High level conclusions

Fuzzers reach 71.06% code coverage.

Fuzzers reach 69.00% of cyclomatic complexity.

Fuzzers reach 56.96% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

376 / 660

Cyclomatic complexity statically reachable by fuzzers

3598 / 5214

Runtime code coverage of functions

469 / 660

Warning: The number of runtime covered functions are larger than the number of reachable functions. This means that Fuzz Introspector found there are more functions covered at runtime than what is considered reachable based on the static analysis. This is a limitation in the analysis as anything covered at runtime is by definition reachable by the fuzzers.
This is likely due to a limitation in the static analysis. In this case, the count of functions covered at runtime is the true value, which means this is what should be considered "achieved" by the fuzzer.

Use the project functions table below to query all functions that were not covered at runtime.

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: url_parser_fuzzer

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	1	3.57%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	27	96.4%
All colors	28	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
1	8	httplib::detail::split(char const*, char const*, char, unsigned long, std::__1::function )	call site: 00008

Runtime coverage analysis

Covered functions

27

Functions that are reachable but not covered

4

Reachable functions

39

Percentage of reachable functions covered

89.74%

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
/src/cpp-httplib/test/fuzzing/url_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	18

Fuzzer: header_parser_fuzzer

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	1	3.03%
gold	[1:9]	5	15.1%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	27	81.8%
All colors	33	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
1	23	httplib::detail::parse_disposition_params(std::__1::basic_string , std::__1::allocator > const&, httplib::detail::insertion_ordered_multimap , std::__1::allocator >, std::__1::equal_to , std::__1::allocator > > >&)	call site: 00023

Runtime coverage analysis

Covered functions

40

Functions that are reachable but not covered

5

Reachable functions

40

Percentage of reachable functions covered

87.5%

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
/src/cpp-httplib/test/fuzzing/header_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	18

Fuzzer: multipart_parser_fuzzer

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	43	37.0%
gold	[1:9]	2	1.72%
yellow	[10:29]	1	0.86%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	70	60.3%
All colors	116	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
20	74	httplib::detail::insertion_ordered_multimap , std::__1::allocator >, std::__1::equal_to , std::__1::allocator > > >::make_iter(unsigned long, unsigned long)	call site: 00074
15	58	httplib::detail::FormDataParser::parse_content_disposition(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator >&) const	call site: 00058
5	51	httplib::detail::FormDataParser::start_with_case_ignore(std::__1::basic_string , std::__1::allocator > const&, char const*, unsigned long) const	call site: 00051
2	113	LLVMFuzzerTestOneInput	call site: 00113
1	2	httplib::detail::FormDataParser::FormDataParser()	call site: 00002

Runtime coverage analysis

Covered functions

40

Functions that are reachable but not covered

42

Reachable functions

126

Percentage of reachable functions covered

66.67%

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
/src/cpp-httplib/test/fuzzing/multipart_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	62

Fuzzer: client_fuzzer

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	132	31.8%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	4	0.96%
lawngreen	50+	279	67.2%
All colors	415	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
21	149	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00149	inet_pton
11	226	httplib::ClientImpl::write_request_body(httplib::Stream&, httplib::Request&, httplib::Error&)	call site: 00226	_ZN7httplib6detail11make_uniqueINS0_15gzip_compressorEJEEENSt3__19enable_ifIXntsr3std8is_arrayIT_EE5valueENS3_10unique_ptrIS5_NS3_14default_deleteIS5_EEEEE4typeEDpOT0_
10	26	FuzzableClient::ProcessFuzzedResponse(FuzzedStream&, std::__1::basic_string , std::__1::allocator > const&)	call site: 00026
10	195	httplib::detail::insertion_ordered_multimap , std::__1::allocator >, std::__1::equal_to , std::__1::allocator > > >::end() const	call site: 00195	snprintf
9	139	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00139
6	132	httplib::detail::add_default_user_agent_header(httplib::Request&)	call site: 00132
6	245	bool httplib::detail::write_content_with_progress (httplib::Stream&, std::__1::function const&, unsigned long, unsigned long, httplib::ClientImpl::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Error&) const::{lambda()#1}, std::__1 const&, httplib::Error&)	call site: 00245
6	301	httplib::ClientImpl::process_request(httplib::Stream&, httplib::Request&, httplib::Response&, bool, httplib::Error&)	call site: 00301
4	17	httplib::ClientImpl::close_socket(httplib::ClientImpl::Socket&)	call site: 00017	close
4	88	httplib::detail::has_header_token(httplib::detail::insertion_ordered_multimap , std::__1::allocator >, httplib::detail::case_ignore::equal_to> const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)	call site: 00088
4	112	httplib::ClientImpl::prepare_default_headers(httplib::Request&, bool, std::__1::basic_string , std::__1::allocator > const&)	call site: 00112
4	174	httplib::detail::encode_request_target(std::__1::basic_string , std::__1::allocator > const&, bool)	call site: 00174	snprintf

