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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6f84aca31290afc11acde0f86969a535e519e1d5">6f84aca3</a></strong>
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<span>by Ben Gamari</span>
<i>at 2020-04-22T23:13:43-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">rts: Ensure that sigaction structs are initialized
I noticed these may have uninitialized fields when looking into #18037.
The reporter says that zeroing them doesn't fix the MSAN failures they
observe but zeroing them is the right thing to do regardless.
</pre>
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<h4>1 changed file:</h4>
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<a href="#c5644804ff4f1f9fd4ebdbee5805e1a84c8ce09b">
rts/posix/Signals.c
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<h4>Changes:</h4>
<li id="c5644804ff4f1f9fd4ebdbee5805e1a84c8ce09b">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6f84aca31290afc11acde0f86969a535e519e1d5#c5644804ff4f1f9fd4ebdbee5805e1a84c8ce09b"><strong>rts/posix/Signals.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">@@ -624,7 +624,7 @@ set_sigtstp_action (bool handle)</td>
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<pre style="margin: 0;"> <span id="LC624" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span></span>
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625
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<pre style="margin: 0;"> <span id="LC625" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">install_vtalrm_handler</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="n" style="color: #333;">sig</span><span class="p">,</span> <span class="n" style="color: #333;">TickProc</span> <span class="n" style="color: #333;">handle_tick</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC626" class="line" lang="c"><span class="p">{</span></span>
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<pre style="margin: 0;">-<span id="LC627" class="line" lang="c"> <span class="k" style="font-weight: 600;">struct</span> <span class="n" style="color: #333;">sigaction</span> <span class="n" style="color: #333;">action</span><span class="p">;</span></span>
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627
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<pre style="margin: 0;">+<span id="LC627" class="line" lang="c"> <span class="k" style="font-weight: 600;">struct</span> <span class="n" style="color: #333;">sigaction</span> <span class="n" style="color: #333;">action</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">{}</span>;</span></span>
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<pre style="margin: 0;"> <span id="LC628" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC629" class="line" lang="c"> <span class="n" style="color: #333;">action</span><span class="p">.</span><span class="n" style="color: #333;">sa_handler</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">handle_tick</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC630" class="line" lang="c"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="666" 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="666" 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">@@ -666,7 +666,8 @@ install_vtalrm_handler(int sig, TickProc handle_tick)</td>
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<pre style="margin: 0;"> <span id="LC666" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span></span>
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<pre style="margin: 0;"> <span id="LC667" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">initDefaultHandlers</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">void</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC668" class="line" lang="c"><span class="p">{</span></span>
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<pre style="margin: 0;">-<span id="LC669" class="line" lang="c"> <span class="k" style="font-weight: 600;">struct</span> <span class="n" style="color: #333;">sigaction</span> <span class="n" style="color: #333;">action</span><span class="p">,</span><span class="n" style="color: #333;">oact</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC669" class="line" lang="c"> <span class="k" style="font-weight: 600;">struct</span> <span class="n" style="color: #333;">sigaction</span> <span class="n" style="color: #333;">action</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">{};</span></span>
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<pre style="margin: 0;">+<span id="LC670" class="line" lang="c"> <span class="k" style="font-weight: 600;">struct</span> <span class="n" style="color: #333;">sigaction</span> <span class="n" style="color: #333;">oact</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">{};</span></span>
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<pre style="margin: 0;"> <span id="LC671" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC672" class="line" lang="c"> <span class="c1" style="color: #998; font-style: italic;">// install the SIGINT handler</span></span>
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<pre style="margin: 0;"> <span id="LC673" class="line" lang="c"> <span class="n" style="color: #333;">action</span><span class="p">.</span><span class="n" style="color: #333;">sa_handler</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">shutdown_handler</span><span class="p">;</span></span>
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