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6 files changed, 194 insertions, 0 deletions

diff --git a/.SRCINFO b/.SRCINFO
new file mode 100644
index 000000000000..325b3ac4c3b3
--- /dev/null
+++ b/.SRCINFO
@@ -0,0 +1,18 @@
+pkgbase = systemd-shutdown-diagnose
+	pkgdesc = help to diagnose shutdown sequence for systemd
+	pkgver = 4
+	pkgrel = 1
+	url = http://github.com/farseerfc/systemd-shutdown-diagnose
+	arch = any
+	license = GPL2
+	source = analyze-shutdown
+	source = diagnose.shutdown
+	source = shutdown-diagnose.service
+	source = start-diagnose-shutdown
+	sha512sums = 883b12b23cad21f620fb10e6f682390d155da65f41517701296793e7ad4ca16e55547b78d3fb06dd697a261e5f236e5d96e6d6c539d16ed3a7b52f890066ac59
+	sha512sums = ab00ff35e6e74f90589587c44d3efc4584f0d5d40e7767ee2fc982f2b20f0656dfbb58b3c3a8103a32538a28bb08dd15087114aae0b1f6f73a12b6073d32c99f
+	sha512sums = 26faec19537be2d4dad83e16a3557d1ab20f71a3f66abbfb8725e7fd9233fef6df2c21c81f5c48c48963746d8b319483615a25ae1fb49f8b3667f30e6b1418ec
+	sha512sums = 2ee770dce7cbf95d07b49e24522c6be2d7dd8f3cbe88097d6b27a9ea05052525ef58ef6c2f95bf09bcbc38db46918098faf13655c0f6853b3057dac9ec10e6bb
+
+pkgname = systemd-shutdown-diagnose
+
diff --git a/PKGBUILD b/PKGBUILD
new file mode 100644
index 000000000000..020552ecafad
--- /dev/null
+++ b/PKGBUILD
@@ -0,0 +1,25 @@
+# Maintainer: Jiachen Yang <farseerfc@gmail.com>
+pkgname=systemd-shutdown-diagnose
+pkgver=4
+pkgrel=1
+pkgdesc="help to diagnose shutdown sequence for systemd"
+arch=(any)
+url="http://github.com/farseerfc/systemd-shutdown-diagnose"
+license=('GPL2')
+depends=()
+source=('analyze-shutdown'
+    'diagnose.shutdown'
+    'shutdown-diagnose.service'
+    'start-diagnose-shutdown'
+)
+sha512sums=('883b12b23cad21f620fb10e6f682390d155da65f41517701296793e7ad4ca16e55547b78d3fb06dd697a261e5f236e5d96e6d6c539d16ed3a7b52f890066ac59'
+            'ab00ff35e6e74f90589587c44d3efc4584f0d5d40e7767ee2fc982f2b20f0656dfbb58b3c3a8103a32538a28bb08dd15087114aae0b1f6f73a12b6073d32c99f'
+            '26faec19537be2d4dad83e16a3557d1ab20f71a3f66abbfb8725e7fd9233fef6df2c21c81f5c48c48963746d8b319483615a25ae1fb49f8b3667f30e6b1418ec'
+            '2ee770dce7cbf95d07b49e24522c6be2d7dd8f3cbe88097d6b27a9ea05052525ef58ef6c2f95bf09bcbc38db46918098faf13655c0f6853b3057dac9ec10e6bb')
+
+package() {
+    install -Dm755 diagnose.shutdown "$pkgdir/usr/lib/systemd/system-shutdown/diagnose.shutdown"
+    install -Dm755 start-diagnose-shutdown "$pkgdir/usr/bin/start-diagnose-shutdown"
+    install -Dm755 analyze-shutdown "$pkgdir/usr/bin/analyze-shutdown"
+    install -Dm644 shutdown-diagnose.service "$pkgdir/usr/lib/systemd/system/shutdown-diagnose.service"
+}
diff --git a/analyze-shutdown b/analyze-shutdown
new file mode 100755
index 000000000000..40e0919d13e5
--- /dev/null
+++ b/analyze-shutdown
@@ -0,0 +1,115 @@
+#!/bin/bash
+declare -A kill_time
+declare -A exit_time
+declare -a exit_seq
+declare -A pid_comm
+declare -A wait_time
+declare -A killer
+declare -A recv_sig
+
+# ts, pid, signo
+set_kill_time()
+{
+    if [[ "${kill_time[$2]}" ]]; then
+        return
+    fi
+
+    case "$3" in
+        0 | 1 | 2 | 3 | 6 | 9 | 15)
+            kill_time[$2]=$1
+        ;;
+    esac
+}
+
+# ts, pid
+set_exit_time()
+{
+    if [[ "${exit_time[$2]}" ]]; then
+        return
+    fi
+
+    exit_time[$2]=$1
+    exit_seq+=($pid)
+}
+
+# pid, target_pid, signo
+add_killer()
+{
+    killer[$1]+=" $3>$target_pid"
