50ad198085
This patch has been inspired by the Linux kernel patch 294f69e662d1 compiler_attributes.h: Add 'fallthrough' pseudo keyword for switch/case use written by Joe Perches <joe AT perches DOT com> based on an idea from Dan Carpenter <dan DOT carpenter AT oracle DOT com>. The following text is from the original log message: Reserve the pseudo keyword 'fallthrough' for the ability to convert the various case block /* fallthrough */ style comments to appear to be an actual reserved word with the same gcc case block missing fallthrough warning capability. All switch/case blocks now should end in one of: break; fallthrough; goto <label>; return [expression]; continue; In C mode, GCC supports the __fallthrough__ attribute since 7.1, the same time the warning and the comment parsing were introduced. Cygwin-only: add an explicit -Wimplicit-fallthrough=5 to the build flags.
1351 lines
39 KiB
C++
1351 lines
39 KiB
C++
/* dcrt0.cc -- essentially the main() for the Cygwin dll
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include "miscfuncs.h"
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#include <unistd.h>
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#include <stdlib.h>
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#include "glob.h"
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#include <ctype.h>
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#include <locale.h>
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#include <sys/param.h>
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#include "environ.h"
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#include "sigproc.h"
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#include "pinfo.h"
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#include "cygerrno.h"
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#define NEED_VFORK
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#include "perprocess.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "child_info_magic.h"
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#include "cygtls.h"
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#include "shared_info.h"
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#include "cygwin_version.h"
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#include "dll_init.h"
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#include "heap.h"
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#include "tls_pbuf.h"
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#include "exception.h"
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#include "cygxdr.h"
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#include "fenv.h"
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#include "ntdll.h"
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#define MAX_AT_FILE_LEVEL 10
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#define PREMAIN_LEN (sizeof (user_data->premain) / sizeof (user_data->premain[0]))
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extern "C" void cygwin_exit (int) __attribute__ ((noreturn));
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extern "C" void __sinit (_reent *);
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static int NO_COPY envc;
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static char NO_COPY **envp;
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bool NO_COPY jit_debug;
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static void
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do_global_dtors ()
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{
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void (**pfunc) () = user_data->dtors;
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if (pfunc)
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{
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user_data->dtors = NULL;
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while (*++pfunc)
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(*pfunc) ();
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}
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}
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static void __stdcall
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do_global_ctors (void (**in_pfunc)(), int force)
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{
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if (!force && in_forkee)
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return; // inherit constructed stuff from parent pid
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/* Run ctors backwards, so skip the first entry and find how many
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there are, then run them. */
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void (**pfunc) () = in_pfunc;
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while (*++pfunc)
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;
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while (--pfunc > in_pfunc)
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(*pfunc) ();
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}
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/*
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* Replaces @file in the command line with the contents of the file.
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* There may be multiple @file's in a single command line
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* A \@file is replaced with @file so that echo \@foo would print
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* @foo and not the contents of foo.
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*/
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static bool __stdcall
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insert_file (char *name, char *&cmd)
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{
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HANDLE f;
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DWORD size;
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tmp_pathbuf tp;
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PWCHAR wname = tp.w_get ();
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sys_mbstowcs (wname, NT_MAX_PATH, name + 1);
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f = CreateFileW (wname,
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GENERIC_READ, /* open for reading */
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FILE_SHARE_VALID_FLAGS, /* share for reading */
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&sec_none_nih, /* default security */
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OPEN_EXISTING, /* existing file only */
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FILE_ATTRIBUTE_NORMAL, /* normal file */
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NULL); /* no attr. template */
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if (f == INVALID_HANDLE_VALUE)
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{
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debug_printf ("couldn't open file '%s', %E", name);
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return false;
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}
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/* This only supports files up to about 4 billion bytes in
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size. I am making the bold assumption that this is big
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enough for this feature */
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size = GetFileSize (f, NULL);
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if (size == 0xFFFFFFFF)
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{
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CloseHandle (f);
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debug_printf ("couldn't get file size for '%s', %E", name);
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return false;
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}
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int new_size = strlen (cmd) + size + 2;
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char *tmp = (char *) malloc (new_size);
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if (!tmp)
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{
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CloseHandle (f);
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debug_printf ("malloc failed, %E");
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return false;
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}
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/* realloc passed as it should */
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DWORD rf_read;
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BOOL rf_result;
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rf_result = ReadFile (f, tmp, size, &rf_read, NULL);
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CloseHandle (f);
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if (!rf_result || (rf_read != size))
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{
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free (tmp);
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debug_printf ("ReadFile failed, %E");
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return false;
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}
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tmp[size++] = ' ';
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strcpy (tmp + size, cmd);
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cmd = tmp;
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return true;
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}
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static inline int
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isquote (char c)
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{
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char ch = c;
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return ch == '"' || ch == '\'';
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}
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/* Step over a run of characters delimited by quotes */
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static /*__inline*/ char *
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quoted (char *cmd, int winshell)
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{
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char *p;
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char quote = *cmd;
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if (!winshell)
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{
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char *p;
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strcpy (cmd, cmd + 1);
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if (*(p = strchrnul (cmd, quote)))
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strcpy (p, p + 1);
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return p;
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}
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const char *s = quote == '\'' ? "'" : "\\\"";
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/* This must have been run from a Windows shell, so preserve
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quotes for globify to play with later. */
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while (*cmd && *++cmd)
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if ((p = strpbrk (cmd, s)) == NULL)
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{
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cmd = strchr (cmd, '\0'); // no closing quote
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break;
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}
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else if (*p == '\\')
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cmd = ++p;
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else if (quote == '"' && p[1] == '"')
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{
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*p = '\\';
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cmd = ++p; // a quoted quote
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}
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else
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{
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cmd = p + 1; // point to after end
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break;
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}
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return cmd;
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}
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/* Perform a glob on word if it contains wildcard characters.
