[#llvm-runOnNewStack-07]
= xref:llvm.adoc[llvm]::runOnNewStack
:relfileprefix: ../
:mrdocs:

Runs Fn on a new stack of at least the given size.

== Synopsis

Declared in `<llvm/Support/ProgramStack.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
runOnNewStack(
    unsigned int StackSize,
    xref:llvm/function_ref-03.adoc[function_ref<void()>] Fn);
----

== Description

The preferred implementation is split stacks on platforms that have a good debugging experience for them. On other platforms a new thread is used.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *StackSize*
| requested stack size. A size of 0 uses the default stack size of the platform.
| *Fn*
| callable to run on the new stack.
|===


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