bool java_entry_point(
symbol_tablet &symbol_table,
const irep_idt &main_class,
message_handlert &message_handler)
{
// check if the entry point is already there
if(symbol_table.symbols.find(goto_functionst::entry_point())!=
symbol_table.symbols.end())
return false; // silently ignore
messaget message(message_handler);
symbolt symbol; // main function symbol
// find main symbol
if(config.main!="")
{
// Add java:: prefix
std::string main_identifier="java::"+config.main;
symbol_tablet::symbolst::const_iterator s_it;
// Does it have a type signature? (':' suffix)
if(config.main.rfind(':')==std::string::npos)
{
std::string prefix=main_identifier+':';
std::set<irep_idt> matches;
for(const auto & s : symbol_table.symbols)
if(has_prefix(id2string(s.first), prefix) &&
s.second.type.id()==ID_code)
matches.insert(s.first);
if(matches.empty())
{
message.error() << "main symbol `" << config.main
<< "' not found" << messaget::eom;
return true;
}
else if(matches.size()==1)
{
s_it=symbol_table.symbols.find(*matches.begin());
assert(s_it!=symbol_table.symbols.end());
}
else
{
message.error() << "main symbol `" << config.main
<< "' is ambiguous:\n";
for(const auto & s : matches)
message.error() << " " << s << '\n';
message.error() << messaget::eom;
return true;
}
}
else
{
// just look it up
s_it=symbol_table.symbols.find(main_identifier);
if(s_it==symbol_table.symbols.end())
{
message.error() << "main symbol `" << config.main
<< "' not found" << messaget::eom;
return true;
}
}
// function symbol
symbol=s_it->second;
if(symbol.type.id()!=ID_code)
{
message.error() << "main symbol `" << config.main
<< "' not a function" << messaget::eom;
return true;
}
// check if it has a body
if(symbol.value.is_nil())
{
message.error() << "main method `" << main_class
<< "' has no body" << messaget::eom;
return true;
}
}
else
{
// no function given, we look for the main class
assert(config.main=="");
// are we given a main class?
if(main_class.empty())
return false; // silently ignore
std::string entry_method=
id2string(main_class)+".main";
std::string prefix="java::"+entry_method+":";
// look it up
std::set<irep_idt> matches;
for(symbol_tablet::symbolst::const_iterator
s_it=symbol_table.symbols.begin();
s_it!=symbol_table.symbols.end();
s_it++)
{
if(s_it->second.type.id()==ID_code &&
has_prefix(id2string(s_it->first), prefix))
matches.insert(s_it->first);
}
if(matches.empty())
{
// Not found, silently ignore
return false;
}
if(matches.size()>=2)
{
message.error() << "main method in `" << main_class
<< "' is ambiguous" << messaget::eom;
return true; // give up with error, no main
}
// function symbol
symbol=symbol_table.symbols.find(*matches.begin())->second;
// check if it has a body
if(symbol.value.is_nil())
{
message.error() << "main method `" << main_class
<< "' has no body" << messaget::eom;
return true; // give up with error
}
}
assert(!symbol.value.is_nil());
assert(symbol.type.id()==ID_code);
const code_typet &code_type=to_code_type(symbol.type);
create_initialize(symbol_table);
if(java_static_lifetime_init(symbol_table, symbol.location, message_handler))
return true;
code_blockt init_code;
// build call to initialization function
{
symbol_tablet::symbolst::iterator init_it=
symbol_table.symbols.find(INITIALIZE);
if(init_it==symbol_table.symbols.end())
{
message.error() << "failed to find " INITIALIZE " symbol"
<< messaget::eom;
return true; // give up with error
}
code_function_callt call_init;
call_init.lhs().make_nil();
call_init.add_source_location()=symbol.location;
call_init.function()=init_it->second.symbol_expr();
init_code.move_to_operands(call_init);
}
// build call to the main method
