1 | /* |
1 | /* |
2 | * Copyright (c) 2001 Marc Alexander Lehmann <pcg@goof.com> |
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 | * 3. The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * 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 |
18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
20 | * 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- |
21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
… | |
… | |
23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
20 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
21 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
22 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
23 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * |
24 | * |
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25 | * Alternatively, the contents of this file may be used under the terms of |
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26 | * the GNU General Public License ("GPL") version 2 or any later version, |
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27 | * in which case the provisions of the GPL are applicable instead of |
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28 | * the above. If you wish to allow the use of your version of this file |
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29 | * only under the terms of the GPL and not to allow others to use your |
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30 | * version of this file under the BSD license, indicate your decision |
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31 | * by deleting the provisions above and replace them with the notice |
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32 | * and other provisions required by the GPL. If you do not delete the |
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33 | * provisions above, a recipient may use your version of this file under |
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34 | * either the BSD or the GPL. |
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35 | * |
28 | * This library is modelled strictly after Ralf S. Engelschalls article at |
36 | * This library is modelled strictly after Ralf S. Engelschalls article at |
29 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
37 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
30 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
31 | */ |
39 | */ |
32 | |
40 | |
33 | #include "coro.h" |
41 | #include "coro.h" |
34 | |
42 | |
35 | #if CORO_LOOSE || CORO_SJLJ || CORO_LINUX |
43 | #include <stddef.h> |
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44 | #include <string.h> |
36 | |
45 | |
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46 | /*****************************************************************************/ |
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47 | /* ucontext/setjmp/asm backends */ |
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48 | /*****************************************************************************/ |
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49 | #if CORO_UCONTEXT || CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
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50 | |
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51 | # if CORO_UCONTEXT |
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52 | # include <stddef.h> |
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53 | # endif |
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54 | |
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55 | # if !defined(STACK_ADJUST_PTR) |
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56 | # if __sgi |
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57 | /* IRIX is decidedly NON-unix */ |
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58 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
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59 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
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60 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
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61 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
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62 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
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63 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
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64 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
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65 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
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66 | # else |
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67 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
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68 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
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69 | # endif |
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70 | # endif |
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71 | |
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72 | # include <stdlib.h> |
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73 | |