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Also quote every character between quotes to force glob to
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treat the characters literally. */
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/* Either X:[...] or \\server\[...] */
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#define is_dos_path(s) (isdrive(s) \
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|| ((s)[0] == '\\' \
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&& (s)[1] == '\\' \
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&& isalpha ((s)[2]) \
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&& strchr ((s) + 3, '\\')))
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static int __stdcall
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globify (char *word, char **&argv, int &argc, int &argvlen)
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{
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if (*word != '~' && strpbrk (word, "?*[\"\'(){}") == NULL)
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return 0;
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int n = 0;
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char *p, *s;
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int dos_spec = is_dos_path (word);
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if (!dos_spec && isquote (*word) && word[1] && word[2])
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dos_spec = is_dos_path (word + 1);
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/* We'll need more space if there are quoting characters in
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word. If that is the case, doubling the size of the
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string should provide more than enough space. */
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if (strpbrk (word, "'\""))
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n = strlen (word);
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char pattern[strlen (word) + ((dos_spec + 1) * n) + 1];
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/* Fill pattern with characters from word, quoting any
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characters found within quotes. */
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for (p = pattern, s = word; *s != '\000'; s++, p++)
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if (!isquote (*s))
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{
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if (dos_spec && *s == '\\')
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*p++ = '\\';
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*p = *s;
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}
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else
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{
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char quote = *s;
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while (*++s && *s != quote)
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{
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if (dos_spec || *s != '\\')
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/* nothing */;
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else if (s[1] == quote || s[1] == '\\')
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s++;
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*p++ = '\\';
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size_t cnt = isascii (*s) ? 1 : mbtowc (NULL, s, MB_CUR_MAX);
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if (cnt <= 1 || cnt == (size_t)-1)
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*p++ = *s;
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else
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{
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--s;
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while (cnt-- > 0)
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*p++ = *++s;
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}
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}
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if (*s == quote)
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p--;
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if (*s == '\0')
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break;
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}
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*p = '\0';
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glob_t gl;
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gl.gl_offs = 0;
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/* Attempt to match the argument. Return just word (minus quoting) if no match. */
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if (glob (pattern, GLOB_TILDE | GLOB_NOCHECK | GLOB_BRACE | GLOB_QUOTE, NULL, &gl) || !gl.gl_pathc)
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return 0;
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/* Allocate enough space in argv for the matched filenames. */
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n = argc;
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if ((argc += gl.gl_pathc) > argvlen)
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{
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argvlen = argc + 10;
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argv = (char **) realloc (argv, (1 + argvlen) * sizeof (argv[0]));
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}
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/* Copy the matched filenames to argv. */
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char **gv = gl.gl_pathv;
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char **av = argv + n;
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while (*gv)
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{
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debug_printf ("argv[%d] = '%s'", n++, *gv);
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*av++ = *gv++;
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}
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/* Clean up after glob. */
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free (gl.gl_pathv);
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return 1;
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}
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/* Build argv, argc from string passed from Windows. */
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static void __stdcall
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build_argv (char *cmd, char **&argv, int &argc, int winshell)
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{
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int argvlen = 0;
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int nesting = 0; // monitor "nesting" from insert_file
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argc = 0;
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argvlen = 0;
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argv = NULL;
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/* Scan command line until there is nothing left. */
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while (*cmd)
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{
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/* Ignore spaces */
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if (issep (*cmd))
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{
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cmd++;
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continue;
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}
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/* Found the beginning of an argument. */
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char *word = cmd;
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char *sawquote = NULL;
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while (*cmd)
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{
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if (*cmd != '"' && (!winshell || *cmd != '\''))
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cmd++; // Skip over this character
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else
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/* Skip over characters until the closing quote */
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{
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sawquote = cmd;
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/* Handle quoting. Only strip off quotes if the parent is
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a Cygwin process, or if the word starts with a '@'.
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In this case, the insert_file function needs an unquoted
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DOS filename and globbing isn't performed anyway. */
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cmd = quoted (cmd, winshell && argc > 0 && *word != '@');
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}
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if (issep (*cmd)) // End of argument if space
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break;
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}
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if (*cmd)
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*cmd++ = '\0'; // Terminate `word'
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/* Possibly look for @file construction assuming that this isn't
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the very first argument and the @ wasn't quoted */
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if (argc && sawquote != word && *word == '@')
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{
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if (++nesting > MAX_AT_FILE_LEVEL)
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api_fatal ("Too many levels of nesting for %s", word);
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if (insert_file (word, cmd))
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continue; // There's new stuff in cmd now
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}
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/* See if we need to allocate more space for argv */
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if (argc >= argvlen)
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{
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argvlen = argc + 10;
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argv = (char **) realloc (argv, (1 + argvlen) * sizeof (argv[0]));
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}
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/* Add word to argv file after (optional) wildcard expansion. */
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if (!winshell || !argc || !globify (word, argv, argc, argvlen))
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{
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debug_printf ("argv[%d] = '%s'", argc, word);
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argv[argc++] = word;
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}
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}
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if (argv)
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argv[argc] = NULL;
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debug_printf ("argc %d", argc);
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}
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/* sanity and sync check */
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void __stdcall
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check_sanity_and_sync (per_process *p)
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{
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/* Sanity check to make sure developers didn't change the per_process */
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/* struct without updating SIZEOF_PER_PROCESS [it makes them think twice */
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/* about changing it]. */
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if (sizeof (per_process) != SIZEOF_PER_PROCESS)
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api_fatal ("per_process sanity check failed");
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/* Make sure that the app and the dll are in sync. */
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/* Complain if older than last incompatible change */
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if (p->dll_major < CYGWIN_VERSION_DLL_EPOCH)
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api_fatal ("cygwin DLL and APP are out of sync -- DLL version mismatch %u < %u",
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p->dll_major, CYGWIN_VERSION_DLL_EPOCH);
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/* magic_biscuit != 0 if using the old style version numbering scheme. */
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if (p->magic_biscuit != SIZEOF_PER_PROCESS)
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api_fatal ("Incompatible cygwin .dll -- incompatible per_process info %u != %u",
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p->magic_biscuit, SIZEOF_PER_PROCESS);
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/* Complain if incompatible API changes made */
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if (p->api_major > cygwin_version.api_major)
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api_fatal ("cygwin DLL and APP are out of sync -- API version mismatch %u > %u",
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p->api_major, cygwin_version.api_major);
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#ifdef __i386__
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/* This is a kludge to work around a version of _cygwin_common_crt0
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which overwrote the cxx_malloc field with the local DLL copy.
