1 /* dcrt0.cc -- essentially the main() for the Cygwin dll
3 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
6 This file is part of Cygwin.
8 This software is a copyrighted work licensed under the terms of the
9 Cygwin license. Please consult the file "CYGWIN_LICENSE" for
17 #include "exceptions.h"
26 #include "perprocess.h"
32 #include "child_info_magic.h"
34 #include "shared_info.h"
35 #include "cygwin_version.h"
41 #define MAX_AT_FILE_LEVEL 10
43 #define PREMAIN_LEN (sizeof (user_data->premain) / sizeof (user_data->premain[0]))
45 extern "C" void cygwin_exit (int) __attribute__ ((noreturn));
47 HANDLE NO_COPY hMainProc = (HANDLE) -1;
48 HANDLE NO_COPY hMainThread;
49 HANDLE NO_COPY hProcToken;
50 HANDLE NO_COPY hProcImpToken;
52 muto NO_COPY lock_process::locker;
55 bool strip_title_path;
56 bool allow_glob = true;
57 bool NO_COPY in_forkee;
58 codepage_type current_codepage = ansi_cp;
61 int _declspec(dllexport) __argc;
62 char _declspec(dllexport) **__argv;
64 vfork_save NO_COPY *main_vfork;
67 static int NO_COPY envc;
70 extern "C" void __sinit (_reent *);
72 _cygtls NO_COPY *_main_tls;
74 bool NO_COPY cygwin_finished_initializing;
76 /* Used in SIGTOMASK for generating a bit for insertion into a sigset_t.
77 This is subtracted from the signal number prior to shifting the bit.
78 In older versions of cygwin, the signal was used as-is to shift the
79 bit for masking. So, we'll temporarily detect this and set it to zero
80 for programs that are linked using older cygwins. This is just a stopgap
81 measure to allow an orderly transfer to the new, correct sigmask method. */
82 unsigned NO_COPY int signal_shift_subtract = 1;
84 ResourceLocks _reslock NO_COPY;
85 MTinterface _mtinterf;
87 bool NO_COPY _cygwin_testing;
89 char NO_COPY almost_null[1];
93 /* This is an exported copy of environ which can be used by DLLs
94 which use cygwin.dll. */
95 char **__cygwin_environ;
96 char ***main_environ = &__cygwin_environ;
97 /* __progname used in getopt error message */
99 struct per_process __cygwin_user_data =
100 {/* initial_sp */ 0, /* magic_biscuit */ 0,
101 /* dll_major */ CYGWIN_VERSION_DLL_MAJOR,
102 /* dll_major */ CYGWIN_VERSION_DLL_MINOR,
103 /* impure_ptr_ptr */ NULL, /* envptr */ NULL,
104 /* malloc */ malloc, /* free */ free,
105 /* realloc */ realloc,
106 /* fmode_ptr */ NULL, /* main */ NULL, /* ctors */ NULL,
107 /* dtors */ NULL, /* data_start */ NULL, /* data_end */ NULL,
108 /* bss_start */ NULL, /* bss_end */ NULL,
110 /* premain */ {NULL, NULL, NULL, NULL},
112 /* unused */ {0, 0, 0, 0, 0, 0, 0},
113 /* UNUSED forkee */ 0,
115 /* api_major */ CYGWIN_VERSION_API_MAJOR,
116 /* api_minor */ CYGWIN_VERSION_API_MINOR,
117 /* unused2 */ {0, 0, 0, 0, 0},
118 /* resourcelocks */ &_reslock, /* threadinterface */ &_mtinterf,
119 /* impure_ptr */ _GLOBAL_REENT,
121 bool ignore_case_with_glob;
122 int __declspec (dllexport) _check_for_executable = true;
126 int NO_COPY __api_fatal_exit_val = 1;
130 char title_buf[TITLESIZE + 1];
135 void (**pfunc) () = user_data->dtors;
138 user_data->dtors = NULL;
144 static void __stdcall
145 do_global_ctors (void (**in_pfunc)(), int force)
147 if (!force && in_forkee)
148 return; // inherit constructed stuff from parent pid
150 /* Run ctors backwards, so skip the first entry and find how many
151 there are, then run them. */
153 void (**pfunc) () = in_pfunc;
157 while (--pfunc > in_pfunc)
162 * Replaces @file in the command line with the contents of the file.
