1 /* context_raw - context switching with ucontextes from System V */
3 /* Copyright (c) 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "xbt/threadpool.h"
10 #include "simix/private.h"
12 #ifdef HAVE_VALGRIND_VALGRIND_H
13 # include <valgrind/valgrind.h>
14 #endif /* HAVE_VALGRIND_VALGRIND_H */
17 #include "win32_ucontext.h"
18 #include "win32_ucontext.c"
23 /* lower this if you want to reduce the memory consumption */
24 #ifndef CONTEXT_STACK_SIZE /* allow lua to override this */
25 #define CONTEXT_STACK_SIZE 128*1024
26 #endif /*CONTEXT_STACK_SIZE */
29 typedef char * raw_stack_t;
30 typedef void (*rawctx_entry_point_t)(void *);
32 typedef struct s_smx_ctx_raw {
33 s_smx_ctx_base_t super; /* Fields of super implementation */
34 char *malloced_stack; /* malloced area containing the stack */
35 raw_stack_t stack_top; /* pointer to stack top (within previous area) */
36 #ifdef HAVE_VALGRIND_VALGRIND_H
37 unsigned int valgrind_stack_id; /* the valgrind stack id */
39 } s_smx_ctx_raw_t, *smx_ctx_raw_t;
41 smx_ctx_raw_t maestro_context;
43 extern raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
44 rawctx_entry_point_t entry_point, void* arg);
45 extern void raw_swapcontext(raw_stack_t* old, raw_stack_t* new);
49 ".globl raw_makecontext\n"
51 " movl 4(%esp),%eax\n" /* stack */
52 " addl 8(%esp),%eax\n" /* size */
53 " movl 12(%esp),%ecx\n" /* func */
54 " movl 16(%esp),%edx\n" /* arg */
55 " movl %edx, -4(%eax)\n"
56 " movl $0, -8(%eax)\n" /* @return for func */
57 " movl %ecx,-12(%eax)\n"
58 " movl $0, -16(%eax)\n" /* ebp */
59 " movl $0, -20(%eax)\n" /* ebx */
60 " movl $0, -24(%eax)\n" /* esi */
61 " movl $0, -28(%eax)\n" /* edi */
67 ".globl raw_swapcontext\n"
69 " movl 4(%esp),%eax\n" /* old */
70 " movl 8(%esp),%edx\n" /* new */
83 #elif PROCESSOR_x86_64
85 ".globl raw_makecontext\n"
86 "raw_makecontext:\n" /* Calling convention sets the arguments in rdi, rsi, rdx and rcx, respectively */
87 " movq %rdi,%rax\n" /* stack */
88 " addq %rsi,%rax\n" /* size */
89 " movq $0, -8(%rax)\n" /* @return for func */
90 " movq %rdx,-16(%rax)\n" /* func */
91 " movq %rcx,-24(%rax)\n" /* arg/rdi */
92 " movq $0, -32(%rax)\n" /* rsi */
93 " movq $0, -40(%rax)\n" /* rdx */
94 " movq $0, -48(%rax)\n" /* rcx */
95 " movq $0, -56(%rax)\n" /* r8 */
96 " movq $0, -64(%rax)\n" /* r9 */
97 " movq $0, -72(%rax)\n" /* rbp */
98 " movq $0, -80(%rax)\n" /* rbx */
99 " movq $0, -88(%rax)\n" /* r12 */
100 " movq $0, -96(%rax)\n" /* r13 */
101 " movq $0, -104(%rax)\n" /* r14 */
102 " movq $0, -112(%rax)\n" /* r15 */
108 ".globl raw_swapcontext\n"
109 "raw_swapcontext:\n" /* Calling convention sets the arguments in rdi and rsi, respectively */
122 " movq %rsp,(%rdi)\n" /* old */
123 " movq (%rsi),%rsp\n" /* new */
139 raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
140 rawctx_entry_point_t entry_point, void* arg) {
144 void raw_swapcontext(raw_stack_t* old, raw_stack_t* new) {
150 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
152 static xbt_tpool_t tpool;
154 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context);
157 static int smx_ctx_raw_factory_finalize(smx_context_factory_t *factory)
160 xbt_tpool_destroy(tpool);
161 return smx_ctx_base_factory_finalize(factory);
165 smx_ctx_raw_create_context_sized(size_t size, xbt_main_func_t code,
166 int argc, char **argv,
167 void_pfn_smxprocess_t cleanup_func,
171 smx_ctx_raw_t context =
172 (smx_ctx_raw_t) smx_ctx_base_factory_create_context_sized(size,
