Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-25 05:32:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

perf symbols: Fix up map end too on modular kernels with no modules installed

Browse Source 
In 2161db9 we stopped failing when not finding modules when
asked too, but then the kernel maps (just one, for vmlinux)
wasn't having its ->end field correctly set up, so symbols were
not being found for the vmlinux map because its range was 0-0.

Reported-by: Ingo Molnar <mingo@elte.hu>
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: <1266702793-29434-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-02-20 19:53:13 -02:00 committed by Ingo Molnar
parent f7e7ee3675
commit 10fe12ef63
2 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/util/event.c
View File

@ -379,6 +379,12 @@ int event__process_mmap(event_t *self, struct perf_session *session)
session->vmlinux_maps[MAP__FUNCTION]->start = self->mmap.start;
session->vmlinux_maps[MAP__FUNCTION]->end = self->mmap.start + self->mmap.len;
/*
* Be a bit paranoid here, some perf.data file came with
* a zero sized synthesized MMAP event for the kernel.
*/
if (session->vmlinux_maps[MAP__FUNCTION]->end == 0)
session->vmlinux_maps[MAP__FUNCTION]->end = ~0UL;
perf_session__set_kallsyms_ref_reloc_sym(session, symbol_name,
self->mmap.pgoff);

2
tools/perf/util/symbol.c
View File

@ -1937,7 +1937,7 @@ int map_groups__create_kernel_maps(struct map_groups *self,
return -1;
if (symbol_conf.use_modules && map_groups__create_modules(self) < 0)
return 0;
pr_debug("Problems creating module maps, continuing anyway...\n");
/*
* Now that we have all the maps created, just set the ->end of them:
*/