High level conclusions

Fuzzers reach 67.35% code coverage.

Fuzzers reach 67.96% of cyclomatic complexity.

Fuzzers reach 52.90% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

282 / 533

Cyclomatic complexity statically reachable by fuzzers

3166 / 4658

Runtime code coverage of functions

359 / 533

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: 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	0	0.0%
gold	[1:9]	5	17.8%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	1	3.57%
lawngreen	50+	22	78.5%
All colors	28	100

Runtime coverage analysis

Covered functions

33

Functions that are reachable but not covered

3

Reachable functions

32

Percentage of reachable functions covered

90.62%

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
/src/cpp-httplib/test/fuzzing/header_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	14

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	0	0.0%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	26	100.%
All colors	26	100

Runtime coverage analysis

Covered functions

22

Functions that are reachable but not covered

2

Reachable functions

35

Percentage of reachable functions covered

94.29%

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	16

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	19	22.3%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	66	77.6%
All colors	85	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
13	50	httplib::detail::FormDataParser::parse_content_disposition(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator >&) const	call site: 00050
5	43	httplib::detail::FormDataParser::start_with_case_ignore(std::__1::basic_string , std::__1::allocator > const&, char const*, unsigned long) const	call site: 00043
1	83	LLVMFuzzerTestOneInput	call site: 00083

Runtime coverage analysis

Covered functions

39

Functions that are reachable but not covered

25

Reachable functions

90

Percentage of reachable functions covered

72.22%

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	44

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	101	36.2%
gold	[1:9]	1	0.35%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	177	63.4%
All colors	279	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
19	82	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00082	inet_pton
11	136	httplib::ClientImpl::write_request_body(httplib::Stream&, httplib::Request&, httplib::Error&)	call site: 00136	_ZN7httplib6detail11make_uniqueINS0_15gzip_compressorEJEEENSt3__19enable_ifIXntsr3std8is_arrayIT_EE5valueENS3_10unique_ptrIS5_NS3_14default_deleteIS5_EEEEE4typeEDpOT0_
7	117	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00117	__cxa_thread_atexit
6	155	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: 00155
5	52	httplib::detail::get_header_value(std::__1::unordered_multimap , std::__1::allocator >, std::__1::basic_string , std::__1::allocator >, httplib::detail::case_ignore::hash, httplib::detail::case_ignore::equal_to, std::__1::allocator , std::__1::allocator > const, std::__1::basic_string , std::__1::allocator > > > > const&, std::__1::basic_string , std::__1::allocator > const&, char const*, unsigned long)	call site: 00052	__cxa_allocate_exception
5	76	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00076
5	109	httplib::detail::split(char const*, char const*, char, std::__1::function )	call site: 00109
5	194	httplib::ClientImpl::process_request(httplib::Stream&, httplib::Request&, httplib::Response&, bool, httplib::Error&)	call site: 00194
4	15	httplib::ClientImpl::close_socket(httplib::ClientImpl::Socket&)	call site: 00015	close
4	71	httplib::ClientImpl::prepare_default_headers(httplib::Request&, bool, std::__1::basic_string , std::__1::allocator > const&)	call site: 00071
4	104	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00104	snprintf
3	148	httplib::DataSink::DataSink()	call site: 00148

Runtime coverage analysis

Covered functions

115

Functions that are reachable but not covered

83

Reachable functions

281

Percentage of reachable functions covered

70.46%

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	131
/usr/local/bin/../include/c++/v1/stdexcept	1

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	166	32.8%
gold	[1:9]	23	4.55%
yellow	[10:29]	1	0.19%
greenyellow	[30:49]	14	2.77%
lawngreen	50+	301	59.6%
All colors	505	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
31	287	httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)	call site: 00287	__assert_fail
25	320	httplib::detail::split_find(char const*, char const*, char, unsigned long, std::__1::function )	call site: 00320	timegm
24	261	httplib::detail::is_websocket_upgrade(httplib::Request const&)	call site: 00261	__cxa_guard_acquire
14	185	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: 00185	_ZN7httplib6detail11make_uniqueINS0_12nocompressorEJEEENSt3__19enable_ifIXntsr3std8is_arrayIT_EE5valueENS3_10unique_ptrIS5_NS3_14default_deleteIS5_EEEEE4typeEDpOT0_
13	154	httplib::Server::write_response_core(httplib::Stream&, bool, httplib::Request const&, httplib::Response&, bool)	call site: 00154
12	476	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: 00476	__cxa_end_catch
7	386	httplib::detail::is_connection_persistent(httplib::Request const&)	call site: 00386	poll
5	58	httplib::detail::is_prohibited_header_name(std::__1::basic_string , std::__1::allocator > const&)	call site: 00058	__cxa_allocate_exception
5	97	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: 00097
4	76	httplib::detail::get_range_offset_and_length(std::__1::pair , unsigned long)	call site: 00076
4	471	httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)	call site: 00471	__cxa_begin_catch
3	235	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: 00235

