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#!/usr/bin/env python3
def launch():
if len(sys.argv) < 3:
sys.stderr.write("Syntax: {} <pid> <count> [<dir>]\n".format(os.path.basename(sys.argv[0])))
sys.exit(1)
pid = int(sys.argv[1])
count = int(sys.argv[2])
base = os.getcwd()
if len(sys.argv) > 3:
base = sys.argv[3]
base = os.path.realpath(base)
subprocess.run([
"gdb", "-batch",
"-p", str(pid),
"-ex", "py arg_count = {}".format(count),
"-ex", "py arg_dir = '{}'".format(base),
"-x", __file__
])
class GFCore(object):
def __init__(self, count, base):
self.count = count
self.base = base
gdb.execute('set pagination off')
gdb.execute('set gf_signal_on_assert = 1')
gdb.events.stop.connect(self.gf_stop)
self.cont()
def cont(self, quit = False):
if not(quit) and (self.count > 0):
gdb.execute('continue')
else:
gdb.execute('set gf_signal_on_assert = 0')
gdb.execute('quit')
def gf_stop(self, event):
quit = False
if isinstance(event, gdb.SignalEvent):
if event.stop_signal == 'SIGCONT':
now = datetime.utcnow().isoformat()
pid = gdb.selected_inferior().pid
name = "{}/gfcore.{}.{}".format(self.base, pid, now)
print("Generating coredump '{}'".format(name))
gdb.execute('gcore {}'.format(name))
self.count -= 1
elif event.stop_signal == 'SIGINT':
print("SIGINT received. Exiting")
quit = True
else:
print("Ignoring signal {}".format(event.stop_signal))
else:
print("Unexpected event {}".format(type(event)))
self.cont(quit)
# Module 'gdb' is not available when running outside gdb.
try:
import gdb
from datetime import datetime
GFCore(arg_count, arg_dir)
except ModuleNotFoundError:
import sys
import os
import subprocess
try:
launch()
except KeyboardInterrupt:
pass
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