chrome/test/data/nacl/debug_stub_browser_tests.py

   1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 import re
   6 import sys
   7 import xml.etree.ElementTree
   8
   9 import gdb_rsp
  10
  11
  12 def GetTargetArch(connection):
  13   """Get the CPU architecture of the NaCl application."""
  14   reply = connection.RspRequest('qXfer:features:read:target.xml:0,fff')
  15   assert reply[0] == 'l', reply
  16   tree = xml.etree.ElementTree.fromstring(reply[1:])
  17   arch_tag = tree.find('architecture')
  18   assert arch_tag is not None, reply
  19   return arch_tag.text.strip()
  20
  21
  22 def ReverseBytes(byte_string):
  23   """Reverse bytes in the hex string: '09ab' -> 'ab09'. This converts
  24   little-endian number in the hex string to its normal string representation.
  25   """
  26   assert len(byte_string) % 2 == 0, byte_string
  27   return ''.join([byte_string[i - 2 : i]
  28                   for i in xrange(len(byte_string), 0, -2)])
  29
  30
  31 def GetProgCtrString(connection, arch):
  32   """Get current execution point."""
  33   registers = connection.RspRequest('g')
  34   # PC register indices can be found in
  35   # native_client/src/trusted/debug_stub/abi.cc in AbiInit function.
  36   if arch == 'i386':
  37     # eip index is 8
  38     return ReverseBytes(registers[8 * 8 : 8 * 8 + 8])
  39   if arch == 'i386:x86-64':
  40     # rip index is 16
  41     return ReverseBytes(registers[16 * 16 : 16 * 16 + 8])
  42   if arch == 'iwmmxt':
  43     # pc index is 15
  44     return ReverseBytes(registers[15 * 8 : 15 * 8 + 8])
  45   raise AssertionError('Unknown architecture: %s' % arch)
  46
  47
  48 def TestContinue(connection):
  49   result = connection.RspRequest('vCont;c')
  50   # Once the NaCl test module reports that the test passed, the NaCl <embed>
  51   # element is removed from the page and so the NaCl module is killed by
  52   # the browser what is reported as exit due to SIGKILL (X09).
  53   assert result == 'X09', result
  54
  55
  56 def TestBreakpoint(connection):
  57   # Breakpoints and single-stepping might interfere with Chrome sandbox. So we
  58   # check that they work properly in this test.
  59   arch = GetTargetArch(connection)
  60   registers = connection.RspRequest('g')
  61   pc = GetProgCtrString(connection, arch)
  62   # Set breakpoint
  63   result = connection.RspRequest('Z0,%s,1' % pc)
  64   assert result == 'OK', result
  65   # Check that we stopped at breakpoint
  66   result = connection.RspRequest('vCont;c')
  67   stop_reply = re.compile(r'T05thread:(\d+);')
  68   assert stop_reply.match(result), result
  69   thread = stop_reply.match(result).group(1)
  70   # Check that registers haven't changed
  71   result = connection.RspRequest('g')
  72   assert result == registers, (result, registers)
  73   # Remove breakpoint
  74   result = connection.RspRequest('z0,%s,1' % pc)
  75   assert result == 'OK', result
  76   # Check single stepping
  77   result = connection.RspRequest('vCont;s:%s' % thread)
  78   assert result == 'T05thread:%s;' % thread, result
  79   assert pc != GetProgCtrString(connection, arch)
  80   # Check that we terminate normally
  81   result = connection.RspRequest('vCont;c')
  82   assert result == 'X09', result
  83
  84
  85 def Main(args):
  86   port = int(args[0])
  87   name = args[1]
  88   connection = gdb_rsp.GdbRspConnection(('localhost', port))
  89   if name == 'continue':
  90     TestContinue(connection)
  91   elif name == 'breakpoint':
  92     TestBreakpoint(connection)
  93   else:
  94     raise AssertionError('Unknown test name: %r' % name)
  95
  96
  97 if __name__ == '__main__':
  98   Main(sys.argv[1:])