HDFFV-10398 avoid sanitizer failures

1 files changed, 527 insertions, 511 deletions

diff --git a/src/H5detect.c b/src/H5detect.c
index 75a1dba..2cc8366 100644
--- a/src/H5detect.c
+++ b/src/H5detect.c
@@ -27,23 +27,23 @@ static const char *FileHeader = "\n\
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *";
 /*
  *
- * Created:	H5detect.c
- *		10 Aug 1997
- *		Robb Matzke
+ * Created:    H5detect.c
+ *        10 Aug 1997
+ *        Robb Matzke
  *
- * Purpose:	This code was borrowed heavily from the `detect.c'
- *		program in the AIO distribution from Lawrence
- *		Livermore National Laboratory.
+ * Purpose:    This code was borrowed heavily from the `detect.c'
+ *        program in the AIO distribution from Lawrence
+ *        Livermore National Laboratory.
  *
- *		Detects machine byte order and floating point
- *		format and generates a C source file (H5Tinit.c)
- *		to describe those paramters.
+ *        Detects machine byte order and floating point
+ *        format and generates a C source file (H5Tinit.c)
+ *        to describe those paramters.
  *
  * Assumptions: We have an ANSI compiler.  We're on a Unix like
- *		system or configure has detected those Unix
- *		features which aren't available.  We're not
- *		running on a Vax or other machine with mixed
- *		endianess.
+ *        system or configure has detected those Unix
+ *        features which aren't available.  We're not
+ *        running on a Vax or other machine with mixed
+ *        endianess.
  *
  * Modifications:
  *
@@ -54,9 +54,19 @@ static const char *FileHeader = "\n\
 #include "H5Tpublic.h"
 #include "H5Rpublic.h"
 
+#if defined(__has_attribute)
+#if __has_attribute(no_sanitize)
+#define HDF_NO_UBSAN __attribute__((no_sanitize("undefined")))
+#else
+#define HDF_NO_UBSAN
+#endif
+#else
+#define HDF_NO_UBSAN
+#endif
+
 #define MAXDETECT 64
 
-/* The ALIGNMENT test code may generate the SIGBUS, SIGSEGV, or SIGILL signals. 
+/* The ALIGNMENT test code may generate the SIGBUS, SIGSEGV, or SIGILL signals.
  * We use setjmp/longjmp in the signal handlers for recovery. But setjmp/longjmp
  * do not necessary restore the signal blocking status while sigsetjmp/siglongjmp
  * do. If sigsetjmp/siglongjmp are not supported, need to use sigprocmask to
@@ -66,19 +76,19 @@ static const char *FileHeader = "\n\
 /* supported. */
 #if defined(H5_HAVE_SIGSETJMP) && defined(H5_HAVE_SIGLONGJMP)
 /* Always save blocked signals to be restore by siglongjmp. */
-#define H5JMP_BUF	sigjmp_buf
-#define H5SETJMP(buf)	HDsigsetjmp(buf, 1)
-#define H5LONGJMP(buf, val)	HDsiglongjmp(buf, val)
-#define H5HAVE_SIGJMP		/* sigsetjmp/siglongjmp are supported. */
+#define H5JMP_BUF    sigjmp_buf
+#define H5SETJMP(buf)    HDsigsetjmp(buf, 1)
+#define H5LONGJMP(buf, val)    HDsiglongjmp(buf, val)
+#define H5HAVE_SIGJMP        /* sigsetjmp/siglongjmp are supported. */
 #elif defined(H5_HAVE_LONGJMP)
-#define H5JMP_BUF	jmp_buf
-#define H5SETJMP(buf)	HDsetjmp(buf)
-#define H5LONGJMP(buf, val)	HDlongjmp(buf, val)
+#define H5JMP_BUF    jmp_buf
+#define H5SETJMP(buf)    HDsetjmp(buf)
+#define H5LONGJMP(buf, val)    HDlongjmp(buf, val)
 #endif
 
 /* ALIGNMENT and signal-handling status codes */
-#define STA_NoALIGNMENT		0x0001  /* No ALIGNMENT Test */
-#define STA_NoHandlerVerify	0x0002  /* No signal handler Tests */
+#define STA_NoALIGNMENT        0x0001  /* No ALIGNMENT Test */
+#define STA_NoHandlerVerify    0x0002  /* No signal handler Tests */
 
 
 /*
@@ -133,11 +143,11 @@ static void detect_C99_integers32(void);
 static void detect_C99_integers64(void);
 static void detect_alignments(void);
 static unsigned int align_g[] = {1, 2, 4, 8, 16};
-static int align_status_g = 0;		/* ALIGNMENT Signal Status */
-static int sigbus_handler_called_g = 0;	/* how many times called */
+static int align_status_g = 0;        /* ALIGNMENT Signal Status */
+static int sigbus_handler_called_g = 0;    /* how many times called */
 static int sigsegv_handler_called_g = 0;/* how many times called */
-static int sigill_handler_called_g = 0;	/* how many times called */
-static int signal_handler_tested_g = 0;	/* how many times tested */
+static int sigill_handler_called_g = 0;    /* how many times called */
+static int signal_handler_tested_g = 0;    /* how many times tested */
 #if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
 static int verify_signal_handlers(int signum, void (*handler)(int));
 #endif
@@ -145,16 +155,16 @@ static int verify_signal_handlers(int signum, void (*handler)(int));
 static H5JMP_BUF jbuf_g;
 #endif
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	precision
+ * Function:    precision
  *
- * Purpose:	Determine the precision and offset.
+ * Purpose:    Determine the precision and offset.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		Thursday, June 18, 1998
+ * Programmer:    Robb Matzke
+ *        Thursday, June 18, 1998
  *
  * Modifications:
  *
@@ -167,7 +177,7 @@ precision (detected_t *d)
 
     if (0 == d->msize) {
         /*
-         * An integer.	The permutation can have negative values at the
+         * An integer.    The permutation can have negative values at the
          * beginning or end which represent padding of bytes.  We must adjust
          * the precision and offset accordingly.
          */
@@ -201,36 +211,36 @@ precision (detected_t *d)
     }
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	DETECT_I/DETECT_BYTE
+ * Function:    DETECT_I/DETECT_BYTE
  *
- * Purpose:	These macro takes a type like `int' and a base name like
- *		`nati' and detects the byte order.  The VAR is used to
- *		construct the names of the C variables defined.
+ * Purpose:    These macro takes a type like `int' and a base name like
+ *        `nati' and detects the byte order.  The VAR is used to
+ *        construct the names of the C variables defined.
  *
  *              DETECT_I is used for types that are larger than one byte,
  *              DETECT_BYTE is used for types that are exactly one byte.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 12 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 12 1996
  *
  * Modifications:
  *
- *	Robb Matzke, 4 Nov 1996
- *	The INFO.perm now contains `-1' for bytes that aren't used and
- *	are always zero.  This happens on the Cray for `short' where
- *	sizeof(short) is 8, but only the low-order 4 bytes are ever used.
+ *    Robb Matzke, 4 Nov 1996
+ *    The INFO.perm now contains `-1' for bytes that aren't used and
+ *    are always zero.  This happens on the Cray for `short' where
+ *    sizeof(short) is 8, but only the low-order 4 bytes are ever used.
  *
- *	Robb Matzke, 4 Nov 1996
- *	Added a `padding' field to indicate how many zero bytes appear to
- *	the left (N) or right (-N) of the value.
+ *    Robb Matzke, 4 Nov 1996
+ *    Added a `padding' field to indicate how many zero bytes appear to
+ *    the left (N) or right (-N) of the value.
  *
- *	Robb Matzke, 5 Nov 1996
- *	Removed HFILE and CFILE arguments.
+ *    Robb Matzke, 5 Nov 1996
+ *    Removed HFILE and CFILE arguments.
  *
  *      Neil Fortner, 6 Sep 2013
  *      Split macro into DETECT_I and DETECT_BYTE macros, extracted
@@ -273,27 +283,27 @@ precision (detected_t *d)
     DETECT_I_BYTE_CORE(TYPE,VAR,INFO,int)                                     \
 }
 
