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<a href='https://github.com/akkartik/mu/blob/master/subx/037heap.cc'>https://github.com/akkartik/mu/blob/master/subx/037heap.cc</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Support for dynamic allocation.</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment">//:</span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment">//: Just provide a special label marking the first unused address in the data</span>
<span id="L4" class="LineNr"> 4 </span><span class="Comment">//: segment. Then we'll write SubX helpers to make use of it.</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="Delimiter">:(before "Begin rewrite_global_variables")</span>
<span id="L7" class="LineNr"> 7 </span><a href='037heap.cc.html#L9'>insert_heap_global_variable</a><span class="Delimiter">(</span>p<span class="Delimiter">);</span>
<span id="L8" class="LineNr"> 8 </span><span class="Delimiter">:(code)</span>
<span id="L9" class="LineNr"> 9 </span><span class="Normal">void</span> <a href='037heap.cc.html#L9'>insert_heap_global_variable</a><span class="Delimiter">(</span>program& p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L10" class="LineNr">10 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L166'>SIZE</a><span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">)</span> < <span class="Constant">2</span><span class="Delimiter">)</span>
<span id="L11" class="LineNr">11 </span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Comment">// no data segment defined</span>
<span id="L12" class="LineNr">12 </span> <span class="Comment">// Start-of-heap:</span>
<span id="L13" class="LineNr">13 </span> p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span><a href='011run.cc.html#L109'>lines</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>label<span class="Delimiter">(</span><span class="Constant">"Start-of-heap"</span><span class="Delimiter">));</span>
<span id="L14" class="LineNr">14 </span><span class="Delimiter">}</span>
<span id="L15" class="LineNr">15 </span>
<span id="L16" class="LineNr">16 </span><a href='011run.cc.html#L117'>line</a> label<span class="Delimiter">(</span>string s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L17" class="LineNr">17 </span> <a href='011run.cc.html#L117'>line</a> result<span class="Delimiter">;</span>
<span id="L18" class="LineNr">18 </span> result<span class="Delimiter">.</span><a href='011run.cc.html#L118'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='011run.cc.html#L123'>word</a><span class="Delimiter">());</span>
<span id="L19" class="LineNr">19 </span> result<span class="Delimiter">.</span><a href='011run.cc.html#L118'>words</a><span class="Delimiter">.</span>back<span class="Delimiter">().</span>data = <span class="Delimiter">(</span>s+<span class="Constant">":"</span><span class="Delimiter">);</span>
<span id="L20" class="LineNr">20 </span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L21" class="LineNr">21 </span><span class="Delimiter">}</span>
<span id="L22" class="LineNr">22 </span>
<span id="L23" class="LineNr">23 </span><a href='011run.cc.html#L117'>line</a> <a href='037heap.cc.html#L23'>imm32</a><span class="Delimiter">(</span><span class="Normal">const</span> string& s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L24" class="LineNr">24 </span> <a href='011run.cc.html#L117'>line</a> result<span class="Delimiter">;</span>
<span id="L25" class="LineNr">25 </span> result<span class="Delimiter">.</span><a href='011run.cc.html#L118'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='011run.cc.html#L123'>word</a><span class="Delimiter">());</span>
<span id="L26" class="LineNr">26 </span> result<span class="Delimiter">.</span><a href='011run.cc.html#L118'>words</a><span class="Delimiter">.</span>back<span class="Delimiter">().</span>data = s<span class="Delimiter">;</span>
<span id="L27" class="LineNr">27 </span> result<span class="Delimiter">.</span><a href='011run.cc.html#L118'>words</a><span class="Delimiter">.</span>back<span class="Delimiter">().</span>metadata<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><span class="Constant">"imm32"</span><span class="Delimiter">);</span>
<span id="L28" class="LineNr">28 </span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L29" class="LineNr">29 </span><span class="Delimiter">}</span>
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