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<h3>

Ben Gamari pushed to branch wip/nonmoving-fixes

at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>

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<h4>

Commits:

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<ul>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d13e4c8f335ab8cac8b68790686f79f1c9c2b5b0">d13e4c8f</a></strong>

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<span>by GHC GitLab CI</span>

<i>at 2020-11-26T22:19:55-05:00</i>

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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">nonmoving: Ensure that evacuated large objects are marked

See Note [Non-moving GC: Marking evacuated objects].

</pre>

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<h4>2 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#37a93df244a7789fddf557443b6398d06763e9cc">

rts/sm/Evac.c

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<li class="file-stats">

<a href="#b4a38dad10ba126e05a0b6adc99aa0c2eb742875">

rts/sm/NonMoving.c

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<h4>Changes:</h4>

<li id="37a93df244a7789fddf557443b6398d06763e9cc">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d13e4c8f335ab8cac8b68790686f79f1c9c2b5b0#37a93df244a7789fddf557443b6398d06763e9cc"><strong>rts/sm/Evac.c</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -109,6 +109,8 @@ alloc_for_copy (uint32_t size, uint32_t gen_no)</td>

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<pre style="margin: 0;"> <span id="LC109" class="line" lang="c">            <span class="c1" style="color: #998; font-style: italic;">//</span></span>

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<pre style="margin: 0;"> <span id="LC110" class="line" lang="c">            <span class="c1" style="color: #998; font-style: italic;">// However, if we are in a deadlock detection GC then we disable aging</span></span>

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<pre style="margin: 0;"> <span id="LC111" class="line" lang="c">            <span class="c1" style="color: #998; font-style: italic;">// so there is no need.</span></span>

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<pre style="margin: 0;">+<span id="LC112" class="line" lang="c">            <span class="c1" style="color: #998; font-style: italic;">//</span></span>

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<pre style="margin: 0;">+<span id="LC113" class="line" lang="c">            <span class="c1" style="color: #998; font-style: italic;">// See Note [Non-moving GC: Marking evacuated objects].</span></span>

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<pre style="margin: 0;"> <span id="LC114" class="line" lang="c">            <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">major_gc</span> <span class="o" style="font-weight: 600;">&&</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">deadlock_detect_gc</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC115" class="line" lang="c">                <span class="n" style="color: #333;">markQueuePushClosureGC</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">gct</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">cap</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">upd_rem_set</span><span class="p">.</span><span class="n" style="color: #333;">queue</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">StgClosure</span> <span class="o" style="font-weight: 600;">*</span><span class="p">)</span> <span class="n" style="color: #333;">to</span><span class="p">);</span></span>

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<pre style="margin: 0;"> <span id="LC116" class="line" lang="c">            <span class="k" style="font-weight: 600;">return</span> <span class="n" style="color: #333;">to</span><span class="p">;</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -134,6 +136,52 @@ alloc_for_copy (uint32_t size, uint32_t gen_no)</td>

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<pre style="margin: 0;"> <span id="LC136" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">   The evacuate() code</span></span>

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<pre style="margin: 0;"> <span id="LC137" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">   -------------------------------------------------------------------------- */</span></span>

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<pre style="margin: 0;"> <span id="LC138" class="line" lang="c"></span>

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<pre style="margin: 0;">+<span id="LC139" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/*</span></span>

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<pre style="margin: 0;">+<span id="LC140" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * Note [Non-moving GC: Marking evacuated objects]</span></span>

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<pre style="margin: 0;">+<span id="LC141" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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<pre style="margin: 0;">+<span id="LC142" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

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<pre style="margin: 0;">+<span id="LC143" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * When the non-moving collector is in use we must be careful to ensure that any</span></span>

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<pre style="margin: 0;">+<span id="LC144" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * references to objects in the non-moving generation from younger generations</span></span>

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<td class="diff-line-num new new_line" data-linenumber="145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC145" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * are pushed to the mark queue.</span></span>

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<td class="diff-line-num new new_line" data-linenumber="146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC146" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

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<td class="diff-line-num new new_line" data-linenumber="147" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC147" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * In particular we need to ensure that we handle newly-promoted objects are</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="148" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC148" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * correctly marked. For instance, consider this case:</span></span>

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<pre style="margin: 0;">+<span id="LC149" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC150" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *     generation 0                          generation 1</span></span>

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<pre style="margin: 0;">+<span id="LC151" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *    ──────────────                        ──────────────</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC152" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

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<pre style="margin: 0;">+<span id="LC153" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *                                            ┌───────┐</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC154" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *      ┌───────┐                             │   A   │</span></span>

