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"""Test stepping over 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."""
self.build()
target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(
self, bkpt_text, 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)
return (target, process, thread, frame, read_watchpoint)
# Read-write watchpoints not supported on SystemZ
@expectedFailureAll(archs=["s390x"])
@add_test_categories(["basic_process"])
def test_step_over(self):
target, process, thread, frame, wp = self.get_to_start("Set a breakpoint here")
thread.StepOver()
self.assertStopReason(
thread.GetStopReason(),
lldb.eStopReasonWatchpoint,
STOPPED_DUE_TO_WATCHPOINT,
)
self.assertEqual(thread.GetStopDescription(20), "watchpoint 1")
# Skip everywhere while modify watchpoints are sorted out.
@skipTestIfFn(lambda : True)
@expectedFailureAll(
oslist=["freebsd", "linux"],
archs=["aarch64", "arm"],
bugnumber="llvm.org/pr26031",
)
@expectedFailureAll(oslist=["linux"], bugnumber="bugs.swift.org/SR-796")
# Read-write watchpoints not supported on SystemZ
@expectedFailureAll(archs=["s390x"])
@expectedFailureAll(
oslist=["ios", "watchos", "tvos", "bridgeos", "macosx"],
archs=["aarch64", "arm"],
bugnumber="<rdar://problem/34027183>",
)
@add_test_categories(["basic_process"])
def test_step_instruction(self):
target, process, thread, frame, wp = self.get_to_start(
"Set breakpoint after call"
)
self.step_inst_for_watchpoint(1)
write_value = frame.FindValue("g_watch_me_write", lldb.eValueTypeVariableGlobal)
self.assertTrue(write_value, "Failed to find write value.")
# Most of the MIPS boards provide only one H/W watchpoints, and S/W
# watchpoints are not supported yet
arch = self.getArchitecture()
if re.match("^mips", arch) or re.match("powerpc64le", arch):
self.runCmd("watchpoint delete 1")
error = lldb.SBError()
# resolve_location=True, read=False, write=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.assertEqual(thread.GetStopDescription(20), "watchpoint 2")
process.Continue()
self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
self.assertEqual(thread.GetStopDescription(20), "step over")
self.step_inst_for_watchpoint(2)
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.assertEqual(
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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