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jdk-24/hotspot/src/share/vm/interpreter/linkResolver.cpp

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Initial load
2007-12-01 00:00:00 +00:00
/*
6655638: dynamic languages need method handles Initial implementation, with known omissions (x86/64, sparc, compiler optim., c-oops, C++ interp.) Reviewed-by: kvn, twisti, never
2009-04-08 10:56:49 -07:00
* Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
Initial load
2007-12-01 00:00:00 +00:00
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
#include "incls/_precompiled.incl"
#include "incls/_linkResolver.cpp.incl"
//------------------------------------------------------------------------------------------------------------------------
// Implementation of FieldAccessInfo
void FieldAccessInfo::set(KlassHandle klass, symbolHandle name, int field_index, int field_offset,
BasicType field_type, AccessFlags access_flags) {
_klass = klass;
_name = name;
_field_index = field_index;
_field_offset = field_offset;
_field_type = field_type;
_access_flags = access_flags;
}
//------------------------------------------------------------------------------------------------------------------------
// Implementation of CallInfo
void CallInfo::set_static(KlassHandle resolved_klass, methodHandle resolved_method, TRAPS) {
int vtable_index = methodOopDesc::nonvirtual_vtable_index;
set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, vtable_index, CHECK);
}
void CallInfo::set_interface(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, TRAPS) {
// This is only called for interface methods. If the resolved_method
// comes from java/lang/Object, it can be the subject of a virtual call, so
// we should pick the vtable index from the resolved method.
// Other than that case, there is no valid vtable index to specify.
int vtable_index = methodOopDesc::invalid_vtable_index;
if (resolved_method->method_holder() == SystemDictionary::object_klass()) {
assert(resolved_method->vtable_index() == selected_method->vtable_index(), "sanity check");
vtable_index = resolved_method->vtable_index();
}
set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
}
void CallInfo::set_virtual(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
assert(vtable_index >= 0 || vtable_index == methodOopDesc::nonvirtual_vtable_index, "valid index");
set_common(resolved_klass, selected_klass, resolved_method, selected_method, vtable_index, CHECK);
}
void CallInfo::set_common(KlassHandle resolved_klass, KlassHandle selected_klass, methodHandle resolved_method, methodHandle selected_method, int vtable_index, TRAPS) {
assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
_resolved_klass = resolved_klass;
_selected_klass = selected_klass;
_resolved_method = resolved_method;
_selected_method = selected_method;
_vtable_index = vtable_index;
if (CompilationPolicy::mustBeCompiled(selected_method)) {
// Note: with several active threads, the mustBeCompiled may be true
// while canBeCompiled is false; remove assert
// assert(CompilationPolicy::canBeCompiled(selected_method), "cannot compile");
if (THREAD->is_Compiler_thread()) {
// don't force compilation, resolve was on behalf of compiler
return;
}
CompileBroker::compile_method(selected_method, InvocationEntryBci,
methodHandle(), 0, "mustBeCompiled", CHECK);
}
}
//------------------------------------------------------------------------------------------------------------------------
// Klass resolution
void LinkResolver::check_klass_accessability(KlassHandle ref_klass, KlassHandle sel_klass, TRAPS) {
if (!Reflection::verify_class_access(ref_klass->as_klassOop(),
sel_klass->as_klassOop(),
true)) {
ResourceMark rm(THREAD);
Exceptions::fthrow(
THREAD_AND_LOCATION,
vmSymbolHandles::java_lang_IllegalAccessError(),
"tried to access class %s from class %s",
sel_klass->external_name(),
ref_klass->external_name()
);
return;
}
}
void LinkResolver::resolve_klass(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
klassOop result_oop = pool->klass_ref_at(index, CHECK);
result = KlassHandle(THREAD, result_oop);
}
void LinkResolver::resolve_klass_no_update(KlassHandle& result, constantPoolHandle pool, int index, TRAPS) {
klassOop result_oop =
constantPoolOopDesc::klass_ref_at_if_loaded_check(pool, index, CHECK);
result = KlassHandle(THREAD, result_oop);
}
//------------------------------------------------------------------------------------------------------------------------
// Method resolution
//
// According to JVM spec. $5.4.3c & $5.4.3d
void LinkResolver::lookup_method_in_klasses(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
methodOop result_oop = klass->uncached_lookup_method(name(), signature());
result = methodHandle(THREAD, result_oop);
}
// returns first instance method
void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
methodOop result_oop = klass->uncached_lookup_method(name(), signature());
