github.com/axw/llgo@v0.0.0-20160805011314-95b5fe4dca20/third_party/gofrontend/libbacktrace/state.c (about)

     1  /* state.c -- Create the backtrace state.
     2     Copyright (C) 2012-2015 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  }