packages/Python/lldbsuite/test/benchmarks/disassembly/TestXcode41Vs42GDBDisassembly.py

   1 """Disassemble lldb's Driver::MainLoop() functions comparing Xcode 4.1 vs. 4.2's gdb."""
   2
   3 from __future__ import print_function
   4
   5
   6 import os
   7 import sys
   8 import lldb
   9 from lldbsuite.test.decorators import *
  10 from lldbsuite.test.lldbbench import *
  11 from lldbsuite.test.lldbtest import *
  12 from lldbsuite.test import configuration
  13 from lldbsuite.test import lldbutil
  14
  15
  16 class XCode41Vs42GDBDisassembly(BenchBase):
  17
  18     mydir = TestBase.compute_mydir(__file__)
  19
  20     def setUp(self):
  21         BenchBase.setUp(self)
  22         self.gdb_41_exe = '/Xcode41/usr/bin/gdb'
  23         self.gdb_42_exe = '/Developer/usr/bin/gdb'
  24         self.exe = lldbtest_config.lldbExec
  25         self.function = 'Driver::MainLoop()'
  26         self.gdb_41_avg = None
  27         self.gdb_42_avg = None
  28         self.count = 5
  29
  30     @benchmarks_test
  31     @no_debug_info_test
  32     @expectedFailureAll(
  33         oslist=["windows"],
  34         bugnumber="llvm.org/pr22274: need a pexpect replacement for windows")
  35     def test_run_41_then_42(self):
  36         """Test disassembly on a large function with 4.1 vs. 4.2's gdb."""
  37         print()
  38         self.run_gdb_disassembly(
  39             self.gdb_41_exe,
  40             self.exe,
  41             self.function,
  42             self.count)
  43         print("4.1 gdb benchmark:", self.stopwatch)
  44         self.gdb_41_avg = self.stopwatch.avg()
  45         self.run_gdb_disassembly(
  46             self.gdb_42_exe,
  47             self.exe,
  48             self.function,
  49             self.count)
  50         print("4.2 gdb benchmark:", self.stopwatch)
  51         self.gdb_42_avg = self.stopwatch.avg()
  52         print("gdb_42_avg/gdb_41_avg: %f" %
  53               (self.gdb_42_avg / self.gdb_41_avg))
  54
  55     @benchmarks_test
  56     @no_debug_info_test
  57     @expectedFailureAll(
  58         oslist=["windows"],
  59         bugnumber="llvm.org/pr22274: need a pexpect replacement for windows")
  60     def test_run_42_then_41(self):
  61         """Test disassembly on a large function with 4.1 vs. 4.2's gdb."""
  62         print()
  63         self.run_gdb_disassembly(
  64             self.gdb_42_exe,
  65             self.exe,
  66             self.function,
  67             self.count)
  68         print("4.2 gdb benchmark:", self.stopwatch)
  69         self.gdb_42_avg = self.stopwatch.avg()
  70         self.run_gdb_disassembly(
  71             self.gdb_41_exe,
  72             self.exe,
  73             self.function,
  74             self.count)
  75         print("4.1 gdb benchmark:", self.stopwatch)
  76         self.gdb_41_avg = self.stopwatch.avg()
  77         print("gdb_42_avg/gdb_41_avg: %f" %
  78               (self.gdb_42_avg / self.gdb_41_avg))
  79
  80     def run_gdb_disassembly(self, gdb_exe_path, exe, function, count):
  81         import pexpect
  82         # Set self.child_prompt, which is "(gdb) ".
  83         self.child_prompt = '(gdb) '
  84         prompt = self.child_prompt
  85
  86         # So that the child gets torn down after the test.
  87         self.child = pexpect.spawn('%s --nx %s' % (gdb_exe_path, exe))
  88         child = self.child
  89
  90         # Turn on logging for what the child sends back.
  91         if self.TraceOn():
  92             child.logfile_read = sys.stdout
  93
  94         child.expect_exact(prompt)
  95         child.sendline('break %s' % function)
  96         child.expect_exact(prompt)
  97         child.sendline('run')
  98         child.expect_exact(prompt)
  99
 100         # Reset the stopwatch now.
 101         self.stopwatch.reset()
 102         for i in range(count):
 103             with self.stopwatch:
 104                 # Disassemble the function.
 105                 child.sendline('disassemble')
 106                 child.expect_exact(prompt)
 107             child.sendline('next')
 108             child.expect_exact(prompt)
 109
 110         child.sendline('quit')
 111         child.expect_exact('The program is running.  Exit anyway?')
 112         child.sendline('y')
 113         try:
 114             self.child.expect(pexpect.EOF)
 115         except:
 116             pass
 117
 118         if self.TraceOn():
 119             print("gdb disassembly benchmark:", str(self.stopwatch))
 120         self.child = None