Many files:

  Merge InnoDB-.48


sql/ha_innobase.cc:
  Merge InnoDB-.48
innobase/include/dict0dict.h:
  Merge InnoDB-.48
innobase/include/dict0mem.h:
  Merge InnoDB-.48
innobase/include/mem0dbg.h:
  Merge InnoDB-.48
innobase/include/mem0mem.h:
  Merge InnoDB-.48
innobase/include/que0que.h:
  Merge InnoDB-.48
innobase/include/row0mysql.h:
  Merge InnoDB-.48
innobase/include/srv0srv.h:
  Merge InnoDB-.48
innobase/include/trx0sys.h:
  Merge InnoDB-.48
innobase/include/trx0trx.h:
  Merge InnoDB-.48
innobase/include/mem0mem.ic:
  Merge InnoDB-.48
innobase/dict/dict0dict.c:
  Merge InnoDB-.48
innobase/dict/dict0mem.c:
  Merge InnoDB-.48
innobase/log/log0recv.c:
  Merge InnoDB-.48
innobase/mem/mem0dbg.c:
  Merge InnoDB-.48
innobase/mem/mem0mem.c:
  Merge InnoDB-.48
innobase/pars/lexyy.c:
  Merge InnoDB-.48
innobase/que/que0que.c:
  Merge InnoDB-.48
innobase/rem/rem0rec.c:
  Merge InnoDB-.48
innobase/row/row0mysql.c:
  Merge InnoDB-.48
innobase/row/row0sel.c:
  Merge InnoDB-.48
innobase/srv/srv0srv.c:
  Merge InnoDB-.48
innobase/sync/sync0arr.c:
  Merge InnoDB-.48
innobase/trx/trx0sys.c:
  Merge InnoDB-.48
innobase/trx/trx0trx.c:
  Merge InnoDB-.48
innobase/trx/trx0undo.c:
  Merge InnoDB-.48

25 files changed, 846 insertions, 183 deletions

diff --git a/innobase/dict/dict0dict.c b/innobase/dict/dict0dict.c
index 9e32be9e02d..95f9b54c914 100644
--- a/innobase/dict/dict0dict.c
+++ b/innobase/dict/dict0dict.c
@@ -196,6 +196,38 @@ dict_mutex_exit_for_mysql(void)
 }
 	
 /************************************************************************
+Increments the count of open MySQL handles to a table. */
+
+void
+dict_table_increment_handle_count(
+/*==============================*/
+	dict_table_t*	table)	/* in: table */
+{
+	mutex_enter(&(dict_sys->mutex));
+
+	table->n_mysql_handles_opened++;
+	
+	mutex_exit(&(dict_sys->mutex));
+}
+
+/************************************************************************
+Decrements the count of open MySQL handles to a table. */
+
+void
+dict_table_decrement_handle_count(
+/*==============================*/
+	dict_table_t*	table)	/* in: table */
+{
+	mutex_enter(&(dict_sys->mutex));
+
+	ut_a(table->n_mysql_handles_opened > 0);
+
+	table->n_mysql_handles_opened--;
+	
+	mutex_exit(&(dict_sys->mutex));
+}
+
+/************************************************************************
 Gets the nth column of a table. */
 
 dict_col_t*
diff --git a/innobase/dict/dict0mem.c b/innobase/dict/dict0mem.c
index 019d6ef334f..1f9a44aca35 100644
--- a/innobase/dict/dict0mem.c
+++ b/innobase/dict/dict0mem.c
@@ -59,6 +59,9 @@ dict_mem_table_create(
 	table->n_def = 0;
 	table->n_cols = n_cols + DATA_N_SYS_COLS;
 	table->mem_fix = 0;
+
+	table->n_mysql_handles_opened = 0;
+
 	table->cached = FALSE;
 	
 	table->cols = mem_heap_alloc(heap, (n_cols + DATA_N_SYS_COLS)
diff --git a/innobase/include/dict0dict.h b/innobase/include/dict0dict.h
index ae313398c99..79d67ecae15 100644
--- a/innobase/include/dict0dict.h
+++ b/innobase/include/dict0dict.h
@@ -26,6 +26,20 @@ Created 1/8/1996 Heikki Tuuri
 #include "ut0byte.h"
 #include "trx0types.h"
 
+/************************************************************************
+Increments the count of open MySQL handles to a table. */
+
+void
+dict_table_increment_handle_count(
+/*==============================*/
+	dict_table_t*	table);	/* in: table */
+/************************************************************************
+Decrements the count of open MySQL handles to a table. */
+
+void
+dict_table_decrement_handle_count(
+/*==============================*/
+	dict_table_t*	table);	/* in: table */
 /**************************************************************************
 Inits the data dictionary module. */
 
diff --git a/innobase/include/dict0mem.h b/innobase/include/dict0mem.h
index 2f00ccfcf32..5ef0103087a 100644
--- a/innobase/include/dict0mem.h
+++ b/innobase/include/dict0mem.h
@@ -307,6 +307,12 @@ struct dict_table_struct{
 	ulint		mem_fix;/* count of how many times the table 
 				and its indexes has been fixed in memory;
 				currently NOT used */
+	ulint		n_mysql_handles_opened;
+				/* count of how many handles MySQL has opened
+				to this table; dropping of the table is
+				NOT allowed until this count gets to zero;
+				MySQL does NOT itself check the number of
+				open handles at drop */
 	ibool		cached;	/* TRUE if the table object has been added
 				to the dictionary cache */
 	lock_t*		auto_inc_lock;/* a buffer for an auto-inc lock
diff --git a/innobase/include/mem0dbg.h b/innobase/include/mem0dbg.h
index dda37626198..0b1aa53d694 100644
--- a/innobase/include/mem0dbg.h
+++ b/innobase/include/mem0dbg.h
@@ -10,11 +10,14 @@ Created 6/9/1994 Heikki Tuuri
 /* In the debug version each allocated field is surrounded with
 check fields whose sizes are given below */
 
+#ifdef UNIV_MEM_DEBUG
 #define MEM_FIELD_HEADER_SIZE   ut_calc_align(2 * sizeof(ulint),\
 						UNIV_MEM_ALIGNMENT)
 #define MEM_FIELD_TRAILER_SIZE  sizeof(ulint)
+#else
+#define MEM_FIELD_HEADER_SIZE   0
+#endif
 
