Vendor import of libraries for DTrace from OpenSolaris.

1 files changed, 1127 insertions, 0 deletions

diff --git a/lib/libdtrace/common/dt_decl.c b/lib/libdtrace/common/dt_decl.c
new file mode 100644
index 000000000000..bb779840406c
--- /dev/null
+++ b/lib/libdtrace/common/dt_decl.c
@@ -0,0 +1,1127 @@
+/*
+ * 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 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <strings.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <alloca.h>
+#include <assert.h>
+
+#include <dt_decl.h>
+#include <dt_parser.h>
+#include <dt_module.h>
+#include <dt_impl.h>
+
+static dt_decl_t *
+dt_decl_check(dt_decl_t *ddp)
+{
+	if (ddp->dd_kind == CTF_K_UNKNOWN)
+		return (ddp); /* nothing to check if the type is not yet set */
+
+	if (ddp->dd_name != NULL && strcmp(ddp->dd_name, "char") == 0 &&
+	    (ddp->dd_attr & (DT_DA_SHORT | DT_DA_LONG | DT_DA_LONGLONG))) {
+		xyerror(D_DECL_CHARATTR, "invalid type declaration: short and "
+		    "long may not be used with char type\n");
+	}
+
+	if (ddp->dd_name != NULL && strcmp(ddp->dd_name, "void") == 0 &&
+	    (ddp->dd_attr & (DT_DA_SHORT | DT_DA_LONG | DT_DA_LONGLONG |
+	    (DT_DA_SIGNED | DT_DA_UNSIGNED)))) {
+		xyerror(D_DECL_VOIDATTR, "invalid type declaration: attributes "
+		    "may not be used with void type\n");
+	}
+
+	if (ddp->dd_kind != CTF_K_INTEGER &&
+	    (ddp->dd_attr & (DT_DA_SIGNED | DT_DA_UNSIGNED))) {
+		xyerror(D_DECL_SIGNINT, "invalid type declaration: signed and "
+		    "unsigned may only be used with integer type\n");
+	}
+
+	if (ddp->dd_kind != CTF_K_INTEGER && ddp->dd_kind != CTF_K_FLOAT &&
+	    (ddp->dd_attr & (DT_DA_LONG | DT_DA_LONGLONG))) {
+		xyerror(D_DECL_LONGINT, "invalid type declaration: long and "
+		    "long long may only be used with integer or "
+		    "floating-point type\n");
+	}
+
+	return (ddp);
+}
+
+dt_decl_t *
+dt_decl_alloc(ushort_t kind, char *name)
+{
+	dt_decl_t *ddp = malloc(sizeof (dt_decl_t));
+
+	if (ddp == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
+
+	ddp->dd_kind = kind;
+	ddp->dd_attr = 0;
+	ddp->dd_ctfp = NULL;
+	ddp->dd_type = CTF_ERR;
+	ddp->dd_name = name;
+	ddp->dd_node = NULL;
+	ddp->dd_next = NULL;
+
+	return (ddp);
+}
+
+void
+dt_decl_free(dt_decl_t *ddp)
+{
+	dt_decl_t *ndp;
+
+	for (; ddp != NULL; ddp = ndp) {
+		ndp = ddp->dd_next;
+		free(ddp->dd_name);
+		dt_node_list_free(&ddp->dd_node);
+		free(ddp);
+	}
+}
+
+void
+dt_decl_reset(void)
+{
+	dt_scope_t *dsp = &yypcb->pcb_dstack;
+	dt_decl_t *ddp = dsp->ds_decl;
+
+	while (ddp->dd_next != NULL) {
+		dsp->ds_decl = ddp->dd_next;
+		ddp->dd_next = NULL;
+		dt_decl_free(ddp);
+		ddp = dsp->ds_decl;
+	}
+}
+
+dt_decl_t *
+dt_decl_push(dt_decl_t *ddp)
+{
+	dt_scope_t *dsp = &yypcb->pcb_dstack;
+	dt_decl_t *top = dsp->ds_decl;
+
+	if (top != NULL &&
+	    top->dd_kind == CTF_K_UNKNOWN && top->dd_name == NULL) {
+		top->dd_kind = CTF_K_INTEGER;
+		(void) dt_decl_check(top);
+	}
+
+	assert(ddp->dd_next == NULL);
+	ddp->dd_next = top;
+	dsp->ds_decl = ddp;
+
+	return (ddp);
+}
+
+dt_decl_t *
+dt_decl_pop(void)
+{
+	dt_scope_t *dsp = &yypcb->pcb_dstack;
+	dt_decl_t *ddp = dt_decl_top();
+
+	dsp->ds_decl = NULL;
+	free(dsp->ds_ident);
+	dsp->ds_ident = NULL;
+	dsp->ds_ctfp = NULL;
+	dsp->ds_type = CTF_ERR;
+	dsp->ds_class = DT_DC_DEFAULT;
+	dsp->ds_enumval = -1;
+
+	return (ddp);
+}
+
+dt_decl_t *
+dt_decl_pop_param(char **idp)
+{
+	dt_scope_t *dsp = &yypcb->pcb_dstack;
+
+	if (dsp->ds_class != DT_DC_DEFAULT && dsp->ds_class != DT_DC_REGISTER) {
+		xyerror(D_DECL_PARMCLASS, "inappropriate storage class "
+		    "for function or associative array parameter\n");
+	}
+
+	if (idp != NULL && dt_decl_top() != NULL) {
+		*idp = dsp->ds_ident;
+		dsp->ds_ident = NULL;
+	}
+
+	return (dt_decl_pop());
+}
+
+dt_decl_t *
+dt_decl_top(void)
+{
+	dt_decl_t *ddp = yypcb->pcb_dstack.ds_decl;
+
+	if (ddp == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NODECL);
+
+	if (ddp->dd_kind == CTF_K_UNKNOWN && ddp->dd_name == NULL) {
+		ddp->dd_kind = CTF_K_INTEGER;
+		(void) dt_decl_check(ddp);
+	}
+
+	return (ddp);
+}
+
+dt_decl_t *
+dt_decl_ident(char *name)
+{
+	dt_scope_t *dsp = &yypcb->pcb_dstack;
+	dt_decl_t *ddp = dsp->ds_decl;
+
+	if (dsp->ds_ident != NULL) {
+		free(name);
+		xyerror(D_DECL_IDENT, "old-style declaration or "
+		    "incorrect type specified\n");
+	}
+
+	dsp->ds_ident = name;
+
+	if (ddp == NULL)
+		ddp = dt_decl_push(dt_decl_alloc(CTF_K_UNKNOWN, NULL));
+
+	return (ddp);
+}
+
+void
+dt_decl_class(dt_dclass_t class)
+{
+	dt_scope_t *dsp = &yypcb->pcb_dstack;
+
+	if (dsp->ds_class != DT_DC_DEFAULT) {
+		xyerror(D_DECL_CLASS, "only one storage class allowed "
+		    "in a declaration\n");
+	}
+
+	dsp->ds_class = class;
+}
+
+/*
+ * Set the kind and name of the current declaration.  If none is allocated,
+ * make a new decl and push it on to the top of our stack.  If the name or kind
+ * is already set for the current decl, then we need to fail this declaration.
