src/lib/libc/stdlib/malloc.c, branch upstream/2.2.0

Bring in thread locking fix from rev 1.19.

1996-12-30T01:35:15Z

Approved by: jkh

If you run with option Z and malloc fails, memset gets called

1996-10-29T20:35:39Z

with a NULL pointer (archie) Explain that minsize is also the smallest alignment. Submitted by: Archie Cobbs

Various cosmetics

1996-10-26T08:19:07Z

Improve chances of troublefree 64bit operation. [imp] Noticed by: Warner Losh

malloc_pages should be static.

1996-10-20T13:20:57Z

Add progname to warning/error message layout. (joerg) Remove inline assembler, no speed impact, not need for the obfuscation (bde) Remove on the fly calculation of parameters, no longer critical. Make D & U flags valid even if we don't support them. Don't call imalloc until we're done initializing. Zap contents on free() if we have "Junk" set. [*] Various nitpicking. [*] As a sideeffect of this change, if you are worried about sensitive data lingering in memory, you can use the 'Junk' option now to make sure phkmalloc zaps memory when it is returned. add char * malloc_options = "J"; to your source. Obviously there is a performance impact.

Fix a typo.

1996-09-25T16:29:15Z

Reviewed by: phk

A number of minor bogons and portability things from jdp.

1996-09-25T08:30:46Z

Submitted by: jdp

phkmalloc/3

1996-09-23T19:26:39Z

Various neat features added. More documentation in the manpage. If your machine has very little RAM, I guess that would be < 16M these days :-(, you may want to try this: ln -fs 'H<' /etc/malloc.conf check the manpage.

Fix a very rare error condition: The code to free VM back to the kernel

1996-09-17T19:50:23Z

as done after a quasi-recursive call to free() had modified what we thought we knew about the last chunk of pages. This bug manifested itself when I did a "make obj" from src/usr.sbin/lpr, then make would coredump in the lpd directory.

Isolated all the crap for thread-safe so I can see what goes on again...

1996-07-03T05:03:07Z

Reviewed by: julian and (hsu?)

1996-01-22T00:02:33Z

Submitted by: John Birrel(L?) changes for threadsafe operations