-#define MEM_BLOCK_MAGIC_N	764741
 
 /* Space needed when allocating for a user a field of
 length N. The space is allocated only in multiples of
@@ -115,3 +118,12 @@ ibool
 mem_validate(void);
 /*===============*/
 			/* out: TRUE if ok */
+/****************************************************************
+Tries to find neigboring memory allocation blocks and dumps to stderr
+the neighborhood of a given pointer. */
+
+void
+mem_analyze_corruption(
+/*===================*/
+	byte*	ptr);	/* in: pointer to place of possible corruption */
+
diff --git a/innobase/include/mem0mem.h b/innobase/include/mem0mem.h
index 95024cf8011..57fac93d3ac 100644
--- a/innobase/include/mem0mem.h
+++ b/innobase/include/mem0mem.h
@@ -61,58 +61,41 @@ mem_init(
 /******************************************************************
 Use this macro instead of the corresponding function! Macro for memory
 heap creation. */
-#ifdef UNIV_MEM_DEBUG
+
 #define mem_heap_create(N)    mem_heap_create_func(\
 						(N), NULL, MEM_HEAP_DYNAMIC,\
 						IB__FILE__, __LINE__)
-#else
-#define mem_heap_create(N)    mem_heap_create_func(N, NULL, MEM_HEAP_DYNAMIC)
-#endif
 /******************************************************************
 Use this macro instead of the corresponding function! Macro for memory
 heap creation. */
-#ifdef UNIV_MEM_DEBUG
+
 #define mem_heap_create_in_buffer(N)	mem_heap_create_func(\
 						(N), NULL, MEM_HEAP_BUFFER,\
 						IB__FILE__, __LINE__)
-#else
-#define mem_heap_create_in_buffer(N)	mem_heap_create_func(N, NULL,\
-						MEM_HEAP_BUFFER)
-#endif
 /******************************************************************
 Use this macro instead of the corresponding function! Macro for memory
 heap creation. */
-#ifdef UNIV_MEM_DEBUG
+
 #define mem_heap_create_in_btr_search(N) mem_heap_create_func(\
 					(N), NULL, MEM_HEAP_BTR_SEARCH |\
 						MEM_HEAP_BUFFER,\
 						IB__FILE__, __LINE__)
-#else
-#define mem_heap_create_in_btr_search(N) mem_heap_create_func(N, NULL,\
-				MEM_HEAP_BTR_SEARCH | MEM_HEAP_BUFFER)
-#endif
 /******************************************************************
 Use this macro instead of the corresponding function! Macro for fast
 memory heap creation. An initial block of memory B is given by the
 caller, N is its size, and this memory block is not freed by
 mem_heap_free. See the parameter comment in mem_heap_create_func below. */
-#ifdef UNIV_MEM_DEBUG
+
 #define mem_heap_fast_create(N, B)	mem_heap_create_func(\
 						(N), (B), MEM_HEAP_DYNAMIC,\
 						IB__FILE__, __LINE__)
-#else
-#define mem_heap_fast_create(N, B)    	mem_heap_create_func(N, (B),\
-						MEM_HEAP_DYNAMIC)
-#endif
+
 /******************************************************************
 Use this macro instead of the corresponding function! Macro for memory
 heap freeing. */
-#ifdef  UNIV_MEM_DEBUG
+
 #define mem_heap_free(heap) mem_heap_free_func(\
 					  (heap), IB__FILE__, __LINE__)
-#else
-#define mem_heap_free(heap) mem_heap_free_func(heap)
-#endif
 /*********************************************************************
 NOTE: Use the corresponding macros instead of this function. Creates a
 memory heap which allocates memory from dynamic space. For debugging
@@ -139,11 +122,9 @@ mem_heap_create_func(
 				block is not unintentionally erased
 				(if allocated in the stack), before
 				the memory heap is explicitly freed. */
-	ulint	type		/* in: MEM_HEAP_DYNAMIC or MEM_HEAP_BUFFER */ 
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,	/* in: file name where created */
+	ulint	type,		/* in: MEM_HEAP_DYNAMIC or MEM_HEAP_BUFFER */ 
+	char*   file_name,	/* in: file name where created */
 	ulint	line		/* in: line where created */
-	#endif
 	);
 /*********************************************************************
 NOTE: Use the corresponding macro instead of this function.
@@ -152,11 +133,9 @@ UNIV_INLINE
 void
 mem_heap_free_func(
 /*===============*/
-	mem_heap_t*   heap  	/* in, own: heap to be freed */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,      /* in: file name where freed */
-	ulint   line            /* in: line where freed */
-	#endif
+	mem_heap_t*   	heap,		/* in, own: heap to be freed */
+	char*  		file_name,	/* in: file name where freed */
+	ulint   	line		/* in: line where freed */
 );
 /*******************************************************************
 Allocates n bytes of memory from a memory heap. */
@@ -220,25 +199,18 @@ UNIV_INLINE
 ulint
 mem_heap_get_size(
 /*==============*/
-	mem_heap_t*   heap);  	/* in: heap */
+	mem_heap_t*	heap);  	/* in: heap */
 /******************************************************************
 Use this macro instead of the corresponding function!
 Macro for memory buffer allocation */
-#ifdef UNIV_MEM_DEBUG
-#define mem_alloc(N)    mem_alloc_func(\
-					  (N), IB__FILE__, __LINE__)
-#else
-#define mem_alloc(N)    mem_alloc_func(N)
-#endif
+
+#define mem_alloc(N)    mem_alloc_func((N), IB__FILE__, __LINE__)
 /******************************************************************
 Use this macro instead of the corresponding function!
 Macro for memory buffer allocation */
-#ifdef UNIV_MEM_DEBUG
+
 #define mem_alloc_noninline(N)    mem_alloc_func_noninline(\
 					  (N), IB__FILE__, __LINE__)
-#else
-#define mem_alloc_noninline(N)    mem_alloc_func_noninline(N)
-#endif
 /*******************************************************************
 NOTE: Use the corresponding macro instead of this function.
 Allocates a single buffer of memory from the dynamic memory of
@@ -250,11 +222,9 @@ mem_alloc_func(
 /*===========*/
 				/* out, own: free storage, NULL
 				if did not succeed */
-	ulint    n              /* in: desired number of bytes */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,      /* in: file name where created */
-	ulint    line            /* in: line where created */
-	#endif
+	ulint 	n,              /* in: desired number of bytes */
+	char*  	file_name,  	/* in: file name where created */
+	ulint 	line            /* in: line where created */
 );
 /*******************************************************************
 NOTE: Use the corresponding macro instead of this function.
@@ -267,21 +237,15 @@ mem_alloc_func_noninline(
 /*=====================*/
 				/* out, own: free storage, NULL if did not
 				succeed */
-	ulint   n              	/* in: desired number of bytes */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,	/* in: file name where created */
+	ulint   n,              /* in: desired number of bytes */
+	char*  	file_name,	/* in: file name where created */
 	ulint   line		/* in: line where created */
-	#endif
 	);
 /******************************************************************
 Use this macro instead of the corresponding function!
 Macro for memory buffer freeing */
-#ifdef  UNIV_MEM_DEBUG
-#define mem_free(PTR)   mem_free_func(\
-					  (PTR), IB__FILE__, __LINE__)
-#else
-#define mem_free(PTR)   mem_free_func(PTR)
-#endif
+
+#define mem_free(PTR)   mem_free_func((PTR), IB__FILE__, __LINE__)
 /*******************************************************************
 NOTE: Use the corresponding macro instead of this function.
 Frees a single buffer of storage from
@@ -290,11 +254,9 @@ UNIV_INLINE
 void
 mem_free_func(
 /*==========*/
-	void*   ptr             /* in, own: buffer to be freed */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,      /* in: file name where created */
-	ulint    line            /* in: line where created */
-	#endif
+	void*   ptr,    	/* in, own: buffer to be freed */
+	char*  	file_name,  	/* in: file name where created */
+	ulint 	line            /* in: line where created */
 );
 /*******************************************************************
 Implements realloc. */
@@ -304,7 +266,9 @@ mem_realloc(
 /*========*/
 			/* out, own: free storage, NULL if did not succeed */
 	void*	buf,	/* in: pointer to an old buffer */
-	ulint   n);	/* in: desired number of bytes */
+	ulint   n,	/* in: desired number of bytes */
+	char*  	file_name,/* in: file name where called */
+	ulint 	line);  /* in: line where called */
 
 
 /*#######################################################################*/
@@ -336,8 +300,13 @@ struct mem_block_info_struct {
 			free block to the heap, if we need more space;
 			otherwise, this is NULL */
 	ulint   magic_n;/* magic number for debugging */
+	char	file_name[8];/* file name where the mem heap was created */
+	ulint	line;	/* line number where the mem heap was created */
 };
 
+#define MEM_BLOCK_MAGIC_N	764741555
+#define MEM_FREED_BLOCK_MAGIC_N	547711122
+
 /* Header size for a memory heap block */
 #define MEM_BLOCK_HEADER_SIZE   ut_calc_align(sizeof(mem_block_info_t),\
 							UNIV_MEM_ALIGNMENT)
diff --git a/innobase/include/mem0mem.ic b/innobase/include/mem0mem.ic
index edc3ab17f2a..a7abb93d91d 100644
--- a/innobase/include/mem0mem.ic
+++ b/innobase/include/mem0mem.ic
@@ -24,8 +24,10 @@ mem_heap_create_block(
 			if init_block is not NULL, its size in bytes */
 	void*	init_block, /* in: init block in fast create, type must be
 			MEM_HEAP_DYNAMIC */
-	ulint 	type);	/* in: type of heap: MEM_HEAP_DYNAMIC or
+	ulint 	type,	/* in: type of heap: MEM_HEAP_DYNAMIC or
 			MEM_HEAP_BUFFER */
+	char*  	file_name,/* in: file name where created */
+	ulint 	line);   /* in: line where created */
 /**********************************************************************
 Frees a block from a memory heap. */
 
@@ -392,21 +394,20 @@ mem_heap_create_func(
 				block is not unintentionally erased
 				(if allocated in the stack), before
 				the memory heap is explicitly freed. */
-	ulint	type		/* in: MEM_HEAP_DYNAMIC, or MEM_HEAP_BUFFER
+	ulint	type,		/* in: MEM_HEAP_DYNAMIC, or MEM_HEAP_BUFFER
 				possibly ORed to MEM_HEAP_BTR_SEARCH */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,	/* in: file name where created */
+	char*  	file_name,	/* in: file name where created */
 	ulint	line		/* in: line where created */
-	#endif
 	)
 {
 	mem_block_t*   block; 
 
 	if (n > 0) {
-		block = mem_heap_create_block(NULL, n, init_block, type);
+		block = mem_heap_create_block(NULL, n, init_block, type,
+							file_name, line);
 	} else {
 		block = mem_heap_create_block(NULL, MEM_BLOCK_START_SIZE, 
-							init_block, type);
+					init_block, type, file_name, line);
 	}
 
 	ut_ad(block);
@@ -438,11 +439,9 @@ UNIV_INLINE
 void
 mem_heap_free_func(
 /*===============*/
-	mem_heap_t*   	heap  		/* in, own: heap to be freed */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  	file_name,	/* in: file name where freed */
+	mem_heap_t*   	heap,  		/* in, own: heap to be freed */
+	char*  		file_name,	/* in: file name where freed */
 	ulint    	line		/* in: line where freed */
-	#endif
 	)
 {
 	mem_block_t*	block;
@@ -488,14 +487,12 @@ mem_alloc_func(
 /*===========*/
 				/* out, own: free storage, NULL if did not
 				succeed */
-	ulint   n              	/* in: desired number of bytes */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,	/* in: file name where created */
+	ulint   n,              /* in: desired number of bytes */
+	char*  	file_name,	/* in: file name where created */
 	ulint   line		/* in: line where created */
-	#endif
 	)
 {
-	#ifndef UNIV_MEM_DEBUG
+#ifdef notdefined
 	void* buf;
 
 	buf = mem_area_alloc(n, mem_comm_pool);
@@ -505,7 +502,7 @@ mem_alloc_func(
 #endif
 	return(buf);
 	
