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src: disallow JS execution inside FreeEnvironment #33874

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src: disallow JS execution inside FreeEnvironment #33874

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8 changes: 6 additions & 2 deletions src/api/environment.cc
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Expand Up @@ -27,6 +27,7 @@ using v8::Object;
using v8::ObjectTemplate;
using v8::Private;
using v8::PropertyDescriptor;
using v8::SealHandleScope;
using v8::String;
using v8::Value;

Expand Down Expand Up @@ -378,10 +379,13 @@ Environment* CreateEnvironment(
}

void FreeEnvironment(Environment* env) {
Isolate::DisallowJavascriptExecutionScope disallow_js(env->isolate(),
Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE);
{
// TODO(addaleax): This should maybe rather be in a SealHandleScope.
HandleScope handle_scope(env->isolate());
HandleScope handle_scope(env->isolate()); // For env->context().
Context::Scope context_scope(env->context());
SealHandleScope seal_handle_scope(env->isolate());

env->set_stopping(true);
env->stop_sub_worker_contexts();
env->RunCleanup();
Expand Down
4 changes: 0 additions & 4 deletions src/node_worker.cc
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Expand Up @@ -274,10 +274,6 @@ void Worker::Run() {
this->env_ = nullptr;
}

// TODO(addaleax): Try moving DisallowJavascriptExecutionScope into
// FreeEnvironment().
Isolate::DisallowJavascriptExecutionScope disallow_js(isolate_,
Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE);
env_.reset();
});

Expand Down
15 changes: 15 additions & 0 deletions test/addons/worker-addon/binding.cc
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Expand Up @@ -6,10 +6,13 @@
#include <uv.h>

using v8::Context;
using v8::Function;
using v8::HandleScope;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::Object;
using v8::String;
using v8::Value;

size_t count = 0;
Expand All @@ -31,6 +34,18 @@ void Dummy(void*) {

void Cleanup(void* str) {
printf("%s ", static_cast<const char*>(str));

// Check that calling into JS fails.
Isolate* isolate = Isolate::GetCurrent();
HandleScope handle_scope(isolate);
assert(isolate->InContext());
Local<Context> context = isolate->GetCurrentContext();
MaybeLocal<Value> call_result =
context->Global()->Get(
context, String::NewFromUtf8Literal(isolate, "Object"))
.ToLocalChecked().As<Function>()->Call(
context, v8::Null(isolate), 0, nullptr);
assert(call_result.IsEmpty());
}

void Initialize(Local<Object> exports,
Expand Down