From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Naohiro Aota <naota@elisp.net>,
Peter Zijlstra <peterz@infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
David Ahern <dsahern@gmail.com>,
namhyung@kernel.org, Jiri Olsa <jolsa@redhat.com>,
Ingo Molnar <mingo@kernel.org>
Subject: [PATCH perf/core 1/4] [RESEND][BUGFIX] perf-probe: Remove bias offset to find probe point by address
Date: Mon, 02 Mar 2015 21:49:46 +0900 [thread overview]
Message-ID: <20150302124946.9191.64085.stgit@localhost.localdomain> (raw)
In-Reply-To: <20150302124939.9191.33564.stgit@localhost.localdomain>
Remove bias offset to find probe point by address.
Without this patch, probe points on kernel and executables
are shown correctly, but not work with libraries.
-----
# ./perf probe -l
probe:do_fork (on do_fork@kernel/fork.c)
probe_libc:malloc (on malloc in /usr/lib64/libc-2.17.so)
probe_perf:strlist__new (on strlist__new@util/strlist.c in /home/mhiramat/ksrc/linux-3/tools/perf/perf)
-----
Removing bias allows to show it as real place.
-----
# ./perf probe -l
probe:do_fork (on do_fork@kernel/fork.c)
probe_libc:malloc (on __libc_malloc@malloc/malloc.c in /usr/lib64/libc-2.17.so)
probe_perf:strlist__new (on strlist__new@util/strlist.c in /home/mhiramat/ksrc/linux-3/tools/perf/perf)
-----
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
---
tools/perf/util/probe-finder.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index d141935..46f009a 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -1345,11 +1345,8 @@ int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr,
const char *fname = NULL, *func = NULL, *basefunc = NULL, *tmp;
int baseline = 0, lineno = 0, ret = 0;
- /* Adjust address with bias */
- addr += dbg->bias;
-
/* Find cu die */
- if (!dwarf_addrdie(dbg->dbg, (Dwarf_Addr)addr - dbg->bias, &cudie)) {
+ if (!dwarf_addrdie(dbg->dbg, (Dwarf_Addr)addr, &cudie)) {
pr_warning("Failed to find debug information for address %lx\n",
addr);
ret = -EINVAL;
next prev parent reply other threads:[~2015-03-02 12:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-02 12:49 [PATCH perf/core 0/4] perf-probe: improve glibc support Masami Hiramatsu
2015-03-02 12:49 ` Masami Hiramatsu [this message]
2015-03-03 6:26 ` [tip:perf/core] perf probe: Remove bias offset to find probe point by address tip-bot for Masami Hiramatsu
2015-03-02 12:49 ` [PATCH perf/core 2/4] perf-probe: Fix to handle aliased symbols in glibc Masami Hiramatsu
2015-03-02 15:46 ` Arnaldo Carvalho de Melo
2015-03-03 2:39 ` Masami Hiramatsu
2015-03-03 2:45 ` Arnaldo Carvalho de Melo
2015-03-03 3:05 ` Arnaldo Carvalho de Melo
2015-03-03 4:11 ` Masami Hiramatsu
2015-03-03 4:24 ` Arnaldo Carvalho de Melo
2015-03-03 13:31 ` Namhyung Kim
2015-03-04 5:47 ` Masami Hiramatsu
2015-03-02 12:50 ` [PATCH perf/core 3/4] perf-probe: Fix --line " Masami Hiramatsu
2015-03-02 12:50 ` [PATCH perf/core 4/4] Revert "perf probe: Fix to fall back to find probe point in symbols" Masami Hiramatsu
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