110 lines
4.1 KiB
Python
110 lines
4.1 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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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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self.exe_name = self.testMethodName
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self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
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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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@skipIfDarwin
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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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# 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'.
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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=[
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'Watchpoint created',
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'size = 1',
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'type = w'])
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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 (.*):",
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self.res.GetOutput().splitlines()[0])
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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,
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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",
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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("thread list", STOPPED_DUE_TO_WATCHPOINT,
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substrs=['stopped',
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'stop reason = watchpoint %d' % expected_wp_id])
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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",
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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 1.
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self.expect("watchpoint list -v",
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substrs=['hit_count = 1'])
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self.runCmd("thread backtrace all")
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