High level conclusions

Fuzzer xml_lpm_fuzzer is blocked:

The runtime code coverage of xml_lpm_fuzzer covers 28.95% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzers reach 23.78% of cyclomatic complexity.

Fuzzers reach 29.69% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

454 / 1529

Cyclomatic complexity statically reachable by fuzzers

1649 / 6932

Runtime code coverage of functions

522 / 1529

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: xml_parsebuffer_fuzzer_UTF-16BE

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	44	16.3%
gold	[1:9]	1	0.37%
yellow	[10:29]	1	0.37%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	223	82.8%
All colors	269	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	125	XML_ParseBuffer	call site: 00125	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
3	44	dtdCreate	call site: 00044	expat_free
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	25	expat_malloc	call site: 00025	expat_free
2	33	parserCreate	call site: 00033	expat_free
2	156	expat_realloc	call site: 00156	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	150	expat_realloc	call site: 00150	expat_free

Runtime coverage analysis

Covered functions

283

Functions that are reachable but not covered

17

Reachable functions

91

Percentage of reachable functions covered

81.32%

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/expat/expat/fuzz/xml_parsebuffer_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	62
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parse_fuzzer_UTF-16

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	39	14.4%
gold	[1:9]	5	1.85%
yellow	[10:29]	2	0.74%
greenyellow	[30:49]	1	0.37%
lawngreen	50+	223	82.5%
All colors	270	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	123	XML_Parse	call site: 00123	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	154	expat_realloc	call site: 00154	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	25	expat_malloc	call site: 00025	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	148	expat_realloc	call site: 00148	expat_free
1	191	XML_Parse	call site: 00191	startParsing
1	197	ParseOneInput	call site: 00197	XML_ParserReset

Runtime coverage analysis

Covered functions

284

Functions that are reachable but not covered

17

Reachable functions

92

Percentage of reachable functions covered

81.52%

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/expat/expat/fuzz/xml_parse_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	63
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parse_fuzzer_US-ASCII

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	45	16.6%
gold	[1:9]	1	0.37%
yellow	[10:29]	2	0.74%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	222	82.2%
All colors	270	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	123	XML_Parse	call site: 00123	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
3	44	dtdCreate	call site: 00044	expat_free
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	25	expat_malloc	call site: 00025	expat_free
2	33	parserCreate	call site: 00033	expat_free
2	154	expat_realloc	call site: 00154	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	148	expat_realloc	call site: 00148	expat_free

Runtime coverage analysis

Covered functions

284

Functions that are reachable but not covered

17

Reachable functions

92

Percentage of reachable functions covered

81.52%

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/expat/expat/fuzz/xml_parse_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	63
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parsebuffer_fuzzer_US-ASCII

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	44	16.3%
gold	[1:9]	1	0.37%
yellow	[10:29]	1	0.37%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	223	82.8%
All colors	269	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	125	XML_ParseBuffer	call site: 00125	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
3	44	dtdCreate	call site: 00044	expat_free
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	25	expat_malloc	call site: 00025	expat_free
2	33	parserCreate	call site: 00033	expat_free
2	156	expat_realloc	call site: 00156	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	150	expat_realloc	call site: 00150	expat_free

Runtime coverage analysis

Covered functions

283

Functions that are reachable but not covered

17

Reachable functions

91

Percentage of reachable functions covered

81.32%

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/expat/expat/fuzz/xml_parsebuffer_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	62
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parse_fuzzer_UTF-16BE

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	39	14.4%
gold	[1:9]	7	2.59%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	1	0.37%
lawngreen	50+	223	82.5%
All colors	270	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	123	XML_Parse	call site: 00123	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	154	expat_realloc	call site: 00154	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	25	expat_malloc	call site: 00025	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	148	expat_realloc	call site: 00148	expat_free
1	191	XML_Parse	call site: 00191	startParsing
1	197	ParseOneInput	call site: 00197	XML_ParserReset

