High level conclusions

Fuzzers reach 16.70% of cyclomatic complexity.

Fuzzers reach 23.62% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

823 / 3483

Cyclomatic complexity statically reachable by fuzzers

4635 / 27740

Runtime code coverage of functions

741 / 3483

The following table shows data about each function in the project. The functions included in this table correspond to all functions that exist in the executables of the fuzzers. As such, there may be functions that are from third-party libraries.

For further technical details on the meaning of columns in the below table, please see the Glossary .

Func name	Functions filename	Args	Function call depth	Reached by Fuzzers	Runtime reached by Fuzzers	Combined reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

Fuzzer: h2o-fuzzer-url

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	7	17.0%
gold	[1:9]	6	14.6%
yellow	[10:29]	3	7.31%
greenyellow	[30:49]	1	2.43%
lawngreen	50+	24	58.5%
All colors	41	100

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
2	2	1 : View List ['strlen']	2	70	h2o_url_parse	call site: 00002	/src/h2o/lib/common/url.c:258
2	2	1 : View List ['posix_memalign']	2	2	h2o_mem_aligned_alloc	call site: 00022	/src/h2o/include/h2o/memory.h:449
0	0	None	0	38	h2o_mem_clear_pool	call site: 00029	/src/h2o/lib/common/memory.c:165
0	0	None	0	4	h2o_vector__expand	call site: 00035	/src/h2o/lib/common/memory.c:548
0	0	None	0	0	h2o_mem_alloc	call site: 00020	/src/h2o/include/h2o/memory.h:442
0	0	None	0	0	h2o_mem_realloc	call site: 00040	/src/h2o/include/h2o/memory.h:461
0	0	None	0	0	h2o_memcpy	call site: 00026	/src/h2o/include/h2o/memory.h:418
0	0	None	0	0	h2o_concat_list	call site: 00017	/src/h2o/lib/common/string.c:574

Runtime coverage analysis

Covered functions

19

Functions that are reachable but not covered

7

Reachable functions

26

Percentage of reachable functions covered

73.08%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/driver_url.cc	1
lib/common/memory.c	6
lib/common/url.c	4
include/h2o/memory.h	8
lib/common/string.c	1

Fuzzer: h2o-fuzzer-http2

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	3633	75.4%
gold	[1:9]	260	5.39%
yellow	[10:29]	32	0.66%
greenyellow	[30:49]	19	0.39%
lawngreen	50+	871	18.0%
All colors	4815	100

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
1251	1251	5 : View List ['h2o_socketpool_detach', 'h2o_memis.7281', 'h2o_httpclient__h2_on_connect', 'on_connect_error', 'memcmp']	1251	1627	on_pool_connect	call site: 02132	/src/h2o/lib/common/httpclient.c:132
602	602	1 : View List ['shutdown_ssl']	602	602	h2o_socket_close	call site: 01078	/src/h2o/lib/common/socket.c:628
451	493	6 : View List ['zerocopy_buffers_push', 'h2o_mem_free_recycle', 'flatten_sendvec', 'h2o_iovec_init', 'generate_tls_records', 'dispose_ssl_output_buffer']	451	807	write_core	call site: 01233	/src/h2o/lib/common/socket/evloop.c.h:207
80	89	3 : View List ['change_epoll_mode', 'handle_zerocopy_notification', 'shutdown']	86	95	evloop_do_on_socket_close	call site: 01169	/src/h2o/lib/common/socket/evloop/epoll.c.h:291
46	46	2 : View List ['h2o_get_compressible_types', 'h2o_iovec_init.2127']	46	631	create_generator	call site: 00000	/src/h2o/lib/handler/file.c:342
25	25	1 : View List ['do_send_from_pipe']	25	25	do_proceed	call site: 00000	/src/h2o/lib/core/proxy.c:405
22	22	3 : View List ['h2o_url_get_port', '__bswap_16.420', 'h2o_hostinfo_aton']	22	22	detect_target_type	call site: 00530	/src/h2o/lib/common/socketpool.c:154
21	21	1 : View List ['prepare_for_latency_optimized_write']	21	21	h2o_socket_do_prepare_for_latency_optimized_write	call site: 02504	/src/h2o/lib/common/socket.c:781
18	1127	7 : View List ['process_request', 'set_req_body_state', 'execute_or_enqueue_request', 'h2o_iovec_init.3284', 'h2o_add_header', 'h2o_req_should_forward_expect.3306', 'h2o_send_informational']	18	1195	handle_incoming_request	call site: 00000	/src/h2o/lib/http2/connection.c:696
10	10	1 : View List ['init_write_buf']	10	12	do_write	call site: 01340	/src/h2o/lib/common/socket/evloop.c.h:425
9	9	2 : View List ['getsockopt', 'h2o_socket_get_error_string']	9	896	run_socket	call site: 04779	/src/h2o/lib/common/socket/evloop.c.h:859
6	6	1 : View List ['sendvec_core']	224	256	write_pending	call site: 04751	/src/h2o/lib/common/socket/evloop.c.h:332

