-/* -*- mode: c; tab-width: 4; c-basic-offset: 4 -*- */
-/****************************** loader.c ***************************************
- Copyright (c) 1997 A. Krall, R. Grafl, M. Gschwind, M. Probst
+/* loader.c ********************************************************************
+
+ Copyright (c) 1999 A. Krall, R. Grafl, R. Obermaiser, M. Probst
See file COPYRIGHT for information on usage and disclaimer of warranties
Contains the functions of the class loader.
Author: Reinhard Grafl EMAIL: cacao@complang.tuwien.ac.at
- Changes: Mark Probst EMAIL: cacao@complang.tuwien.ac.at
+ Changes: Andreas Krall EMAIL: cacao@complang.tuwien.ac.at
+ Roman Obermaiser EMAIL: cacao@complang.tuwien.ac.at
+ Mark Probst EMAIL: cacao@complang.tuwien.ac.at
- Last Change: 1997/06/03
+ Last Change: 1999/11/08
*******************************************************************************/
#include "global.h"
#include "loader.h"
-
-#include "tables.h"
#include "native.h"
+#include "tables.h"
#include "builtin.h"
+#include "jit.h"
+#ifdef OLD_COMPILER
#include "compiler.h"
+#endif
#include "asmpart.h"
-#include "threads/thread.h" /* schani */
-
+#include "threads/thread.h"
+#include <sys/stat.h>
-/*************************** globale Variablen *******************************/
+/* global variables ***********************************************************/
-extern bool newcompiler;
+extern bool newcompiler; /* true if new compiler is used */
-int count_class_infos = 0;
+int count_class_infos = 0; /* variables for measurements */
int count_const_pool_len = 0;
int count_vftbl_len = 0;
int count_all_methods = 0;
int count_vmcode_len = 0;
int count_extable_len = 0;
+int count_class_loads = 0;
+int count_class_inits = 0;
-bool loadverbose = false; /* Switches f"ur mehr Debug-Meldungen */
+bool loadverbose = false; /* switches for debug messages */
bool linkverbose = false;
bool initverbose = false;
bool makeinitializations = true;
-bool getloadingtime = false;
+bool getloadingtime = false; /* to measure the runtime */
long int loadingtime = 0;
+static s4 interfaceindex; /* sequential numbering of interfaces */
+
+list unloadedclasses; /* list of all referenced but not loaded classes */
+list unlinkedclasses; /* list of all loaded but not linked classes */
+list linkedclasses; /* list of all completely linked classes */
-static u4 interfaceindex; /* fortlaufende Nummer f"ur Interfaces */
-static list unloadedclasses; /* Liste alle referenzierten, aber noch nicht
- geladenen Klassen */
-static list unlinkedclasses; /* Liste aller geladenen, aber noch nicht
- gelinkten Klassen */
- list linkedclasses; /* Liste aller fertig gelinkten Klassen */
+/* utf-symbols for pointer comparison of frequently used strings */
+static utf *utf_innerclasses; /* InnerClasses */
+static utf *utf_constantvalue; /* ConstantValue */
+static utf *utf_code; /* Code */
+static utf *utf_finalize; /* finalize */
+static utf *utf_fidesc; /* ()V */
+static utf *utf_clinit; /* <clinit> */
+static utf *utf_initsystemclass; /* initializeSystemClass */
+static utf *utf_systemclass; /* java/lang/System */
-/***************** die Referenzen auf die wichtigen Systemklassen ************/
+/* important system classes ***************************************************/
classinfo *class_java_lang_Object;
classinfo *class_java_lang_String;
classinfo *class_java_lang_OutOfMemoryError;
classinfo *class_java_lang_ArithmeticException;
classinfo *class_java_lang_ArrayStoreException;
-classinfo *class_java_lang_ThreadDeath; /* schani */
+classinfo *class_java_lang_ThreadDeath;
+classinfo *class_array = NULL;
-classinfo *class_array;
+/******************************************************************************
+
+ structure for primitive classes: contains the class for wrapping the
+ primitive type, the primitive class, the name of the class for wrapping,
+ the one character type signature and the name of the primitive class
+
+ ******************************************************************************/
+
+primitivetypeinfo primitivetype_table[PRIMITIVETYPE_COUNT] = {
+ { NULL, NULL, "java/lang/Double", 'D', "double" },
+ { NULL, NULL, "java/lang/Float", 'F', "float" },
+ { NULL, NULL, "java/lang/Character", 'C', "char" },
+ { NULL, NULL, "java/lang/Integer", 'I', "int" },
+ { NULL, NULL, "java/lang/Long", 'J', "long" },
+ { NULL, NULL, "java/lang/Byte", 'B', "byte" },
+ { NULL, NULL, "java/lang/Short", 'S', "short" },
+ { NULL, NULL, "java/lang/Boolean", 'Z', "boolean" },
+ { NULL, NULL, "java/lang/Void", 'V', "void" }};
-/************ einige vorgefertigte Instanzen wichtiger Systemklassen *********/
+
+/* instances of important system classes **************************************/
java_objectheader *proto_java_lang_ClassCastException;
java_objectheader *proto_java_lang_NullPointerException;
java_objectheader *proto_java_lang_OutOfMemoryError;
java_objectheader *proto_java_lang_ArithmeticException;
java_objectheader *proto_java_lang_ArrayStoreException;
-java_objectheader *proto_java_lang_ThreadDeath; /* schani */
+java_objectheader *proto_java_lang_ThreadDeath;
+
+
+/************* functions for reading classdata *********************************
+
+ getting classdata in blocks of variable size
+ (8,16,32,64-bit integer or float)
+
+*******************************************************************************/
+
+static char *classpath = ""; /* searchpath for classfiles */
+static u1 *classbuffer = NULL; /* pointer to buffer with classfile-data */
+static u1 *classbuf_pos; /* current position in classfile buffer */
+static int classbuffer_size; /* size of classfile-data */
+
+/* transfer block of classfile data into a buffer */
+
+#define suck_nbytes(buffer,len) memcpy(buffer,classbuf_pos+1,len); \
+ classbuf_pos+=len;
+
+/* skip block of classfile data */
+
+#define skip_nbytes(len) classbuf_pos+=len;
+
+#define suck_u1() (*++classbuf_pos)
+#define suck_s8() (s8) suck_u8()
+#define suck_s2() (s2) suck_u2()
+#define suck_s4() (s4) suck_u4()
+#define suck_s1() (s1) suck_u1()
+#define suck_u2() (u2) ((suck_u1()<<8)+suck_u1())
+#define suck_u4() (u4) ((((u4)suck_u1())<<24)+(((u4)suck_u1())<<16)+(((u4)suck_u1())<<8)+((u4)suck_u1()))
+
+
+/* get u8 from classfile data */
+
+static u8 suck_u8 ()
+{
+#if U8_AVAILABLE
+ u8 lo,hi;
+ hi = suck_u4();
+ lo = suck_u4();
+ return (hi<<32) + lo;
+#else
+ u8 v;
+ v.high = suck_u4();
+ v.low = suck_u4();
+ return v;
+#endif
+}
+
+/* get float from classfile data */
+
+static float suck_float ()
+{
+ float f;
+
+#if !WORDS_BIGENDIAN
+ u1 buffer[4];
+ u2 i;
+ for (i=0; i<4; i++) buffer[3-i] = suck_u1 ();
+ memcpy ( (u1*) (&f), buffer, 4);
+#else
+ suck_nbytes ( (u1*) (&f), 4 );
+#endif
+
+ PANICIF (sizeof(float) != 4, "Incompatible float-format");
+
+ return f;
+}
+
+/* get double from classfile data */
+static double suck_double ()
+{
+ double d;
+
+#if !WORDS_BIGENDIAN
+ u1 buffer[8];
+ u2 i;
+ for (i=0; i<8; i++) buffer[7-i] = suck_u1 ();
+ memcpy ( (u1*) (&d), buffer, 8);
+#else
+ suck_nbytes ( (u1*) (&d), 8 );
+#endif
+
+ PANICIF (sizeof(double) != 8, "Incompatible double-format" );
+
+ return d;
+}
+
+/************************** function suck_init *********************************
+
+ called once at startup, sets the searchpath for the classfiles
+
+*******************************************************************************/
+
+void suck_init (char *cpath)
+{
+ classpath = cpath;
+ classbuffer = NULL;
+}
+/************************** function suck_start ********************************
+ returns true if classbuffer is already loaded or a file for the
+ specified class has succussfully been read in. All directories of
+ the searchpath are used to find the classfile (<classname>.class).
+ Returns false if no classfile is found and writes an error message.
+
+*******************************************************************************/
+
+
+bool suck_start (utf *classname) {
+
+#define MAXFILENAME 1000 /* maximum length of a filename */
+
+ char filename[MAXFILENAME+10]; /* room for '.class' */
+ char *pathpos; /* position in searchpath */
+ char c, *utf_ptr; /* pointer to the next utf8-character */
+ FILE *classfile;
+ int filenamelen, err;
+ struct stat buffer;
+
+ if (classbuffer) /* classbuffer is already valid */
+ return true;
+
+ pathpos = classpath;
+
+ while (*pathpos) {
+
+ /* skip path separator */
+
+ while (*pathpos == ':')
+ pathpos++;
+
+ /* extract directory from searchpath */
+
+ filenamelen = 0;
+ while ((*pathpos) && (*pathpos!=':')) {
+ PANICIF (filenamelen >= MAXFILENAME, "Filename too long") ;
+ filename[filenamelen++] = *(pathpos++);
+ }
+
+ filename[filenamelen++] = '/';
+
+ /* add classname to filename */
+
+ utf_ptr = classname->text;
+ while (utf_ptr < utf_end(classname)) {
+ PANICIF (filenamelen >= MAXFILENAME, "Filename too long");
+ c = *utf_ptr++;
+ if ((c <= ' ' || c > 'z') && (c != '/')) /* invalid character */
+ c = '?';
+ filename[filenamelen++] = c;
+ }
+
+ /* add suffix */
-/****************************************************************************/
-/******************* Einige Support-Funkionen *******************************/
-/****************************************************************************/
+ strcpy (filename+filenamelen, ".class");
+ classfile = fopen(filename, "r");
+ if (classfile) { /* file exists */
+
+ /* determine size of classfile */
-/********** interne Funktion: printflags (nur zu Debug-Zwecken) ************/
+ err = stat (filename, &buffer);
+
+ if (!err) { /* read classfile data */
+ classbuffer_size = buffer.st_size;
+ classbuffer = MNEW(u1, classbuffer_size);
+ classbuf_pos = classbuffer-1;
+ fread(classbuffer, 1, classbuffer_size, classfile);
+ fclose(classfile);
+ return true;
+ }
+ }
+ }
+
+ if (verbose) {
+ sprintf (logtext, "Warning: Can not open class file '%s'", filename);
+ dolog();
+ }
+
+ return false;
+}
+
+
+/************************** function suck_stop *********************************
+
+ frees memory for buffer with classfile data.
