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|
#!/bin/bash
set -euf -o pipefail
scripts=$(dirname $0)
# shellcheck source=jenkins-helpers.sh
. $scripts/jenkins-helpers.sh
# shellcheck source=round-robin.sh
. $scripts/round-robin.sh
convert_args_to_variables "$@"
obligatory_variables rr[ci_config]
# Execution mode: baseline, bisect, jenkins-full
# shellcheck disable=SC2154
rr[mode]="${rr[mode]-baseline}"
# Set custom revision for one of the projects, and use baseline revisions
# for all other projects.
# shellcheck disable=SC2154
rr[ci_project]="${rr[ci_project]-tcwg_kernel}"
# shellcheck disable=SC2154
rr[baseline_branch]="${rr[baseline_branch]-linaro-local/ci/${rr[ci_project]}/${rr[ci_config]}}"
# shellcheck disable=SC2154
rr[update_baseline]="${rr[update_baseline]-update}"
# shellcheck disable=SC2154
rr[top_artifacts]="${rr[top_artifacts]-$(pwd)/artifacts}"
# {toolchain_name}-{toolchain_ver}-{target}-{linux}-{linux_config}
IFS=- read -a ci_config <<EOF
${rr[ci_config]}
EOF
# shellcheck disable=SC2154
rr[toolchain]=${rr[toolchain]-${ci_config[0]}}
# shellcheck disable=SC2154
rr[release]=${rr[release]-${ci_config[1]}}
# shellcheck disable=SC2154
rr[target]=${rr[target]-${ci_config[2]}}
# shellcheck disable=SC2154
rr[linux_config]=${rr[linux_config]-${ci_config[4]}}
case "${rr[toolchain]}" in
llvm)
# shellcheck disable=SC2154
rr[components]="binutils llvm linux qemu" ;;
gnu)
rr[components]="binutils gcc linux qemu" ;;
*) assert_with_msg "Unknown toolchain \"${rr[toolchain]}\"" false ;;
esac
# Use baseline branches by default.
for c in ${rr[components]}; do
rr[${c}_git]=${rr[${c}_git]-baseline}
done
start_at="${start_at-default}"
finish_at="${finish_at-default}"
verbose="${verbose-true}"
verbose2="${verbose2-false}"
if $verbose2; then set -x; fi
trap print_traceback EXIT
# Set start and finish steps for different modes.
default_start_at=""
default_finish_at=""
case "${rr[mode]}" in
"baseline")
default_finish_at="update_baseline"
;;
"bisect")
case "${rr[toolchain]}:$(print_single_updated_component)" in
gnu:binutils) default_start_at="build_abe-binutils" ;;
gnu:gcc) default_start_at="build_abe-stage1" ;;
llvm:llvm) default_start_at="build_llvm" ;;
*:linux) default_start_at="build_linux" ;;
*:qemu) default_start_at="build_abe-qemu" ;;
*) assert false ;;
esac
default_finish_at="check_regression"
;;
"jenkins-full") ;;
esac
if [ x"$start_at" = x"default" ]; then
start_at="$default_start_at"
fi
if [ x"$finish_at" = x"default" ]; then
finish_at="$default_finish_at"
fi
run_step_init "$start_at" "$finish_at" "${rr[top_artifacts]}" "$verbose"
# Build Linux kernel
build_linux_1 ()
{
(
set -euf -o pipefail
sanity_check_pwd
clone_repo linux
# shellcheck disable=SC2115
rm -rf "$(pwd)"/bin
mkdir "$(pwd)"/bin
local gnu_host abe_bin cc ld_opt=""
gnu_host=$(print_gnu_target native)
abe_bin="$(pwd)/abe/builds/destdir/$gnu_host/bin"
# Use binutils $abe_bin for both GNU and LLVM builds.
# For LLVM builds at the very least we need target assembler, since,
# otherwise, clang will try to use /usr/bin/as for cases that integrated
# assembler can't handle.
export PATH="$abe_bin:$PATH"
case "${rr[toolchain]}" in
llvm)
local llvm_bin
llvm_bin="$(pwd)/llvm-install/bin"
export PATH="$llvm_bin:$PATH"
cc="$llvm_bin/clang"
ld_opt="LD=$llvm_bin/ld.lld"
;;
gnu)
cc="$abe_bin/$(print_gnu_target ${rr[target]})-gcc"
;;
esac
# Use ccache only when bisecting linux or qemu (or preparing to).
# Otherwise the compiler is new in every build and we would
# only clobber ccache volume.
local ccache=""
case "${rr[mode]}:$(print_single_updated_component)" in
"baseline:") ccache="ccache" ;;
"bisect:linux") ccache="ccache" ;;
"bisect:qemu") ccache="ccache" ;;
esac
cat > "$(pwd)"/bin/${rr[target]}-cc <<EOF
#!/bin/sh
exec $ccache $cc "\$@"
EOF
chmod +x "$(pwd)"/bin/${rr[target]}-cc
# Define make variables.
local opts
opts="CC=$(pwd)/bin/${rr[target]}-cc $ld_opt SUBLEVEL=0 EXTRAVERSION=-bisect"
if [ x"${rr[target]}" != x"$(uname -m)" ]; then
opts="$opts ARCH=$(print_kernel_target ${rr[target]})"
opts="$opts CROSS_COMPILE=$(print_gnu_target ${rr[target]})-"
opts="$opts HOSTCC=gcc"
fi
cd linux
make $opts distclean
make $opts ${rr[linux_config]}
sed -i -e 's:CONFIG_LOCALVERSION_AUTO=y:# CONFIG_LOCALVERSION_AUTO is not set:' .config
set +f; rm -f localversion*; set -f
make $opts oldconfig
ccache -z
KBUILD_BUILD_TIMESTAMP=0 make $opts -j"$(nproc --all)" -s -k &
local res=0 && wait $! || res=$?
ccache -s
return $res
)
}
# Build linux and count number successfully built .o files in linux
build_linux ()
{
(
set -euf -o pipefail
build_linux_1 &
local res=0 && wait $! || res=$?
