Author: pfg
Date: Mon Mar 21 01:17:48 2016
New Revision: 297130
URL: https://svnweb.freebsd.org/changeset/base/297130
Log:
MFC r296816:
libdtrace: use calloc(3) instead of malloc(3) when it makes sense.
calloc(3) is faster and occasionally safer than malloc(3) + bzero(3).
In one case, pointed out by Mark[1], this also cleans up a calculation.
Reviewed by: markj [1]
Modified:
stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_module.c
stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_regset.c
stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_strtab.c
Directory Properties:
stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/ (props changed)
Modified: stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_module.c
==============================================================================
--- stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_module.c Mon Mar
21 01:14:32 2016 (r297129)
+++ stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_module.c Mon Mar
21 01:17:48 2016 (r297130)
@@ -23,6 +23,10 @@
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*/
+/*
+ * Portions Copyright 2016 Pedro Giffuni. All rights reserved.
+ */
+
#include <sys/types.h>
#if defined(sun)
#include <sys/modctl.h>
@@ -610,17 +614,14 @@ dt_module_load(dtrace_hdl_t *dtp, dt_mod
dmp->dm_nsymbuckets = _dtrace_strbuckets;
dmp->dm_symfree = 1; /* first free element is index 1 */
- dmp->dm_symbuckets = malloc(sizeof (uint_t) * dmp->dm_nsymbuckets);
- dmp->dm_symchains = malloc(sizeof (dt_sym_t) * dmp->dm_nsymelems + 1);
+ dmp->dm_symbuckets = calloc(dmp->dm_nsymbuckets, sizeof (uint_t));
+ dmp->dm_symchains = calloc(dmp->dm_nsymelems + 1, sizeof (dt_sym_t));
if (dmp->dm_symbuckets == NULL || dmp->dm_symchains == NULL) {
dt_module_unload(dtp, dmp);
return (dt_set_errno(dtp, EDT_NOMEM));
}
- bzero(dmp->dm_symbuckets, sizeof (uint_t) * dmp->dm_nsymbuckets);
- bzero(dmp->dm_symchains, sizeof (dt_sym_t) * dmp->dm_nsymelems + 1);
-
/*
* Iterate over the symbol table data buffer and insert each symbol
* name into the name hash if the name and type are valid. Then
Modified: stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_regset.c
==============================================================================
--- stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_regset.c Mon Mar
21 01:14:32 2016 (r297129)
+++ stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_regset.c Mon Mar
21 01:17:48 2016 (r297130)
@@ -27,6 +27,7 @@
/*
* Copyright (c) 2012 by Delphix. All rights reserved.
+ * Copyright (c) 2016 Pedro Giffuni. All rights reserved.
*/
#include <sys/types.h>
@@ -47,15 +48,15 @@ dt_regset_create(ulong_t nregs)
if (drp == NULL)
return (NULL);
- drp->dr_bitmap = malloc(sizeof (ulong_t) * n);
- drp->dr_size = nregs;
+ drp->dr_bitmap = calloc(n, sizeof (ulong_t));
if (drp->dr_bitmap == NULL) {
dt_regset_destroy(drp);
return (NULL);
}
- bzero(drp->dr_bitmap, sizeof (ulong_t) * n);
+ drp->dr_size = nregs;
+
return (drp);
}
Modified: stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_strtab.c
==============================================================================
--- stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_strtab.c Mon Mar
21 01:14:32 2016 (r297129)
+++ stable/9/cddl/contrib/opensolaris/lib/libdtrace/common/dt_strtab.c Mon Mar
21 01:17:48 2016 (r297130)
@@ -24,6 +24,10 @@
* Use is subject to license terms.
*/
+/*
+ * Portions Copyright 2016 Pedro Giffuni. All rights reserved.
+ */
+
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
@@ -70,12 +74,11 @@ dt_strtab_create(size_t bufsz)
return (NULL);
bzero(sp, sizeof (dt_strtab_t));
- sp->str_hash = malloc(nbuckets * sizeof (dt_strhash_t *));
+ sp->str_hash = calloc(nbuckets, sizeof (dt_strhash_t *));
if (sp->str_hash == NULL)
goto err;
- bzero(sp->str_hash, nbuckets * sizeof (dt_strhash_t *));
sp->str_hashsz = nbuckets;
sp->str_bufs = NULL;
sp->str_ptr = NULL;
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