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Memory Dump Analysis Anthology, Volume 7 by Dmitry Vostokov

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FPU Exception

This pattern sometimes happens where we least expect it. Here's an extract from one crash dump raw stack analysis showing exception context, record and the usage of r WinDbg command variant to display FPU registers:

0:002> dps 056c1000 057c0000
[...]
057bdee0 00000008
057bdee4 00000000
057bdee8 057bed6c
057bdeec 0d6e3130
057bdef0 057c0000
057bdef4 057b9000
057bdef8 006e3138
057bdefc 057be200
057bdf00 7c90e48a ntdll!KiUserExceptionDispatcher+0xe
057bdf04 057bed6c
057bdf08 057bdf2c
057bdf0c 057bdf14 057bdf10 057bdf2c 057bdf14 c0000090 057bdf18 00000010 057bdf1c 00000000 057bdf20 79098cc0 mscorjit!Compiler::FlatFPIsSameAsFloat+0xd 057bdf24 00000001 057bdf28 00000000 057bdf2c 0001003f 057bdf30 00000000 057bdf34 00000000 057bdf38 ...

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