result = methodHandle(THREAD, result_oop);
while (!result.is_null() && result->is_static()) {
klass = KlassHandle(THREAD, Klass::cast(result->method_holder())->super());
result = methodHandle(THREAD, klass->uncached_lookup_method(name(), signature()));
}
}
int LinkResolver::vtable_index_of_miranda_method(KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
ResourceMark rm(THREAD);
klassVtable *vt = instanceKlass::cast(klass())->vtable();
return vt->index_of_miranda(name(), signature());
}
void LinkResolver::lookup_method_in_interfaces(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
instanceKlass *ik = instanceKlass::cast(klass());
result = methodHandle(THREAD, ik->lookup_method_in_all_interfaces(name(), signature()));
}
6655638: dynamic languages need method handles Initial implementation, with known omissions (x86/64, sparc, compiler optim., c-oops, C++ interp.) Reviewed-by: kvn, twisti, never
2009-04-08 10:56:49 -07:00
void LinkResolver::lookup_implicit_method(methodHandle& result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS) {
if (EnableMethodHandles && MethodHandles::enabled() &&
name == vmSymbolHandles::invoke_name() && klass() == SystemDictionary::MethodHandle_klass()) {
methodOop result_oop = SystemDictionary::find_method_handle_invoke(signature,
Handle(),
Handle(),
CHECK);
if (result_oop != NULL) {
assert(result_oop->is_method_handle_invoke() && result_oop->signature() == signature(), "consistent");
result = methodHandle(THREAD, result_oop);
}
}
}
Initial load
2007-12-01 00:00:00 +00:00
void LinkResolver::check_method_accessability(KlassHandle ref_klass,
KlassHandle resolved_klass,
KlassHandle sel_klass,
methodHandle sel_method,
TRAPS) {
AccessFlags flags = sel_method->access_flags();
// Special case: arrays always override "clone". JVMS 2.15.
// If the resolved klass is an array class, and the declaring class
// is java.lang.Object and the method is "clone", set the flags
// to public.
//
// We'll check for the method name first, as that's most likely
// to be false (so we'll short-circuit out of these tests).
if (sel_method->name() == vmSymbols::clone_name() &&
sel_klass() == SystemDictionary::object_klass() &&
resolved_klass->oop_is_array()) {
// We need to change "protected" to "public".
assert(flags.is_protected(), "clone not protected?");
jint new_flags = flags.as_int();
new_flags = new_flags & (~JVM_ACC_PROTECTED);
new_flags = new_flags | JVM_ACC_PUBLIC;
flags.set_flags(new_flags);
}
if (!Reflection::verify_field_access(ref_klass->as_klassOop(),
resolved_klass->as_klassOop(),
sel_klass->as_klassOop(),
flags,
true)) {
ResourceMark rm(THREAD);
Exceptions::fthrow(
THREAD_AND_LOCATION,
vmSymbolHandles::java_lang_IllegalAccessError(),
"tried to access method %s.%s%s from class %s",
sel_klass->external_name(),
sel_method->name()->as_C_string(),
sel_method->signature()->as_C_string(),
ref_klass->external_name()
);
return;
}
}
void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle& resolved_klass,
constantPoolHandle pool, int index, TRAPS) {
// resolve klass
resolve_klass(resolved_klass, pool, index, CHECK);
symbolHandle method_name (THREAD, pool->name_ref_at(index));
symbolHandle method_signature (THREAD, pool->signature_ref_at(index));
KlassHandle current_klass(THREAD, pool->pool_holder());
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
}
void LinkResolver::resolve_interface_method(methodHandle& resolved_method, KlassHandle& resolved_klass, constantPoolHandle pool, int index, TRAPS) {
// resolve klass
resolve_klass(resolved_klass, pool, index, CHECK);
symbolHandle method_name (THREAD, pool->name_ref_at(index));
symbolHandle method_signature (THREAD, pool->signature_ref_at(index));
KlassHandle current_klass(THREAD, pool->pool_holder());
resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
}
void LinkResolver::resolve_method(methodHandle& resolved_method, KlassHandle resolved_klass,
symbolHandle method_name, symbolHandle method_signature,
KlassHandle current_klass, bool check_access, TRAPS) {
// 1. check if klass is not interface
if (resolved_klass->is_interface()) {
char buf[200];
jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected", Klass::cast(resolved_klass())->external_name());
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
// 2. lookup method in resolved klass and its super klasses
lookup_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
if (resolved_method.is_null()) { // not found in the class hierarchy
// 3. lookup method in all the interfaces implemented by the resolved klass
lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
6655638: dynamic languages need method handles Initial implementation, with known omissions (x86/64, sparc, compiler optim., c-oops, C++ interp.) Reviewed-by: kvn, twisti, never
2009-04-08 10:56:49 -07:00
if (resolved_method.is_null()) {
// JSR 292: see if this is an implicitly generated method MethodHandle.invoke(*...)
lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, CHECK);
}
Initial load
2007-12-01 00:00:00 +00:00
if (resolved_method.is_null()) {
// 4. method lookup failed
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
method_name(),
method_signature()));
}
}
// 5. check if method is concrete
if (resolved_method->is_abstract() && !resolved_klass->is_abstract()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
method_name(),
method_signature()));
}
// 6. access checks, access checking may be turned off when calling from within the VM.
if (check_access) {
assert(current_klass.not_null() , "current_klass should not be null");
// check if method can be accessed by the referring class
check_method_accessability(current_klass,
resolved_klass,
KlassHandle(THREAD, resolved_method->method_holder()),
resolved_method,
CHECK);
// check loader constraints
Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());
Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());
{
ResourceMark rm(THREAD);
char* failed_type_name =
SystemDictionary::check_signature_loaders(method_signature, loader,
class_loader, true, CHECK);
if (failed_type_name != NULL) {
const char* msg = "loader constraint violation: when resolving method"
" \"%s\" the class loader (instance of %s) of the current class, %s,"
" and the class loader (instance of %s) for resolved class, %s, have"
" different Class objects for the type %s used in the signature";
char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name(),method_signature());
const char* loader1 = SystemDictionary::loader_name(loader());
char* current = instanceKlass::cast(current_klass())->name()->as_C_string();
const char* loader2 = SystemDictionary::loader_name(class_loader());
char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();
size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
strlen(current) + strlen(loader2) + strlen(resolved) +
strlen(failed_type_name);
char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
resolved, failed_type_name);
THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
}
}
}
}
void LinkResolver::resolve_interface_method(methodHandle& resolved_method,
KlassHandle resolved_klass,
symbolHandle method_name,
symbolHandle method_signature,
KlassHandle current_klass,
bool check_access, TRAPS) {
// check if klass is interface
if (!resolved_klass->is_interface()) {
char buf[200];
jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", Klass::cast(resolved_klass())->external_name());
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
// lookup method in this interface or its super, java.lang.Object
lookup_instance_method_in_klasses(resolved_method, resolved_klass, method_name, method_signature, CHECK);
if (resolved_method.is_null()) {
// lookup method in all the super-interfaces
lookup_method_in_interfaces(resolved_method, resolved_klass, method_name, method_signature, CHECK);
if (resolved_method.is_null()) {
// no method found
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_NoSuchMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
method_name(),
method_signature()));
}
}
if (check_access) {
HandleMark hm(THREAD);
Handle loader (THREAD, instanceKlass::cast(current_klass())->class_loader());
Handle class_loader (THREAD, instanceKlass::cast(resolved_method->method_holder())->class_loader());
{
ResourceMark rm(THREAD);
char* failed_type_name =
SystemDictionary::check_signature_loaders(method_signature, loader,
class_loader, true, CHECK);
if (failed_type_name != NULL) {
const char* msg = "loader constraint violation: when resolving "
"interface method \"%s\" the class loader (instance of %s) of the "
"current class, %s, and the class loader (instance of %s) for "
"resolved class, %s, have different Class objects for the type %s "
"used in the signature";
char* sig = methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),method_name(),method_signature());
const char* loader1 = SystemDictionary::loader_name(loader());
char* current = instanceKlass::cast(current_klass())->name()->as_C_string();
const char* loader2 = SystemDictionary::loader_name(class_loader());
char* resolved = instanceKlass::cast(resolved_klass())->name()->as_C_string();
size_t buflen = strlen(msg) + strlen(sig) + strlen(loader1) +
strlen(current) + strlen(loader2) + strlen(resolved) +
strlen(failed_type_name);
char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
jio_snprintf(buf, buflen, msg, sig, loader1, current, loader2,
resolved, failed_type_name);
THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
}
}
}
}
