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, |
8 | * this list of conditions and the following disclaimer. |
8 | * this list of conditions and the following disclaimer. |
9 | * |
9 | * |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
12 | * documentation and/or other materials provided with the distribution. |
13 | * |
13 | * |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
17 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
17 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
… | |
… | |
40 | |
40 | |
41 | #include "coro.h" |
41 | #include "coro.h" |
42 | |
42 | |
43 | #include <string.h> |
43 | #include <string.h> |
44 | |
44 | |
|
|
45 | /*****************************************************************************/ |
|
|
46 | /* ucontext/setjmp/asm backends */ |
|
|
47 | /*****************************************************************************/ |
|
|
48 | #if CORO_UCONTEXT || CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
49 | |
|
|
50 | # if CORO_UCONTEXT |
|
|
51 | # include <stddef.h> |
|
|
52 | # endif |
|
|
53 | |
45 | #if !defined(STACK_ADJUST_PTR) |
54 | # if !defined(STACK_ADJUST_PTR) |
|
|
55 | # if __sgi |
46 | /* IRIX is decidedly NON-unix */ |
56 | /* IRIX is decidedly NON-unix */ |
47 | # if __sgi |
|
|
48 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
57 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
49 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
58 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
50 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
59 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
51 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
60 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
52 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
61 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
53 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
62 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
54 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
63 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
55 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
64 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
56 | # else |
65 | # else |
57 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
66 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
58 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
67 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
59 | # endif |
68 | # endif |
60 | #endif |
69 | # endif |
61 | |
|
|
62 | #if CORO_UCONTEXT |
|
|
63 | # include <stddef.h> |
|
|
64 | #endif |
|
|
65 | |
|
|
66 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
67 | |
70 | |
68 | # include <stdlib.h> |
71 | # include <stdlib.h> |
69 | |
72 | |
70 | # if CORO_SJLJ |
73 | # if CORO_SJLJ |
71 | # include <stdio.h> |
74 | # include <stdio.h> |
72 | # include <signal.h> |
75 | # include <signal.h> |
73 | # include <unistd.h> |
76 | # include <unistd.h> |
74 | # endif |
77 | # endif |
75 | |
78 | |
76 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
77 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
78 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
79 | |
|
|
80 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
|
|
81 | /* instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
