From d04f7606e6409c9ac47f960f7228c391fa2d086e Mon Sep 17 00:00:00 2001 From: Moe Charm Date: Thu, 14 Aug 2025 21:00:14 +0900 Subject: [PATCH] fix: Update to new Issue #78 for SocketBox deadlock investigation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Previous Issue #76 and PR #77 closed and recreated - New streamlined issue focusing on core deadlock problem - Multiple Arc hypothesis as primary investigation target - Ready for systematic root cause analysis 🔥 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude --- docs/CURRENT_TASK.md | 2 +- socketbox_issue_new.md | 154 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 155 insertions(+), 1 deletion(-) create mode 100644 socketbox_issue_new.md diff --git a/docs/CURRENT_TASK.md b/docs/CURRENT_TASK.md index 5584dcba..7bea43c1 100644 --- a/docs/CURRENT_TASK.md +++ b/docs/CURRENT_TASK.md @@ -167,7 +167,7 @@ if let Some(socket_box) = obj_value.as_any().downcast_ref::() { # ここで無限ブロック - 🔥 SOCKET_METHOD: bind() called が出力されない ``` -### 🚨 **Copilot緊急依頼Issue作成済み**: [Issue #76](https://github.com/moe-charm/nyash/issues/76) +### 🚨 **Copilot緊急依頼Issue再作成**: [Issue #78](https://github.com/moe-charm/nyash/issues/78) - SocketBox専用デッドロック問題の完全解決 - 詳細テストケース・再現手順・期待結果すべて明記 - 他のBox型との差異分析要請 diff --git a/socketbox_issue_new.md b/socketbox_issue_new.md new file mode 100644 index 00000000..ab16f6ca --- /dev/null +++ b/socketbox_issue_new.md @@ -0,0 +1,154 @@ +# 🚨 SocketBox Method Call Deadlock - Critical System Failure + +**Status**: 🔥 **CRITICAL** - Complete SocketBox functionality failure +**Impact**: Phase 9 HTTP server implementation completely blocked +**Priority**: Immediate investigation required + +## 📋 Problem Summary + +All SocketBox methods (`bind()`, `listen()`, `isServer()`, `toString()`) cause infinite blocking/deadlock. Other Box types (StringBox, ArrayBox, MapBox) work normally. + +## 🎯 Root Cause Analysis Completed + +### ✅ **Confirmed Working Components** +- SocketBox creation: `new SocketBox()` ✅ +- Arc reference sharing: `Arc addresses match = true` ✅ +- Clone functionality: Proper Arc sharing ✅ + +### ❌ **Identified Problem Location** +```rust +// src/interpreter/expressions.rs:462-464 +if let Some(socket_box) = obj_value.as_any().downcast_ref::() { + let result = self.execute_socket_method(socket_box, method, arguments)?; + // ↑ Never reaches this line - execute_socket_method is never called +} +``` + +**Core Issue**: Deadlock occurs in method resolution pipeline BEFORE execute_socket_method is reached. + +## 📊 Evidence from Execution Logs + +### 🔥 **Deadlock Reproduction Log** +```bash +[Console LOG] SocketBox作成完了 +[Console LOG] bind実行開始... +🔥 SOCKETBOX CLONE DEBUG: Arc addresses match = true # ← Clone works fine +# Infinite block here - 🔥 SOCKET_METHOD: bind() called never appears +``` + +### ✅ **Normal Box Comparison (ArrayBox)** +```bash +[Console LOG] ArrayBox作成完了 +[Console LOG] push実行開始... +✅ ARRAY_METHOD: push() called # ← Method reached normally +✅ ArrayBox push completed # ← Completes successfully +``` + +## 🧪 **Reproduction Test Cases** + +### **Test 1: Minimal Deadlock Reproduction** +```bash +# Command +timeout 10s ./target/release/nyash test_socket_deadlock_minimal.nyash + +# Expected: Timeout (deadlock) +# Actual Output: +# [Console LOG] SocketBox作成成功 +# [Console LOG] bind()実行開始... +# (infinite block) +``` + +### **Test 2: Other Boxes Normal Operation** +```bash +# Command +./target/release/nyash test_other_boxes_working.nyash + +# Expected: Normal completion +# Actual Output: +# [Console LOG] ✅ ArrayBox正常: size=1 +# [Console LOG] ✅ MapBox正常: value=test_value +# [Console LOG] 🎉 他のBox全て正常動作: 4件成功 +``` + +### **Test 3: All SocketBox Methods** +```bash +# Command +timeout 30s ./target/release/nyash test_socket_methods_comprehensive.nyash + +# Expected: Deadlock on first method call +# All methods (toString, isServer, bind, close) should deadlock +``` + +## 🔍 **Technical Investigation Required** + +### **Primary Hypothesis** +SocketBox's unique **multiple Arc combination** causing circular deadlock: + +```rust +// SocketBox structure (PROBLEMATIC) +pub struct SocketBox { + listener: Arc>>, // Mutex 1 + stream: Arc>>, // Mutex 2 + is_server: Arc>, // Mutex 3 + is_connected: Arc>, // Mutex 4 +} + +// vs Other Boxes (WORKING) +StringBox: Arc only // No Mutex +ArrayBox: Arc>> only // Single Mutex +MapBox: Arc>> only // Single Mutex +``` + +### **Investigation Areas** +1. **Lock ordering**: Multiple mutex acquisition sequence +2. **Recursive locking**: Same mutex re-entry during method resolution +3. **Cross-reference deadlock**: Arc reference cycles +4. **Interpreter pipeline**: Method resolution vs execution stage bottleneck + +## 🎯 **Required Analysis** + +### **Systematic Approach Required** +- **NO band-aid fixes** - Root cause identification essential +- **NO guesswork solutions** - Evidence-based analysis only +- **Complete validation** - All test cases must pass + +### **Investigation Phases** +1. **Architecture Level**: Compare SocketBox vs other Box memory/locking patterns +2. **Runtime Level**: Method resolution pipeline analysis +3. **Concurrency Level**: Arc deadlock detection +4. **Parser/AST Level**: If needed, verify AST generation differences + +## 🧪 **Test Files Provided** + +All test files are ready for immediate execution: +- `test_socket_deadlock_minimal.nyash` - Minimal reproduction +- `test_socket_methods_comprehensive.nyash` - All methods test +- `test_other_boxes_working.nyash` - Normal Box operation verification +- `SOCKETBOX_ISSUE_REPRODUCTION.md` - Complete reproduction guide + +## ✅ **Success Criteria** + +### **Must Achieve** +```bash +# Basic functionality +./target/release/nyash test_socket_deadlock_minimal.nyash +# Expected: Normal completion, no deadlock + +# State management +socket.bind("127.0.0.1", 8080) +socket.isServer() # Must return true + +# All methods working +./target/release/nyash test_socket_methods_comprehensive.nyash +# Expected: All methods complete successfully +``` + +### **Validation Required** +- **Before/After comparison**: Detailed behavior analysis +- **Performance impact**: Ensure fix doesn't degrade other functionality +- **Memory safety**: Maintain Rust safety guarantees +- **Architecture consistency**: Solution aligns with "Everything is Box" philosophy + +--- + +**🚨 This issue completely blocks Phase 9 HTTP server implementation. Immediate resolution critical.** \ No newline at end of file