+ * This can occur because too many types were given (e.g. "int int"), etc.
+ */
+dt_decl_t *
+dt_decl_spec(ushort_t kind, char *name)
+{
+	dt_decl_t *ddp = yypcb->pcb_dstack.ds_decl;
+
+	if (ddp == NULL)
+		return (dt_decl_push(dt_decl_alloc(kind, name)));
+
+	/*
+	 * If we already have a type name specified and we see another type
+	 * name, this is an error if the declaration is a typedef.  If the
+	 * declaration is not a typedef, then the user may be trying to declare
+	 * a variable whose name has been returned by lex as a TNAME token:
+	 * call dt_decl_ident() as if the grammar's IDENT rule was matched.
+	 */
+	if (ddp->dd_name != NULL && kind == CTF_K_TYPEDEF) {
+		if (yypcb->pcb_dstack.ds_class != DT_DC_TYPEDEF)
+			return (dt_decl_ident(name));
+		xyerror(D_DECL_IDRED, "identifier redeclared: %s\n", name);
+	}
+
+	if (ddp->dd_name != NULL || ddp->dd_kind != CTF_K_UNKNOWN)
+		xyerror(D_DECL_COMBO, "invalid type combination\n");
+
+	ddp->dd_kind = kind;
+	ddp->dd_name = name;
+
+	if (name != NULL && strchr(name, '`') != NULL) {
+		xyerror(D_DECL_SCOPE, "D scoping operator may not be used "
+		    "in a type name\n");
+	}
+
+	return (dt_decl_check(ddp));
+}
+
+dt_decl_t *
+dt_decl_attr(ushort_t attr)
+{
+	dt_decl_t *ddp = yypcb->pcb_dstack.ds_decl;
+
+	if (ddp == NULL) {
+		ddp = dt_decl_push(dt_decl_alloc(CTF_K_UNKNOWN, NULL));
+		ddp->dd_attr = attr;
+		return (ddp);
+	}
+
+	if (attr == DT_DA_LONG && (ddp->dd_attr & DT_DA_LONG)) {
+		ddp->dd_attr &= ~DT_DA_LONG;
+		attr = DT_DA_LONGLONG;
+	}
+
+	ddp->dd_attr |= attr;
+	return (dt_decl_check(ddp));
+}
+
+/*
+ * Examine the list of formal parameters 'flist' and determine if the formal
+ * name fnp->dn_string is defined in this list (B_TRUE) or not (B_FALSE).
+ * If 'fnp' is in 'flist', do not search beyond 'fnp' itself in 'flist'.
+ */
+static int
+dt_decl_protoform(dt_node_t *fnp, dt_node_t *flist)
+{
+	dt_node_t *dnp;
+
+	for (dnp = flist; dnp != fnp && dnp != NULL; dnp = dnp->dn_list) {
+		if (dnp->dn_string != NULL &&
+		    strcmp(dnp->dn_string, fnp->dn_string) == 0)
+			return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+/*
+ * Common code for parsing array, function, and probe definition prototypes.
+ * The prototype node list is specified as 'plist'.  The formal prototype
+ * against which to compare the prototype is specified as 'flist'.  If plist
+ * and flist are the same, we require that named parameters are unique.  If
+ * plist and flist are different, we require that named parameters in plist
+ * match a name that is present in flist.