-#define DETECT_I(TYPE,VAR,INFO) {					      \
+#define DETECT_I(TYPE,VAR,INFO) {                          \
     HDcompile_assert(sizeof(TYPE) > 1);                                       \
                                                                               \
     DETECT_I_BYTE_CORE(TYPE,VAR,INFO,TYPE)                                    \
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	DETECT_F
+ * Function:    DETECT_F
  *
- * Purpose:	This macro takes a floating point type like `double' and
- *		a base name like `natd' and detects byte order, mantissa
- *		location, exponent location, sign bit location, presence or
- *		absence of implicit mantissa bit, and exponent bias and
- *		initializes a detected_t structure with those properties.
+ * Purpose:    This macro takes a floating point type like `double' and
+ *        a base name like `natd' and detects byte order, mantissa
+ *        location, exponent location, sign bit location, presence or
+ *        absence of implicit mantissa bit, and exponent bias and
+ *        initializes a detected_t structure with those properties.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 12 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 12 1996
  *
  *-------------------------------------------------------------------------
  */
@@ -383,31 +393,31 @@ precision (detected_t *d)
     }                                                                         \
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	DETECT_M
+ * Function:    DETECT_M
  *
- * Purpose:	This macro takes only miscellaneous structures or pointer
+ * Purpose:    This macro takes only miscellaneous structures or pointer
  *              (pointer, hvl_t, hobj_ref_t, hdset_reg_ref_t).  It
- *		constructs the names and decides the alignment in structure.
+ *        constructs the names and decides the alignment in structure.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Raymond Lu
- *		slu@ncsa.uiuc.edu
- *		Dec 9, 2002
+ * Programmer:    Raymond Lu
+ *        slu@ncsa.uiuc.edu
+ *        Dec 9, 2002
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
-#define DETECT_M(TYPE,VAR,INFO) {					      \
-   INFO.name = #VAR;							      \
-   COMP_ALIGNMENT(TYPE, INFO.comp_align);				      \
+#define DETECT_M(TYPE,VAR,INFO) {                          \
+   INFO.name = #VAR;                                  \
+   COMP_ALIGNMENT(TYPE, INFO.comp_align);                      \
 }
 
 /* Detect alignment for C structure */
-#define COMP_ALIGNMENT(TYPE,COMP_ALIGN) {			              \
+#define COMP_ALIGNMENT(TYPE,COMP_ALIGN) {                          \
     struct {                                                                  \
         char    c;                                                            \
         TYPE    x;                                                            \
@@ -417,67 +427,67 @@ precision (detected_t *d)
 }
 
 #if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
-#define ALIGNMENT(TYPE,INFO) {						      \
-    char *volatile _buf = NULL;   					      \
-    TYPE _val = 1, _val2;						      \
-    volatile size_t	_ano = 0;					      \
-    void		(*_handler)(int) = HDsignal(SIGBUS, sigbus_handler);  \
-    void		(*_handler2)(int) = HDsignal(SIGSEGV, sigsegv_handler);\
-    void		(*_handler3)(int) = HDsignal(SIGILL, sigill_handler);  \
-									      \
-    _buf = (char*)HDmalloc(sizeof(TYPE) + align_g[NELMTS(align_g) - 1]);	      \
-    if(H5SETJMP(jbuf_g)) _ano++;					      \
-    if(_ano < NELMTS(align_g)) {					      \
-	*((TYPE*)(_buf+align_g[_ano])) = _val; /*possible SIGBUS or SEGSEGV*/ \
-	_val2 = *((TYPE*)(_buf+align_g[_ano]));	/*possible SIGBUS or SEGSEGV*/\
-	/* Cray Check: This section helps detect alignment on Cray's */	      \
+#define ALIGNMENT(TYPE,INFO) {                              \
+    char *volatile _buf = NULL;                             \
+    TYPE _val = 1, _val2;                              \
+    volatile size_t    _ano = 0;                          \
+    void        (*_handler)(int) = HDsignal(SIGBUS, sigbus_handler);  \
+    void        (*_handler2)(int) = HDsignal(SIGSEGV, sigsegv_handler);\
+    void        (*_handler3)(int) = HDsignal(SIGILL, sigill_handler);  \
+                                        \
+    _buf = (char*)HDmalloc(sizeof(TYPE) + align_g[NELMTS(align_g) - 1]);          \
+    if(H5SETJMP(jbuf_g)) _ano++;                          \
+    if(_ano < NELMTS(align_g)) {                          \
+    *((TYPE*)(_buf+align_g[_ano])) = _val; /*possible SIGBUS or SEGSEGV*/ \
+    _val2 = *((TYPE*)(_buf+align_g[_ano]));    /*possible SIGBUS or SEGSEGV*/\
+    /* Cray Check: This section helps detect alignment on Cray's */          \
         /*              vector machines (like the SV1) which mask off */      \
-	/*              pointer values when pointing to non-word aligned */   \
-	/*              locations with pointers that are supposed to be */    \
-	/*              word aligned. -QAK */                                 \
-	HDmemset(_buf, 0xff, sizeof(TYPE)+align_g[NELMTS(align_g)-1]);	      \
+    /*              pointer values when pointing to non-word aligned */   \
+    /*              locations with pointers that are supposed to be */    \
+    /*              word aligned. -QAK */                                 \
+    HDmemset(_buf, 0xff, sizeof(TYPE)+align_g[NELMTS(align_g)-1]);          \
         /*How to handle VAX types?*/                                          \
-	if(INFO.perm[0]) /* Big-Endian */				      \
-	    HDmemcpy(_buf+align_g[_ano]+(INFO.size-((INFO.offset+INFO.precision)/8)),((char *)&_val)+(INFO.size-((INFO.offset+INFO.precision)/8)),(size_t)(INFO.precision/8)); \
-	else /* Little-Endian */					      \
-	    HDmemcpy(_buf+align_g[_ano]+(INFO.offset/8),((char *)&_val)+(INFO.offset/8),(size_t)(INFO.precision/8)); \
-	_val2 = *((TYPE*)(_buf+align_g[_ano]));				      \
-    H5_GCC_DIAG_OFF(float-equal)					      \
-	if(_val!=_val2)							      \
-	    H5LONGJMP(jbuf_g, 1);		        		      \
-    H5_GCC_DIAG_ON(float-equal) 					      \
-	/* End Cray Check */						      \
-	(INFO.align)=align_g[_ano];					      \
-    } else {								      \
-	(INFO.align)=0;							      \
-	fprintf(stderr, "unable to calculate alignment for %s\n", #TYPE);     \
-    }									      \
-    HDfree(_buf);								      \
-    HDsignal(SIGBUS, _handler); /*restore original handler*/		      \
-    HDsignal(SIGSEGV, _handler2); /*restore original handler*/		      \
-    HDsignal(SIGILL, _handler3); /*restore original handler*/		      \
+    if(INFO.perm[0]) /* Big-Endian */                      \
+        HDmemcpy(_buf+align_g[_ano]+(INFO.size-((INFO.offset+INFO.precision)/8)),((char *)&_val)+(INFO.size-((INFO.offset+INFO.precision)/8)),(size_t)(INFO.precision/8)); \
+    else /* Little-Endian */                          \
+        HDmemcpy(_buf+align_g[_ano]+(INFO.offset/8),((char *)&_val)+(INFO.offset/8),(size_t)(INFO.precision/8)); \
+    _val2 = *((TYPE*)(_buf+align_g[_ano]));                      \
+    H5_GCC_DIAG_OFF(float-equal)                          \
+    if(_val!=_val2)                                  \
+        H5LONGJMP(jbuf_g, 1);                              \
+    H5_GCC_DIAG_ON(float-equal)                           \
+    /* End Cray Check */                              \
+    (INFO.align)=align_g[_ano];                          \
+    } else {                                      \
+    (INFO.align)=0;                                  \
+    fprintf(stderr, "unable to calculate alignment for %s\n", #TYPE);     \
+    }                                          \
+    HDfree(_buf);                                      \
+    HDsignal(SIGBUS, _handler); /*restore original handler*/              \
+    HDsignal(SIGSEGV, _handler2); /*restore original handler*/              \
+    HDsignal(SIGILL, _handler3); /*restore original handler*/              \
 }
 #else
-#define ALIGNMENT(TYPE,INFO) {						      \
-    align_status_g |= STA_NoALIGNMENT;					      \
-    (INFO.align)=0;							      \
+#define ALIGNMENT(TYPE,INFO) {                              \
+    align_status_g |= STA_NoALIGNMENT;                          \
+    (INFO.align)=0;                                  \
 }
 #endif
 