163 * There may be multiple @file's in a single command line
164 * A \@file is replaced with @file so that echo \@foo would print
165 * @foo and not the contents of foo.
167 static bool __stdcall
168 insert_file (char *name, char *&cmd)
173 f = CreateFile (name + 1,
174 GENERIC_READ, /* open for reading */
175 FILE_SHARE_READ, /* share for reading */
176 &sec_none_nih, /* no security */
177 OPEN_EXISTING, /* existing file only */
178 FILE_ATTRIBUTE_NORMAL, /* normal file */
179 NULL); /* no attr. template */
181 if (f == INVALID_HANDLE_VALUE)
183 debug_printf ("couldn't open file '%s', %E", name);
187 /* This only supports files up to about 4 billion bytes in
188 size. I am making the bold assumption that this is big
189 enough for this feature */
190 size = GetFileSize (f, NULL);
191 if (size == 0xFFFFFFFF)
193 debug_printf ("couldn't get file size for '%s', %E", name);
197 int new_size = strlen (cmd) + size + 2;
198 char *tmp = (char *) malloc (new_size);
201 debug_printf ("malloc failed, %E");
205 /* realloc passed as it should */
208 rf_result = ReadFile (f, tmp, size, &rf_read, NULL);
210 if (!rf_result || (rf_read != size))
212 debug_printf ("ReadFile failed, %E");
217 strcpy (tmp + size, cmd);
226 return ch == '"' || ch == '\'';
229 /* Step over a run of characters delimited by quotes */
230 static /*__inline*/ char *
231 quoted (char *cmd, int winshell)
239 strcpy (cmd, cmd + 1);
240 if (*(p = strechr (cmd, quote)))
245 const char *s = quote == '\'' ? "'" : "\\\"";
246 /* This must have been run from a Windows shell, so preserve
247 quotes for globify to play with later. */
248 while (*cmd && *++cmd)
249 if ((p = strpbrk (cmd, s)) == NULL)
251 cmd = strchr (cmd, '\0'); // no closing quote
256 else if (quote == '"' && p[1] == '"')
259 cmd = ++p; // a quoted quote
263 cmd = p + 1; // point to after end
269 /* Perform a glob on word if it contains wildcard characters.
270 Also quote every character between quotes to force glob to
271 treat the characters literally. */
273 globify (char *word, char **&argv, int &argc, int &argvlen)
275 if (*word != '~' && strpbrk (word, "?*[\"\'(){}") == NULL)
280 int dos_spec = isdrive (word);
281 if (!dos_spec && isquote (*word) && word[1] && word[2])
282 dos_spec = isdrive (word + 1);
284 /* We'll need more space if there are quoting characters in
285 word. If that is the case, doubling the size of the
286 string should provide more than enough space. */
287 if (strpbrk (word, "'\""))
289 char pattern[strlen (word) + ((dos_spec + 1) * n) + 1];
291 /* Fill pattern with characters from word, quoting any
292 characters found within quotes. */
293 for (p = pattern, s = word; *s != '\000'; s++, p++)
296 if (dos_spec && *s == '\\')
303 while (*++s && *s != quote)
305 if (dos_spec || *s != '\\')
307 else if (s[1] == quote || s[1] == '\\')
323 /* Attempt to match the argument. Return just word (minus quoting) if no match. */
324 if (glob (pattern, GLOB_TILDE | GLOB_NOCHECK | GLOB_BRACE | GLOB_QUOTE, NULL, &gl) || !gl.gl_pathc)
327 /* Allocate enough space in argv for the matched filenames. */
329 if ((argc += gl.gl_pathc) > argvlen)
332 argv = (char **) realloc (argv, (1 + argvlen) * sizeof (argv[0]));
