On Monday, July 29, 2024, Sebastian Wittmeier wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>

  
  
  
  

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<p>I think Thiago was referring to storing thread-local variables for reentrant intercepted function calls.<br></p></div></blockquote><div><br></div><div><br></div><div>Pick a max recursion depth, let&#39;s say:</div><div><br></div><div>    #define MAX_RECURSION (16u)</div><div><br></div><div>and then we have:</div><div><br></div><div>    thread_local unsigned current_depth = 0u;</div><div><br></div><div>    thread_local void *addresses[ MAX_RECURSION ];</div><div><br></div><div>No linked list and no dynamic allocation.</div><div><br></div><div>I&#39;m typing this out on my phone right now and I don&#39;t have a compiler, and GodBolt is too big for my phone screen, but when I&#39;m home later I&#39;ll show an implementation of an interceptor of a recursive function.</div><div><br></div><div>(Although in most cases, once you call the original function in the library, any subsequent recursive calls will directly call the original function, thus bypassing the interceptor -- however this won&#39;t necessarily happen in the case of a GUI loop, e.g. how wxWidgets starts a second message loop when you show a modal message box).</div><div><br></div><div><br></div>