--- /dev/null
- topc->vftbl->subtype_overflow = malloc(sizeof(void*) * (i+1));
+/* src/vm/linker.c - class linker functions
+
+ Copyright (C) 1996-2005, 2006, 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
+
+ This file is part of CACAO.
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+
+*/
+
+
+#include "config.h"
+
+#include <assert.h>
+#include <stdint.h>
+
+#include "vm/types.h"
+
+#include "mm/memory.h"
+
+#include "native/native.hpp"
+
+#include "threads/lock.hpp"
+#include "threads/mutex.hpp"
+
+#include "toolbox/logging.h"
+
+#include "vm/access.hpp"
+#include "vm/array.hpp"
+#include "vm/class.hpp"
+#include "vm/classcache.hpp"
+#include "vm/exceptions.hpp"
+#include "vm/globals.hpp"
+#include "vm/loader.hpp"
+#include "vm/options.h"
+#include "vm/primitive.hpp"
+#include "vm/rt-timing.h"
+#include "vm/string.hpp"
+#include "vm/vm.hpp"
+
+#include "vm/jit/asmpart.h"
+#include "vm/jit/stubs.hpp"
+
+
+/* debugging macros ***********************************************************/
+
+#if !defined(NDEBUG)
+# define TRACELINKCLASS(c) \
+ do { \
+ if (opt_TraceLinkClass) { \
+ log_start(); \
+ log_print("[Linking "); \
+ class_print((c)); \
+ log_print("]"); \
+ log_finish(); \
+ } \
+ } while (0)
+#else
+# define TRACELINKCLASS(c)
+#endif
+
+
+/* #include "vm/resolve.hpp" */
+/* copied prototype to avoid bootstrapping problem: */
+classinfo *resolve_classref_or_classinfo_eager(classref_or_classinfo cls, bool checkaccess);
+
+#if defined(ENABLE_STATISTICS)
+# include "vm/statistics.h"
+#endif
+
+#if !defined(NDEBUG) && defined(ENABLE_INLINING)
+#define INLINELOG(code) do { if (opt_TraceInlining) { code } } while (0)
+#else
+#define INLINELOG(code)
+#endif
+
+
+/* global variables ***********************************************************/
+
+static s4 interfaceindex; /* sequential numbering of interfaces */
+static s4 classvalue;
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/* private functions **********************************************************/
+
+static classinfo *link_class_intern(classinfo *c);
+static arraydescriptor *link_array(classinfo *c);
+static void linker_compute_class_values(classinfo *c);
+static void linker_compute_subclasses(classinfo *c);
+static bool linker_addinterface(classinfo *c, classinfo *ic);
+static s4 class_highestinterface(classinfo *c);
+
+
+/* linker_init *****************************************************************
+
+ Initializes the linker subsystem and links classes required for the
+ primitive table.
+
+*******************************************************************************/
+
+void linker_preinit(void)
+{
+ TRACESUBSYSTEMINITIALIZATION("linker_preinit");
+
+ /* Reset interface index. */
+
+ interfaceindex = 0;
+
+ /* Link the most basic classes. */
+
+ if (!link_class(class_java_lang_Object))
+ vm_abort("linker_preinit: linking java/lang/Object failed");
+
+#if defined(ENABLE_JAVASE)
+ if (!link_class(class_java_lang_Cloneable))
+ vm_abort("linker_preinit: linking java/lang/Cloneable failed");
+
+ if (!link_class(class_java_io_Serializable))
+ vm_abort("linker_preinit: linking java/io/Serializable failed");
+#endif
+}
+
+
+/* linker_init *****************************************************************
+
+ Links all classes required in the VM.
