valgrind | Unofficial mirror of git : //sourceware.org/git/valgrind.git

by tklengyel C Version: Current License: GPL-2.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | valgrind Summary

valgrind is a C library. valgrind has no bugs, it has a Strong Copyleft License and it has low support. However valgrind has 3 vulnerabilities. You can download it from GitHub.

Release notes for Valgrind.

Support

Quality

Security

License

Reuse

Support

valgrind has a low active ecosystem.

It has 33 star(s) with 9 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 1 have been closed. On average issues are closed in 14 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of valgrind is current.

Quality

valgrind has no bugs reported.

Security

valgrind has 3 vulnerability issues reported (0 critical, 2 high, 1 medium, 0 low).

License

valgrind is licensed under the GPL-2.0 License. This license is Strong Copyleft.

Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

Reuse

valgrind releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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valgrind Key Features

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valgrind Examples and Code Snippets

No Code Snippets are available at this moment for valgrind.

Community Discussions

Trending Discussions on valgrind

Question about at __strcmp_sse42 (vg_replace_strmem.c:852) In C

`bash` is leaking memory, where do I report it?

dynamic memory allocation segfault

Running valgrind on NVIDIA Jetson gives no leak source information

Conditional jump or move depends on uninitialised value(s) at strcpy

python -X showrefcount reporting negative reference counts for extension

valgrind reports "Operation not permitted" but permissions seem to be ok

Proper way to fill nested struct in C from file

"blocks are indirectly lost in loss record.." valgrind error - cpp

Allocate vs construct an array of ints using operator new and placement new

QUESTION

Question about at __strcmp_sse42 (vg_replace_strmem.c:852) In C

Asked 2021-Jun-16 at 01:27

May I have a question about my error during valgrind check?

I don't know how to fix this error below: at 0x4C2E2B1: __strcmp_sse42 (vg_replace_strmem.c:852)

...

ANSWER

Answered 2021-Jun-15 at 15:03

This occurs when the string doesn't a NULL terminated string. In this case, the value "-all" or argv[1] maybe doesn't a NULL terminated string, therefore the strlen will return an indeterminate value, because strcmp goes past the end of the strings and past the memory you allocated for them. Try add \0 in the end of the string before the strcmp.

Source https://stackoverflow.com/questions/67988420

QUESTION

`bash` is leaking memory, where do I report it?

Asked 2021-Jun-13 at 23:12

I have a super simple script to confirm this behavior:

leak.sh

...

ANSWER

Answered 2021-Jun-13 at 23:12

As mentioned by @oguz_ismail in the comments, bug-bash@gnu.org is the appropriate place to report the bug.

However, a certain format for the email is required/requested, when you need to report a bug.

All bug reports should include:

The version number of Bash.

The hardware and operating system.

The compiler used to compile Bash.

A description of the bug behaviour.

A short script or ‘recipe’ which exercises the bug and may be used to reproduce it.

You can find ALL the details at: https://www.gnu.org/software/bash/manual/html_node/Reporting-Bugs.html

Finally, there is a helper script built into bash itself. Call bashbug from the command line, and it will populate most of the requirements, leaving you to fill out the description and the steps required to reproduce the bug.

Source https://stackoverflow.com/questions/67949687

QUESTION

dynamic memory allocation segfault

Asked 2021-Jun-12 at 21:15

Why does my code segfault when using the dynamic memory allocation in the code below ?Any pointers on what maybe happening? , im using valgrind and it points to the second loop being the issue .

...

ANSWER

Answered 2021-May-24 at 10:23

Syntax? b[y][x] = 0 and not b[i][j] = 0 ?

b[y][x] is out of range.

while b[y-1][x-1] is the last matrix index.

Source https://stackoverflow.com/questions/67670028

QUESTION

Running valgrind on NVIDIA Jetson gives no leak source information

Asked 2021-Jun-11 at 19:12

tl;dr

valgrind not showing reachable memory leak source

details

C++ application was built using cmake with following extra options:

...

ANSWER

Answered 2021-Jun-11 at 14:51

In case of problems with valgrind, it is always recommended to try with a recent version, either the last release or the git version.

Note that it is quite easy to recompile valgrind from sources, at it has very few dependencies.

In case of specific problems with stack traces, it is always useful to compare the stack traces produced by valgrind and gdb by using valgrind + gdb + vgdb.

