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 raw_stack_t old_stack_top; /* to whom I should return the control */
37 #ifdef HAVE_VALGRIND_VALGRIND_H
38 unsigned int valgrind_stack_id; /* the valgrind stack id */
40 } s_smx_ctx_raw_t, *smx_ctx_raw_t;
42 smx_ctx_raw_t maestro_raw_context;
44 extern raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
45 rawctx_entry_point_t entry_point, void* arg);
46 extern void raw_swapcontext(raw_stack_t* old, raw_stack_t new);
51 ".globl raw_makecontext\n"
52 ".type raw_makecontext,@function\n"
54 " movl 4(%esp),%eax\n" /* stack */
55 " addl 8(%esp),%eax\n" /* size */
56 " movl 12(%esp),%ecx\n" /* func */
57 " movl 16(%esp),%edx\n" /* arg */
58 " movl %edx, -4(%eax)\n"
59 " movl $0, -8(%eax)\n" /* @return for func */
60 " movl %ecx,-12(%eax)\n"
61 " movl $0, -16(%eax)\n" /* ebp */
62 " movl $0, -20(%eax)\n" /* ebx */
63 " movl $0, -24(%eax)\n" /* esi */
64 " movl $0, -28(%eax)\n" /* edi */
71 ".globl raw_swapcontext\n"
72 ".type raw_swapcontext,@function\n"
74 " movl 4(%esp),%eax\n" /* old */
75 " movl 8(%esp),%edx\n" /* new */
88 #elif PROCESSOR_x86_64
91 ".globl raw_makecontext\n"
92 ".type raw_makecontext,@function\n"
93 "raw_makecontext:\n" /* Calling convention sets the arguments in rdi, rsi, rdx and rcx, respectively */
94 " movq %rdi,%rax\n" /* stack */
95 " addq %rsi,%rax\n" /* size */
96 " movq $0, -8(%rax)\n" /* @return for func */
97 " movq %rdx,-16(%rax)\n" /* func */
98 " movq %rcx,-24(%rax)\n" /* arg/rdi */
99 " movq $0, -32(%rax)\n" /* rsi */
100 " movq $0, -40(%rax)\n" /* rdx */
101 " movq $0, -48(%rax)\n" /* rcx */
102 " movq $0, -56(%rax)\n" /* r8 */
103 " movq $0, -64(%rax)\n" /* r9 */
104 " movq $0, -72(%rax)\n" /* rbp */
105 " movq $0, -80(%rax)\n" /* rbx */
106 " movq $0, -88(%rax)\n" /* r12 */
107 " movq $0, -96(%rax)\n" /* r13 */
108 " movq $0, -104(%rax)\n" /* r14 */
109 " movq $0, -112(%rax)\n" /* r15 */
116 ".globl raw_swapcontext\n"
117 ".type raw_swapcontext,@function\n"
118 "raw_swapcontext:\n" /* Calling convention sets the arguments in rdi and rsi, respectively */
131 " movq %rsp,(%rdi)\n" /* old */
132 " movq %rsi,%rsp\n" /* new */
148 raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
149 rawctx_entry_point_t entry_point, void* arg) {
153 void raw_swapcontext(raw_stack_t* old, raw_stack_t new) {
159 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
161 static xbt_tpool_t tpool;
163 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context);
166 static int smx_ctx_raw_factory_finalize(smx_context_factory_t *factory)
169 xbt_tpool_destroy(tpool);
170 return smx_ctx_base_factory_finalize(factory);
174 smx_ctx_raw_create_context_sized(size_t size, xbt_main_func_t code,
175 int argc, char **argv,
176 void_pfn_smxprocess_t cleanup_func,
180 smx_ctx_raw_t context =
181 (smx_ctx_raw_t) smx_ctx_base_factory_create_context_sized(size,
188 /* If the user provided a function for the process then use it
189 otherwise is the context for maestro */
191 context->malloced_stack = xbt_malloc0(CONTEXT_STACK_SIZE);
193 raw_makecontext(context->malloced_stack,CONTEXT_STACK_SIZE,
194 (void(*)(void*))smx_ctx_raw_wrapper,context);
196 #ifdef HAVE_VALGRIND_VALGRIND_H
197 context->valgrind_stack_id =
