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winecrt0: Add a fallback implementation of __wine_dbg_strdup(). 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2019-04-03 19:24:02 +02:00
parent c9bf52502c
commit d6060b7cf7
2 changed files with 63 additions and 0 deletions
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1
dlls/winecrt0/Makefile.in
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@ -1,6 +1,7 @@
MODULE = libwinecrt0.a
C_SRCS = \
debug.c \
delay_load.c \
dll_entry.c \
dll_main.c \

62
dlls/winecrt0/debug.c Normal file
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@ -0,0 +1,62 @@
/*
* Fallbacks for debugging functions when running on Windows
*
* Copyright 2019 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef _WIN32
#include "config.h"
#include "wine/port.h"
#include "windef.h"
#include "winbase.h"
#include "wine/debug.h"
static const char * (__cdecl *p__wine_dbg_strdup)( const char *str );
static void load_func( void **func, const char *name, void *def )
{
if (!*func)
{
HMODULE module = GetModuleHandleA( "ntdll.dll" );
void *proc = GetProcAddress( module, name );
interlocked_xchg_ptr( func, proc ? proc : def );
}
}
#define LOAD_FUNC(name) load_func( (void **)&p ## name, #name, fallback ## name )
/* FIXME: this is not 100% thread-safe */
static const char * __cdecl fallback__wine_dbg_strdup( const char *str )
{
static char *list[32];
static int pos;
char *ret = _strdup( str );
int idx;
idx = interlocked_xchg_add( &pos, 1 ) % ARRAY_SIZE(list);
free( interlocked_xchg_ptr( (void **)&list[idx], ret ));
return ret;
}
const char * __cdecl __wine_dbg_strdup( const char *str )
{
LOAD_FUNC( __wine_dbg_strdup );
return p__wine_dbg_strdup( str );
}
#endif /* _WIN32 */