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