Runtime coverage analysis

Covered functions

159

Functions that are reachable but not covered

108

Reachable functions

399

Percentage of reachable functions covered

72.93%

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
/src/cpp-httplib/test/fuzzing/client_fuzzer.cc	6
/src/cpp-httplib/test/fuzzing/../../httplib.h	194

Fuzzer: server_fuzzer

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	208	31.6%
gold	[1:9]	21	3.19%
yellow	[10:29]	7	1.06%
greenyellow	[30:49]	13	1.97%
lawngreen	50+	409	62.1%
All colors	658	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
53	423	httplib::detail::insertion_ordered_multimap , std::__1::allocator >, httplib::detail::case_ignore::equal_to>::begin() const	call site: 00423	__cxa_thread_atexit
29	376	httplib::detail::is_websocket_upgrade(httplib::Request const&)	call site: 00376	__cxa_guard_acquire
14	270	bool httplib::detail::process_multipart_ranges_data , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)::{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, httplib::Server::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)::{lambda()#1} const&)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#1}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#2}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(unsigned long, unsigned long)#1}>(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, httplib::Server::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)::{lambda()#1}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#2}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(unsigned long, unsigned long)#1})	call site: 00270	_ZN7httplib6detail11make_uniqueINS0_12nocompressorEJEEENSt3__19enable_ifIXntsr3std8is_arrayIT_EE5valueENS3_10unique_ptrIS5_NS3_14default_deleteIS5_EEEEE4typeEDpOT0_
14	407	httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)	call site: 00407	__assert_fail
12	627	httplib::Server::process_request(httplib::Stream&, std::__1::basic_string , std::__1::allocator > const&, int, std::__1::basic_string , std::__1::allocator > const&, int, bool, bool&, std::__1::function const&, bool*)	call site: 00627	__cxa_end_catch
11	241	httplib::Server::write_response_core(httplib::Stream&, bool, httplib::Request const&, httplib::Response&, bool)	call site: 00241
10	13	httplib::Server::process_request(httplib::Stream&, std::__1::basic_string , std::__1::allocator > const&, int, std::__1::basic_string , std::__1::allocator > const&, int, bool, bool&, std::__1::function const&, bool*)	call site: 00013
8	55	httplib::detail::gzip_compressor::gzip_compressor()	call site: 00055
7	525	httplib::detail::is_connection_persistent(httplib::Request const&)	call site: 00525	poll
5	113	httplib::detail::is_prohibited_header_name(std::__1::basic_string , std::__1::allocator > const&)	call site: 00113	__cxa_allocate_exception
5	174	bool httplib::detail::process_multipart_ranges_data , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#1}, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#2}, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(unsigned long, unsigned long)#1}>(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#1}, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#2}, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(unsigned long, unsigned long)#1})	call site: 00174
5	621	httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)	call site: 00621	__cxa_begin_catch

Runtime coverage analysis

Covered functions

294

Functions that are reachable but not covered

185

Reachable functions

582

Percentage of reachable functions covered

68.21%

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
/src/cpp-httplib/test/fuzzing/server_fuzzer.cc	4
/src/cpp-httplib/test/fuzzing/../../httplib.h	273
/usr/local/bin/../include/c++/v1/stdexcept	1

