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Comparing libcoro/coro.c (file contents):
Revision 1.39 by root, Sat Nov 8 04:31:28 2008 UTC vs.
Revision 1.60 by root, Mon Jun 13 09:00:15 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,
… …
74# include <stdio.h> 74# include <stdio.h>
75# include <signal.h> 75# include <signal.h>
76# include <unistd.h> 76# include <unistd.h>
77# endif 77# endif
78 78
79static volatile coro_func coro_init_func; 79static coro_func coro_init_func;
80static volatile void *coro_init_arg; 80static void *coro_init_arg;
81static volatile coro_context *new_coro, *create_coro; 81static coro_context *new_coro, *create_coro;
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 82
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 ((coro_context *)new_coro, (coro_context *)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 setjmp (new_coro->env)
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
131 117
132# if CORO_ASM 118# if CORO_ASM
133 119
120 #if _WIN32
121 #define CORO_WIN_TIB 1
122 #endif
123
134 asm ( 124 asm (
135 ".text\n" 125 "\t.text\n"
136 ".globl coro_transfer\n" 126 "\t.globl coro_transfer\n"
137 ".type coro_transfer, @function\n"
138 "coro_transfer:\n" 127 "coro_transfer:\n"
128 /* windows, of course, gives a shit on the amd64 ABI and uses different registers */
129 /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
139 #if __amd64 130 #if __amd64
131 #ifdef WIN32
132 /* TODO: xmm6..15 also would need to be saved. sigh. */
133 #define NUM_SAVED 8
134 "\tpushq %rsi\n"
135 "\tpushq %rdi\n"
136 "\tpushq %rbp\n"
137 "\tpushq %rbx\n"
138 "\tpushq %r12\n"
139 "\tpushq %r13\n"
140 "\tpushq %r14\n"
141 "\tpushq %r15\n"
142 #if CORO_WIN_TIB
143 "\tpushq %fs:0x0\n"
144 "\tpushq %fs:0x8\n"
145 "\tpushq %fs:0xc\n"
146 #endif
147 "\tmovq %rsp, (%rcx)\n"
148 "\tmovq (%rdx), %rsp\n"
149 #if CORO_WIN_TIB
150 "\tpopq %fs:0xc\n"
151 "\tpopq %fs:0x8\n"
152 "\tpopq %fs:0x0\n"
153 #endif
154 "\tpopq %r15\n"
155 "\tpopq %r14\n"
156 "\tpopq %r13\n"
157 "\tpopq %r12\n"
158 "\tpopq %rbx\n"
159 "\tpopq %rbp\n"
160 "\tpopq %rdi\n"
161 "\tpopq %rsi\n"
162 #else
140 #define NUM_SAVED 6 163 #define NUM_SAVED 6
141 "\tpush %rbp\n" 164 "\tpushq %rbp\n"
142 "\tpush %rbx\n" 165 "\tpushq %rbx\n"
143 "\tpush %r12\n" 166 "\tpushq %r12\n"
144 "\tpush %r13\n" 167 "\tpushq %r13\n"
145 "\tpush %r14\n" 168 "\tpushq %r14\n"
146 "\tpush %r15\n" 169 "\tpushq %r15\n"
147 "\tmov %rsp, (%rdi)\n" 170 "\tmovq %rsp, (%rdi)\n"
148 "\tmov (%rsi), %rsp\n" 171 "\tmovq (%rsi), %rsp\n"
149 "\tpop %r15\n" 172 "\tpopq %r15\n"
150 "\tpop %r14\n" 173 "\tpopq %r14\n"
151 "\tpop %r13\n" 174 "\tpopq %r13\n"
152 "\tpop %r12\n" 175 "\tpopq %r12\n"
153 "\tpop %rbx\n" 176 "\tpopq %rbx\n"
154 "\tpop %rbp\n" 177 "\tpopq %rbp\n"
178 #endif
155 #elif __i386 179 #elif __i386
156 #define NUM_SAVED 4 180 #define NUM_SAVED 4
157 "\tpush %ebp\n" 181 "\tpushl %ebp\n"
158 "\tpush %ebx\n" 182 "\tpushl %ebx\n"
159 "\tpush %esi\n" 183 "\tpushl %esi\n"
160 "\tpush %edi\n" 184 "\tpushl %edi\n"
185 #if CORO_WIN_TIB
186 "\tpushl %fs:0\n"
187 "\tpushl %fs:4\n"
188 "\tpushl %fs:8\n"
189 #endif
161 "\tmov %esp, (%eax)\n" 190 "\tmovl %esp, (%eax)\n"
162 "\tmov (%edx), %esp\n" 191 "\tmovl (%edx), %esp\n"
192 #if CORO_WIN_TIB
193 "\tpopl %fs:8\n"
194 "\tpopl %fs:4\n"
195 "\tpopl %fs:0\n"
196 #endif
163 "\tpop %edi\n" 197 "\tpopl %edi\n"
164 "\tpop %esi\n" 198 "\tpopl %esi\n"
165 "\tpop %ebx\n" 199 "\tpopl %ebx\n"
166 "\tpop %ebp\n" 200 "\tpopl %ebp\n"
167 #else 201 #else
168 #error unsupported architecture 202 #error unsupported architecture
169 #endif 203 #endif
170 "\tret\n" 204 "\tret\n"
171 ); 205 );
… …
207 perror ("sigaction"); 241 perror ("sigaction");
208 abort (); 242 abort ();
209 } 243 }
210 244
