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| Current File : //usr/src/cddl/contrib/opensolaris/lib/libdtrace/common/dt_decl.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 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);
}