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perf top: Use address pattern in lookup_sym_source 

Because we may have aliases, like __GI___strcoll_l in
/lib64/libc-2.10.2.so that appears in objdump as:

$ objdump --start-address=0x0000003715a86420 \
           --stop-address=0x0000003715a872dc -dS /lib64/libc-2.10.2.so

0000003715a86420 <__strcoll_l>:
  3715a86420:	55                   	push   %rbp
  3715a86421:	48 89 e5             	mov    %rsp,%rbp
  3715a86424:	41 57                	push   %r15
[root@doppio linux-2.6-tip]#

So look for the address exactly at the start of the line instead
so that annotation can work for in these cases.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Kirill Smelkov <kirr@landau.phys.spbu.ru>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1265550376-12665-2-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-02-07 11:46:16 -02:00 committed by Ingo Molnar
parent ee11b90b12
commit 5f48536436
1 changed files with 8 additions and 7 deletions
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15
tools/perf/builtin-top.c
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@ -202,10 +202,9 @@ static void parse_source(struct sym_entry *syme)
len = sym->end - sym->start;
sprintf(command,
"objdump --start-address=0x%016Lx "
"--stop-address=0x%016Lx -dS %s",
map__rip_2objdump(map, sym->start),
map__rip_2objdump(map, sym->end), path);
"objdump --start-address=%#0*Lx --stop-address=%#0*Lx -dS %s",
BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
file = popen(command, "r");
if (!file)
@ -292,13 +291,15 @@ static void lookup_sym_source(struct sym_entry *syme)
{
struct symbol *symbol = sym_entry__symbol(syme);
struct source_line *line;
char pattern[PATH_MAX];
const size_t pattern_len = BITS_PER_LONG / 4 + 2;
char pattern[pattern_len + 1];
sprintf(pattern, "<%s>:", symbol->name);
sprintf(pattern, "%0*Lx <", BITS_PER_LONG / 4,
map__rip_2objdump(syme->map, symbol->start));
pthread_mutex_lock(&syme->src->lock);
for (line = syme->src->lines; line; line = line->next) {
if (strstr(line->line, pattern)) {
if (memcmp(line->line, pattern, pattern_len) == 0) {
syme->src->source = line;
break;
}