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<pre style="margin: 0;">+<span id="LC155" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *      │   B   │ ◁────────────────────────── │       │</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC156" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *      │       │ ──┬─────────────────┐       └───────┘</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC157" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *      └───────┘   ┆        after GC │</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC158" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *                  ┆                 │</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC159" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *      ┌───────┐   ┆ before GC       │       ┌───────┐</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="160" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC160" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *      │   C   │ ◁┄┘                 └─────▷ │   C'  │</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="161" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC161" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *      │       │                             │       │</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC162" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *      └───────┘                             └───────┘</span></span>

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<pre style="margin: 0;">+<span id="LC163" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

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<td class="diff-line-num new new_line" data-linenumber="164" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

164

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<pre style="margin: 0;">+<span id="LC164" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

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<td class="diff-line-num new new_line" data-linenumber="165" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

165

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<pre style="margin: 0;">+<span id="LC165" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * In this case object C started off in generation 0 and was evacuated into</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="166" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

166

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<pre style="margin: 0;">+<span id="LC166" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * generation 1 during the preparatory GC. However, the only reference to C'</span></span>

</pre>

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167

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<pre style="margin: 0;">+<span id="LC167" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * is from B, which lives in the generation 0 (via aging); this reference will</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="168" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

168

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<pre style="margin: 0;">+<span id="LC168" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * not be visible to the concurrent non-moving collector (which can only</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="169" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

169

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<pre style="margin: 0;">+<span id="LC169" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * traverse the generation 1 heap). Consequently, upon evacuating C we need to</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="170" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

170

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<pre style="margin: 0;">+<span id="LC170" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * ensure that C' is added to the update remembered set as we know that it will</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

171

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<pre style="margin: 0;">+<span id="LC171" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * continue to be reachable via B (which is assumed to be reachable as it lives</span></span>

</pre>

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172

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<pre style="margin: 0;">+<span id="LC172" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * in a younger generation).</span></span>

</pre>

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173

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<pre style="margin: 0;">+<span id="LC173" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="174" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC174" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * Where this happens depends upon the type of the object (e.g. C'):</span></span>

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<td class="diff-line-num new new_line" data-linenumber="175" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

175

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<pre style="margin: 0;">+<span id="LC175" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC176" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *  - In the case of "normal" small heap-allocated objects this happens in</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="177" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC177" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *    alloc_for_copy.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC178" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *  - In the case of compact region this happens in evacuate_compact.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="179" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

179

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<pre style="margin: 0;">+<span id="LC179" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *  - In the case of large objects this happens in evacuate_large.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

180

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<pre style="margin: 0;">+<span id="LC180" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="181" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC181" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * See also Note [Aging under the non-moving collector] in NonMoving.c.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="182" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC182" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="183" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC183" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> */</span></span>

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<td class="diff-line-num new old_line" data-linenumber="137" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="184" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC184" class="line" lang="c"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="137" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="185" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC185" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* size is in words */</span></span>

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<td class="diff-line-num old_line" data-linenumber="138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

138

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<td class="diff-line-num new_line" data-linenumber="186" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC186" class="line" lang="c"><span class="n" style="color: #333;">STATIC_INLINE</span> <span class="n" style="color: #333;">GNUC_ATTR_HOT</span> <span class="kt" style="color: #458; font-weight: 600;">void</span></span>

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<td class="diff-line-num old_line" data-linenumber="139" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

139

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<td class="diff-line-num new_line" data-linenumber="187" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC187" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">copy_tag</span><span class="p">(</span><span class="n" style="color: #333;">StgClosure</span> <span class="o" style="font-weight: 600;">**</span><span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="k" style="font-weight: 600;">const</span> <span class="n" style="color: #333;">StgInfoTable</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">info</span><span class="p">,</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="351" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="399" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -351,6 +399,9 @@ evacuate_large(StgPtr p)</td>

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<pre style="margin: 0;"> <span id="LC399" class="line" lang="c">  <span class="n" style="color: #333;">__atomic_fetch_or</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">bd</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">flags</span><span class="p">,</span> <span class="n" style="color: #333;">BF_EVACUATED</span><span class="p">,</span> <span class="n" style="color: #333;">__ATOMIC_ACQ_REL</span><span class="p">);</span></span>

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<td class="diff-line-num new_line" data-linenumber="400" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC400" class="line" lang="c">  <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">RTS_UNLIKELY</span><span class="p">(</span><span class="n" style="color: #333;">RtsFlags</span><span class="p">.</span><span class="n" style="color: #333;">GcFlags</span><span class="p">.</span><span class="n" style="color: #333;">useNonmoving</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">new_gen</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">oldest_gen</span><span class="p">))</span> <span class="p">{</span></span>

