Commit-ID: 82164161679c448f33092945ea97cb547a13683a Gitweb: http://git.kernel.org/tip/82164161679c448f33092945ea97cb547a13683a Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> AuthorDate: Mon, 16 Nov 2009 13:48:11 -0200 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Mon, 16 Nov 2009 17:29:54 +0100 perf symbols: Call the symbol filter in dso__synthesize_plt_symbols() We need to pass the symbol to the filter so that, for instance, 'perf top' can do filtering and also set the private area it manages, setting the ->map pointer, etc. I found this while running 'perf top' on a machine where hits happened on PLT symbols, where ->map wasn't being set up and segfaults thus happened. Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx> Cc: Mike Galbraith <efault@xxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> LKML-Reference: <1258386491-20278-1-git-send-email-acme@xxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- tools/perf/util/symbol.c | 26 ++++++++++++++++++++------ 1 files changed, 20 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 9c286db..93e4b52 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -281,6 +281,11 @@ static int kernel_maps__load_all_kallsyms(void) if (sym == NULL) goto out_delete_line; + /* + * We will pass the symbols to the filter later, in + * kernel_maps__split_kallsyms, when we have split the + * maps per module + */ dso__insert_symbol(kernel_map->dso, sym); } @@ -555,7 +560,8 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, * And always look at the original dso, not at debuginfo packages, that * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). */ -static int dso__synthesize_plt_symbols(struct dso *self) +static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, + symbol_filter_t filter) { uint32_t nr_rel_entries, idx; GElf_Sym sym; @@ -643,8 +649,12 @@ static int dso__synthesize_plt_symbols(struct dso *self) if (!f) goto out_elf_end; - dso__insert_symbol(self, f); - ++nr; + if (filter && filter(map, f)) + symbol__delete(f); + else { + dso__insert_symbol(self, f); + ++nr; + } } } else if (shdr_rel_plt.sh_type == SHT_REL) { GElf_Rel pos_mem, *pos; @@ -661,8 +671,12 @@ static int dso__synthesize_plt_symbols(struct dso *self) if (!f) goto out_elf_end; - dso__insert_symbol(self, f); - ++nr; + if (filter && filter(map, f)) + symbol__delete(f); + else { + dso__insert_symbol(self, f); + ++nr; + } } } @@ -1050,7 +1064,7 @@ compare_build_id: goto more; if (ret > 0) { - int nr_plt = dso__synthesize_plt_symbols(self); + int nr_plt = dso__synthesize_plt_symbols(self, map, filter); if (nr_plt > 0) ret += nr_plt; } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html