debugging

问题 The Problem Xcode (Version 4.6.1 (4H512)) is complaining a duplicate symbole problem. duplicate symbol _OBJC_METACLASS_$_PacksStoreHelper in: /Users/shannoga/Library/Developer/Xcode/DerivedData/English_Club-cyrjamihpabtvtdkvctjwyidupuo/Build/Intermediates/English Club.build/Debug-iphonesimulator/English Club.build/Objects-normal/i386/PacksStoreViewController.o /Users/shannoga/Library/Developer/Xcode/DerivedData/English_Club-cyrjamihpabtvtdkvctjwyidupuo/Build/Intermediates/English Club.build

问题 While debugging through a .NET 3.5 SP1 project which is contacting a local web service, I'm receiving the exception System.BadImageFormatException: "Bad Class Token" Of course there aren't much more details about what's causing the exception. I can tell that the method where this occurs, which is in the same class as it's caller, the debugger fails to reach. This exception occurs on the call of the method that contacts the web service. I do have other methods communicating with the web

问题 I got this problem on different C projects when using gdb . If I run my program without it, it crashes consistently at a given event probably because of a invalid read of the memory. I try debugging it with gdb but when I do so, the crash seems to never occur ! Any idea why this could happen ? I'm using mingw toolchain on Windows. 回答1: Yes, it sounds like a race condition or heap corruption or something else that is usually responsible for Heisenbugs. The problem is that your code is likely

问题 I got this problem on different C projects when using gdb . If I run my program without it, it crashes consistently at a given event probably because of a invalid read of the memory. I try debugging it with gdb but when I do so, the crash seems to never occur ! Any idea why this could happen ? I'm using mingw toolchain on Windows. 回答1: Yes, it sounds like a race condition or heap corruption or something else that is usually responsible for Heisenbugs. The problem is that your code is likely

问题 I am having trouble with getting the progressbar to start. I have scoured the internet for answers, and have tried multiple ways for hours, but have been rewarded with errors such as: TypeError: unbound method start() must be called with Progressbar instance as first argument (got nothing instead) TypeError: unbound method start() must be called with Progressbar instance as first argument (got NoneType instance instead) AttributeError: 'NoneType' object has no attribute 'stop' Here is

问题 I have just noticed something weird, when I add the "virtual keyword" in my class (any function except the constructor), I can't display the content of my object in GDB. GDB says "incomplete type" Here is the code : //////////////// reco.h ///////////// #ifndef RECO_H #define RECO_H #include <iostream> #include <string> class reco { public: reco(float weight); ~reco(void); float getWeight(); private: float weight; }; #endif ///////////////// reco.cpp ///////////// #include <iostream> #include

问题 I wrote a little program which downloads the latest daily tide graph from NOAA, adds a text table to the image containing tidal information, and then sets this image as my desktop wallpaper. from bs4 import BeautifulSoup import Image, ImageDraw, ImageFont from urllib import urlretrieve import urllib2 import time import ctypes import sys import os import datetime import traceback def Fetch_tideGraph(): # Fetch the Tides Graph .gif # # Fetch the Station Home Page try: url = 'http:/

问题 Here is a function in my program void quicksort (int *num, int p, int r, int june) { int q, bbc, ccd; if (p < r) { call++; q = partition (num, p, r, june);//<--I want to skip this call in gdb session bbc = q - 1 - p + 1;//<-- and want to continue execution step by step from here quicksort (num, p, q - 1, bbc); ccd=r-q+1; quicksort (num, q + 1, r, ccd); } } //since it is a recursive function each time quicksort is called partition is also executed I want to focus my debugging only to quicksort

问题 Here is a function in my program void quicksort (int *num, int p, int r, int june) { int q, bbc, ccd; if (p < r) { call++; q = partition (num, p, r, june);//<--I want to skip this call in gdb session bbc = q - 1 - p + 1;//<-- and want to continue execution step by step from here quicksort (num, p, q - 1, bbc); ccd=r-q+1; quicksort (num, q + 1, r, ccd); } } //since it is a recursive function each time quicksort is called partition is also executed I want to focus my debugging only to quicksort

问题 I enabled ftrace event tracing for sys_enter_openat syscall. The respective output format given at events/syscalls/sys_enter_openat/format is print fmt: "dfd: 0x%08lx, filename: 0x%08lx, flags: 0x%08lx, mode: 0x%08lx", ((unsigned long)(REC->dfd)), ((unsigned long)(REC->filename)), ((unsigned long)(REC->flags)), ((unsigned long)(REC->mode)) As expected a sample output line to ftrace is something like msm_irqbalance-1338 [000] ...1 211710.033931: sys_openat(dfd: ffffff9c, filename: 5af693f224,