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Fix assert when VMA_DEBUG_INITIALIZE_ALLOCATIONS is used with new memory usage flags

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Only mappable allocations are filled with bit pattern.

See #260
This commit is contained in:
Adam Sawicki 2022-04-27 16:58:56 +02:00
parent 7de5cc00de
commit 5ab8c1752a
2 changed files with 5 additions and 4 deletions
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4
docs/html/debugging_memory_usage.html
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@ -76,9 +76,9 @@ Memory initialization</h1>
<div class="fragment"><div class="line"><span class="preprocessor">#define VMA_DEBUG_INITIALIZE_ALLOCATIONS 1</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a>&quot;</span></div>
<div class="ttc" id="avk__mem__alloc_8h_html"><div class="ttname"><a href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a></div></div>
</div><!-- fragment --><p >It makes memory of all new allocations initialized to bit pattern <code>0xDCDCDCDC</code>. Before an allocation is destroyed, its memory is filled with bit pattern <code>0xEFEFEFEF</code>. Memory is automatically mapped and unmapped if necessary.</p>
</div><!-- fragment --><p >It makes memory of new allocations initialized to bit pattern <code>0xDCDCDCDC</code>. Before an allocation is destroyed, its memory is filled with bit pattern <code>0xEFEFEFEF</code>. Memory is automatically mapped and unmapped if necessary.</p>
<p >If you find these values while debugging your program, good chances are that you incorrectly read Vulkan memory that is allocated but not initialized, or already freed, respectively.</p>
<p >Memory initialization works only with memory types that are <code>HOST_VISIBLE</code>. It works also with dedicated allocations.</p>
<p >Memory initialization works only with memory types that are <code>HOST_VISIBLE</code> and with allocations that can be mapped. It works also with dedicated allocations.</p>
<h1><a class="anchor" id="debugging_memory_usage_margins"></a>
Margins</h1>
<p >By default, allocations are laid out in memory blocks next to each other if possible (considering required alignment, <code>bufferImageGranularity</code>, and <code>nonCoherentAtomSize</code>).</p>