Adaptations for 17u.

Author: TheRealMDoerr

src/hotspot/cpu/ppc/frame_ppc.cpp

@@ -129,19 +129,21 @@ bool frame::safe_for_sender(JavaThread *thread) {
       return false;
     }
 
-    intptr_t* unextended_sender_sp = is_interpreted_frame() ? interpreter_frame_sender_sp() : sender_sp;
+    intptr_t* unextended_sender_sp = is_interpreted_frame() ? (intptr_t*)get_ijava_state()->sender_sp : sender_sp;
 
+    // It should be safe to construct the sender though it might not be valid.
+
+    // JDK-8339386 is different than the upstream version:
+    // The frame constructor doesn't check sanity of a deopt pc, but determines it.
+    // Other accessors for reading it are not available in 17u.
+    frame sender(sender_sp, sender_pc, unextended_sender_sp);
     // If the sender is a deoptimized nmethod we need to check if the original pc is valid.
     nmethod* sender_nm = sender_blob->as_nmethod_or_null();
-    if (sender_nm != nullptr && sender_nm->is_deopt_pc(sender_pc)) {
-      address orig_pc = *(address*)((address)unextended_sender_sp + sender_nm->orig_pc_offset());
+    if (sender_nm != nullptr && sender._deopt_state == is_deoptimized) {
+      address orig_pc = sender.pc();
       if (!sender_nm->insts_contains_inclusive(orig_pc)) return false;
     }
 
-    // It should be safe to construct the sender though it might not be valid.
-
-    frame sender(sender_sp, sender_pc, unextended_sender_sp, nullptr /* fp */, sender_blob);
-
     // Do we have a valid fp?
     address sender_fp = (address) sender.fp();