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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-28958] Windows --dbg=on --opt=off build of mongod does not start</title>
                <link>https://jira.mongodb.org/browse/SERVER-28958</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It looks like the static initializer for &lt;tt&gt;ResourceId&lt;/tt&gt; runs before that of &lt;tt&gt;StringData::ComparatorInterface&lt;/tt&gt; and the process won&apos;t start:&lt;/p&gt;
&lt;p/&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; 	mongod.exe!mongo::ResourceId::ResourceId(mongo::ResourceType type, mongo::StringData ns) mongo\db\concurrency\lock_manager.cpp Line 1119	C++&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&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; 	mongod.exe!mongo::`dynamic initializer for &apos;resourceIdLocalDB&apos;&apos;() mongo\db\concurrency\lock_state.cpp Line 959	C++&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; 	ucrtbased.dll!_initterm�()	Unknown&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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; 	mongod.exe!__scrt_common_main_seh() Line 223	C++&lt;/span&gt;&lt;/pre&gt;
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		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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; 	mongod.exe!__scrt_common_main() Line 296	C++&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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; 	mongod.exe!wmainCRTStartup() Line 17	C++&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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; 	kernel32.dll!BaseThreadInitThunk�()	Unknown&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;This is most likely a result of the recent vtable changes.&lt;/p&gt;</description>
                <environment></environment>
        <key id="377341">SERVER-28958</key>
            <summary>Windows --dbg=on --opt=off build of mongod does not start</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="13201">Fixed</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Apr 2017 13:52:36 +0000</created>
                <updated>Mon, 30 Oct 2023 23:17:13 +0000</updated>
                            <resolved>Wed, 26 Apr 2017 14:33:18 +0000</resolved>
                                    <version>3.5.7</version>
                                    <fixVersion>3.5.7</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1558211" author="xgen-internal-githook" created="Wed, 26 Apr 2017 14:26:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28958&quot; title=&quot;Windows --dbg=on --opt=off build of mongod does not start&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28958&quot;&gt;&lt;del&gt;SERVER-28958&lt;/del&gt;&lt;/a&gt; Remove dependency of ResourceId on SimpleStringDataComparator&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1100c4a3466ee860cdbd6ceb9d9719fe95103700&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1100c4a3466ee860cdbd6ceb9d9719fe95103700&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1557653" author="acm" created="Tue, 25 Apr 2017 19:48:06 +0000"  >&lt;p&gt;Actually, it is ASAN that can do this, not UBSAN:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/google/sanitizers/wiki/AddressSanitizerInitializationOrderFiasco&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/google/sanitizers/wiki/AddressSanitizerInitializationOrderFiasco&lt;/a&gt;&lt;/p&gt;
</comment>
                            <comment id="1557263" author="acm" created="Tue, 25 Apr 2017 15:09:11 +0000"  >&lt;p&gt;Details on what is going wrong here:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;LockState.cpp defines a static &lt;tt&gt;const ResourceId resourceIdLocalDB&lt;/tt&gt;.&lt;/li&gt;
	&lt;li&gt;The constructor for &lt;tt&gt;ResourceId&lt;/tt&gt; contains a call to &lt;tt&gt;SimpleStringDataComparator::kInstance.hash&lt;/tt&gt;.&lt;/li&gt;
	&lt;li&gt;The static for &lt;tt&gt;SimpleStringDataComparator::kInstance.hash&lt;/tt&gt; is declared in a separate TU, &lt;tt&gt;simple_string_data_comparator.cpp&lt;/tt&gt;.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;This is a classic initialization order fiasco, which is a form of undefined behavior. This UB was latent in the codebase; it just chose to exhibit symptoms recently.&lt;/p&gt;

&lt;p&gt;Possible remedies would include:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Making either &lt;tt&gt;ResourceId&lt;/tt&gt; or &lt;tt&gt;SimpleStringDataComparator&lt;/tt&gt; literal types, so that the constants like &lt;tt&gt;resourceIdLocalDB&lt;/tt&gt; or &lt;tt&gt;SimpleStringDataComparator::kInstance&lt;/tt&gt; can be constexpr, so they get constant, rather than dynamic, initialization.&lt;/li&gt;
	&lt;li&gt;Making &lt;tt&gt;resourceIdLocalDB&lt;/tt&gt; and similar into functions, containing a function scoped static &lt;tt&gt;ResourceId&lt;/tt&gt;, rather than a file scoped static.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;In general, we are far to profligate with our use of file scoped statics, and the codebase is rife with these errors. This is unfortunate, because it means that we can&apos;t actually enable the UBSAN check that would call this out for us.&lt;/p&gt;</comment>
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