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"""
Ensure that when the interrupt is raised we still make frame 0.
and make sure "GetNumFrames" isn't interrupted.
"""
import lldb
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.lldbtest import *
from lldbsuite.test.decorators import *
class TestInterruptingBacktrace(TestBase):
NO_DEBUG_INFO_TESTCASE = True
@skipIf(oslist=["linux"], archs=["arm"])
def test_backtrace_interrupt(self):
"""Use RequestInterrupt followed by stack operations
to ensure correct interrupt behavior for stacks."""
self.build()
self.main_source_file = lldb.SBFileSpec("main.c")
self.bt_interrupt_test()
def bt_interrupt_test(self):
(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
self, "Set a breakpoint here", self.main_source_file
)
# Now continue, and when we stop we will have crashed.
process.Continue()
self.dbg.RequestInterrupt()
# Be sure to turn this off again:
def cleanup():
if self.dbg.InterruptRequested():
self.dbg.CancelInterruptRequest()
self.addTearDownHook(cleanup)
frame_0 = thread.GetFrameAtIndex(0)
self.assertTrue(frame_0.IsValid(), "Got a good 0th frame")
# The interrupt flag is up already, so any attempt to backtrace
# should be cut short:
frame_1 = thread.GetFrameAtIndex(1)
self.assertFalse(frame_1.IsValid(), "Prevented from getting more frames")
# Since GetNumFrames is a contract, we don't interrupt it:
num_frames = thread.GetNumFrames()
print(f"Number of frames: {num_frames}")
self.assertGreater(num_frames, 1, "Got many frames")
self.dbg.CancelInterruptRequest()
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