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 "src/sthread/sthread.h" // sthread_inside_simgrid
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"
22 #include "xbt/xbt_modinter.h" /* prototype of other module's init/exit in XBT */
27 # include <csignal> /* To silence MSVC on abort() */
35 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(module, xbt, "module handling");
37 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) */
39 namespace simgrid::xbt {
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 */
42 } // namespace simgrid::xbt
44 int sthread_inside_simgrid = 0; // whether sthread should leave pthread operations or intercept them.
46 int xbt_initialized = 0;
47 simgrid::config::Flag<bool> cfg_dbg_clean_atexit{
49 "Whether to cleanup SimGrid at exit. Disable it if your code segfaults after its end.",
55 /* Declare xbt_preinit and xbt_postexit as constructor/destructor of the library.
56 * This is crude and rather compiler-specific, unfortunately.
58 static void xbt_preinit() XBT_ATTRIB_CONSTRUCTOR(200);
59 static void xbt_postexit();
65 /* Should not be necessary but for some reason, DllMain is called twice at attachment and at detachment.*/
66 /* see also http://msdn.microsoft.com/en-us/library/ms682583%28VS.85%29.aspx */
67 /* and http://www.microsoft.com/whdc/driver/kernel/DLL_bestprac.mspx */
68 static BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
70 static bool xbt_dll_process_is_attached = false;
71 if (fdwReason == DLL_PROCESS_ATTACH && not xbt_dll_process_is_attached) {
72 xbt_dll_process_is_attached = true;
74 } else if (fdwReason == DLL_PROCESS_DETACH && xbt_dll_process_is_attached) {
75 xbt_dll_process_is_attached = false;
83 static void xbt_preinit()
85 sthread_inside_simgrid = 1;
89 xbt_pagesize = si.dwPageSize;
91 xbt_pagesize = static_cast<int>(sysconf(_SC_PAGESIZE));
93 # error Cannot get page size.
96 xbt_pagebits = static_cast<int>(log2(xbt_pagesize));
98 #ifdef _TWO_DIGIT_EXPONENT
99 /* Even printf behaves differently on Windows... */
100 _set_output_format(_TWO_DIGIT_EXPONENT);
104 atexit(xbt_postexit);
105 sthread_inside_simgrid = 0;
108 static void xbt_postexit()
110 if (not cfg_dbg_clean_atexit)
120 /** @brief Initialize the xbt mechanisms. */
121 void xbt_init(int *argc, char **argv)
124 if (xbt_initialized > 1) {
125 XBT_DEBUG("XBT has been initialized %d times.", xbt_initialized);
129 simgrid::xbt::install_exception_handler();
132 simgrid::xbt::binary_name = argv[0];
133 for (int i = 0; i < *argc; i++)
134 simgrid::xbt::cmdline.emplace_back(argv[i]);
136 xbt_log_init(argc, argv);
139 /* these two functions belong to xbt/sysdep.h, which have no corresponding .c file */
140 /** @brief like xbt_free, but you can be sure that it is a function */
141 void xbt_free_f(void* p) noexcept(noexcept(::free))
146 /** @brief should be given a pointer to pointer, and frees the second one */
147 void xbt_free_ref(void* d) noexcept(noexcept(::free))
149 xbt_free(*(void**)d);
152 /** @brief Kill the program in silence */
155 /* Call __gcov_flush on abort when compiling with coverage options. */
156 coverage_checkpoint();
158 /* We said *in silence*. We don't want to see the error message printed by Microsoft's implementation of abort(). */
160 signal(SIGABRT, SIG_DFL);