reywood

How to get a stack trace for each thread in a running python script

Sometimes a python script will simply hang forever with no indication of where things went wrong. Perhaps it's polling a service that will never return a value that allows the program to move forward. Here's a way to see where the program is currently stuck.

Install gdb and pyrasite

Install gdb.

# Redhat, CentOS, etc

scumjr

/*
 * CVE-2016-5195 dirtypoc
 *
 * This PoC is memory only and doesn't write anything on the filesystem.
 * /!\ Beware, it triggers a kernel crash a few minutes.
 *
 * gcc -Wall -o dirtycow-mem dirtycow-mem.c -ldl -lpthread
 */

#define _GNU_SOURCE

janlay

Install

1. Modify index.txt with your output path and proxy info
2. Use Text Builder to build configuration for Surge: $ text-builder -index /path/to/index.txt Or run $ sh build-all to build all your index files.
3. Import configuration via AirDrop/iTunes/Dropbox/iCloud

本人不提供任何保证和技术支持，使用者自负风险。
There are no guarantees, no any support. Use it at your own risk.

mattbierner

#include <utility>

using iochar = char;
using memval = unsigned char;

/* BF Memory Cell */
template <memval val = 0>
struct Cell {
    enum { value = val };
    

liuyu81

#include "Python.h" // should be before any standard headers
#include <errno.h>
#include <pthread.h>

static void*
non_python_thread(void *python_callback) {
  //XXX without PyEval_InitThreads() it produces:
  // Fatal Python error: PyEval_SaveThread: NULL tstate
  //XXX with PyEval_InitThreads() it deadlocks!!
  //XXX without PyGILState_*() (with/without PyEval_InitThreads()) it produces: