[thirdparty/git.git] / refs / debug.c


#include "refs-internal.h"
#include "trace.h"

static struct trace_key trace_refs = TRACE_KEY_INIT(REFS);

struct debug_ref_store {
	struct ref_store base;
	struct ref_store *refs;
};

extern struct ref_storage_be refs_be_debug;

struct ref_store *maybe_debug_wrap_ref_store(const char *gitdir, struct ref_store *store)
{
	struct debug_ref_store *res;
	struct ref_storage_be *be_copy;

	if (!trace_want(&trace_refs)) {
		return store;
	}
	res = xmalloc(sizeof(struct debug_ref_store));
	be_copy = xmalloc(sizeof(*be_copy));
	*be_copy = refs_be_debug;
	/* we never deallocate backends, so safe to copy the pointer. */
	be_copy->name = store->be->name;
	trace_printf_key(&trace_refs, "ref_store for %s\n", gitdir);
	res->refs = store;
	base_ref_store_init((struct ref_store *)res, store->repo, gitdir,
			    be_copy);
	return (struct ref_store *)res;
}

static int debug_init_db(struct ref_store *refs, struct strbuf *err)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)refs;
	int res = drefs->refs->be->init_db(drefs->refs, err);
	trace_printf_key(&trace_refs, "init_db: %d\n", res);
	return res;
}

static int debug_transaction_prepare(struct ref_store *refs,
				     struct ref_transaction *transaction,
				     struct strbuf *err)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)refs;
	int res;
	transaction->ref_store = drefs->refs;
	res = drefs->refs->be->transaction_prepare(drefs->refs, transaction,
						   err);
	trace_printf_key(&trace_refs, "transaction_prepare: %d \"%s\"\n", res,
			 err->buf);
	return res;
}

static void print_update(int i, const char *refname,
			 const struct object_id *old_oid,
			 const struct object_id *new_oid, unsigned int flags,
			 unsigned int type, const char *msg)
{
	char o[GIT_MAX_HEXSZ + 1] = "null";
	char n[GIT_MAX_HEXSZ + 1] = "null";
	if (old_oid)
		oid_to_hex_r(o, old_oid);
	if (new_oid)
		oid_to_hex_r(n, new_oid);

	type &= 0xf; /* see refs.h REF_* */
	flags &= REF_HAVE_NEW | REF_HAVE_OLD | REF_NO_DEREF |
		REF_FORCE_CREATE_REFLOG;
	trace_printf_key(&trace_refs, "%d: %s %s -> %s (F=0x%x, T=0x%x) \"%s\"\n", i, refname,
		o, n, flags, type, msg);
}

static void print_transaction(struct ref_transaction *transaction)
{
	int i;
	trace_printf_key(&trace_refs, "transaction {\n");
	for (i = 0; i < transaction->nr; i++) {
		struct ref_update *u = transaction->updates[i];
		print_update(i, u->refname, &u->old_oid, &u->new_oid, u->flags,
			     u->type, u->msg);
	}
	trace_printf_key(&trace_refs, "}\n");
}

static int debug_transaction_finish(struct ref_store *refs,
				    struct ref_transaction *transaction,
				    struct strbuf *err)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)refs;
	int res;
	transaction->ref_store = drefs->refs;
	res = drefs->refs->be->transaction_finish(drefs->refs, transaction,
						  err);
	print_transaction(transaction);
	trace_printf_key(&trace_refs, "finish: %d\n", res);
	return res;
}

static int debug_transaction_abort(struct ref_store *refs,
				   struct ref_transaction *transaction,
				   struct strbuf *err)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)refs;
	int res;
	transaction->ref_store = drefs->refs;
	res = drefs->refs->be->transaction_abort(drefs->refs, transaction, err);
	return res;
}

static int debug_initial_transaction_commit(struct ref_store *refs,
					    struct ref_transaction *transaction,
					    struct strbuf *err)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)refs;
	int res;
	transaction->ref_store = drefs->refs;
	res = drefs->refs->be->initial_transaction_commit(drefs->refs,
							  transaction, err);
	return res;
}

static int debug_pack_refs(struct ref_store *ref_store, unsigned int flags)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res = drefs->refs->be->pack_refs(drefs->refs, flags);
	trace_printf_key(&trace_refs, "pack_refs: %d\n", res);
	return res;
}

static int debug_create_symref(struct ref_store *ref_store,
			       const char *ref_name, const char *target,
			       const char *logmsg)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res = drefs->refs->be->create_symref(drefs->refs, ref_name, target,
						 logmsg);
	trace_printf_key(&trace_refs, "create_symref: %s -> %s \"%s\": %d\n", ref_name,
		target, logmsg, res);
	return res;
}

