From 2e3c07378f9b777a708e1078a474666a00a8be05 Mon Sep 17 00:00:00 2001 From: Derrick Stolee Date: Wed, 27 Jun 2018 09:24:37 -0400 Subject: [PATCH] commit-graph: verify root tree OIDs The 'verify' subcommand must compare the commit content parsed from the commit-graph against the content in the object database. Use lookup_commit() and parse_commit_in_graph_one() to parse the commits from the graph and compare against a commit that is loaded separately and parsed directly from the object database. Add checks for the root tree OID. Signed-off-by: Derrick Stolee Signed-off-by: Junio C Hamano --- commit-graph.c | 17 ++++++++++++++++- t/t5318-commit-graph.sh | 7 +++++++ 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/commit-graph.c b/commit-graph.c index 282cdb4aec..17624b90d7 100644 --- a/commit-graph.c +++ b/commit-graph.c @@ -866,6 +866,8 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g) return verify_commit_graph_error; for (i = 0; i < g->num_commits; i++) { + struct commit *graph_commit; + hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); if (i && oidcmp(&prev_oid, &cur_oid) >= 0) @@ -883,6 +885,11 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g) cur_fanout_pos, fanout_value, i); cur_fanout_pos++; } + + graph_commit = lookup_commit(&cur_oid); + if (!parse_commit_in_graph_one(g, graph_commit)) + graph_report("failed to parse %s from commit-graph", + oid_to_hex(&cur_oid)); } while (cur_fanout_pos < 256) { @@ -899,16 +906,24 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g) return verify_commit_graph_error; for (i = 0; i < g->num_commits; i++) { - struct commit *odb_commit; + struct commit *graph_commit, *odb_commit; hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); + graph_commit = lookup_commit(&cur_oid); odb_commit = (struct commit *)create_object(r, cur_oid.hash, alloc_commit_node(r)); if (parse_commit_internal(odb_commit, 0, 0)) { graph_report("failed to parse %s from object database", oid_to_hex(&cur_oid)); continue; } + + if (oidcmp(&get_commit_tree_in_graph_one(g, graph_commit)->object.oid, + get_commit_tree_oid(odb_commit))) + graph_report("root tree OID for commit %s in commit-graph is %s != %s", + oid_to_hex(&cur_oid), + oid_to_hex(get_commit_tree_oid(graph_commit)), + oid_to_hex(get_commit_tree_oid(odb_commit))); } return verify_commit_graph_error; diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh index a27ec97269..f258c6d5d0 100755 --- a/t/t5318-commit-graph.sh +++ b/t/t5318-commit-graph.sh @@ -267,6 +267,8 @@ GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255)) 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 + $HASH_LEN * 4 + 10)) +GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS)) +GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET # usage: corrupt_graph_and_verify # Manipulates the commit-graph file at the position @@ -341,4 +343,9 @@ test_expect_success 'detect OID not in object database' ' "from object database" ' +test_expect_success 'detect incorrect tree OID' ' + corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \ + "root tree OID for commit" +' + test_done