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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-60115] Fix the Buffer Builder to Correctly use Powers of Two Allocations</title>
                <link>https://jira.mongodb.org/browse/SERVER-60115</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the buffer builder tries to be friendly with the system allocators and ask for powers of two allocations: &lt;a href=&quot;https://github.com/10gen/mongo/blob/34bb8ccdba458e000b7b0ce7b6c0c157619fcdd6/src/mongo/bson/util/builder.h#L460-L462&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/34bb8ccdba458e000b7b0ce7b6c0c157619fcdd6/src/mongo/bson/util/builder.h#L460-L462&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;However, then later down the function call chains, this power of two size is increased by a few bytes: &lt;a href=&quot;https://github.com/10gen/mongo/blob/fcdc972cd6f64bfe710161fb3a0ffc4a5ca329d1/src/mongo/util/shared_buffer.h#L73&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/fcdc972cd6f64bfe710161fb3a0ffc4a5ca329d1/src/mongo/util/shared_buffer.h#L73&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;In this issue, we want to fix this behaviour and make sure that the end allocated size asked from the system allocator (&lt;a href=&quot;https://github.com/10gen/mongo/blob/47b380f03e8898f4706ff01fa2be64dfb72e0dba/src/mongo/util/allocator.cpp#L47&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/47b380f03e8898f4706ff01fa2be64dfb72e0dba/src/mongo/util/allocator.cpp#L47&lt;/a&gt;) is a power of two.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1879804">SERVER-60115</key>
            <summary>Fix the Buffer Builder to Correctly use Powers of Two Allocations</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="mohammad.dashti@mongodb.com">Mohammad Dashti</assignee>
                                    <reporter username="mohammad.dashti@mongodb.com">Mohammad Dashti</reporter>
                        <labels>
                    </labels>
                <created>Tue, 21 Sep 2021 17:00:42 +0000</created>
                <updated>Sun, 29 Oct 2023 21:48:22 +0000</updated>
                            <resolved>Thu, 21 Oct 2021 03:28:57 +0000</resolved>
                                                    <fixVersion>5.2.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4144191" author="xgen-internal-githook" created="Sun, 24 Oct 2021 11:48:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Benety Goh&apos;, &apos;email&apos;: &apos;benety@mongodb.com&apos;, &apos;username&apos;: &apos;benety&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60115&quot; title=&quot;Fix the Buffer Builder to Correctly use Powers of Two Allocations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60115&quot;&gt;&lt;del&gt;SERVER-60115&lt;/del&gt;&lt;/a&gt; Fix compile error in C++20 mode with GCC 11&lt;/p&gt;

&lt;p&gt;This removes MONGO_COMPILER_NOINLINE from Builder::_growReallocate(). The no-inline directive&lt;br/&gt;
somehow triggers the -Werror=array-bounds warning in GCC in the C++ 20 builders.&lt;/p&gt;

&lt;p&gt;This function was originally moved out of line in commit f6d863188b71b420f13b8249579d34de76d80d9c&lt;br/&gt;
but subsequently inlined again in commit 4994a4809269c30a28cdbb686c8c876fad7b163a.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/49b73bcd26b3fc73032587fb3fa5dadd989607a5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/49b73bcd26b3fc73032587fb3fa5dadd989607a5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4137233" author="xgen-internal-githook" created="Thu, 21 Oct 2021 03:07:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mohammad Dashti&apos;, &apos;email&apos;: &apos;mdashti@gmail.com&apos;, &apos;username&apos;: &apos;mdashti&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60115&quot; title=&quot;Fix the Buffer Builder to Correctly use Powers of Two Allocations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60115&quot;&gt;&lt;del&gt;SERVER-60115&lt;/del&gt;&lt;/a&gt; Fixed `BasicBufBuilder` to correctly use powers of two allocations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d7a4c99472599e63b6e1f9cdb66008bb3a99bacd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d7a4c99472599e63b6e1f9cdb66008bb3a99bacd&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1880248">SERVER-60137</issuekey>
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