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1 files changed, 115 insertions, 0 deletions

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