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74 | # if CORO_SJLJ |
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75 | # include <stdio.h> |
37 | #include <signal.h> |
76 | # include <signal.h> |
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77 | # include <unistd.h> |
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78 | # endif |
38 | |
79 | |
39 | static volatile coro_func coro_init_func; |
80 | static coro_func coro_init_func; |
40 | static volatile void *coro_init_arg; |
81 | static void *coro_init_arg; |
41 | static volatile coro_context *new_coro, *create_coro; |
82 | static coro_context *new_coro, *create_coro; |
42 | |
83 | |
43 | static void |
84 | static void |
44 | coro_init (void) |
85 | coro_init (void) |
45 | { |
86 | { |
46 | volatile coro_func func = coro_init_func; |
87 | volatile coro_func func = coro_init_func; |
47 | volatile void *arg = coro_init_arg; |
88 | volatile void *arg = coro_init_arg; |
48 | |
89 | |
49 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
90 | coro_transfer (new_coro, create_coro); |
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91 | |
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92 | #if __GCC_HAVE_DWARF2_CFI_ASM && __amd64 |
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93 | asm (".cfi_undefined rip"); |
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94 | #endif |
50 | |
95 | |
51 | func ((void *)arg); |
96 | func ((void *)arg); |
52 | |
97 | |
53 | /* the new coro returned. bad. just abort() for now */ |
98 | /* the new coro returned. bad. just abort() for now */ |
54 | abort (); |
99 | abort (); |
55 | } |
100 | } |
56 | |
101 | |
57 | # if CORO_SJLJ |
102 | # if CORO_SJLJ |
58 | # define coro_save(ctx) (void)setjmp((ctx)->env) |
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59 | |
103 | |
60 | static volatile int trampoline_count; |
104 | static volatile int trampoline_done; |
61 | |
105 | |
62 | /* trampoline signal handler */ |
106 | /* trampoline signal handler */ |
63 | static void |
107 | static void |
64 | trampoline(int sig) |
108 | trampoline (int sig) |
65 | { |
109 | { |
66 | if (setjmp (((coro_context *)new_coro)->env)) |
110 | if (coro_setjmp (new_coro->env)) |
67 | coro_init (); /* start it */ |
111 | coro_init (); /* start it */ |
68 | else |
112 | else |
69 | trampoline_count++; |
113 | trampoline_done = 1; |
70 | } |
114 | } |
71 | |
115 | |
72 | # endif |
116 | # endif |
73 | |
117 | |
74 | #elif CORO_UCONTEXT |
118 | # if CORO_ASM |
75 | # define coro_save(ctx) getcontext(&((ctx)->uc)) |
119 | |
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120 | #if __arm__ && \ |
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121 | (defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
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122 | || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__ \ |
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123 | || __ARCH_ARCH == 7) |
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124 | #define CORO_ARM 1 |
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125 | #endif |
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126 | |
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127 | #if _WIN32 || __CYGWIN__ |
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128 | #define CORO_WIN_TIB 1 |
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129 | #endif |
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130 | |
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131 | asm ( |
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132 | "\t.text\n" |
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133 | #if _WIN32 || __CYGWIN__ |
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134 | "\t.globl _coro_transfer\n" |
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135 | "_coro_transfer:\n" |
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136 | #else |
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137 | "\t.globl coro_transfer\n" |
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138 | "coro_transfer:\n" |
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139 | #endif |
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140 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
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141 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
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142 | #if __amd64 |
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143 | |
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144 | #if _WIN32 || __CYGWIN__ |
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145 | #define NUM_SAVED 29 |
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146 | "\tsubq $168, %rsp\t" /* one dummy qword to improve alignment */ |
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147 | "\tmovaps %xmm6, (%rsp)\n" |
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148 | "\tmovaps %xmm7, 16(%rsp)\n" |
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149 | "\tmovaps %xmm8, 32(%rsp)\n" |
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150 | "\tmovaps %xmm9, 48(%rsp)\n" |
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151 | "\tmovaps %xmm10, 64(%rsp)\n" |
