High level conclusions

Fuzzer refill is blocked:

The runtime code coverage of refill covers 25.0% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer wrap_optimal_fit is blocked:

The runtime code coverage of wrap_optimal_fit covers 20.0% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer wrap_first_fit is blocked:

The runtime code coverage of wrap_first_fit covers 0.0% 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 0.0% of cyclomatic complexity.

Fuzzers reach 2.702% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

6 / 222

Cyclomatic complexity statically reachable by fuzzers

0 / 215

Runtime code coverage of functions

41 / 222

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: wrap_optimal_fit_usize

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	57	91.9%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	5	8.06%
All colors	62	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
45	16	LineNumbers::new	call site: 00016	LineNumbers::get
11	2	Penalties::into	call site: 00002
1	0	EP	call site: 00000

Runtime coverage analysis

Covered functions

53

Functions that are reachable but not covered

2

Reachable functions

3

Percentage of reachable functions covered

33.33%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/wrap_optimal_fit_usize.rs	3
fuzz/fuzz_targets/wrap_optimal_fit.rs	1
src/wrap_algorithms/optimal_fit.rs	19
src/word_separators.rs	3

Fuzzer: unfill

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	10	10.8%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	82	89.1%
All colors	92	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
3	9	textwrap::unfill	call site: 00009	tests::unfill_initial_indent
3	39	NonEmptyLines::next	call site: 00039
2	0	EP	call site: 00000
1	29	core::display_width	call site: 00029	NonEmptyLines::next
1	65	unfill	call site: 00065

Runtime coverage analysis

Covered functions

32

Functions that are reachable but not covered

1

Reachable functions

3

Percentage of reachable functions covered

66.67%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/unfill.rs	3
src/refill.rs	18
src/word_separators.rs	3
src/wrap_algorithms.rs	2
src/wrap.rs	3
src/core.rs	6
src/line_ending.rs	5

Fuzzer: wrap_first_fit

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	34	100.%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	0	0.0%
All colors	34	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
33	0	EP	call site: 00000	LineNumbers::get

Runtime coverage analysis

Covered functions

38

Functions that are reachable but not covered

2

Reachable functions

2

Percentage of reachable functions covered

0.0%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/wrap_first_fit.rs	2
src/wrap_algorithms.rs	12
src/wrap_algorithms/optimal_fit.rs	5

Fuzzer: wrap_optimal_fit

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	60	92.3%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	5	7.69%
All colors	65	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
45	19	LineNumbers::new	call site: 00019	LineNumbers::get
14	2	Penalties::into	call site: 00002	test_roundtrip_tabs
1	0	EP	call site: 00000

Runtime coverage analysis

Covered functions

55

Functions that are reachable but not covered

4

Reachable functions

5

Percentage of reachable functions covered

20.0%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/wrap_optimal_fit.rs	6
tests/indent.rs	1
src/wrap_algorithms/optimal_fit.rs	19
src/word_separators.rs	3

Fuzzer: fill_first_fit

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	84	89.3%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	10	10.6%
All colors	94	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
48	45	core::display_width	call site: 00045	LineEnding::as_str
13	31	core::display_width	call site: 00031	NonEmptyLines::next
12	7	WrapAlgorithm::new_optimal_fit	call site: 00007	tests::unfill_initial_indent
9	21	core::display_width	call site: 00021
2	0	EP	call site: 00000

Runtime coverage analysis

Covered functions

107

Functions that are reachable but not covered

4

Reachable functions

10

Percentage of reachable functions covered

60.0%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/fill_first_fit.rs	5
src/word_separators.rs	3
src/wrap_algorithms.rs	2
src/refill.rs	18
src/wrap.rs	3
src/core.rs	6
src/line_ending.rs	5

Fuzzer: wrap_fast_path

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	9	52.9%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	8	47.0%
All colors	17	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
3	0	EP	call site: 00000
3	8	WrapAlgorithm::new_optimal_fit	call site: 00008
2	12	textwrap::fuzzing::wrap_single_line	call site: 00012
1	15	textwrap::fuzzing::wrap_single_line_slow_path	call site: 00015

Runtime coverage analysis

Covered functions

110

Functions that are reachable but not covered

3

Reachable functions

7

Percentage of reachable functions covered

57.14%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/wrap_fast_path.rs	7
src/word_separators.rs	3
src/wrap_algorithms.rs	2
src/wrap.rs	2

Fuzzer: fill_optimal_fit

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	85	89.4%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	10	10.5%
All colors	95	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
48	46	core::display_width	call site: 00046	LineEnding::as_str
13	7	WrapAlgorithm::new_optimal_fit	call site: 00007	tests::unfill_initial_indent
13	32	core::display_width	call site: 00032	NonEmptyLines::next
9	22	core::display_width	call site: 00022
2	0	EP	call site: 00000

