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- #!/usr/bin/env vpython3
- # Copyright 2015 The Chromium Authors. All rights reserved.
- # Use of this source code is governed by a BSD-style license that can be
- # found in the LICENSE file.
- import unittest
- import symbol_extractor
- # The number of spaces that objdump prefixes each symbol with.
- SPACES = ' ' * 14
- class TestLlvmBitcodeSymbolExtractor(unittest.TestCase):
- def testBasicParsing(self):
- data = '''-------- T _ZN4base11GetFileSizeERKNS_8FilePathEPx
- aaaaaaaa W _ZNKSt3__19basic_iosIcNS_11char_traitsIcEEE5widenEc
- -------- T _ZN4base13ContentsEqualERKNS_8FilePathES2_
- ---------------- T _SymbolWithA64BitAddress_
- 00000000 W _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE11__read_modeEv'''
- lines = data.split('\n')
- symbol_names = symbol_extractor._SymbolInfosFromLlvmNm(lines)
- self.assertEqual(5, len(symbol_names))
- self.assertListEqual(
- ['_ZN4base11GetFileSizeERKNS_8FilePathEPx',
- '_ZNKSt3__19basic_iosIcNS_11char_traitsIcEEE5widenEc',
- '_ZN4base13ContentsEqualERKNS_8FilePathES2_',
- '_SymbolWithA64BitAddress_',
- '_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE11__read_modeEv'],
- symbol_names)
- class TestSymbolInfo(unittest.TestCase):
- def testIgnoresBlankLine(self):
- symbol_info = symbol_extractor._FromObjdumpLine('')
- self.assertIsNone(symbol_info)
- def testIgnoresMalformedLine(self):
- # This line is too short: only 6 flags.
- line = ('00c1b228 F .text\t00000060' + SPACES + '_ZN20trace_event')
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNone(symbol_info)
- def testWrongSymbolType(self):
- # This line has unsupported 'f' as symbol type.
- line = '00c1b228 l f .text\t00000060' + SPACES + '_ZN20trace_event'
- self.assertRaises(AssertionError, symbol_extractor._FromObjdumpLine, line)
- def testAssertionErrorOnInvalidLines(self):
- # This line has an invalid scope.
- line = ('00c1b228 z F .text\t00000060' + SPACES + '_ZN20trace_event')
- self.assertRaises(AssertionError, symbol_extractor._FromObjdumpLine, line)
- # This line has the symbol name with spaces in it.
- line = ('00c1b228 l F .text\t00000060' + SPACES +
- '_ZN20trace_event too many')
- self.assertRaises(AssertionError, symbol_extractor._FromObjdumpLine, line)
- # This line has invalid characters in the symbol name.
- line = ('00c1b228 l F .text\t00000060' + SPACES + '_ZN20trace_?bad')
- self.assertRaises(AssertionError, symbol_extractor._FromObjdumpLine, line)
- # This line has an invalid character at the start of the symbol name.
- line = ('00c1b228 l F .text\t00000060' + SPACES + '$_ZN20trace_bad')
- self.assertRaises(AssertionError, symbol_extractor._FromObjdumpLine, line)
- def testSymbolTypeObject(self):
- # Builds with ThinLTO produce symbols of type 'O'.
- line = ('009faf60 l O .text\t00000500' + SPACES + 'AES_Td')
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNotNone(symbol_info)
- self.assertEquals(0x009faf60, symbol_info.offset)
- self.assertEquals('.text', symbol_info.section)
- self.assertEquals(0x500, symbol_info.size)
- self.assertEquals('AES_Td', symbol_info.name)
- def testSymbolFromLocalLabel(self):
- line = ('00f64b80 l .text\t00000000' + SPACES + 'Builtins_Abort')
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNone(symbol_info)
- def testStartOfText(self):
- line = ('00918000 l .text\t00000000' + SPACES +
- '.hidden linker_script_start_of_text')
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNotNone(symbol_info)
- self.assertEquals(0x00918000, symbol_info.offset)
- self.assertEquals('linker_script_start_of_text', symbol_info.name)
- def testSymbolInfo(self):
- line = ('00c1c05c l F .text\t0000002c' + SPACES +
- '_GLOBAL__sub_I_chrome_main_delegate.cc')
- test_name = '_GLOBAL__sub_I_chrome_main_delegate.cc'
- test_offset = 0x00c1c05c
- test_size = 0x2c
- test_section = '.text'
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNotNone(symbol_info)
- self.assertEquals(test_offset, symbol_info.offset)
- self.assertEquals(test_size, symbol_info.size)
- self.assertEquals(test_name, symbol_info.name)
- self.assertEquals(test_section, symbol_info.section)
- def testHiddenSymbol(self):
- line = ('00c1c05c l F .text\t0000002c' + SPACES +
- '.hidden _GLOBAL__sub_I_chrome_main_delegate.cc')
- test_name = '_GLOBAL__sub_I_chrome_main_delegate.cc'
- test_offset = 0x00c1c05c
- test_size = 0x2c
- test_section = '.text'
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNotNone(symbol_info)
- self.assertEquals(test_offset, symbol_info.offset)
- self.assertEquals(test_size, symbol_info.size)
- self.assertEquals(test_name, symbol_info.name)
- self.assertEquals(test_section, symbol_info.section)
- def testDollarInSymbolName(self):
- # A $ character elsewhere in the symbol name is fine.