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152 | "\tmovaps %xmm11, 80(%rsp)\n" |
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153 | "\tmovaps %xmm12, 96(%rsp)\n" |
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154 | "\tmovaps %xmm13, 112(%rsp)\n" |
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155 | "\tmovaps %xmm14, 128(%rsp)\n" |
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156 | "\tmovaps %xmm15, 144(%rsp)\n" |
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157 | "\tpushq %rsi\n" |
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158 | "\tpushq %rdi\n" |
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159 | "\tpushq %rbp\n" |
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160 | "\tpushq %rbx\n" |
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161 | "\tpushq %r12\n" |
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162 | "\tpushq %r13\n" |
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163 | "\tpushq %r14\n" |
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164 | "\tpushq %r15\n" |
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165 | #if CORO_WIN_TIB |
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166 | "\tpushq %fs:0x0\n" |
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167 | "\tpushq %fs:0x8\n" |
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168 | "\tpushq %fs:0xc\n" |
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169 | #endif |
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170 | "\tmovq %rsp, (%rcx)\n" |
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171 | "\tmovq (%rdx), %rsp\n" |
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172 | #if CORO_WIN_TIB |
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173 | "\tpopq %fs:0xc\n" |
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174 | "\tpopq %fs:0x8\n" |
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175 | "\tpopq %fs:0x0\n" |
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176 | #endif |
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177 | "\tpopq %r15\n" |
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178 | "\tpopq %r14\n" |
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179 | "\tpopq %r13\n" |
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180 | "\tpopq %r12\n" |
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181 | "\tpopq %rbx\n" |
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182 | "\tpopq %rbp\n" |
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183 | "\tpopq %rdi\n" |
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184 | "\tpopq %rsi\n" |
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185 | "\tmovaps (%rsp), %xmm6\n" |
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186 | "\tmovaps 16(%rsp), %xmm7\n" |
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187 | "\tmovaps 32(%rsp), %xmm8\n" |
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188 | "\tmovaps 48(%rsp), %xmm9\n" |
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189 | "\tmovaps 64(%rsp), %xmm10\n" |
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190 | "\tmovaps 80(%rsp), %xmm11\n" |
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191 | "\tmovaps 96(%rsp), %xmm12\n" |
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192 | "\tmovaps 112(%rsp), %xmm13\n" |
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193 | "\tmovaps 128(%rsp), %xmm14\n" |
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194 | "\tmovaps 144(%rsp), %xmm15\n" |
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195 | "\taddq $168, %rsp\n" |
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196 | #else |
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197 | #define NUM_SAVED 6 |
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198 | "\tpushq %rbp\n" |
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199 | "\tpushq %rbx\n" |
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200 | "\tpushq %r12\n" |
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201 | "\tpushq %r13\n" |
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202 | "\tpushq %r14\n" |
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203 | "\tpushq %r15\n" |
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204 | "\tmovq %rsp, (%rdi)\n" |
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205 | "\tmovq (%rsi), %rsp\n" |
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206 | "\tpopq %r15\n" |
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207 | "\tpopq %r14\n" |
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208 | "\tpopq %r13\n" |
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209 | "\tpopq %r12\n" |
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210 | "\tpopq %rbx\n" |
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211 | "\tpopq %rbp\n" |
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212 | #endif |
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213 | "\tpopq %rcx\n" |
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214 | "\tjmpq *%rcx\n" |
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215 | |
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216 | #elif __i386__ |
