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 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(
  28             "Debugger '%s' does not exist or is not an executable..\n" % gdb_path
  29         )
  30
  31
  32 def start_vpp_in_gdb():
  33     # here we use SanityTestCase as a dummy to inherit functionality,
  34     # but any test case class could be used ...
  35     SanityTestCase.set_debug_flags("attach")
  36     SanityTestCase.tempdir = SanityTestCase.get_tempdir()
  37     SanityTestCase.assign_cpus(available_cpus[: SanityTestCase.get_cpus_required()])
  38     SanityTestCase.setUpConstants()
  39     vpp_cmdline = SanityTestCase.vpp_cmdline
  40     print("Hacking cmdline to make VPP interactive.")
  41     vpp_cmdline.insert(vpp_cmdline.index("nodaemon"), "interactive")
  42     print("VPP cmdline is %s" % " ".join(vpp_cmdline))
  43     print("Running GDB.")
  44
  45     if os.path.isfile(gdb_path) and os.access(gdb_path, os.X_OK):
  46         gdb_cmdline = "%s --args %s " % (gdb_path, " ".join(vpp_cmdline))
  47         print("GDB cmdline is %s" % gdb_cmdline)
  48         gdb = pexpect.spawn(gdb_cmdline)
  49         gdb.interact()
  50         try:
  51             gdb.terminate(True)
  52         except:
  53             pass
  54         if gdb.isalive():
  55             raise Exception("GDB refused to die...")
  56     else:
  57         sys.stderr.write(
  58             "Debugger '%s' does not exist or is not an executable..\n" % gdb_path
  59         )