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"""
Test that lldb can continue past a __builtin_debugtrap, but not a __builtin_trap
"""
import lldb
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
class BuiltinDebugTrapTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
# Currently this depends on behavior in debugserver to
# advance the pc past __builtin_trap instructions so that
# continue works. Everyone is in agreement that this
# should be moved up into lldb instead of depending on the
# remote stub rewriting the pc values.
@skipUnlessDarwin
def test(self):
self.build()
(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
self, "// Set a breakpoint here", lldb.SBFileSpec("main.cpp")
)
# Continue to __builtin_debugtrap()
process.Continue()
if self.TraceOn():
self.runCmd("f")
self.runCmd("bt")
self.runCmd("ta v global")
self.assertEqual(
process.GetSelectedThread().GetStopReason(), lldb.eStopReasonException
)
list = target.FindGlobalVariables("global", 1, lldb.eMatchTypeNormal)
self.assertEqual(list.GetSize(), 1)
global_value = list.GetValueAtIndex(0)
self.assertEqual(global_value.GetValueAsUnsigned(), 5)
# Continue to the __builtin_trap() -- we should be able to
# continue past __builtin_debugtrap.
process.Continue()
if self.TraceOn():
self.runCmd("f")
self.runCmd("bt")
self.runCmd("ta v global")
self.assertEqual(
process.GetSelectedThread().GetStopReason(), lldb.eStopReasonException
)
# "global" is now 10.
self.assertEqual(global_value.GetValueAsUnsigned(), 10)
# We should be at the same point as before -- cannot advance
# past a __builtin_trap().
process.Continue()
if self.TraceOn():
self.runCmd("f")
self.runCmd("bt")
self.runCmd("ta v global")
self.assertEqual(
process.GetSelectedThread().GetStopReason(), lldb.eStopReasonException
)
# "global" is still 10.
self.assertEqual(global_value.GetValueAsUnsigned(), 10)
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