Runtime coverage analysis

Covered functions

284

Functions that are reachable but not covered

17

Reachable functions

92

Percentage of reachable functions covered

81.52%

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/expat/expat/fuzz/xml_parse_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	63
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parse_fuzzer_UTF-8

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	45	16.6%
gold	[1:9]	1	0.37%
yellow	[10:29]	1	0.37%
greenyellow	[30:49]	1	0.37%
lawngreen	50+	222	82.2%
All colors	270	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	123	XML_Parse	call site: 00123	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
3	44	dtdCreate	call site: 00044	expat_free
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	25	expat_malloc	call site: 00025	expat_free
2	33	parserCreate	call site: 00033	expat_free
2	154	expat_realloc	call site: 00154	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	148	expat_realloc	call site: 00148	expat_free

Runtime coverage analysis

Covered functions

284

Functions that are reachable but not covered

17

Reachable functions

92

Percentage of reachable functions covered

81.52%

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/expat/expat/fuzz/xml_parse_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	63
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parsebuffer_fuzzer_UTF-16LE

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	44	16.3%
gold	[1:9]	1	0.37%
yellow	[10:29]	1	0.37%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	223	82.8%
All colors	269	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	125	XML_ParseBuffer	call site: 00125	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
3	44	dtdCreate	call site: 00044	expat_free
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	25	expat_malloc	call site: 00025	expat_free
2	33	parserCreate	call site: 00033	expat_free
2	156	expat_realloc	call site: 00156	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	150	expat_realloc	call site: 00150	expat_free

Runtime coverage analysis

Covered functions

283

Functions that are reachable but not covered

17

Reachable functions

91

Percentage of reachable functions covered

81.32%

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/expat/expat/fuzz/xml_parsebuffer_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	62
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parsebuffer_fuzzer_ISO-8859-1

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	38	14.1%
gold	[1:9]	5	1.85%
yellow	[10:29]	2	0.74%
greenyellow	[30:49]	1	0.37%
lawngreen	50+	223	82.8%
All colors	269	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	125	XML_ParseBuffer	call site: 00125	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	156	expat_realloc	call site: 00156	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	25	expat_malloc	call site: 00025	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	150	expat_realloc	call site: 00150	expat_free
1	196	ParseOneInput	call site: 00196	XML_ParserReset
1	219	LLVMFuzzerTestOneInput	call site: 00219	XML_ParserCreate_MM

Runtime coverage analysis

Covered functions

283

Functions that are reachable but not covered

17

Reachable functions

91

Percentage of reachable functions covered

81.32%

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/expat/expat/fuzz/xml_parsebuffer_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	62
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parse_fuzzer_UTF-16LE

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	44	16.2%
gold	[1:9]	1	0.37%
yellow	[10:29]	3	1.11%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	222	82.2%
All colors	270	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	123	XML_Parse	call site: 00123	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
3	44	dtdCreate	call site: 00044	expat_free
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	33	parserCreate	call site: 00033	expat_free
2	154	expat_realloc	call site: 00154	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	25	expat_malloc	call site: 00025	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	148	expat_realloc	call site: 00148	expat_free

Runtime coverage analysis

Covered functions

284

Functions that are reachable but not covered

17

Reachable functions

92

Percentage of reachable functions covered

81.52%

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/expat/expat/fuzz/xml_parse_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	63
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parsebuffer_fuzzer_UTF-8

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	44	16.3%
gold	[1:9]	2	0.74%
yellow	[10:29]	1	0.37%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	222	82.5%
All colors	269	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	125	XML_ParseBuffer	call site: 00125	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
3	44	dtdCreate	call site: 00044	expat_free
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	25	expat_malloc	call site: 00025	expat_free
2	33	parserCreate	call site: 00033	expat_free
2	156	expat_realloc	call site: 00156	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	150	expat_realloc	call site: 00150	expat_free