+ Caution: this function may only be called if buffer has been allocated
+ by suck_start with reading a file
+
+*******************************************************************************/
+
+void suck_stop () {
+
+ /* determine amount of classdata not retrieved by suck-operations */
+
+ int classdata_left = ((classbuffer+classbuffer_size)-classbuf_pos-1);
+
+ if (classdata_left > 0) {
+ /* surplus */
+ sprintf (logtext,"There are %d access bytes at end of classfile",
+ classdata_left);
+ dolog();
+ }
+
+ /* free memory */
+
+ MFREE(classbuffer, u1, classbuffer_size);
+ classbuffer = NULL;
+}
+
+/******************************************************************************/
+/******************* Some support functions ***********************************/
+/******************************************************************************/
+
+
+/********** internal function: printflags (only for debugging) ***************/
static void printflags (u2 f)
{
}
-/************************* Funktion: skipattribute ****************************
+/************************* Function: skipattribute *****************************
- "uberliest im ClassFile eine (1) 'attribute'-Struktur
+ skips a (1) 'attribute' structure in the class file
-******************************************************************************/
+*******************************************************************************/
static void skipattribute ()
{
- u4 len;
-
suck_u2 ();
- len = suck_u4 ();
- skip_nbytes (len);
+ skip_nbytes(suck_u4());
}
-/********************** Funktion: skipattributebody ***************************
+/********************** Function: skipattributebody ****************************
- "uberliest im Classfile ein attribut, wobei die 16-bit - attribute_name -
- Referenz schon gelesen worden ist.
+ skips an attribute after the 16 bit reference to attribute_name has already
+ been read
-******************************************************************************/
+*******************************************************************************/
static void skipattributebody ()
{
- u4 len = suck_u4 ();
- skip_nbytes (len);
+ skip_nbytes(suck_u4());
}
+/************************* Function: skipattributes ****************************
-/************************* Funktion: skipattributes ***************************
-
- "uberliest im ClassFile eine gew"unschte Anzahl von attribute-Strukturen
+ skips num attribute structures
-******************************************************************************/
+*******************************************************************************/
static void skipattributes (u4 num)
{
u4 i;
- for (i=0; i<num; i++) skipattribute();
+ for (i = 0; i < num; i++)
+ skipattribute();
}
+/******************** function: innerclass_getconstant ************************
+ like class_getconstant, but if cptags is ZERO null is returned
+
+*******************************************************************************/
-/************************** Funktion: loadUtf8 ********************************
-
- liest aus dem ClassFile einen Utf8-String (=komprimierter unicode-text)
- und legt daf"ur ein unicode-Symbol an.
- Return: Zeiger auf das Symbol
+voidptr innerclass_getconstant (classinfo *c, u4 pos, u4 ctype)
+{
+ /* invalid position in constantpool */
+ if (pos >= c->cpcount)
+ panic ("Attempt to access constant outside range");
-******************************************************************************/
+ /* constantpool entry of type 0 */
+ if (!c->cptags[pos])
+ return NULL;
-#define MAXUNICODELEN 5000
-static u2 unicodebuffer[MAXUNICODELEN];
+ /* check type of constantpool entry */
+ if (c->cptags[pos] != ctype) {
+ sprintf (logtext, "Type mismatch on constant: %d requested, %d here",
+ (int) ctype, (int) c->cptags[pos] );
+ error();
+ }
+
+ return c->cpinfos[pos];
+}
-static unicode *loadUtf8 ()
-{
- u4 unicodelen;
- u4 letter;
+/************************ function: attribute_load ****************************
- u4 utflen;
- u4 b1,b2,b3;
+ read attributes from classfile
+
+*******************************************************************************/
- unicodelen = 0;
+static void attribute_load (u4 num, classinfo *c)
+{
+ u4 i,j;
- utflen = suck_u2 ();
- while (utflen > 0) {
- b1 = suck_u1 ();
- utflen --;
- if (b1<0x80) letter = b1;
- else {
- b2 = suck_u1 ();
- utflen --;
- if (b1<0xe0) letter = ((b1 & 0x1f) << 6) | (b2 & 0x3f);
- else {
- b3 = suck_u1 ();
- utflen --;
- letter = ((b1 & 0x0f) << 12) | ((b2 & 0x3f) << 6) | (b3 & 0x3f);
- }
- }
-
+ for (i = 0; i < num; i++) {
+ /* retrieve attribute name */
+ utf *aname = class_getconstant (c, suck_u2(), CONSTANT_Utf8);
- if (unicodelen >= MAXUNICODELEN) {
- panic ("String constant too long");
+ if ( aname == utf_innerclasses) {
+ /* innerclasses attribute */
+
+ /* skip attribute length */
+ suck_u4();
+ /* number of records */
+ c->innerclasscount = suck_u2();
+ /* allocate memory for innerclass structure */
+ c->innerclass = MNEW (innerclassinfo, c->innerclasscount);
+
+ for (j=0;j<c->innerclasscount;j++) {
+
+ /* The innerclass structure contains a class with an encoded name,
+ its defining scope, its simple name and a bitmask of the access flags.
+ If an inner class is not a member, its outer_class is NULL,
+ if a class is anonymous, its name is NULL. */
+
+ innerclassinfo *info = c->innerclass + j;
+
+ info->inner_class = innerclass_getconstant(c, suck_u2(), CONSTANT_Class); /* CONSTANT_Class_info index */
+ info->outer_class = innerclass_getconstant(c, suck_u2(), CONSTANT_Class); /* CONSTANT_Class_info index */
+ info->name = innerclass_getconstant(c, suck_u2(), CONSTANT_Utf8); /* CONSTANT_Utf8_info index */
+ info->flags = suck_u2 (); /* access_flags bitmask */
}
-
- unicodebuffer[unicodelen++] = letter;
+ } else {
+ /* unknown attribute */
+ skipattributebody ();
}
+ }
+}
+
+/******************* function: checkfielddescriptor ****************************
+ checks whether a field-descriptor is valid and aborts otherwise
+ all referenced classes are inserted into the list of unloaded classes
- return unicode_new_u2 (unicodebuffer, unicodelen);
-}
+*******************************************************************************/
+static void checkfielddescriptor (char *utf_ptr, char *end_pos)
+{
+ char *tstart; /* pointer to start of classname */
+ char ch;
+
+ switch (*utf_ptr++) {
+ case 'B':
+ case 'C':
+ case 'I':
+ case 'S':
+ case 'Z':
+ case 'J':
+ case 'F':
+ case 'D':
+ /* primitive type */
+ break;
+ case 'L':
+ /* save start of classname */
+ tstart = utf_ptr;
+
+ /* determine length of classname */
+ while ( *utf_ptr++ != ';' )
+ if (utf_ptr>=end_pos)
+ panic ("Missing ';' in objecttype-descriptor");
-/******************** interne Funktion: checkfieldtype ***********************/
+ /* cause loading of referenced class */
+ class_new ( utf_new(tstart, utf_ptr-tstart-1) );
+ break;
-static void checkfieldtype (u2 *text, u4 *count, u4 length)
-{
- u4 l;
+ case '[' :
+ /* array type */
+ while ((ch = *utf_ptr++)=='[')
+ /* skip */ ;
- if (*count >= length) panic ("Type-descriptor exceeds unicode length");
-
- l = text[(*count)++];
-
- switch (l) {
- default: panic ("Invalid symbol in type descriptor");
- return;
+ /* component type of array */
+ switch (ch) {
case 'B':
case 'C':
- case 'D':
- case 'F':
case 'I':
- case 'J':
case 'S':
- case 'Z': return;
-
- case '[': checkfieldtype (text, count, length);
- return;
-
- case 'L':
- {
- u4 tlen,tstart = *count;
+ case 'Z':
+ case 'J':
+ case 'F':
+ case 'D':
+ /* primitive type */
+ break;
- if (*count >= length)
- panic ("Objecttype descriptor of length zero");
+ case 'L':
+ /* save start of classname */
+ tstart = utf_ptr;
- while ( text[*count] != ';' ) {
- (*count)++;
- if (*count >= length)
- panic ("Missing ';' in objecttype-descriptor");
- }
+ /* determine length of classname */
+ while ( *utf_ptr++ != ';' )
+ if (utf_ptr>=end_pos)
+ panic ("Missing ';' in objecttype-descriptor");
+
+ /* cause loading of referenced class */
+ class_new ( utf_new(tstart, utf_ptr-tstart-1) );
+ break;
+
+ default:
+ panic ("Ill formed methodtype-descriptor");
+ }
+ break;
- tlen = (*count) - tstart;
- (*count)++;
+ default:
+ panic ("Ill formed methodtype-descriptor");
+ }
- if (tlen == 0) panic ("Objecttype descriptor with empty name");
-
- class_get ( unicode_new_u2 (text+tstart, tlen) );
- }
- }
+ /* exceeding characters */
+ if (utf_ptr!=end_pos) panic ("descriptor has exceeding chars");
}
-/******************* Funktion: checkfielddescriptor ***************************
+/******************* function checkmethoddescriptor ****************************
- "uberpr"uft, ob ein Field-Descriptor ein g"ultiges Format hat.
- Wenn nicht, dann wird das System angehalten.
- Au"serdem werden alle Klassen, die hier referenziert werden,
- in die Liste zu ladender Klassen eingetragen.
+ checks whether a method-descriptor is valid and aborts otherwise.
+ All referenced classes are inserted into the list of unloaded classes.
-******************************************************************************/
+*******************************************************************************/
-void checkfielddescriptor (unicode *d)
+static void checkmethoddescriptor (utf *d)
{
- u4 count=0;
- checkfieldtype (d->text, &count, d->length);
- if (count != d->length) panic ("Invalid type-descritor encountered");
-}
+ char *utf_ptr = d->text; /* current position in utf text */
+ char *end_pos = utf_end(d); /* points behind utf string */
+ char *tstart; /* pointer to start of classname */
+ char c,ch;
+
+ /* method descriptor must start with parenthesis */
+ if (*utf_ptr++ != '(') panic ("Missing '(' in method descriptor");
+
+ /* check arguments */
+ while ((c = *utf_ptr++) != ')') {
+ switch (c) {
+ case 'B':
+ case 'C':
+ case 'I':
+ case 'S':
+ case 'Z':
+ case 'J':
+ case 'F':
+ case 'D':
+ /* primitive type */
+ break;
+ case 'L':
+ /* save start of classname */
+ tstart = utf_ptr;
+
+ /* determine length of classname */
+ while ( *utf_ptr++ != ';' )
+ if (utf_ptr>=end_pos)
+ panic ("Missing ';' in objecttype-descriptor");
+
+ /* cause loading of referenced class */
+ class_new ( utf_new(tstart, utf_ptr-tstart-1) );
+ break;
+
+ case '[' :
+ /* array type */
+ while ((ch = *utf_ptr++)=='[')
+ /* skip */ ;
+
+ /* component type of array */
+ switch (ch) {
+ case 'B':
+ case 'C':
+ case 'I':
+ case 'S':
+ case 'Z':
+ case 'J':
+ case 'F':
+ case 'D':
+ /* primitive type */
+ break;
-/******************* Funktion: checkmethoddescriptor **************************
+ case 'L':
+ /* save start of classname */
+ tstart = utf_ptr;
+
+ /* determine length of classname */
+ while ( *utf_ptr++ != ';' )
+ if (utf_ptr>=end_pos)
+ panic ("Missing ';' in objecttype-descriptor");
- "uberpr"uft, ob ein Method-Descriptor ein g"ultiges Format hat.
