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// NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java
// Hotspot specific tags
JVM_CONSTANT_Invalid = 0, // For bad value initialization
JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course)
JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use
- JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool
- JVM_CONSTANT_StringIndex = 102, // Temporary tag while constructing constant pool
+ JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool, class redefinition
+ JVM_CONSTANT_StringIndex = 102, // Temporary tag while constructing constant pool, class redefinition
JVM_CONSTANT_UnresolvedClassInError = 103, // Error tag due to resolution error
JVM_CONSTANT_MethodHandleInError = 104, // Error tag due to resolution error
JVM_CONSTANT_MethodTypeInError = 105, // Error tag due to resolution error
JVM_CONSTANT_DynamicInError = 106, // Error tag due to resolution error
- JVM_CONSTANT_InternalMax = 106 // Last implementation tag
+ JVM_CONSTANT_InternalMax = 106, // Last implementation tag
+ // internal constant tag flags
+ JVM_CONSTANT_QDescBit = (1 << 7) // Separate bit, encode Q type descriptors
};
-
class constantTag {
private:
jbyte _tag;
public:
- bool is_klass() const { return _tag == JVM_CONSTANT_Class; }
+ bool is_klass() const { return value() == JVM_CONSTANT_Class; }
bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; }
bool is_method() const { return _tag == JVM_CONSTANT_Methodref; }
bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; }
bool is_string() const { return _tag == JVM_CONSTANT_String; }
bool is_int() const { return _tag == JVM_CONSTANT_Integer; }
bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; }
bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; }
bool is_unresolved_klass() const {
- return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;
+ return value() == JVM_CONSTANT_UnresolvedClass || value() == JVM_CONSTANT_UnresolvedClassInError;
}
bool is_unresolved_klass_in_error() const {
- return _tag == JVM_CONSTANT_UnresolvedClassInError;
+ return value() == JVM_CONSTANT_UnresolvedClassInError;
+ }
+
+ bool is_Qdescriptor_klass() const {
+ return (_tag & JVM_CONSTANT_QDescBit) != 0;
}
bool is_method_handle_in_error() const {
return _tag == JVM_CONSTANT_MethodHandleInError;
}
constantTag() {
_tag = JVM_CONSTANT_Invalid;
}
constantTag(jbyte tag) {
- assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||
- (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) ||
- (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");
+ jbyte entry_tag = tag & ~JVM_CONSTANT_QDescBit;
+ assert((((tag & JVM_CONSTANT_QDescBit) == 0) && (entry_tag >= 0 && entry_tag <= JVM_CONSTANT_NameAndType) ||
+ (entry_tag >= JVM_CONSTANT_MethodHandle && entry_tag <= JVM_CONSTANT_InvokeDynamic) ||
+ (entry_tag >= JVM_CONSTANT_InternalMin && entry_tag <= JVM_CONSTANT_InternalMax))
+ || (((tag & JVM_CONSTANT_QDescBit) != 0) && (entry_tag == JVM_CONSTANT_Class ||
+ entry_tag == JVM_CONSTANT_UnresolvedClass || entry_tag == JVM_CONSTANT_UnresolvedClassInError
+ || entry_tag == JVM_CONSTANT_ClassIndex))
+ , "Invalid constant tag");
_tag = tag;
}
static jbyte type2tag(BasicType bt) {
if (is_subword_type(bt)) {
assert(false, "not supported: %s", type2name(bt));
return JVM_CONSTANT_Invalid;
}
}
- jbyte value() const { return _tag; }
+ jbyte value() const { return _tag & ~JVM_CONSTANT_QDescBit; }
+ jbyte tag() const { return _tag; }
jbyte error_value() const;
jbyte non_error_value() const;
BasicType basic_type() const; // if used with ldc, what kind of value gets pushed?
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