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|
#------------------------------------------------------------------------------
# elftools tests
#
# Maxim Akhmedov (max42@yandex-team.ru)
# This code is in the public domain
#------------------------------------------------------------------------------
import unittest
import os
from elftools.elf.elffile import ELFFile
from elftools.elf.segments import NoteSegment
class TestCoreNotes(unittest.TestCase):
""" This test makes sure than core dump specific
sections are properly analyzed.
"""
@classmethod
def setUpClass(cls):
cls._core_file = open(os.path.join('test',
'testfiles_for_unittests', 'core_linux64.elf'),
'rb')
def test_core_prpsinfo(self):
elf = ELFFile(self._core_file)
for segment in elf.iter_segments():
if not isinstance(segment, NoteSegment):
continue
notes = list(segment.iter_notes())
for note in segment.iter_notes():
if note['n_type'] != 'NT_PRPSINFO':
continue
desc = note['n_desc']
self.assertEqual(desc['pr_state'], 0)
self.assertEqual(desc['pr_sname'], b'R')
self.assertEqual(desc['pr_zomb'], 0)
self.assertEqual(desc['pr_nice'], 0)
self.assertEqual(desc['pr_flag'], 0x400600)
self.assertEqual(desc['pr_uid'], 1000)
self.assertEqual(desc['pr_gid'], 1000)
self.assertEqual(desc['pr_pid'], 23395)
self.assertEqual(desc['pr_ppid'], 23187)
self.assertEqual(desc['pr_pgrp'], 23395)
self.assertEqual(desc['pr_sid'], 23187)
self.assertEqual(
desc['pr_fname'],
b'coredump_self\x00\x00\x00')
self.assertEqual(
desc['pr_psargs'],
b'./coredump_self foo bar 42 ' + b'\x00' * (80 - 27))
def test_core_nt_file(self):
"""
Test that the parsing of the NT_FILE note within a core file is
correct.
The assertions are made against the output of eu-readelf.
eu-readelf -n core_linux64.elf
...
CORE 621 FILE
10 files:
00400000-00401000 00000000 4096
/home/max42/pyelftools/test/coredump_self
00600000-00601000 00000000 4096
/home/max42/pyelftools/test/coredump_self
00601000-00602000 00001000 4096
/home/max42/pyelftools/test/coredump_self
7fa4593ae000-7fa45956d000 00000000 1830912
/lib/x86_64-linux-gnu/libc-2.23.so
7fa45956d000-7fa45976d000 001bf000 2097152
/lib/x86_64-linux-gnu/libc-2.23.so
7fa45976d000-7fa459771000 001bf000 16384
/lib/x86_64-linux-gnu/libc-2.23.so
7fa459771000-7fa459773000 001c3000 8192
/lib/x86_64-linux-gnu/libc-2.23.so
7fa459777000-7fa45979d000 00000000 155648
/lib/x86_64-linux-gnu/ld-2.23.so
7fa45999c000-7fa45999d000 00025000 4096
/lib/x86_64-linux-gnu/ld-2.23.so
7fa45999d000-7fa45999e000 00026000 4096
/lib/x86_64-linux-gnu/ld-2.23.so
...
"""
elf = ELFFile(self._core_file)
nt_file_found = False
for segment in elf.iter_segments():
if not isinstance(segment, NoteSegment):
continue
for note in segment.iter_notes():
if note['n_type'] != 'NT_FILE':
continue
nt_file_found = True
desc = note['n_desc']
self.assertEqual(desc['num_map_entries'], 10)
self.assertEqual(desc['page_size'], 4096)
self.assertEqual(len(desc['Elf_Nt_File_Entry']), 10)
self.assertEqual(len(desc['filename']), 10)
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][0],
desc['page_size'],
0x00400000,
0x00401000,
0x00000000)
self.assertEqual(desc['filename'][0],
b"/home/max42/pyelftools/test/coredump_self")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][1],
desc['page_size'],
0x00600000,
0x00601000,
0x00000000)
self.assertEqual(desc['filename'][1],
b"/home/max42/pyelftools/test/coredump_self")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][2],
desc['page_size'],
0x00601000,
0x00602000,
0x00001000)
self.assertEqual(desc['filename'][2],
b"/home/max42/pyelftools/test/coredump_self")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][3],
desc['page_size'],
0x7fa4593ae000,
0x7fa45956d000,
0x00000000)
self.assertEqual(desc['filename'][3],
b"/lib/x86_64-linux-gnu/libc-2.23.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][4],
desc['page_size'],
0x7fa45956d000,
0x7fa45976d000,
0x001bf000)
self.assertEqual(desc['filename'][4],
b"/lib/x86_64-linux-gnu/libc-2.23.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][5],
desc['page_size'],
0x7fa45976d000,
0x7fa459771000,
0x001bf000)
self.assertEqual(desc['filename'][5],
b"/lib/x86_64-linux-gnu/libc-2.23.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][6],
desc['page_size'],
0x7fa459771000,
0x7fa459773000,
0x001c3000)
self.assertEqual(desc['filename'][6],
b"/lib/x86_64-linux-gnu/libc-2.23.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][7],
desc['page_size'],
0x7fa459777000,
0x7fa45979d000,
0x00000000)
self.assertEqual(desc['filename'][7],
b"/lib/x86_64-linux-gnu/ld-2.23.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][8],
desc['page_size'],
0x7fa45999c000,
0x7fa45999d000,
0x00025000)
self.assertEqual(desc['filename'][8],
b"/lib/x86_64-linux-gnu/ld-2.23.so")
self.validate_nt_file_entry(desc['Elf_Nt_File_Entry'][9],
desc['page_size'],
0x7fa45999d000,
0x7fa45999e000,
0x00026000)
self.assertEqual(desc['filename'][9],
b"/lib/x86_64-linux-gnu/ld-2.23.so")
self.assertTrue(nt_file_found)
def validate_nt_file_entry(self,
entry,
page_size,
expected_vm_start,
expected_vm_end,
expected_page_offset):
self.assertEqual(entry.vm_start, expected_vm_start)
self.assertEqual(entry.vm_end, expected_vm_end)
self.assertEqual(entry.page_offset * page_size, expected_page_offset)
@classmethod
def tearDownClass(cls):
cls._core_file.close()
|
