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newlib-cygwin/newlib/libc/reent/reent.c

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import newlib-2000-02-17 snapshot
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/*
FUNCTION
<<reent>>---definition of impure data.
INDEX
reent
DESCRIPTION
This module defines the impure data area used by the
2001-03-21 Egor Duda <deo@logos-m.ru> Allow building internal stubs for non-reentrant syscalls if target provides its own malloc * libc/reent/reent.c (errno): Move definition here. * libc/reent/sbrkr.c: From here.
2001-03-22 05:47:31 +08:00
non-reentrant functions, such as strtok.
import newlib-2000-02-17 snapshot
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*/
2000-08-23 Werner Almesberger <Werner.Almesberger@epfl.ch> * libc/stdlib/mprec.c (ulp, b2d, d2b): changed a few expressions like x << y-z to the equivalent x << (y-z). (d2b): changed if statements with assignment to perform the assignment prior to the if check. * libc/reent/reent.c: included stdlib.h for "_free_r" prototype. * libc/unix/getpass.c (getpass): moved "echo" assignment out of if. * libc/unix/ttyname.c: included string.h for "strcpy" prototype. * libc/unix/getcwd.c (ISDOT): added parentheses to clarify && and || precedence. * libc/include/sys/unistd.h: added "vfork" prototype (for popen.c). Added "_execve" prototype (for execl.c, execle.c, execv.c, and execve.c). * libc/posix/popen.c (popen): added parentheses to clarify && and || precedence. * libm/math/e_cosh.c (__ieee754_cosh): changed parentheses to clarify && and || precendence (and to remove pascalism). * libm/math/e_sinh.c (__ieee754_sinh): Ditto. * libm/math/s_infconst.c: added another pair of braces to all initializers for __infinity (need three: for __infinity[1] array, for union __dmath, and for i[2]).
2000-08-25 06:32:38 +08:00
#include <stdlib.h>
import newlib-2000-02-17 snapshot
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#include <reent.h>
2001-03-21 Egor Duda <deo@logos-m.ru> Allow building internal stubs for non-reentrant syscalls if target provides its own malloc * libc/reent/reent.c (errno): Move definition here. * libc/reent/sbrkr.c: From here.
2001-03-22 05:47:31 +08:00
#ifdef _REENT_ONLY
#ifndef REENTRANT_SYSCALLS_PROVIDED
#define REENTRANT_SYSCALLS_PROVIDED
#endif
#endif
#ifndef REENTRANT_SYSCALLS_PROVIDED
/* We use the errno variable used by the system dependent layer. */
#undef errno
int errno;
#endif
import newlib-2000-02-17 snapshot
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void
ansification: remove _DEFUN Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
2017-12-04 11:43:30 +08:00
_reclaim_reent (struct _reent *ptr)
import newlib-2000-02-17 snapshot
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{
Add --enable-newlib-reent-thread-local option By default, Newlib uses a huge object of type struct _reent to store thread-specific data. This object is returned by __getreent() if the __DYNAMIC_REENT__ Newlib configuration option is defined. The reentrancy structure contains for example errno and the standard input, output, and error file streams. This means that if an application only uses errno it has a dependency on the file stream support even if it does not use it. This is an issue for lower end targets and applications which need to qualify the software according to safety standards (for example ECSS-E-ST-40C, ECSS-Q-ST-80C, IEC 61508, ISO 26262, DO-178, DO-330, DO-333). If the new _REENT_THREAD_LOCAL configuration option is enabled, then struct _reent is replaced by dedicated thread-local objects for each struct _reent member. The thread-local objects are defined in translation units which use the corresponding object.
2022-05-16 17:51:54 +08:00
#ifndef _REENT_THREAD_LOCAL
import newlib-2000-02-17 snapshot
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if (ptr != _impure_ptr)
Add --enable-newlib-reent-thread-local option By default, Newlib uses a huge object of type struct _reent to store thread-specific data. This object is returned by __getreent() if the __DYNAMIC_REENT__ Newlib configuration option is defined. The reentrancy structure contains for example errno and the standard input, output, and error file streams. This means that if an application only uses errno it has a dependency on the file stream support even if it does not use it. This is an issue for lower end targets and applications which need to qualify the software according to safety standards (for example ECSS-E-ST-40C, ECSS-Q-ST-80C, IEC 61508, ISO 26262, DO-178, DO-330, DO-333). If the new _REENT_THREAD_LOCAL configuration option is enabled, then struct _reent is replaced by dedicated thread-local objects for each struct _reent member. The thread-local objects are defined in translation units which use the corresponding object.
2022-05-16 17:51:54 +08:00
#endif
import newlib-2000-02-17 snapshot
2000-02-18 03:39:52 +08:00
{
/* used by mprec routines. */
* implement a new `struct _reent' that is significantly smaller. use this if _REENT_SMALL is defined in config.h. define this for xstormy16.
2002-02-03 17:24:18 +08:00
#ifdef _REENT_SMALL
if (ptr->_mp) /* don't bother allocating it! */
* libc/reent/reent.c (_reclaim_reent): Make a block from MP-related statements in _REENT_SMALL case. Check if _atexit is not NULL before dereferencing it. (_wrapup_reent): Check if _atexit is not NULL before dereferencing it.
2009-03-07 01:11:20 +08:00
{
* implement a new `struct _reent' that is significantly smaller. use this if _REENT_SMALL is defined in config.h. define this for xstormy16.
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#endif
if (_REENT_MP_FREELIST(ptr))
import newlib-2000-02-17 snapshot
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{
int i;
Use NetBSD fix for CVE-2009-0689 security vulnerability. * libc/include/sys/reent.h (_Kmax): Define here based on the sizeof size_t, as in latest NetBSD. * libc/reent/reent.c (_reclaim_reent): Use _Kmax rather than constant value 15. * libc/stdlib/mprec.c (_Kmax): Don't define here. Explain why.
