test/debug.py

   1 """ debug utilities """
   2
   3 import os
   4 import pexpect
   5 import sys
   6
   7 from sanity_run_vpp import SanityTestCase
   8 from shutil import rmtree
   9
  10 gdb_path = '/usr/bin/gdb'
  11
  12
  13 def spawn_gdb(binary_path, core_path):
  14     if os.path.isfile(gdb_path) and os.access(gdb_path, os.X_OK):
  15         # automatically attach gdb
  16         gdb_cmdline = "%s %s %s" % (gdb_path, binary_path, core_path)
  17         gdb = pexpect.spawn(gdb_cmdline)
  18         gdb.interact()
  19         try:
  20             gdb.terminate(True)
  21         except:
  22             pass
  23         if gdb.isalive():
  24             raise Exception("GDB refused to die...")
  25     else:
  26         sys.stderr.write("Debugger '%s' does not exist or is not "
  27                          "an executable..\n" % gdb_path)
  28
  29
  30 def start_vpp_in_gdb():
  31     # here we use SanityTestCase as a dummy to inherit functionality,
  32     # but any test case class could be used ...
  33     SanityTestCase.set_debug_flags("attach")
  34     SanityTestCase.tempdir = SanityTestCase.get_tempdir()
  35     if os.path.exists(SanityTestCase.tempdir):
  36         if os.getenv("VPP_IN_GDB_NO_RMDIR", "0") in ["1", "y", "yes"]:
  37             raise FileExistsError(
  38                 "Temporary directory exists and removal denied.")
  39         print("Removing existing temp dir '%s'." % SanityTestCase.tempdir)
  40         rmtree(SanityTestCase.tempdir)
  41     print("Creating temp dir '%s'." % SanityTestCase.tempdir)
  42     os.mkdir(SanityTestCase.tempdir)
  43     SanityTestCase.setUpConstants()
  44     vpp_cmdline = SanityTestCase.vpp_cmdline
  45     if os.getenv("VPP_IN_GDB_CMDLINE", "y").lower() in ["1", "y", "yes"]:
  46         print("Hacking cmdline to make VPP interactive.")
  47         vpp_cmdline.insert(vpp_cmdline.index("nodaemon"), "interactive")
  48     print("VPP cmdline is %s" % " ".join(vpp_cmdline))
  49     print("Running GDB.")
  50
  51     if os.path.isfile(gdb_path) and os.access(gdb_path, os.X_OK):
  52         gdb_cmdline = "%s --args %s " % (gdb_path, " ".join(vpp_cmdline))
  53         print("GDB cmdline is %s" % gdb_cmdline)
  54         gdb = pexpect.spawn(gdb_cmdline)
  55         gdb.interact()
  56         try:
  57             gdb.terminate(True)
  58         except:
  59             pass
  60         if gdb.isalive():
  61             raise Exception("GDB refused to die...")
  62     else:
  63         sys.stderr.write("Debugger '%s' does not exist or is not "
  64                          "an executable..\n" % gdb_path)