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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>[CDRIVER-3317] Replace valgrind variant with Memory Sanitizer</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-3317</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;The current valgrind variant is sometimes timing out (e.g. taking over 2 hours). That seems wrong. If that truly is how long it takes, then we should consider if it&apos;s worth the evergreen time, or if we can speed it up somehow.&lt;/p&gt;

&lt;p&gt;ASAN covers everything valgrind checks for aside from uninitialized reads, which MSAN covers (according to this table: &lt;a href=&quot;https://github.com/google/sanitizers/wiki/AddressSanitizerComparisonOfMemoryTools&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/google/sanitizers/wiki/AddressSanitizerComparisonOfMemoryTools&lt;/a&gt;). And the Valgrind task has caught uninitialized reads before, &lt;a href=&quot;https://evergreen.mongodb.com/version/5d52c4bb61837d45d535b491&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;e.g. this patch&lt;/a&gt;. But adding MSAN should warrant removing our Valgrind variant (which currently only runs once a week).&lt;/p&gt;

&lt;p&gt;The biggest hurdle with MSAN seems to be that all dependent libraries (aside from libc) need to be recompiled with MSAN enabled (according to &lt;a href=&quot;https://clang.llvm.org/docs/MemorySanitizer.html#handling-external-code&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://clang.llvm.org/docs/MemorySanitizer.html#handling-external-code&lt;/a&gt;). Sure enough, some initial testing verifies that OpenSSL triggers lots of false positives.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="893683">CDRIVER-3317</key>
            <summary>Replace valgrind variant with Memory Sanitizer</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="ezra.chung@mongodb.com">Ezra Chung</assignee>
                                    <reporter username="kevin.albertson@mongodb.com">Kevin Albertson</reporter>
                        <labels>
                    </labels>
                <created>Wed, 14 Aug 2019 00:54:40 +0000</created>
                <updated>Sat, 28 Oct 2023 11:29:09 +0000</updated>
                            <resolved>Fri, 20 Jan 2023 20:24:54 +0000</resolved>
                                                    <fixVersion>1.24.0</fixVersion>
                                    <component>libmongoc</component>
                    <component>tests</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5128090" author="JIRAUSER1261413" created="Fri, 20 Jan 2023 20:27:13 +0000"  >&lt;p&gt;Marking as fixed given current Evergreen configuration has widespread ASAN-enabled test coverage and Valgrind tasks have since been removed.&lt;/p&gt;</comment>
                            <comment id="5128081" author="JIRAUSER1261413" created="Fri, 20 Jan 2023 20:24:54 +0000"  >&lt;p&gt;PR:&#160;&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/pull/1177&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/pull/1177&lt;/a&gt;&lt;br/&gt;
Commit:&#160;&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/c796edd584d7e49bbe165dc1a25e8f7a344009ce&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/c796edd584d7e49bbe165dc1a25e8f7a344009ce&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2601660" author="xgen-internal-githook" created="Thu, 12 Dec 2019 14:47:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kevin Albertson&apos;, &apos;email&apos;: &apos;kevin.albertson@mongodb.com&apos;, &apos;username&apos;: &apos;kevinAlbs&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-3317&quot; title=&quot;Replace valgrind variant with Memory Sanitizer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-3317&quot;&gt;&lt;del&gt;CDRIVER-3317&lt;/del&gt;&lt;/a&gt; fix valgrind variant; skip slow tests&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/4e5c465e9273213161a66903b35927ff563c6599&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/4e5c465e9273213161a66903b35927ff563c6599&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1355770">CDRIVER-3680</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="310103">SERVER-25689</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1314944">CDRIVER-3620</issuekey>
        </issuelink>
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