test_description='commit graph'
. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-chunk.sh
GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0
GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
+GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
+GRAPH_BYTE_COMMIT_GENERATION_LAST=$(($GRAPH_BYTE_COMMIT_GENERATION + $(($NUM_COMMITS - 1)) * $GRAPH_COMMIT_DATA_WIDTH))
GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
-GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
$GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
test_expect_success 'detect missing OID fanout chunk' '
corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
- "missing the OID Fanout chunk"
+ "commit-graph required OID fanout chunk missing or corrupted"
'
test_expect_success 'detect missing OID lookup chunk' '
corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
- "missing the OID Lookup chunk"
+ "commit-graph required OID lookup chunk missing or corrupted"
'
test_expect_success 'detect missing commit data chunk' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
- "missing the Commit Data chunk"
+ "commit-graph required commit data chunk missing or corrupted"
'
test_expect_success 'detect incorrect fanout' '
test_expect_success 'detect incorrect fanout final value' '
corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
- "fanout value"
+ "OID lookup chunk is the wrong size"
'
test_expect_success 'detect incorrect OID order' '
"generation for commit"
'
-test_expect_success 'detect incorrect generation number' '
- corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
- "commit-graph generation for commit"
-'
-
test_expect_success 'detect incorrect commit date' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
"commit date"
$GRAPH_CHUNK_LOOKUP_OFFSET
'
+test_expect_success 'detect mixed generation numbers (non-zero to zero)' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION_LAST "\0\0\0\0" \
+ "both zero and non-zero generations"
+'
+
+test_expect_success 'detect mixed generation numbers (zero to non-zero)' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\0\0\0\0" \
+ "both zero and non-zero generations"
+'
+
test_expect_success 'git fsck (checks commit-graph when config set to true)' '
git -C full fsck &&
corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
)
'
+corrupt_chunk () {
+ graph=full/.git/objects/info/commit-graph &&
+ test_when_finished "rm -rf $graph" &&
+ git -C full commit-graph write --reachable &&
+ corrupt_chunk_file $graph "$@"
+}
+
+check_corrupt_chunk () {
+ corrupt_chunk "$@" &&
+ git -C full -c core.commitGraph=false log >expect.out &&
+ git -C full -c core.commitGraph=true log >out 2>err &&
+ test_cmp expect.out out
+}
+
+test_expect_success 'reader notices too-small oid fanout chunk' '
+ # make it big enough that the graph file is plausible,
+ # otherwise we hit an earlier check
+ check_corrupt_chunk OIDF clear $(printf "000000%02x" $(test_seq 250)) &&
+ cat >expect.err <<-\EOF &&
+ error: commit-graph oid fanout chunk is wrong size
+ error: commit-graph required OID fanout chunk missing or corrupted
+ EOF
+ test_cmp expect.err err
+'
+
+test_expect_success 'reader notices fanout/lookup table mismatch' '
+ check_corrupt_chunk OIDF 1020 "FFFFFFFF" &&
+ cat >expect.err <<-\EOF &&
+ error: commit-graph OID lookup chunk is the wrong size
+ error: commit-graph required OID lookup chunk missing or corrupted
+ EOF
+ test_cmp expect.err err
+'
+
+test_expect_success 'reader notices out-of-bounds fanout' '
+ # Rather than try to corrupt a specific hash, we will just
+ # wreck them all. But we cannot just set them all to 0xFFFFFFFF or
+ # similar, as they are used for hi/lo starts in a binary search (so if
+ # they are identical, that indicates that the search should abort
+ # immediately). Instead, we will give them high values that differ by
+ # 2^24, ensuring that any that are used would cause an out-of-bounds
+ # read.
+ check_corrupt_chunk OIDF 0 $(printf "%02x000000" $(test_seq 0 254)) &&
+ cat >expect.err <<-\EOF &&
+ error: commit-graph fanout values out of order
+ error: commit-graph required OID fanout chunk missing or corrupted
+ EOF
+ test_cmp expect.err err
+'
+
+test_expect_success 'reader notices too-small commit data chunk' '
+ check_corrupt_chunk CDAT clear 00000000 &&
+ cat >expect.err <<-\EOF &&
+ error: commit-graph commit data chunk is wrong size
+ error: commit-graph required commit data chunk missing or corrupted
+ EOF
+ test_cmp expect.err err
+'
+
+test_expect_success 'reader notices out-of-bounds extra edge' '
+ check_corrupt_chunk EDGE clear &&
+ cat >expect.err <<-\EOF &&
+ error: commit-graph extra-edges pointer out of bounds
+ EOF
+ test_cmp expect.err err
+'
+
+test_expect_success 'reader notices too-small generations chunk' '
+ check_corrupt_chunk GDA2 clear 00000000 &&
+ cat >expect.err <<-\EOF &&
+ error: commit-graph generations chunk is wrong size
+ EOF
+ test_cmp expect.err err
+'
+
test_done
projects / thirdparty / git.git / blobdiff