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"""Test lldb's startup delays creating a target, setting a breakpoint, and run to breakpoint stop."""
import sys
import lldb
from lldbsuite.test import configuration
from lldbsuite.test import lldbtest_config
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbbench import *
class StartupDelaysBench(BenchBase):
def setUp(self):
BenchBase.setUp(self)
# Create self.stopwatch2 for measuring "set first breakpoint".
# The default self.stopwatch is for "create fresh target".
self.stopwatch2 = Stopwatch()
# Create self.stopwatch3 for measuring "run to breakpoint".
self.stopwatch3 = Stopwatch()
self.exe = lldbtest_config.lldbExec
self.break_spec = "-n main"
self.count = 30
@benchmarks_test
@no_debug_info_test
@expectedFailureAll(
oslist=["windows"],
bugnumber="llvm.org/pr22274: need a pexpect replacement for windows",
)
def test_startup_delay(self):
"""Test start up delays creating a target, setting a breakpoint, and run to breakpoint stop."""
print()
self.run_startup_delays_bench(self.exe, self.break_spec, self.count)
print("lldb startup delay (create fresh target) benchmark:", self.stopwatch)
print("lldb startup delay (set first breakpoint) benchmark:", self.stopwatch2)
print("lldb startup delay (run to breakpoint) benchmark:", self.stopwatch3)
def run_startup_delays_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()
self.stopwatch2.reset()
for i in range(count):
# So that the child gets torn down after the test.
self.child = pexpect.spawn(
"%s %s" % (lldbtest_config.lldbExec, self.lldbOption)
)
child = self.child
# Turn on logging for what the child sends back.
if self.TraceOn():
child.logfile_read = sys.stdout
with self.stopwatch:
# Create a fresh target.
child.sendline("file %s" % exe) # Aka 'target create'.
child.expect_exact(prompt)
with self.stopwatch2:
# Read debug info and set the first breakpoint.
child.sendline("breakpoint set %s" % break_spec)
child.expect_exact(prompt)
with self.stopwatch3:
# Run to the breakpoint just set.
child.sendline("run")
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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