-
+
 #if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 /*-------------------------------------------------------------------------
- * Function:	sigsegv_handler
+ * Function:    sigsegv_handler
  *
- * Purpose:	Handler for SIGSEGV. We use signal() instead of sigaction()
- *		because it's more portable to non-Posix systems. Although
- *		it's not nearly as nice to work with, it does the job for
- *		this simple stuff.
+ * Purpose:    Handler for SIGSEGV. We use signal() instead of sigaction()
+ *        because it's more portable to non-Posix systems. Although
+ *        it's not nearly as nice to work with, it does the job for
+ *        this simple stuff.
  *
- * Return:	Returns via H5LONGJMP to jbuf_g.
+ * Return:    Returns via H5LONGJMP to jbuf_g.
  *
- * Programmer:	Robb Matzke
- *		Thursday, March 18, 1999
+ * Programmer:    Robb Matzke
+ *        Thursday, March 18, 1999
  *
  * Modifications:
  *
@@ -502,20 +512,20 @@ sigsegv_handler(int H5_ATTR_UNUSED signo)
 }
 #endif
 
-
+
 #if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 /*-------------------------------------------------------------------------
- * Function:	sigbus_handler
+ * Function:    sigbus_handler
  *
- * Purpose:	Handler for SIGBUS. We use signal() instead of sigaction()
- *		because it's more portable to non-Posix systems. Although
- *		it's not nearly as nice to work with, it does the job for
- *		this simple stuff.
+ * Purpose:    Handler for SIGBUS. We use signal() instead of sigaction()
+ *        because it's more portable to non-Posix systems. Although
+ *        it's not nearly as nice to work with, it does the job for
+ *        this simple stuff.
  *
- * Return:	Returns via H5LONGJMP to jbuf_g.
+ * Return:    Returns via H5LONGJMP to jbuf_g.
  *
- * Programmer:	Robb Matzke
- *		Thursday, March 18, 1999
+ * Programmer:    Robb Matzke
+ *        Thursday, March 18, 1999
  *
  * Modifications:
  *
@@ -540,20 +550,20 @@ sigbus_handler(int H5_ATTR_UNUSED signo)
 }
 #endif
 
-
+
 #if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 /*-------------------------------------------------------------------------
- * Function:	sigill_handler
+ * Function:    sigill_handler
  *
- * Purpose:	Handler for SIGILL. We use signal() instead of sigaction()
- *		because it's more portable to non-Posix systems. Although
- *		it's not nearly as nice to work with, it does the job for
- *		this simple stuff.
+ * Purpose:    Handler for SIGILL. We use signal() instead of sigaction()
+ *        because it's more portable to non-Posix systems. Although
+ *        it's not nearly as nice to work with, it does the job for
+ *        this simple stuff.
  *
- * Return:	Returns via H5LONGJMP to jbuf_g.
+ * Return:    Returns via H5LONGJMP to jbuf_g.
  *
- * Programmer:	Raymond Lu
- *		28 October 2013
+ * Programmer:    Raymond Lu
+ *        28 October 2013
  *
  *-------------------------------------------------------------------------
  */
@@ -576,17 +586,17 @@ sigill_handler(int H5_ATTR_UNUSED signo)
 }
 #endif
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	print_results
+ * Function:    print_results
  *
- * Purpose:	Prints information about the detected data types.
+ * Purpose:    Prints information about the detected data types.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 14, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 14, 1996
  *
  * Modifications:
  *
@@ -596,7 +606,7 @@ static void
 print_results(int nd, detected_t *d, int na, malign_t *misc_align)
 {
     int         byte_order=0;   /*byte order of data types*/
-    int		i, j;
+    int        i, j;
 
     /* Include files */
     printf("\
@@ -610,11 +620,11 @@ print_results(int nd, detected_t *d, int na, malign_t *misc_align)
 /***********/\n\
 /* Headers */\n\
 /***********/\n\
-#include \"H5private.h\"		/* Generic Functions			*/\n\
-#include \"H5Eprivate.h\"		/* Error handling		  	*/\n\
-#include \"H5FLprivate.h\"	/* Free Lists				*/\n\
-#include \"H5Iprivate.h\"		/* IDs			  		*/\n\
-#include \"H5Tpkg.h\"		/* Datatypes 				*/\n\
+#include \"H5private.h\"        /* Generic Functions            */\n\
+#include \"H5Eprivate.h\"        /* Error handling              */\n\
+#include \"H5FLprivate.h\"    /* Free Lists                */\n\
+#include \"H5Iprivate.h\"        /* IDs                      */\n\
+#include \"H5Tpkg.h\"        /* Datatypes                 */\n\
 \n\
 \n\
 /****************/\n\
@@ -663,15 +673,15 @@ print_results(int nd, detected_t *d, int na, malign_t *misc_align)
     printf("\n\
 \n\
 /*-------------------------------------------------------------------------\n\
- * Function:	H5T__init_native\n\
+ * Function:    H5T__init_native\n\
  *\n\
- * Purpose:	Initialize pre-defined native datatypes from code generated\n\
+ * Purpose:    Initialize pre-defined native datatypes from code generated\n\
  *              during the library configuration by H5detect.\n\
  *\n\
- * Return:	Success:	non-negative\n\
- *		Failure:	negative\n\
+ * Return:    Success:    non-negative\n\
+ *        Failure:    negative\n\
  *\n\
- * Programmer:	Robb Matzke\n\
+ * Programmer:    Robb Matzke\n\
  *              Wednesday, December 16, 1998\n\
  *\n\
  *-------------------------------------------------------------------------\n\
@@ -679,8 +689,8 @@ print_results(int nd, detected_t *d, int na, malign_t *misc_align)
 herr_t\n\
 H5T__init_native(void)\n\
 {\n\
-    H5T_t	*dt = NULL;\n\
-    herr_t	ret_value = SUCCEED;\n\
+    H5T_t    *dt = NULL;\n\
+    herr_t    ret_value = SUCCEED;\n\
 \n\
     FUNC_ENTER_PACKAGE\n");
 
@@ -702,20 +712,20 @@ H5T__init_native(void)\n\
             }
         }
 
-	/* Print a comment to describe this section of definitions. */
-	printf("\n   /*\n");
-	iprint(d+i);
-	printf("    */\n");
+    /* Print a comment to describe this section of definitions. */
+    printf("\n   /*\n");
+    iprint(d+i);
+    printf("    */\n");
 
