| // Copyright 2022 The Dawn & Tint Authors |
| // |
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| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
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| // |
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| |
| #include "src/tint/fuzzers/tint_ast_fuzzer/mutation_finders/change_binary_operators.h" |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "src/tint/fuzzers/tint_ast_fuzzer/mutations/change_binary_operator.h" |
| #include "src/tint/lang/wgsl/ast/binary_expression.h" |
| |
| namespace tint::fuzzers::ast_fuzzer { |
| |
| MutationList MutationFinderChangeBinaryOperators::FindMutations( |
| const tint::Program& program, |
| NodeIdMap* node_id_map, |
| ProbabilityContext* probability_context) const { |
| MutationList result; |
| |
| // Go through each binary expression in the AST and add a mutation that |
| // replaces its operator with some other type-compatible operator. |
| |
| const std::vector<core::BinaryOp> all_binary_operators = {core::BinaryOp::kAnd, |
| core::BinaryOp::kOr, |
| core::BinaryOp::kXor, |
| core::BinaryOp::kLogicalAnd, |
| core::BinaryOp::kLogicalOr, |
| core::BinaryOp::kEqual, |
| core::BinaryOp::kNotEqual, |
| core::BinaryOp::kLessThan, |
| core::BinaryOp::kGreaterThan, |
| core::BinaryOp::kLessThanEqual, |
| core::BinaryOp::kGreaterThanEqual, |
| core::BinaryOp::kShiftLeft, |
| core::BinaryOp::kShiftRight, |
| core::BinaryOp::kAdd, |
| core::BinaryOp::kSubtract, |
| core::BinaryOp::kMultiply, |
| core::BinaryOp::kDivide, |
| core::BinaryOp::kModulo}; |
| |
| for (const auto* node : program.ASTNodes().Objects()) { |
| const auto* binary_expr = As<ast::BinaryExpression>(node); |
| if (!binary_expr) { |
| continue; |
| } |
| |
| // Get vector of all operators this could be replaced with. |
| std::vector<core::BinaryOp> allowed_replacements; |
| for (auto candidate_op : all_binary_operators) { |
| if (MutationChangeBinaryOperator::CanReplaceBinaryOperator(program, *binary_expr, |
| candidate_op)) { |
| allowed_replacements.push_back(candidate_op); |
| } |
| } |
| |
| if (!allowed_replacements.empty()) { |
| // Choose an available replacement operator at random. |
| const core::BinaryOp replacement = |
| allowed_replacements[probability_context->GetRandomIndex(allowed_replacements)]; |
| // Add a mutation according to the chosen replacement. |
| result.push_back(std::make_unique<MutationChangeBinaryOperator>( |
| node_id_map->GetId(binary_expr), replacement)); |
| } |
| } |
| |
| return result; |
| } |
| |
| uint32_t MutationFinderChangeBinaryOperators::GetChanceOfApplyingMutation( |
| ProbabilityContext* probability_context) const { |
| return probability_context->GetChanceOfChangingBinaryOperators(); |
| } |
| |
| } // namespace tint::fuzzers::ast_fuzzer |