Question: about functionality with Signals

[rieckhof]

Hello I think your library really cool and I am evaluating if we could use it in the project. So I have the following questions:

• How does the signal handling works since you are using classes like std::vector for in the printer class, which are not to be used while signal handling according to signals cpp?

Best Regards Federico

[bombela]

It works because in real life, most signals are not around failures of the memory allocator (ie: malloc) itself. As long as you can allocate memory, you are pretty ok.

Now, here is an example where backward will deadlock:

• you buffer overflow inside your allocator data structure
• you ask your allocator to free or allocate something
• allocator acquires some locks
• allocator shit itself because its datastructures are corrupted
• signal is raised, backward-cpp kicks in
• while walking the stack, backward-cpp tries to allocate memory, calling your allocator...
• allocator tries to acquires some locks... oops, deadlock.