System panic reference常见panic

本文列举了Symbian OS系统中常见的错误代码及其含义,包括不同类型的内存操作错误、执行环境问题及资源加载失败等情况,并提供了进一步查阅详细文档的链接。


1、E32USER-CBase 63
只有Pop();delete;
2、E32USER-CBase 64
只有Pop();
3、E32USER-CBase 71
只有PushL();
4、E32USER-CBase 90
只有PopAndDestroy();
5、Alloc:
只有PushL(); Pop();
6、KERN-EXEC 3
解引用NULL指针,
7、USER 11
字符串赋值时超过iMaxLength
8、USER 44
非NULL指针重复删除
9、CONE 44
Control being destroyed is still on the control stack,

未调用RemoveFormStack();
10、WSERV 14
Printing with no active font.

一般是调用DrawText();时未设置字体

11、CONE 14

Environment cannot find the specified resource in any resource file

如StringLoader::LoadLC(R_HTTP_TX_SUCCESSFUL); 但R_HTTP_TX_SUCCESSFUL没在资源文件中定义

更详细的可以参见SDK文档:
2nd: Developer Library » API Reference » System panic reference
3nd: Symbian OS v9.2 » Symbian OS reference » System panic reference

 

http://www.newlc.com/Symbian-OS-Error-Codes.html

http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

<think>Hmm, the user is asking about resolving a System.StackOverflowException with HResult 0x800703E9, but they've shared a reference snippet that seems incomplete. Interesting - the exception details show no traceable source or stack trace, which makes this trickier than typical stack overflow cases. Looking back at our conversation history, this appears to be a fresh query despite the "reference previous discussion" note. The user seems to be working on some .NET application (probably C# given the exception type) and hit this critical error. What's notable is the missing stack trace – that's unusually severe. First thought: This HResult 0x800703E9 actually converts to STATUS_STACK_OVERFLOW in Windows error codes, which confirms it's a genuine stack exhaustion. But without stack trace... how frustrating for the developer! Key angles to cover: The user likely needs both immediate mitigation steps and deeper diagnostic approaches. Should emphasize the recursive/infinite loop angle first since that's most common. But must also mention tail call optimization because that's a sneaky one in .NET. Wait - the "cannot evaluate stack trace" suggests possible corrupted runtime state or unsafe code. Should flag unsafe code blocks explicitly since that could explain the missing diagnostics. Also worth noting that in managed code, stack overflow often prevents logging - hence the empty trace. For the debugging section, need to stress proactive approaches since reactive debugging is impossible here. Mini-dump creation might be their only salvage option if the app crashes consistently. Considering the user's potential skill level: Stack overflows are intermediate/exclusive level issues. Should avoid oversimplifying but provide concrete steps. They'll probably need both code review techniques and IDE settings adjustments. Ah! Almost forgot the 64-bit process angle - that's crucial for increasing stack space temporarily. And the registry-based stack size increase as last resort, though with strong warnings about system stability. For diagnostics tools, must include both Visual Studio options and SysInternals - Process Explorer can show stack consumption in real-time which might capture the overflow in action. Final thought: Should structure from most common (recursion fixes) to most severe (memory corruption). The tone needs urgency but not panic - this is solvable with methodical approach. </think>以下是解决 `System.StackOverflowException`(HResult `0x800703E9`)的完整方案,结合异常原理和实战步骤: --- ### **异常原因分析** 此异常表示**线程调用栈耗尽**,常见于: 1. **无限递归**:函数递归调用未设终止条件 ```csharp void Crash() { Crash(); } // 典型死循环 ``` 2. **深层递归**:合理递归但栈空间不足(默认栈大小:32位进程1MB/64位进程4MB) 3. **循环引用序列化**:对象互相引用(如 `A.B = B; B.A = A`),序列化时无限循环 4. **大型局部变量**:如 `int[1000000] arr` 超过栈容量 --- ### **解决方案(逐步操作)** #### **1. 定位递归/循环问题** - **检查代码逻辑**: - 所有递归函数必须有终止条件 - 避免对象间循环引用(可用弱引用 `WeakReference`) - **调试技巧**: ```csharp // 添加深度计数器 void RecursiveMethod(int depth) { if (depth > 1000) throw new Exception("递归过深"); // 安全阀 RecursiveMethod(depth + 1); } ``` #### **2. 增加栈空间(临时方案)** - **创建新线程指定栈大小**: ```csharp var thread = new Thread(() => YourMethod(), 1024 * 1024 * 64); // 64MB栈 thread.Start(); ``` - **修改系统栈上限(Windows)**: ```powershell # 注册表路径 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\kernel # 新增DWORD值:ThreadStackSize (字节为单位,如0x100000=1MB) ``` #### **3. 优化代码结构** - **递归转迭代**: ```csharp // 递归改循环示例(阶乘计算) long Factorial(int n) { long result = 1; for (int i = 1; i <= n; i++) result *= i; return result; } ``` - **尾递归优化**(需编译器支持): ```csharp // C#开启尾调用优化 [MethodImpl(MethodImplOptions.AggressiveOptimization)] void TailRecursive() { /* ... */ } ``` #### **4. 诊断工具辅助** - **内存转储分析**: ```powershell # 生成转储文件 procdump -ma -e YourApp.exe ``` 用 WinDbg 分析: ``` !dumpstack -ee // 查看异常堆栈 !eeheap -gc // 检查GC堆 ``` - **性能分析器**: - Visual Studio → **调试** → **性能分析器** → **.NET异步调用**视图 --- ### **预防措施** 1. 代码审查时重点关注递归深度和循环引用 2. 单元测试中加入栈深度检测 3. 大型数据集改用堆分配(集合类/数组等) 4. 异步编程中避免 `async void`(改用 `async Task`) > 关键提示:栈溢出通常无法捕获(`catch`块无效),需提前预防。若在非托管代码中发生,检查P/Invoke调用是否溢出[^1]。 --- **
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