[tip: perf/core] perf annotate: Don't pipe objdump output through 'grep' command

[tip-bot2 for Ian Rogers]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     7a675de428364a16038a8e6ed557daf0a009ce9c
Gitweb:        https://git.kernel.org/tip/7a675de428364a16038a8e6ed557daf0a009ce9c
Author:        Ian Rogers <irogers@xxxxxxxxxx>
AuthorDate:    Thu, 10 Oct 2019 11:36:47 -07:00
Committer:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Tue, 15 Oct 2019 08:39:42 -03:00

perf annotate: Don't pipe objdump output through 'grep' command

Simplify the objdump command by not piping the output of objdump through
grep. Instead, drop lines that match the grep pattern during the reading
loop.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Song Liu <songliubraving@xxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: clang-built-linux@xxxxxxxxxxxxxxxx
Link: http://lore.kernel.org/lkml/20191010183649.23768-4-irogers@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/annotate.c |  9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 9835666..0e052e2 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1916,7 +1916,7 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
 	err = asprintf(&command,
 		 "%s %s%s --start-address=0x%016" PRIx64
 		 " --stop-address=0x%016" PRIx64
-		 " -l -d %s %s -C \"$1\" 2>/dev/null|grep -v \"$1:\"|expand",
+		 " -l -d %s %s -C \"$1\" 2>/dev/null|expand",
 		 opts->objdump_path ?: "objdump",
 		 opts->disassembler_style ? "-M " : "",
 		 opts->disassembler_style ?: "",
@@ -1962,9 +1962,16 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
 
 	nline = 0;
 	while (!feof(file)) {
+		const char *match;
+
 		if (getline(&line, &line_len, file) < 0 || !line)
 			break;
 
+		/* Skip lines containing "filename:" */
+		match = strstr(line, symfs_filename);
+		if (match && match[strlen(symfs_filename)] == ':')
+			continue;
+
 		/*
 		 * The source code line number (lineno) needs to be kept in
 		 * across calls to symbol__parse_objdump_line(), so that it