linux-kernel - [tip:perf/core] x86/tools: Standardize output format of insn_decode

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Date:   Tue, 12 Dec 2017 07:09:14 -0800
From:   tip-bot for Masami Hiramatsu <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, hpa@...or.com, tglx@...utronix.de,
        torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
        peterz@...radead.org, mhiramat@...nel.org, mingo@...nel.org
Subject: [tip:perf/core] x86/tools: Standardize output format of
 insn_decode_test

Commit-ID:  10c91577d5e631773a6394e14cf60125389b71ae
Gitweb:     https://git.kernel.org/tip/10c91577d5e631773a6394e14cf60125389b71ae
Author:     Masami Hiramatsu <mhiramat@...nel.org>
AuthorDate: Sat, 25 Nov 2017 00:11:22 +0900
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 12 Dec 2017 13:27:47 +0100

x86/tools: Standardize output format of insn_decode_test

Standardize warning, error, and success printout format
of insn_decode_test so that user can easily understand
which test tool caused the messages.

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/151153628279.22827.4869104298276788693.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/tools/insn_decoder_test.c | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/arch/x86/tools/insn_decoder_test.c b/arch/x86/tools/insn_decoder_test.c
index 286d2e3..a3b4fd9 100644
--- a/arch/x86/tools/insn_decoder_test.c
+++ b/arch/x86/tools/insn_decoder_test.c
@@ -17,6 +17,7 @@
 #include <string.h>
 #include <assert.h>
 #include <unistd.h>
+#include <stdarg.h>
 
 #define unlikely(cond) (cond)
 
@@ -48,10 +49,21 @@ static void usage(void)
 
 static void malformed_line(const char *line, int line_nr)
 {
-	fprintf(stderr, "%s: malformed line %d:\n%s", prog, line_nr, line);
+	fprintf(stderr, "%s: error: malformed line %d:\n%s",
+		prog, line_nr, line);
 	exit(3);
 }
 
+static void pr_warn(const char *fmt, ...)
+{
+	va_list ap;
+
+	fprintf(stderr, "%s: warning: ", prog);
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+}
+
 static void dump_field(FILE *fp, const char *name, const char *indent,
 		       struct insn_field *field)
 {
@@ -149,21 +161,20 @@ int main(int argc, char **argv)
 		insn_get_length(&insn);
 		if (insn.length != nb) {
 			warnings++;
-			fprintf(stderr, "Warning: %s found difference at %s\n",
-				prog, sym);
-			fprintf(stderr, "Warning: %s", line);
-			fprintf(stderr, "Warning: objdump says %d bytes, but "
-				"insn_get_length() says %d\n", nb,
-				insn.length);
+			pr_warn("Found an x86 instruction decoder bug, "
+				"please report this.\n", sym);
+			pr_warn("%s", line);
+			pr_warn("objdump says %d bytes, but insn_get_length() "
+				"says %d\n", nb, insn.length);
 			if (verbose)
 				dump_insn(stderr, &insn);
 		}
 	}
 	if (warnings)
-		fprintf(stderr, "Warning: decoded and checked %d"
-			" instructions with %d warnings\n", insns, warnings);
+		pr_warn("Decoded and checked %d instructions with %d "
+			"failures\n", insns, warnings);
 	else
-		fprintf(stdout, "Success: decoded and checked %d"
-			" instructions\n", insns);
+		fprintf(stdout, "%s: success: Decoded and checked %d"
+			" instructions\n", prog, insns);
 	return 0;
 }