perf probe: Add helper function to check if probe with variable

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.bangoria@linux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1470214725-5023-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 8a1e9e67614f415955c92f89dacec5deec24d800..a543e9ca581c46cc433806553f44964ca176264f 100644 (file)
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -1618,19 +1618,27 @@ 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 62094082d940594200e5a0a2b21af2774130395f..8091d15113f7a465437e8aa2e7d731583428fedd 100644 (file)
--- 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);