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217 | |
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218 | #define NUM_SAVED 4 |
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219 | "\tpushl %ebp\n" |
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220 | "\tpushl %ebx\n" |
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221 | "\tpushl %esi\n" |
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222 | "\tpushl %edi\n" |
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223 | #if CORO_WIN_TIB |
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224 | #undef NUM_SAVED |
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225 | #define NUM_SAVED 7 |
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226 | "\tpushl %fs:0\n" |
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227 | "\tpushl %fs:4\n" |
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228 | "\tpushl %fs:8\n" |
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229 | #endif |
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230 | "\tmovl %esp, (%eax)\n" |
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231 | "\tmovl (%edx), %esp\n" |
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232 | #if CORO_WIN_TIB |
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233 | "\tpopl %fs:8\n" |
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234 | "\tpopl %fs:4\n" |
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235 | "\tpopl %fs:0\n" |
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236 | #endif |
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237 | "\tpopl %edi\n" |
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238 | "\tpopl %esi\n" |
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239 | "\tpopl %ebx\n" |
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240 | "\tpopl %ebp\n" |
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241 | "\tpopl %ecx\n" |
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242 | "\tjmpl *%ecx\n" |
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243 | |
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244 | #elif CORO_ARM /* untested, what about thumb, neon, iwmmxt? */ |
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245 | |
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246 | #if __ARM_PCS_VFP |
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247 | "\tvpush {d8-d15}\n" |
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248 | #define NUM_SAVED (9 + 8 * 2) |
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249 | #else |
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250 | #define NUM_SAVED 9 |
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251 | #endif |
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252 | "\tpush {r4-r11,lr}\n" |
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253 | "\tstr sp, [r0]\n" |
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254 | "\tldr sp, [r1]\n" |
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255 | "\tpop {r4-r11,lr}\n" |
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256 | #if __ARM_PCS_VFP |
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257 | "\tvpop {d8-d15}\n" |
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258 | #endif |
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259 | "\tmov r15, lr\n" |
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260 | |
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261 | #elif __mips__ && 0 /* untested, 32 bit only */ |
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262 | |
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263 | #define NUM_SAVED (12 + 8 * 2) |
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264 | /* TODO: n64/o64, lw=>ld */ |
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265 | |
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266 | "\t.set nomips16\n" |
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267 | "\t.frame $sp,112,$31\n" |
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268 | #if __mips_soft_float |
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269 | "\taddiu $sp,$sp,-44\n" |
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270 | #else |
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271 | "\taddiu $sp,$sp,-112\n" |
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272 | "\ts.d $f30,88($sp)\n" |
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273 | "\ts.d $f28,80($sp)\n" |
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274 | "\ts.d $f26,72($sp)\n" |
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275 | "\ts.d $f24,64($sp)\n" |
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276 | "\ts.d $f22,56($sp)\n" |
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277 | "\ts.d $f20,48($sp)\n" |
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278 | #endif |
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279 | "\tsw $28,40($sp)\n" |
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280 | "\tsw $31,36($sp)\n" |
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281 | "\tsw $fp,32($sp)\n" |
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282 | "\tsw $23,28($sp)\n" |