code_function_callt call_main;
call_main.add_source_location()=symbol.location;
call_main.function()=symbol.symbol_expr();
const code_typet::parameterst ¶meters=
code_type.parameters();
exprt::operandst main_arguments;
main_arguments.resize(parameters.size());
for(std::size_t param_number=0;
param_number<parameters.size();
param_number++)
{
bool is_this=param_number==0 &&
parameters[param_number].get_this();
bool allow_null=config.main!="" && !is_this;
main_arguments[param_number]=
object_factory(parameters[param_number].type(),
init_code, allow_null, symbol_table);
}
call_main.arguments()=main_arguments;
init_code.move_to_operands(call_main);
// add "main"
symbolt new_symbol;
code_typet main_type;
main_type.return_type()=empty_typet();
new_symbol.name=goto_functionst::entry_point();
new_symbol.type.swap(main_type);
new_symbol.value.swap(init_code);
new_symbol.mode=ID_java;
if(symbol_table.move(new_symbol))
{
message.error() << "failed to move main symbol" << messaget::eom;
return true;
}
return false;
}
bool java_entry_point(
symbol_tablet &symbol_table,
const irep_idt &main_class,
message_handlert &message_handler,
bool assume_init_pointers_not_null,
size_t max_nondet_array_length)
{
// check if the entry point is already there
if(symbol_table.symbols.find(goto_functionst::entry_point())!=
symbol_table.symbols.end())
return false; // silently ignore
messaget message(message_handler);
main_function_resultt res=
get_main_symbol(symbol_table, main_class, message_handler);
if(res.stop_convert)
return res.stop_convert;
symbolt symbol=res.main_function;
assert(!symbol.value.is_nil());
assert(symbol.type.id()==ID_code);
create_initialize(symbol_table);
if(java_static_lifetime_init(
symbol_table,
symbol.location,
message_handler,
assume_init_pointers_not_null,
max_nondet_array_length))
return true;
code_blockt init_code;
// build call to initialization function
{
symbol_tablet::symbolst::iterator init_it=
symbol_table.symbols.find(INITIALIZE);
if(init_it==symbol_table.symbols.end())
{
message.error() << "failed to find " INITIALIZE " symbol"
<< messaget::eom;
return true; // give up with error
}
code_function_callt call_init;
call_init.lhs().make_nil();
call_init.add_source_location()=symbol.location;
call_init.function()=init_it->second.symbol_expr();
init_code.move_to_operands(call_init);
}
// build call to the main method
code_function_callt call_main;
source_locationt loc=symbol.location;
loc.set_function(symbol.name);
source_locationt &dloc=loc;
call_main.add_source_location()=dloc;
call_main.function()=symbol.symbol_expr();
call_main.function().add_source_location()=dloc;
if(to_code_type(symbol.type).return_type()!=empty_typet())
{
auxiliary_symbolt return_symbol;
return_symbol.mode=ID_C;
return_symbol.is_static_lifetime=false;
return_symbol.name="return'";
return_symbol.base_name="return";
return_symbol.type=to_code_type(symbol.type).return_type();
symbol_table.add(return_symbol);
call_main.lhs()=return_symbol.symbol_expr();
}
exprt::operandst main_arguments=
java_build_arguments(
symbol,
init_code,
symbol_table,
assume_init_pointers_not_null,
max_nondet_array_length,
message_handler);
call_main.arguments()=main_arguments;
init_code.move_to_operands(call_main);
java_record_outputs(symbol, main_arguments, init_code, symbol_table);
// add "main"
symbolt new_symbol;
code_typet main_type;
main_type.return_type()=empty_typet();
new_symbol.name=goto_functionst::entry_point();
new_symbol.type.swap(main_type);
new_symbol.value.swap(init_code);
new_symbol.mode=ID_java;
if(symbol_table.move(new_symbol))
{
message.error() << "failed to move main symbol" << messaget::eom;
return true;
}
return false;
}