6027c94d2f
set a watchpoint Pythonically. If the find-and-watch-a-variable operation
fails, an invalid SBValue is returned, instead.
Example Python usage:
value = frame0.WatchValue('global',
lldb.eValueTypeVariableGlobal,
lldb.LLDB_WATCH_TYPE_READ|lldb.LLDB_WATCH_TYPE_WRITE)
Add TestSetWatchpoint.py to exercise this API.
We have 400 test cases now.
llvm-svn: 140436
98 lines
3.5 KiB
Python
98 lines
3.5 KiB
Python
"""
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Use lldb Python SBFrame API to create a watchpoint for read_write of 'globl' var
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"""
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import os, time
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import re
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import unittest2
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import lldb, lldbutil
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from lldbtest import *
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class SetWatchpointAPITestCase(TestBase):
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mydir = os.path.join("python_api", "watchpoint")
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Our simple source filename.
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self.source = 'main.c'
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# Find the line number to break inside main().
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self.line = line_number(self.source, '// Set break point at this line.')
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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def test_watch_val_with_dsym(self):
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"""Exercise SBFrame.WatchValue() API to set a watchpoint."""
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self.buildDsym()
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self.do_set_watchpoint()
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@python_api_test
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def test_watch_val_with_dwarf(self):
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"""Exercise SBFrame.WatchValue() API to set a watchpoint."""
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self.buildDwarf()
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self.do_set_watchpoint()
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def do_set_watchpoint(self):
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"""Use SBFrame.WatchValue() to set a watchpoint and verify that the program stops later due to the watchpoint."""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Now create a breakpoint on main.c.
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breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
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self.assertTrue(breakpoint and
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breakpoint.GetNumLocations() == 1,
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VALID_BREAKPOINT)
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# Now launch the process, and do not stop at the entry point.
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process = target.LaunchSimple(None, None, os.getcwd())
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# We should be stopped due to the breakpoint. Get frame #0.
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process = target.GetProcess()
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self.assertTrue(process.GetState() == lldb.eStateStopped,
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PROCESS_STOPPED)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
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frame0 = thread.GetFrameAtIndex(0)
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value = frame0.WatchValue('global',
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lldb.eValueTypeVariableGlobal,
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lldb.LLDB_WATCH_TYPE_READ|lldb.LLDB_WATCH_TYPE_WRITE)
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self.assertTrue(value, "Successfully found the variable and set a watchpoint")
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self.DebugSBValue(value)
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# Continue. Expect the program to stop due to the variable being written to.
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process.Continue()
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if (self.TraceOn()):
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lldbutil.print_stacktraces(process)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonWatchpoint)
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self.assertTrue(thread, "The thread stopped due to watchpoint")
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self.DebugSBValue(value)
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# Continue. Expect the program to stop due to the variable being read from.
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process.Continue()
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if (self.TraceOn()):
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lldbutil.print_stacktraces(process)
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonWatchpoint)
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self.assertTrue(thread, "The thread stopped due to watchpoint")
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self.DebugSBValue(value)
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# Continue the process. We don't expect the program to be stopped again.
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process.Continue()
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# At this point, the inferior process should have exited.
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self.assertTrue(process.GetState() == lldb.eStateExited, PROCESS_EXITED)
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if __name__ == '__main__':
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import atexit
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lldb.SBDebugger.Initialize()
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atexit.register(lambda: lldb.SBDebugger.Terminate())
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unittest2.main()
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