+
+*******************************************************************************/
+
+void linker_init(void)
+{
+ TRACESUBSYSTEMINITIALIZATION("linker_init");
+
+ /* Link java.lang.Class as first class of the system, because we
+ need it's vftbl for all other classes so we can use a class as
+ object. */
+
+ if (!link_class(class_java_lang_Class))
+ vm_abort("linker_init: linking java/lang/Class failed");
+
+ /* Now set the header.vftbl of all classes which were created
+ before java.lang.Class was linked. */
+
+ class_postset_header_vftbl();
+
+ /* Link primitive-type wrapping classes. */
+
+#if defined(ENABLE_JAVASE)
+ if (!link_class(class_java_lang_Void))
+ vm_abort("linker_init: linking failed");
+#endif
+
+ if (!link_class(class_java_lang_Boolean))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_Byte))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_Character))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_Short))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_Integer))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_Long))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_Float))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_Double))
+ vm_abort("linker_init: linking failed");
+
+ /* Link important system classes. */
+
+ if (!link_class(class_java_lang_String))
+ vm_abort("linker_init: linking java/lang/String failed");
+
+#if defined(ENABLE_JAVASE)
+ if (!link_class(class_java_lang_ClassLoader))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_SecurityManager))
+ vm_abort("linker_init: linking failed");
+#endif
+
+ if (!link_class(class_java_lang_System))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_Thread))
+ vm_abort("linker_init: linking failed");
+
+#if defined(ENABLE_JAVASE)
+ if (!link_class(class_java_lang_ThreadGroup))
+ vm_abort("linker_init: linking failed");
+#endif
+
+ if (!link_class(class_java_lang_Throwable))
+ vm_abort("linker_init: linking failed");
+
+#if defined(WITH_JAVA_RUNTIME_LIBRARY_GNU_CLASSPATH)
+ if (!link_class(class_java_lang_VMSystem))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_VMThread))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_VMThrowable))
+ vm_abort("linker_init: linking failed");
+#endif
+
+ /* Important system exceptions. */
+
+ if (!link_class(class_java_lang_Exception))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_ClassNotFoundException))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_RuntimeException))
+ vm_abort("linker_init: linking failed");
+
+ /* some classes which may be used more often */
+
+#if defined(ENABLE_JAVASE)
+ if (!link_class(class_java_lang_StackTraceElement))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_reflect_Constructor))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_reflect_Field))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_reflect_Method))
+ vm_abort("linker_init: linking failed");
+
+# if defined(WITH_JAVA_RUNTIME_LIBRARY_GNU_CLASSPATH)
+ if (!link_class(class_java_lang_reflect_VMConstructor))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_reflect_VMField))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_lang_reflect_VMMethod))
+ vm_abort("linker_init: linking failed");
+# endif
+
+ if (!link_class(class_java_security_PrivilegedAction))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_util_Vector))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_java_util_HashMap))
+ vm_abort("linker_init: linking failed");
+
+# if defined(WITH_JAVA_RUNTIME_LIBRARY_OPENJDK)
+ if (!link_class(class_sun_misc_Signal))
+ vm_abort("linker_init: linking failed");
+
+ if (!link_class(class_sun_reflect_MagicAccessorImpl))
+ vm_abort("linker_init: linking failed");
+# endif
+
+ if (!link_class(arrayclass_java_lang_Object))
+ vm_abort("linker_init: linking failed");
+#endif
+
+
+ /* create pseudo classes used by the typechecker */
+
+ /* pseudo class for Arraystubs (extends java.lang.Object) */
+
+ pseudo_class_Arraystub =
+ class_create_classinfo(utf_new_char("$ARRAYSTUB$"));
+ pseudo_class_Arraystub->state |= CLASS_LOADED;
+ pseudo_class_Arraystub->super = class_java_lang_Object;
+
+#if defined(ENABLE_JAVASE)
+
+ pseudo_class_Arraystub->interfacescount = 2;
+ pseudo_class_Arraystub->interfaces = MNEW(classinfo*, 2);
+ pseudo_class_Arraystub->interfaces[0] = class_java_lang_Cloneable;
+ pseudo_class_Arraystub->interfaces[1] = class_java_io_Serializable;
+
+#elif defined(ENABLE_JAVAME_CLDC1_1)
+
+ pseudo_class_Arraystub->interfacescount = 0;
+ pseudo_class_Arraystub->interfaces = NULL;
+
+#else
+# error unknown Java configuration
+#endif
+
+ if (!classcache_store_unique(pseudo_class_Arraystub))
+ vm_abort("linker_init: could not cache pseudo_class_Arraystub");
+
+ if (!link_class(pseudo_class_Arraystub))
+ vm_abort("linker_init: linking pseudo_class_Arraystub failed");
+
+ /* pseudo class representing the null type */
+
+ pseudo_class_Null = class_create_classinfo(utf_new_char("$NULL$"));
+ pseudo_class_Null->state |= CLASS_LOADED;
+ pseudo_class_Null->super = class_java_lang_Object;
+
+ if (!classcache_store_unique(pseudo_class_Null))
+ vm_abort("linker_init: could not cache pseudo_class_Null");
+
+ if (!link_class(pseudo_class_Null))
+ vm_abort("linker_init: linking failed");
+
+ /* pseudo class representing new uninitialized objects */
+
+ pseudo_class_New = class_create_classinfo(utf_new_char("$NEW$"));
+ pseudo_class_New->state |= CLASS_LOADED;
+ pseudo_class_New->state |= CLASS_LINKED; /* XXX is this allright? */
+ pseudo_class_New->super = class_java_lang_Object;
+
+ if (!classcache_store_unique(pseudo_class_New))
+ vm_abort("linker_init: could not cache pseudo_class_New");
+
+ /* Correct vftbl-entries (retarded loading and linking of class
+ java/lang/String). */
+
+ stringtable_update();
+}
+
+
+/* link_class ******************************************************************
+
+ Wrapper function for link_class_intern to ease monitor enter/exit
+ and exception handling.
