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     return None
  17
  18 def compile(*args):
  19     """Compile a single .c file into a binary."""
  20     dst = os.path.splitext(args[0])[0]
  21     cc = os.path.expandvars("$RISCV/bin/riscv64-unknown-elf-gcc")
  22     cmd = [cc, "-g", "-O", "-o", dst]
  23     for arg in args:
  24         found = find_file(arg)
  25         if found:
  26             cmd.append(found)
  27         else:
  28             cmd.append(arg)
  29     cmd = " ".join(cmd)
  30     result = os.system(cmd)
  31     assert result == 0, "%r failed" % cmd
  32     return dst
  33
  34 def unused_port():
  35     # http://stackoverflow.com/questions/2838244/get-open-tcp-port-in-python/2838309#2838309
  36     import socket
  37     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  38     s.bind(("",0))
  39     port = s.getsockname()[1]
  40     s.close()
  41     return port
  42
  43 class Spike(object):
  44     def __init__(self, binary, halted=False, with_gdb=True, timeout=None):
  45         """Launch spike. Return tuple of its process and the port it's running on."""
  46         cmd = []
  47         if timeout:
  48             cmd += ["timeout", str(timeout)]
  49
  50         cmd += [find_file("spike")]
  51         if halted:
  52             cmd.append('-H')
  53         if with_gdb:
  54             self.port = unused_port()
  55             cmd += ['--gdb-port', str(self.port)]
  56         cmd.append('pk')
  57         if binary:
  58             cmd.append(binary)
  59         logfile = open("spike.log", "w")
  60         self.process = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=logfile,
  61                 stderr=logfile)
  62
  63     def __del__(self):
  64         try:
  65             self.process.kill()
  66             self.process.wait()
  67         except OSError:
  68             pass
  69
  70     def wait(self, *args, **kwargs):
  71         return self.process.wait(*args, **kwargs)
  72
  73 class Gdb(object):
  74     def __init__(self):
  75         path = os.path.expandvars("$RISCV/bin/riscv64-unknown-elf-gdb")
  76         self.child = pexpect.spawn(path)
  77         self.child.logfile = file("gdb.log", "w")
  78         self.wait()
  79         self.command("set width 0")
  80         self.command("set height 0")
  81         # Force consistency.
  82         self.command("set print entry-values no")
  83
  84     def wait(self):
  85         """Wait for prompt."""
  86         self.child.expect("\(gdb\)")
  87
  88     def command(self, command, timeout=-1):
  89         self.child.sendline(command)
  90         self.child.expect("\n", timeout=timeout)
  91         self.child.expect("\(gdb\)", timeout=timeout)
  92         return self.child.before.strip()
  93
  94     def c(self, wait=True):
  95         if wait:
  96             return self.command("c")
  97         else:
  98             self.child.sendline("c")
  99             self.child.expect("Continuing")
 100
 101     def interrupt(self):
 102         self.child.send("\003");
 103         self.child.expect("\(gdb\)")
 104
 105     def x(self, address, size='w'):
 106         output = self.command("x/%s %s" % (size, address))
 107         value = int(output.split(':')[1].strip(), 0)
 108         return value
 109
 110     def p(self, obj):
 111         output = self.command("p %s" % obj)
 112         value = int(output.split('=')[-1].strip())
 113         return value
 114
 115     def stepi(self):
 116         return self.command("stepi")