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, |
… | |
… | |
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 | |
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43 | #include <stddef.h> |
43 | #include <string.h> |
44 | #include <string.h> |
44 | |
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 | |
45 | #if !defined(STACK_ADJUST_PTR) |
55 | # if !defined(STACK_ADJUST_PTR) |
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56 | # if __sgi |
46 | /* IRIX is decidedly NON-unix */ |
57 | /* IRIX is decidedly NON-unix */ |
47 | # if __sgi |
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48 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
58 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
49 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
59 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
50 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
60 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
51 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
61 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
52 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
62 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
53 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
63 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
54 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
64 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
55 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
65 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
56 | # else |
66 | # else |
57 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
67 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
58 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
68 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
59 | # endif |
69 | # endif |
60 | #endif |
70 | # endif |
61 | |
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62 | #if CORO_UCONTEXT |
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63 | # include <stddef.h> |
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64 | #endif |
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65 | |
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66 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
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67 | |
71 | |
68 | # include <stdlib.h> |
72 | # include <stdlib.h> |
69 | |
73 | |
70 | # if CORO_SJLJ |
74 | # if CORO_SJLJ |
71 | # include <stdio.h> |
75 | # include <stdio.h> |
72 | # include <signal.h> |
76 | # include <signal.h> |
73 | # include <unistd.h> |
77 | # include <unistd.h> |
74 | # endif |
78 | # endif |
75 | |
79 | |
76 | static volatile coro_func coro_init_func; |
80 | static coro_func coro_init_func; |
77 | static volatile void *coro_init_arg; |
81 | static void *coro_init_arg; |
78 | static volatile coro_context *new_coro, *create_coro; |
82 | static coro_context *new_coro, *create_coro; |
79 | |
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80 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
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81 | /* instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
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82 | # if __GNUC__ >= 3 && __ELF__ && __linux__ |
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83 | # define HAVE_CFI 1 |
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84 | # endif |
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85 | |
83 | |
86 | static void |
84 | static void |
87 | coro_init (void) |
85 | coro_init (void) |
88 | { |
86 | { |
89 | volatile coro_func func = coro_init_func; |
87 | volatile coro_func func = coro_init_func; |
90 | volatile void *arg = coro_init_arg; |
88 | volatile void *arg = coro_init_arg; |
91 | |
89 | |
92 | 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 |
93 | |
95 | |
94 | func ((void *)arg); |
96 | func ((void *)arg); |
95 | |
97 | |
96 | /* the new coro returned. bad. just abort() for now */ |
98 | /* the new coro returned. bad. just abort() for now */ |
97 | abort (); |
99 | abort (); |
98 | } |
100 | } |
99 | |
101 | |
100 | # if CORO_SJLJ |
102 | # if CORO_SJLJ |
101 | |
103 | |
102 | static volatile int trampoline_count; |
104 | static volatile int trampoline_done; |
103 | |
105 | |
104 | /* trampoline signal handler */ |
106 | /* trampoline signal handler */ |
105 | static void |
107 | static void |
106 | trampoline (int sig) |
108 | trampoline (int sig) |
107 | { |
109 | { |
108 | if (setjmp (((coro_context *)new_coro)->env)) |
110 | if (coro_setjmp (new_coro->env)) |
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111 | coro_init (); /* start it */ |
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112 | else |
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113 | trampoline_done = 1; |
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114 | } |
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115 | |
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116 | # endif |
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117 | |
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118 | # if CORO_ASM |
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119 | |
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120 | #if _WIN32 || __CYGWIN__ |