//------------------------------------------------------------------------------------------------------------------------
// Field resolution
void LinkResolver::check_field_accessability(KlassHandle ref_klass,
KlassHandle resolved_klass,
KlassHandle sel_klass,
fieldDescriptor& fd,
TRAPS) {
if (!Reflection::verify_field_access(ref_klass->as_klassOop(),
resolved_klass->as_klassOop(),
sel_klass->as_klassOop(),
fd.access_flags(),
true)) {
ResourceMark rm(THREAD);
Exceptions::fthrow(
THREAD_AND_LOCATION,
vmSymbolHandles::java_lang_IllegalAccessError(),
"tried to access field %s.%s from class %s",
sel_klass->external_name(),
fd.name()->as_C_string(),
ref_klass->external_name()
);
return;
}
}
void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, TRAPS) {
resolve_field(result, pool, index, byte, check_only, true, CHECK);
}
void LinkResolver::resolve_field(FieldAccessInfo& result, constantPoolHandle pool, int index, Bytecodes::Code byte, bool check_only, bool update_pool, TRAPS) {
assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
byte == Bytecodes::_getfield || byte == Bytecodes::_putfield, "bad bytecode");
bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
bool is_put = (byte == Bytecodes::_putfield || byte == Bytecodes::_putstatic);
// resolve specified klass
KlassHandle resolved_klass;
if (update_pool) {
resolve_klass(resolved_klass, pool, index, CHECK);
} else {
resolve_klass_no_update(resolved_klass, pool, index, CHECK);
}
// Load these early in case the resolve of the containing klass fails
symbolOop field = pool->name_ref_at(index);
symbolHandle field_h (THREAD, field); // preserve in case we need the name
symbolOop sig = pool->signature_ref_at(index);
// Check if there's a resolved klass containing the field
if( resolved_klass.is_null() ) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
}
// Resolve instance field
fieldDescriptor fd; // find_field initializes fd if found
KlassHandle sel_klass(THREAD, instanceKlass::cast(resolved_klass())->find_field(field, sig, &fd));
// check if field exists; i.e., if a klass containing the field def has been selected
if (sel_klass.is_null()){
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
}
// check access
KlassHandle ref_klass(THREAD, pool->pool_holder());
check_field_accessability(ref_klass, resolved_klass, sel_klass, fd, CHECK);
// check for errors
if (is_static != fd.is_static()) {
char msg[200];
jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", Klass::cast(resolved_klass())->external_name(), fd.name()->as_C_string());
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
}
// Final fields can only be accessed from its own class.
if (is_put && fd.access_flags().is_final() && sel_klass() != pool->pool_holder()) {
THROW(vmSymbols::java_lang_IllegalAccessError());
}
// initialize resolved_klass if necessary
// note 1: the klass which declared the field must be initialized (i.e, sel_klass)
// according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
//
// note 2: we don't want to force initialization if we are just checking
// if the field access is legal; e.g., during compilation
if (is_static && !check_only) {
sel_klass->initialize(CHECK);
}
{
HandleMark hm(THREAD);
Handle ref_loader (THREAD, instanceKlass::cast(ref_klass())->class_loader());
Handle sel_loader (THREAD, instanceKlass::cast(sel_klass())->class_loader());
symbolHandle signature_ref (THREAD, pool->signature_ref_at(index));
{
ResourceMark rm(THREAD);
char* failed_type_name =
SystemDictionary::check_signature_loaders(signature_ref,
ref_loader, sel_loader,
false,
CHECK);
if (failed_type_name != NULL) {
const char* msg = "loader constraint violation: when resolving field"
" \"%s\" the class loader (instance of %s) of the referring class, "
"%s, and the class loader (instance of %s) for the field's resolved "
"type, %s, have different Class objects for that type";
char* field_name = field_h()->as_C_string();
const char* loader1 = SystemDictionary::loader_name(ref_loader());
char* sel = instanceKlass::cast(sel_klass())->name()->as_C_string();
const char* loader2 = SystemDictionary::loader_name(sel_loader());
size_t buflen = strlen(msg) + strlen(field_name) + strlen(loader1) +
strlen(sel) + strlen(loader2) + strlen(failed_type_name);
char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
jio_snprintf(buf, buflen, msg, field_name, loader1, sel, loader2,
failed_type_name);
THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
}
}
}
// return information. note that the klass is set to the actual klass containing the
// field, otherwise access of static fields in superclasses will not work.