179 /* If the user provided a function for the process then use it
180 otherwise is the context for maestro */
182 context->malloced_stack = xbt_malloc0(CONTEXT_STACK_SIZE);
184 raw_makecontext(context->malloced_stack,CONTEXT_STACK_SIZE,
185 (void(*)(void*))smx_ctx_raw_wrapper,context);
187 #ifdef HAVE_VALGRIND_VALGRIND_H
188 context->valgrind_stack_id =
189 VALGRIND_STACK_REGISTER(context->malloced_stack,
190 context->malloced_stack + CONTEXT_STACK_SIZE);
191 #endif /* HAVE_VALGRIND_VALGRIND_H */
194 maestro_context = context;
197 return (smx_context_t) context;
202 smx_ctx_raw_create_context(xbt_main_func_t code, int argc, char **argv,
203 void_pfn_smxprocess_t cleanup_func,
207 return smx_ctx_raw_create_context_sized(sizeof(s_smx_ctx_raw_t),
208 code, argc, argv, cleanup_func,
213 static void smx_ctx_raw_free(smx_context_t context)
218 #ifdef HAVE_VALGRIND_VALGRIND_H
219 VALGRIND_STACK_DEREGISTER(((smx_ctx_raw_t)
220 context)->valgrind_stack_id);
221 #endif /* HAVE_VALGRIND_VALGRIND_H */
224 smx_ctx_base_free(context);
227 static void smx_ctx_raw_suspend(smx_context_t context)
229 smx_current_context = (smx_context_t)maestro_context;
230 raw_swapcontext(&((smx_ctx_raw_t) context)->stack_top, &maestro_context->stack_top);
233 static void smx_ctx_raw_stop(smx_context_t context)
235 smx_ctx_base_stop(context);
236 smx_ctx_raw_suspend(context);
239 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context)
241 (context->super.code) (context->super.argc, context->super.argv);
243 smx_ctx_raw_stop((smx_context_t) context);
246 static void smx_ctx_raw_resume(smx_context_t context)
248 smx_current_context = context;
249 raw_swapcontext(&maestro_context->stack_top, &((smx_ctx_raw_t) context)->stack_top);
252 static void smx_ctx_raw_runall(xbt_swag_t processes)
254 smx_process_t process;
256 while ((process = xbt_swag_extract(processes)))
257 smx_ctx_raw_resume(process->context);
260 static void smx_ctx_raw_resume_parallel(smx_context_t context)
262 xbt_os_thread_set_extra_data(context);
263 raw_swapcontext(&maestro_context->stack_top, &((smx_ctx_raw_t) context)->stack_top);
266 static void smx_ctx_raw_runall_parallel(xbt_swag_t processes)
268 smx_process_t process;
269 while((process = xbt_swag_extract(processes))){
270 xbt_tpool_queue_job(tpool, (void_f_pvoid_t)smx_ctx_raw_resume_parallel, process->context);
272 xbt_tpool_wait_all(tpool);
275 static smx_context_t smx_ctx_raw_self_parallel(void)
277 smx_context_t self_context = (smx_context_t) xbt_os_thread_get_extra_data();
278 return self_context ? self_context : (smx_context_t) maestro_context;
281 void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
283 smx_ctx_base_factory_init(factory);
285 (*factory)->finalize = smx_ctx_raw_factory_finalize;
286 (*factory)->create_context = smx_ctx_raw_create_context;
287 /* Do not overload that method (*factory)->finalize */
288 (*factory)->free = smx_ctx_raw_free;
289 (*factory)->stop = smx_ctx_raw_stop;
290 (*factory)->suspend = smx_ctx_raw_suspend;
291 (*factory)->name = "smx_raw_context_factory";
293 if(_surf_parallel_contexts){
294 #ifdef CONTEXT_THREADS /* To use parallel ucontexts a thread pool is needed */
295 tpool = xbt_tpool_new(2, 10);
296 (*factory)->runall = smx_ctx_raw_runall_parallel;
297 (*factory)->self = smx_ctx_raw_self_parallel;
299 THROW0(arg_error, 0, "No thread support for parallel context execution");
302 (*factory)->runall = smx_ctx_raw_runall;