static int debug_delete_refs(struct ref_store *ref_store, const char *msg,
			     struct string_list *refnames, unsigned int flags)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res =
		drefs->refs->be->delete_refs(drefs->refs, msg, refnames, flags);
	int i;
	trace_printf_key(&trace_refs, "delete_refs {\n");
	for (i = 0; i < refnames->nr; i++)
		trace_printf_key(&trace_refs, "%s\n", refnames->items[i].string);
	trace_printf_key(&trace_refs, "}: %d\n", res);
	return res;
}

static int debug_rename_ref(struct ref_store *ref_store, const char *oldref,
			    const char *newref, const char *logmsg)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res = drefs->refs->be->rename_ref(drefs->refs, oldref, newref,
					      logmsg);
	trace_printf_key(&trace_refs, "rename_ref: %s -> %s \"%s\": %d\n", oldref, newref,
		logmsg, res);
	return res;
}

static int debug_copy_ref(struct ref_store *ref_store, const char *oldref,
			  const char *newref, const char *logmsg)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res =
		drefs->refs->be->copy_ref(drefs->refs, oldref, newref, logmsg);
	trace_printf_key(&trace_refs, "copy_ref: %s -> %s \"%s\": %d\n", oldref, newref,
		logmsg, res);
	return res;
}

struct debug_ref_iterator {
	struct ref_iterator base;
	struct ref_iterator *iter;
};

static int debug_ref_iterator_advance(struct ref_iterator *ref_iterator)
{
	struct debug_ref_iterator *diter =
		(struct debug_ref_iterator *)ref_iterator;
	int res = diter->iter->vtable->advance(diter->iter);
	if (res)
		trace_printf_key(&trace_refs, "iterator_advance: (%d)\n", res);
	else
		trace_printf_key(&trace_refs, "iterator_advance: %s (0)\n",
			diter->iter->refname);

	diter->base.ordered = diter->iter->ordered;
	diter->base.refname = diter->iter->refname;
	diter->base.oid = diter->iter->oid;
	diter->base.flags = diter->iter->flags;
	return res;
}

static int debug_ref_iterator_peel(struct ref_iterator *ref_iterator,
				   struct object_id *peeled)
{
	struct debug_ref_iterator *diter =
		(struct debug_ref_iterator *)ref_iterator;
	int res = diter->iter->vtable->peel(diter->iter, peeled);
	trace_printf_key(&trace_refs, "iterator_peel: %s: %d\n", diter->iter->refname, res);
	return res;
}

static int debug_ref_iterator_abort(struct ref_iterator *ref_iterator)
{
	struct debug_ref_iterator *diter =
		(struct debug_ref_iterator *)ref_iterator;
	int res = diter->iter->vtable->abort(diter->iter);
	trace_printf_key(&trace_refs, "iterator_abort: %d\n", res);
	return res;
}

static struct ref_iterator_vtable debug_ref_iterator_vtable = {
	.advance = debug_ref_iterator_advance,
	.peel = debug_ref_iterator_peel,
	.abort = debug_ref_iterator_abort,
};

static struct ref_iterator *
debug_ref_iterator_begin(struct ref_store *ref_store, const char *prefix,
			 unsigned int flags)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	struct ref_iterator *res =
		drefs->refs->be->iterator_begin(drefs->refs, prefix, flags);
	struct debug_ref_iterator *diter = xcalloc(1, sizeof(*diter));
	base_ref_iterator_init(&diter->base, &debug_ref_iterator_vtable, 1);
	diter->iter = res;
	trace_printf_key(&trace_refs, "ref_iterator_begin: \"%s\" (0x%x)\n",
			 prefix, flags);
	return &diter->base;
}

static int debug_read_raw_ref(struct ref_store *ref_store, const char *refname,
			      struct object_id *oid, struct strbuf *referent,
			      unsigned int *type, int *failure_errno)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res = 0;

	oidcpy(oid, null_oid());
	res = drefs->refs->be->read_raw_ref(drefs->refs, refname, oid, referent,
					    type, failure_errno);

	if (res == 0) {
		trace_printf_key(&trace_refs, "read_raw_ref: %s: %s (=> %s) type %x: %d\n",
			refname, oid_to_hex(oid), referent->buf, *type, res);
	} else {
		trace_printf_key(&trace_refs,
				 "read_raw_ref: %s: %d (errno %d)\n", refname,
				 res, *failure_errno);
	}
	return res;
}

static int debug_read_symbolic_ref(struct ref_store *ref_store, const char *refname,
				   struct strbuf *referent)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	struct ref_store *refs = drefs->refs;
	int res;

	res = refs->be->read_symbolic_ref(refs, refname, referent);
	if (!res)
		trace_printf_key(&trace_refs, "read_symbolic_ref: %s: (%s)\n",
				 refname, referent->buf);
	else
		trace_printf_key(&trace_refs,
				 "read_symbolic_ref: %s: %d\n", refname, res);
	return res;

