3 /* Copyright (c) 2006-2022. 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 "xbt/config.hpp"
14 #include "xbt/coverage.h"
15 #include "xbt/dynar.h"
17 #include "xbt/log.hpp"
19 #include "xbt/module.h" /* this module */
20 #include "xbt/sysdep.h"
21 #include "xbt/xbt_modinter.h" /* prototype of other module's init/exit in XBT */
26 # include <csignal> /* To silence MSVC on abort() */
34 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(module, xbt, "module handling");
36 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) */
40 std::string binary_name; /* Name of the system process containing us (mandatory to retrieve neat backtraces) */
41 std::vector<std::string> cmdline; /* all we got in argv */
43 } // namespace simgrid
45 int xbt_initialized = 0;
46 simgrid::config::Flag<bool> cfg_dbg_clean_atexit{
48 "Whether to cleanup SimGrid at exit. Disable it if your code segfaults after its end.",
54 /* Declare xbt_preinit and xbt_postexit as constructor/destructor of the library.
55 * This is crude and rather compiler-specific, unfortunately.
57 static void xbt_preinit() XBT_ATTRIB_CONSTRUCTOR(200);
58 static void xbt_postexit();
64 /* Should not be necessary but for some reason, DllMain is called twice at attachment and at detachment.*/
65 /* see also http://msdn.microsoft.com/en-us/library/ms682583%28VS.85%29.aspx */
66 /* and http://www.microsoft.com/whdc/driver/kernel/DLL_bestprac.mspx */
67 static BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
69 static bool xbt_dll_process_is_attached = false;
70 if (fdwReason == DLL_PROCESS_ATTACH && not xbt_dll_process_is_attached) {
71 xbt_dll_process_is_attached = true;
73 } else if (fdwReason == DLL_PROCESS_DETACH && xbt_dll_process_is_attached) {
74 xbt_dll_process_is_attached = false;
82 static void xbt_preinit()
87 xbt_pagesize = si.dwPageSize;
89 xbt_pagesize = static_cast<int>(sysconf(_SC_PAGESIZE));
91 # error Cannot get page size.
94 xbt_pagebits = static_cast<int>(log2(xbt_pagesize));
96 #ifdef _TWO_DIGIT_EXPONENT
97 /* Even printf behaves differently on Windows... */
98 _set_output_format(_TWO_DIGIT_EXPONENT);
102 atexit(xbt_postexit);
105 static void xbt_postexit()
107 if (not cfg_dbg_clean_atexit)
117 /** @brief Initialize the xbt mechanisms. */
118 void xbt_init(int *argc, char **argv)
121 if (xbt_initialized > 1) {
122 XBT_DEBUG("XBT has been initialized %d times.", xbt_initialized);
126 simgrid::xbt::install_exception_handler();
129 simgrid::xbt::binary_name = argv[0];
130 for (int i = 0; i < *argc; i++)
131 simgrid::xbt::cmdline.emplace_back(argv[i]);
133 xbt_log_init(argc, argv);
136 /* these two functions belong to xbt/sysdep.h, which have no corresponding .c file */
137 /** @brief like xbt_free, but you can be sure that it is a function */
138 void xbt_free_f(void* p) noexcept(noexcept(::free))
143 /** @brief should be given a pointer to pointer, and frees the second one */
144 void xbt_free_ref(void* d) noexcept(noexcept(::free))
146 xbt_free(*(void**)d);
149 /** @brief Kill the program in silence */
152 /* Call __gcov_flush on abort when compiling with coverage options. */
153 coverage_checkpoint();
155 /* We said *in silence*. We don't want to see the error message printed by Microsoft's implementation of abort(). */
157 signal(SIGABRT, SIG_DFL);