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This commit is contained in:
Bhargava Shastry 2019-12-23 14:53:56 +01:00
parent ec56c785c1
commit e2efcf222c
2 changed files with 83 additions and 3 deletions
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75
test/tools/ossfuzz/protomutators/YulProtoMutator.cpp
View File

@ -51,7 +51,6 @@ static YulProtoMutator addBreak(
#endif #endif
BreakStmt* breakStmt = new BreakStmt(); BreakStmt* breakStmt = new BreakStmt();
Statement* statement = forStmt->mutable_for_body()->add_statements(); Statement* statement = forStmt->mutable_for_body()->add_statements();
statement->clear_stmt_oneof();
statement->set_allocated_breakstmt(breakStmt); statement->set_allocated_breakstmt(breakStmt);
#ifdef DEBUG #ifdef DEBUG
// std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl; // std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
@ -77,7 +76,6 @@ static YulProtoMutator addContinue(
#endif #endif
ContinueStmt* contStmt = new ContinueStmt(); ContinueStmt* contStmt = new ContinueStmt();
Statement* statement = forStmt->mutable_for_body()->add_statements(); Statement* statement = forStmt->mutable_for_body()->add_statements();
statement->clear_stmt_oneof();
statement->set_allocated_contstmt(contStmt); statement->set_allocated_contstmt(contStmt);
#ifdef DEBUG #ifdef DEBUG
// std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl; // std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
@ -148,3 +146,76 @@ static YulProtoMutator invertForCondition(
} }
} }
); );
/// Make for loop condition a function call that returns a single value
static YulProtoMutator funcCallForCondition(
ForStmt::descriptor(),
[](google::protobuf::Message* _message, unsigned int _seed)
{
ForStmt* forStmt = static_cast<ForStmt*>(_message);
if (_seed % YulProtoMutator::s_mediumIP == 0)
{
if (forStmt->has_for_cond())
{
#ifdef DEBUG
// std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
std::cout << "YULMUTATOR: Function call in for condition" << std::endl;
#endif
forStmt->release_for_cond();
FunctionCall *functionCall = new FunctionCall();
functionCall->set_ret(FunctionCall::SINGLE);
functionCall->set_func_index(0);
Expression *forCondExpr = new Expression();
forCondExpr->set_allocated_func_expr(functionCall);
forStmt->set_allocated_for_cond(forCondExpr);
#ifdef DEBUG
// std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
#endif
}
}
}
);
/// Define an identity function f(x) = x
static YulProtoMutator identityFunction(
Block::descriptor(),
[](google::protobuf::Message* _message, unsigned int _seed)
{
if (_seed % YulProtoMutator::s_mediumIP == 0)
{
#ifdef DEBUG
// std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
std::cout << "YULMUTATOR: Identity function" << std::endl;
#endif
Block* blockStmt = static_cast<Block*>(_message);
FunctionDef* functionDef = new FunctionDef();
functionDef->set_num_input_params(1);
functionDef->set_num_output_params(1);
Block* functionBlock = new Block();
AssignmentStatement* assignmentStatement = new AssignmentStatement();
VarRef* varRef = new VarRef();
varRef->set_varnum(1);
assignmentStatement->set_allocated_ref_id(varRef);
Expression* rhs = new Expression();
VarRef* rhsRef = new VarRef();
rhsRef->set_varnum(0);
rhs->set_allocated_varref(rhsRef);
assignmentStatement->set_allocated_expr(rhs);
Statement *stmt = functionBlock->add_statements();
stmt->set_allocated_assignment(assignmentStatement);
functionDef->set_allocated_block(functionBlock);
Statement *funcdefStmt = blockStmt->add_statements();
funcdefStmt->set_allocated_funcdef(functionDef);
#ifdef DEBUG
// std::cout << protobuf_mutator::SaveMessageAsText(*_message) << std::endl;
#endif
}
}
);
Literal* YulProtoMutator::intLiteral(unsigned _value)
{
Literal *lit = new Literal();
lit->set_intval(_value);
return lit;
}

9
test/tools/ossfuzz/protomutators/YulProtoMutator.h
View File

@ -20,6 +20,15 @@ struct YulProtoMutator
protobuf_mutator::libfuzzer::RegisterPostProcessor(_desc, _callback); protobuf_mutator::libfuzzer::RegisterPostProcessor(_desc, _callback);
} }
/// Return an integer literal of the given value.
/// @param _value: Value of the integer literal
static Literal* intLiteral(unsigned _value);
/// Return a variable reference
/// @param _index: Index of a variable in scope, 0 being the first
/// variable in scope.
static VarRef* varref(unsigned _index);
static constexpr unsigned s_lowIP = 41; static constexpr unsigned s_lowIP = 41;
static constexpr unsigned s_mediumIP = 29; static constexpr unsigned s_mediumIP = 29;
static constexpr unsigned s_highIP = 17; static constexpr unsigned s_highIP = 17;