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# encoding: utf-8
"""
Test lldb Obj-C exception support.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class ObjCExceptionsTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
@skipUnlessDarwin
def test_objc_exceptions_at_throw(self):
self.build()
target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
self.assertTrue(target, VALID_TARGET)
launch_info = lldb.SBLaunchInfo(["a.out", "0"])
lldbutil.run_to_name_breakpoint(self, "objc_exception_throw", launch_info=launch_info)
self.expect("thread list",
substrs=['stopped', 'stop reason = hit Objective-C exception'])
self.expect('thread exception', substrs=[
'(NSException *) exception = ',
'"SomeReason"',
])
target = self.dbg.GetSelectedTarget()
thread = target.GetProcess().GetSelectedThread()
frame = thread.GetSelectedFrame()
opts = lldb.SBVariablesOptions()
opts.SetIncludeRecognizedArguments(True)
variables = frame.GetVariables(opts)
self.assertEqual(variables.GetSize(), 1)
self.assertEqual(variables.GetValueAtIndex(0).name, "exception")
self.assertEqual(variables.GetValueAtIndex(0).GetValueType(), lldb.eValueTypeVariableArgument)
lldbutil.run_to_source_breakpoint(self, "// Set break point at this line.", lldb.SBFileSpec("main.mm"), launch_info=launch_info)
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs=['stopped', 'stop reason = breakpoint'])
target = self.dbg.GetSelectedTarget()
thread = target.GetProcess().GetSelectedThread()
frame = thread.GetSelectedFrame()
# No exception being currently thrown/caught at this point
self.assertFalse(thread.GetCurrentException().IsValid())
self.assertFalse(thread.GetCurrentExceptionBacktrace().IsValid())
self.expect(
'frame variable e1',
substrs=[
'(NSException *) e1 = ',
'"SomeReason"'
])
self.expect(
'frame variable --dynamic-type no-run-target *e1',
substrs=[
'(NSException) *e1 = ',
'name = ', '"ExceptionName"',
'reason = ', '"SomeReason"',
'userInfo = ', '1 key/value pair',
'reserved = ', 'nil',
])
e1 = frame.FindVariable("e1")
self.assertTrue(e1)
self.assertEqual(e1.type.name, "NSException *")
self.assertEqual(e1.GetSummary(), '"SomeReason"')
self.assertEqual(e1.GetChildMemberWithName("name").description, "ExceptionName")
self.assertEqual(e1.GetChildMemberWithName("reason").description, "SomeReason")
userInfo = e1.GetChildMemberWithName("userInfo").dynamic
self.assertEqual(userInfo.summary, "1 key/value pair")
self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(0).description, "some_key")
self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(1).description, "some_value")
self.assertEqual(e1.GetChildMemberWithName("reserved").description, "<nil>")
self.expect(
'frame variable e2',
substrs=[
'(NSException *) e2 = ',
'"SomeReason"'
])
self.expect(
'frame variable --dynamic-type no-run-target *e2',
substrs=[
'(NSException) *e2 = ',
'name = ', '"ThrownException"',
'reason = ', '"SomeReason"',
'userInfo = ', '1 key/value pair',
'reserved = ',
])
e2 = frame.FindVariable("e2")
self.assertTrue(e2)
self.assertEqual(e2.type.name, "NSException *")
self.assertEqual(e2.GetSummary(), '"SomeReason"')
self.assertEqual(e2.GetChildMemberWithName("name").description, "ThrownException")
self.assertEqual(e2.GetChildMemberWithName("reason").description, "SomeReason")
userInfo = e2.GetChildMemberWithName("userInfo").dynamic
self.assertEqual(userInfo.summary, "1 key/value pair")
self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(0).description, "some_key")
self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(1).description, "some_value")
reserved = e2.GetChildMemberWithName("reserved").dynamic
self.assertGreater(reserved.num_children, 0)
callStackReturnAddresses = [reserved.GetChildAtIndex(i).GetChildAtIndex(1) for i in range(0, reserved.GetNumChildren())
if reserved.GetChildAtIndex(i).GetChildAtIndex(0).description == "callStackReturnAddresses"][0].dynamic
children = [callStackReturnAddresses.GetChildAtIndex(i) for i in range(0, callStackReturnAddresses.num_children)]
pcs = [i.unsigned for i in children]
names = [target.ResolveSymbolContextForAddress(lldb.SBAddress(pc, target), lldb.eSymbolContextSymbol).GetSymbol().name for pc in pcs]
for n in ["objc_exception_throw", "foo(int)", "main"]:
self.assertTrue(n in names, "%s is in the exception backtrace (%s)" % (n, names))
@skipUnlessDarwin
def test_objc_exceptions_at_abort(self):
self.build()
target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
self.assertTrue(target, VALID_TARGET)
self.runCmd("run 0")
# We should be stopped at pthread_kill because of an unhandled exception
self.expect("thread list",
substrs=['stopped', 'stop reason = signal SIGABRT'])
self.expect('thread exception', substrs=[
'(NSException *) exception = ',
'"SomeReason"',
'libobjc.A.dylib`objc_exception_throw',
'a.out`foo', 'at main.mm:16',
'a.out`rethrow', 'at main.mm:27',
'a.out`main',
])
process = self.dbg.GetSelectedTarget().process
thread = process.GetSelectedThread()
# There is an exception being currently processed at this point
self.assertTrue(thread.GetCurrentException().IsValid())
self.assertTrue(thread.GetCurrentExceptionBacktrace().IsValid())
history_thread = thread.GetCurrentExceptionBacktrace()
self.assertGreaterEqual(history_thread.num_frames, 4)
for n in ["objc_exception_throw", "foo(int)", "rethrow(int)", "main"]:
self.assertEqual(len([f for f in history_thread.frames if f.GetFunctionName() == n]), 1)
self.runCmd("kill")
self.runCmd("run 1")
# We should be stopped at pthread_kill because of an unhandled exception
self.expect("thread list",
substrs=['stopped', 'stop reason = signal SIGABRT'])
self.expect('thread exception', substrs=[
'(MyCustomException *) exception = ',
'libobjc.A.dylib`objc_exception_throw',
'a.out`foo', 'at main.mm:18',
'a.out`rethrow', 'at main.mm:27',
'a.out`main',
])
process = self.dbg.GetSelectedTarget().process
thread = process.GetSelectedThread()
history_thread = thread.GetCurrentExceptionBacktrace()
self.assertGreaterEqual(history_thread.num_frames, 4)
for n in ["objc_exception_throw", "foo(int)", "rethrow(int)", "main"]:
self.assertEqual(len([f for f in history_thread.frames if f.GetFunctionName() == n]), 1)
@skipUnlessDarwin
def test_cxx_exceptions_at_abort(self):
self.build()
target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
self.assertTrue(target, VALID_TARGET)
self.runCmd("run 2")
# We should be stopped at pthread_kill because of an unhandled exception
self.expect("thread list",
substrs=['stopped', 'stop reason = signal SIGABRT'])
self.expect('thread exception', substrs=['exception ='])
process = self.dbg.GetSelectedTarget().process
thread = process.GetSelectedThread()
self.assertTrue(thread.GetCurrentException().IsValid())
# C++ exception backtraces are not exposed in the API (yet).
self.assertFalse(thread.GetCurrentExceptionBacktrace().IsValid())
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