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, |
… | |
… | |
40 | |
40 | |
41 | #include "coro.h" |
41 | #include "coro.h" |
42 | |
42 | |
43 | #include <string.h> |
43 | #include <string.h> |
44 | |
44 | |
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45 | /*****************************************************************************/ |
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46 | /* ucontext/setjmp/asm backends */ |
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47 | /*****************************************************************************/ |
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48 | #if CORO_UCONTEXT || CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
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49 | |
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50 | # if CORO_UCONTEXT |
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51 | # include <stddef.h> |
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52 | # endif |
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53 | |
45 | #if !defined(STACK_ADJUST_PTR) |
54 | # if !defined(STACK_ADJUST_PTR) |
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55 | # if __sgi |
46 | /* IRIX is decidedly NON-unix */ |
56 | /* IRIX is decidedly NON-unix */ |
47 | # if __sgi |
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48 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
57 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
49 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
58 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
50 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
59 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
51 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
60 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
52 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
61 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
53 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
62 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
54 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
63 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
55 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
64 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
56 | # else |
65 | # else |
57 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
66 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
58 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
67 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
59 | # endif |
68 | # endif |
60 | #endif |
69 | # endif |
61 | |
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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 | |
70 | |
68 | # include <stdlib.h> |
71 | # include <stdlib.h> |
69 | |
72 | |
70 | # if CORO_SJLJ |
73 | # if CORO_SJLJ |
71 | # include <stdio.h> |
74 | # include <stdio.h> |
72 | # include <signal.h> |
75 | # include <signal.h> |
73 | # include <unistd.h> |
76 | # include <unistd.h> |
74 | # endif |
77 | # endif |
75 | |
78 | |
76 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
77 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
78 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
79 | |
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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 | |
82 | |
86 | static void |
83 | static void |
87 | coro_init (void) |
84 | coro_init (void) |
88 | { |
85 | { |
89 | volatile coro_func func = coro_init_func; |
86 | volatile coro_func func = coro_init_func; |
90 | volatile void *arg = coro_init_arg; |
87 | volatile void *arg = coro_init_arg; |
91 | |
88 | |
92 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
89 | coro_transfer (new_coro, create_coro); |
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90 | |
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91 | #if __linux && __amd64 |
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92 | /* we blindly assume on any __linux with __amd64 we have a new enough gas with .cfi_undefined support */ |
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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)) |
109 | { |
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110 | # if HAVE_CFI |
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111 | asm (".cfi_startproc"); |
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112 | # endif |
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113 | coro_init (); /* start it */ |
111 | coro_init (); /* start it */ |
114 | # if HAVE_CFI |
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115 | asm (".cfi_endproc"); |
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116 | # endif |
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117 | } |
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118 | else |
112 | else |
119 | trampoline_count++; |
113 | trampoline_done = 1; |
120 | } |
114 | } |
121 | |
115 | |
122 | # endif |
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123 | |
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124 | #endif |
116 | # endif |
125 | |
117 | |
126 | #if CORO_ASM |
118 | # if CORO_ASM |
127 | |
119 | |
128 | asm ( |
120 | asm ( |
129 | ".text\n" |
121 | ".text\n" |
130 | ".globl coro_transfer\n" |
122 | ".globl coro_transfer\n" |
131 | ".type coro_transfer, @function\n" |
123 | ".type coro_transfer, @function\n" |
132 | "coro_transfer:\n" |
124 | "coro_transfer:\n" |
133 | # if __amd64 |
125 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
134 | # define NUM_SAVED 6 |
126 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
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127 | #if __amd64 |
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128 | #ifdef _WIN32 |
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129 | #define NUM_SAVED 8 |
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130 | "\tpush %rsi\n" |