+ */
+int
+dt_decl_prototype(dt_node_t *plist,
+    dt_node_t *flist, const char *kind, uint_t flags)
+{
+	char n[DT_TYPE_NAMELEN];
+	int is_void, v = 0, i = 1;
+	int form = plist != flist;
+	dt_node_t *dnp;
+
+	for (dnp = plist; dnp != NULL; dnp = dnp->dn_list, i++) {
+
+		if (dnp->dn_type == CTF_ERR && !(flags & DT_DP_VARARGS)) {
+			dnerror(dnp, D_DECL_PROTO_VARARGS, "%s prototype may "
+			    "not use a variable-length argument list\n", kind);
+		}
+
+		if (dt_node_is_dynamic(dnp) && !(flags & DT_DP_DYNAMIC)) {
+			dnerror(dnp, D_DECL_PROTO_TYPE, "%s prototype may not "
+			    "use parameter of type %s: %s, parameter #%d\n",
+			    kind, dt_node_type_name(dnp, n, sizeof (n)),
+			    dnp->dn_string ? dnp->dn_string : "(anonymous)", i);
+		}
+
+		is_void = dt_node_is_void(dnp);
+		v += is_void;
+
+		if (is_void && !(flags & DT_DP_VOID)) {
+			dnerror(dnp, D_DECL_PROTO_TYPE, "%s prototype may not "
+			    "use parameter of type %s: %s, parameter #%d\n",
+			    kind, dt_node_type_name(dnp, n, sizeof (n)),
+			    dnp->dn_string ? dnp->dn_string : "(anonymous)", i);
+		}
+
+		if (is_void && dnp->dn_string != NULL) {
+			dnerror(dnp, D_DECL_PROTO_NAME, "void parameter may "
+			    "not have a name: %s\n", dnp->dn_string);
+		}
+
+		if (dnp->dn_string != NULL &&
+		    dt_decl_protoform(dnp, flist) != form) {
+			dnerror(dnp, D_DECL_PROTO_FORM, "parameter is "
+			    "%s declared in %s prototype: %s, parameter #%d\n",
+			    form ? "not" : "already", kind, dnp->dn_string, i);
+		}
+
+		if (dnp->dn_string == NULL &&
+		    !is_void && !(flags & DT_DP_ANON)) {
+			dnerror(dnp, D_DECL_PROTO_NAME, "parameter declaration "
+			    "requires a name: parameter #%d\n", i);
+		}
+	}
+
+	if (v != 0 && plist->dn_list != NULL)
+		xyerror(D_DECL_PROTO_VOID, "void must be sole parameter\n");
+
+	return (v ? 0 : i - 1); /* return zero if sole parameter is 'void' */
+}
+
+dt_decl_t *
+dt_decl_array(dt_node_t *dnp)
+{
+	dt_decl_t *ddp = dt_decl_push(dt_decl_alloc(CTF_K_ARRAY, NULL));
+	dt_scope_t *dsp = &yypcb->pcb_dstack;
+	dt_decl_t *ndp = ddp;
+
+	/*
+	 * After pushing the array on to the decl stack, scan ahead for multi-
+	 * dimensional array declarations and push the current decl to the
+	 * bottom to match the resulting CTF type tree and data layout.  Refer
+	 * to the comments in dt_decl_type() and ISO C 6.5.2.1 for more info.
+	 */
+	while (ndp->dd_next != NULL && ndp->dd_next->dd_kind == CTF_K_ARRAY)
+		ndp = ndp->dd_next; /* skip to bottom-most array declaration */
+
+	if (ndp != ddp) {
+		if (dnp != NULL && dnp->dn_kind == DT_NODE_TYPE) {
+			xyerror(D_DECL_DYNOBJ,
+			    "cannot declare array of associative arrays\n");
+		}
+		dsp->ds_decl = ddp->dd_next;
+		ddp->dd_next = ndp->dd_next;
+		ndp->dd_next = ddp;
+	}
+
+	if (ddp->dd_next->dd_name != NULL &&
+	    strcmp(ddp->dd_next->dd_name, "void") == 0)
+		xyerror(D_DECL_VOIDOBJ, "cannot declare array of void\n");
+
+	if (dnp != NULL && dnp->dn_kind != DT_NODE_TYPE) {
+		dnp = ddp->dd_node = dt_node_cook(dnp, DT_IDFLG_REF);
+
+		if (dt_node_is_posconst(dnp) == 0) {
+			xyerror(D_DECL_ARRSUB, "positive integral constant "
+			    "expression or tuple signature expected as "
+			    "array declaration subscript\n");
+		}
+
+		if (dnp->dn_value > UINT_MAX)
+			xyerror(D_DECL_ARRBIG, "array dimension too big\n");
+
+	} else if (dnp != NULL) {
+		ddp->dd_node = dnp;
+		(void) dt_decl_prototype(dnp, dnp, "array", DT_DP_ANON);
+	}
+
+	return (ddp);
+}
+
+/*
+ * When a function is declared, we need to fudge the decl stack a bit if the
+ * declaration uses the function pointer (*)() syntax.  In this case, the
+ * dt_decl_func() call occurs *after* the dt_decl_ptr() call, even though the
+ * resulting type is "pointer to function".  To make the pointer land on top,
+ * we check to see if 'pdp' is non-NULL and a pointer.  If it is, we search
+ * backward for a decl tagged with DT_DA_PAREN, and if one is found, the func
+ * decl is inserted behind this node in the decl list instead of at the top.
+ * In all cases, the func decl's dd_next pointer is set to the decl chain
+ * for the function's return type and the function parameter list is discarded.