+
+*******************************************************************************/
+
+classinfo *link_class(classinfo *c)
+{
+ classinfo *r;
+#if defined(ENABLE_RT_TIMING)
+ struct timespec time_start, time_end;
+#endif
+
+ RT_TIMING_GET_TIME(time_start);
+
+ if (c == NULL) {
+ exceptions_throw_nullpointerexception();
+ return NULL;
+ }
+
+ LOCK_MONITOR_ENTER(c);
+
+ /* Maybe the class is currently linking or is already linked.*/
+
+ if ((c->state & CLASS_LINKING) || (c->state & CLASS_LINKED)) {
+ LOCK_MONITOR_EXIT(c);
+
+ return c;
+ }
+
+#if defined(ENABLE_STATISTICS)
+ /* measure time */
+
+ if (opt_getcompilingtime)
+ compilingtime_stop();
+
+ if (opt_getloadingtime)
+ loadingtime_start();
+#endif
+
+ /* call the internal function */
+
+ r = link_class_intern(c);
+
+ /* If return value is NULL, we had a problem and the class is not
+ linked. */
+
+ if (r == NULL)
+ c->state &= ~CLASS_LINKING;
+
+#if defined(ENABLE_STATISTICS)
+ /* measure time */
+
+ if (opt_getloadingtime)
+ loadingtime_stop();
+
+ if (opt_getcompilingtime)
+ compilingtime_start();
+#endif
+
+ LOCK_MONITOR_EXIT(c);
+
+ RT_TIMING_GET_TIME(time_end);
+
+ RT_TIMING_TIME_DIFF(time_start,time_end,RT_TIMING_LINK_TOTAL);
+
+ return r;
+}
+
+
+/* linker_overwrite_method *****************************************************
+
+ Overwrite a method with another one, update method flags and check
+ assumptions.
+
+ IN:
+ mg................the general method being overwritten
+ ms................the overwriting (more specialized) method
+ wl................worklist where to add invalidated methods
+
+ RETURN VALUE:
+ true..............everything ok
+ false.............an exception has been thrown
+
+*******************************************************************************/
+
+static bool linker_overwrite_method(methodinfo *mg,
+ methodinfo *ms,
+ method_worklist **wl)
+{
+ classinfo *cg;
+ classinfo *cs;
+
+ cg = mg->clazz;
+ cs = ms->clazz;
+
+ /* overriding a final method is illegal */
+
+ if (mg->flags & ACC_FINAL) {
+ exceptions_throw_verifyerror(mg, "Overriding final method");
+ return false;
+ }
+
+ /* method ms overwrites method mg */
+
+#if defined(ENABLE_VERIFIER)
+ /* Add loading constraints (for the more general types of method mg). */
+ /* Not for <init>, as it is not invoked virtually. */
+
+ if ((ms->name != utf_init)
+ && !classcache_add_constraints_for_params(
+ cs->classloader, cg->classloader, mg))
+ {
+ return false;
+ }
+#endif
+
+ /* inherit the vftbl index, and record the overwriting */
+
+ ms->vftblindex = mg->vftblindex;
+ ms->overwrites = mg;
+
+ /* update flags and check assumptions */
+ /* <init> methods are a special case, as they are never dispatched dynamically */
+
+ if ((ms->flags & ACC_METHOD_IMPLEMENTED) && ms->name != utf_init) {
+ do {
+
+#if defined(ENABLE_TLH)
+ if (mg->flags & ACC_METHOD_MONOMORPHY_USED) {
+ printf("%s/%s is evil! the siner is %s/%s\n", mg->clazz->name->text, mg->name->text,
+ ms->clazz->name->text, ms->name->text);
+ ms->flags |= ACC_METHOD_PARENT_MONOMORPHY_USED;
+ }
+#endif
+
+ if (mg->flags & ACC_METHOD_IMPLEMENTED) {
+ /* this adds another implementation */
+
+ mg->flags &= ~ACC_METHOD_MONOMORPHIC;
+
+ INLINELOG( printf("becomes polymorphic: "); method_println(mg); );
+
+ method_break_assumption_monomorphic(mg, wl);
+ }
+ else {
+ /* this is the first implementation */
+
+ mg->flags |= ACC_METHOD_IMPLEMENTED;
+
+ INLINELOG( printf("becomes implemented: "); method_println(mg); );
+ }
+
+ ms = mg;
+ mg = mg->overwrites;
+ } while (mg != NULL);
+ }
+
+ return true;
+}
+
+
+/* link_class_intern ***********************************************************
+
+ Tries to link a class. The function calculates the length in bytes
+ that an instance of this class requires as well as the VTBL for
+ methods and interface methods.
