Bug#16263506 - INNODB; USE ABORT() ON ALL PLATFORMS INSTEAD OF

               DEREFERENCING UT_DBG_NULL_PTR
The abort() call is standard C but InnoDB only uses it in GCC
environments.  UT_DBG_USE_ABORT is not defined the code crashed
by dereferencing a null pointer instead of calling abort().
Other code throughout MySQL including ndb, sql, mysys and other
places call abort() directly.

This bug also affects innodb.innodb_bug14147491.test which fails
randomly on windows because of this issue. 

Approved by marko in http://rb.no.oracle.com/rb/r/1936/

storage/innobase/include/ut0dbg.h

@@ -55,47 +55,8 @@ ut_dbg_assertion_failed(
 	ulint		line)	/*!< in: line number of the assertion */
 	UNIV_COLD __attribute__((nonnull(2)));
 
-#if defined(__WIN__) || defined(__INTEL_COMPILER)
-# undef UT_DBG_USE_ABORT
-#elif defined(__GNUC__) && (__GNUC__ > 2)
-# define UT_DBG_USE_ABORT
-#endif
-
-#ifndef UT_DBG_USE_ABORT
-/** A null pointer that will be dereferenced to trigger a memory trap */
-extern ulint*	ut_dbg_null_ptr;
-#endif
-
-#if defined(UNIV_SYNC_DEBUG) || !defined(UT_DBG_USE_ABORT)
-/** If this is set to TRUE by ut_dbg_assertion_failed(), all threads
-will stop at the next ut_a() or ut_ad(). */
-extern ibool	ut_dbg_stop_threads;
-
-/*************************************************************//**
-Stop a thread after assertion failure. */
-UNIV_INTERN
-void
-ut_dbg_stop_thread(
-/*===============*/
-	const char*	file,
-	ulint		line);
-#endif
-
-#ifdef UT_DBG_USE_ABORT
 /** Abort the execution. */
 # define UT_DBG_PANIC abort()
-/** Stop threads (null operation) */
-# define UT_DBG_STOP do {} while (0)
-#else /* UT_DBG_USE_ABORT */
-/** Abort the execution. */
-# define UT_DBG_PANIC					\
-	if (*(ut_dbg_null_ptr)) ut_dbg_null_ptr = NULL
-/** Stop threads in ut_a(). */
-# define UT_DBG_STOP do						\
-	if (UNIV_UNLIKELY(ut_dbg_stop_threads)) {		\
-		ut_dbg_stop_thread(__FILE__, (ulint) __LINE__);	\
-	} while (0)
-#endif /* UT_DBG_USE_ABORT */
 
 /** Abort execution if EXPR does not evaluate to nonzero.
 @param EXPR	assertion expression that should hold */
@@ -105,7 +66,6 @@ ut_dbg_stop_thread(
 				__FILE__, (ulint) __LINE__);	\
 		UT_DBG_PANIC;					\
 	}							\
-	UT_DBG_STOP;						\
 } while (0)
 
 /** Abort execution. */

storage/innobase/sync/sync0arr.c

@@ -604,10 +604,6 @@ sync_array_deadlock_step(
 	new = sync_array_find_thread(arr, thread);
 
 	if (UNIV_UNLIKELY(new == start)) {
-		/* Stop running of other threads */
-
-		ut_dbg_stop_threads = TRUE;
-
 		/* Deadlock */
 		fputs("########################################\n"
 		      "DEADLOCK of threads detected!\n", stderr);

storage/innobase/ut/ut0dbg.c

@@ -35,16 +35,6 @@ Created 1/30/1994 Heikki Tuuri
 UNIV_INTERN ulint	ut_dbg_zero	= 0;
 #endif
 
-#if defined(UNIV_SYNC_DEBUG) || !defined(UT_DBG_USE_ABORT)
-/** If this is set to TRUE by ut_dbg_assertion_failed(), all threads
-will stop at the next ut_a() or ut_ad(). */
-UNIV_INTERN ibool	ut_dbg_stop_threads	= FALSE;
-#endif
-#ifndef UT_DBG_USE_ABORT
-/** A null pointer that will be dereferenced to trigger a memory trap */
-UNIV_INTERN ulint*	ut_dbg_null_ptr		= NULL;
-#endif
-
 /*************************************************************//**
 Report a failed assertion. */
 UNIV_INTERN
@@ -80,30 +70,8 @@ ut_dbg_assertion_failed(
 	      "InnoDB: corruption in the InnoDB tablespace. Please refer to\n"
 	      "InnoDB: " REFMAN "forcing-innodb-recovery.html\n"
 	      "InnoDB: about forcing recovery.\n", stderr);
-#if defined(UNIV_SYNC_DEBUG) || !defined(UT_DBG_USE_ABORT)
-	ut_dbg_stop_threads = TRUE;
-#endif
 }
 
-#if defined(UNIV_SYNC_DEBUG) || !defined(UT_DBG_USE_ABORT)
-/*************************************************************//**
-Stop a thread after assertion failure. */
-UNIV_INTERN
-void
-ut_dbg_stop_thread(
-/*===============*/
-	const char*	file,
-	ulint		line)
-{
-#ifndef UNIV_HOTBACKUP
-	fprintf(stderr, "InnoDB: Thread %lu stopped in file %s line %lu\n",
-		os_thread_pf(os_thread_get_curr_id()),
-		innobase_basename(file), line);
-	os_thread_sleep(1000000000);
-#endif /* !UNIV_HOTBACKUP */
-}
-#endif
-
 #ifdef UNIV_COMPILE_TEST_FUNCS
 
 #include <sys/types.h>