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https://github.com/KhronosGroup/SPIRV-Tools
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fcb22ecf0f
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.
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
// Copyright (c) 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "source/fuzz/transformation_context.h"
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#include <cassert>
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#include "source/util/make_unique.h"
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namespace spvtools {
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namespace fuzz {
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namespace {
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// An overflow id source that should never be used: its methods assert false.
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// This is the right id source for use during fuzzing, when overflow ids should
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// never be required.
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class NullOverflowIdSource : public OverflowIdSource {
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bool HasOverflowIds() const override {
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assert(false && "Bad attempt to query whether overflow ids are available.");
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return false;
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}
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uint32_t GetNextOverflowId() override {
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assert(false && "Bad attempt to request an overflow id.");
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return 0;
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}
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const std::unordered_set<uint32_t>& GetIssuedOverflowIds() const override {
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assert(false && "Operation not supported.");
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return placeholder_;
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}
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private:
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std::unordered_set<uint32_t> placeholder_;
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};
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} // namespace
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TransformationContext::TransformationContext(
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std::unique_ptr<FactManager> fact_manager,
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spv_validator_options validator_options)
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: fact_manager_(std::move(fact_manager)),
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validator_options_(validator_options),
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overflow_id_source_(MakeUnique<NullOverflowIdSource>()) {}
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TransformationContext::TransformationContext(
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std::unique_ptr<FactManager> fact_manager,
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spv_validator_options validator_options,
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std::unique_ptr<OverflowIdSource> overflow_id_source)
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: fact_manager_(std::move(fact_manager)),
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validator_options_(validator_options),
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overflow_id_source_(std::move(overflow_id_source)) {}
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TransformationContext::~TransformationContext() = default;
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} // namespace fuzz
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} // namespace spvtools
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