101 lines
4.4 KiB
Python
101 lines
4.4 KiB
Python
"""
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Test lldb target stop-hook mechanism to see whether it fires off correctly .
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"""
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from __future__ import print_function
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import os
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import lldb
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from lldbsuite.test.lldbtest import *
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class StopHookMechanismTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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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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# Find the line numbers inside main.cpp.
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self.begl = line_number('main.cpp', '// Set breakpoint here to test target stop-hook.')
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self.endl = line_number('main.cpp', '// End of the line range for which stop-hook is to be run.')
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self.correct_step_line = line_number ('main.cpp', '// We should stop here after stepping.')
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self.line = line_number('main.cpp', '// Another breakpoint which is outside of the stop-hook range.')
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@skipIfFreeBSD # llvm.org/pr15037
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@expectedFlakeyLinux('llvm.org/pr15037') # stop-hooks sometimes fail to fire on Linux
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@expectedFailureHostWindows("llvm.org/pr22274: need a pexpect replacement for windows")
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def test(self):
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"""Test the stop-hook mechanism."""
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self.build()
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import pexpect
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exe = os.path.join(os.getcwd(), "a.out")
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prompt = "(lldb) "
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add_prompt = "Enter your stop hook command(s). Type 'DONE' to end."
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add_prompt1 = "> "
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# So that the child gets torn down after the test.
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self.child = pexpect.spawn('%s %s' % (lldbtest_config.lldbExec, self.lldbOption))
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child = self.child
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# Turn on logging for what the child sends back.
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if self.TraceOn():
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child.logfile_read = sys.stdout
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if lldb.remote_platform:
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child.expect_exact(prompt)
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child.sendline('platform select %s' % lldb.remote_platform.GetName())
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child.expect_exact(prompt)
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child.sendline('platform connect %s' % lldb.platform_url)
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child.expect_exact(prompt)
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child.sendline('platform settings -w %s' % lldb.remote_platform_working_dir)
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child.expect_exact(prompt)
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child.sendline('target create %s' % exe)
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# Set the breakpoint, followed by the target stop-hook commands.
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child.expect_exact(prompt)
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child.sendline('breakpoint set -f main.cpp -l %d' % self.begl)
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child.expect_exact(prompt)
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child.sendline('breakpoint set -f main.cpp -l %d' % self.line)
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child.expect_exact(prompt)
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child.sendline('target stop-hook add -f main.cpp -l %d -e %d' % (self.begl, self.endl))
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child.expect_exact(add_prompt)
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child.expect_exact(add_prompt1)
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child.sendline('expr ptr')
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child.expect_exact(add_prompt1)
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child.sendline('DONE')
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child.expect_exact(prompt)
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child.sendline('target stop-hook list')
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# Now run the program, expect to stop at the first breakpoint which is within the stop-hook range.
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child.expect_exact(prompt)
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child.sendline('run')
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# Make sure we see the stop hook text from the stop of the process from the run hitting the first breakpoint
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child.expect_exact('(void *) $')
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child.expect_exact(prompt)
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child.sendline('thread step-over')
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# Expecting to find the output emitted by the firing of our stop hook.
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child.expect_exact('(void *) $')
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# This is orthogonal to the main stop hook test, but this example shows a bug in
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# CLANG where the line table entry for the "return -1" actually includes some code
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# from the other branch of the if/else, so we incorrectly stop at the "return -1" line.
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# I fixed that in lldb and I'm sticking in a test here because I don't want to have to
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# make up a whole nother test case for it.
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child.sendline('frame info')
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at_line = 'at main.cpp:%d' % (self.correct_step_line)
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print('expecting "%s"' % at_line)
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child.expect_exact(at_line)
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# Now continue the inferior, we'll stop at another breakpoint which is outside the stop-hook range.
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child.sendline('process continue')
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child.expect_exact('// Another breakpoint which is outside of the stop-hook range.')
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#self.DebugPExpect(child)
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child.sendline('thread step-over')
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child.expect_exact('// Another breakpoint which is outside of the stop-hook range.')
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#self.DebugPExpect(child)
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# Verify that the 'Stop Hooks' mechanism is NOT BEING fired off.
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self.expect(child.before, exe=False, matching=False,
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substrs = ['(void *) $'])
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