mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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120 lines
4.1 KiB
C++
120 lines
4.1 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_variable.h"
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#include "source/fuzz/fuzzer_util.h"
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namespace spvtools {
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namespace fuzz {
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TransformationAddGlobalVariable::TransformationAddGlobalVariable(
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const spvtools::fuzz::protobufs::TransformationAddGlobalVariable& message)
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: message_(message) {}
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TransformationAddGlobalVariable::TransformationAddGlobalVariable(
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uint32_t fresh_id, uint32_t type_id, SpvStorageClass storage_class,
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uint32_t initializer_id, bool value_is_irrelevant) {
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message_.set_fresh_id(fresh_id);
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message_.set_type_id(type_id);
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message_.set_storage_class(storage_class);
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message_.set_initializer_id(initializer_id);
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message_.set_value_is_irrelevant(value_is_irrelevant);
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}
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bool TransformationAddGlobalVariable::IsApplicable(
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opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
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// The result id must be fresh.
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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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// The storage class must be Private or Workgroup.
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auto storage_class = static_cast<SpvStorageClass>(message_.storage_class());
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switch (storage_class) {
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case SpvStorageClassPrivate:
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case SpvStorageClassWorkgroup:
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break;
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default:
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assert(false && "Unsupported storage class.");
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return false;
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}
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// The type id must correspond to a type.
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auto type = ir_context->get_type_mgr()->GetType(message_.type_id());
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if (!type) {
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return false;
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}
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// That type must be a pointer type ...
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auto pointer_type = type->AsPointer();
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if (!pointer_type) {
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return false;
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}
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// ... with the right storage class.
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if (pointer_type->storage_class() != storage_class) {
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return false;
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}
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if (message_.initializer_id()) {
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// An initializer is not allowed if the storage class is Workgroup.
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if (storage_class == SpvStorageClassWorkgroup) {
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assert(false &&
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"By construction this transformation should not have an "
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"initializer when Workgroup storage class is used.");
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return false;
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}
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// The initializer id must be the id of a constant. Check this with the
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// constant manager.
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auto constant_id = ir_context->get_constant_mgr()->GetConstantsFromIds(
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{message_.initializer_id()});
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if (constant_id.empty()) {
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return false;
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}
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assert(constant_id.size() == 1 &&
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"We asked for the constant associated with a single id; we should "
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"get a single constant.");
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// The type of the constant must match the pointee type of the pointer.
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if (pointer_type->pointee_type() != constant_id[0]->type()) {
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return false;
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}
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}
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return true;
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}
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void TransformationAddGlobalVariable::Apply(
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opt::IRContext* ir_context,
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TransformationContext* transformation_context) const {
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fuzzerutil::AddGlobalVariable(
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ir_context, message_.fresh_id(), message_.type_id(),
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static_cast<SpvStorageClass>(message_.storage_class()),
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message_.initializer_id());
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if (message_.value_is_irrelevant()) {
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transformation_context->GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
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message_.fresh_id());
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}
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// We have added an instruction to the module, so need to be careful about the
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// validity of existing analyses.
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ir_context->InvalidateAnalysesExceptFor(
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opt::IRContext::Analysis::kAnalysisNone);
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}
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protobufs::Transformation TransformationAddGlobalVariable::ToMessage() const {
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protobufs::Transformation result;
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*result.mutable_add_global_variable() = message_;
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return result;
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}
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} // namespace fuzz
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} // namespace spvtools
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