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/*-
* Copyright (c) 2014-2019 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#ifdef HAVE_DIAGNOSTIC
/*
* Capture cases where a single session handle is used by multiple threads in parallel. The check
* isn't trivial because some API calls re-enter via public API entry points and the session with ID
* 0 is the default session in the connection handle which can be used across multiple threads. It
* is safe to use the reference count without atomic operations because the reference count is only
* tracking a thread re-entering the API.
*/
#define WT_SINGLE_THREAD_CHECK_START(s) \
{ \
uintmax_t __tmp_api_tid; \
__wt_thread_id(&__tmp_api_tid); \
WT_ASSERT(session, (s)->id == 0 || (s)->api_tid == 0 || (s)->api_tid == __tmp_api_tid); \
if ((s)->api_tid == 0) \
WT_PUBLISH((s)->api_tid, __tmp_api_tid); \
++(s)->api_enter_refcnt; \
}
#define WT_SINGLE_THREAD_CHECK_STOP(s) \
if (--(s)->api_enter_refcnt == 0) \
WT_PUBLISH((s)->api_tid, 0);
#else
#define WT_SINGLE_THREAD_CHECK_START(s)
#define WT_SINGLE_THREAD_CHECK_STOP(s)
#endif
/* Standard entry points to the API: declares/initializes local variables. */
#define API_SESSION_INIT(s, h, n, dh) \
WT_TRACK_OP_DECL; \
WT_DATA_HANDLE *__olddh = (s)->dhandle; \
const char *__oldname = (s)->name; \
(s)->dhandle = (dh); \
(s)->name = (s)->lastop = #h "." #n; \
/* \
* No code before this line, otherwise error handling won't be \
* correct. \
*/ \
WT_TRACK_OP_INIT(s); \
WT_SINGLE_THREAD_CHECK_START(s); \
__wt_op_timer_start(s); \
WT_ERR(WT_SESSION_CHECK_PANIC(s)); \
/* Reset wait time if this isn't an API reentry. */ \
if (__oldname == NULL) \
(s)->cache_wait_us = 0; \
__wt_verbose((s), WT_VERB_API, "%s", "CALL: " #h ":" #n)
#define API_CALL_NOCONF(s, h, n, dh) \
do { \
API_SESSION_INIT(s, h, n, dh)
#define API_CALL(s, h, n, dh, config, cfg) \
do { \
const char *(cfg)[] = {WT_CONFIG_BASE(s, h##_##n), config, NULL}; \
API_SESSION_INIT(s, h, n, dh); \
if ((config) != NULL) \
WT_ERR(__wt_config_check((s), WT_CONFIG_REF(session, h##_##n), (config), 0))
#define API_END(s, ret) \
if ((s) != NULL) { \
WT_TRACK_OP_END(s); \
WT_SINGLE_THREAD_CHECK_STOP(s); \
if ((ret) != 0 && (ret) != WT_NOTFOUND && (ret) != WT_DUPLICATE_KEY && \
(ret) != WT_PREPARE_CONFLICT && F_ISSET(&(s)->txn, WT_TXN_RUNNING)) \
F_SET(&(s)->txn, WT_TXN_ERROR); \
/* \
* No code after this line, otherwise error handling \
* won't be correct. \
*/ \
(s)->dhandle = __olddh; \
(s)->name = __oldname; \
} \
} \
while (0)
/* An API call wrapped in a transaction if necessary. */
#define TXN_API_CALL(s, h, n, bt, config, cfg) \
do { \
bool __autotxn = false, __update = false; \