335 /* Copy the matched filenames to argv. */
336 char **gv = gl.gl_pathv;
337 char **av = argv + n;
340 debug_printf ("argv[%d] = '%s'", n++, *gv);
344 /* Clean up after glob. */
349 /* Build argv, argc from string passed from Windows. */
351 static void __stdcall
352 build_argv (char *cmd, char **&argv, int &argc, int winshell)
355 int nesting = 0; // monitor "nesting" from insert_file
361 /* Scan command line until there is nothing left. */
371 /* Found the beginning of an argument. */
373 char *sawquote = NULL;
376 if (*cmd != '"' && (!winshell || *cmd != '\''))
377 cmd++; // Skip over this character
379 /* Skip over characters until the closing quote */
382 cmd = quoted (cmd, winshell && argc > 0);
384 if (issep (*cmd)) // End of argument if space
388 *cmd++ = '\0'; // Terminate `word'
390 /* Possibly look for @file construction assuming that this isn't
391 the very first argument and the @ wasn't quoted */
392 if (argc && sawquote != word && *word == '@')
394 if (++nesting > MAX_AT_FILE_LEVEL)
395 api_fatal ("Too many levels of nesting for %s", word);
396 if (insert_file (word, cmd))
397 continue; // There's new stuff in cmd now
400 /* See if we need to allocate more space for argv */
404 argv = (char **) realloc (argv, (1 + argvlen) * sizeof (argv[0]));
407 /* Add word to argv file after (optional) wildcard expansion. */
408 if (!winshell || !argc || !globify (word, argv, argc, argvlen))
410 debug_printf ("argv[%d] = '%s'", argc, word);
417 debug_printf ("argc %d", argc);
420 /* sanity and sync check */
422 check_sanity_and_sync (per_process *p)
424 /* Sanity check to make sure developers didn't change the per_process */
425 /* struct without updating SIZEOF_PER_PROCESS [it makes them think twice */
426 /* about changing it]. */
427 if (sizeof (per_process) != SIZEOF_PER_PROCESS)
428 api_fatal ("per_process sanity check failed");
430 /* Make sure that the app and the dll are in sync. */
432 /* Complain if older than last incompatible change */
433 if (p->dll_major < CYGWIN_VERSION_DLL_EPOCH)
434 api_fatal ("cygwin DLL and APP are out of sync -- DLL version mismatch %d < %d",
435 p->dll_major, CYGWIN_VERSION_DLL_EPOCH);
437 /* magic_biscuit != 0 if using the old style version numbering scheme. */
438 if (p->magic_biscuit != SIZEOF_PER_PROCESS)
439 api_fatal ("Incompatible cygwin .dll -- incompatible per_process info %d != %d",
440 p->magic_biscuit, SIZEOF_PER_PROCESS);
442 /* Complain if incompatible API changes made */
443 if (p->api_major > cygwin_version.api_major)
444 api_fatal ("cygwin DLL and APP are out of sync -- API version mismatch %d > %d",
445 p->api_major, cygwin_version.api_major);
447 if (CYGWIN_VERSION_DLL_MAKE_COMBINED (p->dll_major, p->dll_minor) <=
448 CYGWIN_VERSION_DLL_BAD_SIGNAL_MASK)
449 signal_shift_subtract = 0;
452 child_info NO_COPY *child_proc_info = NULL;
454 #define CYGWIN_GUARD ((wincap.has_page_guard ()) ? \
455 PAGE_EXECUTE_READWRITE|PAGE_GUARD : PAGE_NOACCESS)
458 child_info_fork::alloc_stack_hard_way (volatile char *b)
460 void *new_stack_pointer;
461 MEMORY_BASIC_INFORMATION m;
466 if (!VirtualQuery ((LPCVOID) &b, &m, sizeof m))