|
|
82 | # if __GNUC__ >= 3 && __ELF__ && __linux__ |
|
|
83 | # define HAVE_CFI 1 |
|
|
84 | # endif |
|
|
85 | |
82 | |
86 | static void |
83 | static void |
87 | coro_init (void) |
84 | coro_init (void) |
88 | { |
85 | { |
89 | volatile coro_func func = coro_init_func; |
86 | volatile coro_func func = coro_init_func; |
90 | volatile void *arg = coro_init_arg; |
87 | volatile void *arg = coro_init_arg; |
91 | |
88 | |
92 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
89 | coro_transfer (new_coro, create_coro); |
|
|
90 | |
|
|
91 | #if __GCC_HAVE_DWARF2_CFI_ASM && __amd64 |
|
|
92 | asm (".cfi_undefined rip"); |
|
|
93 | #endif |
93 | |
94 | |
94 | func ((void *)arg); |
95 | func ((void *)arg); |
95 | |
96 | |
96 | /* the new coro returned. bad. just abort() for now */ |
97 | /* the new coro returned. bad. just abort() for now */ |
97 | abort (); |
98 | abort (); |
98 | } |
99 | } |
99 | |
100 | |
100 | # if CORO_SJLJ |
101 | # if CORO_SJLJ |
101 | |
102 | |
102 | static volatile int trampoline_count; |
103 | static volatile int trampoline_done; |
103 | |
104 | |
104 | /* trampoline signal handler */ |
105 | /* trampoline signal handler */ |
105 | static void |
106 | static void |
106 | trampoline (int sig) |
107 | trampoline (int sig) |
107 | { |
108 | { |
108 | if (setjmp (((coro_context *)new_coro)->env)) |
109 | if (coro_setjmp (new_coro->env)) |
|
|
110 | coro_init (); /* start it */ |
|
|
111 | else |
|
|
112 | trampoline_done = 1; |
|
|
113 | } |
|
|
114 | |
|
|
115 | # endif |
|
|
116 | |
|
|
117 | # if CORO_ASM |
|
|
118 | |
|
|
119 | #if _WIN32 || __CYGWIN__ |
|
|
120 | #define CORO_WIN_TIB 1 |
|
|
121 | #endif |
|
|
122 | |
|
|
123 | asm ( |
|
|
124 | "\t.text\n" |
|
|
125 | #if _WIN32 || __CYGWIN__ |
|
|
126 | "\t.globl _coro_transfer\n" |
|
|
127 | "_coro_transfer:\n" |
|
|
128 | #else |
|
|
129 | "\t.globl coro_transfer\n" |
|
|
130 | "coro_transfer:\n" |
|
|
131 | #endif |
|
|
132 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
|
|
133 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
|
|
134 | #if __amd64 |
|
|
135 | |
|
|
136 | #if _WIN32 || __CYGWIN__ |
|
|
137 | #define NUM_SAVED 29 |
|
|
138 | "\tsubq $168, %rsp\t" /* one dummy qword to improve alignment */ |
|
|
139 | "\tmovaps %xmm6, (%rsp)\n" |
|
|
140 | "\tmovaps %xmm7, 16(%rsp)\n" |
|
|
141 | "\tmovaps %xmm8, 32(%rsp)\n" |
|
|
142 | "\tmovaps %xmm9, 48(%rsp)\n" |
|
|
143 | "\tmovaps %xmm10, 64(%rsp)\n" |
|
|
144 | "\tmovaps %xmm11, 80(%rsp)\n" |
|
|
145 | "\tmovaps %xmm12, 96(%rsp)\n" |
|
|
146 | "\tmovaps %xmm13, 112(%rsp)\n" |
|
|
147 | "\tmovaps %xmm14, 128(%rsp)\n" |
|
|
148 | "\tmovaps %xmm15, 144(%rsp)\n" |
|
|
149 | "\tpushq %rsi\n" |
|
|
150 | "\tpushq %rdi\n" |
|
|
151 | "\tpushq %rbp\n" |
|
|
152 | "\tpushq %rbx\n" |
|
|
153 | "\tpushq %r12\n" |
|
|
154 | "\tpushq %r13\n" |
|
|
155 | "\tpushq %r14\n" |
|
|
156 | "\tpushq %r15\n" |
|
|
157 | #if CORO_WIN_TIB |
|
|
158 | "\tpushq %fs:0x0\n" |
|
|
159 | "\tpushq %fs:0x8\n" |
|
|
160 | "\tpushq %fs:0xc\n" |
|
|
161 | #endif |
|
|
162 | "\tmovq %rsp, (%rcx)\n" |
|
|
163 | "\tmovq (%rdx), %rsp\n" |
|
|
164 | #if CORO_WIN_TIB |
|
|
165 | "\tpopq %fs:0xc\n" |
|
|
166 | "\tpopq %fs:0x8\n" |
|
|
167 | "\tpopq %fs:0x0\n" |
|
|
168 | #endif |
|
|
169 | "\tpopq %r15\n" |
