1"""Test lldb's startup delays creating a target, setting a breakpoint, and run to breakpoint stop."""
2
3from __future__ import print_function
4
5
6import sys
7import lldb
8from lldbsuite.test import configuration
9from lldbsuite.test import lldbtest_config
10from lldbsuite.test.decorators import *
11from lldbsuite.test.lldbbench import *
12
13
14class StartupDelaysBench(BenchBase):
15
16    def setUp(self):
17        BenchBase.setUp(self)
18        # Create self.stopwatch2 for measuring "set first breakpoint".
19        # The default self.stopwatch is for "create fresh target".
20        self.stopwatch2 = Stopwatch()
21        # Create self.stopwatch3 for measuring "run to breakpoint".
22        self.stopwatch3 = Stopwatch()
23        self.exe = lldbtest_config.lldbExec
24        self.break_spec = '-n main'
25        self.count = 30
26
27    @benchmarks_test
28    @no_debug_info_test
29    @expectedFailureAll(
30        oslist=["windows"],
31        bugnumber="llvm.org/pr22274: need a pexpect replacement for windows")
32    def test_startup_delay(self):
33        """Test start up delays creating a target, setting a breakpoint, and run to breakpoint stop."""
34        print()
35        self.run_startup_delays_bench(self.exe, self.break_spec, self.count)
36        print(
37            "lldb startup delay (create fresh target) benchmark:",
38            self.stopwatch)
39        print(
40            "lldb startup delay (set first breakpoint) benchmark:",
41            self.stopwatch2)
42        print(
43            "lldb startup delay (run to breakpoint) benchmark:",
44            self.stopwatch3)
45
46    def run_startup_delays_bench(self, exe, break_spec, count):
47        import pexpect
48        # Set self.child_prompt, which is "(lldb) ".
49        self.child_prompt = '(lldb) '
50        prompt = self.child_prompt
51
52        # Reset the stopwatchs now.
53        self.stopwatch.reset()
54        self.stopwatch2.reset()
55        for i in range(count):
56            # So that the child gets torn down after the test.
57            self.child = pexpect.spawn(
58                '%s %s' %
59                (lldbtest_config.lldbExec, self.lldbOption))
60            child = self.child
61
62            # Turn on logging for what the child sends back.
63            if self.TraceOn():
64                child.logfile_read = sys.stdout
65
66            with self.stopwatch:
67                # Create a fresh target.
68                child.sendline('file %s' % exe)  # Aka 'target create'.
69                child.expect_exact(prompt)
70
71            with self.stopwatch2:
72                # Read debug info and set the first breakpoint.
73                child.sendline('breakpoint set %s' % break_spec)
74                child.expect_exact(prompt)
75
76            with self.stopwatch3:
77                # Run to the breakpoint just set.
78                child.sendline('run')
79                child.expect_exact(prompt)
80
81            child.sendline('quit')
82            try:
83                self.child.expect(pexpect.EOF)
84            except:
85                pass
86
87        # The test is about to end and if we come to here, the child process has
88        # been terminated.  Mark it so.
89        self.child = None
90