Put a breakpoint in gdb at relevant places, and you can then compare the gdb stacktrace produced by the gdb backtrace command and the valgrind stacktrace produced by the monitoring command:

Source https://stackoverflow.com/questions/67917336

QUESTION

Conditional jump or move depends on uninitialised value(s) at strcpy

Asked 2021-Jun-11 at 16:02

Valgrind detects a problem with strcpy in the following code:

...

ANSWER

Answered 2021-Jun-11 at 15:29

It's strcpy(destination, source). Also strcpy() 0-terminates the copy.

So replace

Source https://stackoverflow.com/questions/67939632

QUESTION

python -X showrefcount reporting negative reference counts for extension

Asked 2021-Jun-10 at 20:52

When I run cpython with the -X showrefcount flag on an extension I'm writing, it reports a negative reference count (e.g. [-5538 refs, 13503 blocks]) when I return None from a function (using the Py-RETURN_NONE macro).

Known facts:

The exact count varies between runs, but remains within the same order of magnitude.
Whatever is happening, it seems to happen slowly; I need to call the extension function approximately 50,000 times before the reference count goes negative.
If we replace Py_RETURN_NONE; with Py_INCREF(Py_None); return Py_None;, it changes nothing. Indeed, we can seemingly add an arbitrary number of Py_INCREF(Py_None)s without affecting the reference count at all.
If we replace Py_RETURN_NONE; with return Py_None; and don't increment the reference count, it segfaults (as expected).
If we replace the None return with another value, e.g. PyLong_FromLong(0);, the problem vanishes.

What is the cause of this? Related question: why is the reference count not zero after running an empty script?

Minimal Example: build command used for cpython debug build ...

ANSWER

Answered 2021-Jun-10 at 20:52

The problem was due to the extension having been built using an older version of python, and run using a debug build compiled from the latest version of the source. Extensions not compiled using the stable ABI (and declared as doing so) are not binary compatible across python versions.

[Credit to ead's comment for asking the question that led directly to this solution.]

Source https://stackoverflow.com/questions/67878117

QUESTION

valgrind reports "Operation not permitted" but permissions seem to be ok

Asked 2021-Jun-10 at 08:51

I want to run valgrind to monitor a program binary named contextBroker this way:

...

ANSWER

Answered 2021-Jun-10 at 08:51

Using --privileged in the docker run command line solved this issue.

Thanks Nick ODell for the hint! :)

Source https://stackoverflow.com/questions/67826979

QUESTION

Proper way to fill nested struct in C from file

Asked 2021-Jun-09 at 07:56

I read data from a file that I want to fit into a structure. This structure contains an array of variable size. So I am using realloc to fill it on the fly. Unfortunately my program fails. Valgrind reports a pb with realloc:

...

ANSWER

Answered 2021-Jun-08 at 19:41

You initialize count_ligne to 0

Source https://stackoverflow.com/questions/67893350

QUESTION

"blocks are indirectly lost in loss record.." valgrind error - cpp

Asked 2021-Jun-08 at 19:57

I am trying to figure out what is wrong with my cpp code, and i need your help!

valgrind Output:

the error occurs here (in the test file): list = list.apply(getLen);

the function getLen:

...

ANSWER

Answered 2021-Jun-08 at 19:45

You allocated a SortedList object in main() which allocated memory and never freed it.

The other blocks belong to the std::string objects inside the list. They are only lost because the list holding them lost track of them.

When doing your analysis, don't worry about the 6 indirectly lost blocks, focus on the one directly lost one.

Almost certainly this is a violation of the "Rule of Five". Your SortedList does an allocation in its constructor and doesn't properly manage that allocation in its move-assignment operator.

Looking at your code in the copy assignment operator, this line is causing the leak

Source https://stackoverflow.com/questions/67893153

QUESTION

Allocate vs construct an array of ints using operator new and placement new

Asked 2021-Jun-03 at 02:24

Hello to understand more placement new, operator new, expression delete.. and separating the initialization from construction, I've tried this example:

...

ANSWER

Answered 2021-Jun-03 at 02:24

As you noted, there is no placement delete. When using placement new, you have to call destructors manually, eg:

Source https://stackoverflow.com/questions/67813300

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install valgrind

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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