3 /* Copyright (c) 2006-2019. The SimGrid Team. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #define XBT_LOG_LOCALLY_DEFINE_XBT_CHANNEL /* MSVC don't want it to be declared extern in headers and local here */
10 #include "simgrid/config.h"
11 #include "simgrid/sg_config.hpp"
12 #include "src/internal_config.h"
13 #include "src/xbt_modinter.h" /* prototype of other module's init/exit in XBT */
14 #include "xbt/config.hpp"
15 #include "xbt/coverage.h"
16 #include "xbt/dynar.h"
18 #include "xbt/log.hpp"
20 #include "xbt/module.h" /* this module */
21 #include "xbt/sysdep.h"
26 # include <csignal> /* To silence MSVC on abort() */
32 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(module, xbt, "module handling");
34 XBT_LOG_NEW_CATEGORY(smpi, "All SMPI categories"); /* lives here even if that's a bit odd to solve linking issues: this is used in xbt_log_file_appender to detect whether SMPI is used (and thus whether we should unbench the writing to disk) */
36 char *xbt_binary_name = NULL; /* Name of the system process containing us (mandatory to retrieve neat backtraces) */
37 xbt_dynar_t xbt_cmdline = NULL; /* all we got in argv */
39 int xbt_initialized = 0;
40 simgrid::config::Flag<bool> cfg_dbg_clean_atexit{
43 "Whether to cleanup SimGrid at exit. Disable it if your code segfaults after its end.",
49 /* Declare xbt_preinit and xbt_postexit as constructor/destructor of the library.
50 * This is crude and rather compiler-specific, unfortunately.
52 static void xbt_preinit() XBT_ATTRIB_CONSTRUCTOR(200);
53 static void xbt_postexit();
59 /* Should not be necessary but for some reason, DllMain is called twice at attachment and at detachment.*/
60 static int xbt_dll_process_is_attached = 0;
62 /* see also http://msdn.microsoft.com/en-us/library/ms682583%28VS.85%29.aspx */
63 /* and http://www.microsoft.com/whdc/driver/kernel/DLL_bestprac.mspx */
64 static BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
66 if (fdwReason == DLL_PROCESS_ATTACH
67 && xbt_dll_process_is_attached == 0) {
68 xbt_dll_process_is_attached = 1;
70 } else if (fdwReason == DLL_PROCESS_DETACH
71 && xbt_dll_process_is_attached == 1) {
72 xbt_dll_process_is_attached = 0;
80 static void xbt_preinit()
85 xbt_pagesize = si.dwPageSize;
87 xbt_pagesize = sysconf(_SC_PAGESIZE);
89 # error Cannot get page size.
92 xbt_pagebits = log2(xbt_pagesize);
94 #ifdef _TWO_DIGIT_EXPONENT
95 /* Even printf behaves differently on Windows... */
96 _set_output_format(_TWO_DIGIT_EXPONENT);
100 atexit(xbt_postexit);
103 static void xbt_postexit()
105 if (not cfg_dbg_clean_atexit)
109 xbt_dynar_free(&xbt_cmdline);
116 /** @brief Initialize the xbt mechanisms. */
117 void xbt_init(int *argc, char **argv)
119 simgrid::xbt::install_exception_handler();
122 if (xbt_initialized > 1) {
123 XBT_DEBUG("XBT has been initialized %d times.", xbt_initialized);
127 xbt_binary_name = argv[0];
128 xbt_cmdline = xbt_dynar_new(sizeof(char*), NULL);
129 for (int i = 0; i < *argc; i++)
130 xbt_dynar_push(xbt_cmdline,&(argv[i]));
132 xbt_log_init(argc, argv);
135 /* these two functions belong to xbt/sysdep.h, which have no corresponding .c file */
136 /** @brief like xbt_free, but you can be sure that it is a function */
137 void xbt_free_f(void* p) noexcept(noexcept(::free))
142 /** @brief should be given a pointer to pointer, and frees the second one */
143 void xbt_free_ref(void* d) noexcept(noexcept(::free))
145 xbt_free(*(void**)d);
148 /** @brief Kill the program in silence */
151 /* Call __gcov_flush on abort when compiling with coverage options. */
152 coverage_checkpoint();
154 /* We said *in silence*. We don't want to see the error message printed by Microsoft's implementation of abort(). */
156 signal(SIGABRT, SIG_DFL);