-	#else
+#else
 	
 	mem_heap_t*   	heap; 
 	void*           buf;
@@ -524,11 +521,11 @@ mem_alloc_func(
 
 	buf = mem_heap_alloc(heap, n);
 
-	ut_ad((byte*)heap == (byte*)buf - MEM_BLOCK_HEADER_SIZE
+	ut_a((byte*)heap == (byte*)buf - MEM_BLOCK_HEADER_SIZE
 					- MEM_FIELD_HEADER_SIZE);
 	return(buf);
 
-	#endif
+#endif
 }
 
 /*******************************************************************
@@ -539,26 +536,22 @@ UNIV_INLINE
 void
 mem_free_func(
 /*==========*/
-	void*   ptr             /* in, own: buffer to be freed */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,      /* in: file name where created */
+	void*   ptr,       	/* in, own: buffer to be freed */
+	char*  	file_name,      /* in: file name where created */
 	ulint   line            /* in: line where created */
-	#endif
 	)
 {
-	#ifndef UNIV_MEM_DEBUG
+#ifdef notdefined
 
 	mem_area_free(ptr, mem_comm_pool);
        
-	#else
-	
+#else
 	mem_heap_t*   heap; 
 
 	heap = (mem_heap_t*)((byte*)ptr - MEM_BLOCK_HEADER_SIZE
 				 		- MEM_FIELD_HEADER_SIZE);
 	mem_heap_free_func(heap, file_name, line);
-	
-	#endif
+#endif
 }
 
 /*********************************************************************
@@ -567,7 +560,7 @@ UNIV_INLINE
 ulint
 mem_heap_get_size(
 /*==============*/
-	mem_heap_t*   heap)  	/* in: heap */
+	mem_heap_t*   	heap)  	/* in: heap */
 {
 	mem_block_t*  	block;
 	ulint           size	= 0;
@@ -597,9 +590,11 @@ mem_realloc(
 /*========*/
 			/* out, own: free storage, NULL if did not succeed */
 	void*	buf,	/* in: pointer to an old buffer */
-	ulint   n)	/* in: desired number of bytes */
+	ulint   n,	/* in: desired number of bytes */
+	char*  	file_name,/* in: file name where called */
+	ulint 	line)  	/* in: line where called */
 {
 	mem_free(buf);
 
-	return(mem_alloc(n));
+	return(mem_alloc_func(n, file_name, line));
 }
diff --git a/innobase/include/que0que.h b/innobase/include/que0que.h
index 4cbd888ba1d..cdaeeae1fde 100644
--- a/innobase/include/que0que.h
+++ b/innobase/include/que0que.h
@@ -327,6 +327,8 @@ mutex with the exceptions named below */
 
 struct que_thr_struct{
 	que_common_t	common;		/* type: QUE_NODE_THR */
+	ulint		magic_n;	/* magic number to catch memory
+					corruption */
 	que_node_t*	child;		/* graph child node */
 	que_t*		graph;		/* graph where this node belongs */
 	ibool		is_active;	/* TRUE if the thread has been set
@@ -357,6 +359,9 @@ struct que_thr_struct{
 					thus far */
 };
 
+#define QUE_THR_MAGIC_N		8476583
+#define QUE_THR_MAGIC_FREED	123461526
+
 /* Query graph fork node: its fields are protected by the kernel mutex */
 struct que_fork_struct{
 	que_common_t	common;		/* type: QUE_NODE_FORK */
diff --git a/innobase/include/row0mysql.h b/innobase/include/row0mysql.h
index 32354219e64..0346299bb10 100644
--- a/innobase/include/row0mysql.h
+++ b/innobase/include/row0mysql.h
@@ -323,11 +323,18 @@ struct mysql_row_templ_struct {
 /* After fetching this many rows, we start caching them in fetch_cache */
 #define MYSQL_FETCH_CACHE_THRESHOLD	4
 
+#define ROW_PREBUILT_ALLOCATED	78540783
+#define ROW_PREBUILT_FREED	26423527
 
 /* A struct for (sometimes lazily) prebuilt structures in an Innobase table
 handle used within MySQL; these are used to save CPU time. */
 
 struct row_prebuilt_struct {
+	ulint		magic_n;	/* this magic number is set to
+					ROW_PREBUILT_ALLOCATED when created
+					and to ROW_PREBUILT_FREED when the
+					struct has been freed; used in
+					debugging */
 	dict_table_t*	table;		/* Innobase table handle */
 	trx_t*		trx;		/* current transaction handle */
 	ibool		sql_stat_start;	/* TRUE when we start processing of
diff --git a/innobase/include/srv0srv.h b/innobase/include/srv0srv.h
index 1a37460569b..05989c6410e 100644
--- a/innobase/include/srv0srv.h
+++ b/innobase/include/srv0srv.h
@@ -17,6 +17,8 @@ Created 10/10/1995 Heikki Tuuri
 #include "que0types.h"
 #include "trx0types.h"
 
+/* Buffer which can be used in printing fatal error messages */
+extern char	srv_fatal_errbuf[];
 
 /* When this event is set the lock timeout and InnoDB monitor
 thread starts running */
@@ -261,15 +263,27 @@ This lets a thread enter InnoDB regardless of the number of threads inside
 InnoDB. This must be called when a thread ends a lock wait. */
 
 void
-srv_conc_force_enter_innodb(void);
-/*=============================*/
+srv_conc_force_enter_innodb(
+/*========================*/
+	trx_t*	trx);	/* in: transaction object associated with the
+			thread */
 /*************************************************************************
-This must be called when a thread exits InnoDB. This must also be called
-when a thread goes to wait for a lock. */
+This must be called when a thread exits InnoDB in a lock wait or at the
+end of an SQL statement. */
 
 void
-srv_conc_exit_innodb(void);
-/*======================*/
+srv_conc_force_exit_innodb(
+/*=======================*/
+	trx_t*	trx);	/* in: transaction object associated with the
+			thread */
+/*************************************************************************
+This must be called when a thread exits InnoDB. */
+
+void
+srv_conc_exit_innodb(
+/*=================*/
+	trx_t*	trx);	/* in: transaction object associated with the
+			thread */
 /*******************************************************************
 Puts a MySQL OS thread to wait for a lock to be released. */
 
diff --git a/innobase/include/trx0sys.h b/innobase/include/trx0sys.h
index 0295cd6abff..f2eded697ec 100644
--- a/innobase/include/trx0sys.h
+++ b/innobase/include/trx0sys.h
@@ -218,6 +218,22 @@ trx_in_trx_list(
 /*============*/
 			/* out: TRUE if is in */
 	trx_t*	in_trx);/* in: trx */
+/*********************************************************************
+Updates the offset information about the end of the MySQL binlog entry
+which corresponds to the transaction just being committed. */
+
+void
+trx_sys_update_mysql_binlog_offset(
+/*===============================*/
+	trx_t*	trx,	/* in: transaction being committed */
+	mtr_t*	mtr);	/* in: mtr */
+/*********************************************************************
+Prints to stderr the MySQL binlog offset info in the trx system header if
+the magic number shows it valid. */
+
+void
+trx_sys_print_mysql_binlog_offset(void);
+/*===================================*/
 
 /* The automatically created system rollback segment has this id */
 #define TRX_SYS_SYSTEM_RSEG_ID	0
@@ -236,7 +252,7 @@ therefore 256 */
 
 /* Transaction system header; protected by trx_sys->mutex */
 /*-------------------------------------------------------------*/
-#define	TRX_SYS_TRX_ID_STORE	0	/* The maximum trx id or trx number
+#define	TRX_SYS_TRX_ID_STORE	0	/* the maximum trx id or trx number
 					modulo TRX_SYS_TRX_ID_UPDATE_MARGIN
 					written to a file page by any
 					transaction; the assignment of
@@ -252,6 +268,23 @@ therefore 256 */
 					segment specification slots */
 /*-------------------------------------------------------------*/
 