Runtime coverage analysis

Covered functions

518

Functions that are reachable but not covered

285

Reachable functions

514

Percentage of reachable functions covered

44.55%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/driver.cc	8
lib/common/multithread.c	10
/usr/include/stdlib.h	1
lib/core/config.c	12
include/h2o/memory.h	19
include/h2o/linklist.h	6
lib/handler/mimemap.c	34
lib/common/memory.c	22
include/h2o/string_.h	4
deps/klib/khash.h	1
lib/common/socketpool.c	24
lib/core/configurator.c	66
lib/common/url.c	10
lib/common/string.c	10
deps/yoml/yoml.h	2
fuzz/driver_common.cc	4
lib/core/headers.c	7
lib/core/request.c	21
include/h2o.h	17
lib/common/socket.c	68
lib/common/hostinfo.c	10
include/h2o/url.h	4
/usr/include/x86_64-linux-gnu/bits/byteswap.h	2
lib/common/balancer/roundrobin.c	1
include/h2o/socketpool.h	1
lib/handler/proxy.c	1
lib/handler/access_log.c	1
lib/handler/file.c	1
lib/common/socket/evloop/epoll.c.h	8
lib/common/socket/evloop.c.h	30
lib/common/timerwheel.c	9
lib/core/context.c	11
lib/common/filecache.c	2
include/h2o/timerwheel.h	3
include/h2o/socket/evloop.h	5
lib/http2/connection.c	23
include/h2o/http2_internal.h	10
lib/http2/scheduler.c	20
include/h2o/http2_common.h	7
lib/http2/stream.c	7
include/h2o/http2_scheduler.h	2
lib/http2/frame.c	5
lib/common/file.c	1
include/h2o/socket.h	6
lib/common/time.c	6
deps/picotls/lib/picotls.c	187
lib/http2/cache_digests.c	3
lib/http2/hpack.c	22
lib/common/token.c	1
lib/common/cache.c	15
lib/http2/casper.c	1
deps/picotls/include/picotls.h	10
lib/core/proxy.c	12
lib/common/httpclient.c	9
deps/quicly/include/quicly/frame.h	22
deps/cloexec/cloexec.c	1
deps/picotls/lib/hpke.c	8
lib/common/../../deps/ssl-conservatory/openssl/openssl_hostname_validation.c	7
/usr/include/openssl/x509v3.h	3
include/h2o/hostinfo.h	1
lib/common/http1client.c	17
deps/picohttpparser/picohttpparser.c	8
lib/common/token_table.h	7
include/h2o/httpclient.h	1
lib/common/http2client.c	33
lib/common/http3client.c	11
lib/http3/common.c	12
lib/http3/qpack.c	24
deps/quicly/include/quicly.h	11
include/h2o/http3_internal.h	6
deps/quicly/lib/quicly.c	129
quicly-tracer.h	10
deps/quicly/lib/sendstate.c	8
deps/quicly/include/quicly/ranges.h	2
deps/quicly/lib/recvstate.c	3
deps/quicly/include/quicly/linklist.h	4
deps/quicly/include/quicly/maxsender.h	6
deps/quicly/include/quicly/loss.h	7
deps/quicly/lib/sentmap.c	8
deps/quicly/lib/remote_cid.c	3
deps/quicly/lib/retire_cid.c	3
deps/quicly/lib/cc-reno.c	1
deps/quicly/lib/local_cid.c	10
deps/quicly/include/quicly/cid.h	1
deps/quicly/include/quicly/sentmap.h	6
deps/quicly/include/quicly/pacer.h	5
deps/quicly/lib/rate.c	6
deps/quicly/lib/ranges.c	6
deps/quicly/lib/streambuf.c	3
deps/quicly/include/quicly/streambuf.h	2
deps/quicly/include/quicly/sendstate.h	2
deps/picotls/include/picotls/../picotls.h	2
deps/quicly/include/quicly/cc.h	1
deps/quicly/lib/loss.c	2
deps/quicly/lib/frame.c	3
deps/quicly/include/quicly/recvstate.h	1
deps/quicly/include/quicly/local_cid.h	1
deps/quicly/include/quicly/retire_cid.h	1
deps/quicly/include/quicly/rate.h	1
/usr/include/x86_64-linux-gnu/bits/socket.h	1
include/h2o/multithread.h	1
include/h2o/http3_common.h	1
lib/core/util.c	4
lib/handler/headers_util.c	7
include/h2o/time_.h	2

Fuzzer: h2o-fuzzer-http1

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	3717	72.7%
gold	[1:9]	253	4.95%
yellow	[10:29]	12	0.23%
greenyellow	[30:49]	28	0.54%
lawngreen	50+	1096	21.4%
All colors	5106	100