Runtime coverage analysis

Covered functions

283

Functions that are reachable but not covered

17

Reachable functions

91

Percentage of reachable functions covered

81.32%

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/expat/expat/fuzz/xml_parsebuffer_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	62
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parse_fuzzer_ISO-8859-1

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	40	14.8%
gold	[1:9]	6	2.22%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	1	0.37%
lawngreen	50+	223	82.5%
All colors	270	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	123	XML_Parse	call site: 00123	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	154	expat_realloc	call site: 00154	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	25	expat_malloc	call site: 00025	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	148	expat_realloc	call site: 00148	expat_free
1	186	addBinding	call site: 00186	expat_free
1	191	XML_Parse	call site: 00191	startParsing

Runtime coverage analysis

Covered functions

284

Functions that are reachable but not covered

17

Reachable functions

92

Percentage of reachable functions covered

81.52%

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/expat/expat/fuzz/xml_parse_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	63
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_parsebuffer_fuzzer_UTF-16

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	44	16.3%
gold	[1:9]	0	0.0%
yellow	[10:29]	2	0.74%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	223	82.8%
All colors	269	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	125	XML_ParseBuffer	call site: 00125	generate_hash_secret_salt
4	13	getDebugLevel	call site: 00013	__errno_location
3	44	dtdCreate	call site: 00044	expat_free
2	9	expat_heap_increase_tolerable	call site: 00009	expat_heap_stat
2	25	expat_malloc	call site: 00025	expat_free
2	33	parserCreate	call site: 00033	expat_free
2	156	expat_realloc	call site: 00156	expat_heap_stat
1	20	parserCreate	call site: 00020	expat_heap_stat
1	31	expat_free	call site: 00031	expat_heap_stat
1	58	parserInit	call site: 00058	XML_ParserFree
1	119	may_stop_character_handler	call site: 00119	__assert_fail
1	150	expat_realloc	call site: 00150	expat_free

Runtime coverage analysis

Covered functions

283

Functions that are reachable but not covered

17

Reachable functions

91

Percentage of reachable functions covered

81.32%

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/expat/expat/fuzz/xml_parsebuffer_fuzzer.c	5
/src/expat/expat/lib/xmlparse.c	62
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	6

Fuzzer: xml_lpm_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	598	60.0%
gold	[1:9]	35	3.51%
yellow	[10:29]	6	0.60%
greenyellow	[30:49]	2	0.20%
lawngreen	50+	355	35.6%
All colors	996	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
117	316	protobuf_mutator::ConstFieldInstance::reflection() const	call site: 00316	__assert_fail
68	203	protobuf_mutator::(anonymous namespace)::UnpackIfAny(google::protobuf::Message const&)	call site: 00203	_ZNSt4pairIKPKN6google8protobuf7MessageESt10unique_ptrIS2_St14default_deleteIS2_EEEC2IS4_S9_TnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairISD_SE_EEEbE4typeELb1EEEOSD_OSE_
51	451	protobuf_mutator::FieldInstance::Store(protobuf_mutator::ConstFieldInstance::Enum const&) const	call site: 00451	__assert_fail
47	43	xml_lpm_fuzzer::Testcase::Testcase()	call site: 00043	_ZNSt5tupleIJPN6google8protobuf7MessageESt14default_deleteIS2_EEEC2IS3_S5_TnNSt9enable_ifIXsr6__and_ISt37__is_implicitly_default_constructibleIT_ES9_IT0_EEE5valueEbE4typeELb1EEEv
36	126	protobuf_mutator::Mutator::~Mutator()	call site: 00126	__cxa_guard_release
31	846	lookup	call site: 00846	setContext
30	575	TestOneProtoInput(xml_lpm_fuzzer::Testcase const&)	call site: 00575
24	178	protobuf_mutator::(anonymous namespace)::UnpackIfAny(google::protobuf::Message const&)	call site: 00178	_ZNSt5tupleIJPN6google8protobuf7MessageESt14default_deleteIS2_EEEC2IS3_S5_TnNSt9enable_ifIXsr6__and_ISt37__is_implicitly_default_constructibleIT_ES9_IT0_EEE5valueEbE4typeELb1EEEv
19	894	XML_Parse	call site: 00894	generate_hash_secret_salt
18	515	protobuf_mutator::(anonymous namespace)::CastToAny(google::protobuf::Message*)	call site: 00515
10	32	xml_lpm_fuzzer::Testcase::Testcase()	call site: 00032	__clang_call_terminate
10	115	protobuf_mutator::Mutator::Mutator()	call site: 00115	__cxa_atexit