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Hilarity ensues if the DLL is not loaded while the process
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is forking. */
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__cygwin_user_data.cxx_malloc = &default_cygwin_cxx_malloc;
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#endif
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}
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child_info NO_COPY *child_proc_info;
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|
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/* Extend the stack prior to fork longjmp. */
|
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void
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child_info_fork::alloc_stack ()
|
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{
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PTEB teb = NtCurrentTeb ();
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if (teb->Tib.StackBase != stackbase)
|
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{
|
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void *stack_ptr;
|
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size_t stacksize;
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|
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/* If guardsize is -1, we have been started from a pthread with an
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application-provided stack, and the stack has just to be used as is. */
|
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if (guardsize == (size_t) -1)
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return;
|
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/* Reserve entire stack. */
|
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stacksize = (PBYTE) stackbase - (PBYTE) stackaddr;
|
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if (!VirtualAlloc (stackaddr, stacksize, MEM_RESERVE, PAGE_NOACCESS))
|
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{
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api_fatal ("fork: can't reserve memory for parent stack "
|
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"%p - %p, (child has %p - %p), %E",
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stackaddr, stackbase, teb->DeallocationStack,
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teb->Tib.StackBase);
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}
|
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/* Commit the area commited in parent. */
|
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stacksize = (PBYTE) stackbase - (PBYTE) stacklimit;
|
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stack_ptr = VirtualAlloc (stacklimit, stacksize, MEM_COMMIT,
|
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PAGE_READWRITE);
|
|
if (!stack_ptr)
|
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api_fatal ("can't commit memory for stack %p(%ly), %E",
|
|
stacklimit, stacksize);
|
|
/* Set up guardpages. */
|
|
ULONG real_guardsize = guardsize
|
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? roundup2 (guardsize, wincap.page_size ())
|
|
: wincap.def_guard_page_size ();
|
|
if (stack_ptr > stackaddr)
|
|
{
|
|
stack_ptr = (void *) ((PBYTE) stack_ptr - real_guardsize);
|
|
if (!VirtualAlloc (stack_ptr, real_guardsize, MEM_COMMIT,
|
|
PAGE_READWRITE | PAGE_GUARD))
|
|
api_fatal ("fork: couldn't allocate new stack guard page %p, %E",
|
|
stack_ptr);
|
|
}
|
|
/* Set thread stack guarantee matching the guardsize.
|
|
Note that the guardsize is one page bigger than the guarantee. */
|
|
if (real_guardsize > wincap.def_guard_page_size ())
|
|
{
|
|
real_guardsize -= wincap.page_size ();
|
|
SetThreadStackGuarantee (&real_guardsize);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Fork has been called from main thread. Simply commit the region
|
|
of the stack commited in the parent but not yet commited in the
|
|
child and create new guardpages. */
|
|
if (NtCurrentTeb ()->Tib.StackLimit > stacklimit)
|
|
{
|
|
SIZE_T commitsize = (PBYTE) NtCurrentTeb ()->Tib.StackLimit
|
|
- (PBYTE) stacklimit;
|
|
if (!VirtualAlloc (stacklimit, commitsize, MEM_COMMIT, PAGE_READWRITE))
|
|
api_fatal ("can't commit child memory for stack %p(%ly), %E",
|
|
stacklimit, commitsize);
|
|
PVOID guardpage = (PBYTE) stacklimit - wincap.def_guard_page_size ();
|
|
if (!VirtualAlloc (guardpage, wincap.def_guard_page_size (),
|
|
MEM_COMMIT, PAGE_READWRITE | PAGE_GUARD))
|
|
api_fatal ("fork: couldn't allocate new stack guard page %p, %E",
|
|
guardpage);
|
|
NtCurrentTeb ()->Tib.StackLimit = stacklimit;
|
|
}
|
|
/* This only affects forked children of a process started from a native
|
|
64 bit process, but it doesn't hurt to do it unconditionally. Fix
|
|
StackBase in the child to be the same as in the parent, so that the
|
|
computation of _my_tls is correct. */
|
|
teb->Tib.StackBase = (PVOID) stackbase;
|
|
}
|
|
}
|
|
|
|
extern "C" void
|
|
break_here ()
|
|
{
|
|
static int NO_COPY sent_break;
|
|
if (!sent_break++)
|
|
DebugBreak ();
|
|
debug_printf ("break here");
|
|
}
|
|
|
|
static void
|
|
initial_env ()
|
|
{
|
|
if (GetEnvironmentVariableA ("CYGWIN_TESTING", NULL, 0))
|
|
_cygwin_testing = 1;
|
|
|
|
#ifdef DEBUGGING
|
|
char buf[PATH_MAX];
|
|
if (GetEnvironmentVariableA ("CYGWIN_DEBUG", buf, sizeof (buf) - 1))
|
|
{
|
|
char buf1[PATH_MAX];
|
|
GetModuleFileName (NULL, buf1, PATH_MAX);
|
|
char *p = strpbrk (buf, ":=");
|
|
if (!p)
|
|
p = (char *) "gdb.exe -nw";
|
|
else
|
|
*p++ = '\0';
|
|
if (strcasestr (buf1, buf))
|
|
{
|
|
extern PWCHAR debugger_command;
|
|
|
|
debugger_command = (PWCHAR) HeapAlloc (GetProcessHeap (), 0,
|
|
(2 * NT_MAX_PATH + 20)
|
|
* sizeof (WCHAR));
|
|
if (!debugger_command)
|
|
return;
|
|
error_start_init (p);
|
|
jit_debug = true;
|
|
try_to_debug ();
|
|
console_printf ("*** Sending Break. gdb may issue spurious SIGTRAP message.\n");
|
|
break_here ();
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
child_info *
|
|
get_cygwin_startup_info ()
|
|
{
|
|
STARTUPINFO si;
|
|
|
|
GetStartupInfo (&si);
|
|
child_info *res = (child_info *) si.lpReserved2;
|
|
|
|
if (si.cbReserved2 < EXEC_MAGIC_SIZE || !res
|
|
|| res->intro != PROC_MAGIC_GENERIC || res->magic != CHILD_INFO_MAGIC)
|
|
{
|
|
strace.activate (false);
|
|
res = NULL;
|
|
}
|
|
else
|
|
{
|
|
if ((res->intro & OPROC_MAGIC_MASK) == OPROC_MAGIC_GENERIC)
|
|
multiple_cygwin_problem ("proc intro", res->intro, 0);
|
|
else if (res->cygheap != (void *) &_cygheap_start)
|
|
multiple_cygwin_problem ("cygheap base", (uintptr_t) res->cygheap,
|
|
(uintptr_t) &_cygheap_start);
|
|
|
|
unsigned should_be_cb = 0;
|
|
switch (res->type)
|
|
{
|
|
case _CH_FORK:
|
|
in_forkee = true;
|
|
should_be_cb = sizeof (child_info_fork);
|
|
fallthrough;
|
|
case _CH_SPAWN:
|
|
case _CH_EXEC:
|
|
if (!should_be_cb)
|
|
should_be_cb = sizeof (child_info_spawn);
|
|
if (should_be_cb != res->cb)
|
|
multiple_cygwin_problem ("proc size", res->cb, should_be_cb);
|
|
else if (sizeof (fhandler_union) != res->fhandler_union_cb)
|
|
multiple_cygwin_problem ("fhandler size", res->fhandler_union_cb,
|
|
sizeof (fhandler_union));
|
|
if (res->isstraced ())
|
|
{
|
|
while (!being_debugged ())
|
|
yield ();
|
|
strace.activate (res->type == _CH_FORK);
|
|
}
|
|
break;
|
|
default:
|
|
system_printf ("unknown exec type %u", res->type);
|
|
fallthrough;
|
|
case _CH_WHOOPS:
|
|
res = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
#ifdef __x86_64__
|
|
#define dll_data_start &__data_start__
|
|
#define dll_data_end &__data_end__
|
|
#define dll_bss_start &__bss_start__
|
|
#define dll_bss_end &__bss_end__
|
|
#else
|
|
#define dll_data_start &_data_start__
|
|
#define dll_data_end &_data_end__
|
|
#define dll_bss_start &_bss_start__
|
|
#define dll_bss_end &_bss_end__
|
|
#endif
|
|
|
|
void
|
|
child_info_fork::handle_fork ()
|
|
{
|
|
cygheap_fixup_in_child (false);
|
|
memory_init ();
|
|
myself.thisproc (NULL);
|
|
myself->uid = cygheap->user.real_uid;
|
|
myself->gid = cygheap->user.real_gid;
|
|
|
|
child_copy (parent, false, silentfail (),
|
|
"dll data", dll_data_start, dll_data_end,
|
|
"dll bss", dll_bss_start, dll_bss_end,
|
|
"user heap", cygheap->user_heap.base, cygheap->user_heap.ptr,
|
|
NULL);
|
|
|
|
/* If my_wr_proc_pipe != NULL then it's a leftover handle from a previously
|
|
forked process. Close it now or suffer confusion with the parent of our
|
|
parent. */
|
|
if (my_wr_proc_pipe)
|
|
ForceCloseHandle1 (my_wr_proc_pipe, wr_proc_pipe);
|
|
|
|
/* Setup our write end of the process pipe. Clear the one in the structure.