Runtime coverage analysis

Covered functions

222

Functions that are reachable but not covered

168

Reachable functions

459

Percentage of reachable functions covered

63.4%

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	211
/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	142	132
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	74	0	178	116
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	97	97
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(std::__1::unordered_multimap ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,httplib::detail::case_ignore::hash,std::__1::unordered_multimap::equal_to,std::__1::allocator ,std::__1::allocator >const,std::__1::basic_string ,std::__1::allocator >>>>const&)#1}::operator()(std::__1::unordered_multimap ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,httplib::detail::case_ignore::hash,std::__1::unordered_multimap::equal_to,std::__1::allocator ,std::__1::allocator >const,std::__1::basic_string ,std::__1::allocator >>>>const)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'N/A']	6	0	20	3	2	32	0	129	68
httplib::Server::process_and_close_socket(int)	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'int']	21	0	106	10	8	483	0	2383	68
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::compressor::unordered_multimap ,httplib::detail::compressor::allocator >,httplib::detail::compressor::allocator ,httplib::detail::case_ignore::hash,httplib::detail::compressor::basic_string ,httplib::detail::compressor::allocator >::equal_to,httplib::detail::compressor::char_traits const,httplib::detail::compressor::allocator >>>const&)#1}::operator()(httplib::detail::compressor::unordered_multimap ,httplib::detail::compressor::allocator >,httplib::detail::compressor::allocator ,httplib::detail::case_ignore::hash,httplib::detail::compressor::basic_string ,httplib::detail::compressor::allocator >::equal_to,httplib::detail::compressor::char_traits const,httplib::detail::compressor::allocator >>>const)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'N/A']	6	0	20	3	2	32	0	129	66
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']	5	0	161	28	28	22	0	102	46
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

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

Functions statically reachable by fuzzers

351 / 533

Cyclomatic complexity statically reachable by fuzzers

3818 / 4658

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/header_parser_fuzzer.cc

Dictionary

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

/src/cpp-httplib/test/fuzzing/url_parser_fuzzer.cc

Dictionary

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

/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::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']

/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&)', 'httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)', '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::detail::get_header_value(std::__1::unordered_multimap, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, httplib::detail::case_ignore::hash, httplib::detail::case_ignore::equal_to, std::__1::allocator, std::__1::allocator > const, std::__1::basic_string, std::__1::allocator > > > > const&, std::__1::basic_string, std::__1::allocator > const&, char const*, unsigned long)', 'httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)', 'httplib::detail::split(char const*, char const*, char, std::__1::function)', 'httplib::ClientImpl::process_request(httplib::Stream&, httplib::Request&, httplib::Response&, bool, httplib::Error&)', 'httplib::ClientImpl::close_socket(httplib::ClientImpl::Socket&)', 'httplib::ClientImpl::prepare_default_headers(httplib::Request&, bool, 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::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)', 'httplib::detail::split_find(char const*, char const*, char, unsigned long, std::__1::function)', '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::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::is_connection_persistent(httplib::Request const&)', 'httplib::detail::is_prohibited_header_name(std::__1::basic_string, std::__1::allocator > const&)', '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})', 'httplib::detail::get_range_offset_and_length(std::__1::pair, unsigned long)']

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)	94	42	44.68%	['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*)	224	121	54.01%	['server_fuzzer']
httplib::status_message(int)	74	13	17.56%	['server_fuzzer']
httplib::Server::handle_file_request(httplib::Request&,httplib::Response&)	59	4	6.779%	['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']
/src/cpp-httplib/test/fuzzing/server_fuzzer.cc	['server_fuzzer']	['server_fuzzer']
/usr/local/bin/../include/c++/v1/string	[]	[]
/src/cpp-httplib/test/fuzzing/client_fuzzer.cc	['client_fuzzer']	['client_fuzzer']
/usr/local/bin/../include/c++/v1/__exception/exception.h	[]	[]
/usr/local/bin/../include/c++/v1/stdexcept	['client_fuzzer', 'server_fuzzer']	[]
/usr/local/bin/../include/c++/v1/istream	[]	[]
/src/cpp-httplib/test/fuzzing/../../httplib.h	['header_parser_fuzzer', 'url_parser_fuzzer', 'multipart_parser_fuzzer', 'client_fuzzer', 'server_fuzzer']	[]
/src/cpp-httplib/test/fuzzing/multipart_parser_fuzzer.cc	['multipart_parser_fuzzer']	['multipart_parser_fuzzer']
/src/cpp-httplib/test/fuzzing/url_parser_fuzzer.cc	['url_parser_fuzzer']	['url_parser_fuzzer']

Directories in report

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