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https://github.com/KhronosGroup/SPIRV-Tools
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2419f3be86
Adaps the transformations that add OpConstantUndef and OpConstantNull to a module so that pointer undefs are not allowed, and null pointers are only allowed if suitable capabilities are present. Fixes #4357.
70 lines
2.6 KiB
C++
70 lines
2.6 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_global_undef.h"
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#include "source/fuzz/fuzzer_util.h"
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#include "source/opt/reflect.h"
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namespace spvtools {
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namespace fuzz {
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TransformationAddGlobalUndef::TransformationAddGlobalUndef(
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spvtools::fuzz::protobufs::TransformationAddGlobalUndef message)
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: message_(std::move(message)) {}
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TransformationAddGlobalUndef::TransformationAddGlobalUndef(uint32_t fresh_id,
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uint32_t type_id) {
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message_.set_fresh_id(fresh_id);
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message_.set_type_id(type_id);
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}
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bool TransformationAddGlobalUndef::IsApplicable(
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opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
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// A fresh id is required.
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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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auto type = ir_context->get_def_use_mgr()->GetDef(message_.type_id());
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// The type must exist, and must not be a function or pointer type.
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return type != nullptr && opt::IsTypeInst(type->opcode()) &&
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type->opcode() != SpvOpTypeFunction &&
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type->opcode() != SpvOpTypePointer;
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}
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void TransformationAddGlobalUndef::Apply(
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opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
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auto new_instruction = MakeUnique<opt::Instruction>(
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ir_context, SpvOpUndef, message_.type_id(), message_.fresh_id(),
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opt::Instruction::OperandList());
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auto new_instruction_ptr = new_instruction.get();
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ir_context->module()->AddGlobalValue(std::move(new_instruction));
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fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
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// Inform the def-use manager about the new instruction.
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ir_context->get_def_use_mgr()->AnalyzeInstDef(new_instruction_ptr);
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}
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protobufs::Transformation TransformationAddGlobalUndef::ToMessage() const {
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protobufs::Transformation result;
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*result.mutable_add_global_undef() = message_;
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return result;
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}
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std::unordered_set<uint32_t> TransformationAddGlobalUndef::GetFreshIds() const {
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return {message_.fresh_id()};
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}
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} // namespace fuzz
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} // namespace spvtools
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