e60bc53b46
This adds new APIs and a command to deal with exceptions (mostly Obj-C exceptions): SBThread and Thread get GetCurrentException API, which returns an SBValue/ValueObjectSP with the current exception for a thread. "Current" means an exception that is currently being thrown, caught or otherwise processed. In this patch, we only know about the exception when in objc_exception_throw, but subsequent patches will expand this (and add GetCurrentExceptionBacktrace, which will return an SBThread/ThreadSP containing a historical thread backtrace retrieved from the exception object. Currently unimplemented, subsequent patches will implement this). Extracting the exception from objc_exception_throw is implemented by adding a frame recognizer. This also add a new sub-command "thread exception", which prints the current exception. Differential Revision: https://reviews.llvm.org/D43886 llvm-svn: 347813
111 lines
4.6 KiB
Python
111 lines
4.6 KiB
Python
# encoding: utf-8
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"""
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Test lldb Obj-C exception support.
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"""
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from __future__ import print_function
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class ObjCExceptionsTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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@skipUnlessDarwin
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def test_objc_exceptions_1(self):
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self.build()
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target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
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self.assertTrue(target, VALID_TARGET)
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lldbutil.run_to_name_breakpoint(self, "objc_exception_throw")
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs=['stopped', 'stop reason = breakpoint'])
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self.expect('thread exception', substrs=[
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'(NSException *) exception = ',
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'name: "ThrownException" - reason: "SomeReason"',
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])
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lldbutil.run_to_source_breakpoint(self, "// Set break point at this line.", lldb.SBFileSpec("main.m"))
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs=['stopped', 'stop reason = breakpoint'])
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target = self.dbg.GetSelectedTarget()
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thread = target.GetProcess().GetSelectedThread()
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frame = thread.GetSelectedFrame()
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self.expect(
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'frame variable e1',
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substrs=[
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'(NSException *) e1 = ',
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'name: @"ExceptionName" - reason: @"SomeReason"'
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])
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self.expect(
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'frame variable --dynamic-type no-run-target *e1',
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substrs=[
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'(NSException) *e1 = ',
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'name = ', '@"ExceptionName"',
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'reason = ', '@"SomeReason"',
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'userInfo = ', '1 key/value pair',
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'reserved = ', 'nil',
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])
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e1 = frame.FindVariable("e1")
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self.assertTrue(e1)
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self.assertEqual(e1.type.name, "NSException *")
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self.assertEqual(e1.GetSummary(), 'name: @"ExceptionName" - reason: @"SomeReason"')
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self.assertEqual(e1.GetChildMemberWithName("name").description, "ExceptionName")
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self.assertEqual(e1.GetChildMemberWithName("reason").description, "SomeReason")
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userInfo = e1.GetChildMemberWithName("userInfo").dynamic
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self.assertEqual(userInfo.summary, "1 key/value pair")
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self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(0).description, "some_key")
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self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(1).description, "some_value")
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self.assertEqual(e1.GetChildMemberWithName("reserved").description, "<nil>")
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self.expect(
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'frame variable e2',
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substrs=[
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'(NSException *) e2 = ',
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'name: @"ThrownException" - reason: @"SomeReason"'
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])
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self.expect(
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'frame variable --dynamic-type no-run-target *e2',
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substrs=[
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'(NSException) *e2 = ',
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'name = ', '@"ThrownException"',
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'reason = ', '@"SomeReason"',
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'userInfo = ', '1 key/value pair',
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'reserved = ',
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])
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e2 = frame.FindVariable("e2")
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self.assertTrue(e2)
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self.assertEqual(e2.type.name, "NSException *")
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self.assertEqual(e2.GetSummary(), 'name: @"ThrownException" - reason: @"SomeReason"')
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self.assertEqual(e2.GetChildMemberWithName("name").description, "ThrownException")
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self.assertEqual(e2.GetChildMemberWithName("reason").description, "SomeReason")
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userInfo = e2.GetChildMemberWithName("userInfo").dynamic
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self.assertEqual(userInfo.summary, "1 key/value pair")
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self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(0).description, "some_key")
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self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(1).description, "some_value")
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reserved = e2.GetChildMemberWithName("reserved").dynamic
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self.assertGreater(reserved.num_children, 0)
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callStackReturnAddresses = [reserved.GetChildAtIndex(i).GetChildAtIndex(1) for i in range(0, reserved.GetNumChildren())
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if reserved.GetChildAtIndex(i).GetChildAtIndex(0).description == "callStackReturnAddresses"][0].dynamic
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children = [callStackReturnAddresses.GetChildAtIndex(i) for i in range(0, callStackReturnAddresses.num_children)]
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pcs = [i.unsigned for i in children]
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names = [target.ResolveSymbolContextForAddress(lldb.SBAddress(pc, target), lldb.eSymbolContextSymbol).GetSymbol().name for pc in pcs]
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for n in ["objc_exception_throw", "foo", "main"]:
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self.assertTrue(n in names, "%s is in the exception backtrace (%s)" % (n, names))
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