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121 | #define CORO_WIN_TIB 1 |
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122 | #endif |
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123 | |
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124 | asm ( |
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125 | "\t.text\n" |
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126 | #if _WIN32 || __CYGWIN__ |
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127 | "\t.globl _coro_transfer\n" |
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128 | "_coro_transfer:\n" |
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129 | #else |
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130 | "\t.globl coro_transfer\n" |
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131 | "coro_transfer:\n" |
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132 | #endif |
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133 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
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134 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
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135 | #if __amd64 |
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136 | |
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137 | #if _WIN32 || __CYGWIN__ |
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138 | #define NUM_SAVED 29 |
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139 | "\tsubq $168, %rsp\t" /* one dummy qword to improve alignment */ |
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140 | "\tmovaps %xmm6, (%rsp)\n" |
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141 | "\tmovaps %xmm7, 16(%rsp)\n" |
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142 | "\tmovaps %xmm8, 32(%rsp)\n" |
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143 | "\tmovaps %xmm9, 48(%rsp)\n" |
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144 | "\tmovaps %xmm10, 64(%rsp)\n" |
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145 | "\tmovaps %xmm11, 80(%rsp)\n" |
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146 | "\tmovaps %xmm12, 96(%rsp)\n" |
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147 | "\tmovaps %xmm13, 112(%rsp)\n" |
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148 | "\tmovaps %xmm14, 128(%rsp)\n" |
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149 | "\tmovaps %xmm15, 144(%rsp)\n" |
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150 | "\tpushq %rsi\n" |
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151 | "\tpushq %rdi\n" |
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152 | "\tpushq %rbp\n" |
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153 | "\tpushq %rbx\n" |
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154 | "\tpushq %r12\n" |
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155 | "\tpushq %r13\n" |
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156 | "\tpushq %r14\n" |
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157 | "\tpushq %r15\n" |
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158 | #if CORO_WIN_TIB |
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159 | "\tpushq %fs:0x0\n" |
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160 | "\tpushq %fs:0x8\n" |
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161 | "\tpushq %fs:0xc\n" |
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162 | #endif |
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163 | "\tmovq %rsp, (%rcx)\n" |
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164 | "\tmovq (%rdx), %rsp\n" |
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165 | #if CORO_WIN_TIB |
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166 | "\tpopq %fs:0xc\n" |
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167 | "\tpopq %fs:0x8\n" |
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168 | "\tpopq %fs:0x0\n" |
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169 | #endif |
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170 | "\tpopq %r15\n" |
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171 | "\tpopq %r14\n" |
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172 | "\tpopq %r13\n" |
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173 | "\tpopq %r12\n" |
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174 | "\tpopq %rbx\n" |
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175 | "\tpopq %rbp\n" |
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176 | "\tpopq %rdi\n" |
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177 | "\tpopq %rsi\n" |
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178 | "\tmovaps (%rsp), %xmm6\n" |
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179 | "\tmovaps 16(%rsp), %xmm7\n" |
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180 | "\tmovaps 32(%rsp), %xmm8\n" |
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181 | "\tmovaps 48(%rsp), %xmm9\n" |
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182 | "\tmovaps 64(%rsp), %xmm10\n" |
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183 | "\tmovaps 80(%rsp), %xmm11\n" |
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184 | "\tmovaps 96(%rsp), %xmm12\n" |
