[libcamera-devel] [PATCH v1 0/4] libcamera: Improve backtraces

[Laurent Pinchart]

Hello,

This patch series improves backtrace generation. It stems from an effort
to implement a FileDescriptor leak tracker, and I'm posting it
separately because it's useful on its own.

Patch 1/4 extracts the backtrace generation code from the logger to a
new Backtrace class. The class allows capturing a backtrace (in a way
that is as lightweight as possible), and later formatting it in a
human-readable form (which can be more expensive). Backtrace instances
can thus be created relatively frequently and stored for possible later
usage.

Patches 2/4 to 4/4 then improve the Backtrace class to use libdw and/or
libunwind when available. libunwind provides both backtrace capture and
backtrace formatting capabilities, while libdw provides the latter only,
but with support for more detailed information. In both cases C++ symbol
names can now be demangled.

libdw and libunwind are optional dependencies, they will be used
automatically if found.

Laurent Pinchart (4):
  libcamera: base: Add Backtrace class
  libcamera: base: backtrace: Use libdw to provide symbolic names
  libcamera: base: backtrace: Use libunwind when available
  libcamera: base: backtrace: Fallback to libunwind for symbolic names

 include/libcamera/base/backtrace.h |  38 ++++
 include/libcamera/base/meson.build |   1 +
 meson.build                        |   4 -
 src/libcamera/base/backtrace.cpp   | 317 +++++++++++++++++++++++++++++
 src/libcamera/base/log.cpp         |  25 +--
 src/libcamera/base/meson.build     |  18 ++
 6 files changed, 380 insertions(+), 23 deletions(-)
 create mode 100644 include/libcamera/base/backtrace.h
 create mode 100644 src/libcamera/base/backtrace.cpp


base-commit: 6942fb11cc01ad7d5484b52963d15861d6ca4f2a
-- 
Regards,

Laurent Pinchart