+
+*******************************************************************************/
+
+static int build_display_inner(classinfo *topc, classinfo *c, int i)
+{
+ int depth;
+ if (!c)
+ return 0;
+ do {
+ if (c->vftbl->arraydesc)
+ {
+ arraydescriptor *a = c->vftbl->arraydesc;
+ if (a->elementvftbl && a->elementvftbl->clazz->super)
+ {
+ classinfo *cls = a->elementvftbl->clazz->super;
+ int n;
+ for (n=0; n<a->dimension; n++)
+ cls = class_array_of(cls, true);
+ depth = build_display_inner(topc, cls, i+1);
+ break;
+ }
+ if (a->componentvftbl && a->elementvftbl)
+ {
+ depth = build_display_inner(topc, a->componentvftbl->clazz, i+1);
+ break;
+ }
+ }
+ depth = build_display_inner(topc, c->super, i+1);
+ } while (false);
+ if (depth >= DISPLAY_SIZE)
+ {
+ if (depth == DISPLAY_SIZE)
+ {
++ topc->vftbl->subtype_overflow = MNEW(vftbl_t *, i+1);
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ count_vftbl_len += sizeof(void*) * (i+1);
+#endif
+ }
+ topc->vftbl->subtype_overflow[depth - DISPLAY_SIZE] = c->vftbl;
+ return depth + 1;
+ }
+ topc->vftbl->subtype_display[depth] = c->vftbl;
+ return depth + 1;
+}
+
+static void build_display(classinfo *c)
+{
+ int depth;
+ int i;
+
+ depth = build_display_inner(c, c, 0) - 1;
+ c->vftbl->subtype_depth = depth;
+ if (depth >= DISPLAY_SIZE)
+ {
+ c->vftbl->subtype_offset = OFFSET(vftbl_t, subtype_display[DISPLAY_SIZE]);
+ }
+ else
+ {
+ c->vftbl->subtype_offset = OFFSET(vftbl_t, subtype_display[0]) + sizeof(void*) * depth;
+ for (i=depth+1; i<=DISPLAY_SIZE; i++)
+ c->vftbl->subtype_display[i] = NULL;
+ }
+}
+
+static classinfo *link_class_intern(classinfo *c)
+{
+ classinfo *super; /* super class */
+ classinfo *tc; /* temporary class variable */
+ s4 supervftbllength; /* vftbllegnth of super class */
+ s4 vftbllength; /* vftbllength of current class */
+ s4 interfacetablelength; /* interface table length */
+ vftbl_t *v; /* vftbl of current class */
+ s4 i; /* interface/method/field counter */
+ arraydescriptor *arraydesc; /* descriptor for array classes */
+ method_worklist *worklist; /* worklist for recompilation */
+#if defined(ENABLE_RT_TIMING)
+ struct timespec time_start, time_resolving, time_compute_vftbl,
+ time_abstract, time_compute_iftbl, time_fill_vftbl,
+ time_offsets, time_fill_iftbl, time_finalizer,
+ time_subclasses;
+#endif
+
+ RT_TIMING_GET_TIME(time_start);
+
+ TRACELINKCLASS(c);
+
+ /* the class must be loaded */
+
+ /* XXX should this be a specific exception? */
+ assert(c->state & CLASS_LOADED);
+
+ /* This is check in link_class. */
+
+ assert(!(c->state & CLASS_LINKED));
+
+ /* cache the self-reference of this class */
+ /* we do this for cases where the defining loader of the class */
+ /* has not yet been recorded as an initiating loader for the class */
+ /* this is needed so subsequent code can assume that self-refs */
+ /* will always resolve lazily */
+ /* No need to do it for the bootloader - it is always registered */
+ /* as initiating loader for the classes it loads. */
+ if (c->classloader)
+ classcache_store(c->classloader,c,false);
+
+ /* this class is currently linking */
+
+ c->state |= CLASS_LINKING;
+
+ arraydesc = NULL;
+ worklist = NULL;
+
+ /* Link the super interfaces. */
+
+ for (i = 0; i < c->interfacescount; i++) {
+ tc = c->interfaces[i];
+
+ if (!(tc->state & CLASS_LINKED))
+ if (!link_class(tc))
+ return NULL;
+ }
+
+ /* check super class */
+
+ super = NULL;
+
+ /* Check for java/lang/Object. */
+
+ if (c->super == NULL) {
+ c->index = 0;
+ c->instancesize = sizeof(java_object_t);
+
+ vftbllength = supervftbllength = 0;
+
+ c->finalizer = NULL;
+ }
+ else {
+ /* Get super class. */
+
+ super = c->super;
+
+ /* Link the super class if necessary. */
+
+ if (!(super->state & CLASS_LINKED))
+ if (!link_class(super))
+ return NULL;
+
+ /* OR the ACC_CLASS_HAS_POINTERS and the ACC_CLASS_REFERENCE_*
+ flags. */
+
+ c->flags |= (super->flags &
+ (ACC_CLASS_HAS_POINTERS | ACC_CLASS_REFERENCE_MASK));
+
+ /* handle array classes */
+
+ if (c->name->text[0] == '[')
+ if (!(arraydesc = link_array(c)))
+ return NULL;
+
+ if (c->flags & ACC_INTERFACE)
+ c->index = interfaceindex++;
+ else
+ c->index = super->index + 1;
+
+ c->instancesize = super->instancesize;
