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https://github.com/KhronosGroup/SPIRV-Tools
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620197bd65
This new pass adds some basic ingredients to a module on which future passes are likely to depend, such as boolean constants and some specfic integer and floating-point values. This is not a fuzzer pass in the true sense in that it does not employ randomization, but it makes sense to define it as a fuzzer pass since it is the first of a number of transformations passes that the fuzzer will run on a module.
61 lines
2.1 KiB
C++
61 lines
2.1 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_constant_boolean.h"
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#include "source/fuzz/fuzzer_util.h"
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#include "source/opt/types.h"
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namespace spvtools {
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namespace fuzz {
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namespace transformation {
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using opt::IRContext;
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bool IsApplicable(const protobufs::TransformationAddConstantBoolean& message,
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IRContext* context, const FactManager& /*unused*/) {
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opt::analysis::Bool bool_type;
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if (!context->get_type_mgr()->GetId(&bool_type)) {
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// No OpTypeBool is present.
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return false;
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}
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return fuzzerutil::IsFreshId(context, message.fresh_id());
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}
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void Apply(const protobufs::TransformationAddConstantBoolean& message,
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IRContext* context, FactManager* /*unused*/) {
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opt::analysis::Bool bool_type;
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// Add the boolean constant to the module, ensuring the module's id bound is
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// high enough.
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fuzzerutil::UpdateModuleIdBound(context, message.fresh_id());
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context->module()->AddGlobalValue(
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message.is_true() ? SpvOpConstantTrue : SpvOpConstantFalse,
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message.fresh_id(), context->get_type_mgr()->GetId(&bool_type));
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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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context->InvalidateAnalysesExceptFor(IRContext::Analysis::kAnalysisNone);
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}
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protobufs::TransformationAddConstantBoolean
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MakeTransformationAddConstantBoolean(uint32_t fresh_id, bool is_true) {
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protobufs::TransformationAddConstantBoolean result;
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result.set_fresh_id(fresh_id);
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result.set_is_true(is_true);
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return result;
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}
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} // namespace transformation
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} // namespace fuzz
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} // namespace spvtools
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