QEMU Time Travel Debugging#105
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This gitignores cscope database files and vim swap files. Since two members of UKO use cscope it is worth gitignoring, same with vim swap files. The cscope database can be regenerated from the repository, and swap files are temporary and should not be version controlled. It may be worth adding a cscope make target like the linux kernel has. Signed-off-by: arbormoss <arbormoss@woodsprite.dev>
This adds a make help target. If all supplied make targets are `help`, configuration is not required. This also makes running `make help` by itself faster, because it won't try to include the other Makefiles. HELP_TEXT is defined at the top of the Makefile so that it can act like documentation within the Makefile. It suggests using `../configure` instead of `../configure --targets qemu-riscv64` because the configure script will explain how to list and select targets when run with no arguments. Signed-off-by: arbormoss <arbormoss@woodsprite.dev>
This fixes the find prints after each file is formatted. The busybox version of find in our alpine qemu VM does not recongnise -printf. Signed-off-by: arbormoss <arbormoss@woodsprite.dev>
This adds time travel debugging using qemu's built in replay/record. Only qemu-riscv64 is added. It is the highest priority target and meant as the default virtual environment. `make qemu-record`: Record a debug playback. `make qemu-replay`: Replay a debug playback for gdb. Run `make gdb` in another terminal. `rsi` or `reverse-stepi` steps one instruction backwards and `rc` or `reverse-continue` finds the most recent breakpoint in the past. Signed-off-by: arbormoss <arbormoss@woodsprite.dev>
This adds a time travel debugging tutorial to the docs. It says only `qemu-riscv64` is supported, because the other targets aren't added at this point. Signed-off-by: arbormoss <arbormoss@woodsprite.dev>
This adds the time travel targets for qemu record and recall to the help text used in `make help`. Signed-off-by: arbormoss <arbormoss@woodsprite.dev>
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This adds time travel debugging using qemu's built in replay/record.
Only qemu-riscv64 is added. It is the highest priority target and meant
as the default virtual environment.
make qemu-record: Record a debug playback.make qemu-replay: Replay a debug playback for gdb. Runmake gdbinanother terminal.
rsiorreverse-stepisteps one instruction backwards andrcorreverse-continuefinds the most recent breakpoint in the past.This adds a time travel debugging tutorial to the docs. It says only
qemu-riscv64is supported, because the other targets aren't added atthis point.
This should close #42 .
Merge this after #103 .