Do pg_probackup paranoia testing

Author: ololobus

Diff for: .travis.yml

@@ -23,4 +23,5 @@ env:
     - PG_VERSION=12 PG_BRANCH=REL_12_STABLE TEST_CASE=tap
     - PG_VERSION=12 PG_BRANCH=REL_12_STABLE TEST_CASE=tap MODE=legacy
     - PG_VERSION=12 PG_BRANCH=REL_12_STABLE TEST_CASE=all
-    - PG_VERSION=12 PG_BRANCH=REL_12_STABLE TEST_CASE=test_ptrack_multiple_segments TEST_REPEATS=5
+    - PG_VERSION=12 PG_BRANCH=REL_12_STABLE TEST_CASE=all MODE=paranoia
+    - PG_VERSION=12 PG_BRANCH=REL_12_STABLE TEST_CASE=test_ptrack_multiple_segments TEST_REPEATS=5 MODE=paranoia

Diff for: patches/turn-off-hint-bits.diff

@@ -0,0 +1,16 @@
+diff --git a/src/backend/access/heap/heapam_visibility.c b/src/backend/access/heap/heapam_visibility.c
+index 537e681b236..bd9f010f2ea 100644
+--- a/src/backend/access/heap/heapam_visibility.c
++++ b/src/backend/access/heap/heapam_visibility.c
+@@ -113,6 +113,11 @@ static inline void
+ SetHintBits(HeapTupleHeader tuple, Buffer buffer,
+ 			uint16 infomask, TransactionId xid)
+ {
++	/*
++	 * Turn off hint bits to test pg_probackup with PG_PROBACKUP_PARANOIA=ON,
++	 * i.e. doing per block checksums comparison.
++	 */
++	return;
+ 	if (TransactionIdIsValid(xid))
+ 	{
+ 		/* NB: xid must be known committed here! */

Diff for: run_tests.sh

@@ -33,6 +33,11 @@ cd postgres # Go to postgres dir
 echo "############### Applying ptrack patch"
 git apply -v -3 ../patches/$PG_BRANCH-ptrack-core.diff
 
+if [ "$MODE" = "paranoia" ]; then
+    echo "############### Paranoia mode: applying turn-off-hint-bits.diff"
+    git apply -v -3 ../patches/turn-off-hint-bits.diff
+fi
+
 echo "############### Compiling Postgres"
 if [ "$TEST_CASE" = "tap" ] && [ "$MODE" = "legacy" ]; then
     ./configure CFLAGS='-DEXEC_BACKEND' --disable-atomics --prefix=$PGHOME --enable-debug --enable-cassert --enable-depend --enable-tap-tests
@@ -97,6 +102,8 @@ else
     echo "############### Testing"
     if [ "$MODE" = "basic" ]; then
         export PG_PROBACKUP_TEST_BASIC=ON
+    elif [ "$MODE" = "paranoia" ]; then
+        export PG_PROBACKUP_PARANOIA=ON
     fi
 
     if [ "$TEST_CASE" = "all" ]; then