Mark Probst EMAIL: cacao@complang.tuwien.ac.at
Philipp Tomsich EMAIL: cacao@complang.tuwien.ac.at
- Last Change: 1998/10/29
+ Last Change: 1998/10/30
*******************************************************************************/
-/***************** Die Datenstrukturen fuer das Laufzeitsystem ***************/
+/***************** Die Datenstrukturen fuer das Laufzeitsystem ****************/
/********* Objekte **********
-/************** Strukturen f"ur Klassen, Felder & Methoden *****************/
+/******************** class, field and method structures **********************/
- /*** Struktur: fieldinfo ***/
+/********************** structure: fieldinfo **********************************/
-typedef struct fieldinfo { /* Struktur f"ur ein Feld einer Klasse */
- s4 flags; /* die ACC-Flags */
- s4 type; /* Grunddatentyp */
- unicode *name; /* Name des Felds */
- unicode *descriptor; /* Typedescriptor in JavaVM-Form */
+typedef struct fieldinfo {/* field of a class */
+ s4 flags; /* ACC flags */
+ s4 type; /* basic data type */
+ unicode *name; /* name of field */
+ unicode *descriptor; /* JavaVM descriptor string of field */
- s4 offset; /* Offset vom Anfang des Objektes */
- /* (bei Instanzvariablen) */
+ s4 offset; /* offset from start of object (instance variables) */
- union { /* Speicher f"ur den Wert */
- s4 i; /* (bei Klassenvariablen) */
+ union { /* storage for static values (class variables) */
+ s4 i;
s8 l;
float f;
double d;
void *a;
} value;
-
+
} fieldinfo;
-/*** Struktur: exceptiontable ***/
+/********************** structure: exceptiontable *****************************/
-typedef struct exceptiontable { /* Exceptionhandler-Eintrag in einer Methode */
- s4 startpc; /* Anfang des G"ultigkeitsbereichs */
- s4 endpc; /* Ende des Bereichs (exklusive) */
- s4 handlerpc; /* JavaVM-Position des Handlers */
- classinfo *catchtype; /* Typ der behandelten Exceptions (oder
- NULL, wenn alle behandelt werden sollen) */
+typedef struct exceptiontable { /* exceptiontable entry in a method */
+ s4 startpc; /* start pc of guarded area (inclusive) */
+ s4 endpc; /* end pc of guarded area (exklusive) */
+ s4 handlerpc; /* pc of exception handler */
+ classinfo *catchtype; /* catchtype of exception (NULL == catchall) */
} exceptiontable;
+/********************** structure: methodinfo *********************************/
-/*** Struktur: methodinfo ***/
-
-typedef struct methodinfo { /* Struktur f"ur eine Methode einer Klasse */
- s4 flags; /* die ACC-Flags */
- unicode *name; /* Name der Methode */
- unicode *descriptor; /* der JavaVM-Descriptorstring f"ur Methoden */
- s4 returntype; /* only temporary valid, return type */
- s4 paramcount; /* only temporary valid, number of parameters */
- u1 *paramtypes; /* only temporary valid, parameter types */
- classinfo *class; /* Die Klasse, der die Methode geh"ort */
- u4 vftblindex; /* Index dieser Methode f"ur die Virtual
- Function Table (wenn es keine statische
- Methode ist) */
+typedef struct methodinfo { /* method structure */
+ s4 flags; /* ACC flags */
+ unicode *name; /* name of method */
+ unicode *descriptor; /* JavaVM descriptor string of method */
+ s4 returntype; /* only temporary valid, return type */
+ s4 paramcount; /* only temporary valid, parameter count */
+ u1 *paramtypes; /* only temporary valid, parameter types */
+ classinfo *class; /* class, the method belongs to */
+ u4 vftblindex; /* index of method in virtual function table
+ (if it is a virtual method) */
+ s4 maxstack; /* maximum stack depth of method */
+ s4 maxlocals; /* maximum number of local variables */
+ u4 jcodelength; /* length of JavaVM code */
+ u1 *jcode; /* pointer to JavaVM code */
- s4 maxstack; /* maximale Stacktiefe des JavaVM-Codes */
- s4 maxlocals; /* maximale Anzahl der JavaVM-Variablen */
- u4 jcodelength; /* L"ange des JavaVM-Codes */
- u1 *jcode; /* und Zeiger auf den JavaVM-Code */
+ s4 exceptiontablelength;/* exceptiontable length */
+ exceptiontable *exceptiontable; /* the exceptiontable */
- s4 exceptiontablelength; /* L"ange der Exceptintable */
- exceptiontable *exceptiontable; /* Die Exceptiontable selber */
+ u1 *stubroutine; /* stub for compiling or calling natives */
+ u4 mcodelength; /* legth of generated machine code */
+ u1 *mcode; /* pointer to machine code */
+ u1 *entrypoint; /* entry point in machine code */
- u1 *stubroutine; /* STUB-Routine for compiling or calling
- natives */
- u4 mcodelength; /* L"ange des generierten Maschinencodes */
- u1 *mcode; /* Zeiger auf den Maschinencode */
- u1 *entrypoint; /* Entrypoint to the Maschine-Code */
} methodinfo;
-/*** Struktur: classinfo ***/
+/********************** structure: classinfo **********************************/
