| """ |
| 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.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import configuration |
| from lldbsuite.test import lldbutil |
| |
| |
| 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 |
| # stop-hooks sometimes fail to fire on Linux |
| @expectedFlakeyLinux('llvm.org/pr15037') |
| @expectedFailureAll( |
| hostoslist=["windows"], |
| bugnumber="llvm.org/pr22274: need a pexpect replacement for windows") |
| @skipIf(oslist=['ios', 'watchos', 'tvos', 'bridgeos'], archs=['armv7', 'armv7k']) # <rdar://problem/34582291> problem with armv7 and step-over and stop-hook firing on ios etc systems |
| def test(self): |
| """Test the stop-hook mechanism.""" |
| self.build() |
| |
| import pexpect |
| exe = self.getBuildArtifact("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 *) $']) |