|
|
The destructor should never be called for this but, it can't hurt to be
|
|
safe. */
|
|
my_wr_proc_pipe = wr_proc_pipe;
|
|
rd_proc_pipe = wr_proc_pipe = NULL;
|
|
/* Do the relocations here. These will actually likely be overwritten by the
|
|
below child_copy but we do them here in case there is a read-only section
|
|
which does not get copied by fork. */
|
|
_pei386_runtime_relocator (user_data);
|
|
|
|
/* step 2 now that the dll has its heap filled in, we can fill in the
|
|
user's data and bss since user_data is now filled out. */
|
|
child_copy (parent, false, silentfail (),
|
|
"data", user_data->data_start, user_data->data_end,
|
|
"bss", user_data->bss_start, user_data->bss_end,
|
|
NULL);
|
|
|
|
if (fixup_mmaps_after_fork (parent))
|
|
api_fatal ("recreate_mmaps_after_fork_failed");
|
|
|
|
/* We need to occupy the address space for dynamically loaded dlls
|
|
before we allocate any dynamic object, or we may end up with
|
|
error "address space needed by <dll> is already occupied"
|
|
for no good reason (seen with some relocated dll). */
|
|
dlls.reserve_space ();
|
|
}
|
|
|
|
bool
|
|
child_info_spawn::get_parent_handle ()
|
|
{
|
|
parent = OpenProcess (PROCESS_VM_READ, FALSE, parent_winpid);
|
|
moreinfo->myself_pinfo = NULL;
|
|
return !!parent;
|
|
}
|
|
|
|
void
|
|
child_info_spawn::handle_spawn ()
|
|
{
|
|
extern void fixup_lockf_after_exec (bool);
|
|
HANDLE h = INVALID_HANDLE_VALUE;
|
|
if (!dynamically_loaded || get_parent_handle ())
|
|
{
|
|
cygheap_fixup_in_child (true);
|
|
memory_init ();
|
|
}
|
|
|
|
cygheap->pid = cygpid;
|
|
|
|
/* Spawned process sets h to INVALID_HANDLE_VALUE to notify
|
|
pinfo::thisproc not to create another pid. */
|
|
if (!moreinfo->myself_pinfo ||
|
|
!DuplicateHandle (GetCurrentProcess (), moreinfo->myself_pinfo,
|
|
GetCurrentProcess (), &h, 0,
|
|
FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE))
|
|
h = (type == _CH_SPAWN) ? INVALID_HANDLE_VALUE : NULL;
|
|
|
|
/* Setup our write end of the process pipe. Clear the one in the structure.
|
|
The destructor should never be called for this but, it can't hurt to be
|
|
safe. */
|
|
my_wr_proc_pipe = wr_proc_pipe;
|
|
rd_proc_pipe = wr_proc_pipe = NULL;
|
|
|
|
myself.thisproc (h);
|
|
__argc = moreinfo->argc;
|
|
__argv = moreinfo->argv;
|
|
envp = moreinfo->envp;
|
|
envc = moreinfo->envc;
|
|
if (!dynamically_loaded)
|
|
cygheap->fdtab.fixup_after_exec ();
|
|
if (__stdin >= 0)
|
|
cygheap->fdtab.move_fd (__stdin, 0);
|
|
if (__stdout >= 0)
|
|
cygheap->fdtab.move_fd (__stdout, 1);
|
|
cygheap->user.groups.clear_supp ();
|
|
|
|
/* If we're execing we may have "inherited" a list of children forked by the
|
|
previous process executing under this pid. Reattach them here so that we
|
|
can wait for them. */
|
|
if (type == _CH_EXEC)
|
|
reattach_children ();
|
|
|
|
ready (true);
|
|
|
|
if (child_proc_info->parent)
|
|
{
|
|
/* We no longer need this handle so close it. Need to do
|
|
this after debug_fixup_after_fork_exec or DEBUGGING handling of
|
|
handles might get confused. */
|
|
CloseHandle (child_proc_info->parent);
|
|
child_proc_info->parent = NULL;
|
|
}
|
|
|
|
signal_fixup_after_exec ();
|
|
fixup_lockf_after_exec (type == _CH_EXEC);
|
|
}
|
|
|
|
/* Retrieve and store system directory for later use. Note that the
|
|
directory is stored with a trailing backslash! */
|
|
static void
|
|
init_windows_system_directory ()
|
|
{
|
|
if (!windows_system_directory_length)
|
|
{
|
|
windows_system_directory_length =
|
|
GetSystemDirectoryW (windows_system_directory, MAX_PATH);
|
|
if (windows_system_directory_length == 0)
|
|
api_fatal ("can't find windows system directory");
|
|
windows_system_directory[windows_system_directory_length++] = L'\\';
|
|
windows_system_directory[windows_system_directory_length] = L'\0';
|
|
#ifdef __i386__
|
|
system_wow64_directory_length =
|
|
GetSystemWow64DirectoryW (system_wow64_directory, MAX_PATH);
|
|
if (system_wow64_directory_length)
|
|
{
|
|
system_wow64_directory[system_wow64_directory_length++] = L'\\';
|
|
system_wow64_directory[system_wow64_directory_length] = L'\0';
|
|
}
|
|
#endif /* __i386__ */
|
|
}
|
|
}
|
|
|
|
void
|
|
dll_crt0_0 ()
|
|
{
|
|
wincap.init ();
|
|
GetModuleFileNameW (NULL, global_progname, NT_MAX_PATH);
|
|
child_proc_info = get_cygwin_startup_info ();
|
|
init_windows_system_directory ();
