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Handle new HashMap layout in CDB, MSVC, WinDbg, etc. #1

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Merged
merged 1 commit into from
Jul 16, 2020
Merged

Handle new HashMap layout in CDB, MSVC, WinDbg, etc. #1

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35 changes: 4 additions & 31 deletions src/etc/natvis/libstd.natvis
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@
<Expand>
<Item Name="[size]">base.table.items</Item>
<Item Name="[capacity]">base.table.items + base.table.growth_left</Item>
<Item Name="[state]">base.hash_builder</Item>

<CustomListItems>
<Variable Name="i" InitialValue="0" />
Expand All @@ -40,7 +41,7 @@
<If Condition="(base.table.ctrl.pointer[i] &amp; 0x80) == 0">
<!-- Bucket is populated -->
<Exec>n--</Exec>
<Item Name="{base.table.data.pointer[i].__0}">base.table.data.pointer[i].__1</Item>
<Item Name="{static_cast&lt;tuple&lt;$T1, $T2&gt;*&gt;(base.table.ctrl.pointer)[-(i + 1)].__0}">static_cast&lt;tuple&lt;$T1, $T2&gt;*&gt;(base.table.ctrl.pointer)[-(i + 1)].__1</Item>
</If>
<Exec>i++</Exec>
</Loop>
Expand All @@ -53,6 +54,7 @@
<Expand>
<Item Name="[size]">map.base.table.items</Item>
<Item Name="[capacity]">map.base.table.items + map.base.table.growth_left</Item>
<Item Name="[state]">map.base.hash_builder</Item>

<CustomListItems>
<Variable Name="i" InitialValue="0" />
Expand All @@ -63,36 +65,7 @@
<If Condition="(map.base.table.ctrl.pointer[i] &amp; 0x80) == 0">
<!-- Bucket is populated -->
<Exec>n--</Exec>
<Item>map.base.table.data.pointer[i].__0</Item>
</If>
<Exec>i++</Exec>
</Loop>
</CustomListItems>
</Expand>
</Type>

<Type Name="hashbrown::raw::RawTable&lt;*&gt;">
<!-- RawTable has a nice and simple layout.
items Number of *populated* values in the RawTable (less than the size of ctrl.pointer / data.pointer)
growth_left Remaining capacity before growth
ctrl.pointer[i] & 0x80 Indicates the bucket is empty / should be skipped / doesn't count towards items.
data.pointer[i] The (K,V) tuple, if not empty.
-->
<DisplayString>{{ size={items} }}</DisplayString>
<Expand>
<Item Name="[size]">items</Item>
<Item Name="[capacity]">items + growth_left</Item>

<CustomListItems>
<Variable Name="i" InitialValue="0" />
<Variable Name="n" InitialValue="items" />
<Size>items</Size>
<Loop>
<Break Condition="n == 0" />
<If Condition="(ctrl.pointer[i] &amp; 0x80) == 0">
<!-- Bucket is populated -->
<Exec>n--</Exec>
<Item>data.pointer[i]</Item>
<Item>static_cast&lt;$T1*&gt;(map.base.table.ctrl.pointer)[-(i + 1)]</Item>
</If>
<Exec>i++</Exec>
</Loop>
Expand Down