-	/* The part common to fixed and floating types */
-	printf("\
+    /* The part common to fixed and floating types */
+    printf("\
     if(NULL == (dt = H5T__alloc()))\n\
         HGOTO_ERROR(H5E_DATATYPE, H5E_NOSPACE, FAIL, \"datatype allocation failed\")\n\
     dt->shared->state = H5T_STATE_IMMUTABLE;\n\
     dt->shared->type = H5T_%s;\n\
     dt->shared->size = %d;\n",
-	       d[i].msize ? "FLOAT" : "INTEGER",/*class			*/
-	       d[i].size);			/*size			*/
+        d[i].msize ? "FLOAT" : "INTEGER",/*class            */
+        d[i].size);            /*size            */
 
         if(byte_order==-1)
             printf("\
@@ -732,18 +742,18 @@ H5T__init_native(void)\n\
     dt->shared->u.atomic.prec = %d;\n\
     dt->shared->u.atomic.lsb_pad = H5T_PAD_ZERO;\n\
     dt->shared->u.atomic.msb_pad = H5T_PAD_ZERO;\n",
-	       d[i].offset,			/*offset		*/
-	       d[i].precision);			/*precision		*/
+        d[i].offset,            /*offset        */
+        d[i].precision);            /*precision        */
     /*HDassert((d[i].perm[0]>0)==(byte_order>0));*/   /* Double-check that byte-order doesn't change */
 
-	if (0 == d[i].msize) {
-	    /* The part unique to fixed point types */
-	    printf("\
+    if (0 == d[i].msize) {
+        /* The part unique to fixed point types */
+        printf("\
     dt->shared->u.atomic.u.i.sign = H5T_SGN_%s;\n",
-		   d[i].sign ? "2" : "NONE");
-	} else {
-	    /* The part unique to floating point types */
-	    printf("\
+        d[i].sign ? "2" : "NONE");
+    } else {
+        /* The part unique to floating point types */
+        printf("\
     dt->shared->u.atomic.u.f.sign = %d;\n\
     dt->shared->u.atomic.u.f.epos = %d;\n\
     dt->shared->u.atomic.u.f.esize = %d;\n\
@@ -752,22 +762,22 @@ H5T__init_native(void)\n\
     dt->shared->u.atomic.u.f.msize = %d;\n\
     dt->shared->u.atomic.u.f.norm = H5T_NORM_%s;\n\
     dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;\n",
-		   d[i].sign,	/*sign location */
-		   d[i].epos,	/*exponent loc	*/
-		   d[i].esize,	/*exponent size */
-		   (unsigned long)(d[i].bias),	 /*exponent bias */
-		   d[i].mpos,	/*mantissa loc	*/
-		   d[i].msize,	/*mantissa size */
-		   d[i].imp ? "IMPLIED" : "NONE");	/*normalization */
-	}
-
-	/* Atomize the type */
-	printf("\
+        d[i].sign,    /*sign location */
+        d[i].epos,    /*exponent loc    */
+        d[i].esize,    /*exponent size */
+        (unsigned long)(d[i].bias),     /*exponent bias */
+        d[i].mpos,    /*mantissa loc    */
+        d[i].msize,    /*mantissa size */
+        d[i].imp ? "IMPLIED" : "NONE");    /*normalization */
+    }
+
+    /* Atomize the type */
+    printf("\
     if((H5T_NATIVE_%s_g = H5I_register(H5I_DATATYPE, dt, FALSE)) < 0)\n\
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, \"can't register ID for built-in datatype\")\n",
-	       d[i].varname);
-	printf("    H5T_NATIVE_%s_ALIGN_g = %lu;\n",
-	       d[i].varname, (unsigned long)(d[i].align));
+        d[i].varname);
+    printf("    H5T_NATIVE_%s_ALIGN_g = %lu;\n",
+        d[i].varname, (unsigned long)(d[i].align));
 
         /* Variables for alignment of compound datatype */
         if(!HDstrcmp(d[i].varname, "SCHAR")  || !HDstrcmp(d[i].varname, "SHORT") ||
@@ -809,69 +819,69 @@ done:\n\
 
     /* Print the ALIGNMENT and signal-handling status as comments */
     printf("\n"
-	"/****************************************/\n"
-	"/* ALIGNMENT and signal-handling status */\n"
-	"/****************************************/\n");
+    "/****************************************/\n"
+    "/* ALIGNMENT and signal-handling status */\n"
+    "/****************************************/\n");
     if (align_status_g & STA_NoALIGNMENT)
-	printf("/* ALIGNAMENT test is not available */\n");
+    printf("/* ALIGNAMENT test is not available */\n");
     if (align_status_g & STA_NoHandlerVerify)
-	printf("/* Signal handlers verify test is not available */\n");
+    printf("/* Signal handlers verify test is not available */\n");
     /* The following is available in H5pubconf.h. Printing them here for */
     /* convenience. */
 #ifdef H5_HAVE_SIGNAL
-	printf("/* Signal() support: yes */\n");
+    printf("/* Signal() support: yes */\n");
 #else
-	printf("/* Signal() support: no */\n");
+    printf("/* Signal() support: no */\n");
 #endif
 #ifdef H5_HAVE_SETJMP
-	printf("/* setjmp() support: yes */\n");
+    printf("/* setjmp() support: yes */\n");
 #else
-	printf("/* setjmp() support: no */\n");
+    printf("/* setjmp() support: no */\n");
 #endif
 #ifdef H5_HAVE_LONGJMP
-	printf("/* longjmp() support: yes */\n");
+    printf("/* longjmp() support: yes */\n");
 #else
-	printf("/* longjmp() support: no */\n");
+    printf("/* longjmp() support: no */\n");
 #endif
 #ifdef H5_HAVE_SIGSETJMP
-	printf("/* sigsetjmp() support: yes */\n");
+    printf("/* sigsetjmp() support: yes */\n");
 #else
-	printf("/* sigsetjmp() support: no */\n");
+    printf("/* sigsetjmp() support: no */\n");
 #endif
 #ifdef H5_HAVE_SIGLONGJMP
-	printf("/* siglongjmp() support: yes */\n");
+    printf("/* siglongjmp() support: yes */\n");
 #else
-	printf("/* siglongjmp() support: no */\n");
+    printf("/* siglongjmp() support: no */\n");
 #endif
 #ifdef H5_HAVE_SIGPROCMASK
-	printf("/* sigprocmask() support: yes */\n");
+    printf("/* sigprocmask() support: yes */\n");
 #else
-	printf("/* sigprocmask() support: no */\n");
+    printf("/* sigprocmask() support: no */\n");
 #endif
 
     /* Print the statics of signal handlers called for debugging */
     printf("\n"
-	"/******************************/\n"
-	"/* signal handlers statistics */\n"
-	"/******************************/\n");
+    "/******************************/\n"
+    "/* signal handlers statistics */\n"
+    "/******************************/\n");
     printf("/* signal_handlers tested: %d times */\n", signal_handler_tested_g);
     printf("/* sigbus_handler called: %d times */\n", sigbus_handler_called_g);
     printf("/* sigsegv_handler called: %d times */\n", sigsegv_handler_called_g);
     printf("/* sigill_handler called: %d times */\n", sigill_handler_called_g);
 } /* end print_results() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	iprint
+ * Function:    iprint
  *
- * Purpose:	Prints information about the fields of a floating point
- *		format.
+ * Purpose:    Prints information about the fields of a floating point
+ *        format.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 13, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 13, 1996
  *
  * Modifications:
  *
@@ -945,22 +955,22 @@ iprint(detected_t *d)
 