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
LLVMFuzzerInitialize	/src/cpp-httplib/test/fuzzing/server_fuzzer.cc	2	['N/A', 'N/A']	7	0	199	34	23	35	0	143	133
httplib::Server::process_and_close_socket(int)	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'int']	23	0	92	10	8	621	0	2805	122
httplib::ClientImpl::create_and_connect_socket(httplib::ClientImpl::Socket&,httplib::Error&)	/src/cpp-httplib/test/fuzzing/../../httplib.h	3	['N/A', 'N/A', 'N/A']	9	0	42	6	3	78	0	182	111
httplib::ws::WebSocket::start_heartbeat()::{lambda()#1}::operator()()const	/src/cpp-httplib/test/fuzzing/../../httplib.h	1	['N/A']	2	0	155	34	29	8	0	104	104
httplib::detail::write_content_chunked ,std::__1::allocator >const&,std::__1::basic_string ,std::__1::allocator >const&)::{lambda()#1},httplib::detail::compressor>(httplib::Stream&,std::__1::function const&,httplib::Server::write_content_with_provider(httplib::Stream&,httplib::Requestconst&,httplib::Response&,std::__1::basic_string ,std::__1::allocator >const&,std::__1::basic_string ,std::__1::allocator >const&)::{lambda()#1}const&,httplib::detail::compressor&,httplib::Error&)::{lambda(httplib::detail::insertion_ordered_multimap ,std::__1::allocator >,httplib::detail::case_ignore::equal_to>const&)#1}::operator()(httplib::detail::insertion_ordered_multimap ,std::__1::allocator >,httplib::detail::case_ignore::equal_to>const)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'N/A']	7	0	20	3	2	58	0	157	64
httplib::detail::write_content_chunked (httplib::Stream&,std::__1::function const&,httplib::ClientImpl::write_content_with_provider(httplib::Stream&,httplib::Requestconst&,httplib::Error&)const::{lambda()#1}const&,httplib::detail::compressor&,httplib::Error&)::{lambda(httplib::detail::insertion_ordered_multimap ,httplib::detail::compressor::allocator >,httplib::detail::case_ignore::equal_to>const&)#1}::operator()(httplib::detail::insertion_ordered_multimap ,httplib::detail::compressor::allocator >,httplib::detail::case_ignore::equal_to>const)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'N/A']	7	0	20	3	2	58	0	157	62
httplib::Server::Server()::{lambda()#1}::operator()()const	/src/cpp-httplib/test/fuzzing/../../httplib.h	1	['N/A']	3	0	84	14	14	17	0	74	58
httplib::detail::parse_accept_header(std::__1::basic_string ,std::__1::allocator >const&,std::__1::vector ,std::__1::allocator >,std::__1::allocator ,std::__1::allocator >>>&)::{lambda(charconst*,charconst*)#1}::operator()(charconst*,charconst*)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	3	['N/A', 'N/A', 'N/A']	4	0	150	25	24	22	0	100	42
httplib::ThreadPool::enqueue(std::__1::function )::{lambda()#1}::operator()()const	/src/cpp-httplib/test/fuzzing/../../httplib.h	1	['N/A']	2	0	17	3	2	5	0	39	37
httplib::detail::parse_disposition_params(std::__1::basic_string ,std::__1::allocator >const&,httplib::detail::insertion_ordered_multimap ,std::__1::allocator >,std::__1::equal_to ,std::__1::allocator >>>&)::{lambda(charconst*,charconst*)#1}::operator()(charconst*,charconst*)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	3	['N/A', 'N/A', 'N/A']	3	0	160	28	22	14	0	43	35

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

Functions statically reachable by fuzzers

458 / 660

Cyclomatic complexity statically reachable by fuzzers

4328 / 5214

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.

/src/cpp-httplib/test/fuzzing/url_parser_fuzzer.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=['httplib::detail::split(char const*, char const*, char, unsigned long, std::__1::function)']

/src/cpp-httplib/test/fuzzing/header_parser_fuzzer.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=['httplib::detail::parse_disposition_params(std::__1::basic_string, std::__1::allocator > const&, httplib::detail::insertion_ordered_multimap, std::__1::allocator >, std::__1::equal_to, std::__1::allocator > > >&)']

/src/cpp-httplib/test/fuzzing/multipart_parser_fuzzer.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=['httplib::detail::insertion_ordered_multimap, std::__1::allocator >, std::__1::equal_to, std::__1::allocator > > >::make_iter(unsigned long, unsigned long)', 'httplib::detail::FormDataParser::parse_content_disposition(std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator >&) const', 'httplib::detail::FormDataParser::start_with_case_ignore(std::__1::basic_string, std::__1::allocator > const&, char const*, unsigned long) const', 'LLVMFuzzerTestOneInput', 'httplib::detail::FormDataParser::FormDataParser()']

/src/cpp-httplib/test/fuzzing/client_fuzzer.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=['httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)', 'httplib::ClientImpl::write_request_body(httplib::Stream&, httplib::Request&, httplib::Error&)', 'FuzzableClient::ProcessFuzzedResponse(FuzzedStream&, std::__1::basic_string, std::__1::allocator > const&)', 'httplib::detail::insertion_ordered_multimap, std::__1::allocator >, std::__1::equal_to, std::__1::allocator > > >::end() const', 'httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)', 'httplib::detail::add_default_user_agent_header(httplib::Request&)', 'bool httplib::detail::write_content_with_progress(httplib::Stream&, std::__1::function const&, unsigned long, unsigned long, httplib::ClientImpl::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Error&) const::{lambda()#1}, std::__1 const&, httplib::Error&)', 'httplib::ClientImpl::process_request(httplib::Stream&, httplib::Request&, httplib::Response&, bool, httplib::Error&)', 'httplib::ClientImpl::close_socket(httplib::ClientImpl::Socket&)', 'httplib::detail::has_header_token(httplib::detail::insertion_ordered_multimap, std::__1::allocator >, httplib::detail::case_ignore::equal_to> const&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&)']