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131 | "\tpush %rdi\n" |
135 | "\tpush %rbp\n" |
132 | "\tpush %rbp\n" |
136 | "\tpush %rbx\n" |
133 | "\tpush %rbx\n" |
137 | "\tpush %r12\n" |
134 | "\tpush %r12\n" |
138 | "\tpush %r13\n" |
135 | "\tpush %r13\n" |
139 | "\tpush %r14\n" |
136 | "\tpush %r14\n" |
140 | "\tpush %r15\n" |
137 | "\tpush %r15\n" |
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138 | #if CORO_WIN_TIB |
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139 | "\tpush %gs:0x0\n" |
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140 | "\tpush %gs:0x8\n" |
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141 | "\tpush %gs:0xc\n" |
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142 | #endif |
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143 | "\tmov %rsp, (%rcx)\n" |
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144 | "\tmov (%rdx), %rsp\n" |
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145 | #if CORO_WIN_TIB |
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146 | "\tpop %gs:0xc\n" |
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147 | "\tpop %gs:0x8\n" |
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148 | "\tpop %gs:0x0\n" |
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149 | #endif |
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150 | "\tpop %r15\n" |
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151 | "\tpop %r14\n" |
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152 | "\tpop %r13\n" |
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153 | "\tpop %r12\n" |
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154 | "\tpop %rbx\n" |
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155 | "\tpop %rbp\n" |
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156 | "\tpop %rdi\n" |
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157 | "\tpop %rsi\n" |
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158 | #else |
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159 | #define NUM_SAVED 6 |
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160 | "\tpush %rbp\n" |
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161 | "\tpush %rbx\n" |
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162 | "\tpush %r12\n" |
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163 | "\tpush %r13\n" |
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164 | "\tpush %r14\n" |
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165 | "\tpush %r15\n" |
141 | "\tmov %rsp, (%rdi)\n" |
166 | "\tmov %rsp, (%rdi)\n" |
142 | "\tmov (%rsi), %rsp\n" |
167 | "\tmov (%rsi), %rsp\n" |
143 | "\tpop %r15\n" |
168 | "\tpop %r15\n" |
144 | "\tpop %r14\n" |
169 | "\tpop %r14\n" |
145 | "\tpop %r13\n" |
170 | "\tpop %r13\n" |
146 | "\tpop %r12\n" |
171 | "\tpop %r12\n" |
147 | "\tpop %rbx\n" |
172 | "\tpop %rbx\n" |
148 | "\tpop %rbp\n" |
173 | "\tpop %rbp\n" |
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174 | #endif |
149 | # elif __i386 |
175 | #elif __i386 |
150 | # define NUM_SAVED 4 |
176 | #define NUM_SAVED 4 |
151 | "\tpush %ebp\n" |
177 | "\tpush %ebp\n" |
152 | "\tpush %ebx\n" |
178 | "\tpush %ebx\n" |
153 | "\tpush %esi\n" |
179 | "\tpush %esi\n" |
154 | "\tpush %edi\n" |
180 | "\tpush %edi\n" |
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181 | #if CORO_WIN_TIB |
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182 | "\tpush %fs:0\n" |
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183 | "\tpush %fs:4\n" |
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184 | "\tpush %fs:8\n" |
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185 | #endif |
155 | "\tmov %esp, (%eax)\n" |
186 | "\tmov %esp, (%eax)\n" |
156 | "\tmov (%edx), %esp\n" |
187 | "\tmov (%edx), %esp\n" |
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188 | #if CORO_WIN_TIB |
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189 | "\tpop %fs:8\n" |
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190 | "\tpop %fs:4\n" |
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191 | "\tpop %fs:0\n" |
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192 | #endif |
157 | "\tpop %edi\n" |
193 | "\tpop %edi\n" |
158 | "\tpop %esi\n" |
194 | "\tpop %esi\n" |
159 | "\tpop %ebx\n" |
195 | "\tpop %ebx\n" |
160 | "\tpop %ebp\n" |
196 | "\tpop %ebp\n" |
161 | # else |
197 | #else |
162 | # error unsupported architecture |
198 | #error unsupported architecture |
163 | # endif |
199 | #endif |
164 | "\tret\n" |
200 | "\tret\n" |
165 | ); |
201 | ); |
166 | |
202 | |
167 | #endif |
203 | # endif |
168 | |
204 | |
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205 | void |
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206 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
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207 | { |
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208 | coro_context nctx; |
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209 | # if CORO_SJLJ |
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210 | stack_t ostk, nstk; |
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211 | struct sigaction osa, nsa; |
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212 | sigset_t nsig, osig; |
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213 | # endif |
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214 | |
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215 | if (!coro) |
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216 | return; |
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217 | |
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218 | coro_init_func = coro; |
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219 | coro_init_arg = arg; |
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220 | |
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221 | new_coro = ctx; |