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	byte_cmp
+ * Function:    byte_cmp
  *
- * Purpose:	Compares two chunks of memory A and B and returns the
- *		byte index into those arrays of the first byte that
- *		differs between A and B.  Ignores differences where the
+ * Purpose:    Compares two chunks of memory A and B and returns the
+ *        byte index into those arrays of the first byte that
+ *        differs between A and B.  Ignores differences where the
  *              corresponding bit in pad_mask is set to 0.
  *
- * Return:	Success:	Index of differing byte.
+ * Return:    Success:    Index of differing byte.
  *
- *		Failure:	-1 if all bytes are the same.
+ *        Failure:    -1 if all bytes are the same.
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 12, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 12, 1996
  *
  * Modifications:
  *
@@ -980,17 +990,17 @@ byte_cmp(int n, const void *_a, const void *_b, const unsigned char *pad_mask)
     return -1;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	bit_cmp
+ * Function:    bit_cmp
  *
- * Purpose:	Compares two bit vectors and returns the index for the
- *		first bit that differs between the two vectors.	 The
- *		size of the vector is NBYTES.  PERM is a mapping from
- *		actual order to little endian.  Ignores differences where
+ * Purpose:    Compares two bit vectors and returns the index for the
+ *        first bit that differs between the two vectors.     The
+ *        size of the vector is NBYTES.  PERM is a mapping from
+ *        actual order to little endian.  Ignores differences where
  *              the corresponding bit in pad_mask is set to 0.
  *
- * Return:	Index of first differing bit.
+ * Return:    Index of first differing bit.
  *
  *-------------------------------------------------------------------------
  */
@@ -1021,23 +1031,23 @@ bit_cmp(unsigned int nbytes, int *perm, void *_a, void *_b,
     return 0;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	fix_order
+ * Function:    fix_order
  *
- * Purpose:	Given an array PERM with elements FIRST through LAST
- *		initialized with zero origin byte numbers, this function
- *		creates a permutation vector that maps the actual order
- *		of a floating point number to little-endian.
+ * Purpose:    Given an array PERM with elements FIRST through LAST
+ *        initialized with zero origin byte numbers, this function
+ *        creates a permutation vector that maps the actual order
+ *        of a floating point number to little-endian.
  *
- *		This function assumes that the mantissa byte ordering
- *		implies the total ordering.
+ *        This function assumes that the mantissa byte ordering
+ *        implies the total ordering.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 13, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 13, 1996
  *
  * Modifications:
  *
@@ -1046,81 +1056,81 @@ bit_cmp(unsigned int nbytes, int *perm, void *_a, void *_b,
 static void
 fix_order(int n, int last, int *perm, const char **mesg)
 {
-    int		i;
+    int        i;
 
     if (last > 1) {
-	/*
-	 * We have at least three points to consider.
-	 */
-	if (perm[last] < perm[last - 1] && perm[last - 1] < perm[last - 2]) {
-	    /*
-	     * Little endian.
-	     */
-	    if (mesg) *mesg = "Little-endian";
-	    for (i = 0; i < n; i++) perm[i] = i;
-
-	} else if (perm[last] > perm[last-1] && perm[last-1] > perm[last-2]) {
-	    /*
-	     * Big endian.
-	     */
-	    if (mesg) *mesg = "Big-endian";
-	    for (i = 0; i < n; i++) perm[i] = (n - 1) - i;
-
-	} else {
-	    /*
-	     * Bi-endian machines like VAX.
+    /*
+    * We have at least three points to consider.
+    */
+    if (perm[last] < perm[last - 1] && perm[last - 1] < perm[last - 2]) {
+        /*
+        * Little endian.
+        */
+        if (mesg) *mesg = "Little-endian";
+        for (i = 0; i < n; i++) perm[i] = i;
+
+    } else if (perm[last] > perm[last-1] && perm[last-1] > perm[last-2]) {
+        /*
+        * Big endian.
+        */
+        if (mesg) *mesg = "Big-endian";
+        for (i = 0; i < n; i++) perm[i] = (n - 1) - i;
+
+    } else {
+        /*
+        * Bi-endian machines like VAX.
              * (NOTE: This is not an actual determination of the VAX-endianess.
              *          It could have some other endianess and fall into this
              *          case - JKM & QAK)
-	     */
-	    HDassert(0 == n % 2);
-	    if (mesg) *mesg = "VAX";
-	    for (i = 0; i < n; i += 2) {
-		perm[i] = (n - 2) - i;
-		perm[i + 1] = (n - 1) - i;
-	    }
-	}
+        */
+        HDassert(0 == n % 2);
+        if (mesg) *mesg = "VAX";
+        for (i = 0; i < n; i += 2) {
+        perm[i] = (n - 2) - i;
+        perm[i + 1] = (n - 1) - i;
+        }
+    }
     } else {
-	fprintf(stderr,
-	     "Failed to detect byte order of %d-byte floating point.\n", n);
-	HDexit(1);
+    fprintf(stderr,
+        "Failed to detect byte order of %d-byte floating point.\n", n);
+    HDexit(1);
     }
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	imp_bit
+ * Function:    imp_bit
  *
- * Purpose:	Looks for an implicit bit in the mantissa.  The value
- *		of _A should be 1.0 and the value of _B should be 0.5.
- *		Some floating-point formats discard the most significant
- *		bit of the mantissa after normalizing since it will always
- *		be a one (except for 0.0).  If this is true for the native
- *		floating point values stored in _A and _B then the function
- *		returns non-zero.
+ * Purpose:    Looks for an implicit bit in the mantissa.  The value
+ *        of _A should be 1.0 and the value of _B should be 0.5.
+ *        Some floating-point formats discard the most significant
+ *        bit of the mantissa after normalizing since it will always
+ *        be a one (except for 0.0).  If this is true for the native
+ *        floating point values stored in _A and _B then the function
+ *        returns non-zero.
  *
- *		This function assumes that the exponent occupies higher
- *		order bits than the mantissa and that the most significant
- *		bit of the mantissa is next to the least signficant bit
- *		of the exponent.
+ *        This function assumes that the exponent occupies higher
+ *        order bits than the mantissa and that the most significant
+ *        bit of the mantissa is next to the least signficant bit
+ *        of the exponent.
  *
  *
- * Return:	Success:	Non-zero if the most significant bit
- *				of the mantissa is discarded (ie, the
- *				mantissa has an implicit `one' as the
- *				most significant bit).	Otherwise,
- *				returns zero.
+ * Return:    Success:    Non-zero if the most significant bit
+ *                of the mantissa is discarded (ie, the
+ *                mantissa has an implicit `one' as the
+ *                most significant bit).    Otherwise,
+ *                returns zero.
  *
- *		Failure:	exit(1)
+ *        Failure:    exit(1)
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 13, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 13, 1996
  *
  * Modifications:
  *
- *	Robb Matzke, 6 Nov 1996
- *	Fixed a bug that occurs with non-implicit architectures.
+ *    Robb Matzke, 6 Nov 1996
+ *    Fixed a bug that occurs with non-implicit architectures.
  *
  *-------------------------------------------------------------------------
  */
@@ -1150,26 +1160,26 @@ imp_bit(unsigned int n, int *perm, void *_a, void *_b, const unsigned char *pad_
     return (a[perm[major]] >> minor) & 0x01 ? 0 : 1;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	find_bias
+ * Function:    find_bias
  *
- * Purpose:	Determines the bias of the exponent.  This function should
- *		be called with _A having a value of `1'.
+ * Purpose:    Determines the bias of the exponent.  This function should
+ *        be called with _A having a value of `1'.
  *
- * Return:	Success:	The exponent bias.
+ * Return:    Success:    The exponent bias.
  *
- *		Failure:
+ *        Failure:
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 13, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 13, 1996
  *
  * Modifications:
  *
- *	Robb Matzke, 6 Nov 1996
- *	Fixed a bug with non-implicit architectures returning the
- *	wrong exponent bias.
+ *    Robb Matzke, 6 Nov 1996
+ *    Fixed a bug with non-implicit architectures returning the
+ *    wrong exponent bias.
  *
  *-------------------------------------------------------------------------
  */
@@ -1193,17 +1203,17 @@ find_bias(unsigned int epos, unsigned int esize, int *perm, void *_a)
     return bias;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	print_header
+ * Function:    print_header
  *
- * Purpose:	Prints the C file header for the generated file.
+ * Purpose:    Prints the C file header for the generated file.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Mar 12 1997
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Mar 12 1997
  *
  * Modifications:
  *
@@ -1213,22 +1223,22 @@ static void
 print_header(void)
 {
 