Runtime coverage analysis

Covered functions

371

Functions that are reachable but not covered

616

Reachable functions

867

Percentage of reachable functions covered

28.95%

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/expat/expat/fuzz/xml_lpm_fuzzer.cpp	28
/src/expat/build/xml_lpm_fuzzer.pb.cc	4
/usr/include/google/protobuf/message.h	4
/usr/include/google/protobuf/message_lite.h	4
/usr/include/google/protobuf/metadata.h	2
/usr/include/google/protobuf/metadata_lite.h	5
/usr/include/google/protobuf/generated_message_util.h	2
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/atomic	1
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/atomic_base.h	1
/usr/include/google/protobuf/repeated_field.h	18
/usr/include/google/protobuf/unknown_field_set.h	2
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/libfuzzer/libfuzzer_macro.cc	6
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_vector.h	22
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/allocator.h	9
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/ext/new_allocator.h	23
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/unique_ptr.h	12
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/tuple	10
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/alloc_traits.h	12
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_iterator.h	8
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/binary_format.cc	2
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/text_format.cc	2
/usr/include/google/protobuf/text_format.h	1
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/libfuzzer/libfuzzer_mutator.h	2
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/mutator.h	2
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/random.h	7
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/random.tcc	1
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/unordered_map.h	5
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/hashtable.h	17
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/hashtable_policy.h	37
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/ext/aligned_buffer.h	4
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/std_function.h	2
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/ptr_traits.h	3
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/mutator.cc	21
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/port/protobuf.h	2
/usr/include/google/protobuf/any.pb.h	3
/usr/include/google/protobuf/arenastring.h	3
/usr/include/google/protobuf/descriptor.h	22
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_pair.h	1
/usr/include/google/protobuf/stubs/once.h	2
/usr/include/google/protobuf/descriptor.pb.h	1
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/field_instance.h	58
/src/expat/build/xml_lpm_fuzzer.pb.h	12
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/vector.tcc	2
/src/expat/expat/lib/xmlparse.c	76
/src/expat/expat/lib/xmlrole.c	2
/src/expat/expat/lib/xmltok_ns.c	3
/src/expat/expat/lib/xmltok.c	2
/src/expat/expat/lib/siphash.h	4

