code-for-blog | code samples from my blog | Blog library

by senlinzhan C++ Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | code-for-blog Summary

code-for-blog is a C++ library typically used in Web Site, Blog applications. code-for-blog has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

code samples from my blog

Support

Quality

Security

License

Reuse

Support

code-for-blog has a low active ecosystem.

It has 11 star(s) with 21 fork(s). There are 3 watchers for this library.

It had no major release in the last 6 months.

There are 2 open issues and 0 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of code-for-blog is current.

Quality

code-for-blog has 0 bugs and 0 code smells.

Security

code-for-blog has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

code-for-blog code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

code-for-blog is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

code-for-blog releases are not available. You will need to build from source code and install.

It has 48 lines of code, 8 functions and 1 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of code-for-blog

Get all kandi verified functions for this library.

code-for-blog Key Features

No Key Features are available at this moment for code-for-blog.

code-for-blog Examples and Code Snippets

No Code Snippets are available at this moment for code-for-blog.

Community Discussions

Trending Discussions on code-for-blog

Measure overhead without pthread in C

Showing high and low PC of every program functions using DWARF library

QUESTION

Measure overhead without pthread in C

Asked 2019-Feb-27 at 10:52

I would like to share a test question I met recently and discuss about it:

Write a C program that roughly measures the overhead of a context switch >between the kernel and userspace on a UNIX/Linux system (without using the >pthread API). Please indicate the assumptions your rough estimation is based >on.

I would like to discuss with more advanced C programmers the different options of this problematic.

I have limited knowledge in C programming and I documented myself to provide an acceptable answer:

https://eli.thegreenplace.net/2018/measuring-context-switching-and-memory-overheads-for-linux-threads/

https://www.researchgate.net/post/How_can_I_measure_thread_creation_and_destruction

https://github.com/eliben/code-for-blog/blob/master/2018/threadoverhead/thread-pipe-msgpersec.c

I realized quickly, despite of my limited knowledge, the ambiguity of the question. Indeed, the question doesn't stipulate if an answer should be given in unit of time or memory.

I personally chose to develop my reasoning measuring time with the library time.h and a very simple snippet. Result should be divided by 1 000 000.

Does my answer make sense or am I completely missing the point ?

...

ANSWER

Answered 2019-Feb-27 at 10:52

Amazingly enough, the answer I provided above was accepted as correct in this test.

However to optimize the accuracy, we should rule out the "printf" method and go for either a syscall with invalid parameter as mentioned by Alex Hoppus or an empty method.

At the end, result should divided by 2 as mentioned by Alex Hoppus.

Source https://stackoverflow.com/questions/54551770

QUESTION

Showing high and low PC of every program functions using DWARF library

Asked 2017-Sep-13 at 02:35

I am trying to make this code work : https://github.com/eliben/code-for-blog/blob/master/2011/dwarf_get_func_addr.c It is extracted from a tutorial made by Eli Bendersky on http://eli.thegreenplace.net/2011/02/07/how-debuggers-work-part-3-debugging-information Unfortunately, low pc and high pc return always the same address for almost every function:

...

ANSWER

Answered 2017-Sep-13 at 02:35

The code in dwarf_get_func_addr.c has at least one bug: it assumes that every function has DW_AT_low_pc and DW_AT_high_pc attributes, and will print uninitialized values if that is not the case.

You should initialize lowpc = highpc = -1; on line 42, so as not to print unintialized values.

Other than that, it's impossible to help you without access to your lulesh_normal binary.

You should do readelf -wi lulesh_normal, and then step through list_func_in_die in a debugger, and compare what the program is reading there with the output from readelf -- they should match one to one. If they don't, your version of libdwarf is possibly buggy.

Source https://stackoverflow.com/questions/46170156

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

Vulnerabilities

No vulnerabilities reported

Install code-for-blog

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 .

Find more information at: