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<h3>
Ömer Sinan Ağacan pushed to branch wip/osa1/std_string_thunks
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/f11545306dc083e14b104d2c0d7ef749dd6cb15a">f1154530</a></strong>
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<span>by Ömer Sinan Ağacan</span>
<i>at 2020-05-28T13:08:31+03:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Implement stack check
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<h4>1 changed file:</h4>
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rts/StgStdThunks.cmm
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<h4>Changes:</h4>
<li id="8f6de139b89115afef879fea7672c5e59f593077">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f11545306dc083e14b104d2c0d7ef749dd6cb15a#8f6de139b89115afef879fea7672c5e59f593077"><strong>rts/StgStdThunks.cmm</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">@@ -296,12 +296,18 @@ INFO_TABLE(stg_MK_STRING, 0, 1, THUNK_STATIC, "stg_MK_STRING", "stg_MK_STRING")</td>
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<pre style="margin: 0;"> <span id="LC296" class="line" lang="plaintext">{</span>
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<pre style="margin: 0;"> <span id="LC297" class="line" lang="plaintext"> W_ newCAF_ret;</span>
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<pre style="margin: 0;"> <span id="LC298" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC299" class="line" lang="plaintext"> // TODO (osa): Not sure why we do stack check before `newCAF`, but this is</span>
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<pre style="margin: 0;">+<span id="LC300" class="line" lang="plaintext"> // how `unpackCString# str` thunks are today.</span>
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<pre style="margin: 0;">+<span id="LC301" class="line" lang="plaintext"> if (Sp - WDS(2) < SpLim) {</span>
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<pre style="margin: 0;">+<span id="LC302" class="line" lang="plaintext"> jump stg_gc_enter_1(node);</span>
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<pre style="margin: 0;">+<span id="LC303" class="line" lang="plaintext"> }</span>
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<pre style="margin: 0;">+<span id="LC304" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC305" class="line" lang="plaintext"> (newCAF_ret) = ccall newCAF(BaseReg "ptr", node "ptr");</span>
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<pre style="margin: 0;"> <span id="LC306" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC307" class="line" lang="plaintext"> if (newCAF_ret == 0) {</span>
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<pre style="margin: 0;"> <span id="LC308" class="line" lang="plaintext"> jump node();</span>
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<pre style="margin: 0;"> <span id="LC309" class="line" lang="plaintext"> } else {</span>
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<pre style="margin: 0;">-<span id="LC304" class="line" lang="plaintext"> // <span class="idiff left right">TODO: Stack checks?</span></span>
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<pre style="margin: 0;">+<span id="LC310" class="line" lang="plaintext"> // <span class="idiff left right">Stack check done above</span></span>
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<pre style="margin: 0;"> <span id="LC311" class="line" lang="plaintext"> Sp_adj(-2);</span>
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<pre style="margin: 0;"> <span id="LC312" class="line" lang="plaintext"> Sp(1) = node;</span>
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<pre style="margin: 0;"> <span id="LC313" class="line" lang="plaintext"> Sp(0) = stg_bh_upd_frame_info;</span>
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