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newlib/winsup/cygwin/winsup.h
Takashi Yano bb42852062 Cygwin: pty: Implement new pseudo console support. 
- In this implementation, pseudo console is created for each native
  console app. Advantages and disadvantages of this implementation
  over the previous implementation are as follows.

  Advantages:
  1) No performance degradation in pty output for cygwin process.
      https://cygwin.com/pipermail/cygwin/2020-February/243858.html
  2) Free from the problem caused by difference of behaviour of control
     sequences between real terminal and pseudo console.
      https://cygwin.com/pipermail/cygwin/2019-December/243281.html
      https://cygwin.com/pipermail/cygwin/2020-February/243855.html
  3) Free from the problem in cgdb and emacs gud.
      https://cygwin.com/pipermail/cygwin/2020-January/243601.html
      https://cygwin.com/pipermail/cygwin/2020-March/244146.html
  4) Redrawing screen on executing native console apps is not necessary.
  5) cygwin-console-helper is not necessary for the pseudo console
     support.
  6) The codes for pseudo console support are much simpler than that
     of the previous one.

  Disadvantages:
  1) The cygwin program which calls console API directly does not work.
  2) The apps which use console API cannot be debugged with gdb. This
     is because pseudo console is not activated since gdb uses
     CreateProcess() rather than exec(). Even with this limitation,
     attaching gdb to native apps, in which pseudo console is already
     activated, works.
  3) Typeahead key inputs are discarded while native console app is
     executed. Simirally, typeahead key inputs while cygwin app is
     executed are not inherited to native console app.
  4) Code page cannot be changed by chcp.com. Acctually, chcp works
     itself and changes code page of its own pseudo console.  However,
     since pseudo console is recreated for another process, it cannot
     inherit the code page.
  5) system_printf() does not work after stderr is closed. (Same with
     cygwin 3.0.7)
  6) Startup time of native console apps is about 3 times slower than
     previous implemenation.
  7) Pseudo console cannot be activated if it is already activated for
     another process on same pty.
2020-08-22 13:43:49 +02:00

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/* winsup.h: main Cygwin header file.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "config.h"
#define __INSIDE_CYGWIN__
#define NO_COPY_RO __attribute__((nocommon)) __attribute__((section(".rdata_cygwin_nocopy")))
#define NO_COPY __attribute__((nocommon)) __attribute__((section(".data_cygwin_nocopy")))
#define NO_COPY_INIT __attribute__((section(".data_cygwin_nocopy")))
#ifdef __cplusplus
#define EXPORT_ALIAS(sym,symalias) extern "C" __typeof (sym) symalias __attribute__ ((alias(#sym)));
#else
#define EXPORT_ALIAS(sym,symalias) __typeof (sym) symalias __attribute__ ((alias(#sym)));
#endif
#define fallthrough __attribute__((__fallthrough__))
#define _WIN32_WINNT 0x0a00
#define WINVER 0x0a00
#define _NO_W32_PSEUDO_MODIFIERS
/* Newlib's guarding functions more diligently based on their origin, starting
since 2013. To be sure to get everything and the kitchen sink, we have to
define _GNU_SOURCE. */
#define _GNU_SOURCE 1
#include <sys/types.h>
#include <sys/strace.h>
#include <sys/smallprint.h>
/* Declarations for functions used in C and C++ code. */
#ifdef __cplusplus
extern "C" {
#endif
uid_t getuid32 ();
uid_t geteuid32 ();
int seteuid32 (uid_t);
gid_t getegid32 (void);
struct passwd *getpwuid32 (uid_t);
struct passwd *getpwnam (const char *);
struct __sFILE64 *fopen64 (const char *, const char *);
struct hostent *cygwin_gethostbyname (const char *name);
/* Don't enforce definition of in_addr_t. */
uint32_t cygwin_inet_addr (const char *cp);
int fcntl64 (int fd, int cmd, ...);
#ifdef __cplusplus
}
#endif
/* Note that MAX_PATH is defined in the windows headers */
/* There is also PATH_MAX and MAXPATHLEN.
PATH_MAX is from Posix and does include the trailing NUL.
MAXPATHLEN is from Unix.
Thou shalt *not* use CYG_MAX_PATH anymore. Use NT_MAX_PATH or
dynamic allocation instead when accessing real files. Use
MAX_PATH in case you need a convenient small buffer when creating
names for synchronization objects or named pipes. */
#define CYG_MAX_PATH (MAX_PATH)
/* There's no define for the maximum path length the NT kernel can handle.