+ */
+dt_decl_t *
+dt_decl_func(dt_decl_t *pdp, dt_node_t *dnp)
+{
+	dt_decl_t *ddp = dt_decl_alloc(CTF_K_FUNCTION, NULL);
+
+	ddp->dd_node = dnp;
+
+	(void) dt_decl_prototype(dnp, dnp, "function",
+	    DT_DP_VARARGS | DT_DP_VOID | DT_DP_ANON);
+
+	if (pdp == NULL || pdp->dd_kind != CTF_K_POINTER)
+		return (dt_decl_push(ddp));
+
+	while (pdp->dd_next != NULL && !(pdp->dd_next->dd_attr & DT_DA_PAREN))
+		pdp = pdp->dd_next;
+
+	if (pdp->dd_next == NULL)
+		return (dt_decl_push(ddp));
+
+	ddp->dd_next = pdp->dd_next;
+	pdp->dd_next = ddp;
+
+	return (pdp);
+}
+
+dt_decl_t *
+dt_decl_ptr(void)
+{
+	return (dt_decl_push(dt_decl_alloc(CTF_K_POINTER, NULL)));
+}
+
+dt_decl_t *
+dt_decl_sou(uint_t kind, char *name)
+{
+	dt_decl_t *ddp = dt_decl_spec(kind, name);
+	char n[DT_TYPE_NAMELEN];
+	ctf_file_t *ctfp;
+	ctf_id_t type;
+	uint_t flag;
+
+	if (yypcb->pcb_idepth != 0)
+		ctfp = yypcb->pcb_hdl->dt_cdefs->dm_ctfp;
+	else
+		ctfp = yypcb->pcb_hdl->dt_ddefs->dm_ctfp;
+
+	if (yypcb->pcb_dstack.ds_next != NULL)
+		flag = CTF_ADD_NONROOT;
+	else
+		flag = CTF_ADD_ROOT;
+
+	(void) snprintf(n, sizeof (n), "%s %s",
+	    kind == CTF_K_STRUCT ? "struct" : "union",
+	    name == NULL ? "(anon)" : name);
+
+	if (name != NULL && (type = ctf_lookup_by_name(ctfp, n)) != CTF_ERR &&
+	    ctf_type_kind(ctfp, type) != CTF_K_FORWARD)
+		xyerror(D_DECL_TYPERED, "type redeclared: %s\n", n);
+
+	if (kind == CTF_K_STRUCT)
+		type = ctf_add_struct(ctfp, flag, name);
+	else
+		type = ctf_add_union(ctfp, flag, name);
+
+	if (type == CTF_ERR || ctf_update(ctfp) == CTF_ERR) {
+		xyerror(D_UNKNOWN, "failed to define %s: %s\n",
+		    n, ctf_errmsg(ctf_errno(ctfp)));
+	}
+
+	ddp->dd_ctfp = ctfp;
+	ddp->dd_type = type;
+
+	dt_scope_push(ctfp, type);
+	return (ddp);
+}
+
+void
+dt_decl_member(dt_node_t *dnp)
+{
+	dt_scope_t *dsp = yypcb->pcb_dstack.ds_next;
+	dt_decl_t *ddp = yypcb->pcb_dstack.ds_decl;
+	char *ident = yypcb->pcb_dstack.ds_ident;
+
+	const char *idname = ident ? ident : "(anon)";
+	char n[DT_TYPE_NAMELEN];
+
+	dtrace_typeinfo_t dtt;
+	ctf_encoding_t cte;
+	ctf_id_t base;
+	uint_t kind;
+	ssize_t size;
+
+	if (dsp == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NOSCOPE);
+
+	if (ddp == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NODECL);
+
+	if (dnp == NULL && ident == NULL)
+		xyerror(D_DECL_MNAME, "member declaration requires a name\n");
+
+	if (ddp->dd_kind == CTF_K_UNKNOWN && ddp->dd_name == NULL) {
+		ddp->dd_kind = CTF_K_INTEGER;
+		(void) dt_decl_check(ddp);
+	}
+
+	if (dt_decl_type(ddp, &dtt) != 0)
+		longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
+
+	if (ident != NULL && strchr(ident, '`') != NULL) {
+		xyerror(D_DECL_SCOPE, "D scoping operator may not be used "
+		    "in a member name (%s)\n", ident);
+	}
+
+	if (dtt.dtt_ctfp == DT_DYN_CTFP(yypcb->pcb_hdl) &&
+	    dtt.dtt_type == DT_DYN_TYPE(yypcb->pcb_hdl)) {
+		xyerror(D_DECL_DYNOBJ,
+		    "cannot have dynamic member: %s\n", ident);
+	}
+
+	base = ctf_type_resolve(dtt.dtt_ctfp, dtt.dtt_type);
+	kind = ctf_type_kind(dtt.dtt_ctfp, base);
+	size = ctf_type_size(dtt.dtt_ctfp, base);
+
+	if (kind == CTF_K_FORWARD || ((kind == CTF_K_STRUCT ||
+	    kind == CTF_K_UNION) && size == 0)) {
+		xyerror(D_DECL_INCOMPLETE, "incomplete struct/union/enum %s: "
+		    "%s\n", dt_type_name(dtt.dtt_ctfp, dtt.dtt_type,
+		    n, sizeof (n)), ident);
+	}
+
+	if (size == 0)
+		xyerror(D_DECL_VOIDOBJ, "cannot have void member: %s\n", ident);
+
+	/*
+	 * If a bit-field qualifier was part of the member declaration, create
+	 * a new integer type of the same name and attributes as the base type
+	 * and size equal to the specified number of bits.  We reset 'dtt' to
+	 * refer to this new bit-field type and continue on to add the member.
+	 */
+	if (dnp != NULL) {
+		dnp = dt_node_cook(dnp, DT_IDFLG_REF);
+
+		/*
+		 * A bit-field member with no declarator is permitted to have
+		 * size zero and indicates that no more fields are to be packed
+		 * into the current storage unit.  We ignore these directives
+		 * as the underlying ctf code currently does so for all fields.
