tests/testlib.py

   1 import os.path
   2 import pexpect
   3 import subprocess
   4 import tempfile
   5 import testlib
   6 import unittest
   7
   8 # Note that gdb comes with its own testsuite. I was unable to figure out how to
   9 # run that testsuite against the spike simulator.
  10
  11 def find_file(path):
  12     for directory in (os.getcwd(), os.path.dirname(testlib.__file__)):
  13         fullpath = os.path.join(directory, path)
  14         if os.path.exists(fullpath):
  15             return fullpath
  16     raise ValueError("Couldn't find %r." % path)
  17
  18 def compile(src):
  19     """Compile a single .c file into a binary."""
  20     src = find_file(src)
  21     dst = os.path.splitext(src)[0]
  22     cc = os.path.expandvars("$RISCV/bin/riscv64-unknown-elf-gcc")
  23     cmd = "%s -g -o %s %s" % (cc, dst, src)
  24     result = os.system(cmd)
  25     assert result == 0, "%r failed" % cmd
  26     return dst
  27
  28 def spike(binary, halted=False):
  29     cmd = [find_file("spike")]
  30     if halted:
  31         cmd.append('-H')
  32     cmd += ['pk', binary]
  33     logfile = open("spike.log", "w")
  34     return subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=logfile, stderr=logfile)
  35
  36 class Gdb(object):
  37     def __init__(self):
  38         path = os.path.expandvars("$RISCV/bin/riscv64-unknown-elf-gdb")
  39         self.child = pexpect.spawn(path)
  40         self.child.logfile = file("gdb.log", "w")
  41         self.wait()
  42         self.command("set width 0")
  43         self.command("set height 0")
  44
  45     def wait(self):
  46         """Wait for prompt."""
  47         self.child.expect("\(gdb\)")
  48
  49     def command(self, command):
  50         self.child.sendline(command)
  51         self.child.expect("\n")
  52         self.child.expect("\(gdb\)")
  53         return self.child.before.strip()
  54
  55     def x(self, address, size='w'):
  56         output = self.command("x/%s %s" % (size, address))
  57         value = int(output.split(':')[1].strip(), 0)
  58         return value
  59
  60     def p(self, obj):
  61         output = self.command("p %s" % obj)
  62         value = int(output.split('=')[-1].strip())
  63         return value
  64
  65     def stepi(self):
  66         return self.command("stepi")