}

static struct ref_iterator *
debug_reflog_iterator_begin(struct ref_store *ref_store)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	struct ref_iterator *res =
		drefs->refs->be->reflog_iterator_begin(drefs->refs);
	trace_printf_key(&trace_refs, "for_each_reflog_iterator_begin\n");
	return res;
}

struct debug_reflog {
	const char *refname;
	each_reflog_ent_fn *fn;
	void *cb_data;
};

static int debug_print_reflog_ent(struct object_id *old_oid,
				  struct object_id *new_oid,
				  const char *committer, timestamp_t timestamp,
				  int tz, const char *msg, void *cb_data)
{
	struct debug_reflog *dbg = (struct debug_reflog *)cb_data;
	int ret;
	char o[GIT_MAX_HEXSZ + 1] = "null";
	char n[GIT_MAX_HEXSZ + 1] = "null";
	char *msgend = strchrnul(msg, '\n');
	if (old_oid)
		oid_to_hex_r(o, old_oid);
	if (new_oid)
		oid_to_hex_r(n, new_oid);

	ret = dbg->fn(old_oid, new_oid, committer, timestamp, tz, msg,
		      dbg->cb_data);
	trace_printf_key(&trace_refs,
			 "reflog_ent %s (ret %d): %s -> %s, %s %ld \"%.*s\"\n",
			 dbg->refname, ret, o, n, committer,
			 (long int)timestamp, (int)(msgend - msg), msg);
	return ret;
}

static int debug_for_each_reflog_ent(struct ref_store *ref_store,
				     const char *refname, each_reflog_ent_fn fn,
				     void *cb_data)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	struct debug_reflog dbg = {
		.refname = refname,
		.fn = fn,
		.cb_data = cb_data,
	};

	int res = drefs->refs->be->for_each_reflog_ent(
		drefs->refs, refname, &debug_print_reflog_ent, &dbg);
	trace_printf_key(&trace_refs, "for_each_reflog: %s: %d\n", refname, res);
	return res;
}

static int debug_for_each_reflog_ent_reverse(struct ref_store *ref_store,
					     const char *refname,
					     each_reflog_ent_fn fn,
					     void *cb_data)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	struct debug_reflog dbg = {
		.refname = refname,
		.fn = fn,
		.cb_data = cb_data,
	};
	int res = drefs->refs->be->for_each_reflog_ent_reverse(
		drefs->refs, refname, &debug_print_reflog_ent, &dbg);
	trace_printf_key(&trace_refs, "for_each_reflog_reverse: %s: %d\n", refname, res);
	return res;
}

static int debug_reflog_exists(struct ref_store *ref_store, const char *refname)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res = drefs->refs->be->reflog_exists(drefs->refs, refname);
	trace_printf_key(&trace_refs, "reflog_exists: %s: %d\n", refname, res);
	return res;
}

static int debug_create_reflog(struct ref_store *ref_store, const char *refname,
			       struct strbuf *err)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res = drefs->refs->be->create_reflog(drefs->refs, refname, err);
	trace_printf_key(&trace_refs, "create_reflog: %s: %d\n", refname, res);
	return res;
}

static int debug_delete_reflog(struct ref_store *ref_store, const char *refname)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	int res = drefs->refs->be->delete_reflog(drefs->refs, refname);
	trace_printf_key(&trace_refs, "delete_reflog: %s: %d\n", refname, res);
	return res;
}

struct debug_reflog_expiry_should_prune {
	reflog_expiry_prepare_fn *prepare;
	reflog_expiry_should_prune_fn *should_prune;
	reflog_expiry_cleanup_fn *cleanup;
	void *cb_data;
};

static void debug_reflog_expiry_prepare(const char *refname,
					const struct object_id *oid,
					void *cb_data)
{
	struct debug_reflog_expiry_should_prune *prune = cb_data;
	trace_printf_key(&trace_refs, "reflog_expire_prepare: %s\n", refname);
	prune->prepare(refname, oid, prune->cb_data);
}

static int debug_reflog_expiry_should_prune_fn(struct object_id *ooid,
					       struct object_id *noid,
					       const char *email,
					       timestamp_t timestamp, int tz,
					       const char *message, void *cb_data) {
	struct debug_reflog_expiry_should_prune *prune = cb_data;