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222 | create_coro = &nctx; |
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223 | |
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224 | # if CORO_SJLJ |
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225 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
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226 | |
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227 | sigemptyset (&nsig); |
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228 | sigaddset (&nsig, SIGUSR2); |
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229 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
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230 | |
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231 | nsa.sa_handler = trampoline; |
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232 | sigemptyset (&nsa.sa_mask); |
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233 | nsa.sa_flags = SA_ONSTACK; |
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234 | |
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235 | if (sigaction (SIGUSR2, &nsa, &osa)) |
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236 | { |
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237 | perror ("sigaction"); |
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238 | abort (); |
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239 | } |
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240 | |
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241 | /* set the new stack */ |
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242 | nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */ |
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243 | nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize); |
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244 | nstk.ss_flags = 0; |
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245 | |
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246 | if (sigaltstack (&nstk, &ostk) < 0) |
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247 | { |
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248 | perror ("sigaltstack"); |
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249 | abort (); |
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250 | } |
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251 | |
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252 | trampoline_done = 0; |
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253 | kill (getpid (), SIGUSR2); |
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254 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
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255 | |
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256 | while (!trampoline_done) |
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257 | sigsuspend (&nsig); |
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258 | |
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259 | sigaltstack (0, &nstk); |
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260 | nstk.ss_flags = SS_DISABLE; |
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261 | if (sigaltstack (&nstk, 0) < 0) |
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262 | perror ("sigaltstack"); |
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263 | |
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264 | sigaltstack (0, &nstk); |
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265 | if (~nstk.ss_flags & SS_DISABLE) |
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266 | abort (); |
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267 | |
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268 | if (~ostk.ss_flags & SS_DISABLE) |
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269 | sigaltstack (&ostk, 0); |
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270 | |
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271 | sigaction (SIGUSR2, &osa, 0); |
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272 | sigprocmask (SIG_SETMASK, &osig, 0); |
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273 | |
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274 | # elif CORO_LOSER |
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275 | |
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276 | coro_setjmp (ctx->env); |
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277 | #if __CYGWIN__ && __i386 |
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278 | ctx->env[8] = (long) coro_init; |
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279 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
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280 | #elif __CYGWIN__ && __x86_64 |
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281 | ctx->env[7] = (long) coro_init; |
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282 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
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283 | #elif defined(__MINGW32__) |
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284 | ctx->env[5] = (long) coro_init; |
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285 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
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286 | #elif defined(_M_IX86) |
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287 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
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288 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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289 | #elif defined(_M_AMD64) |
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290 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
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291 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
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292 | #elif defined(_M_IA64) |