+#define TRX_SYS_MYSQL_LOG_NAME_LEN	32
+#define TRX_SYS_MYSQL_LOG_MAGIC_N	873422344
+
+/* The offset of the MySQL binlog offset info on the trx system header page */
+#define TRX_SYS_MYSQL_LOG_INFO		(UNIV_PAGE_SIZE - 300)
+#define	TRX_SYS_MYSQL_LOG_MAGIC_N_FLD	0	/* magic number which shows
+						if we have valid data in the
+						MySQL binlog info; the value
+						is ..._MAGIC_N if yes */
+#define TRX_SYS_MYSQL_LOG_NAME		4	/* MySQL log file name */
+#define TRX_SYS_MYSQL_LOG_OFFSET_HIGH	(4 + TRX_SYS_MYSQL_LOG_NAME_LEN)
+						/* high 4 bytes of the offset
+						within that file */
+#define TRX_SYS_MYSQL_LOG_OFFSET_LOW	(8 + TRX_SYS_MYSQL_LOG_NAME_LEN)
+						/* low 4 bytes of the offset
+						within that file */
+
 /* The offset of the doublewrite buffer header on the trx system header page */
 #define TRX_SYS_DOUBLEWRITE		(UNIV_PAGE_SIZE - 200)
 /*-------------------------------------------------------------*/
diff --git a/innobase/include/trx0trx.h b/innobase/include/trx0trx.h
index 58cef01b376..d67628b8bad 100644
--- a/innobase/include/trx0trx.h
+++ b/innobase/include/trx0trx.h
@@ -290,10 +290,20 @@ struct trx_struct{
 					table */
 	dulint		table_id;	/* table id if the preceding field is
 					TRUE */
+	/*------------------------------*/
         void*           mysql_thd;      /* MySQL thread handle corresponding
                                         to this trx, or NULL */
+	char*		mysql_log_file_name;
+					/* If MySQL binlog is used, this field
+					contains a pointer to the latest file
+					name; this is NULL if binlog is not
+					used */
+	ib_longlong	mysql_log_offset;/* If MySQL binlog is used, this field
+					contains the end offset of the binlog
+					entry */
 	os_thread_id_t	mysql_thread_id;/* id of the MySQL thread associated
 					with this transaction object */
+	/*------------------------------*/
 	ulint		n_mysql_tables_in_use; /* number of Innobase tables
 					used in the processing of the current
 					SQL statement in MySQL */
@@ -314,6 +324,18 @@ struct trx_struct{
 					calls from MySQL; this is intended
 					to reduce contention on the search
 					latch */
+	/*------------------------------*/
+	ibool		declared_to_be_inside_innodb;
+					/* this is TRUE if we have declared
+					this transaction in
+					srv_conc_enter_innodb to be inside the
+					InnoDB engine */
+	ulint		n_tickets_to_enter_innodb;
+					/* this can be > 0 only when
+					declared_to_... is TRUE; when we come
+					to srv_conc_innodb_enter, if the value
+					here is > 0, we decrement this by 1 */ 
+	/*------------------------------*/
 	lock_t*		auto_inc_lock;	/* possible auto-inc lock reserved by
 					the transaction; note that it is also
 					in the lock list trx_locks */
diff --git a/innobase/log/log0recv.c b/innobase/log/log0recv.c
index 5cd5850d1a1..7be172685ae 100644
--- a/innobase/log/log0recv.c
+++ b/innobase/log/log0recv.c
@@ -51,6 +51,8 @@ recv_sys_t*	recv_sys = NULL;
 ibool		recv_recovery_on = FALSE;
 ibool		recv_recovery_from_backup_on = FALSE;
 
+ibool		recv_needed_recovery = FALSE;
+
 /* If the following is TRUE, the buffer pool file pages must be invalidated
 after recovery and no ibuf operations are allowed; this becomes TRUE if
 the log record hash table becomes too full, and log records must be merged
@@ -1020,7 +1022,7 @@ loop:
 				if (!has_printed) {
 					fprintf(stderr, 
 "InnoDB: Starting an apply batch of log records to the database...\n"
-"InnoDB: Progress in percents:");
+"InnoDB: Progress in percents: ");
 					has_printed = TRUE;
 				}
 				
@@ -2032,12 +2034,16 @@ recv_recovery_from_checkpoint_start(
 		if (ut_dulint_cmp(checkpoint_lsn, max_flushed_lsn) != 0
 	    	   || ut_dulint_cmp(checkpoint_lsn, min_flushed_lsn) != 0) {
 
+	    	   	recv_needed_recovery = TRUE;
+	    	   
+			ut_print_timestamp(stderr);
+
 	    		fprintf(stderr,
-			"InnoDB: Database was not shut down normally.\n"
-	    		"InnoDB: Starting recovery from log files...\n");
+			  "  InnoDB: Database was not shut down normally.\n"
+	    		  "InnoDB: Starting recovery from log files...\n");
 			fprintf(stderr, 
-	"InnoDB: Starting log scan based on checkpoint at\n"
-	"InnoDB: log sequence number %lu %lu\n",
+			  "InnoDB: Starting log scan based on checkpoint at\n"
+			  "InnoDB: log sequence number %lu %lu\n",
 		 			ut_dulint_get_high(checkpoint_lsn),
 					ut_dulint_get_low(checkpoint_lsn));
 		}
@@ -2199,6 +2205,10 @@ recv_recovery_from_checkpoint_finish(void)
 		"InnoDB: Log records applied to the database\n");
 	}
 
+	if (recv_needed_recovery) {
+		trx_sys_print_mysql_binlog_offset();
+	}
+
 	/* Free the resources of the recovery system */
 
 	recv_recovery_on = FALSE;
diff --git a/innobase/mem/mem0dbg.c b/innobase/mem/mem0dbg.c
index 0d71708b906..f8f62dffa8b 100644
--- a/innobase/mem/mem0dbg.c
+++ b/innobase/mem/mem0dbg.c
@@ -808,7 +808,7 @@ mem_validate_no_assert(void)
 	}
 	
 	mutex_exit(&mem_hash_mutex);
-
+ 
 	return(error);
 
 	#else
@@ -832,3 +832,95 @@ mem_validate(void)
 
 	return(TRUE);
 }
+
+/****************************************************************
+Tries to find neigboring memory allocation blocks and dumps to stderr
+the neighborhood of a given pointer. */
+
+void
+mem_analyze_corruption(
+/*===================*/
+	byte*	ptr)	/* in: pointer to place of possible corruption */
+{
+	byte*	p;
+	ulint	i;
+	ulint	dist;
+
+	ut_sprintf_buf(srv_fatal_errbuf, ptr - 250, 500);
+	fprintf(stderr,
+  "InnoDB: Apparent memory corruption: mem dump %s\n", srv_fatal_errbuf);
+
+	fprintf(stderr,
+  "InnoDB: Scanning backward trying to find previous allocated mem blocks\n");
+
+	p = ptr;
+	dist = 0;
+  
+	for (i = 0; i < 10; i++) {
+		for (;;) {
+			if (((ulint)p) % 4 == 0) {
+
+			    if (*((ulint*)p) == MEM_BLOCK_MAGIC_N) {
+				fprintf(stderr,
+			"Mem block at - %lu, file %s, line %lu\n",
+				dist, p + sizeof(ulint),
+				*(ulint*)(p + 8 + sizeof(ulint)));
+
+				break;
+			    }
+
+			    if (*((ulint*)p) == MEM_FREED_BLOCK_MAGIC_N) {
+				fprintf(stderr,
+			"Freed mem block at - %lu, file %s, line %lu\n",
+				dist, p + sizeof(ulint),
+				*(ulint*)(p + 8 + sizeof(ulint)));
+
+				break;
+			    }
+			}
+
+			p--;
+			dist++;
+		}
+
+		p--;
+		dist++;
+	}
+
+	fprintf(stderr,
+  "InnoDB: Scanning forward trying to find next allocated mem blocks\n");
+
+	p = ptr;
+	dist = 0;
+  
+	for (i = 0; i < 10; i++) {
+		for (;;) {
+			if (((ulint)p) % 4 == 0) {
+
+			    if (*((ulint*)p) == MEM_BLOCK_MAGIC_N) {
+				fprintf(stderr,
+			"Mem block at + %lu, file %s, line %lu\n",
+				dist, p + sizeof(ulint),
+				*(ulint*)(p + 8 + sizeof(ulint)));
+
+				break;
+			    }
+
+			    if (*((ulint*)p) == MEM_FREED_BLOCK_MAGIC_N) {
+				fprintf(stderr,
+			"Freed mem block at + %lu, file %s, line %lu\n",
+				dist, p + sizeof(ulint),
+				*(ulint*)(p + 8 + sizeof(ulint)));
+
+				break;
+			    }
+			}
+
+			p++;
+			dist++;
+		}
+
+		p++;
+		dist++;
+	}
+}
diff --git a/innobase/mem/mem0mem.c b/innobase/mem/mem0mem.c
index 19a2c0d61a7..58fb618e2db 100644
--- a/innobase/mem/mem0mem.c
+++ b/innobase/mem/mem0mem.c
@@ -14,8 +14,9 @@ Created 6/9/1994 Heikki Tuuri
 
 #include "mach0data.h"
 #include "buf0buf.h"
-#include "mem0dbg.c"
 #include "btr0sea.h"
+#include "srv0srv.h"
+#include "mem0dbg.c"
 
 /*
 			THE MEMORY MANAGEMENT
@@ -85,18 +86,12 @@ mem_alloc_func_noninline(
 /*=====================*/
 				/* out, own: free storage, NULL if did not
 				succeed */
-	ulint   n              	/* in: desired number of bytes */
-	#ifdef UNIV_MEM_DEBUG
-	,char*  file_name,	/* in: file name where created */
+	ulint   n,              /* in: desired number of bytes */
+	char*  	file_name,	/* in: file name where created */
 	ulint   line		/* in: line where created */
-	#endif
 	)
 {
-	return(mem_alloc_func(n
-#ifdef UNIV_MEM_DEBUG
-				, file_name, line
-#endif
-	));	
+	return(mem_alloc_func(n, file_name, line));	
 }
 
