The R13B03 release.OTP_R13B03

1 files changed, 117 insertions, 0 deletions

diff --git a/erts/emulator/beam/erl_lock_check.h b/erts/emulator/beam/erl_lock_check.h
new file mode 100644
index 0000000000..d5e2ede9ac
--- /dev/null
+++ b/erts/emulator/beam/erl_lock_check.h
@@ -0,0 +1,117 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 2005-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+
+/*
+ * Description: A lock checker that checks that each thread acquires
+ *              locks according to a predefined global lock order. The
+ *              global lock order is used to prevent deadlocks. If the
+ *              lock order is violated, an error message is printed
+ *              and the emulator aborts. The lock checker is only
+ *              intended to be enabled when debugging.
+ *
+ * Author: Rickard Green
+ */
+
+#include "sys.h"
+
+#ifndef ERTS_LOCK_CHECK_H__
+#define ERTS_LOCK_CHECK_H__
+
+#ifdef ERTS_ENABLE_LOCK_CHECK
+
+typedef struct {
+    int inited;
+    Sint16 id;
+    Uint16 flags;
+    Eterm extra;
+} erts_lc_lock_t;
+
+#define ERTS_LC_INITITALIZED 0x7f7f7f7f
+
+
+#define ERTS_LC_FLG_LT_SPINLOCK		(((Uint16) 1) << 0)
+#define ERTS_LC_FLG_LT_RWSPINLOCK	(((Uint16) 1) << 1)
+#define ERTS_LC_FLG_LT_MUTEX		(((Uint16) 1) << 2)
+#define ERTS_LC_FLG_LT_RWMUTEX		(((Uint16) 1) << 3)
+#define ERTS_LC_FLG_LT_PROCLOCK		(((Uint16) 1) << 4)
+
+#define ERTS_LC_FLG_LO_READ		(((Uint16) 1) << 5)
+#define ERTS_LC_FLG_LO_WRITE		(((Uint16) 1) << 6)
+
+#define ERTS_LC_FLG_LO_READ_WRITE	(ERTS_LC_FLG_LO_READ		\
+					 | ERTS_LC_FLG_LO_WRITE)
+
+#define ERTS_LC_FLG_LT_ALL		(ERTS_LC_FLG_LT_SPINLOCK	\
+					 | ERTS_LC_FLG_LT_RWSPINLOCK	\
+					 | ERTS_LC_FLG_LT_MUTEX		\
+					 | ERTS_LC_FLG_LT_RWMUTEX	\
+					 | ERTS_LC_FLG_LT_PROCLOCK)
+
+#define ERTS_LC_FLG_LO_ALL		(ERTS_LC_FLG_LO_READ		\
+					 | ERTS_LC_FLG_LO_WRITE)
+
+
+#define ERTS_LC_LOCK_INIT(ID, X, F) {ERTS_LC_INITITALIZED, (ID), (F), (X)}
+
+void erts_lc_init(void);
+void erts_lc_late_init(void);
+Sint16 erts_lc_get_lock_order_id(char *name);
+void erts_lc_check(erts_lc_lock_t *have, int have_len,
+		   erts_lc_lock_t *have_not, int have_not_len);
+void erts_lc_check_exact(erts_lc_lock_t *have, int have_len);
+void erts_lc_have_locks(int *resv, erts_lc_lock_t *lcks, int len);
+void erts_lc_have_lock_ids(int *resv, int *ids, int len);
+int erts_lc_trylock_force_busy_flg(erts_lc_lock_t *lck, Uint16 op_flags);
+void erts_lc_trylock_flg(int locked, erts_lc_lock_t *lck, Uint16 op_flags);
+void erts_lc_lock_flg(erts_lc_lock_t *lck, Uint16 op_flags);
+void erts_lc_unlock_flg(erts_lc_lock_t *lck, Uint16 op_flags);
+void erts_lc_might_unlock_flg(erts_lc_lock_t *lck, Uint16 op_flags);
+int erts_lc_trylock_force_busy(erts_lc_lock_t *lck);
+void erts_lc_trylock(int locked, erts_lc_lock_t *lck);
+void erts_lc_lock(erts_lc_lock_t *lck);
+void erts_lc_unlock(erts_lc_lock_t *lck);
+void erts_lc_might_unlock(erts_lc_lock_t *lck);
+void erts_lc_init_lock(erts_lc_lock_t *lck, char *name, Uint16 flags);
+void erts_lc_init_lock_x(erts_lc_lock_t *lck, char *name, Uint16 flags, Eterm extra);
+void erts_lc_destroy_lock(erts_lc_lock_t *lck);
+void erts_lc_fail(char *fmt, ...);
+int erts_lc_assert_failed(char *file, int line, char *assertion);
+void erts_lc_set_thread_name(char *thread_name);
+void erts_lc_pll(void);
+
+void erts_lc_require_lock_flg(erts_lc_lock_t *lck, Uint16 op_flags);
+void erts_lc_unrequire_lock_flg(erts_lc_lock_t *lck, Uint16 op_flags);
+
+void erts_lc_require_lock(erts_lc_lock_t *lck);
+void erts_lc_unrequire_lock(erts_lc_lock_t *lck);
+
+
+#define ERTS_LC_ASSERT(A) \
+  ((void) ((A) ? 1 : erts_lc_assert_failed(__FILE__, __LINE__, #A)))
+#ifdef ERTS_SMP
+#define ERTS_SMP_LC_ASSERT(A) ERTS_LC_ASSERT(A)
+#else
+#define ERTS_SMP_LC_ASSERT(A) ((void) 1)
+#endif
+#else /* #ifdef ERTS_ENABLE_LOCK_CHECK */
+#define ERTS_SMP_LC_ASSERT(A) ((void) 1)
+#define ERTS_LC_ASSERT(A) ((void) 1)
+#endif /* #ifdef ERTS_ENABLE_LOCK_CHECK */
+
+#endif /* #ifndef ERTS_LOCK_CHECK_H__ */