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""" debug utilities """
import os
import pexpect
import sys
from sanity_run_vpp import SanityTestCase
from shutil import rmtree
from cpu_config import available_cpus
gdb_path = '/usr/bin/gdb'
def spawn_gdb(binary_path, core_path):
if os.path.isfile(gdb_path) and os.access(gdb_path, os.X_OK):
# automatically attach gdb
gdb_cmdline = "%s %s %s" % (gdb_path, binary_path, core_path)
gdb = pexpect.spawn(gdb_cmdline)
gdb.interact()
try:
gdb.terminate(True)
except:
pass
if gdb.isalive():
raise Exception("GDB refused to die...")
else:
sys.stderr.write("Debugger '%s' does not exist or is not "
"an executable..\n" % gdb_path)
def start_vpp_in_gdb():
# here we use SanityTestCase as a dummy to inherit functionality,
# but any test case class could be used ...
SanityTestCase.set_debug_flags("attach")
SanityTestCase.tempdir = SanityTestCase.get_tempdir()
if os.path.exists(SanityTestCase.tempdir):
if os.getenv("VPP_IN_GDB_NO_RMDIR", "0") in ["1", "y", "yes"]:
raise FileExistsError(
"Temporary directory exists and removal denied.")
print("Removing existing temp dir '%s'." % SanityTestCase.tempdir)
rmtree(SanityTestCase.tempdir)
print("Creating temp dir '%s'." % SanityTestCase.tempdir)
os.mkdir(SanityTestCase.tempdir)
SanityTestCase.assign_cpus(
available_cpus[:SanityTestCase.get_cpus_required()])
SanityTestCase.setUpConstants()
vpp_cmdline = SanityTestCase.vpp_cmdline
if os.getenv("VPP_IN_GDB_CMDLINE", "y").lower() in ["1", "y", "yes"]:
print("Hacking cmdline to make VPP interactive.")
vpp_cmdline.insert(vpp_cmdline.index("nodaemon"), "interactive")
print("VPP cmdline is %s" % " ".join(vpp_cmdline))
print("Running GDB.")
if os.path.isfile(gdb_path) and os.access(gdb_path, os.X_OK):
gdb_cmdline = "%s --args %s " % (gdb_path, " ".join(vpp_cmdline))
print("GDB cmdline is %s" % gdb_cmdline)
gdb = pexpect.spawn(gdb_cmdline)
gdb.interact()
try:
gdb.terminate(True)
except:
pass
if gdb.isalive():
raise Exception("GDB refused to die...")
else:
sys.stderr.write("Debugger '%s' does not exist or is not "
"an executable..\n" % gdb_path)
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