 /*******************************************************************
@@ -113,8 +108,10 @@ mem_heap_create_block(
 			if init_block is not NULL, its size in bytes */
 	void*	init_block, /* in: init block in fast create, type must be
 			MEM_HEAP_DYNAMIC */
-	ulint 	type)	/* in: type of heap: MEM_HEAP_DYNAMIC, or
+	ulint 	type,	/* in: type of heap: MEM_HEAP_DYNAMIC, or
 			MEM_HEAP_BUFFER possibly ORed to MEM_HEAP_BTR_SEARCH */
+	char*  	file_name,/* in: file name where created */
+	ulint 	line)   /* in: line where created */
 {
 	mem_block_t*	block;
 	ulint		len;
@@ -164,7 +161,11 @@ mem_heap_create_block(
 	}
 
 	block->magic_n = MEM_BLOCK_MAGIC_N;
-
+	ut_memcpy(&(block->file_name), file_name + ut_strlen(file_name) - 7,
+									7);
+	block->file_name[7]='\0';
+	block->line = line;
+	
 	mem_block_set_len(block, len);
 	mem_block_set_type(block, type);
 	mem_block_set_free(block, MEM_BLOCK_HEADER_SIZE);
@@ -223,8 +224,8 @@ mem_heap_add_block(
 		new_size = n;
 	}
 	
-	new_block = mem_heap_create_block(heap, new_size, NULL, heap->type);
-
+	new_block = mem_heap_create_block(heap, new_size, NULL, heap->type,
+					heap->file_name, heap->line);
 	if (new_block == NULL) {
 
 		return(NULL);
@@ -255,7 +256,8 @@ mem_heap_block_free(
 	type = heap->type;
 	len = block->len;
 	init_block = block->init_block;
-
+	block->magic_n = MEM_FREED_BLOCK_MAGIC_N;
+	
 	#ifdef UNIV_MEM_DEBUG
 	/* In the debug version we set the memory to a random combination
 	of hex 0xDE and 0xAD. */
diff --git a/innobase/pars/lexyy.c b/innobase/pars/lexyy.c
index 67bd12afa60..10bdcdd0990 100644
--- a/innobase/pars/lexyy.c
+++ b/innobase/pars/lexyy.c
@@ -7373,7 +7373,7 @@ void *ptr;
 unsigned int size;
 #endif
 	{
-	return (void *) mem_realloc( ptr, size );
+	return (void *) mem_realloc( ptr, size, __FILE__, __LINE__ );
 	}
 
 #ifdef YY_USE_PROTOS
diff --git a/innobase/que/que0que.c b/innobase/que/que0que.c
index 96e505f8b80..97843311d21 100644
--- a/innobase/que/que0que.c
+++ b/innobase/que/que0que.c
@@ -183,6 +183,8 @@ que_thr_create(
 	thr->common.type = QUE_NODE_THR;
 	thr->common.parent = parent;
 
+	thr->magic_n = QUE_THR_MAGIC_N;
+
 	thr->graph = parent->graph;
 
 	thr->state = QUE_THR_COMMAND_WAIT;
@@ -485,7 +487,6 @@ que_graph_free_recursive(
 	tab_node_t*	cre_tab;
 	ind_node_t*	cre_ind;
 	
-	
 	if (node == NULL) {
 
 		return;
@@ -509,6 +510,16 @@ que_graph_free_recursive(
 
 		thr = node;
 
+		if (thr->magic_n != QUE_THR_MAGIC_N) {
+			fprintf(stderr,
+		"que_thr struct appears corrupt; magic n %lu\n",
+								thr->magic_n);
+			mem_analyze_corruption((byte*)thr);
+			ut_a(0);
+		}
+
+		thr->magic_n = QUE_THR_MAGIC_FREED;
+
 		que_graph_free_recursive(thr->child);
 
 		break;
@@ -606,6 +617,10 @@ que_graph_free_recursive(
 
 		break;
 	default:
+		fprintf(stderr,
+		"que_node struct appears corrupt; type %lu\n",
+						que_node_get_type(node));
+		mem_analyze_corruption((byte*)node);
 		ut_a(0);
 	}
 }
@@ -1068,20 +1083,29 @@ que_thr_stop_for_mysql(
 	mutex_exit(&kernel_mutex);
 }
 
-
 /**************************************************************************
 Moves a thread from another state to the QUE_THR_RUNNING state. Increments
 the n_active_thrs counters of the query graph and transaction if thr was
 not active. */
+
 void
 que_thr_move_to_run_state_for_mysql(
 /*================================*/
 	que_thr_t*	thr,	/* in: an query thread */
 	trx_t*		trx)	/* in: transaction */
 {
+	if (thr->magic_n != QUE_THR_MAGIC_N) {
+		fprintf(stderr,
+	"que_thr struct appears corrupt; magic n %lu\n", thr->magic_n);
+
+		mem_analyze_corruption((byte*)thr);
+
+		ut_a(0);
+	}
+
 	if (!thr->is_active) {
 
-		(thr->graph)->n_active_thrs++;
+		thr->graph->n_active_thrs++;
 
 		trx->n_active_thrs++;
 
@@ -1097,6 +1121,7 @@ que_thr_move_to_run_state_for_mysql(
 /**************************************************************************
 A patch for MySQL used to 'stop' a dummy query thread used in MySQL
 select, when there is no error or lock wait. */
+
 void
 que_thr_stop_for_mysql_no_error(
 /*============================*/
@@ -1105,6 +1130,15 @@ que_thr_stop_for_mysql_no_error(
 {
 	ut_ad(thr->state == QUE_THR_RUNNING);
 		
+	if (thr->magic_n != QUE_THR_MAGIC_N) {
+		fprintf(stderr,
+	"que_thr struct appears corrupt; magic n %lu\n", thr->magic_n);
+
+		mem_analyze_corruption((byte*)thr);
+
+		ut_a(0);
+	}
+
 	thr->state = QUE_THR_COMPLETED;
 
 	thr->is_active = FALSE;
diff --git a/innobase/rem/rem0rec.c b/innobase/rem/rem0rec.c
index 749e19575bc..3889f62afa2 100644
--- a/innobase/rem/rem0rec.c
+++ b/innobase/rem/rem0rec.c
@@ -105,6 +105,17 @@ rec_get_nth_field(
 	ut_ad(rec && len);
 	ut_ad(n < rec_get_n_fields(rec));
 
+	if (n > 1024) {
+		fprintf(stderr, "Error: trying to access field %lu in rec\n",
+									n);
+		ut_a(0);
+	}
+
+	if (rec == NULL) {
+		fprintf(stderr, "Error: rec is NULL pointer\n");
+		ut_a(0);
+	}
+	
 	if (rec_get_1byte_offs_flag(rec)) {
 		os = rec_1_get_field_start_offs(rec, n);
 
diff --git a/innobase/row/row0mysql.c b/innobase/row/row0mysql.c
index 9622a7cee32..c0f527017e0 100644
--- a/innobase/row/row0mysql.c
+++ b/innobase/row/row0mysql.c
@@ -242,10 +242,14 @@ row_create_prebuilt(
 	ulint		ref_len;
 	ulint		i;
 	
+	dict_table_increment_handle_count(table);
+
 	heap = mem_heap_create(128);
 
 	prebuilt = mem_heap_alloc(heap, sizeof(row_prebuilt_t));
 
+	prebuilt->magic_n = ROW_PREBUILT_ALLOCATED;
+
 	prebuilt->table = table;
 
 	prebuilt->trx = NULL;
@@ -294,7 +298,7 @@ row_create_prebuilt(
 	prebuilt->blob_heap = NULL;
 
 	prebuilt->old_vers_heap = NULL;
-	
+
 	return(prebuilt);
 }
 
@@ -308,6 +312,19 @@ row_prebuilt_free(
 {
 	ulint	i;
 
+	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
+		fprintf(stderr,
+		"InnoDB: Error: trying to free a corrupt\n"
+		"InnoDB: table handle. Magic n %lu, table name %s\n",
+		prebuilt->magic_n, prebuilt->table->name);
+
+		mem_analyze_corruption((byte*)prebuilt);
+
+		ut_a(0);
+	}
+
+	prebuilt->magic_n = ROW_PREBUILT_FREED;
+
 	btr_pcur_free_for_mysql(prebuilt->pcur);
 	btr_pcur_free_for_mysql(prebuilt->clust_pcur);
 
@@ -341,6 +358,8 @@ row_prebuilt_free(
 		}
 	}
 
+	dict_table_decrement_handle_count(prebuilt->table);
+
 	mem_heap_free(prebuilt->heap);
 }
 
@@ -356,6 +375,28 @@ row_update_prebuilt_trx(
 					handle */
 	trx_t*		trx)		/* in: transaction handle */
 {	
+	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
+		fprintf(stderr,
+		"InnoDB: Error: trying to free a corrupt\n"
+		"InnoDB: table handle. Magic n %lu, table name %s\n",
+		prebuilt->magic_n, prebuilt->table->name);
+
+		mem_analyze_corruption((byte*)prebuilt);
+
+		ut_a(0);
+	}
+
+	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
+		fprintf(stderr,
+		"InnoDB: Error: trying to use a corrupt\n"
+		"InnoDB: table handle. Magic n %lu, table name %s\n",
+		prebuilt->magic_n, prebuilt->table->name);
+
+		mem_analyze_corruption((byte*)prebuilt);
+
+		ut_a(0);
+	}
+
 	prebuilt->trx = trx;
 
 	if (prebuilt->ins_graph) {
@@ -563,6 +604,17 @@ row_insert_for_mysql(
 	ut_ad(trx);
 	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
 	