	int result = prune->should_prune(ooid, noid, email, timestamp, tz, message, prune->cb_data);
	trace_printf_key(&trace_refs, "reflog_expire_should_prune: %s %ld: %d\n", message, (long int) timestamp, result);
	return result;
}

static void debug_reflog_expiry_cleanup(void *cb_data)
{
	struct debug_reflog_expiry_should_prune *prune = cb_data;
	prune->cleanup(prune->cb_data);
}

static int debug_reflog_expire(struct ref_store *ref_store, const char *refname,
			       unsigned int flags,
			       reflog_expiry_prepare_fn prepare_fn,
			       reflog_expiry_should_prune_fn should_prune_fn,
			       reflog_expiry_cleanup_fn cleanup_fn,
			       void *policy_cb_data)
{
	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
	struct debug_reflog_expiry_should_prune prune = {
		.prepare = prepare_fn,
		.cleanup = cleanup_fn,
		.should_prune = should_prune_fn,
		.cb_data = policy_cb_data,
	};
	int res = drefs->refs->be->reflog_expire(drefs->refs, refname,
						 flags, &debug_reflog_expiry_prepare,
						 &debug_reflog_expiry_should_prune_fn,
						 &debug_reflog_expiry_cleanup,
						 &prune);
	trace_printf_key(&trace_refs, "reflog_expire: %s: %d\n", refname, res);
	return res;
}

struct ref_storage_be refs_be_debug = {
	.next = NULL,
	.name = "debug",
	.init = NULL,
	.init_db = debug_init_db,

	/*
	 * None of these should be NULL. If the "files" backend (in
	 * "struct ref_storage_be refs_be_files" in files-backend.c)
	 * has a function we should also have a wrapper for it here.
	 * Test the output with "GIT_TRACE_REFS=1".
	 */
	.transaction_prepare = debug_transaction_prepare,
	.transaction_finish = debug_transaction_finish,
	.transaction_abort = debug_transaction_abort,
	.initial_transaction_commit = debug_initial_transaction_commit,

	.pack_refs = debug_pack_refs,
	.create_symref = debug_create_symref,
	.delete_refs = debug_delete_refs,
	.rename_ref = debug_rename_ref,
	.copy_ref = debug_copy_ref,

	.iterator_begin = debug_ref_iterator_begin,
	.read_raw_ref = debug_read_raw_ref,
	.read_symbolic_ref = debug_read_symbolic_ref,

