Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity	Unique Reachable Complexities	Unique Reachable Functions	All non-covered Complexity	All Reachable Complexity	Function Name	Function Callsite	Blocked Branch
133	136	2 : View List ['nxt_process_arguments', 'nxt_log_start']	133	136	nxt_lib_start	call site: 00064	/src/unit/src/nxt_lib.c:113
48	48	1 : View List ['nxt_lvlhsh_bucket_convertion_insert']	48	48	nxt_lvlhsh_level_convertion_insert	call site: 00077	/src/unit/src/nxt_lvlhsh.c:526
6	6	3 : View List ['open64', 'close', 'read']	8	15	nxt_random_stir	call site: 00058	/src/unit/src/nxt_random.c:85
6	6	3 : View List ['open64', 'dup2', 'close']	6	6	nxt_stderr_start	call site: 00003	/src/unit/src/nxt_file.c:611
5	5	1 : View List ['nxt_thread_time_shared']	5	5	nxt_thread_time_update	call site: 00015	/src/unit/src/nxt_thread_time.c:52
2	7	2 : View List ['nxt_thread_tid', 'gettimeofday']	2	9	nxt_random_stir	call site: 00059	/src/unit/src/nxt_random.c:94
0	142	1 : View List ['nxt_mp_alloc_large']	0	142	nxt_mp_get	call site: 00099	/src/unit/src/nxt_mp.c:1005
0	0	None	16	43	nxt_vsprintf	call site: 00000	/src/unit/src/nxt_sprintf.c:302
0	0	None	16	43	nxt_vsprintf	call site: 00000	/src/unit/src/nxt_sprintf.c:310
0	0	None	16	43	nxt_vsprintf	call site: 00000	/src/unit/src/nxt_sprintf.c:316
0	0	None	16	43	nxt_vsprintf	call site: 00000	/src/unit/src/nxt_sprintf.c:543
0	0	None	14	128	nxt_strerror_start	call site: 00021	/src/unit/src/nxt_errno.c:71

