bool RenamedFuncDict::rename(const StringData* old, const StringData* n3w) {
assert(isFunctionRenameable(old) ||
isFunctionRenameable(n3w));
NamedEntity *oldNe = const_cast<NamedEntity *>(Unit::GetNamedEntity(old));
NamedEntity *newNe = const_cast<NamedEntity *>(Unit::GetNamedEntity(n3w));
Func* func = Unit::lookupFunc(oldNe);
if (!func) {
// It's the caller's responsibility to ensure that the old function
// exists.
not_reached();
}
if (!(func->attrs() & AttrDynamicInvoke)) {
// When EvalJitEnableRenameFunction is false, the translator may wire
// non-DynamicInvoke Func*'s into the TC. Don't rename functions.
if (RuntimeOption::EvalJit && !RuntimeOption::EvalJitEnableRenameFunction) {
raise_error("You must explicitly enable fb_rename_function in the JIT "
"(-v Eval.JitEnableRenameFunction=true)");
}
}
Func *fnew = Unit::lookupFunc(newNe);
if (fnew && fnew != func) {
// To match hphpc, we silently ignore functions defined in user code that
// have the same name as a function defined in a separable extension
if (!fnew->isAllowOverride()) {
raise_error("Function already defined: %s", n3w->data());
} else {
return false;
}
}
oldNe->setCachedFunc(nullptr);
if (UNLIKELY(newNe->m_cachedFuncOffset == 0)) {
Transl::TargetCache::allocFixedFunction(newNe, false);
}
newNe->setCachedFunc(func);
if (RuntimeOption::EvalJit) {
Transl::TargetCache::invalidateForRename(old);
}
return true;
}
void rename_function(const String& old_name, const String& new_name) {
auto const old = old_name.get();
auto const n3w = new_name.get();
auto const oldNe = const_cast<NamedEntity*>(Unit::GetNamedEntity(old));
auto const newNe = const_cast<NamedEntity*>(Unit::GetNamedEntity(n3w));
Func* func = Unit::lookupFunc(oldNe);
if (!func) {
// It's the caller's responsibility to ensure that the old function
// exists.
not_reached();
}
if (!(func->attrs() & AttrDynamicInvoke)) {
// When EvalJitEnableRenameFunction is false, the translator may wire
// non-DynamicInvoke Func*'s into the TC. Don't rename functions.
if (RuntimeOption::EvalJit && !RuntimeOption::EvalJitEnableRenameFunction) {
raise_error("You must explicitly enable fb_rename_function in the JIT "
"(-v Eval.JitEnableRenameFunction=true)");
}
}
Func *fnew = Unit::lookupFunc(newNe);
if (fnew && fnew != func) {
// To match hphpc, we silently ignore functions defined in user code that
// have the same name as a function defined in a separable extension
if (!fnew->isAllowOverride()) {
raise_error("Function already defined: %s", n3w->data());
}
return;
}
oldNe->setCachedFunc(nullptr);
newNe->m_cachedFunc.bind();
newNe->setCachedFunc(func);
if (RuntimeOption::EvalJit) {
JIT::invalidateForRenameFunction(old);
}
}
