[#absl-internal_stacktrace-FixUpStack]
= xref:absl.adoc[absl]::xref:absl/internal_stacktrace.adoc[internal_stacktrace]::FixUpStack
:relfileprefix: ../../
:mrdocs:

Fixes up the stack trace of the current thread, in the first `depth` frames of each buffer. The buffers need to be larger than `depth`, to accommodate any newly inserted elements. `depth` is updated to reflect the new number of elements valid across all the buffers. (It is therefore recommended that all buffer sizes be equal.)

== Synopsis

Declared in `<absl/debugging/stacktrace.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
extern
void
FixUpStack(
    void** pcs,
    uintptr_t* frames,
    int* sizes,
    size_t capacity,
    size_t& depth);
----

== Description

The `frames` and `sizes` parameters denote the bounds of the stack frame corresponding to each instruction pointer in the `pcs`. Any elements inside these buffers may be zero or null, in which case that information is assumed to be absent/unavailable.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pcs*
| Buffer of program counter values to fix up.
| *frames*
| Buffer of stack frame bounds corresponding to each entry in `pcs`.
| *sizes*
| Buffer of stack frame sizes corresponding to each entry in `pcs`.
| *capacity*
| Capacity of the `pcs`, `frames`, and `sizes` buffers.
| *depth*
| Number of valid elements on input; updated to the new number of valid elements.
|===


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