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* tmpbuf.h: New file.

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* flock.cc: Include tmpbuf.h for new tmpbuf functionality.
(allow_others_to_sync): Use tmpbuf rather than tmp_pathbuf.  Explain why.
(lf_setlock): For consistency, use tmpbuf rather than tmp_pathbuf.
(lf_getlock): Ditto.
This commit is contained in:
Christopher Faylor 2010-06-21 19:55:12 +00:00
parent 94880465ac
commit f074bd3aef
3 changed files with 46 additions and 9 deletions
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9
winsup/cygwin/ChangeLog
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@ -1,3 +1,12 @@
2010-06-21 Christopher Faylor <me+cygwin@cgf.cx>
* tmpbuf.h: New file.
* flock.cc: Include tmpbuf.h for new tmpbuf functionality.
(allow_others_to_sync): Use tmpbuf rather than tmp_pathbuf. Explain
why.
(lf_setlock): For consistency, use tmpbuf rather than tmp_pathbuf.
(lf_getlock): Ditto.
2010-06-21 Christopher Faylor <me+cygwin@cgf.cx>
* dcrt0.cc (__api_fatal): Temporarily generate a stackdump.

19
winsup/cygwin/flock.cc
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@ -105,7 +105,7 @@
#include "pinfo.h"
#include "sigproc.h"
#include "cygtls.h"
#include "tls_pbuf.h"
#include "tmpbuf.h"
#include "ntdll.h"
#include <sys/queue.h>
#include <wchar.h>
@ -151,10 +151,11 @@ allow_others_to_sync ()
LPVOID ace;
ULONG len;
/* Get this process DACL. We use a temporary path buffer in TLS space
to avoid having to alloc 64K from the stack. */
tmp_pathbuf tp;
PSECURITY_DESCRIPTOR sd = (PSECURITY_DESCRIPTOR) tp.w_get ();
/* Get this process DACL. We use a temporary buffer to avoid having to
alloc 64K from the stack. Can't use tls functions at this point because
this gets called during initialization when the tls is not really
available. */
tmpbuf sd;
status = NtQuerySecurityObject (NtCurrentProcess (),
DACL_SECURITY_INFORMATION, sd,
NT_MAX_PATH * sizeof (WCHAR), &len);
@ -873,7 +874,7 @@ lf_setlock (lockf_t *lock, inode_t *node, lockf_t **clean, HANDLE fhdl)
lockf_t **head = lock->lf_head;
lockf_t **prev, *overlap;
int ovcase, priority, old_prio, needtolink;
tmp_pathbuf tp;
tmpbuf tp;
/*
* Set the priority
@ -885,7 +886,7 @@ lf_setlock (lockf_t *lock, inode_t *node, lockf_t **clean, HANDLE fhdl)
* Scan lock list for this file looking for locks that would block us.
*/
/* Create temporary space for the all locks list. */
node->i_all_lf = (lockf_t *) tp.w_get ();
node->i_all_lf = (lockf_t *) (void *) tp;
while ((block = lf_getblock(lock, node)))
{
DWORD ret;
@ -1227,10 +1228,10 @@ static int
lf_getlock (lockf_t *lock, inode_t *node, struct __flock64 *fl)
{
lockf_t *block;
tmp_pathbuf tp;
tmpbuf tp;
/* Create temporary space for the all locks list. */
node->i_all_lf = (lockf_t *) tp.w_get ();
node->i_all_lf = (lockf_t *) (void * ) tp;
if ((block = lf_getblock (lock, node)))
{
if (block->lf_obj)

27
winsup/cygwin/tmpbuf.h Normal file
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@ -0,0 +1,27 @@
/* tmpbuf.h
Copyright 2010 Red Hat, Inc.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _TMPBUF_H
#define _TMPBUF_H
class tmpbuf
{
void *buf;
public:
tmpbuf (size_t size = NT_MAX_PATH)
{
buf = calloc (1, size);
if (!buf)
api_fatal ("allocation of temporary buffer failed");
}
operator void * () {return buf;}
operator char * () {return (char *) buf;}
operator PSECURITY_DESCRIPTOR () {return (PSECURITY_DESCRIPTOR) buf;}
PSECURITY_DESCRIPTOR operator -> () {return (PSECURITY_DESCRIPTOR) buf;}
~tmpbuf () {free (buf);}
};
#endif /*_TMPBUF_H*/