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185 | "\tmovaps 112(%rsp), %xmm13\n" |
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186 | "\tmovaps 128(%rsp), %xmm14\n" |
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187 | "\tmovaps 144(%rsp), %xmm15\n" |
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188 | "\taddq $168, %rsp\n" |
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189 | #else |
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190 | #define NUM_SAVED 6 |
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191 | "\tpushq %rbp\n" |
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192 | "\tpushq %rbx\n" |
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193 | "\tpushq %r12\n" |
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194 | "\tpushq %r13\n" |
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195 | "\tpushq %r14\n" |
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196 | "\tpushq %r15\n" |
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197 | "\tmovq %rsp, (%rdi)\n" |
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198 | "\tmovq (%rsi), %rsp\n" |
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199 | "\tpopq %r15\n" |
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200 | "\tpopq %r14\n" |
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201 | "\tpopq %r13\n" |
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202 | "\tpopq %r12\n" |
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203 | "\tpopq %rbx\n" |
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204 | "\tpopq %rbp\n" |
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205 | #endif |
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206 | "\tpopq %rcx\n" |
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207 | "\tjmpq *%rcx\n" |
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208 | |
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209 | #elif __i386 |
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210 | |
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211 | #define NUM_SAVED 4 |
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212 | "\tpushl %ebp\n" |
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213 | "\tpushl %ebx\n" |
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214 | "\tpushl %esi\n" |
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215 | "\tpushl %edi\n" |
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216 | #if CORO_WIN_TIB |
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217 | #undef NUM_SAVED |
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218 | #define NUM_SAVED 7 |
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219 | "\tpushl %fs:0\n" |
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220 | "\tpushl %fs:4\n" |
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221 | "\tpushl %fs:8\n" |
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222 | #endif |
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223 | "\tmovl %esp, (%eax)\n" |
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224 | "\tmovl (%edx), %esp\n" |
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225 | #if CORO_WIN_TIB |
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226 | "\tpopl %fs:8\n" |
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227 | "\tpopl %fs:4\n" |
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228 | "\tpopl %fs:0\n" |
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229 | #endif |
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230 | "\tpopl %edi\n" |
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231 | "\tpopl %esi\n" |
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232 | "\tpopl %ebx\n" |
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233 | "\tpopl %ebp\n" |
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234 | "\tpopl %ecx\n" |
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235 | "\tjmpl *%ecx\n" |
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236 | |
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237 | #else |
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238 | #error unsupported architecture |
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239 | #endif |
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240 | ); |
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241 | |
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242 | # endif |
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243 | |
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244 | void |
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245 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
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246 | { |
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247 | coro_context nctx; |
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248 | # if CORO_SJLJ |
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249 | stack_t ostk, nstk; |
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250 | struct sigaction osa, nsa; |
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251 | sigset_t nsig, osig; |
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252 | # endif |
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253 | |
