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https://github.com/KhronosGroup/SPIRV-Tools
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521223b70a
This change allows the generator to (optionally and at random) make the functions of a module "livesafe" during donation. This involves introducing a loop limiter variable to each function and gating the number of total loop iterations for the function using that variable. It also involves eliminating OpKill and OpUnreachable instructions (changing them to OpReturn/OpReturnValue), and clamping access chain indices so that they are always in-bounds.
94 lines
3.9 KiB
C++
94 lines
3.9 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. |make_livesafe| dictates whether the
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// functions of the donated module will be made livesafe (see
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// FactFunctionIsLivesafe).
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void DonateSingleModule(opt::IRContext* donor_ir_context, bool make_livesafe);
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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. The |make_livesafe| argument captures whether the functions in
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// the module are required to be made livesafe before being added to the
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// recipient.
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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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bool make_livesafe);
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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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