/* * @(#)oobj.h 1.78 98/01/12 * * Copyright (c) 1995, 1996 Sun Microsystems, Inc. All Rights Reserved. * * This software is the confidential and proprietary information of Sun * Microsystems, Inc. ("Confidential Information"). You shall not * disclose such Confidential Information and shall use it only in * accordance with the terms of the license agreement you entered into * with Sun. * * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING * THIS SOFTWARE OR ITS DERIVATIVES. * * CopyrightVersion 1.1_beta * */ /* * Java object header format */ #ifndef _OOBJ_H_ #define _OOBJ_H_ #ifndef JAVA_CLASSFILE_MAGIC #include #include "typedefs.h" #include "debug.h" #include "bool.h" #include "oobj_md.h" #include "signature.h" #define JAVA_CLASSFILE_MAGIC 0xCafeBabe #define JAVASRCEXT "java" #define JAVASRCEXTLEN 4 #define JAVAOBJEXT "class" #define JAVAOBJEXTLEN 5 #define JAVA_VERSION 45 #define JAVA_MINOR_VERSION 3 #define ARRAYHEADER long alloclen #define HandleTo(T) typedef struct H##T { Class##T *obj; struct methodtable *methods;} H##T typedef long OBJECT; typedef OBJECT Classjava_lang_Object; typedef OBJECT ClassObject; HandleTo(java_lang_Object); typedef Hjava_lang_Object JHandle; typedef Hjava_lang_Object HObject; typedef unsigned short unicode; extern unicode *str2unicode(char *, unicode *, long); extern char *int642CString(int64_t number, char *buf, int buflen); #define ALIGN(n) (((n)+3)&~((ptr_int)3)) #define UCALIGN(n) ((unsigned char *)ALIGN((ptr_int)(n))) struct Hjava_lang_Class; /* forward reference for some compilers */ struct Classjava_lang_Class; /* forward reference for some compilers */ typedef struct Classjava_lang_Class Classjava_lang_Class; HandleTo(java_lang_Class); typedef struct Hjava_lang_Class ClassClass; struct fieldblock { ClassClass *clazz; char *signature; char *name; unsigned long ID; unsigned short access; union { unsigned long offset; /* info of data */ OBJECT static_value; void *static_address; } u; }; #define fieldname(fb) ((fb)->name) #define fieldsig(fb) ((fb)->signature) #define fieldIsArray(fb) (fieldsig(fb)[0] == SIGNATURE_ARRAY) #define fieldIsClass(fb) (fieldsig(fb)[0] == SIGNATURE_CLASS) #define fieldclass(fb) ((fb)->clazz) struct execenv; struct methodblock { struct fieldblock fb; unsigned char *code; /* the code */ struct CatchFrame *exception_table; struct lineno *line_number_table; struct localvar *localvar_table; unsigned long code_length; unsigned long exception_table_length; unsigned long line_number_table_length; unsigned long localvar_table_length; bool_t (*invoker) (JHandle *o, struct methodblock *mb, int args_size, struct execenv *ee); unsigned short args_size; /* total size of all arguments */ unsigned short maxstack; /* maximum stack usage */ unsigned short nlocals; /* maximum number of locals */ /* 2 spare bytes here */ void *CompiledCode; /* it's type is machine dependent */ void *CompiledCodeInfo; /* it's type is machine dependent */ long CompiledCodeFlags; /* machine dependent bits */ unsigned long inlining; /* possible inlining of code */ unsigned short nexceptions; /* number of checked exceptions */ unsigned short *exceptions; /* constant pool indices */ #ifdef JCOV struct covtable *coverage_table; unsigned long coverage_table_length; #endif }; struct HIOstream; struct methodtable { ClassClass *classdescriptor; struct methodblock *methods[1]; }; struct imethodtable { int icount; /* number of interfaces to follow */ struct { ClassClass *classdescriptor; unsigned long *offsets; /* info of data */ } itable[1]; }; typedef struct { char body[1]; } ArrayOfByte; typedef ArrayOfByte ClassArrayOfByte; HandleTo(ArrayOfByte); typedef struct { unicode body[1]; } ArrayOfChar; typedef ArrayOfChar ClassArrayOfChar; HandleTo(ArrayOfChar); typedef struct { signed short body[1]; } ArrayOfShort; typedef ArrayOfShort ClassArrayOfShort; HandleTo(ArrayOfShort); typedef struct { int32_t body[1]; } ArrayOfInt; typedef ArrayOfInt ClassArrayOfInt; HandleTo(ArrayOfInt); typedef struct { int64_t body[1]; } ArrayOfLong; typedef ArrayOfLong ClassArrayOfLong; HandleTo(ArrayOfLong); typedef struct { float body[1]; } ArrayOfFloat; typedef ArrayOfFloat ClassArrayOfFloat; HandleTo(ArrayOfFloat); typedef struct { double body[1]; } ArrayOfDouble; typedef ArrayOfDouble ClassArrayOfDouble; HandleTo(ArrayOfDouble); typedef struct { JHandle *(body[1]); } ArrayOfArray; typedef ArrayOfArray ClassArrayOfArray; HandleTo(ArrayOfArray); typedef struct { HObject *(body[1]); } ArrayOfObject; typedef ArrayOfObject ClassArrayOfObject; HandleTo(ArrayOfObject); typedef struct Hjava_lang_String HString; typedef struct { HString *(body[1]); } ArrayOfString; typedef ArrayOfString ClassArrayOfString; HandleTo(ArrayOfString); /* Note: any handles in this structure must also have explicit code in the ScanClasses() routine of the garbage collector to mark the handle. */ struct Classjava_lang_Class { /* Things following here are saved in the .class file */ unsigned short major_version; unsigned short minor_version; char *name; char *super_name; char *source_name; ClassClass *superclass; ClassClass *HandleToSelf; struct Hjava_lang_ClassLoader *loader; struct methodblock *finalizer; union cp_item_type *constantpool; struct methodblock *methods; struct fieldblock *fields; short *implements; struct methodtable *methodtable; struct methodtable *methodtable_mem; struct fieldblock **slottable; HString *classname; union { struct { unsigned long thishash; /* unused */ unsigned long totalhash; /* unused */ } cbhash; struct { unsigned char typecode; /* VM typecode */ char typesig; /* signature constant */ unsigned char slotsize; /* (bytes) in slot */ unsigned char elementsize; /* (bytes) in array */ unsigned long xxspare; } cbtypeinfo; } hashinfo; unsigned short constantpool_count; /* number of items in pool */ unsigned short methods_count; /* number of methods */ unsigned short fields_count; /* number of fields */ unsigned short implements_count; /* number of protocols */ unsigned short methodtable_size; /* the size of method table */ unsigned short slottbl_size; /* size of slottable */ unsigned short instance_size; /* (bytes) of an instance */ unsigned short access; /* how this class can be accesses */ unsigned short flags; /* see the CCF_* macros */ struct HArrayOfObject *signers; struct imethodtable *imethodtable; void *init_thread; /* EE of initializing thread */ ClassClass *last_subclass_of; #ifdef JCOV char *absolute_source_name; int64_t timestamp; #endif }; extern void FreeClass(ClassClass *cb); extern void MakeClassSticky(ClassClass *cb); #define cbAccess(cb) ((unhand(cb))->access) #define cbClassname(cb) ((unhand(cb))->classname) #define cbConstantPool(cb) ((unhand(cb))->constantpool) #define cbConstantPoolCount(cb) ((unhand(cb))->constantpool_count) #define cbFields(cb) ((unhand(cb))->fields) #define cbFieldsCount(cb) ((unhand(cb))->fields_count) #define