- Wenn nicht, dann wird das System angehalten.
- Au"serdem werden alle Klassen, die hier referenziert werden,
- in die Liste zu ladender Klassen eingetragen.
-
-******************************************************************************/
+ /* cause loading of referenced class */
+ class_new ( utf_new(tstart, utf_ptr-tstart-1) );
+ break;
-void checkmethoddescriptor (unicode *d)
-{
- u2 *text=d->text;
- u4 length=d->length;
- u4 count=0;
-
- if (length<2) panic ("Method descriptor too short");
- if (text[0] != '(') panic ("Missing '(' in method descriptor");
- count=1;
-
- while (text[count] != ')') {
- checkfieldtype (text,&count,length);
- if ( count > length-2 ) panic ("Unexpected end of descriptor");
- }
-
- count++;
- if (text[count] == 'V') count++;
- else checkfieldtype (text, &count,length);
-
- if (count != length) panic ("Method-descriptor has exceeding chars");
+ default:
+ panic ("Ill formed methodtype-descriptor");
+ }
+ break;
+
+ default:
+ panic ("Ill formed methodtype-descriptor");
+ }
+ }
+
+ /* check returntype */
+ if (*utf_ptr=='V') {
+ /* returntype void */
+ if ((utf_ptr+1) != end_pos) panic ("Method-descriptor has exceeding chars");
+ }
+ else
+ /* treat as field-descriptor */
+ checkfielddescriptor (utf_ptr,end_pos);
}
-/******************** Funktion: buildarraydescriptor ****************************
+/******************** Function: buildarraydescriptor ***************************
- erzeugt zu einem namentlich als u2-String vorliegenden Arraytyp eine
- entsprechende constant_arraydescriptor - Struktur
+ creates a constant_arraydescriptor structure for the array type named by an
+ utf string
-********************************************************************************/
+*******************************************************************************/
-static constant_arraydescriptor * buildarraydescriptor(u2 *name, u4 namelen)
+constant_arraydescriptor * buildarraydescriptor(char *utf_ptr, u4 namelen)
{
constant_arraydescriptor *d;
- if (name[0]!='[') panic ("Attempt to build arraydescriptor for non-array");
+ if (*utf_ptr++ != '[') panic ("Attempt to build arraydescriptor for non-array");
+
d = NEW (constant_arraydescriptor);
d -> objectclass = NULL;
d -> elementdescriptor = NULL;
count_const_pool_len += sizeof(constant_arraydescriptor);
#endif
- switch (name[1]) {
+ switch (*utf_ptr) {
case 'Z': d -> arraytype = ARRAYTYPE_BOOLEAN; break;
case 'B': d -> arraytype = ARRAYTYPE_BYTE; break;
case 'C': d -> arraytype = ARRAYTYPE_CHAR; break;
case '[':
d -> arraytype = ARRAYTYPE_ARRAY;
- d -> elementdescriptor = buildarraydescriptor (name+1, namelen-1);
+ d -> elementdescriptor = buildarraydescriptor (utf_ptr, namelen-1);
break;
case 'L':
d -> arraytype = ARRAYTYPE_OBJECT;
- d -> objectclass = class_get ( unicode_new_u2 (name+2, namelen-3) );
+ d -> objectclass = class_new ( utf_new(utf_ptr+1, namelen-3) );
break;
}
return d;
}
-/******************* Funktion: freearraydescriptor ****************************
+/******************* Function: freearraydescriptor *****************************
- entfernt eine mit buildarraydescriptor erzeugte Struktur wieder
- aus dem Speicher
+ removes a structure created by buildarraydescriptor from memory
*******************************************************************************/
}
}
-/*********************** Funktion: displayarraydescriptor *********************/
+/*********************** Function: displayarraydescriptor *********************/
static void displayarraydescriptor (constant_arraydescriptor *d)
{
case ARRAYTYPE_LONG: printf ("long[]"); break;
case ARRAYTYPE_SHORT: printf ("short[]"); break;
case ARRAYTYPE_ARRAY: displayarraydescriptor(d->elementdescriptor); printf("[]"); break;
- case ARRAYTYPE_OBJECT: unicode_display(d->objectclass->name); printf("[]"); break;
+ case ARRAYTYPE_OBJECT: utf_display(d->objectclass->name); printf("[]"); break;
}
}
-/*****************************************************************************/
-/******************** Funktionen fuer Fields *********************************/
-/*****************************************************************************/
+/******************************************************************************/
+/******************** Functionen fuer Fields **********************************/
+/******************************************************************************/
-/************************ Funktion: field_load ********************************
+/************************ Function: field_load *********************************
l"adt alle Informationen f"ur eine Feld einer Methode aus dem ClassFile,
und f"ullt mit diesen Infos eine schon existierende 'fieldinfo'-Struktur.
Bei 'static'-Fields wird auch noch ein Platz auf dem Datensegment
reserviert.
-******************************************************************************/
+*******************************************************************************/
static void field_load (fieldinfo *f, classinfo *c)
{
u4 attrnum,i;
u4 jtype;
- f -> flags = suck_u2 ();
- f -> name = class_getconstant (c, suck_u2(), CONSTANT_Utf8);
- f -> descriptor = class_getconstant (c, suck_u2(), CONSTANT_Utf8);
- f -> type = jtype = desc_to_type (f->descriptor);
- f -> offset = 0;
-
+ f -> flags = suck_u2 (); /* ACC flags */
+ f -> name = class_getconstant (c, suck_u2(), CONSTANT_Utf8); /* name of field */
+ f -> descriptor = class_getconstant (c, suck_u2(), CONSTANT_Utf8); /* JavaVM descriptor */
+ f -> type = jtype = desc_to_type (f->descriptor); /* data type */
+ f -> offset = 0; /* offset from start of object */
+
switch (f->type) {
case TYPE_INT: f->value.i = 0; break;
case TYPE_FLOAT: f->value.f = 0.0; break;
case TYPE_DOUBLE: f->value.d = 0.0; break;
- case TYPE_ADDRESS: f->value.a = NULL;
- heap_addreference (&(f->value.a));
+ case TYPE_ADDRESS: f->value.a = NULL;
+ heap_addreference (&(f->value.a)); /* make global reference (GC) */
break;
case TYPE_LONG:
#if U8_AVAILABLE
f->value.l.low = 0; f->value.l.high = 0; break;
#endif
}
-
+
+ /* read attributes */
attrnum = suck_u2();
for (i=0; i<attrnum; i++) {
u4 pindex;
- unicode *aname;
+ utf *aname;
aname = class_getconstant (c, suck_u2(), CONSTANT_Utf8);
-
- if ( aname != unicode_new_char ("ConstantValue") ) {
+
+ if ( aname != utf_constantvalue ) {
+ /* unknown attribute */
skipattributebody ();
}
else {
+ /* constant value attribute */
+
+ /* skip attribute length */
suck_u4();
+ /* index of value in constantpool */
pindex = suck_u2();
-
+
+ /* initialize field with value from constantpool */
switch (jtype) {
case TYPE_INT: {
constant_integer *ci =
}
break;
- case TYPE_ADDRESS: {
- unicode *u =
- class_getconstant(c, pindex, CONSTANT_String);
+ case TYPE_ADDRESS: {
+ utf *u = class_getconstant(c, pindex, CONSTANT_String);
+ /* create javastring from compressed utf8-string */
f->value.a = literalstring_new(u);
}
break;
}
}
-
}
-/********************** Funktion: field_free *********************************/
+/********************** function: field_free **********************************/
static void field_free (fieldinfo *f)
{
+ /* empty */
}
-/************** Funktion: field_display (nur zu Debug-Zwecken) ***************/
+/************** Function: field_display (nur zu Debug-Zwecken) ****************/
static void field_display (fieldinfo *f)
{
printf (" ");
printflags (f -> flags);
printf (" ");
- unicode_display (f -> name);
+ utf_display (f -> name);
printf (" ");
- unicode_display (f -> descriptor);
+ utf_display (f -> descriptor);
printf (" offset: %ld\n", (long int) (f -> offset) );
}
+/******************************************************************************/
+/************************* Functions for methods ******************************/
+/******************************************************************************/
-/*****************************************************************************/
-/************************* Funktionen f"ur Methods ***************************/
-/*****************************************************************************/
-
-
-/*********************** Funktion: method_load ********************************
+/*********************** Function: method_load *********************************
- l"adt die Infos f"ur eine Methode aus dem ClassFile und f"ullt damit
- eine schon existierende 'methodinfo'-Struktur aus.
- Bei allen native-Methoden wird au"serdem gleich der richtige
- Funktionszeiger eingetragen, bei JavaVM-Methoden einstweilen ein
- Zeiger auf den Compiler
+ Loads a method from the class file and fills an existing 'methodinfo'
+ structure. For native methods, the function pointer field is set to the
+ real function pointer, for JavaVM methods a pointer to the compiler is used
+ preliminarily.
-******************************************************************************/
+*******************************************************************************/
static void method_load (methodinfo *m, classinfo *c)
{
m -> stubroutine = createcompilerstub (m);
}
else {
+
functionptr f = native_findfunction
(c->name, m->name, m->descriptor, (m->flags & ACC_STATIC) != 0);
if (f) {
+#ifdef OLD_COMPILER
if (newcompiler)
- m -> stubroutine = ncreatenativestub (f, m);
- else
+#endif
m -> stubroutine = createnativestub (f, m);
+#ifdef OLD_COMPILER
+ else
+ m -> stubroutine = oldcreatenativestub (f, m);
+#endif
}
}
attrnum = suck_u2();
for (i=0; i<attrnum; i++) {
- unicode *aname;
+ utf *aname;
aname = class_getconstant (c, suck_u2(), CONSTANT_Utf8);
- if ( aname != unicode_new_char("Code")) {
+ if ( aname != utf_code) {
skipattributebody ();
}
else {
}
-
}
+/********************* Function: method_free ***********************************
-/********************* Funktion: method_free **********************************
-
- gibt allen Speicher, der extra f"ur eine Methode angefordert wurde,
- wieder frei
+ frees all memory that was allocated for this method
-******************************************************************************/
+*******************************************************************************/
static void method_free (methodinfo *m)
{
}
-/************** Funktion: method_display (nur zu Debug-Zwecken) *************/
+/************** Function: method_display (debugging only) **************/
void method_display (methodinfo *m)
{
printf (" ");
printflags (m -> flags);
printf (" ");
- unicode_display (m -> name);
+ utf_display (m -> name);
printf (" ");
- unicode_display (m -> descriptor);
+ utf_display (m -> descriptor);
printf ("\n");
}
-/******************** Funktion: method_canoverwrite ***************************
+/******************** Function: method_canoverwrite ****************************
- "uberpr"ft, ob eine Methode mit einer anderen typ- und namensidentisch
- ist (also mit einer Methodendefinition eine andere "uberschrieben
- werden kann).