+		 */
+		if (ident == NULL && dnp->dn_kind == DT_NODE_INT &&
+		    dnp->dn_value == 0) {
+			dt_node_free(dnp);
+			goto done;
+		}
+
+		if (dt_node_is_posconst(dnp) == 0) {
+			xyerror(D_DECL_BFCONST, "positive integral constant "
+			    "expression expected as bit-field size\n");
+		}
+
+		if (ctf_type_kind(dtt.dtt_ctfp, base) != CTF_K_INTEGER ||
+		    ctf_type_encoding(dtt.dtt_ctfp, base, &cte) == CTF_ERR ||
+		    IS_VOID(cte)) {
+			xyerror(D_DECL_BFTYPE, "invalid type for "
+			    "bit-field: %s\n", idname);
+		}
+
+		if (dnp->dn_value > cte.cte_bits) {
+			xyerror(D_DECL_BFSIZE, "bit-field too big "
+			    "for type: %s\n", idname);
+		}
+
+		cte.cte_offset = 0;
+		cte.cte_bits = (uint_t)dnp->dn_value;
+
+		dtt.dtt_type = ctf_add_integer(dsp->ds_ctfp,
+		    CTF_ADD_NONROOT, ctf_type_name(dtt.dtt_ctfp,
+		    dtt.dtt_type, n, sizeof (n)), &cte);
+
+		if (dtt.dtt_type == CTF_ERR ||
+		    ctf_update(dsp->ds_ctfp) == CTF_ERR) {
+			xyerror(D_UNKNOWN, "failed to create type for "
+			    "member '%s': %s\n", idname,
+			    ctf_errmsg(ctf_errno(dsp->ds_ctfp)));
+		}
+
+		dtt.dtt_ctfp = dsp->ds_ctfp;
+		dt_node_free(dnp);
+	}
+
+	/*
+	 * If the member type is not defined in the same CTF container as the
+	 * one associated with the current scope (i.e. the container for the
+	 * struct or union itself) or its parent, copy the member type into
+	 * this container and reset dtt to refer to the copied type.
+	 */
+	if (dtt.dtt_ctfp != dsp->ds_ctfp &&
+	    dtt.dtt_ctfp != ctf_parent_file(dsp->ds_ctfp)) {
+
+		dtt.dtt_type = ctf_add_type(dsp->ds_ctfp,
+		    dtt.dtt_ctfp, dtt.dtt_type);
+		dtt.dtt_ctfp = dsp->ds_ctfp;
+
+		if (dtt.dtt_type == CTF_ERR ||
+		    ctf_update(dtt.dtt_ctfp) == CTF_ERR) {
+			xyerror(D_UNKNOWN, "failed to copy type of '%s': %s\n",
+			    idname, ctf_errmsg(ctf_errno(dtt.dtt_ctfp)));
+		}
+	}
+
+	if (ctf_add_member(dsp->ds_ctfp, dsp->ds_type,
+	    ident, dtt.dtt_type) == CTF_ERR) {
+		xyerror(D_UNKNOWN, "failed to define member '%s': %s\n",
+		    idname, ctf_errmsg(ctf_errno(dsp->ds_ctfp)));
+	}
+
+done:
+	free(ident);
+	yypcb->pcb_dstack.ds_ident = NULL;
+	dt_decl_reset();
+}
+
+/*ARGSUSED*/
+static int
+dt_decl_hasmembers(const char *name, int value, void *private)
+{
+	return (1); /* abort search and return true if a member exists */
+}
+
+dt_decl_t *
+dt_decl_enum(char *name)
+{
+	dt_decl_t *ddp = dt_decl_spec(CTF_K_ENUM, name);
+	char n[DT_TYPE_NAMELEN];
+	ctf_file_t *ctfp;
+	ctf_id_t type;
+	uint_t flag;
+
+	if (yypcb->pcb_idepth != 0)
+		ctfp = yypcb->pcb_hdl->dt_cdefs->dm_ctfp;
+	else
+		ctfp = yypcb->pcb_hdl->dt_ddefs->dm_ctfp;
+
+	if (yypcb->pcb_dstack.ds_next != NULL)
+		flag = CTF_ADD_NONROOT;
+	else
+		flag = CTF_ADD_ROOT;
+
+	(void) snprintf(n, sizeof (n), "enum %s", name ? name : "(anon)");
+
+	if (name != NULL && (type = ctf_lookup_by_name(ctfp, n)) != CTF_ERR) {
+		if (ctf_enum_iter(ctfp, type, dt_decl_hasmembers, NULL))
+			xyerror(D_DECL_TYPERED, "type redeclared: %s\n", n);
+	} else if ((type = ctf_add_enum(ctfp, flag, name)) == CTF_ERR) {
+		xyerror(D_UNKNOWN, "failed to define %s: %s\n",
+		    n, ctf_errmsg(ctf_errno(ctfp)));
+	}
+
+	ddp->dd_ctfp = ctfp;
+	ddp->dd_type = type;
+
+	dt_scope_push(ctfp, type);
+	return (ddp);
+}
+
+void
+dt_decl_enumerator(char *s, dt_node_t *dnp)
+{
+	dt_scope_t *dsp = yypcb->pcb_dstack.ds_next;
+	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
+
+	dt_idnode_t *inp;
+	dt_ident_t *idp;
+	char *name;
+	int value;
+
+	name = alloca(strlen(s) + 1);
+	(void) strcpy(name, s);
+	free(s);
+
+	if (dsp == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NOSCOPE);
+
+	assert(dsp->ds_decl->dd_kind == CTF_K_ENUM);
+	value = dsp->ds_enumval + 1; /* default is previous value plus one */
+
+	if (strchr(name, '`') != NULL) {
+		xyerror(D_DECL_SCOPE, "D scoping operator may not be used in "
+		    "an enumerator name (%s)\n", name);
+	}
+
+	/*
+	 * If the enumerator is being assigned a value, cook and check the node
+	 * and then free it after we get the value.  We also permit references
+	 * to identifiers which are previously defined enumerators in the type.
