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// 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_add_type_struct.h"
#include "source/fuzz/fuzzer_util.h"
namespace spvtools {
namespace fuzz {
TransformationAddTypeStruct::TransformationAddTypeStruct(
protobufs::TransformationAddTypeStruct message)
: message_(std::move(message)) {}
TransformationAddTypeStruct::TransformationAddTypeStruct(
uint32_t fresh_id, const std::vector<uint32_t>& member_type_ids) {
message_.set_fresh_id(fresh_id);
for (auto member_type_id : member_type_ids) {
message_.add_member_type_id(member_type_id);
}
}
bool TransformationAddTypeStruct::IsApplicable(
opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
// A fresh id is required.
if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
return false;
}
for (auto member_type : message_.member_type_id()) {
auto type = ir_context->get_type_mgr()->GetType(member_type);
if (!type || type->AsFunction() ||
fuzzerutil::HasBlockOrBufferBlockDecoration(ir_context, member_type)) {
// The member type id either does not refer to a type, refers to a
// function type, or refers to a block-decorated struct. These cases are
// all illegal.
return false;
}
// From the spec for the BuiltIn decoration:
// - When applied to a structure-type member, that structure type cannot
// be contained as a member of another structure type.
if (type->AsStruct() &&
fuzzerutil::MembersHaveBuiltInDecoration(ir_context, member_type)) {
return false;
}
}
return true;
}
void TransformationAddTypeStruct::Apply(
opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
opt::Instruction::OperandList operands;
operands.reserve(message_.member_type_id().size());
for (auto type_id : message_.member_type_id()) {
const auto* type = ir_context->get_type_mgr()->GetType(type_id);
(void)type; // Make compiler happy in release mode.
assert(type && !type->AsFunction() && "Component's type id is invalid");
if (type->AsStruct()) {
// From the spec for the BuiltIn decoration:
// - When applied to a structure-type member, that structure type cannot
// be contained as a member of another structure type.
assert(!fuzzerutil::MembersHaveBuiltInDecoration(ir_context, type_id) &&
"A member struct has BuiltIn members");
}
operands.push_back({SPV_OPERAND_TYPE_ID, {type_id}});
}
auto type_instruction =
MakeUnique<opt::Instruction>(ir_context, spv::Op::OpTypeStruct, 0,
message_.fresh_id(), std::move(operands));
auto type_instruction_ptr = type_instruction.get();
ir_context->AddType(std::move(type_instruction));
fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
// Inform the def use manager that there is a new definition. Invalidate the
// type manager since we have added a new type.
ir_context->get_def_use_mgr()->AnalyzeInstDef(type_instruction_ptr);
ir_context->InvalidateAnalyses(opt::IRContext::kAnalysisTypes);
}
protobufs::Transformation TransformationAddTypeStruct::ToMessage() const {
protobufs::Transformation result;
*result.mutable_add_type_struct() = message_;
return result;
}
std::unordered_set<uint32_t> TransformationAddTypeStruct::GetFreshIds() const {
return {message_.fresh_id()};
}
} // namespace fuzz
} // namespace spvtools
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