+ Check if m and old are identical with respect to type and name. This means
+ that old can be overwritten with m.
-******************************************************************************/
+*******************************************************************************/
static bool method_canoverwrite (methodinfo *m, methodinfo *old)
{
-/*****************************************************************************/
-/************************ Funktionen fuer Class ******************************/
-/*****************************************************************************/
+/******************************************************************************/
+/************************ Functions for class *********************************/
+/******************************************************************************/
-/******************** Funktion: class_get *************************************
+/******************** function: class_getconstant ******************************
- Sucht im System die Klasse mit dem gew"unschten Namen, oder erzeugt
- eine neue 'classinfo'-Struktur (und h"angt sie in die Liste der zu
- ladenen Klassen ein).
+ retrieves the value at position 'pos' of the constantpool of a class
+ if the type of the value is other than 'ctype' the system is stopped
-******************************************************************************/
-
-classinfo *class_get (unicode *u)
-{
- classinfo *c;
-
- if (u->class) return u->class;
-
-#ifdef STATISTICS
- count_class_infos += sizeof(classinfo);
-#endif
-
- c = NEW (classinfo);
- c -> flags = 0;
- c -> name = u;
- c -> cpcount = 0;
- c -> cptags = NULL;
- c -> cpinfos = NULL;
- c -> super = NULL;
- c -> sub = NULL;
- c -> nextsub = NULL;
- c -> interfacescount = 0;
- c -> interfaces = NULL;
- c -> fieldscount = 0;
- c -> fields = NULL;
- c -> methodscount = 0;
- c -> methods = NULL;
- c -> linked = false;
- c -> index = 0;
- c -> instancesize = 0;
- c -> vftbl = NULL;
- c -> initialized = false;
-
- unicode_setclasslink (u,c);
- list_addlast (&unloadedclasses, c);
-
- return c;
-}
-
-
-
-/******************** Funktion: class_getconstant *****************************
-
- holt aus dem ConstantPool einer Klasse den Wert an der Stelle 'pos'.
- Der Wert mu"s vom Typ 'ctype' sein, sonst wird das System angehalten.
-
-******************************************************************************/
+*******************************************************************************/
voidptr class_getconstant (classinfo *c, u4 pos, u4 ctype)
{
+ /* invalid position in constantpool */
if (pos >= c->cpcount)
panic ("Attempt to access constant outside range");
+
+ /* check type of constantpool entry */
if (c->cptags[pos] != ctype) {
sprintf (logtext, "Type mismatch on constant: %d requested, %d here",
(int) ctype, (int) c->cptags[pos] );
}
-/********************* Funktion: class_constanttype ***************************
+/********************* Function: class_constanttype ****************************
- Findet heraus, welchen Typ ein Eintrag in den ConstantPool einer
- Klasse hat.
+ Determines the type of a class entry in the ConstantPool
-******************************************************************************/
+*******************************************************************************/
u4 class_constanttype (classinfo *c, u4 pos)
{
}
-/******************** Funktion: class_loadcpool *******************************
+/******************** function: class_loadcpool ********************************
- l"adt den gesammten ConstantPool einer Klasse.
-
- Dabei werden die einzelnen Eintr"age in ein wesentlich einfachers
- Format gebracht (Klassenreferenzen werden aufgel"ost, ...)
- F"ur eine genaue "Ubersicht "uber das kompakte Format siehe: 'global.h'
+ loads the constantpool of a class,
+ the entries are transformed into a simpler format
+ by resolving references
+ (a detailed overview of the compact structures can be found in global.h)
-******************************************************************************/
+*******************************************************************************/
static void class_loadcpool (classinfo *c)
{
- typedef struct forward_class { /* Diese Strukturen dienen dazu, */
- struct forward_class *next; /* die Infos, die beim ersten */
- u2 thisindex; /* Durchgang durch den ConstantPool */
- u2 name_index; /* gelesen werden, aufzunehmen. */
- } forward_class; /* Erst nachdem der ganze Pool */
- /* gelesen wurde, k"onnen alle */
- typedef struct forward_string { /* Felder kompletiert werden */
- struct forward_string *next; /* (und das auch nur in der richtigen */
- u2 thisindex; /* Reihenfolge) */
+ /* The following structures are used to save information which cannot be
+ processed during the first pass. After the complete constantpool has
+ been traversed the references can be resolved.
+ (only in specific order) */
+
+ /* CONSTANT_Class_info entries */
+ typedef struct forward_class {
+ struct forward_class *next;
+ u2 thisindex;
+ u2 name_index;
+ } forward_class;
+
+ /* CONSTANT_String */
+ typedef struct forward_string {
+ struct forward_string *next;
+ u2 thisindex;
u2 string_index;
} forward_string;
+ /* CONSTANT_NameAndType */
typedef struct forward_nameandtype {
struct forward_nameandtype *next;
u2 thisindex;
u2 sig_index;
} forward_nameandtype;
+ /* CONSTANT_Fieldref, CONSTANT_Methodref or CONSTANT_InterfaceMethodref */
typedef struct forward_fieldmethint {
struct forward_fieldmethint *next;
u2 thisindex;
} forward_fieldmethint;
-
u4 idx;
long int dumpsize = dump_size ();
forward_nameandtype *forward_nameandtypes = NULL;
forward_fieldmethint *forward_fieldmethints = NULL;
+ /* number of entries in the constant_pool table */
u4 cpcount = c -> cpcount = suck_u2();
+ /* allocate memory */
u1 *cptags = c -> cptags = MNEW (u1, cpcount);
- voidptr *cpinfos = c -> cpinfos = MNEW (voidptr, cpcount);
+ voidptr *cpinfos = c -> cpinfos = MNEW (voidptr, cpcount);
#ifdef STATISTICS
count_const_pool_len += (sizeof(voidptr) + 1) * cpcount;
#endif
-
+ /* initialize constantpool */
for (idx=0; idx<cpcount; idx++) {
cptags[idx] = CONSTANT_UNUSED;
cpinfos[idx] = NULL;
}
- /******* Erster Durchgang *******/
- /* Alle Eintr"age, die nicht unmittelbar aufgel"ost werden k"onnen,
- werden einmal `auf Vorrat' in tempor"are Strukturen eingelesen,
- und dann am Ende nocheinmal durchgegangen */
-
+ /******* first pass *******/
+ /* entries which cannot be resolved now are written into
+ temporary structures and traversed again later */
+
idx = 1;
while (idx < cpcount) {
- u4 t = suck_u1 ();
+ /* get constant type */
+ u4 t = suck_u1 ();
switch ( t ) {
case CONSTANT_Class: {
forward_classes = nfc;
nfc -> thisindex = idx;
- nfc -> name_index = suck_u2 ();
+ /* reference to CONSTANT_NameAndType */
+ nfc -> name_index = suck_u2 ();
idx++;
break;
case CONSTANT_Fieldref:
case CONSTANT_Methodref:
- case CONSTANT_InterfaceMethodref: {
+ case CONSTANT_InterfaceMethodref: {
forward_fieldmethint *nff = DNEW (forward_fieldmethint);
nff -> next = forward_fieldmethints;
forward_fieldmethints = nff;
nff -> thisindex = idx;
+ /* constant type */
nff -> tag = t;
- nff -> class_index = suck_u2 ();
+ /* class or interface type that contains the declaration of the field or method */
+ nff -> class_index = suck_u2 ();
+ /* name and descriptor of the field or method */
nff -> nameandtype_index = suck_u2 ();
- idx ++;
+ idx ++;
break;
}
forward_strings = nfs;
nfs -> thisindex = idx;
+ /* reference to CONSTANT_Utf8_info with string characters */
nfs -> string_index = suck_u2 ();
idx ++;
forward_nameandtypes = nfn;
nfn -> thisindex = idx;
+ /* reference to CONSTANT_Utf8_info containing simple name */
nfn -> name_index = suck_u2 ();
+ /* reference to CONSTANT_Utf8_info containing field or method descriptor */
nfn -> sig_index = suck_u2 ();
idx ++;
break;
}
- case CONSTANT_Utf8: {
- unicode *u;
-
- u = loadUtf8 ();
-
- cptags [idx] = CONSTANT_Utf8;
- cpinfos [idx] = u;
+ case CONSTANT_Utf8: {
+
+ /* number of bytes in the bytes array (not string-length) */
+ u4 length = suck_u2();
+ cptags [idx] = CONSTANT_Utf8;
+ /* insert utf-string into the utf-symboltable */
+ cpinfos [idx] = utf_new(classbuf_pos+1, length);
+ /* skip bytes of the string */
+ skip_nbytes(length);
idx++;
break;
}
- /* Aufl"osen der noch unfertigen Eintr"age */
+ /* resolve entries in temporary structures */
while (forward_classes) {
- unicode *name =
+ utf *name =
class_getconstant (c, forward_classes -> name_index, CONSTANT_Utf8);
- if ( (name->length>0) && (name->text[0]=='[') ) {
- checkfielddescriptor (name);
+ if ( (name->blength>0) && (name->text[0]=='[') ) {
+ /* check validity of descriptor */
+ checkfielddescriptor (name->text, utf_end(name));
cptags [forward_classes -> thisindex] = CONSTANT_Arraydescriptor;
cpinfos [forward_classes -> thisindex] =
- buildarraydescriptor(name->text, name->length);
+ buildarraydescriptor(name->text, name->blength);
}
- else {
+ else {
cptags [forward_classes -> thisindex] = CONSTANT_Class;
- cpinfos [forward_classes -> thisindex] = class_get (name);
+ /* retrieve class from class-table */
+ cpinfos [forward_classes -> thisindex] = class_new (name);
}
forward_classes = forward_classes -> next;
}
while (forward_strings) {
- unicode *text =
+ utf *text =
class_getconstant (c, forward_strings -> string_index, CONSTANT_Utf8);
-
+
+ /* resolve utf-string */
cptags [forward_strings -> thisindex] = CONSTANT_String;
cpinfos [forward_strings -> thisindex] = text;
count_const_pool_len += sizeof(constant_nameandtype);
#endif
+ /* resolve simple name and descriptor */
cn -> name = class_getconstant
(c, forward_nameandtypes -> name_index, CONSTANT_Utf8);
cn -> descriptor = class_getconstant
#ifdef STATISTICS
count_const_pool_len += sizeof(constant_FMIref);
#endif
-
+ /* resolve simple name and descriptor */
nat = class_getconstant
(c, forward_fieldmethints -> nameandtype_index, CONSTANT_NameAndType);
cpinfos [forward_fieldmethints -> thisindex] = fmi;
switch (forward_fieldmethints -> tag) {
- case CONSTANT_Fieldref: checkfielddescriptor (fmi->descriptor);
+ case CONSTANT_Fieldref: /* check validity of descriptor */
+ checkfielddescriptor (fmi->descriptor->text,utf_end(fmi->descriptor));
break;
case CONSTANT_InterfaceMethodref:
- case CONSTANT_Methodref: checkmethoddescriptor (fmi->descriptor);
+ case CONSTANT_Methodref: /* check validity of descriptor */
+ checkmethoddescriptor (fmi->descriptor);
break;
}
}
-/********************** Funktion: class_load **********************************
-
- l"adt alle Infos f"ur eine ganze Klasse aus einem ClassFile. Die
- 'classinfo'-Struktur mu"s bereits angelegt worden sein.