|
|
initial_env ();
|
|
|
|
SetErrorMode (SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX);
|
|
|
|
lock_process::init ();
|
|
_impure_ptr = _GLOBAL_REENT;
|
|
_impure_ptr->_stdin = &_impure_ptr->__sf[0];
|
|
_impure_ptr->_stdout = &_impure_ptr->__sf[1];
|
|
_impure_ptr->_stderr = &_impure_ptr->__sf[2];
|
|
user_data->impure_ptr = _impure_ptr;
|
|
user_data->impure_ptr_ptr = &_impure_ptr;
|
|
|
|
DuplicateHandle (GetCurrentProcess (), GetCurrentThread (),
|
|
GetCurrentProcess (), &hMainThread,
|
|
0, false, DUPLICATE_SAME_ACCESS);
|
|
|
|
NtOpenProcessToken (NtCurrentProcess (), MAXIMUM_ALLOWED, &hProcToken);
|
|
set_cygwin_privileges (hProcToken);
|
|
|
|
device::init ();
|
|
do_global_ctors (&__CTOR_LIST__, 1);
|
|
cygthread::init ();
|
|
|
|
if (!child_proc_info)
|
|
{
|
|
setup_cygheap ();
|
|
memory_init ();
|
|
}
|
|
else
|
|
{
|
|
cygwin_user_h = child_proc_info->user_h;
|
|
switch (child_proc_info->type)
|
|
{
|
|
case _CH_FORK:
|
|
fork_info->handle_fork ();
|
|
break;
|
|
case _CH_SPAWN:
|
|
case _CH_EXEC:
|
|
spawn_info->handle_spawn ();
|
|
break;
|
|
}
|
|
}
|
|
|
|
user_data->threadinterface->Init ();
|
|
|
|
_main_tls = &_my_tls;
|
|
|
|
/* Initialize signal processing here, early, in the hopes that the creation
|
|
of a thread early in the process will cause more predictability in memory
|
|
layout for the main thread. */
|
|
if (!dynamically_loaded)
|
|
sigproc_init ();
|
|
|
|
#ifdef __x86_64__
|
|
/* See comment preceeding myfault_altstack_handler in exception.cc. */
|
|
AddVectoredContinueHandler (0, myfault_altstack_handler);
|
|
#endif
|
|
|
|
debug_printf ("finished dll_crt0_0 initialization");
|
|
}
|
|
|
|
static inline void
|
|
main_thread_sinit ()
|
|
{
|
|
__sinit (_impure_ptr);
|
|
/* At this point, _impure_ptr == _global_impure_ptr == _GLOBAL_REENT is
|
|
initialized, but _REENT == _my_tls.local_clib doesn't know about it.
|
|
It has been copied over from _GLOBAL_REENT in _cygtls::init_thread
|
|
*before* the initialization took place.
|
|
|
|
As soon as the main thread calls a stdio function, this would be
|
|
rectified. But if another thread calls a stdio function on
|
|
stdin/out/err before the main thread does, all the required
|
|
initialization of stdin/out/err will be done, but _REENT->__sdidinit
|
|
is *still* 0. This in turn will result in a call to __sinit in the
|
|
wrong spot. The input or output buffer will be NULLed and nothing is
|
|
read or written in the first stdio function call in the main thread.
|
|
|
|
To fix this issue we have to copy over the relevant part of _GLOBAL_REENT
|
|
to _REENT here again. */
|
|
_REENT->__sdidinit = -1;
|
|
_REENT->__cleanup = _GLOBAL_REENT->__cleanup;
|
|
}
|
|
|
|
/* Take over from libc's crt0.o and start the application. Note the
|
|
various special cases when Cygwin DLL is being runtime loaded (as
|
|
opposed to being link-time loaded by Cygwin apps) from a non
|
|
cygwin app via LoadLibrary. */
|
|
void
|
|
dll_crt0_1 (void *)
|
|
{
|
|
extern void initial_setlocale ();
|
|
|
|
_my_tls.incyg++;
|
|
/* Inherit "parent" exec'ed process sigmask */
|
|
if (spawn_info && !in_forkee)
|
|
_my_tls.sigmask = spawn_info->moreinfo->sigmask;
|
|
|
|
if (dynamically_loaded)
|
|
sigproc_init ();
|
|
|
|
check_sanity_and_sync (user_data);
|
|
|
|
/* Initialize malloc and then call user_shared_initialize since it relies
|
|
on a functioning malloc and it's possible that the user's program may
|
|
have overridden malloc. We only know about that at this stage,
|
|
unfortunately. */
|
|
malloc_init ();
|
|
user_shared->initialize ();
|
|
|
|
#ifdef CYGHEAP_DEBUG
|
|
int i = 0;
|
|
const int n = 2 * 1024 * 1024;
|
|
while (i--)
|
|
{
|
|
void *p = cmalloc (HEAP_STR, n);
|
|
if (p)
|
|
small_printf ("cmalloc returns %p\n", cmalloc (HEAP_STR, n));
|
|
else
|
|
{
|
|
small_printf ("total allocated %y\n", (i - 1) * n);
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
ProtectHandle (hMainThread);
|
|
|
|
cygheap->cwd.init ();
|
|
|
|
/* Initialize pthread mainthread when not forked and it is safe to call new,
|
|
otherwise it is reinitalized in fixup_after_fork */
|
|
if (!in_forkee)
|
|
{
|
|
pthread::init_mainthread ();
|
|
_pei386_runtime_relocator (user_data);
|
|
}
|
|
|
|
#ifdef DEBUGGING
|
|
strace.microseconds ();
|
|
#endif
|
|
|
|
/* Initialize debug muto, if DLL is built with --enable-debugging.
