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Diffstat (limited to 'tests/libgit2/index/racy.c')
| -rw-r--r-- | tests/libgit2/index/racy.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/tests/libgit2/index/racy.c b/tests/libgit2/index/racy.c new file mode 100644 index 000000000..07b3b73d4 --- /dev/null +++ b/tests/libgit2/index/racy.c @@ -0,0 +1,323 @@ +#include "clar_libgit2.h" +#include "../checkout/checkout_helpers.h" + +#include "index.h" +#include "repository.h" + +static git_repository *g_repo; + +void test_index_racy__initialize(void) +{ + cl_git_pass(git_repository_init(&g_repo, "diff_racy", false)); +} + +void test_index_racy__cleanup(void) +{ + git_repository_free(g_repo); + g_repo = NULL; + + cl_fixture_cleanup("diff_racy"); +} + +void test_index_racy__diff(void) +{ + git_index *index; + git_diff *diff; + git_str path = GIT_STR_INIT; + + cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "A")); + cl_git_mkfile(path.ptr, "A"); + + /* Put 'A' into the index */ + cl_git_pass(git_repository_index(&index, g_repo)); + cl_git_pass(git_index_add_bypath(index, "A")); + cl_git_pass(git_index_write(index)); + + cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL)); + cl_assert_equal_i(0, git_diff_num_deltas(diff)); + git_diff_free(diff); + + /* Change its contents quickly, so we get the same timestamp */ + cl_git_mkfile(path.ptr, "B"); + + cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL)); + cl_assert_equal_i(1, git_diff_num_deltas(diff)); + + git_index_free(index); + git_diff_free(diff); + git_str_dispose(&path); +} + +void test_index_racy__write_index_just_after_file(void) +{ + git_index *index; + git_diff *diff; + git_str path = GIT_STR_INIT; + struct p_timeval times[2]; + + /* Make sure we do have a timestamp */ + cl_git_pass(git_repository_index(&index, g_repo)); + cl_git_pass(git_index_write(index)); + + cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "A")); + cl_git_mkfile(path.ptr, "A"); + /* Force the file's timestamp to be a second after we wrote the index */ + times[0].tv_sec = index->stamp.mtime.tv_sec + 1; + times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000; + times[1].tv_sec = index->stamp.mtime.tv_sec + 1; + times[1].tv_usec = index->stamp.mtime.tv_nsec / 1000; + cl_git_pass(p_utimes(path.ptr, times)); + + /* + * Put 'A' into the index, the size field will be filled, + * because the index' on-disk timestamp does not match the + * file's timestamp. + */ + cl_git_pass(git_index_add_bypath(index, "A")); + cl_git_pass(git_index_write(index)); + + cl_git_mkfile(path.ptr, "B"); + /* + * Pretend this index' modification happened a second after the + * file update, and rewrite the file in that same second. + */ + times[0].tv_sec = index->stamp.mtime.tv_sec + 2; + times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000; + times[1].tv_sec = index->stamp.mtime.tv_sec + 2; + times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000; + + cl_git_pass(p_utimes(git_index_path(index), times)); + cl_git_pass(p_utimes(path.ptr, times)); + + cl_git_pass(git_index_read(index, true)); + + cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL)); + cl_assert_equal_i(1, git_diff_num_deltas(diff)); + + git_str_dispose(&path); + git_diff_free(diff); + git_index_free(index); +} + + +static void setup_race(void) +{ + git_str path = GIT_STR_INIT; + git_index *index; + git_index_entry *entry; + struct stat st; + + /* Make sure we do have a timestamp */ + cl_git_pass(git_repository_index__weakptr(&index, g_repo)); + cl_git_pass(git_index_write(index)); + + cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "A")); + + cl_git_mkfile(path.ptr, "A"); + cl_git_pass(git_index_add_bypath(index, "A")); + + cl_git_mkfile(path.ptr, "B"); + cl_git_pass(git_index_write(index)); + + cl_git_mkfile(path.ptr, ""); + + cl_git_pass(p_stat(path.ptr, &st)); + cl_assert(entry = (git_index_entry *)git_index_get_bypath(index, "A", 0)); + + /* force a race */ + entry->mtime.seconds = (int32_t)st.st_mtime; + entry->mtime.nanoseconds = (int32_t)st.st_mtime_nsec; + + git_str_dispose(&path); +} + +void test_index_racy__smudges_index_entry_on_save(void) +{ + git_index *index; + const git_index_entry *entry; + + setup_race(); + + /* write the index, which will smudge anything that had the same timestamp + * as the index when the index was loaded. that way future loads of the + * index (with the new timestamp) will know that these files were not + * clean. + */ + + cl_git_pass(git_repository_index__weakptr(&index, g_repo)); + cl_git_pass(git_index_write(index)); + + cl_assert(entry = git_index_get_bypath(index, "A", 0)); + cl_assert_equal_i(0, entry->file_size); +} + +void test_index_racy__detects_diff_of_change_in_identical_timestamp(void) +{ + git_index *index; + git_diff *diff; + + cl_git_pass(git_repository_index__weakptr(&index, g_repo)); + + setup_race(); + + cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL)); + cl_assert_equal_i(1, git_diff_num_deltas(diff)); + + git_diff_free(diff); +} + +static void setup_uptodate_files(void) +{ + git_str path = GIT_STR_INIT; + git_index *index; + const git_index_entry *a_entry; + git_index_entry new_entry = {{0}}; + + cl_git_pass(git_repository_index(&index, g_repo)); + + cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "A")); + cl_git_mkfile(path.ptr, "A"); + + /* Put 'A' into the index */ + cl_git_pass(git_index_add_bypath(index, "A")); + + cl_assert((a_entry = git_index_get_bypath(index, "A", 0))); + + /* Put 'B' into the index */ + new_entry.path = "B"; + new_entry.mode = GIT_FILEMODE_BLOB; + git_oid_cpy(&new_entry.id, &a_entry->id); + cl_git_pass(git_index_add(index, &new_entry)); + + /* Put 'C' into the index */ + new_entry.path = "C"; + new_entry.mode = GIT_FILEMODE_BLOB; + cl_git_pass(git_index_add_from_buffer(index, &new_entry, "hello!\n", 7)); + + git_index_free(index); + git_str_dispose(&path); +} + +void test_index_racy__adding_to_index_is_uptodate(void) +{ + git_index *index; + const git_index_entry *entry; + + setup_uptodate_files(); + + cl_git_pass(git_repository_index(&index, g_repo)); + + /* ensure that they're all uptodate */ + cl_assert((entry = git_index_get_bypath(index, "A", 0))); + cl_assert_equal_i(GIT_INDEX_ENTRY_UPTODATE, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_assert((entry = git_index_get_bypath(index, "B", 0))); + cl_assert_equal_i(GIT_INDEX_ENTRY_UPTODATE, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_assert((entry = git_index_get_bypath(index, "C", 0))); + cl_assert_equal_i(GIT_INDEX_ENTRY_UPTODATE, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_git_pass(git_index_write(index)); + + git_index_free(index); +} + +void test_index_racy__reading_clears_uptodate_bit(void) +{ + git_index *index; + const git_index_entry *entry; + + setup_uptodate_files(); + + cl_git_pass(git_repository_index(&index, g_repo)); + cl_git_pass(git_index_write(index)); + + cl_git_pass(git_index_read(index, true)); + + /* ensure that no files are uptodate */ + cl_assert((entry = git_index_get_bypath(index, "A", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_assert((entry = git_index_get_bypath(index, "B", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_assert((entry = git_index_get_bypath(index, "C", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + git_index_free(index); +} + +void test_index_racy__read_tree_clears_uptodate_bit(void) +{ + git_index *index; + git_tree *tree; + const git_index_entry *entry; + git_oid id; + + setup_uptodate_files(); + + cl_git_pass(git_repository_index(&index, g_repo)); + cl_git_pass(git_index_write_tree_to(&id, index, g_repo)); + cl_git_pass(git_tree_lookup(&tree, g_repo, &id)); + cl_git_pass(git_index_read_tree(index, tree)); + + /* ensure that no files are uptodate */ + cl_assert((entry = git_index_get_bypath(index, "A", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_assert((entry = git_index_get_bypath(index, "B", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_assert((entry = git_index_get_bypath(index, "C", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + git_tree_free(tree); + git_index_free(index); +} + +void test_index_racy__read_index_smudges(void) +{ + git_index *index, *newindex; + const git_index_entry *entry; + + /* if we are reading an index into our new index, ensure that any + * racy entries in the index that we're reading are smudged so that + * we don't propagate their timestamps without further investigation. + */ + setup_race(); + + cl_git_pass(git_repository_index(&index, g_repo)); + cl_git_pass(git_index_new(&newindex)); + cl_git_pass(git_index_read_index(newindex, index)); + + cl_assert(entry = git_index_get_bypath(newindex, "A", 0)); + cl_assert_equal_i(0, entry->file_size); + + git_index_free(index); + git_index_free(newindex); +} + +void test_index_racy__read_index_clears_uptodate_bit(void) +{ + git_index *index, *newindex; + const git_index_entry *entry; + + setup_uptodate_files(); + + cl_git_pass(git_repository_index(&index, g_repo)); + cl_git_pass(git_index_new(&newindex)); + cl_git_pass(git_index_read_index(newindex, index)); + + /* ensure that files brought in from the other index are not uptodate */ + cl_assert((entry = git_index_get_bypath(newindex, "A", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_assert((entry = git_index_get_bypath(newindex, "B", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + cl_assert((entry = git_index_get_bypath(newindex, "C", 0))); + cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); + + git_index_free(index); + git_index_free(newindex); +} |