src/lib/libc/stdlib/malloc.c, branch stable/3

$Id$ -> $FreeBSD$

1999-08-29T14:49:43+00:00

Back out previous commit after discussing it with Dmitrij Tejblum.

1999-07-07T21:01:20+00:00

MFC: Always set errno to ENOMEM when returning 0.

1999-07-07T19:58:14+00:00

MFC: Disable the "Hint" option in phkmalloc as default.

1999-05-09T18:41:49+00:00

Reviewed by:	Poul-Henning Kamp

Delete the XXX comments that refer to spinlock recursion. The malloc/free/

1998-09-30T06:13:59+00:00

realloc functions check for recursion within the malloc code itself. In
a thread-safe library, the single spinlock ensures that no two threads
go inside the protected code at the same time. The thread implementation
is responsible for ensuring that the spinlock does in fact protect malloc.
There was a window of opportunity in which this was not the case. I'll fix
that with a commit RSN.

Use 8k pagesize on alpha, not 4k.

1998-09-23T21:26:04+00:00

Back out part of previous commit (even though it's technically correct).

1998-09-20T01:07:50+00:00

Our spinlock implementation allows a particular thread to obtain a lock
multiple times, but release the lock with a single unlock call.  Since
we're detecting recursion, we know the lock is already owned by the
current thread in a previous call and must not be released in the
current call.  This is really far too dependent on this particular
spinlock implementation, so I've added commented out calls to
THREAD_UNLOCK in the appropriate places.  We can activate this code when
spinlock is taught to count each lock operation.

Correctly back out of free if a recursive call into malloc.c is detected.

1998-09-19T20:55:36+00:00

Set malloc_func *after* grabbing the thread lock.

Noticed by:	Simon Coggins

preserve errno across the readlink() calls. There is no value in trashing

1998-06-18T09:13:16+00:00

errno during a successful malloc() call.

Add support for thread lock debug. No impact of the malloc code.

1998-06-09T08:30:32+00:00