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usr / src / cddl / contrib / opensolaris / lib / libdtrace / common /

📁 ..
📄 drti.c(5.62 KB)
📄 dt_aggregate.c(51.43 KB)
📄 dt_as.c(13.49 KB)
📄 dt_as.h(1.89 KB)
📄 dt_buf.c(4.12 KB)
📄 dt_buf.h(2.01 KB)
📄 dt_cc.c(71.28 KB)
📄 dt_cg.c(61.79 KB)
📄 dt_consume.c(74.05 KB)
📄 dt_decl.c(30.71 KB)
📄 dt_decl.h(4.45 KB)
📄 dt_dis.c(14.65 KB)
📄 dt_dof.c(28.19 KB)
📄 dt_dof.h(2.06 KB)
📄 dt_error.c(8.15 KB)
📄 dt_errtags.h(13.26 KB)
📄 dt_grammar.y(23.18 KB)
📄 dt_handle.c(11.62 KB)
📄 dt_ident.c(26.34 KB)
📄 dt_ident.h(7.79 KB)
📄 dt_impl.h(32.49 KB)
📄 dt_inttab.c(2.56 KB)
📄 dt_inttab.h(2.28 KB)
📄 dt_lex.l(23.64 KB)
📄 dt_link.c(49.01 KB)
📄 dt_list.c(2.67 KB)
📄 dt_list.h(1.52 KB)
📄 dt_map.c(10.91 KB)
📄 dt_module.c(45.28 KB)
📄 dt_module.h(2.1 KB)
📄 dt_open.c(61.61 KB)
📄 dt_options.c(25.04 KB)
📄 dt_parser.c(144.81 KB)
📄 dt_parser.h(11.64 KB)
📄 dt_pcb.c(5.56 KB)
📄 dt_pcb.h(4.38 KB)
📄 dt_pid.c(24.9 KB)
📄 dt_pid.h(2.03 KB)
📄 dt_pq.c(2.83 KB)
📄 dt_pq.h(1.26 KB)
📄 dt_pragma.c(15.55 KB)
📄 dt_print.c(18.57 KB)
📄 dt_printf.c(55.53 KB)
📄 dt_printf.h(4.87 KB)
📄 dt_proc.c(36.39 KB)
📄 dt_proc.h(4.54 KB)
📄 dt_program.c(14.32 KB)
📄 dt_program.h(1.86 KB)
📄 dt_provider.c(22.95 KB)
📄 dt_provider.h(4.37 KB)
📄 dt_regset.c(2.88 KB)
📄 dt_regset.h(1.57 KB)
📄 dt_string.c(5.75 KB)
📄 dt_string.h(1.31 KB)
📄 dt_strtab.c(5.74 KB)
📄 dt_strtab.h(2.42 KB)
📄 dt_subr.c(22.59 KB)
📄 dt_sugar.c(13.71 KB)
📄 dt_work.c(8.12 KB)
📄 dt_xlator.c(11.3 KB)
📄 dt_xlator.h(3.09 KB)
📄 dtrace.h(23.64 KB)
📄 mkerrno.sh(1.2 KB)
📄 mkerrtags.sh(1.4 KB)
📄 mknames.sh(1.33 KB)
📄 mksignal.sh(1.22 KB)

Editing: dt_strtab.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * 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>
#include <sys/sysmacros.h>
#include <strings.h>
#include <stdlib.h>
#include <assert.h>

#include <dt_strtab.h>
#include <dt_impl.h>

static int
dt_strtab_grow(dt_strtab_t *sp)
{
	char *ptr, **bufs;

if ((ptr = malloc(sp->str_bufsz)) == NULL)
		return (-1);

bufs = realloc(sp->str_bufs, (sp->str_nbufs + 1) * sizeof (char *));

if (bufs == NULL) {
		free(ptr);
		return (-1);
	}

sp->str_nbufs++;
	sp->str_bufs = bufs;
	sp->str_ptr = ptr;
	sp->str_bufs[sp->str_nbufs - 1] = sp->str_ptr;

return (0);
}

dt_strtab_t *
dt_strtab_create(size_t bufsz)
{
	dt_strtab_t *sp = malloc(sizeof (dt_strtab_t));
	uint_t nbuckets = _dtrace_strbuckets;

assert(bufsz != 0);

if (sp == NULL)
		return (NULL);

bzero(sp, sizeof (dt_strtab_t));
	sp->str_hash = calloc(nbuckets, sizeof (dt_strhash_t *));

if (sp->str_hash == NULL)
		goto err;

sp->str_hashsz = nbuckets;
	sp->str_bufs = NULL;
	sp->str_ptr = NULL;
	sp->str_nbufs = 0;
	sp->str_bufsz = bufsz;
	sp->str_nstrs = 1;
	sp->str_size = 1;

if (dt_strtab_grow(sp) == -1)
		goto err;