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283 | "\tsw $22,24($sp)\n" |
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284 | "\tsw $21,20($sp)\n" |
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285 | "\tsw $20,16($sp)\n" |
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286 | "\tsw $19,12($sp)\n" |
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287 | "\tsw $18,8($sp)\n" |
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288 | "\tsw $17,4($sp)\n" |
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289 | "\tsw $16,0($sp)\n" |
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290 | "\tsw $sp,0($4)\n" |
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291 | "\tlw $sp,0($5)\n" |
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292 | #if !__mips_soft_float |
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293 | "\tl.d $f30,88($sp)\n" |
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294 | "\tl.d $f28,80($sp)\n" |
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295 | "\tl.d $f26,72($sp)\n" |
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296 | "\tl.d $f24,64($sp)\n" |
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297 | "\tl.d $f22,56($sp)\n" |
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298 | "\tl.d $f20,48($sp)\n" |
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299 | #endif |
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300 | "\tlw $28,40($sp)\n" |
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301 | "\tlw $31,36($sp)\n" |
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302 | "\tlw $fp,32($sp)\n" |
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303 | "\tlw $23,28($sp)\n" |
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304 | "\tlw $22,24($sp)\n" |
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305 | "\tlw $21,20($sp)\n" |
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306 | "\tlw $20,16($sp)\n" |
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307 | "\tlw $19,12($sp)\n" |
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308 | "\tlw $18,8($sp)\n" |
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309 | "\tlw $17,4($sp)\n" |
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310 | "\tlw $16,0($sp)\n" |
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311 | "\tj $31\n" |
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312 | #if __mips_soft_float |
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313 | "\taddiu $sp,$sp,44\n" |
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314 | #else |
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315 | "\taddiu $sp,$sp,112\n" |
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316 | #endif |
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317 | |
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318 | #else |
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319 | #error unsupported architecture |
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320 | #endif |
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321 | ); |
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322 | |
76 | #endif |
323 | # endif |
77 | |
324 | |
78 | /* initialize a machine state */ |
325 | void |
79 | void coro_create(coro_context *ctx, |
326 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
80 | coro_func coro, void *arg, |
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81 | void *sptr, long ssize) |
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82 | { |
327 | { |
83 | #if CORO_UCONTEXT |
328 | coro_context nctx; |
84 | |
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85 | getcontext (&(ctx->uc)); |
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86 | |
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87 | ctx->uc.uc_link = 0; |
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88 | ctx->uc.uc_stack.ss_sp = sptr; |
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89 | ctx->uc.uc_stack.ss_size = (size_t) ssize; |
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90 | ctx->uc.uc_stack.ss_flags = 0; |
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91 | |
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92 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
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93 | |
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94 | #elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX |
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95 | |
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96 | # if CORO_SJLJ |
329 | # if CORO_SJLJ |
97 | stack_t ostk, nstk; |
330 | stack_t ostk, nstk; |
98 | struct sigaction osa, nsa; |
331 | struct sigaction osa, nsa; |
99 | sigset_t nsig, osig; |
332 | sigset_t nsig, osig; |
100 | # endif |
333 | # endif |
101 | coro_context nctx; |
334 | |
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335 | if (!coro) |
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336 | return; |
102 | |
337 | |
103 | coro_init_func = coro; |
338 | coro_init_func = coro; |
104 | coro_init_arg = arg; |
339 | coro_init_arg = arg; |
105 | |
340 | |
106 | new_coro = ctx; |
341 | new_coro = ctx; |
… | |
… | |
116 | nsa.sa_handler = trampoline; |
351 | nsa.sa_handler = trampoline; |
