Mercurial > hg > nginx
annotate src/core/ngx_cycle.h @ 6133:af7eba90645d
Win32: shared memory base addresses and remapping.
Two mechanisms are implemented to make it possible to store pointers
in shared memory on Windows, in particular on Windows Vista and later
versions with ASLR:
- The ngx_shm_remap() function added to allow remapping of a shared memory
zone to the address originally used for it in the master process. While
important, it doesn't solve the problem by itself as in many cases it's
not possible to use the address because of conflicts with other
allocations.
- We now create mappings at the same address in all processes by starting
mappings at predefined addresses normally unused by newborn processes.
These two mechanisms combined allow to use shared memory on Windows
almost without problems, including reloads.
Based on the patch by Sergey Brester:
http://mailman.nginx.org/pipermail/nginx-devel/2015-April/006836.html
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 27 Apr 2015 18:25:42 +0300 |
| parents | 967594ba7571 |
| children | 1b7e246e6b38 |
| rev | line source |
|---|---|
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2 /* |
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3 * Copyright (C) Igor Sysoev |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #ifndef _NGX_CYCLE_H_INCLUDED_ |
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9 #define _NGX_CYCLE_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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15 |
| 507 | 16 #ifndef NGX_CYCLE_POOL_SIZE |
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17 #define NGX_CYCLE_POOL_SIZE NGX_DEFAULT_POOL_SIZE |
| 507 | 18 #endif |
| 19 | |
| 20 | |
| 461 | 21 #define NGX_DEBUG_POINTS_STOP 1 |
| 22 #define NGX_DEBUG_POINTS_ABORT 2 | |
| 23 | |
| 24 | |
| 972 | 25 typedef struct ngx_shm_zone_s ngx_shm_zone_t; |
| 26 | |
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27 typedef ngx_int_t (*ngx_shm_zone_init_pt) (ngx_shm_zone_t *zone, void *data); |
| 972 | 28 |
| 29 struct ngx_shm_zone_s { | |
| 30 void *data; | |
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31 ngx_shm_t shm; |
| 972 | 32 ngx_shm_zone_init_pt init; |
| 33 void *tag; | |
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34 ngx_uint_t noreuse; /* unsigned noreuse:1; */ |
| 972 | 35 }; |
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36 |
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38 struct ngx_cycle_s { |
| 473 | 39 void ****conf_ctx; |
| 40 ngx_pool_t *pool; | |
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| 473 | 42 ngx_log_t *log; |
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43 ngx_log_t new_log; |
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45 ngx_uint_t log_use_stderr; /* unsigned log_use_stderr:1; */ |
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46 |
| 543 | 47 ngx_connection_t **files; |
| 48 ngx_connection_t *free_connections; | |
| 49 ngx_uint_t free_connection_n; | |
| 50 | |
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51 ngx_queue_t reusable_connections_queue; |
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| 473 | 53 ngx_array_t listening; |
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54 ngx_array_t paths; |
| 473 | 55 ngx_list_t open_files; |
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56 ngx_list_t shared_memory; |
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57 |
| 473 | 58 ngx_uint_t connection_n; |
| 543 | 59 ngx_uint_t files_n; |
| 60 | |
| 561 | 61 ngx_connection_t *connections; |
| 62 ngx_event_t *read_events; | |
| 63 ngx_event_t *write_events; | |
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| 473 | 65 ngx_cycle_t *old_cycle; |
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66 |
| 473 | 67 ngx_str_t conf_file; |
| 2073 | 68 ngx_str_t conf_param; |
| 2758 | 69 ngx_str_t conf_prefix; |
| 70 ngx_str_t prefix; | |
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71 ngx_str_t lock_file; |
| 2011 | 72 ngx_str_t hostname; |
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73 }; |
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74 |
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76 typedef struct { |
| 473 | 77 ngx_flag_t daemon; |
| 78 ngx_flag_t master; | |
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79 |
| 563 | 80 ngx_msec_t timer_resolution; |
| 81 | |
| 473 | 82 ngx_int_t worker_processes; |
| 83 ngx_int_t debug_points; | |
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| 543 | 85 ngx_int_t rlimit_nofile; |
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86 off_t rlimit_core; |
| 543 | 87 |
| 473 | 88 int priority; |
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| 577 | 90 ngx_uint_t cpu_affinity_n; |
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91 uint64_t *cpu_affinity; |
| 577 | 92 |
| 473 | 93 char *username; |
| 94 ngx_uid_t user; | |
| 95 ngx_gid_t group; | |
| 96 | |
| 521 | 97 ngx_str_t working_directory; |
| 611 | 98 ngx_str_t lock_file; |
| 521 | 99 |
| 473 | 100 ngx_str_t pid; |
| 543 | 101 ngx_str_t oldpid; |
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102 |
| 1069 | 103 ngx_array_t env; |
| 104 char **environment; | |
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105 } ngx_core_conf_t; |
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107 |
| 611 | 108 #define ngx_is_init_cycle(cycle) (cycle->conf_ctx == NULL) |
| 605 | 109 |
| 110 | |
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111 ngx_cycle_t *ngx_init_cycle(ngx_cycle_t *old_cycle); |
| 611 | 112 ngx_int_t ngx_create_pidfile(ngx_str_t *name, ngx_log_t *log); |
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113 void ngx_delete_pidfile(ngx_cycle_t *cycle); |
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114 ngx_int_t ngx_signal_process(ngx_cycle_t *cycle, char *sig); |
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115 void ngx_reopen_files(ngx_cycle_t *cycle, ngx_uid_t user); |
| 1069 | 116 char **ngx_set_environment(ngx_cycle_t *cycle, ngx_uint_t *last); |
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117 ngx_pid_t ngx_exec_new_binary(ngx_cycle_t *cycle, char *const *argv); |
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118 uint64_t ngx_get_cpu_affinity(ngx_uint_t n); |
| 972 | 119 ngx_shm_zone_t *ngx_shared_memory_add(ngx_conf_t *cf, ngx_str_t *name, |
| 120 size_t size, void *tag); | |
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121 |
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122 |
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123 extern volatile ngx_cycle_t *ngx_cycle; |
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124 extern ngx_array_t ngx_old_cycles; |
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125 extern ngx_module_t ngx_core_module; |
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126 extern ngx_uint_t ngx_test_config; |
| 3750 | 127 extern ngx_uint_t ngx_quiet_mode; |
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128 |
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130 #endif /* _NGX_CYCLE_H_INCLUDED_ */ |