From d26cd12b46cb6b5595143804b43ba5aa7968551e Mon Sep 17 00:00:00 2001 From: Cody P Schafer Date: Fri, 10 Aug 2012 15:23:00 -0700 Subject: [PATCH] perf symbols: Factor want_symtab out of dso__load_sym() Only one callsite of dso__load_sym() uses the want_symtab functionality, so place the logic at the callsite instead of within dso__load_sym(). This sets us up for removal of want_symtab completely once we keep multiple elf handles (within symsrc's) around. 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/1344637382-22789-15-git-send-email-cody@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/symbol-elf.c | 21 ++++++++++----------- tools/perf/util/symbol-minimal.c | 8 ++++++-- tools/perf/util/symbol.c | 10 +++++++--- tools/perf/util/symbol.h | 3 ++- 4 files changed, 25 insertions(+), 17 deletions(-) diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 591594775904..492ebecfbfb6 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -525,6 +525,10 @@ static int dso__swap_init(struct dso *dso, unsigned char eidata) return 0; } +bool symsrc__has_symtab(struct symsrc *ss) +{ + return ss->symtab != NULL; +} void symsrc__destroy(struct symsrc *ss) { @@ -616,7 +620,7 @@ out_close: } int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *ss, - symbol_filter_t filter, int kmodule, int want_symtab) + symbol_filter_t filter, int kmodule) { struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL; struct map *curr_map = map; @@ -636,21 +640,16 @@ int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *ss, dso->symtab_type = ss->type; + if (!ss->symtab) { + ss->symtab = ss->dynsym; + ss->symshdr = ss->dynshdr; + } + elf = ss->elf; ehdr = ss->ehdr; sec = ss->symtab; shdr = ss->symshdr; - if (sec == NULL) { - if (want_symtab) - goto out_elf_end; - - sec = ss->dynsym; - shdr = ss->dynshdr; - if (sec == NULL) - goto out_elf_end; - } - opdsec = ss->opdsec; opdshdr = ss->opdshdr; opdidx = ss->opdidx; diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c index cc580c046c04..11c2c606ce77 100644 --- a/tools/perf/util/symbol-minimal.c +++ b/tools/perf/util/symbol-minimal.c @@ -260,6 +260,11 @@ out_close: return -1; } +bool symsrc__has_symtab(struct symsrc *ss __used) +{ + return false; +} + void symsrc__destroy(struct symsrc *ss) { free(ss->name); @@ -275,8 +280,7 @@ int dso__synthesize_plt_symbols(struct dso *dso __used, } int dso__load_sym(struct dso *dso, struct map *map __used, struct symsrc *ss, - symbol_filter_t filter __used, int kmodule __used, - int want_symtab __used) + symbol_filter_t filter __used, int kmodule __used) { unsigned char *build_id[BUILD_ID_SIZE]; diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index f8a306865201..8e7d74ff6ba5 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1089,8 +1089,12 @@ restart: if (symsrc__init(&ss, dso, name, symtab_type) < 0) continue; - ret = dso__load_sym(dso, map, &ss, filter, 0, - want_symtab); + if (want_symtab && !symsrc__has_symtab(&ss)) { + symsrc__destroy(&ss); + continue; + } + + ret = dso__load_sym(dso, map, &ss, filter, 0); /* * Some people seem to have debuginfo files _WITHOUT_ debug @@ -1376,7 +1380,7 @@ int dso__load_vmlinux(struct dso *dso, struct map *map, if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) return -1; - err = dso__load_sym(dso, map, &ss, filter, 0, 0); + err = dso__load_sym(dso, map, &ss, filter, 0); symsrc__destroy(&ss); if (err > 0) { diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 2981513ce1d4..fa9f6b1cdc46 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -252,6 +252,7 @@ struct symsrc { void symsrc__destroy(struct symsrc *ss); int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, enum dso_binary_type type); +bool symsrc__has_symtab(struct symsrc *ss); #define DSO__SWAP(dso, type, val) \ ({ \ @@ -369,7 +370,7 @@ ssize_t dso__data_read_addr(struct dso *dso, struct map *map, u8 *data, ssize_t size); 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); + symbol_filter_t filter, int kmodule); int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, struct map *map, symbol_filter_t filter); -- 2.20.1