-
- Die Superklasse und die Interfaces, die diese Klasse implementiert,
- m"ussen zu diesem Zeitpunkt noch nicht geladen sein, die
- Verbindung dazu wird sp"ater in der Funktion 'class_link' hergestellt.
+/********************** Function: class_load ***********************************
- Die gelesene Klasse wird dann aus der Liste 'unloadedclasses' ausgetragen
- und in die Liste 'unlinkedclasses' eingh"angt.
+ Loads everything interesting about a class from the class file. The
+ 'classinfo' structure must have been allocated previously.
+
+ The super class and the interfaces implemented by this class need not be
+ loaded. The link is set later by the function 'class_link'.
+
+ The loaded class is removed from the list 'unloadedclasses' and added to
+ the list 'unlinkedclasses'.
-******************************************************************************/
+*******************************************************************************/
-static void class_load (classinfo *c)
+static int class_load (classinfo *c)
{
u4 i;
u4 mi,ma;
+#ifdef STATISTICS
+ count_class_loads++;
+#endif
- if (loadverbose) {
+ /* output for debugging purposes */
+ if (loadverbose) {
sprintf (logtext, "Loading class: ");
- unicode_sprint (logtext+strlen(logtext), c->name );
+ utf_sprint (logtext+strlen(logtext), c->name );
dolog();
}
-
-
- suck_start (c->name);
-
- if (suck_u4() != MAGIC) panic("Can not find class-file signature");
+
+ /* load classdata, throw exception on error */
+ if (!suck_start (c->name)) {
+ throw_classnotfoundexception();
+ return false;
+ }
+
+ /* check signature */
+ if (suck_u4() != MAGIC) panic("Can not find class-file signature");
+ /* check version */
mi = suck_u2();
ma = suck_u2();
if (ma != MAJOR_VERSION) {
class_loadcpool (c);
- c -> flags = suck_u2 ();
- suck_u2 (); /* this */
+ /* ACC flags */
+ c -> flags = suck_u2 ();
+ /* this class */
+ suck_u2 ();
+ /* retrieve superclass */
if ( (i = suck_u2 () ) ) {
c -> super = class_getconstant (c, i, CONSTANT_Class);
}
c -> super = NULL;
}
+ /* retrieve interfaces */
c -> interfacescount = suck_u2 ();
c -> interfaces = MNEW (classinfo*, c -> interfacescount);
for (i=0; i < c -> interfacescount; i++) {
class_getconstant (c, suck_u2(), CONSTANT_Class);
}
+ /* load fields */
c -> fieldscount = suck_u2 ();
c -> fields = MNEW (fieldinfo, c -> fieldscount);
for (i=0; i < c -> fieldscount; i++) {
field_load (&(c->fields[i]), c);
}
+ /* load methods */
c -> methodscount = suck_u2 ();
c -> methods = MNEW (methodinfo, c -> methodscount);
for (i=0; i < c -> methodscount; i++) {
count_class_infos += sizeof(methodinfo) * c -> methodscount;
#endif
+ /* load variable-length attribute structures */
+ attribute_load (suck_u2(), c);
- skipattributes ( suck_u2() );
-
-
+ /* free memory */
suck_stop ();
+ /* remove class from list of unloaded classes and
+ add to list of unlinked classes */
list_remove (&unloadedclasses, c);
list_addlast (&unlinkedclasses, c);
+
+ return true;
}
-/************** interne Funktion: class_highestinterface **********************
+/************** internal Function: class_highestinterface ***********************
- wird von der Funktion class_link ben"otigt, um festzustellen, wie gro"s
- die Interfacetable einer Klasse sein mu"s.
+ Used by the function class_link to determine the amount of memory needed
+ for the interface table.
-******************************************************************************/
+*******************************************************************************/
static s4 class_highestinterface (classinfo *c)
{
if ( ! (c->flags & ACC_INTERFACE) ) {
sprintf (logtext, "Interface-methods count requested for non-interface: ");
- unicode_sprint (logtext+strlen(logtext), c->name);
+ utf_sprint (logtext+strlen(logtext), c->name);
error();
}
}
-/**************** Funktion: class_addinterface ********************************
+/* class_addinterface **********************************************************
- wird von der Funktion class_link ben"otigt, um eine Virtual Function
- Table f"ur ein Interface (und alle weiteren von diesem Interface
- implementierten Interfaces) in eine Klasse einzutragen.
+ Is needed by class_link for adding a VTBL to a class. All interfaces
+ implemented by ic are added as well.
-******************************************************************************/
+*******************************************************************************/
static void class_addinterface (classinfo *c, classinfo *ic)
{
- u4 i = ic->index;
- u4 j,m;
+ s4 j, m;
+ s4 i = ic->index;
vftbl *vftbl = c->vftbl;
- if (i>=vftbl->interfacetablelength) panic ("Interfacetable-Overflow");
- if (vftbl->interfacevftbl[i]) return;
+ if (i >= vftbl->interfacetablelength)
+ panic ("Inernal error: interfacetable overflow");
+ if (vftbl->interfacetable[-i])
+ return;
- if (ic->methodscount==0) { /* wenn interface keine Methoden hat, dann
- trotzdem eine Tabelle mit L"ange 1 anlegen,
- wegen Subclass-Tests */
- vftbl -> interfacevftbllength[i] = 1;
- vftbl -> interfacevftbl[i] = MNEW(methodptr, 1);
- vftbl -> interfacevftbl[i][0] = NULL;
+ if (ic->methodscount == 0) { /* fake entry needed for subtype test */
+ vftbl->interfacevftbllength[i] = 1;
+ vftbl->interfacetable[-i] = MNEW(methodptr, 1);
+ vftbl->interfacetable[-i][0] = NULL;
}
else {
- vftbl -> interfacevftbllength[i] = ic -> methodscount;
- vftbl -> interfacevftbl[i] = MNEW(methodptr, ic -> methodscount);
+ vftbl->interfacevftbllength[i] = ic->methodscount;
+ vftbl->interfacetable[-i] = MNEW(methodptr, ic->methodscount);
#ifdef STATISTICS
- count_vftbl_len += sizeof(methodptr) * ic -> methodscount;
+ count_vftbl_len += sizeof(methodptr) *
+ (ic->methodscount + (ic->methodscount == 0));
#endif
for (j=0; j<ic->methodscount; j++) {
classinfo *sc = c;
while (sc) {
- for (m=0; m<sc->methodscount; m++) {
+ for (m = 0; m < sc->methodscount; m++) {
methodinfo *mi = &(sc->methods[m]);
- if (method_canoverwrite (mi, &(ic->methods[j])) ) {
- vftbl->interfacevftbl[i][j] =
- vftbl->table[mi->vftblindex];
+ if (method_canoverwrite(mi, &(ic->methods[j]))) {
+ vftbl->interfacetable[-i][j] =
+ vftbl->table[mi->vftblindex];
goto foundmethod;
}
}
foundmethod: ;
}
}
-
- for (j=0; j<ic->interfacescount; j++)
+
+ for (j = 0; j < ic->interfacescount; j++)
class_addinterface(c, ic->interfaces[j]);
}
-/********************** Funktion: class_link **********************************
+/********************** Function: class_link ***********************************
- versucht, eine Klasse in das System voll zu integrieren (linken). Dazu
- m"ussen sowol die Superklasse, als auch alle implementierten
- Interfaces schon gelinkt sein.
- Diese Funktion berechnet sowohl die L"ange (in Bytes) einer Instanz
- dieser Klasse, als auch die Virtual Function Tables f"ur normale
- Methoden als auch Interface-Methoden.
+ Tries to link a class. The super class and every implemented interface must
+ already have been linked. The function calculates the length in bytes that
+ an instance of this class requires as well as the VTBL for methods and
+ interface methods.
- Wenn die Klasse erfolgreich gelinkt werden kann, dann wird sie aus
- der Liste 'unlinkedclasses' ausgeh"angt, und in die Klasse 'linkedclasses'
- eingetragen.
- Wenn nicht, dann wird sie ans Ende der Liste 'unlinkedclasses' gestellt.
+ If the class can be linked, it is removed from the list 'unlinkedclasses'
+ and added to 'linkedclasses'. Otherwise, it is moved to the end of
+ 'unlinkedclasses'.