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
1251	1251	5 : View List ['h2o_socketpool_detach', 'h2o_memis.7281', 'h2o_httpclient__h2_on_connect', 'on_connect_error', 'memcmp']	1251	1627	on_pool_connect	call site: 02222	/src/h2o/lib/common/httpclient.c:132
602	602	1 : View List ['shutdown_ssl']	602	602	h2o_socket_close	call site: 00908	/src/h2o/lib/common/socket.c:628
451	493	6 : View List ['zerocopy_buffers_push', 'h2o_mem_free_recycle', 'flatten_sendvec', 'h2o_iovec_init', 'generate_tls_records', 'dispose_ssl_output_buffer']	451	807	write_core	call site: 01014	/src/h2o/lib/common/socket/evloop.c.h:207
80	89	3 : View List ['change_epoll_mode', 'handle_zerocopy_notification', 'shutdown']	86	95	evloop_do_on_socket_close	call site: 00948	/src/h2o/lib/common/socket/evloop/epoll.c.h:291
46	46	2 : View List ['h2o_get_compressible_types', 'h2o_iovec_init.2127']	46	631	create_generator	call site: 00000	/src/h2o/lib/handler/file.c:342
25	25	1 : View List ['do_send_from_pipe']	25	25	do_proceed	call site: 00000	/src/h2o/lib/core/proxy.c:405
22	22	3 : View List ['h2o_url_get_port', '__bswap_16.420', 'h2o_hostinfo_aton']	22	22	detect_target_type	call site: 00530	/src/h2o/lib/common/socketpool.c:154
21	21	1 : View List ['prepare_for_latency_optimized_write']	21	21	h2o_socket_do_prepare_for_latency_optimized_write	call site: 02591	/src/h2o/lib/common/socket.c:781
18	1127	7 : View List ['process_request', 'set_req_body_state', 'execute_or_enqueue_request', 'h2o_iovec_init.3284', 'h2o_add_header', 'h2o_req_should_forward_expect.3306', 'h2o_send_informational']	18	1195	handle_incoming_request	call site: 04855	/src/h2o/lib/http2/connection.c:696
10	10	1 : View List ['init_write_buf']	10	12	do_write	call site: 01121	/src/h2o/lib/common/socket/evloop.c.h:425
9	9	2 : View List ['getsockopt', 'h2o_socket_get_error_string']	9	896	run_socket	call site: 05070	/src/h2o/lib/common/socket/evloop.c.h:859
6	6	1 : View List ['sendvec_core']	224	256	write_pending	call site: 05042	/src/h2o/lib/common/socket/evloop.c.h:332

Runtime coverage analysis

Covered functions

567

Functions that are reachable but not covered

401

Reachable functions

740

Percentage of reachable functions covered

45.81%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/driver.cc	8
lib/common/multithread.c	10
/usr/include/stdlib.h	1
lib/core/config.c	12
include/h2o/memory.h	19
include/h2o/linklist.h	6
lib/handler/mimemap.c	34
lib/common/memory.c	22
include/h2o/string_.h	4
deps/klib/khash.h	1
lib/common/socketpool.c	24
lib/core/configurator.c	66
lib/common/url.c	10
lib/common/string.c	13
deps/yoml/yoml.h	2
fuzz/driver_common.cc	4
lib/core/headers.c	7
lib/core/request.c	24
include/h2o.h	21
lib/common/socket.c	68
lib/common/hostinfo.c	10
include/h2o/url.h	4
/usr/include/x86_64-linux-gnu/bits/byteswap.h	2
lib/common/balancer/roundrobin.c	1
include/h2o/socketpool.h	1
lib/handler/proxy.c	1
lib/handler/access_log.c	1
lib/handler/file.c	1
lib/common/socket/evloop/epoll.c.h	8
lib/common/socket/evloop.c.h	30
lib/common/timerwheel.c	9
lib/core/context.c	11
lib/common/filecache.c	2
include/h2o/timerwheel.h	3
include/h2o/socket/evloop.h	5
lib/http1.c	32
deps/picotls/include/picotls.h	10
deps/picotls/lib/picotls.c	187
lib/common/rand.c	2
deps/picotls/lib/openssl.c	1
lib/common/token.c	1
lib/common/time.c	6
include/h2o/socket.h	6
include/h2o/time_.h	2
deps/picohttpparser/picohttpparser.c	10
lib/http2/connection.c	30
include/h2o/http2_internal.h	14
lib/http2/scheduler.c	21
include/h2o/http2_common.h	10
lib/http2/stream.c	9
include/h2o/http2_scheduler.h	2
lib/http2/frame.c	7
lib/common/file.c	1
lib/http2/cache_digests.c	3
lib/http2/hpack.c	22
lib/common/cache.c	15
lib/http2/casper.c	1
lib/core/proxy.c	12
lib/common/httpclient.c	9
deps/quicly/include/quicly/frame.h	22
deps/cloexec/cloexec.c	1
deps/picotls/lib/hpke.c	8
lib/common/../../deps/ssl-conservatory/openssl/openssl_hostname_validation.c	7
/usr/include/openssl/x509v3.h	3
include/h2o/hostinfo.h	1
lib/common/http1client.c	17
lib/common/token_table.h	7
include/h2o/httpclient.h	1
lib/common/http2client.c	33
lib/common/http3client.c	11
lib/http3/common.c	12
lib/http3/qpack.c	24
deps/quicly/include/quicly.h	11
include/h2o/http3_internal.h	6
deps/quicly/lib/quicly.c	129
quicly-tracer.h	10
deps/quicly/lib/sendstate.c	8
deps/quicly/include/quicly/ranges.h	2
deps/quicly/lib/recvstate.c	3
deps/quicly/include/quicly/linklist.h	4
deps/quicly/include/quicly/maxsender.h	6
deps/quicly/include/quicly/loss.h	7
deps/quicly/lib/sentmap.c	8
deps/quicly/lib/remote_cid.c	3
deps/quicly/lib/retire_cid.c	3
deps/quicly/lib/cc-reno.c	1
deps/quicly/lib/local_cid.c	10
deps/quicly/include/quicly/cid.h	1
deps/quicly/include/quicly/sentmap.h	6
deps/quicly/include/quicly/pacer.h	5
deps/quicly/lib/rate.c	6
deps/quicly/lib/ranges.c	6
deps/quicly/lib/streambuf.c	3
deps/quicly/include/quicly/streambuf.h	2
deps/quicly/include/quicly/sendstate.h	2
deps/picotls/include/picotls/../picotls.h	2
deps/quicly/include/quicly/cc.h	1
deps/quicly/lib/loss.c	2
deps/quicly/lib/frame.c	3
deps/quicly/include/quicly/recvstate.h	1
deps/quicly/include/quicly/local_cid.h	1
deps/quicly/include/quicly/retire_cid.h	1
deps/quicly/include/quicly/rate.h	1
/usr/include/x86_64-linux-gnu/bits/socket.h	1
include/h2o/multithread.h	1
include/h2o/http3_common.h	1
lib/core/util.c	4
lib/handler/headers_util.c	7
lib/./probes_.h	2

