[ViewVC] Diff of: cvs/libcoro/coro.c

Comparing libcoro/coro.c (file contents):
Revision 1.61 by root, Sun Jul 3 10:51:42 2011 UTC vs.
Revision 1.69 by root, Fri Aug 26 10:27:12 2016 UTC

…		…
1	/*	1	/*
2	* Copyright (c) 2001-2011 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,
38	* go to Ralf S. Engelschall <rse@engelschall.com>.	38	* go to Ralf S. Engelschall <rse@engelschall.com>.
39	*/	39	*/
40		40
41	#include "coro.h"	41	#include "coro.h"
42		42
		43	#include <stddef.h>
43	#include <string.h>	44	#include <string.h>
44		45
45	/*****************************************************************************/	46	/*****************************************************************************/
46	/* ucontext/setjmp/asm backends */	47	/* ucontext/setjmp/asm backends */
47	/*****************************************************************************/	48	/*****************************************************************************/
…		…
114		115
115	# endif	116	# endif
116		117
117	# if CORO_ASM	118	# if CORO_ASM
118		119
119	#if _WIN32	120	#if __arm__ && \
		121	(defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
		122	\|\| defined __ARM_ARCH_7R__ \|\| defined __ARM_ARCH_7M__ \
		123	\|\| __ARM_ARCH == 7)
		124	#define CORO_ARM 1
		125	#endif
		126
		127	#if _WIN32 \|\| __CYGWIN__
120	#define CORO_WIN_TIB 1	128	#define CORO_WIN_TIB 1
121	#endif	129	#endif
122		130
123	asm (	131	asm (
124	"\t.text\n"	132	"\t.text\n"
		133	#if _WIN32 \|\| __CYGWIN__
		134	"\t.globl _coro_transfer\n"
		135	"_coro_transfer:\n"
		136	#else
125	"\t.globl coro_transfer\n"	137	"\t.globl coro_transfer\n"
126	"coro_transfer:\n"	138	"coro_transfer:\n"
		139	#endif
127	/* windows, of course, gives a shit on the amd64 ABI and uses different registers */	140	/* windows, of course, gives a shit on the amd64 ABI and uses different registers */
128	/* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */	141	/* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
129	#if __amd64	142	#if __amd64
130	#ifdef WIN32	143
131	/* TODO: xmm6..15 also would need to be saved. sigh. */	144	#if _WIN32 \|\| __CYGWIN__
132	#define NUM_SAVED 8	145	#define NUM_SAVED 29
		146	"\tsubq $168, %rsp\t" /* one dummy qword to improve alignment */
		147	"\tmovaps %xmm6, (%rsp)\n"
		148	"\tmovaps %xmm7, 16(%rsp)\n"
		149	"\tmovaps %xmm8, 32(%rsp)\n"
		150	"\tmovaps %xmm9, 48(%rsp)\n"
		151	"\tmovaps %xmm10, 64(%rsp)\n"
		152	"\tmovaps %xmm11, 80(%rsp)\n"
		153	"\tmovaps %xmm12, 96(%rsp)\n"
		154	"\tmovaps %xmm13, 112(%rsp)\n"
		155	"\tmovaps %xmm14, 128(%rsp)\n"
		156	"\tmovaps %xmm15, 144(%rsp)\n"
133	"\tpushq %rsi\n"	157	"\tpushq %rsi\n"
134	"\tpushq %rdi\n"	158	"\tpushq %rdi\n"
135	"\tpushq %rbp\n"	159	"\tpushq %rbp\n"
136	"\tpushq %rbx\n"	160	"\tpushq %rbx\n"
137	"\tpushq %r12\n"	161	"\tpushq %r12\n"
…		…
156	"\tpopq %r12\n"	180	"\tpopq %r12\n"
157	"\tpopq %rbx\n"	181	"\tpopq %rbx\n"
158	"\tpopq %rbp\n"	182	"\tpopq %rbp\n"
159	"\tpopq %rdi\n"	183	"\tpopq %rdi\n"
160	"\tpopq %rsi\n"	184	"\tpopq %rsi\n"
		185	"\tmovaps (%rsp), %xmm6\n"
		186	"\tmovaps 16(%rsp), %xmm7\n"
