perf symbols: Rename kthreads to kmaps, using another abstraction for it
Using a struct thread instance just to hold the kernel space maps
(vmlinux + modules) is overkill and confuses people trying to
understand the perf symbols abstractions.
The kernel maps are really present in all threads, i.e. the kernel
is a library, not a separate thread.
So introduce the 'map_groups' abstraction and use it for the kernel
maps, now in the kmaps global variable.
It, in turn, will move, together with the threads list to the
perf_file abstraction, so that we can support multiple perf_file
instances, needed by perf diff.
Brainstormed-with: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Eduardo Habkost <ehabkost@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: <1260550239-5372-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 4dcecafa..ba0de90 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -254,13 +254,14 @@
struct addr_location *al,
symbol_filter_t filter)
{
- struct thread *thread = al->thread = self;
+ struct map_groups *mg = &self->mg;
+ al->thread = self;
al->addr = addr;
if (cpumode & PERF_RECORD_MISC_KERNEL) {
al->level = 'k';
- thread = kthread;
+ mg = kmaps;
} else if (cpumode & PERF_RECORD_MISC_USER)
al->level = '.';
else {
@@ -270,7 +271,7 @@
return;
}
try_again:
- al->map = thread__find_map(thread, type, al->addr);
+ al->map = map_groups__find(mg, type, al->addr);
if (al->map == NULL) {
/*
* If this is outside of all known maps, and is a negative
@@ -281,8 +282,8 @@
* "[vdso]" dso, but for now lets use the old trick of looking
* in the whole kernel symbol list.
*/
- if ((long long)al->addr < 0 && thread != kthread) {
- thread = kthread;
+ if ((long long)al->addr < 0 && mg != kmaps) {
+ mg = kmaps;
goto try_again;
}
al->sym = NULL;