这篇文章主要为大家介绍了.NET Windbg分析某妇产医院WPF内存溢出，有需要的朋友可以借鉴参考下，希望能够有所帮助，祝大家多多进步，早日升职加薪
一：背景
1. 讲故事
上个月有位朋友找到我，说他的程序存在内存溢出情况，寻求如何解决。
要解决还得通过 windbg 分析啦。
二：Windbg 分析
1. 为什么会内存溢出
大家都知道内存溢出对应着 .NET 中的 OutOfMemoryException 异常，这种异常有可能是托管代码手工抛出的，也有可能是CLR层面抛出的，言外之意就是可以通过两种方式排查。
- 托管线程是否挂载着异常？
0:000> !t ThreadCount: 23 UnstartedThread: 0 BackgroundThread: 5 PendingThread: 0 DeadThread: 17 Hosted Runtime: no Lock ID OSID ThreadOBJ State GC Mode GC Alloc Context Domain Count Apt Exception 0 1 362c 00fac868 26020 Preemptive 7ED701A0:00000000 00fa6b60 0 STA 5 2 2d70 00fbeba0 2b220 Preemptive 7EBA7AC0:00000000 00fa6b60 0 MTA (Finalizer) 7 3 3264 061c8890 102a220 Preemptive 00000000:00000000 00fa6b60 0 MTA (Threadpool Worker) 17 15 3f98 19682b90 202b220 Preemptive 7EBB0830:00000000 00fa6b60 0 MTA XXXX 16 0 2845fb00 35820 Preemptive 00000000:00000000 00fa6b60 0 Ukn 18 14 a7c 2842b1c8 202b220 Preemptive 00000000:00000000 00fa6b60 0 MTA XXXX 6 0 2c9b3778 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 18 0 288a1318 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 23 0 288a22f0 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 10 0 2ccf3550 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 21 0 288a1860 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 12 0 288a1da8 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 11 0 2c993640 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 8 0 2ccf3a98 35820 Preemptive 00000000:00000000 00fa6b60 0 Ukn XXXX 9 0 2ccf2030 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 7 0 2c9aed88 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 26 0 28898308 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 25 0 2c492c68 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 4 0 2c993b88 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 20 0 2c9af2d0 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 17 0 2c9afd60 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) XXXX 24 0 2c9b1280 1039820 Preemptive 00000000:00000000 00fa6b60 0 Ukn (Threadpool Worker) 23 22 2658 2c9b02a8 1029220 Preemptive 7ED5BFF8:00000000 00fa6b60 0 MTA (Threadpool Worker)
从输出信息看，这些线程并没有挂载任何托管异常，我去。。。
- 是否在 CLR 上抛出
这主要是看 托管堆(heap) 上的内存分配或者gc回收造成的内存不足，可以用 !ao 命令。
0:000> !ao There was no managed OOM due to allocations on the GC heap
从输出信息看也没有任何异常，尴尬了
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