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perf symbols: Fix multiple initialization of symbol system 

By returning immediately if it was already initialized, do it as well at
symbol__exit, refusing multiple deinitializations.

This fixes problems in the kmem, sched and timechart commands.

Reported-by: Davidlohr Bueso <dave@gnu.org>
Cc: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: Jovi Zhang <bookjovi@gmail.com>
LKML-Reference: AANLkTi=9Cn=R8SPMCRp5z+gEjXbaBHeb-AaOtRbuwwcn@mail.gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
wifi-calibration
Jovi Zhang 2010-09-09 13:30:59 -03:00 committed by Arnaldo Carvalho de Melo
parent da34634fd3
commit 85e00b5551
2 changed files with 9 additions and 1 deletions
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7
tools/perf/util/symbol.c
View File

@ -2268,6 +2268,9 @@ static int setup_list(struct strlist **list, const char *list_str,
int symbol__init(void)
{
if (symbol_conf.initialized)
return 0;
elf_version(EV_CURRENT);
if (symbol_conf.sort_by_name)
symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
@ -2293,6 +2296,7 @@ int symbol__init(void)
symbol_conf.sym_list_str, "symbol") < 0)
goto out_free_comm_list;
symbol_conf.initialized = true;
return 0;
out_free_dso_list:
@ -2304,11 +2308,14 @@ out_free_comm_list:
void symbol__exit(void)
{
if (!symbol_conf.initialized)
return;
strlist__delete(symbol_conf.sym_list);
strlist__delete(symbol_conf.dso_list);
strlist__delete(symbol_conf.comm_list);
vmlinux_path__exit();
symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
symbol_conf.initialized = false;
}
int machines__create_kernel_maps(struct rb_root *self, pid_t pid)

3
tools/perf/util/symbol.h
View File

@ -69,7 +69,8 @@ struct symbol_conf {
show_nr_samples,
use_callchain,
exclude_other,
show_cpu_utilization;
show_cpu_utilization,
initialized;
const char *vmlinux_name,
*source_prefix,
*field_sep;