perf symbols: Do lazy symtab loading for the kernel & modules too
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>
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Ingo Molnar
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@ -115,10 +115,13 @@ typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
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void map__init(struct map *self, u64 start, u64 end, u64 pgoff,
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struct dso *dso);
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struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen);
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void map__delete(struct map *self);
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struct map *map__clone(struct map *self);
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int map__overlap(struct map *l, struct map *r);
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size_t map__fprintf(struct map *self, FILE *fp);
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struct symbol *map__find_symbol(struct map *self, u64 ip, symbol_filter_t filter);
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void map__fixup_start(struct map *self);
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void map__fixup_end(struct map *self);
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int event__synthesize_thread(pid_t pid, int (*process)(event_t *event));
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void event__synthesize_threads(int (*process)(event_t *event));
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