[Mono-dev] 回复: Why Create OutOfMemoryException will cause some dataof sgen_cardtable be masked

xiaozhu niluzhou1984 at foxmail.com
Wed May 16 08:29:31 UTC 2018

Thank You ,Marek .
Thank You , Vlad

------------------ 原始邮件 ------------------
发件人: "Marek Safar"<marek.safar at gmail.com>;
发送时间: 2018年5月16日(星期三) 下午3:14
收件人: "xiaozhu"<niluzhou1984 at foxmail.com>;"Vlad Brezae"<brezaevlad at gmail.com>;
抄送: "mono-devel-list"<mono-devel-list at lists.dot.net>; 
主题: Re: [Mono-dev] Why Create OutOfMemoryException will cause some dataof sgen_cardtable be masked


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


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 

      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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