|
|
170 | "\tpopq %r14\n" |
|
|
171 | "\tpopq %r13\n" |
|
|
172 | "\tpopq %r12\n" |
|
|
173 | "\tpopq %rbx\n" |
|
|
174 | "\tpopq %rbp\n" |
|
|
175 | "\tpopq %rdi\n" |
|
|
176 | "\tpopq %rsi\n" |
|
|
177 | "\tmovaps (%rsp), %xmm6\n" |
|
|
178 | "\tmovaps 16(%rsp), %xmm7\n" |
|
|
179 | "\tmovaps 32(%rsp), %xmm8\n" |
|
|
180 | "\tmovaps 48(%rsp), %xmm9\n" |
|
|
181 | "\tmovaps 64(%rsp), %xmm10\n" |
|
|
182 | "\tmovaps 80(%rsp), %xmm11\n" |
|
|
183 | "\tmovaps 96(%rsp), %xmm12\n" |
|
|
184 | "\tmovaps 112(%rsp), %xmm13\n" |
|
|
185 | "\tmovaps 128(%rsp), %xmm14\n" |
|
|
186 | "\tmovaps 144(%rsp), %xmm15\n" |
|
|
187 | "\taddq $168, %rsp\n" |
|
|
188 | #else |
|
|
189 | #define NUM_SAVED 6 |
|
|
190 | "\tpushq %rbp\n" |
|
|
191 | "\tpushq %rbx\n" |
|
|
192 | "\tpushq %r12\n" |
|
|
193 | "\tpushq %r13\n" |
|
|
194 | "\tpushq %r14\n" |
|
|
195 | "\tpushq %r15\n" |
|
|
196 | "\tmovq %rsp, (%rdi)\n" |
|
|
197 | "\tmovq (%rsi), %rsp\n" |
|
|
198 | "\tpopq %r15\n" |
|
|
199 | "\tpopq %r14\n" |
|
|
200 | "\tpopq %r13\n" |
|
|
201 | "\tpopq %r12\n" |
|
|
202 | "\tpopq %rbx\n" |
|
|
203 | "\tpopq %rbp\n" |
|
|
204 | #endif |
|
|
205 | "\tpopq %rcx\n" |
|
|
206 | "\tjmpq *%rcx\n" |
|
|
207 | |
|
|
208 | #elif __i386 |
|
|
209 | |
|
|
210 | #define NUM_SAVED 4 |
|
|
211 | "\tpushl %ebp\n" |
|
|
212 | "\tpushl %ebx\n" |
|
|
213 | "\tpushl %esi\n" |
|
|
214 | "\tpushl %edi\n" |
|
|
215 | #if CORO_WIN_TIB |
|
|
216 | #undef NUM_SAVED |
|
|
217 | #define NUM_SAVED 7 |
|
|
218 | "\tpushl %fs:0\n" |
|
|
219 | "\tpushl %fs:4\n" |
|
|
220 | "\tpushl %fs:8\n" |
|
|
221 | #endif |
|
|
222 | "\tmovl %esp, (%eax)\n" |
|
|
223 | "\tmovl (%edx), %esp\n" |
|
|
224 | #if CORO_WIN_TIB |
|
|
225 | "\tpopl %fs:8\n" |
|
|
226 | "\tpopl %fs:4\n" |
|
|
227 | "\tpopl %fs:0\n" |
|
|
228 | #endif |
|
|
229 | "\tpopl %edi\n" |
|
|
230 | "\tpopl %esi\n" |
|
|
231 | "\tpopl %ebx\n" |
|
|
232 | "\tpopl %ebp\n" |
|
|
233 | "\tpopl %ecx\n" |
|
|
234 | "\tjmpl *%ecx\n" |
|
|
235 | |
|
|
236 | #else |
|
|
237 | #error unsupported architecture |
|
|
238 | #endif |
|
|
239 | ); |
|
|
240 | |
|
|
241 | # endif |
|
|
242 | |
|
|
243 | void |
|
|
244 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
|
245 | { |
|
|
246 | coro_context nctx; |
|
|
247 | # if CORO_SJLJ |
|
|
248 | stack_t ostk, nstk; |
|
|
249 | struct sigaction osa, nsa; |
|
|
250 | sigset_t nsig, osig; |
|
|
251 | # endif |
|
|
252 | |
|
|
253 | if (!coro) |
|
|
254 | return; |
|
|
255 | |
|
|
256 | coro_init_func = coro; |
|
|
257 | coro_init_arg = arg; |
|
|
258 | |
|
|
259 | new_coro = ctx; |
|
|
260 | create_coro = &nctx; |
|
|
261 | |
|
|
262 | # if CORO_SJLJ |
|
|
263 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
|
|
264 | |
|
|
265 | sigemptyset (&nsig); |
|
|
266 | sigaddset (&nsig, SIGUSR2); |
|
|
267 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
|
|
268 | |
|
|
269 | nsa.sa_handler = trampoline; |
|
|
270 | sigemptyset (&nsa.sa_mask); |
|
|
271 | nsa.sa_flags = SA_ONSTACK; |
|
|
272 | |
|
|
273 | if (sigaction (SIGUSR2, &nsa, &osa)) |
109 | { |
274 | { |
110 | # if HAVE_CFI |
275 | perror ("sigaction"); |
111 | asm (".cfi_startproc"); |
276 | abort (); |
112 | # endif |
|
|
113 | coro_init (); /* start it */ |
|
|
114 | # if HAVE_CFI |
|
|
115 | asm (".cfi_endproc"); |
|
|
