void Compilation::generate_exception_handler_table() {
// Generate an ExceptionHandlerTable from the exception handler
// information accumulated during the compilation.
ExceptionInfoList* info_list = exception_info_list();
if (info_list->length() == 0) {
return;
}
// allocate some arrays for use by the collection code.
const int num_handlers = 5;
GrowableArray<intptr_t>* bcis = new GrowableArray<intptr_t>(num_handlers);
GrowableArray<intptr_t>* scope_depths = new GrowableArray<intptr_t>(num_handlers);
GrowableArray<intptr_t>* pcos = new GrowableArray<intptr_t>(num_handlers);
for (int i = 0; i < info_list->length(); i++) {
ExceptionInfo* info = info_list->at(i);
XHandlers* handlers = info->exception_handlers();
// empty the arrays
bcis->trunc_to(0);
scope_depths->trunc_to(0);
pcos->trunc_to(0);
for (int i = 0; i < handlers->length(); i++) {
XHandler* handler = handlers->handler_at(i);
assert(handler->entry_pco() != -1, "must have been generated");
int e = bcis->find(handler->handler_bci());
if (e >= 0 && scope_depths->at(e) == handler->scope_count()) {
// two different handlers are declared to dispatch to the same
// catch bci. During parsing we created edges for each
// handler but we really only need one. The exception handler
// table will also get unhappy if we try to declare both since
// it's nonsensical. Just skip this handler.
continue;
}
bcis->append(handler->handler_bci());
if (handler->handler_bci() == -1) {
// insert a wildcard handler at scope depth 0 so that the
// exception lookup logic with find it.
scope_depths->append(0);
} else {
scope_depths->append(handler->scope_count());
}
pcos->append(handler->entry_pco());
// stop processing once we hit a catch any
if (handler->is_catch_all()) {
assert(i == handlers->length() - 1, "catch all must be last handler");
}
}
exception_handler_table()->add_subtable(info->pco(), bcis, scope_depths, pcos);
}
}
void LIR_Assembler::emit_exception_entries(ExceptionInfoList* info_list) {
for (int i = 0; i < info_list->length(); i++) {
XHandlers* handlers = info_list->at(i)->exception_handlers();
for (int j = 0; j < handlers->length(); j++) {
XHandler* handler = handlers->handler_at(j);
assert(handler->lir_op_id() != -1, "handler not processed by LinearScan");
assert(handler->entry_code() == NULL ||
handler->entry_code()->instructions_list()->last()->code() == lir_branch ||
handler->entry_code()->instructions_list()->last()->code() == lir_delay_slot, "last operation must be branch");
if (handler->entry_pco() == -1) {
// entry code not emitted yet
if (handler->entry_code() != NULL && handler->entry_code()->instructions_list()->length() > 1) {
handler->set_entry_pco(code_offset());
if (CommentedAssembly) {
_masm->block_comment("Exception adapter block");
}
emit_lir_list(handler->entry_code());
} else {
handler->set_entry_pco(handler->entry_block()->exception_handler_pco());
}
assert(handler->entry_pco() != -1, "must be set now");
}
}
}
}
void pollForEvents (EventsArg *eventsArg) {
Resources *resources = eventsArg->resources_;
XHandler *xhandler = eventsArg->xhandler_;
pthread_mutex_t *mutex = eventsArg->mutex_;
Display *display = xhandler->display();
Window window = xhandler->window();
XSelectInput(display, window,
KeyPressMask |
KeyReleaseMask |
StructureNotifyMask);
Helicopter &helicopter = resources->heli_;
KeySym key;
XWindowAttributes attr;
XEvent event;
while (true) {
XNextEvent(display, &event);
if (pthread_mutex_lock(mutex) == -1) {
error("cannot lock mutex in control thread");
}
switch (event.type) {
