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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-5804] stackchecker broke test on Linux 32-bit</title>
                <link>https://jira.mongodb.org/browse/SERVER-5804</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;http://buildbot.mongodb.org/builders/Linux%2032-bit%20debug/builds/1690&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildbot.mongodb.org/builders/Linux%2032-bit%20debug/builds/1690&lt;/a&gt;&lt;/p&gt;
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;(etc...)&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;Wed May  9 16:07:47 [testsuite] going to run suite: background_job&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;Program received signal SIGSEGV, Segmentation fault.&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;0x08d2adba in mongo::StackChecker::check(char const*) ()&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;</description>
                <environment>Linux 32-bit debug</environment>
        <key id="38304">SERVER-5804</key>
            <summary>stackchecker broke test on Linux 32-bit</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Wed, 9 May 2012 21:10:10 +0000</created>
                <updated>Wed, 10 Dec 2014 23:17:55 +0000</updated>
                            <resolved>Wed, 30 Apr 2014 16:07:20 +0000</resolved>
                                                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="118301" author="milkie" created="Thu, 10 May 2012 19:15:54 +0000"  >&lt;p&gt;I see the bug.  We don&apos;t actually do &quot;StackChecker sc; sc.init();&quot; unless sizeof(void*) == 8.  See Client::initThread() in client.cpp.  Otherwise, the global &quot;checker&quot; pointer never gets set to &quot;this&quot;, it stays 0.&lt;/p&gt;

&lt;p&gt;Fix is to only call StackChecker::check() with sizeof(void*)=8.  Or, put the check at the top of check() function itself.&lt;/p&gt;</comment>
                            <comment id="118271" author="tad" created="Thu, 10 May 2012 18:40:33 +0000"  >&lt;p&gt;It&apos;s incidental to this discussion, but just FYI, a 256 KB StackChecker makes ^C generate a stack overflow in Windows debug builds in Windows XP and Windows Server 2003 (and 2003 R2) ... this happens to both 32-bit and 64-bit versions of mongod.exe.  That&apos;s why I dropped it from 256 KB to 192 KB months ago.  Back then I guess we weren&apos;t using so much stack space and 192 KB was enough.&lt;/p&gt;</comment>
                            <comment id="118248" author="dwight_10gen" created="Thu, 10 May 2012 17:53:48 +0000"  >&lt;p&gt;looking at the output in bb unclear what&apos;s up.  wonder if i broke something or if it is concincidental and the change makes something else manifest?&lt;/p&gt;

&lt;p&gt;one option is to turn off stackchecker for 32 bit linux.  we really just want stackchecker to have a rough idea of how much stack space we use.  it&apos;s informational and thus a bit discretionary.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://buildbot.mongodb.org/builders/Linux%2032-bit%20debug/builds/1695/steps/test/logs/stdio&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildbot.mongodb.org/builders/Linux%2032-bit%20debug/builds/1695/steps/test/logs/stdio&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;or did I do something really dumb (can you read the commit, it&apos;s pretty short?)&lt;/p&gt;</comment>
                            <comment id="118245" author="milkie" created="Thu, 10 May 2012 17:48:32 +0000"  >&lt;p&gt;So to be clear &amp;#8211;&lt;br/&gt;
right now at head of master:&lt;br/&gt;
64-bit debug Windows is broken&lt;br/&gt;
64-bit debug Linux works&lt;br/&gt;
32-bit debug Linux works&lt;/p&gt;

&lt;p&gt;With your code change &amp;#8211;&lt;br/&gt;
64-bit debug Windows works&lt;br/&gt;
64-bit debug Linux works&lt;br/&gt;
32-bit debug Linux crashes&lt;/p&gt;

&lt;p&gt;I&apos;m going to try 32-bit Windows debug right now to see if it breaks with current head of master or it breaks with your code change.&lt;br/&gt;
I don&apos;t have any easily available 32-bit Linux boxes (I ran test directly on the buildslave to determine how it was crashing)&lt;/p&gt;</comment>
                            <comment id="118243" author="dwight_10gen" created="Thu, 10 May 2012 17:41:32 +0000"  >&lt;p&gt;why does this break 32 bit?&lt;/p&gt;

&lt;p&gt;64 bit debug is broken ALWAYS on my machine without this&lt;/p&gt;


</comment>
                            <comment id="118131" author="auto" created="Thu, 10 May 2012 14:32:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: Revert &quot;increase StackChecker maximum to 256KB.  used for _DEBUG builds&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 4cc8a4b19400d98ad1564c57010db68b4dc4b6f4.&lt;br/&gt;
Broke Linux 32-bit debug builds &amp;#8211; &quot;test&quot; is segfaulting in StackChecker&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5804&quot; title=&quot;stackchecker broke test on Linux 32-bit&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5804&quot;&gt;&lt;del&gt;SERVER-5804&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c8396e3ec32f3716a20de2d0c9a13b5b2d466d69&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c8396e3ec32f3716a20de2d0c9a13b5b2d466d69&lt;/a&gt;&lt;/p&gt;</comment>
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