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Add remove mutations

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This commit is contained in:
Bhargava Shastry 2019-12-28 18:29:06 +01:00
parent 194fbeb5c2
commit 3324762c37
1 changed files with 104 additions and 1 deletions
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105
test/tools/ossfuzz/protomutators/YulProtoMutator.cpp
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@ -35,6 +35,38 @@ static YulProtoMutator invertIfCondition(
} }
); );
/// Remove inverted condition in if statement
static YulProtoMutator removeInvertedIfCondition(
IfStmt::descriptor(),
[](google::protobuf::Message* _message, unsigned int _seed)
{
IfStmt* ifStmt = static_cast<IfStmt*>(_message);
if (_seed % YulProtoMutator::s_mediumIP == 1)
{
if (ifStmt->has_cond() &&
ifStmt->cond().has_unop() &&
ifStmt->cond().unop().has_op() &&
ifStmt->cond().unop().op() == UnaryOp::NOT
)
{
#ifdef DEBUG
std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
std::cout << "YULMUTATOR: Remove If condition inverted" << std::endl;
#endif
Expression *oldCondition = ifStmt->release_cond();
UnaryOp *unop = oldCondition->release_unop();
Expression *conditionWithoutNot = unop->release_operand();
ifStmt->set_allocated_cond(conditionWithoutNot);
delete(oldCondition);
delete(unop);
#ifdef DEBUG
std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
#endif
}
}
}
);
/// Add break statement in body of a for-loop statement /// Add break statement in body of a for-loop statement
static YulProtoMutator addBreak( static YulProtoMutator addBreak(
ForStmt::descriptor(), ForStmt::descriptor(),
@ -60,7 +92,32 @@ static YulProtoMutator addBreak(
} }
); );
/// Add break statement in body of a for-loop statement /// Remove break statement in body of a for-loop statement
static YulProtoMutator removeBreak(
ForStmt::descriptor(),
[](google::protobuf::Message* _message, unsigned int _seed)
{
ForStmt* forStmt = static_cast<ForStmt*>(_message);
if (_seed % YulProtoMutator::s_mediumIP == 1)
{
if (forStmt->has_for_body())
{
#ifdef DEBUG
std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
std::cout << "YULMUTATOR: Remove Break" << std::endl;
#endif
for (auto &stmt: *forStmt->mutable_for_body()->mutable_statements())
if (stmt.has_breakstmt())
stmt.clear_breakstmt();
#ifdef DEBUG
std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
#endif
}
}
}
);
/// Add continue statement in body of a for-loop statement
static YulProtoMutator addContinue( static YulProtoMutator addContinue(
ForStmt::descriptor(), ForStmt::descriptor(),
[](google::protobuf::Message* _message, unsigned int _seed) [](google::protobuf::Message* _message, unsigned int _seed)
@ -85,6 +142,31 @@ static YulProtoMutator addContinue(
} }
); );
/// Remove continue statement in body of a for-loop statement
static YulProtoMutator removeContinue(
ForStmt::descriptor(),
[](google::protobuf::Message* _message, unsigned int _seed)
{
ForStmt* forStmt = static_cast<ForStmt*>(_message);
if (_seed % YulProtoMutator::s_mediumIP == 1)
{
if (forStmt->has_for_body())
{
#ifdef DEBUG
std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
std::cout << "YULMUTATOR: Remove Continue" << std::endl;
#endif
for (auto &stmt: *forStmt->mutable_for_body()->mutable_statements())
if (stmt.has_contstmt())
stmt.clear_contstmt();
#ifdef DEBUG
std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
#endif
}
}
}
);
/// Add declaration statement referencing mload(0) /// Add declaration statement referencing mload(0)
static YulProtoMutator addMloadZero( static YulProtoMutator addMloadZero(
VarDecl::descriptor(), VarDecl::descriptor(),
@ -234,6 +316,27 @@ static YulProtoMutator addLeave(
} }
); );
/// Remove leave statement from an existing function.
static YulProtoMutator removeLeave(
FunctionDef::descriptor(),
[](google::protobuf::Message* _message, unsigned int _seed)
{
if (_seed % YulProtoMutator::s_lowIP == 1) {
#ifdef DEBUG
std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
std::cout << "YULMUTATOR: Remove Leave in function" << std::endl;
#endif
FunctionDef *funcDef = static_cast<FunctionDef*>(_message);
for (auto &stmt: *funcDef->mutable_block()->mutable_statements())
if (stmt.has_leave())
stmt.clear_leave();
#ifdef DEBUG
std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
#endif
}
}
);
Literal* YulProtoMutator::intLiteral(unsigned _value) Literal* YulProtoMutator::intLiteral(unsigned _value)
{ {
Literal *lit = new Literal(); Literal *lit = new Literal();