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git/refs/debug.c

473 lines
15 KiB

#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,
};