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<h3>
Sven Tennie pushed to branch wip/stack_cloning
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/31272415c6286ca0af812bdbc72504e28df6def6">31272415</a></strong>
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<span>by Sven Tennie</span>
<i>at 2020-10-11T18:13:16+02:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix MVar putting and implement tests
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<h4>9 changed files:</h4>
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<li class="file-stats">
<a href="#9cc5887db9e4af2e8d686d9953728d48fd50dd64">
libraries/base/GHC/Stack/CloneStack.hs
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<li class="file-stats">
<a href="#864e56410efaa16e354282a06a222376524fc186">
rts/CloneStack.c
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<li class="file-stats">
<a href="#b0baad6a4b3ea9e8bb4438f46afb74f1ca6f5638">
rts/CloneStack.h
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<li class="file-stats">
<a href="#2ab80221ce99aa96a346b29d4e98230cf4d915a7">
rts/package.conf.in
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<li class="file-stats">
<a href="#e432c7b248b68100c3cc37db36ee80d975efd697">
rts/rts.cabal.in
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<li class="file-stats">
<a href="#5ced844c5529162410276a1236ca9b8e7186490c">
testsuite/tests/rts/all.T
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<li class="file-stats">
<a href="#67df7943ba73891a07f3727afc5a3069c29051ac">
testsuite/tests/rts/cloneMyStack.hs
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<li class="file-stats">
<a href="#da2af4490eb0e17c0307765ca5e1be1ca9b978ee">
testsuite/tests/rts/cloneStackLib.c
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<li class="file-stats">
<a href="#60f10ee48feb16d809a4eccfe717c69d79799369">
testsuite/tests/rts/cloneThreadStack.hs
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<h4>Changes:</h4>
<li id="9cc5887db9e4af2e8d686d9953728d48fd50dd64">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#9cc5887db9e4af2e8d686d9953728d48fd50dd64"><strong>libraries/base/GHC/Stack/CloneStack.hs</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">@@ -21,6 +21,19 @@ foreign import ccall "sendCloneStackMessage" sendCloneStackMessage :: ThreadId#</td>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span> <span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span><span class="o" style="font-weight: 600;">#</span></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Stack Cloning]</span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">"Cloning" a stack means that it's StgStack closure is copied including the</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">stack memory (stack[]). The stack pointer (sp) of the clone is adjusted to be</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">valid.</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The clone is "offline"/"cold", i.e. it won't be evaluated any further. This is</span></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">useful for further analyses like stack unwinding or traversal.</span></span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There are two different ways to clone a stack:</span></span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. By the corresponding thread via a primop call (cloneMyStack#).</span></span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. By sending a RTS message (Messages.c) with a MVar to the corresponding</span></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> thread and receiving the stack by taking it out of this MVar.</span></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"><span class="cd">-- | Clone the stack of a thread identified by it's 'ThreadId'</span></span>
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<pre style="margin: 0;"> <span id="LC38" class="line" lang="haskell"><span class="n" style="color: #333;">cloneThreadStack</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ThreadId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span></span>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"><span class="n" style="color: #333;">cloneThreadStack</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ThreadId</span> <span class="n" style="color: #333;">tid</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</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">@@ -31,7 +44,6 @@ cloneThreadStack (ThreadId tid#) = do</td>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- into resultVar.</span></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"> <span class="n" style="color: #333;">sendCloneStackMessage</span> <span class="n" style="color: #333;">tid</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">ptr</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"> <span class="n" style="color: #333;">freeStablePtr</span> <span class="n" style="color: #333;">ptr</span></span>
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<pre style="margin: 0;">-<span id="LC34" class="line" lang="haskell"> <span class="n" style="color: #333;">print</span> <span class="s" style="color: #d14;">"takeMVar"</span></span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell"> <span class="n" style="color: #333;">takeMVar</span> <span class="n" style="color: #333;">resultVar</span></span>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"><span class="cd">-- | Clone the stack of the executing thread</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#864e56410efaa16e354282a06a222376524fc186"><strong>rts/CloneStack.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">@@ -27,7 +27,12 @@ void sendCloneStackMessage(StgTSO *tso, HsStablePtr mvar) {</td>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">handleCloneStackMessage</span><span class="p">(</span><span class="n" style="color: #333;">MessageCloneStack</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">msg</span><span class="p">){</span></span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="c"> <span class="n" style="color: #333;">StgStack</span><span class="o" style="font-weight: 600;">*</span> <span class="n" style="color: #333;">newStackClosure</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cloneStack</span><span class="p">(</span><span class="n" style="color: #333;">msg</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">tso</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">cap</span><span class="p">,</span> <span class="n" style="color: #333;">msg</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">tso</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stackobj</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC30" class="line" lang="c"> <span class="n" style="color: #333;">bool</span> <span class="n" style="color: #333;">putMVarWasSuccessful</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">performTryPutMVar</span><span class="p">(</span><span class="n" style="color: #333;">msg</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">tso</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">cap</span><span class="p">,</span> <span class="n" style="color: #333;">msg</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">result</span><span class="p">,</span> <span class="n" style="color: #333;">newStackClosure</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="c"> <span class="c1" style="color: #998; font-style: italic;">// Lift StackSnapshot# to StackSnapshot by applying it's constructor.