Method fromEntryFrame

src/vmStructs.h:324–330

  public:
    static JavaFrameAnchor* fromEntryFrame(uintptr_t fp) {
        const char* call_wrapper = *(const char**)(fp + _entry_frame_call_wrapper_offset);
        if (!goodPtr(call_wrapper) || (uintptr_t)call_wrapper - fp > MAX_CALL_WRAPPER_DISTANCE) {
            return NULL;
        }
        return (JavaFrameAnchor*)(call_wrapper + _call_wrapper_anchor_offset);
    }

    uintptr_t lastJavaSP() {
        return *(uintptr_t*) at(_anchor_sp_offset);