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From: Stefan Beller <sbeller@google.com>
To: git@vger.kernel.org
Cc: Stefan Beller <sbeller@google.com>, Junio C Hamano <gitster@pobox.com>
Subject: [PATCH 23/23] t/helper/test-repository: celebrate independence from the_repository
Date: Fri, 14 Dec 2018 16:09:42 -0800
Message-ID: <20181215000942.46033-24-sbeller@google.com> (raw)
In-Reply-To: <20181215000942.46033-1-sbeller@google.com>

dade47c06c (commit-graph: add repo arg to graph readers, 2018-07-11)
brought more independence from the_repository to the commit graph, however
it was not completely independent of the_repository, as the previous
patches show.

To ensure we're not accessing the_repository by accident, we'd ideally
assign NULL to the_repository to trigger a segfault on access.

We currently have a temporary hack in cache.h, which relies on
the_hash_algo (which is a short form of the_repository->hash_algo) to
be set, so we cannot do that. The next best thing is to set all fields of
the_repository to 0, so any accidental access is more likely to be found.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 cache.h                    |  2 ++
 t/helper/test-repository.c | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/cache.h b/cache.h
index 59c8a93046..8864d7ec15 100644
--- a/cache.h
+++ b/cache.h
@@ -1033,6 +1033,8 @@ static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 	 *
 	 * This will need to be extended or ripped out when we learn about
 	 * hashes of different sizes.
+	 *
+	 * When ripping this out, see TODO in test-repository.c.
 	 */
 	if (the_hash_algo->rawsz != 20)
 		BUG("hash size not yet supported by hashcmp");
diff --git a/t/helper/test-repository.c b/t/helper/test-repository.c
index 6a84a53efb..f7f8618445 100644
--- a/t/helper/test-repository.c
+++ b/t/helper/test-repository.c
@@ -17,6 +17,11 @@ static void test_parse_commit_in_graph(const char *gitdir, const char *worktree,
 
 	setup_git_env(gitdir);
 
+	memset(the_repository, 0, sizeof(*the_repository));
+
+	/* TODO: Needed for temporary hack in hashcmp, see 183a638b7da. */
+	repo_set_hash_algo(the_repository, GIT_HASH_SHA1);
+
 	if (repo_init(&r, gitdir, worktree))
 		die("Couldn't init repo");
 
@@ -43,6 +48,11 @@ static void test_get_commit_tree_in_graph(const char *gitdir,
 
 	setup_git_env(gitdir);
 
+	memset(the_repository, 0, sizeof(*the_repository));
+
+	/* TODO: Needed for temporary hack in hashcmp, see 183a638b7da. */
+	repo_set_hash_algo(the_repository, GIT_HASH_SHA1);
+
 	if (repo_init(&r, gitdir, worktree))
 		die("Couldn't init repo");
 
-- 
2.20.0.405.gbc1bbc6f85-goog


  parent reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-15  0:09 [PATCH 00/23] sb/more-repo-in-api Stefan Beller
2018-12-15  0:09 ` [PATCH 01/23] sha1_file: allow read_object to read objects in arbitrary repositories Stefan Beller
2018-12-15  0:09 ` [PATCH 02/23] packfile: allow has_packed_and_bad to handle " Stefan Beller
2018-12-15  0:09 ` [PATCH 03/23] object-store: allow read_object_file_extended to read from any repo Stefan Beller
2018-12-15  0:09 ` [PATCH 04/23] object-store: prepare read_object_file to deal with " Stefan Beller
2018-12-15  0:09 ` [PATCH 05/23] object-store: prepare has_{sha1, object}_file to handle " Stefan Beller
2018-12-15  0:09 ` [PATCH 06/23] object: parse_object to honor its repository argument Stefan Beller
2018-12-15  0:09 ` [PATCH 07/23] commit: allow parse_commit* to handle any repo Stefan Beller
2018-12-15  0:09 ` [PATCH 08/23] commit-reach.c: allow paint_down_to_common " Stefan Beller
2018-12-15  0:09 ` [PATCH 09/23] commit-reach.c: allow merge_bases_many " Stefan Beller
2018-12-15  0:09 ` [PATCH 10/23] commit-reach.c: allow remove_redundant " Stefan Beller
2018-12-15  0:09 ` [PATCH 11/23] commit-reach.c: allow get_merge_bases_many_0 " Stefan Beller
2018-12-15  0:09 ` [PATCH 12/23] commit-reach: prepare get_merge_bases " Stefan Beller
2018-12-15  0:09 ` [PATCH 13/23] commit-reach: prepare in_merge_bases[_many] " Stefan Beller
2018-12-15  0:09 ` [PATCH 14/23] commit: prepare get_commit_buffer " Stefan Beller
2018-12-15  0:09 ` [PATCH 15/23] commit: prepare repo_unuse_commit_buffer " Stefan Beller
2018-12-15  0:09 ` [PATCH 16/23] commit: prepare logmsg_reencode to handle arbitrary repositories Stefan Beller
2018-12-15  0:09 ` [PATCH 17/23] pretty: prepare format_commit_message " Stefan Beller
2018-12-15  0:09 ` [PATCH 18/23] submodule: use submodule repos for object lookup Stefan Beller
2018-12-15  0:09 ` [PATCH 19/23] submodule: don't add submodule as odb for push Stefan Beller
2018-12-15  0:09 ` [PATCH 20/23] commit-graph: convert remaining functions to handle any repo Stefan Beller
2018-12-15  0:09 ` [PATCH 21/23] commit: prepare free_commit_buffer and release_commit_memory for " Stefan Beller
2018-12-15  0:09 ` [PATCH 22/23] path.h: make REPO_GIT_PATH_FUNC repository agnostic Stefan Beller
2018-12-15  0:09 ` Stefan Beller [this message]
2018-12-26 18:42 ` [PATCH 00/23] sb/more-repo-in-api Junio C Hamano
2018-12-27 14:41 ` Derrick Stolee
  -- strict thread matches above, loose matches on Subject: below --
2018-11-14  0:12 [PATCHv3 00/23] Bring more repository handles into our code base Stefan Beller
2018-11-14  0:13 ` [PATCH 23/23] t/helper/test-repository: celebrate independence from the_repository Stefan Beller

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