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"""Test stepping over watchpoints and instruction stepping past watchpoints."""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class TestStepOverWatchpoint(TestBase):
NO_DEBUG_INFO_TESTCASE = True
def get_to_start(self, bkpt_text):
"""Test stepping over watchpoints and instruction stepping past watchpoints.."""
self.build()
target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(
self, bkpt_text, lldb.SBFileSpec("main.c")
)
return (target, process, thread, frame, read_watchpoint)
@add_test_categories(["basic_process"])
@expectedFailureAll(
oslist=["ios", "watchos", "tvos", "bridgeos", "macosx"],
archs=["aarch64", "arm"],
bugnumber="<rdar://problem/106868647>",
)
def test_step_over_read_watchpoint(self):
self.build()
target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(
self, "break here for read watchpoints", lldb.SBFileSpec("main.c")
)
frame = thread.GetFrameAtIndex(0)
self.assertTrue(frame.IsValid(), "Failed to get frame.")
read_value = frame.FindValue("g_watch_me_read", lldb.eValueTypeVariableGlobal)
self.assertTrue(read_value.IsValid(), "Failed to find read value.")
error = lldb.SBError()
# resolve_location=True, read=True, write=False
read_watchpoint = read_value.Watch(True, True, False, error)
self.assertSuccess(error, "Error while setting watchpoint")
self.assertTrue(read_watchpoint, "Failed to set read watchpoint.")
# Disable the breakpoint we hit so we don't muddy the waters with
# stepping off from the breakpoint:
bkpt.SetEnabled(False)
thread.StepOver()
self.assertStopReason(
thread.GetStopReason(),
lldb.eStopReasonWatchpoint,
STOPPED_DUE_TO_WATCHPOINT,
)
self.assertEquals(thread.GetStopDescription(20), "watchpoint 1")
process.Continue()
self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
self.assertEquals(thread.GetStopDescription(20), "step over")
self.step_inst_for_watchpoint(1)
@add_test_categories(["basic_process"])
@expectedFailureAll(
oslist=["ios", "watchos", "tvos", "bridgeos", "macosx"],
archs=["aarch64", "arm"],
bugnumber="<rdar://problem/106868647>",
)
def test_step_over_write_watchpoint(self):
self.build()
target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(
self, "break here for modify watchpoints", lldb.SBFileSpec("main.c")
)
# Disable the breakpoint we hit so we don't muddy the waters with
# stepping off from the breakpoint:
bkpt.SetEnabled(False)
frame = thread.GetFrameAtIndex(0)
self.assertTrue(frame.IsValid(), "Failed to get frame.")
write_value = frame.FindValue("g_watch_me_write", lldb.eValueTypeVariableGlobal)
self.assertTrue(write_value, "Failed to find write value.")
error = lldb.SBError()
# resolve_location=True, read=False, modify=True
write_watchpoint = write_value.Watch(True, False, True, error)
self.assertTrue(write_watchpoint, "Failed to set write watchpoint.")
self.assertSuccess(error, "Error while setting watchpoint")
thread.StepOver()
self.assertStopReason(
thread.GetStopReason(),
lldb.eStopReasonWatchpoint,
STOPPED_DUE_TO_WATCHPOINT,
)
self.assertEquals(thread.GetStopDescription(20), "watchpoint 1")
process.Continue()
self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
self.assertEquals(thread.GetStopDescription(20), "step over")
self.step_inst_for_watchpoint(1)
def step_inst_for_watchpoint(self, wp_id):
watchpoint_hit = False
current_line = self.frame().GetLineEntry().GetLine()
while self.frame().GetLineEntry().GetLine() == current_line:
self.thread().StepInstruction(False) # step_over=False
stop_reason = self.thread().GetStopReason()
if stop_reason == lldb.eStopReasonWatchpoint:
self.assertFalse(watchpoint_hit, "Watchpoint already hit.")
expected_stop_desc = "watchpoint %d" % wp_id
actual_stop_desc = self.thread().GetStopDescription(20)
self.assertEquals(
actual_stop_desc, expected_stop_desc, "Watchpoint ID didn't match."
)
watchpoint_hit = True
else:
self.assertStopReason(
stop_reason, lldb.eStopReasonPlanComplete, STOPPED_DUE_TO_STEP_IN
)
self.assertTrue(watchpoint_hit, "Watchpoint never hit.")
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