		187	"\tmovaps 32(%rsp), %xmm8\n"
		188	"\tmovaps 48(%rsp), %xmm9\n"
		189	"\tmovaps 64(%rsp), %xmm10\n"
		190	"\tmovaps 80(%rsp), %xmm11\n"
		191	"\tmovaps 96(%rsp), %xmm12\n"
		192	"\tmovaps 112(%rsp), %xmm13\n"
		193	"\tmovaps 128(%rsp), %xmm14\n"
		194	"\tmovaps 144(%rsp), %xmm15\n"
		195	"\taddq $168, %rsp\n"
161	#else	196	#else
162	#define NUM_SAVED 6	197	#define NUM_SAVED 6
163	"\tpushq %rbp\n"	198	"\tpushq %rbp\n"
164	"\tpushq %rbx\n"	199	"\tpushq %rbx\n"
165	"\tpushq %r12\n"	200	"\tpushq %r12\n"
…		…
173	"\tpopq %r13\n"	208	"\tpopq %r13\n"
174	"\tpopq %r12\n"	209	"\tpopq %r12\n"
175	"\tpopq %rbx\n"	210	"\tpopq %rbx\n"
176	"\tpopq %rbp\n"	211	"\tpopq %rbp\n"
177	#endif	212	#endif
		213	"\tpopq %rcx\n"
		214	"\tjmpq *%rcx\n"
		215
178	#elif __i386	216	#elif __i386__
		217
179	#define NUM_SAVED 4	218	#define NUM_SAVED 4
180	"\tpushl %ebp\n"	219	"\tpushl %ebp\n"
181	"\tpushl %ebx\n"	220	"\tpushl %ebx\n"
182	"\tpushl %esi\n"	221	"\tpushl %esi\n"
183	"\tpushl %edi\n"	222	"\tpushl %edi\n"
184	#if CORO_WIN_TIB	223	#if CORO_WIN_TIB
		224	#undef NUM_SAVED
		225	#define NUM_SAVED 7
185	"\tpushl %fs:0\n"	226	"\tpushl %fs:0\n"
186	"\tpushl %fs:4\n"	227	"\tpushl %fs:4\n"
187	"\tpushl %fs:8\n"	228	"\tpushl %fs:8\n"
188	#endif	229	#endif
189	"\tmovl %esp, (%eax)\n"	230	"\tmovl %esp, (%eax)\n"
…		…
195	#endif	236	#endif
196	"\tpopl %edi\n"	237	"\tpopl %edi\n"
197	"\tpopl %esi\n"	238	"\tpopl %esi\n"
198	"\tpopl %ebx\n"	239	"\tpopl %ebx\n"
199	"\tpopl %ebp\n"	240	"\tpopl %ebp\n"
		241	"\tpopl %ecx\n"
		242	"\tjmpl *%ecx\n"
		243
		244	#elif CORO_ARM /* untested, what about thumb, neon, iwmmxt? */
		245
		246	#if __ARM_PCS_VFP
		247	"\tvpush {d8-d15}\n"
		248	#define NUM_SAVED (9 + 8 * 2)
		249	#else
		250	#define NUM_SAVED 9
		251	#endif
		252	"\tpush {r4-r11,lr}\n"
		253	"\tstr sp, [r0]\n"
		254	"\tldr sp, [r1]\n"
		255	"\tpop {r4-r11,lr}\n"
		256	#if __ARM_PCS_VFP
		257	"\tvpop {d8-d15}\n"
		258	#endif
		259	"\tmov r15, lr\n"
		260
		261	#elif __mips__ && 0 /* untested, 32 bit only */
		262
		263	#define NUM_SAVED (12 + 8 * 2)
		264	/* TODO: n64/o64, lw=>ld */
		265
		266	"\t.set nomips16\n"
		267	"\t.frame $sp,112,$31\n"
		268	#if __mips_soft_float
		269	"\taddiu $sp,$sp,-44\n"
		270	#else
		271	"\taddiu $sp,$sp,-112\n"
		272	"\ts.d $f30,88($sp)\n"
		273	"\ts.d $f28,80($sp)\n"
		274	"\ts.d $f26,72($sp)\n"
		275	"\ts.d $f24,64($sp)\n"
		276	"\ts.d $f22,56($sp)\n"
		277	"\ts.d $f20,48($sp)\n"
		278	#endif
		279	"\tsw $28,40($sp)\n"
		280	"\tsw $31,36($sp)\n"
		281	"\tsw $fp,32($sp)\n"
		282	"\tsw $23,28($sp)\n"
		283	"\tsw $22,24($sp)\n"
		284	"\tsw $21,20($sp)\n"
		285	"\tsw $20,16($sp)\n"
		286	"\tsw $19,12($sp)\n"
		287	"\tsw $18,8($sp)\n"
		288	"\tsw $17,4($sp)\n"
		289	"\tsw $16,0($sp)\n"
		290	"\tsw $sp,0($4)\n"
		291	"\tlw $sp,0($5)\n"
		292	#if !__mips_soft_float
		293	"\tl.d $f30,88($sp)\n"
		294	"\tl.d $f28,80($sp)\n"
		295	"\tl.d $f26,72($sp)\n"
		296	"\tl.d $f24,64($sp)\n"
		297	"\tl.d $f22,56($sp)\n"
		298	"\tl.d $f20,48($sp)\n"
		299	#endif
		300	"\tlw $28,40($sp)\n"
		301	"\tlw $31,36($sp)\n"
		302	"\tlw $fp,32($sp)\n"
