[stacktrace.general]

# 19 Diagnostics library [[diagnostics]](./#diagnostics)

## 19.6 Stacktrace [[stacktrace]](stacktrace#general)

### 19.6.1 General [stacktrace.general]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L1651)

Subclause [[stacktrace]](stacktrace "19.6 Stacktrace") describes components
that C++ programs may use to store
the stacktrace of the current thread of execution and
query information about the stored stacktrace at runtime[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L1657)

The [*invocation sequence*](#def:invocation_sequence "19.6.1 General [stacktrace.general]") of the current evaluation x0 in the current thread of execution
is a sequence (x0,…,xn) of evaluations such that, for i ≥ 0,xi is within the function invocation xi+1 ([[intro.execution]](intro.execution "6.10.1 Sequential execution"))[.](#2.sentence-1)

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/diagnostics.tex#L1663)

A [*stacktrace*](#def:stacktrace "19.6.1 General [stacktrace.general]") is an approximate representation of
an invocation sequence and consists of stacktrace entries[.](#3.sentence-1)

A [*stacktrace entry*](#def:stacktrace_entry "19.6.1 General [stacktrace.general]") represents an evaluation in a stacktrace[.](#3.sentence-2)