jm + valgrind   3

Undefined Behavior in 2017
This is an extremely detailed post on the state of dynamic checkers in C/C++ (via the inimitable Marc Brooker):
Recently we’ve heard a few people imply that problems stemming from undefined behaviors (UB) in C and C++ are largely solved due to ubiquitous availability of dynamic checking tools such as ASan, UBSan, MSan, and TSan. We are here to state the obvious — that, despite the many excellent advances in tooling over the last few years, UB-related problems are far from solved — and to look at the current situation in detail.
via:marc-brooker  c  c++  coding  testing  debugging  dynamic-analysis  valgrind  asan  ubsan  tsan 
july 2017 by jm
ThreadSanitizer
Google's purify/valgrind-like concurrency checking tool:

'As a bonus, ThreadSanitizer finds some other types of bugs: thread leaks, deadlocks, incorrect uses of mutexes, malloc calls in signal handlers, and more. It also natively understands atomic operations and thus can find bugs in lock-free algorithms. [...] The tool is supported by both Clang and GCC compilers (only on Linux/Intel64). Using it is very simple: you just need to add a -fsanitize=thread flag during compilation and linking. For Go programs, you simply need to add a -race flag to the go tool (supported on Linux, Mac and Windows).'
concurrency  bugs  valgrind  threadsanitizer  threading  deadlocks  mutexes  locking  synchronization  coding  testing 
june 2014 by jm
Linux Profiling tools and techniques
great tips for system-level and app-level profiling on Linux from Padraig
profiling  optimization  linux  cache  valgrind 
april 2011 by jm

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