High level conclusions

Fuzzers reach 83.19% code coverage.

Fuzzers reach 50.17% of cyclomatic complexity.

Fuzzers reach 53.78% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

128 / 238

Cyclomatic complexity statically reachable by fuzzers

879 / 1752

Runtime code coverage of functions

198 / 238

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: exif_from_data_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	143	15.3%
gold	[1:9]	36	3.87%
yellow	[10:29]	41	4.41%
greenyellow	[30:49]	35	3.76%
lawngreen	50+	674	72.5%
All colors	929	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
49	796	exif_entry_initialize	call site: 00796	exif_entry_alloc
26	766	exif_entry_initialize	call site: 00766	exif_entry_alloc
8	738	exif_entry_initialize	call site: 00738	exif_entry_initialize_gps
5	714	get_support_level_any_type	call site: 00714	exif_content_remove_entry
4	750	exif_entry_initialize	call site: 00750	exif_entry_alloc
4	758	exif_entry_initialize	call site: 00758	exif_entry_alloc
4	861	LLVMFuzzerTestOneInput	call site: 00861	exif_data_foreach_content
3	31	exif_content_free	call site: 00031	exif_log_free
3	640	exif_entry_alloc	call site: 00640	exif_entry_log
3	692	exif_entry_realloc	call site: 00692	exif_log
3	851	exif_entry_initialize	call site: 00851	exif_entry_alloc
2	72	exif_data_load_data	call site: 00072	exif_log

Runtime coverage analysis

Covered functions

161

Functions that are reachable but not covered

26

Reachable functions

137

Percentage of reachable functions covered

81.02%

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
exif_from_data_fuzzer.cc	5
libexif/libexif/exif-data.c	24
libexif/libexif/exif-mem.c	10
libexif/libexif/exif-content.c	11
libexif/libexif/exif-entry.c	16
libexif/libexif/exif-log.c	5
libexif/libexif/exif-mnote-data.c	10
libexif/libexif/exif-utils.c	13
libexif/libexif/exif-tag.c	10
libexif/libexif/exif-ifd.c	1
libexif/libexif/exif-format.c	2
libexif/libexif/olympus/exif-mnote-data-olympus.c	3
libexif/libexif/canon/exif-mnote-data-canon.c	2
libexif/libexif/fuji/exif-mnote-data-fuji.c	2
libexif/libexif/pentax/exif-mnote-data-pentax.c	2
libexif/libexif/exif-gps-ifd.c	1

Fuzzer: exif_loader_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	141	15.5%
gold	[1:9]	42	4.64%
yellow	[10:29]	29	3.20%
greenyellow	[30:49]	49	5.41%
lawngreen	50+	644	71.1%
All colors	905	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
49	818	exif_entry_initialize	call site: 00818	exif_entry_alloc
26	788	exif_entry_initialize	call site: 00788	exif_entry_alloc
8	760	exif_entry_initialize	call site: 00760	exif_entry_initialize_gps
5	736	get_support_level_any_type	call site: 00736	exif_content_remove_entry
4	772	exif_entry_initialize	call site: 00772	exif_entry_alloc
4	780	exif_entry_initialize	call site: 00780	exif_entry_alloc
3	51	exif_content_free	call site: 00051	exif_log_free
3	662	exif_entry_alloc	call site: 00662	exif_entry_log
3	714	exif_entry_realloc	call site: 00714	exif_log
3	873	exif_entry_initialize	call site: 00873	exif_entry_alloc
2	75	exif_data_log	call site: 00075	exif_log_unref
2	96	exif_data_load_data	call site: 00096	exif_log

