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https://github.com/KhronosGroup/SPIRV-Tools
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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.
88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
// Copyright (c) 2019 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_add_constant_scalar.h"
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#include "source/fuzz/fuzzer_util.h"
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namespace spvtools {
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namespace fuzz {
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TransformationAddConstantScalar::TransformationAddConstantScalar(
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const spvtools::fuzz::protobufs::TransformationAddConstantScalar& message)
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: message_(message) {}
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TransformationAddConstantScalar::TransformationAddConstantScalar(
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uint32_t fresh_id, uint32_t type_id, std::vector<uint32_t> words) {
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message_.set_fresh_id(fresh_id);
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message_.set_type_id(type_id);
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for (auto word : words) {
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message_.add_word(word);
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}
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}
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bool TransformationAddConstantScalar::IsApplicable(
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opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
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// The id needs to be fresh.
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if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
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return false;
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}
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// The type id for the scalar must exist and be a type.
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auto type = ir_context->get_type_mgr()->GetType(message_.type_id());
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if (!type) {
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return false;
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}
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uint32_t width;
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if (type->AsFloat()) {
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width = type->AsFloat()->width();
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} else if (type->AsInteger()) {
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width = type->AsInteger()->width();
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} else {
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return false;
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}
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// The number of words is the integer floor of the width.
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auto words = (width + 32 - 1) / 32;
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// The number of words provided by the transformation needs to match the
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// width of the type.
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return static_cast<uint32_t>(message_.word().size()) == words;
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}
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void TransformationAddConstantScalar::Apply(
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opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
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opt::Instruction::OperandList operand_list;
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for (auto word : message_.word()) {
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operand_list.push_back({SPV_OPERAND_TYPE_LITERAL_INTEGER, {word}});
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}
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ir_context->module()->AddGlobalValue(MakeUnique<opt::Instruction>(
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ir_context, SpvOpConstant, message_.type_id(), message_.fresh_id(),
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operand_list));
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fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
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// We have added an instruction to the module, so need to be careful about the
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// validity of existing analyses.
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ir_context->InvalidateAnalysesExceptFor(
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opt::IRContext::Analysis::kAnalysisNone);
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}
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protobufs::Transformation TransformationAddConstantScalar::ToMessage() const {
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protobufs::Transformation result;
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*result.mutable_add_constant_scalar() = message_;
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return result;
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}
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} // namespace fuzz
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} // namespace spvtools
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