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"""Show bitfields and check that they display correctly."""
import os, time
import unittest2
import lldb
from lldbtest import *
class BitfieldsTestCase(TestBase):
mydir = "bitfields"
@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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")
def test_with_dsym_and_python_api(self):
"""Use Python APIs to inspect a bitfields variable."""
self.buildDsym()
self.bitfields_variable_python()
def test_with_dwarf_and_run_command(self):
"""Test 'frame variable ...' on a variable with bitfields."""
self.buildDwarf()
self.bitfields_variable()
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.
self.expect("breakpoint set -f main.c -l %d" % self.line,
BREAKPOINT_CREATED,
startstr = "Breakpoint created: 1: file ='main.c', line = %d, locations = 1" %
self.line)
self.runCmd("run", RUN_SUCCEEDED)
# The stop reason of the thread should be breakpoint.
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs = ['state is stopped',
'stop reason = breakpoint'])
# The breakpoint should have a hit count of 1.
self.expect("breakpoint list", BREAKPOINT_HIT_ONCE,
substrs = [' resolved, hit count = 1'])
# This should display correctly.
self.expect("frame variable -t bits", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['(uint32_t:1) b1 = 1',
'(uint32_t:2) b2 = 3',
'(uint32_t:3) b3 = 7',
'(uint32_t:4) 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 -t", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ['(uint32_t:1) b1 = 1',
'(uint32_t:2) b2 = 3',
'(uint32_t:3) b3 = 7',
'(uint32_t:4) b4 = 15',
'(uint32_t:5) b5 = 31',
'(uint32_t:6) b6 = 63',
'(uint32_t:7) b7 = 127',
'(uint32_t:4) four = 15'])
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.IsValid(), VALID_TARGET)
breakpoint = target.BreakpointCreateByLocation("main.c", self.line)
self.assertTrue(breakpoint.IsValid(), VALID_BREAKPOINT)
self.runCmd("run", RUN_SUCCEEDED, setCookie=False)
# This does not work, and results in the process stopped at dyld_start?
#process = target.LaunchProcess([''], [''], os.ctermid(), False)
self.process = target.GetProcess()
self.assertTrue(self.process.IsValid(), PROCESS_IS_VALID)
# The stop reason of the thread should be breakpoint.
from lldbutil import StopReasonString
thread = target.GetProcess().GetThreadAtIndex(0)
self.assertTrue(thread.GetStopReason() == lldb.eStopReasonBreakpoint,
STOPPED_DUE_TO_BREAKPOINT_WITH_STOP_REASON_AS % StopReasonString(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.LookupVar("bits")
self.DebugSBValue(frame, bits)
self.assertTrue(bits.GetTypeName() == "Bits" and
bits.GetNumChildren() == 8 and
bits.GetByteSize() == 4,
"(Bits)bits with byte size of 4 and 8 children")
# Notice the pattern of int(b1.GetValue(frame), 0). We pass a base of 0
# so that the proper radix is determined based on the contents of the
# string.
b1 = bits.GetChildAtIndex(0)
self.DebugSBValue(frame, b1)
self.assertTrue(b1.GetName() == "b1" and
b1.GetTypeName() == "uint32_t:1" and
b1.IsInScope(frame) and
int(b1.GetValue(frame), 0) == 1,
'bits.b1 has type uint32_t:1, is in scope, and == 1')
b7 = bits.GetChildAtIndex(6)
self.DebugSBValue(frame, b7)
self.assertTrue(b7.GetName() == "b7" and
b7.GetTypeName() == "uint32_t:7" and
b7.IsInScope(frame) and
int(b7.GetValue(frame), 0) == 127,
'bits.b7 has type uint32_t:7, is in scope, and == 127')
four = bits.GetChildAtIndex(7)
self.DebugSBValue(frame, four)
self.assertTrue(four.GetName() == "four" and
four.GetTypeName() == "uint32_t:4" and
four.IsInScope(frame) and
int(four.GetValue(frame), 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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