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
externalParEntInitProcessor	/src/expat/expat/lib/xmlparse.c	4	['N/A', 'N/A', 'N/A', 'N/A']	11	0	73	8	4	74	0	1372	1102
protobuf_mutator::libfuzzer::(anonymousnamespace)::CrossOverMessages(unsignedint,protobuf_mutator::libfuzzer::(anonymousnamespace)::InputReaderconst&,protobuf_mutator::libfuzzer::(anonymousnamespace)::InputReaderconst&,protobuf_mutator::libfuzzer::(anonymousnamespace)::OutputWriter*,google::protobuf::Message*,google::protobuf::Message*)	/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/libfuzzer/libfuzzer_macro.cc	6	['int', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A']	15	0	72	8	2	1185	2	1535	878
xml_lpm_fuzzer::Testcase::MergePartialFromCodedStream(google::protobuf::io::CodedInputStream*)	/src/expat/build/xml_lpm_fuzzer.pb.cc	2	['N/A', 'N/A']	13	0	369	64	21	233	0	383	251
normal_contentTok	/src/expat/expat/lib/xmltok_impl.c	4	['N/A', 'N/A', 'N/A', 'N/A']	3	0	567	86	24	10	0	241	241
big2_contentTok	/src/expat/expat/lib/xmltok_impl.c	4	['N/A', 'N/A', 'N/A', 'N/A']	6	0	624	97	27	11	0	188	188
little2_contentTok	/src/expat/expat/lib/xmltok_impl.c	4	['N/A', 'N/A', 'N/A', 'N/A']	6	0	621	97	27	11	0	188	170
protobuf_xml_5flpm_5ffuzzer_2eproto::StaticDescriptorInitializer::StaticDescriptorInitializer()	/src/expat/build/xml_lpm_fuzzer.pb.cc	1	['N/A']	11	0	15	3	2	72	0	122	96
normal_prologTok	/src/expat/expat/lib/xmltok_impl.c	4	['N/A', 'N/A', 'N/A', 'N/A']	2	0	1330	206	40	7	0	155	91
XmlParseXmlDeclNS	/src/expat/expat/lib/xmltok_ns.c	10	['int', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A', 'N/A']	3	0	42	3	2	7	0	84	72
big2_prologTok	/src/expat/expat/lib/xmltok_impl.c	4	['N/A', 'N/A', 'N/A', 'N/A']	3	0	1293	194	33	8	0	130	70

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

Functions statically reachable by fuzzers

961 / 1529

Cyclomatic complexity statically reachable by fuzzers

4740 / 6932

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/expat/expat/fuzz/xml_parsebuffer_fuzzer.c

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=['XML_ParseBuffer', 'getDebugLevel', 'dtdCreate', 'expat_heap_increase_tolerable', 'expat_malloc', 'parserCreate', 'expat_realloc', 'expat_free', 'parserInit']

/src/expat/expat/fuzz/xml_parse_fuzzer.c

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=['XML_Parse', 'getDebugLevel', 'expat_heap_increase_tolerable', 'expat_realloc', 'parserCreate', 'expat_malloc', 'expat_free', 'parserInit', 'may_stop_character_handler']

/src/expat/expat/fuzz/xml_parse_fuzzer.c

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=['XML_Parse', 'getDebugLevel', 'dtdCreate', 'expat_heap_increase_tolerable', 'expat_malloc', 'parserCreate', 'expat_realloc', 'expat_free', 'parserInit']

/src/expat/expat/fuzz/xml_parsebuffer_fuzzer.c

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=['XML_ParseBuffer', 'getDebugLevel', 'dtdCreate', 'expat_heap_increase_tolerable', 'expat_malloc', 'parserCreate', 'expat_realloc', 'expat_free', 'parserInit']

/src/expat/expat/fuzz/xml_parse_fuzzer.c

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=['XML_Parse', 'getDebugLevel', 'expat_heap_increase_tolerable', 'expat_realloc', 'parserCreate', 'expat_malloc', 'expat_free', 'parserInit', 'may_stop_character_handler']

/src/expat/expat/fuzz/xml_parse_fuzzer.c

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=['XML_Parse', 'getDebugLevel', 'dtdCreate', 'expat_heap_increase_tolerable', 'expat_malloc', 'parserCreate', 'expat_realloc', 'expat_free', 'parserInit']

/src/expat/expat/fuzz/xml_parsebuffer_fuzzer.c

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=['XML_ParseBuffer', 'getDebugLevel', 'dtdCreate', 'expat_heap_increase_tolerable', 'expat_malloc', 'parserCreate', 'expat_realloc', 'expat_free', 'parserInit']

/src/expat/expat/fuzz/xml_parsebuffer_fuzzer.c

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=['XML_ParseBuffer', 'getDebugLevel', 'expat_heap_increase_tolerable', 'expat_realloc', 'parserCreate', 'expat_malloc', 'expat_free', 'parserInit', 'may_stop_character_handler']