Runtime coverage analysis

Covered functions

114

Functions that are reachable but not covered

4

Reachable functions

10

Percentage of reachable functions covered

60.0%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/fill_optimal_fit.rs	6
src/word_separators.rs	3
src/wrap_algorithms.rs	2
src/refill.rs	18
src/wrap.rs	3
src/core.rs	6
src/line_ending.rs	5

Fuzzer: fill_fast_path

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	85	86.7%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	13	13.2%
All colors	98	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	46	core::display_width	call site: 00046	LineEnding::as_str
13	32	core::display_width	call site: 00032	NonEmptyLines::next
9	11	Options::new	call site: 00011	tests::unfill_initial_indent
9	22	core::display_width	call site: 00022
2	0	EP	call site: 00000
2	7	WrapAlgorithm::new_optimal_fit	call site: 00007
1	96	textwrap::fuzzing::fill_slow_path	call site: 00096

Runtime coverage analysis

Covered functions

114

Functions that are reachable but not covered

3

Reachable functions

5

Percentage of reachable functions covered

40.0%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/fill_fast_path.rs	5
src/word_separators.rs	3
src/wrap_algorithms.rs	2
src/refill.rs	18
src/wrap.rs	3
src/core.rs	6
src/line_ending.rs	5
src/fill.rs	1

Fuzzer: refill

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	32	28.0%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	82	71.9%
All colors	114	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
22	91	textwrap::unfill	call site: 00091	unfill
3	9	textwrap::unfill	call site: 00009	tests::unfill_initial_indent
3	39	NonEmptyLines::next	call site: 00039
2	0	EP	call site: 00000
1	29	core::display_width	call site: 00029	NonEmptyLines::next
1	65	unfill	call site: 00065

Runtime coverage analysis

Covered functions

116

Functions that are reachable but not covered

3

Reachable functions

4

Percentage of reachable functions covered

25.0%

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

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

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzz/fuzz_targets/refill.rs	4
src/refill.rs	26
src/word_separators.rs	3
src/wrap_algorithms.rs	2
src/wrap.rs	3
src/core.rs	6
src/line_ending.rs	5
fuzz/fuzz_targets/wrap_optimal_fit.rs	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

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

Functions statically reachable by fuzzers

6 / 222

Cyclomatic complexity statically reachable by fuzzers

0 / 215

All functions overview

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

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

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

fuzz/fuzz_targets/wrap_optimal_fit_usize.rs

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=['LineNumbers::new', 'Penalties::into']

fuzz/fuzz_targets/unfill.rs

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=['textwrap::unfill', 'NonEmptyLines::next', 'core::display_width', 'unfill']

fuzz/fuzz_targets/wrap_first_fit.rs

Dictionary

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

fuzz/fuzz_targets/wrap_optimal_fit.rs

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=['LineNumbers::new', 'Penalties::into']

fuzz/fuzz_targets/fill_first_fit.rs

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=['core::display_width', 'WrapAlgorithm::new_optimal_fit']

fuzz/fuzz_targets/wrap_fast_path.rs

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=['WrapAlgorithm::new_optimal_fit', 'textwrap::fuzzing::wrap_single_line', 'textwrap::fuzzing::wrap_single_line_slow_path']

fuzz/fuzz_targets/fill_optimal_fit.rs

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=['core::display_width', 'WrapAlgorithm::new_optimal_fit']

fuzz/fuzz_targets/fill_fast_path.rs

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=['core::display_width', 'Options::new', 'WrapAlgorithm::new_optimal_fit', 'textwrap::fuzzing::fill_slow_path']

fuzz/fuzz_targets/refill.rs

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=['textwrap::unfill', 'NonEmptyLines::next', 'core::display_width', 'unfill']

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

New fuzzers

The below fuzzers are templates and suggestions for how to target the set of optimal functions above

