[tip:perf/core] perf tests: Print objdump/dso buffers if they don 't match
From: tip-bot for Jan Stancek
Date: Tue Sep 15 2015 - 02:59:12 EST
Commit-ID: fd405cf6cfddd300377bd5fd9b93d2ff66fbc32d
Gitweb: http://git.kernel.org/tip/fd405cf6cfddd300377bd5fd9b93d2ff66fbc32d
Author: Jan Stancek <jstancek@xxxxxxxxxx>
AuthorDate: Wed, 2 Sep 2015 10:19:17 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 14 Sep 2015 12:50:13 -0300
perf tests: Print objdump/dso buffers if they don't match
Signed-off-by: Jan Stancek <jstancek@xxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/d0f42f786bc0e965918e0f422df25617a12a4021.1441181335.git.jstancek@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/tests/code-reading.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 8145c67..2d21183 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -162,6 +162,18 @@ static int read_via_objdump(const char *filename, u64 addr, void *buf,
return ret;
}
+static void dump_buf(unsigned char *buf, size_t len)
+{
+ size_t i;
+
+ for (i = 0; i < len; i++) {
+ pr_debug("0x%02x ", buf[i]);
+ if (i % 16 == 15)
+ pr_debug("\n");
+ }
+ pr_debug("\n");
+}
+
static int read_object_code(u64 addr, size_t len, u8 cpumode,
struct thread *thread, struct state *state)
{
@@ -264,6 +276,10 @@ static int read_object_code(u64 addr, size_t len, u8 cpumode,
/* The results should be identical */
if (memcmp(buf1, buf2, len)) {
pr_debug("Bytes read differ from those read by objdump\n");
+ pr_debug("buf1 (dso):\n");
+ dump_buf(buf1, len);
+ pr_debug("buf2 (objdump):\n");
+ dump_buf(buf2, len);
return -1;
}
pr_debug("Bytes read match those read by objdump\n");
--
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