perf tools: Introduce zfree
For the frequent idiom of:
free(ptr);
ptr = NULL;
Make it expect a pointer to the pointer being freed, so that it becomes
clear at first sight that the variable being freed is being modified.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-pfw02ezuab37kha18wlut7ir@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index 94223d40..d11541d 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -256,8 +256,7 @@
__ui_browser__show_title(browser, title);
browser->title = title;
- free(browser->helpline);
- browser->helpline = NULL;
+ zfree(&browser->helpline);
va_start(ap, helpline);
err = vasprintf(&browser->helpline, helpline, ap);
@@ -272,8 +271,7 @@
{
pthread_mutex_lock(&ui__lock);
ui_helpline__pop();
- free(browser->helpline);
- browser->helpline = NULL;
+ zfree(&browser->helpline);
pthread_mutex_unlock(&ui__lock);
}
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 0d9dd99..022d173 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1267,10 +1267,8 @@
{
int i;
- for (i = 0; i < n; ++i) {
- free(options[i]);
- options[i] = NULL;
- }
+ for (i = 0; i < n; ++i)
+ zfree(&options[i]);
}
/* Check whether the browser is for 'top' or 'report' */
diff --git a/tools/perf/ui/gtk/util.c b/tools/perf/ui/gtk/util.c
index 696c1fb..52e7fc4 100644
--- a/tools/perf/ui/gtk/util.c
+++ b/tools/perf/ui/gtk/util.c
@@ -23,8 +23,7 @@
if (!perf_gtk__is_active_context(*ctx))
return -1;
- free(*ctx);
- *ctx = NULL;
+ zfree(ctx);
return 0;
}