+
+ vftbllength = supervftbllength = super->vftbl->vftbllength;
+
+ c->finalizer = super->finalizer;
+ }
+ RT_TIMING_GET_TIME(time_resolving);
+
+
+ /* compute vftbl length */
+
+ for (i = 0; i < c->methodscount; i++) {
+ methodinfo *m = &(c->methods[i]);
+
+ if (!(m->flags & ACC_STATIC)) { /* is instance method */
+ tc = super;
+
+ while (tc) {
+ s4 j;
+
+ for (j = 0; j < tc->methodscount; j++) {
+ if (method_canoverwrite(m, &(tc->methods[j]))) {
+ if (tc->methods[j].flags & ACC_PRIVATE)
+ goto notfoundvftblindex;
+
+ /* package-private methods in other packages */
+ /* must not be overridden */
+ /* (see Java Language Specification 8.4.8.1) */
+ if ( !(tc->methods[j].flags & (ACC_PUBLIC | ACC_PROTECTED))
+ && !SAME_PACKAGE(c,tc) )
+ {
+ goto notfoundvftblindex;
+ }
+
+ if (!linker_overwrite_method(&(tc->methods[j]), m, &worklist))
+ return NULL;
+
+ goto foundvftblindex;
+ }
+ }
+
+ tc = tc->super;
+ }
+
+ notfoundvftblindex:
+ m->vftblindex = (vftbllength++);
+ foundvftblindex:
+ ;
+ }
+ }
+ RT_TIMING_GET_TIME(time_compute_vftbl);
+
+
+ /* Check all interfaces of an abstract class (maybe be an
+ interface too) for unimplemented methods. Such methods are
+ called miranda-methods and are marked with the ACC_MIRANDA
+ flag. VMClass.getDeclaredMethods does not return such
+ methods. */
+
+ if (c->flags & ACC_ABSTRACT) {
+ classinfo *ic;
+ methodinfo *im;
+ s4 abstractmethodscount;
+ s4 j;
+ s4 k;
+
+ abstractmethodscount = 0;
+
+ /* check all interfaces of the abstract class */
+
+ for (i = 0; i < c->interfacescount; i++) {
+ ic = c->interfaces[i];
+
+ for (j = 0; j < ic->methodscount; j++) {
+ im = &(ic->methods[j]);
+
+ /* skip `<clinit>' and `<init>' */
+
+ if ((im->name == utf_clinit) || (im->name == utf_init))
+ continue;
+
+ for (tc = c; tc != NULL; tc = tc->super) {
+ for (k = 0; k < tc->methodscount; k++) {
+ if (method_canoverwrite(im, &(tc->methods[k])))
+ goto noabstractmethod;
+ }
+ }
+
+ abstractmethodscount++;
+
+ noabstractmethod:
+ ;
+ }
+ }
+
+ if (abstractmethodscount > 0) {
+ methodinfo *am;
+
+ /* reallocate methods memory */
+
+ c->methods = (methodinfo*) MREALLOC(c->methods, methodinfo, c->methodscount,
+ c->methodscount + abstractmethodscount);
+
+ for (i = 0; i < c->interfacescount; i++) {
+ ic = c->interfaces[i];
+
+ for (j = 0; j < ic->methodscount; j++) {
+ im = &(ic->methods[j]);
+
+ /* skip `<clinit>' and `<init>' */
+
+ if ((im->name == utf_clinit) || (im->name == utf_init))
+ continue;
+
+ for (tc = c; tc != NULL; tc = tc->super) {
+ for (k = 0; k < tc->methodscount; k++) {
+ if (method_canoverwrite(im, &(tc->methods[k])))
+ goto noabstractmethod2;
+ }
+ }
+
+ /* Copy the method found into the new c->methods
+ array and tag it as miranda-method. */
+
+ am = &(c->methods[c->methodscount]);
+ c->methodscount++;
+
+ MCOPY(am, im, methodinfo, 1);
+
+ am->vftblindex = (vftbllength++);
+ am->clazz = c;
+ am->flags |= ACC_MIRANDA;
+
+ noabstractmethod2:
+ ;
+ }
+ }
+ }
+ }
+ RT_TIMING_GET_TIME(time_abstract);
+
+
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ count_vftbl_len +=
+ sizeof(vftbl_t) + (sizeof(methodptr) * (vftbllength - 1));
+#endif
+
+ /* compute interfacetable length */
+
+ interfacetablelength = 0;
+
+ for (tc = c; tc != NULL; tc = tc->super) {
+ for (i = 0; i < tc->interfacescount; i++) {
+ s4 h = class_highestinterface(tc->interfaces[i]) + 1;
+
+ if (h > interfacetablelength)
+ interfacetablelength = h;
+ }
+ }
+ RT_TIMING_GET_TIME(time_compute_iftbl);
+
+ /* allocate virtual function table */
+
+ v = (vftbl_t *) mem_alloc(sizeof(vftbl_t) +
+ sizeof(methodptr) * (vftbllength - 1) +
+ sizeof(methodptr*) * (interfacetablelength - (interfacetablelength > 0)));
+ v = (vftbl_t *) (((methodptr *) v) +
+ (interfacetablelength - 1) * (interfacetablelength > 1));
+
+ c->vftbl = v;
+ v->clazz = c;
+ v->vftbllength = vftbllength;
+ v->interfacetablelength = interfacetablelength;
+ v->arraydesc = arraydesc;
+
+ /* store interface index in vftbl */
+
+ if (c->flags & ACC_INTERFACE)
+ v->baseval = -(c->index);
+
+ /* copy virtual function table of super class */
+
+ for (i = 0; i < supervftbllength; i++)
+ v->table[i] = super->vftbl->table[i];
+
+ /* Fill the remaining vftbl slots with the AbstractMethodError
