Commit-ID: 680d926a8cb08dd9cf173e2bb93d4a4477771949 Gitweb: http://git.kernel.org/tip/680d926a8cb08dd9cf173e2bb93d4a4477771949 Author: Namhyung Kim <[email protected]> AuthorDate: Fri, 6 Mar 2015 16:31:27 +0900 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Thu, 12 Mar 2015 12:39:54 -0300
perf symbols: Allow symbol alias when loading map for symbol name When perf probe tries to add a probe in a binary using symbol name, it sometimes failed since some symbols were discard during loading dso. When it resolves an address to symbol, it'd be better to have just one symbol at given address. But for finding address from symbol, it'd be better to keep all names (including aliases). So allow tools to state that they want to allow aliases via symbol_conf.allow_aliases. Signed-off-by: Namhyung Kim <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> Cc: David Ahern <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Naohiro Aota <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] [ Original patch passwd allow_alias to many functions, use symbol_conf.allow_aliases instead ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/util/probe-event.c | 1 + tools/perf/util/symbol-elf.c | 3 ++- tools/perf/util/symbol.h | 1 + 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index c379ea0..9feba0e 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -80,6 +80,7 @@ static int init_symbol_maps(bool user_only) int ret; symbol_conf.sort_by_name = true; + symbol_conf.allow_aliases = true; ret = symbol__init(NULL); if (ret < 0) { pr_debug("Failed to init symbol map.\n"); diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index ada1676..62742e4 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -1048,7 +1048,8 @@ new_symbol: * For misannotated, zeroed, ASM function sizes. */ if (nr > 0) { - symbols__fixup_duplicate(&dso->symbols[map->type]); + if (!symbol_conf.allow_aliases) + symbols__fixup_duplicate(&dso->symbols[map->type]); symbols__fixup_end(&dso->symbols[map->type]); if (kmap) { /* diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 1650dcb..efdaaa5 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -87,6 +87,7 @@ struct symbol_conf { ignore_vmlinux_buildid, show_kernel_path, use_modules, + allow_aliases, sort_by_name, show_nr_samples, show_total_period, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
