
, int npevs
)
2911 /* Loop 3: cleanup and free trace events */
2912 for (i
= 0; i
< npevs
; i
++) {
2913 for (j
= 0; j
< pevs
[i
].ntevs
; j
++)
2914 clear_probe_trace_event(&pevs
[i
].tevs
[j
]);
2915 zfree(&pevs
[i
].tevs
);
2917 clear_perf_probe_event(&pevs
[i
]);
2921 int add_perf_probe_events(struct perf_probe_event
*pevs
, int npevs
)
2925 ret
= init_probe_symbol_maps(pevs
->uprobes
);
2929 ret
= convert_perf_probe_events(pevs
, npevs
);
2931 ret
= apply_perf_probe_events(pevs
, npevs
);
2933 cleanup_perf_probe_events(pevs
, npevs
);
2935 exit_probe_symbol_maps();
2939 int del_perf_probe_events(struct strfilter
*filter
)
2941 int ret
, ret2
, ufd
= -1, kfd
= -1;
2942 char *str
= strfilter__string(filter
);
2947 /* Get current event names */
2948 ret
= probe_file__open_both(&kfd
, &ufd
, PF_FL_RW
);
2952 ret
= probe_file__del_events(kfd
, filter
);
2953 if (ret
< 0 && ret
!= -ENOENT
)
2956 ret2
= probe_file__del_events(ufd
, filter
);
2957 if (ret2
< 0 && ret2
!= -ENOENT
) {
2974 /* TODO: don't use a global variable for filter ... */
2975 static struct strfilter
*available_func_filter
;
2978 * If a symbol corresponds to a function with global binding and
2979 * matches filter return 0. For all others return 1.
2981 static int filter_available_functions(struct map
*map __maybe_unused
,
2984 if (strfilter__compare(available_func_filter
, sym
->name
))
2989 int show_available_funcs(const char *target
, struct strfilter
*_filter
,
2995 ret
= init_probe_symbol_maps(user
);
2999 /* Get a symbol map */
3001 map
= dso__new_map(target
);
3003 map
= kernel_get_module_map(target
);
3005 pr_err("Failed to get a map for %s\n", (target
) ? : "kernel");
3009 /* Load symbols with given filter */
3010 available_func_filter
= _filter
;
3011 if (map__load(map
, filter_available_functions
)) {
3012 pr_err("Failed to load symbols in %s\n", (target
) ? : "kernel");
3015 if (!dso__sorted_by_name(map
->dso
, map
->type
))
3016 dso__sort_by_name(map
->dso
, map
->type
);
3018 /* Show all (filtered) symbols */
3020 dso__fprintf_symbols_by_name(map
->dso
, map
->type
, stdout
);
3025 exit_probe_symbol_maps();
3030 int copy_to_probe_trace_arg(struct probe_trace_arg
*tvar
,
3031 struct perf_probe_arg
*pvar
)
3033 tvar
->value
= strdup(pvar
->var
);
3034 if (tvar
->value
== NULL
)
3037 tvar
->type
= strdup(pvar
->type
);
3038 if (tvar
->type
== NULL
)
3042 tvar
->name
= strdup(pvar
->name
);
3043 if (tvar
->name
== NULL
)