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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_regset.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 2012 by Delphix. All rights reserved.
 * Copyright (c) 2016 Pedro Giffuni.  All rights reserved.
 */

#include <sys/types.h>
#include <sys/bitmap.h>
#include <assert.h>
#include <strings.h>
#include <stdlib.h>

#include <dt_regset.h>
#include <dt_impl.h>

dt_regset_t *
dt_regset_create(ulong_t nregs)
{
	ulong_t n = BT_BITOUL(nregs);
	dt_regset_t *drp = malloc(sizeof (dt_regset_t));

if (drp == NULL)
		return (NULL);

drp->dr_bitmap = calloc(n, sizeof (ulong_t));

if (drp->dr_bitmap == NULL) {
		dt_regset_destroy(drp);
		return (NULL);
	}

drp->dr_size = nregs;

return (drp);
}

void
dt_regset_destroy(dt_regset_t *drp)
{
	free(drp->dr_bitmap);
	free(drp);
}

void
dt_regset_reset(dt_regset_t *drp)
{
	bzero(drp->dr_bitmap, sizeof (ulong_t) * BT_BITOUL(drp->dr_size));
}

void
dt_regset_assert_free(dt_regset_t *drp)
{
	int reg;
	boolean_t fail = B_FALSE;
	for (reg = 0; reg < drp->dr_size; reg++) {
		if (BT_TEST(drp->dr_bitmap, reg) != 0)  {
			dt_dprintf("%%r%d was left allocated\n", reg);
			fail = B_TRUE;
		}
	}

/*
	 * We set this during dtest runs to check for register leaks.
	 */
	if (fail && getenv("DTRACE_DEBUG_REGSET") != NULL)
		abort();
}

int
dt_regset_alloc(dt_regset_t *drp)
{
	ulong_t nbits = drp->dr_size - 1;
	ulong_t maxw = nbits >> BT_ULSHIFT;
	ulong_t wx;

for (wx = 0; wx <= maxw; wx++) {
		if (drp->dr_bitmap[wx] != ~0UL)
			break;
	}

if (wx <= maxw) {
		ulong_t maxb = (wx == maxw) ? nbits & BT_ULMASK : BT_NBIPUL - 1;
		ulong_t word = drp->dr_bitmap[wx];
		ulong_t bit, bx;
		int reg;

for (bit = 1, bx = 0; bx <= maxb; bx++, bit <<= 1) {
			if ((word & bit) == 0) {
				reg = (int)((wx << BT_ULSHIFT) | bx);
				BT_SET(drp->dr_bitmap, reg);
				return (reg);
			}
		}
	}

xyerror(D_NOREG, "Insufficient registers to generate code");
	/*NOTREACHED*/
	return (-1);
}

void
dt_regset_free(dt_regset_t *drp, int reg)
{
	assert(reg >= 0 && reg < drp->dr_size);
	assert(BT_TEST(drp->dr_bitmap, reg) != 0);
	BT_CLEAR(drp->dr_bitmap, reg);
}

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Editing: dt_regset.c

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