#!/usr/bin/env python3
# Copyright 2021 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import unittest
import dwarfdump
class DwarfDumpTest(unittest.TestCase):
def _MakeRangeInfoList(self, flat_list):
out = []
for item in flat_list:
assert len(item) == 3
out.append((dwarfdump._AddressRange(item[0], item[1]), item[2]))
return out
def testParseNonContiguousAddressRange(self):
"""Test parsing DW_TAG_compile_unit with non-contiguous address range."""
lines = [
'DW_TAG_compile_unit',
'DW_AT_name ("solution.cc")',
'DW_AT_low_pc (0x0)',
'DW_AT_ranges (0x1',
'[0x10, 0x21)',
'[0x31, 0x41))',
]
expected_info_list = [(0x10, 0x21, 'solution.cc'),
(0x31, 0x41, 'solution.cc')]
self.assertEqual(self._MakeRangeInfoList(expected_info_list),
dwarfdump.ParseDumpOutputForTest(lines))
def testParseNonContiguousAddressRangeOtherBrackets(self):
"""Test parsing DW_AT_ranges when non-standard brackets are used."""
lines = [
'DW_TAG_compile_unit',
'DW_AT_name ("solution.cc")',
'DW_AT_low_pc (0x0)',
'DW_AT_ranges [0x1',
'(0x10, 0x21)',
'[0x31, 0x41]]',
]
expected_info_list = [(0x10, 0x21, 'solution.cc'),
(0x31, 0x41, 'solution.cc')]
self.assertEqual(self._MakeRangeInfoList(expected_info_list),
dwarfdump.ParseDumpOutputForTest(lines))
def testParseNonContiguousIgnoreEmptyRanges(self):
"""Test that empty ranges are ignored when parsing DW_AT_ranges."""
lines = [
'DW_TAG_compile_unit',
'DW_AT_name ("solution.cc")',
'DW_AT_ranges (0x1',
'[0x1, 0x1)',
'[0x10, 0x21)',
'[0x22, 0x22)',
'[0x31, 0x41)',
'[0x42, 0x42))',
]
expected_info_list = [(0x10, 0x21, 'solution.cc'),
(0x31, 0x41, 'solution.cc')]
self.assertEqual(self._MakeRangeInfoList(expected_info_list),
dwarfdump.ParseDumpOutputForTest(lines))
def testParseContiguousAddressRange(self):
"""Test parsing DW_TAG_compile_unit with contiguous address range."""
lines = [
'DW_TAG_compile_unit',
'DW_AT_name ("solution.cc")',
'DW_AT_low_pc (0x1)',
'DW_AT_high_pc (0x10)',
]
expected_info_list = [
(0x1, 0x10, 'solution.cc'),
]
self.assertEqual(self._MakeRangeInfoList(expected_info_list),
dwarfdump.ParseDumpOutputForTest(lines))
def testParseSingleAddress(self):
"""Test parsing DW_TAG_compile_unit with single address."""
lines = [
'DW_TAG_compile_unit',
'DW_AT_name ("solution.cc")',
'DW_AT_low_pc (0x10)',
]
expected_info_list = [
(0x10, 0x11, 'solution.cc'),
]
self.assertEqual(self._MakeRangeInfoList(expected_info_list),
dwarfdump.ParseDumpOutputForTest(lines))
def testParseEmptyCompileUnit(self):
"""Test parsing empty DW_TAG_compile_unit."""
lines = ['DW_TAG_compile_unit']
self.assertEqual([], dwarfdump.ParseDumpOutputForTest(lines))
def testConsecutiveCompileUnits(self):
"""Test parsing consecutive DW_TAG_compile_units."""
lines = [
'DW_TAG_compile_unit',
'DW_AT_name ("foo.cc")',
'DW_AT_low_pc (0x1)',
'DW_AT_high_pc (0x10)',
'DW_TAG_compile_unit',
'DW_AT_name ("bar.cc")',
'DW_AT_low_pc (0x12)',
'DW_AT_high_pc (0x20)',
]
expected_info_list = [(0x1, 0x10, 'foo.cc'), (0x12, 0x20, 'bar.cc')]
self.assertEqual(self._MakeRangeInfoList(expected_info_list),
dwarfdump.ParseDumpOutputForTest(lines))
def testTagTerminatedCompileUnit(self):
"""Test parsing DW_TAG_compile_unit where compile unit is followed by a
non-DW_TAG_compile_unit entry.
"""
lines = [
'DW_TAG_compile_unit',
'DW_AT_name ("foo.cc")',
'DW_AT_low_pc (0x1)',
'DW_AT_high_pc (0x10)',
'DW_TAG_subprogram',
'DW_AT_name ("bar.cc")',
'DW_AT_low_pc (0x12)',
'DW_AT_high_pc (0x20)',
]
expected_info_list = [
(0x1, 0x10, 'foo.cc'),
]
self.assertEqual(self._MakeRangeInfoList(expected_info_list),
dwarfdump.ParseDumpOutputForTest(lines))
def testHandlePrefixes(self):
"""Test parsing DW_TAG_compile_unit where 'DW_' does not start line in
DW_TAG_compile_unit entry.
"""
lines = [
'0x1 DW_TAG_compile_unit',
' DW_AT_language (DW_LANG_C_plus_plus_14)',
' DW_AT_name ("solution.cc")',
' DW_AT_stmt_list (0x5)',
' DW_AT_low_pc (0x1)',
' DW_AT_high_pc (0x10)',
]
expected_info_list = [
(0x1, 0x10, 'solution.cc'),
]
self.assertEqual(self._MakeRangeInfoList(expected_info_list),
dwarfdump.ParseDumpOutputForTest(lines))
def testFindAddress(self):
"""Tests for _SourceMapper.FindSourceForTextAddress()"""
lines = [
'DW_TAG_compile_unit',
'DW_AT_name ("foo.cc")',
'DW_AT_low_pc (0x1)',
'DW_AT_high_pc (0x10)',
'DW_TAG_compile_unit',
'DW_AT_name ("bar.cc")',
'DW_AT_low_pc (0x21)',
'DW_AT_high_pc (0x30)',
'DW_TAG_compile_unit',
'DW_AT_name ("baz.cc")',
'DW_AT_low_pc (0x41)',
'DW_AT_high_pc (0x50)',
]
source_mapper = dwarfdump.CreateAddressSourceMapperForTest(lines)
# Address is before first range.
self.assertEqual('', source_mapper.FindSourceForTextAddress(0x0))
# Address matches start of first range.
self.assertEqual('foo.cc', source_mapper.FindSourceForTextAddress(0x1))
# Address is in the middle of middle range.
self.assertEqual('bar.cc', source_mapper.FindSourceForTextAddress(0x2a))
# Address matches end of last range.
self.assertEqual('baz.cc', source_mapper.FindSourceForTextAddress(0x4f))
# Address is after lange range.
self.assertEqual('', source_mapper.FindSourceForTextAddress(0x50))
if __name__ == '__main__':
unittest.main()
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