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 #ifndef __LITEOS__
14 #include "musl_log.h"
15 #endif
16 #include "pthread_arch.h"
17
18 #define pthread __pthread
19 #define TLS_RESERVE_SLOT 15
20
21 struct pthread {
22 /* Part 1 -- these fields may be external or
23 * internal (accessed via asm) ABI. Do not change. */
24 struct pthread *self;
25 #ifndef TLS_ABOVE_TP
26 uintptr_t *dtv;
27 #endif
28 struct pthread *prev, *next; /* non-ABI */
29 uintptr_t sysinfo;
30 #ifndef TLS_ABOVE_TP
31 #ifdef CANARY_PAD
32 uintptr_t canary_pad;
33 #endif
34 uintptr_t canary;
35 #endif
36
37 /* Part 2 -- implementation details, non-ABI. */
38 int tid;
39 int pid;
40 int proc_tid;
41 int errno_val;
42 int by_vfork;
43 volatile int detach_state;
44 #ifdef FEATURE_PTHREAD_CANCEL
45 volatile int cancel;
46 volatile unsigned char canceldisable, cancelasync;
47 #endif
48 unsigned char tsd_used:1;
49 unsigned char dlerror_flag:1;
50 unsigned char *map_base;
51 size_t map_size;
52 void *stack;
53 size_t stack_size;
54 size_t guard_size;
55 void *result;
56 struct __ptcb *cancelbuf;
57 void **tsd;
58 struct {
59 volatile void *volatile head;
60 long off;
61 volatile void *volatile pending;
62 } robust_list;
63 int h_errno_val;
64 volatile int timer_id;
65 locale_t locale;
66 volatile int killlock[1];
67 char *dlerror_buf;
68 void *stdio_locks;
69 #ifdef RESERVE_SIGNAL_STACK
70 void *signal_stack;
71 #endif
72
73 /* musl doesn't support libc using tls, so we reserve some slots here for gwp_asan to use. */
74 struct {
75 uint32_t random_state;
76 uint32_t next_sample_counter : 31;
77 char recursive_guard : 1;
78 } gwp_asan_tls;
79
80 #ifdef CXA_THREAD_USE_TLS
81 struct thread_local_dtor {
82 void (*func) (void *);
83 void *arg;
84 void *dso_handle; // Used to located dso.
85 struct thread_local_dtor* next;
86 } *thread_local_dtors;
87 #endif
88
89 /* Part 3 -- the positions of these fields relative to
90 * the end of the structure is external and internal ABI. */
91 #ifdef TLS_ABOVE_TP
92 /* The tls_slots will be accessed by kernel, so don't use it.
93 * To solve the problem that the kernel isn't synchronized with the musl,
94 * so make pre/post reserved slots for musl.
95 * pre-reserved : tls_slots[0-4]
96 * kernel used : tls_slots[5-9]
97 * post-reserved : tls_slot[10-14] */
98 void *tls_slots[TLS_RESERVE_SLOT];
99 uintptr_t canary;
100 uintptr_t *dtv;
101 #endif
102 };
103
104 enum {
105 DT_EXITED = 0,
106 DT_EXITING,
107 DT_JOINABLE,
108 DT_DETACHED,
109 };
110
111 #define __SU (sizeof(size_t)/sizeof(int))
112
113 #define _a_stacksize __u.__s[0]
114 #define _a_guardsize __u.__s[1]
115 #define _a_stackaddr __u.__s[2]
116 #define _a_detach __u.__i[3*__SU+0]
117 #define _a_sched __u.__i[3*__SU+1]
118 #define _a_policy __u.__i[3*__SU+2]
119 #define _a_prio __u.__i[3*__SU+3]
120 #ifdef __LITEOS_A__
121 #define _a_runtime __u.__i[3*__SU+3]
122 #define _a_deadline __u.__i[3*__SU+4]
123 #define _a_period __u.__i[3*__SU+5]
124 #endif
125 #define _m_type __u.__i[0]
126 #define _m_lock __u.__vi[1]
127 #define _m_waiters __u.__vi[2]
128 #define _m_prev __u.__p[3]
129 #define _m_next __u.__p[4]
130 #define _m_clock __u.__i[4]
131 #define _m_count __u.__i[5]
132 #define _c_shared __u.__p[0]
133 #define _c_seq __u.__vi[2]
