linux-kernel - [tip:perf/core] perf annotate: Mark jump instructions with no offset

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Message-ID: <tip-xrn35g2mlawz1ydo1p73w3q6@git.kernel.org>
Date:	Fri, 27 Apr 2012 01:44:54 -0700
From:	tip-bot for Arnaldo Carvalho de Melo <acme@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, eranian@...gle.com, paulus@...ba.org,
	acme@...hat.com, hpa@...or.com, mingo@...nel.org,
	peterz@...radead.org, efault@....de, namhyung@...il.com,
	fweisbec@...il.com, dsahern@...il.com, tglx@...utronix.de
Subject: [tip:perf/core] perf annotate:
  Mark jump instructions with no offset

Commit-ID:  fb29fa58e36df09c807d252247d64a221fcd5bbb
Gitweb:     http://git.kernel.org/tip/fb29fa58e36df09c807d252247d64a221fcd5bbb
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Wed, 25 Apr 2012 14:16:03 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 25 Apr 2012 14:16:03 -0300

perf annotate: Mark jump instructions with no offset

I.e. jumps that go to code outside the current function, that is denoted
in objdump -dS as:

   399f877a9f: jne    399f87bcf4 <_L_lock_5154>

I.e. without the + after the name of the current function, like in:

   399f877aa5: jmp    399f877ab2 <_int_free+0x412>

The browser will use that info to avoid drawing connectors to the start
of the function, since ops.target.addr was zero.

Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Mike Galbraith <efault@....de>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-xrn35g2mlawz1ydo1p73w3q6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/annotate.c |    9 ++++++---
 tools/perf/util/annotate.h |    6 ++++++
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index e1e7d0e..5eb3412 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -75,10 +75,13 @@ static int jump__parse(struct ins_operands *ops)
 {
 	const char *s = strchr(ops->raw, '+');
 
-	if (s++ == NULL)
-		return -1;
+	ops->target.addr = strtoll(ops->raw, NULL, 16);
+
+	if (s++ != NULL)
+		ops->target.offset = strtoll(s, NULL, 16);
+	else
+		ops->target.offset = UINT64_MAX;
 
-	ops->target.offset = strtoll(s, NULL, 16);
 	return 0;
 }
 
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 2b9e3e0..13a21f1 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -2,6 +2,7 @@
 #define __PERF_ANNOTATE_H
 
 #include <stdbool.h>
+#include <stdint.h>
 #include "types.h"
 #include "symbol.h"
 #include <linux/list.h>
@@ -41,6 +42,11 @@ struct disasm_line {
 	struct ins_operands ops;
 };
 
+static inline bool disasm_line__has_offset(const struct disasm_line *dl)
+{
+	return dl->ops.target.offset != UINT64_MAX;
+}
+
 void disasm_line__free(struct disasm_line *dl);
 struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos);
 size_t disasm__fprintf(struct list_head *head, FILE *fp);
--
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