static Array HHVM_FUNCTION(xdebug_get_declared_vars) {
if (RuntimeOption::RepoAuthoritative) {
raise_error("xdebug_get_declared_vars unsupported in RepoAuthoritative "
"mode");
}
// Grab the callee function
VMRegAnchor _; // Ensure consistent state for vmfp
auto func = g_context->getPrevFunc(vmfp());
if (!func) {
return Array::Create();
}
// Add each named local to the returned array. Note that since this function
// is supposed to return all _declared_ variables in scope, which includes
// variables that have been unset.
auto const numNames = func->numNamedLocals();
PackedArrayInit vars(numNames);
for (Id i = 0; i < numNames; ++i) {
assert(func->lookupVarId(func->localVarName(i)) == i);
String varname(const_cast<StringData*>(func->localVarName(i)));
// Skip the internal closure "0Closure" variable
if (!s_closure_varname.equal(varname)) {
vars.append(varname);
}
}
return vars.toArray();
}
NameValueTable::NameValueTable(ActRec* fp)
: m_fp(fp)
, m_table(nullptr)
, m_tabMask(0)
, m_elms(0)
{
assert(m_fp);
const auto func = m_fp->m_func;
const Id numNames = func->numNamedLocals();
/**
* Reserve space for all named locals plus one additional variable
* to avoid reallocations if one extra dynamic variable is used.
*/
reserve(numNames + 1);
for (Id i = 0; i < numNames; ++i) {
assert(func->lookupVarId(func->localVarName(i)) == i);
auto elm = insert(func->localVarName(i));
assert(elm && elm->m_tv.m_type == KindOfInvalid);
elm->m_tv.m_type = KindOfNamedLocal;
elm->m_tv.m_data.num = i;
}
}
void NameValueTable::detach(ActRec* fp) {
assert(m_fp == fp);
m_fp = nullptr;
const auto func = fp->m_func;
const Id numNames = func->numNamedLocals();
TypedValue* loc = frame_local(fp, 0);
for (Id i = 0; i < numNames; ++i, --loc) {
assert(func->lookupVarId(func->localVarName(i)) == i);
auto elm = findElm(func->localVarName(i));
assert(elm && elm->m_tv.m_type == KindOfNamedLocal);
tvCopy(*loc, elm->m_tv);
tvDebugTrash(loc);
}
}
void NameValueTable::attach(ActRec* fp) {
assert(m_fp == nullptr);
m_fp = fp;
const auto func = fp->m_func;
const Id numNames = func->numNamedLocals();
TypedValue* loc = frame_local(fp, 0);
for (Id i = 0; i < numNames; ++i, --loc) {
assert(func->lookupVarId(func->localVarName(i)) == i);
auto elm = insert(func->localVarName(i));
assert(elm);
if (elm->m_tv.m_type != KindOfInvalid) {
assert(elm->m_tv.m_type != KindOfNamedLocal);
tvCopy(elm->m_tv, *loc);
}
elm->m_tv.m_type = KindOfNamedLocal;
elm->m_tv.m_data.num = i;
}
}