[tip:perf/core] perf annotate: Resolve symbols using objdump comment for single op ins

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  a43712c4720c8df4bad7d3760c67086168553b05
Gitweb:     http://git.kernel.org/tip/a43712c4720c8df4bad7d3760c67086168553b05
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Fri, 11 May 2012 17:21:09 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 11 May 2012 17:21:09 -0300

perf annotate: Resolve symbols using objdump comment for single op ins

Starting with inc, incl, dec, decl.

Requested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-jvh0jspefr5jyn0l7qko12st@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/annotate.c |   45 ++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 82c7f63..a6109dc 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -205,6 +205,47 @@ static struct ins_ops mov_ops = {
 	.scnprintf = mov__scnprintf,
 };
 
+static int dec__parse(struct ins_operands *ops)
+{
+	char *target, *comment, *s, prev;
+
+	target = s = ops->raw;
+
+	while (s[0] != '\0' && !isspace(s[0]))
+		++s;
+	prev = *s;
+	*s = '\0';
+
+	ops->target.raw = strdup(target);
+	*s = prev;
+
+	if (ops->target.raw == NULL)
+		return -1;
+
+	comment = strchr(s, '#');
+	if (comment == NULL)
+		return 0;
+
+	while (comment[0] != '\0' && isspace(comment[0]))
+		++comment;
+
+	comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
+
+	return 0;
+}
+
+static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
+			   struct ins_operands *ops)
+{
+	return scnprintf(bf, size, "%-6.6s %s", ins->name,
+			 ops->target.name ?: ops->target.raw);
+}
+
+static struct ins_ops dec_ops = {
+	.parse	   = dec__parse,
+	.scnprintf = dec__scnprintf,
+};
+
 static int nop__scnprintf(struct ins *ins __used, char *bf, size_t size,
 			  struct ins_operands *ops __used)
 {
@@ -232,7 +273,11 @@ static struct ins instructions[] = {
 	{ .name = "cmpq",  .ops  = &mov_ops, },
 	{ .name = "cmpw",  .ops  = &mov_ops, },
 	{ .name = "cmpxch", .ops  = &mov_ops, },
+	{ .name = "dec",   .ops  = &dec_ops, },
+	{ .name = "decl",  .ops  = &dec_ops, },
 	{ .name = "imul",  .ops  = &mov_ops, },
+	{ .name = "inc",   .ops  = &dec_ops, },
+	{ .name = "incl",  .ops  = &dec_ops, },
 	{ .name = "ja",	   .ops  = &jump_ops, },
 	{ .name = "jae",   .ops  = &jump_ops, },
 	{ .name = "jb",	   .ops  = &jump_ops, },
--
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