forked from OSchip/llvm-project
103 lines
4.2 KiB
Python
103 lines
4.2 KiB
Python
"""
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Test that lldb watchpoint works for multiple threads.
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"""
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import os, time
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import unittest2
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import lldb
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from lldbtest import *
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class WatchpointForMultipleThreadsTestCase(TestBase):
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mydir = os.path.join("functionalities", "watchpoint", "multiple_threads")
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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def test_watchpoint_multiple_threads_with_dsym(self):
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"""Test that lldb watchpoint works for multiple threads."""
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self.buildDsym(dictionary=self.d)
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self.setTearDownCleanup(dictionary=self.d)
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self.hello_multiple_threads()
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def test_watchpoint_multiple_threads_with_dwarf(self):
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"""Test that lldb watchpoint works for multiple threads."""
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self.buildDwarf(dictionary=self.d)
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self.setTearDownCleanup(dictionary=self.d)
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self.hello_multiple_threads()
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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.first_stop = line_number(self.source, '// Set break point at this line')
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self.thread_function = line_number(self.source, '// Break here in order to allow the thread')
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# Build dictionary to have unique executable names for each test 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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def hello_multiple_threads(self):
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"""Test that lldb watchpoint works for multiple threads."""
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exe = os.path.join(os.getcwd(), 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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self.expect("breakpoint set -l %d" % self.first_stop, BREAKPOINT_CREATED,
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startstr = "Breakpoint created: 1: file ='%s', line = %d, locations = 1" %
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(self.source, self.first_stop))
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# Set this breakpoint to allow newly created thread to inherit the global watchpoint state.
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self.expect("breakpoint set -l %d" % self.thread_function, BREAKPOINT_CREATED,
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startstr = "Breakpoint created: 2: file ='%s', line = %d, locations = 1" %
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(self.source, self.thread_function))
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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 for variable 'g_val'.
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# The main.cpp, by design, misbehaves by not following the agreed upon
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# protocol of using a mutex while accessing the global pool and by not
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# writing to the variable.
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self.expect("frame variable -w write -g g_val", WATCHPOINT_CREATED,
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substrs = ['Watchpoint created', 'size = 4', 'type = w'])
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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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breakpoint_stops = 0
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while True:
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self.runCmd("process continue")
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self.runCmd("thread list")
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if "stop reason = breakpoint" in self.res.GetOutput():
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breakpoint_stops += 1
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if breakpoint_stops > 3:
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self.fail("Do not expect to break more than 3 times")
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continue
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elif "stop reason = watchpoint" in self.res.GetOutput():
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# Good, we verified that the watchpoint works!
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self.runCmd("thread backtrace all")
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break
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else:
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self.fail("The stop reason should be either break or watchpoint")
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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 1.
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self.expect("watchpoint list -v",
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substrs = ['hit_count = 1'])
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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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