Class StandardTags.RootTag
java.lang.Object
com.oracle.truffle.api.instrumentation.Tag
com.oracle.truffle.api.instrumentation.StandardTags.RootTag
- Enclosing class:
StandardTags
Marks program locations as root of a function, method or closure. The root prolog should be
executed by this node. In particular, when the implementation copies
Frame.getArguments()
into frame slots, it should do it here for the instrumentation
to work correctly. As a result, local scope might be incomplete for instruments, as the
prolog does not run before this node is entered and epilog may do destructions before this
node is exited.
Use case descriptions:
- Debugger: Use this tag to unwind frames.
identifier
"ROOT"
. A node tagged
with StandardTags.RootTag
must provide a source section
, if its
root node provides a source section.
If the a node tagged with root
returns a non null
value then it
must be an interop value. There are assertions in place verifying this when Java assertions
are enabled (-ea).
- Since:
- 0.12
-
Nested Class Summary
Nested classes/interfaces inherited from class Tag
Tag.Identifier
-
Method Summary
Methods inherited from class Tag
findProvidedTag, getIdentifier