467 api_fatal ("fork: couldn't get stack info, %E");
469 LPBYTE curbot = (LPBYTE) m.BaseAddress + m.RegionSize;
471 if (stacktop > (LPBYTE) m.AllocationBase && stacktop < curbot)
474 newlen = (LPBYTE) stackbottom - (LPBYTE) curbot;
480 newlen = (DWORD) stackbottom - (DWORD) stacktop;
483 if (!VirtualAlloc (newbase, newlen, MEM_RESERVE, PAGE_NOACCESS))
484 api_fatal ("fork: can't reserve memory for stack %p - %p, %E",
485 stacktop, stackbottom);
487 new_stack_pointer = (void *) ((LPBYTE) stackbottom - stacksize);
488 if (!VirtualAlloc (new_stack_pointer, stacksize, MEM_COMMIT,
489 PAGE_EXECUTE_READWRITE))
490 api_fatal ("fork: can't commit memory for stack %p(%d), %E",
491 new_stack_pointer, stacksize);
492 if (!VirtualQuery ((LPCVOID) new_stack_pointer, &m, sizeof m))
493 api_fatal ("fork: couldn't get new stack info, %E");
496 m.BaseAddress = (LPVOID) ((DWORD) m.BaseAddress - 1);
497 if (!VirtualAlloc ((LPVOID) m.BaseAddress, 1, MEM_COMMIT,
499 api_fatal ("fork: couldn't allocate new stack guard page %p, %E",
502 if (!VirtualQuery ((LPCVOID) m.BaseAddress, &m, sizeof m))
503 api_fatal ("fork: couldn't get new stack info, %E");
504 stacktop = m.BaseAddress;
508 void *getstack (void *) __attribute__ ((noinline));
510 getstack (volatile char * volatile p)
517 /* extend the stack prior to fork longjmp */
520 child_info_fork::alloc_stack ()
522 volatile char * volatile esp;
523 __asm__ volatile ("movl %%esp,%0": "=r" (esp));
524 if (_tlsbase != stackbottom)
525 alloc_stack_hard_way (esp);
528 char *st = (char *) stacktop - 4096;
529 while (_tlstop >= st)
530 esp = getstack (esp);
538 static int NO_COPY sent_break;
541 debug_printf ("break here");
547 char buf[CYG_MAX_PATH];
548 if (GetEnvironmentVariable ("CYGWIN_TESTING", buf, sizeof (buf) - 1))
554 if (GetEnvironmentVariable ("CYGWIN_SLEEP", buf, sizeof (buf) - 1))
556 DWORD ms = atoi (buf);
558 len = GetModuleFileName (NULL, buf, CYG_MAX_PATH);
559 console_printf ("Sleeping %d, pid %u %s\n", ms, GetCurrentProcessId (), buf);
561 if (!strace.active () && !dynamically_loaded)
564 if (GetEnvironmentVariable ("CYGWIN_DEBUG", buf, sizeof (buf) - 1))
566 char buf1[CYG_MAX_PATH];
567 len = GetModuleFileName (NULL, buf1, CYG_MAX_PATH);
570 char *p = strpbrk (buf, ":=");
572 p = (char *) "gdb.exe -nw";
575 if (strstr (buf1, buf))
577 error_start_init (p);
579 console_printf ("*** Sending Break. gdb may issue spurious SIGTRAP message.\n");
588 get_cygwin_startup_info ()
592 GetStartupInfo (&si);
593 child_info *res = (child_info *) si.lpReserved2;
595 if (si.cbReserved2 < EXEC_MAGIC_SIZE || !res
596 || res->intro != PROC_MAGIC_GENERIC || res->magic != CHILD_INFO_MAGIC)
600 if ((res->intro & OPROC_MAGIC_MASK) == OPROC_MAGIC_GENERIC)
601 multiple_cygwin_problem ("proc intro", res->intro, 0);
602 else if (res->cygheap != (void *) &_cygheap_start)
603 multiple_cygwin_problem ("cygheap base", (DWORD) res->cygheap,
604 (DWORD) &_cygheap_start);
606 unsigned should_be_cb = 0;
611 should_be_cb = sizeof (child_info_fork);
616 should_be_cb = sizeof (child_info_spawn);
617 if (should_be_cb != res->cb)
618 multiple_cygwin_problem ("proc size", res->cb, should_be_cb);
619 else if (sizeof (fhandler_union) != res->fhandler_union_cb)