117 | sigemptyset (&nsa.sa_mask); |
352 | sigemptyset (&nsa.sa_mask); |
118 | nsa.sa_flags = SA_ONSTACK; |
353 | nsa.sa_flags = SA_ONSTACK; |
119 | |
354 | |
120 | if (sigaction (SIGUSR2, &nsa, &osa)) |
355 | if (sigaction (SIGUSR2, &nsa, &osa)) |
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356 | { |
121 | perror ("sigaction"); |
357 | perror ("sigaction"); |
|
|
358 | abort (); |
|
|
359 | } |
122 | |
360 | |
123 | /* set the new stack */ |
361 | /* set the new stack */ |
124 | nstk.ss_sp = sptr; |
362 | nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */ |
125 | nstk.ss_size = ssize; |
363 | nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize); |
126 | nstk.ss_flags = 0; |
364 | nstk.ss_flags = 0; |
127 | |
365 | |
128 | if (sigaltstack (&nstk, &ostk) < 0) |
366 | if (sigaltstack (&nstk, &ostk) < 0) |
|
|
367 | { |
129 | perror ("sigaltstack"); |
368 | perror ("sigaltstack"); |
|
|
369 | abort (); |
|
|
370 | } |
130 | |
371 | |
131 | trampoline_count = 0; |
372 | trampoline_done = 0; |
132 | kill (getpid (), SIGUSR2); |
373 | kill (getpid (), SIGUSR2); |
133 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
374 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
134 | |
375 | |
135 | while (!trampoline_count) |
376 | while (!trampoline_done) |
136 | sigsuspend (&nsig); |
377 | sigsuspend (&nsig); |
137 | |
378 | |
138 | sigaltstack (0, &nstk); |
379 | sigaltstack (0, &nstk); |
139 | nstk.ss_flags = SS_DISABLE; |
380 | nstk.ss_flags = SS_DISABLE; |
140 | if (sigaltstack (&nstk, 0) < 0) |
381 | if (sigaltstack (&nstk, 0) < 0) |
… | |
… | |
145 | abort (); |
386 | abort (); |
146 | |
387 | |
147 | if (~ostk.ss_flags & SS_DISABLE) |
388 | if (~ostk.ss_flags & SS_DISABLE) |
148 | sigaltstack (&ostk, 0); |
389 | sigaltstack (&ostk, 0); |
149 | |
390 | |
150 | sigaction (SIGUSR1, &osa, 0); |
391 | sigaction (SIGUSR2, &osa, 0); |
151 | |
|
|
152 | sigprocmask (SIG_SETMASK, &osig, 0); |
392 | sigprocmask (SIG_SETMASK, &osig, 0); |
153 | |
393 | |
154 | # elif CORO_LOOSE |
394 | # elif CORO_LOSER |
155 | |
395 | |
156 | setjmp (ctx->env); |
396 | coro_setjmp (ctx->env); |
157 | ctx->env[7] = (int)((char *)sptr + ssize); |
397 | #if __CYGWIN__ && __i386__ |
158 | ctx->env[8] = (int)coro_init; |
398 | ctx->env[8] = (long) coro_init; |
|
|
399 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
|
|
400 | #elif __CYGWIN__ && __x86_64__ |
|
|
401 | ctx->env[7] = (long) coro_init; |
|
|
402 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
|
|
403 | #elif defined __MINGW32__ |
|
|
404 | ctx->env[5] = (long) coro_init; |
|
|
405 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
|
|
406 | #elif defined _M_IX86 |
|
|
407 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
|
|
408 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
409 | #elif defined _M_AMD64 |
|
|
410 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
|
|
411 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
|
|
412 | #elif defined _M_IA64 |
|
|
413 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
|
|
414 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
|
|
415 | #else |
|
|
416 | #error "microsoft libc or architecture not supported" |
|
|
417 | #endif |
159 | |
418 | |
160 | # elif CORO_LINUX |
419 | # elif CORO_LINUX |
161 | |
420 | |
162 | setjmp (ctx->env); |
421 | coro_setjmp (ctx->env); |
163 | #if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
|
|
164 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) |
422 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
165 | ctx->env[0].__jmpbuf[JB_PC] = (int)coro_init; |
423 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
166 | ctx->env[0].__jmpbuf[JB_SP] = (int)((char *)sptr + ssize); |
424 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
167 | #elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
|
|
168 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) |
425 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
169 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
426 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
170 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
427 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
171 | #elif defined(__GNU_LIBRARY__) && defined(__i386__) |
428 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
172 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
429 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
173 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
430 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
|
|
431 | #elif defined (__GNU_LIBRARY__) && defined (__x86_64__) |
|
|
432 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
|
|
433 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
|
|
434 | #else |
|
|
435 | #error "linux libc or architecture not supported" |
|
|
436 | #endif |
|
|
437 | |
|
|
438 | # elif CORO_IRIX |
|
|
439 | |
|
|
440 | coro_setjmp (ctx->env, 0); |
|
|
441 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
442 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
443 | |
|
|
444 | # elif CORO_ASM |
|
|
445 | |
|
|
446 | #if __i386__ || __x86_64__ |
|
|
447 | ctx->sp = (void **)(ssize + (char *)sptr); |
|
|
448 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
|
