[#llvm-GetShadowBytes]
= xref:llvm.adoc[llvm]::GetShadowBytes
:relfileprefix: ../
:mrdocs:

Return shadow bytes for a stack frame with all locals in scope.

== Synopsis

Declared in `<llvm/Transforms/Utils/ASanStackFrameLayout.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:llvm/SmallVector-06.adoc[SmallVector<uint8_t, 64>]
GetShadowBytes(
    xref:llvm/SmallVectorImpl-06c.adoc[SmallVectorImpl<ASanStackVariableDescription>] const& Vars,
    xref:llvm/ASanStackFrameLayout.adoc[ASanStackFrameLayout] const& Layout);
----

== Description

Redzones are marked with AddressSanitizer magic values. This shadow represents the state of the stack frame when all local variables are inside their own scope.

== Return Value

Shadow bytes with redzones marked and in‐scope locals as valid.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *Vars*
| Stack variables after layout has been computed.
| *Layout*
| Computed frame layout that supplies granularity and size.
|===


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