</span></span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="c"> <span class="c1" style="color: #998; font-style: italic;">// This is necessary because performTryPutMVar() puts the closure onto the</span></span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="c"> <span class="c1" style="color: #998; font-style: italic;">// stack for evaluation and stacks can not be evaluated (entered).</span></span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="c"> <span class="n" style="color: #333;">HaskellObj</span> <span class="n" style="color: #333;">result</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rts_apply</span><span class="p">(</span><span class="n" style="color: #333;">msg</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">tso</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">cap</span><span class="p">,</span> <span class="n" style="color: #333;">StackSnapshot_constructor_closure</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">HaskellObj</span><span class="p">)</span> <span class="n" style="color: #333;">newStackClosure</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="c"> <span class="n" style="color: #333;">bool</span> <span class="n" style="color: #333;">putMVarWasSuccessful</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">performTryPutMVar</span><span class="p">(</span><span class="n" style="color: #333;">msg</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">tso</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">cap</span><span class="p">,</span> <span class="n" style="color: #333;">msg</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">result</span><span class="p">,</span> <span class="n" style="color: #333;">result</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">putMVarWasSuccessful</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;"> <span id="LC38" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"Can't put stack cloning result into MVar."</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">@@ -43,11 +48,6 @@ void sendCloneStackMessage(StgTSO *tso, HsStablePtr mvar) {</td>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#endif // end !defined(THREADED_RTS)</span></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="c"><span class="n" style="color: #333;">StgStack</span><span class="o" style="font-weight: 600;">*</span> <span class="nf" style="color: #900; font-weight: 600;">cloneStack</span><span class="p">(</span><span class="n" style="color: #333;">Capability</span><span class="o" style="font-weight: 600;">*</span> <span class="n" style="color: #333;">capability</span><span class="p">,</span> <span class="n" style="color: #333;">StgStack</span><span class="o" style="font-weight: 600;">*</span> <span class="n" style="color: #333;">stack</span><span class="p">){</span></span>
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<pre style="margin: 0;">-<span id="LC46" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#if defined(DEBUG)</span></span>
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47
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<pre style="margin: 0;">-<span id="LC47" class="line" lang="c"> <span class="n" style="color: #333;">debugBelch</span><span class="p">(</span><span class="s" style="color: #d14;">"Stack to clone</span><span class="se" style="color: #d14;">\n</span><span class="s" style="color: #d14;">"</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC48" class="line" lang="c"> <span class="n" style="color: #333;">printStack</span><span class="p">(</span><span class="n" style="color: #333;">stack</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC49" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#endif</span></span>
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<pre style="margin: 0;">-<span id="LC50" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="c"> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">spOffset</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">stack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">sp</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">stack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="c"> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">closureSizeBytes</span> <span class="o" style="font-weight: 600;">=</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="n" style="color: #333;">StgStack</span><span class="p">)</span> <span class="o" style="font-weight: 600;">+</span> <span class="p">(</span><span class="n" style="color: #333;">stack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack_size</span> <span class="o" style="font-weight: 600;">*</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="n" style="color: #333;">StgWord</span><span class="p">));</span></span>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="c"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="58" 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>
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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">@@ -58,9 +58,7 @@ StgStack* cloneStack(Capability* capability, StgStack* stack){</td>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="c"> <span class="n" style="color: #333;">newStackClosure</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">sp</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">newStackClosure</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">spOffset</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC60" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#if defined(DEBUG)</span></span>
