Hacktoberfest 2026:維護者為十月標記出來的 issue,仍然開放、適合新手。 瀏覽 Hacktoberfest issue

`ObjectWrap` cleanup hooks break pre-built addons on Node.js 26.0.0-26.3.1 runtimes

未關閉
#65,262 1 則留言 1 個 reaction 已指派 0 人 在 GitHub 檢視

還沒有人認領這個 Issue。

評估

難度
4/5
預估耗時
3-5 天
新手友好度
52/100
Issue 類型
缺陷
描述清晰度
基本清楚
活躍度
活躍
技術堆疊
cpp, javascript, node.js
領域
backend

研究方向

從 src/api/hooks.cc:130 中描述的 ObjectWrap 解構函式和 RemoveEnvironmentCleanupHook 呼叫開始,接著使用 26.4.0 標頭,透過 addon.cc 和 index.js 在兩個執行階段版本上重現。比較提交 7ac3fe1992e189502c9153adbd34a6e38643e208 和 1723773d4133fc71215a9cbb7e2b9a2a11fc3688 的變更。完成標準是:預先建置的 addon 在受支援的 26.x 執行階段組合上不再 abort。

由索引模型根據 Issue 內容生成。

描述

addons c++
Version

Node.js headers 26.4.0 or newer
Node.js runtime 26.0.0 up to and including 26.3.1

Platform
Not platform specific, but used:
Linux 7.0.0-28-generic #28~24.04.1-Ubuntu x86_64 x86_64 x86_64 GNU/Linux
Subsystem

src, addons

What steps will reproduce the bug?

The crash depends on header and runtime version. So you will need headers from e.g. Node.js 26.4.0 and two runtimes (e.g. 26.2.0 and 26.4.0)

  1. Sample that just uses ObjectWrap
    addon.cc:
#include <node.h>
#include <node_object_wrap.h>

using namespace v8;

class Thing : public node::ObjectWrap {
 public:
  static void New(const FunctionCallbackInfo<Value>& args) {
    (new Thing())->Wrap(args.This());
  }
};

void Init(Local<Object> exports) {
  Isolate* isolate = Isolate::GetCurrent();
  Local<Context> context = isolate->GetCurrentContext();
  Local<FunctionTemplate> tpl = FunctionTemplate::New(isolate, Thing::New);
  tpl->InstanceTemplate()->SetInternalFieldCount(1);
  exports->Set(context,
               String::NewFromUtf8(isolate, "Thing").ToLocalChecked(),
               tpl->GetFunction(context).ToLocalChecked()).Check();
}

NODE_MODULE(NODE_GYP_MODULE_NAME, Init)

index.js:

const { Thing } = require('./addon.node');

let junk = [];
for (let i = 0; i < 300000; i++) {
  new Thing();                          // wrapped object, immediately unreachable
  junk.push({ a: i });                  // keep allocation rate high so V8 collects on its own
  if (junk.length > 1000) junk = [];
}
console.log('survived');
  1. Compile against 26.4.0 (or newer if you want)
g++ -std=c++20 -fPIC -shared \
    -I</path/to/node-v26.4.0-linux-x64/include/node> \
    -DNODE_GYP_MODULE_NAME=addon \
    -o addon.node addon.cc
  1. Run same binary against two different Node.js versions
# this one will run fine
<path/to/node_26.4> index.js

# this one will crash
<path/to/node_26.2> index.js
How often does it reproduce? Is there a required condition?

Deterministically with 5/5 runs.
See this table for when it crashes:

hdr \ rt 26.0.0 26.3.1 26.4.0 26.7.0
26.0.0 ok ok ok ok
26.3.1 ok ok ok ok
26.4.0 crash crash ok ok
26.7.0 crash crash ok ok

I.e. it crashes with headers >= 26.4.0 when runtime <= 26.3.1.

A explicit trigger of the gc via global.gc() will not cause the failure, it has to be an allocation-driven one.

What is the expected behavior? Why is that the expected behavior?

A pre-built addon that is built against headers of one 26.x release should keep working on another 26.x runtime

What do you see instead?
  #  node[278507]: void node::RemoveEnvironmentCleanupHook(Isolate *, CleanupHook, void *) at ../src/api/hooks.cc:130
  #  Assertion failed: (env) != nullptr

----- Native stack trace -----

 1: 0x813228 node::Assert(node::AssertionInfo const&) [node]
 2: 0x891b90 node::RemoveEnvironmentCleanupHook(v8::Isolate*, void (*)(void*), void*) [node]
 3: 0x73f036ca4045 node::ObjectWrap::RemoveCleanupHook() [/home/user/reproducer/addon.node]
 4: 0x73f036ca393a node::ObjectWrap::~ObjectWrap() [/home/user/reproducer/addon.node]
 5: 0x73f036ca41ec Thing::~Thing() [/home/user/reproducer/addon.node]
 6: 0x73f036ca420c Thing::~Thing() [/home/user/reproducer/addon.node]
 7: 0x73f036ca3fdd node::ObjectWrap::WeakCallback(v8::WeakCallbackInfo<node::ObjectWrap> const&) [/home/user/reproducer/addon.node]
 8: 0xe18a09  [node]
 9: 0xeb3f61  [node]
10: 0xec4582  [node]
11: 0xec425f  [node]
12: 0x194cdf7  [node]
13: 0xeb0372  [node]
14: 0xea3914  [node]
15: 0xea373c  [node]
16: 0xea30cf  [node]
17: 0xe7f25d  [node]
18: 0x133d781  [node]
19: 0x73f02763ea76 
Aborted (core dumped)
Additional information

The causing code change in 26.4.0 is the RemoveCleanupHook(); line added to destructor in commit 7ac3fe1992e189502c9153adbd34a6e38643e208. The call interacts with the improvement of the RemoveEnvironmentCleanupHook function in 1723773d4133fc71215a9cbb7e2b9a2a11fc3688.

When the destructor is called due to headers being 26.4.0 or newer, but the runtime being <= 26.3.1, then it can trigger the CHECK_NOT_NULL(env); of the RemoveEnvironmentCleanupHook function.

Refs: #63642 #63985

主要語言
JavaScript
星號
122k
分支
37.4k
平均合併
4 天 2 小時
30 天內合併 PR
277

貢獻指南

開啟貢獻指南

從這裡開始

  1. 先讀完整個 Issue,再讀專案的貢獻指南。
  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫,在一個分支上完成修改。
  4. 送出 Pull Request,並在描述裡引用這個 Issue 編號。

nodejs/node 的其他 Issue

查看 nodejs/node 的全部 Issue

相似的 Issue

更多 JavaScript Issue

把新 issue 寄到你的電子郵件信箱

精選適合新手參與的 GitHub issue 摘要。