+ stub (all after the super class slots, because they are already
+ initialized). */
+
+ for (; i < vftbllength; i++) {
+#if defined(ENABLE_JIT)
+# if defined(ENABLE_INTRP)
+ if (opt_intrp)
+ v->table[i] = (methodptr) (ptrint) &intrp_asm_abstractmethoderror;
+ else
+# endif
+ v->table[i] = (methodptr) (ptrint) &asm_abstractmethoderror;
+#else
+ v->table[i] = (methodptr) (ptrint) &intrp_asm_abstractmethoderror;
+#endif
+ }
+
+ /* add method stubs into virtual function table */
+
+ for (i = 0; i < c->methodscount; i++) {
+ methodinfo *m = &(c->methods[i]);
+
+ assert(m->stubroutine == NULL);
+
+ /* Don't create a compiler stub for abstract methods as they
+ throw an AbstractMethodError with the default stub in the
+ vftbl. This entry is simply copied by sub-classes. */
+
+ if (m->flags & ACC_ABSTRACT)
+ continue;
+
+#if defined(ENABLE_JIT)
+# if defined(ENABLE_INTRP)
+ if (opt_intrp)
+ m->stubroutine = intrp_createcompilerstub(m);
+ else
+#endif
+ m->stubroutine = (u1*) CompilerStub::generate(m);
+#else
+ m->stubroutine = intrp_createcompilerstub(m);
+#endif
+
+ /* static methods are not in the vftbl */
+
+ if (m->flags & ACC_STATIC)
+ continue;
+
+ /* insert the stubroutine into the vftbl */
+
+ v->table[m->vftblindex] = (methodptr) (ptrint) m->stubroutine;
+ }
+ RT_TIMING_GET_TIME(time_fill_vftbl);
+
+ /* compute instance size and offset of each field */
+
+ for (i = 0; i < c->fieldscount; i++) {
+ s4 dsize;
+ fieldinfo *f = &(c->fields[i]);
+
+ if (!(f->flags & ACC_STATIC)) {
+ dsize = descriptor_typesize(f->parseddesc);
+ c->instancesize = MEMORY_ALIGN(c->instancesize, dsize);
+ f->offset = c->instancesize;
+ c->instancesize += dsize;
+ }
+ }
+ RT_TIMING_GET_TIME(time_offsets);
+
+ /* initialize interfacetable and interfacevftbllength */
+
+ v->interfacevftbllength = MNEW(s4, interfacetablelength);
+
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ count_vftbl_len += (4 + sizeof(s4)) * v->interfacetablelength;
+#endif
+
+ for (i = 0; i < interfacetablelength; i++) {
+ v->interfacevftbllength[i] = 0;
+ v->interfacetable[-i] = NULL;
+ }
+
+ /* add interfaces */
+
+ for (tc = c; tc != NULL; tc = tc->super)
+ for (i = 0; i < tc->interfacescount; i++)
+ if (!linker_addinterface(c, tc->interfaces[i]))
+ return NULL;
+
+ RT_TIMING_GET_TIME(time_fill_iftbl);
+
+ /* add finalizer method (not for java.lang.Object) */
+
+ if (super) {
+ methodinfo *fi;
+
+ fi = class_findmethod(c, utf_finalize, utf_void__void);
+
+ if (fi)
+ if (!(fi->flags & ACC_STATIC))
+ c->finalizer = fi;
+ }
+ RT_TIMING_GET_TIME(time_finalizer);
+
+ /* final tasks */
+
+ linker_compute_subclasses(c);
+
+ /* FIXME: this is completely useless now */
+ RT_TIMING_GET_TIME(time_subclasses);
+
+ build_display(c);
+
+ /* revert the linking state and class is linked */
+
+ c->state = (c->state & ~CLASS_LINKING) | CLASS_LINKED;
+
+ /* check worklist */
+
+ /* XXX must this also be done in case of exception? */
+
+ while (worklist != NULL) {
+ method_worklist *wi = worklist;
+
+ worklist = worklist->next;
+
+ INLINELOG( printf("MUST BE RECOMPILED: "); method_println(wi->m); );
+ jit_invalidate_code(wi->m);
+
+ /* XXX put worklist into dump memory? */
+ FREE(wi, method_worklist);
+ }
+
+ RT_TIMING_TIME_DIFF(time_start ,time_resolving ,RT_TIMING_LINK_RESOLVE);
+ RT_TIMING_TIME_DIFF(time_resolving ,time_compute_vftbl,RT_TIMING_LINK_C_VFTBL);
+ RT_TIMING_TIME_DIFF(time_compute_vftbl,time_abstract ,RT_TIMING_LINK_ABSTRACT);
+ RT_TIMING_TIME_DIFF(time_abstract ,time_compute_iftbl,RT_TIMING_LINK_C_IFTBL);
+ RT_TIMING_TIME_DIFF(time_compute_iftbl,time_fill_vftbl ,RT_TIMING_LINK_F_VFTBL);
+ RT_TIMING_TIME_DIFF(time_fill_vftbl ,time_offsets ,RT_TIMING_LINK_OFFSETS);
+ RT_TIMING_TIME_DIFF(time_offsets ,time_fill_iftbl ,RT_TIMING_LINK_F_IFTBL);
+ RT_TIMING_TIME_DIFF(time_fill_iftbl ,time_finalizer ,RT_TIMING_LINK_FINALIZER);
+ RT_TIMING_TIME_DIFF(time_finalizer ,time_subclasses ,RT_TIMING_LINK_SUBCLASS);
+
+ /* just return c to show that we didn't had a problem */
+
+ return c;
+}
+
+
+/* link_array ******************************************************************
+
+ This function is called by link_class to create the arraydescriptor
+ for an array class.