Runtime coverage analysis

Covered functions

183

Functions that are reachable but not covered

25

Reachable functions

143

Percentage of reachable functions covered

82.52%

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
exif_loader_fuzzer.cc	4
libexif/libexif/exif-loader.c	9
libexif/libexif/exif-mem.c	10
libexif/libexif/exif-log.c	5
libexif/libexif/exif-data.c	20
libexif/libexif/exif-content.c	12
libexif/libexif/exif-entry.c	16
libexif/libexif/exif-mnote-data.c	13
libexif/libexif/exif-utils.c	13
libexif/libexif/exif-tag.c	10
libexif/libexif/exif-ifd.c	1
libexif/libexif/exif-format.c	2
libexif/libexif/olympus/exif-mnote-data-olympus.c	3
libexif/libexif/canon/exif-mnote-data-canon.c	2
libexif/libexif/fuji/exif-mnote-data-fuji.c	2
libexif/libexif/pentax/exif-mnote-data-pentax.c	2
libexif/libexif/exif-gps-ifd.c	1

Fuzzer: inspector/light/source_filesexif_from_data_fuzzer.cc

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	143	15.3%
gold	[1:9]	36	3.87%
yellow	[10:29]	41	4.41%
greenyellow	[30:49]	35	3.76%
lawngreen	50+	674	72.5%
All colors	929	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
49	796	exif_entry_initialize	call site: 00796	exif_entry_alloc
26	766	exif_entry_initialize	call site: 00766	exif_entry_alloc
8	738	exif_entry_initialize	call site: 00738	exif_entry_initialize_gps
5	714	get_support_level_any_type	call site: 00714	exif_content_remove_entry
4	750	exif_entry_initialize	call site: 00750	exif_entry_alloc
4	758	exif_entry_initialize	call site: 00758	exif_entry_alloc
4	861	LLVMFuzzerTestOneInput	call site: 00861	exif_data_foreach_content
3	31	exif_content_free	call site: 00031	exif_log_free
3	640	exif_entry_alloc	call site: 00640	exif_entry_log
3	692	exif_entry_realloc	call site: 00692	exif_log
3	851	exif_entry_initialize	call site: 00851	exif_entry_alloc
2	72	exif_data_load_data	call site: 00072	exif_log

Runtime coverage analysis

Covered functions

200

Functions that are reachable but not covered

26

Reachable functions

137

Percentage of reachable functions covered

81.02%

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
inspector/light/source_filesexif_from_data_fuzzer.cc	5
libexif/libexif/exif-data.c	24
libexif/libexif/exif-mem.c	10
libexif/libexif/exif-content.c	11
libexif/libexif/exif-entry.c	16
libexif/libexif/exif-log.c	5
libexif/libexif/exif-mnote-data.c	10
libexif/libexif/exif-utils.c	13
libexif/libexif/exif-tag.c	10
libexif/libexif/exif-ifd.c	1
libexif/libexif/exif-format.c	2
libexif/libexif/olympus/exif-mnote-data-olympus.c	3
libexif/libexif/canon/exif-mnote-data-canon.c	2
libexif/libexif/fuji/exif-mnote-data-fuji.c	2
libexif/libexif/pentax/exif-mnote-data-pentax.c	2
libexif/libexif/exif-gps-ifd.c	1

Fuzzer: inspector/source-codeexif_from_data_fuzzer.cc

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	143	15.3%
gold	[1:9]	36	3.87%
yellow	[10:29]	41	4.41%
greenyellow	[30:49]	35	3.76%
lawngreen	50+	674	72.5%
All colors	929	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
49	796	exif_entry_initialize	call site: 00796	exif_entry_alloc
26	766	exif_entry_initialize	call site: 00766	exif_entry_alloc
8	738	exif_entry_initialize	call site: 00738	exif_entry_initialize_gps
5	714	get_support_level_any_type	call site: 00714	exif_content_remove_entry
4	750	exif_entry_initialize	call site: 00750	exif_entry_alloc
4	758	exif_entry_initialize	call site: 00758	exif_entry_alloc
4	861	LLVMFuzzerTestOneInput	call site: 00861	exif_data_foreach_content
3	31	exif_content_free	call site: 00031	exif_log_free
3	640	exif_entry_alloc	call site: 00640	exif_entry_log
3	692	exif_entry_realloc	call site: 00692	exif_log
3	851	exif_entry_initialize	call site: 00851	exif_entry_alloc
2	72	exif_data_load_data	call site: 00072	exif_log

