breakpoints

问题 I'm using Anjuta and gdb on Fedora 20 and created a C Makefile project. The code looks like this: #include <stdio.h> int main (void) { ° printf ("1"); ° printf ("2"); ° printf ("3"); return (0); } ° means I set a breakpoint at that position. Now when I debug the code, there's no output while the current line is one of these printf-functions. Only when I exit main '123' appears in the terminal. If I add \n to the second printf argument, then '12' appears as output when I move from breakpoint 2

问题 I'm getting an EXC_BREAKPOINT (EXC_ARM_BREAKPOINT, subcode=0xe7ffdefe) error while running my app on a iOS7 device. The thing is, it runs smoothly on iOS7 simulator. By using breakpoints, I've found the error occurs in line 6. required init(coder aDecoder: NSCoder) { personPicker = ABPeoplePickerNavigationController() super.init(coder: aDecoder) personPicker.peoplePickerDelegate = self } /*error line*/ @IBAction func BPressed(sender: AnyObject) { self.presentViewController(personPicker,

问题 I am getting the following debugger error when I encounter a breakpoint on the device: Error from Debugger: Previous frame inner to this frame (gdb could not unwind past this frame) This occurs when the app hits a breakpoint. If I hit the continue button in the debugger, it continues happily until the next breakpoint, when it pops up the same issue. What does this message mean, and more importantly how can I fix it? I have been debugging this app for a long time without ever encountering this

问题 Every time I refresh my web app with the Chrome Inspector open it pauses and takes me to the sources tab with a big red arrow icon pointing to some weird line inside jQuery. I see Paused in debugger in the top-middle of the window, and Paused on exception: DOMException in the Call Stack on the sources tab. As far as I'm aware, I haven't set any breakpoints and this code wasn't throwing exceptions before - so what's going on? 回答1: That little pause icon in the lower left. Should be black in

问题 What is the difference between hardware and software breakpoints? Are hardware breakpoints are said to be faster than software breakpoints, if yes then how, and also then why would we need the software breakpoints at all? 回答1: This article provides a good discussion of pros and cons: http://www.nynaeve.net/?p=80 To answer your question directly software breakpoints are more flexible because hardware breakpoints are limited in some functionality and highly architecture-dependant. One example

问题 Is there a way to trigger a beep/alarm/sound when my breakpoint is hit? I'm using Visual Studio 2005/2008. 回答1: Windows XP Control Panel -> Sounds and Audio... -> Program Events - Microsoft Developer -> Breakpoint Hit Windows 7 Control Panel -> All Control Panel Items -> Sounds -> Sounds (tab) - Microsoft Visual Studio -> Breakpoint Hit 回答2: Yes, you can do it with a Macro assigned to a breakpoint. This works in VS 2005, I assume 2008 will work as well. I assume you don't want a sound on

问题 Today I ran into a problem were I needed to remote-debug a program. The program was launched from another system, so I really don't have an opportunity to interact with it on the command line. I could change its source easily though. What I needed to happen was for the program to start normally, and then wait for me to attach to it with a debugger. I couldn't come up with a way to do it that made me happy. I did find the bug, but without the help of the debugger. while(true) { } Kept the

问题 Where can I find statistics on mobile and desktop screen sizes? Im making a responsive site and specifically what im trying to find out is weather their is a size gap between the majority of phones and desktop and tablet users where I can put a breakpoint. I think that there should be but know I should test my assumptions. So just to be clear, I want phones to have one set of styles, and tablets and desktops to have another set. Thanks 回答1: I just finished doing a responsive business website

问题 I am having a hard time debugging my C# app in Visual Studio. I can't figure out how to debug code line by line, but not at the moment the program starts (because I would have to F5 a lot of times as the program takes about 200 lines just to initialize). I mean let's assume I would like the debugging to start in a certain moment. Something like having a breakpoint in every line of code but without actually creating the breakpoints (which would take a lot of time every time I want them to be

问题 If I have two threads running concurrently in my program and put a breakpoint on one of them, will the other thread stop also halt when this breakpoint is hit, or will it continue executing regardless? (I am writing in Java and using NetBeans) 回答1: Breakpoints have an option how they should behave: to suspend a single thread or all threads 回答2: I believe that each thread will stop once it hits the breakpoint in the code, while other threads will continue to run. I remember this from my Tomcat