|
|
Need to do this before any helper threads start. */
|
|
debug_init ();
|
|
|
|
cygbench ("pre-forkee");
|
|
if (in_forkee)
|
|
{
|
|
/* Make sure to restore the TEB's stack info. If guardsize is -1 the
|
|
stack has been provided by the application and must not be deallocated
|
|
automagically when the thread exits.
|
|
|
|
NOTE: Don't do anything that involves the stack until you've completed
|
|
this step. */
|
|
PTEB teb = NtCurrentTeb ();
|
|
teb->Tib.StackBase = (PVOID) fork_info->stackbase;
|
|
teb->Tib.StackLimit = (PVOID) fork_info->stacklimit;
|
|
teb->DeallocationStack = (fork_info->guardsize == (size_t) -1)
|
|
? NULL
|
|
: (PVOID) fork_info->stackaddr;
|
|
|
|
/* Not resetting _my_tls.incyg here because presumably fork will overwrite
|
|
it with the value of the forker and all will be good. */
|
|
longjmp (fork_info->jmp, true);
|
|
}
|
|
|
|
main_thread_sinit ();
|
|
|
|
#ifdef DEBUGGING
|
|
{
|
|
extern void fork_init ();
|
|
fork_init ();
|
|
}
|
|
#endif
|
|
pinfo_init (envp, envc);
|
|
strace.dll_info ();
|
|
|
|
/* Allocate cygheap->fdtab */
|
|
dtable_init ();
|
|
|
|
/* Set internal locale to the environment settings. */
|
|
initial_setlocale ();
|
|
|
|
uinfo_init (); /* initialize user info */
|
|
|
|
/* Connect to tty. */
|
|
tty::init_session ();
|
|
|
|
if (!__argc)
|
|
{
|
|
PWCHAR wline = GetCommandLineW ();
|
|
size_t size = sys_wcstombs_no_path (NULL, 0, wline) + 1;
|
|
char *line = (char *) alloca (size);
|
|
sys_wcstombs_no_path (line, size, wline);
|
|
|
|
/* Scan the command line and build argv. Expand wildcards if not
|
|
called from another cygwin process. */
|
|
build_argv (line, __argv, __argc,
|
|
NOTSTATE (myself, PID_CYGPARENT) && allow_glob);
|
|
|
|
/* Convert argv[0] to posix rules if it's currently blatantly
|
|
win32 style. */
|
|
if ((strchr (__argv[0], ':')) || (strchr (__argv[0], '\\')))
|
|
{
|
|
char *new_argv0 = (char *) malloc (NT_MAX_PATH);
|
|
cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_RELATIVE, __argv[0],
|
|
new_argv0, NT_MAX_PATH);
|
|
__argv[0] = (char *) realloc (new_argv0, strlen (new_argv0) + 1);
|
|
}
|
|
}
|
|
|
|
__argc_safe = __argc;
|
|
if (user_data->premain[0])
|
|
for (unsigned int i = 0; i < PREMAIN_LEN / 2; i++)
|
|
user_data->premain[i] (__argc, __argv, user_data);
|
|
|
|
/* Set up standard fds in file descriptor table. */
|
|
cygheap->fdtab.stdio_init ();
|
|
|
|
/* Set up __progname for getopt error call. */
|
|
if (__argv[0] && (__progname = strrchr (__argv[0], '/')))
|
|
++__progname;
|
|
else
|
|
__progname = __argv[0];
|
|
program_invocation_name = __argv[0];
|
|
program_invocation_short_name = __progname;
|
|
if (__progname)
|
|
{
|
|
char *cp = strchr (__progname, '\0') - 4;
|
|
if (cp > __progname && ascii_strcasematch (cp, ".exe"))
|
|
*cp = '\0';
|
|
}
|
|
SetThreadName (GetCurrentThreadId (), program_invocation_short_name);
|
|
|
|
(void) xdr_set_vprintf (&cygxdr_vwarnx);
|
|
cygwin_finished_initializing = true;
|
|
/* Call init of loaded dlls. */
|
|
dlls.init ();
|
|
|
|
/* Execute any specified "premain" functions */
|
|
if (user_data->premain[PREMAIN_LEN / 2])
|
|
for (unsigned int i = PREMAIN_LEN / 2; i < PREMAIN_LEN; i++)
|
|
user_data->premain[i] (__argc, __argv, user_data);
|
|
|
|
set_errno (0);
|
|
|
|
if (dynamically_loaded)
|
|
{
|
|
_setlocale_r (_REENT, LC_CTYPE, "C");
|
|
return;
|
|
}
|
|
|
|
/* Disable case-insensitive globbing */
|
|
ignore_case_with_glob = false;
|
|
|
|
cygbench (__progname);
|
|
|
|
ld_preload ();
|
|
/* Per POSIX set the default application locale back to "C". */
|
|
_setlocale_r (_REENT, LC_CTYPE, "C");
|
|
|
|
if (!user_data->main)
|
|
{
|
|
/* Handle any signals which may have arrived */
|
|
_my_tls.call_signal_handler ();
|
|
_my_tls.incyg--; /* Not in Cygwin anymore */
|
|
}
|
|
else
|
|
{
|
|
/* Create a copy of Cygwin's version of __argv so that, if the user makes
|
|
a change to an element of argv[] it does not affect Cygwin's argv.