-struct classinfo { /* Datenstruktur f"ur eine Klasse */
- java_objectheader header; /* Weil auch Klassen als Objekte angesprochen
- werden */
+struct classinfo { /* class structure */
+ java_objectheader header; /* classes are also objects */
- s4 flags; /* Die ACC-Flags */
- unicode *name; /* Name der Klasse */
-
- s4 cpcount; /* Anzahl der Eintr"age im Constant-Pool */
- u1 *cptags; /* Die TAGs f"ur den Constant-Pool */
- voidptr *cpinfos; /* Die Zeiger auf die Info-Strukturen */
-
- classinfo *super; /* Zeiger auf die "ubergeordnete Klasse */
-
- s4 interfacescount; /* Anzahl der Interfaces */
- classinfo **interfaces; /* Zeiger auf die Interfaces */
-
- s4 fieldscount; /* Anzahl der Felder */
- fieldinfo *fields; /* Die Tabelle der Felder */
-
- s4 methodscount; /* Anzahl der Methoden */
- methodinfo *methods; /* Die Tabelle der Methoden */
-
-
- listnode listnode; /* Verkettungsstruktur (f"ur Listen) */
+ s4 flags; /* ACC flags */
+ unicode *name; /* class name */
+
+ s4 cpcount; /* number of entries in constant pool */
+ u1 *cptags; /* constant pool tags */
+ voidptr *cpinfos; /* pointer to constant pool info structures */
+
+ classinfo *super; /* super class pointer */
+ classinfo *sub; /* sub class pointer */
+ classinfo *nextsub; /* pointer to next class in sub class list */
+
+ s4 interfacescount; /* number of interfaces */
+ classinfo **interfaces; /* pointer to interfaces */
- bool initialized; /* true, wenn Klasse bereits Initialisiert */
- bool linked; /* wird von `class_link` auf true gesetzt */
- s4 index; /* Hierarchietiefe (bei normalen Klassen)
- oder fortlaufende Nummer (bei Interfaces)*/
- u4 instancesize; /* Gr"osse eines Objektes dieser Klasse */
+ s4 fieldscount; /* number of fields */
+ fieldinfo *fields; /* field table */
- vftbl *vftbl;
+ s4 methodscount; /* number of methods */
+ methodinfo *methods; /* method table */
- methodinfo* finalizer; /* Finalizer-Methode f"ur die Klasse */
+ listnode listnode; /* linkage */
+
+ bool initialized; /* true, if class already initialised */
+ bool linked; /* true, if class already linked */
+ s4 index; /* hierarchy depth (classes) or index
+ (interfaces) */
+ s4 instancesize; /* size of an instance of this class */
+
+ vftbl *vftbl; /* pointer to virtual function table */
+
+ methodinfo *finalizer; /* finalizer method */
#ifdef JIT_MARKER_SUPPORT
- methodinfo* marker;
+ methodinfo *marker;
#endif
};
struct vftbl {
- classinfo *class; /* Class, the function table belongs to */
+ classinfo *class; /* Class, the function table belongs to */
+
+ s4 vftbllength; /* virtual function table length */
+ s4 interfacetablelength; /* interface table length */
- s4 vftbllength; /* L"aenge der Virtual Function Table */
+ s4 lowclassval; /* low value for relative numbering */
+ s4 highclassval; /* high value for relative numbering */
- s4 interfacetablelength; /* L"ange der Interfacetable */
- u4 *interfacevftbllength; /* -> siehe unten */
+ u4 *interfacevftbllength; /* see description below */
methodptr **interfacevftbl;
methodptr table[1];
-/************************* Referenzen auf die wichtigen Systemklassen ********************/
+/********************** references to some system classes ********************/
extern classinfo *class_java_lang_Object;
extern classinfo *class_java_lang_String;
extern classinfo *class_java_lang_OutOfMemoryError;
extern classinfo *class_java_lang_ArithmeticException;
extern classinfo *class_java_lang_ArrayStoreException;
-extern classinfo *class_java_lang_ThreadDeath; /* schani */
+extern classinfo *class_java_lang_ThreadDeath;
extern classinfo *class_array;
-/********************** Vorgefertigte Instanzen einiger Systemklassen ********************/
+/********************** instances of some system classes **********************/
extern java_objectheader *proto_java_lang_ClassCastException;
extern java_objectheader *proto_java_lang_NullPointerException;
extern java_objectheader *proto_java_lang_OutOfMemoryError;
extern java_objectheader *proto_java_lang_ArithmeticException;
extern java_objectheader *proto_java_lang_ArrayStoreException;
-extern java_objectheader *proto_java_lang_ThreadDeath; /* schani */
+extern java_objectheader *proto_java_lang_ThreadDeath;
-/********************** flag variables *********************/
+/******************************* flag variables *******************************/
extern bool compileall;
extern bool runverbose;
extern bool verbose;
-/********************** trace variables ********************/
+/******************************* trace variables ******************************/
extern int count_class_infos;
extern int count_const_pool_len;
projects / cacao.git / blobdiff