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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-42509] unwind the `ucontext_t` passed to sigaction handlers</title>
                <link>https://jira.mongodb.org/browse/SERVER-42509</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;What we do now is have the signal handler create a new context where it&apos;s standing, and this is not quite right. We don&apos;t want to unwind the handler itself. We want to unwind the context that was executing when the handler took over, and that&apos;s provided as a ucontext_t to the sigaction handler (currently ignored). The context argument can and should be used as our unwinding context.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="880047">SERVER-42509</key>
            <summary>unwind the `ucontext_t` passed to sigaction handlers</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="adam.martin@mongodb.com">ADAM Martin</assignee>
                                    <reporter username="billy.donahue@mongodb.com">Billy Donahue</reporter>
                        <labels>
                    </labels>
                <created>Tue, 30 Jul 2019 17:46:02 +0000</created>
                <updated>Mon, 26 Aug 2019 19:03:47 +0000</updated>
                            <resolved>Mon, 26 Aug 2019 18:38:34 +0000</resolved>
                                                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="2387062" author="sara.williamson" created="Mon, 26 Aug 2019 18:38:34 +0000"  >&lt;p&gt;We are closing this because it is not applicable to any of our platforms.&lt;/p&gt;</comment>
                            <comment id="2351373" author="billy.donahue" created="Tue, 30 Jul 2019 21:35:04 +0000"  >&lt;p&gt;Oh, as Drew pointed out the thing I&apos;m looking for is probably IA-64 specific and this might not work out.&lt;/p&gt;

&lt;p&gt;&quot;On IA-64, unw_context_t has a layout that is compatible with that of ucontext_t and such structures can be initialized with getcontext() instead of unw_getcontext().&quot;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://www.nongnu.org/libunwind/man/unw_getcontext(3).html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.nongnu.org/libunwind/man/unw_getcontext(3).html&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;This was discussed when dinosaurs ruled the earth, and they ruled at the time that it doesn&apos;t matter so much?&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://www.hpl.hp.com/hosted/linux/mail-archives/libunwind/2004-March/000290.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.hpl.hp.com/hosted/linux/mail-archives/libunwind/2004-March/000290.html&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2351294" author="billy.donahue" created="Tue, 30 Jul 2019 20:49:09 +0000"  >&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/0860178805a5a3d9fb94ae057ce70667d206a2d7/src/mongo/util/signal_handlers_synchronous.cpp#L269&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/0860178805a5a3d9fb94ae057ce70667d206a2d7/src/mongo/util/signal_handlers_synchronous.cpp#L269&lt;/a&gt;&lt;/p&gt;</comment>
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