From 82151520938ec79e5e3adb7e61977f002031c38c Mon Sep 17 00:00:00 2001 From: Cody P Schafer Date: Fri, 10 Aug 2012 15:22:48 -0700 Subject: [PATCH] perf symbols: Remove unused 'end' arg in kallsyms parse cb kallsyms__parse() takes a callback that is called on every discovered symbol. As /proc/kallsyms does not supply symbol sizes, the callback was simply called with end=start, faking the symbol size to 1. All of the callbacks (there are 2) used in calls to kallsyms__parse() are _only_ used as callbacks for kallsyms__parse(). Given that kallsyms__parse() lacks real information about what end/length should be, don't make up a length in kallsyms__parse(). Instead have the callbacks handle guessing the length. Also relocate a comment regarding symbol creation to the callback which does symbol creation (kallsyms__parse() is not in general used to create symbols). Signed-off-by: Cody P Schafer Cc: David Hansen Cc: Ingo Molnar Cc: Matt Hellsley Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Sukadev Bhattiprolu Link: http://lkml.kernel.org/r/1344637382-22789-3-git-send-email-cody@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/event.c | 2 +- tools/perf/util/symbol.c | 21 ++++++++++----------- tools/perf/util/symbol.h | 2 +- 3 files changed, 12 insertions(+), 13 deletions(-) diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 2a6f33cd888c..3a0f1a5da91c 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -412,7 +412,7 @@ struct process_symbol_args { }; static int find_symbol_cb(void *arg, const char *name, char type, - u64 start, u64 end __used) + u64 start) { struct process_symbol_args *args = arg; diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 9f181a86f3b2..21270029f07b 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -563,7 +563,7 @@ size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) int kallsyms__parse(const char *filename, void *arg, int (*process_symbol)(void *arg, const char *name, - char type, u64 start, u64 end)) + char type, u64 start)) { char *line = NULL; size_t n; @@ -603,13 +603,8 @@ int kallsyms__parse(const char *filename, void *arg, break; } - /* - * module symbols are not sorted so we add all - * symbols, setting length to 1, and rely on - * symbols__fixup_end() to fix it up. - */ err = process_symbol(arg, symbol_name, - symbol_type, start, start); + symbol_type, start); if (err) break; } @@ -636,7 +631,7 @@ static u8 kallsyms2elf_type(char type) } static int map__process_kallsym_symbol(void *arg, const char *name, - char type, u64 start, u64 end) + char type, u64 start) { struct symbol *sym; struct process_kallsyms_args *a = arg; @@ -645,8 +640,12 @@ static int map__process_kallsym_symbol(void *arg, const char *name, if (!symbol_type__is_a(type, a->map->type)) return 0; - sym = symbol__new(start, end - start + 1, - kallsyms2elf_type(type), name); + /* + * module symbols are not sorted so we add all + * symbols, setting length to 0, and rely on + * symbols__fixup_end() to fix it up. + */ + sym = symbol__new(start, 0, kallsyms2elf_type(type), name); if (sym == NULL) return -ENOMEM; /* @@ -1729,7 +1728,7 @@ struct process_args { }; static int symbol__in_kernel(void *arg, const char *name, - char type __used, u64 start, u64 end __used) + char type __used, u64 start) { struct process_args *args = arg; diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 38ccbbb39faa..c9534fe0720d 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -299,7 +299,7 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits); int build_id__sprintf(const u8 *build_id, int len, char *bf); int kallsyms__parse(const char *filename, void *arg, int (*process_symbol)(void *arg, const char *name, - char type, u64 start, u64 end)); + char type, u64 start)); int filename__read_debuglink(const char *filename, char *debuglink, size_t size); -- 2.20.1