#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
# Copyright (c) 2020-2022 Huawei Device Co., Ltd. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this list of
#    conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice, this list
#    of conditions and the following disclaimer in the documentation and/or other materials
#    provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors may be used
#    to endorse or promote products derived from this software without specific prior written
#    permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import sys
import os
import argparse
import io
import commands

def find_string(excinfo_file, string):
    res = ''
    with open(excinfo_file, 'r+') as f:
        for lines in f:
            if string in lines:
                res = lines
                break
    return res

def is_kernel_exc(excinfo_file):
    res = find_string(excinfo_file, 'excFrom: kernel')
    print(res)
    return res != ''

def is_user_exc(excinfo_file):
    res = find_string(excinfo_file, 'excFrom: User')
    print(res)
    return res != ''

def parse_string_line(excinfo_file, string):
    line = find_string(excinfo_file, string)
    if line == '':
        print("%s is not in %s\n" %(string, excinfo_file))
        return ''
    line = line.replace('\n', '')
    strlist = line.split(' ')
    return strlist

def parse_kernel_pc_klr(excinfo_file, ohos_image_file, string, addr2line_cmd, objdump_cmd):
    #parse pc
    with open(excinfo_file, 'r+') as f:
        start = 0
        for lines in f.readlines():
            if 'excFrom: kernel' in lines:
                if start == 1:
                    break
                start = 1
            if start and string in lines:
                lines = lines[lines.find(string):]
                strlist = lines.split()
                cmd = "%s%s | grep %s: -B 10 -A 5 -w" % (objdump_cmd, ohos_image_file, strlist[2][2:])
                ret = commands.getoutput(cmd)
                print(ret)
                cmd = "%s%s %s" % (addr2line_cmd, ohos_image_file, strlist[2])
                ret = commands.getoutput(cmd)
                ret = ret.split('\n')
                print("<%s>%s<%s>\n") % (string, ret[0], strlist[2])
                return 0
    return -1

def parse_kernel_lr(excinfo_file, ohos_image_file, addr2line_cmd):
    with open(excinfo_file, 'r+') as f:
        start = 0
        index = 1
        for lines in f.readlines():
            if 'excFrom: kernel' in lines:
                if start == 1:
                    break
                start = 1
            if start and 'lr =' in lines:
                lines = lines[lines.find('lr ='):]
                strlist = lines.split()
                cmd = "%s%s %s" % (addr2line_cmd, ohos_image_file, strlist[2])
                ret = commands.getoutput(cmd)
                ret = ret.split('\n')
                print("<%.2d>%s<%s>" % (index, ret[0], strlist[2]))
                index = index + 1

def parse_kernel_exc(excinfo_file, ohos_image_file, addr2line_cmd, objdump_cmd):
    #parse pc, klr
    ret1 = parse_kernel_pc_klr(excinfo_file, ohos_image_file, 'pc', addr2line_cmd, objdump_cmd)
    ret2 = parse_kernel_pc_klr(excinfo_file, ohos_image_file, 'klr', addr2line_cmd, objdump_cmd)
    #parse lr
    parse_kernel_lr(excinfo_file, ohos_image_file, addr2line_cmd)
    return ret1 and ret2

def parse_user_pc_ulr(excinfo_file, rootfs_dir, string, addr2line_cmd, objdump_cmd):
    #parse pc
    with open(excinfo_file, 'r+') as f:
        start = 0
        for lines in f.readlines():
            if 'excFrom: User' in lines:
                if start == 1:
                    break
                start = 1
            if start and string in lines:
                lines = lines[lines.find(string):]
                strlist = lines.split()
                if len(strlist) < 7:
                    print('%s is error'%string)
                    return 0
                cmd = "%s%s%s | grep %s: -B 10 -A 5 -w" % (objdump_cmd, rootfs_dir, strlist[4], strlist[6][2:])
                ret = commands.getoutput(cmd)
                print(ret)
                cmd = "%s%s%s %s" % (addr2line_cmd, rootfs_dir, strlist[4], strlist[6])
                ret = commands.getoutput(cmd)
                ret = ret.split('\n')
                print("<%s>%s<%s><%s>\n" % (string, ret[0], strlist[6], strlist[4]))
                return 0
    return -1

