[PATCH 1/2] perf probe: Helper function to check if probe with variable

[Ravi Bangoria]

Introduce helper function instead of inline code and replace hardcoded
strings "$vars" and "$params" with their corresponding macros.

perf_probe_with_var is not declared as static since it will be called
from different file in subsequent patch.

Signed-off-by: Ravi Bangoria <ravi.bango...@linux.vnet.ibm.com>
---
 tools/perf/util/probe-event.c | 22 +++++++++++++++-------
 tools/perf/util/probe-event.h |  2 ++
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 953dc1a..bc9317e 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -1592,19 +1592,27 @@ out:
        return ret;
 }
 
+/* Returns true if *any* ARG is either C variable, $params or $vars. */
+bool perf_probe_with_var(struct perf_probe_event *pev)
+{
+       int i = 0;
+
+       for (i = 0; i < pev->nargs; i++)
+               if (is_c_varname(pev->args[i].var)              ||
+                   !strcmp(pev->args[i].var, PROBE_ARG_PARAMS) ||
+                   !strcmp(pev->args[i].var, PROBE_ARG_VARS))
+                       return true;
+       return false;
+}
+
 /* Return true if this perf_probe_event requires debuginfo */
 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
 {
-       int i;
-
        if (pev->point.file || pev->point.line || pev->point.lazy_line)
                return true;
 
-       for (i = 0; i < pev->nargs; i++)
-               if (is_c_varname(pev->args[i].var) ||
-                   !strcmp(pev->args[i].var, "$params") ||
-                   !strcmp(pev->args[i].var, "$vars"))
-                       return true;
+       if (perf_probe_with_var(pev))
+               return true;
 
        return false;
 }
diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index e18ea9f..4d1139b 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -128,6 +128,8 @@ char *synthesize_perf_probe_point(struct perf_probe_point 
*pp);
 int perf_probe_event__copy(struct perf_probe_event *dst,
                           struct perf_probe_event *src);
 
+bool perf_probe_with_var(struct perf_probe_event *pev);
+
 /* Check the perf_probe_event needs debuginfo */
 bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
 
-- 
2.5.5