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254 | if (!coro) |
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255 | return; |
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256 | |
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257 | coro_init_func = coro; |
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258 | coro_init_arg = arg; |
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259 | |
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260 | new_coro = ctx; |
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261 | create_coro = &nctx; |
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262 | |
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263 | # if CORO_SJLJ |
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264 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
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265 | |
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266 | sigemptyset (&nsig); |
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267 | sigaddset (&nsig, SIGUSR2); |
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268 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
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269 | |
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270 | nsa.sa_handler = trampoline; |
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271 | sigemptyset (&nsa.sa_mask); |
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272 | nsa.sa_flags = SA_ONSTACK; |
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273 | |
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274 | if (sigaction (SIGUSR2, &nsa, &osa)) |
109 | { |
275 | { |
110 | # if HAVE_CFI |
276 | perror ("sigaction"); |
111 | asm (".cfi_startproc"); |
277 | abort (); |
112 | # endif |
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113 | coro_init (); /* start it */ |
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114 | # if HAVE_CFI |
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115 | asm (".cfi_endproc"); |
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116 | # endif |
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117 | } |
278 | } |
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279 | |
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280 | /* set the new stack */ |
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281 | nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */ |
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282 | nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize); |
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283 | nstk.ss_flags = 0; |
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284 | |
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285 | if (sigaltstack (&nstk, &ostk) < 0) |
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286 | { |
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287 | perror ("sigaltstack"); |
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288 | abort (); |
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289 | } |
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290 | |
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291 | trampoline_done = 0; |
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292 | kill (getpid (), SIGUSR2); |
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293 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
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294 | |
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295 | while (!trampoline_done) |
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296 | sigsuspend (&nsig); |
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297 | |
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298 | sigaltstack (0, &nstk); |
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299 | nstk.ss_flags = SS_DISABLE; |
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300 | if (sigaltstack (&nstk, 0) < 0) |
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301 | perror ("sigaltstack"); |
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302 | |
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303 | sigaltstack (0, &nstk); |
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304 | if (~nstk.ss_flags & SS_DISABLE) |
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305 | abort (); |
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306 | |
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307 | if (~ostk.ss_flags & SS_DISABLE) |
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308 | sigaltstack (&ostk, 0); |
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309 | |
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310 | sigaction (SIGUSR2, &osa, 0); |
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311 | sigprocmask (SIG_SETMASK, &osig, 0); |
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312 | |
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313 | # elif CORO_LOSER |
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314 | |
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315 | coro_setjmp (ctx->env); |
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316 | #if __CYGWIN__ && __i386 |
