Function elf_try_debugfile

Dependencies/tracy/libbacktrace/elf.cpp:941–969

   DEBUGLINK_NAME.  Returns an open file descriptor, or -1.  */

static int
elf_try_debugfile (struct backtrace_state *state, const char *prefix,
		   size_t prefix_len, const char *prefix2, size_t prefix2_len,
		   const char *debuglink_name,
		   backtrace_error_callback error_callback, void *data)
{
  size_t debuglink_len;
  size_t try_len;
  char *Try;
  int does_not_exist;
  int ret;

  debuglink_len = strlen (debuglink_name);
  try_len = prefix_len + prefix2_len + debuglink_len + 1;
  Try = (char*)backtrace_alloc (state, try_len, error_callback, data);
  if (Try == NULL)
    return -1;

  memcpy (Try, prefix, prefix_len);
  memcpy (Try + prefix_len, prefix2, prefix2_len);
  memcpy (Try + prefix_len + prefix2_len, debuglink_name, debuglink_len);
  Try[prefix_len + prefix2_len + debuglink_len] = '\0';

  ret = backtrace_open (Try, error_callback, data, &does_not_exist);

  backtrace_free (state, Try, try_len, error_callback, data);

  return ret;
}

/* Find a separate debug info file, using the debuglink section data
   to find it.  Returns an open file descriptor, or -1.  */