|
|
Changing the the contents of what argv[n] points to will still
|
|
affect Cygwin. This is similar (but not exactly like) Linux. */
|
|
char *newargv[__argc + 1];
|
|
char **nav = newargv;
|
|
char **oav = __argv;
|
|
while ((*nav++ = *oav++) != NULL)
|
|
continue;
|
|
/* Handle any signals which may have arrived */
|
|
sig_dispatch_pending (false);
|
|
_my_tls.call_signal_handler ();
|
|
_my_tls.incyg--; /* Not in Cygwin anymore */
|
|
#ifdef __x86_64__
|
|
cygwin_exit (user_data->main (__argc, newargv, __cygwin_environ));
|
|
#else
|
|
cygwin_exit (user_data->main (__argc, newargv, *user_data->envptr));
|
|
#endif
|
|
}
|
|
__asm__ (" \n\
|
|
.global _cygwin_exit_return \n\
|
|
.global __cygwin_exit_return \n\
|
|
_cygwin_exit_return: \n\
|
|
__cygwin_exit_return: \n\
|
|
nop \n\
|
|
");
|
|
}
|
|
|
|
extern "C" void __stdcall
|
|
_dll_crt0 ()
|
|
{
|
|
#ifdef __x86_64__
|
|
/* Starting with Windows 10 rel 1511, the main stack of an application is
|
|
not reproducible if a 64 bit process has been started from a 32 bit
|
|
process. Given that we have enough virtual address space on 64 bit
|
|
anyway, we now always move the main thread stack to the stack area
|
|
reserved for pthread stacks. This allows a reproducible stack space
|
|
under our own control and avoids collision with the OS. */
|
|
if (!dynamically_loaded)
|
|
{
|
|
if (!in_forkee)
|
|
{
|
|
/* Must be static since it's referenced after the stack and frame
|
|
pointer registers have been changed. */
|
|
static PVOID allocationbase;
|
|
SIZE_T commitsize = in_forkee ? (PBYTE) fork_info->stackbase
|
|
- (PBYTE) fork_info->stacklimit
|
|
: 0;
|
|
PVOID stackaddr = create_new_main_thread_stack (allocationbase,
|
|
commitsize);
|
|
if (stackaddr)
|
|
{
|
|
/* Set stack pointer to new address. Set frame pointer to
|
|
stack pointer and subtract 32 bytes for shadow space. */
|
|
__asm__ ("\n\
|
|
movq %[ADDR], %%rsp \n\
|
|
movq %%rsp, %%rbp \n\
|
|
subq $32,%%rsp \n"
|
|
: : [ADDR] "r" (stackaddr));
|
|
/* We're on the new stack now. Free up space taken by the former
|
|
main thread stack and set DeallocationStack correctly. */
|
|
VirtualFree (NtCurrentTeb ()->DeallocationStack, 0, MEM_RELEASE);
|
|
NtCurrentTeb ()->DeallocationStack = allocationbase;
|
|
}
|
|
}
|
|
else
|
|
fork_info->alloc_stack ();
|
|
}
|
|
#else
|
|
main_environ = user_data->envptr;
|
|
if (in_forkee)
|
|
fork_info->alloc_stack ();
|
|
#endif
|
|
|
|
_feinitialise ();
|
|
_main_tls = &_my_tls;
|
|
_main_tls->call ((DWORD (*) (void *, void *)) dll_crt0_1, NULL);
|
|
}
|
|
|
|
void
|
|
dll_crt0 (per_process *uptr)
|
|
{
|
|
/* Set the local copy of the pointer into the user space. */
|
|
if (!in_forkee && uptr && uptr != user_data)
|
|
{
|
|
memcpy (user_data, uptr, per_process_overwrite);
|
|
*(user_data->impure_ptr_ptr) = _GLOBAL_REENT;
|
|
}
|
|
_dll_crt0 ();
|
|
}
|
|
|
|
/* This must be called by anyone who uses LoadLibrary to load cygwin1.dll.
|
|
You must have CYGTLS_PADSIZE bytes reserved at the bottom of the stack
|
|
calling this function, and that storage must not be overwritten until you
|
|
unload cygwin1.dll, as it is used for _my_tls. It is best to load
|
|
cygwin1.dll before spawning any additional threads in your process.
|
|
|
|
See winsup/testsuite/cygload for an example of how to use cygwin1.dll
|
|
from MSVC and non-cygwin MinGW applications. */
|
|
extern "C" void
|
|
cygwin_dll_init ()
|
|
{
|
|
#ifdef __i386__
|
|
static char **envp;
|
|
#endif
|
|
static int _fmode;
|
|
|
|
user_data->magic_biscuit = sizeof (per_process);
|
|
|
|
#ifdef __i386__
|
|
user_data->envptr = &envp;
|
|
#endif
|
|
user_data->fmode_ptr = &_fmode;
|
|
|
|
_dll_crt0 ();
|
|
}
|
|
|
|
extern "C" void
|
|
__main (void)
|
|
{
|
|
/* Ordering is critical here. DLL ctors have already been
|
|
run as they were being loaded, so we should stack the
|
|
queued call to DLL dtors now. */
|
|
atexit (dll_global_dtors);
|
|
do_global_ctors (user_data->ctors, false);
|
|
/* Now we have run global ctors, register their dtors.
|
|
|
|
At exit, global dtors will run first, so the app can still
|
|
use shared library functions while terminating; then the
|
|
DLLs will be destroyed; finally newlib will shut down stdio
|
|
and terminate itself. */
|
|
atexit (do_global_dtors);
|
|
sig_dispatch_pending (true);
|
|
}
|
|
|
|
void __reg1
|
|
do_exit (int status)
|
|
{
|
|
syscall_printf ("do_exit (%d), exit_state %d", status, exit_state);
|
|
|
|
lock_process until_exit (true);
|
|
|
|
if (exit_state < ES_EVENTS_TERMINATE)
|
|
exit_state = ES_EVENTS_TERMINATE;
|
|
|
|
if (exit_state < ES_SIGNAL)
|
|
{
|
|
exit_state = ES_SIGNAL;
|
|
signal (SIGCHLD, SIG_IGN);
|
|
signal (SIGHUP, SIG_IGN);
|
|
signal (SIGINT, SIG_IGN);
|
|
signal (SIGQUIT, SIG_IGN);
|
|
}
|
|
|
|
if (exit_state < ES_CLOSEALL)
|
|
{
|
|
exit_state = ES_CLOSEALL;
|
|
close_all_files ();
|
|
}
|
|
|
|
UINT n = (UINT) status;
|
|
if (exit_state < ES_THREADTERM)
|
|
{
|
|
exit_state = ES_THREADTERM;
|
|
cygthread::terminate ();
|
|
}
|
|
|
|
myself->stopsig = 0;
|
|
|
|
if (exit_state < ES_HUP_PGRP)
|
|
{
|
|
exit_state = ES_HUP_PGRP;
|
|
/* Kill orphaned children on group leader exit */
|
|
if (myself->has_pgid_children && myself->pid == myself->pgid)
|
|
{
|
|
siginfo_t si = {0};
|
|
si.si_signo = -SIGHUP;
|
|
si.si_code = SI_KERNEL;
|
|
sigproc_printf ("%u == pgrp %u, send SIG{HUP,CONT} to stopped children",
|
|
myself->pid, myself->pgid);
|
|
kill_pgrp (myself->pgid, si);
|
|
}
|
|
}
|
|
|
|
if (exit_state < ES_HUP_SID)
|
|
{
|
|
exit_state = ES_HUP_SID;
|
|
/* Kill the foreground process group on session leader exit */
|
|
if (getpgrp () > 0 && myself->pid == myself->sid && real_tty_attached (myself))
|
|
{
|
|
tty *tp = cygwin_shared->tty[myself->ctty];
|
|
sigproc_printf ("%u == sid %u, send SIGHUP to children",
|
|
myself->pid, myself->sid);
|
|
|
|
/* CGF FIXME: This can't be right. */
|
|
if (tp->getsid () == myself->sid)
|
|
tp->kill_pgrp (SIGHUP);
|
|
}
|
|
|
|
}
|
|
|
|
myself.exit (n);
|
|
}
|
|
|
|
/* When introducing support for -fuse-cxa-atexit with Cygwin 1.7.32 and
|
|
GCC 4.8.3-3, we defined __dso_value as &ImageBase. This supposedly allowed
|
|
a reproducible value which could also be easily evaluated in cygwin_atexit.
