X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/49ee23364e64238e221aa5a06e142b24d28a7b1c..a3a9277b2d833bad63f6ca22dcf9cc563fbe0f68:/src/xbt/xbt_context_sysv.c

diff --git a/src/xbt/xbt_context_sysv.c b/src/xbt/xbt_context_sysv.c
index bf0558853e..821b501f21 100644
--- a/src/xbt/xbt_context_sysv.c
+++ b/src/xbt/xbt_context_sysv.c
@@ -1,3 +1,11 @@
+/* $Id$ */
+
+/* context_sysv - implementation of context switching with ucontextes from Sys V */
+
+/* Copyright (c) 2004-2008 the SimGrid team. All right reserved */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
 
 #include "xbt/ex_interface.h"
 #include "xbt/xbt_context_private.h"
@@ -6,12 +14,20 @@
 #include "portable.h"
 #include <ucontext.h>           /* context relative declarations                                */
 #define STACK_SIZE 128*1024     /* lower this if you want to reduce the memory consumption      */
+#ifdef HAVE_VALGRIND_VALGRIND_H
+#  include <valgrind/valgrind.h>
+#endif /* HAVE_VALGRIND_VALGRIND_H */
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(xbt_context);
 
 typedef struct s_xbt_ctx_sysv {
   XBT_CTX_BASE_T;
   ucontext_t uc;                /* the thread that execute the code                             */
   char stack[STACK_SIZE];       /* the thread stack size                                        */
-  struct s_xbt_ctx_sysv *prev;  /* the previous thread                                              */
+  struct s_xbt_ctx_sysv *prev;  /* the previous thread                                          */
+#ifdef HAVE_VALGRIND_VALGRIND_H
+  unsigned int valgrind_stack_id;       /* the valgrind stack id.       */
+#endif                          /* HAVE_VALGRIND_VALGRIND_H */
 } s_xbt_ctx_sysv_t, *xbt_ctx_sysv_t;
 
 
@@ -93,6 +109,8 @@ xbt_ctx_sysv_factory_create_maestro_context(xbt_context_t * maestro)
 
   xbt_ctx_sysv_t context = xbt_new0(s_xbt_ctx_sysv_t, 1);
 
+  context->name = (char *) "maestro";
+
   context->exception = xbt_new(ex_ctx_t, 1);
   XBT_CTX_INITIALIZE(context->exception);
 
@@ -118,6 +136,7 @@ xbt_ctx_sysv_factory_create_context(const char *name, xbt_main_func_t code,
                                     void_f_pvoid_t cleanup_func,
                                     void *cleanup_arg, int argc, char **argv)
 {
+  VERB1("Create context %s", name);
   xbt_ctx_sysv_t context = xbt_new0(s_xbt_ctx_sysv_t, 1);
 
   context->code = code;
@@ -130,6 +149,12 @@ xbt_ctx_sysv_factory_create_context(const char *name, xbt_main_func_t code,
     pth_skaddr_makecontext(context->stack, STACK_SIZE);
   context->uc.uc_stack.ss_size =
     pth_sksize_makecontext(context->stack, STACK_SIZE);
+#ifdef HAVE_VALGRIND_VALGRIND_H
+  context->valgrind_stack_id =
+    VALGRIND_STACK_REGISTER(context->uc.uc_stack.ss_sp,
+                            ((char *) context->uc.uc_stack.ss_sp) +
+                            context->uc.uc_stack.ss_size);
+#endif /* HAVE_VALGRIND_VALGRIND_H */
 
   context->exception = xbt_new(ex_ctx_t, 1);
   XBT_CTX_INITIALIZE(context->exception);
@@ -170,6 +195,10 @@ static void xbt_ctx_sysv_free(xbt_context_t context)
     if (context->exception)
       free(context->exception);
 
+#ifdef HAVE_VALGRIND_VALGRIND_H
+    VALGRIND_STACK_DEREGISTER(((xbt_ctx_sysv_t) context)->valgrind_stack_id);
+#endif /* HAVE_VALGRIND_VALGRIND_H */
+
     /* finally destroy the context */
     free(context);
   }
@@ -177,6 +206,8 @@ static void xbt_ctx_sysv_free(xbt_context_t context)
 
 static void xbt_ctx_sysv_kill(xbt_context_t context)
 {
+  DEBUG2("Kill context '%s' (from '%s')", context->name,
+         current_context->name);
   context->iwannadie = 1;
   xbt_ctx_sysv_swap(context);
 }
@@ -192,6 +223,7 @@ static void xbt_ctx_sysv_kill(xbt_context_t context)
  */
 static void xbt_ctx_sysv_schedule(xbt_context_t context)
 {
+  DEBUG1("Schedule context '%s'", context->name);
   xbt_assert0((current_context == maestro_context),
               "You are not supposed to run this function here!");
   xbt_ctx_sysv_swap(context);
@@ -207,6 +239,7 @@ static void xbt_ctx_sysv_schedule(xbt_context_t context)
  */
 static void xbt_ctx_sysv_yield(void)
 {
+  DEBUG1("Yielding context '%s'", current_context->name);
   xbt_assert0((current_context != maestro_context),
               "You are not supposed to run this function here!");
   xbt_ctx_sysv_swap(current_context);
@@ -214,11 +247,13 @@ static void xbt_ctx_sysv_yield(void)
 
 static void xbt_ctx_sysv_start(xbt_context_t context)
 {
+  DEBUG1("Start context '%s'", context->name);
   makecontext(&(((xbt_ctx_sysv_t) context)->uc), xbt_ctx_sysv_wrapper, 0);
 }
 
 static void xbt_ctx_sysv_stop(int exit_code)
 {
+  /* please no debug here: our procdata was already free'd */
   if (current_context->cleanup_func)
     ((*current_context->cleanup_func)) (current_context->cleanup_arg);
 
@@ -230,6 +265,7 @@ static void xbt_ctx_sysv_stop(int exit_code)
 
 static void xbt_ctx_sysv_swap(xbt_context_t context)
 {
+  DEBUG2("Swap context: '%s' -> '%s'", current_context->name, context->name);
   xbt_assert0(current_context, "You have to call context_init() first.");
   xbt_assert0(context, "Invalid argument");
 
@@ -255,6 +291,7 @@ static void xbt_ctx_sysv_suspend(xbt_context_t context)
 {
   int rv;
 
+  DEBUG1("Suspend context: '%s'", current_context->name);
   xbt_ctx_sysv_t prev_context = ((xbt_ctx_sysv_t) context)->prev;
 
   current_context = (xbt_context_t) (((xbt_ctx_sysv_t) context)->prev);
@@ -270,6 +307,8 @@ static void xbt_ctx_sysv_resume(xbt_context_t context)
 {
   int rv;
 
+  DEBUG2("Resume context: '%s' (from '%s')", context->name,
+         current_context->name);
   ((xbt_ctx_sysv_t) context)->prev = (xbt_ctx_sysv_t) current_context;
 
   current_context = context;