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"""Test lldb's stepping speed."""
import sys
import lldb
from lldbsuite.test import configuration
from lldbsuite.test import lldbtest_config
from lldbsuite.test.lldbbench import *
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class SteppingSpeedBench(BenchBase):
def setUp(self):
BenchBase.setUp(self)
self.exe = lldbtest_config.lldbExec
self.break_spec = "-n main"
self.count = 50
self.trace("self.exe=%s" % self.exe)
self.trace("self.break_spec=%s" % self.break_spec)
@benchmarks_test
@no_debug_info_test
@expectedFailureAll(
oslist=["windows"],
bugnumber="llvm.org/pr22274: need a pexpect replacement for windows",
)
def test_run_lldb_steppings(self):
"""Test lldb steppings on a large executable."""
print()
self.run_lldb_steppings(self.exe, self.break_spec, self.count)
print("lldb stepping benchmark:", self.stopwatch)
def run_lldb_steppings(self, exe, break_spec, count):
import pexpect
# 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" % (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 %s" % break_spec)
child.expect_exact(prompt)
child.sendline("run")
child.expect_exact(prompt)
# Reset the stopwatch now.
self.stopwatch.reset()
for i in range(count):
with self.stopwatch:
# Disassemble the function.
child.sendline("next") # Aka 'thread step-over'.
child.expect_exact(prompt)
child.sendline("quit")
try:
self.child.expect(pexpect.EOF)
except:
pass
self.child = None
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