Introduce a new error level, ERR_CRITICAL, beyond which we will
minimize the amount of code that will be executed before we die; in
particular don't execute any memory allocations, and if we somehow end
up recursing, abort() immediately.
Basically, "less than panic, more than fatal."
At this point this level is used by nasm_alloc_failed().
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
malloc(0) can legitimately return NULL; it does on some systems and
not others. Force the size to 1 byte if the size is 0 coming in,
except for realloc() where this is legitimate and equivalent to
free().
Since this is an abnormal case, and can't even happen with most C
libraries, handle it on the error path, after we already got back a
NULL pointer.
Reported-by: Ozkan Sezer <sezeroz@gmail.com>
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
The single-line macro argument parsing was completely broken as a
comma would not be recognized as an argument separator.
In the process of fixing this, make a fair bit of code cleanups.
Note: reverse tokens for smacro->expansion doesn't actually make any
sense anymore, might reconsider that.
This checkin also removes the distinction between "magic" and plain
smacros; the only difference is which specific expand method is being
invoked.
Finally, extend the allocating-string functions such that *all* the
allocating string functions support querying the length of the string
a posteori.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Add a version of (v)asprintf(), which allocates a string on the
heap. Unlike the standard version of (v)asprintf(), we return the
pointer; if one wants the length of the string then one can simply use
the %n pattern.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