116 | # endif |
|
|
117 | } |
277 | } |
|
|
278 | |
|
|
279 | /* set the new stack */ |
|
|
280 | nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */ |
|
|
281 | nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize); |
|
|
282 | nstk.ss_flags = 0; |
|
|
283 | |
|
|
284 | if (sigaltstack (&nstk, &ostk) < 0) |
|
|
285 | { |
|
|
286 | perror ("sigaltstack"); |
|
|
287 | abort (); |
|
|
288 | } |
|
|
289 | |
|
|
290 | trampoline_done = 0; |
|
|
291 | kill (getpid (), SIGUSR2); |
|
|
292 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
|
|
293 | |
|
|
294 | while (!trampoline_done) |
|
|
295 | sigsuspend (&nsig); |
|
|
296 | |
|
|
297 | sigaltstack (0, &nstk); |
|
|
298 | nstk.ss_flags = SS_DISABLE; |
|
|
299 | if (sigaltstack (&nstk, 0) < 0) |
|
|
300 | perror ("sigaltstack"); |
|
|
301 | |
|
|
302 | sigaltstack (0, &nstk); |
|
|
303 | if (~nstk.ss_flags & SS_DISABLE) |
|
|
304 | abort (); |
|
|
305 | |
|
|
306 | if (~ostk.ss_flags & SS_DISABLE) |
|
|
307 | sigaltstack (&ostk, 0); |
|
|
308 | |
|
|
309 | sigaction (SIGUSR2, &osa, 0); |
|
|
310 | sigprocmask (SIG_SETMASK, &osig, 0); |
|
|
311 | |
|
|
312 | # elif CORO_LOSER |
|
|
313 | |
|
|
314 | coro_setjmp (ctx->env); |
|
|
315 | #if __CYGWIN__ && __i386 |
|
|
316 | ctx->env[8] = (long) coro_init; |
|
|
317 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
|
|
318 | #elif __CYGWIN__ && __x86_64 |
|
|
319 | ctx->env[7] = (long) coro_init; |
|
|
320 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
|
|
321 | #elif defined __MINGW32__ |
|
|
322 | ctx->env[5] = (long) coro_init; |
|
|
323 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
|
|
324 | #elif defined _M_IX86 |
|
|
325 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
|
|
326 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
327 | #elif defined _M_AMD64 |
|
|
328 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
|
|
329 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
|
|
330 | #elif defined _M_IA64 |
|
|
331 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
|
|
332 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
118 | else |
333 | #else |
119 | trampoline_count++; |
334 | #error "microsoft libc or architecture not supported" |
120 | } |
|
|
121 | |
|
|
122 | # endif |
335 | #endif |
123 | |
336 | |
|
|
337 | # elif CORO_LINUX |
|
|
338 | |
|
|
339 | coro_setjmp (ctx->env); |
|
|
340 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
|
|
341 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
|
|
342 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
343 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
|
|
344 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
|
|
345 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
|
|
346 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
|
|
347 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
|
|
348 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
|
|
349 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
|
|
350 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
|
|
351 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
|
|
352 | #else |
|
|
353 | #error "linux libc or architecture not supported" |
|
|
354 | #endif |
|
|
355 | |
|
|
356 | # elif CORO_IRIX |
|
|
357 | |
|
|
358 | coro_setjmp (ctx->env, 0); |
