2018-05-16 05:48:42 +08:00
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#ifndef ALLOC_H
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#define ALLOC_H
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2018-08-16 01:54:05 +08:00
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struct alloc_state;
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2018-05-16 05:48:42 +08:00
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struct tree;
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struct commit;
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struct tag;
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2018-08-16 01:54:05 +08:00
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struct repository;
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2018-05-16 05:48:42 +08:00
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void *alloc_blob_node(struct repository *r);
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void *alloc_tree_node(struct repository *r);
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object_as_type: initialize commit-graph-related fields of 'struct commit'
When the commit graph and generation numbers were introduced in
commits 177722b344 (commit: integrate commit graph with commit
parsing, 2018-04-10) and 83073cc994 (commit: add generation number to
struct commit, 2018-04-25), they tried to make sure that the
corresponding 'graph_pos' and 'generation' fields of 'struct commit'
are initialized conservatively, as if the commit were not included in
the commit-graph file.
Alas, initializing those fields only in alloc_commit_node() missed the
case when an object that happens to be a commit is first looked up via
lookup_unknown_object(), and is then later converted to a 'struct
commit' via the object_as_type() helper function (either calling it
directly, or as part of a subsequent lookup_commit() call).
Consequently, both of those fields incorrectly remain set to zero,
which means e.g. that the commit is present in and is the first entry
of the commit-graph file. This will result in wrong timestamp, parent
and root tree hashes, if such a 'struct commit' instance is later
filled from the commit-graph.
Extract the initialization of 'struct commit's fields from
alloc_commit_node() into a helper function, and call it from
object_as_type() as well, to make sure that it properly initializes
the two commit-graph-related fields, too. With this helper function
it is hopefully less likely that any new fields added to 'struct
commit' in the future would remain uninitialized.
With this change alloc_commit_index() won't have any remaining callers
outside of 'alloc.c', so mark it as static.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-27 21:08:32 +08:00
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void init_commit_node(struct repository *r, struct commit *c);
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2018-05-16 05:48:42 +08:00
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void *alloc_commit_node(struct repository *r);
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void *alloc_tag_node(struct repository *r);
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void *alloc_object_node(struct repository *r);
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void alloc_report(struct repository *r);
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2018-08-16 01:54:06 +08:00
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struct alloc_state *allocate_alloc_state(void);
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2018-05-16 05:48:42 +08:00
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void clear_alloc_state(struct alloc_state *s);
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#endif
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