src/internal/pthread_impl.h

   1 #ifndef _PTHREAD_IMPL_H
   2 #define _PTHREAD_IMPL_H
   3
   4 #include <pthread.h>
   5 #include <signal.h>
   6 #include <errno.h>
   7 #include <limits.h>
   8 #include <sys/mman.h>
   9 #include "libc.h"
  10 #include "syscall.h"
  11 #include "atomic.h"
  12 #include "futex.h"
  13
  14 #define pthread __pthread
  15
  16 struct pthread {
  17         /* Part 1 -- these fields may be external or
  18          * internal (accessed via asm) ABI. Do not change. */
  19         struct pthread *self;
  20         void **dtv, *unused1, *unused2;
  21         uintptr_t sysinfo;
  22         uintptr_t canary, canary2;
  23
  24         /* Part 2 -- implementation details, non-ABI. */
  25         int tid;
  26         int errno_val;
  27         volatile int detach_state;
  28         volatile int cancel;
  29         volatile unsigned char canceldisable, cancelasync;
  30         unsigned char tsd_used:1;
  31         unsigned char unblock_cancel:1;
  32         unsigned char dlerror_flag:1;
  33         unsigned char *map_base;
  34         size_t map_size;
  35         void *stack;
  36         size_t stack_size;
  37         size_t guard_size;
  38         void *start_arg;
  39         void *(*start)(void *);
  40         void *result;
  41         struct __ptcb *cancelbuf;
  42         void **tsd;
  43         struct {
  44                 volatile void *volatile head;
  45                 long off;
  46                 volatile void *volatile pending;
  47         } robust_list;
  48         volatile int timer_id;
  49         locale_t locale;
  50         volatile int killlock[1];
  51         char *dlerror_buf;
  52         void *stdio_locks;
  53
  54         /* Part 3 -- the positions of these fields relative to
  55          * the end of the structure is external and internal ABI. */
  56         uintptr_t canary_at_end;
  57         void **dtv_copy;
  58 };
  59
  60 struct start_sched_args {
  61         void *start_arg;
  62         void *(*start_fn)(void *);
  63         sigset_t mask;
  64         pthread_attr_t *attr;
  65         volatile int futex;
  66 };
  67
  68 enum {
  69         DT_EXITED = 0,
  70         DT_EXITING,
  71         DT_JOINABLE,
  72         DT_DETACHED,
  73         DT_DYNAMIC,
  74 };
  75
  76 struct __timer {
  77         int timerid;
  78         pthread_t thread;
  79 };
  80
  81 #define __SU (sizeof(size_t)/sizeof(int))
  82
  83 #define _a_stacksize __u.__s[0]
  84 #define _a_guardsize __u.__s[1]
  85 #define _a_stackaddr __u.__s[2]
  86 #define _a_detach __u.__i[3*__SU+0]
  87 #define _a_sched __u.__i[3*__SU+1]
  88 #define _a_policy __u.__i[3*__SU+2]
  89 #define _a_prio __u.__i[3*__SU+3]
  90 #define _m_type __u.__i[0]
  91 #define _m_lock __u.__vi[1]
  92 #define _m_waiters __u.__vi[2]
  93 #define _m_prev __u.__p[3]
  94 #define _m_next __u.__p[4]
  95 #define _m_count __u.__i[5]
  96 #define _c_shared __u.__p[0]
  97 #define _c_seq __u.__vi[2]
  98 #define _c_waiters __u.__vi[3]
  99 #define _c_clock __u.__i[4]
 100 #define _c_lock __u.__vi[8]
 101 #define _c_head __u.__p[1]
 102 #define _c_tail __u.__p[5]
 103 #define _rw_lock __u.__vi[0]
 104 #define _rw_waiters __u.__vi[1]
 105 #define _rw_shared __u.__i[2]
 106 #define _b_lock __u.__vi[0]
 107 #define _b_waiters __u.__vi[1]
 108 #define _b_limit __u.__i[2]
 109 #define _b_count __u.__vi[3]
 110 #define _b_waiters2 __u.__vi[4]
 111 #define _b_inst __u.__p[3]
 112
 113 #include "pthread_arch.h"
 114
 115 #ifndef CANARY
 116 #define CANARY canary
 117 #endif
 118
 119 #ifndef DTP_OFFSET
 120 #define DTP_OFFSET 0
 121 #endif
 122
 123 #ifndef tls_mod_off_t
 124 #define tls_mod_off_t size_t
 125 #endif
 126
 127 #define SIGTIMER 32
 128 #define SIGCANCEL 33
 129 #define SIGSYNCCALL 34
 130
 131 #define SIGALL_SET ((sigset_t *)(const unsigned long long [2]){ -1,-1 })
 132 #define SIGPT_SET \
 133         ((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \
 134         [sizeof(long)==4] = 3UL<<(32*(sizeof(long)>4)) })
 135 #define SIGTIMER_SET \
 136         ((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \
 137          0x80000000 })
 138
 139 void *__tls_get_addr(tls_mod_off_t *);
 140 hidden void *__tls_get_new(tls_mod_off_t *);
 141 hidden int __init_tp(void *);
 142 hidden void *__copy_tls(unsigned char *);
 143 hidden void __reset_tls();
 144
 145 hidden void __dl_thread_cleanup(void);
 146 hidden void __fork_handler(int);
 147 hidden void __testcancel();
 148 hidden void __do_cleanup_push(struct __ptcb *);
 149 hidden void __do_cleanup_pop(struct __ptcb *);
 150 hidden void __pthread_tsd_run_dtors();
 151
 152 extern hidden volatile int __block_new_threads;
 153 extern hidden volatile size_t __pthread_tsd_size;
 154 extern hidden void *__pthread_tsd_main[];
 155 extern hidden volatile int __aio_fut;
 156
 157 hidden int __clone(int (*)(void *), void *, int, void *, ...);
 158 hidden int __set_thread_area(void *);
 159 hidden int __libc_sigaction(int, const struct sigaction *, struct sigaction *);
 160 hidden void __unmapself(void *, size_t);
 161
 162 hidden int __timedwait(volatile int *, int, clockid_t, const struct timespec *, int);
 163 hidden int __timedwait_cp(volatile int *, int, clockid_t, const struct timespec *, int);
 164 hidden void __wait(volatile int *, volatile int *, int, int);
 165 static inline void __wake(volatile void *addr, int cnt, int priv)
 166 {
 167         if (priv) priv = FUTEX_PRIVATE;
 168         if (cnt<0) cnt = INT_MAX;
 169         __syscall(SYS_futex, addr, FUTEX_WAKE|priv, cnt) != -ENOSYS ||
 170         __syscall(SYS_futex, addr, FUTEX_WAKE, cnt);
 171 }
 172 static inline void __futexwait(volatile void *addr, int val, int priv)
 173 {
 174         if (priv) priv = FUTEX_PRIVATE;
 175         __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS ||
 176         __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0);
 177 }
 178
 179 hidden void __acquire_ptc(void);
 180 hidden void __release_ptc(void);
 181 hidden void __inhibit_ptc(void);
 182
 183 extern hidden size_t __default_stacksize;
 184 extern hidden size_t __default_guardsize;
 185
 186 #define DEFAULT_STACK_SIZE 81920
 187 #define DEFAULT_GUARD_SIZE 4096
 188
 189 #define __ATTRP_C11_THREAD ((void*)(uintptr_t)-1)
 190
 191 #endif