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<pre style="margin: 0;">-<span id="LC61" class="line" lang="c"> <span class="n" style="color: #333;">debugBelch</span><span class="p">(</span><span class="s" style="color: #d14;">"Cloned stack</span><span class="se" style="color: #d14;">\n</span><span class="s" style="color: #d14;">"</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC62" class="line" lang="c"> <span class="n" style="color: #333;">printStack</span><span class="p">(</span><span class="n" style="color: #333;">newStackClosure</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC63" class="line" lang="c"> <span class="c1" style="color: #998; font-style: italic;">// TODO: Check sanity</span></span>
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<pre style="margin: 0;">+<span id="LC61" class="line" lang="c"> <span class="n" style="color: #333;">checkClosure</span><span class="p">(</span><span class="n" style="color: #333;">newStackClosure</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC62" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#endif</span></span>
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<pre style="margin: 0;"> <span id="LC63" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="n" style="color: #333;">newStackClosure</span><span class="p">;</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#b0baad6a4b3ea9e8bb4438f46afb74f1ca6f5638"><strong>rts/CloneStack.h</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">@@ -7,3 +7,6 @@ void handleCloneStackMessage(MessageCloneStack *msg);</td>
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<pre style="margin: 0;"> <span id="LC7" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">sendCloneStackMessage</span><span class="p">(</span><span class="n" style="color: #333;">StgTSO</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">tso</span><span class="p">,</span> <span class="n" style="color: #333;">HsStablePtr</span> <span class="n" style="color: #333;">mvar</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC8" class="line" lang="c"></span>
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9
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="c"><span class="n" style="color: #333;">StgStack</span><span class="o" style="font-weight: 600;">*</span> <span class="nf" style="color: #900; font-weight: 600;">cloneStack</span><span class="p">(</span><span class="n" style="color: #333;">Capability</span><span class="o" style="font-weight: 600;">*</span> <span class="n" style="color: #333;">capability</span><span class="p">,</span> <span class="n" style="color: #333;">StgStack</span><span class="o" style="font-weight: 600;">*</span> <span class="n" style="color: #333;">stack</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="c"><span class="k" style="font-weight: 600;">extern</span> <span class="n" style="color: #333;">StgClosure</span> <span class="nf" style="color: #900; font-weight: 600;">DLL_IMPORT_DATA_VARNAME</span><span class="p">(</span><span class="n" style="color: #333;">base_GHCziStackziCloneStack_StackSnapshot_closure</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define StackSnapshot_constructor_closure DLL_IMPORT_DATA_REF(base_GHCziStackziCloneStack_StackSnapshot_closure)</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#2ab80221ce99aa96a346b29d4e98230cf4d915a7"><strong>rts/package.conf.in</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">@@ -194,6 +194,7 @@ ld-options:</td>
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<pre style="margin: 0;"> <span id="LC194" class="line" lang="plaintext"> * so we need to force it to be included in the binary. */</span>
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<pre style="margin: 0;"> <span id="LC195" class="line" lang="plaintext"> , "-Wl,-u,_findPtr"</span>
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<pre style="margin: 0;"> <span id="LC196" class="line" lang="plaintext">#endif</span>
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<pre style="margin: 0;">+<span id="LC197" class="line" lang="plaintext"> , "-Wl,-u,_base_GHCziStackziCloneStack_StackSnapshot_closure"</span>
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<pre style="margin: 0;"> <span id="LC198" class="line" lang="plaintext">#else</span>
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<pre style="margin: 0;"> <span id="LC199" class="line" lang="plaintext"> "-Wl,-u,base_GHCziTopHandler_runIO_closure"</span>
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<pre style="margin: 0;"> <span id="LC200" class="line" lang="plaintext"> , "-Wl,-u,base_GHCziTopHandler_runNonIO_closure"</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">@@ -308,6 +309,7 @@ ld-options:</td>
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<pre style="margin: 0;"> <span id="LC309" class="line" lang="plaintext"> * so we need to force it to be included in the binary. */</span>
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<pre style="margin: 0;"> <span id="LC310" class="line" lang="plaintext"> , "-Wl,-u,findPtr"</span>
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<pre style="margin: 0;"> <span id="LC311" class="line" lang="plaintext">#endif</span>
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<pre style="margin: 0;">+<span id="LC312" class="line" lang="plaintext"> , "-Wl,-u,base_GHCziStackziCloneStack_StackSnapshot_closure"</span>
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<pre style="margin: 0;"> <span id="LC313" class="line" lang="plaintext">#endif</span>
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<pre style="margin: 0;"> <span id="LC314" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC315" class="line" lang="plaintext">/* Pick up static libraries in preference over dynamic if in earlier search</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#e432c7b248b68100c3cc37db36ee80d975efd697"><strong>rts/rts.cabal.in</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">@@ -286,6 +286,7 @@ library</td>
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286
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286
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<pre style="margin: 0;"> <span id="LC286" class="line" lang="plaintext"> "-Wl,-u,_hs_atomicwrite8"</span>
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287
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287
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<pre style="margin: 0;"> <span id="LC287" class="line" lang="plaintext"> "-Wl,-u,_hs_atomicwrite16"</span>
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288
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288
