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"""Benchmark the turnaround time starting a debugger and run to the breakpont with lldb vs. gdb."""
from __future__ import print_function
import os
import sys
import lldb
from lldbsuite.test.lldbbench import *
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import configuration
from lldbsuite.test import lldbutil
class CompileRunToBreakpointBench(BenchBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
BenchBase.setUp(self)
self.exe = lldbtest_config.lldbExec
self.function = 'Driver::MainLoop()'
self.count = 3
self.lldb_avg = None
self.gdb_avg = None
@benchmarks_test
@no_debug_info_test
@expectedFailureAll(
oslist=["windows"],
bugnumber="llvm.org/pr22274: need a pexpect replacement for windows")
def test_run_lldb_then_gdb(self):
"""Benchmark turnaround time with lldb vs. gdb."""
print()
self.run_lldb_turnaround(self.exe, self.function, self.count)
print("lldb turnaround benchmark:", self.stopwatch)
self.run_gdb_turnaround(self.exe, self.function, self.count)
print("gdb turnaround benchmark:", self.stopwatch)
print("lldb_avg/gdb_avg: %f" % (self.lldb_avg / self.gdb_avg))
def run_lldb_turnaround(self, exe, function, count):
import pexpect
def run_one_round():
prompt = self.child_prompt
# So that the child gets torn down after the test.
self.child = pexpect.spawn(
'%s %s %s' %
(lldbtest_config.lldbExec, self.lldbOption, exe))
child = self.child
# Turn on logging for what the child sends back.
if self.TraceOn():
child.logfile_read = sys.stdout
child.expect_exact(prompt)
child.sendline('breakpoint set -F %s' % function)
child.expect_exact(prompt)
child.sendline('run')
child.expect_exact(prompt)
# Set self.child_prompt, which is "(lldb) ".
self.child_prompt = '(lldb) '
# Reset the stopwatch now.
self.stopwatch.reset()
for i in range(count + 1):
# Ignore the first invoke lldb and run to the breakpoint turnaround
# time.
if i == 0:
run_one_round()
else:
with self.stopwatch:
run_one_round()
self.child.sendline('quit')
try:
self.child.expect(pexpect.EOF)
except:
pass
self.lldb_avg = self.stopwatch.avg()
self.child = None
def run_gdb_turnaround(self, exe, function, count):
import pexpect
def run_one_round():
prompt = self.child_prompt
# So that the child gets torn down after the test.
self.child = pexpect.spawn('gdb --nx %s' % exe)
child = self.child
# Turn on logging for what the child sends back.
if self.TraceOn():
child.logfile_read = sys.stdout
child.expect_exact(prompt)
child.sendline('break %s' % function)
child.expect_exact(prompt)
child.sendline('run')
child.expect_exact(prompt)
# Set self.child_prompt, which is "(gdb) ".
self.child_prompt = '(gdb) '
# Reset the stopwatch now.
self.stopwatch.reset()
for i in range(count + 1):
# Ignore the first invoke lldb and run to the breakpoint turnaround
# time.
if i == 0:
run_one_round()
else:
with self.stopwatch:
run_one_round()
self.child.sendline('quit')
self.child.expect_exact('The program is running. Exit anyway?')
self.child.sendline('y')
try:
self.child.expect(pexpect.EOF)
except:
pass
self.gdb_avg = self.stopwatch.avg()
self.child = None
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