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"""Test lldb's response time for 'frame variable' command."""
from __future__ import print_function
import use_lldb_suite
import os, sys
import lldb
from lldbbench import *
class FrameVariableResponseBench(BenchBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
BenchBase.setUp(self)
if lldb.bmExecutable:
self.exe = lldb.bmExecutable
else:
self.exe = lldbtest_config.lldbExec
if lldb.bmBreakpointSpec:
self.break_spec = lldb.bmBreakpointSpec
else:
self.break_spec = '-n main'
self.count = lldb.bmIterationCount
if self.count <= 0:
self.count = 20
@benchmarks_test
@no_debug_info_test
@expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
def test_startup_delay(self):
"""Test response time for the 'frame variable' command."""
print()
self.run_frame_variable_bench(self.exe, self.break_spec, self.count)
print("lldb frame variable benchmark:", self.stopwatch)
def run_frame_variable_bench(self, exe, break_spec, count):
import pexpect
# Set self.child_prompt, which is "(lldb) ".
self.child_prompt = '(lldb) '
prompt = self.child_prompt
# Reset the stopwatchs now.
self.stopwatch.reset()
for i in range(count):
# 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
# Set our breakpoint.
child.sendline('breakpoint set %s' % break_spec)
child.expect_exact(prompt)
# Run the target and expect it to be stopped due to breakpoint.
child.sendline('run') # Aka 'process launch'.
child.expect_exact(prompt)
with self.stopwatch:
# Measure the 'frame variable' response time.
child.sendline('frame variable')
child.expect_exact(prompt)
child.sendline('quit')
try:
self.child.expect(pexpect.EOF)
except:
pass
# The test is about to end and if we come to here, the child process has
# been terminated. Mark it so.
self.child = None
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