- Achtung: Bei zyklischen Klassendefinitionen ger"at das Programm hier in
- eine Endlosschleife!! (Da muss ich mir noch was einfallen lassen)
+ Attention: If cyclical class definitions are encountered, the program gets
+ into an infinite loop (we'll have to work that out)
-******************************************************************************/
+*******************************************************************************/
static void class_link (classinfo *c)
{
- u4 supervftbllength; /* L"ange der VFTBL der Superklasse */
- u4 vftbllength; /* L"ange der VFTBL dieser Klasse */
- classinfo *super = c->super;
- classinfo *ic,*c2; /* Hilfsvariablen */
- vftbl *v;
- u4 i;
+ s4 supervftbllength; /* vftbllegnth of super class */
+ s4 vftbllength; /* vftbllength of current class */
+ s4 interfacetablelength; /* interface table length */
+ classinfo *super = c->super; /* super class */
+ classinfo *ic, *c2; /* intermediate class variables */
+ vftbl *v; /* vftbl of current class */
+ s4 i; /* interface/method/field counter */
+
+ /* check if all superclasses are already linked, if not put c at end of
+ unlinked list and return. Additionally initialize class fields. */
- /* schauen, ob alle "ubergeordneten Klassen schon fertig sind,
- und richtiges Initialisieren der lokalen Variablen */
+ /* check interfaces */
- for ( i=0; i<c->interfacescount; i++) {
+ for (i = 0; i < c->interfacescount; i++) {
ic = c->interfaces[i];
- if ( !ic -> linked) {
- list_remove (&unlinkedclasses,c );
- list_addlast (&unlinkedclasses,c );
+ if (!ic->linked) {
+ list_remove(&unlinkedclasses, c);
+ list_addlast(&unlinkedclasses, c);
return;
}
}
- if (! super) {
- c -> index = 0;
- c -> instancesize = sizeof (java_objectheader);
+ /* check super class */
+
+ if (super == NULL) { /* class java.long.Object */
+ c->index = 0;
+ c->instancesize = sizeof(java_objectheader);
vftbllength = supervftbllength = 0;
- c -> finalizer = NULL;
+ c->finalizer = NULL;
}
else {
- if ( !super -> linked ) {
- list_remove (&unlinkedclasses,c );
- list_addlast (&unlinkedclasses,c );
+ if (!super->linked) {
+ list_remove(&unlinkedclasses, c);
+ list_addlast(&unlinkedclasses, c);
return;
}
- if ( c->flags & ACC_INTERFACE) c -> index = interfaceindex++;
- else c -> index = super -> index + 1;
+ if (c->flags & ACC_INTERFACE)
+ c->index = interfaceindex++;
+ else
+ c->index = super->index + 1;
- c -> instancesize = super -> instancesize;
+ c->instancesize = super->instancesize;
- vftbllength = supervftbllength = super -> vftbl -> vftbllength;
+ vftbllength = supervftbllength = super->vftbl->vftbllength;
- c -> finalizer = super -> finalizer;
+ c->finalizer = super->finalizer;
}
if (linkverbose) {
sprintf (logtext, "Linking Class: ");
- unicode_sprint (logtext+strlen(logtext), c->name );
+ utf_sprint (logtext+strlen(logtext), c->name );
dolog ();
}
- /* Erstellen der Virtual Function Table */
+ /* compute vftbl length */
- for (i=0; i < c->methodscount; i++) {
+ for (i = 0; i < c->methodscount; i++) {
methodinfo *m = &(c->methods[i]);
- if (! (m->flags & ACC_STATIC) ) {
+ if (!(m->flags & ACC_STATIC)) { /* is instance method */
classinfo *sc = super;
while (sc) {
int j;
- for (j=0; j < sc->methodscount; j++) {
- if ( method_canoverwrite (m, &(sc->methods[j])) ) {
- m -> vftblindex = sc->methods[j].vftblindex;
+ for (j = 0; j < sc->methodscount; j++) {
+ if (method_canoverwrite(m, &(sc->methods[j]))) {
+ m->vftblindex = sc->methods[j].vftblindex;
goto foundvftblindex;
}
}
sc = sc->super;
}
- m -> vftblindex = (vftbllength++);
- foundvftblindex: ;
+ m->vftblindex = (vftbllength++);
+foundvftblindex: ;
}
}
count_vftbl_len += sizeof(vftbl) + sizeof(methodptr)*(vftbllength-1);
#endif
- c -> vftbl = v = (vftbl*)
- mem_alloc (sizeof(vftbl) + sizeof(methodptr)*(vftbllength-1));
- v -> class = c;
- v -> vftbllength = vftbllength;
- v -> interfacetablelength = 0;
-
- for (i=0; i < supervftbllength; i++)
- v -> table[i] = super -> vftbl -> table[i];
+ /* compute interfacetable length */
+
+ interfacetablelength = 0;
+ c2 = c;
+ while (c2) {
+ for (i = 0; i < c2->interfacescount; i++) {
+ s4 h = class_highestinterface (c2->interfaces[i]) + 1;
+ if (h > interfacetablelength)
+ interfacetablelength = h;
+ }
+ c2 = c2->super;
+ }
+
+ /* allocate virtual function table */
+
+ v = (vftbl*) mem_alloc(sizeof(vftbl) + sizeof(methodptr) *
+ (vftbllength - 1) + sizeof(methodptr*) *
+ (interfacetablelength - (interfacetablelength > 0)));
+ v = (vftbl*) (((methodptr*) v) + (interfacetablelength - 1) *
+ (interfacetablelength > 1));
+ c->header.vftbl = c->vftbl = v;
+ v->class = c;
+ v->vftbllength = vftbllength;
+ v->interfacetablelength = interfacetablelength;
+
+ /* copy virtual function table of super class */
+
+ for (i = 0; i < supervftbllength; i++)
+ v->table[i] = super->vftbl->table[i];
- for (i=0; i < c->methodscount; i++) {
+ /* add method stubs into virtual function table */
+
+ for (i = 0; i < c->methodscount; i++) {
methodinfo *m = &(c->methods[i]);
- if ( ! (m->flags & ACC_STATIC) ) {
- v -> table[m->vftblindex] = m -> stubroutine;
+ if (!(m->flags & ACC_STATIC)) {
+ v->table[m->vftblindex] = m->stubroutine;
}
}
-
- /* Berechnen der Instanzengr"o"se und der Offsets der einzelnen
- Felder */
+ /* compute instance size and offset of each field */
- for (i=0; i < c->fieldscount; i++) {
- u4 dsize;
- fieldinfo *f = &(c -> fields[i]);
+ for (i = 0; i < c->fieldscount; i++) {
+ s4 dsize;
+ fieldinfo *f = &(c->fields[i]);
- if ( ! (f->flags & ACC_STATIC) ) {
+ if (!(f->flags & ACC_STATIC) ) {
dsize = desc_typesize (f->descriptor);
- c -> instancesize = ALIGN ( c->instancesize, dsize);
- f -> offset = c -> instancesize;
- c -> instancesize += dsize;
+ c->instancesize = ALIGN (c->instancesize, dsize);
+ f->offset = c->instancesize;
+ c->instancesize += dsize;
}
-
}
+ /* initialize interfacetable and interfacevftbllength */
- /* Berechnen der Virtual Function Tables f"ur alle Interfaces */
-
- c2 = c;
- while (c2) {
- for (i=0; i<c2->interfacescount; i++) {
- s4 h = class_highestinterface (c2->interfaces[i]) + 1;
- if ( h > v->interfacetablelength) v->interfacetablelength = h;
- }
- c2 = c2->super;
- }
- v -> interfacevftbllength = MNEW (u4, v->interfacetablelength);
- v -> interfacevftbl = MNEW (methodptr *, v->interfacetablelength);
+ v->interfacevftbllength = MNEW (s4, interfacetablelength);
#ifdef STATISTICS
- count_vftbl_len += (4 + sizeof(methodptr*)) * v->interfacetablelength;
+ count_vftbl_len += (4 + sizeof(s4)) * v->interfacetablelength;
#endif
- for (i=0; i < v->interfacetablelength; i++) {
- v -> interfacevftbllength[i] = 0;
- v -> interfacevftbl[i] = NULL;
+ for (i = 0; i < interfacetablelength; i++) {
+ v->interfacevftbllength[i] = 0;
+ v->interfacetable[-i] = NULL;
}
- c2 = c;
- while (c2) {
- for (i=0; i<c2->interfacescount; i++) {
+ /* add interfaces */
+
+ for (c2 = c; c2 != NULL; c2 = c2->super)
+ for (i = 0; i < c2->interfacescount; i++) {
class_addinterface (c, c2->interfaces[i]);
}
- c2 = c2->super;
- }
-
-
- /* Die finalizer-Methode suchen und eintragen (wenn vorhanden),
- aber nur bei Objekten ausser java.lang.Object */
+ /* add finalizer method (not for java.lang.Object) */
- if (super) {
+ if (super != NULL) {
methodinfo *fi;
- static unicode *finame=NULL,*fidesc=NULL;
-
- if (!finame) finame = unicode_new_char ("finalize");
- if (!fidesc) fidesc = unicode_new_char ("()V");
+ static utf *finame = NULL;
+ static utf *fidesc = NULL;
+
+ if (finame == NULL)
+ finame = utf_finalize;
+ if (fidesc == NULL)
+ fidesc = utf_fidesc;
fi = class_findmethod (c, finame, fidesc);
- if (fi) {
- if (! (fi->flags & ACC_STATIC) ) {
- c -> finalizer = fi;
+ if (fi != NULL) {
+ if (!(fi->flags & ACC_STATIC)) {
+ c->finalizer = fi;
}
}
- }
-
-
- /* Abschlie"sende Aktionen */
-
- c -> linked = true;
+ }
+
+ /* final tasks */
+
+ c->linked = true;
list_remove (&unlinkedclasses, c);
list_addlast (&linkedclasses, c);
}
-/******************* Funktion: class_freepool *********************************
+/******************* Function: class_freepool **********************************
- Gibt alle Resourcen, die der ConstantPool einer Klasse ben"otigt,
- wieder frei.
+ Frees all resources used by this classes Constant Pool.
-******************************************************************************/
+*******************************************************************************/
static void class_freecpool (classinfo *c)
{
}
-/*********************** Funktion: class_free *********************************
+/*********************** Function: class_free **********************************
- Gibt alle Resourcen, die eine ganze Klasse ben"otigt, frei
+ Frees all resources used by the class.
-******************************************************************************/
+*******************************************************************************/
static void class_free (classinfo *c)
{
- u4 i;
+ s4 i;
vftbl *v;
- unicode_unlinkclass (c->name);
-
class_freecpool (c);
MFREE (c->interfaces, classinfo*, c->interfacescount);
- for (i=0; i < c->fieldscount; i++) field_free ( &(c->fields[i]) );
+ for (i = 0; i < c->fieldscount; i++)
+ field_free(&(c->fields[i]));
MFREE (c->fields, fieldinfo, c->fieldscount);
- for (i=0; i < c->methodscount; i++) method_free ( &(c->methods[i]) );
+ for (i = 0; i < c->methodscount; i++)
+ method_free(&(c->methods[i]));
MFREE (c->methods, methodinfo, c->methodscount);
- if ( (v = c->vftbl) ) {
- for (i=0; i<v->interfacetablelength; i++) {
- MFREE (v->interfacevftbl[i], methodptr, v->interfacevftbllength[i]);
+ if ((v = c->vftbl) != NULL) {
+ for (i = 0; i < v->interfacetablelength; i++) {
+ MFREE (v->interfacetable[-i], methodptr, v->interfacevftbllength[i]);
}
- MFREE (v->interfacevftbllength, u4, v->interfacetablelength);
- MFREE (v->interfacevftbl, methodptr*, v->interfacetablelength);
-
- mem_free (v, sizeof(vftbl) + sizeof(methodptr) * (v->vftbllength - 1));
+ MFREE (v->interfacevftbllength, s4, v->interfacetablelength);
+
+ i = sizeof(vftbl) + sizeof(methodptr) * (v->vftbllength - 1) +
+ sizeof(methodptr*) * (v->interfacetablelength -
+ (v->interfacetablelength > 0));
+ v = (vftbl*) (((methodptr*) v) - (v->interfacetablelength - 1) *
+ (v->interfacetablelength > 1));
+ mem_free (v, i);
}
-
+
+ if (c->innerclasscount)
+ MFREE (c->innerclass, innerclassinfo, c->innerclasscount);
+
FREE (c, classinfo);
}
-
-/************************* Funktion: class_findfield *************************
+/************************* Function: class_findfield ***************************
- sucht in einer 'classinfo'-Struktur nach einem Feld mit gew"unschtem
- Namen und Typ.
