1  /* state.c -- Create the backtrace state.
       2     Copyright (C) 2012-2023 Free Software Foundation, Inc.
       3     Written by Ian Lance Taylor, Google.
       4  
       5  Redistribution and use in source and binary forms, with or without
       6  modification, are permitted provided that the following conditions are
       7  met:
       8  
       9      (1) Redistributions of source code must retain the above copyright
      10      notice, this list of conditions and the following disclaimer.
      11  
      12      (2) Redistributions in binary form must reproduce the above copyright
      13      notice, this list of conditions and the following disclaimer in
      14      the documentation and/or other materials provided with the
      15      distribution.
      16  
      17      (3) The name of the author may not be used to
      18      endorse or promote products derived from this software without
      19      specific prior written permission.
      20  
      21  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      22  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
      23  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      24  DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
      25  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
      26  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
      27  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
      29  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
      30  IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
      31  POSSIBILITY OF SUCH DAMAGE.  */
      32  
      33  #include "config.h"
      34  
      35  #include <string.h>
      36  #include <sys/types.h>
      37  
      38  #include "backtrace.h"
      39  #include "backtrace-supported.h"
      40  #include "internal.h"
      41  
      42  /* Create the backtrace state.  This will then be passed to all the
      43     other routines.  */
      44  
      45  struct backtrace_state *
      46  backtrace_create_state (const char *filename, int threaded,
      47  			backtrace_error_callback error_callback,
      48  			void *data)
      49  {
      50    struct backtrace_state init_state;
      51    struct backtrace_state *state;
      52  
      53  #ifndef HAVE_SYNC_FUNCTIONS
      54    if (threaded)
      55      {
      56        error_callback (data, "backtrace library does not support threads", 0);
      57        return NULL;
      58      }
      59  #endif
      60  
      61    memset (&init_state, 0, sizeof init_state);
      62    init_state.filename = filename;
      63    init_state.threaded = threaded;
      64  
      65    state = ((struct backtrace_state *)
      66  	   backtrace_alloc (&init_state, sizeof *state, error_callback, data));
      67    if (state == NULL)
      68      return NULL;
      69    *state = init_state;
      70  
      71    return state;
      72  }