valgrind Questions

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Are there any known false positives with Valgrind? I get a 'Conditional jump or move depends on uninitialised value(s)' with the fmemopen function, writing in C and compiling with GCC. Can I be sur...
Satyr asked 28/4, 2009 at 7:19

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I run Valgrind with the following parameters: --leak-check=full --show-reachable=yes --leak-resolution=high --num-callers=100 --trace-children=yes In memory leaks log, I see some error messages ...
Austerity asked 28/6, 2012 at 10:36

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I'm working on code that runs on a raspberry pi 3. And got the following error on my logging classes. ==1297== Invalid read of size 8 ==1297== at 0x4865D1C: ??? (in /usr/lib/arm-linux-gnueabihf/li...
Selfmade asked 11/9, 2018 at 6:43

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From reading about the valgrind memory leak report of "possibly lost", I had understood that there is a very small chance that this kind of report will be a false-positive report. What I could not ...
Zebulun asked 13/7, 2013 at 14:4

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Valgrind/Memcheck can be intensive and causes runtime performance to drop significantly. I need a way (at runtime) to detect it in order to disable all auxiliary services and features in order to p...
Lisabethlisan asked 10/4, 2019 at 13:38

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I am running Ubuntu 12.04 and installed Valgrind configure and installed it. Everytime i run valgrind ./ file I always get permission denied even under root.
Euphuism asked 18/9, 2014 at 7:27

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When attempting to use getopt multiple times, the error I get in valgrind is Invalid read of size 1. The error only occurs when doing something like this: ls -a -b ls -a -b Therefore I'm assumin...
Gerhan asked 12/11, 2013 at 21:18

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I have a stripped binary and symbol-file. Is it possible to add the symbols back to binary and create an unstripped binary. My use-case is using this binary w/ valgrind.
Akene asked 12/4, 2013 at 18:1

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I am looking to log all accesses to addresses in a block allocated in heap, pointed by a given pointer. In the following example, it would be monitoring all accesses to 1024 bytes from p. #define B...
Tenure asked 6/9, 2023 at 22:10

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I have the following code: #include <iostream> #include <random> int main() { std::mt19937_64 rng(std::random_device{}()); std::cout << std::uniform_int_distribution<>(0...
Stabilizer asked 4/5, 2016 at 15:40

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I have a code which works perfect in serial but with mpirun -n 2 ./out it gives the following error: ./out': malloc(): smallbin double linked list corrupted: 0x00000000024aa090 I tried to use va...
Sectarian asked 18/1, 2016 at 9:48

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I have installed valgrind with no problems but when running it I keep getting the following error: valgrind: failed to start tool 'memcheck' for platform 'amd64-linux': No such file or directory I...
Mohl asked 12/11, 2020 at 23:11

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[This is lengthy and full of details. My specific questions are introduced by the boldface word Question below.] Summary We are running some of our test suites under valgrind and encountering an ...
Matted asked 16/3, 2017 at 16:24

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I've been trying to debug a segmentation fault recently using valgrind on my raspberry Pi (model b), running Debian GNU/Linux7.0 (wheezy). Every time I run valgrind on a compiled C++ program, I get...
Flemings asked 2/7, 2013 at 16:21

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I have seen some of the post regarding valgrind but not single post helped me in understanding interpretation of valgrind output. I ran two programs with valgrind (Both having memory leaks) Sampl...
Margheritamargi asked 1/7, 2013 at 6:48

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This is my code: #include<stdio.h> #include<stdlib.h> #include<string.h> void main(int arge, char *argv[]) { FILE *f1; char ch,*fn="~/lyrics/"; strcat(fn,argv[1]); strcat(fn...
Uda asked 16/12, 2012 at 12:18

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This is a minimal working example for the problem I am facing in my real code. #include <iostream> namespace Test1 { static const std::string MSG1="Something really big message&q...

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I'm trying to use valgrind to check memory leaks in C. I'm using Windows and I installed MinGW. When I try valgrind ./list, it returns an error telling "valgrind: The term 'valgrind is not re...
Insubstantial asked 25/2, 2023 at 17:12

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I'm having troubles installing Valgrind on the macOS Ventura (13.0) through the Homebrew. In the terminal I have tried following. $ brew install valgrind After Homebrew's autoupdate, I got the fol...
Silo asked 28/10, 2022 at 20:37

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I am trying to run a program on Valgrind. But I am getting this error: valgrind: mmap(0x67d000, 1978638336) failed in UME with error 22 (Invalid argument). valgrind: this can be caused by executab...
Sporulate asked 8/2, 2017 at 22:17

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I have a large application that I am checking for memory leaks. I am using valgrind with the options --leak-check=yes --track-origins=yes. A sample of the warning: ==2173== Warning: noted but unha...
Streamway asked 17/12, 2019 at 1:24

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I have a fairly robust CI test for a C++ library, these tests (around 50) run over the same docker image but in different machines. In one machine ("A") all the memcheck (valgrind) tests ...
Expeditious asked 31/1, 2023 at 3:22

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I tried to install Valgrind with brew install Valgrind and got : valgrind: This formula either does not compile or function as expected on macOS versions newer than Sierra due to an upstream incomp...
Swingletree asked 10/10, 2018 at 3:9

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First, I know similar questions have been asked. However, I'd like to have a more general simple question with really primitive C data types. So here it is. In main.c I call a function to populate...
Gavial asked 24/12, 2014 at 11:36

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When I call this function: int within(struct key *node, int *value) { int length = len(node); if ((value <= node[length-1].data) && (value >= node[0].data)) // Problematic line ...
Rickie asked 21/5, 2014 at 18:45

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