codechecker VS hotspot

python3 new.py docker-php-extension-installer: https://github.com/mlocati/docker-php-extension-installer codechecker: https://github.com/Ericsson/codechecker SingleFileZ: https://github.com/gildas-lormeau/SingleFileZ china-dictatorship: https://github.com/cirosantilli/china-dictatorship vscode-docker: https://github.com/microsoft/vscode-docker flask-bones: https://github.com/cburmeister/flask-bones ProjectFib: https://github.com/anantdgoel/ProjectFib S3Mock: https://github.com/adobe/S3Mock home: https://github.com/gege-circle/home docker-php: https://github.com/chialab/docker-php dockbix-xxl: https://github.com/monitoringartist/dockbix-xxl wind-layer: https://github.com/sakitam-fdd/wind-layer powerstrip: https://github.com/ClusterHQ/powerstrip selenium-jupiter: https://github.com/bonigarcia/selenium-jupiter gnome-shell-extension-docker: https://github.com/gpouilloux/gnome-shell-extension-docker hacktoberfest-2022: https://github.com/docker/hacktoberfest-2022 azure-docker-extension: https://github.com/Azure/azure-docker-extension pgrocks-fdw: https://github.com/vidardb/pgrocks-fdw docker-php-yii2: https://github.com/dmstr/docker-php-yii2 docker-community-extensions: https://github.com/collabnix/docker-community-extensions alpine-php-fpm: https://github.com/joseluisq/alpine-php-fpm autoview-tradingview-chrome-docker-bot: https://github.com/IAMtheIAM/autoview-tradingview-chrome-docker-bot .config: https://github.com/zszszszsz/.config docker-phpfpm: https://github.com/adhocore/docker-phpfpm coc-docker: https://github.com/josa42/coc-docker china-dictatorhsip-6: https://github.com/cirosantilli/china-dictatorhsip-6 testcontainers-spock: https://github.com/testcontainers/testcontainers-spock Dockery: https://github.com/oslabs-beta/Dockery docker-extension: https://github.com/tailscale/docker-extension volumes-backup-extension: https://github.com/docker/volumes-backup-extension ajeetraina@Docker-Ajeet-Singh-Rainas-MacBook-Pro chatgpt % vi new.py ajeetraina@Docker-Ajeet-Singh-Rainas-MacBook-Pro chatgpt % python3 new.py .config: https://github.com/zszszszsz/.config Dockery: https://github.com/oslabs-beta/Dockery docker-extension: https://github.com/tailscale/docker-extension ransomware: https://github.com/abhir98/ransomware jfrog-docker-desktop-extension: https://github.com/jfrog/jfrog-docker-desktop-extension dd-extension-lgtm: https://github.com/cedricziel/dd-extension-lgtm openshift-dd-ext: https://github.com/redhat-developer/openshift-dd-ext k9s-dd-extension: https://github.com/spurin/k9s-dd-extension pgadmin4-docker-extension: https://github.com/marcelo-ochoa/pgadmin4-docker-extension trivy-docker-extension: https://github.com/aquasecurity/trivy-docker-extension drone-ci-docker-extension: https://github.com/harness/drone-ci-docker-extension docker-extension: https://github.com/loopDelicious/docker-extension swagger-editor-docker-extension: https://github.com/n-murphy/swagger-editor-docker-extension wasm-docker-extension: https://github.com/cmrigney/wasm-docker-extension microcks-docker-desktop-extension: https://github.com/microcks/microcks-docker-desktop-extension docker-extension-golang-playground: https://github.com/rumpl/docker-extension-golang-playground diveintoansible-extension: https://github.com/spurin/diveintoansible-extension docker-desktop-extension: https://github.com/okteto/docker-desktop-extension docker-extension-rabbitmq: https://github.com/Yogendra0Sharma/docker-extension-rabbitmq docker-storj-extension: https://github.com/elek/docker-storj-extension github-registry-docker-desktop-extension: https://github.com/peacecwz/github-registry-docker-desktop-extension docker-desktop-extension-issues: https://github.com/mutagen-io/docker-desktop-extension-issues sdw-docker-extension: https://github.com/marcelo-ochoa/sdw-docker-extension vcluster-dd-extension: https://github.com/loft-sh/vcluster-dd-extension extension-docker-desktop: https://github.com/epinio/extension-docker-desktop asyncapi-studio-docker-extension: https://github.com/thiyagu06/asyncapi-studio-docker-extension gefyra-docker-desktop-extension: https://github.com/gefyrahq/gefyra-docker-desktop-extension oraclexe-docker-extension: https://github.com/marcelo-ochoa/oraclexe-docker-extension docker-extensions-101: https://github.com/collabnix/docker-extensions-101 step-ca-docker-extension: https://github.com/hslatman/step-ca-docker-extension

Regarding problems on clang-tidy - have you looked into Codechecker? It is based on clang tidy but also supports cppcheck and marking issues as false positives/will not fix etc... https://github.com/Ericsson/codechecker

I've been down the llvm / clang / mlir rabbit hole recently and drank this : https://codechecker.readthedocs.io ...