	.reflog_iterator_begin = debug_reflog_iterator_begin,
	.for_each_reflog_ent = debug_for_each_reflog_ent,
	.for_each_reflog_ent_reverse = debug_for_each_reflog_ent_reverse,
	.reflog_exists = debug_reflog_exists,
	.create_reflog = debug_create_reflog,
	.delete_reflog = debug_delete_reflog,
	.reflog_expire = debug_reflog_expire,
};
Commit	Line	Data
4441f427 HWN	1
	2	#include "refs-internal.h"
	3	#include "trace.h"
	4
	5	static struct trace_key trace_refs = TRACE_KEY_INIT(REFS);
	6
	7	struct debug_ref_store {
	8	struct ref_store base;
	9	struct ref_store *refs;
	10	};
	11
	12	extern struct ref_storage_be refs_be_debug;
	13
	14	struct ref_store maybe_debug_wrap_ref_store(const char gitdir, struct ref_store *store)
	15	{
	16	struct debug_ref_store *res;
	17	struct ref_storage_be *be_copy;
	18
	19	if (!trace_want(&trace_refs)) {
	20	return store;
	21	}
	22	res = xmalloc(sizeof(struct debug_ref_store));
	23	be_copy = xmalloc(sizeof(*be_copy));
	24	*be_copy = refs_be_debug;
	25	/* we never deallocate backends, so safe to copy the pointer. */
	26	be_copy->name = store->be->name;
	27	trace_printf_key(&trace_refs, "ref_store for %s\n", gitdir);
	28	res->refs = store;
f9f7fd3b HWN	29	base_ref_store_init((struct ref_store *)res, store->repo, gitdir,
f9f7fd3b HWN	30	be_copy);
4441f427 HWN	31	return (struct ref_store *)res;
	32	}
	33
	34	static int debug_init_db(struct ref_store refs, struct strbuf err)
	35	{
	36	struct debug_ref_store drefs = (struct debug_ref_store )refs;
	37	int res = drefs->refs->be->init_db(drefs->refs, err);
	38	trace_printf_key(&trace_refs, "init_db: %d\n", res);
	39	return res;
	40	}
	41
	42	static int debug_transaction_prepare(struct ref_store *refs,
	43	struct ref_transaction *transaction,
	44	struct strbuf *err)
	45	{
	46	struct debug_ref_store drefs = (struct debug_ref_store )refs;
	47	int res;
	48	transaction->ref_store = drefs->refs;
	49	res = drefs->refs->be->transaction_prepare(drefs->refs, transaction,
	50	err);
a6db572a HWN	51	trace_printf_key(&trace_refs, "transaction_prepare: %d \"%s\"\n", res,
a6db572a HWN	52	err->buf);
4441f427 HWN	53	return res;
	54	}
	55
	56	static void print_update(int i, const char *refname,
	57	const struct object_id *old_oid,
	58	const struct object_id *new_oid, unsigned int flags,
	59	unsigned int type, const char *msg)
	60	{
	61	char o[GIT_MAX_HEXSZ + 1] = "null";
	62	char n[GIT_MAX_HEXSZ + 1] = "null";
	63	if (old_oid)
	64	oid_to_hex_r(o, old_oid);
	65	if (new_oid)
	66	oid_to_hex_r(n, new_oid);
	67
	68	type &= 0xf; /* see refs.h REF_* */
	69	flags &= REF_HAVE_NEW \| REF_HAVE_OLD \| REF_NO_DEREF \|
	70	REF_FORCE_CREATE_REFLOG;
	71	trace_printf_key(&trace_refs, "%d: %s %s -> %s (F=0x%x, T=0x%x) \"%s\"\n", i, refname,
	72	o, n, flags, type, msg);
	73	}
	74
	75	static void print_transaction(struct ref_transaction *transaction)
	76	{
	77	int i;
	78	trace_printf_key(&trace_refs, "transaction {\n");
	79	for (i = 0; i < transaction->nr; i++) {
	80	struct ref_update *u = transaction->updates[i];
	81	print_update(i, u->refname, &u->old_oid, &u->new_oid, u->flags,
	82	u->type, u->msg);
	83	}
	84	trace_printf_key(&trace_refs, "}\n");
	85	}
	86
	87	static int debug_transaction_finish(struct ref_store *refs,
	88	struct ref_transaction *transaction,
	89	struct strbuf *err)
	90	{
	91	struct debug_ref_store drefs = (struct debug_ref_store )refs;
	92	int res;
	93	transaction->ref_store = drefs->refs;
	94	res = drefs->refs->be->transaction_finish(drefs->refs, transaction,
	95	err);
	96	print_transaction(transaction);
	97	trace_printf_key(&trace_refs, "finish: %d\n", res);
	98	return res;
	99	}
	100
	101	static int debug_transaction_abort(struct ref_store *refs,
	102	struct ref_transaction *transaction,
	103	struct strbuf *err)
	104	{
	105	struct debug_ref_store drefs = (struct debug_ref_store )refs;
	106	int res;
	107	transaction->ref_store = drefs->refs;
	108	res = drefs->refs->be->transaction_abort(drefs->refs, transaction, err);
	109	return res;
	110	}
	111
	112	static int debug_initial_transaction_commit(struct ref_store *refs,
	113	struct ref_transaction *transaction,
	114	struct strbuf *err)
	115	{
	116	struct debug_ref_store drefs = (struct debug_ref_store )refs;
117	int res;
118	transaction->ref_store = drefs->refs;
119	res = drefs->refs->be->initial_transaction_commit(drefs->refs,
120	transaction, err);
121	return res;
122	}
123
124	static int debug_pack_refs(struct ref_store *ref_store, unsigned int flags)
125	{
126	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
127	int res = drefs->refs->be->pack_refs(drefs->refs, flags);
128	trace_printf_key(&trace_refs, "pack_refs: %d\n", res);
129	return res;
130	}
131
132	static int debug_create_symref(struct ref_store *ref_store,
133	const char ref_name, const char target,
134	const char *logmsg)
135	{
136	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
137	int res = drefs->refs->be->create_symref(drefs->refs, ref_name, target,
138	logmsg);
139	trace_printf_key(&trace_refs, "create_symref: %s -> %s \"%s\": %d\n", ref_name,
140	target, logmsg, res);
141	return res;
142	}
143
144	static int debug_delete_refs(struct ref_store ref_store, const char msg,
145	struct string_list *refnames, unsigned int flags)
146	{
147	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
148	int res =
149	drefs->refs->be->delete_refs(drefs->refs, msg, refnames, flags);
150	int i;
151	trace_printf_key(&trace_refs, "delete_refs {\n");
152	for (i = 0; i < refnames->nr; i++)
153	trace_printf_key(&trace_refs, "%s\n", refnames->items[i].string);
154	trace_printf_key(&trace_refs, "}: %d\n", res);
155	return res;
156	}
157
158	static int debug_rename_ref(struct ref_store ref_store, const char oldref,
159	const char newref, const char logmsg)
160	{
161	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
162	int res = drefs->refs->be->rename_ref(drefs->refs, oldref, newref,
163	logmsg);
164	trace_printf_key(&trace_refs, "rename_ref: %s -> %s \"%s\": %d\n", oldref, newref,
165	logmsg, res);
166	return res;
167	}
168
169	static int debug_copy_ref(struct ref_store ref_store, const char oldref,
170	const char newref, const char logmsg)
171	{
172	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
173	int res =
174	drefs->refs->be->copy_ref(drefs->refs, oldref, newref, logmsg);
175	trace_printf_key(&trace_refs, "copy_ref: %s -> %s \"%s\": %d\n", oldref, newref,
176	logmsg, res);
177	return res;
178	}
179
180	struct debug_ref_iterator {
181	struct ref_iterator base;
182	struct ref_iterator *iter;
183	};
184
185	static int debug_ref_iterator_advance(struct ref_iterator *ref_iterator)
186	{
187	struct debug_ref_iterator *diter =
188	(struct debug_ref_iterator *)ref_iterator;
189	int res = diter->iter->vtable->advance(diter->iter);
190	if (res)
191	trace_printf_key(&trace_refs, "iterator_advance: (%d)\n", res);
192	else
193	trace_printf_key(&trace_refs, "iterator_advance: %s (0)\n",
194	diter->iter->refname);
195
196	diter->base.ordered = diter->iter->ordered;
197	diter->base.refname = diter->iter->refname;
198	diter->base.oid = diter->iter->oid;
199	diter->base.flags = diter->iter->flags;
200	return res;
201	}
202
203	static int debug_ref_iterator_peel(struct ref_iterator *ref_iterator,
204	struct object_id *peeled)
205	{
206	struct debug_ref_iterator *diter =
207	(struct debug_ref_iterator *)ref_iterator;
208	int res = diter->iter->vtable->peel(diter->iter, peeled);
209	trace_printf_key(&trace_refs, "iterator_peel: %s: %d\n", diter->iter->refname, res);
210	return res;
211	}
212
213	static int debug_ref_iterator_abort(struct ref_iterator *ref_iterator)
214	{
215	struct debug_ref_iterator *diter =
216	(struct debug_ref_iterator *)ref_iterator;
217	int res = diter->iter->vtable->abort(diter->iter);
218	trace_printf_key(&trace_refs, "iterator_abort: %d\n", res);
219	return res;
220	}
221
222	static struct ref_iterator_vtable debug_ref_iterator_vtable = {
e2f8acb6 ÆAB	223	.advance = debug_ref_iterator_advance,
	224	.peel = debug_ref_iterator_peel,
	225	.abort = debug_ref_iterator_abort,
4441f427 HWN	226	};
	227
	228	static struct ref_iterator *
	229	debug_ref_iterator_begin(struct ref_store ref_store, const char prefix,
	230	unsigned int flags)
	231	{
	232	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
	233	struct ref_iterator *res =
	234	drefs->refs->be->iterator_begin(drefs->refs, prefix, flags);
	235	struct debug_ref_iterator diter = xcalloc(1, sizeof(diter));
	236	base_ref_iterator_init(&diter->base, &debug_ref_iterator_vtable, 1);
	237	diter->iter = res;
c510928a HWN	238	trace_printf_key(&trace_refs, "ref_iterator_begin: \"%s\" (0x%x)\n",
