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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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7
test/cmd/backtrace.c
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@@ -14,9 +14,14 @@
/* Test 'backtrace' command */
static int cmd_test_backtrace(struct unit_test_state *uts)
{
/* for now, just run the command */
ut_assertok(run_command("backtrace", 0));
ut_assert_nextlinen("backtrace:");
ut_assert_nextlinen(" backtrace_show() at lib/backtrace.c:");
ut_assert_nextlinen(" do_backtrace() at cmd/backtrace.c:");
ut_assert_nextlinen(" cmd_process() at common/command.c:");
ut_assert_skip_to_linen(" cmd_test_backtrace() at test/cmd/backtrace.c:");
return 0;
}
DM_TEST(cmd_test_backtrace, UTF_SCAN_FDT);