cbFinalizer(cb) ((unhand(cb))->finalizer) #define cbFlags(cb) ((unhand(cb))->flags) #define cbHandle(cb) (cb) #define cbImplements(cb) ((unhand(cb))->implements) #define cbImplementsCount(cb) ((unhand(cb))->implements_count) #define cbInstanceSize(cb) ((unhand(cb))->instance_size) #define cbIntfMethodTable(cb) ((unhand(cb))->imethodtable) #define cbLastSubclassOf(cb) ((unhand(cb))->last_subclass_of) #define cbLoader(cb) ((unhand(cb))->loader) #define cbMajorVersion(cb) ((unhand(cb))->major_version) #define cbMethods(cb) ((unhand(cb))->methods) #define cbMethodsCount(cb) ((unhand(cb))->methods_count) #define cbMethodTable(cb) ((unhand(cb))->methodtable) #define cbMethodTableMem(cb) ((unhand(cb))->methodtable_mem) #define cbMethodTableSize(cb) ((unhand(cb))->methodtable_size) #define cbMinorVersion(cb) ((unhand(cb))->minor_version) #define cbName(cb) ((unhand(cb))->name) #define cbSigners(cb) ((unhand(cb))->signers) #define cbSlotTable(cb) ((unhand(cb))->slottable) #define cbSlotTableSize(cb) ((unhand(cb))->slottbl_size) #define cbSourceName(cb) ((unhand(cb))->source_name) #define cbSuperclass(cb) ((unhand(cb))->superclass) #define cbSuperName(cb) ((unhand(cb))->super_name) #define cbThisHash(cb) ((unhand(cb))->hashinfo.cbhash.thishash) #define cbTotalHash(cb) ((unhand(cb))->hashinfo.cbhash.totalhash) #define cbInitThread(cb) ((unhand(cb))->init_thread) #ifdef JCOV #define cbAbsoluteSourceName(cb) ((unhand(cb))->absolute_source_name) #define cbTimestamp(cb) ((unhand(cb))->timestamp) #endif #define cbIsInterface(cb) ((cbAccess(cb) & ACC_INTERFACE) != 0) /* These are currently only valid for primitive types */ #define cbIsPrimitive(cb) (CCIs(cb, Primitive)) #define cbTypeCode(cb) ((unhand(cb))->hashinfo.cbtypeinfo.typecode) #define cbTypeSig(cb) ((unhand(cb))->hashinfo.cbtypeinfo.typesig) #define cbSlotSize(cb) ((unhand(cb))->hashinfo.cbtypeinfo.slotsize) #define cbElementSize(cb) ((unhand(cb))->hashinfo.cbtypeinfo.elementsize) extern char *classname2string(char *str, char *dst, int size); #define twoword_static_address(fb) ((fb)->u.static_address) #define normal_static_address(fb) (&(fb)->u.static_value) /* ClassClass flags */ #define CCF_IsSysLock 0x01 /* any instance treated as a "system" lock */ #define CCF_IsResolved 0x02 /* has been run? */ #define CCF_IsError 0x04 /* Resolution caused an error */ #define CCF_IsSoftRef 0x08 /* whether this is class Ref or subclass */ #define CCF_IsInitialized 0x10 /* whether this is class has been inited */ #define CCF_IsLinked 0x20 /* Has symbolic entries been linked */ #define CCF_IsVerified 0x40 /* has the verifier been run */ #define CCF_IsPrimitive 0x100 /* if pseudo-class for a primitive type */ #define CCF_IsReferenced 0x200 /* Class is in use */ #define CCF_IsSticky 0x400 /* Don't unload this class */ #define CCIs(cb,flag) (((unhand(cb))->flags & CCF_Is##flag) != 0) #define CCSet(cb,flag) ((unhand(cb))->flags |= CCF_Is##flag) #define CCClear(cb,flag) ((unhand(cb))->flags &= ~CCF_Is##flag) /* map from pc to line number */ struct lineno { unsigned long pc, line_number; }; extern struct lineno *lntbl; extern long lntsize, lntused; #ifdef JCOV struct covtable { unsigned long pc, type, where, count; }; #endif /* Symbol table entry for local variables and parameters. pc0/length defines the range that the variable is valid, slot is the position in the local variable array in ExecEnv. nameoff and sigoff are offsets into the string table for the variable name and type