|
|
359 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
360 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
361 | |
|
|
362 | # elif CORO_ASM |
|
|
363 | |
|
|
364 | ctx->sp = (void **)(ssize + (char *)sptr); |
|
|
365 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
|
|
366 | *--ctx->sp = (void *)coro_init; |
|
|
367 | |
|
|
368 | #if CORO_WIN_TIB |
|
|
369 | *--ctx->sp = 0; /* ExceptionList */ |
|
|
370 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
|
|
371 | *--ctx->sp = sptr; /* StackLimit */ |
|
|
372 | #endif |
|
|
373 | |
|
|
374 | ctx->sp -= NUM_SAVED; |
|
|
375 | memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED); |
|
|
376 | |
|
|
377 | # elif CORO_UCONTEXT |
|
|
378 | |
|
|
379 | getcontext (&(ctx->uc)); |
|
|
380 | |
|
|
381 | ctx->uc.uc_link = 0; |
|
|
382 | ctx->uc.uc_stack.ss_sp = sptr; |
|
|
383 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
|
|
384 | ctx->uc.uc_stack.ss_flags = 0; |
|
|
385 | |
|
|
386 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
|
|
387 | |
124 | #endif |
388 | # endif |
125 | |
389 | |
126 | #if CORO_ASM |
390 | coro_transfer (create_coro, new_coro); |
|
|
391 | } |
127 | |
392 | |
128 | asm ( |
393 | /*****************************************************************************/ |
129 | ".text\n" |
394 | /* pthread backend */ |
130 | ".globl coro_transfer\n" |
395 | /*****************************************************************************/ |
131 | ".type coro_transfer, @function\n" |
|
|
132 | "coro_transfer:\n" |
|
|
133 | # if __amd64 |
|
|
134 | # define NUM_SAVED 6 |
|
|
135 | "\tpush %rbp\n" |
|
|
136 | "\tpush %rbx\n" |
|
|
137 | "\tpush %r12\n" |
|
|
138 | "\tpush %r13\n" |
|
|
139 | "\tpush %r14\n" |
|
|
140 | "\tpush %r15\n" |
|
|
141 | "\tmov %rsp, (%rdi)\n" |
|
|
142 | "\tmov (%rsi), %rsp\n" |
|
|
143 | "\tpop %r15\n" |
|
|
144 | "\tpop %r14\n" |
|
|
145 | "\tpop %r13\n" |
|
|
146 | "\tpop %r12\n" |
|
|
147 | "\tpop %rbx\n" |
|
|
148 | "\tpop %rbp\n" |
|
|
149 | # elif __i386 |
|
|
150 | # define NUM_SAVED 4 |
|
|
151 | "\tpush %ebp\n" |
|
|
152 | "\tpush %ebx\n" |
|
|
153 | "\tpush %esi\n" |
|
|
154 | "\tpush %edi\n" |
|
|
155 | "\tmov %esp, (%eax)\n" |
|
|
156 | "\tmov (%edx), %esp\n" |
|
|
157 | "\tpop %edi\n" |
|
|
158 | "\tpop %esi\n" |
|
|
159 | "\tpop %ebx\n" |
|
|
160 | "\tpop %ebp\n" |
|
|
161 | # else |
|
|
162 | # error unsupported architecture |
|
|
163 | # endif |
|
|
164 | "\tret\n" |
|
|
165 | ); |
|
|
166 | |
|
|
167 | #endif |
|
|
168 | |
|
|
169 | #if CORO_PTHREAD |
396 | #elif CORO_PTHREAD |
170 | |
397 | |
171 | /* this mutex will be locked by the running coroutine */ |
398 | /* this mutex will be locked by the running coroutine */ |
172 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
399 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
173 | |
400 | |
174 | struct coro_init_args |
401 | struct coro_init_args |
… | |
… | |
186 | { |
413 | { |
187 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
414 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
188 | } |
415 | } |
189 | |
416 | |
190 | static void * |
417 | static void * |
191 | trampoline (void *args_) |
418 | coro_init (void *args_) |
192 | { |
419 | { |
193 | struct coro_init_args *args = (struct coro_init_args *)args_; |