-    time_t		now = HDtime(NULL);
-    struct tm		*tm = HDlocaltime(&now);
-    char		real_name[30];
-    char		host_name[256];
-    int			i;
-    const char		*s;
+    time_t        now = HDtime(NULL);
+    struct tm        *tm = HDlocaltime(&now);
+    char        real_name[30];
+    char        host_name[256];
+    int            i;
+    const char        *s;
 #ifdef H5_HAVE_GETPWUID
-    struct passwd	*pwd = NULL;
+    struct passwd    *pwd = NULL;
 #else
-    int			pwd = 1;
+    int            pwd = 1;
 #endif
-    static const char	*month_name[] =
+    static const char    *month_name[] =
     {
-	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
-	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
-    static const char	*purpose = "\
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+    static const char    *purpose = "\
 This machine-generated source code contains\n\
 information about the various integer and\n\
 floating point numeric formats found on this\n\
@@ -1240,7 +1250,7 @@ Each of the numeric formats listed below are\n\
 printed from most significant bit to least\n\
 significant bit even though the actual bytes\n\
 might be stored in a different order in\n\
-memory.	 The integers above each binary byte\n\
+memory.     The integers above each binary byte\n\
 indicate the relative order of the bytes in\n\
 memory; little-endian machines have\n\
 decreasing numbers while big-endian machines\n\
@@ -1251,8 +1261,8 @@ letters with `S' for the mantissa sign bit,\n\
 `M' for the mantissa magnitude, and `E' for\n\
 the exponent.  The exponent has an associated\n\
 bias which can be subtracted to find the\n\
-true exponent.	The radix point is assumed\n\
-to be before the first `M' bit.	 Any bit\n\
+true exponent.    The radix point is assumed\n\
+to be before the first `M' bit.     Any bit\n\
 of a floating-point value not falling into one\n\
 of these categories is printed as a question\n\
 mark.  Bits of integer types are printed as\n\
@@ -1271,20 +1281,20 @@ bit.\n";
      */
 #ifdef H5_HAVE_GETPWUID
     {
-	size_t n;
-	char *comma;
-	if ((pwd = HDgetpwuid(HDgetuid()))) {
-	    if ((comma = HDstrchr(pwd->pw_gecos, ','))) {
-		n = MIN(sizeof(real_name)-1, (unsigned)(comma-pwd->pw_gecos));
-		HDstrncpy(real_name, pwd->pw_gecos, n);
-		real_name[n] = '\0';
-	    } else {
-		HDstrncpy(real_name, pwd->pw_gecos, sizeof(real_name));
-		real_name[sizeof(real_name) - 1] = '\0';
-	    }
-	} else {
-	    real_name[0] = '\0';
-	}
+    size_t n;
+    char *comma;
+    if ((pwd = HDgetpwuid(HDgetuid()))) {
+        if ((comma = HDstrchr(pwd->pw_gecos, ','))) {
+        n = MIN(sizeof(real_name)-1, (unsigned)(comma-pwd->pw_gecos));
+        HDstrncpy(real_name, pwd->pw_gecos, n);
+        real_name[n] = '\0';
+        } else {
+        HDstrncpy(real_name, pwd->pw_gecos, sizeof(real_name));
+        real_name[sizeof(real_name) - 1] = '\0';
+        }
+    } else {
+        real_name[0] = '\0';
+    }
     }
 #else
     real_name[0] = '\0';
@@ -1295,7 +1305,7 @@ bit.\n";
      */
 #ifdef H5_HAVE_GETHOSTNAME
     if (HDgethostname(host_name, sizeof(host_name)) < 0) {
-	host_name[0] = '\0';
+    host_name[0] = '\0';
     }
 #else
     host_name[0] = '\0';
@@ -1305,24 +1315,24 @@ bit.\n";
      * The file header: warning, copyright notice, build information.
      */
     printf("/* Generated automatically by H5detect -- do not edit */\n\n\n");
-    HDputs(FileHeader);		/*the copyright notice--see top of this file */
+    HDputs(FileHeader);        /*the copyright notice--see top of this file */
 
     printf(" *\n * Created:\t\t%s %2d, %4d\n",
-	   month_name[tm->tm_mon], tm->tm_mday, 1900 + tm->tm_year);
+    month_name[tm->tm_mon], tm->tm_mday, 1900 + tm->tm_year);
     if (pwd || real_name[0] || host_name[0]) {
-	printf(" *\t\t\t");
-	if (real_name[0]) printf("%s <", real_name);
+    printf(" *\t\t\t");
+    if (real_name[0]) printf("%s <", real_name);
 #ifdef H5_HAVE_GETPWUID
-	if (pwd) HDfputs(pwd->pw_name, stdout);
+    if (pwd) HDfputs(pwd->pw_name, stdout);
 #endif
-	if (host_name[0]) printf("@%s", host_name);
-	if (real_name[0]) printf(">");
-	HDputchar('\n');
+    if (host_name[0]) printf("@%s", host_name);
+    if (real_name[0]) printf(">");
+    HDputchar('\n');
     }
     printf(" *\n * Purpose:\t\t");
     for (s = purpose; *s; s++) {
-	HDputchar(*s);
-	if ('\n' == *s && s[1]) printf(" *\t\t\t");
+    HDputchar(*s);
+    if ('\n' == *s && s[1]) printf(" *\t\t\t");
     }
 
     printf(" *\n * Modifications:\n *\n");
@@ -1335,84 +1345,84 @@ bit.\n";
 