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<pre style="margin: 0;"> <span id="LC288" class="line" lang="plaintext"> "-Wl,-u,_hs_atomicwrite32"</span>
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289
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<pre style="margin: 0;">+<span id="LC289" class="line" lang="plaintext"> "-Wl,-u,_base_GHCziStackziCloneStack_StackSnapshot_closure"</span>
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289
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290
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<pre style="margin: 0;"> <span id="LC290" class="line" lang="plaintext"></span>
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290
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291
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<pre style="margin: 0;"> <span id="LC291" class="line" lang="plaintext"> if flag(find-ptr)</span>
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291
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292
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<pre style="margin: 0;"> <span id="LC292" class="line" lang="plaintext"> -- This symbol is useful in gdb, but not referred to anywhere,</span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="367" 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>
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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">@@ -367,6 +368,7 @@ library</td>
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367
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368
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<pre style="margin: 0;"> <span id="LC368" class="line" lang="plaintext"> "-Wl,-u,hs_atomicwrite8"</span>
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368
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369
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<pre style="margin: 0;"> <span id="LC369" class="line" lang="plaintext"> "-Wl,-u,hs_atomicwrite16"</span>
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370
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<pre style="margin: 0;"> <span id="LC370" class="line" lang="plaintext"> "-Wl,-u,hs_atomicwrite32"</span>
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371
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<pre style="margin: 0;">+<span id="LC371" class="line" lang="plaintext"> "-Wl,-u,base_GHCziStackziCloneStack_StackSnapshot_closure"</span>
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370
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372
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<pre style="margin: 0;"> <span id="LC372" class="line" lang="plaintext"></span>
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373
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<pre style="margin: 0;"> <span id="LC373" class="line" lang="plaintext"> if flag(find-ptr)</span>
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374
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<pre style="margin: 0;"> <span id="LC374" class="line" lang="plaintext"> -- This symbol is useful in gdb, but not referred to anywhere,</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#5ced844c5529162410276a1236ca9b8e7186490c"><strong>testsuite/tests/rts/all.T</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">@@ -419,6 +419,6 @@ test('T17088',</td>
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419
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<pre style="margin: 0;"> <span id="LC419" class="line" lang="perl"></span>
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420
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<pre style="margin: 0;"> <span id="LC420" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T15427</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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421
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421
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<pre style="margin: 0;"> <span id="LC421" class="line" lang="perl"></span>
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422
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<pre style="margin: 0;">-<span id="LC422" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">cloneMyStack</span><span class="p">',</span> <span class="p">[</span><span class="nv" style="color: #008080;">extra_files</span><span class="p">(['</span><span class="s1" style="color: #d14;">cloneStackLib.c</span><span class="p">'])],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">cloneStackLib.c<span class="idiff left right"> -debug</span></span><span class="p">'])</span></span>
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422
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<pre style="margin: 0;">+<span id="LC422" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">cloneMyStack</span><span class="p">',</span> <span class="p">[</span><span class="nv" style="color: #008080;">extra_files</span><span class="p">(['</span><span class="s1" style="color: #d14;">cloneStackLib.c</span><span class="p">'])],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">cloneStackLib.c</span><span class="p">'])</span></span>
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423
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423
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<pre style="margin: 0;"> <span id="LC423" class="line" lang="perl"></span>
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<pre style="margin: 0;">-<span id="LC424" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">cloneThreadStack</span><span class="p">',</span> <span class="p">[</span><span class="nv" style="color: #008080;">only_ways</span><span class="p">(['</span><span class="s1" style="color: #d14;">threaded1</span><span class="p">']),</span> <span class="nv" style="color: #008080;">extra_ways</span><span class="p">(['</span><span class="s1" style="color: #d14;">threaded1</span><span class="p">']),</span> <span class="nv" style="color: #008080;">extra_files</span><span class="p">(['</span><span class="s1" style="color: #d14;">cloneStackLib.c</span><span class="p">'])],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">cloneStackLib.c -<span class="idiff left right">debug -</span>threaded</span><span class="p">'])</span></span></pre>
