IsBadReadPtr analogue on Unix

Question

Is there a function analogous to IsBadReadPtr in Unix? At least some functionalities of IsBadReadPtr? I want to write a procedure which would react if something bad happens

Answer 1

I ran into the same issue trying to read a 'pixel' from a framebuffer while running Ubuntu from within a virtualbox. There seemed to be no secure way to check access without crashing or acutally hanging gdb. The suggestion made by StasM hinted me towards to following working 'local' solution using fork.

void *some_address;
int pid = fork();
if (pid== 0)
{
    someaddress[0] = some_address[0];
    _exit(123);
}
bool access_ok = true;
int status;
int result = waitpid(pid, &status, 0);
if (result == -1 || WIFEXITED(status) == 0 || WEXITSTATUS(status) != 123)
{
    access_ok = false;
}