Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique Reachable Functions	All non-covered Complexity	All Reachable Complexity	Function Name	Function Callsite	Blocked Branch
None	2	2	coap_log_impl	call site: 00007	/src/libcoap/src/coap_debug.c:1307
None	2	2	coap_split_uri_sub	call site: 00027	/src/libcoap/src/coap_uri.c:128
None	2	2	coap_split_uri_sub	call site: 00030	/src/libcoap/src/coap_uri.c:134
None	2	2	coap_split_uri_sub	call site: 00033	/src/libcoap/src/coap_uri.c:140
None	2	2	coap_split_uri_sub	call site: 00036	/src/libcoap/src/coap_uri.c:146
None	2	2	coap_split_uri_sub	call site: 00040	/src/libcoap/src/coap_uri.c:152
None	0	0	coap_log_level_desc	call site: 00019	/src/libcoap/src/coap_debug.c:126
None	0	0	coap_split_uri_sub	call site: 00002	/src/libcoap/src/coap_uri.c:77
None	0	0	coap_split_uri_sub	call site: 00002	/src/libcoap/src/coap_uri.c:87

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           coap_split_uri

[function] [call site] 00001


             coap_split_uri_sub

[function] [call site] 00002


               strlen

[call site] 00003


               memcmp

[call site] 00004


               coap_get_log_level

[function] [call site] 00005


               coap_log_impl

[function] [call site] 00006


                 pthread_mutex_lock

[call site] 00007


                 vsnprintf

[call site] 00008


                 coap_ticks

[function] [call site] 00009


                   clock_gettime

[call site] 00010


                 print_timestamp

[function] [call site] 00011


                   coap_ticks_to_rt

[function] [call site] 00012


                   localtime

[call site] 00013


                   strftime

[call site] 00014


                   coap_ticks_to_rt_us

[function] [call site] 00015


                   snprintf

[call site] 00016


                 fprintf

[call site] 00017


                 fprintf

[call site] 00018


                 coap_log_level_desc

[function] [call site] 00019


                   snprintf

[call site] 00020


                 fprintf

[call site] 00021


                 vfprintf

[call site] 00022


                 fflush

[call site] 00023


                 pthread_mutex_unlock

[call site] 00024


               coap_get_log_level

[function] [call site] 00025


               coap_log_impl

[function] [call site] 00026


               coap_dtls_is_supported

[function] [call site] 00027


               coap_get_log_level

[function] [call site] 00028


               coap_log_impl

[function] [call site] 00029


               coap_tcp_is_supported

[function] [call site] 00030


               coap_get_log_level

[function] [call site] 00031


               coap_log_impl

[function] [call site] 00032


               coap_tls_is_supported

[function] [call site] 00033


               coap_get_log_level

[function] [call site] 00034


               coap_log_impl

[function] [call site] 00035


               coap_ws_is_supported

[function] [call site] 00036


                 coap_tcp_is_supported

[function] [call site] 00037


               coap_get_log_level

[function] [call site] 00038


               coap_log_impl

[function] [call site] 00039


               coap_wss_is_supported

[function] [call site] 00040


                 coap_tls_is_supported

[function] [call site] 00041


               coap_get_log_level

[function] [call site] 00042


               coap_log_impl

[function] [call site] 00043


               coap_get_log_level

[function] [call site] 00044


               coap_log_impl

[function] [call site] 00045


               __ctype_b_loc

[call site] 00046