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<pre style="margin: 0;">+<span id="LC424" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">cloneThreadStack</span><span class="p">',</span> <span class="p">[</span><span class="nv" style="color: #008080;">only_ways</span><span class="p">(['</span><span class="s1" style="color: #d14;">threaded1</span><span class="p">']),</span> <span class="nv" style="color: #008080;">extra_ways</span><span class="p">(['</span><span class="s1" style="color: #d14;">threaded1</span><span class="p">']),</span> <span class="nv" style="color: #008080;">extra_files</span><span class="p">(['</span><span class="s1" style="color: #d14;">cloneStackLib.c</span><span class="p">'])],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">cloneStackLib.c -threaded</span><span class="p">'])</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#67df7943ba73891a07f3727afc5a3069c29051ac"><strong>testsuite/tests/rts/cloneMyStack.hs</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">@@ -4,11 +4,17 @@</td>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"></span>
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5
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Prim</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>
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6
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6
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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Stack.CloneStack</span></span>
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7
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Foreign</span></span>
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8
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Foreign.C.Types</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CUInt</span><span class="p">)</span></span>
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7
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9
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC8" class="line" lang="haskell"><span class="n" style="color: #333;">foreign</span> <span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">ccall</span> <span class="s" style="color: #d14;">"<span class="idiff left">printy"</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">printStack</span></span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">StackSnapshot</span></span><span class="o" style="font-weight: 600;"><span class="idiff right">#</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">foreign</span> <span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">ccall</span> <span class="s" style="color: #d14;">"<span class="idiff left">expectClosureTypes"</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">expectClosureTypes</span></span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">StackSnapshot</span></span><span class="o" style="font-weight: 600;"><span class="idiff">#</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Ptr</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CUInt</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Int</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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9
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11
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"></span>
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12
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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11
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13
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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12
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14
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"> <span class="n" style="color: #333;">stackSnapshot</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">cloneMyStack</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"></span>
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13
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span> <span class="n" style="color: #333;">stack</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">stackSnapshot</span></span>
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14
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<pre style="margin: 0;">-<span id="LC14" class="line" lang="haskell"> <span class="n" style="color: #333;">printStack</span> <span class="n" style="color: #333;">stack</span></span></pre>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">expectedClosureTypes</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="mi" style="color: #099;">34</span> <span class="c1" style="color: #998; font-style: italic;">-- CATCH_FRAME</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"> <span class="p">,</span><span class="mi" style="color: #099;">36</span> <span class="c1" style="color: #998; font-style: italic;">-- STOP_FRAME</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"> <span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"> <span class="n" style="color: #333;">withArray</span> <span class="n" style="color: #333;">expectedClosureTypes</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">expectClosureTypes</span> <span class="n" style="color: #333;">stack</span> <span class="n" style="color: #333;">ptr</span> <span class="p">(</span><span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">expectedClosureTypes</span><span class="p">))</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#da2af4490eb0e17c0307765ca5e1be1ca9b978ee"><strong>testsuite/tests/rts/cloneStackLib.c</strong></a>
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<pre style="margin: 0;"> <span id="LC1" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#include "Rts.h"</span></span>
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<pre style="margin: 0;"> <span id="LC2" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#include "RtsAPI.h"</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#include "rts/Messages.h"</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC4" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">// TODO: Do not merge. Only exported for debugging.</span></span>