Runtime coverage analysis

Covered functions

200

Functions that are reachable but not covered

26

Reachable functions

137

Percentage of reachable functions covered

81.02%

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
inspector/source-codeexif_from_data_fuzzer.cc	5
libexif/libexif/exif-data.c	24
libexif/libexif/exif-mem.c	10
libexif/libexif/exif-content.c	11
libexif/libexif/exif-entry.c	16
libexif/libexif/exif-log.c	5
libexif/libexif/exif-mnote-data.c	10
libexif/libexif/exif-utils.c	13
libexif/libexif/exif-tag.c	10
libexif/libexif/exif-ifd.c	1
libexif/libexif/exif-format.c	2
libexif/libexif/olympus/exif-mnote-data-olympus.c	3
libexif/libexif/canon/exif-mnote-data-canon.c	2
libexif/libexif/fuji/exif-mnote-data-fuji.c	2
libexif/libexif/pentax/exif-mnote-data-pentax.c	2
libexif/libexif/exif-gps-ifd.c	1

Fuzzer: inspector/source-codeexif_loader_fuzzer.cc

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	146	16.1%
gold	[1:9]	36	3.97%
yellow	[10:29]	41	4.53%
greenyellow	[30:49]	35	3.86%
lawngreen	50+	647	71.4%
All colors	905	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
49	818	exif_entry_initialize	call site: 00818	exif_entry_alloc
26	788	exif_entry_initialize	call site: 00788	exif_entry_alloc
8	760	exif_entry_initialize	call site: 00760	exif_entry_initialize_gps
5	736	get_support_level_any_type	call site: 00736	exif_content_remove_entry
4	772	exif_entry_initialize	call site: 00772	exif_entry_alloc
4	780	exif_entry_initialize	call site: 00780	exif_entry_alloc
4	887	exif_loader_free	call site: 00887	exif_data_foreach_content
3	51	exif_content_free	call site: 00051	exif_log_free
3	662	exif_entry_alloc	call site: 00662	exif_entry_log
3	714	exif_entry_realloc	call site: 00714	exif_log
3	873	exif_entry_initialize	call site: 00873	exif_entry_alloc
2	75	exif_data_log	call site: 00075	exif_log_unref

Runtime coverage analysis

Covered functions

200

Functions that are reachable but not covered

25

Reachable functions

143

Percentage of reachable functions covered

82.52%

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
inspector/source-codeexif_loader_fuzzer.cc	4
libexif/libexif/exif-loader.c	9
libexif/libexif/exif-mem.c	10
libexif/libexif/exif-log.c	5
libexif/libexif/exif-data.c	20
libexif/libexif/exif-content.c	12
libexif/libexif/exif-entry.c	16
libexif/libexif/exif-mnote-data.c	13
libexif/libexif/exif-utils.c	13
libexif/libexif/exif-tag.c	10
libexif/libexif/exif-ifd.c	1
libexif/libexif/exif-format.c	2
libexif/libexif/olympus/exif-mnote-data-olympus.c	3
libexif/libexif/canon/exif-mnote-data-canon.c	2
libexif/libexif/fuji/exif-mnote-data-fuji.c	2
libexif/libexif/pentax/exif-mnote-data-pentax.c	2
libexif/libexif/exif-gps-ifd.c	1