211 /* set the new stack */ 245 /* set the new stack */
212 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 246 nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
213 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 247 nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
214 nstk.ss_flags = 0; 248 nstk.ss_flags = 0;
215 249
216 if (sigaltstack (&nstk, &ostk) < 0) 250 if (sigaltstack (&nstk, &ostk) < 0)
217 { 251 {
218 perror ("sigaltstack"); 252 perror ("sigaltstack");
… …
241 sigaction (SIGUSR2, &osa, 0); 275 sigaction (SIGUSR2, &osa, 0);
242 sigprocmask (SIG_SETMASK, &osig, 0); 276 sigprocmask (SIG_SETMASK, &osig, 0);
243 277
244# elif CORO_LOSER 278# elif CORO_LOSER
245 279
246 setjmp (ctx->env); 280 coro_setjmp (ctx->env);
247 #if __CYGWIN__ 281 #if __CYGWIN__ && __i386
282 ctx->env[8] = (long) coro_init;
248 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 283 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
249 ctx->env[8] = (long)coro_init; 284 #elif __CYGWIN__ && __x86_64
285 ctx->env[7] = (long) coro_init;
286 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
287 #elif defined(__MINGW32__)
288 ctx->env[5] = (long) coro_init;
289 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
250 #elif defined(_M_IX86) 290 #elif defined(_M_IX86)
251 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 291 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
252 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 292 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
253 #elif defined(_M_AMD64) 293 #elif defined(_M_AMD64)
254 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 294 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
255 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 295 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
256 #elif defined(_M_IA64) 296 #elif defined(_M_IA64)
257 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 297 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
258 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 298 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
259 #else 299 #else
260 #error "microsoft libc or architecture not supported" 300 #error "microsoft libc or architecture not supported"
261 #endif 301 #endif
262 302
263# elif CORO_LINUX 303# elif CORO_LINUX
264 304
265 _setjmp (ctx->env); 305 coro_setjmp (ctx->env);
266 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 306 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
267 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 307 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
268 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 308 ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
269 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 309 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
270 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 310 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
271 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); 311 ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long);
272 #elif defined (__GNU_LIBRARY__) && defined (__i386__) 312 #elif defined (__GNU_LIBRARY__) && defined (__i386__)
273 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 313 ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
274 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 314 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
275 #elif defined (__GNU_LIBRARY__) && defined (__amd64__) 315 #elif defined (__GNU_LIBRARY__) && defined (__amd64__)
276 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 316 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
277 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 317 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