c510928a HWN	239	prefix, flags);
4441f427 HWN	240	return &diter->base;
	241	}
	242
	243	static int debug_read_raw_ref(struct ref_store ref_store, const char refname,
	244	struct object_id oid, struct strbuf referent,
5b12e16b	245	unsigned int type, int failure_errno)
4441f427 HWN	246	{
	247	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
	248	int res = 0;
	249
14228447	250	oidcpy(oid, null_oid());
4441f427	251	res = drefs->refs->be->read_raw_ref(drefs->refs, refname, oid, referent,
5b12e16b	252	type, failure_errno);
4441f427 HWN	253
	254	if (res == 0) {
	255	trace_printf_key(&trace_refs, "read_raw_ref: %s: %s (=> %s) type %x: %d\n",
	256	refname, oid_to_hex(oid), referent->buf, *type, res);
	257	} else {
2a2112a4 HWN	258	trace_printf_key(&trace_refs,
2a2112a4 HWN	259	"read_raw_ref: %s: %d (errno %d)\n", refname,
5b12e16b	260	res, *failure_errno);
4441f427 HWN	261	}
	262	return res;
	263	}
	264
5b875404 ÆAB	265	static int debug_read_symbolic_ref(struct ref_store ref_store, const char refname,
	266	struct strbuf *referent)
	267	{
	268	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
	269	struct ref_store *refs = drefs->refs;
	270	int res;
	271
	272	res = refs->be->read_symbolic_ref(refs, refname, referent);
	273	if (!res)
	274	trace_printf_key(&trace_refs, "read_symbolic_ref: %s: (%s)\n",
	275	refname, referent->buf);
	276	else
	277	trace_printf_key(&trace_refs,
	278	"read_symbolic_ref: %s: %d\n", refname, res);
	279	return res;
	280
	281	}
	282
4441f427 HWN	283	static struct ref_iterator *
	284	debug_reflog_iterator_begin(struct ref_store *ref_store)
	285	{
	286	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
	287	struct ref_iterator *res =
	288	drefs->refs->be->reflog_iterator_begin(drefs->refs);
	289	trace_printf_key(&trace_refs, "for_each_reflog_iterator_begin\n");
	290	return res;
	291	}
	292
	293	struct debug_reflog {
	294	const char *refname;
	295	each_reflog_ent_fn *fn;
	296	void *cb_data;
	297	};
	298
	299	static int debug_print_reflog_ent(struct object_id *old_oid,
	300	struct object_id *new_oid,
	301	const char *committer, timestamp_t timestamp,
	302	int tz, const char msg, void cb_data)
	303	{
	304	struct debug_reflog dbg = (struct debug_reflog )cb_data;
	305	int ret;
	306	char o[GIT_MAX_HEXSZ + 1] = "null";
	307	char n[GIT_MAX_HEXSZ + 1] = "null";
65279256	308	char *msgend = strchrnul(msg, '\n');
4441f427 HWN	309	if (old_oid)
	310	oid_to_hex_r(o, old_oid);
	311	if (new_oid)
	312	oid_to_hex_r(n, new_oid);
	313
	314	ret = dbg->fn(old_oid, new_oid, committer, timestamp, tz, msg,
	315	dbg->cb_data);
65279256 HWN	316	trace_printf_key(&trace_refs,
	317	"reflog_ent %s (ret %d): %s -> %s, %s %ld \"%.*s\"\n",
	318	dbg->refname, ret, o, n, committer,
	319	(long int)timestamp, (int)(msgend - msg), msg);
4441f427 HWN	320	return ret;
	321	}
	322
	323	static int debug_for_each_reflog_ent(struct ref_store *ref_store,
	324	const char *refname, each_reflog_ent_fn fn,
	325	void *cb_data)
	326	{
	327	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
	328	struct debug_reflog dbg = {
	329	.refname = refname,
	330	.fn = fn,
	331	.cb_data = cb_data,
	332	};
	333
	334	int res = drefs->refs->be->for_each_reflog_ent(
	335	drefs->refs, refname, &debug_print_reflog_ent, &dbg);
	336	trace_printf_key(&trace_refs, "for_each_reflog: %s: %d\n", refname, res);
	337	return res;
	338	}
	339
	340	static int debug_for_each_reflog_ent_reverse(struct ref_store *ref_store,
	341	const char *refname,
	342	each_reflog_ent_fn fn,
	343	void *cb_data)
	344	{
	345	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
	346	struct debug_reflog dbg = {
	347	.refname = refname,
	348	.fn = fn,
	349	.cb_data = cb_data,
	350	};
	351	int res = drefs->refs->be->for_each_reflog_ent_reverse(
	352	drefs->refs, refname, &debug_print_reflog_ent, &dbg);
	353	trace_printf_key(&trace_refs, "for_each_reflog_reverse: %s: %d\n", refname, res);
	354	return res;
	355	}
	356
	357	static int debug_reflog_exists(struct ref_store ref_store, const char refname)
	358	{
	359	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
	360	int res = drefs->refs->be->reflog_exists(drefs->refs, refname);
	361	trace_printf_key(&trace_refs, "reflog_exists: %s: %d\n", refname, res);
	362	return res;
	363	}
	364
	365	static int debug_create_reflog(struct ref_store ref_store, const char refname,