KlassHandle holder (THREAD, fd.field_holder());
symbolHandle name (THREAD, fd.name());
result.set(holder, name, fd.index(), fd.offset(), fd.field_type(), fd.access_flags());
}
//------------------------------------------------------------------------------------------------------------------------
// Invoke resolution
//
// Naming conventions:
//
// resolved_method the specified method (i.e., static receiver specified via constant pool index)
// sel_method the selected method (selected via run-time lookup; e.g., based on dynamic receiver class)
// resolved_klass the specified klass (i.e., specified via constant pool index)
// recv_klass the receiver klass
void LinkResolver::resolve_static_call(CallInfo& result, KlassHandle& resolved_klass, symbolHandle method_name,
symbolHandle method_signature, KlassHandle current_klass,
bool check_access, bool initialize_class, TRAPS) {
methodHandle resolved_method;
linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
resolved_klass = KlassHandle(THREAD, Klass::cast(resolved_method->method_holder()));
// Initialize klass (this should only happen if everything is ok)
if (initialize_class && resolved_klass->should_be_initialized()) {
resolved_klass->initialize(CHECK);
linktime_resolve_static_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
}
// setup result
result.set_static(resolved_klass, resolved_method, CHECK);
}
// throws linktime exceptions
void LinkResolver::linktime_resolve_static_method(methodHandle& resolved_method, KlassHandle resolved_klass,
symbolHandle method_name, symbolHandle method_signature,
KlassHandle current_klass, bool check_access, TRAPS) {
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");
// check if static
if (!resolved_method->is_static()) {
char buf[200];
jio_snprintf(buf, sizeof(buf), "Expected static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
resolved_method->name(),
resolved_method->signature()));
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
}
void LinkResolver::resolve_special_call(CallInfo& result, KlassHandle resolved_klass, symbolHandle method_name,
symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
methodHandle resolved_method;
linktime_resolve_special_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
runtime_resolve_special_method(result, resolved_method, resolved_klass, current_klass, check_access, CHECK);
}
// throws linktime exceptions
void LinkResolver::linktime_resolve_special_method(methodHandle& resolved_method, KlassHandle resolved_klass,
symbolHandle method_name, symbolHandle method_signature,
KlassHandle current_klass, bool check_access, TRAPS) {
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
// check if method name is <init>, that it is found in same klass as static type
if (resolved_method->name() == vmSymbols::object_initializer_name() &&
resolved_method->method_holder() != resolved_klass()) {
ResourceMark rm(THREAD);
Exceptions::fthrow(
THREAD_AND_LOCATION,
vmSymbolHandles::java_lang_NoSuchMethodError(),
"%s: method %s%s not found",
resolved_klass->external_name(),
resolved_method->name()->as_C_string(),
resolved_method->signature()->as_C_string()
);
return;
}
// check if not static
if (resolved_method->is_static()) {
char buf[200];
jio_snprintf(buf, sizeof(buf),
"Expecting non-static method %s",
methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
resolved_method->name(),
resolved_method->signature()));
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
}
// throws runtime exceptions
void LinkResolver::runtime_resolve_special_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
KlassHandle current_klass, bool check_access, TRAPS) {
// resolved method is selected method unless we have an old-style lookup
methodHandle sel_method(THREAD, resolved_method());
// check if this is an old-style super call and do a new lookup if so
{ KlassHandle method_klass = KlassHandle(THREAD,
resolved_method->method_holder());
if (check_access &&
// a) check if ACC_SUPER flag is set for the current class
current_klass->is_super() &&
// b) check if the method class is a superclass of the current class (superclass relation is not reflexive!)
