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perf report: Fix kernel symbol resolution

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kallsyms have just the symbol start, so we need to read two lines
to get the len.

[ Impact: fix incorrect kernel symbol display in perf report ]

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-05-26 11:14:27 -03:00 committed by Ingo Molnar
parent f17e04afaf
commit 59d81029b6
1 changed files with 21 additions and 5 deletions
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26
Documentation/perf_counter/builtin-report.c
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@ -360,9 +360,17 @@ static int load_kallsyms(void)
char *line = NULL;
size_t n;
if (getline(&line, &n, file) < 0 || !line)
goto out_delete_dso;
unsigned long long previous_start;
char c, previous_symbf[4096];
if (sscanf(line, "%llx %c %s", &previous_start, &c, previous_symbf) != 3)
goto out_delete_line;
while (!feof(file)) {
unsigned long long start;
char c, symbf[4096];
char symbf[4096];
if (getline(&line, &n, file) < 0)
break;
@ -371,12 +379,18 @@ static int load_kallsyms(void)
goto out_delete_dso;
if (sscanf(line, "%llx %c %s", &start, &c, symbf) == 3) {
struct symbol *sym = symbol__new(start, 0x1000000, symbf);
if (start > previous_start) {
struct symbol *sym = symbol__new(previous_start,
start - previous_start,
previous_symbf);
if (sym == NULL)
goto out_delete_dso;
if (sym == NULL)
goto out_delete_dso;
dso__insert_symbol(kernel_dso, sym);
dso__insert_symbol(kernel_dso, sym);
previous_start = start;
strcpy(previous_symbf, symbf);
}
}
}
@ -385,6 +399,8 @@ static int load_kallsyms(void)
fclose(file);
return 0;
out_delete_line:
free(line);
out_delete_dso:
dso__delete(kernel_dso);
return -1;