mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-20 16:30:53 +00:00
f1dfa0b1c1
Example:
{
u64 addr = strtoull(sym_filter, NULL, 16);
struct map *map = map_groups__find(kmaps, MAP__VARIABLE, addr);
if (map == NULL)
pr_err("couldn't find map!\n");
else {
struct symbol *sym = map__find_symbol(map, addr, NULL);
if (sym == NULL)
pr_err("couldn't find addr!\n");
else
pr_info("addr %#Lx is in %s global var\n", addr, sym->name);
}
exit(0);
}
Added just after symbol__init() call in 'perf top', then:
{
u64 addr = strtoull(sym_filter, NULL, 16);
struct map *map = map_groups__find(kmaps, MAP__VARIABLE, addr);
if (map == NULL)
pr_err("couldn't find map!\n");
else {
struct symbol *sym = map__find_symbol(map, addr, NULL);
if (sym == NULL)
pr_err("couldn't find addr!\n");
else
pr_info("addr %#Lx is in %s global var\n", addr, sym->name);
}
exit(0);
}
[root@doppio linux-2.6-tip]# grep ' [dD] ' /proc/kallsyms | grep ' sched'
ffffffff817827d8 d sched_nr_latency
ffffffff81782ce0 d sched_domains_mutex
ffffffff8178c070 d schedstr.22423
ffffffff817909a0 d sched_register_mutex
ffffffff81823490 d sched_feat_names
ffffffff81823558 d scheduler_running
ffffffff818235b8 d sched_clock_running
ffffffff818235bc D sched_clock_stable
ffffffff81824f00 d sched_switch_trace
[root@doppio linux-2.6-tip]# perf top -s 0xffffffff817827d9
addr 0xffffffff817827d9 is in sched_nr_latency global var
[root@doppio linux-2.6-tip]# perf top -s ffffffff81782ce0
addr 0xffffffff81782ce0 is in sched_domains_mutex global var
[root@doppio linux-2.6-tip]#
[root@doppio linux-2.6-tip]# perf top -s ffffffff81782ce0 --vmlinux OFF
The file OFF cannot be used, trying to use /proc/kallsyms...addr 0xffffffff81782ce0 is in sched_domains_mutex global var
[root@doppio linux-2.6-tip]# perf top -s ffffffff818235bc --vmlinux OFF
The file OFF cannot be used, trying to use /proc/kallsyms...addr 0xffffffff818235bc is in sched_clock_stable global var
[root@doppio linux-2.6-tip]#
So it works with both /proc/kallsyms and with ELF symtabs, either
the one on the vmlinux explicitely passed via --vmlinux or in one
in the vmlinux_path that matches the buildid for the running kernel
or the one found in the buildid header section in a perf.data file.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260550239-5372-4-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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|---|---|---|
| .. | ||
| include | ||
| abspath.c | ||
| alias.c | ||
| cache.h | ||
| callchain.c | ||
| callchain.h | ||
| color.c | ||
| color.h | ||
| config.c | ||
| ctype.c | ||
| data_map.c | ||
| data_map.h | ||
| debug.c | ||
| debug.h | ||
| debugfs.c | ||
| debugfs.h | ||
| environment.c | ||
| event.c | ||
| event.h | ||
| exec_cmd.c | ||
| exec_cmd.h | ||
| generate-cmdlist.sh | ||
| header.c | ||
| header.h | ||
| help.c | ||
| help.h | ||
| hist.c | ||
| hist.h | ||
| levenshtein.c | ||
| levenshtein.h | ||
| map.c | ||
| pager.c | ||
| parse-events.c | ||
| parse-events.h | ||
| parse-options.c | ||
| parse-options.h | ||
| path.c | ||
| PERF-VERSION-GEN | ||
| probe-event.c | ||
| probe-event.h | ||
| probe-finder.c | ||
| probe-finder.h | ||
| quote.c | ||
| quote.h | ||
| run-command.c | ||
| run-command.h | ||
| sigchain.c | ||
| sigchain.h | ||
| sort.c | ||
| sort.h | ||
| strbuf.c | ||
| strbuf.h | ||
| string.c | ||
| string.h | ||
| strlist.c | ||
| strlist.h | ||
| svghelper.c | ||
| svghelper.h | ||
| symbol.c | ||
| symbol.h | ||
| thread.c | ||
| thread.h | ||
| trace-event-info.c | ||
| trace-event-parse.c | ||
| trace-event-perl.c | ||
| trace-event-perl.h | ||
| trace-event-read.c | ||
| trace-event.h | ||
| types.h | ||
| usage.c | ||
| util.h | ||
| values.c | ||
| values.h | ||
| wrapper.c | ||