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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-5553] don&apos;t call async signal unsafe functions in signal handlers</title>
                <link>https://jira.mongodb.org/browse/SERVER-5553</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There is already a comment about this for rawOut.  Other signal handling code should be audited as well.&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&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;  margin-top: 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;    /* note: can&apos;t use malloc herein - may be in signal handler.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&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;             logLockless() likely does not comply and should still be fixed todo&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;             likewise class string?&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;    */&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;   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;    void rawOut( const string &amp;amp;s ) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="35793">SERVER-5553</key>
            <summary>don&apos;t call async signal unsafe functions in signal handlers</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Mon, 9 Apr 2012 17:25:24 +0000</created>
                <updated>Mon, 11 Jul 2016 18:34:48 +0000</updated>
                            <resolved>Mon, 7 Apr 2014 20:55:27 +0000</resolved>
                                                    <fixVersion>2.7.0</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="539625" author="xgen-internal-githook" created="Mon, 7 Apr 2014 19:38:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5553&quot; title=&quot;don&amp;#39;t call async signal unsafe functions in signal handlers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5553&quot;&gt;&lt;del&gt;SERVER-5553&lt;/del&gt;&lt;/a&gt; Use malloc-free ostream in signal handlers&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/90e2cf22bfe2db9ad8430f4b0aeb6024c709613f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/90e2cf22bfe2db9ad8430f4b0aeb6024c709613f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="534372" author="xgen-internal-githook" created="Thu, 3 Apr 2014 17:16:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;andy10gen&apos;, u&apos;name&apos;: u&apos;Andy Schwerin&apos;, u&apos;email&apos;: u&apos;schwerin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5553&quot; title=&quot;don&amp;#39;t call async signal unsafe functions in signal handlers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5553&quot;&gt;&lt;del&gt;SERVER-5553&lt;/del&gt;&lt;/a&gt; Eliminate malloc from printStacktrace(std::ostream&amp;amp;).&lt;/p&gt;

&lt;p&gt;This also opens the exciting possibility of displaying the base address&lt;br/&gt;
of the file containing the address, which would let us dump stacks when&lt;br/&gt;
ASLR is in use.  However, this implementation preserves the format used&lt;br/&gt;
in the Linux backtrace_symbols() implementation.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/881b2ee9ff3b4cb1dfe1d01957e717d8497cf8cf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/881b2ee9ff3b4cb1dfe1d01957e717d8497cf8cf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="534371" author="xgen-internal-githook" created="Thu, 3 Apr 2014 17:16:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;andy10gen&apos;, u&apos;name&apos;: u&apos;Andy Schwerin&apos;, u&apos;email&apos;: u&apos;schwerin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5553&quot; title=&quot;don&amp;#39;t call async signal unsafe functions in signal handlers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5553&quot;&gt;&lt;del&gt;SERVER-5553&lt;/del&gt;&lt;/a&gt; Remove a heap allocation from the log event encoder.&lt;/p&gt;

&lt;p&gt;The goal is to eventually have a logging path that is truly safe to&lt;br/&gt;
use in a signal handler.  This patch advances the cause by removing&lt;br/&gt;
the heap allocation caused by returning a string in the date formatters.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/962b4ab67f58e80c2ee7d82f9415017d8fc17056&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/962b4ab67f58e80c2ee7d82f9415017d8fc17056&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="107898" author="aaron" created="Mon, 9 Apr 2012 17:26:24 +0000"  >&lt;p&gt;&amp;lt;&lt;a href=&quot;https://www.securecoding.cert.org/confluence/display/seccode/SIG30-C.+Call+only+asynchronous-safe+functions+within+signal+handlers&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.securecoding.cert.org/confluence/display/seccode/SIG30-C.+Call+only+asynchronous-safe+functions+within+signal+handlers&lt;/a&gt;&amp;gt;&lt;/p&gt;</comment>
                    </comments>
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                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="128653">SERVER-13429</issuekey>
        </issuelink>
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