Fuzzer: inspector/light/source_filesexif_loader_fuzzer.cc

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	146	16.1%
gold	[1:9]	36	3.97%
yellow	[10:29]	41	4.53%
greenyellow	[30:49]	35	3.86%
lawngreen	50+	647	71.4%
All colors	905	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
49	818	exif_entry_initialize	call site: 00818	exif_entry_alloc
26	788	exif_entry_initialize	call site: 00788	exif_entry_alloc
8	760	exif_entry_initialize	call site: 00760	exif_entry_initialize_gps
5	736	get_support_level_any_type	call site: 00736	exif_content_remove_entry
4	772	exif_entry_initialize	call site: 00772	exif_entry_alloc
4	780	exif_entry_initialize	call site: 00780	exif_entry_alloc
4	887	exif_loader_free	call site: 00887	exif_data_foreach_content
3	51	exif_content_free	call site: 00051	exif_log_free
3	662	exif_entry_alloc	call site: 00662	exif_entry_log
3	714	exif_entry_realloc	call site: 00714	exif_log
3	873	exif_entry_initialize	call site: 00873	exif_entry_alloc
2	75	exif_data_log	call site: 00075	exif_log_unref

Runtime coverage analysis

Covered functions

200

Functions that are reachable but not covered

25

Reachable functions

143

Percentage of reachable functions covered

82.52%

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
inspector/light/source_filesexif_loader_fuzzer.cc	4
libexif/libexif/exif-loader.c	9
libexif/libexif/exif-mem.c	10
libexif/libexif/exif-log.c	5
libexif/libexif/exif-data.c	20
libexif/libexif/exif-content.c	12
libexif/libexif/exif-entry.c	16
libexif/libexif/exif-mnote-data.c	13
libexif/libexif/exif-utils.c	13
libexif/libexif/exif-tag.c	10
libexif/libexif/exif-ifd.c	1
libexif/libexif/exif-format.c	2
libexif/libexif/olympus/exif-mnote-data-olympus.c	3
libexif/libexif/canon/exif-mnote-data-canon.c	2
libexif/libexif/fuji/exif-mnote-data-fuji.c	2
libexif/libexif/pentax/exif-mnote-data-pentax.c	2
libexif/libexif/exif-gps-ifd.c	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
exif_mnote_data_olympus_get_value	/src/libexif/libexif/olympus/exif-mnote-data-olympus.c	4	['N/A', 'int', 'N/A', 'int']	4	0	66	11	5	15	0	172	128
exif_mnote_data_canon_get_value	/src/libexif/libexif/canon/exif-mnote-data-canon.c	4	['N/A', 'int', 'N/A', 'int']	4	0	64	8	4	20	0	133	95
exif_mnote_data_olympus_load	/src/libexif/libexif/olympus/exif-mnote-data-olympus.c	3	['N/A', 'N/A', 'int']	2	0	1176	131	47	14	0	109	56
exif_entry_fix	/src/libexif/libexif/exif-entry.c	1	['N/A']	3	0	922	139	31	35	0	187	55
exif_mnote_data_pentax_get_value	/src/libexif/libexif/pentax/exif-mnote-data-pentax.c	4	['N/A', 'int', 'N/A', 'int']	3	0	58	8	4	11	0	83	49
exif_mnote_data_pentax_load	/src/libexif/libexif/pentax/exif-mnote-data-pentax.c	3	['N/A', 'N/A', 'int']	2	0	648	72	28	12	0	78	37

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

Functions statically reachable by fuzzers

151 / 238

Cyclomatic complexity statically reachable by fuzzers

1297 / 1752

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.

exif_from_data_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=['exif_entry_initialize', 'get_support_level_any_type', 'LLVMFuzzerTestOneInput', 'exif_content_free', 'exif_entry_alloc', 'exif_entry_realloc']

exif_loader_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=['exif_entry_initialize', 'get_support_level_any_type', 'exif_content_free', 'exif_entry_alloc', 'exif_entry_realloc']

inspector/light/source_filesexif_from_data_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=['exif_entry_initialize', 'get_support_level_any_type', 'LLVMFuzzerTestOneInput', 'exif_content_free', 'exif_entry_alloc', 'exif_entry_realloc']

inspector/source-codeexif_from_data_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=['exif_entry_initialize', 'get_support_level_any_type', 'LLVMFuzzerTestOneInput', 'exif_content_free', 'exif_entry_alloc', 'exif_entry_realloc']

inspector/source-codeexif_loader_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=['exif_entry_initialize', 'get_support_level_any_type', 'exif_loader_free', 'exif_content_free', 'exif_entry_alloc', 'exif_entry_realloc']

inspector/light/source_filesexif_loader_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=['exif_entry_initialize', 'get_support_level_any_type', 'exif_loader_free', 'exif_content_free', 'exif_entry_alloc', 'exif_entry_realloc']

