Commit Graph

6 Commits

Author SHA1 Message Date
Alastair Donaldson
2fdea57d19
spirv-fuzz: Add validator options (#3254)
Allows several validator options to be passed to the fuzzer, to be
used when validation is invoked during fuzzing.
2020-04-02 14:37:59 +01:00
Alastair Donaldson
31acc78821
spirv-fuzz: Add fuzzer pass to perform module donation (#3117)
This change adds a fuzzer pass that allows code from other SPIR-V
modules to be donated into the module under transformation.  It also
changes the command-line options of the tools so that, in fuzzing
mode, a file must be specified that contains the names of available
donor modules.
2020-01-07 08:39:55 +00:00
Alastair Donaldson
52e9cc9301
spirv-fuzz: Improve debugging facilities (#3074)
Adds an option to run the validator on the SPIR-V binary after each
fuzzer pass has been applied, to help identify when the fuzzer has
made the module invalid.  Also adds a helper method to allow dumping
of the sequence of transformations that have been applied to a JSON
file.
2019-11-27 18:05:56 +00:00
Alastair Donaldson
b8ab80843f
Shrinker for spirv-fuzz (#2708)
Adds to spirv-fuzz the option to shrink a sequence of transformations
that lead to an interesting binary to be generated, to find a smaller
sub-sequence of transformations that still lead to an interesting (but
hopefully simpler) binary being generated. The notion of what counts
as "interesting" comes from a user-provided script, the
"interestingness function", similar to the way the spirv-reduce tool
works. The shrinking process will give up after a maximum number of
steps, which can be configured on the command line.

Tests for the combination of fuzzing and shrinking are included, using
a variety of interestingness functions.
2019-07-07 08:55:30 +01:00
Alastair Donaldson
6ccb52b864
Warn when input facts are invalid. (#2699)
Fixes #2621.

Instead of aborting when an invalid input fact is provided, the tool
now warns about the invalid fact and then ignores it.  This is
convenient for example if facts are specified about uniforms with
descriptor sets and bindings that happen to not be present in the
input binary.
2019-06-26 16:40:19 +01:00
Alastair Donaldson
fe9f870130
Add library for spirv-fuzz (#2618)
Adds a library for spirv-fuzz, consisting of a Fuzzer class that will
transform a module with respect to (a) facts about the module provided
via a FactManager class, and (b) a source of random numbers and
parameters to control the transformation process provided via a
FuzzerContext class.  Transformations will be applied via classes that
implement a FuzzerPass interface, and both facts and transformations
will be represented via protobuf messages.  Currently there are no
concrete facts, transformations nor fuzzer passes; these will follow.
2019-05-27 14:34:55 +01:00