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317 | ctx->env[8] = (long) coro_init; |
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318 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
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319 | #elif __CYGWIN__ && __x86_64 |
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320 | ctx->env[7] = (long) coro_init; |
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321 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
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322 | #elif defined __MINGW32__ |
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323 | ctx->env[5] = (long) coro_init; |
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324 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
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325 | #elif defined _M_IX86 |
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326 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
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327 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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328 | #elif defined _M_AMD64 |
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329 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
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330 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
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331 | #elif defined _M_IA64 |
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332 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
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333 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
118 | else |
334 | #else |
119 | trampoline_count++; |
335 | #error "microsoft libc or architecture not supported" |
120 | } |
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121 | |
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122 | # endif |
336 | #endif |
123 | |
337 | |
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338 | # elif CORO_LINUX |
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339 | |
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340 | coro_setjmp (ctx->env); |
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341 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
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342 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
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343 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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344 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
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345 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
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346 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
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347 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
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348 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
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349 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
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350 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
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351 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
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352 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
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353 | #else |
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354 | #error "linux libc or architecture not supported" |
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355 | #endif |
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356 | |
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357 | # elif CORO_IRIX |
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358 | |
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359 | coro_setjmp (ctx->env, 0); |
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360 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
361 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
362 | |
|
|
363 | # elif CORO_ASM |
|
|
364 | |
|
|
365 | ctx->sp = (void **)(ssize + (char *)sptr); |
|
|
366 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
|
|
367 | *--ctx->sp = (void *)coro_init; |
|
|
368 | |
|
|
369 | #if CORO_WIN_TIB |
|
|
370 | *--ctx->sp = 0; /* ExceptionList */ |
|
|
371 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
|
|
372 | *--ctx->sp = sptr; /* StackLimit */ |
|
|
373 | #endif |
|
|
374 | |
|
|
375 | ctx->sp -= NUM_SAVED; |
|
|
376 | memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED); |
|
|
377 | |
|
|
378 | # elif CORO_UCONTEXT |
|
|
379 | |
|
|
380 | getcontext (&(ctx->uc)); |
|
|
381 | |
|
|
382 | ctx->uc.uc_link = 0; |
|
|
383 | ctx->uc.uc_stack.ss_sp = sptr; |
|
|
384 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
|
|
385 | ctx->uc.uc_stack.ss_flags = 0; |
|
|
386 | |
|
|
387 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
|
|
388 | |
124 | #endif |
389 | # endif |
125 | |
390 | |
126 | #if CORO_ASM |
391 | coro_transfer (create_coro, new_coro); |
|
|
392 | } |
127 | |
393 | |
128 | asm ( |