current_klass->is_subtype_of(method_klass()) && current_klass() != method_klass() &&
// c) check if the method is not <init>
resolved_method->name() != vmSymbols::object_initializer_name()) {
// Lookup super method
KlassHandle super_klass(THREAD, current_klass->super());
lookup_instance_method_in_klasses(sel_method, super_klass,
symbolHandle(THREAD, resolved_method->name()),
symbolHandle(THREAD, resolved_method->signature()), CHECK);
// check if found
if (sel_method.is_null()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
resolved_method->name(),
resolved_method->signature()));
}
}
}
// check if not static
if (sel_method->is_static()) {
char buf[200];
jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
resolved_method->name(),
resolved_method->signature()));
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
// check if abstract
if (sel_method->is_abstract()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
sel_method->name(),
sel_method->signature()));
}
// setup result
result.set_static(resolved_klass, sel_method, CHECK);
}
void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, KlassHandle receiver_klass, KlassHandle resolved_klass,
symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass,
bool check_access, bool check_null_and_abstract, TRAPS) {
methodHandle resolved_method;
linktime_resolve_virtual_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
runtime_resolve_virtual_method(result, resolved_method, resolved_klass, recv, receiver_klass, check_null_and_abstract, CHECK);
}
// throws linktime exceptions
void LinkResolver::linktime_resolve_virtual_method(methodHandle &resolved_method, KlassHandle resolved_klass,
symbolHandle method_name, symbolHandle method_signature,
KlassHandle current_klass, bool check_access, TRAPS) {
// normal method resolution
resolve_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
// check if not static
if (resolved_method->is_static()) {
char buf[200];
jio_snprintf(buf, sizeof(buf), "Expecting non-static method %s", methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
resolved_method->name(),
resolved_method->signature()));
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
}
// throws runtime exceptions
void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
methodHandle resolved_method,
KlassHandle resolved_klass,
Handle recv,
KlassHandle recv_klass,
bool check_null_and_abstract,
TRAPS) {
// setup default return values
int vtable_index = methodOopDesc::invalid_vtable_index;
methodHandle selected_method;
assert(recv.is_null() || recv->is_oop(), "receiver is not an oop");
// runtime method resolution
if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
THROW(vmSymbols::java_lang_NullPointerException());
}
// Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's
// has not been rewritten, and the vtable initialized.
assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
// Virtual methods cannot be resolved before its klass has been linked, for otherwise the methodOop's
// has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
// a missing receiver might result in a bogus lookup.
assert(instanceKlass::cast(resolved_method->method_holder())->is_linked(), "must be linked");
// do lookup based on receiver klass using the vtable index
if (resolved_method->method_holder()->klass_part()->is_interface()) { // miranda method
vtable_index = vtable_index_of_miranda_method(resolved_klass,
symbolHandle(THREAD, resolved_method->name()),
symbolHandle(THREAD, resolved_method->signature()), CHECK);
assert(vtable_index >= 0 , "we should have valid vtable index at this point");
instanceKlass* inst = instanceKlass::cast(recv_klass());
selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
} else {
// at this point we are sure that resolved_method is virtual and not
// a miranda method; therefore, it must have a valid vtable index.
vtable_index = resolved_method->vtable_index();
// We could get a negative vtable_index for final methods,
// because as an optimization they are they are never put in the vtable,
// unless they override an existing method.
// If we do get a negative, it means the resolved method is the the selected
// method, and it can never be changed by an override.
if (vtable_index == methodOopDesc::nonvirtual_vtable_index) {
assert(resolved_method->can_be_statically_bound(), "cannot override this method");
selected_method = resolved_method;
} else {
// recv_klass might be an arrayKlassOop but all vtables start at
// the same place. The cast is to avoid virtual call and assertion.
