TestSetWatchpoint.py [plain text]
"""
Use lldb Python SBValue API to create a watchpoint for read_write of 'globl' var.
"""
import os, time
import re
import unittest2
import lldb, lldbutil
from lldbtest import *
class SetWatchpointAPITestCase(TestBase):
mydir = os.path.join("python_api", "watchpoint")
def setUp(self):
TestBase.setUp(self)
self.source = 'main.c'
self.line = line_number(self.source, '// Set break point at this line.')
@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
@python_api_test
@dsym_test
def test_watch_val_with_dsym(self):
"""Exercise SBValue.Watch() API to set a watchpoint."""
self.buildDsym()
self.do_set_watchpoint()
@expectedFailureLinux @python_api_test
@dwarf_test
def test_watch_val_with_dwarf(self):
"""Exercise SBValue.Watch() API to set a watchpoint."""
self.buildDwarf()
self.do_set_watchpoint()
def do_set_watchpoint(self):
"""Use SBFrame.WatchValue() to set a watchpoint and verify that the program stops later due to the watchpoint."""
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
self.assertTrue(breakpoint and
breakpoint.GetNumLocations() == 1,
VALID_BREAKPOINT)
process = target.LaunchSimple(None, None, os.getcwd())
process = target.GetProcess()
self.assertTrue(process.GetState() == lldb.eStateStopped,
PROCESS_STOPPED)
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
frame0 = thread.GetFrameAtIndex(0)
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)
if not self.TraceOn():
self.HideStdout()
print watchpoint
process.Continue()
if (self.TraceOn()):
lldbutil.print_stacktraces(process)
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonWatchpoint)
self.assertTrue(thread, "The thread stopped due to watchpoint")
self.DebugSBValue(value)
process.Continue()
if (self.TraceOn()):
lldbutil.print_stacktraces(process)
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonWatchpoint)
self.assertTrue(thread, "The thread stopped due to watchpoint")
self.DebugSBValue(value)
process.Continue()
self.assertTrue(process.GetState() == lldb.eStateExited, PROCESS_EXITED)
if __name__ == '__main__':
import atexit
lldb.SBDebugger.Initialize()
atexit.register(lambda: lldb.SBDebugger.Terminate())
unittest2.main()