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<pre style="margin: 0;"> <span id="LC401" class="line" lang="c">      <span class="n" style="color: #333;">__atomic_fetch_or</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">bd</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">flags</span><span class="p">,</span> <span class="n" style="color: #333;">BF_NONMOVING</span><span class="p">,</span> <span class="n" style="color: #333;">__ATOMIC_ACQ_REL</span><span class="p">);</span></span>

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<td class="diff-line-num new new_line" data-linenumber="402" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC402" class="line" lang="c"></span>

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<td class="diff-line-num new old_line" data-linenumber="354" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="403" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC403" class="line" lang="c">      <span class="c1" style="color: #998; font-style: italic;">// See Note [Non-moving GC: Marking evacuated objects].</span></span>

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<pre style="margin: 0;">+<span id="LC404" class="line" lang="c">      <span class="n" style="color: #333;">markQueuePushClosureGC</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">gct</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">cap</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">upd_rem_set</span><span class="p">.</span><span class="n" style="color: #333;">queue</span><span class="p">,</span> <span class="n" style="color: #333;">p</span><span class="p">);</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="405" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC405" class="line" lang="c">  <span class="p">}</span></span>

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<td class="diff-line-num old_line" data-linenumber="355" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="406" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC406" class="line" lang="c">  <span class="n" style="color: #333;">initBdescr</span><span class="p">(</span><span class="n" style="color: #333;">bd</span><span class="p">,</span> <span class="n" style="color: #333;">new_gen</span><span class="p">,</span> <span class="n" style="color: #333;">new_gen</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">to</span><span class="p">);</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="356" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="407" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC407" class="line" lang="c"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="505" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="556" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -505,6 +556,9 @@ evacuate_compact (StgPtr p)</td>

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<td class="diff-line-num old_line" data-linenumber="505" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="556" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC556" class="line" lang="c">    <span class="n" style="color: #333;">bd</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">flags</span> <span class="o" style="font-weight: 600;">|=</span> <span class="n" style="color: #333;">BF_EVACUATED</span><span class="p">;</span></span>

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<td class="diff-line-num old_line" data-linenumber="506" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC557" class="line" lang="c">    <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">RTS_UNLIKELY</span><span class="p">(</span><span class="n" style="color: #333;">RtsFlags</span><span class="p">.</span><span class="n" style="color: #333;">GcFlags</span><span class="p">.</span><span class="n" style="color: #333;">useNonmoving</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">new_gen</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">oldest_gen</span><span class="p">))</span> <span class="p">{</span></span>

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<td class="diff-line-num old_line" data-linenumber="507" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="558" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC558" class="line" lang="c">      <span class="n" style="color: #333;">__atomic_fetch_or</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">bd</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">flags</span><span class="p">,</span> <span class="n" style="color: #333;">BF_NONMOVING</span><span class="p">,</span> <span class="n" style="color: #333;">__ATOMIC_RELAXED</span><span class="p">);</span></span>

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<td class="diff-line-num new old_line" data-linenumber="508" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="559" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC559" class="line" lang="c"></span>

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<td class="diff-line-num new old_line" data-linenumber="508" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="560" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC560" class="line" lang="c">      <span class="c1" style="color: #998; font-style: italic;">// See Note [Non-moving GC: Marking evacuated objects].</span></span>

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<td class="diff-line-num new old_line" data-linenumber="508" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="561" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC561" class="line" lang="c">      <span class="n" style="color: #333;">markQueuePushClosureGC</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">gct</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">cap</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">upd_rem_set</span><span class="p">.</span><span class="n" style="color: #333;">queue</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">StgClosure</span> <span class="o" style="font-weight: 600;">*</span><span class="p">)</span> <span class="n" style="color: #333;">str</span><span class="p">);</span></span>

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<pre style="margin: 0;"> <span id="LC562" class="line" lang="c">    <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC563" class="line" lang="c">    <span class="n" style="color: #333;">initBdescr</span><span class="p">(</span><span class="n" style="color: #333;">bd</span><span class="p">,</span> <span class="n" style="color: #333;">new_gen</span><span class="p">,</span> <span class="n" style="color: #333;">new_gen</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">to</span><span class="p">);</span></span>

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510

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<pre style="margin: 0;"> <span id="LC564" class="line" lang="c"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="690" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="744" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -690,13 +744,6 @@ loop:</td>

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<pre style="margin: 0;"> <span id="LC744" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">       */</span></span>

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<td class="diff-line-num old_line" data-linenumber="691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="745" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC745" class="line" lang="c">      <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">flags</span> <span class="o" style="font-weight: 600;">&</span> <span class="n" style="color: #333;">BF_LARGE</span><span class="p">)</span> <span class="p">{</span></span>

