1 /*
2 +----------------------------------------------------------------------+
3 | Zend OPcache |
4 +----------------------------------------------------------------------+
5 | Copyright (c) The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | https://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Andi Gutmans <andi@php.net> |
16 | Zeev Suraski <zeev@php.net> |
17 | Stanislav Malyshev <stas@zend.com> |
18 | Dmitry Stogov <dmitry@php.net> |
19 +----------------------------------------------------------------------+
20 */
21
22 #include "zend_shared_alloc.h"
23
24 #ifdef USE_SHM_OPEN
25
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <stdio.h>
29 #include <fcntl.h>
30 #include <sys/mman.h>
31 #include <unistd.h>
32 #include <stdlib.h>
33
34 typedef struct {
35 zend_shared_segment common;
36 int shm_fd;
37 } zend_shared_segment_posix;
38
create_segments(size_t requested_size,zend_shared_segment_posix *** shared_segments_p,int * shared_segments_count,const char ** error_in)39 static int create_segments(size_t requested_size, zend_shared_segment_posix ***shared_segments_p, int *shared_segments_count, const char **error_in)
40 {
41 zend_shared_segment_posix *shared_segment;
42 char shared_segment_name[sizeof("/ZendAccelerator.") + 20];
43
44 *shared_segments_count = 1;
45 *shared_segments_p = (zend_shared_segment_posix **) calloc(1, sizeof(zend_shared_segment_posix) + sizeof(void *));
46 if (!*shared_segments_p) {
47 *error_in = "calloc";
48 return ALLOC_FAILURE;
49 }
50 shared_segment = (zend_shared_segment_posix *)((char *)(*shared_segments_p) + sizeof(void *));
51 (*shared_segments_p)[0] = shared_segment;
52
53 sprintf(shared_segment_name, "/ZendAccelerator.%d", getpid());
54 shared_segment->shm_fd = shm_open(shared_segment_name, O_RDWR|O_CREAT|O_TRUNC, 0600);
55 if (shared_segment->shm_fd == -1) {
56 *error_in = "shm_open";
57 return ALLOC_FAILURE;
58 }
59
60 if (ftruncate(shared_segment->shm_fd, requested_size) != 0) {
61 *error_in = "ftruncate";
62 shm_unlink(shared_segment_name);
63 return ALLOC_FAILURE;
64 }
65
66 shared_segment->common.p = mmap(0, requested_size, PROT_READ | PROT_WRITE, MAP_SHARED, shared_segment->shm_fd, 0);
67 if (shared_segment->common.p == MAP_FAILED) {
68 *error_in = "mmap";
69 shm_unlink(shared_segment_name);
70 return ALLOC_FAILURE;
71 }
72 shm_unlink(shared_segment_name);
73
74 shared_segment->common.pos = 0;
75 shared_segment->common.size = requested_size;
76
77 return ALLOC_SUCCESS;
78 }
79
detach_segment(zend_shared_segment_posix * shared_segment)80 static int detach_segment(zend_shared_segment_posix *shared_segment)
81 {
82 munmap(shared_segment->common.p, shared_segment->common.size);
83 close(shared_segment->shm_fd);
84 return 0;
85 }
86
segment_type_size(void)87 static size_t segment_type_size(void)
88 {
89 return sizeof(zend_shared_segment_posix);
90 }
91
92 const zend_shared_memory_handlers zend_alloc_posix_handlers = {
93 (create_segments_t)create_segments,
94 (detach_segment_t)detach_segment,
95 segment_type_size
96 };
97
98 #endif /* USE_SHM_OPEN */
99
