test: remove dependency on node-weak

Replace node-weak with a small hand-rolled add-on.  We can now drop
node-weak and nan, reducing the size of the source tree by about 750 kB
and the size of the tarball by about 150-300 kB.

PR-URL: #11239
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

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' ],
+    },
+  ],
+}

test/gc/test-http-client-connaborted.js

@@ -2,14 +2,14 @@
 // just like test/gc/http-client.js,
 // but aborting every connection that comes in.
 
-require('../common');
+const common = require('../common');
 
 function serverHandler(req, res) {
   res.connection.destroy();
 }
 
 const http = require('http');
-const weak = require('weak');
+const weak = require(`./build/${common.buildType}/binding`);
 const todo = 500;
 let done = 0;
 let count = 0;

test/gc/test-http-client-onerror.js

@@ -2,7 +2,7 @@
 // just like test/gc/http-client.js,
 // but with an on('error') handler that does nothing.
 
-require('../common');
+const common = require('../common');
 
 function serverHandler(req, res) {
   req.resume();
@@ -11,7 +11,7 @@ function serverHandler(req, res) {
 }
 
 const http = require('http');
-const weak = require('weak');
+const weak = require(`./build/${common.buildType}/binding`);
 const todo = 500;
 let done = 0;
 let count = 0;

test/gc/test-http-client-timeout.js

@@ -2,7 +2,7 @@
 // just like test/gc/http-client.js,
 // but with a timeout set
 
-require('../common');
+const common = require('../common');
 
 function serverHandler(req, res) {
   setTimeout(function() {
@@ -13,7 +13,7 @@ function serverHandler(req, res) {
 }
 
 const http = require('http');
-const weak = require('weak');
+const weak = require(`./build/${common.buildType}/binding`);
 const todo = 550;
 let done = 0;
 let count = 0;

test/gc/test-http-client.js

@@ -1,15 +1,15 @@
 'use strict';
 // just a simple http server and client.
 
-require('../common');
+const common = require('../common');
 
 function serverHandler(req, res) {
   res.writeHead(200, {'Content-Type': 'text/plain'});
   res.end('Hello World\n');
 }
 
 const http = require('http');
-const weak = require('weak');
+const weak = require(`./build/${common.buildType}/binding`);
 const todo = 500;
 let done = 0;
 let count = 0;

test/gc/test-net-timeout.js

@@ -2,7 +2,7 @@
 // just like test/gc/http-client-timeout.js,
 // but using a net server/client instead
 
-require('../common');
+const common = require('../common');
 
 function serverHandler(sock) {
   sock.setTimeout(120000);
@@ -19,7 +19,7 @@ function serverHandler(sock) {
 }
 
 const net = require('net');
-const weak = require('weak');
+const weak = require(`./build/${common.buildType}/binding`);
 const assert = require('assert');
 const todo = 500;
 let done = 0;

tools/license-builder.sh

@@ -79,8 +79,6 @@ addlicense "cpplint.py" "tools/cpplint.py" \
            "$(sed -e '/^$/,$d' -e 's/^#$//' -e 's/^# //' ${rootdir}/tools/cpplint.py | tail -n +3)"
 addlicense "ESLint" "tools/eslint" "$(cat ${rootdir}/tools/eslint/LICENSE)"
 addlicense "gtest" "deps/gtest" "$(cat ${rootdir}/deps/gtest/LICENSE)"
-addlicense "node-weak" "test/gc/node_modules/weak" \
-           "$(cat ${rootdir}/test/gc/node_modules/weak/LICENSE)"
 
 # v8_inspector
 addlicense "v8_inspector" "deps/v8_inspector/third_party/v8_inspector" \

vcbuild.bat

@@ -27,7 +27,7 @@ set msi=
 set upload=
 set licensertf=
 set jslint=
-set buildnodeweak=
+set build_testgc_addon=
 set noetw=
 set noetw_msi_arg=
 set noperfctr=
@@ -61,12 +61,12 @@ if /i "%1"=="test-ci"       set test_args=%test_args% %test_ci_args% -p tap --lo
 if /i "%1"=="test-addons"   set test_args=%test_args% addons&set build_addons=1&goto arg-ok
 if /i "%1"=="test-simple"   set test_args=%test_args% sequential parallel -J&goto arg-ok
 if /i "%1"=="test-message"  set test_args=%test_args% message&goto arg-ok
-if /i "%1"=="test-gc"       set test_args=%test_args% gc&set buildnodeweak=1&goto arg-ok
+if /i "%1"=="test-gc"       set test_args=%test_args% gc&set build_testgc_addon=1&goto arg-ok
 if /i "%1"=="test-inspector" set test_args=%test_args% inspector&goto arg-ok
 if /i "%1"=="test-tick-processor" set test_args=%test_args% tick-processor&goto arg-ok
 if /i "%1"=="test-internet" set test_args=%test_args% internet&goto arg-ok
 if /i "%1"=="test-pummel"   set test_args=%test_args% pummel&goto arg-ok
-if /i "%1"=="test-all"      set test_args=%test_args% sequential parallel message gc inspector internet pummel&set buildnodeweak=1&set jslint=1&goto arg-ok
+if /i "%1"=="test-all"      set test_args=%test_args% sequential parallel message gc inspector internet pummel&set build_testgc_addon=1&set jslint=1&goto arg-ok
 if /i "%1"=="test-known-issues" set test_args=%test_args% known_issues&goto arg-ok
 if /i "%1"=="jslint"        set jslint=1&goto arg-ok
 if /i "%1"=="jslint-ci"     set jslint_ci=1&goto arg-ok
@@ -295,15 +295,14 @@ ssh -F %SSHCONFIG% %STAGINGSERVER% "touch nodejs/%DISTTYPEDIR%/v%FULLVERSION%/no
 :run
 @rem Run tests if requested.
 
-:build-node-weak
-@rem Build node-weak if required
-if "%buildnodeweak%"=="" goto build-addons
-"%config%\node" deps\npm\node_modules\node-gyp\bin\node-gyp rebuild --directory="%~dp0test\gc\node_modules\weak" --nodedir="%~dp0."
-if errorlevel 1 goto build-node-weak-failed
+@rem Build test/gc add-on if required.
+if "%build_testgc_addon%"=="" goto build-addons
+"%config%\node" deps\npm\node_modules\node-gyp\bin\node-gyp rebuild --directory="%~dp0test\gc" --nodedir="%~dp0."
+if errorlevel 1 goto build-testgc-addon-failed
 goto build-addons
 
-:build-node-weak-failed
-echo Failed to build node-weak.
+:build-testgc-addon-failed
+echo Failed to build test/gc add-on."
 goto exit
 
 :build-addons