def value_api(self, exe_name):
"""Exercise some SBValue APIs."""
exe = os.path.join(os.getcwd(), exe_name)
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Create the breakpoint inside function 'main'.
breakpoint = target.BreakpointCreateByLocation('main.c', self.line)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
# Now launch the process, and do not stop at entry point.
process = target.LaunchSimple (None, None, self.get_process_working_directory())
self.assertTrue(process, PROCESS_IS_VALID)
# Get Frame #0.
self.assertTrue(process.GetState() == lldb.eStateStopped)
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint condition")
frame0 = thread.GetFrameAtIndex(0)
# Get global variable 'days_of_week'.
list = target.FindGlobalVariables('days_of_week', 1)
days_of_week = list.GetValueAtIndex(0)
self.assertTrue(days_of_week, VALID_VARIABLE)
self.assertTrue(days_of_week.GetNumChildren() == 7, VALID_VARIABLE)
self.DebugSBValue(days_of_week)
# Get global variable 'weekdays'.
list = target.FindGlobalVariables('weekdays', 1)
weekdays = list.GetValueAtIndex(0)
self.assertTrue(weekdays, VALID_VARIABLE)
self.assertTrue(weekdays.GetNumChildren() == 5, VALID_VARIABLE)
self.DebugSBValue(weekdays)
# Get global variable 'g_table'.
list = target.FindGlobalVariables('g_table', 1)
g_table = list.GetValueAtIndex(0)
self.assertTrue(g_table, VALID_VARIABLE)
self.assertTrue(g_table.GetNumChildren() == 2, VALID_VARIABLE)
self.DebugSBValue(g_table)
fmt = lldbutil.BasicFormatter()
cvf = lldbutil.ChildVisitingFormatter(indent_child=2)
rdf = lldbutil.RecursiveDecentFormatter(indent_child=2)
if self.TraceOn():
print fmt.format(days_of_week)
print cvf.format(days_of_week)
print cvf.format(weekdays)
print rdf.format(g_table)
# Get variable 'my_int_ptr'.
value = frame0.FindVariable('my_int_ptr')
self.assertTrue(value, VALID_VARIABLE)
self.DebugSBValue(value)
# Get what 'my_int_ptr' points to.
pointed = value.GetChildAtIndex(0)
self.assertTrue(pointed, VALID_VARIABLE)
self.DebugSBValue(pointed)
# While we are at it, verify that 'my_int_ptr' points to 'g_my_int'.
symbol = target.ResolveLoadAddress(int(pointed.GetLocation(), 0)).GetSymbol()
self.assertTrue(symbol)
self.expect(symbol.GetName(), exe=False,
startstr = 'g_my_int')
# Get variable 'str_ptr'.
value = frame0.FindVariable('str_ptr')
self.assertTrue(value, VALID_VARIABLE)
self.DebugSBValue(value)
# SBValue::TypeIsPointerType() should return true.
self.assertTrue(value.TypeIsPointerType())
# Verify the SBValue::GetByteSize() API is working correctly.
arch = self.getArchitecture()
if arch == 'i386':
self.assertTrue(value.GetByteSize() == 4)
elif arch == 'x86_64':
self.assertTrue(value.GetByteSize() == 8)
# Get child at index 5 => 'Friday'.
child = value.GetChildAtIndex(5, lldb.eNoDynamicValues, True)
self.assertTrue(child, VALID_VARIABLE)
self.DebugSBValue(child)
self.expect(child.GetSummary(), exe=False,
substrs = ['Friday'])
# Now try to get at the same variable using GetValueForExpressionPath().
# These two SBValue objects should have the same value.
val2 = value.GetValueForExpressionPath('[5]')
self.assertTrue(val2, VALID_VARIABLE)
self.DebugSBValue(val2)
self.assertTrue(child.GetValue() == val2.GetValue() and
child.GetSummary() == val2.GetSummary())
val_i = target.EvaluateExpression('i')
val_s = target.EvaluateExpression('s')
val_a = target.EvaluateExpression('a')
self.assertTrue(val_s.GetChildMemberWithName('a').AddressOf(), VALID_VARIABLE)
self.assertTrue(val_a.Cast(val_i.GetType()).AddressOf(), VALID_VARIABLE)
def linked_list_api(self, exe_name):
"""Exercise SBValue API linked_list-iter."""
exe = os.path.join(os.getcwd(), exe_name)
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Create the breakpoint inside function 'main'.
breakpoint = target.BreakpointCreateByLocation('main.cpp', self.line)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
# Now launch the process, and do not stop at entry point.
process = target.LaunchSimple(None, None,
self.get_process_working_directory())
self.assertTrue(process, PROCESS_IS_VALID)
# Get Frame #0.
self.assertTrue(process.GetState() == lldb.eStateStopped)
thread = lldbutil.get_stopped_thread(process,
lldb.eStopReasonBreakpoint)
self.assertTrue(
thread.IsValid(),
"There should be a thread stopped due to breakpoint condition")
frame0 = thread.GetFrameAtIndex(0)
# Get variable 'task_head'.
task_head = frame0.FindVariable('task_head')
self.assertTrue(task_head, VALID_VARIABLE)
self.DebugSBValue(task_head)
# By design (see main.cpp), the visited id's are: [1, 2, 4, 5].
visitedIDs = [1, 2, 4, 5]
list = []
cvf = lldbutil.ChildVisitingFormatter(indent_child=2)
for t in task_head.linked_list_iter('next'):
self.assertTrue(t, VALID_VARIABLE)
# Make sure that 'next' corresponds to an SBValue with pointer type.
self.assertTrue(t.TypeIsPointerType())
if self.TraceOn():
print cvf.format(t)
list.append(int(t.GetChildMemberWithName("id").GetValue()))
# Sanity checks that the we visited all the items (no more, no less).
if self.TraceOn():
print "visited IDs:", list
self.assertTrue(visitedIDs == list)
# Let's exercise the linked_list_iter() API again, this time supplying
# our end of list test function.
def eol(val):
"""Test function to determine end of list."""
# End of list is reached if either the value object is invalid
# or it corresponds to a null pointer.
if not val or int(val.GetValue(), 16) == 0:
return True
# Also check the "id" for correct semantics. If id <= 0, the item
# is corrupted, let's return True to signify end of list.
if int(val.GetChildMemberWithName("id").GetValue(), 0) <= 0:
return True
# Otherwise, return False.
return False
list = []
for t in task_head.linked_list_iter('next', eol):
self.assertTrue(t, VALID_VARIABLE)
# Make sure that 'next' corresponds to an SBValue with pointer type.
self.assertTrue(t.TypeIsPointerType())
if self.TraceOn():
print cvf.format(t)
list.append(int(t.GetChildMemberWithName("id").GetValue()))
# Sanity checks that the we visited all the items (no more, no less).
if self.TraceOn():
print "visited IDs:", list
self.assertTrue(visitedIDs == list)
# Get variable 'empty_task_head'.
empty_task_head = frame0.FindVariable('empty_task_head')
self.assertTrue(empty_task_head, VALID_VARIABLE)
self.DebugSBValue(empty_task_head)
list = []
# There is no iterable item from empty_task_head.linked_list_iter().
for t in empty_task_head.linked_list_iter('next', eol):
if self.TraceOn():
print cvf.format(t)
list.append(int(t.GetChildMemberWithName("id").GetValue()))
self.assertTrue(len(list) == 0)
# Get variable 'task_evil'.
task_evil = frame0.FindVariable('task_evil')
self.assertTrue(task_evil, VALID_VARIABLE)
self.DebugSBValue(task_evil)
list = []
# There 3 iterable items from task_evil.linked_list_iter(). :-)
for t in task_evil.linked_list_iter('next'):
if self.TraceOn():
print cvf.format(t)
list.append(int(t.GetChildMemberWithName("id").GetValue()))
self.assertTrue(len(list) == 3)