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https://github.com/KhronosGroup/SPIRV-Tools
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31acc78821
This change adds a fuzzer pass that allows code from other SPIR-V modules to be donated into the module under transformation. It also changes the command-line options of the tools so that, in fuzzing mode, a file must be specified that contains the names of available donor modules.
89 lines
3.6 KiB
C++
89 lines
3.6 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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#ifndef SOURCE_FUZZ_FUZZER_PASS_DONATE_MODULES_H_
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#define SOURCE_FUZZ_FUZZER_PASS_DONATE_MODULES_H_
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#include <vector>
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#include "source/fuzz/fuzzer_pass.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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// A fuzzer pass that randomly adds code from other SPIR-V modules to the module
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// being transformed.
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class FuzzerPassDonateModules : public FuzzerPass {
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public:
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FuzzerPassDonateModules(
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opt::IRContext* ir_context, FactManager* fact_manager,
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FuzzerContext* fuzzer_context,
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protobufs::TransformationSequence* transformations,
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const std::vector<fuzzerutil::ModuleSupplier>& donor_suppliers);
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~FuzzerPassDonateModules();
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void Apply() override;
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// Donates the global declarations and functions of |donor_ir_context| into
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// the fuzzer pass's IR context.
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void DonateSingleModule(opt::IRContext* donor_ir_context);
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private:
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// Adapts a storage class coming from a donor module so that it will work
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// in a recipient module, e.g. by changing Uniform to Private.
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static SpvStorageClass AdaptStorageClass(SpvStorageClass donor_storage_class);
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// Identifies all external instruction set imports in |donor_ir_context| and
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// populates |original_id_to_donated_id| with a mapping from the donor's id
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// for such an import to a corresponding import in the recipient. Aborts if
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// no such corresponding import is available.
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void HandleExternalInstructionImports(
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opt::IRContext* donor_ir_context,
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std::map<uint32_t, uint32_t>* original_id_to_donated_id);
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// Considers all types, globals, constants and undefs in |donor_ir_context|.
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// For each instruction, uses |original_to_donated_id| to map its result id to
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// either (1) the id of an existing identical instruction in the recipient, or
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// (2) to a fresh id, in which case the instruction is also added to the
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// recipient (with any operand ids that it uses being remapped via
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// |original_id_to_donated_id|).
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void HandleTypesAndValues(
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opt::IRContext* donor_ir_context,
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std::map<uint32_t, uint32_t>* original_id_to_donated_id);
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// Assumes that |donor_ir_context| does not exhibit recursion. Considers the
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// functions in |donor_ir_context|'s call graph in a reverse-topologically-
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// sorted order (leaves-to-root), adding each function to the recipient
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// module, rewritten to use fresh ids and using |original_id_to_donated_id| to
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// remap ids.
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void HandleFunctions(opt::IRContext* donor_ir_context,
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std::map<uint32_t, uint32_t>* original_id_to_donated_id);
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// Returns the ids of all functions in |context| in a topological order in
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// relation to the call graph of |context|, which is assumed to be recursion-
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// free.
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static std::vector<uint32_t> GetFunctionsInCallGraphTopologicalOrder(
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opt::IRContext* context);
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// Functions that supply SPIR-V modules
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std::vector<fuzzerutil::ModuleSupplier> donor_suppliers_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_FUZZER_PASS_DONATE_MODULES_H_
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