+	 */
+	if (dnp != NULL) {
+		if (dnp->dn_kind != DT_NODE_IDENT || ctf_enum_value(
+		    dsp->ds_ctfp, dsp->ds_type, dnp->dn_string, &value) != 0) {
+			dnp = dt_node_cook(dnp, DT_IDFLG_REF);
+
+			if (dnp->dn_kind != DT_NODE_INT) {
+				xyerror(D_DECL_ENCONST, "enumerator '%s' must "
+				    "be assigned to an integral constant "
+				    "expression\n", name);
+			}
+
+			if ((intmax_t)dnp->dn_value > INT_MAX ||
+			    (intmax_t)dnp->dn_value < INT_MIN) {
+				xyerror(D_DECL_ENOFLOW, "enumerator '%s' value "
+				    "overflows INT_MAX (%d)\n", name, INT_MAX);
+			}
+
+			value = (int)dnp->dn_value;
+		}
+		dt_node_free(dnp);
+	}
+
+	if (ctf_add_enumerator(dsp->ds_ctfp, dsp->ds_type,
+	    name, value) == CTF_ERR || ctf_update(dsp->ds_ctfp) == CTF_ERR) {
+		xyerror(D_UNKNOWN, "failed to define enumerator '%s': %s\n",
+		    name, ctf_errmsg(ctf_errno(dsp->ds_ctfp)));
+	}
+
+	dsp->ds_enumval = value; /* save most recent value */
+
+	/*
+	 * If the enumerator name matches an identifier in the global scope,
+	 * flag this as an error.  We only do this for "D" enumerators to
+	 * prevent "C" header file enumerators from conflicting with the ever-
+	 * growing list of D built-in global variables and inlines.  If a "C"
+	 * enumerator conflicts with a global identifier, we add the enumerator
+	 * but do not insert a corresponding inline (i.e. the D variable wins).
+	 */
+	if (dt_idstack_lookup(&yypcb->pcb_globals, name) != NULL) {
+		if (dsp->ds_ctfp == dtp->dt_ddefs->dm_ctfp) {
+			xyerror(D_DECL_IDRED,
+			    "identifier redeclared: %s\n", name);
+		} else
+			return;
+	}
+
+	dt_dprintf("add global enumerator %s = %d\n", name, value);
+
+	idp = dt_idhash_insert(dtp->dt_globals, name, DT_IDENT_ENUM,
+	    DT_IDFLG_INLINE | DT_IDFLG_REF, 0, _dtrace_defattr, 0,
+	    &dt_idops_inline, NULL, dtp->dt_gen);
+
+	if (idp == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
+
+	yyintprefix = 0;
+	yyintsuffix[0] = '\0';
+	yyintdecimal = 0;
+
+	dnp = dt_node_int(value);
+	dt_node_type_assign(dnp, dsp->ds_ctfp, dsp->ds_type);
+
+	if ((inp = malloc(sizeof (dt_idnode_t))) == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
+
+	/*
+	 * Remove the INT node from the node allocation list and store it in
+	 * din_list and din_root so it persists with and is freed by the ident.
+	 */
+	assert(yypcb->pcb_list == dnp);
+	yypcb->pcb_list = dnp->dn_link;
+	dnp->dn_link = NULL;
+
+	bzero(inp, sizeof (dt_idnode_t));
+	inp->din_list = dnp;
+	inp->din_root = dnp;
+
+	idp->di_iarg = inp;
+	idp->di_ctfp = dsp->ds_ctfp;
+	idp->di_type = dsp->ds_type;
+}
+
+/*
+ * Look up the type corresponding to the specified decl stack.  The scoping of
+ * the underlying type names is handled by dt_type_lookup().  We build up the
+ * name from the specified string and prefixes and then lookup the type.  If
+ * we fail, an errmsg is saved and the caller must abort with EDT_COMPILER.
+ */
+int
+dt_decl_type(dt_decl_t *ddp, dtrace_typeinfo_t *tip)
+{
+	dtrace_hdl_t *dtp = yypcb->pcb_hdl;
+
+	dt_module_t *dmp;
+	ctf_arinfo_t r;
+	ctf_id_t type;
+
+	char n[DT_TYPE_NAMELEN];
+	uint_t flag;
+	char *name;
+	int rv;
+
+	/*
+	 * Based on our current #include depth and decl stack depth, determine
+	 * which dynamic CTF module and scope to use when adding any new types.
+	 */
+	dmp = yypcb->pcb_idepth ? dtp->dt_cdefs : dtp->dt_ddefs;
+	flag = yypcb->pcb_dstack.ds_next ? CTF_ADD_NONROOT : CTF_ADD_ROOT;
+
+	/*
+	 * If we have already cached a CTF type for this decl, then we just
+	 * return the type information for the cached type.
+	 */
+	if (ddp->dd_ctfp != NULL &&
+	    (dmp = dt_module_lookup_by_ctf(dtp, ddp->dd_ctfp)) != NULL) {
+		tip->dtt_object = dmp->dm_name;
+		tip->dtt_ctfp = ddp->dd_ctfp;
+		tip->dtt_type = ddp->dd_type;
+		return (0);
+	}
+
+	/*
+	 * Currently CTF treats all function pointers identically.  We cache a
+	 * representative ID of kind CTF_K_FUNCTION and just return that type.
+	 * If we want to support full function declarations, dd_next refers to
+	 * the declaration of the function return type, and the parameter list
+	 * should be parsed and hung off a new pointer inside of this decl.
+	 */
+	if (ddp->dd_kind == CTF_K_FUNCTION) {
+		tip->dtt_object = dtp->dt_ddefs->dm_name;
+		tip->dtt_ctfp = DT_FUNC_CTFP(dtp);
+		tip->dtt_type = DT_FUNC_TYPE(dtp);
+		return (0);
+	}
+
+	/*
+	 * If the decl is a pointer, resolve the rest of the stack by calling
+	 * dt_decl_type() recursively and then compute a pointer to the result.
