Commit 315a2fd

committed

Instrument test utility functions to increase fuzzer efficiency

Fuzz Introspector was reporting a high percentage of fuzz blockers in the `fuzz_diff` test. This means the fuzzing engine was unable to gain visibility into functions lower in the call stack than the blocking functions, making it less effective at producing interesting input data. This clears a large percentage of the fuzz blockers by adding fuzzer instrumentation to them via the `@atheris.instrument_func` decorator.

1 parent 4e212c6 commit 315a2fdCopy full SHA for 315a2fd

File tree

1 file changed

-0

lines changed

fuzzing/fuzz-targets
- fuzz_diff.py

1 file changed

-0

lines changed

`‎fuzzing/fuzz-targets/fuzz_diff.py‎`

Lines changed: 3 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -17,16 +17,19 @@`
`17`	`17`	`class BytesProcessAdapter:`
`18`	`18`	`"""Allows bytes to be used as process objects returned by subprocess.Popen."""`
`19`	`19`
	`20`	`+ @atheris.instrument_func`
`20`	`21`	`def __init__(self, input_string):`
`21`	`22`	`self.stdout = io.BytesIO(input_string)`
`22`	`23`	`self.stderr = io.BytesIO()`
`23`	`24`
	`25`	`+ @atheris.instrument_func`
`24`	`26`	`def wait(self):`
`25`	`27`	`return 0`
`26`	`28`
`27`	`29`	`poll = wait`
`28`	`30`
`29`	`31`
	`32`	`+@atheris.instrument_func`
`30`	`33`	`def TestOneInput(data):`
`31`	`34`	`fdp = atheris.FuzzedDataProvider(data)`
`32`	`35`

0 commit comments

Comments

(0)

Navigation Menu

Search code, repositories, users, issues, pull requests...

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Uh oh!

Commit 315a2fd

File tree

1 file changed

1 file changed

`‎fuzzing/fuzz-targets/fuzz_diff.py‎`

0 commit comments