2009-11-24 01:02:20 +08:00
for (i = 0; i < _Kmax; i++)
import newlib-2000-02-17 snapshot
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{
struct _Bigint *thisone, *nextone;
* implement a new `struct _reent' that is significantly smaller. use this if _REENT_SMALL is defined in config.h. define this for xstormy16.
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nextone = _REENT_MP_FREELIST(ptr)[i];
import newlib-2000-02-17 snapshot
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while (nextone)
{
thisone = nextone;
nextone = nextone->_next;
_free_r (ptr, thisone);
}
}
* implement a new `struct _reent' that is significantly smaller. use this if _REENT_SMALL is defined in config.h. define this for xstormy16.
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_free_r (ptr, _REENT_MP_FREELIST(ptr));
import newlib-2000-02-17 snapshot
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}
* libc/reent/reeent.c (_reclaim_reent): Free _REENT_MP_RESULT.
2006-10-11 16:04:50 +08:00
if (_REENT_MP_RESULT(ptr))
_free_r (ptr, _REENT_MP_RESULT(ptr));
* libc/reent/reent.c (_reclaim_reent): Make a block from MP-related statements in _REENT_SMALL case. Check if _atexit is not NULL before dereferencing it. (_wrapup_reent): Check if _atexit is not NULL before dereferencing it.
2009-03-07 01:11:20 +08:00
#ifdef _REENT_SMALL
}
#endif
import newlib-2000-02-17 snapshot
2000-02-18 03:39:52 +08:00
* implement a new `struct _reent' that is significantly smaller. use this if _REENT_SMALL is defined in config.h. define this for xstormy16.
2002-02-03 17:24:18 +08:00
#ifdef _REENT_SMALL
Define _REENT_EMERGENCY(ptr) only once Use this macro to access the _emergency member of struct _reent. This macro will help to replace the _emergency member of struct _reent with a thread-local storage object in a follow up patch.
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if (_REENT_EMERGENCY(ptr))
_free_r (ptr, _REENT_EMERGENCY(ptr));
* implement a new `struct _reent' that is significantly smaller. use this if _REENT_SMALL is defined in config.h. define this for xstormy16.
2002-02-03 17:24:18 +08:00
if (ptr->_mp)
_free_r (ptr, ptr->_mp);
if (ptr->_r48)
_free_r (ptr, ptr->_r48);
if (ptr->_localtime_buf)
_free_r (ptr, ptr->_localtime_buf);
if (ptr->_asctime_buf)
_free_r (ptr, ptr->_asctime_buf);
* libc/reent/reent.c (_reclaim_reent): Free also _misc and _signal_buf.
2013-06-24 19:34:03 +08:00
if (ptr->_signal_buf)
_free_r (ptr, ptr->_signal_buf);
if (ptr->_misc)
_free_r (ptr, ptr->_misc);
2013-05-07 Sebastian Huber <sebastian.huber@embedded-brains.de> * libc/include/sys/config.h (_REENT_GLOBAL_ATEXIT): Define for RTEMS. * libc/include/sys/reent.h (_reent): Use _REENT_GLOBAL_ATEXIT. (_global_atexit): Declare if _REENT_GLOBAL_ATEXIT is defined. * libc/reent/reent.c (_reclaim_reent): Remove atexit cleanup if _REENT_GLOBAL_ATEXIT is defined. (_wrapup_reent): Remove atexit handling if _REENT_GLOBAL_ATEXIT is defined. * libc/stdlib/__atexit.c (_global_atexit0): Define if _REENT_GLOBAL_ATEXIT is defined. * libc/stdlib/__call_atexit.c (_global_atexit): Define if _REENT_GLOBAL_ATEXIT is defined.
2013-05-09 07:13:51 +08:00
#endif
Add _REENT_CVTBUF(ptr) Add a _REENT_CVTBUF() macro to encapsulate access to the _cvtbuf member of struct reent. This will help to replace the struct member with a thread-local storage object in a follow up patch.
2022-02-03 19:24:26 +08:00
if (_REENT_CVTBUF(ptr))
_free_r (ptr, _REENT_CVTBUF(ptr));
* libc/reent/reent.c (_reclaim_reent): Free also _misc and _signal_buf.
2013-06-24 19:34:03 +08:00
/* We should free _sig_func to avoid a memory leak, but how to
do it safely considering that a signal may be delivered immediately
after the free?
Add _REENT_SIG_FUNC(ptr) Add a _REENT_SIG_FUNC() macro to encapsulate access to the _sig_func member of struct reent. This will help to replace the struct member with a thread-local storage object in a follow up patch.
2022-02-04 18:47:18 +08:00
if (_REENT_SIG_FUNC(ptr))
_free_r (ptr, _REENT_SIG_FUNC(ptr));*/
import newlib-2000-02-17 snapshot
2000-02-18 03:39:52 +08:00
Add _REENT_CLEANUP(ptr) Add a _REENT_CLEANUP() macro to encapsulate access to the __cleanup member of struct reent. This will help to replace the struct member with a thread-local storage object in a follow up patch.
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if (_REENT_CLEANUP(ptr))
import newlib-2000-02-17 snapshot
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{
/* cleanup won't reclaim memory 'coz usually it's run
before the program exits, and who wants to wait for that? */
Add _REENT_CLEANUP(ptr) Add a _REENT_CLEANUP() macro to encapsulate access to the __cleanup member of struct reent. This will help to replace the struct member with a thread-local storage object in a follow up patch.
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_REENT_CLEANUP(ptr) (ptr);
import newlib-2000-02-17 snapshot
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}
/* Malloc memory not reclaimed; no good way to return memory anyway. */
}
}