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git://source.winehq.org/git/wine.git
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195 lines
5.4 KiB
C
195 lines
5.4 KiB
C
/*
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* Debugging functions
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*
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* Copyright 2000 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <ctype.h>
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#include "wine/debug.h"
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#include "wine/exception.h"
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#include "wine/library.h"
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#include "wine/unicode.h"
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#include "winnt.h"
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#include "winternl.h"
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#include "ntdll_misc.h"
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WINE_DECLARE_DEBUG_CHANNEL(tid);
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static struct __wine_debug_functions default_funcs;
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/* ---------------------------------------------------------------------- */
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/* get the debug info pointer for the current thread */
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static inline struct debug_info *get_info(void)
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{
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return ntdll_get_thread_data()->debug_info;
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}
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/* allocate some tmp space for a string */
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static char *get_temp_buffer( size_t n )
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{
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struct debug_info *info = get_info();
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char *res = info->str_pos;
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if (res + n >= &info->strings[sizeof(info->strings)]) res = info->strings;
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info->str_pos = res + n;
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return res;
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}
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/* release extra space that we requested in gimme1() */
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static void release_temp_buffer( char *ptr, size_t size )
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{
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struct debug_info *info = get_info();
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info->str_pos = ptr + size;
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}
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/***********************************************************************
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* NTDLL_dbgstr_an
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*/
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static const char *NTDLL_dbgstr_an( const char *src, int n )
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{
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const char *res;
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struct debug_info *info = get_info();
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/* save current position to restore it on exception */
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char *old_pos = info->str_pos;
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__TRY
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{
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res = default_funcs.dbgstr_an( src, n );
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}
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__EXCEPT_PAGE_FAULT
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{
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release_temp_buffer( old_pos, 0 );
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return "(invalid)";
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}
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__ENDTRY
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return res;
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}
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/***********************************************************************
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* NTDLL_dbgstr_wn
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*/
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static const char *NTDLL_dbgstr_wn( const WCHAR *src, int n )
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{
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const char *res;
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struct debug_info *info = get_info();
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/* save current position to restore it on exception */
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char *old_pos = info->str_pos;
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__TRY
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{
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res = default_funcs.dbgstr_wn( src, n );
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}
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__EXCEPT_PAGE_FAULT
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{
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release_temp_buffer( old_pos, 0 );
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return "(invalid)";
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}
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__ENDTRY
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return res;
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}
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/***********************************************************************
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* NTDLL_dbg_vprintf
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*/
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static int NTDLL_dbg_vprintf( const char *format, va_list args )
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{
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struct debug_info *info = get_info();
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int end;
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int ret = vsnprintf( info->out_pos, sizeof(info->output) - (info->out_pos - info->output),
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format, args );
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/* make sure we didn't exceed the buffer length
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* the two checks are due to glibc changes in vsnprintfs return value
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* the buffer size can be exceeded in case of a missing \n in
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* debug output */
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if ((ret == -1) || (ret >= sizeof(info->output) - (info->out_pos - info->output)))
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{
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fprintf( stderr, "wine_dbg_vprintf: debugstr buffer overflow (contents: '%s')\n",
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info->output);
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info->out_pos = info->output;
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abort();
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}
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for (end = ret; end > 0; end--) if (info->out_pos[end - 1] == '\n') break;
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if (!end) info->out_pos += ret;
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else
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{
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char *pos = info->output;
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write( 2, pos, info->out_pos + end - pos );
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/* move beginning of next line to start of buffer */
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memmove( pos, info->out_pos + end, ret - end );
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info->out_pos = pos + ret - end;
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}
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return ret;
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}
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/***********************************************************************
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* NTDLL_dbg_vlog
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*/
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static int NTDLL_dbg_vlog( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
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const char *function, const char *format, va_list args )
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{
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static const char * const classes[] = { "fixme", "err", "warn", "trace" };
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struct debug_info *info = get_info();
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int ret = 0;
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/* only print header if we are at the beginning of the line */
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if (info->out_pos == info->output || info->out_pos[-1] == '\n')
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{
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if (TRACE_ON(tid))
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ret = wine_dbg_printf( "%04x:", GetCurrentThreadId() );
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if (cls < sizeof(classes)/sizeof(classes[0]))
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ret += wine_dbg_printf( "%s:%s:%s ", classes[cls], channel->name, function );
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}
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if (format)
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ret += NTDLL_dbg_vprintf( format, args );
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return ret;
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}
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static const struct __wine_debug_functions funcs =
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{
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get_temp_buffer,
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release_temp_buffer,
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NTDLL_dbgstr_an,
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NTDLL_dbgstr_wn,
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NTDLL_dbg_vprintf,
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NTDLL_dbg_vlog
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};
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/***********************************************************************
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* debug_init
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*/
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void debug_init(void)
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{
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__wine_dbg_set_functions( &funcs, &default_funcs, sizeof(funcs) );
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}
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