That's why we define our own to use in path length test and for path
buffer sizes. As MAX_PATH and PATH_MAX, this is defined including the
trailing 0. Internal buffers and internal path routines should use
NT_MAX_PATH. PATH_MAX as defined in limits.h is the maximum length of
application provided path strings we handle. */
#define NT_MAX_PATH 32768
/* This definition allows to define wide char strings using macros as
parameters. See the definition of __CONCAT in newlib's sys/cdefs.h
and accompanying comment. */
#define __WIDE(a) L ## a
#define _WIDE(a) __WIDE(a)
#include "winlean.h"
#ifdef __cplusplus
#include "wincap.h"
#include "regparm.h"
extern const unsigned char case_folded_lower[];
#define cyg_tolower(c) ((char) case_folded_lower[(unsigned char)(c)])
extern const unsigned char case_folded_upper[];
#define cyg_toupper(c) ((char) case_folded_upper[(unsigned char)(c)])
#define cfree newlib_cfree_dont_use
/* Used as type by sys_wcstombs_alloc and sys_mbstowcs_alloc. For a
description see there. */
#define HEAP_NOTHEAP -1
/* Used to check if Cygwin DLL is dynamically loaded. */
extern int cygserver_running;
#define _MT_SAFE // DELETEME someday
#define TITLESIZE 1024
#include "debug.h"
#include <wchar.h>
/**************************** Convenience ******************************/
/* Used to define status flag accessor methods */
#define IMPLEMENT_STATUS_FLAG(type,flag) \
type flag (type val) { return (type) (status.flag = (val)); } \
type flag () const { return (type) status.flag; }
/* Used when treating / and \ as equivalent. */
#define iswdirsep(ch) \
({ \
WCHAR __c = (ch); \
((__c) == L'/' || (__c) == L'\\'); \
})
#define isdirsep(ch) \
({ \
char __c = (ch); \
((__c) == '/' || (__c) == '\\'); \
})
/* Convert a signal to a signal mask */
#define SIGTOMASK(sig) ((sigset_t) 1 << ((sig) - 1))
#define set_api_fatal_return(n) do {extern int __api_fatal_exit_val; __api_fatal_exit_val = (n);} while (0)
#undef issep
#define issep(ch) (strchr (" \t\n\r", (ch)) != NULL)
/* Every path beginning with / or \, as well as every path being X:
or starting with X:/ or X:\ */
#define isabspath_u(p) \
((p)->Length && \
(iswdirsep ((p)->Buffer[0]) || \
((p)->Length > sizeof (WCHAR) && iswalpha ((p)->Buffer[0]) \
&& (p)->Buffer[1] == L':' && \
((p)->Length == 2 * sizeof (WCHAR) || iswdirsep ((p)->Buffer[2])))))
#define iswabspath(p) \
(iswdirsep (*(p)) || (iswalpha (*(p)) && (p)[1] == L':' && (!(p)[2] || iswdirsep ((p)[2]))))
#define isabspath(p) \
(isdirsep (*(p)) || (isalpha (*(p)) && (p)[1] == ':' && (!(p)[2] || isdirsep ((p)[2]))))
/******************** Initialization/Termination **********************/
class per_process;
/* cygwin .dll initialization */
void dll_crt0 (per_process *) __asm__ (_SYMSTR (dll_crt0__FP11per_process));
extern "C" void __stdcall _dll_crt0 ();
void dll_crt0_1 (void *);
void dll_dllcrt0_1 (void *);
/* dynamically loaded dll initialization */
extern "C" PVOID dll_dllcrt0 (HMODULE, per_process *);
extern "C" void _pei386_runtime_relocator (per_process *);
#ifdef __i386__
/* dynamically loaded dll initialization for non-cygwin apps */
extern "C" int dll_noncygwin_dllcrt0 (HMODULE, per_process *);
#endif /* __i386__ */
void __reg1 do_exit (int) __attribute__ ((noreturn));
/* libstdc++ malloc operator wrapper support. */
extern struct per_process_cxx_malloc default_cygwin_cxx_malloc;
#define ILLEGAL_SEEK ((off_t)-1)
/* Convert LARGE_INTEGER into long long */
#define get_ll(pl) (((long long) (pl).HighPart << 32) | (pl).LowPart)
/* various events */
void events_init ();
int chmod_device (class path_conv& pc, mode_t mode);
void close_all_files (bool = false);
/* debug_on_trap support. see exceptions.cc:try_to_debug() */
extern "C" void error_start_init (const char*);
extern "C" int try_to_debug (bool waitloop = 1);
