src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp

rev 3149 : 7147740: add assertions to check stack alignment on VM entry from generated code (x64)
Summary: check stack alignment on VM entry on x64.
Reviewed-by:

*** 249,258 ****
--- 249,267 ----
  
  frame os::get_sender_for_C_frame(frame* fr) {
    return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
  }
  
+ // Returns an estimate of the current stack pointer. Result must be guaranteed to
+ // point into the calling threads stack, and be no lower than the current stack
+ // pointer.
+ address os::current_stack_pointer() {
+   volatile int dummy;
+   address sp = (address)&dummy + 8;     // %%%% need to confirm if this is right
+   return sp;
+ }
+ 
  frame os::current_frame() {
    intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
    frame myframe(sp, frame::unpatchable,
                  CAST_FROM_FN_PTR(address, os::current_frame));
    if (os::is_first_C_frame(&myframe)) {
*** 813,817 ****
--- 822,831 ----
   // For compiler1 the architecture is v8 and frps isn't present in v8
   extern "C"  void _mark_fpu_nosave() {
     __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
    }
  #endif //defined(__sparc) && defined(COMPILER2)
+ 
+ #ifndef PRODUCT
+ void os::verify_stack_alignment() {
+ }
+ #endif