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
exif_entry_initialize	320	81	25.31%	['/src/inspector/light/source_files/src/exif_loader_fuzzer.cc', 'exif_loader_fuzzer', 'exif_from_data_fuzzer', '/src/inspector/source-code/src/exif_loader_fuzzer.cc', '/src/inspector/light/source_files/src/exif_from_data_fuzzer.cc', '/src/inspector/source-code/src/exif_from_data_fuzzer.cc']

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/libexif/libexif/exif-data.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
	[]	[]
/src/libexif/libexif/exif-mnote-data.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/olympus/exif-mnote-data-olympus.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/exif-ifd.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/exif-tag.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/exif-entry.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/fuji/mnote-fuji-tag.c	[]	[]
/src/libexif/libexif/pentax/exif-mnote-data-pentax.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/inspector/source-code/src/exif_loader_fuzzer.cc	['inspector/source-codeexif_loader_fuzzer.cc']	['inspector/source-codeexif_loader_fuzzer.cc']
/src/libexif/libexif/exif-content.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/exif-loader.c	['exif_loader_fuzzer', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_loader_fuzzer', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/canon/mnote-canon-entry.c	[]	[]
/src/libexif/libexif/pentax/mnote-pentax-entry.c	[]	[]
/src/libexif/libexif/exif-format.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/fuji/mnote-fuji-entry.c	[]	[]
/src/libexif/libexif/olympus/mnote-olympus-tag.c	[]	[]
/src/libexif/libexif/fuji/exif-mnote-data-fuji.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/exif-mem.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/pentax/mnote-pentax-tag.c	[]	[]
/src/inspector/light/source_files/src/exif_loader_fuzzer.cc	['inspector/light/source_filesexif_loader_fuzzer.cc']	['inspector/light/source_filesexif_loader_fuzzer.cc']
/src/exif_loader_fuzzer.cc	['exif_loader_fuzzer']	['exif_loader_fuzzer']
/src/inspector/light/source_files/src/exif_from_data_fuzzer.cc	['inspector/light/source_filesexif_from_data_fuzzer.cc']	['inspector/light/source_filesexif_from_data_fuzzer.cc']
/src/libexif/libexif/canon/exif-mnote-data-canon.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/canon/mnote-canon-tag.c	[]	[]
/src/inspector/source-code/src/exif_from_data_fuzzer.cc	['inspector/source-codeexif_from_data_fuzzer.cc']	['inspector/source-codeexif_from_data_fuzzer.cc']
/src/libexif/libexif/exif-gps-ifd.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	[]
/src/libexif/libexif/exif-utils.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/exif-log.c	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']	['exif_from_data_fuzzer', 'exif_loader_fuzzer', 'inspector/light/source_filesexif_from_data_fuzzer.cc', 'inspector/source-codeexif_from_data_fuzzer.cc', 'inspector/source-codeexif_loader_fuzzer.cc', 'inspector/light/source_filesexif_loader_fuzzer.cc']
/src/libexif/libexif/olympus/mnote-olympus-entry.c	[]	[]
/src/exif_from_data_fuzzer.cc	['exif_from_data_fuzzer']	['exif_from_data_fuzzer']

Directories in report

Directory
/src/
/src/libexif/libexif/canon/
/src/inspector/light/source_files/src/
/src/libexif/libexif/
/src/inspector/source-code/src/
/src/libexif/libexif/olympus/
/src/libexif/libexif/fuji/
/src/libexif/libexif/pentax/