API_CALL(s, h, n, bt, config, cfg); \
__wt_txn_timestamp_flags(s); \
__autotxn = !F_ISSET(&(s)->txn, WT_TXN_AUTOCOMMIT | WT_TXN_RUNNING); \
if (__autotxn) \
F_SET(&(s)->txn, WT_TXN_AUTOCOMMIT); \
__update = !F_ISSET(&(s)->txn, WT_TXN_UPDATE); \
if (__update) \
F_SET(&(s)->txn, WT_TXN_UPDATE);
/* An API call wrapped in a transaction if necessary. */
#define TXN_API_CALL_NOCONF(s, h, n, dh) \
do { \
bool __autotxn = false, __update = false; \
API_CALL_NOCONF(s, h, n, dh); \
__wt_txn_timestamp_flags(s); \
__autotxn = !F_ISSET(&(s)->txn, WT_TXN_AUTOCOMMIT | WT_TXN_RUNNING); \
if (__autotxn) \
F_SET(&(s)->txn, WT_TXN_AUTOCOMMIT); \
__update = !F_ISSET(&(s)->txn, WT_TXN_UPDATE); \
if (__update) \
F_SET(&(s)->txn, WT_TXN_UPDATE);
/* End a transactional API call, optional retry on deadlock. */
#define TXN_API_END_RETRY(s, ret, retry) \
API_END(s, ret); \
if (__update) \
F_CLR(&(s)->txn, WT_TXN_UPDATE); \
if (__autotxn) { \
if (F_ISSET(&(s)->txn, WT_TXN_AUTOCOMMIT)) \
F_CLR(&(s)->txn, WT_TXN_AUTOCOMMIT); \
else if ((ret) == 0 && !F_ISSET(&(s)->txn, WT_TXN_ERROR)) \
(ret) = __wt_txn_commit((s), NULL); \
else { \
if (retry) \
WT_TRET(__wt_session_copy_values(s)); \
WT_TRET(__wt_txn_rollback((s), NULL)); \
if (((ret) == 0 || (ret) == WT_ROLLBACK) && (retry)) { \
(ret) = 0; \
continue; \
} \
WT_TRET(__wt_session_reset_cursors(s, false)); \
} \
} \
break; \
} \
while (1)
/* End a transactional API call, retry on deadlock. */
#define TXN_API_END(s, ret) TXN_API_END_RETRY(s, ret, 1)
/*
* In almost all cases, API_END is returning immediately, make it simple. If a session or connection
* method is about to return WT_NOTFOUND (some underlying object was not found), map it to ENOENT,
* only cursor methods return WT_NOTFOUND.
*/
#define API_END_RET(s, ret) \
API_END(s, ret); \
return (ret)
#define API_END_RET_NOTFOUND_MAP(s, ret) \
API_END(s, ret); \
return ((ret) == WT_NOTFOUND ? ENOENT : (ret))
/*
* Used in cases where transaction error should not be set, but the error is returned from the API.
* Success is passed to the API_END macro. If the method is about to return WT_NOTFOUND map it to
* ENOENT.
*/
#define API_END_RET_NO_TXN_ERROR(s, ret) \
API_END(s, 0); \
return ((ret) == WT_NOTFOUND ? ENOENT : (ret))
#define CONNECTION_API_CALL(conn, s, n, config, cfg) \
s = (conn)->default_session; \
API_CALL(s, WT_CONNECTION, n, NULL, config, cfg)
#define CONNECTION_API_CALL_NOCONF(conn, s, n) \
s = (conn)->default_session; \
API_CALL_NOCONF(s, WT_CONNECTION, n, NULL)
#define SESSION_API_CALL_PREPARE_ALLOWED(s, n, config, cfg) \
API_CALL(s, WT_SESSION, n, NULL, config, cfg)
#define SESSION_API_CALL(s, n, config, cfg) \