134 #define _c_waiters __u.__vi[3]
135 #define _c_clock __u.__i[4]
136 #define _c_lock __u.__vi[8]
137 #define _c_head __u.__p[1]
138 #define _c_tail __u.__p[5]
139 #define _rw_lock __u.__vi[0]
140 #define _rw_waiters __u.__vi[1]
141 #define _rw_shared __u.__i[2]
142 #define _rw_clock __u.__i[4]
143 #define _b_lock __u.__vi[0]
144 #define _b_waiters __u.__vi[1]
145 #define _b_limit __u.__i[2]
146 #define _b_count __u.__vi[3]
147 #define _b_waiters2 __u.__vi[4]
148 #define _b_inst __u.__p[3]
149
150 #ifndef TP_OFFSET
151 #define TP_OFFSET 0
152 #endif
153
154 #ifndef DTP_OFFSET
155 #define DTP_OFFSET 0
156 #endif
157
158 #ifdef TLS_ABOVE_TP
159 #define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) + TP_OFFSET)
160 #ifndef __LITEOS_A__
161 #define __pthread_self() ((pthread_t)(__get_tp() - sizeof(struct __pthread) - TP_OFFSET))
162 #endif
163 #else
164 #define TP_ADJ(p) (p)
165 #ifndef __LITEOS_A__
166 #define __pthread_self() ((pthread_t)__get_tp())
167 #endif
168 #endif
169
170 #ifndef tls_mod_off_t
171 #define tls_mod_off_t size_t
172 #endif
173
174 #define SIGTIMER 32
175 #define SIGCANCEL 33
176 #define SIGSYNCCALL 34
177
178 #define SIGALL_SET ((sigset_t *)(const unsigned long long [2]){ -1,-1 })
179 #define SIGPT_SET \
180 ((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \
181 [sizeof(long)==4] = 3UL<<(32*(sizeof(long)>4)) })
182 #define SIGTIMER_SET \
183 ((sigset_t *)(const unsigned long [_NSIG/8/sizeof(long)]){ \
184 0x80000000 })
185
186 void *__tls_get_addr(tls_mod_off_t *);
187 hidden int __init_tp(void *);
188 hidden void *__copy_tls(unsigned char *);
189 hidden void __reset_tls();
190
191 hidden void __membarrier_init(void);
192 hidden void __dl_thread_cleanup(void);
193 hidden void __testcancel();
194 hidden void __do_cleanup_push(struct __ptcb *);
195 hidden void __do_cleanup_pop(struct __ptcb *);
196 hidden void __pthread_tsd_run_dtors();
197
198 hidden void __pthread_key_delete_synccall(void (*)(void *), void *);
199 hidden int __pthread_key_delete_impl(pthread_key_t);
200
201 extern hidden volatile size_t __pthread_tsd_size;
202 extern hidden void *__pthread_tsd_main[];
203 extern hidden volatile int __eintr_valid_flag;
204
205 hidden int __clone(int (*)(void *), void *, int, void *, ...);
206 hidden int __set_thread_area(void *);
207 hidden int __libc_sigaction(int, const struct sigaction *, struct sigaction *);
208 hidden void __unmapself(void *, size_t);
209
210 hidden int __timedwait(volatile int *, int, clockid_t, const struct timespec *, int);
211 hidden int __timedwait_cp(volatile int *, int, clockid_t, const struct timespec *, int);
212 hidden void __wait(volatile int *, volatile int *, int, int);
__wake(volatile void *addr, int cnt, int priv)213 static inline void __wake(volatile void *addr, int cnt, int priv)
214 {
215 if (priv) priv = FUTEX_PRIVATE;
216 if (cnt<0) cnt = INT_MAX;
217 __syscall(SYS_futex, addr, FUTEX_WAKE|priv, cnt) != -ENOSYS ||
218 __syscall(SYS_futex, addr, FUTEX_WAKE, cnt);
219 }
__futexwait(volatile void *addr, int val, int priv)220 static inline void __futexwait(volatile void *addr, int val, int priv)
221 {
222 if (priv) priv = FUTEX_PRIVATE;
223 #ifdef __LITEOS_A__
224 __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0xffffffffu) != -ENOSYS ||