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C89_integers
+ * Function:    detect_C89_integers
  *
- * Purpose:	Detect C89 integer types
+ * Purpose:    Detect C89 integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C89_integers(void)
+detect_C89_integers(void) HDF_NO_UBSAN
 {
-    DETECT_BYTE(signed char,	  SCHAR,        d_g[nd_g]); nd_g++;
-    DETECT_BYTE(unsigned char,	  UCHAR,        d_g[nd_g]); nd_g++;
-    DETECT_I(short,		  SHORT,        d_g[nd_g]); nd_g++;
-    DETECT_I(unsigned short,	  USHORT,       d_g[nd_g]); nd_g++;
-    DETECT_I(int,		  INT,	        d_g[nd_g]); nd_g++;
-    DETECT_I(unsigned int,	  UINT,	        d_g[nd_g]); nd_g++;
-    DETECT_I(long,		  LONG,	        d_g[nd_g]); nd_g++;
-    DETECT_I(unsigned long,	  ULONG,        d_g[nd_g]); nd_g++;
+    DETECT_BYTE(signed char,      SCHAR,        d_g[nd_g]); nd_g++;
+    DETECT_BYTE(unsigned char,      UCHAR,        d_g[nd_g]); nd_g++;
+    DETECT_I(short,          SHORT,        d_g[nd_g]); nd_g++;
+    DETECT_I(unsigned short,      USHORT,       d_g[nd_g]); nd_g++;
+    DETECT_I(int,          INT,            d_g[nd_g]); nd_g++;
+    DETECT_I(unsigned int,      UINT,            d_g[nd_g]); nd_g++;
+    DETECT_I(long,          LONG,            d_g[nd_g]); nd_g++;
+    DETECT_I(unsigned long,      ULONG,        d_g[nd_g]); nd_g++;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C89_floats
+ * Function:    detect_C89_floats
  *
- * Purpose:	Detect C89 floating point types
+ * Purpose:    Detect C89 floating point types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C89_floats(void)
+detect_C89_floats(void) HDF_NO_UBSAN
 {
     DETECT_F(float,     FLOAT,      d_g[nd_g]); nd_g++;
     DETECT_F(double,    DOUBLE,     d_g[nd_g]); nd_g++;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers8
+ * Function:    detect_C99_integers8
  *
- * Purpose:	Detect C99 8 bit integer types
+ * Purpose:    Detect C99 8 bit integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers8(void)
+detect_C99_integers8(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_INT8_T>0
   #if H5_SIZEOF_INT8_T==1
     DETECT_BYTE(int8_t,           INT8,         d_g[nd_g]); nd_g++;
   #else
-    DETECT_I(int8_t, 		  INT8,         d_g[nd_g]); nd_g++;
+    DETECT_I(int8_t,           INT8,         d_g[nd_g]); nd_g++;
   #endif
 #endif
 #if H5_SIZEOF_UINT8_T>0
   #if H5_SIZEOF_UINT8_T==1
-    DETECT_BYTE(uint8_t, 	  UINT8,        d_g[nd_g]); nd_g++;
+    DETECT_BYTE(uint8_t,       UINT8,        d_g[nd_g]); nd_g++;
   #else
     DETECT_I(uint8_t,             UINT8,        d_g[nd_g]); nd_g++;
   #endif
@@ -1421,147 +1431,147 @@ detect_C99_integers8(void)
   #if H5_SIZEOF_INT_LEAST8_T==1
     DETECT_BYTE(int_least8_t,     INT_LEAST8,   d_g[nd_g]); nd_g++;
   #else
-    DETECT_I(int_least8_t, 	  INT_LEAST8,   d_g[nd_g]); nd_g++;
+    DETECT_I(int_least8_t,       INT_LEAST8,   d_g[nd_g]); nd_g++;
   #endif
 #endif
 #if H5_SIZEOF_UINT_LEAST8_T>0
   #if H5_SIZEOF_UINT_LEAST8_T==1
     DETECT_BYTE(uint_least8_t,    UINT_LEAST8,  d_g[nd_g]); nd_g++;
   #else
-    DETECT_I(uint_least8_t, 	  UINT_LEAST8,  d_g[nd_g]); nd_g++;
+    DETECT_I(uint_least8_t,       UINT_LEAST8,  d_g[nd_g]); nd_g++;
   #endif
 #endif
 #if H5_SIZEOF_INT_FAST8_T>0
   #if H5_SIZEOF_INT_FAST8_T==1
     DETECT_BYTE(int_fast8_t,      INT_FAST8,    d_g[nd_g]); nd_g++;
   #else
-    DETECT_I(int_fast8_t, 	  INT_FAST8,    d_g[nd_g]); nd_g++;
+    DETECT_I(int_fast8_t,       INT_FAST8,    d_g[nd_g]); nd_g++;
   #endif
 #endif
 #if H5_SIZEOF_UINT_FAST8_T>0
   #if H5_SIZEOF_UINT_FAST8_T==1
-    DETECT_BYTE(uint_fast8_t, 	  UINT_FAST8,   d_g[nd_g]); nd_g++;
+    DETECT_BYTE(uint_fast8_t,       UINT_FAST8,   d_g[nd_g]); nd_g++;
   #else
     DETECT_I(uint_fast8_t,     UINT_FAST8,   d_g[nd_g]); nd_g++;
   #endif
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers16
+ * Function:    detect_C99_integers16
  *
- * Purpose:	Detect C99 16 bit integer types
+ * Purpose:    Detect C99 16 bit integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers16(void)
+detect_C99_integers16(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_INT16_T>0
-    DETECT_I(int16_t, 		  INT16,        d_g[nd_g]); nd_g++;
+    DETECT_I(int16_t,           INT16,        d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT16_T>0
-    DETECT_I(uint16_t, 		  UINT16,       d_g[nd_g]); nd_g++;
+    DETECT_I(uint16_t,           UINT16,       d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_LEAST16_T>0
-    DETECT_I(int_least16_t, 	  INT_LEAST16,  d_g[nd_g]); nd_g++;
+    DETECT_I(int_least16_t,       INT_LEAST16,  d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_LEAST16_T>0
-    DETECT_I(uint_least16_t, 	  UINT_LEAST16, d_g[nd_g]); nd_g++;
+    DETECT_I(uint_least16_t,       UINT_LEAST16, d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_FAST16_T>0
-    DETECT_I(int_fast16_t, 	  INT_FAST16,   d_g[nd_g]); nd_g++;
+    DETECT_I(int_fast16_t,       INT_FAST16,   d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_FAST16_T>0
-    DETECT_I(uint_fast16_t, 	  UINT_FAST16,  d_g[nd_g]); nd_g++;
+    DETECT_I(uint_fast16_t,       UINT_FAST16,  d_g[nd_g]); nd_g++;
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers32
+ * Function:    detect_C99_integers32
  *
- * Purpose:	Detect C99 32 bit integer types
+ * Purpose:    Detect C99 32 bit integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers32(void)
+detect_C99_integers32(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_INT32_T>0
-    DETECT_I(int32_t, 		  INT32,        d_g[nd_g]); nd_g++;
+    DETECT_I(int32_t,           INT32,        d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT32_T>0
-    DETECT_I(uint32_t, 		  UINT32,       d_g[nd_g]); nd_g++;
+    DETECT_I(uint32_t,           UINT32,       d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_LEAST32_T>0
-    DETECT_I(int_least32_t, 	  INT_LEAST32,  d_g[nd_g]); nd_g++;
+    DETECT_I(int_least32_t,       INT_LEAST32,  d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_LEAST32_T>0
-    DETECT_I(uint_least32_t, 	  UINT_LEAST32, d_g[nd_g]); nd_g++;
+    DETECT_I(uint_least32_t,       UINT_LEAST32, d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_FAST32_T>0
-    DETECT_I(int_fast32_t, 	  INT_FAST32,   d_g[nd_g]); nd_g++;
+    DETECT_I(int_fast32_t,       INT_FAST32,   d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_FAST32_T>0
-    DETECT_I(uint_fast32_t, 	  UINT_FAST32,  d_g[nd_g]); nd_g++;
+    DETECT_I(uint_fast32_t,       UINT_FAST32,  d_g[nd_g]); nd_g++;
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers64
+ * Function:    detect_C99_integers64
  *
- * Purpose:	Detect C99 64 bit integer types
+ * Purpose:    Detect C99 64 bit integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers64(void)
+detect_C99_integers64(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_INT64_T>0
-    DETECT_I(int64_t, 		  INT64,        d_g[nd_g]); nd_g++;
+    DETECT_I(int64_t,           INT64,        d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT64_T>0
-    DETECT_I(uint64_t, 		  UINT64,       d_g[nd_g]); nd_g++;
+    DETECT_I(uint64_t,           UINT64,       d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_LEAST64_T>0
-    DETECT_I(int_least64_t, 	  INT_LEAST64,  d_g[nd_g]); nd_g++;
+    DETECT_I(int_least64_t,       INT_LEAST64,  d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_LEAST64_T>0
-    DETECT_I(uint_least64_t, 	  UINT_LEAST64, d_g[nd_g]); nd_g++;
+    DETECT_I(uint_least64_t,       UINT_LEAST64, d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_FAST64_T>0
-    DETECT_I(int_fast64_t, 	  INT_FAST64,   d_g[nd_g]); nd_g++;
+    DETECT_I(int_fast64_t,       INT_FAST64,   d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_FAST64_T>0
-    DETECT_I(uint_fast64_t, 	  UINT_FAST64,  d_g[nd_g]); nd_g++;
+    DETECT_I(uint_fast64_t,       UINT_FAST64,  d_g[nd_g]); nd_g++;
 #endif
 