def parse_user_lr(excinfo_file, rootfs_dir, addr2line_cmd):
    with open(excinfo_file, 'r+') as f:
        start = 0
        index = 1
        for lines in f.readlines():
            if 'excFrom: User' in lines:
                if start == 1:
                    break
                start = 1
            if start and 'lr =' in lines:
                lines = lines[lines.find('lr ='):]
                strlist = lines.split()
                if len(strlist) < 11:
                    print('%s is error' % strlist)
                    return
                cmd = "%s%s%s %s" % (addr2line_cmd, rootfs_dir, strlist[8], strlist[10])
                res = commands.getoutput(cmd)
                res = res.split('\n')
                print("<%.2d>%s<%s><%s>" % (index, res[0], strlist[10], strlist[8]))
                index = index + 1

def parse_user_exc(excinfo_file, rootfs_dir, addr2line_cmd, objdump_cmd):
    #parse pc ulr
    ret1 = parse_user_pc_ulr(excinfo_file, rootfs_dir, 'pc', addr2line_cmd, objdump_cmd)
    ret2 = parse_user_pc_ulr(excinfo_file, rootfs_dir, 'ulr', addr2line_cmd, objdump_cmd)
    #parse lr
    parse_user_lr(excinfo_file, rootfs_dir, addr2line_cmd)
    return ret1 and ret2

def parse_backtrace(backtrace_file, ohos_image_file, addr2line_cmd):
    with open(backtrace_file, 'r+') as f:
        find = -1
        start = 0
        index = 1
        for lines in f.readlines():
            if 'backtrace begin' in lines:
                if start == 1:
                    break
                start = 1
            if start and 'lr =' in lines:
                lines = lines[lines.find('lr ='):]
                strlist = lines.split()
                cmd = "%s%s %s" % (addr2line_cmd, ohos_image_file, strlist[2])
                ret = commands.getoutput(cmd)
                ret = ret.split('\n')
                print("\n<%.2d>%s<%s>" % (index, ret[0], strlist[2]))
                index = index + 1
                find = 0

    return find

def parse_excinfo(excinfo_file, ohos_image_file, rootfs_dir, addr2line_cmd, objdump_cmd):
    cmd = "dos2unix %s" % (excinfo_file)
    commands.getoutput(cmd)
    kernel_exc = is_kernel_exc(excinfo_file)
    user_exc = is_user_exc(excinfo_file)

    if kernel_exc == False and user_exc == False:
        if parse_backtrace(excinfo_file, ohos_image_file, addr2line_cmd) != 0:
            print("%s is not a excinfo or backtrace file\n"%excinfo_file)
            return -1
        else:
            return 0
    if user_exc:
        if rootfs_dir != None:
            return parse_user_exc(excinfo_file, rootfs_dir, addr2line_cmd, objdump_cmd)
        else:
            print('error: rootfs_dir is none')
            return -1
    return parse_kernel_exc(excinfo_file, ohos_image_file, addr2line_cmd, objdump_cmd)

def parse_compiler(compiler):
    addr2line = ''
    addr2line_cmd = ''
    objdump = ''
    objdump_cmd = ''
    cmd = "which %s" % (compiler)
    ret = commands.getoutput(cmd)
    if ret == '':
        print('%s is not exist'%compiler)
        return None
    index1 = ret.rfind('gcc')
    index2 = ret.rfind('clang')
    if index1 != -1:
        addr2line = ret[0:index1] + 'addr2line'
        objdump = ret[0:index1] + 'objdump'
    elif index2 != -1:
        index3 = ret.rfind('/')
        addr2line = ret[0:index3 + 1] + 'llvm-addr2line'
        objdump = ret[0:index3 + 1] + 'llvm-objdump'
    else:
        print('%s is not arm-xxx-xxx-gcc or clang'%compiler)
        return None
    addr2line_cmd = addr2line + ' -C -f -e '
    objdump_cmd = objdump + ' -d '
    return [addr2line_cmd, objdump_cmd]

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--f', help = 'excinfo file or backtrace file')
    parser.add_argument('--e', help = 'elf system image file')
    parser.add_argument('--r', help = 'the path of rootfs')
    parser.add_argument('--c', help = 'compiler [arm-xxx-xxx-gcc/clang]')
    args = parser.parse_args()

    if args.f == None or args.e == None:
        print("input error\n")
        parser.print_help()
        return -1

    excinfo_file = args.f
    ohos_image_file = args.e
    rootfs_dir = args.r

    addr2line_cmd = 'llvm-addr2line -C -f -e '
    objdump_cmd = 'llvm-objdump -d '
    if args.c != None:
        cmd = parse_compiler(args.c)
        if cmd == None:
            return -1
        addr2line_cmd = cmd[0]
        objdump_cmd = cmd[1]
    return parse_excinfo(excinfo_file, ohos_image_file, rootfs_dir, addr2line_cmd, objdump_cmd)

if __name__ == "__main__":
    sys.exit(main())