Sweden-Number/dlls/winecrt0/debug.c

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/*
* 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 __WINE_PE_BUILD
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wine/debug.h"
#include "wine/heap.h"
WINE_DECLARE_DEBUG_CHANNEL(pid);
WINE_DECLARE_DEBUG_CHANNEL(timestamp);
static const char * (__cdecl *p__wine_dbg_strdup)( const char *str );
static int (__cdecl *p__wine_dbg_output)( const char *str );
static unsigned char (__cdecl *p__wine_dbg_get_channel_flags)( struct __wine_debug_channel *channel );
static int (__cdecl *p__wine_dbg_header)( enum __wine_debug_class cls,
struct __wine_debug_channel *channel,
const char *function );
static const char * const debug_classes[] = { "fixme", "err", "warn", "trace" };
static unsigned char default_flags = (1 << __WINE_DBCL_ERR) | (1 << __WINE_DBCL_FIXME);
static int nb_debug_options = -1;
static int options_size;
static struct __wine_debug_channel *debug_options;
static DWORD partial_line_tid; /* id of the last thread to output a partial line */
static void load_func( void **func, const char *name, void *def )
{
if (!*func)
{
DWORD err = GetLastError();
HMODULE module = GetModuleHandleA( "ntdll.dll" );
void *proc = GetProcAddress( module, name );
InterlockedExchangePointer( func, proc ? proc : def );
SetLastError( err );
}
}
#define LOAD_FUNC(name) load_func( (void **)&p ## name, #name, fallback ## name )
/* add a new debug option at the end of the option list */
static void add_option( const char *name, unsigned char set, unsigned char clear )
{
int min = 0, max = nb_debug_options - 1, pos, res;
if (!name[0]) /* "all" option */
{
default_flags = (default_flags & ~clear) | set;
return;
}
if (strlen(name) >= sizeof(debug_options[0].name)) return;
while (min <= max)
{
pos = (min + max) / 2;
res = strcmp( name, debug_options[pos].name );
if (!res)
{
debug_options[pos].flags = (debug_options[pos].flags & ~clear) | set;
return;
}
if (res < 0) max = pos - 1;
else min = pos + 1;
}
if (nb_debug_options >= options_size)
{
options_size = max( options_size * 2, 16 );
debug_options = heap_realloc( debug_options, options_size * sizeof(debug_options[0]) );
}
pos = min;
if (pos < nb_debug_options) memmove( &debug_options[pos + 1], &debug_options[pos],
(nb_debug_options - pos) * sizeof(debug_options[0]) );
strcpy( debug_options[pos].name, name );
debug_options[pos].flags = (default_flags & ~clear) | set;
nb_debug_options++;
}
/* parse a set of debugging option specifications and add them to the option list */
static void parse_options( const char *str )
{
char *opt, *next, *options;
unsigned int i;
if (!(options = _strdup(str))) return;
for (opt = options; opt; opt = next)
{
const char *p;
unsigned char set = 0, clear = 0;
if ((next = strchr( opt, ',' ))) *next++ = 0;
p = opt + strcspn( opt, "+-" );
if (!p[0]) p = opt; /* assume it's a debug channel name */
if (p > opt)
{
for (i = 0; i < ARRAY_SIZE(debug_classes); i++)
{
int len = strlen(debug_classes[i]);
if (len != (p - opt)) continue;
if (!memcmp( opt, debug_classes[i], len )) /* found it */
{
if (*p == '+') set |= 1 << i;
else clear |= 1 << i;
break;
}
}
if (i == ARRAY_SIZE(debug_classes)) /* bad class name, skip it */
continue;
}
else
{
if (*p == '-') clear = ~0;
else set = ~0;
}
if (*p == '+' || *p == '-') p++;
if (!p[0]) continue;
if (!strcmp( p, "all" ))
default_flags = (default_flags & ~clear) | set;
else
add_option( p, set, clear );
}
free( options );
}
/* initialize all options at startup */
static void init_options(void)
{
char *wine_debug = getenv("WINEDEBUG");
nb_debug_options = 0;
if (wine_debug) parse_options( wine_debug );
}
/* 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 = InterlockedIncrement( &pos ) % ARRAY_SIZE(list);
free( InterlockedExchangePointer( (void **)&list[idx], ret ));
return ret;
}
static int __cdecl fallback__wine_dbg_output( const char *str )
{
size_t len = strlen( str );
if (!len) return 0;
InterlockedExchange( (LONG *)&partial_line_tid, str[len - 1] != '\n' ? GetCurrentThreadId() : 0 );
return fwrite( str, 1, len, stderr );
}
static int __cdecl fallback__wine_dbg_header( enum __wine_debug_class cls,
struct __wine_debug_channel *channel,
const char *function )
{
char buffer[200], *pos = buffer;
if (!(__wine_dbg_get_channel_flags( channel ) & (1 << cls))) return -1;
/* skip header if partial line and no other thread came in between */
if (partial_line_tid == GetCurrentThreadId()) return 0;
if (TRACE_ON(timestamp))
{
ULONG ticks = GetTickCount();
pos += sprintf( pos, "%3u.%03u:", ticks / 1000, ticks % 1000 );
}
if (TRACE_ON(pid)) pos += sprintf( pos, "%04x:", GetCurrentProcessId() );
pos += sprintf( pos, "%04x:", GetCurrentThreadId() );
if (function && cls < ARRAY_SIZE( debug_classes ))
snprintf( pos, sizeof(buffer) - (pos - buffer), "%s:%s:%s ",
debug_classes[cls], channel->name, function );
return fwrite( buffer, 1, strlen(buffer), stderr );
}
static unsigned char __cdecl fallback__wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
{
int min, max, pos, res;
if (nb_debug_options == -1) init_options();
min = 0;
max = nb_debug_options - 1;
while (min <= max)
{
pos = (min + max) / 2;
res = strcmp( channel->name, debug_options[pos].name );
if (!res) return debug_options[pos].flags;
if (res < 0) max = pos - 1;
else min = pos + 1;
}
/* no option for this channel */
if (channel->flags & (1 << __WINE_DBCL_INIT)) channel->flags = default_flags;
return default_flags;
}
const char * __cdecl __wine_dbg_strdup( const char *str )
{
LOAD_FUNC( __wine_dbg_strdup );
return p__wine_dbg_strdup( str );
}
int __cdecl __wine_dbg_output( const char *str )
{
LOAD_FUNC( __wine_dbg_output );
return p__wine_dbg_output( str );
}
unsigned char __cdecl __wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
{
LOAD_FUNC( __wine_dbg_get_channel_flags );
return p__wine_dbg_get_channel_flags( channel );
}
int __cdecl __wine_dbg_header( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
const char *function )
{
LOAD_FUNC( __wine_dbg_header );
return p__wine_dbg_header( cls, channel, function );
}
#endif /* __WINE_PE_BUILD */