Mercurial > hg > nginx
annotate src/os/unix/ngx_sunpro_atomic_sparc64.h @ 7851:aa5f8825f24d
Resolver: fixed label types handling in ngx_resolver_copy().
Previously, anything with any of the two high bits set were interpreted
as compression pointers. This is incorrect, as RFC 1035 clearly states
that "The 10 and 01 combinations are reserved for future use". Further,
the 01 combination is actually allocated for EDNS extended label type
(see RFC 2671 and RFC 6891), not really used though.
Fix is to reject unrecognized label types rather than misinterpreting
them as compression pointers.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 25 May 2021 15:17:41 +0300 |
parents | d620f497c50f |
children |
rev | line source |
---|---|
561 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
561 | 5 */ |
6 | |
7 | |
8 #if (NGX_PTR_SIZE == 4) | |
9 #define NGX_CASA ngx_casa | |
10 #else | |
11 #define NGX_CASA ngx_casxa | |
12 #endif | |
13 | |
14 | |
15 ngx_atomic_uint_t | |
16 ngx_casa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock); | |
17 | |
18 ngx_atomic_uint_t | |
19 ngx_casxa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock); | |
20 | |
21 /* the code in src/os/unix/ngx_sunpro_sparc64.il */ | |
22 | |
23 | |
24 static ngx_inline ngx_atomic_uint_t | |
25 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
26 ngx_atomic_uint_t set) | |
27 { | |
1186
c114defa4518
fix atomic operations on sparc64 built by SunPro C
Igor Sysoev <igor@sysoev.ru>
parents:
611
diff
changeset
|
28 set = NGX_CASA(set, old, lock); |
561 | 29 |
30 return (set == old); | |
577 | 31 } |
561 | 32 |
33 | |
34 static ngx_inline ngx_atomic_int_t | |
35 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) | |
36 { | |
37 ngx_atomic_uint_t old, res; | |
38 | |
39 old = *value; | |
40 | |
41 for ( ;; ) { | |
42 | |
43 res = old + add; | |
44 | |
1186
c114defa4518
fix atomic operations on sparc64 built by SunPro C
Igor Sysoev <igor@sysoev.ru>
parents:
611
diff
changeset
|
45 res = NGX_CASA(res, old, value); |
561 | 46 |
47 if (res == old) { | |
48 return res; | |
49 } | |
50 | |
51 old = res; | |
52 } | |
53 } | |
563 | 54 |
55 | |
56 #define ngx_memory_barrier() \ | |
57 __asm (".volatile"); \ | |
58 __asm ("membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad"); \ | |
59 __asm (".nonvolatile") | |
611 | 60 |
61 #define ngx_cpu_pause() |