API_CALL(s, WT_SESSION, n, NULL, config, cfg); \
WT_ERR(__wt_txn_context_prepare_check((s)))
#define SESSION_API_CALL_NOCONF(s, n) API_CALL_NOCONF(s, WT_SESSION, n, NULL)
#define SESSION_API_CALL_NOCONF_PREPARE_NOT_ALLOWED(s, n) \
API_CALL_NOCONF(s, WT_SESSION, n, NULL); \
WT_ERR(__wt_txn_context_prepare_check((s)))
#define SESSION_TXN_API_CALL(s, n, config, cfg) \
TXN_API_CALL(s, WT_SESSION, n, NULL, config, cfg); \
WT_ERR(__wt_txn_context_prepare_check((s)))
#define CURSOR_API_CALL(cur, s, n, bt) \
(s) = (WT_SESSION_IMPL *)(cur)->session; \
API_CALL_NOCONF(s, WT_CURSOR, n, ((bt) == NULL) ? NULL : ((WT_BTREE *)(bt))->dhandle); \
WT_ERR(__wt_txn_context_prepare_check((s))); \
if (F_ISSET(cur, WT_CURSTD_CACHED)) \
WT_ERR(__wt_cursor_cached(cur))
#define CURSOR_API_CALL_PREPARE_ALLOWED(cur, s, n, bt) \
(s) = (WT_SESSION_IMPL *)(cur)->session; \
API_CALL_NOCONF(s, WT_CURSOR, n, ((bt) == NULL) ? NULL : ((WT_BTREE *)(bt))->dhandle); \
if (F_ISSET(cur, WT_CURSTD_CACHED)) \
WT_ERR(__wt_cursor_cached(cur))
#define JOINABLE_CURSOR_CALL_CHECK(cur) \
if (F_ISSET(cur, WT_CURSTD_JOINED)) \
WT_ERR(__wt_curjoin_joined(cur))
#define JOINABLE_CURSOR_API_CALL(cur, s, n, bt) \
CURSOR_API_CALL(cur, s, n, bt); \
JOINABLE_CURSOR_CALL_CHECK(cur)
#define JOINABLE_CURSOR_API_CALL_PREPARE_ALLOWED(cur, s, n, bt) \
CURSOR_API_CALL_PREPARE_ALLOWED(cur, s, n, bt); \
JOINABLE_CURSOR_CALL_CHECK(cur)
#define CURSOR_REMOVE_API_CALL(cur, s, bt) \
(s) = (WT_SESSION_IMPL *)(cur)->session; \
TXN_API_CALL_NOCONF( \
s, WT_CURSOR, remove, ((bt) == NULL) ? NULL : ((WT_BTREE *)(bt))->dhandle); \
WT_ERR(__wt_txn_context_prepare_check((s)))
#define JOINABLE_CURSOR_REMOVE_API_CALL(cur, s, bt) \
CURSOR_REMOVE_API_CALL(cur, s, bt); \
JOINABLE_CURSOR_CALL_CHECK(cur)
#define CURSOR_UPDATE_API_CALL_BTREE(cur, s, n, bt) \
(s) = (WT_SESSION_IMPL *)(cur)->session; \
TXN_API_CALL_NOCONF(s, WT_CURSOR, n, ((WT_BTREE *)(bt))->dhandle); \
WT_ERR(__wt_txn_context_prepare_check((s))); \
if (F_ISSET(S2C(s), WT_CONN_IN_MEMORY) && !F_ISSET((WT_BTREE *)(bt), WT_BTREE_IGNORE_CACHE) && \
__wt_cache_full(s)) \
WT_ERR(WT_CACHE_FULL);
#define CURSOR_UPDATE_API_CALL(cur, s, n) \
(s) = (WT_SESSION_IMPL *)(cur)->session; \
TXN_API_CALL_NOCONF(s, WT_CURSOR, n, NULL); \
WT_ERR(__wt_txn_context_prepare_check((s)))
#define JOINABLE_CURSOR_UPDATE_API_CALL(cur, s, n) \
CURSOR_UPDATE_API_CALL(cur, s, n); \
JOINABLE_CURSOR_CALL_CHECK(cur)
#define CURSOR_UPDATE_API_END(s, ret) \
if ((ret) == WT_PREPARE_CONFLICT) \
(ret) = WT_ROLLBACK; \
TXN_API_END(s, ret)
#define ASYNCOP_API_CALL(conn, s, n) \
s = (conn)->default_session; \
API_CALL_NOCONF(s, asyncop, n, NULL)
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