-XX flags (value origin)

Utility routine for getting data structure alignment correct

Utility routine for getting data structure alignment correct

Utility routine for building an int from two "unsigned" 16-bit shorts

This is only used by the debugging system. Informs all registered resumption observers that the VM has been resumed. The application is responsible for actually having performed the resumption. No OopHandles must be used after this point, as they may move in the target address space due to garbage collection.

This is only used by the debugging system. Informs all registered suspension observers that the VM has been suspended. The application is responsible for actually having performed the suspension. Garbage collection must be forbidden at this point; for example, a JPDA-level suspension is not adequate since the VM thread may still be running.

Get bytes-per-long == long/double natural alignment.

Returns the code cache; should not be used if is core build

Returns the CPU this VM is running on. Notice that by delegating to the debugger we can transparently support remote debugging.

This is only used by the debugging (i.e., non-runtime) system

FIXME: figure out where to stick this

Get minimum object alignment in bytes.

Returns the OS this VM is running on. Notice that by delegating to the debugger we can transparently support remote debugging.

Should only be called for C1 builds

Indicates whether Thread-Local Allocation Buffers are used

This is the primary accessor used by both the debugger and any potential runtime system

This could be used by a reflective runtime system

This is used by the debugging system

Returns true if this is a isBigEndian, false otherwise

Returns true if this is a C1 build, false otherwise

Returns true if this is a "core" build, false if either C1 or C2 is present

Test to see whether we're in debugging mode (NOTE: this really should not be tested by this code; currently only used in StackFrameStream)

Indicates whether a given program counter is in Java code. This includes but is not spanned by the interpreter and code cache. Only used in the debugging system, for implementing JavaThread.currentFrameGuess() on x86.

Returns true if JVMTI is supported, false otherwise

Indicates whether the underlying machine supports the LP64 data model. This is needed for conditionalizing code in a few places

Returns true if this is a C2 build, false otherwise

This is used by both the debugger and any runtime system. It is the basic mechanism by which classes which mimic underlying VM functionality cause themselves to be initialized. The given observer will be notified (with arguments (null, null)) when the VM is re-initialized, as well as when it registers itself with the VM.

This is only used by the debugging system. The given observer will be notified if the underlying VM resumes execution. NOTE that the given observer is not triggered if the VM is currently running and therefore differs in behavior from registerVMInitializedObserver (because of the possibility of race conditions if the observer is added while the VM is being suspended or resumed).

This is only used by the debugging system. The given observer will be notified if the underlying VM suspends execution. NOTE that the given observer is not triggered if the VM is currently suspended and therefore differs in behavior from registerVMInitializedObserver (because of the possibility of race conditions if the observer is added while the VM is being suspended or resumed).

This is used by the debugging system

Returns true if C2 derived pointer table should be used, false otherwise