sm8450-common: nonui-notifier: Switch to shared_ptr to avoid memory leaks

Change-Id: I950bd5f6abd1dd78093864f5813ab22f0e093ded

sensors/sensor-notifier/include/SensorNotifierUtils.h

@@ -6,7 +6,9 @@
 
 #pragma once
 
+#include <memory>
+
 #include <display/drm/mi_disp.h>
 
 bool readBool(int fd);
-disp_event_resp* parseDispEvent(int fd);
+std::shared_ptr<disp_event_resp> parseDispEvent(int fd);

sensors/sensor-notifier/notifiers/AodNotifier.cpp

@@ -91,7 +91,7 @@ void AodNotifier::notify() {
             continue;
         }
 
-        struct disp_event_resp* response = parseDispEvent(disp_fd_.get());
+        std::shared_ptr<disp_event_resp> response = parseDispEvent(disp_fd_.get());
         if (response == nullptr) {
             continue;
         }

sensors/sensor-notifier/notifiers/LightNotifier.cpp

@@ -93,7 +93,7 @@ void LightNotifier::notify() {
             continue;
         }
 
-        struct disp_event_resp* response = parseDispEvent(disp_fd_.get());
+        std::shared_ptr<disp_event_resp> response = parseDispEvent(disp_fd_.get());
         if (response == nullptr) {
             continue;
         }

sensors/sensor-notifier/utils/SensorNotifierUtils.cpp

@@ -29,7 +29,7 @@ bool readBool(int fd) {
     return c != '0';
 }
 
-disp_event_resp* parseDispEvent(int fd) {
+std::shared_ptr<disp_event_resp> parseDispEvent(int fd) {
     disp_event header;
     ssize_t headerSize = read(fd, &header, sizeof(header));
     if (headerSize < sizeof(header)) {
@@ -37,8 +37,12 @@ disp_event_resp* parseDispEvent(int fd) {
         return nullptr;
     }
 
-    struct disp_event_resp* response =
-            reinterpret_cast<struct disp_event_resp*>(malloc(header.length));
+    std::shared_ptr<disp_event_resp> response(static_cast<disp_event_resp*>(malloc(header.length)),
+                                              free);
+    if (!response) {
+        LOG(ERROR) << "failed to allocate memory for display event response";
+        return nullptr;
+    }
     response->base = header;
 
     int dataLength = response->base.length - sizeof(response->base);