620 multiple_cygwin_problem ("fhandler size", res->fhandler_union_cb, sizeof (fhandler_union));
621 if (res->isstraced ())
624 for (unsigned i = 0; !being_debugged () && i < 10000; i++)
625 low_priority_sleep (0);
630 system_printf ("unknown exec type %d", res->type);
631 /* intentionally fall through */
641 #define dll_data_start &_data_start__
642 #define dll_data_end &_data_end__
643 #define dll_bss_start &_bss_start__
644 #define dll_bss_end &_bss_end__
647 child_info_fork::handle_fork ()
649 cygheap_fixup_in_child (false);
652 myself->uid = cygheap->user.real_uid;
653 myself->gid = cygheap->user.real_gid;
655 child_copy (parent, false,
656 "dll data", dll_data_start, dll_data_end,
657 "dll bss", dll_bss_start, dll_bss_end,
658 "user heap", cygheap->user_heap.base, cygheap->user_heap.ptr,
660 /* step 2 now that the dll has its heap filled in, we can fill in the
661 user's data and bss since user_data is now filled out. */
662 child_copy (parent, false,
663 "data", user_data->data_start, user_data->data_end,
664 "bss", user_data->bss_start, user_data->bss_end,
667 if (fixup_mmaps_after_fork (parent))
668 api_fatal ("recreate_mmaps_after_fork_failed");
672 child_info_spawn::handle_spawn ()
675 cygheap_fixup_in_child (true);
677 if (!moreinfo->myself_pinfo ||
678 !DuplicateHandle (hMainProc, moreinfo->myself_pinfo, hMainProc, &h, 0,
679 FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE))
682 __argc = moreinfo->argc;
683 __argv = moreinfo->argv;
684 envp = moreinfo->envp;
685 envc = moreinfo->envc;
686 if (!dynamically_loaded)
687 cygheap->fdtab.fixup_after_exec ();
689 cygheap->fdtab.move_fd (__stdin, 0);
691 cygheap->fdtab.move_fd (__stdout, 1);
695 /* Need to do this after debug_fixup_after_fork_exec or DEBUGGING handling of
696 handles might get confused. */
697 CloseHandle (child_proc_info->parent);
698 child_proc_info->parent = NULL;
700 signal_fixup_after_exec ();
701 if (moreinfo->old_title)
703 old_title = strcpy (title_buf, moreinfo->old_title);
704 cfree (moreinfo->old_title);
711 init_global_security ();
714 SetErrorMode (SEM_FAILCRITICALERRORS);
716 /* Initialize signal processing here, early, in the hopes that the creation
717 of a thread early in the process will cause more predictability in memory
718 layout for the main thread. */
721 lock_process::init ();
722 _impure_ptr = _GLOBAL_REENT;
723 _impure_ptr->_stdin = &_impure_ptr->__sf[0];
724 _impure_ptr->_stdout = &_impure_ptr->__sf[1];
725 _impure_ptr->_stderr = &_impure_ptr->__sf[2];
726 _impure_ptr->_current_locale = "C";
727 user_data->impure_ptr = _impure_ptr;
728 user_data->impure_ptr_ptr = &_impure_ptr;
731 if (!DuplicateHandle (GetCurrentProcess (), GetCurrentProcess (),
732 GetCurrentProcess (), &hMainProc, 0, FALSE,
733 DUPLICATE_SAME_ACCESS))
734 hMainProc = GetCurrentProcess ();
736 DuplicateHandle (hMainProc, GetCurrentThread (), hMainProc,
737 &hMainThread, 0, false, DUPLICATE_SAME_ACCESS);
738 if (wincap.has_security ())
739 OpenProcessToken (hMainProc, MAXIMUM_ALLOWED, &hProcToken);
742 do_global_ctors (&__CTOR_LIST__, 1);
745 child_proc_info = get_cygwin_startup_info ();
746 if (!child_proc_info)