278 #else 318 #else
279 #error "linux libc or architecture not supported" 319 #error "linux libc or architecture not supported"
280 #endif 320 #endif
281 321
282# elif CORO_IRIX 322# elif CORO_IRIX
283 323
284 setjmp (ctx->env); 324 coro_setjmp (ctx->env, 0);
285 ctx->env[JB_PC] = (__uint64_t)coro_init; 325 ctx->env[JB_PC] = (__uint64_t)coro_init;
286 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 326 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
287 327
288# elif CORO_ASM 328# elif CORO_ASM
289 329
290 ctx->sp = (volatile void **)(ssize + (char *)sptr); 330 ctx->sp = (void **)(ssize + (char *)sptr);
291 *--ctx->sp = (void *)abort; /* needed for alignment only */ 331 *--ctx->sp = (void *)abort; /* needed for alignment only */
292 *--ctx->sp = (void *)coro_init; 332 *--ctx->sp = (void *)coro_init;
333
334 #if CORO_WIN_TIB
335 *--ctx->sp = 0; /* ExceptionList */
336 *--ctx->sp = (char *)sptr + ssize; /* StackBase */
337 *--ctx->sp = sptr; /* StackLimit */
338 #endif
339
293 ctx->sp -= NUM_SAVED; 340 ctx->sp -= NUM_SAVED;
341 memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
294 342
295# elif CORO_UCONTEXT 343# elif CORO_UCONTEXT
296 344
297 getcontext (&(ctx->uc)); 345 getcontext (&(ctx->uc));
298 346
… …
306# endif 354# endif
307 355
308 coro_transfer (create_coro, new_coro); 356 coro_transfer (create_coro, new_coro);
309} 357}
310 358
311#endif
312
313/*****************************************************************************/ 359/*****************************************************************************/
314/* pthread backend */ 360/* pthread backend */
315/*****************************************************************************/ 361/*****************************************************************************/
316
317#if CORO_PTHREAD 362#elif CORO_PTHREAD
318 363
319/* this mutex will be locked by the running coroutine */ 364/* this mutex will be locked by the running coroutine */
320pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; 365pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
321 366
322struct coro_init_args 367struct coro_init_args
… …
356void 401void
357coro_transfer (coro_context *prev, coro_context *next) 402coro_transfer (coro_context *prev, coro_context *next)
358{ 403{
359 pthread_cond_signal (&next->cv); 404 pthread_cond_signal (&next->cv);
360 pthread_cond_wait (&prev->cv, &coro_mutex); 405 pthread_cond_wait (&prev->cv, &coro_mutex);
406#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
407 pthread_testcancel ();
408#endif
361} 409}
362 410
363void 411void
364coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) 412coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
365{ 413{
… …
386 args.arg = arg; 434 args.arg = arg;
387 args.self = ctx; 435 args.self = ctx;
388 args.main = &nctx; 436 args.main = &nctx;
389 437
390 pthread_attr_init (&attr); 438 pthread_attr_init (&attr);
439#if __UCLIBC__
440 /* exists, but is borked */
441 /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/
442#else
391 pthread_attr_setstack (&attr, sptr, (size_t)ssize); 443 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
444#endif
392 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); 445 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
393 pthread_create (&ctx->id, &attr, coro_init, &args); 446 pthread_create (&ctx->id, &attr, coro_init, &args);
394 447
395 coro_transfer (args.main, args.self); 448 coro_transfer (args.main, args.self);
396 } 449 }
… …
410 } 463 }
411 464
412 pthread_cond_destroy (&ctx->cv); 465 pthread_cond_destroy (&ctx->cv);
413} 466}
414 467
468#else
469# error unsupported backend
415#endif 470#endif
416 471

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