# Number of .o files created is the main success metric.
local linux_n_obj
linux_n_obj=$(find linux -name "*.o" | wc -l)
echo "# linux_n_obj:" >> ${rr[top_artifacts]}/results
echo "$linux_n_obj" >> ${rr[top_artifacts]}/results
if [ $res = 0 ]; then
echo "# linux build successful:" >> ${rr[top_artifacts]}/results
echo "all" >> ${rr[top_artifacts]}/results
fi
return $res
)
}
# Boot linux kernel
boot_linux ()
{
(
set -euf -o pipefail
local image cpu
case ${rr[target]} in
aarch64)
image=linux/arch/arm64/boot/Image.gz
cpu="-cpu cortex-a53"
;;
arm)
image=linux/arch/arm/boot/zImage
cpu=""
;;
*) assert false ;;
esac
local gnu_host qemu
gnu_host=$(print_gnu_target native)
qemu="$(pwd)/abe/builds/hosttools/$gnu_host/bin/qemu-system-${rr[target]}"
timeout --foreground 60s "$qemu" \
-kernel $image -machine virt $cpu -m 512 \
-serial stdio -display none \
-append "console=ttyAMA0 panic=-1" -no-reboot
echo "# linux boot successful:" >> ${rr[top_artifacts]}/results
echo "boot" >> ${rr[top_artifacts]}/results
)
}
# Exit with code 0 if no regression compared to base-artifacts/results.
no_regression_p ()
{
(
set -euf -o pipefail
local ref_artifacts=$1
local new_artifacts=$2
local linux_n_obj
linux_n_obj=$(grep -v "^#" $new_artifacts/results | tail -n1)
# Assume worst for non-existent baseline.
local base_linux_n_obj="-10"
if [ -f $ref_artifacts/results ]; then
base_linux_n_obj=$(grep -v "^#" $ref_artifacts/results | tail -n1)
fi
# In log scan for errors below
# - sed -e 's/"[^"]*"//g' -- removes quoted "error: app diagnostics" strings
# - " error:" detects compiler errors from GCC and Clang (including GCC ICEs)
# - "^ERROR:" detects linker errors
# - ": undefined reference" detects missing symbols during linking
# - "] Error " detects GNU make errors
# Then grep for "grep" to exclude other uses of this search.
# shellcheck disable=SC2154
# (defined by init_step in jenkins-helpers)
cat > $run_step_artifacts/results.regressions <<EOF
# First few build errors in logs:
$(cat $new_artifacts/console.log | sed -e 's/"[^"]*"//g' | grep " error:\|^ERROR:\|: undefined reference\|\] Error " | grep -v "grep" | head | sed -e "s/^/# /")
EOF
case "$linux_n_obj:$base_linux_n_obj" in
boot:*) return 0 ;;
*:boot) return 1 ;;
all:*) return 0 ;;
*:all) return 1 ;;
*)
if ! [ "$linux_n_obj" -ge "-10" ]; then
# Something is very wrong with result (e.g., it's not a number).
return 1
fi
if ! [ "$base_linux_n_obj" -ge "-10" ]; then
# Something is very wrong with result (e.g., it's not a number).
return 0
fi
if [ $linux_n_obj -ge $base_linux_n_obj ]; then
return 0
else
return 1
fi
;;
esac
)
}
# Implement rr[breakup_updated_components] hook.
tcwg_kernel_breakup_updated_components ()
{
(
set -euf -o pipefail
# Linux changes tend to cause the most regressions.
# Breakup updated components into linux and the rest of components
# to reduce the number of builds.
if print_updated_components "\n" | grep -q "^linux\$"; then
echo "linux"
print_updated_components "\n" | grep -v "^linux\$" | tr '\n' ' ' | sed -e "s/ \$//g"
echo
else
print_updated_components "\n"
fi
)
}
# shellcheck disable=SC2154
rr[breakup_updated_components]=tcwg_kernel_breakup_updated_components
run_step stop_on_fail -10 reset_artifacts
run_step stop_on_fail x prepare_abe
run_step skip_on_fail -9 build_abe binutils
case "${rr[toolchain]}" in
gnu)
run_step skip_on_fail -5 build_abe stage1
;;
llvm)
run_step skip_on_fail -5 build_llvm
;;
esac
run_step skip_on_fail -2 build_abe qemu
run_step skip_on_fail x build_linux
run_step skip_on_fail x boot_linux
run_step reset_on_fail x check_regression
run_step stop_on_fail x update_baseline
run_step stop_on_fail x push_baseline
trap "" EXIT
|