		303	"\tlw $23,28($sp)\n"
		304	"\tlw $22,24($sp)\n"
		305	"\tlw $21,20($sp)\n"
		306	"\tlw $20,16($sp)\n"
		307	"\tlw $19,12($sp)\n"
		308	"\tlw $18,8($sp)\n"
		309	"\tlw $17,4($sp)\n"
		310	"\tlw $16,0($sp)\n"
		311	"\tj $31\n"
		312	#if __mips_soft_float
		313	"\taddiu $sp,$sp,44\n"
		314	#else
		315	"\taddiu $sp,$sp,112\n"
		316	#endif
		317
200	#else	318	#else
201	#error unsupported architecture	319	#error unsupported architecture
202	#endif	320	#endif
203	"\tret\n"
204	);	321	);
205		322
206	# endif	323	# endif
207		324
208	void	325	void
209	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, long ssize)	326	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, size_t ssize)
210	{	327	{
211	coro_context nctx;	328	coro_context nctx;
212	# if CORO_SJLJ	329	# if CORO_SJLJ
213	stack_t ostk, nstk;	330	stack_t ostk, nstk;
214	struct sigaction osa, nsa;	331	struct sigaction osa, nsa;
…		…
275	sigprocmask (SIG_SETMASK, &osig, 0);	392	sigprocmask (SIG_SETMASK, &osig, 0);
276		393
277	# elif CORO_LOSER	394	# elif CORO_LOSER
278		395
279	coro_setjmp (ctx->env);	396	coro_setjmp (ctx->env);
280	#if __CYGWIN__ && __i386	397	#if __CYGWIN__ && __i386__
281	ctx->env[8] = (long) coro_init;	398	ctx->env[8] = (long) coro_init;
282	ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);	399	ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
283	#elif __CYGWIN__ && __x86_64	400	#elif __CYGWIN__ && __x86_64__
284	ctx->env[7] = (long) coro_init;	401	ctx->env[7] = (long) coro_init;
285	ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);	402	ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
286	#elif defined(__MINGW32__)	403	#elif defined __MINGW32__
287	ctx->env[5] = (long) coro_init;	404	ctx->env[5] = (long) coro_init;
288	ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);	405	ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
289	#elif defined(_M_IX86)	406	#elif defined _M_IX86
290	((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;	407	((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
291	((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);	408	((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
292	#elif defined(_M_AMD64)	409	#elif defined _M_AMD64
293	((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;	410	((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
294	((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);	411	((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
295	#elif defined(_M_IA64)	412	#elif defined _M_IA64
296	((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;	413	((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
297	((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);	414	((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
298	#else	415	#else
299	#error "microsoft libc or architecture not supported"	416	#error "microsoft libc or architecture not supported"
300	#endif	417	#endif
…		…
309	ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;	426	ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