|
449 | *--ctx->sp = (void *)coro_init; |
|
|
450 | #if CORO_WIN_TIB |
|
|
451 | *--ctx->sp = 0; /* ExceptionList */ |
|
|
452 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
|
|
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 |
|
|
459 | #endif |
|
|
460 | |
|
|
461 | 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 |
|
|
473 | |
|
|
474 | # elif CORO_UCONTEXT |
|
|
475 | |
|
|
476 | getcontext (&(ctx->uc)); |
|
|
477 | |
|
|
478 | ctx->uc.uc_link = 0; |
|
|
479 | ctx->uc.uc_stack.ss_sp = sptr; |
|
|
480 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
|
|
481 | ctx->uc.uc_stack.ss_flags = 0; |
|
|
482 | |
|
|
483 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
|
|
484 | |
|
|
485 | # endif |
|
|
486 | |
|
|
487 | coro_transfer (create_coro, new_coro); |
|
|
488 | } |
|
|
489 | |
|
|
490 | /*****************************************************************************/ |
|
|
491 | /* pthread backend */ |
|
|
492 | /*****************************************************************************/ |
|
|
493 | #elif CORO_PTHREAD |
|
|
494 | |
|
|
495 | /* this mutex will be locked by the running coroutine */ |
|
|
496 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
|
|
497 | |
|
|
498 | struct coro_init_args |
|
|
499 | { |
|
|
500 | coro_func func; |
|
|
501 | void *arg; |
|
|
502 | coro_context *self, *main; |
|
|
503 | }; |
|
|
504 | |
|
|
505 | static pthread_t null_tid; |
|
|
506 | |
|
|
507 | /* I'd so love to cast pthread_mutex_unlock to void (*)(void *)... */ |
|
|
508 | static void |
|
|
509 | mutex_unlock_wrapper (void *arg) |
|
|
510 | { |
|
|
511 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
|
|
512 | } |
|
|
513 | |
|
|
514 | static void * |
|
|
515 | coro_init (void *args_) |
|
|
516 | { |
|
|
517 | struct coro_init_args *args = (struct coro_init_args *)args_; |
|
|
518 | coro_func func = args->func; |
|
|
519 | void *arg = args->arg; |
|
|
520 | |
|
|
521 | pthread_mutex_lock (&coro_mutex); |
|
|
522 | |
|
|
523 | /* we try to be good citizens and use deferred cancellation and cleanup handlers */ |
|
|
524 | pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex); |
|
|
525 | coro_transfer (args->self, args->main); |
|
|
526 | func (arg); |
|
|
527 | pthread_cleanup_pop (1); |
|
|
528 | |
|
|
529 | return 0; |
|
|
530 | } |
|
|
531 | |
|
|
532 | void |
|
|
533 | coro_transfer (coro_context *prev, coro_context *next) |
|
|
534 | { |
|
|
535 | pthread_cond_signal (&next->cv); |
|
|
536 | pthread_cond_wait (&prev->cv, &coro_mutex); |
|
|
537 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
|
|
538 | pthread_testcancel (); |
|
|
539 | #endif |
|
|
540 | } |
|
|
541 | |
|
|
542 | void |
|
|
543 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
|
|
544 | { |
|
|
545 | static coro_context nctx; |
|
|
546 | static int once; |
|
|
547 | |
|
|
548 | if (!once) |
|
|
549 | { |
|
|
550 | once = 1; |
|
|
551 | |
|
|
552 | pthread_mutex_lock (&coro_mutex); |
|
|
553 | pthread_cond_init (&nctx.cv, 0); |
|
|
554 | null_tid = pthread_self (); |
|
|
555 | } |
|
|
556 | |
|
|
557 | pthread_cond_init (&ctx->cv, 0); |
|
|
558 | |
|
|
559 | if (coro) |
|
|
560 | { |
|
|
561 | pthread_attr_t attr; |
|
|
562 | struct coro_init_args args; |
|
|
563 | |
|
|
564 | args.func = coro; |
|
|
565 | args.arg = arg; |
|
|
566 | args.self = ctx; |
|
|
567 | args.main = &nctx; |
|
|
568 | |
|
|
569 | pthread_attr_init (&attr); |
|
|
570 | #if __UCLIBC__ |
|
|
571 | /* exists, but is borked */ |
|
|
572 | /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ |
|
|
573 | #elif __CYGWIN__ |
|
|
574 | /* POSIX, not here */ |
|
|
575 | pthread_attr_setstacksize (&attr, (size_t)ssize); |
174 | #else |
576 | #else |
175 | #error "Unsupported Linux (g)libc version and/or platform" |
577 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
|
578 | #endif |
|
|
579 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
|
|
580 | pthread_create (&ctx->id, &attr, coro_init, &args); |
|
|
581 | |
|
|
582 | coro_transfer (args.main, args.self); |
|
|
583 | } |
|
|
584 | else |
|
|
585 | ctx->id = null_tid; |
|
|
586 | } |
|
|
587 | |
|
|
588 | void |
|
|
589 | coro_destroy (coro_context *ctx) |
|
|
590 | { |
|
|
591 | if (!pthread_equal (ctx->id, null_tid)) |
|
|
592 | { |
|
|
593 | pthread_cancel (ctx->id); |
|
|
594 | pthread_mutex_unlock (&coro_mutex); |
|
|
595 | pthread_join (ctx->id, 0); |
|
|
596 | pthread_mutex_lock (&coro_mutex); |
|
|
597 | } |
|
|
598 | |
|
|
599 | pthread_cond_destroy (&ctx->cv); |
|
|
600 | } |
|
|
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 | |
|
|
655 | #else |
|
|
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 |
176 | #endif |
682 | # endif |
177 | |
|
|
178 | # endif |
683 | # endif |
179 | |
684 | # include <limits.h> |
180 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
|
|
181 | |
|
|
182 | #else |
685 | #else |
183 | error unsupported architecture |
686 | # undef CORO_MMAP |
|
|
687 | #endif |
|
|
688 | |
|
|
689 | #if _POSIX_MEMORY_PROTECTION |
|
|
690 | # ifndef CORO_GUARDPAGES |
|
|
691 | # define CORO_GUARDPAGES 4 |
184 | #endif |
692 | # endif |
185 | } |
693 | #else |
|
|
694 | # undef CORO_GUARDPAGES |
|
|
695 | #endif |
186 | |
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 | |