7.3.1 Lexical Scope
-Each of "trace", "stream", "event", "struct" and "variant" have their own
-nestable declaration scope, within which types can be declared using "typedef"
-and "typealias". A root declaration scope also contains all declarations
-located outside of any of the aforementioned declarations. An inner
-declaration scope can refer to type declared within its container
-lexical scope prior to the inner declaration scope. Redefinition of a
-typedef or typealias is not valid, although hiding an upper scope
-typedef or typealias is allowed within a sub-scope.
+Each of "trace", "env", "stream", "event", "struct" and "variant" have
+their own nestable declaration scope, within which types can be declared
+using "typedef" and "typealias". A root declaration scope also contains
+all declarations located outside of any of the aforementioned
+declarations. An inner declaration scope can refer to type declared
+within its container lexical scope prior to the inner declaration scope.
+Redefinition of a typedef or typealias is not valid, although hiding an
+upper scope typedef or typealias is allowed within a sub-scope.
7.3.2 Static and Dynamic Scopes
The dynamic scope prefixes are thus:
+ - Trace Environment: <env. >,
- Trace Packet Header: <trace.packet.header. >,
- Stream Packet Context: <stream.packet.context. >,
- Event Header: <stream.event.header. >,
};
};
+/*
+ * The "env" (environment) scope contains assignment expressions. The
+ * field names and content are implementation-defined.
+ */
+env {
+ pid = value; /* example */
+ proc_name = "name"; /* example */
+ ...
+};
+
stream {
id = stream_id;
/* Type 1 - Few event IDs; Type 2 - Many event IDs. See section 6.1. */
clock
double
enum
+env
event
floating_point
float
ctf-specifier:
event { ctf-assignment-expression-list-opt }
stream { ctf-assignment-expression-list-opt }
+ env { ctf-assignment-expression-list-opt }
trace { ctf-assignment-expression-list-opt }
typealias declaration-specifiers abstract-declarator-list type-assignment-operator declaration-specifiers abstract-declarator-list
typealias declaration-specifiers abstract-declarator-list type-assignment-operator declarator-list