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           nxt_lib_start

[function] [call site] 00001


             nxt_stderr_start

[function] [call site] 00002


               fcntl64

[call site] 00003


               fcntl64

[call site] 00004


               open64

[call site] 00005


               dup2

[call site] 00006


               close

[call site] 00007


             nxt_log_start

[function] [call site] 00008


             getpid

[call site] 00009


             getppid

[call site] 00010


             geteuid

[call site] 00011


             getegid

[call site] 00012


             mallopt

[call site] 00013


             pthread_self

[call site] 00014


             nxt_thread_time_update

[function] [call site] 00015


               nxt_thread_time_shared

[function] [call site] 00016


               nxt_monotonic_time

[function] [call site] 00017


                 clock_gettime

[call site] 00018


             nxt_strerror_start

[function] [call site] 00019


               __errno_location

[call site] 00020


               strerror

[call site] 00021


               strlen

[call site] 00022


               __errno_location

[call site] 00023


               memcmp

[call site] 00024


               nxt_malloc

[function] [call site] 00025


                 nxt_malloc_log

[function] [call site] 00026


                 nxt_malloc_log

[function] [call site] 00027


                 nxt_log_moderate_allow

[function] [call site] 00028


                   nxt_thread_time

[function] [call site] 00029


                     nxt_thread_realtime_update

[function] [call site] 00030


                       nxt_realtime

[function] [call site] 00031


                         clock_gettime

[call site] 00032


                       nxt_realtime

[function] [call site] 00033


                   nxt_thread_spin_lock

[function] [call site] 00034


                     pthread_yield

[call site] 00035


                   nxt_thread_spin_unlock

[function] [call site] 00036


                   nxt_log_moderate_timer_handler

[function] [call site] 00037


                     nxt_thread_spin_lock

[function] [call site] 00038


                     nxt_thread_time

[function] [call site] 00039


                     nxt_thread_spin_unlock

[function] [call site] 00040


                   nxt_timer_add

[function] [call site] 00041

abs

[call site] 00042


                     nxt_timer_change

[function] [call site] 00043


                       nxt_timer_changes_commit

[function] [call site] 00044


                         nxt_rbtree_delete

[function] [call site] 00045


                           nxt_rbtree_delete_fixup

[function] [call site] 00046


                         nxt_rbtree_insert

[function] [call site] 00047


                           nxt_rbtree_insert_fixup

[function] [call site] 00048


                     nxt_timer_change

[function] [call site] 00049


                 __errno_location

[call site] 00050


               strerror

[call site] 00051


               strlen

[call site] 00052


               nxt_runtime_strerror

[function] [call site] 00053


             sysconf

[call site] 00054


             nxt_thread_spin_init

[function] [call site] 00055


             nxt_random_init

[function] [call site] 00056


               nxt_random_stir

[function] [call site] 00057


                 getrandom

[call site] 00058


                 close

[call site] 00059


                 gettimeofday

[call site] 00060


                 nxt_thread_tid

[function] [call site] 00061


                   syscall

[call site] 00062


                 nxt_random_add

[function] [call site] 00063


             getpagesize

[call site] 00064


             nxt_process_arguments

[function] [call site] 00065


               strlen

[call site] 00066


               nxt_malloc

[function] [call site] 00067


               nxt_malloc

[function] [call site] 00068


               strlen

[call site] 00069


               nxt_malloc

[function] [call site] 00070


               strlen

[call site] 00071


             nxt_log_start

[function] [call site] 00072


           nxt_http_fields_hash

[function] [call site] 00073


             nxt_lvlhsh_insert

[function] [call site] 00074


               nxt_lvlhsh_bucket_insert

[function] [call site] 00075


                 nxt_lvlhsh_convert_bucket_to_level

[function] [call site] 00076


                   nxt_lvlhsh_level_convertion_insert

[function] [call site] 00077


                     nxt_lvlhsh_new_bucket

[function] [call site] 00078


                     nxt_lvlhsh_bucket_convertion_insert

[function] [call site] 00079


                       nxt_lvlhsh_convert_bucket_to_level

[function] [call site] 00080


                         nxt_lvlhsh_free_level

[function] [call site] 00081


                       nxt_lvlhsh_level_insert

[function] [call site] 00082


                         nxt_lvlhsh_bucket_insert

[function] [call site] 00083


                           nxt_lvlhsh_level_insert

[function] [call site] 00084


                             nxt_lvlhsh_level_insert

[function] [call site] 00085


                               nxt_lvlhsh_new_bucket

[function] [call site] 00086


                           nxt_lvlhsh_new_bucket

[function] [call site] 00087


                       nxt_lvlhsh_new_bucket

[function] [call site] 00088


               nxt_lvlhsh_level_insert

[function] [call site] 00089


               nxt_lvlhsh_new_bucket

[function] [call site] 00090


           nxt_http_parse_fuzz

[function] [call site] 00091


             nxt_mp_create

[function] [call site] 00092


               nxt_zalloc

[function] [call site] 00093


                 nxt_malloc

[function] [call site] 00094


               nxt_rbtree_init

[function] [call site] 00095


               nxt_mp_rbtree_compare

[function] [call site] 00096


             nxt_http_parse_request_init

[function] [call site] 00097


               nxt_list_create

[function] [call site] 00098


                 nxt_mp_get

[function] [call site] 00099


                   nxt_mp_get_small

[function] [call site] 00100


                     nxt_thread_tid

[function] [call site] 00101


                     raise

[call site] 00102


                     nxt_mp_alloc_page

[function] [call site] 00103


                       nxt_mp_alloc_cluster

[function] [call site] 00104


                         nxt_zalloc

[function] [call site] 00105


                         nxt_memalign

[function] [call site] 00106


                           posix_memalign

[call site] 00107


                           nxt_malloc_log

[function] [call site] 00108


                           nxt_log_moderate_allow

[function] [call site] 00109


                         nxt_free

[function] [call site] 00110


                           nxt_malloc_log

[function] [call site] 00111


                         nxt_rbtree_insert

[function] [call site] 00112


                   nxt_mp_alloc_large

[function] [call site] 00113


                     nxt_thread_tid

[function] [call site] 00114


                     raise

[call site] 00115


                     nxt_malloc

[function] [call site] 00116


                     nxt_memalign

[function] [call site] 00117


                     nxt_free

[function] [call site] 00118


                     nxt_memalign

[function] [call site] 00119


                     nxt_rbtree_insert

[function] [call site] 00120


             nxt_http_parse_request

[function] [call site] 00121


               nxt_http_parse_request_line

[function] [call site] 00122


                 nxt_http_parse_unusual_target

[function] [call site] 00123


                 memcmp

[call site] 00124


                 memcmp

[call site] 00125


                 nxt_http_parse_complex_target

[function] [call site] 00126


                   nxt_mp_alloc

[function] [call site] 00127


                     nxt_mp_alloc_small

[function] [call site] 00128


                       nxt_thread_tid

[function] [call site] 00129


                       raise

[call site] 00130


                       nxt_mp_alloc_page

[function] [call site] 00131


                       nxt_mp_alloc_page

[function] [call site] 00132


                     nxt_mp_alloc_large

[function] [call site] 00133


                 nxt_http_parse_field_name

[function] [call site] 00134


                   nxt_http_parse_field_name

[function] [call site] 00135


                     nxt_http_parse_field_value

[function] [call site] 00136


                       nxt_http_parse_field_value

[function] [call site] 00137


                         nxt_http_lookup_field_end

[function] [call site] 00138


                         nxt_http_parse_field_value

[function] [call site] 00139


                           nxt_http_parse_field_end

[function] [call site] 00140


                             nxt_http_parse_field_end

[function] [call site] 00141


                               nxt_list_add

[function] [call site] 00142


                                 nxt_mp_get

[function] [call site] 00143


                               nxt_http_parse_field_name

[function] [call site] 00144


                                 nxt_http_parse_field_end

[function] [call site] 00145


                 nxt_http_parse_field_name

[function] [call site] 00146


                 memcmp

[call site] 00147


             nxt_http_fields_process

[function] [call site] 00148


               nxt_lvlhsh_find

[function] [call site] 00149


                 nxt_lvlhsh_bucket_find

[function] [call site] 00150


                 nxt_lvlhsh_level_find

[function] [call site] 00151


                   nxt_lvlhsh_bucket_find

[function] [call site] 00152


                   nxt_lvlhsh_level_find

[function] [call site] 00153


             nxt_mp_destroy

[function] [call site] 00154


               nxt_thread_tid

[function] [call site] 00155


               raise

[call site] 00156


               nxt_rbtree_destroy_next

[function] [call site] 00157


               nxt_free

[function] [call site] 00158


               nxt_free

[function] [call site] 00159


               nxt_free

[function] [call site] 00160