/src/cpp-httplib/test/fuzzing/server_fuzzer.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=['httplib::detail::insertion_ordered_multimap, std::__1::allocator >, httplib::detail::case_ignore::equal_to>::begin() const', 'httplib::detail::is_websocket_upgrade(httplib::Request const&)', 'bool httplib::detail::process_multipart_ranges_data, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&)::{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, httplib::Server::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&)::{lambda()#1} const&)::{lambda(std::__1::basic_string, std::__1::allocator > const&)#1}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(std::__1::basic_string, std::__1::allocator > const&)#2}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(unsigned long, unsigned long)#1}>(httplib::Request const&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, httplib::Server::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&)::{lambda()#1}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(std::__1::basic_string, std::__1::allocator > const&)#2}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(unsigned long, unsigned long)#1})', 'httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)', 'httplib::Server::process_request(httplib::Stream&, std::__1::basic_string, std::__1::allocator > const&, int, std::__1::basic_string, std::__1::allocator > const&, int, bool, bool&, std::__1::function const&, bool*)', 'httplib::Server::write_response_core(httplib::Stream&, bool, httplib::Request const&, httplib::Response&, bool)', 'httplib::Server::process_request(httplib::Stream&, std::__1::basic_string, std::__1::allocator > const&, int, std::__1::basic_string, std::__1::allocator > const&, int, bool, bool&, std::__1::function const&, bool*)', 'httplib::detail::gzip_compressor::gzip_compressor()', 'httplib::detail::is_connection_persistent(httplib::Request const&)', 'httplib::detail::is_prohibited_header_name(std::__1::basic_string, std::__1::allocator > const&)']

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
httplib::ClientImpl::write_request(httplib::Stream&,httplib::Request&,bool,httplib::Error&,bool)	84	36	42.85%	['client_fuzzer']
httplib::detail::stream_line_reader::getline()	55	29	52.72%	['server_fuzzer', 'client_fuzzer']
httplib::ClientImpl::write_request_body(httplib::Stream&,httplib::Request&,httplib::Error&)	31	4	12.90%	['client_fuzzer']
httplib::detail::BodyReader::read(char*,unsignedlong)	60	23	38.33%	['server_fuzzer', 'client_fuzzer']
httplib::Server::process_request(httplib::Stream&,std::__1::basic_string ,std::__1::allocator >const&,int,std::__1::basic_string ,std::__1::allocator >const&,int,bool,bool&,std::__1::function const&,bool*)	230	124	53.91%	['server_fuzzer']
httplib::status_message(int)	74	13	17.56%	['server_fuzzer']
httplib::Server::handle_file_request(httplib::Request&,httplib::Response&)	69	4	5.797%	['server_fuzzer']

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/cpp-httplib/test/fuzzing/header_parser_fuzzer.cc	['header_parser_fuzzer']	['header_parser_fuzzer']
/usr/local/bin/../include/c++/v1/string	[]	[]
/usr/local/bin/../include/c++/v1/stdexcept	['server_fuzzer']	[]
/usr/local/bin/../include/c++/v1/__exception/exception.h	[]	[]
/src/cpp-httplib/test/fuzzing/client_fuzzer.cc	['client_fuzzer']	['client_fuzzer']
/src/cpp-httplib/test/fuzzing/../../httplib.h	['url_parser_fuzzer', 'header_parser_fuzzer', 'multipart_parser_fuzzer', 'client_fuzzer', 'server_fuzzer']	[]
/src/cpp-httplib/test/fuzzing/url_parser_fuzzer.cc	['url_parser_fuzzer']	['url_parser_fuzzer']
/src/cpp-httplib/test/fuzzing/server_fuzzer.cc	['server_fuzzer']	['server_fuzzer']
/src/cpp-httplib/test/fuzzing/multipart_parser_fuzzer.cc	['multipart_parser_fuzzer']	['multipart_parser_fuzzer']

Directories in report

Directory
/src/cpp-httplib/test/fuzzing/
/usr/local/bin/../include/c++/v1/__exception/
/usr/local/bin/../include/c++/v1/
/src/cpp-httplib/test/fuzzing/../../