7b089120	366	struct strbuf *err)
4441f427 HWN	367	{
4441f427 HWN	368	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
7b089120	369	int res = drefs->refs->be->create_reflog(drefs->refs, refname, err);
4441f427 HWN	370	trace_printf_key(&trace_refs, "create_reflog: %s: %d\n", refname, res);
	371	return res;
	372	}
	373
	374	static int debug_delete_reflog(struct ref_store ref_store, const char refname)
	375	{
	376	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
	377	int res = drefs->refs->be->delete_reflog(drefs->refs, refname);
	378	trace_printf_key(&trace_refs, "delete_reflog: %s: %d\n", refname, res);
	379	return res;
	380	}
	381
34c31997 HWN	382	struct debug_reflog_expiry_should_prune {
	383	reflog_expiry_prepare_fn *prepare;
	384	reflog_expiry_should_prune_fn *should_prune;
	385	reflog_expiry_cleanup_fn *cleanup;
	386	void *cb_data;
	387	};
	388
	389	static void debug_reflog_expiry_prepare(const char *refname,
81bc1225 ÆAB	390	const struct object_id *oid,
81bc1225 ÆAB	391	void *cb_data)
34c31997 HWN	392	{
	393	struct debug_reflog_expiry_should_prune *prune = cb_data;
	394	trace_printf_key(&trace_refs, "reflog_expire_prepare: %s\n", refname);
	395	prune->prepare(refname, oid, prune->cb_data);
	396	}
	397
	398	static int debug_reflog_expiry_should_prune_fn(struct object_id *ooid,
	399	struct object_id *noid,
	400	const char *email,
	401	timestamp_t timestamp, int tz,
	402	const char message, void cb_data) {
	403	struct debug_reflog_expiry_should_prune *prune = cb_data;
	404
	405	int result = prune->should_prune(ooid, noid, email, timestamp, tz, message, prune->cb_data);
	406	trace_printf_key(&trace_refs, "reflog_expire_should_prune: %s %ld: %d\n", message, (long int) timestamp, result);
	407	return result;
	408	}
	409
	410	static void debug_reflog_expiry_cleanup(void *cb_data)
	411	{
	412	struct debug_reflog_expiry_should_prune *prune = cb_data;
	413	prune->cleanup(prune->cb_data);
	414	}
	415
4441f427	416	static int debug_reflog_expire(struct ref_store ref_store, const char refname,
cc40b5ce	417	unsigned int flags,
4441f427 HWN	418	reflog_expiry_prepare_fn prepare_fn,
	419	reflog_expiry_should_prune_fn should_prune_fn,
	420	reflog_expiry_cleanup_fn cleanup_fn,
	421	void *policy_cb_data)
	422	{
	423	struct debug_ref_store drefs = (struct debug_ref_store )ref_store;
34c31997 HWN	424	struct debug_reflog_expiry_should_prune prune = {
	425	.prepare = prepare_fn,
	426	.cleanup = cleanup_fn,
	427	.should_prune = should_prune_fn,
	428	.cb_data = policy_cb_data,
	429	};
cc40b5ce	430	int res = drefs->refs->be->reflog_expire(drefs->refs, refname,
34c31997 HWN	431	flags, &debug_reflog_expiry_prepare,
	432	&debug_reflog_expiry_should_prune_fn,
	433	&debug_reflog_expiry_cleanup,
	434	&prune);
4441f427 HWN	435	trace_printf_key(&trace_refs, "reflog_expire: %s: %d\n", refname, res);
	436	return res;
	437	}
	438
	439	struct ref_storage_be refs_be_debug = {
32bff617 ÆAB	440	.next = NULL,
	441	.name = "debug",
	442	.init = NULL,
	443	.init_db = debug_init_db,
5b875404 ÆAB	444
	445	/*
	446	* None of these should be NULL. If the "files" backend (in
	447	* "struct ref_storage_be refs_be_files" in files-backend.c)
	448	* has a function we should also have a wrapper for it here.
	449	* Test the output with "GIT_TRACE_REFS=1".
	450	*/
32bff617 ÆAB	451	.transaction_prepare = debug_transaction_prepare,
	452	.transaction_finish = debug_transaction_finish,
	453	.transaction_abort = debug_transaction_abort,
	454	.initial_transaction_commit = debug_initial_transaction_commit,
	455
	456	.pack_refs = debug_pack_refs,
	457	.create_symref = debug_create_symref,
	458	.delete_refs = debug_delete_refs,
	459	.rename_ref = debug_rename_ref,
	460	.copy_ref = debug_copy_ref,
	461
	462	.iterator_begin = debug_ref_iterator_begin,
	463	.read_raw_ref = debug_read_raw_ref,
5b875404	464	.read_symbolic_ref = debug_read_symbolic_ref,
32bff617 ÆAB	465
	466	.reflog_iterator_begin = debug_reflog_iterator_begin,
	467	.for_each_reflog_ent = debug_for_each_reflog_ent,
	468	.for_each_reflog_ent_reverse = debug_for_each_reflog_ent_reverse,
	469	.reflog_exists = debug_reflog_exists,
	470	.create_reflog = debug_create_reflog,
	471	.delete_reflog = debug_delete_reflog,
	472	.reflog_expire = debug_reflog_expire,
4441f427	473	};