src/share/vm/logging/logFileOutput.cpp

rev 11857 : [mq]: 8157948

@@ -43,11 +43,12 @@
 LogFileOutput::LogFileOutput(const char* name)
     : LogFileStreamOutput(NULL), _name(os::strdup_check_oom(name, mtLogging)),
       _file_name(NULL), _archive_name(NULL), _archive_name_len(0),
       _rotate_size(DefaultFileSize), _file_count(DefaultFileCount),
       _current_size(0), _current_file(0), _rotation_semaphore(1) {
-  _file_name = make_file_name(name, _pid_str, _vm_start_time_str);
+  assert(strstr(name, "file=") == name, "invalid output name '%s': missing prefix", name);
+  _file_name = make_file_name(name + strlen("file="), _pid_str, _vm_start_time_str);
 }
 
 void LogFileOutput::set_file_name_parameters(jlong vm_start_time) {
   int res = jio_snprintf(_pid_str, sizeof(_pid_str), "%d", os::current_process_id());
   assert(res > 0, "PID buffer too small");