310	ctx->env[0].__jmpbuf[0].__sp = (int ) ((char )sptr + ssize) - sizeof (long);	427	ctx->env[0].__jmpbuf[0].__sp = (int ) ((char )sptr + ssize) - sizeof (long);
311	#elif defined (__GNU_LIBRARY__) && defined (__i386__)	428	#elif defined (__GNU_LIBRARY__) && defined (__i386__)
312	ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;	429	ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
313	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);	430	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);
314	#elif defined (__GNU_LIBRARY__) && defined (__amd64__)	431	#elif defined (__GNU_LIBRARY__) && defined (__x86_64__)
315	ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;	432	ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
316	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);	433	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);
317	#else	434	#else
318	#error "linux libc or architecture not supported"	435	#error "linux libc or architecture not supported"
319	#endif	436	#endif
…		…
324	ctx->env[JB_PC] = (__uint64_t)coro_init;	441	ctx->env[JB_PC] = (__uint64_t)coro_init;
325	ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);	442	ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
326		443
327	# elif CORO_ASM	444	# elif CORO_ASM
328		445
		446	#if __i386__ \|\| __x86_64__
329	ctx->sp = (void *)(ssize + (char )sptr);	447	ctx->sp = (void *)(ssize + (char )sptr);
330	--ctx->sp = (void )abort; /* needed for alignment only */	448	--ctx->sp = (void )abort; /* needed for alignment only */
331	--ctx->sp = (void )coro_init;	449	--ctx->sp = (void )coro_init;
332
333	#if CORO_WIN_TIB	450	#if CORO_WIN_TIB
334	--ctx->sp = 0; / ExceptionList */	451	--ctx->sp = 0; / ExceptionList */
335	--ctx->sp = (char )sptr + ssize; /* StackBase */	452	--ctx->sp = (char )sptr + ssize; /* StackBase */
336	--ctx->sp = sptr; / StackLimit */	453	--ctx->sp = sptr; / StackLimit */
		454	#endif
		455	#elif CORO_ARM
		456	/* return address stored in lr register, don't push anything */
		457	#else
		458	#error unsupported architecture
337	#endif	459	#endif
338		460
339	ctx->sp -= NUM_SAVED;	461	ctx->sp -= NUM_SAVED;
340	memset (ctx->sp, 0, sizeof (ctx->sp) NUM_SAVED);	462	memset (ctx->sp, 0, sizeof (ctx->sp) NUM_SAVED);
		463
		464	#if __i386__ \|\| __x86_64__
		465	/* done already */
		466	#elif CORO_ARM
		467	ctx->sp[0] = coro; /* r4 */
		468	ctx->sp[1] = arg; /* r5 */
		469	ctx->sp[8] = (char )coro_init; / lr */
		470	#else
		471	#error unsupported architecture
		472	#endif
341		473
342	# elif CORO_UCONTEXT	474	# elif CORO_UCONTEXT
343		475
344	getcontext (&(ctx->uc));	476	getcontext (&(ctx->uc));
345		477
…		…
406	pthread_testcancel ();	538	pthread_testcancel ();
407	#endif	539	#endif
408	}	540	}
409		541
410	void	542	void
411	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, long ssize)	543	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, size_t ssize)
412	{	544	{
413	static coro_context nctx;	545	static coro_context nctx;
414	static int once;	546	static int once;
415		547
416	if (!once)	548	if (!once)
…		…
436		568
