There is no “inner process” as both valgrind itself and the client program it is running execute in a single process. Signals sent to that process will be delivered to the client program as normal. If the signal causes the process to terinate then valgrind’s normal exit handlers will run and (for example) report any … Read more
Yes, I recommend to treat possibly lost as severe as definitely lost. In other words, fix your code until there are no losts at all. Possibly lost can happen when you traverse an array using the same pointer that is holding it. You know that you can reset the pointer by subtracting the index. But … Read more
You can download Valgrind’s latest version from their website. Then, you can just ./autogen.sh to install Valgrind. I personally did not encounter anything needed to make. However, the sad news is, even the most recent version of Valgrind is not very usable on Mac OS Sierra. The reason is that Apple has not released the … Read more
I think you’ll find this wiki useful. TLDR main advantages of sanitizers are much smaller CPU overheads (Lsan is practically free, UBsan/Isan is 1.25x, Asan and Msan are 2-4x for computationally intensive tasks and 1.05-1.1x for GUIs, Tsan is 5-15x) wider class of detected errors (stack and global overflows, use-after-return/scope) full support of multi-threaded apps … Read more
Assuming you are running the memcheck tool and you want to ignore Leak errors in libcrypto only, you could put a suppression like: { ignore_libcrypto_conditional_jump_errors Memcheck:Leak … obj:*/libcrypto.so.* } … into a file and pass it to valgrind with –suppressions=*FILENAME*. To ignore Leak errors in all shared libraries under any lib directory (/lib, /lib64, /usr/lib, … Read more
For anyone else who is still interested in graphical output of Massif from Valgrind please consider massif-visualizer, it is beautiful. You can find the project page at KDE-Apps. For Ubuntu you should build massif-visualizer from source or install package from Kubuntu-ppa repo: add-apt-repository ppa:kubuntu-ppa/backports apt-get update && apt-get install massif-visualizer
Valgrind basically runs your application in a “sandbox.” While running in this sandbox, it is able to insert its own instructions to do advanced debugging and profiling. From the manual: Your program is then run on a synthetic CPU provided by the Valgrind core. As new code is executed for the first time, the core … Read more