perf tools: Add a global variable "const char *input_name"

Currently many perf commands annotate/evlist/report/script/lock etc all
support "-i" option to chose a specific perf data, and all of them
create a local "input_name" to save the file name for that perf data.

Since most of these commands need it, we can add a global variable for
it, also it can some other benefits:

1. When calling script browser inside hists/annotation browser, it needs
to know the perf data file name to run that script.

2. For further feature like runtime switching to another perf data file,
this variable can also help.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1351569369-26732-2-git-send-email-feng.tang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 90d1162bb8b8..f07eae73e692 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -40,7 +40,6 @@
 struct perf_report {
         struct perf_tool        tool;
         struct perf_session     *session;
-        char const              *input_name;
         bool                    force, use_tui, use_gtk, use_stdio;
         bool                    hide_unresolved;
         bool                    dont_use_callchains;
@@ -571,7 +570,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
                 .pretty_printing_style   = "normal",
         };
         const struct option options[] = {
-        OPT_STRING('i', "input", &report.input_name, "file",
+        OPT_STRING('i', "input", &input_name, "file",
                     "input file name"),
         OPT_INCR('v', "verbose", &verbose,
                     "be more verbose (show symbol address, etc)"),
@@ -657,13 +656,13 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
         if (report.inverted_callchain)
                 callchain_param.order = ORDER_CALLER;
 
-        if (!report.input_name || !strlen(report.input_name)) {
+        if (!input_name || !strlen(input_name)) {
                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
-                        report.input_name = "-";
+                        input_name = "-";
                 else
-                        report.input_name = "perf.data";
+                        input_name = "perf.data";
         }
-        session = perf_session__new(report.input_name, O_RDONLY,
+        session = perf_session__new(input_name, O_RDONLY,
                                     report.force, false, &report.tool);
         if (session == NULL)
                 return -ENOMEM;
@@ -694,7 +693,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 
         }
 
-        if (strcmp(report.input_name, "-") != 0)
+        if (strcmp(input_name, "-") != 0)
                 setup_browser(true);
         else {
                 use_browser = 0;