Seconding `rr` as suggested by @tux3, it's great for debugging.

Also, the sanitizers for GCC and Clang (https://github.com/google/sanitizers), and the Clang static analyzer (and tidy too) through CodeChecker (https://codechecker.readthedocs.io/).

For the Clang static analyzer, make sure your LLVM toolchain has the Z3 support enabled (OK in Debian stable for example), and enable cross translation units (CTU) analysis too for better results.

If you have the bandwidth, I'd also recommend using something like https://github.com/Ericsson/codechecker which allows you to add results of analysis/tests to a database. This would in turn allow you to set your "stable" branch pipelines to fail if the diff of problems between runs shows you've introduced more issues that haven't been marked as addressed.

Another open source alternative is CodeChecker [1] with the Clang static analyzer [2]. Make sure the Clang toolchain has been compiled with Z3 [3] support for better results (it's the case in Debian stable), particularly for code doing bit operations. It supports cross files analysis ("cross translation units" or CTU), which last time I checked was not the case for IKOS and helps improve diagnostics.

It's not completely turn key if you use it for a cross compiled code base, but once set-up I prefer it to another professional tool: much less false alarms. Although it's good to have both, each one found issues not seen by the other.

  [1] https://github.com/Ericsson/codechecker

perf with Hotspot 👌

If you’re able to use perf on Linux, I would recommend hotspot for visualizing the results.

I can recommend you using the https://github.com/KDAB/hotspot/ tool whenever you want to study performance.

Every Linux C/C++/Rust developer should know about https://github.com/KDAB/hotspot. It's convenient and fast. I use it for Rust all the time, and it provides all of these features on the back of regular old `perf`.

Flamegraphs alone aren't a full picture of what your application is doing, but it can give you hints as to where to look. Another tool I often use is Hotspot which can open the perf.data file and provide more options for filtering and digging into the gathered data beyond the single flamegraph.

Ignore the command, it's just a placeholder to get meaningful values. The -d flag adds basic cache events, by adding another -d you also get load and load miss events for the dTLB, iTLB and L1i cache.

But as mentioned, you can instrument any event supported by your system. Including very obscure events such as uops_executed.cycles_ge_2_uops_exec (Cycles where at least 2 uops were executed per-thread) or frontend_retired.latency_ge_2_bubbles_ge_2 (Retired instructions that are fetched after an interval where the front-end had at least 2 bubble-slots for a period of 2 cycles which was not interrupted by a back-end stall).

You can also record data using perf-record(1) and inspect them using perf-report(1) or - my personal favorite - the Hotspot tool (https://github.com/KDAB/hotspot).

Sorry for hijacking the discussion a little, but I think perf is an awesome little tool and not as widely known as it should be. IMO, when using it as a profiler (perf-record), it is vastly superior to any language-specific built-in profiler. Unfortunately some languages (such as Python or Haskell) are not a good fit for profiling using perf instrumentation as their stack frame model does not quite map to the C model.

> [...] how Perf compares to vendor tools like vTune [...] ?

Regarding the hardware events that Perf can capture on x86, it has pretty much all of them. So it should be equivalent to vTune for all practical purposes.

The big difference is in the UI -- or absence thereof. Perf is a low-level tool and its output is mostly text files. There is a curses-based TUI for perf-report (and even gtk version, but it is essentially the same as the TUI, just using GTK2 widgets), but that's about it.

By contrast, vTune comes with a heavy (electron-based?) GUI and is quite helpful in guiding beginners, with many graphs and explanations.

Of course, one can (and is expected to) complement Perf with an assortment of tools that process its output for visualization. For example, the flamegraph [1] and heat map [2] tools described in the article. But also KDAB hotspot [3] or HPerf for a vTune-style perf-report.

[1] https://github.com/brendangregg/FlameGraph

[2] https://github.com/brendangregg/HeatMap

[3] https://github.com/KDAB/hotspot

[4] https://www.poirrier.ca/hperf/

https://github.com/KDAB/hotspot might contain parsing code you could use as an example (other than perf script). It always accepts raw perf.data, and there doesn't seem to be a way to feed it the output of perf script, so it might be parsing it directly instead of calling perf script.