def test_trailing_nops(self):
old, new = self.read_anon_namespace_files()
FNNAME = 'loops_state_set(unsigned int)'
oldfn = old.functions[FNNAME]
newfn = new.functions[FNNAME]
self.assertEqual(oldfn.padding, [])
self.assertEqual(newfn.padding, [Instruction(0x353, [144], 'nop')])
self.assertTrue(fn_equal(oldfn, newfn))
def test_trailing_nops(self):
old, new = self.read_anon_namespace_files()
FNNAME = 'loops_state_set(unsigned int)'
oldfn = old.functions[FNNAME]
newfn = new.functions[FNNAME]
self.assertEqual(oldfn.padding, [])
self.assertEqual(newfn.padding, [Instruction(0x353, [144], 'nop')])
self.assertTrue(fn_equal(oldfn, newfn))
def test_adding_anon_namespace(self):
old, new = self.read_anon_namespace_files()
peers = FunctionMatchupSet(old, new)
self.assertEqual(peers.gone, [])
self.assertEqual(peers.appeared, [])
oldfn = old.get_demangled_function(
'tracer_state::find_trace(basic_block_def*, basic_block_def**)')
self.assertIn(oldfn, peers.old_to_new)
newfn = peers.old_to_new[oldfn]
self.assertEqual(
newfn.demangled,
'(anonymous namespace)::tracer_state::find_trace(basic_block_def*, basic_block_def**)')
oldfn = old.functions['gate_tracer()']
newfn = new.functions['gate_tracer()']
self.assertTrue(fn_equal(oldfn, newfn))
# Some functions move from their own sections to the .text section:
oldfn = old.get_demangled_function(
'tracer_state::bb_seen_p(basic_block_def*)')
self.assertIn(oldfn, peers.old_to_new)
newfn = peers.old_to_new[oldfn]
self.assertEqual(
newfn.demangled,
'(anonymous namespace)::tracer_state::bb_seen_p(basic_block_def*)')
self.assertEqual(oldfn.section.name,
'.text._ZN12tracer_state9bb_seen_pEP15basic_block_def')
self.assertEqual(oldfn.offset, 0x0)
self.assertEqual(newfn.section.name, '.text')
self.assertEqual(newfn.offset, 0x3b6)
# Currently bb_seen_p is reported as having changed, purely due to
# the following 5-byte instruction:
#
# FN+0x1f: Old: callq THIS_FN+0x24
# : New: callq <bitmap_bit_p(simple_bitmap_def const*, int)>
# Old: e8 00 00 00 00
# New: e8 c8 fd ff ff
# In the old function, bitmap_bit_p is in a different section,
# whereas in the new they are both in the .text section.
# Presumably in the old object this call gets patched based on where
# the callee ends up
# Ultimately we need "objdump -r" to see the relocations
old_callq = oldfn.get_instr_at_relative_offset(0x1f)
new_callq = newfn.get_instr_at_relative_offset(0x1f)
self.assertEqual(old_callq.disasm,
'callq THIS_FN+0x24')
self.assertEqual(new_callq.disasm,
'callq <bitmap_bit_p(simple_bitmap_def const*, int)>')
out = self.get_diff(old, new)
self.assertIn('Old: tracer.o\n', out)
self.assertIn('New: tracer.o\n', out)
self.assertIn(' Unchanged function: ei_container(edge_iterator)\n', out)
self.assertIn(('\n'
' Unchanged function: gate_tracer()\n'
' (moved offset within .text from 0x11a8 to 0x1236)\n'),
out)
self.assertIn(('\n'
' Unchanged function: tracer_state::find_best_successor(basic_block_def*)\n'
' (renamed to (anonymous namespace)::tracer_state::find_best_successor(basic_block_def*))\n'
' (moved offset within .text from 0x560 to 0x5ee)\n'),
out)
# tracer_state::bb_seen_p(basic_block_def*):
self.assertIn(' (moved from .text._ZN12tracer_state9bb_seen_pEP15basic_block_def+0x0 to .text+0x3b6)',
out)
def test_adding_anon_namespace(self):
old, new = self.read_anon_namespace_files()
peers = FunctionMatchupSet(old, new)
self.assertEqual(peers.gone, [])
self.assertEqual(peers.appeared, [])
oldfn = old.get_demangled_function(
'tracer_state::find_trace(basic_block_def*, basic_block_def**)')
self.assertIn(oldfn, peers.old_to_new)
newfn = peers.old_to_new[oldfn]
self.assertEqual(
newfn.demangled,
'(anonymous namespace)::tracer_state::find_trace(basic_block_def*, basic_block_def**)'
)
oldfn = old.functions['gate_tracer()']
newfn = new.functions['gate_tracer()']
self.assertTrue(fn_equal(oldfn, newfn))
# Some functions move from their own sections to the .text section:
oldfn = old.get_demangled_function(
'tracer_state::bb_seen_p(basic_block_def*)')
self.assertIn(oldfn, peers.old_to_new)
newfn = peers.old_to_new[oldfn]
self.assertEqual(
newfn.demangled,
'(anonymous namespace)::tracer_state::bb_seen_p(basic_block_def*)')
self.assertEqual(
oldfn.section.name,
'.text._ZN12tracer_state9bb_seen_pEP15basic_block_def')
self.assertEqual(oldfn.offset, 0x0)
self.assertEqual(newfn.section.name, '.text')
self.assertEqual(newfn.offset, 0x3b6)
# Currently bb_seen_p is reported as having changed, purely due to
# the following 5-byte instruction:
#
# FN+0x1f: Old: callq THIS_FN+0x24
# : New: callq <bitmap_bit_p(simple_bitmap_def const*, int)>
# Old: e8 00 00 00 00
# New: e8 c8 fd ff ff
# In the old function, bitmap_bit_p is in a different section,
# whereas in the new they are both in the .text section.
# Presumably in the old object this call gets patched based on where
# the callee ends up
# Ultimately we need "objdump -r" to see the relocations
old_callq = oldfn.get_instr_at_relative_offset(0x1f)
new_callq = newfn.get_instr_at_relative_offset(0x1f)
self.assertEqual(old_callq.disasm, 'callq THIS_FN+0x24')
self.assertEqual(
new_callq.disasm,
'callq <bitmap_bit_p(simple_bitmap_def const*, int)>')
out = self.get_diff(old, new)
self.assertIn('Old: tracer.o\n', out)
self.assertIn('New: tracer.o\n', out)
self.assertIn(' Unchanged function: ei_container(edge_iterator)\n',
out)
self.assertIn(
('\n'
' Unchanged function: gate_tracer()\n'
' (moved offset within .text from 0x11a8 to 0x1236)\n'), out)
self.assertIn((
'\n'
' Unchanged function: tracer_state::find_best_successor(basic_block_def*)\n'
' (renamed to (anonymous namespace)::tracer_state::find_best_successor(basic_block_def*))\n'
' (moved offset within .text from 0x560 to 0x5ee)\n'), out)
# tracer_state::bb_seen_p(basic_block_def*):
self.assertIn(
' (moved from .text._ZN12tracer_state9bb_seen_pEP15basic_block_def+0x0 to .text+0x3b6)',
out)
