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1 /* state.c -- Create the backtrace state.
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2 Copyright (C) 2012-2020 Free Software Foundation, Inc.
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3 Written by Ian Lance Taylor, Google.
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4
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5 Redistribution and use in source and binary forms, with or without
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6 modification, are permitted provided that the following conditions are
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7 met:
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8
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9 (1) Redistributions of source code must retain the above copyright
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10 notice, this list of conditions and the following disclaimer.
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11
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12 (2) Redistributions in binary form must reproduce the above copyright
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13 notice, this list of conditions and the following disclaimer in
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14 the documentation and/or other materials provided with the
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15 distribution.
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16
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17 (3) The name of the author may not be used to
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18 endorse or promote products derived from this software without
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19 specific prior written permission.
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20
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21 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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22 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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23 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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24 DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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25 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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26 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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27 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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28 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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29 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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30 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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31 POSSIBILITY OF SUCH DAMAGE. */
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32
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33 #include "config.h"
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34
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35 #include <string.h>
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36 #include <sys/types.h>
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37
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38 #include "backtrace.h"
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39 #include "backtrace-supported.h"
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40 #include "internal.h"
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41
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42 /* Create the backtrace state. This will then be passed to all the
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43 other routines. */
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44
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45 struct backtrace_state *
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46 backtrace_create_state (const char *filename, int threaded,
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47 backtrace_error_callback error_callback,
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48 void *data)
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49 {
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50 struct backtrace_state init_state;
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51 struct backtrace_state *state;
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52
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53 #ifndef HAVE_SYNC_FUNCTIONS
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54 if (threaded)
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55 {
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56 error_callback (data, "backtrace library does not support threads", 0);
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57 return NULL;
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58 }
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59 #endif
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60
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61 memset (&init_state, 0, sizeof init_state);
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62 init_state.filename = filename;
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63 init_state.threaded = threaded;
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64
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65 state = ((struct backtrace_state *)
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66 backtrace_alloc (&init_state, sizeof *state, error_callback, data));
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67 if (state == NULL)
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68 return NULL;
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69 *state = init_state;
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70
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71 return state;
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72 }
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