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"""
Use lldb Python SBWatchpoint API to set the ignore count.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class WatchpointIgnoreCountTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Our simple source filename.
self.source = "main.c"
# Find the line number to break inside main().
self.line = line_number(self.source, "// Set break point at this line.")
# on arm64 targets, lldb has incorrect hit-count / ignore-counts
# for watchpoints when they are hit with multiple threads at
# the same time. Tracked as llvm.org/pr49433
# or rdar://93863107 inside Apple.
def affected_by_radar_93863107(self):
return (
self.getArchitecture() in ["arm64", "arm64e"]
) and self.platformIsDarwin()
# Read-write watchpoints not supported on SystemZ
@expectedFailureAll(archs=["s390x"])
def test_set_watch_ignore_count(self):
"""Test SBWatchpoint.SetIgnoreCount() API."""
self.build()
exe = self.getBuildArtifact("a.out")
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Create a breakpoint on main.c in order to set our watchpoint later.
breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
self.assertTrue(
breakpoint and breakpoint.GetNumLocations() == 1, VALID_BREAKPOINT
)
# Now launch the process, and do not stop at the entry point.
process = target.LaunchSimple(None, None, self.get_process_working_directory())
# We should be stopped due to the breakpoint. Get frame #0.
process = target.GetProcess()
self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
frame0 = thread.GetFrameAtIndex(0)
# Watch 'global' for read and write.
value = frame0.FindValue("global", lldb.eValueTypeVariableGlobal)
error = lldb.SBError()
watchpoint = value.Watch(True, True, True, error)
self.assertTrue(
value and watchpoint, "Successfully found the variable and set a watchpoint"
)
self.DebugSBValue(value)
# Hide stdout if not running with '-t' option.
if not self.TraceOn():
self.HideStdout()
# There should be only 1 watchpoint location under the target.
self.assertEqual(target.GetNumWatchpoints(), 1)
watchpoint = target.GetWatchpointAtIndex(0)
self.assertTrue(watchpoint.IsEnabled())
self.assertEqual(watchpoint.GetIgnoreCount(), 0)
watch_id = watchpoint.GetID()
self.assertNotEqual(watch_id, 0)
print(watchpoint)
# Now immediately set the ignore count to 2. When we continue, expect the
# inferior to run to its completion without stopping due to watchpoint.
watchpoint.SetIgnoreCount(2)
print(watchpoint)
process.Continue()
# At this point, the inferior process should have exited.
self.assertState(process.GetState(), lldb.eStateExited, PROCESS_EXITED)
# Verify some vital statistics.
self.assertTrue(watchpoint)
self.assertEqual(watchpoint.GetWatchSize(), 4)
if not self.affected_by_radar_93863107():
self.assertEqual(watchpoint.GetHitCount(), 2)
print(watchpoint)
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