+
+ This function returns NULL if the array cannot be linked because
+ the component type has not been linked yet.
+
+*******************************************************************************/
+
+static arraydescriptor *link_array(classinfo *c)
+{
+ classinfo *comp;
+ s4 namelen;
+ arraydescriptor *desc;
+ vftbl_t *compvftbl;
+ utf *u;
+
+ comp = NULL;
+ namelen = c->name->blength;
+
+ /* Check the component type */
+
+ switch (c->name->text[1]) {
+ case '[':
+ /* c is an array of arrays. */
+ u = utf_new(c->name->text + 1, namelen - 1);
+ if (!(comp = load_class_from_classloader(u, c->classloader)))
+ return NULL;
+ break;
+
+ case 'L':
+ /* c is an array of objects. */
+ u = utf_new(c->name->text + 2, namelen - 3);
+ if (!(comp = load_class_from_classloader(u, c->classloader)))
+ return NULL;
+ break;
+ }
+
+ /* If the component type has not been linked, link it now */
+
+ assert(!comp || (comp->state & CLASS_LOADED));
+
+ if (comp && !(comp->state & CLASS_LINKED))
+ if (!link_class(comp))
+ return NULL;
+
+ /* Allocate the arraydescriptor */
+
+ desc = NEW(arraydescriptor);
+
+ if (comp) {
+ /* c is an array of references */
+ desc->arraytype = ARRAYTYPE_OBJECT;
+ desc->componentsize = sizeof(void*);
+ desc->dataoffset = OFFSET(java_objectarray_t, data);
+
+ compvftbl = comp->vftbl;
+
+ if (!compvftbl) {
+ log_text("Component class has no vftbl");
+ assert(0);
+ }
+
+ desc->componentvftbl = compvftbl;
+
+ if (compvftbl->arraydesc) {
+ desc->elementvftbl = compvftbl->arraydesc->elementvftbl;
+
+ if (compvftbl->arraydesc->dimension >= 255) {
+ log_text("Creating array of dimension >255");
+ assert(0);
+ }
+
+ desc->dimension = compvftbl->arraydesc->dimension + 1;
+ desc->elementtype = compvftbl->arraydesc->elementtype;
+
+ } else {
+ desc->elementvftbl = compvftbl;
+ desc->dimension = 1;
+ desc->elementtype = ARRAYTYPE_OBJECT;
+ }
+
+ } else {
+ /* c is an array of a primitive type */
+ switch (c->name->text[1]) {
+ case 'Z':
+ desc->arraytype = ARRAYTYPE_BOOLEAN;
+ desc->dataoffset = OFFSET(java_booleanarray_t,data);
+ desc->componentsize = sizeof(u1);
+ break;
+
+ case 'B':
+ desc->arraytype = ARRAYTYPE_BYTE;
+ desc->dataoffset = OFFSET(java_bytearray_t,data);
+ desc->componentsize = sizeof(u1);
+ break;
+
+ case 'C':
+ desc->arraytype = ARRAYTYPE_CHAR;
+ desc->dataoffset = OFFSET(java_chararray_t,data);
+ desc->componentsize = sizeof(u2);
+ break;
+
+ case 'D':
+ desc->arraytype = ARRAYTYPE_DOUBLE;
+ desc->dataoffset = OFFSET(java_doublearray_t,data);
+ desc->componentsize = sizeof(double);
+ break;
+
+ case 'F':
+ desc->arraytype = ARRAYTYPE_FLOAT;
+ desc->dataoffset = OFFSET(java_floatarray_t,data);
+ desc->componentsize = sizeof(float);
+ break;
+
+ case 'I':
+ desc->arraytype = ARRAYTYPE_INT;
+ desc->dataoffset = OFFSET(java_intarray_t,data);
+ desc->componentsize = sizeof(s4);
+ break;
+
+ case 'J':
+ desc->arraytype = ARRAYTYPE_LONG;
+ desc->dataoffset = OFFSET(java_longarray_t,data);
+ desc->componentsize = sizeof(s8);
+ break;
+
+ case 'S':
+ desc->arraytype = ARRAYTYPE_SHORT;
+ desc->dataoffset = OFFSET(java_shortarray_t,data);
+ desc->componentsize = sizeof(s2);
+ break;
+
+ default:
+ exceptions_throw_noclassdeffounderror(c->name);
+ return NULL;
+ }
+
+ desc->componentvftbl = NULL;
+ desc->elementvftbl = NULL;
+ desc->dimension = 1;
+ desc->elementtype = desc->arraytype;
+ }
+
+ return desc;
+}
+
+
+/* linker_compute_subclasses ***************************************************
+
+ XXX
+
+ ATTENTION: DO NOT REMOVE ANY OF THE LOCKING MECHANISMS BELOW:
+ This function needs to take the class renumber lock and stop the
+ world during class renumbering. The lock is used in C code which
+ is not that performance critical. Whereas JIT code uses critical
+ sections to atomically access the class values.
