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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-53065] std::terminate handler must learn to print ASSERT failures</title>
                <link>https://jira.mongodb.org/browse/SERVER-53065</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;ASSERT statements in unit tests throw TestAssertionFailureException.&lt;br/&gt;
It is deliberately not derived from std::exception or anything else, so that users won&apos;t be tempted to catch it. But the terminate handler is special. The process is dying and this is the only chance we have to figure out what the heck happened. We could make a special carve out for the terminate handler to catch and print TestAssertionFailureException.&lt;/p&gt;

&lt;p&gt;Idea:&lt;/p&gt;

&lt;p&gt;We can even do this by making the terminate handler wildcard &lt;tt&gt;catch(...)&lt;/tt&gt; go through a global registry of Lippincott functions to see if any of them can identify the current exception and produce good diagnostics for it. It&apos;s perhaps unreasonable to expect that the global terminate handler can have a special case for every kind of exception that might be active. Libraries (fmt, boost, unittest) introduce their own exception types. That&apos;s fine as long as they can also add handlers to print diagnostics.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1551148">SERVER-53065</key>
            <summary>std::terminate handler must learn to print ASSERT failures</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="13201">Fixed</resolution>
                                        <assignee username="billy.donahue@mongodb.com">Billy Donahue</assignee>
                                    <reporter username="billy.donahue@mongodb.com">Billy Donahue</reporter>
                        <labels>
                    </labels>
                <created>Tue, 24 Nov 2020 18:31:00 +0000</created>
                <updated>Sun, 29 Oct 2023 22:00:03 +0000</updated>
                            <resolved>Thu, 17 Dec 2020 01:51:34 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3533787" author="xgen-internal-githook" created="Thu, 17 Dec 2020 01:45:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Billy Donahue&apos;, &apos;email&apos;: &apos;billy.donahue@mongodb.com&apos;, &apos;username&apos;: &apos;BillyDonahue&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53065&quot; title=&quot;std::terminate handler must learn to print ASSERT failures&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53065&quot;&gt;&lt;del&gt;SERVER-53065&lt;/del&gt;&lt;/a&gt; enhance terminate handler exception dumps&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0dc0df8b9cc05d76b80cfb1826a7e4c376dac596&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0dc0df8b9cc05d76b80cfb1826a7e4c376dac596&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3516310" author="billy.donahue" created="Fri, 4 Dec 2020 15:24:19 +0000"  >&lt;p&gt;CR &lt;a href=&quot;https://mongodbcr.appspot.com/711710001/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/711710001/&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3511799" author="billy.donahue" created="Wed, 2 Dec 2020 04:00:37 +0000"  >&lt;p&gt;Linking &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53035&quot; title=&quot;provide a way to ASSERT from a non-main thread in unit tests&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53035&quot;&gt;&lt;del&gt;SERVER-53035&lt;/del&gt;&lt;/a&gt; which inspired this ticket. An ASSERT incorrectly performed on a non-main thread would have the following problem. Currently nothing catches that type of thrown exception, so &lt;tt&gt;std::terminate&lt;/tt&gt; will fire. Our terminate handler will have no idea how to print anything about the &lt;tt&gt;TestAssertionFailureException&lt;/tt&gt;, because it just isn&apos;t one of the exception types the handler was compiled with.&lt;/p&gt;

&lt;p&gt;So it comes out of the unittest library, but it&apos;s a general problem. If we link with a library, we are linking with all of its exception types, any of which the std::terminate handler might be asked to handle. It would be useful then for the terminate handler to be extensible to accommodate those exceptions.&lt;/p&gt;</comment>
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            <issuekey id="1550234">SERVER-53035</issuekey>
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