1 """ 2 Test lldb target stop-hook mechanism to see whether it fires off correctly . 3 """ 4 5 import os 6 import unittest2 7 import lldb 8 import pexpect 9 from lldbtest import * 10 11 class StopHookMechanismTestCase(TestBase): 12 13 mydir = os.path.join("functionalities", "stop-hook") 14 15 @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") 16 @dsym_test 17 def test_with_dsym(self): 18 """Test the stop-hook mechanism.""" 19 self.buildDsym() 20 self.stop_hook_firing() 21 22 @skipIfLinux # llvm.org/pr15037: stop-hooks sometimes fail to fire on Linux (disabled to avoid needless noise) 23 @dwarf_test 24 def test_with_dwarf(self): 25 """Test the stop-hook mechanism.""" 26 self.buildDwarf() 27 self.stop_hook_firing() 28 29 def setUp(self): 30 # Call super's setUp(). 31 TestBase.setUp(self) 32 # Find the line numbers inside main.cpp. 33 self.begl = line_number('main.cpp', '// Set breakpoint here to test target stop-hook.') 34 self.endl = line_number('main.cpp', '// End of the line range for which stop-hook is to be run.') 35 self.correct_step_line = line_number ('main.cpp', '// We should stop here after stepping.') 36 self.line = line_number('main.cpp', '// Another breakpoint which is outside of the stop-hook range.') 37 38 def stop_hook_firing(self): 39 """Test the stop-hook mechanism.""" 40 exe = os.path.join(os.getcwd(), "a.out") 41 prompt = "(lldb) " 42 add_prompt = "Enter your stop hook command(s). Type 'DONE' to end.\r\n> " 43 add_prompt1 = "\r\n> " 44 45 # So that the child gets torn down after the test. 46 self.child = pexpect.spawn('%s %s %s' % (self.lldbHere, self.lldbOption, exe)) 47 child = self.child 48 # Turn on logging for what the child sends back. 49 if self.TraceOn(): 50 child.logfile_read = sys.stdout 51 52 # Set the breakpoint, followed by the target stop-hook commands. 53 child.expect_exact(prompt) 54 child.sendline('breakpoint set -f main.cpp -l %d' % self.begl) 55 child.expect_exact(prompt) 56 child.sendline('breakpoint set -f main.cpp -l %d' % self.line) 57 child.expect_exact(prompt) 58 child.sendline('target stop-hook add -f main.cpp -l %d -e %d' % (self.begl, self.endl)) 59 child.expect_exact(add_prompt) 60 child.sendline('expr ptr') 61 child.expect_exact(add_prompt1) 62 child.sendline('DONE') 63 child.expect_exact(prompt) 64 child.sendline('target stop-hook list') 65 66 # Now run the program, expect to stop at the the first breakpoint which is within the stop-hook range. 67 child.expect_exact(prompt) 68 child.sendline('run') 69 child.expect_exact(prompt) 70 child.sendline('thread step-over') 71 # Expecting to find the output emitted by the firing of our stop hook. 72 child.expect_exact('(void *) $') 73 # This is orthogonal to the main stop hook test, but this example shows a bug in 74 # CLANG where the line table entry for the "return -1" actually includes some code 75 # from the other branch of the if/else, so we incorrectly stop at the "return -1" line. 76 # I fixed that in lldb and I'm sticking in a test here because I don't want to have to 77 # make up a whole nother test case for it. 78 child.sendline('frame info') 79 child.expect_exact('at main.cpp:%d'%self.correct_step_line) 80 81 # Now continue the inferior, we'll stop at another breakpoint which is outside the stop-hook range. 82 child.sendline('process continue') 83 child.expect_exact('// Another breakpoint which is outside of the stop-hook range.') 84 #self.DebugPExpect(child) 85 child.sendline('thread step-over') 86 child.expect_exact('// Another breakpoint which is outside of the stop-hook range.') 87 #self.DebugPExpect(child) 88 # Verify that the 'Stop Hooks' mechanism is NOT BEING fired off. 89 self.expect(child.before, exe=False, matching=False, 90 substrs = ['(void *) $']) 91 92 93 if __name__ == '__main__': 94 import atexit 95 lldb.SBDebugger.Initialize() 96 atexit.register(lambda: lldb.SBDebugger.Terminate()) 97 unittest2.main() 98
