[PATCH] perf script: add --addr2line option

[m . liska]

From: Martin Liska <martin.liska@xxxxxxx>

Similarly to other subcommands (like report, top), it would be handy to
provide a path for addr2line command.
---
 tools/perf/Documentation/perf-script.txt |  3 +++
 tools/perf/builtin-script.c              | 10 +++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index ff086ef05a0c..5abb960c4960 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -369,6 +369,9 @@ OPTIONS
 --demangle-kernel::
 	Demangle kernel symbol names to human readable form (for C++ kernels).
 
+--addr2line=<path>::
+	Path to addr2line binary.
+
 --header
 	Show perf.data header.
 
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index c16224b1fef3..301ea1c98e36 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -3897,7 +3897,7 @@ int cmd_script(int argc, const char **argv)
 	};
 	struct utsname uts;
 	char *script_path = NULL;
-	const char *dlfilter_file = NULL;
+	const char *dlfilter_file = NULL, *addr2line_path = NULL;
 	const char **__argv;
 	int i, j, err = 0;
 	struct perf_script script = {
@@ -4052,6 +4052,8 @@ int cmd_script(int argc, const char **argv)
 			"Enable symbol demangling"),
 	OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
 			"Enable kernel symbol demangling"),
+	OPT_STRING(0, "addr2line", &addr2line_path, "path",
+			"addr2line binary to use for line numbers"),
 	OPT_STRING(0, "time", &script.time_str, "str",
 		   "Time span of interest (start,stop)"),
 	OPT_BOOLEAN(0, "inline", &symbol_conf.inline_name,
@@ -4138,6 +4140,12 @@ int cmd_script(int argc, const char **argv)
 	    itrace_synth_opts.callchain_sz > scripting_max_stack)
 		scripting_max_stack = itrace_synth_opts.callchain_sz;
 
+	if (addr2line_path) {
+		symbol_conf.addr2line_path = strdup(addr2line_path);
+		if (!symbol_conf.addr2line_path)
+			return -ENOMEM;
+	}
+
 	/* make sure PERF_EXEC_PATH is set for scripts */
 	set_argv_exec_path(get_argv_exec_path());
 
-- 
2.45.2