instanceKlass* inst = (instanceKlass*)recv_klass()->klass_part();
selected_method = methodHandle(THREAD, inst->method_at_vtable(vtable_index));
}
}
// check if method exists
if (selected_method.is_null()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
resolved_method->name(),
resolved_method->signature()));
}
// check if abstract
if (check_null_and_abstract && selected_method->is_abstract()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(resolved_klass()),
selected_method->name(),
selected_method->signature()));
}
// setup result
result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
}
void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, KlassHandle recv_klass, KlassHandle resolved_klass,
symbolHandle method_name, symbolHandle method_signature, KlassHandle current_klass,
bool check_access, bool check_null_and_abstract, TRAPS) {
methodHandle resolved_method;
linktime_resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
runtime_resolve_interface_method(result, resolved_method, resolved_klass, recv, recv_klass, check_null_and_abstract, CHECK);
}
// throws linktime exceptions
void LinkResolver::linktime_resolve_interface_method(methodHandle& resolved_method, KlassHandle resolved_klass, symbolHandle method_name,
symbolHandle method_signature, KlassHandle current_klass, bool check_access, TRAPS) {
// normal interface method resolution
resolve_interface_method(resolved_method, resolved_klass, method_name, method_signature, current_klass, check_access, CHECK);
assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");
}
// throws runtime exceptions
void LinkResolver::runtime_resolve_interface_method(CallInfo& result, methodHandle resolved_method, KlassHandle resolved_klass,
Handle recv, KlassHandle recv_klass, bool check_null_and_abstract, TRAPS) {
// check if receiver exists
if (check_null_and_abstract && recv.is_null()) {
THROW(vmSymbols::java_lang_NullPointerException());
}
// check if receiver klass implements the resolved interface
if (!recv_klass->is_subtype_of(resolved_klass())) {
char buf[200];
jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
(Klass::cast(recv_klass()))->external_name(),
(Klass::cast(resolved_klass()))->external_name());
THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
}
// do lookup based on receiver klass
methodHandle sel_method;
lookup_instance_method_in_klasses(sel_method, recv_klass,
symbolHandle(THREAD, resolved_method->name()),
symbolHandle(THREAD, resolved_method->signature()), CHECK);
// check if method exists
if (sel_method.is_null()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
resolved_method->name(),
resolved_method->signature()));
}
// check if public
if (!sel_method->is_public()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_IllegalAccessError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
sel_method->name(),
sel_method->signature()));
}
// check if abstract
if (check_null_and_abstract && sel_method->is_abstract()) {
ResourceMark rm(THREAD);
THROW_MSG(vmSymbols::java_lang_AbstractMethodError(),
methodOopDesc::name_and_sig_as_C_string(Klass::cast(recv_klass()),
sel_method->name(),
sel_method->signature()));
}
// setup result
result.set_interface(resolved_klass, recv_klass, resolved_method, sel_method, CHECK);
}
methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
KlassHandle resolved_klass,
symbolHandle method_name,
symbolHandle method_signature,
KlassHandle current_klass,
bool check_access) {
EXCEPTION_MARK;
methodHandle method_result;
linktime_resolve_interface_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
return methodHandle();
} else {
return method_result;
}
}
methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
KlassHandle resolved_klass,
symbolHandle method_name,
symbolHandle method_signature,
KlassHandle current_klass,
bool check_access) {
EXCEPTION_MARK;
methodHandle method_result;
linktime_resolve_virtual_method(method_result, resolved_klass, method_name, method_signature, current_klass, check_access, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
return methodHandle();
} else {
return method_result;
}
}
methodHandle LinkResolver::resolve_virtual_call_or_null(
KlassHandle receiver_klass,
KlassHandle resolved_klass,
symbolHandle name,
symbolHandle signature,
KlassHandle current_klass) {
EXCEPTION_MARK;
CallInfo info;
resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
return methodHandle();
}
return info.selected_method();
}
methodHandle LinkResolver::resolve_interface_call_or_null(
KlassHandle receiver_klass,
KlassHandle resolved_klass,
symbolHandle name,
symbolHandle signature,
KlassHandle current_klass) {
EXCEPTION_MARK;
CallInfo info;
resolve_interface_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
return methodHandle();
}
return info.selected_method();
}
int LinkResolver::resolve_virtual_vtable_index(
KlassHandle receiver_klass,
KlassHandle resolved_klass,
symbolHandle name,
symbolHandle signature,
KlassHandle current_klass) {
EXCEPTION_MARK;
CallInfo info;
resolve_virtual_call(info, Handle(), receiver_klass, resolved_klass, name, signature, current_klass, true, false, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
return methodOopDesc::invalid_vtable_index;
}
return info.vtable_index();
}
methodHandle LinkResolver::resolve_static_call_or_null(
KlassHandle resolved_klass,
symbolHandle name,
