Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

src: fix race on modpending by migrating it to a thread local #21611

Closed
wants to merge 2 commits into from
Closed

src: fix race on modpending by migrating it to a thread local #21611

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
7f2c8bf
src: fix race on modpending by migrating it to Environment
rpetrich Jun 30, 2018
da4632a
src: squash! fix naming
Jul 27, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 12 additions & 5 deletions src/node.cc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -185,7 +185,8 @@ static int v8_thread_pool_size = v8_default_thread_pool_size;
static bool prof_process = false;
static bool v8_is_profiling = false;
static bool node_is_initialized = false;
static node_module* modpending;
static uv_once_t init_modpending_once = UV_ONCE_INIT;
static uv_key_t thread_local_modpending;
static node_module* modlist_builtin;
static node_module* modlist_internal;
static node_module* modlist_linked;
Expand Down Expand Up @@ -1144,7 +1145,7 @@ extern "C" void node_module_register(void* m) {
mp->nm_link = modlist_linked;
modlist_linked = mp;
} else {
modpending = mp;
uv_key_set(&thread_local_modpending, mp);
}
}

Expand Down Expand Up @@ -1258,6 +1259,10 @@ inline napi_addon_register_func GetNapiInitializerCallback(DLib* dlib) {
reinterpret_cast<napi_addon_register_func>(dlib->GetSymbolAddress(name));
}

void InitModpendingOnce() {
CHECK_EQ(0, uv_key_create(&thread_local_modpending));
}

// DLOpen is process.dlopen(module, filename, flags).
// Used to load 'module.node' dynamically shared objects.
//
Expand All @@ -1268,7 +1273,8 @@ static void DLOpen(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
auto context = env->context();

CHECK_NULL(modpending);
uv_once(&init_modpending_once, InitModpendingOnce);
CHECK_NULL(uv_key_get(&thread_local_modpending));

if (args.Length() < 2) {
env->ThrowError("process.dlopen needs at least 2 arguments.");
Expand Down Expand Up @@ -1296,8 +1302,9 @@ static void DLOpen(const FunctionCallbackInfo<Value>& args) {
// Objects containing v14 or later modules will have registered themselves
// on the pending list. Activate all of them now. At present, only one
// module per object is supported.
node_module* const mp = modpending;
modpending = nullptr;
node_module* const mp = static_cast<node_module*>(
uv_key_get(&thread_local_modpending));
uv_key_set(&thread_local_modpending, nullptr);

if (!is_opened) {
Local<String> errmsg = OneByteString(env->isolate(), dlib.errmsg_.c_str());
Expand Down