Error From Debugger Cannot Access Memory At Address 0x0
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If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link cannot access memory at address 0x0 eclipse above to proceed. To start viewing messages, select the forum that you want gdb cannot access memory at address breakpoint to visit from the selection below. Welcome to Qt Centre. Qt Centre is a community site devoted to programming in cannot access memory at address gdb core C++ using the Qt framework. Over 90 percent of questions asked here gets answered. If you are looking for information about Qt related issue — register and post your question. You are currently viewing
Cannot Access Memory At Address 0x8
our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today! If you have any problems with the hex to decimal registration process or your account login, please contact us. + Reply to Thread Page 1 of 2 12 Last Jump to page: Results 1 to 20 of 30 Thread: Cannot access memory at address 0x0 Thread Tools Show Printable Version Subscribe to this Thread… Search Thread Advanced Search Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 25th January 2008,13:15 #1 defumar View Profile View Forum Posts View Blog Entries View Articles Novice Join Date Jan 2008 Posts 21 Thanks 3 Cannot access memory at address 0x0 Hi, it's me, again (sigh), I'm unsure whether I should post this on the KDevelop forum, the gdb one or qtcentre, so I'll start with the most specific one. I'm new to working with KDevelop. Yeah, I guess I should read some docs about it. (I normally work with MSVS) Here's the problem I'm having: I keep getting the following error when trying to debug: Cannot access memory at address 0x0. I've cut down my code and pinned down the problem to be at line 5, yet I'm still puzzled as of why it happens, I can't see what I'm doing wrong here. (naturally, it compiles just fine) Right, so her
Sample gdb sessions Keyboard shortcuts in gdb Setting conditional breakpoints and breakpoints in C++ invoking make in gdb Advanced features attaching to an already running process, debugging a child process after a fork, signal handling Links to more gdb information Some settings (and bug fixes) for ddd Introduction to gdb and ddd The purpose of a debugger is to allow you to see what is going on inside your C program while it runs. In addition, you can use gdb to see what your program was doing at the moment it crashed. Here are some http://www.qtcentre.org/threads/11513-Cannot-access-memory-at-address-0x0 of the usful actions that gdb can perform: Start your program and step through it line by line Make your program stop on specified conditions Show the values of variables used by your program Examine the contents of any frame on the call stack Set breakpoints that will stop your program when it reaches a certain point. Then you can step through part of the execution using step https://www.cs.swarthmore.edu/~newhall/unixhelp/howto_gdb.html and next, and type continue to resume regular execution. For C and C++ programs, gdb and ddd are debuggers that you can use. ddd is a easy-to-use GUI wrapper around an inferior debugger (gdb for GNU compiled C or C++ code). ddd allows you to interact with the debugger by using either GUI menu options or the under-lying debugger's command line interface. In addition, ddd automatically displays source code when breakpoints are reached. There are some example programs and some documentation on using gdb to debug them that you can copy from here: /home/newhall/public/gdb_examples/ Getting started with gdb C and C++ programs compiled with the GNU compiler and the -g option can be debugged using GNU's debugger gdb (actually, you can use gdb on code that is not compiled with -g, but unless you like trying to figure out how assembly code sequences map to your source code I wouldn't recommend doing so). Also, do not compile with an optimization flag (i.e. don't use -O2), or gdb will have a hard time mapping optimized machine code to your source code. For example: % gcc -g myprog.c To start gdb, invoke gdb on the executable file. For example: % gdb a.ou
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings http://stackoverflow.com/questions/5519824/cannot-access-memory-at-address-error and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation https://forums.opensuse.org/showthread.php/415438-argc-Cannot-access-memory-at-address-0x0 Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it cannot access only takes a minute: Sign up Cannot access memory at address error up vote 4 down vote favorite 3 I'm getting this error: Program received signal SIGSEGV, Segmentation fault. 0x0000000000407265 in Quadtree::deeper (this=0x7fffffffe430, orig=@0x7fffffffe430, n=@0x7a1da0, tol=Cannot access memory at address 0x7fffff3feffc ) at quadtree.cpp:47 47 int Quadtree::deeper(QuadtreeNode * & orig, QuadtreeNode * & n, int tol, int tolNum) { This cannot access memory is line 47: int Quadtree::deeper(QuadtreeNode * & orig, QuadtreeNode * & n, int tol, int tolNum) { Whats weird is that I am not getting any valgrind errors at all, but only gdb error and seg fault at run time. What can this error possibly mean in a general sense (without having to see the rest of my code)? c++ share|improve this question asked Apr 1 '11 at 23:12 moby 12.3k27116226 I doubt anyone can help you without some more information. –GWW Apr 1 '11 at 23:14 But what does this error mean? –moby Apr 1 '11 at 23:14 @bitmoe: dangling pointer or stack overflow e.g. –Erik Apr 1 '11 at 23:15 1 means you have a bad pointer or object reference.... –Keith Nicholas Apr 1 '11 at 23:16 it looks possibly like you passed a negative number as a pointer /reference somewhere –Keith Nicholas Apr 1 '11 at 23:19 | show 1 more comment 2 Answers 2 active oldest votes up vote 10 down vote accepted My best guess:
Development Programming/Scripting argc=Cannot access memory at address 0x0 Welcome! If this is your first visit, be sure to check out the FAQ. You will have to register before you can post in the forums. (Be aware the forums do not accept user names with a dash "-") Also, logging in lets you avoid the CAPTCHA verification when searching . Select Articles, Forum, or Blog. Posting in the Forums implies acceptance of the Terms and Conditions. Page 1 of 3 123 Last Jump to page: Results 1 to 10 of 26 Thread: argc=Cannot access memory at address 0x0 Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 29-May-2009,02:00 #1 roberto60 View Profile View Forum Posts View Blog Entries View Articles Explorer Penguin Join Date Jul 2008 Posts 232 argc=Cannot access memory at address 0x0 Hi I'm a self-trained C programmer getting in trouble finding a segmentation fault error. Debugging the program all seems coherent except the stack messages (i'm using gdb): Code: main (argc=Cannot access memory at address 0x0) to test this I wrote the following program: Code: #include