420 | struct coro_init_args *args = (struct coro_init_args *)args_; |
194 | coro_func func = args->func; |
421 | coro_func func = args->func; |
195 | void *arg = args->arg; |
422 | void *arg = args->arg; |
196 | |
423 | |
… | |
… | |
208 | void |
435 | void |
209 | coro_transfer (coro_context *prev, coro_context *next) |
436 | coro_transfer (coro_context *prev, coro_context *next) |
210 | { |
437 | { |
211 | pthread_cond_signal (&next->cv); |
438 | pthread_cond_signal (&next->cv); |
212 | pthread_cond_wait (&prev->cv, &coro_mutex); |
439 | pthread_cond_wait (&prev->cv, &coro_mutex); |
|
|
440 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
|
|
441 | pthread_testcancel (); |
|
|
442 | #endif |
|
|
443 | } |
|
|
444 | |
|
|
445 | void |
|
|
446 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
|
447 | { |
|
|
448 | static coro_context nctx; |
|
|
449 | static int once; |
|
|
450 | |
|
|
451 | if (!once) |
|
|
452 | { |
|
|
453 | once = 1; |
|
|
454 | |
|
|
455 | pthread_mutex_lock (&coro_mutex); |
|
|
456 | pthread_cond_init (&nctx.cv, 0); |
|
|
457 | null_tid = pthread_self (); |
|
|
458 | } |
|
|
459 | |
|
|
460 | pthread_cond_init (&ctx->cv, 0); |
|
|
461 | |
|
|
462 | if (coro) |
|
|
463 | { |
|
|
464 | pthread_attr_t attr; |
|
|
465 | struct coro_init_args args; |
|
|
466 | |
|
|
467 | args.func = coro; |
|
|
468 | args.arg = arg; |
|
|
469 | args.self = ctx; |
|
|
470 | args.main = &nctx; |
|
|
471 | |
|
|
472 | pthread_attr_init (&attr); |
|
|
473 | #if __UCLIBC__ |
|
|
474 | /* exists, but is borked */ |
|
|
475 | /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ |
|
|
476 | #elif __CYGWIN__ |
|
|
477 | /* POSIX, not here */ |
|
|
478 | pthread_attr_setstacksize (&attr, (size_t)ssize); |
|
|
479 | #else |
|
|
480 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
|
481 | #endif |
|
|
482 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
|
|
483 | pthread_create (&ctx->id, &attr, coro_init, &args); |
|
|
484 | |
|
|
485 | coro_transfer (args.main, args.self); |
|
|
486 | } |
|
|
487 | else |
|
|
488 | ctx->id = null_tid; |
213 | } |
489 | } |
214 | |
490 | |
215 | void |
491 | void |
216 | coro_destroy (coro_context *ctx) |
492 | coro_destroy (coro_context *ctx) |
217 | { |
493 | { |
… | |
… | |
224 | } |
500 | } |
225 | |
501 | |
226 | pthread_cond_destroy (&ctx->cv); |
502 | pthread_cond_destroy (&ctx->cv); |
227 | } |
503 | } |
228 | |
504 | |
229 | #endif |
505 | /*****************************************************************************/ |
|
|
506 | /* fiber backend */ |
|
|
507 | /*****************************************************************************/ |
|
|
508 | #elif CORO_FIBER |
230 | |
509 | |
231 | /* initialize a machine state */ |
510 | #define WIN32_LEAN_AND_MEAN |
|
|
511 | #include <windows.h> |
|
|
512 | |
|
|
513 | #include <stdio.h>//D |
|
|
514 | VOID CALLBACK |
|
|
515 | coro_init (PVOID arg) |
|
|
516 | { |
|
|
517 | coro_context *ctx = (coro_context *)arg; |
|
|
518 | |
|
|
519 | ctx->coro (ctx->arg); |
|
|
520 | } |
|
|
521 | |
|
|
522 | void |
|
|
523 | coro_transfer (coro_context *prev, coro_context *next) |
|
|
524 | { |
|
|
525 | if (!prev->fiber) |
|
|
526 | { |
|
|
527 | prev->fiber = GetCurrentFiber (); |
|
|
528 | |
|
|
529 | if (prev->fiber == 0 || prev->fiber == (void *)0x1e00) |