Fuzzer: h2o-fuzzer-http3

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	947	57.4%
gold	[1:9]	258	15.6%
yellow	[10:29]	26	1.57%
greenyellow	[30:49]	3	0.18%
lawngreen	50+	415	25.1%
All colors	1649	100

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
1251	1251	5 : View List ['h2o_socketpool_detach', 'h2o_memis.7281', 'h2o_httpclient__h2_on_connect', 'on_connect_error', 'memcmp']	1251	1627	on_pool_connect	call site: 00000	/src/h2o/lib/common/httpclient.c:132
602	602	1 : View List ['shutdown_ssl']	602	602	h2o_socket_close	call site: 00000	/src/h2o/lib/common/socket.c:628
451	493	6 : View List ['zerocopy_buffers_push', 'h2o_mem_free_recycle', 'flatten_sendvec', 'h2o_iovec_init', 'generate_tls_records', 'dispose_ssl_output_buffer']	451	807	write_core	call site: 01392	/src/h2o/lib/common/socket/evloop.c.h:207
80	89	3 : View List ['change_epoll_mode', 'handle_zerocopy_notification', 'shutdown']	86	95	evloop_do_on_socket_close	call site: 00000	/src/h2o/lib/common/socket/evloop/epoll.c.h:291
46	46	2 : View List ['h2o_get_compressible_types', 'h2o_iovec_init.2127']	46	631	create_generator	call site: 00000	/src/h2o/lib/handler/file.c:342
42	69	3 : View List ['decode_int', 'qpack_table_total_inserts', 'decoder_link_blocked']	42	69	parse_decode_context	call site: 00000	/src/h2o/lib/http3/qpack.c:758
29	29	1 : View List ['check_run_blocked']	32	41	pre_dispose_request	call site: 00000	/src/h2o/lib/http3/server.c:459
25	25	1 : View List ['do_send_from_pipe']	25	25	do_proceed	call site: 00000	/src/h2o/lib/core/proxy.c:405
22	22	3 : View List ['h2o_url_get_port', '__bswap_16.420', 'h2o_hostinfo_aton']	22	22	detect_target_type	call site: 00874	/src/h2o/lib/common/socketpool.c:154
19	19	1 : View List ['req_scheduler_conn_blocked']	19	19	scheduler_update_state	call site: 00000	/src/h2o/lib/http3/server.c:2076
9	9	2 : View List ['getsockopt', 'h2o_socket_get_error_string']	9	896	run_socket	call site: 01596	/src/h2o/lib/common/socket/evloop.c.h:859
8	8	1 : View List ['h2o_socket_notify_write']	8	8	h2o_socket_connect	call site: 00000	/src/h2o/lib/common/socket/evloop.c.h:769

Runtime coverage analysis

Covered functions

504

Functions that are reachable but not covered

468

Reachable functions

774

Percentage of reachable functions covered

39.53%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/driver_h3.cc	2
lib/common/multithread.c	8
/usr/include/stdlib.h	1
lib/handler/access_log.c	4
lib/core/logconf.c	4
include/h2o/memory.h	13
lib/common/string.c	6
lib/common/memory.c	21
include/h2o/string_.h	4
lib/common/token_table.h	1
lib/common/serverutil.c	2
/usr/include/x86_64-linux-gnu/sys/stat.h	1
lib/core/config.c	12
include/h2o/linklist.h	6
lib/handler/mimemap.c	34
deps/klib/khash.h	1
lib/common/socketpool.c	7
lib/core/configurator.c	66
lib/common/url.c	6
deps/yoml/yoml.h	2
fuzz/driver_common.cc	3
lib/common/hostinfo.c	3
include/h2o/url.h	1
/usr/include/x86_64-linux-gnu/bits/byteswap.h	2
lib/common/balancer/roundrobin.c	1
include/h2o/socketpool.h	1
lib/handler/proxy.c	1
lib/handler/file.c	1
lib/common/socket/evloop/epoll.c.h	6
lib/common/socket/evloop.c.h	19
lib/common/timerwheel.c	9
lib/core/context.c	7
lib/common/socket.c	19
lib/common/filecache.c	2
include/h2o/timerwheel.h	3
include/h2o/socket/evloop.h	4
include/h2o/http3_internal.h	8
lib/http3/server.c	5
lib/http3/common.c	12
deps/quicly/lib/cc-reno.c	1
fuzz/quicly_mock.c	20
lib/http3/qpack.c	5
deps/quicly/include/quicly.h	10
deps/quicly/lib/sendstate.c	6
deps/quicly/include/quicly/ranges.h	2
deps/quicly/lib/recvstate.c	4
deps/picotls/include/picotls/../picotls.h	2
deps/picotls/lib/picotls.c	59
deps/picotls/include/picotls.h	9
deps/quicly/lib/ranges.c	6
lib/common/file.c	1
include/h2o.h	1
lib/common/rand.c	2
deps/picotls/lib/openssl.c	1
/usr/include/x86_64-linux-gnu/bits/socket.h	1
include/h2o/multithread.h	1
deps/quicly/include/quicly/recvstate.h	1
include/h2o/socket.h	5

Optimal target analysis

Remaining optimal interesting functions

The following table shows a list of functions that are optimal targets. Optimal targets are identified by finding the functions that in combination, yield a high code coverage.