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293 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
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294 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
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295 | #else |
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296 | #error "microsoft libc or architecture not supported" |
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297 | #endif |
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298 | |
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299 | # elif CORO_LINUX |
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300 | |
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301 | coro_setjmp (ctx->env); |
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302 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
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303 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
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304 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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305 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
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306 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
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307 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
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308 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
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309 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
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310 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
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311 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
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312 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
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313 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
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314 | #else |
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315 | #error "linux libc or architecture not supported" |
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316 | #endif |
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317 | |
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318 | # elif CORO_IRIX |
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319 | |
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320 | coro_setjmp (ctx->env, 0); |
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321 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
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322 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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323 | |
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324 | # elif CORO_ASM |
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325 | |
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326 | ctx->sp = (void **)(ssize + (char *)sptr); |
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327 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
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328 | *--ctx->sp = (void *)coro_init; |
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329 | |
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330 | #if CORO_WIN_TIB |
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331 | *--ctx->sp = 0; /* ExceptionList */ |
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332 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
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333 | *--ctx->sp = sptr; /* StackLimit */ |
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334 | #endif |
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335 | |
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336 | ctx->sp -= NUM_SAVED; |
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337 | memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED); |
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338 | |
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339 | # elif CORO_UCONTEXT |
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340 | |
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341 | getcontext (&(ctx->uc)); |
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342 | |
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343 | ctx->uc.uc_link = 0; |
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344 | ctx->uc.uc_stack.ss_sp = sptr; |
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345 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
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346 | ctx->uc.uc_stack.ss_flags = 0; |
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347 | |
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348 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
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349 | |
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350 | # endif |
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351 | |
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352 | coro_transfer (create_coro, new_coro); |
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353 | } |
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354 | |
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355 | /*****************************************************************************/ |
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356 | /* pthread backend */ |
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357 | /*****************************************************************************/ |
169 | #if CORO_PTHREAD |
358 | #elif CORO_PTHREAD |
170 | |
359 | |
