linux-kernel - [tip:perf/probes] x86: Show symbol name if insn decoder test failed

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Date:	Tue, 17 Nov 2009 06:31:17 GMT
From:	tip-bot for Masami Hiramatsu <mhiramat@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	jkenisto@...ibm.com, rdunlap@...otime.net,
	dle-develop@...ts.sourceforge.net, tglx@...utronix.de,
	sfr@...b.auug.org.au, mhiramat@...hat.com, mingo@...e.hu,
	systemtap@...rces.redhat.com
Subject: [tip:perf/probes] x86: Show symbol name if insn decoder test failed

Commit-ID:  35039eb6b199749943547c8572be6604edf00229
Gitweb:     http://git.kernel.org/tip/35039eb6b199749943547c8572be6604edf00229
Author:     Masami Hiramatsu <mhiramat@...hat.com>
AuthorDate: Mon, 16 Nov 2009 18:06:24 -0500
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 17 Nov 2009 07:16:50 +0100

x86: Show symbol name if insn decoder test failed

Show symbol name if insn decoder test find a difference.
This will help us to find out where the issue is.

Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
Cc: systemtap <systemtap@...rces.redhat.com>
Cc: DLE <dle-develop@...ts.sourceforge.net>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Randy Dunlap <rdunlap@...otime.net>
Cc: Jim Keniston <jkenisto@...ibm.com>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>
LKML-Reference: <20091116230624.5250.49813.stgit@...usame>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/tools/distill.awk    |    5 +++++
 arch/x86/tools/test_get_len.c |   10 +++++++++-
 2 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/arch/x86/tools/distill.awk b/arch/x86/tools/distill.awk
index d433619..c13c0ee 100644
--- a/arch/x86/tools/distill.awk
+++ b/arch/x86/tools/distill.awk
@@ -15,6 +15,11 @@ BEGIN {
 	fwait_str="9b\tfwait"
 }
 
+/^ *[0-9a-f]+ <[^>]*>:/ {
+	# Symbol entry
+	printf("%s%s\n", $2, $1)
+}
+
 /^ *[0-9a-f]+:/ {
 	if (split($0, field, "\t") < 3) {
 		# This is a continuation of the same insn.
diff --git a/arch/x86/tools/test_get_len.c b/arch/x86/tools/test_get_len.c
index 5743e51..af75e07 100644
--- a/arch/x86/tools/test_get_len.c
+++ b/arch/x86/tools/test_get_len.c
@@ -110,7 +110,7 @@ static void parse_args(int argc, char **argv)
 
 int main(int argc, char **argv)
 {
-	char line[BUFSIZE];
+	char line[BUFSIZE], sym[BUFSIZE] = "<unknown>";
 	unsigned char insn_buf[16];
 	struct insn insn;
 	int insns = 0, c;
@@ -122,6 +122,12 @@ int main(int argc, char **argv)
 		int nb = 0;
 		unsigned int b;
 
+		if (line[0] == '<') {
+			/* Symbol line */
+			strcpy(sym, line);
+			continue;
+		}
+
 		insns++;
 		memset(insn_buf, 0, 16);
 		strcpy(copy, line);
@@ -145,6 +151,8 @@ int main(int argc, char **argv)
 		insn_init(&insn, insn_buf, x86_64);
 		insn_get_length(&insn);
 		if (insn.length != nb) {
+			fprintf(stderr, "Error: %s found a difference at %s\n",
+				prog, sym);
 			fprintf(stderr, "Error: %s", line);
 			fprintf(stderr, "Error: objdump says %d bytes, but "
 				"insn_get_length() says %d\n", nb,
--
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