Search DaniWeb - valgrind

Valgrind 14 Years Ago by ranvi Hi All, I need your help regarding valgrind issues. I have pasted a snippet of code, (not compilable … at the end, kills the child. But I am getting valgrind error as possible memory leak. I am not able to… figure out the cause. Though valgrind complains the problem is coming from the Msg class, it… valgrind report memory leak when assign a value to a string 15 Years Ago by earlati2 … this simple code to test an memory leak reported by valgrind. [CODE=cpp] /****************************************** * FILE: t3.c *… ? Regards, Enzo [CODE] [enzo@P0101222 C]$ valgrind --leak-check=full ./t3 ==3910== Memcheck, a …GPL'd, by OpenWorks LLP. ==3910== Using valgrind-3.2.3, a dynamic binary instrumentation framework… valgrind error : blocks are possibly lost in loss record 15 Years Ago by liveshell … have following peace of code, when i check it with valgrind it gives me "537 bytes in 19 blocks are…;; m_mRespTags[eSetStateRes] = "SetStateRes"; return true; }[/CODE] and the valgrind reports : [CODE=text]==3152== 537 bytes in 19 blocks are… Re: valgrind error : blocks are possibly lost in loss record 15 Years Ago by Salem …"; return true; } int main ( ) { CManager foo; } $ g++ foo.cpp $ valgrind ./a.out ==3471== Memcheck, a memory error detector. ==3471== Copyright…-2008, and GNU GPL'd, by OpenWorks LLP. ==3471== Using valgrind-3.4.1-Debian, a dynamic binary instrumentation framework. ==3471… Valgrind strcmp error 14 Years Ago by yuri1969 Hi, I have been struggling with Valgrind's error in this function: [CODE]void parse_date(char *date_out) { … */ strcpy(date_out + 6, date_in + 7); free(str_month); free(str_day); }[/CODE] Valgrind's msg is twice: [CODE]==8664== Conditional jump or move… Re: valgrind error : blocks are possibly lost in loss record 15 Years Ago by mitrmkar [QUOTE=liveshell;1148334]So is there any memory leak in bool CManager::GenerateResponseTagMap() ??[/QUOTE] It looks like a perfectly valid way of doing what you are doing there. However, you may be leaking [ICODE]CManager[/ICODE] object(s). So, how are you allocating those objects, also are you using [I]static[/I] [ICODE]CManager[/ICODE] … Re: Valgrind strcmp error 14 Years Ago by mitrmkar >> How should I initiate the str_month, I thought that line #12 initiation is sufficient [URL="http://www.cplusplus.com/reference/clibrary/cstring/strncpy/"]strncpy()[/URL] does not necessarily NULL-terminate the string -- so, you might do e.g. .. [code] str_month[3] = '\0'; [/code] Re: Valgrind strcmp error 14 Years Ago by yuri1969 [QUOTE=mitrmkar;1378120] [URL="http://www.cplusplus.com/reference/clibrary/cstring/strncpy/"]strncpy()[/URL] does not necessarily NULL-terminate the string -- so, you might do e.g. .. [code] str_month[3] = '\0'; [/code][/QUOTE] I didn't know about this strncpy() feature; Thank you! Re: cant clean up memory? 15 Years Ago by Salem > valgrind complains at line 151 the strdup. But I don't know where I should deallocate. In whoever calls get_lex(), just after they've finished with the tokens would be good. Re: Crazy Leak...plz help 17 Years Ago by vijayan121 … 0x3C03D2F3: operator new(unsigned) (in /usr/local/lib/valgrind/vgpreload_memcheck.so) ==1599== by 0x804936E: LeftistHeap::initializeHeap(std::…and never delete. change HOW_MANY_ELEMENTS to 1000 and valgrind will report 8000 bytes in 1000 blocks as…memory. you could verify this by using the valgrind switch --show-below-main=yes (continue stack … Segmentation fault - Binary Search tree 14 Years Ago by b1izzard …} } return 0; } [/CODE] I am newbie to Valgrind and got the following output when I run the program… [CODE] >>valgrind --tool=memcheck --leak-check=yes ./key ---------BINARY SEARCH…malloc'd or (recently) free'd ==13171== valgrind: m_mallocfree.c:225 (mk_plain_bszB): Assertion 'bszB != 0' … Re: Crazy Leak...plz help 17 Years Ago by n.aggel …QUOTE=vijayan121;429982] change HOW_MANY_ELEMENTS to 1000 and valgrind will report 8000 bytes in 1000 blocks as …set the size to 10 [QUOTE=vijayan121;429982] valgrind automagically knows about memory that is still reachable.