198 VALGRIND_STACK_REGISTER(context->malloced_stack,
199 context->malloced_stack + CONTEXT_STACK_SIZE);
200 #endif /* HAVE_VALGRIND_VALGRIND_H */
203 maestro_raw_context = context;
206 return (smx_context_t) context;
211 smx_ctx_raw_create_context(xbt_main_func_t code, int argc, char **argv,
212 void_pfn_smxprocess_t cleanup_func,
216 return smx_ctx_raw_create_context_sized(sizeof(s_smx_ctx_raw_t),
217 code, argc, argv, cleanup_func,
222 static void smx_ctx_raw_free(smx_context_t context)
227 #ifdef HAVE_VALGRIND_VALGRIND_H
228 VALGRIND_STACK_DEREGISTER(((smx_ctx_raw_t)
229 context)->valgrind_stack_id);
230 #endif /* HAVE_VALGRIND_VALGRIND_H */
233 smx_ctx_base_free(context);
236 static void smx_ctx_raw_suspend(smx_context_t context)
238 smx_current_context = (smx_context_t)maestro_raw_context;
240 &((smx_ctx_raw_t) context)->stack_top,
241 ((smx_ctx_raw_t) context)->old_stack_top);
244 static void smx_ctx_raw_stop(smx_context_t context)
246 smx_ctx_base_stop(context);
247 smx_ctx_raw_suspend(context);
250 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context)
252 (context->super.code) (context->super.argc, context->super.argv);
254 smx_ctx_raw_stop((smx_context_t) context);
257 static void smx_ctx_raw_resume(smx_context_t context)
259 smx_current_context = context;
261 &((smx_ctx_raw_t) context)->old_stack_top,
262 ((smx_ctx_raw_t) context)->stack_top);
265 static void smx_ctx_raw_runall(xbt_swag_t processes)
267 smx_process_t process;
269 while ((process = xbt_swag_extract(processes)))
270 smx_ctx_raw_resume(process->context);
273 static void smx_ctx_raw_resume_parallel(smx_context_t context)
275 xbt_os_thread_set_extra_data(context);
277 &((smx_ctx_raw_t) context)->old_stack_top,
278 ((smx_ctx_raw_t) context)->stack_top);
279 xbt_os_thread_set_extra_data(NULL);
282 static void smx_ctx_raw_runall_parallel(xbt_swag_t processes)
284 smx_process_t process;
285 while((process = xbt_swag_extract(processes))){
286 xbt_tpool_queue_job(tpool, (void_f_pvoid_t)smx_ctx_raw_resume_parallel, process->context);
288 xbt_tpool_wait_all(tpool);
291 static smx_context_t smx_ctx_raw_self_parallel(void)
293 smx_context_t self_context = (smx_context_t) xbt_os_thread_get_extra_data();
294 return self_context ? self_context : (smx_context_t) maestro_raw_context;
297 void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
299 VERB0("Using raw contexts. Because the glibc is just not good enough for us.");
300 smx_ctx_base_factory_init(factory);
302 (*factory)->finalize = smx_ctx_raw_factory_finalize;
303 (*factory)->create_context = smx_ctx_raw_create_context;
304 /* Do not overload that method (*factory)->finalize */
305 (*factory)->free = smx_ctx_raw_free;
306 (*factory)->stop = smx_ctx_raw_stop;
307 (*factory)->suspend = smx_ctx_raw_suspend;
308 (*factory)->name = "smx_raw_context_factory";
310 if(_surf_parallel_contexts){
311 #ifdef CONTEXT_THREADS /* To use parallel ucontexts a thread pool is needed */
312 tpool = xbt_tpool_new(2, 10);
313 (*factory)->runall = smx_ctx_raw_runall_parallel;
314 (*factory)->self = smx_ctx_raw_self_parallel;
316 THROW0(arg_error, 0, "No thread support for parallel context execution");
319 (*factory)->runall = smx_ctx_raw_runall;