Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753383Ab2HMSiC (ORCPT ); Mon, 13 Aug 2012 14:38:02 -0400 Received: from merlin.infradead.org ([205.233.59.134]:49404 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752617Ab2HMShj (ORCPT ); Mon, 13 Aug 2012 14:37:39 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Cody P Schafer , David Hansen , Ingo Molnar , Matt Hellsley , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Sukadev Bhattiprolu , Arnaldo Carvalho de Melo Subject: [PATCH 34/38] perf symbols: Switch dso__synthesize_plt_symbols() to use symsrc Date: Mon, 13 Aug 2012 15:37:15 -0300 Message-Id: <1344883039-13495-35-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.7.9.2.358.g22243 In-Reply-To: <1344883039-13495-1-git-send-email-acme@infradead.org> References: <1344883039-13495-1-git-send-email-acme@infradead.org> Content-Type: text/plain; charset="UTF-8" X-SRS-Rewrite: SMTP reverse-path rewritten from by canuck.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4928 Lines: 150 From: Cody P Schafer Previously dso__synthesize_plt_symbols() was reopening the elf file to obtain dynsyms from it. Rather than reopen the file, use the already opened reference within the symsrc to access it. Setup for the later patch "perf symbols: Use both runtime and debug images" 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/1344637382-22789-14-git-send-email-cody@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/symbol-elf.c | 25 +++++++------------------ tools/perf/util/symbol-minimal.c | 3 ++- tools/perf/util/symbol.c | 8 +++++--- tools/perf/util/symbol.h | 4 ++-- 4 files changed, 16 insertions(+), 24 deletions(-) diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 3a9c38a..5915947 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -166,7 +166,7 @@ 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). */ -int dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, +int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, struct map *map, symbol_filter_t filter) { uint32_t nr_rel_entries, idx; @@ -181,21 +181,15 @@ int dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, GElf_Ehdr ehdr; char sympltname[1024]; Elf *elf; - int nr = 0, symidx, fd, err = 0; + int nr = 0, symidx, err = 0; - fd = open(name, O_RDONLY); - if (fd < 0) - goto out; - - elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); - if (elf == NULL) - goto out_close; + elf = ss->elf; + ehdr = ss->ehdr; - if (gelf_getehdr(elf, &ehdr) == NULL) - goto out_elf_end; + scn_dynsym = ss->dynsym; + shdr_dynsym = ss->dynshdr; + dynsym_idx = ss->dynsym_idx; - scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, - ".dynsym", &dynsym_idx); if (scn_dynsym == NULL) goto out_elf_end; @@ -291,13 +285,8 @@ int dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, err = 0; out_elf_end: - elf_end(elf); -out_close: - close(fd); - if (err == 0) return nr; -out: pr_debug("%s: problems reading %s PLT info.\n", __func__, dso->long_name); return 0; diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c index 1b16c27..cc580c0 100644 --- a/tools/perf/util/symbol-minimal.c +++ b/tools/perf/util/symbol-minimal.c @@ -266,7 +266,8 @@ void symsrc__destroy(struct symsrc *ss) close(ss->fd); } -int dso__synthesize_plt_symbols(struct dso *dso __used, char *name __used, +int dso__synthesize_plt_symbols(struct dso *dso __used, + struct symsrc *ss __used, struct map *map __used, symbol_filter_t filter __used) { diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 2b3495a..f8a3068 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1091,21 +1091,23 @@ restart: ret = dso__load_sym(dso, map, &ss, filter, 0, want_symtab); - symsrc__destroy(&ss); /* * Some people seem to have debuginfo files _WITHOUT_ debug * info!?!? */ - if (!ret) + if (!ret) { + symsrc__destroy(&ss); continue; + } if (ret > 0) { int nr_plt; - nr_plt = dso__synthesize_plt_symbols(dso, name, map, filter); + nr_plt = dso__synthesize_plt_symbols(dso, &ss, map, filter); if (nr_plt > 0) ret += nr_plt; + symsrc__destroy(&ss); break; } } diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index dd9e867..2981513 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -370,8 +370,8 @@ ssize_t dso__data_read_addr(struct dso *dso, struct map *map, int dso__test_data(void); int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *ss, symbol_filter_t filter, int kmodule, int want_symtab); -int dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, - symbol_filter_t filter); +int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, + struct map *map, symbol_filter_t filter); void symbols__insert(struct rb_root *symbols, struct symbol *sym); void symbols__fixup_duplicate(struct rb_root *symbols); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/