tools/coredump: add coredump python parser

Signed-off-by: chao an <anchao@xiaomi.com>

Author: anchao

tools/coredump.py

@@ -0,0 +1,118 @@
+#!/usr/bin/env python3
+############################################################################
+# tools/coredump.py
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+import argparse
+import binascii
+import os
+import struct
+import sys
+
+import lzf
+
+
+def decompress(lzffile, outfile):
+    chunk_number = 1
+
+    while True:
+        prefix = lzffile.read(2)
+
+        if len(prefix) == 0:
+            break
+        elif prefix != b"ZV":
+            break
+
+        typ = lzffile.read(1)
+        clen = struct.unpack(">H", lzffile.read(2))[0]
+
+        if typ == b"\x00":
+            chunk = lzffile.read(clen)
+        elif typ == b"\x01":
+            uncompressed_len = struct.unpack(">H", lzffile.read(2))[0]
+            cdata = lzffile.read(clen)
+            chunk = lzf.decompress(cdata, uncompressed_len)
+        else:
+            return
+
+        outfile.write(chunk)
+        chunk_number += 1
+
+
+def unhexlify(infile, outfile):
+    for line in infile.readlines():
+        line = line.strip()
+        if line == "":
+            break
+        index = line.rfind(" ")
+        if index > 0:
+            line = line[index + 1 :]
+
+        outfile.write(binascii.unhexlify(line))
+
+
+def parse_args():
+    global args
+    parser = argparse.ArgumentParser(
+        description=__doc__,
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        allow_abbrev=False,
+    )
+    parser.add_argument("input")
+    parser.add_argument("-o", "--output", help="Output file in hex.")
+    args = parser.parse_args()
+
+
+def main():
+    parse_args()
+    if not os.path.isfile(args.input):
+        sys.exit(1)
+
+    tmp = os.path.splitext(args.input)[0] + ".tmp"
+
+    if args.output is None:
+        args.output = os.path.splitext(args.input)[0] + ".core"
+
+    infile = open(args.input, "r")
+    tmpfile = open(tmp, "wb+")
+
+    unhexlify(infile, tmpfile)
+
+    infile.close()
+
+    tmpfile.seek(0, 0)
+
+    lzfhdr = tmpfile.read(2)
+
+    if lzfhdr == b"ZV":
+        outfile = open(args.output, "wb")
+        tmpfile.seek(0, 0)
+        decompress(tmpfile, outfile)
+        tmpfile.close()
+        outfile.close()
+        os.unlink(tmp)
+    else:
+        tmpfile.rename(args.output)
+        tmpfile.close()
+
+    print("Core file conversion completed: " + args.output)
+
+
+if __name__ == "__main__":
+    main()