|
|
However, when building C++ applications with -fuse-cxa-atexit, G++ creates
|
|
calls to __cxa_atexit using the *address* of __dso_handle as DSO handle.
|
|
|
|
So what we do here is this: A call to __cxa_atexit from the application
|
|
actually calls cygwin__cxa_atexit. From dso_handle (which is either
|
|
&__dso_handle, or __dso_handle == ImageBase or NULL) we fetch the dll
|
|
structure of the DLL. Then use dll::handle == ImageBase as the actual DSO
|
|
handle value in calls to __cxa_atexit and __cxa_finalize.
|
|
Thus, __cxa_atexit becomes entirely independent of the incoming value of
|
|
dso_handle, as long as it's *some* pointer into the DSO's address space. */
|
|
extern "C" int
|
|
cygwin__cxa_atexit (void (*fn)(void *), void *obj, void *dso_handle)
|
|
{
|
|
dll *d = dso_handle ? dlls.find (dso_handle) : NULL;
|
|
return __cxa_atexit (fn, obj, d ? d->handle : NULL);
|
|
}
|
|
|
|
/* This function is only called for applications built with Cygwin versions
|
|
up to API 0.279. Starting with API 0.280 (Cygwin 1.7.33/1.8.6-2), atexit
|
|
is a statically linked function inside of libcygwin.a. The reason is that
|
|
the old method to fetch the caller return address is unreliable given GCCs
|
|
ability to perform tail call elimination. For the details, see the below
|
|
comment. The atexit replacement is defined in libcygwin.a to allow reliable
|
|
access to the correct DSO handle. */
|
|
extern "C" int
|
|
cygwin_atexit (void (*fn) (void))
|
|
{
|
|
int res;
|
|
|
|
dll *d = dlls.find ((void *) _my_tls.retaddr ());
|
|
#ifdef __x86_64__
|
|
/* x86_64 DLLs created with GCC 4.8.3-3 register __gcc_deregister_frame
|
|
as atexit function using a call to atexit, rather than __cxa_atexit.
|
|
Due to GCC's tail call optimizing, cygwin_atexit doesn't get the correct
|
|
return address on the stack. As a result it fails to get the HMODULE of
|
|
the caller and thus calls atexit rather than __cxa_atexit. Then, if the
|
|
module gets dlclosed, __cxa_finalize (called from dll_list::detach) can't
|
|
remove __gcc_deregister_frame from the atexit function chain. So at
|
|
process exit, __call_exitprocs calls __gcc_deregister_frame while the
|
|
module is already unloaded and the __gcc_deregister_frame function not
|
|
available ==> SEGV.
|
|
|
|
This also occurs for other functions.
|
|
|
|
Workaround: If dlls.find fails, try to find the dll entry of the DLL
|
|
containing fn. If that works, proceed by calling __cxa_atexit, otherwise
|
|
call atexit.
|
|
|
|
This *should* be sufficiently safe. Ultimately, new applications will
|
|
use the statically linked atexit function though, as outlined above. */
|
|
if (!d)
|
|
d = dlls.find ((void *) fn);
|
|
#endif
|
|
res = d ? __cxa_atexit ((void (*) (void *)) fn, NULL, d->handle) : atexit (fn);
|
|
return res;
|
|
}
|
|
|
|
extern "C" void
|
|
cygwin_exit (int n)
|
|
{
|
|
exit_state = ES_EXIT_STARTING;
|
|
exit (n);
|
|
}
|
|
|
|
extern "C" void
|
|
_exit (int n)
|
|
{
|
|
do_exit (((DWORD) n & 0xff) << 8);
|
|
}
|
|
|
|
extern "C" void cygwin_stackdump ();
|
|
|
|
extern "C" void
|
|
vapi_fatal (const char *fmt, va_list ap)
|
|
{
|
|
char buf[4096];
|
|
int n = __small_sprintf (buf, "%P: *** fatal error %s- ", in_forkee ? "in forked process " : "");
|
|
__small_vsprintf (buf + n, fmt, ap);
|
|
va_end (ap);
|
|
strace.prntf (_STRACE_SYSTEM, NULL, "%s", buf);
|
|
|
|
#ifdef DEBUGGING
|
|
try_to_debug ();
|
|
#endif
|
|
cygwin_stackdump ();
|
|
myself.exit (__api_fatal_exit_val);
|
|
}
|
|
|
|
extern "C" void
|
|
api_fatal (const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start (ap, fmt);
|
|
vapi_fatal (fmt, ap);
|
|
}
|
|
|
|
void
|
|
multiple_cygwin_problem (const char *what, uintptr_t magic_version, uintptr_t version)
|
|
{
|
|
if (_cygwin_testing && (strstr (what, "proc") || strstr (what, "cygheap")))
|
|
{
|
|
child_proc_info->type = _CH_WHOOPS;
|
|
return;
|
|
}
|
|
|
|
if (GetEnvironmentVariableA ("CYGWIN_MISMATCH_OK", NULL, 0))
|
|
return;
|
|
|
|
if (CYGWIN_VERSION_MAGIC_VERSION (magic_version) == version)
|
|
system_printf ("%s magic number mismatch detected - %p/%ly", what, magic_version, version);
|
|
else
|
|
api_fatal ("%s mismatch detected - %ly/%ly.\n\
|
|
This problem is probably due to using incompatible versions of the cygwin DLL.\n\
|
|
Search for cygwin1.dll using the Windows Start->Find/Search facility\n\
|
|
and delete all but the most recent version. The most recent version *should*\n\
|
|
reside in x:\\cygwin\\bin, where 'x' is the drive on which you have\n\
|
|
installed the cygwin distribution. Rebooting is also suggested if you\n\
|
|
are unable to find another cygwin DLL.",
|
|
what, magic_version, version);
|
|
}
|
|
|
|
#ifdef DEBUGGING
|
|
void __reg1
|
|
cygbench (const char *s)
|
|
{
|
|
if (GetEnvironmentVariableA ("CYGWIN_BENCH", NULL, 0))
|
|
small_printf ("%05u ***** %s : %10d\n", GetCurrentProcessId (), s, strace.microseconds ());
|
|
}
|
|
#endif
|