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[PGPRO-5172] Fixed infinite looping in the receive_msg_by_parts function #25

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Merged
merged 1 commit into from
Jun 24, 2021
Merged

[PGPRO-5172] Fixed infinite looping in the receive_msg_by_parts function #25

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8 changes: 5 additions & 3 deletions pg_query_state.c
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Original file line number Diff line number Diff line change
Expand Up @@ -970,19 +970,21 @@ receive_msg_by_parts(shm_mq_handle *mqh, Size *total, void **datap,
shm_mq_result mq_receive_result;
shm_mq_msg *buff;
int offset;
int *expected;
int *expected;
int expected_data;
Size len;

/* Get the expected number of bytes in message */
mq_receive_result = shm_mq_receive(mqh, &len, (void **) &expected, nowait);
expected_data = *expected;
if (mq_receive_result != SHM_MQ_SUCCESS)
return mq_receive_result;
Assert(len == sizeof(int));

*datap = palloc0(*expected);
*datap = palloc0(expected_data);

/* Get the message itself */
for (offset = 0; offset < *expected; )
for (offset = 0; offset < expected_data; )
{
/* Keep receiving new messages until we assemble the full message */
mq_receive_result = shm_mq_receive(mqh, &len, ((void **) &buff), nowait);
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