+	 * Similar to the code above, we return a cached id for function ptrs.
+	 */
+	if (ddp->dd_kind == CTF_K_POINTER) {
+		if (ddp->dd_next->dd_kind == CTF_K_FUNCTION) {
+			tip->dtt_object = dtp->dt_ddefs->dm_name;
+			tip->dtt_ctfp = DT_FPTR_CTFP(dtp);
+			tip->dtt_type = DT_FPTR_TYPE(dtp);
+			return (0);
+		}
+
+		if ((rv = dt_decl_type(ddp->dd_next, tip)) == 0 &&
+		    (rv = dt_type_pointer(tip)) != 0) {
+			xywarn(D_UNKNOWN, "cannot find type: %s*: %s\n",
+			    dt_type_name(tip->dtt_ctfp, tip->dtt_type,
+			    n, sizeof (n)), ctf_errmsg(dtp->dt_ctferr));
+		}
+
+		return (rv);
+	}
+
+	/*
+	 * If the decl is an array, we must find the base type and then call
+	 * dt_decl_type() recursively and then build an array of the result.
+	 * The C and D multi-dimensional array syntax requires that consecutive
+	 * array declarations be processed from right-to-left (i.e. top-down
+	 * from the perspective of the declaration stack).  For example, an
+	 * array declaration such as int x[3][5] is stored on the stack as:
+	 *
+	 * (bottom) NULL <- ( INT "int" ) <- ( ARR [3] ) <- ( ARR [5] ) (top)
+	 *
+	 * but means that x is declared to be an array of 3 objects each of
+	 * which is an array of 5 integers, or in CTF representation:
+	 *
+	 * type T1:( content=int, nelems=5 ) type T2:( content=T1, nelems=3 )
+	 *
+	 * For more details, refer to K&R[5.7] and ISO C 6.5.2.1.  Rather than
+	 * overcomplicate the implementation of dt_decl_type(), we push array
+	 * declarations down into the stack in dt_decl_array(), above, so that
+	 * by the time dt_decl_type() is called, the decl stack looks like:
+	 *
+	 * (bottom) NULL <- ( INT "int" ) <- ( ARR [5] ) <- ( ARR [3] ) (top)
+	 *
+	 * which permits a straightforward recursive descent of the decl stack
+	 * to build the corresponding CTF type tree in the appropriate order.
+	 */
+	if (ddp->dd_kind == CTF_K_ARRAY) {
+		/*
+		 * If the array decl has a parameter list associated with it,
+		 * this is an associative array declaration: return <DYN>.
+		 */
+		if (ddp->dd_node != NULL &&
+		    ddp->dd_node->dn_kind == DT_NODE_TYPE) {
+			tip->dtt_object = dtp->dt_ddefs->dm_name;
+			tip->dtt_ctfp = DT_DYN_CTFP(dtp);
+			tip->dtt_type = DT_DYN_TYPE(dtp);
+			return (0);
+		}
+
+		if ((rv = dt_decl_type(ddp->dd_next, tip)) != 0)
+			return (rv);
+
+		/*
+		 * If the array base type is not defined in the target
+		 * container or its parent, copy the type to the target
+		 * container and reset dtt_ctfp and dtt_type to the copy.
+		 */
+		if (tip->dtt_ctfp != dmp->dm_ctfp &&
+		    tip->dtt_ctfp != ctf_parent_file(dmp->dm_ctfp)) {
+
+			tip->dtt_type = ctf_add_type(dmp->dm_ctfp,
+			    tip->dtt_ctfp, tip->dtt_type);
+			tip->dtt_ctfp = dmp->dm_ctfp;
+
+			if (tip->dtt_type == CTF_ERR ||
+			    ctf_update(tip->dtt_ctfp) == CTF_ERR) {
+				xywarn(D_UNKNOWN, "failed to copy type: %s\n",
+				    ctf_errmsg(ctf_errno(tip->dtt_ctfp)));
+				return (-1);
+			}
+		}
+
+		/*
+		 * The array index type is irrelevant in C and D: just set it
+		 * to "long" for all array types that we create on-the-fly.
+		 */
+		r.ctr_contents = tip->dtt_type;
+		r.ctr_index = ctf_lookup_by_name(tip->dtt_ctfp, "long");
+		r.ctr_nelems = ddp->dd_node ?
+		    (uint_t)ddp->dd_node->dn_value : 0;
+
+		tip->dtt_object = dmp->dm_name;
+		tip->dtt_ctfp = dmp->dm_ctfp;
+		tip->dtt_type = ctf_add_array(dmp->dm_ctfp, CTF_ADD_ROOT, &r);
+
+		if (tip->dtt_type == CTF_ERR ||
+		    ctf_update(tip->dtt_ctfp) == CTF_ERR) {
+			xywarn(D_UNKNOWN, "failed to create array type: %s\n",
+			    ctf_errmsg(ctf_errno(tip->dtt_ctfp)));
+			return (-1);
+		}
+
+		return (0);
+	}
+
+	/*
+	 * Allocate space for the type name and enough space for the maximum
+	 * additional text ("unsigned long long \0" requires 20 more bytes).
