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Comparing libcoro/coro.c (file contents):
Revision 1.40 by root, Sat Nov 8 04:52:01 2008 UTC vs.
Revision 1.57 by root, Mon May 30 02:46:52 2011 UTC

1/* 1/*
2 * Copyright (c) 2001-2008 Marc Alexander Lehmann <schmorp@schmorp.de> 2 * Copyright (c) 2001-2011 Marc Alexander Lehmann <schmorp@schmorp.de>
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without modifica- 4 * Redistribution and use in source and binary forms, with or without modifica-
5 * tion, are permitted provided that the following conditions are met: 5 * tion, are permitted provided that the following conditions are met:
6 * 6 *
7 * 1. Redistributions of source code must retain the above copyright notice, 7 * 1. Redistributions of source code must retain the above copyright notice,
… …
78 78
79static coro_func coro_init_func; 79static coro_func coro_init_func;
80static void *coro_init_arg; 80static void *coro_init_arg;
81static coro_context *new_coro, *create_coro; 81static coro_context *new_coro, *create_coro;
82 82
83/* what we really want to detect here is wether we use a new-enough version of GAS */
84/* with dwarf debug info. instead, check for gcc 3, ELF and GNU/Linux and hope for the best */
85# if __GNUC__ >= 3 && __ELF__ && __linux__
86# define HAVE_CFI 1
87# endif
88
89static void 83static void
90coro_init (void) 84coro_init (void)
91{ 85{
92 volatile coro_func func = coro_init_func; 86 volatile coro_func func = coro_init_func;
93 volatile void *arg = coro_init_arg; 87 volatile void *arg = coro_init_arg;
94 88
95 coro_transfer (new_coro, create_coro); 89 coro_transfer (new_coro, create_coro);
90
91#if __linux && __amd64
92 /* we blindly assume on any __linux with __amd64 we have a new enough gas with .cfi_undefined support */
93 asm (".cfi_undefined rip");
94#endif
96 95
97 func ((void *)arg); 96 func ((void *)arg);
98 97
99 /* the new coro returned. bad. just abort() for now */ 98 /* the new coro returned. bad. just abort() for now */
100 abort (); 99 abort ();
… …
106 105
107/* trampoline signal handler */ 106/* trampoline signal handler */
108static void 107static void
109trampoline (int sig) 108trampoline (int sig)
110{ 109{
111 if (
112 #if _XOPEN_UNIX > 0
113 _setjmp (new_coro->env) 110 if (coro_setjmp (new_coro->env))
114 #else
115 sigsetjmp (new_coro->env, 0)
116 #endif
117 ) {
118 #if HAVE_CFI
119 asm (".cfi_startproc");
120 #endif
121 coro_init (); /* start it */ 111 coro_init (); /* start it */
122 #if HAVE_CFI
123 asm (".cfi_endproc");
124 #endif
125 }
126 else 112 else
127 trampoline_done = 1; 113 trampoline_done = 1;
128} 114}
129 115
130# endif 116# endif
… …
134 asm ( 120 asm (
135 ".text\n" 121 ".text\n"
136 ".globl coro_transfer\n" 122 ".globl coro_transfer\n"
137 ".type coro_transfer, @function\n" 123 ".type coro_transfer, @function\n"
138 "coro_transfer:\n" 124 "coro_transfer:\n"
125 /* windows, of course, gives a shit on the amd64 ABI and uses different registers */
126 /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
139 #if __amd64 127 #if __amd64
140 #define NUM_SAVED 6 128 #define NUM_SAVED 6
141 "\tpush %rbp\n" 129 "\tpush %rbp\n"
142 "\tpush %rbx\n" 130 "\tpush %rbx\n"
143 "\tpush %r12\n" 131 "\tpush %r12\n"
144 "\tpush %r13\n" 132 "\tpush %r13\n"
145 "\tpush %r14\n" 133 "\tpush %r14\n"
146 "\tpush %r15\n" 134 "\tpush %r15\n"
135 #if CORO_WIN_TIB
136 "\tpush %gs:0x0\n"
137 "\tpush %gs:0x8\n"
138 "\tpush %gs:0xc\n"
139 #endif
147 "\tmov %rsp, (%rdi)\n" 140 "\tmov %rsp, (%rdi)\n"
148 "\tmov (%rsi), %rsp\n" 141 "\tmov (%rsi), %rsp\n"
142 #if CORO_WIN_TIB
143 "\tpop %gs:0xc\n"
144 "\tpop %gs:0x8\n"
145 "\tpop %gs:0x0\n"
146 #endif
149 "\tpop %r15\n" 147 "\tpop %r15\n"
