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Subject[tip:perf/urgent] perf probe: Show need-dwarf message only if it is really needed
Commit-ID:  411edfe5c1ef02a62ec3be56d3e234dbed71ba20
Gitweb: http://git.kernel.org/tip/411edfe5c1ef02a62ec3be56d3e234dbed71ba20
Author: Masami Hiramatsu <mhiramat@redhat.com>
AuthorDate: Tue, 15 Dec 2009 10:31:35 -0500
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 15 Dec 2009 20:22:01 +0100

perf probe: Show need-dwarf message only if it is really needed

Show need-dwarf message only if the probe is really requires
debuginfo analysis. This also use pr_debug for debugging message
instead of pr_warning.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091215153135.17436.99052.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/builtin-probe.c | 18 +++++++++++-------
tools/perf/util/probe-finder.c | 4 +---
2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 919037b..438a7bb 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -261,15 +261,19 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)

lseek(fd, SEEK_SET, 0);
ret = find_probepoint(fd, pp);
- if (ret < 0) {
- if (session.need_dwarf)
- die("Could not analyze debuginfo.");
-
- pr_warning("An error occurred in debuginfo analysis. Try to use symbols.\n");
- break;
- }
+ if (ret > 0)
+ continue;
if (ret == 0) /* No error but failed to find probe point. */
die("No probe point found.");
+ /* Error path */
+ if (session.need_dwarf) {
+ if (ret == -ENOENT)
+ pr_warning("No dwarf info found in the vmlinux - please rebuild with CONFIG_DEBUG_INFO=y.\n");
+ die("Could not analyze debuginfo.");
+ }
+ pr_debug("An error occurred in debuginfo analysis."
+ " Try to use symbols.\n");
+ break;
}
close(fd);

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 4585f1d..4b852c0 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -687,10 +687,8 @@ int find_probepoint(int fd, struct probe_point *pp)
struct probe_finder pf = {.pp = pp};

ret = dwarf_init(fd, DW_DLC_READ, 0, 0, &__dw_debug, &__dw_error);
- if (ret != DW_DLV_OK) {
- pr_warning("No dwarf info found in the vmlinux - please rebuild with CONFIG_DEBUG_INFO.\n");
+ if (ret != DW_DLV_OK)
return -ENOENT;
- }

pp->found = 0;
while (++cu_number) {

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