signature. A variable is defined with DefineVariable, and at that time, the node for that name is stored in the localvar entry. When code generate is completed for a particular scope, a second pass it made to replace the src node entry with the correct length. */ struct localvar { long pc0; /* starting pc for this variable */ long length; /* -1 initially, end pc - pc when we're done */ short nameoff; /* offset into string table */ short sigoff; /* offset into string table */ long slot; /* local variable slot */ }; /* Try/catch is implemented as follows. On a per class basis, there is a catch frame handler (below) for each catch frame that appears in the source. It contains the pc range of the corresponding try body, a pc to jump to in the event that that handler is chosen, and a catchType which must match the object being thrown if that catch handler is to be taken. The list of catch frames are sorted by pc. If one range is inside another, then outer most range (the one that encompasses the other) appears last in the list. Therefore, it is possible to search forward, and the first one that matches is the innermost one. Methods with catch handlers will layout the code without the catch frames. After all the code is generated, the catch clauses are generated and table entries are created. When the class is complete, the table entries are dumped along with the rest of the class. */ struct CatchFrame { long start_pc, end_pc; /* pc range of corresponding try block */ long handler_pc; /* pc of catch handler */ void* compiled_CatchFrame; /* space to be used by machine code */ short catchType; /* type of catch parameter */ }; #define MC_SUPER (1<<5) #define MC_NARGSMASK (MC_SUPER-1) #define MC_INT (0<<6) #define MC_FLOAT (1<<6) #define MC_VOID (2<<6) #define MC_OTHER (3<<6) #define MC_TYPEMASK (3<<6) enum { CONSTANT_Utf8 = 1, CONSTANT_Unicode, /* unused */ CONSTANT_Integer, CONSTANT_Float, CONSTANT_Long, CONSTANT_Double, CONSTANT_Class, CONSTANT_String, CONSTANT_Fieldref, CONSTANT_Methodref, CONSTANT_InterfaceMethodref, CONSTANT_NameAndType }; union cp_item_type { int i; float f; char *cp; unsigned char *type; /* for type table */ ClassClass *clazz; struct methodblock *mb; struct fieldblock *fb; struct Hjava_lang_String *str; void *p; /* for very rare occassions */ }; typedef union cp_item_type cp_item_type; #define CONSTANT_POOL_ENTRY_RESOLVED 0x80 #define CONSTANT_POOL_ENTRY_TYPEMASK 0x7F #define CONSTANT_POOL_TYPE_TABLE_GET(cp,i) (((unsigned char *)(cp))[i]) #define CONSTANT_POOL_TYPE_TABLE_PUT(cp,i,v) (CONSTANT_POOL_TYPE_TABLE_GET(cp,i) = (v)) #define CONSTANT_POOL_TYPE_TABLE_SET_RESOLVED(cp,i) \ (CONSTANT_POOL_TYPE_TABLE_GET(cp,i) |= CONSTANT_POOL_ENTRY_RESOLVED) #define CONSTANT_POOL_TYPE_TABLE_IS_RESOLVED(cp,i) \ ((CONSTANT_POOL_TYPE_TABLE_GET(cp,i) & CONSTANT_POOL_ENTRY_RESOLVED) != 0) #define CONSTANT_POOL_TYPE_TABLE_GET_TYPE(cp,i) \ (CONSTANT_POOL_TYPE_TABLE_GET(cp,i) & CONSTANT_POOL_ENTRY_TYPEMASK) #define CONSTANT_POOL_TYPE_TABLE_INDEX 0 #define CONSTANT_POOL_UNUSED_INDEX 1 /* The following are used by the constant pool of "array" classes. */ #define CONSTANT_POOL_ARRAY_DEPTH_INDEX 1 #define CONSTANT_POOL_ARRAY_TYPE_INDEX 2 #define CONSTANT_POOL_ARRAY_CLASS_INDEX 3 #define CONSTANT_POOL_ARRAY_LENGTH 4 /* * Package shorthand: this isn't obviously the correct place. */ #define JAVAPKG "java/lang/" #define JAVAIOPKG "java/io/" #define JAVANETPKG "java/net/" #endif #endif /* !_OOBJ_H_ */