symbolHandle signature,
KlassHandle current_klass) {
EXCEPTION_MARK;
CallInfo info;
resolve_static_call(info, resolved_klass, name, signature, current_klass, true, false, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
return methodHandle();
}
return info.selected_method();
}
methodHandle LinkResolver::resolve_special_call_or_null(KlassHandle resolved_klass, symbolHandle name, symbolHandle signature,
KlassHandle current_klass) {
EXCEPTION_MARK;
CallInfo info;
resolve_special_call(info, resolved_klass, name, signature, current_klass, true, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
return methodHandle();
}
return info.selected_method();
}
//------------------------------------------------------------------------------------------------------------------------
// ConstantPool entries
void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, constantPoolHandle pool, int index, Bytecodes::Code byte, TRAPS) {
switch (byte) {
case Bytecodes::_invokestatic : resolve_invokestatic (result, pool, index, CHECK); break;
case Bytecodes::_invokespecial : resolve_invokespecial (result, pool, index, CHECK); break;
case Bytecodes::_invokevirtual : resolve_invokevirtual (result, recv, pool, index, CHECK); break;
6655646: dynamic languages need dynamically linked call sites Invokedynamic instruction (JSR 292 RI) Reviewed-by: twisti, never
2009-04-21 23:21:04 -07:00
case Bytecodes::_invokedynamic : resolve_invokedynamic (result, pool, index, CHECK); break;
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case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
}
return;
}
void LinkResolver::resolve_pool(KlassHandle& resolved_klass, symbolHandle& method_name, symbolHandle& method_signature,
KlassHandle& current_klass, constantPoolHandle pool, int index, TRAPS) {
// resolve klass
resolve_klass(resolved_klass, pool, index, CHECK);
// Get name, signature, and static klass
method_name = symbolHandle(THREAD, pool->name_ref_at(index));
method_signature = symbolHandle(THREAD, pool->signature_ref_at(index));
current_klass = KlassHandle(THREAD, pool->pool_holder());
}
void LinkResolver::resolve_invokestatic(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
KlassHandle resolved_klass;
symbolHandle method_name;
symbolHandle method_signature;
KlassHandle current_klass;
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
resolve_static_call(result, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
}
void LinkResolver::resolve_invokespecial(CallInfo& result, constantPoolHandle pool, int index, TRAPS) {
KlassHandle resolved_klass;
symbolHandle method_name;
symbolHandle method_signature;
KlassHandle current_klass;
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
resolve_special_call(result, resolved_klass, method_name, method_signature, current_klass, true, CHECK);
}
void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
constantPoolHandle pool, int index,
TRAPS) {
KlassHandle resolved_klass;
symbolHandle method_name;
symbolHandle method_signature;
KlassHandle current_klass;
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());
resolve_virtual_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
}
void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, constantPoolHandle pool, int index, TRAPS) {
KlassHandle resolved_klass;
symbolHandle method_name;
symbolHandle method_signature;
KlassHandle current_klass;
resolve_pool(resolved_klass, method_name, method_signature, current_klass, pool, index, CHECK);
KlassHandle recvrKlass (THREAD, recv.is_null() ? (klassOop)NULL : recv->klass());
resolve_interface_call(result, recv, recvrKlass, resolved_klass, method_name, method_signature, current_klass, true, true, CHECK);
}
6655646: dynamic languages need dynamically linked call sites Invokedynamic instruction (JSR 292 RI) Reviewed-by: twisti, never
2009-04-21 23:21:04 -07:00
void LinkResolver::resolve_invokedynamic(CallInfo& result, constantPoolHandle pool, int raw_index, TRAPS) {
assert(EnableInvokeDynamic, "");
// This guy is reached from InterpreterRuntime::resolve_invokedynamic.
assert(constantPoolCacheOopDesc::is_secondary_index(raw_index), "must be secondary index");
int nt_index = pool->map_instruction_operand_to_index(raw_index);
// At this point, we only need the signature, and can ignore the name.
symbolHandle method_signature(THREAD, pool->nt_signature_ref_at(nt_index));
symbolHandle method_name = vmSymbolHandles::invoke_name();
KlassHandle resolved_klass = SystemDictionaryHandles::MethodHandle_klass();
// JSR 292: this must be an implicitly generated method MethodHandle.invoke(*...)
// The extra MH receiver will be inserted into the stack on every call.
methodHandle resolved_method;
lookup_implicit_method(resolved_method, resolved_klass, method_name, method_signature, CHECK);
if (resolved_method.is_null()) {
THROW(vmSymbols::java_lang_InternalError());
}
result.set_virtual(resolved_klass, KlassHandle(), resolved_method, resolved_method, resolved_method->vtable_index(), CHECK);
}
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//------------------------------------------------------------------------------------------------------------------------
#ifndef PRODUCT
void FieldAccessInfo::print() {
ResourceMark rm;
tty->print_cr("Field %s@%d", name()->as_C_string(), field_offset());
}
#endif
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