// TODO zPrepArgs needs to be updated so take care of
// boxing varargs
void zPrepArgs(ActRec* ar) {
// If you call a function with too few params, zend_parse_parameters will
// reject it, but we don't want this function boxing random slots from the
// stack
int32_t numArgs = std::min(ar->numArgs(), ar->m_func->numParams());
TypedValue* args = (TypedValue*)ar - 1;
for (int32_t i = 0; i < numArgs; ++i) {
TypedValue* arg = args-i;
zBoxAndProxy(arg);
}
}
void * ProxyArray::elementToData(TypedValue * tv) const {
if (!tv) {
return nullptr;
}
if (hasZvalValues()) {
zBoxAndProxy(tv);
return (void*)(&tv->m_data.pref);
} else {
always_assert(tv->m_type == KindOfResource);
ZendCustomElement * elt = dynamic_cast<ZendCustomElement*>(tv->m_data.pres);
always_assert(elt);
return elt->data();
}
}
zval* ZendExecutionStack::getArg(int i) {
auto& stack = getStack();
auto& entry = stack.m_stack.back();
switch (entry.mode) {
case ZendStackMode::HHVM_STACK: {
ActRec* ar = (ActRec*)entry.value;
const int numNonVaradic = ar->m_func->numNonVariadicParams();
TypedValue* arg;
if (i < numNonVaradic) {
arg = (TypedValue*)ar - i - 1;
} else if (i < ar->numArgs()) {
arg = ar->getExtraArg(i - numNonVaradic);
} else {
if (!stack.m_nullArg) {
stack.m_nullArg = RefData::Make(make_tv<KindOfNull>());
}
return stack.m_nullArg;
}
zBoxAndProxy(arg);
return arg->m_data.pref;
}
case ZendStackMode::SIDE_STACK: {
// Zend puts the number of args as the last thing on the stack
int numargs = uintptr_t(entry.value);
assert(numargs < 4096);
assert(i < numargs);
zval* zv =
(zval*) stack.m_stack[stack.m_stack.size() - 1 - numargs + i].value;
zv->assertValid();
return zv;
}
}
not_reached();
return nullptr;
}