8008340: [sampling] assert(upper->pc_offset() >= pc_offset) failed: sanity

Reviewed-by: kvn, sla

src/cpu/sparc/vm/frame_sparc.cpp

@@ -216,6 +216,11 @@ bool frame::safe_for_sender(JavaThread *thread) {
       }
     }
 
+    // Could just be some random pointer within the codeBlob
+    if (!_cb->code_contains(_pc)) {
+      return false;
+    }
+
     // Entry frame checks
     if (is_entry_frame()) {
       // an entry frame must have a valid fp.

src/cpu/x86/vm/frame_x86.cpp

@@ -91,6 +91,12 @@ bool frame::safe_for_sender(JavaThread *thread) {
         return false;
       }
     }
+
+    // Could just be some random pointer within the codeBlob
+    if (!_cb->code_contains(_pc)) {
+      return false;
+    }
+
     // Entry frame checks
     if (is_entry_frame()) {
       // an entry frame must have a valid fp.