Landing: 81c78a0349a2

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Project / Subsystem

gcc / libbacktrace

Date

2026-08-31

Author

Ian Lance Taylor

Commit

81c78a0349a221c98a5d8cc83bd44a2bbbd31c15

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: libbacktrace
patch_id: —
commit_hash: 81c78a0349a221c98a5d8cc83bd44a2bbbd31c15
source_type: github
headline: Report decl_lineno with MOREDATA in libbacktrace.
tldr: Improved stack unwinding to include declaration line numbers for inlined functions.
author: Ian Lance Taylor
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • debugging
• dwarf
• libbacktrace
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/81c78a0349a221c98a5d8cc83bd44a2bbbd31c15
date: 2026-08-31T00:00:00.000Z

The libbacktrace library now reports the declaration line number for inlined functions, enhancing debugging information. This change adds a new field backtrace_decl_lineno to the backtrace_moredata structure and updates DWARF parsing logic to extract and provide this information. The corresponding test cases in mdtest.c are adjusted to verify the correctness of this new data, making it easier to pinpoint the source of inlined code.