Date: Tue, 11 Mar 2008 17:45:05 -0300 From: sergio lenzi <lenzi@k1.com.br> To: freebsd-questions@freebsd.org Subject: EVOLUTION SLOW START , a workaround Message-ID: <1205268305.52059.16.camel@localhost> In-Reply-To: <20080310231502.V7454@wojtek.tensor.gdynia.pl> References: <94136a2c0803101454l6ca76c99ma1fa1083d7ea2137@mail.gmail.com> <20080310231502.V7454@wojtek.tensor.gdynia.pl>
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Hello all This week I have time to trace the problem with evolution that lasts too much time to start. The problem is that glib on function g_module_load, searchs for a symbol g_module_check_init, g_module_unload... by default. It occurs that the evolution code, that will be loaded, does not have those functions available... so th glib (and dlsym) tries to find the symbol in every load module in memory... and doing so consumes all cpu for several seconds, for each load module.... ! coded a solution for gmodule that tests for those special symbos, and if found, uses dlsymb(RTLD_NEXT,....) instead of dlsym(handler....) so it will search a much less modules, and evolution will start in 3 seconds... (20 times less...) Of course the correct strategy is to correct code evolution module (libevolution-mail.so). will do next time.... modified file: /usr/ports/devel/glib20/files/patch-gmodule::gmodule-dl.c please note this is only a temporary fix... the correct solution is to fix the evolution module.... ============================================= --- gmodule/gmodule-dl.c.orig 2008-02-07 03:24:53.000000000 -0200 +++ gmodule/gmodule-dl.c 2008-03-11 18:53:44.000000000 -0300 @@ -73,6 +73,14 @@ #endif /* RTLD_GLOBAL */ +static char *special_names[]={ + "g_module_check_init", + "g_module_unload", + "e_plugin_lib_enable", + NULL +}; + + /* --- functions --- */ static gchar* fetch_dlerror (gboolean replace_null) @@ -106,6 +114,7 @@ static gpointer _g_module_self (void) { +#ifndef __FreeBSD__ gpointer handle; /* to query symbols from the program itself, special link options @@ -117,6 +126,9 @@ g_module_set_error (fetch_dlerror (TRUE)); return handle; +#else + return RTLD_DEFAULT; +#endif } static void @@ -141,9 +153,19 @@ { gpointer p; gchar *msg; + char **pn; fetch_dlerror (FALSE); - p = dlsym (handle, symbol_name); + + for (pn=special_names;*pn;pn++) { + if (!strcmp(*pn,symbol_name)) { + p=dlsym(RTLD_NEXT,symbol_name); + break; + } + } + + if (! *pn) + p = dlsym (handle, symbol_name); msg = fetch_dlerror (FALSE); if (msg) g_module_set_error (msg);
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