/src/expat/expat/fuzz/xml_parse_fuzzer.c

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=['XML_Parse', 'getDebugLevel', 'dtdCreate', 'expat_heap_increase_tolerable', 'parserCreate', 'expat_realloc', 'expat_malloc', 'expat_free', 'parserInit']

/src/expat/expat/fuzz/xml_parsebuffer_fuzzer.c

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=['XML_ParseBuffer', 'getDebugLevel', 'dtdCreate', 'expat_heap_increase_tolerable', 'expat_malloc', 'parserCreate', 'expat_realloc', 'expat_free', 'parserInit']

/src/expat/expat/fuzz/xml_parse_fuzzer.c

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=['XML_Parse', 'getDebugLevel', 'expat_heap_increase_tolerable', 'expat_realloc', 'parserCreate', 'expat_malloc', 'expat_free', 'parserInit', 'may_stop_character_handler']

/src/expat/expat/fuzz/xml_parsebuffer_fuzzer.c

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=['XML_ParseBuffer', 'getDebugLevel', 'dtdCreate', 'expat_heap_increase_tolerable', 'expat_malloc', 'parserCreate', 'expat_realloc', 'expat_free', 'parserInit']

/src/expat/expat/fuzz/xml_lpm_fuzzer.cpp

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=['protobuf_mutator::ConstFieldInstance::reflection() const', 'protobuf_mutator::(anonymous namespace)::UnpackIfAny(google::protobuf::Message const&)', 'protobuf_mutator::FieldInstance::Store(protobuf_mutator::ConstFieldInstance::Enum const&) const', 'xml_lpm_fuzzer::Testcase::Testcase()', 'protobuf_mutator::Mutator::~Mutator()', 'lookup', 'TestOneProtoInput(xml_lpm_fuzzer::Testcase const&)', 'protobuf_mutator::(anonymous namespace)::UnpackIfAny(google::protobuf::Message const&)', 'XML_Parse', 'protobuf_mutator::(anonymous namespace)::CastToAny(google::protobuf::Message*)']