394 | /*****************************************************************************/ |
129 | ".text\n" |
395 | /* pthread backend */ |
130 | ".globl coro_transfer\n" |
396 | /*****************************************************************************/ |
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 |
397 | #elif CORO_PTHREAD |
170 | |
398 | |
171 | /* this mutex will be locked by the running coroutine */ |
399 | /* this mutex will be locked by the running coroutine */ |
172 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
400 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
173 | |
401 | |
174 | struct coro_init_args |
402 | struct coro_init_args |
… | |
… | |
186 | { |
414 | { |
187 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
415 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
188 | } |
416 | } |
189 | |
417 | |
190 | static void * |
418 | static void * |
191 | trampoline (void *args_) |
419 | coro_init (void *args_) |
192 | { |
420 | { |
193 | struct coro_init_args *args = (struct coro_init_args *)args_; |
421 | struct coro_init_args *args = (struct coro_init_args *)args_; |
194 | coro_func func = args->func; |
422 | coro_func func = args->func; |
195 | void *arg = args->arg; |
423 | void *arg = args->arg; |
196 | |
424 | |
… | |
… | |
208 | void |
436 | void |
209 | coro_transfer (coro_context *prev, coro_context *next) |
437 | coro_transfer (coro_context *prev, coro_context *next) |
210 | { |
438 | { |
211 | pthread_cond_signal (&next->cv); |
439 | pthread_cond_signal (&next->cv); |
212 | pthread_cond_wait (&prev->cv, &coro_mutex); |
440 | pthread_cond_wait (&prev->cv, &coro_mutex); |
|
|
441 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
|
|
442 | pthread_testcancel (); |
|
|
443 | #endif |
|
|
444 | } |
|
|
445 | |
|
|
446 | void |
|
|
447 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
|
|
448 | { |
|
|
449 | static coro_context nctx; |
|
|
450 | static int once; |
|
|
451 | |
|
|
452 | if (!once) |
|
|
453 | { |
|
|
454 | once = 1; |
|
|
455 | |
|
|
456 | pthread_mutex_lock (&coro_mutex); |
|
|
457 | pthread_cond_init (&nctx.cv, 0); |
|
|
458 | null_tid = pthread_self (); |
|
|
459 | } |
|
|
460 | |
|
|
461 | pthread_cond_init (&ctx->cv, 0); |
|
|
462 | |
|
|
463 | if (coro) |
|
|
464 | { |
|
|
465 | pthread_attr_t attr; |
|
|
466 | struct coro_init_args args; |
|
|
467 | |
|
|
468 | args.func = coro; |
|
|
469 | args.arg = arg; |
|
|
470 | args.self = ctx; |
|
|
471 | args.main = &nctx; |
|
|
472 | |
|
|
473 | pthread_attr_init (&attr); |
|
|
474 | #if __UCLIBC__ |
|
|
475 | /* exists, but is borked */ |
|
|
476 | /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ |
|
|
477 | #elif __CYGWIN__ |
|
|
478 | /* POSIX, not here */ |
|
|
479 | pthread_attr_setstacksize (&attr, (size_t)ssize); |
|
|
480 | #else |
|
|
481 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
|
482 | #endif |
|
|
483 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
|
|
484 | pthread_create (&ctx->id, &attr, coro_init, &args); |
|
|
485 | |
|
|
486 | coro_transfer (args.main, args.self); |
|
|
487 | } |
|
|
488 | else |
|
|
489 | ctx->id = null_tid; |
213 | } |
490 | } |
214 | |
491 | |
215 | void |
492 | void |
216 | coro_destroy (coro_context *ctx) |
493 | coro_destroy (coro_context *ctx) |
217 | { |
494 | { |
… | |
… | |
224 | } |
501 | } |
225 | |
502 | |
226 | pthread_cond_destroy (&ctx->cv); |
503 | pthread_cond_destroy (&ctx->cv); |
227 | } |
504 | } |
228 | |
505 | |
229 | #endif |
506 | /*****************************************************************************/ |
|
|
507 | /* fiber backend */ |
|
|
508 | /*****************************************************************************/ |
|
|
509 | #elif CORO_FIBER |
230 | |
510 | |
231 | /* initialize a machine state */ |
511 | #define WIN32_LEAN_AND_MEAN |
|
|
512 | #if _WIN32_WINNT < 0x0400 |
|
|
513 | #undef _WIN32_WINNT |
|
|
514 | #define _WIN32_WINNT 0x0400 |
|
|
515 | #endif |
|
|
516 | #include <windows.h> |
|
|
517 | |
|
|
518 | VOID CALLBACK |
|
|
519 | coro_init (PVOID arg) |
|
|
520 | { |
|
|
521 | coro_context *ctx = (coro_context *)arg; |
|
|
522 | |
|
|
523 | ctx->coro (ctx->arg); |
|
|
524 | } |
|
|
525 | |
232 | void |
526 | void |
|
|
527 | coro_transfer (coro_context *prev, coro_context *next) |
|
|
528 | { |
|
|
529 | if (!prev->fiber) |
|
|
530 | { |
|
|
531 | prev->fiber = GetCurrentFiber (); |
|
|
532 | |
|
|
533 | if (prev->fiber == 0 || prev->fiber == (void *)0x1e00) |
|
|
534 | prev->fiber = ConvertThreadToFiber (0); |
|
|
535 | } |
|
|
536 | |
|
|
537 | SwitchToFiber (next->fiber); |
|
|
538 | } |
|
|
539 | |
|
|
540 | void |
233 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
541 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
234 | { |
542 | { |
235 | #if CORO_UCONTEXT |
543 | ctx->fiber = 0; |
|
|
544 | ctx->coro = coro; |
|
|
545 | ctx->arg = arg; |
236 | |
546 | |
237 | if (!coro) |
547 | if (!coro) |
238 | return; |
548 | return; |
239 | |
549 | |
240 | getcontext (&(ctx->uc)); |
550 | ctx->fiber = CreateFiber (ssize, coro_init, ctx); |
|
|
551 | } |
241 | |
552 | |
242 | ctx->uc.uc_link = 0; |
553 | void |
243 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
554 | coro_destroy (coro_context *ctx) |
244 | ctx->uc.uc_stack.ss_size = (size_t)STACK_ADJUST_SIZE (sptr,ssize); |
