Home | History | Annotate | Download | only in frame_variable 
      1 """Test lldb's response time for 'frame variable' command."""
      2 
      3 import os, sys
      4 import unittest2
      5 import lldb
      6 import pexpect
      7 from lldbbench import *
      8 
      9 class FrameVariableResponseBench(BenchBase):
     10 
     11     mydir = os.path.join("benchmarks", "frame_variable")
     12 
     13     def setUp(self):
     14         BenchBase.setUp(self)
     15         if lldb.bmExecutable:
     16             self.exe = lldb.bmExecutable
     17         else:
     18             self.exe = self.lldbHere
     19         if lldb.bmBreakpointSpec:
     20             self.break_spec = lldb.bmBreakpointSpec
     21         else:
     22             self.break_spec = '-n main'
     23 
     24         self.count = lldb.bmIterationCount
     25         if self.count <= 0:
     26             self.count = 20
     27 
     28     @benchmarks_test
     29     def test_startup_delay(self):
     30         """Test response time for the 'frame variable' command."""
     31         print
     32         self.run_frame_variable_bench(self.exe, self.break_spec, self.count)
     33         print "lldb frame variable benchmark:", self.stopwatch
     34 
     35     def run_frame_variable_bench(self, exe, break_spec, count):
     36         # Set self.child_prompt, which is "(lldb) ".
     37         self.child_prompt = '(lldb) '
     38         prompt = self.child_prompt
     39 
     40         # Reset the stopwatchs now.
     41         self.stopwatch.reset()
     42         for i in range(count):
     43             # So that the child gets torn down after the test.
     44             self.child = pexpect.spawn('%s %s %s' % (self.lldbHere, self.lldbOption, exe))
     45             child = self.child
     46 
     47             # Turn on logging for what the child sends back.
     48             if self.TraceOn():
     49                 child.logfile_read = sys.stdout
     50 
     51             # Set our breakpoint.
     52             child.sendline('breakpoint set %s' % break_spec)
     53             child.expect_exact(prompt)
     54 
     55             # Run the target and expect it to be stopped due to breakpoint.
     56             child.sendline('run') # Aka 'process launch'.
     57             child.expect_exact(prompt)
     58         
     59             with self.stopwatch:
     60                 # Measure the 'frame variable' response time.
     61                 child.sendline('frame variable')
     62                 child.expect_exact(prompt)
     63 
     64             child.sendline('quit')
     65             try:
     66                 self.child.expect(pexpect.EOF)
     67             except:
     68                 pass
     69 
     70         # The test is about to end and if we come to here, the child process has
     71         # been terminated.  Mark it so.
     72         self.child = None
     73 
     74 
     75 if __name__ == '__main__':
     76     import atexit
     77     lldb.SBDebugger.Initialize()
     78     atexit.register(lambda: lldb.SBDebugger.Terminate())
     79     unittest2.main()
     80