Func name	Functions filename	Arg count	Args	Function depth	hitcount	instr count	bb count	cyclomatic complexity	Reachable functions	Incoming references	total cyclomatic complexity	Unreached complexity
ptls_init_compressed_certificate	/src/h2o/deps/picotls/lib/certificate_compression.c	5	['N/A', 'N/A', 'size_t', 'N/A', 'size_t']	13	0	58	11	5	249	0	6298	6260
on_send_informational_complete	/src/h2o/lib/http1.c	2	['N/A', 'N/A']	39	0	55	10	5	871	0	5413	2841
yaml_parser_load	/src/h2o/deps/yaml/src/loader.c	2	['N/A', 'N/A']	13	0	141	30	10	95	0	1850	1840
yaml_emitter_dump	/src/h2o/deps/yaml/src/dumper.c	2	['N/A', 'N/A']	13	0	160	28	10	73	0	1200	1155
h2o_accept_setup_redis_ssl_resumption	/src/h2o/lib/core/util.c	4	['N/A', 'short', 'int', 'N/A']	28	0	28	3	2	477	0	2558	722
decompress_certificate	/src/h2o/deps/picotls/lib/certificate_compression.c	6	['N/A', 'N/A', 'short', 'N/A', 'size_t', 'N/A']	5	0	55	11	5	44	0	640	638
h2o_proxy_register_configurator	/src/h2o/lib/handler/configurator/proxy.c	1	['N/A']	28	0	84	3	2	408	0	1800	464

Implementing fuzzers that target the above functions will improve reachability such that it becomes:

Functions statically reachable by fuzzers

1771 / 3483

Cyclomatic complexity statically reachable by fuzzers

18401 / 27740

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

Func name	Functions filename	Args	Function call depth	Reached by Fuzzers	Runtime reached by Fuzzers	Combined reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

This sections provides heuristics that can be used as input to a fuzz engine when running a given fuzz target. The current focus is on providing input that is usable by libFuzzer.

fuzz/driver_url.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['h2o_mem_aligned_alloc', 'LLVMFuzzerTestOneInput', 'h2o_vector__expand', 'h2o_mem_alloc_pool_aligned']

fuzz/driver.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['h2o_buffer_append', 'start_connect', 'write_vecs', 'close_response', 'ptls_log__recalc_point', 'h2o_socket_do_prepare_for_latency_optimized_write', 'h2o_socketpool_connect', 'h2o_configurator__init_core', 'do_dispose_socket']

fuzz/driver.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['h2o_buffer_append', 'start_connect', 'write_vecs', 'close_response', 'h2o_socket_do_prepare_for_latency_optimized_write', 'h2o_socketpool_connect', 'h2o_configurator__init_core', 'h2o_socket_setpeername', 'build_request']

fuzz/driver_h3.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['h2o__lcstris_core', 'write_vecs', 'on_read_core', 'h2o_configurator__init_core', 'h2o_mem_realloc', 'h2o_append_to_null_terminated_list', 'h2o_quic_send']

This section shows analysis of runtime coverage data.

For futher technical details on how this section is generated, please see the Glossary .

Complex functions with low coverage

Func name	Function total lines	Lines covered at runtime	percentage covered	Reached by fuzzers
h2o_filecache_open_file	42	23	54.76%	['h2o-fuzzer-http3', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1']
on_head	123	51	41.46%	['h2o-fuzzer-http3', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1']
h2o_httpclient_connect	47	14	29.78%	['h2o-fuzzer-http3', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1']
h2o_buffer_try_reserve	86	38	44.18%	['h2o-fuzzer-http3', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1']
write_core	54	5	9.259%	['h2o-fuzzer-http3', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1']
h2o_socketpool_connect	76	31	40.78%	['h2o-fuzzer-http3', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1']
create_generator	59	10	16.94%	['h2o-fuzzer-http3', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1']
send_headers	90	22	24.44%	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
h2o_socket_sendvec	33	17	51.51%	['h2o-fuzzer-http1']
kh_resize_h2o_quic_idmap	62	34	54.83%	['h2o-fuzzer-http3']
quicly_ranges_subtract	50	19	38.0%	['h2o-fuzzer-http3']
h2o_qpack_lookup_content_type	48	15	31.25%	['h2o-fuzzer-http3']
parse_decode_context	41	22	53.65%	['h2o-fuzzer-http3']
do_flatten_header	50	11	22.0%	['h2o-fuzzer-http3']
run_delayed	59	22	37.28%	['h2o-fuzzer-http3']

This section shows which files and directories are considered in this report. The main reason for showing this is fuzz introspector may include more code in the reasoning than is desired. This section helps identify if too many files/directories are included, e.g. third party code, which may be irrelevant for the threat model. In the event too much is included, fuzz introspector supports a configuration file that can exclude data from the report. See the following link for more information on how to create a config file: link

