valgrind

问题 I'm corrupting memory somehow because my program crashes without error at random places. I'm using valgrind with --leak-check=full , compiling with -O0 -g , and the very first problem it detects is the first line in int main() cout << "reading file" << endl; with ==5089== Warning: client switching stacks? SP change: 0x7ff0004f8 --> 0x7feb7de10 ==5089== to suppress, use: --max-stackframe=4728552 or greater ==5089== Invalid write of size 8 ==5089== at 0x41E107: main (Dgn.cpp:2833) ==5089==

问题 This question already has answers here : Facing an error “*** glibc detected *** free(): invalid next size (fast)” (2 answers) Closed 5 years ago . The code below breaks on the fclose() call. void output_gauss_transform(char* filename, char* mode, double** T, double shift, int len) { FILE* fp; printf("Outputting gauss transform to %s.\n", filename); if ((fp = fopen(filename, mode)) == NULL){ perror("Could not open file"); return; } int i; for (i = 0; i < len; ++i) { fprintf(fp, "%lf %lf\n", T

问题 Do you think that running set of automatic tests based on valgrind's tool suite makes sense? Did you hear about or see such setup in action? What automatic (free from human intuition) actions could such setup perform? 回答1: This would make sense if you were checking for memory problems / bad code as part of unit testing or final build testing. There may be two approaches: writing a test tool that will use valgrind's API through its library, pretty much creating a custom front-end replacing the

问题 With Linux/GCC/C++, I'd like to record something to stderr whenever malloc/free/new/delete are called. I'm trying to understand a library's memory allocations, and so I'd like to generate this output while I'm running unit tests. I use valgrind for mem leak detection, but I can't find an option to make it just log allocations. Any ideas? I'm looking for the simplest possible solution. Recompiling the library is not an option. 回答1: malloc_hook(3) allows you to globally interpose your own

问题 Having problems running iOS 4.2 apps with valgrind. I installed valgrind 3.6.0-SVN from Macports. XCode 3.2.5. When I modify my main() to run valgrind I get the following output: Detected an attempt to call a symbol in system libraries that is not present on the iPhone: open$UNIX2003 called from function _vgrZU_libSystemZdZaZddylib_arc4random in image vgpreload_core-x86-darwin.so. If you are encountering this problem running a simulator binary within gdb, make sure you 'set start-with-shell

问题 I've installed valgrind for android and I can confirm it is working as I tried running ls with it, and it works fine. But how do I execute an android app with a native component I would like to debug? I looked at this question: How to start an android app with valgrind but I have no idea how to follow it. How do you wrap an app in a shell script? What is "wrap." followed by the package name supposed to be? I tried doing this with com.matthewmitchell.wakeifyplus being my application package:

问题 I am on Mac OS X using codeblocks 10.05 I downloaded Valgrind, and extracted a folder. I am completely lost from there, and have no idea how to build it. I do not know ANY terminal/console commands and am generally new to programming, so I have no idea how to "build" or "compile" it. I just have a folder called Valgrind with a bunch of random files in it. Could someone please tell me how to proceed? I already checked the website/documentation but it didn't really give me installation

问题 I think I have a kind really bad concepts problems. Why I simple get a lot of race conditions error with valgrind. First i thought that could be a bug, and I saw in forums that an updated rolling release of linux will solve this... so now i have opensuse tubleweed, 100% updated. The following code muss have something very wrong: #include <iostream> #include <thread> using namespace std; class FOO { public: void do_something () { cout<<"cout somethin\n"; } }; int main () { FOO foo; std::thread

问题 While working with Valgrind tool, i need to log the details produced by valgrind tool. How can I accomplish that? I tried something like, valgrind a.out | test and valgrind a.out > test It gave just the program's output and not the valgrind memory error,leak information. Even i am getting like this if the program requires no user interaction (i.e. giving input). If the program need user input even that thing itself won't work. How can I do this? 回答1: valgrind --log-file="filename" 回答2: By

问题 I need some help with char* initialization and strstr in C. This is the general issue: I have a function func1 func1() func2(); The issue is that valgrind gives an error basically saying that strstr might be using an uninitialized value. To rectify this, I'd have to do something like char* str = "hello world"; , but then I can't realloc , which is an issue. I have tested my program with random strings and the issue is the fact that valgrind is treating str as uninitialized, but I just don't