555 | { |
245 | ctx->uc.uc_stack.ss_flags = 0; |
556 | DeleteFiber (ctx->fiber); |
|
|
557 | } |
246 | |
558 | |
247 | makecontext (&(ctx->uc), (void (*)())coro, 1, arg); |
559 | #else |
|
|
560 | #error unsupported backend |
|
|
561 | #endif |
248 | |
562 | |
249 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
563 | /*****************************************************************************/ |
|
|
564 | /* stack management */ |
|
|
565 | /*****************************************************************************/ |
|
|
566 | #if CORO_STACKALLOC |
250 | |
567 | |
251 | # if CORO_SJLJ |
568 | #include <stdlib.h> |
252 | stack_t ostk, nstk; |
569 | |
253 | struct sigaction osa, nsa; |
570 | #ifndef _WIN32 |
254 | sigset_t nsig, osig; |
571 | # include <unistd.h> |
|
|
572 | #endif |
|
|
573 | |
|
|
574 | #if CORO_USE_VALGRIND |
|
|
575 | # include <valgrind/valgrind.h> |
|
|
576 | #endif |
|
|
577 | |
|
|
578 | #if _POSIX_MAPPED_FILES |
|
|
579 | # include <sys/mman.h> |
|
|
580 | # define CORO_MMAP 1 |
|
|
581 | # ifndef MAP_ANONYMOUS |
|
|
582 | # ifdef MAP_ANON |
|
|
583 | # define MAP_ANONYMOUS MAP_ANON |
|
|
584 | # else |
|
|
585 | # undef CORO_MMAP |
255 | # endif |
586 | # endif |
256 | coro_context nctx; |
587 | # endif |
|
|
588 | # include <limits.h> |
|
|
589 | #else |
|
|
590 | # undef CORO_MMAP |
|
|
591 | #endif |
257 | |
592 | |
258 | if (!coro) |
593 | #if _POSIX_MEMORY_PROTECTION |
259 | return; |
594 | # ifndef CORO_GUARDPAGES |
|
|
595 | # define CORO_GUARDPAGES 4 |
|
|
596 | # endif |
|
|
597 | #else |
|
|
598 | # undef CORO_GUARDPAGES |
|
|
599 | #endif |
260 | |
600 | |
261 | coro_init_func = coro; |
601 | #if !CORO_MMAP |
262 | coro_init_arg = arg; |
602 | # undef CORO_GUARDPAGES |
|
|
603 | #endif |
263 | |
604 | |
264 | new_coro = ctx; |
605 | #if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 |
265 | create_coro = &nctx; |
606 | # undef CORO_GUARDPAGES |
|
|
607 | #endif |
266 | |
608 | |
267 | # if CORO_SJLJ |
609 | #ifndef CORO_GUARDPAGES |
268 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
610 | # define CORO_GUARDPAGES 0 |
|
|
611 | #endif |
269 | |
612 | |
270 | sigemptyset (&nsig); |
613 | #if !PAGESIZE |
271 | sigaddset (&nsig, SIGUSR2); |
614 | #if !CORO_MMAP |
272 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
615 | #define PAGESIZE 4096 |
273 | |
616 | #else |
274 | nsa.sa_handler = trampoline; |
617 | static size_t |
275 | sigemptyset (&nsa.sa_mask); |
618 | coro_pagesize (void) |
276 | nsa.sa_flags = SA_ONSTACK; |
|
|
277 | |
|
|
278 | if (sigaction (SIGUSR2, &nsa, &osa)) |
|
|
279 | { |
619 | { |
280 | perror ("sigaction"); |
620 | static size_t pagesize; |
281 | abort (); |
621 | |
|
|
622 | if (!pagesize) |
|
|
623 | pagesize = sysconf (_SC_PAGESIZE); |
|
|
624 | |
|
|
625 | return pagesize; |
282 | } |
626 | } |
283 | |
627 | |
284 | /* set the new stack */ |
628 | #define PAGESIZE coro_pagesize () |
285 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
629 | #endif |
286 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
630 | #endif |
287 | nstk.ss_flags = 0; |
|
|
288 | |
631 | |
289 | if (sigaltstack (&nstk, &ostk) < 0) |
632 | int |
290 | { |
633 | coro_stack_alloc (struct coro_stack *stack, unsigned int size) |
291 | perror ("sigaltstack"); |
634 | { |
292 | abort (); |
635 | if (!size) |
293 | } |
636 | size = 256 * 1024; |
294 | |
637 | |
295 | trampoline_count = 0; |
638 | stack->sptr = 0; |
296 | kill (getpid (), SIGUSR2); |
639 | stack->ssze = ((size_t)size * sizeof (void *) + PAGESIZE - 1) / PAGESIZE * PAGESIZE; |
297 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
|
|
298 | |
640 | |
299 | while (!trampoline_count) |
641 | #if CORO_FIBER |
300 | sigsuspend (&nsig); |
|
|
301 | |
642 | |
302 | sigaltstack (0, &nstk); |
643 | stack->sptr = (void *)stack; |
303 | nstk.ss_flags = SS_DISABLE; |
644 | return 1; |
304 | if (sigaltstack (&nstk, 0) < 0) |
|
|
305 | perror ("sigaltstack"); |
|
|
306 | |
645 | |
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 |
646 | #else |
334 | # error "microsoft libc or architecture not supported" |
647 | |
|
|
648 | size_t ssze = stack->ssze + CORO_GUARDPAGES * PAGESIZE; |
|
|
649 | void *base; |
|
|
650 | |
|
|
651 | #if CORO_MMAP |
|
|
652 | /* mmap supposedly does allocate-on-write for us */ |
|
|
653 | base = mmap (0, ssze, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
|
|
654 | |
|
|
655 | if (base == (void *)-1) |
|
|
656 | { |
|
|
657 | /* some systems don't let us have executable heap */ |
|
|
658 | /* we assume they won't need executable stack in that case */ |
|
|
659 | base = mmap (0, ssze, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
|
|
660 | |
|
|
661 | if (base == (void *)-1) |
|
|
662 | return 0; |
|
|
663 | } |
|
|
664 | |
|
|
665 | #if CORO_GUARDPAGES |
|
|
666 | mprotect (base, CORO_GUARDPAGES * PAGESIZE, PROT_NONE); |
|
|
667 | #endif |
|
|
668 | |
|
|
669 | base = (void*)((char *)base + CORO_GUARDPAGES * PAGESIZE); |
|
|
670 | #else |
|
|
671 | base = malloc (ssze); |
|
|
672 | if (!base) |
|
|
673 | return 0; |
335 | #endif |
674 | #endif |
336 | |
675 | |
337 | # elif CORO_LINUX |
676 | #if CORO_USE_VALGRIND |
|
|
677 | stack->valgrind_id = VALGRIND_STACK_REGISTER ((char *)base, (char *)ssze - CORO_GUARDPAGES * PAGESIZE); |
