2238dcc393
This is an ongoing series of commits that are reformatting our Python code. Reformatting is done with `black` (23.1.0). If you end up having problems merging this commit because you have made changes to a python file, the best way to handle that is to run `git checkout --ours <yourfile>` and then reformat it with black. RFC: https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style Differential revision: https://reviews.llvm.org/D151460
116 lines
4.4 KiB
Python
116 lines
4.4 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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NO_DEBUG_INFO_TESTCASE = True
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# on arm64 targets, lldb has incorrect hit-count / ignore-counts
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# for watchpoints when they are hit with multiple threads at
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# the same time. Tracked as llvm.org/pr49433
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# or rdar://93863107 inside Apple.
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def affected_by_radar_93863107(self):
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return (
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self.getArchitecture() in ["arm64", "arm64e"]
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) and self.platformIsDarwin()
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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(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(oslist=["linux"], archs=["aarch64", "arm"], bugnumber="llvm.org/pr26031")
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@skipIfWindows # This test is flaky on Windows
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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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target = self.dbg.CreateTarget(exe)
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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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)
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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(
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"thread list",
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STOPPED_DUE_TO_BREAKPOINT,
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substrs=["stopped", "stop reason = breakpoint"],
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)
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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=["Watchpoint created", "size = 1", "type = w"],
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)
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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, 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", substrs=["hit_count = 0"])
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# Check the underlying SBWatchpoint.
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watchpoint = target.GetWatchpointAtIndex(0)
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self.assertEqual(watchpoint.GetWatchSize(), 1)
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self.assertEqual(watchpoint.GetHitCount(), 0)
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self.assertEqual(watchpoint.GetWatchSpec(), "g_char_ptr + 7")
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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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)
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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, 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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)
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if not self.affected_by_radar_93863107():
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self.expect("watchpoint list -v", substrs=["hit_count = %d" % len(threads)])
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self.runCmd("thread backtrace all")
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