+}
+
+#ts, pid, signo
+add_signal()
+{
+    recv_sig[$2]+=" $3($1)"
+}
+
+declare -i lineno=0
+while read line; do
+    let lineno++
+    if [[ 0 == ${#line} ]] || [[ '#' == ${line:0:1} ]]; then
+        continue
+    fi
+
+    cols=($line)
+    comm=${cols[0]%-*}
+    pid=${cols[0]#$comm-}
+    ts=${cols[3]%:}
+    ts=${ts//./}
+    func=${cols[4]%(*}
+    func=${func%:}
+
+    if [[ -z "$shut_time" ]]; then
+        shut_time=$ts
+        ts=0
+    else
+        zeros=000000
+        ts=$(($ts-$shut_time))
+        if (( 6 >= ${#ts} )); then
+            ts=${zeros:0:7-${#ts}}$ts
+        fi
+        ts=${ts:0:${#ts}-6}.${ts:${#ts}-6}
+    fi
+
+    case "$func" in
+        sched_process_exit)
+            set_exit_time $ts $pid
+            comm="${cols[5]#comm=}"
+        ;;
+        sys_kill | sys_tgkill)
+            if [[ '->' == "${cols[5]}" ]]; then
+                if [[ '0x0' != "${cols[6]}" ]]; then
+                    target_pid=${killer[$pid]##*>}
+                    if [[ "$target_pid" ]]; then
+                        add_killer $pid $target_pid $signo
+                        set_exit_time $ts $target_pid
+                    fi
+                fi
+            else
+                let target_pid=0x${cols[5]%,}
+                if [[ 'sys_kill' == "$func" ]]; then
+                    let signo=0x${cols[7]%)}
+                else
+                    let signo=0x${cols[9]%)}
+                fi
+                set_kill_time $ts $target_pid $signo
+                add_killer $pid $target_pid $signo
+            fi
+        ;;
+        signal_deliver)
+            let signo=${cols[5]#sig=}
+            add_signal $ts $pid $signo
+        ;;
+        sys_exit)
+            set_kill_time $ts $pid -
+        ;;
+    esac
+
+    if [[ -z "${pid_comm[$pid]}" ]] || [[ '<...>' == "${pid_comm[$pid]}" ]]; then
+        pid_comm[$pid]=$comm
+    fi
+done
+
+for pid in "${exit_seq[@]}"; do
+    printf "%15s(%4s) exited at %10ss, got signals: %s\n" ${pid_comm[$pid]} $pid ${exit_time[$pid]} "${recv_sig[$pid]}"
+done
diff --git a/diagnose.shutdown b/diagnose.shutdown
new file mode 100755
index 000000000000..0ff72cdc9655
--- /dev/null
+++ b/diagnose.shutdown
@@ -0,0 +1,5 @@
+#!/bin/sh
+mount -o remount,rw /
+cat /sys/kernel/debug/tracing/trace >/shutdown.log
+mount -o remount,ro /
+
diff --git a/shutdown-diagnose.service b/shutdown-diagnose.service
new file mode 100644
index 000000000000..fef096532ea4
--- /dev/null
+++ b/shutdown-diagnose.service
@@ -0,0 +1,11 @@
+[Unit]
+Description= A service to execute start diagnose-shutdown at begining of shutdown
+
+[Service]
+Type=idle
+RemainAfterExit=yes
+ExecStart=/usr/bin/true
+ExecStop=/usr/bin/start-diagnose-shutdown
+
+[Install]
+WantedBy=default.target
diff --git a/start-diagnose-shutdown b/start-diagnose-shutdown
new file mode 100755
index 000000000000..395b8bf81303
--- /dev/null
+++ b/start-diagnose-shutdown
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+PS4="> ${0##*/}: "
+set -x
+
+cd /sys/kernel/debug/tracing
+echo 0 >tracing_on
+echo >trace
+
+echo syscalls:sys_enter_exit >set_event
+echo syscalls:sys_enter_kill >>set_event
+echo syscalls:sys_enter_tkill >>set_event
+echo syscalls:sys_enter_tgkill >>set_event
+echo signal:signal_deliver >>set_event
+echo sched:sched_process_exit >>set_event
+
+echo global >trace_clock
+echo 40960 >buffer_size_kb
+echo nop >current_tracer
+echo 1 >tracing_on