+	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
+		fprintf(stderr,
+		"InnoDB: Error: trying to free a corrupt\n"
+		"InnoDB: table handle. Magic n %lu, table name %s\n",
+		prebuilt->magic_n, prebuilt->table->name);
+
+		mem_analyze_corruption((byte*)prebuilt);
+
+		ut_a(0);
+	}
+
 	if (srv_created_new_raw || srv_force_recovery) {
 		fprintf(stderr,
 		"InnoDB: A new raw disk partition was initialized or\n"
@@ -748,6 +800,17 @@ row_update_for_mysql(
 	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
 	UT_NOT_USED(mysql_rec);
 	
+	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
+		fprintf(stderr,
+		"InnoDB: Error: trying to free a corrupt\n"
+		"InnoDB: table handle. Magic n %lu, table name %s\n",
+		prebuilt->magic_n, prebuilt->table->name);
+
+		mem_analyze_corruption((byte*)prebuilt);
+
+		ut_a(0);
+	}
+
 	if (srv_created_new_raw || srv_force_recovery) {
 		fprintf(stderr,
 		"InnoDB: A new raw disk partition was initialized or\n"
@@ -782,38 +845,6 @@ row_update_for_mysql(
 	generated for the table: MySQL does not know anything about
 	the row id used as the clustered index key */
 
-#ifdef notdefined
-	/* We have to search for the correct cursor position */
-
-	ref_len = dict_index_get_n_unique(clust_index);
-
-	heap = mem_heap_create(450);
-
-	row_tuple = dtuple_create(heap, dict_table_get_n_cols(table));
-	dict_table_copy_types(row_tuple, table);
-
-	if (prebuilt->ins_upd_rec_buff == NULL) {
-		prebuilt->ins_upd_rec_buff = mem_heap_alloc(prebuilt->heap,
-						prebuilt->mysql_row_len);
-	}
-		
-	row_mysql_convert_row_to_innobase(row_tuple, prebuilt, mysql_rec);
-
-	search_tuple = dtuple_create(heap, ref_len);
-
-	row_build_row_ref_from_row(search_tuple, table, row_tuple);
-
-	mtr_start(&mtr);
-	
-	btr_pcur_open_with_no_init(clust_index, search_tuple, PAGE_CUR_LE,
-					BTR_SEARCH_LEAF, node->pcur, 0, &mtr);	
-
-	btr_pcur_store_position(node->pcur, &mtr);
-	
-	mtr_commit(&mtr);
-
-	mem_heap_free(heap);
-#endif
 	savept = trx_savept_take(trx);
 	
 	thr = que_fork_get_first_thr(prebuilt->upd_graph);
@@ -923,6 +954,50 @@ row_get_mysql_key_number_for_index(
 }
 
 /*************************************************************************
+Recovers an orphaned tmp table inside InnoDB by renaming it. In the table
+name #sql becomes rsql, and "_recover_innodb_tmp_table" is catenated to
+the end of name. table->name should be of the form
+"dbname/rsql..._recover_innodb_tmp_table". This renames a table whose
+name is "#sql..." */
+static
+int
+row_mysql_recover_tmp_table(
+/*========================*/
+				/* out: error code or DB_SUCCESS */
+	dict_table_t*	table,	/* in: table definition */
+	trx_t*		trx)	/* in: transaction handle */
+{
+	char*	ptr;
+	char	old_name[1000];
+
+	ut_memcpy(old_name, table->name, ut_strlen(table->name) + 1);
+
+	ptr = old_name;
+
+	for (;;) {
+		if (ptr >= old_name + ut_strlen(table->name) - 6) {
+			trx_commit_for_mysql(trx);
+
+			return(DB_ERROR);
+		}
+
+		if (0 == ut_memcmp(ptr, "/rsql", 5)) {
+			ptr++;
+			*ptr = '#';
+
+			break;
+		}
+
+		ptr++;
+	}
+
+	old_name[ut_strlen(table->name)
+			- ut_strlen("_recover_innodb_tmp_table")] = '\0';
+
+	return(row_rename_table_for_mysql(old_name, table->name, trx));
+}
+
+/*************************************************************************
 Does a table creation operation for MySQL. If the name of the created
 table ends to characters INNODB_MONITOR, then this also starts
 printing of monitor output by the master thread. */
@@ -976,6 +1051,24 @@ row_create_table_for_mysql(
 
 	namelen = ut_strlen(table->name);
 
+	keywordlen = ut_strlen("_recover_innodb_tmp_table");
+
+	if (namelen >= keywordlen
+		    && 0 == ut_memcmp(table->name + namelen - keywordlen,
+ 				"_recover_innodb_tmp_table", keywordlen)) {
+
+		/* MySQL prevents accessing of tables whose name begins
+		with #sql, that is temporary tables. If mysqld crashes in
+		the middle of an ALTER TABLE, we may get an orphaned
+		#sql-table in the tablespace. We have here a special
+		mechanism to recover such tables by renaming them to
+		rsql... */
+ 				
+		return(row_mysql_recover_tmp_table(table, trx));
+	}
+
+	namelen = ut_strlen(table->name);
+
 	keywordlen = ut_strlen("innodb_monitor");
 
 	if (namelen >= keywordlen
@@ -1118,6 +1211,8 @@ row_create_index_for_mysql(
 	ind_node_t*	node;
 	mem_heap_t*	heap;
 	que_thr_t*	thr;
+	ulint		namelen;
+	ulint		keywordlen;
 	ulint		err;
 	
 	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
@@ -1126,6 +1221,18 @@ row_create_index_for_mysql(
 
 	trx_start_if_not_started(trx);
 
+	namelen = ut_strlen(index->table_name);
+
+	keywordlen = ut_strlen("_recover_innodb_tmp_table");
+
+	if (namelen >= keywordlen
+		    && 0 == ut_memcmp(
+				index->table_name + namelen - keywordlen,
+ 				"_recover_innodb_tmp_table", keywordlen)) {
+
+		return(DB_SUCCESS);
+	}
+
 	/* Serialize data dictionary operations with dictionary mutex:
 	no deadlocks can occur then in these operations */
 
@@ -1189,6 +1296,8 @@ row_table_add_foreign_constraints(
 	char*	name)		/* in: table full name in the normalized form
 				database_name/table_name */
 {
+	ulint	namelen;
+	ulint	keywordlen;
 	ulint	err;
 
 	ut_a(sql_string);
@@ -1197,6 +1306,18 @@ row_table_add_foreign_constraints(
 
 	trx_start_if_not_started(trx);
 
+	namelen = ut_strlen(name);
+
+	keywordlen = ut_strlen("_recover_innodb_tmp_table");
+
+	if (namelen >= keywordlen
+		    && 0 == ut_memcmp(
+				name + namelen - keywordlen,
+ 				"_recover_innodb_tmp_table", keywordlen)) {
+
+		return(DB_SUCCESS);
+	}
+
 	/* Serialize data dictionary operations with dictionary mutex:
 	no deadlocks can occur then in these operations */
 
@@ -1251,6 +1372,7 @@ row_drop_table_for_mysql(
 	ulint		len;
 	ulint		namelen;
 	ulint		keywordlen;
+	ulint		rounds	= 0;
 	char		buf[10000];
 
 	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
@@ -1427,11 +1549,38 @@ row_drop_table_for_mysql(
 	/* Remove any locks there are on the table or its records */
 	
 	lock_reset_all_on_table(table);
+loop:
+	if (table->n_mysql_handles_opened > 0) {
+		rw_lock_s_unlock(&(purge_sys->purge_is_running));
+
+		rw_lock_x_unlock(&(dict_foreign_key_check_lock));
+
+		mutex_exit(&(dict_sys->mutex));
+
+		if (rounds > 60) {
+			fprintf(stderr,
+	"InnoDB: waiting for queries to table %s to end before dropping it\n",
+								name);
+		}
+		
+		os_thread_sleep(1000000);
+
+		mutex_enter(&(dict_sys->mutex));
+		
+		rw_lock_x_lock(&(dict_foreign_key_check_lock));
+
+		rw_lock_s_lock(&(purge_sys->purge_is_running));
 
-	/* TODO: check that MySQL prevents users from accessing the table
-	after this function row_drop_table_for_mysql has been called:
-	otherwise anyone with an open handle to the table could, for example,
-	come to read the table! Monty said that it prevents. */
+		rounds++;
+
+		if (rounds > 120) {
+			fprintf(stderr,
+"InnoDB: Warning: queries to table %s have not ended but we continue anyway\n",
+								name);
+		} else {
+			goto loop;
+		}
+	}
 
 	trx->dict_operation = TRUE;
 	trx->table_id = table->id;
diff --git a/innobase/row/row0sel.c b/innobase/row/row0sel.c
index 2cccc217621..663a544faac 100644
--- a/innobase/row/row0sel.c
+++ b/innobase/row/row0sel.c
@@ -2492,6 +2492,17 @@ row_search_for_mysql(
 	
 	ut_ad(sync_thread_levels_empty_gen(FALSE));
 	
+	if (prebuilt->magic_n != ROW_PREBUILT_ALLOCATED) {
+		fprintf(stderr,
+		"InnoDB: Error: trying to free a corrupt\n"
+		"InnoDB: table handle. Magic n %lu, table name %s\n",
+		prebuilt->magic_n, prebuilt->table->name);
+
+		mem_analyze_corruption((byte*)prebuilt);
+
+		ut_a(0);
+	}
+
 /*	printf("Match mode %lu\n search tuple ", match_mode);
 	dtuple_print(search_tuple);
 	
diff --git a/innobase/srv/srv0srv.c b/innobase/srv/srv0srv.c
index d77db335366..d75783fe425 100644
--- a/innobase/srv/srv0srv.c
+++ b/innobase/srv/srv0srv.c
@@ -50,6 +50,9 @@ Created 10/8/1995 Heikki Tuuri
 #include "dict0load.h"
 #include "srv0start.h"
 
