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ash: use bbox wrappers for malloc etc instead of homegrown ones

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function                                             old     new   delta
popstring                                            134     140      +6
ckmalloc                                               9       -      -9
ckstrdup                                              22       -     -22
ckrealloc                                             24       -     -24
ckzalloc                                              28       -     -28
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(add/remove: 0/4 grow/shrink: 1/0 up/down: 6/-83)             Total: -77 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-10-11 00:45:25 +02:00
parent 0e5e4eaf7b
commit e7670ff81d
1 changed files with 44 additions and 34 deletions
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78
shell/ash.c
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@ -1155,6 +1155,49 @@ errmsg(int e, const char *em)
/* ============ Memory allocation */
#if 0
/* I consider these wrappers nearly useless:
* ok, they return you to nearest exception handler, but
* how much memory do you leak in the process, making
* memory starvation worse?
*/
static void *
ckrealloc(void * p, size_t nbytes)
{
p = realloc(p, nbytes);
if (!p)
ash_msg_and_raise_error(bb_msg_memory_exhausted);
return p;
}
static void *
ckmalloc(size_t nbytes)
{
return ckrealloc(NULL, nbytes);
}
static void *
ckzalloc(size_t nbytes)
{
return memset(ckmalloc(nbytes), 0, nbytes);
}
static char *
ckstrdup(const char *s)
{
char *p = strdup(s);
if (!p)
ash_msg_and_raise_error(bb_msg_memory_exhausted);
return p;
}
#else
/* Using bbox equivalents. They exit if out of memory */
# define ckrealloc xrealloc
# define ckmalloc xmalloc
# define ckzalloc xzalloc
# define ckstrdup xstrdup
#endif
/*
* It appears that grabstackstr() will barf with such alignments
* because stalloc() will return a string allocated in a new stackblock.
@ -1210,43 +1253,10 @@ extern struct globals_memstack *const ash_ptr_to_globals_memstack;
herefd = -1; \
} while (0)
#define stackblock() ((void *)g_stacknxt)
#define stackblocksize() g_stacknleft
static void *
ckrealloc(void * p, size_t nbytes)
{
p = realloc(p, nbytes);
if (!p)
ash_msg_and_raise_error(bb_msg_memory_exhausted);
return p;
}
static void *
ckmalloc(size_t nbytes)
{
return ckrealloc(NULL, nbytes);
}
static void *
ckzalloc(size_t nbytes)
{
return memset(ckmalloc(nbytes), 0, nbytes);
}
/*
* Make a copy of a string in safe storage.
*/
static char *
ckstrdup(const char *s)
{
char *p = strdup(s);
if (!p)
ash_msg_and_raise_error(bb_msg_memory_exhausted);
return p;
}
/*
* Parse trees for commands are allocated in lifo order, so we use a stack
* to make this more efficient, and also to avoid all sorts of exception