cyb70289 commented on a change in pull request #11041:
URL: https://github.com/apache/arrow/pull/11041#discussion_r699783080
##########
File path: cpp/src/arrow/compute/exec/key_encode.cc
##########
@@ -427,11 +427,19 @@ void KeyEncoder::EncoderInteger::Decode(uint32_t
start_row, uint32_t num_rows,
row_base += offset_within_row;
uint8_t* col_base = col_prep.mutable_data(1);
switch (col_prep.metadata().fixed_length) {
- case 1:
+ case 1: {
for (uint32_t i = 0; i < num_rows; ++i) {
col_base[i] = row_base[i * row_size];
}
+ // For booleans, we pack 8 bytes at a time, and the buffer we're
+ // writing to here may not be fully initialized - so make sure a
+ // multiple of 8 bytes are initialized to avoid Valgrind errors. The
+ // temp buffer is sized to num_rows uint16_t values, so there's more
+ // than enough space here.
+ uint32_t remainder = 8 - (num_rows % 8);
Review comment:
Will it overflow the buffer if num_rows is multiplier of 8?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
