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
120 lines
4.6 KiB
Python
120 lines
4.6 KiB
Python
"""
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Test lldb watchpoint that uses '-s size' to watch a pointed location with size.
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"""
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import re
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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 HelloWatchLocationTestCase(TestBase):
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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(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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self.exe_name = self.testMethodName
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self.d = {"CXX_SOURCES": self.source, "EXE": self.exe_name}
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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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# Most of the MIPS boards provide only one H/W watchpoints, and S/W
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# watchpoints are not supported yet
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@expectedFailureAll(triple=re.compile("^mips"))
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# SystemZ and PowerPC also currently supports only one H/W watchpoint
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@expectedFailureAll(archs=["powerpc64le", "s390x"])
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@skipIfWindows # This test is flaky on Windows
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def test_hello_watchlocation(self):
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"""Test watching a location with '-s size' option."""
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self.build(dictionary=self.d)
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self.setTearDownCleanup(dictionary=self.d)
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exe = self.getBuildArtifact(self.exe_name)
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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, loc_exact=False
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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'.
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self.expect(
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"watchpoint set expression -w write -s 1 -- g_char_ptr",
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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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# Get a hold of the watchpoint id just created, it is used later on to
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# match the watchpoint id which is expected to be fired.
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match = re.match(
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"Watchpoint created: Watchpoint (.*):", self.res.GetOutput().splitlines()[0]
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)
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if match:
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expected_wp_id = int(match.group(1), 0)
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else:
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self.fail("Grokking watchpoint id faailed!")
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self.runCmd("expr unsigned val = *g_char_ptr; val")
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self.expect(self.res.GetOutput().splitlines()[0], exe=False, endstr=" = 0")
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self.runCmd("watchpoint set expression -w write -s 4 -- &threads[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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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=["stopped", "stop reason = watchpoint %d" % expected_wp_id],
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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.expect("frame info", substrs=[self.violating_func])
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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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