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backtrace: Strip the source tree prefix from filenames

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Display relative paths instead of absolute paths in backtrace output,
making the output cleaner and more portable across different build
environments.

This works by adding a SRCTREE define to lib/backtrace.c and stripping
it from filenames when printing.

Series-to: concept
Series-cc: heinrich
Cover-letter:
backtrace: Add runtime support for looking at the backtrace
In some cases the backtrace contains useful information, such as whether
a particular function was called earlier in the stack.

This series provides a very simple backtrace library, along with some
sandbox-specific functions to allow it to work. It is designed such that
another arch could implement it.

A new 'backtrace' command provides access to the backtrace.
END

Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
This commit is contained in:
Simon Glass
2025-11-28 06:51:08 -07:00
committed by Simon Glass
parent eb711c45ce
commit cee822e941
4 changed files with 32 additions and 11 deletions
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18
doc/usage/cmd/backtrace.rst
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@@ -29,15 +29,15 @@ Example
=> backtrace
backtrace: 14 addresses
backtrace_show() at /home/user/u-boot/lib/backtrace.c:17
do_backtrace() at /home/user/u-boot/cmd/backtrace.c:18
cmd_process() at /home/user/u-boot/common/command.c:637
run_list_real() at /home/user/u-boot/common/cli_hush.c:1868
parse_stream_outer() at /home/user/u-boot/common/cli_hush.c:3207
parse_string_outer() at /home/user/u-boot/common/cli_hush.c:3257
run_command_list() at /home/user/u-boot/common/cli.c:168
sandbox_main_loop_init() at /home/user/u-boot/arch/sandbox/cpu/start.c:153
board_init_r() at /home/user/u-boot/common/board_r.c:774
backtrace_show() at lib/backtrace.c:18
do_backtrace() at cmd/backtrace.c:17
cmd_process() at common/command.c:637
run_list_real() at common/cli_hush.c:1868
parse_stream_outer() at common/cli_hush.c:3207
parse_string_outer() at common/cli_hush.c:3257
run_command_list() at common/cli.c:168
sandbox_main_loop_init() at arch/sandbox/cpu/start.c:153
board_init_r() at common/board_r.c:774
...
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