[Mono-dev] Why Create OutOfMemoryException will cause some data of sgen_cardtable be masked

[Marek Safar]

Hello,

I am cc-ing Vlad who can answer your question.

Marek

On Wed, May 9, 2018 at 7:41 AM, xiaozhu <niluzhou1984 at foxmail.com> wrote:

> hi,all
>       I'm doing some research of sgen_cardtable of the embeded mono.
>       And find that ,after the mono_jit_init_version call , some bytes of
> sgen_cardtable is aready setted.
>       Some of the call in mono_jit_init_version will
> call sgen_card_table_wbarrier_set_field to change some bytes of
> sgen_cardtable.
>       But there is one exception that change the memory of sgen_cardtable
> without call any of the sgen_cardtable method.
>       That exception is the invoke of the  Constructor of
> System.OutOfMemoryException.
>       The Call Chain is
>
>                       1.mono_jit_init_version
>                       2.mini_init
>                       3.mono_runtime_init_checked
>                       4.create_domain_objects
>                       5.mono_exception_from_name_two_strings_checked
>                       6.create_exception_two_strings
>                       7.mono_runtime_invoke_checked
>
>
>       I have tested the newest stable release of mono,The result is the
> same.
>
> The Quesition is :
>
>     Why call the ctor of System.OutOfMemoryException will cause some byte
> of  sgen_cardtable be setted without call any method
>     of sgen_cardtable.
>
>
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>
>
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