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perf symbols: Do lazy symtab loading for the kernel & modules too

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Just like we do with the other DSOs. This also simplifies the
kernel_maps setup process, now all that the tools need to do is
to call kernel_maps__init and the maps for the modules and
kernel will be created, then, later, when
kernel_maps__find_symbol() is used, it will also call
maps__find_symbol that already checks if the symtab was loaded,
loading it if needed.

Now if one does 'perf top --hide_kernel_symbols' we won't pay
the price of loading the (many) symbols in /proc/kallsyms or
vmlinux.

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: <1258757489-5978-4-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo
2009-11-20 20:51:27 -02:00
committed by Ingo Molnar
parent 78075caad9
commit c338aee853
10 changed files with 109 additions and 161 deletions
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3
tools/perf/util/thread.h
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@@ -26,7 +26,8 @@ size_t threads__fprintf(FILE *fp);
void maps__insert(struct rb_root *maps, struct map *map);
struct map *maps__find(struct rb_root *maps, u64 ip);
struct symbol *kernel_maps__find_symbol(const u64 ip, struct map **mapp);
struct symbol *kernel_maps__find_symbol(const u64 ip, struct map **mapp,
symbol_filter_t filter);
struct map *kernel_maps__find_by_dso_name(const char *name);
static inline struct map *thread__find_map(struct thread *self, u64 ip)