Fuzz introspector: FuzzServer
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
6 15 modbus_new_tcp call site: 00015 modbus_free
6 22 server call site: 00022 modbus_strerror
6 46 modbus_tcp_accept call site: 00046 fprintf
2 12 modbus_new_tcp call site: 00012 modbus_free
2 37 modbus_tcp_listen call site: 00037 fprintf
1 8 client call site: 00008 pthread_exit
1 30 server call site: 00030 __errno_location
1 33 modbus_tcp_listen call site: 00033 close
1 35 modbus_tcp_listen call site: 00035 htonl
1 40 modbus_tcp_listen call site: 00040 close
1 42 modbus_tcp_listen call site: 00042 close
1 44 server call site: 00044 __errno_location

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 pthread_create [call site] 00001
1 client [function] [call site] 00002
2 socket [call site] 00003
2 htons [call site] 00004
2 inet_addr [call site] 00005
2 connect [call site] 00006
2 send [call site] 00007
2 close [call site] 00008
2 pthread_exit [call site] 00009
1 server [function] [call site] 00010
2 modbus_new_tcp [function] [call site] 00011
3 _modbus_init_common [function] [call site] 00012
3 modbus_free [function] [call site] 00013
3 __errno_location [call site] 00014
3 strlcpy [function] [call site] 00015
3 fprintf [call site] 00016
3 modbus_free [function] [call site] 00017
3 __errno_location [call site] 00018
3 fprintf [call site] 00019
3 modbus_free [function] [call site] 00020
3 __errno_location [call site] 00021
2 modbus_mapping_new_start_address [function] [call site] 00022
3 __errno_location [call site] 00023
2 __errno_location [call site] 00024
2 modbus_strerror [function] [call site] 00025
3 strerror [call site] 00026
2 fprintf [call site] 00027
2 modbus_free [function] [call site] 00028
2 modbus_set_bits_from_bytes [function] [call site] 00029
2 modbus_tcp_listen [function] [call site] 00030
3 __errno_location [call site] 00031
3 socket [call site] 00032
3 setsockopt [call site] 00033
3 close [call site] 00034
3 htons [call site] 00035
3 htonl [call site] 00036
3 inet_pton [call site] 00037
3 fprintf [call site] 00038
3 close [call site] 00039
3 bind [call site] 00040
3 close [call site] 00041
3 listen [call site] 00042
3 close [call site] 00043
2 modbus_tcp_accept [function] [call site] 00044
3 __errno_location [call site] 00045
3 accept4 [call site] 00046
3 fprintf [call site] 00047
3 close [call site] 00048
3 __errno_location [call site] 00049
3 inet_ntop [call site] 00050
3 fprintf [call site] 00051
3 printf [call site] 00052
2 modbus_receive [function] [call site] 00053
3 __errno_location [call site] 00054
2 close [call site] 00055
2 modbus_mapping_free [function] [call site] 00056
2 modbus_close [function] [call site] 00057
2 modbus_free [function] [call site] 00058
1 pthread_join [call site] 00059