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/textwrap/examples/binary-sizes/src/main.rs	[]	[]
/src/textwrap/fuzz/fuzz_targets/refill.rs	['refill']	[]
/src/textwrap/examples/binary-sizes/examples/make-table.rs	[]	[]
/src/textwrap/src/wrap_algorithms/optimal_fit.rs	['wrap_optimal_fit_usize', 'wrap_first_fit', 'wrap_optimal_fit']	['wrap_optimal_fit_usize', 'wrap_first_fit', 'wrap_optimal_fit']
/src/textwrap/fuzz/fuzz_targets/wrap_optimal_fit.rs	['wrap_optimal_fit_usize', 'wrap_optimal_fit', 'refill']	[]
/src/textwrap/tests/version-numbers.rs	[]	[]
/src/textwrap/examples/interactive.rs	[]	[]
/src/textwrap/examples/wasm/src/lib.rs	[]	[]
/src/textwrap/fuzz/fuzz_targets/wrap_optimal_fit_usize.rs	['wrap_optimal_fit_usize']	['wrap_optimal_fit_usize']
/src/textwrap/src/word_separators.rs	['wrap_optimal_fit_usize', 'unfill', 'wrap_optimal_fit', 'fill_first_fit', 'wrap_fast_path', 'fill_optimal_fit', 'fill_fast_path', 'refill']	['wrap_optimal_fit_usize', 'unfill', 'wrap_optimal_fit', 'fill_first_fit', 'wrap_fast_path', 'fill_optimal_fit', 'fill_fast_path', 'refill']
/src/textwrap/src/wrap_algorithms.rs	['unfill', 'wrap_first_fit', 'fill_first_fit', 'wrap_fast_path', 'fill_optimal_fit', 'fill_fast_path', 'refill']	['unfill', 'wrap_first_fit', 'fill_first_fit', 'wrap_fast_path', 'fill_optimal_fit', 'fill_fast_path', 'refill']
/src/textwrap/src/word_splitters.rs	[]	[]
/src/textwrap/fuzz/fuzz_targets/fill_first_fit.rs	['fill_first_fit']	[]
/src/textwrap/src/columns.rs	[]	[]
/src/textwrap/fuzz/fuzz_targets/wrap_first_fit.rs	['wrap_first_fit']	['wrap_first_fit']
/src/textwrap/fuzz/fuzz_targets/unfill.rs	['unfill']	[]
/src/textwrap/fuzz/fuzz_targets/wrap_fast_path.rs	['wrap_fast_path']	[]
/src/textwrap/src/wrap.rs	['unfill', 'fill_first_fit', 'wrap_fast_path', 'fill_optimal_fit', 'fill_fast_path', 'refill']	['fill_first_fit', 'wrap_fast_path', 'fill_optimal_fit', 'fill_fast_path', 'refill']
/src/textwrap/src/line_ending.rs	['unfill', 'fill_first_fit', 'fill_optimal_fit', 'fill_fast_path', 'refill']	['unfill', 'fill_first_fit', 'fill_optimal_fit', 'fill_fast_path', 'refill']
/src/textwrap/benchmarks/linear.rs	[]	[]
/src/textwrap/src/termwidth.rs	[]	[]
/src/textwrap/src/options.rs	[]	[]
/src/textwrap/src/fuzzing.rs	[]	[]
/src/textwrap/src/fill.rs	['fill_fast_path']	[]
/src/textwrap/fuzz/fuzz_targets/fill_fast_path.rs	['fill_fast_path']	[]
/src/textwrap/tests/indent.rs	['wrap_optimal_fit']	[]
/src/textwrap/fuzz/fuzz_targets/fill_optimal_fit.rs	['fill_optimal_fit']	[]
/src/textwrap/src/core.rs	['unfill', 'fill_first_fit', 'fill_optimal_fit', 'fill_fast_path', 'refill']	['unfill', 'fill_first_fit', 'fill_optimal_fit', 'fill_fast_path', 'refill']
/src/textwrap/src/indentation.rs	[]	[]
/src/textwrap/src/refill.rs	['unfill', 'fill_first_fit', 'fill_optimal_fit', 'fill_fast_path', 'refill']	['unfill', 'refill']

Directories in report

Directory
/src/textwrap/examples/binary-sizes/src/
/src/textwrap/examples/wasm/src/
/src/textwrap/src/wrap_algorithms/
/src/textwrap/tests/
/src/textwrap/benchmarks/
/src/textwrap/fuzz/fuzz_targets/
/src/textwrap/examples/
/src/textwrap/src/
/src/textwrap/examples/binary-sizes/examples/

This section shows a list of 3rd party function calls and their relative coverage information. By static analysis of the target project code, all of the 3rd party function call and their caller information, including the source file and line number that initiate the call are captured. The caller source code file and line number are shown in column 2 while column 1 is the function name of the 3rd party function call. Each occurrent of the 3rd party function call will occuply a separate row. Column 3 of each row indicate if the 3rd party call in the source file line is unreachable. Column 4 lists all fuzzers that have covered that particular system call in that specific location (source file and line)during their dynamic fuzzing.

Function in each files in report

Target sink	Callsite location	Reached by fuzzer	Covered by Fuzzers