Date: Mon, 21 Mar 2016 01:17:48 +0000 (UTC) From: "Pedro F. Giffuni" <pfg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r297130 - stable/9/cddl/contrib/opensolaris/lib/libdtrace/common Message-ID: <201603210117.u2L1Hm0f054133@repo.freebsd.org>
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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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