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Merge pull request #12789 from ethereum/yulFuzzerCustomMutation

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Permit control flow mutations in global scope of a Yul program.
This commit is contained in:
Bhargava Shastry 2022-03-14 16:23:18 +01:00 committed by GitHub
commit e19c366532
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2 changed files with 21 additions and 0 deletions
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19
test/tools/ossfuzz/protomutators/YulProtoMutator.cpp
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@ -73,6 +73,7 @@ static addControlFlow<SwitchStmt> c4;
static addControlFlow<FunctionDef> c5; static addControlFlow<FunctionDef> c5;
static addControlFlow<CaseStmt> c6; static addControlFlow<CaseStmt> c6;
static addControlFlow<Code> c7; static addControlFlow<Code> c7;
static addControlFlow<Program> c8;
Literal* YPM::intLiteral(unsigned _value) Literal* YPM::intLiteral(unsigned _value)
{ {
@ -261,6 +262,24 @@ Block* YPM::basicBlock(T* _msg)
return _msg->mutable_case_block(); return _msg->mutable_case_block();
else if constexpr (std::is_same_v<T, Code>) else if constexpr (std::is_same_v<T, Code>)
return _msg->mutable_block(); return _msg->mutable_block();
else if constexpr (std::is_same_v<T, Program>)
return globalBlock(_msg);
else else
static_assert(AlwaysFalse<T>::value, "Yul proto mutator: non-exhaustive visitor."); static_assert(AlwaysFalse<T>::value, "Yul proto mutator: non-exhaustive visitor.");
} }
Block* YPM::globalBlock(Program* _program)
{
switch (_program->program_oneof_case())
{
case Program::kBlock:
return _program->mutable_block();
case Program::kObj:
return _program->mutable_obj()->mutable_code()->mutable_block();
case Program::PROGRAM_ONEOF_NOT_SET:
{
_program->set_allocated_block(new Block());
return _program->mutable_block();
}
}
}

2
test/tools/ossfuzz/protomutators/YulProtoMutator.h
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@ -103,5 +103,7 @@ struct YulProtoMutator
/// Obtain a basic block in a for stmt uniformly /// Obtain a basic block in a for stmt uniformly
/// at random /// at random
static Block* randomBlock(ForStmt* _msg); static Block* randomBlock(ForStmt* _msg);
/// Obtain a basic block in global scope.
static Block* globalBlock(Program* _program);
}; };
} }