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#include "node_shadow_realm.h"
#include "env-inl.h"
#include "node_errors.h"
namespace node {
namespace shadow_realm {
using v8::Context;
using v8::HandleScope;
using v8::Local;
using v8::MaybeLocal;
using v8::Value;
using TryCatchScope = node::errors::TryCatchScope;
// static
ShadowRealm* ShadowRealm::New(Environment* env) {
ShadowRealm* realm = new ShadowRealm(env);
env->AssignToContext(realm->context(), realm, ContextInfo(""));
// We do not expect the realm bootstrapping to throw any
// exceptions. If it does, exit the current Node.js instance.
TryCatchScope try_catch(env, TryCatchScope::CatchMode::kFatal);
if (realm->RunBootstrapping().IsEmpty()) {
delete realm;
return nullptr;
}
return realm;
}
// static
MaybeLocal<Context> HostCreateShadowRealmContextCallback(
Local<Context> initiator_context) {
Environment* env = Environment::GetCurrent(initiator_context);
ShadowRealm* realm = ShadowRealm::New(env);
if (realm != nullptr) {
return realm->context();
}
return MaybeLocal<Context>();
}
// static
void ShadowRealm::WeakCallback(const v8::WeakCallbackInfo<ShadowRealm>& data) {
ShadowRealm* realm = data.GetParameter();
delete realm;
}
ShadowRealm::ShadowRealm(Environment* env)
: Realm(env, NewContext(env->isolate()), kShadowRealm) {
env->TrackShadowRealm(this);
context_.SetWeak(this, WeakCallback, v8::WeakCallbackType::kParameter);
CreateProperties();
}
ShadowRealm::~ShadowRealm() {
while (HasCleanupHooks()) {
RunCleanup();
}
if (env_ != nullptr) {
env_->UntrackShadowRealm(this);
}
}
void ShadowRealm::OnEnvironmentDestruct() {
CHECK_NOT_NULL(env_);
env_ = nullptr; // This means that the shadow realm has out-lived the
// environment.
}
v8::Local<v8::Context> ShadowRealm::context() const {
Local<Context> ctx = PersistentToLocal::Default(isolate_, context_);
DCHECK(!ctx.IsEmpty());
return ctx;
}
// V8 can not infer reference cycles between global persistent handles, e.g.
// the Realm's Context handle and the per-realm function handles.
// Attach the per-realm strong persistent values' lifetime to the context's
// global object to avoid the strong global references to the per-realm objects
// keep the context alive indefinitely.
#define V(PropertyName, TypeName) \
v8::Local<TypeName> ShadowRealm::PropertyName() const { \
return PersistentToLocal::Default(isolate_, PropertyName##_); \
} \
void ShadowRealm::set_##PropertyName(v8::Local<TypeName> value) { \
HandleScope scope(isolate_); \
PropertyName##_.Reset(isolate_, value); \
v8::Local<v8::Context> ctx = context(); \
if (value.IsEmpty()) { \
ctx->Global() \
->SetPrivate(ctx, \
isolate_data()->per_realm_##PropertyName(), \
v8::Undefined(isolate_)) \
.ToChecked(); \
} else { \
PropertyName##_.SetWeak(); \
ctx->Global() \
->SetPrivate(ctx, isolate_data()->per_realm_##PropertyName(), value) \
.ToChecked(); \
} \
}
PER_REALM_STRONG_PERSISTENT_VALUES(V)
#undef V
v8::MaybeLocal<v8::Value> ShadowRealm::BootstrapRealm() {
HandleScope scope(isolate_);
// Skip "internal/bootstrap/node" as it installs node globals and per-isolate
// callbacks.
if (!env_->no_browser_globals()) {
if (ExecuteBootstrapper("internal/bootstrap/web/exposed-wildcard")
.IsEmpty()) {
return MaybeLocal<Value>();
}
}
return v8::True(isolate_);
}
} // namespace shadow_realm
} // namespace node
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