+ Searches a 'classinfo' structure for a field having the given name and
+ type.
+
+*******************************************************************************/
-*****************************************************************************/
-fieldinfo *class_findfield (classinfo *c, unicode *name, unicode *desc)
+fieldinfo *class_findfield (classinfo *c, utf *name, utf *desc)
{
- u4 i;
- for (i=0; i < c->fieldscount; i++) {
- if ( (c->fields[i].name == name) && (c->fields[i].descriptor == desc) )
- return &(c->fields[i]);
- }
+ s4 i;
+
+ for (i = 0; i < c->fieldscount; i++) {
+ if ((c->fields[i].name == name) && (c->fields[i].descriptor == desc))
+ return &(c->fields[i]);
+ }
+
panic ("Can not find field given in CONSTANT_Fieldref");
return NULL;
}
-/************************* Funktion: class_findmethod *************************
+/************************* Function: class_findmethod **************************
- sucht in einer 'classinfo'-Struktur nach einer Methode mit gew"unschtem
- Namen und Typ.
- Wenn als Typ NULL angegeben wird, dann ist der Typ egal.
+ Searches a 'classinfo' structure for a method having the given name and
+ type.
+ If type is NULL, it is ignored.
-*****************************************************************************/
+*******************************************************************************/
-methodinfo *class_findmethod (classinfo *c, unicode *name, unicode *desc)
+methodinfo *class_findmethod (classinfo *c, utf *name, utf *desc)
{
- u4 i;
- for (i=0; i < c->methodscount; i++) {
- if ( (c->methods[i].name == name)
- && ( (desc == NULL)
- || (c->methods[i].descriptor == desc)
- )
- )
+ s4 i;
+ for (i = 0; i < c->methodscount; i++) {
+ if ((c->methods[i].name == name) && ((desc == NULL) ||
+ (c->methods[i].descriptor == desc)))
return &(c->methods[i]);
}
return NULL;
}
+/************************* Function: class_findmethod_approx ******************
+
+ like class_findmethod but ignores the return value when comparing the
+ descriptor.
+
+*******************************************************************************/
+
+methodinfo *class_findmethod_approx (classinfo *c, utf *name, utf *desc)
+{
+ s4 i;
+
+ for (i = 0; i < c->methodscount; i++)
+ if (c->methods[i].name == name) {
+ utf *meth_descr = c->methods[i].descriptor;
+
+ if (desc == NULL)
+ /* ignore type */
+ return &(c->methods[i]);
+
+ if (desc->blength <= meth_descr->blength) {
+ /* current position in utf text */
+ char *desc_utf_ptr = desc->text;
+ char *meth_utf_ptr = meth_descr->text;
+ /* points behind utf strings */
+ char *desc_end = utf_end(desc);
+ char *meth_end = utf_end(meth_descr);
+ char ch;
+
+ /* compare argument types */
+ while (desc_utf_ptr<desc_end && meth_utf_ptr<meth_end) {
+
+ if ((ch=*desc_utf_ptr++) != (*meth_utf_ptr++))
+ break; /* no match */
+
+ if (ch==')')
+ return &(c->methods[i]); /* all parameter types equal */
+ }
+ }
+ }
-/************************* Funktion: class_resolvemethod *************************
+ return NULL;
+}
+
+/***************** Function: class_resolvemethod_approx ***********************
- sucht eine Klasse und alle Superklassen ab, um eine Methode zu finden.
+ Searches a class and every super class for a method (without paying
+ attention to the return value)
-*****************************************************************************/
+*******************************************************************************/
+
+methodinfo *class_resolvemethod_approx (classinfo *c, utf *name, utf *desc)
+{
+ while (c) {
+ /* search for method (ignore returntype) */
+ methodinfo *m = class_findmethod_approx (c, name, desc);
+ /* method found */
+ if (m) return m;
+ /* search superclass */
+ c = c->super;
+ }
+ return NULL;
+}
+
+
+/************************* Function: class_resolvemethod ***********************
+
+ Searches a class and every super class for a method.
+
+*******************************************************************************/
-methodinfo *class_resolvemethod (classinfo *c, unicode *name, unicode *desc)
+methodinfo *class_resolvemethod (classinfo *c, utf *name, utf *desc)
{
while (c) {
methodinfo *m = class_findmethod (c, name, desc);
if (m) return m;
+ /* search superclass */
c = c->super;
}
return NULL;
-/************************* Funktion: class_issubclass ************************
+/************************* Function: class_issubclass **************************
- "uberpr"uft, ob eine Klasse von einer anderen Klasse abgeleitet ist.
+ Checks if sub is a descendant of super.
-*****************************************************************************/
+*******************************************************************************/
bool class_issubclass (classinfo *sub, classinfo *super)
{
-/****************** Initialisierungsfunktion f"ur eine Klasse ****************
+/****************** Initialization function for classes ******************
- In Java kann jede Klasse ein statische Initialisierungsfunktion haben.
- Diese Funktion mu"s aufgerufen werden, BEVOR irgendwelche Methoden der
- Klasse aufgerufen werden, oder auf statische Variablen zugegriffen
- wird.
+ In Java, every class can have a static initialization function. This
+ function has to be called BEFORE calling other methods or accessing static
+ variables.
-******************************************************************************/
+*******************************************************************************/
#ifdef USE_THREADS
extern int blockInts;
s4 i;
int b;
- if (!makeinitializations) return;
- if (c->initialized) return;
+ if (!makeinitializations)
+ return;
+ if (c->initialized)
+ return;
c -> initialized = true;
- if (c->super) class_init (c->super);
- for (i=0; i < c->interfacescount; i++) class_init(c->interfaces[i]);
+#ifdef STATISTICS
+ count_class_inits++;
+#endif
+
+ if (c->super)
+ class_init (c->super);
+ for (i=0; i < c->interfacescount; i++)
+ class_init(c->interfaces[i]);
- m = class_findmethod (c,
- unicode_new_char ("<clinit>"),
- unicode_new_char ("()V"));
+ m = class_findmethod (c, utf_clinit, utf_fidesc);
if (!m) {
if (initverbose) {
sprintf (logtext, "Class ");
- unicode_sprint (logtext+strlen(logtext), c->name);
- sprintf (logtext+strlen(logtext), " has no initializer");
+ utf_sprint (logtext+strlen(logtext), c->name);
+ sprintf (logtext+strlen(logtext), " has no initializer");
dolog ();
}
return;
}
- if (! (m->flags & ACC_STATIC)) panic ("Class initializer is not static!");
+ if (! (m->flags & ACC_STATIC))
+ panic ("Class initializer is not static!");
if (initverbose) {
sprintf (logtext, "Starting initializer for class: ");
- unicode_sprint (logtext+strlen(logtext), c->name);
+ utf_sprint (logtext+strlen(logtext), c->name);
dolog ();
}
blockInts = b;
#endif
- if (exceptionptr) {
- printf ("#### Initializer has thrown: ");
- unicode_display (exceptionptr->vftbl->class->name);
+ if (exceptionptr) {
+ printf ("#### Initializer of ");
+ utf_display (c->name);
+ printf (" has thrown: ");
+ utf_display (exceptionptr->vftbl->class->name);
printf ("\n");
fflush (stdout);
}
if (initverbose) {
sprintf (logtext, "Finished initializer for class: ");
- unicode_sprint (logtext+strlen(logtext), c->name);
+ utf_sprint (logtext+strlen(logtext), c->name);
dolog ();
}
+ if (c->name == utf_systemclass) {
+ /* class java.lang.System requires explicit initialization */
+
+ if (initverbose)
+ printf ("#### Initializing class System");
+
+ /* find initializing method */
+ m = class_findmethod (c,
+ utf_initsystemclass,
+ utf_fidesc);
+
+ if (!m) {
+ /* no method found */
+ log("initializeSystemClass failed");
+ return;
+ }
+
+ #ifdef USE_THREADS
+ b = blockInts;
+ blockInts = 0;
+ #endif
+
+ exceptionptr = asm_calljavamethod (m, NULL,NULL,NULL,NULL);
+
+ #ifdef USE_THREADS
+ assert(blockInts == 0);
+ blockInts = b;
+ #endif
+
+ if (exceptionptr) {
+ printf ("#### initializeSystemClass has thrown: ");
+ utf_display (exceptionptr->vftbl->class->name);
+ printf ("\n");
+ fflush (stdout);
+ }
+ }
}
-/********* Funktion: class_showconstantpool (nur f"ur Debug-Zwecke) ********/
+/********* Function: class_showconstantpool (debugging only) *********/
void class_showconstantpool (classinfo *c)
{
switch (c -> cptags [i]) {
case CONSTANT_Class:
printf ("Classreference -> ");
- unicode_display ( ((classinfo*)e) -> name );
+ utf_display ( ((classinfo*)e) -> name );
break;
case CONSTANT_Fieldref:
displayFMI:
{
constant_FMIref *fmi = e;
- unicode_display ( fmi->class->name );
+ utf_display ( fmi->class->name );
printf (".");
- unicode_display ( fmi->name);
+ utf_display ( fmi->name);
printf (" ");
- unicode_display ( fmi->descriptor );
+ utf_display ( fmi->descriptor );
}
break;
case CONSTANT_String:
printf ("String -> ");
- unicode_display (e);
+ utf_display (e);
break;
case CONSTANT_Integer:
printf ("Integer -> %d", (int) ( ((constant_integer*)e) -> value) );
case CONSTANT_NameAndType:
{ constant_nameandtype *cnt = e;
printf ("NameAndType: ");
- unicode_display (cnt->name);
+ utf_display (cnt->name);
printf (" ");
- unicode_display (cnt->descriptor);
+ utf_display (cnt->descriptor);
}
break;
case CONSTANT_Utf8:
printf ("Utf8 -> ");
- unicode_display (e);
+ utf_display (e);
break;
case CONSTANT_Arraydescriptor: {
printf ("Arraydescriptor: ");
-/********** Funktion: class_showmethods (nur f"ur Debug-Zwecke) ************/
+/********** Function: class_showmethods (debugging only) *************/
void class_showmethods (classinfo *c)
{
- u4 i;
+ s4 i;
printf ("--------- Fields and Methods ----------------\n");
printf ("Flags: "); printflags (c->flags); printf ("\n");
- printf ("This: "); unicode_display (c->name); printf ("\n");
+ printf ("This: "); utf_display (c->name); printf ("\n");
if (c->super) {
- printf ("Super: "); unicode_display (c->super->name); printf ("\n");
+ printf ("Super: "); utf_display (c->super->name); printf ("\n");
}
printf ("Index: %d\n", c->index);
printf ("interfaces:\n");
for (i=0; i < c-> interfacescount; i++) {
printf (" ");
- unicode_display (c -> interfaces[i] -> name);
+ utf_display (c -> interfaces[i] -> name);
printf (" (%d)\n", c->interfaces[i] -> index);
}
-/*****************************************************************************/
-/******************* Funktionen fuer den Class-loader generell ***************/
-/*****************************************************************************/
+/******************************************************************************/
+/******************* General functions for the class loader *******************/
+/******************************************************************************/
+static int loader_inited = 0;
-/********************* Funktion: loader_load **********************************
+/********************* Function: loader_load ***********************************
- l"adt und linkt die ge"unschte Klasse und alle davon
- referenzierten Klassen und Interfaces
- Return: Einen Zeiger auf diese Klasse
+ Loads and links the class desired class and each class and interface
+ referenced by it.
