Commit Graph

8 Commits

Author SHA1 Message Date
Mostafa Ashraf
07f1302352
spirv-fuzz: Support AtomicStore (#4440)
Adds support for atomic operations in TransformationStore and its
associated fuzzer pass.

Fixes #4337.
2021-08-05 14:08:44 +01:00
Mostafa Ashraf
0065c5672d
spirv-fuzz: support AtomicLoad (#4330)
Enhances the TransformationLoad transformation and associated
fuzzer pass to support atomic operations.

Fixes #4324.
2021-08-03 21:51:25 +01:00
Alastair Donaldson
d0c73fcee1
spirv-fuzz: Optimize transformations (#4216)
Avoids blanket invalidation of analyses in several transformations,
instead updating the def-use manager and instruction to block mapping.
2021-03-26 10:22:06 +00:00
Alastair Donaldson
bed84792f9
spirv-fuzz: Call by value and move in transformations (#4208)
Adapts all transformation classes so that their protobuf message is
passed by value and then moved into the message_ field.
2021-03-23 13:31:44 +00:00
Alastair Donaldson
fcb22ecf0f
spirv-fuzz: Report fresh ids in transformations (#3856)
Adds a virtual method, GetFreshIds(), to Transformation. Every
transformation uses this to indicate which ids in its protobuf message
are fresh ids. This means that when replaying a sequence of
transformations the replayer can obtain a smallest id that is not in
use by the module already and that will not be used by any
transformation by necessity. Ids greater than or equal to this id
can be used as overflow ids.

Fixes #3851.
2020-09-29 22:12:49 +01:00
Alastair Donaldson
8d4261bc44
spirv-fuzz: Introduce TransformationContext (#3272)
Some transformations (e.g. TransformationAddFunction) rely on running
the validator to decide whether the transformation is applicable.  A
recent change allowed spirv-fuzz to take validator options, to cater
for the case where a module should be considered valid under
particular conditions.  However, validation during the checking of
transformations had no access to these validator options.

This change introduced TransformationContext, which currently consists
of a fact manager and a set of validator options, but could in the
future have other fields corresponding to other objects that it is
useful to have access to when applying transformations.  Now, instead
of checking and applying transformations in the context of a
FactManager, a TransformationContext is used.  This gives access to
the fact manager as before, and also access to the validator options
when they are needed.
2020-04-02 15:54:46 +01:00
Alastair Donaldson
3d4a0dd48f
spirv-fuzz: Ensure that donated variables are always initialized (#3181)
This change ensures that global and local variables donated from other
modules are always initialized at their declaration in the module
being transformed.  This is to help limit issues related to undefined
behaviour that might arise due to accessing uninitialized memory.

The change also introduces some helper functions in fuzzer_util to
make it easier to find the pointee types of pointer types.
2020-02-10 20:10:41 +00:00
Alastair Donaldson
fe10239f92
spirv-fuzz: Add fuzzer passes to add loads/stores (#3176)
This change adds fuzzer passes that sprinkle loads and stores into a
module at random, with stores restricted to occur in either dead
blocks, or to use pointers for which it is known that the pointee
value does not influence the module's overall behaviour.

The change also generalises the VariableValueIsArbitrary fact to
PointeeValueIsIrrelevant, to allow stores through access chains or
object copies of variables whose values are known to be irrelevant.

The change includes some other minor refactorings.
2020-02-06 16:54:34 +00:00