+	 */
+	name = alloca(ddp->dd_name ? strlen(ddp->dd_name) + 20 : 20);
+	name[0] = '\0';
+
+	switch (ddp->dd_kind) {
+	case CTF_K_INTEGER:
+	case CTF_K_FLOAT:
+		if (ddp->dd_attr & DT_DA_SIGNED)
+			(void) strcat(name, "signed ");
+		if (ddp->dd_attr & DT_DA_UNSIGNED)
+			(void) strcat(name, "unsigned ");
+		if (ddp->dd_attr & DT_DA_SHORT)
+			(void) strcat(name, "short ");
+		if (ddp->dd_attr & DT_DA_LONG)
+			(void) strcat(name, "long ");
+		if (ddp->dd_attr & DT_DA_LONGLONG)
+			(void) strcat(name, "long long ");
+		if (ddp->dd_attr == 0 && ddp->dd_name == NULL)
+			(void) strcat(name, "int");
+		break;
+	case CTF_K_STRUCT:
+		(void) strcpy(name, "struct ");
+		break;
+	case CTF_K_UNION:
+		(void) strcpy(name, "union ");
+		break;
+	case CTF_K_ENUM:
+		(void) strcpy(name, "enum ");
+		break;
+	case CTF_K_TYPEDEF:
+		break;
+	default:
+		xywarn(D_UNKNOWN, "internal error -- "
+		    "bad decl kind %u\n", ddp->dd_kind);
+		return (-1);
+	}
+
+	/*
+	 * Add dd_name unless a short, long, or long long is explicitly
+	 * suffixed by int.  We use the C/CTF canonical names for integers.
+	 */
+	if (ddp->dd_name != NULL && (ddp->dd_kind != CTF_K_INTEGER ||
+	    (ddp->dd_attr & (DT_DA_SHORT | DT_DA_LONG | DT_DA_LONGLONG)) == 0))
+		(void) strcat(name, ddp->dd_name);
+
+	/*
+	 * Lookup the type.  If we find it, we're done.  Otherwise create a
+	 * forward tag for the type if it is a struct, union, or enum.  If
+	 * we can't find it and we can't create a tag, return failure.
+	 */
+	if ((rv = dt_type_lookup(name, tip)) == 0)
+		return (rv);
+
+	switch (ddp->dd_kind) {
+	case CTF_K_STRUCT:
+	case CTF_K_UNION:
+	case CTF_K_ENUM:
+		type = ctf_add_forward(dmp->dm_ctfp, flag,
+		    ddp->dd_name, ddp->dd_kind);
+		break;
+	default:
+		xywarn(D_UNKNOWN, "failed to resolve type %s: %s\n", name,
+		    dtrace_errmsg(dtp, dtrace_errno(dtp)));
+		return (rv);
+	}
+
+	if (type == CTF_ERR || ctf_update(dmp->dm_ctfp) == CTF_ERR) {
+		xywarn(D_UNKNOWN, "failed to add forward tag for %s: %s\n",
+		    name, ctf_errmsg(ctf_errno(dmp->dm_ctfp)));
+		return (-1);
+	}
+
+	ddp->dd_ctfp = dmp->dm_ctfp;
+	ddp->dd_type = type;
+
+	tip->dtt_object = dmp->dm_name;
+	tip->dtt_ctfp = dmp->dm_ctfp;
+	tip->dtt_type = type;
+
+	return (0);
+}
+
+void
+dt_scope_create(dt_scope_t *dsp)
+{
+	dsp->ds_decl = NULL;
+	dsp->ds_next = NULL;
+	dsp->ds_ident = NULL;
+	dsp->ds_ctfp = NULL;
+	dsp->ds_type = CTF_ERR;
+	dsp->ds_class = DT_DC_DEFAULT;
+	dsp->ds_enumval = -1;
+}
+
+void
+dt_scope_destroy(dt_scope_t *dsp)
+{
+	dt_scope_t *nsp;
+
+	for (; dsp != NULL; dsp = nsp) {
+		dt_decl_free(dsp->ds_decl);
+		free(dsp->ds_ident);
+		nsp = dsp->ds_next;
+		if (dsp != &yypcb->pcb_dstack)
+			free(dsp);
+	}
+}
+
+void
+dt_scope_push(ctf_file_t *ctfp, ctf_id_t type)
+{
+	dt_scope_t *rsp = &yypcb->pcb_dstack;
+	dt_scope_t *dsp = malloc(sizeof (dt_scope_t));
+
+	if (dsp == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
+
+	dsp->ds_decl = rsp->ds_decl;
+	dsp->ds_next = rsp->ds_next;
+	dsp->ds_ident = rsp->ds_ident;
+	dsp->ds_ctfp = ctfp;
+	dsp->ds_type = type;
+	dsp->ds_class = rsp->ds_class;
+	dsp->ds_enumval = rsp->ds_enumval;
+
+	dt_scope_create(rsp);
+	rsp->ds_next = dsp;
+}
+
+dt_decl_t *
+dt_scope_pop(void)
+{
+	dt_scope_t *rsp = &yypcb->pcb_dstack;
+	dt_scope_t *dsp = rsp->ds_next;
+
+	if (dsp == NULL)
+		longjmp(yypcb->pcb_jmpbuf, EDT_NOSCOPE);
+
+	if (dsp->ds_ctfp != NULL && ctf_update(dsp->ds_ctfp) == CTF_ERR) {
+		xyerror(D_UNKNOWN, "failed to update type definitions: %s\n",
+		    ctf_errmsg(ctf_errno(dsp->ds_ctfp)));
+	}
+
+	dt_decl_free(rsp->ds_decl);
+	free(rsp->ds_ident);
+
+	rsp->ds_decl = dsp->ds_decl;
+	rsp->ds_next = dsp->ds_next;
+	rsp->ds_ident = dsp->ds_ident;
+	rsp->ds_ctfp = dsp->ds_ctfp;
+	rsp->ds_type = dsp->ds_type;
+	rsp->ds_class = dsp->ds_class;
+	rsp->ds_enumval = dsp->ds_enumval;
+
+	free(dsp);
+	return (rsp->ds_decl);
+}