mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-23 04:00:05 +00:00
7bc114ba2f
Before this change, spirv-fuzz would replace a pointer argument to a function call with a synonym, which is problematic when the synonym is not a memory object declaration, since function call arguments are required to be memory object declarations. This change adds a check to ensure that such a replacement is not made. Fixes #2896.
75 lines
3.1 KiB
C++
75 lines
3.1 KiB
C++
// Copyright (c) 2019 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef SOURCE_FUZZ_TRANSFORMATION_REPLACE_ID_WITH_SYNONYM_H_
|
|
#define SOURCE_FUZZ_TRANSFORMATION_REPLACE_ID_WITH_SYNONYM_H_
|
|
|
|
#include "source/fuzz/fact_manager.h"
|
|
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
|
|
#include "source/fuzz/transformation.h"
|
|
#include "source/opt/ir_context.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
class TransformationReplaceIdWithSynonym : public Transformation {
|
|
public:
|
|
explicit TransformationReplaceIdWithSynonym(
|
|
const protobufs::TransformationReplaceIdWithSynonym& message);
|
|
|
|
TransformationReplaceIdWithSynonym(
|
|
protobufs::IdUseDescriptor id_use_descriptor,
|
|
protobufs::DataDescriptor data_descriptor,
|
|
uint32_t fresh_id_for_temporary);
|
|
|
|
// - The fact manager must know that the id identified by
|
|
// |message_.id_use_descriptor| is synonomous with
|
|
// |message_.data_descriptor|.
|
|
// - Replacing the id in |message_.id_use_descriptor| by the synonym in
|
|
// |message_.data_descriptor| must respect SPIR-V's rules about uses being
|
|
// dominated by their definitions.
|
|
// - The id must not be an index into an access chain whose base object has
|
|
// struct type, as such indices must be constants.
|
|
// - The id must not be a pointer argument to a function call (because the
|
|
// synonym might not be a memory object declaration).
|
|
// - |fresh_id_for_temporary| must be 0.
|
|
// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2855): the
|
|
// motivation for the temporary is to support the case where an id is
|
|
// synonymous with an element of a composite. Until support for that is
|
|
// implemented, 0 records that no temporary is needed.
|
|
bool IsApplicable(opt::IRContext* context,
|
|
const FactManager& fact_manager) const override;
|
|
|
|
// Replaces the use identified by |message_.id_use_descriptor| with the
|
|
// synonymous id identified by |message_.data_descriptor|.
|
|
// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2855): in due
|
|
// course it will also be necessary to add an additional instruction to pull
|
|
// the synonym out of a composite.
|
|
void Apply(opt::IRContext* context, FactManager* fact_manager) const override;
|
|
|
|
protobufs::Transformation ToMessage() const override;
|
|
|
|
static bool ReplacingUseWithSynonymIsOk(
|
|
opt::IRContext* context, opt::Instruction* use_instruction,
|
|
uint32_t use_in_operand_index, const protobufs::DataDescriptor& synonym);
|
|
|
|
private:
|
|
protobufs::TransformationReplaceIdWithSynonym message_;
|
|
};
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|
|
|
|
#endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_ID_WITH_SYNONYM_H_
|