diff options
Diffstat (limited to 'winsup/cygwin/shared.cc')
-rw-r--r-- | winsup/cygwin/shared.cc | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/winsup/cygwin/shared.cc b/winsup/cygwin/shared.cc deleted file mode 100644 index 9a91a1c08..000000000 --- a/winsup/cygwin/shared.cc +++ /dev/null @@ -1,280 +0,0 @@ -/* shared.cc: shared data area support. - - Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc. - -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 "winsup.h" -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <grp.h> -#include <pwd.h> -#include "pinfo.h" -#include "security.h" -#include "path.h" -#include "fhandler.h" -#include "dtable.h" -#include "cygerrno.h" -#include "cygheap.h" -#include "heap.h" -#include "shared_info_magic.h" -#include "registry.h" -#include "cygwin_version.h" -#include "child_info.h" - -shared_info NO_COPY *cygwin_shared; -user_info NO_COPY *user_shared; -HANDLE NO_COPY cygwin_user_h; - -char * __stdcall -shared_name (char *ret_buf, const char *str, int num) -{ - extern bool _cygwin_testing; - - __small_sprintf (ret_buf, "%s%s.%s.%d", cygheap->shared_prefix, - cygwin_version.shared_id, str, num); - if (_cygwin_testing) - strcat (ret_buf, cygwin_version.dll_build_date); - return ret_buf; -} - -#define page_const (65535) -#define pround(n) (((size_t) (n) + page_const) & ~page_const) - -static char *offsets[] = -{ - (char *) cygwin_shared_address, - (char *) cygwin_shared_address - + pround (sizeof (shared_info)), - (char *) cygwin_shared_address - + pround (sizeof (shared_info)) - + pround (sizeof (user_info)), - (char *) cygwin_shared_address - + pround (sizeof (shared_info)) - + pround (sizeof (user_info)) - + pround (sizeof (console_state)), - (char *) cygwin_shared_address - + pround (sizeof (shared_info)) - + pround (sizeof (user_info)) - + pround (sizeof (console_state)) - + pround (sizeof (_pinfo)) -}; - -void * __stdcall -open_shared (const char *name, int n, HANDLE &shared_h, DWORD size, - shared_locations m, PSECURITY_ATTRIBUTES psa) -{ - void *shared; - - void *addr; - if (!wincap.needs_memory_protection ()) - addr = NULL; - else - { - addr = offsets[m]; - (void) VirtualFree (addr, 0, MEM_RELEASE); - } - - if (!size) - return addr; - - if (!shared_h) - { - char *mapname; - char map_buf[CYG_MAX_PATH]; - if (!name) - mapname = NULL; - else - mapname = shared_name (map_buf, name, n); - if (!(shared_h = CreateFileMapping (INVALID_HANDLE_VALUE, psa, - PAGE_READWRITE, 0, size, mapname))) - api_fatal ("CreateFileMapping %s, %E. Terminating.", mapname); - } - - shared = (shared_info *) - MapViewOfFileEx (shared_h, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0, addr); - - if (!shared) - { - /* Probably win95, so try without specifying the address. */ - shared = (shared_info *) MapViewOfFileEx (shared_h, - FILE_MAP_READ|FILE_MAP_WRITE, - 0, 0, 0, 0); -#ifdef DEBUGGING - if (wincap.is_winnt ()) - system_printf ("relocating shared object %s(%d) from %p to %p on Windows NT", name, n, addr, shared); -#endif - } - - if (!shared) - api_fatal ("MapViewOfFileEx '%s'(%p), %E. Terminating.", name, shared_h); - - if (m == SH_CYGWIN_SHARED && wincap.needs_memory_protection ()) - { - unsigned delta = (char *) shared - offsets[0]; - offsets[0] = (char *) shared; - for (int i = SH_CYGWIN_SHARED + 1; i < SH_TOTAL_SIZE; i++) - { - unsigned size = offsets[i + 1] - offsets[i]; - offsets[i] += delta; - if (!VirtualAlloc (offsets[i], size, MEM_RESERVE, PAGE_NOACCESS)) - continue; /* oh well */ - } - offsets[SH_TOTAL_SIZE] += delta; - -#if 0 - if (!child_proc_info && wincap.needs_memory_protection ()) - for (DWORD s = 0x950000; s <= 0xa40000; s += 0x1000) - VirtualAlloc ((void *) s, 4, MEM_RESERVE, PAGE_NOACCESS); -#endif - } - - debug_printf ("name %s, shared %p (wanted %p), h %p", name, shared, addr, shared_h); - - return shared; -} - -void -user_shared_initialize (bool reinit) -{ - char name[UNLEN + 1] = ""; /* Large enough for SID */ - - if (reinit) - { - if (!UnmapViewOfFile (user_shared)) - debug_printf("UnmapViewOfFile %E"); - if (!ForceCloseHandle (cygwin_user_h)) - debug_printf("CloseHandle %E"); - cygwin_user_h = NULL; - } - - if (!cygwin_user_h) - { - if (wincap.has_security ()) - { - cygpsid tu (cygheap->user.sid ()); - tu.string (name); - } - else - strcpy (name, cygheap->user.name ()); - } - - user_shared = (user_info *) open_shared (name, USER_VERSION, - cygwin_user_h, sizeof (user_info), - SH_USER_SHARED, &sec_none); - debug_printf ("opening user shared for '%s' at %p", name, user_shared); - ProtectHandleINH (cygwin_user_h); - debug_printf ("user shared version %x", user_shared->version); - - /* Initialize the Cygwin per-user shared, if necessary */ - if (!user_shared->version) - { - user_shared->version = USER_VERSION_MAGIC; - debug_printf ("initializing user shared"); - user_shared->cb = sizeof (*user_shared); - if (user_shared->cb != sizeof (*user_shared)) - system_printf ("size of user shared region changed from %u to %u", - sizeof (*user_shared), user_shared->cb); - user_shared->mountinfo.init (); /* Initialize the mount table. */ - /* Initialize the queue of deleted files. */ - user_shared->delqueue.init (); - } - else if (user_shared->version != USER_VERSION_MAGIC) - multiple_cygwin_problem ("user", user_shared->version, USER_VERSION_MAGIC); - else if (user_shared->cb != sizeof (*user_shared)) - multiple_cygwin_problem ("user shared size", user_shared->cb, sizeof (*user_shared)); -} - -void -shared_info::initialize () -{ - DWORD sversion = (DWORD) InterlockedExchange ((LONG *) &version, SHARED_VERSION_MAGIC); - if (!sversion) - { - /* Initialize tty table. */ - tty.init (); - } - else - { - if (version != SHARED_VERSION_MAGIC) - { - multiple_cygwin_problem ("shared", version, SHARED_VERSION_MAGIC); - InterlockedExchange ((LONG *) &version, sversion); - } - while (!cb) - low_priority_sleep (0); // Should be hit only very very rarely - } - - heap_init (); - - if (!sversion) - cb = sizeof (*this); // Do last, after all shared memory initializion - - if (cb != SHARED_INFO_CB) - system_printf ("size of shared memory region changed from %u to %u", - SHARED_INFO_CB, cb); -} - -void __stdcall -memory_init () -{ - getpagesize (); - - /* Initialize the Cygwin heap, if necessary */ - if (!cygheap) - { - cygheap_init (); - cygheap->user.init (); - } - - /* Initialize general shared memory */ - cygwin_shared = (shared_info *) open_shared ("shared", - CYGWIN_VERSION_SHARED_DATA, - cygheap->shared_h, - sizeof (*cygwin_shared), - SH_CYGWIN_SHARED); - - cygwin_shared->initialize (); - ProtectHandleINH (cygheap->shared_h); - - user_shared_initialize (false); -} - -unsigned -shared_info::heap_chunk_size () -{ - if (!heap_chunk) - { - /* Fetch misc. registry entries. */ - - reg_key reg (KEY_READ, NULL); - - /* Note that reserving a huge amount of heap space does not result in - the use of swap since we are not committing it. */ - /* FIXME: We should not be restricted to a fixed size heap no matter - what the fixed size is. */ - - heap_chunk = reg.get_int ("heap_chunk_in_mb", 0); - if (!heap_chunk) { - reg_key r1 (HKEY_LOCAL_MACHINE, KEY_READ, "SOFTWARE", - CYGWIN_INFO_CYGNUS_REGISTRY_NAME, - CYGWIN_INFO_CYGWIN_REGISTRY_NAME, NULL); - heap_chunk = r1.get_int ("heap_chunk_in_mb", 384); - } - - if (heap_chunk < 4) - heap_chunk = 4 * 1024 * 1024; - else - heap_chunk <<= 20; - if (!heap_chunk) - heap_chunk = 384 * 1024 * 1024; - debug_printf ("fixed heap size is %u", heap_chunk); - } - - return heap_chunk; -} |