Update gs_bbox.cpp

src/gausskernel/cbb/bbox/gs_bbox.cpp

@@ -57,6 +57,22 @@ BlacklistItem g_blacklist_items[] = {
     {DATA_WRITER_QUEUE, "DATA_WRITER_QUEUE", false}
 };
 
+/*
+function name: coredump_handler
+description: When a program is abnormal, but the exception appears in the core of process and wasn't caught,
+					The function will generate a file to store the information about memory of process, status of register
+                    and running stack.
+arguments: The first argument is an integer indicating signal code that usually used in program of processing
+					signal as variable.
+				   The second argument is a structure pointer of type siginfo_t*, the memory that this pointer
+				   directs stores comprehensive information about signal, for example, which process sends
+                   and which user sends.
+                   The third argument is a pointer of type void*, other kinds of pointers can directly used here.
+return value: void
+note: none
+date: 2022/8/4
+contact tel: 18720816902
+*/
 static void coredump_handler(int sig, siginfo_t *si, void *uc)
 {
     static volatile int64 first_tid = INVALID_TID;