mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 09:50:04 +00:00
perf probe: Add --funcs to show available functions in symtab
Add --funcs to show available functions in symtab. Originally this feature came from Srikar's uprobes patches ( http://lkml.org/lkml/2010/8/27/244 ) e.g. ... __ablkcipher_walk_complete __absent_pages_in_range __account_scheduler_latency __add_pages __alloc_pages_nodemask __alloc_percpu __alloc_reserved_percpu __alloc_skb __alloc_workqueue_key __any_online_cpu __ata_ehi_push_desc ... This also supports symbols in module, e.g. ... cleanup_module cpuid_maxphyaddr emulate_clts emulate_instruction emulate_int_real emulate_invlpg emulator_get_dr emulator_set_dr emulator_task_switch emulator_write_emulated emulator_write_phys fx_init ... Original-patch-from: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Franck Bui-Huu <fbuihuu@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20110113124611.22426.10835.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> [ committer note: Add missing elf.h for STB_GLOBAL that broke a RHEL4 build ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
5069ed86be
commit
e80711ca85
4 changed files with 99 additions and 3 deletions
|
@ -73,6 +73,10 @@ OPTIONS
|
|||
(Only for --vars) Show external defined variables in addition to local
|
||||
variables.
|
||||
|
||||
-F::
|
||||
--funcs::
|
||||
Show available functions in given module or kernel.
|
||||
|
||||
-f::
|
||||
--force::
|
||||
Forcibly add events with existing name.
|
||||
|
|
|
@ -52,6 +52,7 @@ static struct {
|
|||
bool show_lines;
|
||||
bool show_vars;
|
||||
bool show_ext_vars;
|
||||
bool show_funcs;
|
||||
bool mod_events;
|
||||
int nevents;
|
||||
struct perf_probe_event events[MAX_PROBES];
|
||||
|
@ -221,6 +222,8 @@ static const struct option options[] = {
|
|||
OPT__DRY_RUN(&probe_event_dry_run),
|
||||
OPT_INTEGER('\0', "max-probes", ¶ms.max_probe_points,
|
||||
"Set how many probe points can be found for a probe."),
|
||||
OPT_BOOLEAN('F', "funcs", ¶ms.show_funcs,
|
||||
"Show potential probe-able functions."),
|
||||
OPT_END()
|
||||
};
|
||||
|
||||
|
@ -246,7 +249,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
|
|||
params.max_probe_points = MAX_PROBES;
|
||||
|
||||
if ((!params.nevents && !params.dellist && !params.list_events &&
|
||||
!params.show_lines))
|
||||
!params.show_lines && !params.show_funcs))
|
||||
usage_with_options(probe_usage, options);
|
||||
|
||||
/*
|
||||
|
@ -267,12 +270,36 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
|
|||
pr_err(" Error: Don't use --list with --vars.\n");
|
||||
usage_with_options(probe_usage, options);
|
||||
}
|
||||
if (params.show_funcs) {
|
||||
pr_err(" Error: Don't use --list with --funcs.\n");
|
||||
usage_with_options(probe_usage, options);
|
||||
}
|
||||
ret = show_perf_probe_events();
|
||||
if (ret < 0)
|
||||
pr_err(" Error: Failed to show event list. (%d)\n",
|
||||
ret);
|
||||
return ret;
|
||||
}
|
||||
if (params.show_funcs) {
|
||||
if (params.nevents != 0 || params.dellist) {
|
||||
pr_err(" Error: Don't use --funcs with"
|
||||
" --add/--del.\n");
|
||||
usage_with_options(probe_usage, options);
|
||||
}
|
||||
if (params.show_lines) {
|
||||
pr_err(" Error: Don't use --funcs with --line.\n");
|
||||
usage_with_options(probe_usage, options);
|
||||
}
|
||||
if (params.show_vars) {
|
||||
pr_err(" Error: Don't use --funcs with --vars.\n");
|
||||
usage_with_options(probe_usage, options);
|
||||
}
|
||||
ret = show_available_funcs(params.target_module);
|
||||
if (ret < 0)
|
||||
pr_err(" Error: Failed to show functions."
|
||||
" (%d)\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef DWARF_SUPPORT
|
||||
if (params.show_lines) {
|
||||
|
|
|
@ -31,6 +31,7 @@
|
|||
#include <string.h>
|
||||
#include <stdarg.h>
|
||||
#include <limits.h>
|
||||
#include <elf.h>
|
||||
|
||||
#undef _GNU_SOURCE
|
||||
#include "util.h"
|
||||
|
@ -111,7 +112,25 @@ static struct symbol *__find_kernel_function_by_name(const char *name,
|
|||
NULL);
|
||||
}
|
||||
|
||||
const char *kernel_get_module_path(const char *module)
|
||||
static struct map *kernel_get_module_map(const char *module)
|
||||
{
|
||||
struct rb_node *nd;
|
||||
struct map_groups *grp = &machine.kmaps;
|
||||
|
||||
if (!module)
|
||||
module = "kernel";
|
||||
|
||||
for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) {
|
||||
struct map *pos = rb_entry(nd, struct map, rb_node);
|
||||
if (strncmp(pos->dso->short_name + 1, module,
|
||||
pos->dso->short_name_len - 2) == 0) {
|
||||
return pos;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct dso *kernel_get_module_dso(const char *module)
|
||||
{
|
||||
struct dso *dso;
|
||||
struct map *map;
|
||||
|
@ -141,7 +160,13 @@ const char *kernel_get_module_path(const char *module)
|
|||
}
|
||||
}
|
||||
found:
|
||||
return dso->long_name;
|
||||
return dso;
|
||||
}
|
||||
|
||||
const char *kernel_get_module_path(const char *module)
|
||||
{
|
||||
struct dso *dso = kernel_get_module_dso(module);
|
||||
return (dso) ? dso->long_name : NULL;
|
||||
}
|
||||
|
||||
#ifdef DWARF_SUPPORT
|
||||
|
@ -1913,3 +1938,42 @@ int del_perf_probe_events(struct strlist *dellist)
|
|||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* If a symbol corresponds to a function with global binding return 0.
|
||||
* For all others return 1.
|
||||
*/
|
||||
static int filter_non_global_functions(struct map *map __unused,
|
||||
struct symbol *sym)
|
||||
{
|
||||
if (sym->binding != STB_GLOBAL)
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int show_available_funcs(const char *module)
|
||||
{
|
||||
struct map *map;
|
||||
int ret;
|
||||
|
||||
setup_pager();
|
||||
|
||||
ret = init_vmlinux();
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
map = kernel_get_module_map(module);
|
||||
if (!map) {
|
||||
pr_err("Failed to find %s map.\n", (module) ? : "kernel");
|
||||
return -EINVAL;
|
||||
}
|
||||
if (map__load(map, filter_non_global_functions)) {
|
||||
pr_err("Failed to load map.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
if (!dso__sorted_by_name(map->dso, map->type))
|
||||
dso__sort_by_name(map->dso, map->type);
|
||||
|
||||
dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
|
||||
return 0;
|
||||
}
|
||||
|
|
|
@ -127,6 +127,7 @@ extern int show_line_range(struct line_range *lr, const char *module);
|
|||
extern int show_available_vars(struct perf_probe_event *pevs, int npevs,
|
||||
int max_probe_points, const char *module,
|
||||
bool externs);
|
||||
extern int show_available_funcs(const char *module);
|
||||
|
||||
|
||||
/* Maximum index number of event-name postfix */
|
||||
|
|
Loading…
Reference in a new issue