750 cygwin_user_h = child_proc_info->user_h;
751 switch (child_proc_info->type)
754 fork_info->handle_fork ();
758 spawn_info->handle_spawn ();
763 user_data->resourcelocks->Init ();
764 user_data->threadinterface->Init ();
768 /* Initialize events */
770 tty_list::init_session ();
772 cygheap->cwd.init ();
774 debug_printf ("finished dll_crt0_0 initialization");
777 /* Take over from libc's crt0.o and start the application. Note the
778 various special cases when Cygwin DLL is being runtime loaded (as
779 opposed to being link-time loaded by Cygwin apps) from a non
780 cygwin app via LoadLibrary. */
784 check_sanity_and_sync (user_data);
788 const int n = 2 * 1024 * 1024;
790 small_printf ("cmalloc returns %p\n", cmalloc (HEAP_STR, n));
793 ProtectHandle (hMainProc);
794 ProtectHandle (hMainThread);
796 /* Initialize pthread mainthread when not forked and it is safe to call new,
797 otherwise it is reinitalized in fixup_after_fork */
799 pthread::init_mainthread ();
802 strace.microseconds ();
805 create_signal_arrived (); /* FIXME: move into wait_sig? */
807 /* Initialize debug muto, if DLL is built with --enable-debugging.
808 Need to do this before any helper threads start. */
812 cygheap->fdtab.vfork_child_fixup ();
813 main_vfork = vfork_storage.create ();
816 cygbench ("pre-forkee");
819 /* If we've played with the stack, stacksize != 0. That means that
820 fork() was invoked from other than the main thread. Make sure that
821 frame pointer is referencing the new stack so that the OS knows what
822 to do when it needs to increase the size of the stack.
824 NOTE: Don't do anything that involves the stack until you've completed
826 if (fork_info->stacksize)
828 _tlsbase = (char *) fork_info->stackbottom;
829 _tlstop = (char *) fork_info->stacktop;
831 longjmp (fork_info->jmp, true);
836 extern void fork_init ();
840 pinfo_init (envp, envc);
842 /* Can be set only after environment has been initialized. */
843 if (wincap.has_security ())
844 set_cygwin_privileges (hProcToken);
846 if (!old_title && GetConsoleTitle (title_buf, TITLESIZE))
847 old_title = title_buf;
849 /* Allocate cygheap->fdtab */
852 uinfo_init (); /* initialize user info */
854 wait_for_sigthread ();
855 extern DWORD threadfunc_ix;
857 system_printf ("internal error: couldn't determine location of thread function on stack. Expect signal problems.");
859 /* Connect to tty. */
860 tty::init_session ();
864 char *line = GetCommandLineA ();
865 line = strcpy ((char *) alloca (strlen (line) + 1), line);
867 if (current_codepage == oem_cp)
868 CharToOemA (line, line);
870 /* Scan the command line and build argv. Expand wildcards if not
871 called from another cygwin process. */
872 build_argv (line, __argv, __argc,
873 NOTSTATE (myself, PID_CYGPARENT) && allow_glob);
875 /* Convert argv[0] to posix rules if it's currently blatantly
877 if ((strchr (__argv[0], ':')) || (strchr (__argv[0], '\\')))
879 char *new_argv0 = (char *) malloc (CYG_MAX_PATH);
880 cygwin_conv_to_posix_path (__argv[0], new_argv0);
881 __argv[0] = (char *) realloc (new_argv0, strlen (new_argv0) + 1);
885 __argc_safe = __argc;
886 if (user_data->premain[0])
887 for (unsigned int i = 0; i < PREMAIN_LEN / 2; i++)
