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<h3>
Ben Gamari pushed to branch wip/memory-barriers
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/37fb6754b2d9bbe752114f02f942cf8be990ef1f">37fb6754</a></strong>
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<span>by Ben Gamari</span>
<i>at 2019-06-08T20:23:55Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix weaks
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<h4>1 changed file:</h4>
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rts/sm/MarkWeak.c
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<h4>Changes:</h4>
<li id="fc4b339ae37fb0232f0fb9338221077876a4247d">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/37fb6754b2d9bbe752114f02f942cf8be990ef1f#fc4b339ae37fb0232f0fb9338221077876a4247d"><strong>rts/sm/MarkWeak.c</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="234" 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">@@ -234,7 +234,7 @@ static bool tidyWeakList(generation *gen)</td>
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<pre style="margin: 0;"> <span id="LC234" class="line" lang="c"> <span class="n" style="color: #333;">last_w</span> <span class="o" style="font-weight: 600;">=</span> <span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">gen</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">old_weak_ptr_list</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC235" class="line" lang="c"> <span class="k" style="font-weight: 600;">for</span> <span class="p">(</span><span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gen</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">old_weak_ptr_list</span><span class="p">;</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">!=</span> <span class="nb" style="color: #0086b3;">NULL</span><span class="p">;</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">next_w</span><span class="p">)</span> <span class="p">{</span></span>
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236
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<pre style="margin: 0;"> <span id="LC236" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC237" class="line" lang="c"> <span class="n" style="color: #333;">info</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">get_itbl</span></span><span class="p"><span class="idiff">((</span></span><span class="n" style="color: #333;"><span class="idiff">StgClosure</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">*</span></span><span class="p"><span class="idiff">)</span></span><span class="n" style="color: #333;"><span class="idiff">w</span></span><span class="p"><span class="idiff right">)</span>;</span></span>
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<pre style="margin: 0;">+<span id="LC237" class="line" lang="c"> <span class="n" style="color: #333;">info</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">w</span></span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="n" style="color: #333;"><span class="idiff">header</span></span><span class="p"><span class="idiff">.</span></span><span class="n" style="color: #333;"><span class="idiff right">info</span></span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC238" class="line" lang="c"> <span class="n" style="color: #333;">load_load_barrier</span><span class="p">();</span></span>
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<pre style="margin: 0;"> <span id="LC239" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC240" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* There might be a DEAD_WEAK on the list if finalizeWeak# was</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">@@ -246,6 +246,7 @@ static bool tidyWeakList(generation *gen)</td>
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<pre style="margin: 0;"> <span id="LC246" class="line" lang="c"> <span class="k" style="font-weight: 600;">continue</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC247" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC248" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC249" class="line" lang="c"> <span class="n" style="color: #333;">info</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">INFO_PTR_TO_STRUCT</span><span class="p">(</span><span class="n" style="color: #333;">info</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC250" class="line" lang="c"> <span class="k" style="font-weight: 600;">switch</span> <span class="p">(</span><span class="n" style="color: #333;">info</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">type</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;"> <span id="LC251" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC252" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">WEAK</span><span class="p">:</span></span>
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