mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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83 lines
3.1 KiB
C++
83 lines
3.1 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_add_copy_memory.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/instruction_descriptor.h"
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#include "source/fuzz/transformation_add_copy_memory.h"
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namespace spvtools {
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namespace fuzz {
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FuzzerPassAddCopyMemory::FuzzerPassAddCopyMemory(
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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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: FuzzerPass(ir_context, transformation_context, fuzzer_context,
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transformations) {}
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FuzzerPassAddCopyMemory::~FuzzerPassAddCopyMemory() = default;
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void FuzzerPassAddCopyMemory::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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// Check that we can insert an OpCopyMemory before this instruction.
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if (!fuzzerutil::CanInsertOpcodeBeforeInstruction(SpvOpCopyMemory,
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inst_it)) {
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return;
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}
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if (!GetFuzzerContext()->ChoosePercentage(
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GetFuzzerContext()->GetChanceOfAddingCopyMemory())) {
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return;
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}
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// Get all instructions available before |inst_it| according to the
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// domination rules.
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auto instructions = FindAvailableInstructions(
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function, block, inst_it,
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TransformationAddCopyMemory::IsInstructionSupported);
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if (instructions.empty()) {
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return;
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}
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const auto* inst =
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instructions[GetFuzzerContext()->RandomIndex(instructions)];
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// Decide whether to create global or local variable.
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auto storage_class = GetFuzzerContext()->ChooseEven()
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? SpvStorageClassPrivate
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: SpvStorageClassFunction;
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auto pointee_type_id = fuzzerutil::GetPointeeTypeIdFromPointerType(
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GetIRContext(), inst->type_id());
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// Create a pointer type with |storage_class| if needed.
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FindOrCreatePointerType(pointee_type_id, storage_class);
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ApplyTransformation(TransformationAddCopyMemory(
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instruction_descriptor, GetFuzzerContext()->GetFreshId(),
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inst->result_id(), storage_class,
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FindOrCreateZeroConstant(pointee_type_id)));
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});
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}
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} // namespace fuzz
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} // namespace spvtools
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