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authorLaurent Bercot <ska-skaware@skarnet.org>2024-05-05 20:51:26 +0000
committerLaurent Bercot <ska@appnovation.com>2024-05-05 20:51:26 +0000
commit520110086dbb3cbe543fc1930fab3bbac2becc21 (patch)
treefae84e875c7fd564838fea79956f3711218d60b8 /src
parent6d0c114f57bcd554383a41c9ca791e25e95b81b5 (diff)
downloads6-520110086dbb3cbe543fc1930fab3bbac2becc21.tar.xz
s6-ftrigrd: don't have in-object pointers when reallocing
Make all pointers out-of-object, even if that means an additional alloc. Objects that move need to be flat, so in the absence of a proper multi-object storage structure, deep allocs is the only solution. The alternative is to use gensetdyn so objects don't move, but here we already have a ftrig1_t, a stralloc and a regex_t making deep allocs, so who cares about one more - the overhead of gensetdyn is probably more expensive. Signed-off-by: Laurent Bercot <ska@appnovation.com>
Diffstat (limited to 'src')
-rw-r--r--src/libs6/s6-ftrigrd.c21
1 files changed, 15 insertions, 6 deletions
diff --git a/src/libs6/s6-ftrigrd.c b/src/libs6/s6-ftrigrd.c
index b6ca40b..5083a37 100644
--- a/src/libs6/s6-ftrigrd.c
+++ b/src/libs6/s6-ftrigrd.c
@@ -13,6 +13,7 @@
#include <skalibs/error.h>
#include <skalibs/strerr.h>
#include <skalibs/buffer.h>
+#include <skalibs/alloc.h>
#include <skalibs/stralloc.h>
#include <skalibs/genalloc.h>
#include <skalibs/sig.h>
@@ -38,7 +39,6 @@ struct ftrigio_s
unsigned int xindex ;
ftrig1_t trig ;
buffer b ;
- char buf[FTRIGRD_BUFSIZE] ;
regex_t re ;
stralloc sa ;
uint32_t options ;
@@ -48,8 +48,9 @@ struct ftrigio_s
static genalloc g = GENALLOC_ZERO ; /* ftrigio */
-static void ftrigio_deepfree (ftrigio *p)
+static void ftrigio_free (ftrigio *p)
{
+ alloc_free(&p->b.c.x) ;
ftrig1_free(&p->trig) ;
stralloc_free(&p->sa) ;
regfree(&p->re) ;
@@ -59,7 +60,7 @@ static void cleanup (void)
{
size_t n = genalloc_len(ftrigio, &g) ;
ftrigio *a = genalloc_s(ftrigio, &g) ;
- for (size_t i = 0 ; i < n ; i++) ftrigio_deepfree(a + i) ;
+ for (size_t i = 0 ; i < n ; i++) ftrigio_free(a + i) ;
genalloc_setlen(ftrigio, &g, 0) ;
}
@@ -88,9 +89,8 @@ static void remove (size_t i)
{
size_t n = genalloc_len(ftrigio, &g) ;
ftrigio *a = genalloc_s(ftrigio, &g) ;
- ftrigio_deepfree(a + i) ;
+ ftrigio_free(a + i) ;
a[i] = a[--n] ;
- a[i].b.c.x = a[i].buf ;
genalloc_setlen(ftrigio, &g, n) ;
}
@@ -153,6 +153,7 @@ static int parse_protocol (struct iovec const *v, void *context)
{
size_t n = genalloc_len(ftrigio, &g) ;
ftrigio *p ;
+ char *x ;
uint32_t options, pathlen, relen ;
int r ;
if (v->iov_len < 19)
@@ -173,20 +174,28 @@ static int parse_protocol (struct iovec const *v, void *context)
answer(ENOMEM) ;
break ;
}
+ x = alloc(FTRIGRD_BUFSIZE) ;
+ if (!x)
+ {
+ answer(ENOMEM) ;
+ break ;
+ }
p = genalloc_s(ftrigio, &g) + n ;
r = skalibs_regcomp(&p->re, s + 16 + pathlen, REG_EXTENDED) ;
if (r)
{
+ alloc_free(x) ;
answer(r == REG_ESPACE ? ENOMEM : EINVAL) ;
break ;
}
if (!ftrig1_make(&p->trig, s + 15))
{
regfree(&p->re) ;
+ alloc_free(x) ;
answer(errno) ;
break ;
}
- buffer_init(&p->b, &buffer_read, p->trig.fd, p->buf, FTRIGRD_BUFSIZE) ;
+ buffer_init(&p->b, &buffer_read, p->trig.fd, x, FTRIGRD_BUFSIZE) ;
p->options = options ;
p->id = id ;
p->sa = stralloc_zero ;