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https://github.com/KhronosGroup/SPIRV-Tools
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b8ab80843f
Adds to spirv-fuzz the option to shrink a sequence of transformations that lead to an interesting binary to be generated, to find a smaller sub-sequence of transformations that still lead to an interesting (but hopefully simpler) binary being generated. The notion of what counts as "interesting" comes from a user-provided script, the "interestingness function", similar to the way the spirv-reduce tool works. The shrinking process will give up after a maximum number of steps, which can be configured on the command line. Tests for the combination of fuzzing and shrinking are included, using a variety of interestingness functions.
45 lines
1.5 KiB
C++
45 lines
1.5 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/spirv_fuzzer_options.h"
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namespace {
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// The default maximum number of steps for the reducer to run before giving up.
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const uint32_t kDefaultStepLimit = 250;
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} // namespace
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spv_fuzzer_options_t::spv_fuzzer_options_t()
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: has_random_seed(false),
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random_seed(0),
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shrinker_step_limit(kDefaultStepLimit) {}
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SPIRV_TOOLS_EXPORT spv_fuzzer_options spvFuzzerOptionsCreate() {
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return new spv_fuzzer_options_t();
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}
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SPIRV_TOOLS_EXPORT void spvFuzzerOptionsDestroy(spv_fuzzer_options options) {
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delete options;
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}
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SPIRV_TOOLS_EXPORT void spvFuzzerOptionsSetRandomSeed(
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spv_fuzzer_options options, uint32_t seed) {
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options->has_random_seed = true;
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options->random_seed = seed;
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}
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SPIRV_TOOLS_EXPORT void spvFuzzerOptionsSetShrinkerStepLimit(
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spv_fuzzer_options options, uint32_t shrinker_step_limit) {
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options->shrinker_step_limit = shrinker_step_limit;
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}
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