+
+*******************************************************************************/
+
+static void linker_compute_subclasses(classinfo *c)
+{
+
+ if (!(c->flags & ACC_INTERFACE)) {
+ c->nextsub = NULL;
+ c->sub = NULL;
+ c->vftbl->baseval = 1; /* so it does not look like an interface */
+ }
+
+ if (!(c->flags & ACC_INTERFACE) && (c->super != NULL)) {
+ c->nextsub = c->super->sub;
+ c->super->sub = c;
+ }
+
+ classvalue = 0;
+
+}
+
+
+/* linker_compute_class_values *************************************************
+
+ XXX
+
+*******************************************************************************/
+
+static void linker_compute_class_values(classinfo *c)
+{
+ classinfo *subs;
+
+ c->vftbl->baseval = ++classvalue;
+
+ subs = c->sub;
+
+ while (subs) {
+ linker_compute_class_values(subs);
+
+ subs = subs->nextsub;
+ }
+
+ c->vftbl->diffval = classvalue - c->vftbl->baseval;
+}
+
+
+/* linker_addinterface *********************************************************
+
+ Is needed by link_class for adding a VTBL to a class. All
+ interfaces implemented by ic are added as well.
+
+ RETURN VALUE:
+ true.........everything ok
+ false........an exception has been thrown
+
+*******************************************************************************/
+
+static bool linker_addinterface(classinfo *c, classinfo *ic)
+{
+ s4 j, k;
+ vftbl_t *v;
+ s4 i;
+ classinfo *sc;
+ methodinfo *m;
+
+ v = c->vftbl;
+ i = ic->index;
+
+ if (i >= v->interfacetablelength)
+ vm_abort("Internal error: interfacetable overflow");
+
+ /* if this interface has already been added, return immediately */
+
+ if (v->interfacetable[-i] != NULL)
+ return true;
+
+ if (ic->methodscount == 0) { /* fake entry needed for subtype test */
+ v->interfacevftbllength[i] = 1;
+ v->interfacetable[-i] = MNEW(methodptr, 1);
+ v->interfacetable[-i][0] = NULL;
+ }
+ else {
+ v->interfacevftbllength[i] = ic->methodscount;
+ v->interfacetable[-i] = MNEW(methodptr, ic->methodscount);
+
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ count_vftbl_len += sizeof(methodptr) *
+ (ic->methodscount + (ic->methodscount == 0));
+#endif
+
+ for (j = 0; j < ic->methodscount; j++) {
+ for (sc = c; sc != NULL; sc = sc->super) {
+ for (k = 0; k < sc->methodscount; k++) {
+ m = &(sc->methods[k]);
+
+ if (method_canoverwrite(m, &(ic->methods[j]))) {
+ /* method m overwrites the (abstract) method */
+#if defined(ENABLE_VERIFIER)
+ /* Add loading constraints (for the more
+ general types of the method
+ ic->methods[j]). */
+ if (!classcache_add_constraints_for_params(
+ c->classloader, ic->classloader,
+ &(ic->methods[j])))
+ {
+ return false;
+ }
+#endif
+
+ /* XXX taken from gcj */
+ /* check for ACC_STATIC: IncompatibleClassChangeError */
+
+ /* check for !ACC_PUBLIC: IllegalAccessError */
+
+ /* check for ACC_ABSTRACT: AbstracMethodError,
+ not sure about that one */
+
+ v->interfacetable[-i][j] = v->table[m->vftblindex];
+ goto foundmethod;
+ }
+ }
+ }
+
+ /* If no method was found, insert the AbstractMethodError
+ stub. */
+
+#if defined(ENABLE_JIT)
+# if defined(ENABLE_INTRP)
+ if (opt_intrp)
+ v->interfacetable[-i][j] =
+ (methodptr) (ptrint) &intrp_asm_abstractmethoderror;
+ else
+# endif
+ v->interfacetable[-i][j] =
+ (methodptr) (ptrint) &asm_abstractmethoderror;
+#else
+ v->interfacetable[-i][j] =
+ (methodptr) (ptrint) &intrp_asm_abstractmethoderror;
+#endif
+
+ foundmethod:
+ ;
+ }
+ }
+
+ /* add superinterfaces of this interface */
+
+ for (j = 0; j < ic->interfacescount; j++)
+ if (!linker_addinterface(c, ic->interfaces[j]))
+ return false;
+
+ /* everything ok */
+
+ return true;
+}
+
+
+/* class_highestinterface ******************************************************
+
+ Used by the function link_class to determine the amount of memory
+ needed for the interface table.
+
+*******************************************************************************/
+
+static s4 class_highestinterface(classinfo *c)
+{
+ s4 h;
+ s4 h2;
+ s4 i;
+
+ /* check for ACC_INTERFACE bit already done in link_class_intern */
+
+ h = c->index;
+
+ for (i = 0; i < c->interfacescount; i++) {
+ h2 = class_highestinterface(c->interfaces[i]);
+
+ if (h2 > h)
+ h = h2;
+ }
+
+ return h;
+}
+
+#if defined(__cplusplus)
+}
+#endif
+
+/*
+ * 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:
+ * vim:noexpandtab:sw=4:ts=4:
+ */
projects / cacao.git / commitdiff