 #if H5_SIZEOF_LONG_LONG>0
-    DETECT_I(long long,		  LLONG,        d_g[nd_g]); nd_g++;
+    DETECT_I(long long,          LLONG,        d_g[nd_g]); nd_g++;
     DETECT_I(unsigned long long,  ULLONG,       d_g[nd_g]); nd_g++;
 #else
     /*
@@ -1569,28 +1579,28 @@ detect_C99_integers64(void)
      * so we'll just make H5T_NATIVE_LLONG the same as H5T_NATIVE_LONG since
      * `long long' is probably equivalent to `long' here anyway.
      */
-    DETECT_I(long,		  LLONG,        d_g[nd_g]); nd_g++;
-    DETECT_I(unsigned long,	  ULLONG,       d_g[nd_g]); nd_g++;
+    DETECT_I(long,          LLONG,        d_g[nd_g]); nd_g++;
+    DETECT_I(unsigned long,      ULLONG,       d_g[nd_g]); nd_g++;
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers
+ * Function:    detect_C99_integers
  *
- * Purpose:	Detect C99 integer types
+ * Purpose:    Detect C99 integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers(void)
+detect_C99_integers(void) HDF_NO_UBSAN
 {
     /* break it down to more subroutines so that each module subroutine */
     /* is smaller and takes less time to compile with optimization on.  */
@@ -1600,23 +1610,23 @@ detect_C99_integers(void)
     detect_C99_integers64();
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_floats
+ * Function:    detect_C99_floats
  *
- * Purpose:	Detect C99 floating point types
+ * Purpose:    Detect C99 floating point types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_floats(void)
+detect_C99_floats(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_DOUBLE == H5_SIZEOF_LONG_DOUBLE
     /*
@@ -1625,29 +1635,29 @@ detect_C99_floats(void)
      * some systems and `long double' is probably the same as `double' here
      * anyway.
      */
-    DETECT_F(double,		  LDOUBLE,      d_g[nd_g]); nd_g++;
+    DETECT_F(double,          LDOUBLE,      d_g[nd_g]); nd_g++;
 #elif H5_SIZEOF_LONG_DOUBLE !=0
-    DETECT_F(long double,	  LDOUBLE,      d_g[nd_g]); nd_g++;
+    DETECT_F(long double,      LDOUBLE,      d_g[nd_g]); nd_g++;
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_alignments
+ * Function:    detect_alignments
  *
- * Purpose:	Detect structure alignments
+ * Purpose:    Detect structure alignments
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_alignments(void)
+detect_alignments(void) HDF_NO_UBSAN
 {
     /* Detect structure alignment for pointers, hvl_t, hobj_ref_t, hdset_reg_ref_t */
     DETECT_M(void *,              POINTER,      m_g[na_g]); na_g++;
@@ -1656,7 +1666,7 @@ detect_alignments(void)
     DETECT_M(hdset_reg_ref_t,     HDSETREGREF,  m_g[na_g]); na_g++;
 }
 
-
+
 #if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
 /* Verify the signal handler for signal signum works correctly multiple times.
  * One possible cause of failure is that the signal handling is blocked or
@@ -1664,64 +1674,70 @@ detect_alignments(void)
  * Return  0 for success, -1 for failure.
  */
 static int verify_signal_handlers(int signum, void (*handler)(int))
-{						      
-    void	(*save_handler)(int) = HDsignal(signum, handler);    
+{
+#if defined(__has_feature)
+#if __has_feature(address_sanitizer) || __has_feature(thread_sanitizer)
+    /* Under the address and thread sanitizers, don't raise any signals. */
+    return 0;
+#endif
+#endif
+    void    (*save_handler)(int) = HDsignal(signum, handler);
     volatile int i, val;
     int ntries=5;
     volatile int nfailures=0;
     volatile int nsuccesses=0;
-									      
-    for (i=0;i<ntries; i++){    
-	val=H5SETJMP(jbuf_g);
-	if (val==0)
-	{    
-	    /* send self the signal to trigger the handler */    
-	    signal_handler_tested_g++;
-	    HDraise(signum);    
-	    /* Should not reach here. Record error. */
-	    nfailures++;
-	}else{
-	    if (val==signum){ 
-		/* return from signum handler. Record a sucess. */
-		nsuccesses++;
-	    }else{
-		fprintf(stderr, "Unknown return value (%d) from H5SETJMP",
-		    val);    
-		nfailures++;
-	    }
-	}
-    }    
+
+    for (i=0;i<ntries; i++){
+    val=H5SETJMP(jbuf_g);
+    if (val==0)
+    {
+        /* send self the signal to trigger the handler */
+        signal_handler_tested_g++;
+        HDraise(signum);
+        /* Should not reach here. Record error. */
+        nfailures++;
+    }else{
+        if (val==signum){
+        /* return from signum handler. Record a sucess. */
+        nsuccesses++;
+        }else{
+        fprintf(stderr, "Unknown return value (%d) from H5SETJMP",
+            val);
+        nfailures++;
+        }
+    }
+    }
     /* restore save handler, check results and report failures */
     HDsignal(signum, save_handler);
     if (nfailures>0 || nsuccesses != ntries){
-	fprintf(stderr, "verify_signal_handlers for signal %d did %d tries. "
-	       "Found %d failures and %d successes\n",
-	       signum, ntries, nfailures, nsuccesses);
-	return(-1);
+    fprintf(stderr, "verify_signal_handlers for signal %d did %d tries. "
+        "Found %d failures and %d successes\n",
+        signum, ntries, nfailures, nsuccesses);
+    return(-1);
     }else{
-	/* all succeeded */
-	return(0);
+    /* all succeeded */
+    return(0);
     }
-}    
+}
 #endif
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	main
+ * Function:    main
  *
- * Purpose:	Main entry point.
+ * Purpose:    Main entry point.
  *
- * Return:	Success:	exit(0)
+ * Return:    Success:    exit(0)
  *
- *		Failure:	exit(1)
+ *        Failure:    exit(1)
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 12, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 12, 1996
  *
  * Modifications:
- *	Albert Cheng, 2004/05/20
- *	Some compilers, e.g., Intel C v7.0, took a long time to compile
+ *    Albert Cheng, 2004/05/20
+ *    Some compilers, e.g., Intel C v7.0, took a long time to compile
  *      with optimization when a module routine contains many code lines.
  *      Divide up all those types detections macros into subroutines, both
  *      to avoid the compiler optimization error and cleaner codes.
@@ -1729,7 +1745,7 @@ static int verify_signal_handlers(int signum, void (*handler)(int))
  *-------------------------------------------------------------------------
  */
 int
-main(void)
+main(void) HDF_NO_UBSAN
 {
 
 #if defined(H5_HAVE_SETSYSINFO) && defined(SSI_NVPAIRS)
@@ -1738,12 +1754,12 @@ main(void)
      * Make sure unaligned access generates SIGBUS and doesn't print warning
      * messages so that we can detect alignment constraints on the DEC Alpha.
      */
-    int			nvpairs[2];
+    int            nvpairs[2];
     nvpairs[0] = SSIN_UACPROC;
     nvpairs[1] = UAC_NOPRINT | UAC_SIGBUS;
     if (setsysinfo(SSI_NVPAIRS, nvpairs, 1, 0, 0)<0) {
-	fprintf(stderr, "H5detect: unable to turn off UAC handling: %s\n",
-		HDstrerror(errno));
+    fprintf(stderr, "H5detect: unable to turn off UAC handling: %s\n",
+        HDstrerror(errno));
     }
 #endif
 #endif