Add an exception handling about overflow

Change-Id: If173382502806a399ddfa1b5f6553a6601cb0bd1
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>

3 files changed, 20 insertions, 13 deletions

diff --git a/inc/launchpad_common.h b/inc/launchpad_common.h
index 63a9de3..93ba100 100644
--- a/inc/launchpad_common.h
+++ b/inc/launchpad_common.h
@@ -105,7 +105,7 @@ void _appinfo_free(appinfo_t *menu_info);
 char *_appinfo_get_app_path(appinfo_t *menu_info);
 int _proc_get_attr_by_pid(int pid, char *buf, int size);
 int _close_all_fds(void);
-void _get_cpu_idle(long long *total, long long *idle);
+void _get_cpu_idle(unsigned long long *total, unsigned long long *idle);
 int _setup_stdio(const char *ident);
 
 #endif /* __LAUNCHPAD_COMMON_H__ */
diff --git a/src/launchpad.c b/src/launchpad.c
index 9177a5f..2c38f2b 100755
--- a/src/launchpad.c
+++ b/src/launchpad.c
@@ -74,8 +74,8 @@ typedef struct {
 	char *loader_extra;
 	int detection_method;
 	int timeout_val;
-	long long cpu_total_time;
-	long long cpu_idle_time;
+	unsigned long long cpu_total_time;
+	unsigned long long cpu_idle_time;
 	guint idle_checker;
 } candidate_process_context_t;
 
@@ -1082,8 +1082,8 @@ static gboolean __handle_label_monitor(gpointer data)
 
 static gboolean __handle_idle_checker(gpointer data)
 {
-	long long total = 0;
-	long long idle = 0;
+	unsigned long long total = 0;
+	unsigned long long idle = 0;
 	int per;
 	candidate_process_context_t *cpc = data;
 
@@ -1109,8 +1109,8 @@ static int __dispatch_cmd_hint(bundle *kb, int detection_method)
 {
 	candidate_process_context_t *cpc;
 	GList *iter = candidate_slot_list;
-	long long total = 0;
-	long long idle = 0;
+	unsigned long long total = 0;
+	unsigned long long idle = 0;
 
 	_W("cmd hint %d", detection_method);
 	while (iter) {
@@ -1575,8 +1575,8 @@ static void __add_slot_from_info(gpointer data, gpointer user_data)
 	candidate_process_context_t *cpc;
 	bundle_raw *extra = NULL;
 	int len;
-	long long total = 0;
-	long long idle = 0;
+	unsigned long long total = 0;
+	unsigned long long idle = 0;
 
 	if (!strcmp(info->exe, "null")) {
 		cpc = __add_slot(LAUNCHPAD_TYPE_USER + user_slot_offset,
diff --git a/src/launchpad_common.c b/src/launchpad_common.c
index 201c3d9..d36c2e4 100644
--- a/src/launchpad_common.c
+++ b/src/launchpad_common.c
@@ -72,13 +72,13 @@ static int __read_proc(const char *path, char *buf, int size)
 	return ret;
 }
 
-void _get_cpu_idle(long long *total, long long *idle)
+void _get_cpu_idle(unsigned long long *total, unsigned long long *idle)
 {
 	FILE *fp;
 	int i;
-	long long sum = 0;
-	long long val;
-	long long iv = 0;
+	unsigned long long sum = 0;
+	unsigned long long val;
+	unsigned long long iv = 0;
 	char buf[4] = { 0, };
 
 	fp = fopen("/proc/stat", "rt");
@@ -96,6 +96,13 @@ void _get_cpu_idle(long long *total, long long *idle)
 			fclose(fp);
 			return;
 		}
+
+		if (sum + val < sum) {
+			_E("overflow");
+			fclose(fp);
+			return;
+		}
+
 		sum += val;
 		if (i == 3) /* idle */
 			iv = val;