test: remove dependency on node-weak

LICENSE

@@ -1071,23 +1071,6 @@ The externally maintained libraries used by Node.js are:
     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   """
 
-- node-weak, located at test/gc/node_modules/weak, is licensed as follows:
-  """
-    Copyright (c) 2011, Ben Noordhuis <info@bnoordhuis.nl>
-
-    Permission to use, copy, modify, and/or distribute this software for any
-    purpose with or without fee is hereby granted, provided that the above
-    copyright notice and this permission notice appear in all copies.
-
-    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-  """
-
 - v8_inspector, located at deps/v8_inspector/third_party/v8_inspector, is licensed as follows:
   """
     // Copyright 2015 The Chromium Authors. All rights reserved.

Makefile

@@ -133,10 +133,11 @@ test-parallel: all
 test-valgrind: all
 	$(PYTHON) tools/test.py --mode=release --valgrind sequential parallel message
 
-test/gc/node_modules/weak/build/Release/weakref.node: $(NODE_EXE)
+test/gc/build/Release/binding.node: \
+	$(NODE_EXE) test/gc/binding.cc test/gc/binding.gyp
 	$(NODE) deps/npm/node_modules/node-gyp/bin/node-gyp rebuild \
 		--python="$(PYTHON)" \
-		--directory="$(shell pwd)/test/gc/node_modules/weak" \
+		--directory="$(shell pwd)/test/gc" \
 		--nodedir="$(shell pwd)"
 
 # Implicitly depends on $(NODE_EXE), see the build-addons rule for rationale.
@@ -197,12 +198,12 @@ clear-stalled:
 	ps awwx | grep Release/node | grep -v grep | cat
 	ps awwx | grep Release/node | grep -v grep | awk '{print $$1}' | $(XARGS) kill
 
-test-gc: all test/gc/node_modules/weak/build/Release/weakref.node
+test-gc: all test/gc/build/Release/binding.node
 	$(PYTHON) tools/test.py --mode=release gc
 
 test-build: | all build-addons
 
-test-all: test-build test/gc/node_modules/weak/build/Release/weakref.node
+test-all: test-build test/gc/build/Release/binding.node
 	$(PYTHON) tools/test.py --mode=debug,release
 
 test-all-valgrind: test-build
@@ -737,6 +738,7 @@ CPPLINT_FILES = $(filter-out $(CPPLINT_EXCLUDE), $(wildcard \
 	test/addons/*/*.h \
 	test/cctest/*.cc \
 	test/cctest/*.h \
+	test/gc/binding.cc \
 	tools/icu/*.cc \
 	tools/icu/*.h \
 	))

test/gc/.gitignore

@@ -0,0 +1 @@
+build/

test/gc/binding.cc

@@ -0,0 +1,80 @@
+#include "node.h"
+#include "uv.h"
+
+#include <assert.h>
+#include <stdlib.h>
+
+#include <vector>
+
+#ifdef NDEBUG
+#define CHECK(x) do { if (!(x)) abort(); } while (false)
+#else
+#define CHECK assert
+#endif
+
+#define CHECK_EQ(a, b) CHECK((a) == (b))
+
+namespace {
+
+struct Callback {
+  inline Callback(v8::Isolate* isolate,
+                  v8::Local<v8::Object> object,
+                  v8::Local<v8::Function> function)
+      : object(isolate, object), function(isolate, function) {}
+
+  v8::Persistent<v8::Object> object;
+  v8::Persistent<v8::Function> function;
+};
+
+static uv_async_t async_handle;
+static std::vector<Callback*> callbacks;
+
+inline void Prime() {
+  uv_ref(reinterpret_cast<uv_handle_t*>(&async_handle));
+  CHECK_EQ(0, uv_async_send(&async_handle));
+}
+
+inline void AsyncCallback(uv_async_t*) {
+  auto isolate = v8::Isolate::GetCurrent();
+  v8::HandleScope handle_scope(isolate);
+  auto context = isolate->GetCurrentContext();
+  auto global = context->Global();
+  while (!callbacks.empty()) {
+    v8::HandleScope handle_scope(isolate);
+    auto callback = callbacks.back();
+    callbacks.pop_back();
+    auto function = v8::Local<v8::Function>::New(isolate, callback->function);
+    delete callback;
+    if (node::MakeCallback(isolate, global, function, 0, nullptr).IsEmpty())
+      return Prime();  // Have exception, flush remainder on next loop tick.
+  }
+  uv_unref(reinterpret_cast<uv_handle_t*>(&async_handle));
+}
+
+inline void OnGC(const v8::FunctionCallbackInfo<v8::Value>& info) {
+  CHECK(info[0]->IsObject());
+  CHECK(info[1]->IsFunction());
+  auto object = info[0].As<v8::Object>();
+  auto function = info[1].As<v8::Function>();
+  auto callback = new Callback(info.GetIsolate(), object, function);
+  auto on_callback = [] (const v8::WeakCallbackInfo<Callback>& data) {
+    auto callback = data.GetParameter();
+    callbacks.push_back(callback);
+    callback->object.Reset();
+    Prime();
+  };
+  callback->object.SetWeak(callback, on_callback,
+                           v8::WeakCallbackType::kParameter);
+}
+
+inline void Initialize(v8::Local<v8::Object> exports,
+                       v8::Local<v8::Value> module,
+                       v8::Local<v8::Context> context) {
+  NODE_SET_METHOD(module->ToObject(context).ToLocalChecked(), "exports", OnGC);
+  CHECK_EQ(0, uv_async_init(uv_default_loop(), &async_handle, AsyncCallback));
+  uv_unref(reinterpret_cast<uv_handle_t*>(&async_handle));
+}
+
+}  // anonymous namespace
+
+NODE_MODULE_CONTEXT_AWARE(binding, Initialize)

test/gc/binding.gyp

@@ -0,0 +1,9 @@
+{
+  'targets': [
+    {
+      'target_name': 'binding',
+      'defines': [ 'V8_DEPRECATION_WARNINGS=1' ],
+      'sources': [ 'binding.cc' ],
+    },
+  ],
+}