225 __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0xffffffffu);
226 #else
227 __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS ||
228 __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0);
229 #endif
230 }
231
232 #define MS_PER_S 1000
233 #define US_PER_S 1000000
__timespec_from_ms(struct timespec* ts, const unsigned ms)234 static inline void __timespec_from_ms(struct timespec* ts, const unsigned ms)
235 {
236 if (ts == NULL) {
237 return;
238 }
239 ts->tv_sec = ms / MS_PER_S;
240 ts->tv_nsec = (ms % MS_PER_S) * US_PER_S;
241 }
242
243 #define NS_PER_S 1000000000
__absolute_timespec_from_timespec(struct timespec *abs_ts, const struct timespec *ts, clockid_t clock)244 static inline void __absolute_timespec_from_timespec(struct timespec *abs_ts,
245 const struct timespec *ts, clockid_t clock)
246 {
247 if (abs_ts == NULL || ts == NULL) {
248 return;
249 }
250 clock_gettime(clock, abs_ts);
251 abs_ts->tv_sec += ts->tv_sec;
252 abs_ts->tv_nsec += ts->tv_nsec;
253 if (abs_ts->tv_nsec >= NS_PER_S) {
254 abs_ts->tv_nsec -= NS_PER_S;
255 abs_ts->tv_sec++;
256 }
257 }
258
__is_mutex_destroyed(int mutex_type)259 static inline int __is_mutex_destroyed(int mutex_type)
260 {
261 return mutex_type == PTHREAD_MUTEX_DESTROYED;
262 }
263
__handle_using_destroyed_mutex(pthread_mutex_t *mutex, const char *function_name)264 static inline void __handle_using_destroyed_mutex(pthread_mutex_t *mutex, const char *function_name)
265 {
266 #ifndef __LITEOS__
267 MUSL_LOGE("Fortify Error: %{public}s called on a destroyed mutex (%{public}p)", function_name, mutex);
268 #endif
269 }
270
271 #ifdef RESERVE_SIGNAL_STACK
272 hidden void pthread_reserve_signal_stack();
273 hidden void pthread_release_signal_stack();
274 #endif
275
276 hidden void __acquire_ptc(void);
277 hidden void __release_ptc(void);
278 hidden void __inhibit_ptc(void);
279
280 hidden void __tl_lock(void);
281 hidden void __tl_unlock(void);
282 hidden void __tl_sync(pthread_t);
283 hidden int get_tl_lock_count(void);
284 hidden int get_tl_lock_waiters(void);
285 hidden int get_tl_lock_tid_fail(void);
286 hidden int get_tl_lock_count_tid(void);
287 hidden int get_tl_lock_count_fail(void);
288 hidden int get_thread_list_lock_pre_unlock(void);
289 hidden struct pthread* __pthread_list_find(pthread_t, const char*);
290
291 extern hidden volatile int __thread_list_lock;
292
293 extern hidden volatile int __abort_lock[1];
294
295 extern hidden unsigned __default_stacksize;
296 extern hidden unsigned __default_guardsize;
297
298 #ifdef TARGET_STACK_SIZE
299 #define DEFAULT_STACK_SIZE TARGET_STACK_SIZE
300 #else
301 #define DEFAULT_STACK_SIZE 131072
302 #endif
303
304 #ifdef TARGET_GUARD_SIZE
305 #define DEFAULT_GUARD_SIZE TARGET_GUARD_SIZE
306 #else
307 #define DEFAULT_GUARD_SIZE 8192
308 #endif
309
310 #define DEFAULT_STACK_MAX (8<<20)
311 #define DEFAULT_GUARD_MAX (1<<20)
312
313 #define __ATTRP_C11_THREAD ((void*)(uintptr_t)-1)
314
315 #ifdef __LITEOS_A__
316 #define MUSL_TYPE_THREAD (-1)
317 #define MUSL_TYPE_PROCESS (0)
318
319 #define PTHREAD_MUTEX_TYPE_MASK 3
320 #define PTHREAD_PRIORITY_LOWEST 31
321 hidden int __thread_clone(int (*func)(void *), int flags, struct pthread *thread, unsigned char *sp);
322 #endif
323
324 #endif
325