108 lines
3.9 KiB
Python
108 lines
3.9 KiB
Python
"""
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Test lldb watchpoint that uses 'watchpoint set -w write -s size' to watch a pointed location with size.
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"""
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class WatchLocationUsingWatchpointSetTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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NO_DEBUG_INFO_TESTCASE = True
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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.cpp'
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# Find the line number to break inside main().
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self.line = line_number(
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self.source, '// Set break point at this line.')
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# This is for verifying that watch location works.
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self.violating_func = "do_bad_thing_with_location"
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# Build dictionary to have unique executable names for each test
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# method.
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@skipIf(
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oslist=["linux"],
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archs=[
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'aarch64',
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'arm'],
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bugnumber="llvm.org/pr26031")
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def test_watchlocation_using_watchpoint_set(self):
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"""Test watching a location with 'watchpoint set expression -w write -s size' option."""
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self.build()
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self.setTearDownCleanup()
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exe = self.getBuildArtifact("a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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# Add a breakpoint to set a watchpoint when stopped on the breakpoint.
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lldbutil.run_break_set_by_file_and_line(
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self, None, self.line, num_expected_locations=1)
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# Run the program.
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self.runCmd("run", RUN_SUCCEEDED)
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# We should be stopped again due to the breakpoint.
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# The stop reason of the thread should be breakpoint.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs=['stopped',
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'stop reason = breakpoint'])
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# Now let's set a write-type watchpoint pointed to by 'g_char_ptr' and
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# with offset as 7.
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# The main.cpp, by design, misbehaves by not following the agreed upon
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# protocol of only accessing the allowable index range of [0, 6].
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self.expect(
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"watchpoint set expression -w write -s 1 -- g_char_ptr + 7",
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WATCHPOINT_CREATED,
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substrs=[
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'Watchpoint created',
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'size = 1',
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'type = w'])
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self.runCmd("expr unsigned val = g_char_ptr[7]; val")
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self.expect(self.res.GetOutput().splitlines()[0], exe=False,
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endstr=' = 0')
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# Use the '-v' option to do verbose listing of the watchpoint.
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# The hit count should be 0 initially.
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self.expect("watchpoint list -v",
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substrs=['hit_count = 0'])
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self.runCmd("process continue")
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# We should be stopped again due to the watchpoint (write type), but
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# only once. The stop reason of the thread should be watchpoint.
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self.expect(
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"thread list",
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STOPPED_DUE_TO_WATCHPOINT,
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substrs=[
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'stopped',
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self.violating_func,
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'stop reason = watchpoint',
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])
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# Switch to the thread stopped due to watchpoint and issue some
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# commands.
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self.switch_to_thread_with_stop_reason(lldb.eStopReasonWatchpoint)
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self.runCmd("thread backtrace")
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self.runCmd("expr unsigned val = g_char_ptr[7]; val")
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self.expect(self.res.GetOutput().splitlines()[0], exe=False,
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endstr=' = 99')
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# Use the '-v' option to do verbose listing of the watchpoint.
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# The hit count should now be the same as the number of threads that
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# stopped on a watchpoint.
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threads = lldbutil.get_stopped_threads(
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self.process(), lldb.eStopReasonWatchpoint)
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self.expect("watchpoint list -v",
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substrs=['hit_count = %d' % len(threads)])
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self.runCmd("thread backtrace all")
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