CVS log for src/usr.bin/xlint/lint2/Attic/mem2.c

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Keyword substitution: kv
Default branch: MAIN

lint: move xalloc to the only file where it is used

No functional change.

lint: remove custom memory allocator

Besides adding complexity, the custom memory allocator didn't invalidate
freed memory, which made it harder to find possible use-after-free bugs.

lint: use __RCSID in lint mode as well

Since 1995-10-02, lint supports __asm statements and __asm modifiers.

No binary change.

lint: fix memory allocation (since 2021-08-28)

In mem1.c 1.50 and mem2.c 1.13 from 2021-08-28, I accidentally changed
the initialization of mblklen from round_up to round_down, trying to
avoid a division instruction.

On NetBSD x86_64 this resulted in a few more malloc calls, but on Cygwin
with its 64k pagesize, mblklen became 0.  Later, the function xalloc in
lint2 called xalloc(mblklen) and blindly assumed that the returned
memory would be large enough.  This in turn led to out-of-bounds memory
access and crashes.  Lint1 was not affected since it adjust mblklen
during runtime if it gets too small.

lint: use 'unsigned int' for bit-size of types

Lint does not need to support any types larger than 256 MB since they
don't occur in practice.  Practically, such large types have never been
supported at all since the function type_size_in_bits used int for the
internal calculations, resulting in overflows.

lint: remove xmapalloc

Just trust the standard malloc to be smart enough.

No functional change.

lint: remove redundant parentheses around return value

lint: sort includes

Pull up revision 1.9 (requested by jmc in ticket #527):
Completely rework how tools/compat is done. Purge all uses/references to
_NETBSD_SOURCE as this makes cross building from older/newer versions of
NetBSD harder, not easier (and also makes the resulting tools 'different')
Wrap all required code with the inclusion of nbtool_config.h, attempt to
only use POSIX code in all places (or when reasonable test w. configure and
provide definitions: ala u_int, etc).
Reviewed by lukem. Tested on FreeBSD 4.9, Redhat Linux ES3, NetBSD 1.6.2 x86
NetBSD current (x86 and amd64) and Solaris 9.
Fixes PR's: PR#17762 PR#25944

Completely rework how tools/compat is done. Purge all uses/references to
_NETBSD_SOURCE as this makes cross building from older/newer versions of
NetBSD harder, not easier (and also makes the resulting tools 'different')

Wrap all required code with the inclusion of nbtool_config.h, attempt to
only use POSIX code in all places (or when reasonable test w. configure and
provide definitions: ala u_int, etc).

Reviewed by lukem. Tested on FreeBSD 4.9, Redhat Linux ES3, NetBSD 1.6.2 x86
NetBSD current (x86 and amd64) and Solaris 9.

Fixes PR's: PR#17762 PR#25944

PR/23219: Dan McMahill: Make this compile on system that don't have MAP_ANON.
Centralize the mmap allocations in a new function, xmapalloc() that handles
this.

Protect __RCSID and __COPYRIGHT from being invoked if not defined.

Add hooks for compiling on non-NetBSD hosts.

cleanup (prior to more adding more features):
- convert to ANSI KNF
- remove trailing whitespace
- translate some comments from german into english

code compiles and runs clean, and tested by running "make lint" against
xlint source using previous and this lint produces same results.

WARNSify

support asm statements and asm modifiers in declarations

asm statements consist of an asm keyword, an optional qualifier, a
left paren, a list of tokens up to and including the matching right
paren, and a semicolon.

asm modifiers consist of an asm keyword, an left paren, a string and a
right paren.

asm statements and modifiers have no semantic for lint(1), they exist only
to avoid complaints about them.

RCS id cleanup

lint(1) implementation, by Jochen Pohl.  named 'xlint' for a similar
reason to why 'install' is named 'xinstall'.

Initial revision