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<pre style="margin: 0;">-<span id="LC5" class="line" lang="c"><span class="k" style="font-weight: 600;">extern</span> <span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">printStack</span><span class="p">(</span> <span class="n" style="color: #333;">StgStack</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">stack</span> <span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC7" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">printy</span><span class="p">(</span><span class="n" style="color: #333;">StgStack</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">stack</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">-<span id="LC8" class="line" lang="c"> <span class="n" style="color: #333;">printStack</span><span class="p">(</span><span class="n" style="color: #333;">stack</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">checkClonedStack</span><span class="p">(</span><span class="n" style="color: #333;">StgStack</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">clonedStack</span><span class="p">,</span> <span class="n" style="color: #333;">StgTSO</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">tso</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="c"> <span class="n" style="color: #333;">StgStack</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">liveStack</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tso</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stackobj</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">header</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;">clonedStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">header</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="LC10" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"info table pointer not equal! Expected same pointer address, but got %p and %p"</span><span class="p">,</span> <span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">header</span><span class="p">.</span><span class="n" style="color: #333;">info</span><span class="p">,</span> <span class="n" style="color: #333;">clonedStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">header</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="LC11" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="c"> <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="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;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">header</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="LC14" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</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="o" style="font-weight: 600;">!=</span> <span class="n" style="color: #333;">STACK</span><span class="p">)</span> <span class="p">{</span></span>
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<td class="diff-line-num new new_line" data-linenumber="16" 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">
16
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"Expected a closure of type STACK!"</span><span class="p">);</span></span>
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<td class="diff-line-num new new_line" data-linenumber="17" 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">
17
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="c"> <span class="p">}</span></span>
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18
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="c"></span>
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<td class="diff-line-num new new_line" data-linenumber="19" 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">
19
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack_size</span> <span class="o" style="font-weight: 600;">!=</span> <span class="n" style="color: #333;">clonedStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack_size</span><span class="p">){</span></span>
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<td class="diff-line-num new new_line" data-linenumber="20" 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">
20
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"Expected same stack_size!"</span><span class="p">);</span></span>
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21
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="c"> <span class="p">}</span></span>
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<td class="diff-line-num new new_line" data-linenumber="22" 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">
22
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="c"></span>
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<td class="diff-line-num new new_line" data-linenumber="23" 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">
23
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">dirty</span> <span class="o" style="font-weight: 600;">!=</span> <span class="n" style="color: #333;">clonedStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">dirty</span><span class="p">){</span></span>
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<td class="diff-line-num new new_line" data-linenumber="24" 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">
24
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"Expected same dirty flags!"</span><span class="p">);</span></span>
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25
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="c"> <span class="p">}</span></span>
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26
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="c"></span>
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<td class="diff-line-num new new_line" data-linenumber="27" 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">
27
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">marking</span> <span class="o" style="font-weight: 600;">!=</span> <span class="n" style="color: #333;">clonedStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">marking</span><span class="p">){</span></span>
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<td class="diff-line-num new new_line" data-linenumber="28" 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">
28
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"Expected same marking flags!"</span><span class="p">);</span></span>
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29
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="c"> <span class="p">}</span></span>
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30
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="c"></span>
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<td class="diff-line-num new new_line" data-linenumber="31" 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">
31
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="c"> <span class="k" style="font-weight: 600;">for</span><span class="p">(</span><span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack_size</span> <span class="o" style="font-weight: 600;">-</span> <span class="mi" style="color: #099;">1</span><span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">>=</span> <span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">sp</span><span class="p">;</span> <span class="n" style="color: #333;">i</span><span class="o" style="font-weight: 600;">--</span><span class="p">){</span></span>