… delete where the queue elements point and logically valgrind reports [inlinecode]Invalid read of size 4[/inlinecode… Re: Crazy Leak...plz help 17 Years Ago by vijayan121 … before...what does it mean? this is what the valgrind manual says: Warning: set address range perms: large …;number> Diagnostic message, mostly for benefit of the Valgrind developers, to do with memory permissions. for a user,… top to look at process memory usage and then valgrind.massif to profile the heap (checked fragmentation). once i… Re: Crazy Leak...plz help 17 Years Ago by vijayan121 … heap. this is an extract of the valgrind output. [code]>valgrind --leak-check=yes -v --show-reachable=yes…1 ==19458== at 0x3C03D183: malloc (in /usr/local/lib/valgrind/vgpreload_memcheck.so) ==19458== by 0x3C20B099: __smakebuf (in /lib… with the suggested modifications along with the complete valgrind output. you could have a look at it… Re: Proper grasp of arrays in memory 10 Years Ago by mike_2000_17 … in some dubious way, then just run your program in valgrind (it helps if you make sure to compile with debugging… option `-g` for GCC / MinGW). If there is anything wrong, valgrind will most probably catch it. And after all, what's… that could happen? The worst that could happen is that valgrind gives you a report that you don't understand, and… Re: Crazy Leak...plz help 17 Years Ago by n.aggel … a core dumped error... If i run the application with valgrind i get the following warnings:: [CODE]==6837== Warning: set … i haven't managed to finish a whole run of valgrind... I also tried to compile with the -Wall option …get any problem, and everything works like it should, also valgrind reports that i don't have any memory leak... Why… Crazy Leak...plz help 17 Years Ago by n.aggel …!}... the problem is that when i profile the code with valgrind, it shows that i have a memory leak.... i can… with the makefile i used to test the structure with valgrind thank you in advance for your time... Re: Crazy Leak...plz help 17 Years Ago by n.aggel …... [QUOTE=vijayan121;429535]check the function [inlinecode]LeftistHeap::initializeHeap[/inlinecode]. valgrind is reporting 80 bytes in 10 unreachable blocks of memory…(5); return 0; } [/CODE] if i test this programm with valgrind, i don't get any errors.... which is weird because… Re: Crazy Leak...plz help 17 Years Ago by n.aggel … get any problem, and everything works like it should, also valgrind reports that i don't have any memory leak... Why…...but still..... Also to learn how to use gdb or valgrind{these are the tools you use for this job right… memory leak on passing string parameters to constructors? 17 Years Ago by kux … when compiling with gcc and running with valgrind i have a memory leak the valgrind output regarding the leak is: ==12855== 17… Help with very simple memory leak 16 Years Ago by cppStudent … leak return 0; }[/CODE] here is part of the valgrind output [CODE=valgrind]==27479== 29 (12 direct, 17 indirect) bytes in 1… cant clean up memory? 15 Years Ago by monkey_king …'t nail down a memoryleak that shows up when using valgrind. A sample file: small.txt would be [CODE] 1 6… huge but the problemeatic functions are get_lex, readmatrix and friends. valgrind complains at line 151 the strdup. But I don't… Which memory leak detection tool do you recommend for embedded linux ? 15 Years Ago by ithelp Hi, Popular memory leak detection tool like valgrind ,etc is simply crashing in our customized linux environment (montavista hardhat ,etc) , is there any other good memory leak detection tool which can be used on the target but which does not consume so much RAM like valgrind ? Re: Which memory leak detection tool do you recommend for embedded linux ? 15 Years Ago by JasonHippy …] [url]http://www.linuxjournal.com/article/6556[/url] Other than Valgrind, it lists several tools/libraries..... [B][U]For programs compiled… C++ programs:[/U][/B] dmalloc ccmalloc NJAMD YAMD mpatrol Insure++ Valgrind seems to work fine for me (EDIT: But then I… Re: Ncurses memory leak problem 14 Years Ago by hohoho89 … I could at least copy n paste the result in valgrind first then the little pseudocode in C. ==24810== HEAP… application types ctrl-c I'm quite uncertain where the valgrind mention the memory leaks, but everytime I turn initscr()… with which to answer this question. > Where does valgrind say the leak is? Your code, within the ncurses library… Re: Crazy Leak...plz help 17 Years Ago by vijayan121 check the function [inlinecode]LeftistHeap::initializeHeap[/inlinecode]. valgrind is reporting 80 bytes in 10 unreachable blocks of memory allocated in this function. this is a leak. the 2 reachable blocks are not memory allocated from your code (they are allocations by libc.so and will be released on program exit) and do not constitute a leak. Re: Crazy Leak...plz help 17 Years Ago by n.aggel … of the entire heap. this is an extract of the valgrind output. [/QUOTE] once again [B]my mistake[/B]!, i 've… Re: Crazy Leak...plz help 17 Years Ago by vijayan121 … get any problem, and everything works like it should, also valgrind reports that i don't have any memory leak... Why… Re: Crazy Leak...plz help 17 Years Ago by n.aggel PS:: the output of valgrind i posted before...what does it mean? Re: Crazy Leak...plz help 17 Years Ago by n.aggel …:: [code=makefile] # Project: PQ #Add -g option to use with valgrind and with gdb! CC = g++ CFLAGS = -Wall -std=c++98…