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<td class="diff-line-num old_line" data-linenumber="692" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="746" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC746" class="line" lang="c">          <span class="n" style="color: #333;">evacuate_large</span><span class="p">((</span><span class="n" style="color: #333;">P_</span><span class="p">)</span><span class="n" style="color: #333;">q</span><span class="p">);</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="747" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC693" class="line" lang="c"></span>

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<td class="diff-line-num old old_line" data-linenumber="694" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="747" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC694" class="line" lang="c">          <span class="c1" style="color: #998; font-style: italic;">// We may have evacuated the block to the nonmoving generation. If so</span></span>

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<td class="diff-line-num old old_line" data-linenumber="695" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC695" class="line" lang="c">          <span class="c1" style="color: #998; font-style: italic;">// we need to make sure it is added to the mark queue since the only</span></span>

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<td class="diff-line-num old old_line" data-linenumber="696" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="747" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC696" class="line" lang="c">          <span class="c1" style="color: #998; font-style: italic;">// reference to it may be from the moving heap.</span></span>

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<td class="diff-line-num old old_line" data-linenumber="697" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="747" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC697" class="line" lang="c">          <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">major_gc</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">flags</span> <span class="o" style="font-weight: 600;">&</span> <span class="n" style="color: #333;">BF_NONMOVING</span> <span class="o" style="font-weight: 600;">&&</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">deadlock_detect_gc</span><span class="p">)</span> <span class="p">{</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC698" class="line" lang="c">              <span class="n" style="color: #333;">markQueuePushClosureGC</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">gct</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">cap</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">upd_rem_set</span><span class="p">.</span><span class="n" style="color: #333;">queue</span><span class="p">,</span> <span class="n" style="color: #333;">q</span><span class="p">);</span></span>

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699

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<pre style="margin: 0;">-<span id="LC699" class="line" lang="c">          <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="700" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

700

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<td class="diff-line-num new_line" data-linenumber="747" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

747

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<pre style="margin: 0;"> <span id="LC747" class="line" lang="c">          <span class="k" style="font-weight: 600;">return</span><span class="p">;</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="701" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

701

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<td class="diff-line-num new_line" data-linenumber="748" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

748

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<pre style="margin: 0;"> <span id="LC748" class="line" lang="c">      <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="702" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

702

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749

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<pre style="margin: 0;"> <span id="LC749" class="line" lang="c"></span>

</pre>

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<br>

</li>

<li id="b4a38dad10ba126e05a0b6adc99aa0c2eb742875">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d13e4c8f335ab8cac8b68790686f79f1c9c2b5b0#b4a38dad10ba126e05a0b6adc99aa0c2eb742875"><strong>rts/sm/NonMoving.c</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -204,6 +204,10 @@ Mutex concurrent_coll_finished_lock;</td>

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<td class="diff-line-num old_line" data-linenumber="204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

204

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204

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<pre style="margin: 0;"> <span id="LC204" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *  - Note [Aging under the non-moving collector] (NonMoving.c) describes how</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

205

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205

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<pre style="margin: 0;"> <span id="LC205" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *    we accommodate aging</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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206

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<pre style="margin: 0;"> <span id="LC206" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

207

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<pre style="margin: 0;">+<span id="LC207" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *  - Note [Non-moving GC: Marking evacuated objects] (Evac.c) describes how</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

208

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<pre style="margin: 0;">+<span id="LC208" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *    non-moving objects reached by evacuate() are marked, which is necessary</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC209" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *    due to aging.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="210" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC210" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

207

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<td class="diff-line-num new_line" data-linenumber="211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC211" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *  - Note [Large objects in the non-moving collector] (NonMovingMark.c)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="212" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

212

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<pre style="margin: 0;"> <span id="LC212" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *    describes how we track large objects.</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC213" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="317" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="321" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -317,6 +321,8 @@ Mutex concurrent_coll_finished_lock;</td>

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<pre style="margin: 0;"> <span id="LC321" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="318" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="322" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC322" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *     The non-moving collector will come to C in the mark queue and mark it.</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="323" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC323" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="324" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC324" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * The implementation details of this are described in Note [Non-moving GC:</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC325" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * Marking evacuated objects] in Evac.c.</span></span>

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<td class="diff-line-num old_line" data-linenumber="320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

320

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<td class="diff-line-num new_line" data-linenumber="326" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

326

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<pre style="margin: 0;"> <span id="LC326" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>

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<td class="diff-line-num old_line" data-linenumber="321" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

321

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327

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<pre style="margin: 0;"> <span id="LC327" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * Note [Deadlock detection under the non-moving collector]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="322" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

322

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328

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<pre style="margin: 0;"> <span id="LC328" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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