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<td class="diff-line-num new new_line" data-linenumber="32" 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">
32
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="n" style="color: #333;">liveStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">]</span> <span class="o" style="font-weight: 600;">!=</span> <span class="n" style="color: #333;">clonedStack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">]){</span></span>
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<td class="diff-line-num new new_line" data-linenumber="33" 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">
33
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"Expected stack word %lu to be equal on both stacks."</span><span class="p">,</span> <span class="n" style="color: #333;">i</span><span class="p">);</span></span>
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34
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="c"> <span class="p">}</span></span>
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35
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="c"> <span class="p">}</span></span>
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36
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="c"><span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">expectClosureTypes</span><span class="p">(</span><span class="n" style="color: #333;">StgStack</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">stack</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="n" style="color: #333;">types</span><span class="p">[],</span> <span class="kt" style="color: #458; font-weight: 600;">size_t</span> <span class="n" style="color: #333;">typesSize</span><span class="p">){</span></span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="c"> <span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">sp</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">stack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">sp</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="c"> <span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">spBottom</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">stack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">stack</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stack_size</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="c"> <span class="k" style="font-weight: 600;">for</span> <span class="p">(</span><span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">0</span><span class="p">;</span> <span class="n" style="color: #333;">sp</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">spBottom</span><span class="p">;</span> <span class="n" style="color: #333;">sp</span> <span class="o" style="font-weight: 600;">+=</span> <span class="n" style="color: #333;">stack_frame_sizeW</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;">sp</span><span class="p">),</span> <span class="n" style="color: #333;">i</span><span class="o" style="font-weight: 600;">++</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="c"> <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="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">get_itbl</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;">sp</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC44" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC45" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span><span class="p">(</span><span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">>=</span> <span class="n" style="color: #333;">typesSize</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"Stack size exceeds expectation!"</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</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="o" style="font-weight: 600;">!=</span> <span class="n" style="color: #333;">types</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">])</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC50" class="line" lang="c"> <span class="n" style="color: #333;">barf</span><span class="p">(</span><span class="s" style="color: #d14;">"Wrong closure type on stack! Expected %u but got %u"</span><span class="p">,</span> <span class="n" style="color: #333;">types</span><span class="p">[</span><span class="n" style="color: #333;">i</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>
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<pre style="margin: 0;">+<span id="LC51" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC52" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="c"><span class="p">}</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31272415c6286ca0af812bdbc72504e28df6def6#60f10ee48feb16d809a4eccfe717c69d79799369"><strong>testsuite/tests/rts/cloneThreadStack.hs</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">@@ -2,22 +2,45 @@</td>
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<pre style="margin: 0;"> <span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE MagicHash #-}</span></span>
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UnliftedFFITypes #-}</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Prim</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Prim</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ThreadId</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Conc.Sync</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ThreadId</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Stack.CloneStack</span></span>
