b174084ef9
Add a new 'backtrace' command which prints the current call stack, which is useful for debugging. The command is enabled by CONFIG_CMD_BACKTRACE Add docs and a test. Co-developed-by: Claude <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
52 lines
1.5 KiB
ReStructuredText
52 lines
1.5 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
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.. index::
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single: backtrace (command)
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backtrace command
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=================
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Synopsis
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--------
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::
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backtrace
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Description
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-----------
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The *backtrace* command prints a backtrace of the current call stack. This can
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be useful for debugging to see how a particular code path was reached.
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The output shows each stack frame with the function name, source file, and line
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number (when debug information is available). This includes static functions.
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Example
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-------
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::
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=> backtrace
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backtrace: 14 addresses
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backtrace_show() at /home/user/u-boot/lib/backtrace.c:17
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do_backtrace() at /home/user/u-boot/cmd/backtrace.c:18
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cmd_process() at /home/user/u-boot/common/command.c:637
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run_list_real() at /home/user/u-boot/common/cli_hush.c:1868
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parse_stream_outer() at /home/user/u-boot/common/cli_hush.c:3207
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parse_string_outer() at /home/user/u-boot/common/cli_hush.c:3257
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run_command_list() at /home/user/u-boot/common/cli.c:168
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sandbox_main_loop_init() at /home/user/u-boot/arch/sandbox/cpu/start.c:153
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board_init_r() at /home/user/u-boot/common/board_r.c:774
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...
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Configuration
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-------------
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The backtrace command is enabled by CONFIG_CMD_BACKTRACE which depends on
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CONFIG_BACKTRACE. Currently this is only available on sandbox.
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The sandbox implementation uses libbacktrace (bundled with GCC) to provide
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detailed symbol information including function names, source files, and line
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numbers.
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