|
|
530 | prev->fiber = ConvertThreadToFiber (0); |
|
|
531 | } |
|
|
532 | |
|
|
533 | SwitchToFiber (next->fiber); |
|
|
534 | } |
|
|
535 | |
232 | void |
536 | void |
233 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
537 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
234 | { |
538 | { |
235 | #if CORO_UCONTEXT |
539 | ctx->fiber = 0; |
|
|
540 | ctx->coro = coro; |
|
|
541 | ctx->arg = arg; |
236 | |
542 | |
237 | if (!coro) |
543 | if (!coro) |
238 | return; |
544 | return; |
239 | |
545 | |
240 | getcontext (&(ctx->uc)); |
546 | ctx->fiber = CreateFiber (ssize, coro_init, ctx); |
|
|
547 | } |
241 | |
548 | |
242 | ctx->uc.uc_link = 0; |
549 | void |
243 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
550 | coro_destroy (coro_context *ctx) |
244 | ctx->uc.uc_stack.ss_size = (size_t)STACK_ADJUST_SIZE (sptr,ssize); |
551 | { |
245 | ctx->uc.uc_stack.ss_flags = 0; |
552 | DeleteFiber (ctx->fiber); |
246 | |
553 | } |
247 | makecontext (&(ctx->uc), (void (*)())coro, 1, arg); |
|
|
248 | |
|
|
249 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
250 | |
|
|
251 | # if CORO_SJLJ |
|
|
252 | stack_t ostk, nstk; |
|
|
253 | struct sigaction osa, nsa; |
|
|
254 | sigset_t nsig, osig; |
|
|
255 | # endif |
|
|
256 | coro_context nctx; |
|
|
257 | |
|
|
258 | if (!coro) |
|
|
259 | return; |
|
|
260 | |
|
|
261 | coro_init_func = coro; |
|
|
262 | coro_init_arg = arg; |
|
|
263 | |
|
|
264 | new_coro = ctx; |
|
|
265 | create_coro = &nctx; |
|
|
266 | |
|
|
267 | # if CORO_SJLJ |
|
|
268 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
|
|
269 | |
|
|
270 | sigemptyset (&nsig); |
|
|
271 | sigaddset (&nsig, SIGUSR2); |
|
|
272 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
|
|
273 | |
|
|
274 | nsa.sa_handler = trampoline; |
|
|
275 | sigemptyset (&nsa.sa_mask); |
|
|
276 | nsa.sa_flags = SA_ONSTACK; |
|
|
277 | |
|
|
278 | if (sigaction (SIGUSR2, &nsa, &osa)) |
|
|
279 | { |
|
|
280 | perror ("sigaction"); |
|
|
281 | abort (); |
|
|
282 | } |
|
|
283 | |
|
|
284 | /* set the new stack */ |
|
|
285 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
|
|
286 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
|
|
287 | nstk.ss_flags = 0; |
|
|
288 | |
|
|
289 | if (sigaltstack (&nstk, &ostk) < 0) |
|
|
290 | { |
|
|
291 | perror ("sigaltstack"); |
|
|
292 | abort (); |
|
|
293 | } |
|
|
294 | |
|
|
295 | trampoline_count = 0; |
|
|
296 | kill (getpid (), SIGUSR2); |
|
|
297 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
|
|
298 | |
|
|
299 | while (!trampoline_count) |
|
|
300 | sigsuspend (&nsig); |
|
|
301 | |
|
|
302 | sigaltstack (0, &nstk); |
|
|
303 | nstk.ss_flags = SS_DISABLE; |
|
|
304 | if (sigaltstack (&nstk, 0) < 0) |
|
|
305 | perror ("sigaltstack"); |
|
|
306 | |
|
|
307 | sigaltstack (0, &nstk); |
|
|
308 | if (~nstk.ss_flags & SS_DISABLE) |
|
|
309 | abort (); |
|
|
310 | |
|
|
311 | if (~ostk.ss_flags & SS_DISABLE) |
|
|
312 | sigaltstack (&ostk, 0); |
|
|
313 | |
|
|
314 | sigaction (SIGUSR2, &osa, 0); |
|
|
315 | |
|
|
316 | sigprocmask (SIG_SETMASK, &osig, 0); |
|
|
317 | |
|
|
318 | # elif CORO_LOSER |
|
|
319 | |
|
|
320 | setjmp (ctx->env); |
|
|
321 | #if __CYGWIN__ |
|
|
322 | ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); |
|
|
