There is a bug in your code, but you need to do something so that the bug's effects cannot be masked by other actions of the program. asked 5 years ago viewed 16203 times active 5 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Related 1127C++11 introduced a standardized memory model. Reply With Quote 26th January 2008,16:43 #16 wysota View Profile View Forum Posts View Blog Entries Visit Homepage View Articles The "Q" Join Date Jan 2006 Location Warsaw, Poland Posts 33,213 GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. http://amigasuperbit.com/cannot-access/qt-cannot-access-memory-at-address.html
Reply With Quote 26th January 2008,19:30 #19 defumar View Profile View Forum Posts View Blog Entries View Articles Novice Join Date Jan 2008 Posts 21 Thanks 3 Re: Cannot access memory Otherwise (gdb) break main ... (gdb) r ... If this is your case, define these variables as static inside the function or as global variables. I think your gdb is invalid. http://community.qnx.com/sf/go/post63364
Does it mean that the address is not reachable (hardware problem) or that the memory content is corrupted/not the one expected... ? I did not try it with electric fence. We recommend upgrading to the latest Safari, Google Chrome, or Firefox. Why do these techniques help?
gdb: The GNU debugger. The time now is 14:00. The cause in this case turned out to be a dependency library that my build (FFmpeg) was using by linking against (libgme in this case) which is exporting a few errant Note that I'm only interested here in memory errors that trash part of the heap.
Reply With Quote 26th January 2008,11:44 #13 defumar View Profile View Forum Posts View Blog Entries View Articles Novice Join Date Jan 2008 Posts 21 Thanks 3 Re: Cannot access memory So there is no error in your program. How do I avoid referring to all state variables when updating only a few? http://www.alteraforum.com/forum/showthread.php?t=28195 But of course you can use any implementation, and the debug versions can simply be wrappers around the real malloc.
Before trying to use a bigger memory (4Mbyte instead of 2) or deeply modify my code (no recursive call inside), I would like to have more informations about these errors. Report Inappropriate Content Message 1 of 7 (2,055 Views) Reply 0 Likes Zmey Developer Posts: 1,524 Registered: 12-18-2012 My Device: Z30, Z10 LE, DevAlpha C, PlayBook Re: Debugging QML code Options Most of the variable are global. To compile with the debug features described, set the preprocessor variables DEBUG and DEBUG_HEAP.
Reply With Quote 25th January 2008,16:35 #5 defumar View Profile View Forum Posts View Blog Entries View Articles Novice Join Date Jan 2008 Posts 21 Thanks 3 Re: Cannot access memory http://www.qtcentre.org/threads/11513-Cannot-access-memory-at-address-0x0 Are you sure that's really the program you compiled? Cannot Access Memory At Address 0x0 Gdb It will show you where the stack and heap are stored, as well as where the libraries are loaded. Cannot Access Memory At Address Gdb share|improve this answer edited Apr 1 '11 at 23:30 answered Apr 1 '11 at 23:25 Josh Haberman 2,7181229 add a comment| up vote 0 down vote Check that neither orig, nor
My code ran fine "Normally " no debuggin untill i included some entra code an now hangs during load and need to trace where/ why ....... check my blog Go to Solution. There is NO WARRANTY, to the extent permitted by law. Reply With Quote 29-May-2009,09:51 #5 roberto60 View Profile View Forum Posts View Blog Entries View Articles Explorer Penguin Join Date Jul 2008 Posts 232 Re: argc=Cannot access memory at address 0x0 Error Reading Variable Cannot Access Memory At Address
The time now is 05:02 AM. Home Forum New Posts FAQ Calendar Community Groups Forum Actions Mark Forums Read Quick Links Today's Posts View Site Leaders Forum Rules Marketplace Shared Material FAQ About Us Register Chinese Forum You may have to register before you can post: click the register link above to proceed. http://amigasuperbit.com/cannot-access/php-core-dump-cannot-access-memory-at-address.html Reply With Quote 26th January 2008,11:27 #11 defumar View Profile View Forum Posts View Blog Entries View Articles Novice Join Date Jan 2008 Posts 21 Thanks 3 Re: Cannot access memory
Teenage daughter refusing to go to school Using DSolve with a boundary condition at -Infinity How does Gandalf end up on the roof of Isengard? I have no idea of where to find it in my KDevelop though. Memory leaks I usually debug memory leaks by printing statistics about calls to malloc and free before and after certain sections of code.
I tried debugging one of the examples which also gave me the "argc=Cannot access memory at address 0x0". I am very thankful to anyone would expalin this behaviour or hint for documentation. Watchdog has expired. The stackPointer is at @0x23FFFCC (@2200000 <= addr <[email protected]).
These addresses are not contiguous, and are different each time (more often at the end of memory). For example, if you enter artf2345 the application will jump directly to an artifact with the ID artf2345. Why is looping over find's output bad practice? have a peek at these guys Is it normal that the address of "argc" is changed after the call to init()?
Then, if the program continues to use the memory the mistake will become clear, especially if it tries to interpret the values it finds as pointers (they'll segfault). Stack overflow can be due to one of these: - recursive calls (but you say you don't use them) - a lot of nested calls - big local variables, like arrays So the method illustrated in the answer is safer. –Neil May 26 '09 at 21:38 This fixed some weird issues I was having; thanks. –Qix Jul 18 '14 at This is your resource to discuss support topics with your peers, and learn from each other.
My thought is possibly an ld bug [?] share|improve this answer edited Aug 26 '15 at 22:28 answered Aug 26 '15 at 18:10 rogerdpack 22.8k1393143 add a comment| Your Answer That is, if memory is not re-used, then it no longer matters in what order the relevant blocks are allocated and deallocated. Are there other debuggers I could try? Thus, we break spatial dependencies involving the bug.
I can't explain why Valgrind isn't catching it though: usually Valgrind uses the same stack size as the OS (at least on my system). Thanks for answers. You can try loading a simple application which runs in internal memory and extensively test external memories data transfers. Can be caused by 32/64 bit mixups.