"""Test evaluating expressions repeatedly comparing lldb against gdb.""" | |
import os, sys | |
import unittest2 | |
import lldb | |
from lldbbench import * | |
class RepeatedExprsCase(BenchBase): | |
mydir = TestBase.compute_mydir(__file__) | |
def setUp(self): | |
BenchBase.setUp(self) | |
self.source = 'main.cpp' | |
self.line_to_break = line_number(self.source, '// Set breakpoint here.') | |
self.lldb_avg = None | |
self.gdb_avg = None | |
self.count = lldb.bmIterationCount | |
if self.count <= 0: | |
self.count = 100 | |
@benchmarks_test | |
def test_compare_lldb_to_gdb(self): | |
"""Test repeated expressions with lldb vs. gdb.""" | |
self.buildDefault() | |
self.exe_name = 'a.out' | |
self.run_lldb_repeated_exprs(self.exe_name, self.count) | |
print "lldb benchmark:", self.stopwatch | |
self.run_gdb_repeated_exprs(self.exe_name, self.count) | |
print "gdb benchmark:", self.stopwatch | |
print "lldb_avg/gdb_avg: %f" % (self.lldb_avg/self.gdb_avg) | |
def run_lldb_repeated_exprs(self, exe_name, count): | |
import pexpect | |
exe = os.path.join(os.getcwd(), exe_name) | |
# Set self.child_prompt, which is "(lldb) ". | |
self.child_prompt = '(lldb) ' | |
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 -l %d' % (self.source, self.line_to_break)) | |
child.expect_exact(prompt) | |
child.sendline('run') | |
child.expect_exact(prompt) | |
expr_cmd1 = 'expr ptr[j]->point.x' | |
expr_cmd2 = 'expr ptr[j]->point.y' | |
# Reset the stopwatch now. | |
self.stopwatch.reset() | |
for i in range(count): | |
with self.stopwatch: | |
child.sendline(expr_cmd1) | |
child.expect_exact(prompt) | |
child.sendline(expr_cmd2) | |
child.expect_exact(prompt) | |
child.sendline('process continue') | |
child.expect_exact(prompt) | |
child.sendline('quit') | |
try: | |
self.child.expect(pexpect.EOF) | |
except: | |
pass | |
self.lldb_avg = self.stopwatch.avg() | |
if self.TraceOn(): | |
print "lldb expression benchmark:", str(self.stopwatch) | |
self.child = None | |
def run_gdb_repeated_exprs(self, exe_name, count): | |
import pexpect | |
exe = os.path.join(os.getcwd(), exe_name) | |
# Set self.child_prompt, which is "(gdb) ". | |
self.child_prompt = '(gdb) ' | |
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:%d' % (self.source, self.line_to_break)) | |
child.expect_exact(prompt) | |
child.sendline('run') | |
child.expect_exact(prompt) | |
expr_cmd1 = 'print ptr[j]->point.x' | |
expr_cmd2 = 'print ptr[j]->point.y' | |
# Reset the stopwatch now. | |
self.stopwatch.reset() | |
for i in range(count): | |
with self.stopwatch: | |
child.sendline(expr_cmd1) | |
child.expect_exact(prompt) | |
child.sendline(expr_cmd2) | |
child.expect_exact(prompt) | |
child.sendline('continue') | |
child.expect_exact(prompt) | |
child.sendline('quit') | |
child.expect_exact('The program is running. Exit anyway?') | |
child.sendline('y') | |
try: | |
self.child.expect(pexpect.EOF) | |
except: | |
pass | |
self.gdb_avg = self.stopwatch.avg() | |
if self.TraceOn(): | |
print "gdb expression benchmark:", str(self.stopwatch) | |
self.child = None | |
if __name__ == '__main__': | |
import atexit | |
lldb.SBDebugger.Initialize() | |
atexit.register(lambda: lldb.SBDebugger.Terminate()) | |
unittest2.main() |