150 "\tpop %r14\n" 148 "\tpop %r14\n"
151 "\tpop %r13\n" 149 "\tpop %r13\n"
152 "\tpop %r12\n" 150 "\tpop %r12\n"
153 "\tpop %rbx\n" 151 "\tpop %rbx\n"
… …
156 #define NUM_SAVED 4 154 #define NUM_SAVED 4
157 "\tpush %ebp\n" 155 "\tpush %ebp\n"
158 "\tpush %ebx\n" 156 "\tpush %ebx\n"
159 "\tpush %esi\n" 157 "\tpush %esi\n"
160 "\tpush %edi\n" 158 "\tpush %edi\n"
159 #if CORO_WIN_TIB
160 "\tpush %fs:0\n"
161 "\tpush %fs:4\n"
162 "\tpush %fs:8\n"
163 #endif
161 "\tmov %esp, (%eax)\n" 164 "\tmov %esp, (%eax)\n"
162 "\tmov (%edx), %esp\n" 165 "\tmov (%edx), %esp\n"
166 #if CORO_WIN_TIB
167 "\tpop %fs:8\n"
168 "\tpop %fs:4\n"
169 "\tpop %fs:0\n"
170 #endif
163 "\tpop %edi\n" 171 "\tpop %edi\n"
164 "\tpop %esi\n" 172 "\tpop %esi\n"
165 "\tpop %ebx\n" 173 "\tpop %ebx\n"
166 "\tpop %ebp\n" 174 "\tpop %ebp\n"
167 #else 175 #else
… …
207 perror ("sigaction"); 215 perror ("sigaction");
208 abort (); 216 abort ();
209 } 217 }
210 218
211 /* set the new stack */ 219 /* set the new stack */
212 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 220 nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
213 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 221 nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
214 nstk.ss_flags = 0; 222 nstk.ss_flags = 0;
215 223
216 if (sigaltstack (&nstk, &ostk) < 0) 224 if (sigaltstack (&nstk, &ostk) < 0)
217 { 225 {
218 perror ("sigaltstack"); 226 perror ("sigaltstack");
… …
241 sigaction (SIGUSR2, &osa, 0); 249 sigaction (SIGUSR2, &osa, 0);
242 sigprocmask (SIG_SETMASK, &osig, 0); 250 sigprocmask (SIG_SETMASK, &osig, 0);
243 251
244# elif CORO_LOSER 252# elif CORO_LOSER
245 253
246 setjmp (ctx->env); 254 coro_setjmp (ctx->env);
247 #if __CYGWIN__ 255 #if __CYGWIN__ && __i386
256 ctx->env[8] = (long) coro_init;
248 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 257 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
249 ctx->env[8] = (long)coro_init; 258 #elif __CYGWIN__ && __x86_64
259 ctx->env[7] = (long) coro_init;
260 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
261 #elif defined(__MINGW32__)
262 ctx->env[5] = (long) coro_init;
263 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
250 #elif defined(_M_IX86) 264 #elif defined(_M_IX86)
251 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 265 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
252 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 266 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
253 #elif defined(_M_AMD64) 267 #elif defined(_M_AMD64)
254 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 268 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
255 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 269 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
256 #elif defined(_M_IA64) 270 #elif defined(_M_IA64)
257 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 271 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
258 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 272 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
259 #else 273 #else
260 #error "microsoft libc or architecture not supported" 274 #error "microsoft libc or architecture not supported"
261 #endif 275 #endif
262 276
263# elif CORO_LINUX 277# elif CORO_LINUX
264 278
265 _setjmp (ctx->env); 279 coro_setjmp (ctx->env);
266 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 280 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
267 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 281 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
268 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 282 ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