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
handleUnknownEncoding	32	15	46.87%	['xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_UTF-8', 'xml_parse_fuzzer_UTF-16LE', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16BE', 'xml_lpm_fuzzer', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE']
is_rfc3986_uri_char	92	18	19.56%	['xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_UTF-8', 'xml_parse_fuzzer_UTF-16LE', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16BE', 'xml_lpm_fuzzer', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE']
voidprotobuf_mutator::FieldFunction ::operator() (protobuf_mutator::FieldInstanceconst&)const	39	9	23.07%	['xml_lpm_fuzzer']
protobuf_mutator::(anonymousnamespace)::PostProcessing::Run(google::protobuf::Message*,int)	49	26	53.06%	['xml_lpm_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
	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/hashtable.h	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/std_function.h	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/ext/type_traits.h	[]	[]
/usr/include/google/protobuf/metadata.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/include/google/protobuf/any.pb.h	['xml_lpm_fuzzer']	[]
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/mutator.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/include/google/protobuf/generated_message_util.h	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/random.tcc	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_algobase.h	[]	[]
/usr/include/google/protobuf/stubs/once.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/allocator.h	['xml_lpm_fuzzer']	[]
/usr/include/google/protobuf/message_lite.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bitset	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/unique_ptr.h	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/basic_string.tcc	[]	[]
/usr/include/google/protobuf/metadata_lite.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/atomic_base.h	['xml_lpm_fuzzer']	[]
/src/expat/build/xml_lpm_fuzzer.pb.cc	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/port/protobuf.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/ptr_traits.h	['xml_lpm_fuzzer']	[]
/src/expat/expat/lib/xmltok_ns.c	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']
/usr/include/google/protobuf/stubs/port.h	[]	[]
/src/expat/expat/fuzz/xml_parse_fuzzer.c	['xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parse_fuzzer_UTF-16LE', 'xml_parse_fuzzer_ISO-8859-1']	['xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parse_fuzzer_UTF-16LE', 'xml_parse_fuzzer_ISO-8859-1']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/random.h	['xml_lpm_fuzzer']	[]
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/text_format.cc	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/libfuzzer/libfuzzer_mutator.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/include/google/protobuf/message.h	['xml_lpm_fuzzer']	[]
/usr/include/google/protobuf/descriptor.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/src/expat/expat/lib/xmltok_impl.c	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_pair.h	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/unordered_map.h	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/functional	[]	[]
/usr/include/google/protobuf/text_format.h	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/x86_64-linux-gnu/c++/9/bits/gthr-default.h	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/uniform_int_dist.h	[]	[]
/usr/include/google/protobuf/descriptor.pb.h	['xml_lpm_fuzzer']	[]
/src/expat/expat/lib/siphash.h	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_vector.h	['xml_lpm_fuzzer']	[]
/usr/include/google/protobuf/unknown_field_set.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/libfuzzer/libfuzzer_mutator.cc	[]	[]
/usr/include/google/protobuf/generated_message_reflection.h	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/char_traits.h	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/hashtable_policy.h	['xml_lpm_fuzzer']	[]
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/utf8_fix.cc	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/alloc_traits.h	['xml_lpm_fuzzer']	[]
/usr/include/google/protobuf/arena.h	[]	[]
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/field_instance.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_uninitialized.h	[]	[]
/usr/include/google/protobuf/wire_format_lite_inl.h	[]	[]
/usr/include/google/protobuf/io/coded_stream.h	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/tuple	['xml_lpm_fuzzer']	[]
/src/expat/expat/lib/xmlrole.c	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/ext/new_allocator.h	['xml_lpm_fuzzer']	[]
/src/expat/build/xml_lpm_fuzzer.pb.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/binary_format.cc	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/limits	[]	[]
/src/expat/expat/fuzz/xml_parsebuffer_fuzzer.c	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16']	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16']
/usr/include/google/protobuf/wire_format.h	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/atomic	['xml_lpm_fuzzer']	[]
/src/expat/expat/fuzz/xml_lpm_fuzzer.cpp	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/libfuzzer/libfuzzer_macro.cc	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_iterator.h	['xml_lpm_fuzzer']	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/basic_string.h	[]	[]
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/mutator.cc	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/src/expat/expat/lib/xmlparse.c	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/vector.tcc	['xml_lpm_fuzzer']	[]
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/weighted_reservoir_sampler.h	[]	[]
/usr/include/google/protobuf/arena_impl.h	[]	[]
/usr/include/google/protobuf/repeated_field.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/include/google/protobuf/wire_format_lite.h	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/mutex	[]	[]
/src/expat/expat/lib/xmltok.c	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']	['xml_parsebuffer_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-16', 'xml_parse_fuzzer_US-ASCII', 'xml_parsebuffer_fuzzer_US-ASCII', 'xml_parse_fuzzer_UTF-16BE', 'xml_parse_fuzzer_UTF-8', 'xml_parsebuffer_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_ISO-8859-1', 'xml_parse_fuzzer_UTF-16LE', 'xml_parsebuffer_fuzzer_UTF-8', 'xml_parse_fuzzer_ISO-8859-1', 'xml_parsebuffer_fuzzer_UTF-16', 'xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_construct.h	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/ext/aligned_buffer.h	['xml_lpm_fuzzer']	[]
/usr/include/google/protobuf/arenastring.h	['xml_lpm_fuzzer']	['xml_lpm_fuzzer']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/iostream	[]	[]
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/utility	[]	[]

Directories in report

Directory
/src/expat/build/
/src/expat/expat/fuzz/
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/ext/
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/
/src/expat/expat/lib/
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/src/libfuzzer/
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/x86_64-linux-gnu/c++/9/bits/
/src/expat/build/libprotobuf-mutator/src/libprotobuf-mutator/port/
/usr/include/google/protobuf/stubs/
/usr/include/google/protobuf/
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/
/usr/include/google/protobuf/io/