Re: [PATCH] target attributes [1/5] core and load from target function

[Yao Qi <yao at codesourcery dot com>]

On 08/29/2012 04:11 PM, Hui Zhu wrote:
> +static void
> +target_attribute_address_handler (struct gdb_xml_parser *parser,
> +				  const struct gdb_xml_element *element,
> +				  void *user_data,
> +				  VEC(gdb_xml_value_s) *attributes)
> +{
> +  int i, len;
> +  struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes);
> +  struct target_attribute *ta = *(struct target_attribute **)user_data;
> +  CORE_ADDR start, end;
> +  struct target_attribute_address *ta_addr;

I happen to see some compilation warnings on my new Fedora 16 box, while
these warnings don't appear on my Ubuntu box.

... -Werror -c -o target-memory.o -MT target-memory.o -MMD -MP -MF .deps/target-memory.Tpo ../../../git/gdb/target-memory.c
../../../git/gdb/target-attributes.c: In function ‘target_attribute_address_handler’:
../../../git/gdb/target-attributes.c:487:16: error: ‘end’ may be used uninitialized in this function [-Werror=uninitialized]
../../../git/gdb/target-attributes.c:486:18: error: ‘start’ may be used uninitialized in this function [-Werror=uninitialized]
../../../git/gdb/target-attributes.c: In function ‘target_attribute_attr_handler’:
../../../git/gdb/target-attributes.c:376:12: error: ‘type’ may be used uninitialized in this function [-Werror=uninitialized]
../../../git/gdb/target-attributes.c: In function ‘target_attribute_type’:
../../../git/gdb/target-attributes.c:632:3: error: ‘ret’ may be used uninitialized in this function [-Werror=uninitialized]
cc1: all warnings being treated as errors
make: *** [target-attributes.o] Error 1

The gcc I am using is 4.6.3
$ gcc --version
gcc (GCC) 4.6.3 20120306 (Red Hat 4.6.3-2)

We have to get these warnings fixed.

> +
> +  len = VEC_length (gdb_xml_value_s, attributes);
> +  for (i = 0; i < len; i++)
> +    {
> +      if (strcmp (attrs[i].name, "start") == 0)
> +        start = * (ULONGEST *) attrs[i].value;
> +      else if (strcmp (attrs[i].name, "end") == 0)
> +        end = * (ULONGEST *) attrs[i].value;
> +      else
> +        gdb_xml_error (parser, _("Unknown attribute name '%s'."),
> +		       attrs[i].name);
> +    }
> +
> +  ta_addr = xmalloc (sizeof (struct target_attribute_address));
> +  ta_addr->start = start;
> +  ta_addr->end = end;
> +
> +  ta_addr->prev = ta->addresses;
> +  ta->addresses = ta_addr;
> +}

-- 
Yao