+/* Buffer which can be used in printing fatal error messages */
+char	srv_fatal_errbuf[5000];
+
 /* The following counter is incremented whenever there is some user activity
 in the server */
 ulint	srv_activity_count	= 0;
@@ -132,6 +135,9 @@ lint	srv_conc_n_threads	= 0;	/* number of OS threads currently
 					thread increments this, but a thread
 					waiting for a lock decrements this
 					temporarily */
+ulint	srv_conc_n_waiting_threads = 0;	/* number of OS threads waiting in the
+					FIFO for a permission to enter InnoDB
+					*/
 
 typedef struct srv_conc_slot_struct	srv_conc_slot_t;
 struct srv_conc_slot_struct{
@@ -152,6 +158,11 @@ UT_LIST_BASE_NODE_T(srv_conc_slot_t)	srv_conc_queue;	/* queue of threads
 							waiting to get in */
 srv_conc_slot_t	srv_conc_slots[OS_THREAD_MAX_N];	/* array of wait
 							slots */
+
+/* Number of times a thread is allowed to enter InnoDB within the same
+SQL query after it has once got the ticket at srv_conc_enter_innodb */
+#define SRV_FREE_TICKETS_TO_ENTER	500
+
 /*-----------------------*/
 /* If the following is set TRUE then we do not run purge and insert buffer
 merge to completion before shutdown */
@@ -1627,6 +1638,8 @@ srv_general_init(void)
 	thr_local_init();
 }
 
+/*======================= InnoDB Server FIFO queue =======================*/
+
 /*************************************************************************
 Puts an OS thread to wait if there are too many concurrent threads
 (>= srv_thread_concurrency) inside InnoDB. The threads wait in a FIFO queue. */
@@ -1640,11 +1653,29 @@ srv_conc_enter_innodb(
 	srv_conc_slot_t*	slot;
 	ulint			i;
 
+	if (srv_thread_concurrency >= 500) {
+		/* Disable the concurrency check */
+	
+		return;
+	}
+
+	/* If trx has 'free tickets' to enter the engine left, then use one
+	such ticket */
+
+	if (trx->n_tickets_to_enter_innodb > 0) {
+		trx->n_tickets_to_enter_innodb--;
+
+		return;
+	}
+
 	os_fast_mutex_lock(&srv_conc_mutex);
 
 	if (srv_conc_n_threads < (lint)srv_thread_concurrency) {
-		srv_conc_n_threads++;
 
+		srv_conc_n_threads++;
+		trx->declared_to_be_inside_innodb = TRUE;
+		trx->n_tickets_to_enter_innodb = SRV_FREE_TICKETS_TO_ENTER;
+		
 		os_fast_mutex_unlock(&srv_conc_mutex);
 
 		return;
@@ -1665,6 +1696,8 @@ srv_conc_enter_innodb(
 		thread enter */
 
 		srv_conc_n_threads++;
+		trx->declared_to_be_inside_innodb = TRUE;
+		trx->n_tickets_to_enter_innodb = 0;
 
 		os_fast_mutex_unlock(&srv_conc_mutex);
 
@@ -1684,6 +1717,8 @@ srv_conc_enter_innodb(
 
 	os_event_reset(slot->event);
 
+	srv_conc_n_waiting_threads++;
+
 	os_fast_mutex_unlock(&srv_conc_mutex);
 
 	/* Go to wait for the event; when a thread leaves InnoDB it will
@@ -1693,6 +1728,8 @@ srv_conc_enter_innodb(
 
 	os_fast_mutex_lock(&srv_conc_mutex);
 
+	srv_conc_n_waiting_threads--;
+
 	/* NOTE that the thread which released this thread already
 	incremented the thread counter on behalf of this thread */
 
@@ -1700,6 +1737,9 @@ srv_conc_enter_innodb(
 
 	UT_LIST_REMOVE(srv_conc_queue, srv_conc_queue, slot);
 
+	trx->declared_to_be_inside_innodb = TRUE;
+	trx->n_tickets_to_enter_innodb = SRV_FREE_TICKETS_TO_ENTER;
+
 	os_fast_mutex_unlock(&srv_conc_mutex);
 }
 
@@ -1708,29 +1748,52 @@ This lets a thread enter InnoDB regardless of the number of threads inside
 InnoDB. This must be called when a thread ends a lock wait. */
 
 void
-srv_conc_force_enter_innodb(void)
-/*=============================*/
+srv_conc_force_enter_innodb(
+/*========================*/
+	trx_t*	trx)	/* in: transaction object associated with the
+			thread */
 {
+	if (srv_thread_concurrency >= 500) {
+	
+		return;
+	}
+
 	os_fast_mutex_lock(&srv_conc_mutex);
 
 	srv_conc_n_threads++;
+	trx->declared_to_be_inside_innodb = TRUE;
+	trx->n_tickets_to_enter_innodb = 0;
 
 	os_fast_mutex_unlock(&srv_conc_mutex);
 }
 
 /*************************************************************************
-This must be called when a thread exits InnoDB. This must also be called
-when a thread goes to wait for a lock. */
+This must be called when a thread exits InnoDB in a lock wait or at the
+end of an SQL statement. */
 
 void
-srv_conc_exit_innodb(void)
-/*======================*/
+srv_conc_force_exit_innodb(
+/*=======================*/
+	trx_t*	trx)	/* in: transaction object associated with the
+			thread */
 {
 	srv_conc_slot_t*	slot	= NULL;
 
+	if (srv_thread_concurrency >= 500) {
+	
+		return;
+	}
+
+	if (trx->declared_to_be_inside_innodb == FALSE) {
+		
+		return;
+	}
+
 	os_fast_mutex_lock(&srv_conc_mutex);
 
 	srv_conc_n_threads--;
+	trx->declared_to_be_inside_innodb = FALSE;
+	trx->n_tickets_to_enter_innodb = 0;
 
 	if (srv_conc_n_threads < (lint)srv_thread_concurrency) {
 		/* Look for a slot where a thread is waiting and no other
@@ -1760,6 +1823,38 @@ srv_conc_exit_innodb(void)
 }
 
 /*************************************************************************
+This must be called when a thread exits InnoDB. */
+
+void
+srv_conc_exit_innodb(
+/*=================*/
+	trx_t*	trx)	/* in: transaction object associated with the
+			thread */
+{
+	srv_conc_slot_t*	slot	= NULL;
+
+	if (srv_thread_concurrency >= 500) {
+	
+		return;
+	}
+
+	if (trx->n_tickets_to_enter_innodb > 0) {
+		/* We will pretend the thread is still inside InnoDB though it
+		now leaves the InnoDB engine. In this way we save
+		a lot of semaphore operations. srv_conc_force_exit_innodb is
+		used to declare the thread definitely outside InnoDB. It
+		should be called when there is a lock wait or an SQL statement
+		ends. */
+
+		return;
+	}
+
+	srv_conc_force_exit_innodb(trx);
+}
+
+/*========================================================================*/
+
+/*************************************************************************
 Normalizes init parameter values to use units we use inside InnoDB. */
 static
 ulint
@@ -1905,7 +2000,7 @@ srv_suspend_mysql_thread(
 	other thread holding a lock which this thread waits for must be
 	allowed to enter, sooner or later */
 	
-	srv_conc_exit_innodb();
+	srv_conc_force_exit_innodb(thr_get_trx(thr));
 
 	/* Wait for the release */
 	
@@ -1913,7 +2008,7 @@ srv_suspend_mysql_thread(
 
 	/* Return back inside InnoDB */
 	
-	srv_conc_force_enter_innodb();
+	srv_conc_force_enter_innodb(thr_get_trx(thr));
 
 	mutex_enter(&kernel_mutex);
 
@@ -2052,8 +2147,9 @@ loop:
 		       "ROW OPERATIONS\n"
 		       "--------------\n");
 		printf(
-	"%ld queries inside InnoDB; main thread: %s\n",
-				srv_conc_n_threads, srv_main_thread_op_info);
+	"%ld queries inside InnoDB, %ld queries in queue; main thread: %s\n",
+			srv_conc_n_threads, srv_conc_n_waiting_threads,
+			srv_main_thread_op_info);
 		printf(
 	"Number of rows inserted %lu, updated %lu, deleted %lu, read %lu\n",
 			srv_n_rows_inserted, 
@@ -2315,6 +2411,12 @@ loop:
 		srv_main_thread_op_info = "sleeping";
 		os_thread_sleep(1000000);
 