+ Returns: a pointer to this class
-******************************************************************************/
+*******************************************************************************/
-classinfo *loader_load (unicode *topname)
+classinfo *loader_load (utf *topname)
{
classinfo *top;
classinfo *c;
intsDisable(); /* schani */
- if (getloadingtime) starttime = getcputime();
+ if (getloadingtime)
+ starttime = getcputime();
- top = class_get (topname);
+ top = class_new (topname);
+ /* load classes */
while ( (c = list_first(&unloadedclasses)) ) {
- class_load (c);
- }
+ if (!class_load (c)) {
+ list_remove (&unloadedclasses, c);
+ top=NULL;
+ }
+ }
+ /* link classes */
while ( (c = list_first(&unlinkedclasses)) ) {
class_link (c);
}
+ if (loader_inited)
+ loader_compute_subclasses();
+
+ /* measure time */
if (getloadingtime) {
stoptime = getcputime();
loadingtime += (stoptime-starttime);
intsRestore(); /* schani */
- return top;
+ return top;
}
-/******************* interne Funktion: loader_createarrayclass ****************
+/**************** function: create_primitive_classes ***************************
- Erzeugt (und linkt) eine Klasse f"ur die Arrays.
-
-******************************************************************************/
+ create classes representing primitive types
-static classinfo *loader_createarrayclass ()
-{
- classinfo *c;
- c = class_get ( unicode_new_char ("The_Array_Class") );
-
+********************************************************************************/
+
+
+void create_primitive_classes()
+{
+ int i;
+
+ for (i=0;i<PRIMITIVETYPE_COUNT;i++) {
+ /* create primitive class */
+ classinfo *c = class_new ( utf_new_char(primitivetype_table[i].name) );
+
+ /* prevent loader from loading primitive class */
+ list_remove (&unloadedclasses, c);
+ /* add to unlinked classes */
+ list_addlast (&unlinkedclasses, c);
+ c -> super = class_java_lang_Object;
+ class_link (c);
+
+ primitivetype_table[i].class_primitive = c;
+
+ /* create class for wrapping the primitive type */
+ primitivetype_table[i].class_wrap =
+ class_new( utf_new_char(primitivetype_table[i].wrapname) );
+ }
+}
+
+/***************** function: create_array_class ********************************
+
+ create class representing an array
+
+********************************************************************************/
+
+
+classinfo *create_array_class(utf *u)
+{
+ classinfo *c = class_new (u);
+ /* prevent loader from loading the array class */
list_remove (&unloadedclasses, c);
+ /* add to unlinked classes */
list_addlast (&unlinkedclasses, c);
c -> super = class_java_lang_Object;
-
- class_link (c);
+ class_link(c);
+
return c;
}
+/********************** Function: loader_init **********************************
+ Initializes all lists and loads all classes required for the system or the
+ compiler.
-/********************** Funktion: loader_init *********************************
-
- Initialisiert alle Listen und l"adt alle Klassen, die vom System
- und vom Compiler direkt ben"otigt werden.
-
-******************************************************************************/
+*******************************************************************************/
void loader_init ()
{
+ utf *string_class;
interfaceindex = 0;
list_init (&unloadedclasses, OFFSET(classinfo, listnode) );
list_init (&unlinkedclasses, OFFSET(classinfo, listnode) );
list_init (&linkedclasses, OFFSET(classinfo, listnode) );
+ /* create utf-symbols for pointer comparison of frequently used strings */
+ utf_innerclasses = utf_new_char("InnerClasses");
+ utf_constantvalue = utf_new_char("ConstantValue");
+ utf_code = utf_new_char("Code");
+ utf_finalize = utf_new_char("finalize");
+ utf_fidesc = utf_new_char("()V");
+ utf_clinit = utf_new_char("<clinit>");
+ utf_initsystemclass = utf_new_char("initializeSystemClass");
+ utf_systemclass = utf_new_char("java/lang/System");
+
+ /* create class for arrays */
+ class_array = class_new ( utf_new_char ("The_Array_Class") );
+ list_remove (&unloadedclasses, class_array);
+
+ /* create class for strings, load it after class Object was loaded */
+ string_class = utf_new_char ("java/lang/String");
+ class_java_lang_String = class_new(string_class);
+ list_remove (&unloadedclasses, class_java_lang_String);
class_java_lang_Object =
- loader_load ( unicode_new_char ("java/lang/Object") );
+ loader_load ( utf_new_char ("java/lang/Object") );
+
+ list_addlast(&unloadedclasses, class_java_lang_String);
+
class_java_lang_String =
- loader_load ( unicode_new_char ("java/lang/String") );
+ loader_load ( string_class );
class_java_lang_ClassCastException =
- loader_load ( unicode_new_char ("java/lang/ClassCastException") );
+ loader_load ( utf_new_char ("java/lang/ClassCastException") );
class_java_lang_NullPointerException =
- loader_load ( unicode_new_char ("java/lang/NullPointerException") );
+ loader_load ( utf_new_char ("java/lang/NullPointerException") );
class_java_lang_ArrayIndexOutOfBoundsException = loader_load (
- unicode_new_char ("java/lang/ArrayIndexOutOfBoundsException") );
+ utf_new_char ("java/lang/ArrayIndexOutOfBoundsException") );
class_java_lang_NegativeArraySizeException = loader_load (
- unicode_new_char ("java/lang/NegativeArraySizeException") );
+ utf_new_char ("java/lang/NegativeArraySizeException") );
class_java_lang_OutOfMemoryError = loader_load (
- unicode_new_char ("java/lang/OutOfMemoryError") );
+ utf_new_char ("java/lang/OutOfMemoryError") );
class_java_lang_ArrayStoreException =
- loader_load ( unicode_new_char ("java/lang/ArrayStoreException") );
+ loader_load ( utf_new_char ("java/lang/ArrayStoreException") );
class_java_lang_ArithmeticException =
- loader_load ( unicode_new_char ("java/lang/ArithmeticException") );
+ loader_load ( utf_new_char ("java/lang/ArithmeticException") );
class_java_lang_ThreadDeath = /* schani */
- loader_load ( unicode_new_char ("java/lang/ThreadDeath") );
+ loader_load ( utf_new_char ("java/lang/ThreadDeath") );
- class_array = loader_createarrayclass ();
+ /* link class for arrays */
+ list_addlast (&unlinkedclasses, class_array);
+ class_array -> super = class_java_lang_Object;
+ class_link (class_array);
+ /* correct vftbl-entries (retarded loading of class java/lang/String) */
+ stringtable_update();
+ /* create classes representing primitive types */
+ create_primitive_classes();
+
proto_java_lang_ClassCastException =
builtin_new(class_java_lang_ClassCastException);
heap_addreference ( (void**) &proto_java_lang_ClassCastException);
proto_java_lang_ThreadDeath = /* schani */
builtin_new(class_java_lang_ThreadDeath);
heap_addreference ( (void**) &proto_java_lang_ThreadDeath);
+
+ loader_inited = 1;
}
-/********************* Funktion: loader_initclasses ****************************
+/********************* Function: loader_initclasses ****************************
- initialisiert alle geladenen aber noch nicht initialisierten Klassen
+ Initializes all loaded but uninitialized classes
-******************************************************************************/
+*******************************************************************************/
void loader_initclasses ()
{
intsRestore(); /* schani */
}
-static s4 classvalue = 0;
+static s4 classvalue;
static void loader_compute_class_values (classinfo *c)
{
classinfo *subs;
- c->vftbl->lowclassval = classvalue++;
+ c->vftbl->baseval = ++classvalue;
subs = c->sub;
while (subs != NULL) {
loader_compute_class_values(subs);
subs = subs->nextsub;
}
- c->vftbl->highclassval = classvalue++;
+ c->vftbl->diffval = classvalue - c->vftbl->baseval;
/*
{
int i;
for (i = 0; i < c->index; i++)
printf(" ");
- printf("%3d %3d ", (int) c->vftbl->lowclassval, (int) c->vftbl->highclassval);
- unicode_display(c->name);
+ printf("%3d %3d ", (int) c->vftbl->baseval, c->vftbl->diffval);
+ utf_display(c->name);
printf("\n");
}
*/
intsDisable(); /* schani */
+ c = list_first (&linkedclasses);
+ while (c) {
+ if (!(c->flags & ACC_INTERFACE)) {
+ c->nextsub = 0;
+ c->sub = 0;
+ }
+ c = list_next (&linkedclasses, c);
+ }
+
c = list_first (&linkedclasses);
while (c) {
if (!(c->flags & ACC_INTERFACE) && (c->super != NULL)) {
c = list_next (&linkedclasses, c);
}
+ classvalue = 0;
loader_compute_class_values(class_java_lang_Object);
intsRestore(); /* schani */
-/******************** Funktion: loader_close **********************************
+/******************** function classloader_buffer ******************************
+
+ sets buffer for reading classdata
+
+*******************************************************************************/
+
+void classload_buffer(u1 *buf, int len)
+{
+ classbuffer = buf;
+ classbuffer_size = len;
+ classbuf_pos = buf - 1;
+}
- gibt alle Resourcen wieder frei
+
+/******************** Function: loader_close ***********************************
+
+ Frees all resources
-******************************************************************************/
+*******************************************************************************/
void loader_close ()
{
}
}
+
+/*
+ * These are local overrides for various environment variables in Emacs.
+ * Please do not remove this and leave it at the end of the file, where
+ * Emacs will automagically detect them.
+ * ---------------------------------------------------------------------
+ * Local variables:
+ * mode: c
+ * indent-tabs-mode: t
+ * c-basic-offset: 4
+ * tab-width: 4
+ * End:
+ */
+
projects / cacao.git / blobdiff