case ConfigureNotify:
if (event.xconfigure.width != attr.width ||
event.xconfigure.height != attr.height) {
XGetWindowAttributes(display, window, &attr);
attr::DrawableBase::ScaleX = (double)PLANE_W / (double)attr.width;
attr::DrawableBase::ScaleY = (double)PLANE_H / (double)attr.height;
std::cout << attr::DrawableBase::ScaleX << std::endl;
std::cout << attr::DrawableBase::ScaleY << std::endl;
std::cout << "w: " << attr.width << std::endl;
std::cout << "h: " << attr.height << std::endl;
xhandler->updateAttr(&attr);
}
break;
case KeyPress:
XLookupString(&event.xkey, NULL, 0, &key, NULL);
switch (key) {
case XK_f:
if (xhandler->showCredit()) {
xhandler->setShowCredit(false);
}
else {
xhandler->setShowCredit(true);
}
break;
case XK_Up:
helicopter.up_ = true;
break;
case XK_Down:
helicopter.down_ = true;
break;
case XK_Left:
helicopter.left_ = true;
break;
case XK_Right:
helicopter.right_ = true;
break;
case XK_a:
Tower::incSpeed();
Missile::incSpeed();
break;
case XK_z:
Tower::decSpeed();
Missile::decSpeed();
break;
/*
case XK_q: // slow down scroll speed
Tower::incDelay(1);
Missile::incDelay(1);
Bomb::incDelay(2);
break;
case XK_w: // speed up scroll speed
Tower::decDelay(1);
Missile::decDelay(1);
Bomb::decDelay(2);
break;
*/
case XK_d:
if (helicopter.right_) {
int x = helicopter.x() + helicopter.w() * 0.8;
int y = helicopter.y() + helicopter.h() * 0.8;
resources->bombs_.addBomb(x,
y,
Bomb::FORWARD);
}
else if (helicopter.left_) {
int x = helicopter.x() + helicopter.w() * 0.8;
int y = helicopter.y() + helicopter.h() * 0.8;
resources->bombs_.addBomb(x,
y,
Bomb::BACKWARD);
}
else {
int x = helicopter.x() + helicopter.w() * 0.8;
int y = helicopter.y() + helicopter.h() * 0.8;
resources->bombs_.addBomb(x,
y,
Bomb::NUL);
}
/*
if (helicopter.movement() == Helicopter::LEFT) {
resources->bombs_.push_back(
Bomb(
helicopter.x() + Helicopter::w(),
helicopter.y() + Helicopter::h(),
false));
}
else {
resources->bombs_.push_back(
Bomb(
helicopter.x() + Helicopter::w(),
helicopter.y() + Helicopter::h(),
true));
}
*/
break;
default:
break;
}
break;
case KeyRelease:
XLookupString(&event.xkey, NULL, 0, &key, NULL);
switch (key) {
case XK_Up:
helicopter.up_ = false;
helicopter.delayUp_ = 30;
break;
case XK_Down:
helicopter.down_ = false;
helicopter.delayDown_ = 30;
break;
case XK_Left:
helicopter.left_ = false;
helicopter.delayLeft_ = 30;
break;
case XK_Right:
helicopter.right_ = false;
helicopter.delayRight_ = 30;
break;
default:
break;
}
break;
default:
break;
}
if (pthread_mutex_unlock(mutex) == -1) {
error("cannot unlock mutex in control thread");
}
}
}
void LIR_Assembler::emit_exception_entries(ExceptionInfoList* info_list) {
// tell these to the MacroAssembler
for (int i = 0; i < info_list->length(); i++) {
XHandlers* handlers = info_list->at(i)->exception_handlers();
for (int j = 0; j < handlers->length(); j++) {
XHandler* handler = handlers->handler_at(j);
assert(handler->lir_op_id() != -1, "handler not processed by LinearScan");
assert(handler->entry_code() == NULL ||
handler->entry_code()->instructions_list()->last()->code()==lir_branch,"last operation must be branch");
if (!handler->entry_lbl()) {
// entry code not emitted yet
if (handler->entry_code() != NULL && handler->entry_code()->instructions_list()->length() > 1) {
handler->set_entry_lbl(new Label(_masm)); // bind label here
_masm->block_comment("Exception adapter block");
emit_lir_list(handler->entry_code());
} else {
handler->set_entry_lbl(handler->entry_block()->label());
}
}
}
}
}