437	pthread_attr_init (&attr);	569	pthread_attr_init (&attr);
438	#if __UCLIBC__	570	#if __UCLIBC__
439	/* exists, but is borked */	571	/* exists, but is borked */
440	/pthread_attr_setstacksize (&attr, (size_t)ssize);/	572	/pthread_attr_setstacksize (&attr, (size_t)ssize);/
		573	#elif __CYGWIN__
		574	/* POSIX, not here */
		575	pthread_attr_setstacksize (&attr, (size_t)ssize);
441	#else	576	#else
442	pthread_attr_setstack (&attr, sptr, (size_t)ssize);	577	pthread_attr_setstack (&attr, sptr, (size_t)ssize);
443	#endif	578	#endif
444	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);	579	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
445	pthread_create (&ctx->id, &attr, coro_init, &args);	580	pthread_create (&ctx->id, &attr, coro_init, &args);
…		…
462	}	597	}
463		598
464	pthread_cond_destroy (&ctx->cv);	599	pthread_cond_destroy (&ctx->cv);
465	}	600	}
466		601
		602	/*****************************************************************************/
		603	/* fiber backend */
		604	/*****************************************************************************/
		605	#elif CORO_FIBER
		606
		607	#define WIN32_LEAN_AND_MEAN
		608	#if _WIN32_WINNT < 0x0400
		609	#undef _WIN32_WINNT
		610	#define _WIN32_WINNT 0x0400
		611	#endif
		612	#include <windows.h>
		613
		614	VOID CALLBACK
		615	coro_init (PVOID arg)
		616	{
		617	coro_context ctx = (coro_context )arg;
		618
		619	ctx->coro (ctx->arg);
		620	}
		621
		622	void
		623	coro_transfer (coro_context prev, coro_context next)
		624	{
		625	if (!prev->fiber)
		626	{
		627	prev->fiber = GetCurrentFiber ();
		628
		629	if (prev->fiber == 0 \|\| prev->fiber == (void *)0x1e00)
		630	prev->fiber = ConvertThreadToFiber (0);
		631	}
		632
		633	SwitchToFiber (next->fiber);
		634	}
		635
		636	void
		637	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, size_t ssize)
		638	{
		639	ctx->fiber = 0;
		640	ctx->coro = coro;
		641	ctx->arg = arg;
		642
		643	if (!coro)
		644	return;
		645
		646	ctx->fiber = CreateFiber (ssize, coro_init, ctx);
		647	}
		648
		649	void
		650	coro_destroy (coro_context *ctx)
		651	{
		652	DeleteFiber (ctx->fiber);
		653	}
		654
467	#else	655	#else
468	# error unsupported backend	656	#error unsupported backend
		657	#endif
		658
		659	/*****************************************************************************/
		660	/* stack management */
		661	/*****************************************************************************/
		662	#if CORO_STACKALLOC
		663
		664	#include <stdlib.h>
		665
		666	#ifndef _WIN32
		667	# include <unistd.h>
		668	#endif
		669
		670	#if CORO_USE_VALGRIND
		671	# include <valgrind/valgrind.h>
		672	#endif
		673
		674	#if _POSIX_MAPPED_FILES
		675	# include <sys/mman.h>
		676	# define CORO_MMAP 1
		677	# ifndef MAP_ANONYMOUS
		678	# ifdef MAP_ANON
		679	# define MAP_ANONYMOUS MAP_ANON
		680	# else
		681	# undef CORO_MMAP
		682	# endif
469	#endif	683	# endif
		684	# include <limits.h>
		685	#else
		686	# undef CORO_MMAP
		687	#endif
470		688
		689	#if _POSIX_MEMORY_PROTECTION
		690	# ifndef CORO_GUARDPAGES
		691	# define CORO_GUARDPAGES 4