*sp->str_ptr++ = '\0';
	return (sp);

err:
	dt_strtab_destroy(sp);
	return (NULL);
}

void
dt_strtab_destroy(dt_strtab_t *sp)
{
	dt_strhash_t *hp, *hq;
	ulong_t i;

for (i = 0; i < sp->str_hashsz; i++) {
		for (hp = sp->str_hash[i]; hp != NULL; hp = hq) {
			hq = hp->str_next;
			free(hp);
		}
	}

for (i = 0; i < sp->str_nbufs; i++)
		free(sp->str_bufs[i]);

if (sp->str_hash != NULL)
		free(sp->str_hash);
	if (sp->str_bufs != NULL)
		free(sp->str_bufs);

free(sp);
}

ulong_t
dt_strtab_hash(const char *key, size_t *len)
{
	ulong_t g, h = 0;
	const char *p;
	size_t n = 0;

for (p = key; *p != '\0'; p++, n++) {
		h = (h << 4) + *p;

if ((g = (h & 0xf0000000)) != 0) {
			h ^= (g >> 24);
			h ^= g;
		}
	}

if (len != NULL)
		*len = n;

return (h);
}

static int
dt_strtab_compare(dt_strtab_t *sp, dt_strhash_t *hp,
    const char *str, size_t len)
{
	ulong_t b = hp->str_buf;
	const char *buf = hp->str_data;
	size_t resid, n;
	int rv;

while (len != 0) {
		if (buf == sp->str_bufs[b] + sp->str_bufsz)
			buf = sp->str_bufs[++b];

resid = sp->str_bufs[b] + sp->str_bufsz - buf;
		n = MIN(resid, len);

if ((rv = strncmp(buf, str, n)) != 0)
			return (rv);

buf += n;
		str += n;
		len -= n;
	}

return (0);
}

static int
dt_strtab_copyin(dt_strtab_t *sp, const char *str, size_t len)
{
	char *old_p = sp->str_ptr;
	ulong_t old_n = sp->str_nbufs;

ulong_t b = sp->str_nbufs - 1;
	size_t resid, n;

while (len != 0) {
		if (sp->str_ptr == sp->str_bufs[b] + sp->str_bufsz) {
			if (dt_strtab_grow(sp) == -1)
				goto err;
			b++;
		}

resid = sp->str_bufs[b] + sp->str_bufsz - sp->str_ptr;
		n = MIN(resid, len);
		bcopy(str, sp->str_ptr, n);

sp->str_ptr += n;
		str += n;
		len -= n;
	}

return (0);

err:
	while (sp->str_nbufs != old_n)
		free(sp->str_bufs[--sp->str_nbufs]);

sp->str_ptr = old_p;
	return (-1);
}

boolean_t
dt_strtab_empty(dt_strtab_t *sp)
{
	/* Always contains "\0". */
	return (sp->str_nstrs == 1);
}

ssize_t
dt_strtab_index(dt_strtab_t *sp, const char *str)
{
	dt_strhash_t *hp;
	size_t len;
	ulong_t h;

if (str == NULL || str[0] == '\0')
		return (0); /* we keep a \0 at offset 0 to simplify things */

h = dt_strtab_hash(str, &len) % sp->str_hashsz;

for (hp = sp->str_hash[h]; hp != NULL; hp = hp->str_next) {
		if (dt_strtab_compare(sp, hp, str, len + 1) == 0)
			return (hp->str_off);
	}

return (-1);
}

ssize_t
dt_strtab_insert(dt_strtab_t *sp, const char *str)
{
	dt_strhash_t *hp;
	size_t len;
	ssize_t off;
	ulong_t h;

if ((off = dt_strtab_index(sp, str)) != -1)
		return (off);

h = dt_strtab_hash(str, &len) % sp->str_hashsz;

/*
	 * Create a new hash bucket, initialize it, and insert it at the front
	 * of the hash chain for the appropriate bucket.
	 */
	if ((hp = malloc(sizeof (dt_strhash_t))) == NULL)
		return (-1L);

hp->str_data = sp->str_ptr;
	hp->str_buf = sp->str_nbufs - 1;
	hp->str_off = sp->str_size;
	hp->str_len = len;
	hp->str_next = sp->str_hash[h];

/*
	 * Now copy the string data into our buffer list, and then update
	 * the global counts of strings and bytes.  Return str's byte offset.
	 */
	if (dt_strtab_copyin(sp, str, len + 1) == -1) {
		free(hp);
		return (-1L);
	}

sp->str_nstrs++;
	sp->str_size += len + 1;
	sp->str_hash[h] = hp;

return (hp->str_off);
}

size_t
dt_strtab_size(const dt_strtab_t *sp)
{
	return (sp->str_size);
}

ssize_t
dt_strtab_write(const dt_strtab_t *sp, dt_strtab_write_f *func, void *private)
{
	ssize_t res, total = 0;
	ulong_t i;
	size_t n;

for (i = 0; i < sp->str_nbufs; i++, total += res) {
		if (i == sp->str_nbufs - 1)
			n = sp->str_ptr - sp->str_bufs[i];
		else
			n = sp->str_bufsz;

if ((res = func(sp->str_bufs[i], n, total, private)) <= 0)
			break;
	}

if (total == 0 && sp->str_size != 0)
		return (-1);

return (total);
}

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Editing: dt_strtab.c

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