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Replace valid memory checks with new myfault class "exception handling", almost

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everywhere.  Leave some thread.cc stuff alone for now.
* cygtls.h: Kludge some definitions to avoid including a problematic windows
header.
(_cygtls::_myfault): New entry.
(_cygtls::_myfault_errno): Ditto.
(_cygtls::fault_guarded): New function.
(_cygtls::setup_fault): Ditto.
(_cygtls::return_from_fault): Ditto.
(_cygtls::clear_fault): Ditto.
(myfault): New class.
* exceptions.cc (handle_exceptions): Handle case of guarded fault in system
routine.
* gendef: Add another entry point for setjmp that the compiler doesn't know
about and won't complain about.
* gentls_offsets: Just include windows.h rather than kludging a HANDLE def.
* miscfuncs.cc (check_null_str): Delete.
(check_null_empty_str): Ditto.
(check_null_empty_str_errno): Ditto.
(check_null_str_errno): Ditto.
(__check_null_invalid_struct): Ditto.
(__check_null_invalid_struct_errno): Ditto.
(__check_invalid_read_ptr): Ditto.
(__check_invalid_read_ptr_errno): Ditto.
(dummytest): New function.
(check_iovec_for_read): Delete.
(chec_iovec): Rename from check_iovec_for_write.  Take a read/write parameter.
* tlsoffsets.h: Regenerate.
* winsup.h: Remove check_* declarations.
(check_iovec_for_read): Delete declaration.  Turn into a define instead.
(check_iovec_for_write): Ditto.
(check_iovec): New declaration.
* thread.h: Use ifdef guard name consistent with other header files.
This commit is contained in:
Christopher Faylor
2005-07-03 02:40:30 +00:00
parent 766bda7133
commit 893ac8e03c
32 changed files with 514 additions and 446 deletions
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21
winsup/cygwin/fhandler_tape.cc
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@@ -10,6 +10,7 @@ Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include "cygtls.h"
#include <sys/termios.h>
#include <unistd.h>
#include <stdlib.h>
@@ -967,10 +968,11 @@ mtinfo_drive::set_options (HANDLE mt, long options)
int
mtinfo_drive::ioctl (HANDLE mt, unsigned int cmd, void *buf)
{
myfault efault;
if (efault.faulted ())
return ERROR_NOACCESS;
if (cmd == MTIOCTOP)
{
if (__check_invalid_read_ptr (buf, sizeof (struct mtop)))
return ERROR_NOACCESS;
struct mtop *op = (struct mtop *) buf;
if (lasterr == ERROR_BUS_RESET)
{
@@ -1115,18 +1117,9 @@ mtinfo_drive::ioctl (HANDLE mt, unsigned int cmd, void *buf)
}
}
else if (cmd == MTIOCGET)
{
if (__check_null_invalid_struct (buf, sizeof (struct mtget)))
return ERROR_NOACCESS;
get_status (mt, (struct mtget *) buf);
}
else if (cmd == MTIOCPOS)
{
if (__check_null_invalid_struct (buf, sizeof (struct mtpos)))
return ERROR_NOACCESS;
if (!get_pos (mt))
((struct mtpos *) buf)->mt_blkno = block;
}
get_status (mt, (struct mtget *) buf);
else if (cmd == MTIOCPOS && !get_pos (mt))
((struct mtpos *) buf)->mt_blkno = block;
return lasterr;
}