		692	# endif
		693	#else
		694	# undef CORO_GUARDPAGES
		695	#endif
		696
		697	#if !CORO_MMAP
		698	# undef CORO_GUARDPAGES
		699	#endif
		700
		701	#if !__i386__ && !__x86_64__ && !__powerpc__ && !__arm__ && !__aarch64__ && !__m68k__ && !__alpha__ && !__mips__ && !__sparc64__
		702	# undef CORO_GUARDPAGES
		703	#endif
		704
		705	#ifndef CORO_GUARDPAGES
		706	# define CORO_GUARDPAGES 0
		707	#endif
		708
		709	#if !PAGESIZE
		710	#if !CORO_MMAP
		711	#define PAGESIZE 4096
		712	#else
		713	static size_t
		714	coro_pagesize (void)
		715	{
		716	static size_t pagesize;
		717
		718	if (!pagesize)
		719	pagesize = sysconf (_SC_PAGESIZE);
		720
		721	return pagesize;
		722	}
		723
		724	#define PAGESIZE coro_pagesize ()
		725	#endif
		726	#endif
		727
		728	int
		729	coro_stack_alloc (struct coro_stack *stack, unsigned int size)
		730	{
		731	if (!size)
		732	size = 256 * 1024;
		733
		734	stack->sptr = 0;
		735	stack->ssze = ((size_t)size * sizeof (void ) + PAGESIZE - 1) / PAGESIZE PAGESIZE;
		736
		737	#if CORO_FIBER
		738
		739	stack->sptr = (void *)stack;
		740	return 1;
		741
		742	#else
		743
		744	size_t ssze = stack->ssze + CORO_GUARDPAGES * PAGESIZE;
		745	void *base;
		746
		747	#if CORO_MMAP
		748	/* mmap supposedly does allocate-on-write for us */
		749	base = mmap (0, ssze, PROT_READ \| PROT_WRITE \| PROT_EXEC, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
		750
		751	if (base == (void *)-1)
		752	{
		753	/* some systems don't let us have executable heap */
		754	/* we assume they won't need executable stack in that case */
		755	base = mmap (0, ssze, PROT_READ \| PROT_WRITE, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
		756
		757	if (base == (void *)-1)
		758	return 0;
		759	}
		760
		761	#if CORO_GUARDPAGES
		762	mprotect (base, CORO_GUARDPAGES * PAGESIZE, PROT_NONE);
		763	#endif
		764
		765	base = (void)((char )base + CORO_GUARDPAGES * PAGESIZE);
		766	#else
		767	base = malloc (ssze);
		768	if (!base)
		769	return 0;
		770	#endif
		771
		772	#if CORO_USE_VALGRIND
		773	stack->valgrind_id = VALGRIND_STACK_REGISTER ((char )base, ((char )base) + ssze - CORO_GUARDPAGES * PAGESIZE);
		774	#endif
		775
		776	stack->sptr = base;
		777	return 1;
		778
		779	#endif
		780	}
		781
		782	void
		783	coro_stack_free (struct coro_stack *stack)
		784	{
		785	#if CORO_FIBER
		786	/* nop */
		787	#else
		788	#if CORO_USE_VALGRIND
		789	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
		790	#endif
		791
		792	#if CORO_MMAP
		793	if (stack->sptr)
		794	munmap ((void)((char )stack->sptr - CORO_GUARDPAGES * PAGESIZE),
		795	stack->ssze + CORO_GUARDPAGES * PAGESIZE);
		796	#else
		797	free (stack->sptr);
		798	#endif
		799	#endif
		800	}
		801
		802	#endif
		803

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libcoro/coro.c (file contents): Revision 1.61 by root, Sun Jul 3 10:51:42 2011 UTC vs. Revision 1.69 by root, Fri Aug 26 10:27:12 2016 UTC

Diff Legend

Comparing libcoro/coro.c (file contents):
Revision 1.61 by root, Sun Jul 3 10:51:42 2011 UTC vs.
Revision 1.69 by root, Fri Aug 26 10:27:12 2016 UTC