+		/* ALTER TABLE in MySQL requires on Unix that the table handler
+		can drop tables lazily after there no longer are SELECT
+		queries to them. */
+
+/*		row_drop_tables_for_mysql_in_background(); */
+
 		if (srv_force_recovery >= SRV_FORCE_NO_BACKGROUND) {
 
 			goto suspend_thread;
diff --git a/innobase/sync/sync0arr.c b/innobase/sync/sync0arr.c
index c41754316d0..7788b104120 100644
--- a/innobase/sync/sync0arr.c
+++ b/innobase/sync/sync0arr.c
@@ -913,6 +913,17 @@ sync_array_print_long_waits(void)
 
 			noticed = TRUE;
                 }
+
+                if (cell->wait_object != NULL
+		    && difftime(time(NULL), cell->reservation_time) > 420) {
+
+		    	fprintf(stderr,
+"InnoDB: Error: semaphore wait has lasted > 420 seconds\n"
+"InnoDB: We intentionally crash the server, because it appears to be hung.\n"
+		    	);
+
+		    	ut_a(0);
+                }
        	}
 
 	if (noticed) {
diff --git a/innobase/trx/trx0sys.c b/innobase/trx/trx0sys.c
index e79e4594637..b29ffb4b3bf 100644
--- a/innobase/trx/trx0sys.c
+++ b/innobase/trx/trx0sys.c
@@ -389,6 +389,115 @@ trx_sys_flush_max_trx_id(void)
 	mtr_commit(&mtr);
 }
 
+/*********************************************************************
+Updates the offset information about the end of the MySQL binlog entry
+which corresponds to the transaction just being committed. */
+
+void
+trx_sys_update_mysql_binlog_offset(
+/*===============================*/
+	trx_t*	trx,	/* in: transaction being committed */
+	mtr_t*	mtr)	/* in: mtr */
+{
+	trx_sysf_t*	sys_header;
+	char		namebuf[TRX_SYS_MYSQL_LOG_NAME_LEN];
+	
+	ut_ad(mutex_own(&kernel_mutex));
+	ut_ad(trx->mysql_log_file_name);
+
+	memset(namebuf, ' ', TRX_SYS_MYSQL_LOG_NAME_LEN - 1);
+	namebuf[TRX_SYS_MYSQL_LOG_NAME_LEN - 1] = '\0';
+
+	/* Copy the whole MySQL log file name to the buffer, or only the
+	last characters, if it does not fit */
+
+	if (ut_strlen(trx->mysql_log_file_name)
+			> TRX_SYS_MYSQL_LOG_NAME_LEN - 1) {
+		ut_memcpy(namebuf, trx->mysql_log_file_name
+			+ ut_strlen(trx->mysql_log_file_name)
+			- (TRX_SYS_MYSQL_LOG_NAME_LEN - 1),
+			TRX_SYS_MYSQL_LOG_NAME_LEN - 1);
+	} else {
+		ut_memcpy(namebuf, trx->mysql_log_file_name,
+				1 + ut_strlen(trx->mysql_log_file_name));
+	}
+
+	namebuf[TRX_SYS_MYSQL_LOG_NAME_LEN - 1] = '\0';
+
+	sys_header = trx_sysf_get(mtr);
+
+	if (mach_read_from_4(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD)
+	   != TRX_SYS_MYSQL_LOG_MAGIC_N) {
+
+	   	mlog_write_ulint(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD,
+				TRX_SYS_MYSQL_LOG_MAGIC_N,
+				MLOG_4BYTES, mtr);
+	}
+
+	if (0 != ut_memcmp(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_NAME,
+			 namebuf, TRX_SYS_MYSQL_LOG_NAME_LEN)) {
+
+		mlog_write_string(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_NAME,
+				namebuf, TRX_SYS_MYSQL_LOG_NAME_LEN, mtr);
+	}
+
+	if (mach_read_from_4(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH) > 0
+	   || (trx->mysql_log_offset >> 32) > 0) {
+				
+		mlog_write_ulint(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH,
+				(ulint)(trx->mysql_log_offset >> 32),
+				MLOG_4BYTES, mtr);
+	}
+
+	mlog_write_ulint(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_OFFSET_LOW,
+				(ulint)(trx->mysql_log_offset & 0xFFFFFFFF),
+				MLOG_4BYTES, mtr);				
+
+	trx->mysql_log_file_name = NULL;
+}
+
+/*********************************************************************
+Prints to stderr the MySQL binlog offset info in the trx system header if
+the magic number shows it valid. */
+
+void
+trx_sys_print_mysql_binlog_offset(void)
+/*===================================*/
+{
+	trx_sysf_t*	sys_header;
+	mtr_t		mtr;
+	
+	mtr_start(&mtr);
+
+	sys_header = trx_sysf_get(&mtr);
+
+	if (mach_read_from_4(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD)
+	   != TRX_SYS_MYSQL_LOG_MAGIC_N) {
+
+		mtr_commit(&mtr);
+
+		return;
+	}
+
+	fprintf(stderr,
+	"InnoDB: Last MySQL binlog file offset %lu %lu, file name %s\n",
+		mach_read_from_4(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH),
+		mach_read_from_4(sys_header + TRX_SYS_MYSQL_LOG_INFO
+					+ TRX_SYS_MYSQL_LOG_OFFSET_LOW),
+		sys_header + TRX_SYS_MYSQL_LOG_INFO + TRX_SYS_MYSQL_LOG_NAME);
+
+	mtr_commit(&mtr);
+}
+
 /********************************************************************
 Looks for a free slot for a rollback segment in the trx system file copy. */
 
@@ -519,7 +628,7 @@ trx_sys_init_at_db_start(void)
 	"InnoDB: %lu uncommitted transaction(s) which must be rolled back\n",
 				UT_LIST_GET_LEN(trx_sys->trx_list));
 
-		fprintf(stderr, "Trx id counter is %lu %lu\n", 
+		fprintf(stderr, "InnoDB: Trx id counter is %lu %lu\n", 
 			ut_dulint_get_high(trx_sys->max_trx_id),
 			ut_dulint_get_low(trx_sys->max_trx_id));
 	}
diff --git a/innobase/trx/trx0trx.c b/innobase/trx/trx0trx.c
index 18c80819245..43cca5b62b3 100644
--- a/innobase/trx/trx0trx.c
+++ b/innobase/trx/trx0trx.c
@@ -76,6 +76,9 @@ trx_create(
 	trx->n_mysql_tables_in_use = 0;
 	trx->mysql_n_tables_locked = 0;
 
+	trx->mysql_log_file_name = NULL;
+	trx->mysql_log_offset = 0;
+	
 	trx->ignore_duplicates_in_insert = FALSE;
 
 	mutex_create(&(trx->undo_mutex));
@@ -111,6 +114,9 @@ trx_create(
 	trx->has_search_latch = FALSE;
 	trx->search_latch_timeout = BTR_SEA_TIMEOUT;
 
+	trx->declared_to_be_inside_innodb = FALSE;
+	trx->n_tickets_to_enter_innodb = 0;
+
 	trx->auto_inc_lock = NULL;
 	
 	trx->read_view_heap = mem_heap_create(256);
@@ -568,6 +574,13 @@ trx_commit_off_kernel(
 
 		mutex_exit(&(rseg->mutex));
 
+		/* Update the latest MySQL binlog name and offset info
+		in trx sys header if MySQL binlogging is on */
+
+		if (trx->mysql_log_file_name) {
+			trx_sys_update_mysql_binlog_offset(trx, &mtr);
+		}
+		
 		/* If we did not take the shortcut, the following call
 		commits the mini-transaction, making the whole transaction
 		committed in the file-based world at this log sequence number;
diff --git a/innobase/trx/trx0undo.c b/innobase/trx/trx0undo.c
index 8b83163bfc2..b5341871228 100644
--- a/innobase/trx/trx0undo.c
+++ b/innobase/trx/trx0undo.c
@@ -1310,9 +1310,10 @@ trx_undo_mem_init_for_reuse(
 {
 	ut_ad(mutex_own(&((undo->rseg)->mutex)));
 	
-	if (undo->id >= TRX_RSEG_N_SLOTS) {
-		fprintf(stderr,
-		"InnoDB: Error: undo->id is %lu\n", undo->id);
+ 	if (undo->id >= TRX_RSEG_N_SLOTS) {
+		fprintf(stderr, "InnoDB: Error: undo->id is %lu\n", undo->id);
+
+		mem_analyze_corruption((byte*)undo);
 		ut_a(0);
 	}
 
@@ -1399,7 +1400,7 @@ trx_undo_create(
 
 /************************************************************************
 Reuses a cached undo log. */
-UNIV_INLINE
+static
 trx_undo_t*
 trx_undo_reuse_cached(
 /*==================*/
@@ -1442,6 +1443,12 @@ trx_undo_reuse_cached(
 	ut_ad(undo->size == 1);
 	ut_ad(undo->hdr_page_no == undo->top_page_no);
 
+	if (undo->id >= TRX_RSEG_N_SLOTS) {
+		fprintf(stderr, "InnoDB: Error: undo->id is %lu\n", undo->id);
+		mem_analyze_corruption((byte*)undo);
+		ut_a(0);
+	}
+
 	undo_page = trx_undo_page_get(undo->space, undo->hdr_page_no, mtr);
 
 	if (type == TRX_UNDO_INSERT) {
@@ -1572,8 +1579,8 @@ trx_undo_set_state_at_finish(
 	ut_ad(trx && undo && mtr);
 
 	if (undo->id >= TRX_RSEG_N_SLOTS) {
-		fprintf(stderr,
-		"InnoDB: Error: undo->id is %lu\n", undo->id);
+		fprintf(stderr, "InnoDB: Error: undo->id is %lu\n", undo->id);
+		mem_analyze_corruption((byte*)undo);
 		ut_a(0);
 	}