888 user_data->premain[i] (__argc, __argv, user_data);
890 /* Set up standard fds in file descriptor table. */
891 cygheap->fdtab.stdio_init ();
893 /* Set up __progname for getopt error call. */
894 if (__argv[0] && (__progname = strrchr (__argv[0], '/')))
897 __progname = __argv[0];
900 char *cp = strchr (__progname, '\0') - 4;
901 if (cp > __progname && strcasematch (cp, ".exe"))
905 /* Set new console title if appropriate. */
907 if (display_title && !dynamically_loaded)
909 char *cp = __progname;
910 if (strip_title_path)
911 for (char *ptr = cp; *ptr && *ptr != ' '; ptr++)
914 set_console_title (cp);
917 cygwin_finished_initializing = true;
918 /* Call init of loaded dlls. */
921 /* Execute any specified "premain" functions */
922 if (user_data->premain[PREMAIN_LEN / 2])
923 for (unsigned int i = PREMAIN_LEN / 2; i < PREMAIN_LEN; i++)
924 user_data->premain[i] (__argc, __argv, user_data);
926 debug_printf ("user_data->main %p", user_data->main);
928 if (dynamically_loaded)
934 /* Disable case-insensitive globbing */
935 ignore_case_with_glob = false;
940 cygbench (__progname);
942 /* Flush signals and ensure that signal thread is up and running. Can't
943 do this for noncygwin case since the signal thread is blocked due to
944 LoadLibrary serialization. */
947 cygwin_exit (user_data->main (__argc, __argv, *user_data->envptr));
950 extern "C" void __stdcall
953 main_environ = user_data->envptr;
955 fork_info->alloc_stack ();
957 __sinit (_impure_ptr);
959 _main_tls = &_my_tls;
960 _main_tls->call ((DWORD (*) (void *, void *)) dll_crt0_1, NULL);
964 dll_crt0 (per_process *uptr)
966 /* Set the local copy of the pointer into the user space. */
967 if (!in_forkee && uptr && uptr != user_data)
969 memcpy (user_data, uptr, per_process_overwrite);
970 *(user_data->impure_ptr_ptr) = _GLOBAL_REENT;
975 /* This must be called by anyone who uses LoadLibrary to load cygwin1.dll.
976 You must have CYGTLS_PADSIZE bytes reserved at the bottom of the stack
977 calling this function, and that storage must not be overwritten until you
978 unload cygwin1.dll, as it is used for _my_tls. It is best to load
979 cygwin1.dll before spawning any additional threads in your process.
981 See winsup/testsuite/cygload for an example of how to use cygwin1.dll
982 from MSVC and non-cygwin MinGW applications. */
989 user_data->magic_biscuit = sizeof (per_process);
991 user_data->envptr = &envp;
992 user_data->fmode_ptr = &_fmode;
1000 do_global_ctors (user_data->ctors, false);
1001 atexit (do_global_dtors);
1004 exit_states NO_COPY exit_state;
1007 do_exit (int status)
1009 syscall_printf ("do_exit (%d), exit_state %d", status, exit_state);
1012 vfork_save *vf = vfork_storage.val ();
1013 if (vf != NULL && vf->pid < 0)
1015 exit_state = ES_NOT_EXITING;
1016 vf->restore_exit (status);
1020 lock_process until_exit (true);
1022 if (exit_state < ES_GLOBAL_DTORS)
1024 exit_state = ES_GLOBAL_DTORS;
1025 dll_global_dtors ();
1028 if (exit_state < ES_EVENTS_TERMINATE)
1030 exit_state = ES_EVENTS_TERMINATE;
1031 events_terminate ();
1034 UINT n = (UINT) status;
1035 if (exit_state < ES_THREADTERM)
1037 exit_state = ES_THREADTERM;