- # This is an example of a lambda function name from Clang.
- line = ('00c1b228 l F .text\t00000060' + SPACES +
- '_ZZL11get_globalsvENK3$_1clEv')
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNotNone(symbol_info)
- self.assertEquals(0xc1b228, symbol_info.offset)
- self.assertEquals(0x60, symbol_info.size)
- self.assertEquals('_ZZL11get_globalsvENK3$_1clEv', symbol_info.name)
- self.assertEquals('.text', symbol_info.section)
- def testOutlinedFunction(self):
- # Test that an outlined function is reported normally. Also note that
- # outlined functions are in 64 bit builds which have longer addresses.
- line = ('00000000020fab4c l F .text\t0000000000000014' + SPACES +
- 'OUTLINED_FUNCTION_4')
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNotNone(symbol_info)
- self.assertEquals(0x20fab4c, symbol_info.offset)
- self.assertEquals(0x14, symbol_info.size)
- self.assertEquals('OUTLINED_FUNCTION_4', symbol_info.name)
- self.assertEquals('.text', symbol_info.section)
- def testNeitherLocalNorGlobalSymbol(self):
- # This happens, see crbug.com/992884.
- # Symbol which is neither local nor global.
- line = '0287ae50 w F .text\t000001e8 log2l'
- symbol_info = symbol_extractor._FromObjdumpLine(line)
- self.assertIsNotNone(symbol_info)
- self.assertEquals(0x287ae50, symbol_info.offset)
- self.assertEquals(0x1e8, symbol_info.size)
- self.assertEquals('log2l', symbol_info.name)
- self.assertEquals('.text', symbol_info.section)
- class TestSymbolInfosFromStream(unittest.TestCase):
- def testSymbolInfosFromStream(self):
- lines = ['Garbage',
- '',
- '00c1c05c l F .text\t0000002c' + SPACES + 'first',
- ''
- 'more garbage',
- '00155 g F .text\t00000012' + SPACES + 'second']
- symbol_infos = symbol_extractor._SymbolInfosFromStream(lines)
- self.assertEquals(len(symbol_infos), 2)
- first = symbol_extractor.SymbolInfo('first', 0x00c1c05c, 0x2c, '.text')
- self.assertEquals(first, symbol_infos[0])
- second = symbol_extractor.SymbolInfo('second', 0x00155, 0x12, '.text')
- self.assertEquals(second, symbol_infos[1])
- class TestSymbolInfoMappings(unittest.TestCase):
- def setUp(self):
- self.symbol_infos = [
- symbol_extractor.SymbolInfo('firstNameAtOffset', 0x42, 42, '.text'),
- symbol_extractor.SymbolInfo('secondNameAtOffset', 0x42, 42, '.text'),
- symbol_extractor.SymbolInfo('thirdSymbol', 0x64, 20, '.text')]
- def testGroupSymbolInfosByOffset(self):
- offset_to_symbol_info = symbol_extractor.GroupSymbolInfosByOffset(
- self.symbol_infos)
- self.assertEquals(len(offset_to_symbol_info), 2)
- self.assertIn(0x42, offset_to_symbol_info)
- self.assertEquals(offset_to_symbol_info[0x42][0], self.symbol_infos[0])
- self.assertEquals(offset_to_symbol_info[0x42][1], self.symbol_infos[1])
- self.assertIn(0x64, offset_to_symbol_info)
- self.assertEquals(offset_to_symbol_info[0x64][0], self.symbol_infos[2])
- def testCreateNameToSymbolInfo(self):
- name_to_symbol_info = symbol_extractor.CreateNameToSymbolInfo(
- self.symbol_infos)
- self.assertEquals(len(name_to_symbol_info), 3)
- for i in range(3):
- name = self.symbol_infos[i].name
- self.assertIn(name, name_to_symbol_info)
- self.assertEquals(self.symbol_infos[i], name_to_symbol_info[name])
- def testSymbolCollisions(self):
- symbol_infos_with_collision = list(self.symbol_infos)
- symbol_infos_with_collision.append(symbol_extractor.SymbolInfo(
- 'secondNameAtOffset', 0x84, 42, '.text'))
- # The symbol added above should not affect the output.
- name_to_symbol_info = symbol_extractor.CreateNameToSymbolInfo(
- self.symbol_infos)
- self.assertEquals(len(name_to_symbol_info), 3)
- for i in range(3):
- name = self.symbol_infos[i].name
- self.assertIn(name, name_to_symbol_info)
- self.assertEquals(self.symbol_infos[i], name_to_symbol_info[name])
- if __name__ == '__main__':
- unittest.main()
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