"""Benchmark the turnaround time starting a debugger and run to the breakpont with lldb vs. gdb.""" | |
import os, sys | |
import unittest2 | |
import lldb | |
from lldbbench import * | |
class CompileRunToBreakpointBench(BenchBase): | |
mydir = TestBase.compute_mydir(__file__) | |
def setUp(self): | |
BenchBase.setUp(self) | |
self.exe = self.lldbHere | |
self.function = 'Driver::MainLoop()' | |
self.count = lldb.bmIterationCount | |
if self.count <= 0: | |
self.count = 3 | |
self.lldb_avg = None | |
self.gdb_avg = None | |
@benchmarks_test | |
def test_run_lldb_then_gdb(self): | |
"""Benchmark turnaround time with lldb vs. gdb.""" | |
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' % (self.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 | |
if __name__ == '__main__': | |
import atexit | |
lldb.SBDebugger.Initialize() | |
atexit.register(lambda: lldb.SBDebugger.Terminate()) | |
unittest2.main() |