Files in report

Source file	Reached by	Covered by
	[]	[]
/src/h2o/include/h2o/http2_common.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/hiredis/hiredis.c	[]	[]
/src/h2o/lib/common/socket.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/libyrmcds/text_mode.c	[]	[]
/src/h2o/include/h2o/absprio.h	[]	[]
/src/h2o/lib/core/context.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/golombset/golombset.h	[]	[]
/src/h2o/deps/picotls/lib/openssl.c	['h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/deps/quicly/include/quicly/ranges.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/deps/quicly/lib/frame.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/libyrmcds/strerror.c	[]	[]
/src/h2o/deps/brotli/c/dec/./transform.h	[]	[]
/src/h2o/fuzz/quicly_mock.c	['h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/deps/quicly/include/quicly/local_cid.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/include/h2o/linklist.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/yaml/src/dumper.c	[]	[]
/src/h2o/deps/quicly/include/quicly/sentmap.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/brotli/c/enc/./././hash_forgetful_chain_inc.h	[]	[]
/src/h2o/lib/http2/frame.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/common/httpclient.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/handler/proxy.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/brotli/c/common/dictionary.c	[]	[]
/src/h2o/lib/handler/redirect.c	[]	[]
/src/h2o/include/h2o/hostinfo.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/include/h2o/url.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/http2/http2_debug_state.c	[]	[]
/src/h2o/deps/quicly/include/quicly/cid.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/brotli/c/enc/backward_references_hq.c	[]	[]
/src/h2o/lib/handler/configurator/reproxy.c	[]	[]
/src/h2o/deps/brotli/c/enc/./block_splitter_inc.h	[]	[]
/src/h2o/deps/brotli/c/enc/block_splitter.c	[]	[]
/src/h2o/deps/brotli/c/enc/././cluster_inc.h	[]	[]
/src/h2o/deps/yoml/yoml.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/deps/quicly/lib/streambuf.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/include/h2o.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/quicly/include/quicly/maxsender.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/handler/h2olog.c	[]	[]
/src/h2o/lib/handler/status/requests.c	[]	[]
/src/h2o/include/h2o/timerwheel.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/brotli/c/enc/./bit_cost_inc.h	[]	[]
/src/h2o/deps/quicly/include/quicly/cc.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/fuzz/driver_h3.cc	['h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/deps/hiredis/net.c	[]	[]
/src/h2o/lib/common/filecache.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/include/h2o/socketpool.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/quicly/lib/sentmap.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/handler/compress/gzip.c	[]	[]
/src/h2o/deps/quicly/lib/remote_cid.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/core/request.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/hiredis/sds.h	[]	[]
/src/h2o/deps/picotls/deps/cifra/src/curve25519.tweetnacl.c	[]	[]
/src/h2o/deps/picotls/lib/cifra/random.c	[]	[]
/src/h2o/deps/quicly/include/quicly/recvstate.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/lib/handler/configurator/http2_debug_state.c	[]	[]
/src/h2o/lib/common/hostinfo.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/deps/yaml/src/parser.c	[]	[]
/src/h2o/deps/picotls/deps/cifra/src/bitops.h	[]	[]
/src/h2o/deps/brotli/c/dec/huffman.c	[]	[]
/src/h2o/lib/http3/./../probes_.h	[]	[]
/src/h2o/deps/brotli/c/enc/./././hash_longest_match_inc.h	[]	[]
/src/h2o/deps/brotli/c/enc/literal_cost.c	[]	[]
/src/h2o/lib/http3/qpack.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/deps/hiredis/async_private.h	[]	[]
/src/h2o/lib/common/http2client.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/klib/khash.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/quicly/lib/loss.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/brotli/c/dec/decode.c	[]	[]
/src/h2o/lib/common/http1client.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/quicly/include/quicly/frame.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/handler/file.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/http3/common.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/cloexec/cloexec.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/usr/include/x86_64-linux-gnu/sys/stat.h	['h2o-fuzzer-http3']	[]
/src/h2o/deps/picotls/lib/certificate_compression.c	[]	[]
/src/h2o/deps/brotli/c/enc/compress_fragment.c	[]	[]
/src/h2o/lib/handler/headers_util.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/brotli/c/enc/brotli_bit_stream.c	[]	[]
/src/h2o/lib/handler/fastcgi.c	[]	[]
/src/h2o/include/h2o/http3_common.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/quicly-tracer.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/libyrmcds/close.c	[]	[]
/src/h2o/deps/quicly/include/quicly/linklist.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/handler/configurator/fastcgi.c	[]	[]
/src/h2o/lib/core/configurator.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/brotli/c/enc/./metablock_inc.h	[]	[]
/src/h2o/include/h2o/http2_internal.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/yaml/src/loader.c	[]	[]
/src/h2o/deps/brotli/c/enc/./backward_references_inc.h	[]	[]
/src/h2o/lib/common/balancer/roundrobin.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/common/token_table.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/handler/status.c	[]	[]
/src/h2o/deps/picotls/lib/picotls.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/handler/configurator/redirect.c	[]	[]
/src/h2o/lib/handler/status/events.c	[]	[]
/src/h2o/lib/common/balancer/least_conn.c	[]	[]
/src/h2o/lib/http3/server.c	['h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/deps/brotli/c/dec/state.c	[]	[]
/src/h2o/lib/common/socket/evloop.c.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/hiredis/read.c	[]	[]
/src/h2o/lib/handler/configurator/h2olog.c	[]	[]
/src/h2o/lib/handler/configurator/server_timing.c	[]	[]
/src/h2o/lib/handler/http2_debug_state.c	[]	[]
/src/h2o/deps/picotls/include/picotls/../picotls.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/handler/configurator/self_trace.c	[]	[]
/src/h2o/deps/libyrmcds/connect.c	[]	[]
/src/h2o/deps/yaml/src/scanner.c	[]	[]
/src/h2o/lib/handler/access_log.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/lib/handler/configurator/file.c	[]	[]
/src/h2o/lib/handler/status/ssl.c	[]	[]
/src/h2o/deps/quicly/include/quicly.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/lib/handler/status/memory.c	[]	[]
/src/h2o/lib/http1.c	['h2o-fuzzer-http1']	['h2o-fuzzer-http1']
/src/h2o/include/h2o/string_.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/quicly/include/quicly/loss.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/common/serverutil.c	['h2o-fuzzer-http3']	[]
/src/h2o/lib/handler/configurator/proxy.c	[]	[]
/src/h2o/deps/quicly/include/quicly/rate.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/usr/include/stdlib.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/deps/quicly/lib/ranges.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/lib/http2/connection.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/common/multithread.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/core/config.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/brotli/c/enc/histogram.c	[]	[]
