7085 add support for "if" and "else" statements in dtrace

@@ -25,10 +25,14 @@
 /*
  * Copyright (c) 2013 by Delphix. All rights reserved.
  * Copyright (c) 2013 Joyent, Inc. All rights reserved.
  */
 
+/*
+ * Copyright (c) 2014 by Delphix. All rights reserved.
+ */
+
 #ifndef _DT_PARSER_H
 #define _DT_PARSER_H
 
 #include <sys/types.h>
 #include <sys/dtrace.h>

@@ -103,10 +107,16 @@
                         char *_name;            /* string name of provider */
                         struct dt_provider *_pvp; /* provider references */
                         struct dt_node *_probes;  /* list of probe nodes */
                         int _redecl;            /* provider redeclared */
                 } _provider;
+
+                struct {
+                        struct dt_node *_conditional;
+                        struct dt_node *_body;
+                        struct dt_node *_alternate_body;
+                } _conditional;
         } dn_u;
 
         struct dt_node *dn_list; /* parse tree list link */
         struct dt_node *dn_link; /* allocation list link */
 } dt_node_t;

@@ -138,10 +148,15 @@
 #define dn_provname     dn_u._provider._name    /* DT_NODE_PROVIDER */
 #define dn_provider     dn_u._provider._pvp     /* DT_NODE_PROVIDER */
 #define dn_provred      dn_u._provider._redecl  /* DT_NODE_PROVIDER */
 #define dn_probes       dn_u._provider._probes  /* DT_NODE_PROVIDER */
 
+/* DT_NODE_IF: */
+#define dn_conditional          dn_u._conditional._conditional
+#define dn_body                 dn_u._conditional._body
+#define dn_alternate_body       dn_u._conditional._alternate_body
+
 #define DT_NODE_FREE    0       /* unused node (waiting to be freed) */
 #define DT_NODE_INT     1       /* integer value */
 #define DT_NODE_STRING  2       /* string value */
 #define DT_NODE_IDENT   3       /* identifier */
 #define DT_NODE_VAR     4       /* variable reference */

@@ -160,10 +175,11 @@
 #define DT_NODE_MEMBER  17      /* member definition */
 #define DT_NODE_XLATOR  18      /* translator definition */
 #define DT_NODE_PROBE   19      /* probe definition */
 #define DT_NODE_PROVIDER 20     /* provider definition */
 #define DT_NODE_PROG    21      /* program translation unit */
+#define DT_NODE_IF      22      /* if statement */
 
 #define DT_NF_SIGNED    0x01    /* data is a signed quantity (else unsigned) */
 #define DT_NF_COOKED    0x02    /* data is a known type (else still cooking) */
 #define DT_NF_REF       0x04    /* pass by reference (array, struct, union) */
 #define DT_NF_LVALUE    0x08    /* node is an l-value according to ANSI-C */

@@ -211,10 +227,11 @@
 extern dt_node_t *dt_node_member(dt_decl_t *, char *, dt_node_t *);
 extern dt_node_t *dt_node_xlator(dt_decl_t *, dt_decl_t *, char *, dt_node_t *);
 extern dt_node_t *dt_node_probe(char *, int, dt_node_t *, dt_node_t *);
 extern dt_node_t *dt_node_provider(char *, dt_node_t *);
 extern dt_node_t *dt_node_program(dt_node_t *);
+extern dt_node_t *dt_node_if(dt_node_t *, dt_node_t *, dt_node_t *);
 
 extern dt_node_t *dt_node_link(dt_node_t *, dt_node_t *);
 extern dt_node_t *dt_node_cook(dt_node_t *, uint_t);
 
 extern dt_node_t *dt_node_xalloc(dtrace_hdl_t *, int);

@@ -235,10 +252,11 @@
 extern void dt_node_promote(dt_node_t *, dt_node_t *, dt_node_t *);
 
 extern void dt_node_diftype(dtrace_hdl_t *,
     const dt_node_t *, dtrace_diftype_t *);
 extern void dt_node_printr(dt_node_t *, FILE *, int);
+extern void dt_printd(dt_node_t *, FILE *, int);
 extern const char *dt_node_name(const dt_node_t *, char *, size_t);
 extern int dt_node_root(dt_node_t *);
 
 struct dtrace_typeinfo; /* see <dtrace.h> */
 struct dt_pcb;          /* see <dt_impl.h> */