Bug 191930

Summary:	Bring kernel debug files into line with userland standalone debug
Product:	Base System	Reporter:	Ed Maste <emaste>
Component:	misc	Assignee:	Ed Maste <emaste>
Status:	Open ---
Severity:	Affects Some People	CC:	avg, cem, op
Priority:	---
Version:	CURRENT
Hardware:	Any
OS:	Any
Bug Depends on:	191920
Bug Blocks:	231027

Description Ed Maste freebsd_committer

2014-07-17 20:06:14 UTC

A single src.conf(5) knob, WITH_DEBUG_FILES=yes, enables userland standalone debug.  Setting it enables a few things:

- CFLAGS has -g added to generate debug data during compilation
- Binaries and libraries are built as a .full version which includes debug
- The .full file is converted into one with the debug data stripped out (no extra extension), and a separate debug data file (.debug extension)
- Debug data is installed under /usr/lib/debug/...

Kernel standalone debug files have a few differences:

- The -g flag has to be added via the kernel config file (it is set in GENERIC)
- WITHOUT_KERNEL_SYMBOLS will avoid splitting the kernel objects
- Extensions are different (.debug for the full object, .symbols for the debug data)
- Debug data is installed in the same directory as the kernel objects, in /boot/kernel

The last point is an annoyance, as /boot may not be a very large filesystem

Comment 1 Ed Maste freebsd_committer

2015-11-24 16:53:57 UTC

As of r288176 these two are addressed:

- Extensions are different (.debug for the full object, .symbols for the debug data)
- Debug data is installed in the same directory as the kernel objects, in /boot/kernel

These two are still true today:

- The -g flag has to be added via the kernel config file (it is set in GENERIC)
- WITHOUT_KERNEL_SYMBOLS will avoid splitting the kernel objects

Comment 2 Ed Maste freebsd_committer

2018-08-30 16:49:46 UTC

Move to 13.x tracking PR. The changes that can be made in an existing branch or in-progress release (11.x/12.x) have been done. Any additional changes to be done in -CURRENT well in advance of a release.