int MethodComparator::check_stack_and_locals_size(methodOop old_method, methodOop new_method) {
if (old_method->max_stack() != new_method->max_stack()) {
return 1;
} else if (old_method->max_locals() != new_method->max_locals()) {
return 2;
} else if (old_method->size_of_parameters() != new_method->size_of_parameters()) {
return 3;
} else return 0;
}
void BytecodeInterpreter::layout_interpreterState(interpreterState istate,
frame* caller,
frame* current,
methodOop method,
intptr_t* locals,
intptr_t* stack,
intptr_t* stack_base,
intptr_t* monitor_base,
intptr_t* frame_bottom,
bool is_top_frame) {
istate->set_locals(locals);
istate->set_method(method);
istate->set_self_link(istate);
istate->set_prev_link(NULL);
// thread will be set by a hacky repurposing of frame::patch_pc()
// bcp will be set by vframeArrayElement::unpack_on_stack()
istate->set_constants(method->constants()->cache());
istate->set_msg(BytecodeInterpreter::method_resume);
istate->set_bcp_advance(0);
istate->set_oop_temp(NULL);
istate->set_mdx(NULL);
if (caller->is_interpreted_frame()) {
interpreterState prev = caller->get_interpreterState();
prev->set_callee(method);
if (*prev->bcp() == Bytecodes::_invokeinterface)
prev->set_bcp_advance(5);
else
prev->set_bcp_advance(3);
}
istate->set_callee(NULL);
istate->set_monitor_base((BasicObjectLock *) monitor_base);
istate->set_stack_base(stack_base);
istate->set_stack(stack);
istate->set_stack_limit(stack_base - method->max_stack() - 1);
}
// for hashing into the table
static int hash(methodOop method) {
// The point here is to try to make something fairly unique
// out of the fields we can read without grabbing any locks
// since the method may be locked when we need the hash.
return (
method->code_size() ^
method->max_stack() ^
method->max_locals() ^
method->size_of_parameters());
}
int AbstractInterpreter::layout_activation(methodOop method,
int tempcount,
int popframe_extra_args,
int moncount,
int caller_actual_parameters,
int callee_param_count,
int callee_locals,
frame* caller,
frame* interpreter_frame,
bool is_top_frame,
bool is_bottom_frame) {
assert(popframe_extra_args == 0, "what to do?");
assert(!is_top_frame || (!callee_locals && !callee_param_count),
"top frame should have no caller");
// This code must exactly match what InterpreterFrame::build
// does (the full InterpreterFrame::build, that is, not the
// one that creates empty frames for the deoptimizer).
//
// If interpreter_frame is not NULL then it will be filled in.
// It's size is determined by a previous call to this method,
// so it should be correct.
//
// Note that tempcount is the current size of the expression
// stack. For top most frames we will allocate a full sized
// expression stack and not the trimmed version that non-top
// frames have.
int header_words = InterpreterFrame::header_words;
int monitor_words = moncount * frame::interpreter_frame_monitor_size();
int stack_words = is_top_frame ? method->max_stack() : tempcount;
int callee_extra_locals = callee_locals - callee_param_count;
if (interpreter_frame) {
intptr_t *locals = interpreter_frame->fp() + method->max_locals();
interpreterState istate = interpreter_frame->get_interpreterState();
intptr_t *monitor_base = (intptr_t*) istate;
intptr_t *stack_base = monitor_base - monitor_words;
intptr_t *stack = stack_base - tempcount - 1;
BytecodeInterpreter::layout_interpreterState(istate,
caller,
NULL,
method,
locals,
stack,
stack_base,
monitor_base,
NULL,
is_top_frame);
}
return header_words + monitor_words + stack_words + callee_extra_locals;
}
int AbstractInterpreter::size_top_interpreter_activation(methodOop method)
{
#ifdef PPC
StackFrame frame;
int call_stub_frame = round_to(
StubRoutines::call_stub_base_size() +
method->max_locals() * wordSize, StackAlignmentInBytes);
int interpreter_frame = round_to(
frame.unaligned_size() +
slop_factor +
method->max_stack() * wordSize +
(method->is_synchronized() ?
frame::interpreter_frame_monitor_size() * wordSize : 0) +
sizeof(BytecodeInterpreter), StackAlignmentInBytes);
return (call_stub_frame + interpreter_frame) / wordSize;
#else
Unimplemented();
#endif // PPC
}