void ld_preload ();
void fixup_hooks_after_fork ();
const char *find_first_notloaded_dll (class path_conv &);
/**************************** Miscellaneous ******************************/
void __stdcall set_std_handle (int);
int __stdcall stat_dev (DWORD, int, unsigned long, struct stat *);
ino_t __reg2 hash_path_name (ino_t hash, PUNICODE_STRING name);
ino_t __reg2 hash_path_name (ino_t hash, PCWSTR name);
ino_t __reg2 hash_path_name (ino_t hash, const char *name);
void __reg2 nofinalslash (const char *src, char *dst);
void __reg3 *hook_or_detect_cygwin (const char *, const void *, WORD&, HANDLE h = NULL);
void __reg3 *hook_api (const char *mname, const char *name, const void *fn);
/* Time related */
void __stdcall totimeval (struct timeval *, PLARGE_INTEGER, int, int);
time_t __stdcall to_time_t (PLARGE_INTEGER);
void __stdcall to_timestruc_t (PLARGE_INTEGER, timestruc_t *);
void __stdcall time_as_timestruc_t (timestruc_t *);
void __stdcall timeval_to_filetime (const struct timeval *, PLARGE_INTEGER);
void __stdcall timespec_to_filetime (const struct timespec *, PLARGE_INTEGER);
bool timeval_to_ms (const struct timeval *, DWORD &);
/* Console related */
void __stdcall set_console_title (char *);
void init_console_handler (bool);
extern bool wsock_started;
/* Printf type functions */
extern "C" void vapi_fatal (const char *, va_list ap) __attribute__ ((noreturn));
extern "C" void api_fatal (const char *, ...) __attribute__ ((noreturn));
int __small_swprintf (PWCHAR dst, const WCHAR *fmt, ...);
int __small_vswprintf (PWCHAR dst, const WCHAR *fmt, va_list ap);
void multiple_cygwin_problem (const char *, uintptr_t, uintptr_t);
bool child_copy (HANDLE, bool, bool, ...);
class path_conv;
int __reg2 stat_worker (path_conv &pc, struct stat *buf);
ino_t __reg2 readdir_get_ino (const char *path, bool dot_dot);
/* mmap functions. */
enum mmap_region_status
{
MMAP_NONE,
MMAP_RAISE_SIGBUS,
MMAP_NORESERVE_COMMITED
};
mmap_region_status mmap_is_attached_or_noreserve (void *addr, size_t len);
bool is_mmapped_region (caddr_t start_addr, caddr_t end_address);
extern inline bool flush_file_buffers (HANDLE h)
{
return (GetFileType (h) != FILE_TYPE_PIPE) ? FlushFileBuffers (h) : true;
}
#define FlushFileBuffers flush_file_buffers
/* Make sure that regular ExitThread is never called */
#define ExitThread exit_thread
/*************************** Unsorted ******************************/
#define WM_ASYNCIO 0x8000 // WM_APP
#define STD_RBITS (S_IRUSR | S_IRGRP | S_IROTH)
#define STD_WBITS (S_IWUSR)
#define STD_XBITS (S_IXUSR | S_IXGRP | S_IXOTH)
#define NO_W ~(S_IWUSR | S_IWGRP | S_IWOTH)
#define NO_R ~(S_IRUSR | S_IRGRP | S_IROTH)
#define NO_X ~(S_IXUSR | S_IXGRP | S_IXOTH)
#ifdef __x86_64__
extern "C" char __data_start__, __data_end__, __bss_start__, __bss_end__;
#else
extern "C" char _data_start__, _data_end__, _bss_start__, _bss_end__;
#endif
extern "C" void (*__CTOR_LIST__) (void);
extern "C" void (*__DTOR_LIST__) (void);
#ifdef NEEDED
/* This was inexplicably needed after updating a toolchain.
The need disappeared when updating further but I'm keeping
it around temporarily in case the issue crops up again.
This manifests as SEGVs in one of the Interlocked functions below
in kernel32.dll. */
#define InterlockedDecrement _InterlockedDecrement
#define InterlockedExchange _InterlockedExchange
#define InterlockedIncrement _InterlockedIncrement
#endif /*NEEDED*/
#ifndef NO_GLOBALS_H
#define _RDATA /* See globals.h */
#include "globals.h"
extern inline void clear_procimptoken ()
{
if (hProcImpToken)
{
HANDLE old_procimp = hProcImpToken;
hProcImpToken = NULL;
CloseHandle (old_procimp);
}
}
#endif /*NO_GLOBALS_H*/
#endif /* defined __cplusplus */
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