/**

 * WinPR: Windows Portable Runtime

 * Debugging Utils

 *

 * Copyright 2014 Armin Novak <armin.novak@thincast.com>

 * Copyright 2014 Thincast Technologies GmbH

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <stdlib.h>

#include <fcntl.h>

#include <execinfo.h>

#include "debug.h"

typedef struct

{

  void** buffer;

  size_t max;

  size_t used;

} t_execinfo;

void winpr_execinfo_backtrace_free(void* buffer)

{

  t_execinfo* data = (t_execinfo*)buffer;

  if (!data)

    return;

  free(data->buffer);

  free(data);

}

void* winpr_execinfo_backtrace(DWORD size)

{

  t_execinfo* data = calloc(1, sizeof(t_execinfo));

  if (!data)

    return NULL;

  data->buffer = calloc(size, sizeof(void*));

  if (!data->buffer)

  {

    free(data);

    return NULL;

  }

  const int rc = backtrace(data->buffer, size);

  if (rc < 0)

  {

    free(data);

    return NULL;

  }

  data->max = size;

  data->used = (size_t)rc;

  return data;

}

char** winpr_execinfo_backtrace_symbols(void* buffer, size_t* used)

{

  t_execinfo* data = (t_execinfo*)buffer;

  if (used)

    *used = 0;

  if (!data)

    return NULL;

  if (used)

    *used = data->used;

  return backtrace_symbols(data->buffer, data->used);

}

void winpr_execinfo_backtrace_symbols_fd(void* buffer, int fd)

{

  t_execinfo* data = (t_execinfo*)buffer;

  if (!data)

    return;

  backtrace_symbols_fd(data->buffer, data->used, fd);

}