1038 cygthread::terminate ();
1041 if (exit_state < ES_SIGNAL)
1043 exit_state = ES_SIGNAL;
1044 signal (SIGCHLD, SIG_IGN);
1045 signal (SIGHUP, SIG_IGN);
1046 signal (SIGINT, SIG_IGN);
1047 signal (SIGQUIT, SIG_IGN);
1050 if (exit_state < ES_CLOSEALL)
1052 exit_state = ES_CLOSEALL;
1056 myself->stopsig = 0;
1058 if (exit_state < ES_HUP_PGRP)
1060 exit_state = ES_HUP_PGRP;
1061 /* Kill orphaned children on group leader exit */
1062 if (myself->has_pgid_children && myself->pid == myself->pgid)
1065 si.si_signo = -SIGHUP;
1066 si.si_code = SI_KERNEL;
1067 sigproc_printf ("%d == pgrp %d, send SIG{HUP,CONT} to stopped children",
1068 myself->pid, myself->pgid);
1069 kill_pgrp (myself->pgid, si);
1073 if (exit_state < ES_HUP_SID)
1075 exit_state = ES_HUP_SID;
1076 /* Kill the foreground process group on session leader exit */
1077 if (getpgrp () > 0 && myself->pid == myself->sid && real_tty_attached (myself))
1079 tty *tp = cygwin_shared->tty[myself->ctty];
1080 sigproc_printf ("%d == sid %d, send SIGHUP to children",
1081 myself->pid, myself->sid);
1083 /* CGF FIXME: This can't be right. */
1084 if (tp->getsid () == myself->sid)
1085 tp->kill_pgrp (SIGHUP);
1090 if (exit_state < ES_TITLE)
1092 exit_state = ES_TITLE;
1093 /* restore console title */
1094 if (old_title && display_title)
1095 set_console_title (old_title);
1098 if (exit_state < ES_TTY_TERMINATE)
1100 exit_state = ES_TTY_TERMINATE;
1101 cygwin_shared->tty.terminate ();
1107 static NO_COPY muto atexit_lock;
1110 cygwin_atexit (void (*function)(void))
1113 atexit_lock.init ("atexit_lock");
1114 atexit_lock.acquire ();
1115 res = atexit (function);
1116 atexit_lock.release ();
1123 dll_global_dtors ();
1125 atexit_lock.acquire ();
1132 do_exit (((DWORD) n & 0xff) << 8);
1136 __api_fatal (const char *fmt, ...)
1142 int n = __small_sprintf (buf, "%P: *** fatal error - ");
1143 __small_vsprintf (buf + n, fmt, ap);
1145 strace.prntf (_STRACE_SYSTEM, NULL, "%s", buf);
1150 myself.exit (__api_fatal_exit_val);
1154 multiple_cygwin_problem (const char *what, unsigned magic_version, unsigned version)
1156 if (_cygwin_testing && (strstr (what, "proc") || strstr (what, "cygheap")))
1158 child_proc_info->type = _PROC_WHOOPS;
1163 if (GetEnvironmentVariable ("CYGWIN_MISMATCH_OK", buf, sizeof (buf)))
1166 if (CYGWIN_VERSION_MAGIC_VERSION (magic_version) == version)
1167 system_printf ("%s magic number mismatch detected - %p/%p", what, magic_version, version);
1169 api_fatal ("%s mismatch detected - %p/%p.\n\
1170 This problem is probably due to using incompatible versions of the cygwin DLL.\n\
1171 Search for cygwin1.dll using the Windows Start->Find/Search facility\n\
1172 and delete all but the most recent version. The most recent version *should*\n\
1173 reside in x:\\cygwin\\bin, where 'x' is the drive on which you have\n\
1174 installed the cygwin distribution. Rebooting is also suggested if you\n\
1175 are unable to find another cygwin DLL.",
1176 what, magic_version, version);
1181 cygbench (const char *s)
1184 if (GetEnvironmentVariable ("CYGWIN_BENCH", buf, sizeof (buf)))
1185 small_printf ("%05d ***** %s : %10d\n", GetCurrentProcessId (), s, strace.microseconds ());