summaryrefslogtreecommitdiff
path: root/src/internal/pthread_impl.h
blob: 7a25b88ebd6ca27acae2fbba2f675287e946b262 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
#ifndef _PTHREAD_IMPL_H
#define _PTHREAD_IMPL_H

#include <pthread.h>
#include <signal.h>
#include <errno.h>
#include <limits.h>
#include <sys/mman.h>
#include "libc.h"
#include "syscall.h"
#include "atomic.h"
#include "futex.h"

#define pthread __pthread

struct pthread {
	/* Part 1 -- these fields may be external or
	 * internal (accessed via asm) ABI. Do not change. */
	struct pthread *self;
	uintptr_t *dtv;
	void *unused1, *unused2;
	uintptr_t sysinfo;
	uintptr_t canary, canary2;

	/* Part 2 -- implementation details, non-ABI. */
	int tid;
	int errno_val;
	volatile int detach_state;
	volatile int cancel;
	volatile unsigned char canceldisable, cancelasync;
	unsigned char tsd_used:1;
	unsigned char unblock_cancel:1;
	unsigned char dlerror_flag:1;
	unsigned char *map_base;
	size_t map_size;
	void *stack;
	size_t stack_size;
	size_t guard_size;
	void *start_arg;
	void *(*start)(void *);
	void *result;
	struct __ptcb *cancelbuf;
	void **tsd;
	struct {
		volatile void *volatile head;
		long off;
		volatile void *volatile pending;
	} robust_list;
	volatile int timer_id;
	locale_t locale;
	volatile int killlock[1];
	char *dlerror_buf;
	void *stdio_locks;

	/* Part 3 -- the positions of these fields relative to
	 * the end of the structure is external and internal ABI. */
	uintptr_t canary_at_end;
	uintptr_t *dtv_copy;
};

struct start_sched_args {
	void *start_arg;
	void *(*start_fn)(void *);
	sigset_t mask;
	pthread_attr_t *attr;
	volatile int futex;
};

enum {
	DT_EXITED = 0,
	DT_EXITING,
	DT_JOINABLE,
	DT_DETACHED,
	DT_DYNAMIC,
};

struct __timer {
	int timerid;
	pthread_t thread;
};

#define __SU (sizeof(size_t)/sizeof(int))

#define _a_stacksize __u.__s[0]
#define _a_guardsize __u.__s[1]
#define _a_stackaddr __u.__s[2]
#define _a_detach __u.__i[3*__SU+0]
#define _a_sched __u.__i[3*__SU+1]
#define _a_policy __u.__i[3*__SU+2]
#define _a_prio __u.__i[3*__SU+3]
#define _m_type __u.__i[0]
#define _m_lock __u.__vi[1]
#define _m_waiters __u.__vi[2]
#define _m_prev __u.__p[3]
#define _m_next __u.__p[4]
#define _m_count __u.__i[5]
#define _c_shared __u.__p[0]
#define _c_seq __u.__vi[2]
#define _c_waiters __u.__vi[3]
#define _c_clock __u.__i[4]
#define _c_lock __u.__vi[8]
#define _c_head __u.__p[1]
#define _c_tail __u.__p[5]
#define _rw_lock __u.__vi[0]
#define _rw_waiters __u.__vi[1]
#define _rw_shared __u.__i[2]
#define _b_lock __u.__vi[0]
#define _b_waiters __u.__vi[1]
#define _b_limit __u.__i[2]
#define _b_count __u.__vi[3]
#define _b_waiters2 __u.__vi[4]
#define _b_inst __u.__p[3]

#include "pthread_arch.h"

#ifndef CANARY
#define CANARY canary
#endif

#ifndef DTP_OFFSET
#define DTP_OFFSET 0
#endif

#ifndef tls_mod_off_t
#define tls_mod_off_t size_t
#endif

#define SIGTIMER 32
#define SIGCANCEL 33
#define SIGSYNCCALL 34

#define SIGALL_SET ((sigset_t *)(const unsigned long long [2]){ -1,-1 })
#define SIGPT_SET \
	((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \
	[sizeof(long)==4] = 3UL<<(32*(sizeof(long)>4)) })
#define SIGTIMER_SET \
	((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \
	 0x80000000 })

void *__tls_get_addr(tls_mod_off_t *);
hidden void *__tls_get_new(tls_mod_off_t *);
hidden int __init_tp(void *);
hidden void *__copy_tls(unsigned char *);
hidden void __reset_tls();

hidden void __dl_thread_cleanup(void);
hidden void __testcancel();
hidden void __do_cleanup_push(struct __ptcb *);
hidden void __do_cleanup_pop(struct __ptcb *);
hidden void __pthread_tsd_run_dtors();

hidden void __pthread_key_delete_synccall(void (*)(void *), void *);
hidden int __pthread_key_delete_impl(pthread_key_t);

extern hidden volatile int __block_new_threads;
extern hidden volatile size_t __pthread_tsd_size;
extern hidden void *__pthread_tsd_main[];
extern hidden volatile int __aio_fut;

hidden int __clone(int (*)(void *), void *, int, void *, ...);
hidden int __set_thread_area(void *);
hidden int __libc_sigaction(int, const struct sigaction *, struct sigaction *);
hidden void __unmapself(void *, size_t);

hidden int __timedwait(volatile int *, int, clockid_t, const struct timespec *, int);
hidden int __timedwait_cp(volatile int *, int, clockid_t, const struct timespec *, int);
hidden void __wait(volatile int *, volatile int *, int, int);
static inline void __wake(volatile void *addr, int cnt, int priv)
{
	if (priv) priv = FUTEX_PRIVATE;
	if (cnt<0) cnt = INT_MAX;
	__syscall(SYS_futex, addr, FUTEX_WAKE|priv, cnt) != -ENOSYS ||
	__syscall(SYS_futex, addr, FUTEX_WAKE, cnt);
}
static inline void __futexwait(volatile void *addr, int val, int priv)
{
	if (priv) priv = FUTEX_PRIVATE;
	__syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS ||
	__syscall(SYS_futex, addr, FUTEX_WAIT, val, 0);
}

hidden void __acquire_ptc(void);
hidden void __release_ptc(void);
hidden void __inhibit_ptc(void);

extern hidden unsigned __default_stacksize;
extern hidden unsigned __default_guardsize;

#define DEFAULT_STACK_SIZE 131072
#define DEFAULT_GUARD_SIZE 8192

#define DEFAULT_STACK_MAX (8<<20)
#define DEFAULT_GUARD_MAX (1<<20)

#define __ATTRP_C11_THREAD ((void*)(uintptr_t)-1)

#endif