171 | /* this mutex will be locked by the running coroutine */ |
360 | /* this mutex will be locked by the running coroutine */ |
172 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
361 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
173 | |
362 | |
174 | struct coro_init_args |
363 | struct coro_init_args |
… | |
… | |
186 | { |
375 | { |
187 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
376 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
188 | } |
377 | } |
189 | |
378 | |
190 | static void * |
379 | static void * |
191 | trampoline (void *args_) |
380 | coro_init (void *args_) |
192 | { |
381 | { |
193 | struct coro_init_args *args = (struct coro_init_args *)args_; |
382 | struct coro_init_args *args = (struct coro_init_args *)args_; |
194 | coro_func func = args->func; |
383 | coro_func func = args->func; |
195 | void *arg = args->arg; |
384 | void *arg = args->arg; |
196 | |
385 | |
… | |
… | |
208 | void |
397 | void |
209 | coro_transfer (coro_context *prev, coro_context *next) |
398 | coro_transfer (coro_context *prev, coro_context *next) |
210 | { |
399 | { |
211 | pthread_cond_signal (&next->cv); |
400 | pthread_cond_signal (&next->cv); |
212 | pthread_cond_wait (&prev->cv, &coro_mutex); |
401 | pthread_cond_wait (&prev->cv, &coro_mutex); |
|
|
402 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
|
|
403 | pthread_testcancel (); |
|
|
404 | #endif |
|
|
405 | } |
|
|
406 | |
|
|
407 | void |
|
|
408 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
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409 | { |
|
|
410 | static coro_context nctx; |
|
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411 | static int once; |
|
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412 | |
|
|
413 | if (!once) |
|
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414 | { |
|
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415 | once = 1; |
|
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416 | |
|
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417 | pthread_mutex_lock (&coro_mutex); |
|
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418 | pthread_cond_init (&nctx.cv, 0); |
|
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419 | null_tid = pthread_self (); |
|
|
420 | } |
|
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421 | |
|
|
422 | pthread_cond_init (&ctx->cv, 0); |
|
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423 | |
|
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424 | if (coro) |
|
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425 | { |
|
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426 | pthread_attr_t attr; |
|
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427 | struct coro_init_args args; |
|
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428 | |
|
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429 | args.func = coro; |
|
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430 | args.arg = arg; |
|
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431 | args.self = ctx; |
|
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432 | args.main = &nctx; |
|
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433 | |
|
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434 | pthread_attr_init (&attr); |
|
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435 | #if __UCLIBC__ |
|
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436 | /* exists, but is borked */ |
|
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437 | /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ |
|
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438 | #else |
|
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439 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
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440 | #endif |
|
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441 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
|
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442 | pthread_create (&ctx->id, &attr, coro_init, &args); |
|
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443 | |
|
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444 | coro_transfer (args.main, args.self); |
|
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445 | } |
|
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446 | else |
|
|
447 | ctx->id = null_tid; |
213 | } |
448 | } |
214 | |
449 | |
215 | void |
450 | void |
216 | coro_destroy (coro_context *ctx) |
451 | coro_destroy (coro_context *ctx) |
217 | { |
452 | { |
… | |
… | |
224 | } |
459 | } |
225 | |
460 | |
226 | pthread_cond_destroy (&ctx->cv); |
461 | pthread_cond_destroy (&ctx->cv); |
227 | } |
462 | } |
228 | |
463 | |
229 | #endif |
|
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230 | |
|
|
231 | /* initialize a machine state */ |
|
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232 | void |
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233 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
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234 | { |
|
|
235 | #if CORO_UCONTEXT |
|
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236 | |
|
|
237 | if (!coro) |
|
|
238 | return; |
|
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239 | |
|
|
240 | getcontext (&(ctx->uc)); |
|
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241 | |
|
|
242 | ctx->uc.uc_link = 0; |
|
|
243 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
|
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244 | ctx->uc.uc_stack.ss_size = (size_t)STACK_ADJUST_SIZE (sptr,ssize); |
|
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245 | ctx->uc.uc_stack.ss_flags = 0; |
|
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246 | |
|
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247 | makecontext (&(ctx->uc), (void (*)())coro, 1, arg); |
|
