Re: Overcomittable memory

From: Olaf Weber (olaf@infovore.xs4all.nl)
Date: Fri Mar 31 2000 - 14:51:12 EST

John Ripley writes:
> Olaf Weber wrote:

>> volatile caddr_t bad_addr;
>> jmp_buf env;
>>
>> void sigbus_action(int sig, siginfo_t *siginfo, void *dummy)
>> {
>> if (siginfo) {
>> bad_addr = siginfo->si_addr;
>> }
>> longjmp(env, 1);
>> }

> longjmp won't work because it'll be running the program from within
> the signal handler.

You are definitely allowed to use longjmp to return from a signal
handler when the signal was produced by raise(3) or abort(3). Many
systems, AFAIK Linux among them, allow you to use longjmp in the
general case. 

-- 
Olaf Weber

Do not meddle in the affairs of sysadmins,
        for they are quick to anger and have no need for subtlety.

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