/src/h2o/deps/brotli/c/enc/utf8_util.c	[]	[]
/src/h2o/include/h2o/socket/evloop.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/handler/configurator/access_log.c	[]	[]
/src/h2o/lib/handler/compress/brotli.c	[]	[]
/src/h2o/lib/handler/status/durations.c	[]	[]
/src/h2o/deps/brotli/c/enc/entropy_encode.c	[]	[]
/src/h2o/deps/quicly/lib/retire_cid.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/http2/stream.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/quicly/include/quicly/sendstate.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/hiredis/alloc.h	[]	[]
/src/h2o/include/h2o/http2_scheduler.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/brotli/c/dec/bit_reader.c	[]	[]
/src/h2o/include/h2o/socket.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/common/socketpool.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/quicly/include/quicly/retire_cid.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/libyrmcds/send.c	[]	[]
/src/h2o/deps/picotls/lib/cifra/x25519.c	[]	[]
/src/h2o/deps/hiredis/dict.c	[]	[]
/src/h2o/lib/common/cache.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/libyrmcds/send_text.c	[]	[]
/src/h2o/lib/common/token.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/picotls/lib/hpke.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/picotls/deps/cifra/src/sha256.c	[]	[]
/src/h2o/lib/core/util.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/handler/expires.c	[]	[]
/src/h2o/deps/brotli/c/enc/./././hash_longest_match_quickly_inc.h	[]	[]
/src/h2o/deps/libyrmcds/recv.c	[]	[]
/src/h2o/deps/picohttpparser/picohttpparser.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/yaml/src/api.c	[]	[]
/src/h2o/lib/common/file.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/deps/brotli/c/enc/static_dict.c	[]	[]
/src/h2o/fuzz/driver.cc	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/handler/configurator/headers.c	[]	[]
/src/h2o/deps/quicly/lib/cc-cubic.c	[]	[]
/src/h2o/deps/picotls/deps/cifra/src/blockwise.c	[]	[]
/src/h2o/deps/brotli/c/enc/./block_encoder_inc.h	[]	[]
/src/h2o/deps/quicly/lib/cc-reno.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/lib/handler/throttle_resp.c	[]	[]
/src/h2o/lib/http2/hpack.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/include/h2o/httpclient.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/handler/file/templates.c.h	[]	[]
/src/h2o/deps/picotls/deps/cifra/src/chash.c	[]	[]
/src/h2o/lib/common/timerwheel.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/quicly/lib/sendstate.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/fuzz/driver_common.cc	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/handler/connect.c	[]	[]
/src/h2o/lib/handler/configurator/errordoc.c	[]	[]
/src/h2o/deps/quicly/include/quicly/pacer.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/handler/configurator/compress.c	[]	[]
/src/h2o/deps/brotli/c/enc/./././hash_to_binary_tree_inc.h	[]	[]
/src/h2o/deps/quicly/lib/cc-pico.c	[]	[]
/src/h2o/deps/brotli/c/enc/metablock.c	[]	[]
/usr/include/x86_64-linux-gnu/bits/socket.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/lib/handler/compress.c	[]	[]
/src/h2o/lib/common/rand.c	['h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/lib/http3/frame.c	[]	[]
/src/h2o/lib/handler/self_trace.c	[]	[]
/usr/include/x86_64-linux-gnu/bits/byteswap.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/usr/include/openssl/x509v3.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/handler/headers.c	[]	[]
/src/h2o/include/h2o/time_.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/handler/configurator/throttle_resp.c	[]	[]
/src/h2o/deps/picotls/include/picotls.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/usr/include/x86_64-linux-gnu/bits/stdlib-bsearch.h	[]	[]
/src/h2o/lib/http2/casper.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/handler/configurator/status.c	[]	[]
/src/h2o/deps/quicly/lib/quicly.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/common/memcached.c	[]	[]
/src/h2o/lib/common/http3client.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/quicly/include/quicly/streambuf.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/deps/quicly/lib/rate.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/common/absprio.c	[]	[]
/src/h2o/deps/picotls/deps/cifra/src/hmac.c	[]	[]
/src/h2o/deps/hiredis/async.c	[]	[]
/src/h2o/deps/picotls/deps/cifra/src/drbg.c	[]	[]
/src/h2o/deps/yaml/src/writer.c	[]	[]
/src/h2o/fuzz/driver_url.cc	['h2o-fuzzer-url']	['h2o-fuzzer-url']
/src/h2o/deps/picotls/lib/pembase64.c	[]	[]
/src/h2o/deps/hiredis/sds.c	[]	[]
/src/h2o/include/h2o/http3_internal.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/deps/quicly/lib/defaults.c	[]	[]
/src/h2o/deps/hiredis/alloc.c	[]	[]
/usr/include/openssl/x509.h	[]	[]
/src/h2o/include/h2o/configurator.h	[]	[]
/src/h2o/lib/handler/configurator/headers_util.c	[]	[]
/src/h2o/deps/yaml/src/reader.c	[]	[]
/src/h2o/lib/handler/configurator/expires.c	[]	[]
/src/h2o/lib/http2/scheduler.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/core/logconf.c	['h2o-fuzzer-http3']	[]
/src/h2o/deps/yaml/src/emitter.c	[]	[]
/src/h2o/deps/brotli/c/enc/backward_references.c	[]	[]
/src/h2o/deps/brotli/c/enc/encode.c	[]	[]
/src/h2o/deps/libgkc/gkc.c	[]	[]
/src/h2o/lib/common/../../deps/ssl-conservatory/openssl/openssl_hostname_validation.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/common/string.c	['h2o-fuzzer-url', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-url', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/common/redis.c	[]	[]
/src/h2o/lib/handler/errordoc.c	[]	[]
/src/h2o/lib/common/memory.c	['h2o-fuzzer-url', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-url', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/quicly/lib/local_cid.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	[]
/src/h2o/lib/common/time.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/lib/core/proxy.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/brotli/c/enc/memory.c	[]	[]
/src/h2o/lib/common/socket/evloop/epoll.c.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/http2/cache_digests.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/brotli/c/enc/compress_fragment_two_pass.c	[]	[]
/src/h2o/lib/handler/mimemap.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/common/url.c	['h2o-fuzzer-url', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-url', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/deps/brotli/c/enc/./././hash_longest_match64_inc.h	[]	[]
/src/h2o/include/h2o/multithread.h	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	[]
/src/h2o/lib/core/headers.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']	['h2o-fuzzer-http2', 'h2o-fuzzer-http1']
/src/h2o/deps/libyrmcds/socket.c	[]	[]
/src/h2o/deps/quicly/lib/recvstate.c	['h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-http3']
/src/h2o/include/h2o/memory.h	['h2o-fuzzer-url', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']	['h2o-fuzzer-url', 'h2o-fuzzer-http2', 'h2o-fuzzer-http1', 'h2o-fuzzer-http3']
/src/h2o/lib/handler/reproxy.c	[]	[]
/src/h2o/lib/handler/server_timing.c	[]	[]
/src/h2o/deps/picotls/deps/cifra/src/ext/handy.h	[]	[]

