fixed heap-buffer-overflow (#116)

deps/common/io/io.cpp

@@ -72,6 +72,8 @@ int readFromFile(const std::string &fileName, char *&outputData, size_t &fileSiz
 
   fclose(file);
 
+  data = (char *)lrealloc(data, readSize + 1);
+  data[readSize] = '\0';
   outputData = data;
   fileSize = readSize;
   return 0;

unitest/pidfile_test.cpp

@@ -30,8 +30,7 @@ int main()
 
   std::string pidFile = getPidPath();
 
-  char buf[1024] = {0};
-  char *p = buf;
+  char *p = NULL;
   size_t size = 0;
   readFromFile(pidFile, p, size);
 
@@ -39,5 +38,7 @@ int main()
   long long target = 0;
   str_to_val(temp, target);
 
+  free(p);
+
   EXPECT_EQ(pid, target);
 }