EXC_BAD_ACCESS在设备上，但罚款在模拟器 [英] EXC_BAD_ACCESS on device, but fine on Simulator

问题描述

我有一个滚动视图应用程序在模拟器上运行良好，但是，当安装在设备上时，它给我一个EXC_BAD_ACCESS，当我试图滚动一页。我已经运行它通过仪器与分配和泄漏，但没有什么是泄漏，没有僵尸消息...我只是好奇什么可能会导致这样的差异在模拟器VS设备？任何调试此方法，因为我的符号崩溃日志（部分下面），似乎不是很象征。

I have a scroll view app which runs fine on the simulator, however, when installed on the device, it gives me an EXC_BAD_ACCESS, when i attempt to scroll one page. I have ran it through Instruments with Allocations and Leaks, but nothing is leaked and no zombies are messaged... i'm just curious what could cause such a difference in simulator vs device? Any ways to debug this, since my symbolicated crash log (partial below), doesn't seem to be very symbolicated.

异常类型：EXC_BAD_ACCESS（SIGBUS）
异常代码：KERN_PROTECTION_FAILURE在0x0000000f

崩溃的主题：0

Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000f
Crashed Thread: 0

线程0崩溃：

0 libobjc。 A.dylib           0x0000286e objc_msgSend + 18

1 MyApp                      0x00004fee 0x1000 + 16366

2 UIKit                        0x000668f4 - [UIViewController view] + 104

3 MyApp                    0x00009716 0x1000 + 34582

4 MyApp                    0x0000960c 0x1000 + 34316

5 UIKit                        0x0001426c - [UIScrollView setContentOffset：] + 344

Thread 0 Crashed:
0 libobjc.A.dylib            0x0000286e objc_msgSend + 18
1 MyApp                       0x00004fee 0x1000 + 16366
2 UIKit                         0x000668f4 -[UIViewController view] + 104
3 MyApp                     0x00009716 0x1000 + 34582
4 MyApp                     0x0000960c 0x1000 + 34316
5 UIKit                         0x0001426c -[UIScrollView setContentOffset:] + 344

感谢

推荐答案

你在模拟器中的代码可能有错误，但不是触发EXC_BAD_ACCESS只是运气，你解引用的指针不在未映射内存中。

Your code in the simulator could have the bug, but isn't triggering EXC_BAD_ACCESS by just the luck that a pointer that you dereference is not in unmapped memory. A pointer could be bad, and accessed, but not detected -- it's still a bug.

你已经检查过，没有僵尸是消息，这将是一个错误，我的第一个建议。

You have already checked to see that no Zombies are messaged, which would have been my first suggestion.

接下来要做的是启用Guard Malloc - 然后阅读此

The next thing to do is Enable Guard Malloc -- and then read this

a href =http://developer.apple.com/iphone/library/documentation/Performance/Conceptual/ManagingMemory/Articles/MallocDebug.html =nofollow noreferrer> http://developer.apple.com/iphone /library/documentation/Performance/Conceptual/ManagingMemory/Articles/MallocDebug.html

http://developer.apple.com/iphone/library/documentation/Performance/Conceptual/ManagingMemory/Articles/MallocDebug.html

您只能在模拟器中执行此操作 - 您的目标是使用

You can only do this in the simulator -- your goal is to use the extra-sensitive heap to make the bug throw EXC_BAD_ACCESS in the simulator.

在文章中：

1. 查看如何在GDB中设置变量


2. 阅读检测堆腐败部分

这篇关于EXC_BAD_ACCESS在设备上，但罚款在模拟器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！