1 // Copyright (c) 2019 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "source/fuzz/transformation_add_global_undef.h"
16
17 #include "source/fuzz/fuzzer_util.h"
18
19 namespace spvtools {
20 namespace fuzz {
21
TransformationAddGlobalUndef(spvtools::fuzz::protobufs::TransformationAddGlobalUndef message)22 TransformationAddGlobalUndef::TransformationAddGlobalUndef(
23 spvtools::fuzz::protobufs::TransformationAddGlobalUndef message)
24 : message_(std::move(message)) {}
25
TransformationAddGlobalUndef(uint32_t fresh_id,uint32_t type_id)26 TransformationAddGlobalUndef::TransformationAddGlobalUndef(uint32_t fresh_id,
27 uint32_t type_id) {
28 message_.set_fresh_id(fresh_id);
29 message_.set_type_id(type_id);
30 }
31
IsApplicable(opt::IRContext * ir_context,const TransformationContext &) const32 bool TransformationAddGlobalUndef::IsApplicable(
33 opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
34 // A fresh id is required.
35 if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
36 return false;
37 }
38 auto type = ir_context->get_type_mgr()->GetType(message_.type_id());
39 // The type must exist, and must not be a function type.
40 return type && !type->AsFunction();
41 }
42
Apply(opt::IRContext * ir_context,TransformationContext *) const43 void TransformationAddGlobalUndef::Apply(
44 opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
45 auto new_instruction = MakeUnique<opt::Instruction>(
46 ir_context, SpvOpUndef, message_.type_id(), message_.fresh_id(),
47 opt::Instruction::OperandList());
48 auto new_instruction_ptr = new_instruction.get();
49 ir_context->module()->AddGlobalValue(std::move(new_instruction));
50 fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
51 // Inform the def-use manager about the new instruction.
52 ir_context->get_def_use_mgr()->AnalyzeInstDef(new_instruction_ptr);
53 }
54
ToMessage() const55 protobufs::Transformation TransformationAddGlobalUndef::ToMessage() const {
56 protobufs::Transformation result;
57 *result.mutable_add_global_undef() = message_;
58 return result;
59 }
60
GetFreshIds() const61 std::unordered_set<uint32_t> TransformationAddGlobalUndef::GetFreshIds() const {
62 return {message_.fresh_id()};
63 }
64
65 } // namespace fuzz
66 } // namespace spvtools
67