Function add_function_range

external/tracy/libbacktrace/dwarf.cpp:3485–3520

   add_ranges.  Returns 1 on success, 0 on error.  */

static int
add_function_range (struct backtrace_state *state, void *rdata,
		    uint64_t lowpc, uint64_t highpc,
		    backtrace_error_callback error_callback, void *data,
		    void *pvec)
{
  struct function *function = (struct function *) rdata;
  struct function_vector *vec = (struct function_vector *) pvec;
  struct function_addrs *p;

  if (vec->count > 0)
    {
      p = (struct function_addrs *) vec->vec.base + (vec->count - 1);
      if ((lowpc == p->high || lowpc == p->high + 1)
	  && function == p->function)
	{
	  if (highpc > p->high)
	    p->high = highpc;
	  return 1;
	}
    }

  p = ((struct function_addrs *)
       backtrace_vector_grow (state, sizeof (struct function_addrs),
			      error_callback, data, &vec->vec));
  if (p == NULL)
    return 0;

  p->low = lowpc;
  p->high = highpc;
  p->function = function;

  ++vec->count;

  return 1;
}

/* Read one entry plus all its children.  Add function addresses to
   VEC.  Returns 1 on success, 0 on error.  */