Directories in report

Directory
/src/h2o/deps/hiredis/
/src/h2o/lib/handler/file/
/src/h2o/lib/http2/
/src/h2o/include/h2o/socket/
/src/h2o/lib/handler/configurator/
/src/h2o/lib/handler/
/src/h2o/lib/common/socket/
/usr/include/
/src/h2o/deps/picotls/include/picotls/../
/src/h2o/deps/brotli/c/enc/
/usr/include/x86_64-linux-gnu/sys/
/usr/include/openssl/
/src/h2o/deps/quicly/include/quicly/
/src/h2o/deps/libgkc/
/src/h2o/deps/picotls/include/
/src/h2o/deps/picotls/deps/cifra/src/ext/
/src/h2o/lib/
/src/h2o/lib/http3/
/src/h2o/deps/brotli/c/enc/./././
/src/h2o/deps/quicly/include/
/src/h2o/deps/yoml/
/src/h2o/deps/cloexec/
/src/h2o/lib/core/
/src/h2o/deps/picotls/lib/
/src/h2o/deps/brotli/c/enc/./
/src/h2o/lib/http3/./../
/src/h2o/include/
/src/h2o/deps/quicly/lib/
/src/h2o/deps/yaml/src/
/usr/include/x86_64-linux-gnu/bits/
/src/h2o/deps/picotls/lib/cifra/
/src/h2o/deps/picohttpparser/
/src/h2o/
/src/h2o/lib/handler/compress/
/src/h2o/deps/libyrmcds/
/src/h2o/fuzz/
/src/h2o/deps/brotli/c/enc/././
/src/h2o/lib/common/balancer/
/src/h2o/lib/common/../../deps/ssl-conservatory/openssl/
/src/h2o/deps/klib/
/src/h2o/lib/common/
/src/h2o/lib/handler/status/
/src/h2o/lib/common/socket/evloop/
/src/h2o/deps/brotli/c/dec/
/src/h2o/deps/brotli/c/common/
/src/h2o/deps/picotls/deps/cifra/src/
/src/h2o/include/h2o/
/src/h2o/deps/golombset/
/src/h2o/deps/brotli/c/dec/./