mirror of
https://gitee.com/openharmony/third_party_spirv-tools
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75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
// Copyright (c) 2020 Vasyl Teliman
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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/fuzzer_pass_mutate_pointers.h"
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#include "source/fuzz/fuzzer_context.h"
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#include "source/fuzz/fuzzer_util.h"
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#include "source/fuzz/transformation_mutate_pointer.h"
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namespace spvtools {
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namespace fuzz {
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FuzzerPassMutatePointers::FuzzerPassMutatePointers(
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opt::IRContext* ir_context, TransformationContext* transformation_context,
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FuzzerContext* fuzzer_context,
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protobufs::TransformationSequence* transformations,
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bool ignore_inapplicable_transformations)
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: FuzzerPass(ir_context, transformation_context, fuzzer_context,
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transformations, ignore_inapplicable_transformations) {}
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void FuzzerPassMutatePointers::Apply() {
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ForEachInstructionWithInstructionDescriptor(
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[this](opt::Function* function, opt::BasicBlock* block,
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opt::BasicBlock::iterator inst_it,
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const protobufs::InstructionDescriptor& instruction_descriptor) {
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if (!GetFuzzerContext()->ChoosePercentage(
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GetFuzzerContext()->GetChanceOfMutatingPointer())) {
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return;
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}
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if (!fuzzerutil::CanInsertOpcodeBeforeInstruction(spv::Op::OpLoad,
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inst_it)) {
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return;
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}
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auto available_pointers = FindAvailableInstructions(
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function, block, inst_it,
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[](opt::IRContext* ir_context, opt::Instruction* inst) {
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return TransformationMutatePointer::IsValidPointerInstruction(
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ir_context, *inst);
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});
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if (available_pointers.empty()) {
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return;
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}
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const auto* pointer_inst =
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available_pointers[GetFuzzerContext()->RandomIndex(
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available_pointers)];
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// Make sure there is an irrelevant constant in the module.
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FindOrCreateZeroConstant(fuzzerutil::GetPointeeTypeIdFromPointerType(
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GetIRContext(), pointer_inst->type_id()),
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true);
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ApplyTransformation(TransformationMutatePointer(
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pointer_inst->result_id(), GetFuzzerContext()->GetFreshId(),
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instruction_descriptor));
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});
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}
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} // namespace fuzz
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} // namespace spvtools
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