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"""Show bitfields and check that they display correctly."""
import os, time
import unittest2
import lldb
from lldbtest import *
import lldbutil
class BitfieldsTestCase(TestBase):
mydir = os.path.join("lang", "c", "bitfields")
@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
@dsym_test
def test_with_dsym_and_run_command(self):
"""Test 'frame variable ...' on a variable with bitfields."""
self.buildDsym()
self.bitfields_variable()
@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
@python_api_test
@dsym_test
def test_with_dsym_and_python_api(self):
"""Use Python APIs to inspect a bitfields variable."""
self.buildDsym()
self.bitfields_variable_python()
@dwarf_test
def test_with_dwarf_and_run_command(self):
"""Test 'frame variable ...' on a variable with bitfields."""
self.buildDwarf()
self.bitfields_variable()
@python_api_test
@dwarf_test
@expectedFailureGcc # GCC (4.6/4.7) generates incorrect code with unnamed bitfields.
def test_with_dwarf_and_python_api(self):
"""Use Python APIs to inspect a bitfields variable."""
self.buildDwarf()
self.bitfields_variable_python()
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break inside main().
self.line = line_number('main.c', '// Set break point at this line.')
def bitfields_variable(self):
"""Test 'frame variable ...' on a variable with bitfields."""
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# Break inside the main.
lldbutil.run_break_set_by_file_and_line (self, "main.c", self.line, num_expected_locations=1, loc_exact=True)
self.runCmd("run", RUN_SUCCEEDED)
# The stop reason of the thread should be breakpoint.
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs = ['stopped',
'stop reason = breakpoint'])
# The breakpoint should have a hit count of 1.
self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
substrs = [' resolved, hit count = 1'])
# This should display correctly.
self.expect("frame variable --show-types bits", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['(uint32_t:1) b1 = 1',
'(uint32_t:2) b2 = 3',
'(uint32_t:3) b3 = 7',
'(uint32_t) b4 = 15',
'(uint32_t:5) b5 = 31',
'(uint32_t:6) b6 = 63',
'(uint32_t:7) b7 = 127',
'(uint32_t:4) four = 15'])
# And so should this.
# rdar://problem/8348251
self.expect("frame variable --show-types", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['(uint32_t:1) b1 = 1',
'(uint32_t:2) b2 = 3',
'(uint32_t:3) b3 = 7',
'(uint32_t) b4 = 15',
'(uint32_t:5) b5 = 31',
'(uint32_t:6) b6 = 63',
'(uint32_t:7) b7 = 127',
'(uint32_t:4) four = 15'])
self.expect("expr (bits.b1)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '1'])
self.expect("expr (bits.b2)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '3'])
self.expect("expr (bits.b3)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '7'])
self.expect("expr (bits.b4)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '15'])
self.expect("expr (bits.b5)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '31'])
self.expect("expr (bits.b6)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '63'])
self.expect("expr (bits.b7)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '127'])
self.expect("expr (bits.four)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '15'])
self.expect("frame variable --show-types more_bits", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['(uint32_t:3) a = 3',
'(uint8_t:1) b = \'\\0\'',
'(uint8_t:1) c = \'\\x01\'',
'(uint8_t:1) d = \'\\0\''])
self.expect("expr (more_bits.a)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint32_t', '3'])
self.expect("expr (more_bits.b)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint8_t', '\\0'])
self.expect("expr (more_bits.c)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint8_t', '\\x01'])
self.expect("expr (more_bits.d)", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['uint8_t', '\\0'])
def bitfields_variable_python(self):
"""Use Python APIs to inspect a bitfields variable."""
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByLocation("main.c", self.line)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
process = target.LaunchSimple(None, None, os.getcwd())
self.assertTrue(process, PROCESS_IS_VALID)
# The stop reason of the thread should be breakpoint.
thread = target.GetProcess().GetThreadAtIndex(0)
if thread.GetStopReason() != lldb.eStopReasonBreakpoint:
from lldbutil import stop_reason_to_str
self.fail(STOPPED_DUE_TO_BREAKPOINT_WITH_STOP_REASON_AS %
stop_reason_to_str(thread.GetStopReason()))
# The breakpoint should have a hit count of 1.
self.assertTrue(breakpoint.GetHitCount() == 1, BREAKPOINT_HIT_ONCE)
# Lookup the "bits" variable which contains 8 bitfields.
frame = thread.GetFrameAtIndex(0)
bits = frame.FindVariable("bits")
self.DebugSBValue(bits)
self.assertTrue(bits.GetTypeName() == 'Bits', "bits.GetTypeName() == 'Bits'");
self.assertTrue(bits.GetNumChildren() == 10, "bits.GetNumChildren() == 10");
self.assertTrue(bits.GetByteSize() == 32, "bits.GetByteSize() == 32");
# Notice the pattern of int(b1.GetValue(), 0). We pass a base of 0
# so that the proper radix is determined based on the contents of the
# string.
b1 = bits.GetChildMemberWithName("b1")
self.DebugSBValue(b1)
self.assertTrue(b1.GetName() == "b1" and
b1.GetTypeName() == "uint32_t:1" and
b1.IsInScope() and
int(b1.GetValue(), 0) == 1,
'bits.b1 has type uint32_t:1, is in scope, and == 1')
b7 = bits.GetChildMemberWithName("b7")
self.DebugSBValue(b7)
self.assertTrue(b7.GetName() == "b7" and
b7.GetTypeName() == "uint32_t:7" and
b7.IsInScope() and
int(b7.GetValue(), 0) == 127,
'bits.b7 has type uint32_t:7, is in scope, and == 127')
four = bits.GetChildMemberWithName("four")
self.DebugSBValue(four)
self.assertTrue(four.GetName() == "four" and
four.GetTypeName() == "uint32_t:4" and
four.IsInScope() and
int(four.GetValue(), 0) == 15,
'bits.four has type uint32_t:4, is in scope, and == 15')
# Now kill the process, and we are done.
rc = target.GetProcess().Kill()
self.assertTrue(rc.Success())
if __name__ == '__main__':
import atexit
lldb.SBDebugger.Initialize()
atexit.register(lambda: lldb.SBDebugger.Terminate())
unittest2.main()
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