8326236: assert(ce != nullptr) failed in Continuation::continuation_bottom_sender

Reviewed-by: dholmes, mgronlun

Author: pchilano

src/hotspot/cpu/aarch64/frame_aarch64.cpp

@@ -163,6 +163,11 @@ bool frame::safe_for_sender(JavaThread *thread) {
     }
 
     if (Continuation::is_return_barrier_entry(sender_pc)) {
+      // sender_pc might be invalid so check that the frame
+      // actually belongs to a Continuation.
+      if (!Continuation::is_frame_in_continuation(thread, *this)) {
+        return false;
+      }
       // If our sender_pc is the return barrier, then our "real" sender is the continuation entry
       frame s = Continuation::continuation_bottom_sender(thread, *this, sender_sp);
       sender_sp = s.sp();

src/hotspot/cpu/ppc/frame_ppc.cpp

@@ -122,6 +122,11 @@ bool frame::safe_for_sender(JavaThread *thread) {
     address   sender_pc = (address) sender_abi->lr;
 
     if (Continuation::is_return_barrier_entry(sender_pc)) {
+      // sender_pc might be invalid so check that the frame
+      // actually belongs to a Continuation.
+      if (!Continuation::is_frame_in_continuation(thread, *this)) {
+        return false;
+      }
       // If our sender_pc is the return barrier, then our "real" sender is the continuation entry
       frame s = Continuation::continuation_bottom_sender(thread, *this, sender_sp);
       sender_sp = s.sp();

src/hotspot/cpu/riscv/frame_riscv.cpp

@@ -158,6 +158,11 @@ bool frame::safe_for_sender(JavaThread *thread) {
     }
 
     if (Continuation::is_return_barrier_entry(sender_pc)) {
+      // sender_pc might be invalid so check that the frame
+      // actually belongs to a Continuation.
+      if (!Continuation::is_frame_in_continuation(thread, *this)) {
+        return false;
+      }
       // If our sender_pc is the return barrier, then our "real" sender is the continuation entry
       frame s = Continuation::continuation_bottom_sender(thread, *this, sender_sp);
       sender_sp = s.sp();

src/hotspot/cpu/x86/frame_x86.cpp

@@ -154,6 +154,11 @@ bool frame::safe_for_sender(JavaThread *thread) {
     }
 
     if (Continuation::is_return_barrier_entry(sender_pc)) {
+      // sender_pc might be invalid so check that the frame
+      // actually belongs to a Continuation.
+      if (!Continuation::is_frame_in_continuation(thread, *this)) {
+        return false;
+      }
       // If our sender_pc is the return barrier, then our "real" sender is the continuation entry
       frame s = Continuation::continuation_bottom_sender(thread, *this, sender_sp);
       sender_sp = s.sp();