#StackBounty: #c++ #arm #embedded #std #cortex-m Dynamic memory allocation in STD

Bounty: 100

Working a lot with microcontrollers and C++ it is important for me to know that I do not perform dynamic memory allocations. However I would like to get the most out of the STD lib. What would be the best strategy to determine if a function/class from STD uses dynamic memory allocation?

So far I come up with these options:

  1. Read and understand the STD code. This is of course possible but lets be honest, it is not the easiest code to read and there is a lot of it.
  2. A variation on reading the code could be to have a script search for memory allocation and highlight those parts to it make it easier to read. This still would require figuring out where functions allocating memory are used, and so forts.
  3. Just testing what I would like to use and watch the memory with the debugger. So far I have been using this method but this is a reactive approach. I would like to know before hand when designing code what I can use from STD. Also what is there to say that there are some (edge) cases where memory is allocated. Those might not show up in this limited test.
  4. Finally what could be done is regularly scan the generated assembler code for memory allocations. I suspect this could be scripted and included in the toolchain but again this is a reactive method.

If you see any other options or have experience doing something similar, please let me know.

p.s. I work mainly with ARM Cortex-Mx chips at this moment compiling with GCC.


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