|
|
678 | #endif |
338 | |
679 | |
339 | _setjmp (ctx->env); |
680 | stack->sptr = base; |
340 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
681 | return 1; |
341 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
682 | |
342 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
683 | #endif |
343 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
684 | } |
344 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
685 | |
345 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); |
686 | void |
346 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
687 | coro_stack_free (struct coro_stack *stack) |
347 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
688 | { |
348 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
689 | #if CORO_FIBER |
349 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
690 | /* nop */ |
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 |
691 | #else |
353 | # error "linux libc or architecture not supported" |
692 | #if CORO_USE_VALGRIND |
|
|
693 | VALGRIND_STACK_DEREGISTER (stack->valgrind_id); |
354 | #endif |
694 | #endif |
355 | |
695 | |
356 | # elif CORO_IRIX |
696 | #if CORO_MMAP |
357 | |
697 | if (stack->sptr) |
358 | setjmp (ctx->env); |
698 | munmap ((void*)((char *)stack->sptr - CORO_GUARDPAGES * PAGESIZE), |
359 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
699 | stack->ssze + CORO_GUARDPAGES * PAGESIZE); |
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); |
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365 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
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366 | *--ctx->sp = (void *)coro_init; |
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367 | ctx->sp -= NUM_SAVED; |
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368 | |
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369 | # endif |
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370 | |
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371 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
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372 | |
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373 | # elif CORO_PTHREAD |
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374 | |
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375 | static coro_context nctx; |
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376 | static int once; |
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377 | |
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378 | if (!once) |
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379 | { |
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380 | once = 1; |
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381 | |
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382 | pthread_mutex_lock (&coro_mutex); |
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383 | pthread_cond_init (&nctx.cv, 0); |
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384 | null_tid = pthread_self (); |
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385 | } |
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386 | |
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387 | pthread_cond_init (&ctx->cv, 0); |
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388 | |
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389 | if (coro) |
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390 | { |
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391 | pthread_attr_t attr; |
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392 | struct coro_init_args args; |
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393 | |
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394 | args.func = coro; |
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395 | args.arg = arg; |
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396 | args.self = ctx; |
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397 | args.main = &nctx; |
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398 | |
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399 | pthread_attr_init (&attr); |
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400 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
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401 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
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402 | pthread_create (&ctx->id, &attr, trampoline, &args); |
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403 | |
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404 | coro_transfer (args.main, args.self); |
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405 | } |
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406 | else |
700 | #else |
407 | ctx->id = null_tid; |
701 | free (stack->sptr); |
408 | |
|
|
409 | #else |
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410 | # error unsupported backend |
|
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411 | #endif |
702 | #endif |
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703 | #endif |
412 | } |
704 | } |
413 | |
705 | |
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|
706 | #endif |
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707 | |