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      1 #!/bin/bash
      2 # Copyright (C) 2018 The Android Open Source Project
      3 #
      4 # Licensed under the Apache License, Version 2.0 (the "License");
      5 # you may not use this file except in compliance with the License.
      6 # You may obtain a copy of the License at
      7 #
      8 #      http://www.apache.org/licenses/LICENSE-2.0
      9 #
     10 # Unless required by applicable law or agreed to in writing, software
     11 # distributed under the License is distributed on an "AS IS" BASIS,
     12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13 # See the License for the specific language governing permissions and
     14 # limitations under the License.
     15 
     16 # Get backtraces for a process.
     17 if [[ $1 =~ ^[0-9]+$ ]] ; then
     18     PID="$1"
     19 elif [ "$1" ] ; then
     20     # Try --exact first, and fallback to nonexact if we find nothing.
     21     PIDLIST="$(pid --exact $1 || pid $1)"
     22     if [[ $PIDLIST =~ ^[0-9]+$ ]] ; then
     23         PID="$PIDLIST"
     24     elif [ "$PIDLIST" ] ; then
     25         echo "more than one process: $1"
     26     else
     27         echo "no such process: $1"
     28     fi
     29 else
     30     echo "usage: stacks [pid|process name]"
     31 fi
     32 
     33 if [ "$PID" ] ; then
     34     # Use `debuggerd -j` on java processes.
     35     if adb shell readlink /proc/$PID/exe | egrep -q '^/system/bin/app_process' ; then
     36         # But not the zygote.
     37         if ! adb shell cat /proc/$PID/cmdline | egrep -q '^zygote'; then
     38             adb shell debuggerd -j $PID
     39             exit $?
     40         fi
     41     fi
     42 
     43     adb shell debuggerd -b $PID
     44 fi
     45