Commit 85e00b55 authored by Jovi Zhang's avatar Jovi Zhang Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarDavidlohr Bueso <dave@gnu.org>
Cc: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: default avatarJovi Zhang <bookjovi@gmail.com>
LKML-Reference: AANLkTi=9Cn=R8SPMCRp5z+gEjXbaBHeb-AaOtRbuwwcn@mail.gmail.com
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent da34634f

tools/perf/util/symbol.c

+7 −0
Original line number Diff line number Diff line
@@ -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)

tools/perf/util/symbol.h

+2 −1
Original line number Diff line number Diff line
@@ -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;

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