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