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248 | |
|
|
249 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
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250 | |
|
|
251 | # if CORO_SJLJ |
|
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252 | stack_t ostk, nstk; |
|
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253 | struct sigaction osa, nsa; |
|
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254 | sigset_t nsig, osig; |
|
|
255 | # endif |
|
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256 | coro_context nctx; |
|
|
257 | |
|
|
258 | if (!coro) |
|
|
259 | return; |
|
|
260 | |
|
|
261 | coro_init_func = coro; |
|
|
262 | coro_init_arg = arg; |
|
|
263 | |
|
|
264 | new_coro = ctx; |
|
|
265 | create_coro = &nctx; |
|
|
266 | |
|
|
267 | # if CORO_SJLJ |
|
|
268 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
|
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269 | |
|
|
270 | sigemptyset (&nsig); |
|
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271 | sigaddset (&nsig, SIGUSR2); |
|
|
272 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
|
|
273 | |
|
|
274 | nsa.sa_handler = trampoline; |
|
|
275 | sigemptyset (&nsa.sa_mask); |
|
|
276 | nsa.sa_flags = SA_ONSTACK; |
|
|
277 | |
|
|
278 | if (sigaction (SIGUSR2, &nsa, &osa)) |
|
|
279 | { |
|
|
280 | perror ("sigaction"); |
|
|
281 | abort (); |
|
|
282 | } |
|
|
283 | |
|
|
284 | /* set the new stack */ |
|
|
285 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
|
|
286 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
|
|
287 | nstk.ss_flags = 0; |
|
|
288 | |
|
|
289 | if (sigaltstack (&nstk, &ostk) < 0) |
|
|
290 | { |
|
|
291 | perror ("sigaltstack"); |
|
|
292 | abort (); |
|
|
293 | } |
|
|
294 | |
|
|
295 | trampoline_count = 0; |
|
|
296 | kill (getpid (), SIGUSR2); |
|
|
297 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
|
|
298 | |
|
|
299 | while (!trampoline_count) |
|
|
300 | sigsuspend (&nsig); |
|
|
301 | |
|
|
302 | sigaltstack (0, &nstk); |
|
|
303 | nstk.ss_flags = SS_DISABLE; |
|
|
304 | if (sigaltstack (&nstk, 0) < 0) |
|
|
305 | perror ("sigaltstack"); |
|
|
306 | |
|
|
307 | sigaltstack (0, &nstk); |
|
|
308 | if (~nstk.ss_flags & SS_DISABLE) |
|
|
309 | abort (); |
|
|
310 | |
|
|
311 | if (~ostk.ss_flags & SS_DISABLE) |
|
|
312 | sigaltstack (&ostk, 0); |
|
|
313 | |
|
|
314 | sigaction (SIGUSR2, &osa, 0); |
|
|
315 | |
|
|
316 | sigprocmask (SIG_SETMASK, &osig, 0); |
|
|
317 | |
|
|
318 | # elif CORO_LOSER |
|
|
319 | |
|
|
320 | setjmp (ctx->env); |
|
|
321 | #if __CYGWIN__ |
|
|
322 | ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); |
|
|
323 | ctx->env[8] = (long)coro_init; |
|
|
324 | #elif defined(_M_IX86) |
|
|
325 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
|
|
326 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
327 | #elif defined(_M_AMD64) |
|
|
328 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
|
|
329 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
330 | #elif defined(_M_IA64) |
|
|
331 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
|
|
332 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
333 | #else |
|
|
334 | # error "microsoft libc or architecture not supported" |
|
|
335 | #endif |
|
|
336 | |
|
|
337 | # elif CORO_LINUX |
|
|
338 | |
|
|
339 | _setjmp (ctx->env); |
|
|
340 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
|
|
341 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
342 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
343 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
|
|
344 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
|
|
345 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); |
|
|
346 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
|
|
347 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
|
|
348 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
|
|
349 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
|
|
350 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
351 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
|
|
352 | #else |
|
|
353 | # error "linux libc or architecture not supported" |
|
|
354 | #endif |
|
|
355 | |
|
|
356 | # elif CORO_IRIX |
|
|
357 | |
|
|
358 | setjmp (ctx->env); |
|
|
359 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
360 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
361 | |
|
|
362 | # elif CORO_ASM |
|
|
363 | |
|
|
364 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
|
|
365 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
|
|
366 | *--ctx->sp = (void *)coro_init; |
|
|
367 | ctx->sp -= NUM_SAVED; |
|
|
368 | |
|
|
369 | # endif |
|
|
370 | |
|
|
371 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
|
|
372 | |
|
|
373 | # elif CORO_PTHREAD |
|
|
374 | |
|
|
375 | static coro_context nctx; |
|
|
376 | static int once; |
|
|
377 | |
|
|
378 | if (!once) |
|
|
379 | { |
|
|
380 | once = 1; |
|
|
381 | |
|
|
382 | pthread_mutex_lock (&coro_mutex); |
|
|
383 | pthread_cond_init (&nctx.cv, 0); |
|
|
384 | null_tid = pthread_self (); |
|
|
385 | } |
|
|
386 | |
|
|
387 | pthread_cond_init (&ctx->cv, 0); |
|
|
388 | |
|
|
389 | if (coro) |
|
|
390 | { |
|
|
391 | pthread_attr_t attr; |
|
|
392 | struct coro_init_args args; |
|
|
393 | |
|
|
394 | args.func = coro; |
|
|
395 | args.arg = arg; |
|
|
396 | args.self = ctx; |
|
|
397 | args.main = &nctx; |
|
|
398 | |
|
|
399 | pthread_attr_init (&attr); |
|
|
400 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
|
401 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
|
|
402 | pthread_create (&ctx->id, &attr, trampoline, &args); |
|
|
403 | |
|
|
404 | coro_transfer (args.main, args.self); |
|
|
405 | } |
|
|
406 | else |
|
|
407 | ctx->id = null_tid; |
|
|
408 | |
|
|
409 | #else |
464 | #else |
410 | # error unsupported backend |
465 | # error unsupported backend |
411 | #endif |
466 | #endif |
412 | } |
|
|
413 | |
467 | |