// 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. #include "source/fuzz/transformation_composite_extract.h" #include #include "source/fuzz/data_descriptor.h" #include "source/fuzz/fuzzer_util.h" #include "source/fuzz/instruction_descriptor.h" namespace spvtools { namespace fuzz { TransformationCompositeExtract::TransformationCompositeExtract( const spvtools::fuzz::protobufs::TransformationCompositeExtract& message) : message_(message) {} TransformationCompositeExtract::TransformationCompositeExtract( const protobufs::InstructionDescriptor& instruction_to_insert_before, uint32_t fresh_id, uint32_t composite_id, std::vector&& index) { *message_.mutable_instruction_to_insert_before() = instruction_to_insert_before; message_.set_fresh_id(fresh_id); message_.set_composite_id(composite_id); for (auto an_index : index) { message_.add_index(an_index); } } bool TransformationCompositeExtract::IsApplicable( opt::IRContext* ir_context, const TransformationContext& /*unused*/) const { if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) { return false; } auto instruction_to_insert_before = FindInstruction(message_.instruction_to_insert_before(), ir_context); if (!instruction_to_insert_before) { return false; } auto composite_instruction = ir_context->get_def_use_mgr()->GetDef(message_.composite_id()); if (!composite_instruction) { return false; } if (auto block = ir_context->get_instr_block(composite_instruction)) { if (composite_instruction == instruction_to_insert_before || !ir_context->GetDominatorAnalysis(block->GetParent()) ->Dominates(composite_instruction, instruction_to_insert_before)) { return false; } } assert(composite_instruction->type_id() && "An instruction in a block cannot have a result id but no type id."); auto composite_type = ir_context->get_type_mgr()->GetType(composite_instruction->type_id()); if (!composite_type) { return false; } if (!fuzzerutil::CanInsertOpcodeBeforeInstruction( SpvOpCompositeExtract, instruction_to_insert_before)) { return false; } return fuzzerutil::WalkCompositeTypeIndices(ir_context, composite_instruction->type_id(), message_.index()) != 0; } void TransformationCompositeExtract::Apply( opt::IRContext* ir_context, TransformationContext* transformation_context) const { opt::Instruction::OperandList extract_operands; extract_operands.push_back({SPV_OPERAND_TYPE_ID, {message_.composite_id()}}); for (auto an_index : message_.index()) { extract_operands.push_back({SPV_OPERAND_TYPE_LITERAL_INTEGER, {an_index}}); } auto composite_instruction = ir_context->get_def_use_mgr()->GetDef(message_.composite_id()); auto extracted_type = fuzzerutil::WalkCompositeTypeIndices( ir_context, composite_instruction->type_id(), message_.index()); FindInstruction(message_.instruction_to_insert_before(), ir_context) ->InsertBefore(MakeUnique( ir_context, SpvOpCompositeExtract, extracted_type, message_.fresh_id(), extract_operands)); fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id()); ir_context->InvalidateAnalysesExceptFor( opt::IRContext::Analysis::kAnalysisNone); // Add the fact that the id storing the extracted element is synonymous with // the index into the structure. std::vector indices; for (auto an_index : message_.index()) { indices.push_back(an_index); } protobufs::DataDescriptor data_descriptor_for_extracted_element = MakeDataDescriptor(message_.composite_id(), std::move(indices)); protobufs::DataDescriptor data_descriptor_for_result_id = MakeDataDescriptor(message_.fresh_id(), {}); transformation_context->GetFactManager()->AddFactDataSynonym( data_descriptor_for_extracted_element, data_descriptor_for_result_id, ir_context); } protobufs::Transformation TransformationCompositeExtract::ToMessage() const { protobufs::Transformation result; *result.mutable_composite_extract() = message_; return result; } } // namespace fuzz } // namespace spvtools