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Meta: Add gdb command to serenity.sh

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This uses tmux for a split screen setup, which makes it easy do debug
the kernel while viewing the QEMU output in the same terminal.
This commit is contained in:
Tom 2021-03-10 21:26:26 -07:00 committed by Andreas Kling
parent de6c5128fd
commit 929c90f8c8
Notes: sideshowbarker 2024-07-18 21:32:39 +09:00 
Author: https://github.com/tomuta
Commit: https://github.com/SerenityOS/serenity/commit/929c90f8c8c
Pull-request: https://github.com/SerenityOS/serenity/pull/5723
1 changed files with 74 additions and 1 deletions
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75
Meta/serenity.sh
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@ -15,6 +15,10 @@ Usage: $ARG0 COMMAND [TARGET] [ARGS...]
All other TARGETs: $ARG0 run [TARGET] [kernel_cmd_line]
Runs the built image in QEMU, and optionally passes the
kernel_cmd_line to the Kernel
gdb: Same as run, but also starts a gdb remote session.
$ARG0 gdb [TARGET] [kernel_cmd_line] [-ex 'any gdb command']...
If specified, passes the kernel_cmd_line to the Kernel
Passes through '-ex' commands to gdb
delete: Removes the build environment for the TARGET
recreate: Deletes and re-creates the build environment for TARGET
rebuild: Deletes and re-creates the build environment, and compiles for TARGET
@ -37,6 +41,9 @@ Usage: $ARG0 COMMAND [TARGET] [ARGS...]
Resolves the address 0x12345678 in the Kernel binary
$ARG0 addr2line i686 WindowServer 0x12345678
Resolves the address 0x12345678 in the WindowServer binary
$ARG0 gdb i686 smp=on -ex 'hb *init'
Runs the image for the TARGET i686 in qemu and attaches a gdb session
setting a breakpoint at the init() function in the Kernel.
EOF
}
@ -131,7 +138,45 @@ delete_toolchain() {
[ ! -d "$TOOLCHAIN_DIR" ] || rm -rf "$TOOLCHAIN_DIR"
}
if [[ "$CMD" =~ ^(build|install|image|run|rebuild|recreate|kaddr2line|addr2line|setup-and-run)$ ]]; then
kill_tmux_session() {
local TMUX_SESSION
TMUX_SESSION="$(tmux display-message -p '#S')"
[ -z "$TMUX_SESSION" ] || tmux kill-session -t "$TMUX_SESSION"
}
set_tmux_title() {
printf "\033]2;%s\033\\" "$1"
}
run_gdb() {
local GDB_ARGS=()
local PASS_ARG_TO_GDB=""
local KERNEL_CMD_LINE=""
for arg in "${CMD_ARGS[@]}"; do
if [ "$PASS_ARG_TO_GDB" != "" ]; then
GDB_ARGS+=( "$PASS_ARG_TO_GDB" "$arg" )
PASS_ARG_TO_GDB=""
elif [ "$arg" = "-ex" ]; then
PASS_ARG_TO_GDB="$arg"
elif [[ "$arg" =~ ^-.*$ ]]; then
die "Don't know how to handle argument: $arg"
else
if [ "$KERNEL_CMD_LINE" != "" ]; then
die "Kernel command line can't be specified more than once"
fi
KERNEL_CMD_LINE="$arg"
fi
done
if [ "$PASS_ARG_TO_GDB" != "" ]; then
GDB_ARGS+=( "$PASS_ARG_TO_GDB" )
fi
if [ -n "$KERNEL_CMD_LINE" ]; then
export SERENITY_KERNEL_CMDLINE="$KERNEL_CMD_LINE"
fi
gdb "$BUILD_DIR/Kernel/Kernel" -ex 'target remote :1234' "${GDB_ARGS[@]}" -ex cont
}
if [[ "$CMD" =~ ^(build|install|image|run|gdb|rebuild|recreate|kaddr2line|addr2line|setup-and-run)$ ]]; then
cmd_with_target
[[ "$CMD" != "recreate" && "$CMD" != "rebuild" ]] || delete_target
# FIXME: We should probably call ensure_toolchain first, but this somehow causes
@ -167,6 +212,17 @@ if [[ "$CMD" =~ ^(build|install|image|run|rebuild|recreate|kaddr2line|addr2line|
build_target run
fi
;;
gdb)
command -v tmux >/dev/null 2>&1 || die "Please install tmux!"
build_target
if [ "$TARGET" = "lagom" ]; then
run_tests "${CMD_ARGS[0]}"
else
build_target install
build_target image
tmux new-session "$ARG0" __tmux_cmd "$TARGET" run "${CMD_ARGS[@]}" \; set-option -t 0 mouse on \; split-window "$ARG0" __tmux_cmd "$TARGET" gdb "${CMD_ARGS[@]}" \;
fi
;;
rebuild)
build_target "$@"
;;
@ -200,6 +256,23 @@ elif [ "$CMD" = "rebuild-toolchain" ]; then
[ "$TARGET" != "lagom" ] || die "The lagom target uses the host toolchain"
delete_toolchain
ensure_toolchain
elif [ "$CMD" = "__tmux_cmd" ]; then
trap kill_tmux_session EXIT
cmd_with_target
CMD="$1"; shift
CMD_ARGS=("${CMD_ARGS[@]:1}")
if [ "$CMD" = "run" ]; then
if [ -n "${CMD_ARGS[0]}" ]; then
export SERENITY_KERNEL_CMDLINE="${CMD_ARGS[0]}"
fi
# We need to make sure qemu doesn't start until we continue in gdb
export SERENITY_EXTRA_QEMU_ARGS="${SERENITY_EXTRA_QEMU_ARGS} -d int -no-reboot -no-shutdown -S"
set_tmux_title 'qemu'
build_target run
elif [ "$CMD" = "gdb" ]; then
set_tmux_title 'gdb'
run_gdb "${CMD_ARGS[@]}"
fi
else
>&2 echo "Unknown command: $CMD"
usage