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test/hotspot/jtreg/vmTestbase/nsk/jvmti/IterateThroughHeap/filter-tagged/HeapFilter.cpp

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@@ -59,14 +59,15 @@
 static int reported_objects = 0;
 
 //expected values
 #define INT_ARRAY_LENGTH 2
 
-static jint TAGGED_STATIC_INT_VALUE = 0xC0DE01;
-static jint TAGGED_INT_VALUE = 0xC0DE02;
-static jint UNTAGGED_STATIC_INT_VALUE = 0xC0DE03;
-static jint UNTAGGED_INT_VALUE = 0xC0DE04;
+static jint POISON = 0x1234;
+static jint TAGGED_STATIC_INT_VALUE = 0xC0DE01 + POISON;
+static jint TAGGED_INT_VALUE = 0xC0DE02 + POISON;
+static jint UNTAGGED_STATIC_INT_VALUE = 0xC0DE03 + POISON;
+static jint UNTAGGED_INT_VALUE = 0xC0DE04 + POISON;
 static jint TAGGED_INT_ARRAY_VALUE[] = {0xC0DE01,
                                                  0xC0DE01+1};
 static jint UNTAGGED_INT_ARRAY_VALUE[] = {0xC0DE03,
                                                    0xC0DE03+1};
 static const wchar_t *TAGGED_STRING_VALUE = L"I'm a tagged string";

@@ -350,10 +351,18 @@
       }
       is_static = (modifiers & STATIC_FIELD) == STATIC_FIELD;
       if (is_primitive_type(objects_info[object].fields[field].signature)) {
         objects_info[object].fields[field].primitive = 1;
         is_primitive = 1;
+        // Add POISON to all int fields to make the value opaque to the JIT compiler.
+        if (is_static) {
+          jint value = jni->GetStaticIntField(targetClass, targetFields[field]);
+          jni->SetStaticIntField(targetClass, targetFields[field], value + POISON);
+        } else {
+          jint value = jni->GetIntField(target, targetFields[field]);
+          jni->SetIntField(target, targetFields[field], value + POISON);
+        }
       } else {
         jobject value;
         if (!NSK_JVMTI_VERIFY(jvmti->GetFieldModifiers(
                 targetClass, targetFields[field], &modifiers))) {
           return JNI_ERR;
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