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Fix crashes on sparc-32 bit: use memcpy when we need to access non-aligned

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pointers.
This commit is contained in:
Sergey Petrunya 2010-12-10 20:18:12 +03:00
parent a86599e1e4
commit 14ca046833
1 changed files with 16 additions and 8 deletions
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24
sql/multi_range_read.cc
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@ -359,9 +359,10 @@ int Mrr_ordered_index_reader::get_next(char **range_info)
kv_it.move_to_next_key_value();
continue;
}
if (!skip_index_tuple(*(char**)cur_range_info) &&
!skip_record(*(char**)cur_range_info, NULL))
char *range_info;
memcpy(&range_info, cur_range_info, sizeof(char*));
if (!skip_index_tuple(range_info) &&
!skip_record(range_info, NULL))
{
break;
}
@ -1051,17 +1052,24 @@ void DsMrr_impl::dsmrr_close()
my_qsort2-compatible static member function to compare key tuples
*/
int Mrr_ordered_index_reader::compare_keys(void* arg, uchar* key1, uchar* key2)
int Mrr_ordered_index_reader::compare_keys(void* arg, uchar* key1_arg,
uchar* key2_arg)
{
Mrr_ordered_index_reader *reader= (Mrr_ordered_index_reader*)arg;
TABLE *table= reader->file->get_table();
KEY_PART_INFO *part= table->key_info[reader->file->active_index].key_part;
uchar *key1, *key2;
if (reader->keypar.use_key_pointers)
{
/* the buffer stores pointers to keys, get to the keys */
key1= *((uchar**)key1);
key2= *((uchar**)key2); // todo is this alignment-safe?
memcpy(&key1, key1_arg, sizeof(char*));
memcpy(&key2, key2_arg, sizeof(char*));
}
else
{
key1= key1_arg;
key2= key2_arg;
}
return key_tuple_cmp(part, key1, key2, reader->keypar.key_tuple_length);
@ -1211,7 +1219,7 @@ int Key_value_records_iterator::init(Mrr_ordered_index_reader *owner_arg)
last_identical_key_ptr= cur_index_tuple;
if (owner->keypar.use_key_pointers)
cur_index_tuple= *((uchar**)cur_index_tuple);
memcpy(&cur_index_tuple, key_in_buf, sizeof(char*));
/* Check out how many more identical keys are following */
uchar *save_cur_index_tuple= cur_index_tuple;