CODEWITHSUNDEEP
cunixbsd
Aragorn
Aragorn

Reputation: 107

Vfork() and more corruption

my question is on execution what will happen to parent stack?

main()
{
    f();
    g();
}
f()
{
   vfork();
}
g()
{ 
    int blast[100],i;
    for(i=0;i<100;i++)
        blast[i]=i;
}

Upvotes: 0

Views: 149

Answers (2)

Basile Starynkevitch
Basile Starynkevitch

Reputation: 1

In practice, vfork is not very useful any more. Read its vfork man page for Linux, which says that POSIX.1-2008 removes the specification of vfork(). the behavior is practically nearly the same as for fork (except that the parent is suspended). So I'll bet that practically, vfork is nearly like fork today. But all the programs I've read in the last ten years used fork not vfork (because the lazy copy on write paging behavior is efficient enough today).

Upvotes: -2

chill
chill

Reputation: 16888

The behavior is undefined as per http://pubs.opengroup.org/onlinepubs/009695399/functions/vfork.html

the behavior is undefined if the process created by vfork() [...] returns from the function in which vfork() was called [...]

Upvotes: 3

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