323 | ctx->env[8] = (long)coro_init; |
|
|
324 | #elif defined(_M_IX86) |
|
|
325 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
|
|
326 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
327 | #elif defined(_M_AMD64) |
|
|
328 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
|
|
329 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
330 | #elif defined(_M_IA64) |
|
|
331 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
|
|
332 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
333 | #else |
|
|
334 | # error "microsoft libc or architecture not supported" |
|
|
335 | #endif |
|
|
336 | |
|
|
337 | # elif CORO_LINUX |
|
|
338 | |
|
|
339 | _setjmp (ctx->env); |
|
|
340 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
|
|
341 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
342 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
343 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
|
|
344 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
|
|
345 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); |
|
|
346 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
|
|
347 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
|
|
348 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
|
|
349 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
|
|
350 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
351 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
|
|
352 | #else |
|
|
353 | # error "linux libc or architecture not supported" |
|
|
354 | #endif |
|
|
355 | |
|
|
356 | # elif CORO_IRIX |
|
|
357 | |
|
|
358 | setjmp (ctx->env); |
|
|
359 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
360 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
361 | |
|
|
362 | # elif CORO_ASM |
|
|
363 | |
|
|
364 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
|
|
365 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
|
|
366 | *--ctx->sp = (void *)coro_init; |
|
|
367 | ctx->sp -= NUM_SAVED; |
|
|
368 | |
|
|
369 | # endif |
|
|
370 | |
|
|
371 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
|
|
372 | |
|
|
373 | # elif CORO_PTHREAD |
|
|
374 | |
|
|
375 | static coro_context nctx; |
|
|
376 | static int once; |
|
|
377 | |
|
|
378 | if (!once) |
|
|
379 | { |
|
|
380 | once = 1; |
|
|
381 | |
|
|
382 | pthread_mutex_lock (&coro_mutex); |
|
|
383 | pthread_cond_init (&nctx.cv, 0); |
|
|
384 | null_tid = pthread_self (); |
|
|
385 | } |
|
|
386 | |
|
|
387 | pthread_cond_init (&ctx->cv, 0); |
|
|
388 | |
|
|
389 | if (coro) |
|
|
390 | { |
|
|
391 | pthread_attr_t attr; |
|
|
392 | struct coro_init_args args; |
|
|
393 | |
|
|
394 | args.func = coro; |
|
|
395 | args.arg = arg; |
|
|
396 | args.self = ctx; |
|
|
397 | args.main = &nctx; |
|
|
398 | |
|
|
399 | pthread_attr_init (&attr); |
|
|
400 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
|
401 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
|
|
402 | pthread_create (&ctx->id, &attr, trampoline, &args); |
|
|
403 | |
|
|
404 | coro_transfer (args.main, args.self); |
|
|
405 | } |
|
|
406 | else |
|
|
407 | ctx->id = null_tid; |
|
|
408 | |
554 | |
409 | #else |
555 | #else |
410 | # error unsupported backend |
556 | # error unsupported backend |
411 | #endif |
557 | #endif |
412 | } |
|
|
413 | |
558 | |