1"""
2Test that lldb can continue past a __builtin_debugtrap, but not a __builtin_trap
3"""
4
5import lldb
6import lldbsuite.test.lldbutil as lldbutil
7from lldbsuite.test.decorators import *
8from lldbsuite.test.lldbtest import *
9
10class BuiltinDebugTrapTestCase(TestBase):
11
12    NO_DEBUG_INFO_TESTCASE = True
13
14    # Currently this depends on behavior in debugserver to
15    # advance the pc past __builtin_trap instructions so that
16    # continue works.  Everyone is in agreement that this
17    # should be moved up into lldb instead of depending on the
18    # remote stub rewriting the pc values.
19    @skipUnlessDarwin
20
21    def test(self):
22        self.build()
23        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
24            self, "// Set a breakpoint here", lldb.SBFileSpec("main.cpp"))
25
26        # Continue to __builtin_debugtrap()
27        process.Continue()
28        if self.TraceOn():
29            self.runCmd("f")
30            self.runCmd("bt")
31            self.runCmd("ta v global")
32
33        self.assertEqual(process.GetSelectedThread().GetStopReason(),
34                         lldb.eStopReasonException)
35
36        list = target.FindGlobalVariables("global", 1, lldb.eMatchTypeNormal)
37        self.assertEqual(list.GetSize(), 1)
38        global_value = list.GetValueAtIndex(0)
39
40        self.assertEqual(global_value.GetValueAsUnsigned(), 5)
41
42        # Continue to the __builtin_trap() -- we should be able to
43        # continue past __builtin_debugtrap.
44        process.Continue()
45        if self.TraceOn():
46            self.runCmd("f")
47            self.runCmd("bt")
48            self.runCmd("ta v global")
49
50        self.assertEqual(process.GetSelectedThread().GetStopReason(),
51                         lldb.eStopReasonException)
52
53        # "global" is now 10.
54        self.assertEqual(global_value.GetValueAsUnsigned(), 10)
55
56        # We should be at the same point as before -- cannot advance
57        # past a __builtin_trap().
58        process.Continue()
59        if self.TraceOn():
60            self.runCmd("f")
61            self.runCmd("bt")
62            self.runCmd("ta v global")
63
64        self.assertEqual(process.GetSelectedThread().GetStopReason(),
65                         lldb.eStopReasonException)
66
67        # "global" is still 10.
68        self.assertEqual(global_value.GetValueAsUnsigned(), 10)
69