269 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 283 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
270 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 284 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
271 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); 285 ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long);
272 #elif defined (__GNU_LIBRARY__) && defined (__i386__) 286 #elif defined (__GNU_LIBRARY__) && defined (__i386__)
273 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 287 ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
274 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 288 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
275 #elif defined (__GNU_LIBRARY__) && defined (__amd64__) 289 #elif defined (__GNU_LIBRARY__) && defined (__amd64__)
276 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 290 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
277 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 291 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
278 #else 292 #else
279 #error "linux libc or architecture not supported" 293 #error "linux libc or architecture not supported"
280 #endif 294 #endif
281 295
282# elif CORO_IRIX 296# elif CORO_IRIX
283 297
284 sigsetjmp (ctx->env, 0); 298 coro_setjmp (ctx->env, 0);
285 ctx->env[JB_PC] = (__uint64_t)coro_init; 299 ctx->env[JB_PC] = (__uint64_t)coro_init;
286 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 300 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
287 301
288# elif CORO_ASM 302# elif CORO_ASM
289 303
290 ctx->sp = (volatile void **)(ssize + (char *)sptr); 304 ctx->sp = (void **)(ssize + (char *)sptr);
291 *--ctx->sp = (void *)abort; /* needed for alignment only */ 305 *--ctx->sp = (void *)abort; /* needed for alignment only */
292 *--ctx->sp = (void *)coro_init; 306 *--ctx->sp = (void *)coro_init;
307
308 #if CORO_WIN_TIB
309 *--ctx->sp = 0; /* ExceptionList */
310 *--ctx->sp = (char *)sptr + ssize; /* StackBase */
311 *--ctx->sp = sptr; /* StackLimit */
312 #endif
313
293 ctx->sp -= NUM_SAVED; 314 ctx->sp -= NUM_SAVED;
315 memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
294 316
295# elif CORO_UCONTEXT 317# elif CORO_UCONTEXT
296 318
297 getcontext (&(ctx->uc)); 319 getcontext (&(ctx->uc));
298 320
… …
353void 375void
354coro_transfer (coro_context *prev, coro_context *next) 376coro_transfer (coro_context *prev, coro_context *next)
355{ 377{
356 pthread_cond_signal (&next->cv); 378 pthread_cond_signal (&next->cv);
357 pthread_cond_wait (&prev->cv, &coro_mutex); 379 pthread_cond_wait (&prev->cv, &coro_mutex);
380#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
381 pthread_testcancel ();
382#endif
358} 383}
359 384
360void 385void
361coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) 386coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
362{ 387{
… …
383 args.arg = arg; 408 args.arg = arg;
384 args.self = ctx; 409 args.self = ctx;
385 args.main = &nctx; 410 args.main = &nctx;
386 411
387 pthread_attr_init (&attr); 412 pthread_attr_init (&attr);
413#if __UCLIBC__
414 /* exists, but is borked */
415 /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/
416#else
388 pthread_attr_setstack (&attr, sptr, (size_t)ssize); 417 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
418#endif
389 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); 419 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
390 pthread_create (&ctx->id, &attr, coro_init, &args); 420 pthread_create (&ctx->id, &attr, coro_init, &args);
391 421
392 coro_transfer (args.main, args.self); 422 coro_transfer (args.main, args.self);
393 } 423 }

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