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"""
Test that lldb watchpoint works for multiple threads.
"""
from __future__ import print_function
import re
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class WatchpointForMultipleThreadsTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
NO_DEBUG_INFO_TESTCASE = True
main_spec = lldb.SBFileSpec("main.cpp", False)
def test_watchpoint_before_thread_start(self):
"""Test that we can hit a watchpoint we set before starting another thread"""
self.do_watchpoint_test("Before running the thread")
def test_watchpoint_after_thread_start(self):
"""Test that we can hit a watchpoint we set after starting another thread"""
self.do_watchpoint_test("After running the thread")
def do_watchpoint_test(self, line):
self.build()
lldbutil.run_to_source_breakpoint(self, line, self.main_spec)
# Now let's set a write-type watchpoint for variable 'g_val'.
self.expect(
"watchpoint set variable -w write g_val",
WATCHPOINT_CREATED,
substrs=[
'Watchpoint created',
'size = 4',
'type = w'])
# Use the '-v' option to do verbose listing of the watchpoint.
# The hit count should be 0 initially.
self.expect("watchpoint list -v",
substrs=['hit_count = 0'])
self.runCmd("process continue")
self.runCmd("thread list")
if "stop reason = watchpoint" in self.res.GetOutput():
# Good, we verified that the watchpoint works!
self.runCmd("thread backtrace all")
else:
self.fail("The stop reason should be either break or watchpoint")
# Use the '-v' option to do verbose listing of the watchpoint.
# The hit count should now be 1.
self.expect("watchpoint list -v",
substrs=['hit_count = 1'])
def test_watchpoint_multiple_threads_wp_set_and_then_delete(self):
"""Test that lldb watchpoint works for multiple threads, and after the watchpoint is deleted, the watchpoint event should no longer fires."""
self.build()
self.setTearDownCleanup()
lldbutil.run_to_source_breakpoint(self, "After running the thread", self.main_spec)
# Now let's set a write-type watchpoint for variable 'g_val'.
self.expect(
"watchpoint set variable -w write g_val",
WATCHPOINT_CREATED,
substrs=[
'Watchpoint created',
'size = 4',
'type = w'])
# Use the '-v' option to do verbose listing of the watchpoint.
# The hit count should be 0 initially.
self.expect("watchpoint list -v",
substrs=['hit_count = 0'])
watchpoint_stops = 0
while True:
self.runCmd("process continue")
self.runCmd("process status")
if re.search("Process .* exited", self.res.GetOutput()):
# Great, we are done with this test!
break
self.runCmd("thread list")
if "stop reason = watchpoint" in self.res.GetOutput():
self.runCmd("thread backtrace all")
watchpoint_stops += 1
if watchpoint_stops > 1:
self.fail(
"Watchpoint hits not supposed to exceed 1 by design!")
# Good, we verified that the watchpoint works! Now delete the
# watchpoint.
if self.TraceOn():
print(
"watchpoint_stops=%d at the moment we delete the watchpoint" %
watchpoint_stops)
self.runCmd("watchpoint delete 1")
self.expect("watchpoint list -v",
substrs=['No watchpoints currently set.'])
continue
else:
self.fail("The stop reason should be either break or watchpoint")
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