Constant pool cache

Find receiver for an invoke when arguments are just pushed on stack (i.e., callee stack-frame is not setup)

Current method

Top of expression stack

Expression stack from top down

Returns the address of the requested "slot" on the stack. Slots are as wide as addresses, so are 32 bits wide on a 32-bit machine and 64 bits wide on a 64-bit machine.

tells whether this frame can be deoptimized

Overrides java.lang.Object.clone.

Doc from java.lang.Object.clone.

Creates and returns a copy of this object. The precise meaning of "copy" may depend on the class of the object. The general intent is that, for any object x, the expression:

x.clone() != x

x.clone().getClass() == x.getClass()

x.clone().equals(x)

By convention, the returned object should be obtained by calling super.clone. If a class and all of its superclasses (except Object) obey this convention, it will be the case that x.clone().getClass() == x.getClass().

By convention, the object returned by this method should be independent of this object (which is being cloned). To achieve this independence, it may be necessary to modify one or more fields of the object returned by super.clone before returning it. Typically, this means copying any mutable objects that comprise the internal "deep structure" of the object being cloned and replacing the references to these objects with references to the copies. If a class contains only primitive fields or references to immutable objects, then it is usually the case that no fields in the object returned by super.clone need to be modified.

Tells whether there is another chunk of Delta stack above

Overrides java.lang.Object.equals.

testers -- platform dependent

returns the frame size in stack slots

Fetches the (Java) int at the requested slot

Byte code index. In the underlying frame, what is actually stored is a byte code pointer (BCP), which is converted to a BCI and back by the GC when methods are moved. In this system, interior pointers are not allowed, so we must make the access to the interpreter frame's BCI atomic with respect to GC. This may mean implementation with an underlying call through native code into the VM or a magic sequence in the compiler. (FIXME)

Constant pool cache

FIXME: is this portable?

Current method

Link (i.e., the pointer to the previous frame)

Fetches the OopHandle at the requested slot

pc: Returns the pc at which this frame will continue normally. It must point at the beginning of the next instruction to execute.

Return address

Returns the stack pointer of the calling frame

If this is a signal handler frame (again, on a platform with a notion of signals), get the name of the signal.

If this is a signal handler frame (again, on a platform with a notion of signals), get the signal number.

The frame's original SP, before any extension by an interpreted callee; used for packing debug info into vframeArray objects and vframeArray lookup.

Java frame called from C?

oldest frame? (has no sender) FIXME: this is modified from the C++ code to handle the debugging situation where we try to traverse the stack for, for example, the signal thread, and don't find any valid Java frames. Would really like to put the second half of the conditional in some sort of debugging-only if statement.

same for Java frame

type testers

performs sanity checks on interpreted frames.

This is an addition for debugging purposes on platforms which have the notion of signals.

Conversion from an VMReg::Name to physical stack location

returns the sender, but skips conversion frames

returns the sending frame

equivalent to sender(map, null)

tells whether this frame is marked for deoptimization