mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2025-01-05 12:56:08 +00:00
Code Issues Releases Activity

Add M_PANIC flag to the list of available flags passed to malloc().

Browse Source 
With this flag set malloc() will panic if memory allocation failed.
This usable only in critical places where failed allocation is fatal.

Reviewed by:	peter
This commit is contained in:
Boris Popov 2001-01-29 12:48:37 +00:00
parent 920c17857f
commit 9211b0b657
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=71799
2 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
sys/kern/kern_malloc.c
View File

@ -164,7 +164,8 @@ malloc(size, type, flags)
if (flags & M_NOWAIT) {
splx(s);
mtx_exit(&malloc_mtx, MTX_DEF);
return ((void *) NULL);
va = NULL;
goto checkpanic;
}
if (ksp->ks_limblocks < 65535)
ksp->ks_limblocks++;
@ -188,7 +189,7 @@ malloc(size, type, flags)
if (va == NULL) {
splx(s);
return ((void *) NULL);
goto checkpanic;
}
/*
* Enter malloc_mtx after the error check to avoid having to
@ -282,6 +283,9 @@ malloc(size, type, flags)
/* XXX: Do idle pre-zeroing. */
if (va != NULL && (flags & M_ZERO))
bzero(va, size);
checkpanic:
if (va == NULL && (flags & M_PANIC))
panic("malloc: failed to allocate %ld bytes", size);
return ((void *) va);
}

1
sys/sys/malloc.h
View File

@ -47,6 +47,7 @@
#define M_USE_RESERVE 0x0002 /* can alloc out of reserve memory */
#define M_ASLEEP 0x0004 /* async sleep on failure */
#define M_ZERO 0x0008 /* bzero the allocation */
#define M_PANIC 0x0010 /* panic if allocation failed */
#define M_MAGIC 877983977 /* time when first defined :-) */