SPIRV-Tools/source/fuzz/transformation_add_constant_composite.cpp
Alastair Donaldson 38d7fbaad0
spirv-fuzz: Transformations to add types, constants and variables (#3101)
This change adds several transformations that allow types, constants,
undefined values and global variables to be added to a module.
2019-12-16 23:54:13 +00:00

131 lines
4.5 KiB
C++

// 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_constant_composite.h"
#include <vector>
#include "source/fuzz/fuzzer_util.h"
namespace spvtools {
namespace fuzz {
TransformationAddConstantComposite::TransformationAddConstantComposite(
const spvtools::fuzz::protobufs::TransformationAddConstantComposite&
message)
: message_(message) {}
TransformationAddConstantComposite::TransformationAddConstantComposite(
uint32_t fresh_id, uint32_t type_id,
const std::vector<uint32_t>& constituent_ids) {
message_.set_fresh_id(fresh_id);
message_.set_type_id(type_id);
for (auto constituent_id : constituent_ids) {
message_.add_constituent_id(constituent_id);
}
}
bool TransformationAddConstantComposite::IsApplicable(
opt::IRContext* context,
const spvtools::fuzz::FactManager& /*unused*/) const {
// Check that the given id is fresh.
if (!fuzzerutil::IsFreshId(context, message_.fresh_id())) {
return false;
}
// Check that the composite type id is an instruction id.
auto composite_type_instruction =
context->get_def_use_mgr()->GetDef(message_.type_id());
if (!composite_type_instruction) {
return false;
}
// Gather up the operands for the composite constant, in the process checking
// whether the given type really defines a composite.
std::vector<uint32_t> constituent_type_ids;
switch (composite_type_instruction->opcode()) {
case SpvOpTypeArray:
for (uint32_t index = 0;
index <
fuzzerutil::GetArraySize(*composite_type_instruction, context);
index++) {
constituent_type_ids.push_back(
composite_type_instruction->GetSingleWordInOperand(0));
}
break;
case SpvOpTypeMatrix:
case SpvOpTypeVector:
for (uint32_t index = 0;
index < composite_type_instruction->GetSingleWordInOperand(1);
index++) {
constituent_type_ids.push_back(
composite_type_instruction->GetSingleWordInOperand(0));
}
break;
case SpvOpTypeStruct:
composite_type_instruction->ForEachInOperand(
[&constituent_type_ids](const uint32_t* member_type_id) {
constituent_type_ids.push_back(*member_type_id);
});
break;
default:
// Not a composite type.
return false;
}
// Check that the number of provided operands matches the number of
// constituents required by the type.
if (constituent_type_ids.size() !=
static_cast<uint32_t>(message_.constituent_id().size())) {
return false;
}
// Check that every provided operand refers to an instruction of the
// corresponding constituent type.
for (uint32_t index = 0; index < constituent_type_ids.size(); index++) {
auto constituent_instruction =
context->get_def_use_mgr()->GetDef(message_.constituent_id(index));
if (!constituent_instruction) {
return false;
}
if (constituent_instruction->type_id() != constituent_type_ids.at(index)) {
return false;
}
}
return true;
}
void TransformationAddConstantComposite::Apply(
opt::IRContext* context, spvtools::fuzz::FactManager* /*unused*/) const {
opt::Instruction::OperandList in_operands;
for (auto constituent_id : message_.constituent_id()) {
in_operands.push_back({SPV_OPERAND_TYPE_ID, {constituent_id}});
}
context->module()->AddGlobalValue(MakeUnique<opt::Instruction>(
context, SpvOpConstantComposite, message_.type_id(), message_.fresh_id(),
in_operands));
fuzzerutil::UpdateModuleIdBound(context, message_.fresh_id());
// We have added an instruction to the module, so need to be careful about the
// validity of existing analyses.
context->InvalidateAnalysesExceptFor(opt::IRContext::Analysis::kAnalysisNone);
}
protobufs::Transformation TransformationAddConstantComposite::ToMessage()
const {
protobufs::Transformation result;
*result.mutable_add_constant_composite() = message_;
return result;
}
} // namespace fuzz
} // namespace spvtools