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<pre style="margin: 0;"> <span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Concurrent</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Conc</span></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC9" class="line" lang="haskell"><span class="n" style="color: #333;">foreign</span> <span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">ccall</span> <span class="s" style="color: #d14;">"<span class="idiff left">printy"</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">printStack</span></span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">StackSnapshot</span></span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">foreign</span> <span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">ccall</span> <span class="s" style="color: #d14;">"<span class="idiff left">checkClonedStack"</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">checkClonedStack</span></span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">StackSnapshot</span></span><span class="o" style="font-weight: 600;"><span class="idiff">#</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">ThreadId</span></span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"> <span class="n" style="color: #333;">mVarToBeBlockedOn</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newEmptyMVar</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"> <span class="n" style="color: #333;">threadId</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">forkIO</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">immediatelyBlocking</span> <span class="n" style="color: #333;">mVarToBeBlockedOn</span></span>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"> <span class="n" style="color: #333;">waitUntilBlocked</span> <span class="n" style="color: #333;">threadId</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"> <span class="n" style="color: #333;">stackSnapshot</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">cloneThreadStack</span> <span class="n" style="color: #333;">threadId</span></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StackSnapshot</span> <span class="n" style="color: #333;">stack</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">stackSnapshot</span></span>
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<pre style="margin: 0;">-<span id="LC18" class="line" lang="haskell"> <span class="n" style="color: #333;">printStack</span> <span class="n" style="color: #333;">stack</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ThreadId</span> <span class="n" style="color: #333;">tid</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">threadId</span></span>
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24
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"> <span class="n" style="color: #333;">checkClonedStack</span> <span class="n" style="color: #333;">stack</span> <span class="n" style="color: #333;">tid</span><span class="o" style="font-weight: 600;">#</span></span>
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25
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"></span>
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20
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26
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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"><span class="n" style="color: #333;">immediatelyBlocking</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MVar</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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21
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27
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="n" style="color: #333;">immediatelyBlocking</span> <span class="n" style="color: #333;">mVarToBeBlockedOn</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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22
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28
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"> <span class="n" style="color: #333;">takeMVar</span> <span class="n" style="color: #333;">mVarToBeBlockedOn</span></span>
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23
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29
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>
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30
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"><span class="n" style="color: #333;">waitUntilBlocked</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ThreadId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"><span class="n" style="color: #333;">waitUntilBlocked</span> <span class="n" style="color: #333;">tid</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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33
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"> <span class="n" style="color: #333;">blocked</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">isBlocked</span> <span class="n" style="color: #333;">tid</span></span>
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34
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">blocked</span> <span class="kr" style="font-weight: 600;">then</span></span>
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35
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>
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36
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span></span>
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37
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span></span>
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38
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"> <span class="n" style="color: #333;">threadDelay</span> <span class="mi" style="color: #099;">100000</span></span>
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39
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell"> <span class="n" style="color: #333;">waitUntilBlocked</span> <span class="n" style="color: #333;">tid</span></span>
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40
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="haskell"><span class="n" style="color: #333;">isBlocked</span><span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ThreadId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="haskell"><span class="n" style="color: #333;">isBlocked</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">isThreadStatusBlocked</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">threadStatus</span></span>
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43
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="haskell"></span>
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44
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<pre style="margin: 0;">+<span id="LC44" class="line" lang="haskell"><span class="n" style="color: #333;">isThreadStatusBlocked</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ThreadStatus</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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45
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<pre style="margin: 0;">+<span id="LC45" class="line" lang="haskell"><span class="n" style="color: #333;">isThreadStatusBlocked</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ThreadBlocked</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"><span class="n" style="color: #333;">isThreadStatusBlocked</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span></pre>
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