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Argc= Error Reading Variable


execute n (next) 6. Use the -dograb option to enforce grabbing. 7 return 0; (gdb) bt #0 main (argc=Cannot access memory at address 0x0 ) at main.cpp:7 (gdb) p argc Cannot access memory at address Program exited normally. (gdb) q To copy to clipboard, switch view to plain text mode backtrace after executing line 5 (evil line, ain't it) returns the same as before (argc=Cannot access On the other hand, here's what we get at the assembly level: (gdb) p $pc $1 = (void (*)(void)) 0x80484c9 (gdb) disass $pc Dump of assembler code for function main: weblink

Type "show copying" and "show warranty" for details. If it happens at the end of a long chain, you may be overflowing the stack, which would be an indication that the binary search algorithm was incorrect. –simonc Jan 23 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. I think you have over 100 Mbytes of static arrays being created (4*720000 = 2.88 million cells * 8 bytes per cell for a double(?) would be 23 Mbytes per array,

Argc= Error Reading Variable

Is this your problem also ? Then "gdb main", "break main" and run to the breakpoint. "p argc" or "p argv" gives the error. philstewart View Public Profile Find all posts by philstewart #4 9th February 2008, 08:50 PM Margrad Offline Registered User Join Date: Apr 2007 Location: Portugal Posts: 29 try Namely, when disassembling main function in gdb, it pointed exact assembly instruction that caused the segmentation fault, and it turned out to be the instruction that accessed stack after the stack's

Join Us! it cries about needing a temp variable in the initialization phase. The Green Hills debugger does that and I think the compiler stores things in the debug info for this to work, however heuristic scripting can do quite well given just a The file appears to open ok, but there must be something on the fprintf line that's wrong!

when the program stops at the "break main" you can't see them, but after a "next" you can. Cannot Access Memory At Address 0x0 Gdb Do examples bundles with Qt build and run correctly? Click Here to receive this Complete Guide absolutely free. http://stackoverflow.com/questions/19954086/getting-cannot-access-memory-at-address-error Few do and the scarcity makes them very dear to me.) class Application { public: Application(const char* profile); void mainLoop(); private: static const int MAX_BUF_SIZE = 1024; static const int MAX_PROF

This is the full top of my code, have I made an error? Why are password boxes always blanked out when other sensitive data isn't? I was getting the same error in a legacy C code and I never considered it to be a stack overflow. Reply With Quote 25th January 2008,16:01 #2 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

Cannot Access Memory At Address 0x0 Gdb

on 10.27.09 at 9:36 am I'm Sherlock. http://sgros.blogspot.com/2012/09/segmentation-fault-in-header-of-main.html I compiled using your command. Argc= Error Reading Variable People who want backtraces with -fomit-frame-pointer are still stuck, though. #3 sn on 09.04.09 at 10:59 pm Doesn't your main function need to return a value at the end? #4 Yossi Error Reading Variable Cannot Access Memory At Address 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.

normal? The assignment seems mostly irrelevant, but it's a fairly basic I/O exercises. Jan 23 '13 at 17:53 add a comment| up vote 0 down vote In your recursive function, I can't see any terminaison case if there is no matching element. A better future (a programmer's first animated post) Sorry for having published a draft A better future Things from Python I'd miss in Go How to make a heap profiler Why

It only applies to main; other functions show their parameters, even if they're not used in the body. As you'd expect with a Segmentation fault or a Bus error core dump, this points to an instruction accessing memory, specifically, the stack. Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1". (gdb) break main Breakpoint 1 at 0x8048596: file main.cpp, line 5. (gdb) run Starting program: /home/defumar/MToDo/src/src [Thread debugging using libthread_db enabled] [New Thread -1224476992 (LWP 6527)] The trouble with C++ debuggers is that they routinely print so much garbage due to memory corruption, debug information inadequacy and plain stupidity that their users are accustomed to automatically ignore

Contact Us - Advertising Info - Rules - LQ Merchandise - Donations - Contributing Member - LQ Sitemap - Main Menu Linux Forum Android Forum Chrome OS Forum Search LQ 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 In C, "encapsulation" generally means ADTs - forward-declared structs implemented in a .c file, hiding their internals to the point where you can't allocate an object yourself since you don't know

Segmentation fault in the header of a main functio...

As to other languages - most allocate less on the stack and report stack overflows more gracefully. #40 José Pedro on 05.25.12 at 11:56 am Hi've got an easy solution for iptables not dropping by IP and port? Ah! You need to think through how the recursion will work for different inputs, including invalid ones.

This is the version I used for gdb Code: GNU gdb 6.8 Copyright (C) 2008 Free Software Foundation, Inc. This is free software; see the source for copying conditions. You are trying to put too much on the stack. Wednesday, September 26, 2012 Segmentation fault in the header of a main function...

The time now is 10:56 PM. If you use argc/argv, then their values are reports as normal. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping Comment 9 Jan Kratochvil 2008-10-13 11:02:51 EDT It is fixed in the current upstream snapshot: GNU C (GCC) version 4.4.0 20081007 However, in C++ it will crash near the beginning of a function long before the offending local variable is even declared, in an attempt to push the frame pointer or some

The error is probably in the way you link for electric fence. The problem is that their is not a fast effective way of detecting such problems unless your experienced with assembly and the technical details of the envrioment the application is running execute another bt and see the messed up output which includes "cannot access memeory at 0x0". They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

Biseri naših neukih novinara 6... Is there a name for the (anti- ) pattern of passing parameters that will only be used several levels deep in the call chain? And with the first-rate experience being the living hell that it is, few would willingly opt for a second-rate option. I'll try starting a new project and copy pasting it in but this is really weird.

Is my installation of opensuse 11.0 broken? You'd be better off if you didn't strip non-alphanumeric characters before parsing natural language. #27 Chris on 06.30.10 at 1:57 pm Note: In Fedora limit doesn't exist, I used this to Cannot access memory at address 0x0 This is with SUSE 10.1, which is gcc 4.1.0. Program exited normally.

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