| /* |
| * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
| * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/javaClasses.hpp" |
| #include "classfile/symbolTable.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "classfile/verifier.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "interpreter/linkResolver.hpp" |
| #include "memory/oopFactory.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "memory/universe.inline.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/objArrayKlass.hpp" |
| #include "oops/objArrayOop.hpp" |
| #include "prims/jvm.h" |
| #include "prims/jvmtiExport.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/reflection.hpp" |
| #include "runtime/reflectionUtils.hpp" |
| #include "runtime/signature.hpp" |
| #include "runtime/vframe.hpp" |
| |
| static void trace_class_resolution(Klass* to_class) { |
| ResourceMark rm; |
| int line_number = -1; |
| const char * source_file = NULL; |
| Klass* caller = NULL; |
| JavaThread* jthread = JavaThread::current(); |
| if (jthread->has_last_Java_frame()) { |
| vframeStream vfst(jthread); |
| // skip over any frames belonging to java.lang.Class |
| while (!vfst.at_end() && |
| vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) { |
| vfst.next(); |
| } |
| if (!vfst.at_end()) { |
| // this frame is a likely suspect |
| caller = vfst.method()->method_holder(); |
| line_number = vfst.method()->line_number_from_bci(vfst.bci()); |
| Symbol* s = vfst.method()->method_holder()->source_file_name(); |
| if (s != NULL) { |
| source_file = s->as_C_string(); |
| } |
| } |
| } |
| if (caller != NULL) { |
| const char * from = caller->external_name(); |
| const char * to = to_class->external_name(); |
| // print in a single call to reduce interleaving between threads |
| if (source_file != NULL) { |
| tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number); |
| } else { |
| tty->print("RESOLVE %s %s (reflection)\n", from, to); |
| } |
| } |
| } |
| |
| |
| oop Reflection::box(jvalue* value, BasicType type, TRAPS) { |
| if (type == T_VOID) { |
| return NULL; |
| } |
| if (type == T_OBJECT || type == T_ARRAY) { |
| // regular objects are not boxed |
| return (oop) value->l; |
| } |
| oop result = java_lang_boxing_object::create(type, value, CHECK_NULL); |
| if (result == NULL) { |
| THROW_(vmSymbols::java_lang_IllegalArgumentException(), result); |
| } |
| return result; |
| } |
| |
| |
| BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) { |
| if (box == NULL) { |
| THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL); |
| } |
| return java_lang_boxing_object::get_value(box, value); |
| } |
| |
| BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) { |
| // Note: box is really the unboxed oop. It might even be a Short, etc.! |
| value->l = (jobject) box; |
| return T_OBJECT; |
| } |
| |
| |
| void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) { |
| assert(wide_type != current_type, "widen should not be called with identical types"); |
| switch (wide_type) { |
| case T_BOOLEAN: |
| case T_BYTE: |
| case T_CHAR: |
| break; // fail |
| case T_SHORT: |
| switch (current_type) { |
| case T_BYTE: |
| value->s = (jshort) value->b; |
| return; |
| } |
| break; // fail |
| case T_INT: |
| switch (current_type) { |
| case T_BYTE: |
| value->i = (jint) value->b; |
| return; |
| case T_CHAR: |
| value->i = (jint) value->c; |
| return; |
| case T_SHORT: |
| value->i = (jint) value->s; |
| return; |
| } |
| break; // fail |
| case T_LONG: |
| switch (current_type) { |
| case T_BYTE: |
| value->j = (jlong) value->b; |
| return; |
| case T_CHAR: |
| value->j = (jlong) value->c; |
| return; |
| case T_SHORT: |
| value->j = (jlong) value->s; |
| return; |
| case T_INT: |
| value->j = (jlong) value->i; |
| return; |
| } |
| break; // fail |
| case T_FLOAT: |
| switch (current_type) { |
| case T_BYTE: |
| value->f = (jfloat) value->b; |
| return; |
| case T_CHAR: |
| value->f = (jfloat) value->c; |
| return; |
| case T_SHORT: |
| value->f = (jfloat) value->s; |
| return; |
| case T_INT: |
| value->f = (jfloat) value->i; |
| return; |
| case T_LONG: |
| value->f = (jfloat) value->j; |
| return; |
| } |
| break; // fail |
| case T_DOUBLE: |
| switch (current_type) { |
| case T_BYTE: |
| value->d = (jdouble) value->b; |
| return; |
| case T_CHAR: |
| value->d = (jdouble) value->c; |
| return; |
| case T_SHORT: |
| value->d = (jdouble) value->s; |
| return; |
| case T_INT: |
| value->d = (jdouble) value->i; |
| return; |
| case T_FLOAT: |
| value->d = (jdouble) value->f; |
| return; |
| case T_LONG: |
| value->d = (jdouble) value->j; |
| return; |
| } |
| break; // fail |
| default: |
| break; // fail |
| } |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); |
| } |
| |
| |
| BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) { |
| if (!a->is_within_bounds(index)) { |
| THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL); |
| } |
| if (a->is_objArray()) { |
| value->l = (jobject) objArrayOop(a)->obj_at(index); |
| return T_OBJECT; |
| } else { |
| assert(a->is_typeArray(), "just checking"); |
| BasicType type = TypeArrayKlass::cast(a->klass())->element_type(); |
| switch (type) { |
| case T_BOOLEAN: |
| value->z = typeArrayOop(a)->bool_at(index); |
| break; |
| case T_CHAR: |
| value->c = typeArrayOop(a)->char_at(index); |
| break; |
| case T_FLOAT: |
| value->f = typeArrayOop(a)->float_at(index); |
| break; |
| case T_DOUBLE: |
| value->d = typeArrayOop(a)->double_at(index); |
| break; |
| case T_BYTE: |
| value->b = typeArrayOop(a)->byte_at(index); |
| break; |
| case T_SHORT: |
| value->s = typeArrayOop(a)->short_at(index); |
| break; |
| case T_INT: |
| value->i = typeArrayOop(a)->int_at(index); |
| break; |
| case T_LONG: |
| value->j = typeArrayOop(a)->long_at(index); |
| break; |
| default: |
| return T_ILLEGAL; |
| } |
| return type; |
| } |
| } |
| |
| |
| void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) { |
| if (!a->is_within_bounds(index)) { |
| THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); |
| } |
| if (a->is_objArray()) { |
| if (value_type == T_OBJECT) { |
| oop obj = (oop) value->l; |
| if (obj != NULL) { |
| Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass(); |
| if (!obj->is_a(element_klass)) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch"); |
| } |
| } |
| objArrayOop(a)->obj_at_put(index, obj); |
| } |
| } else { |
| assert(a->is_typeArray(), "just checking"); |
| BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type(); |
| if (array_type != value_type) { |
| // The widen operation can potentially throw an exception, but cannot block, |
| // so typeArrayOop a is safe if the call succeeds. |
| widen(value, value_type, array_type, CHECK); |
| } |
| switch (array_type) { |
| case T_BOOLEAN: |
| typeArrayOop(a)->bool_at_put(index, value->z); |
| break; |
| case T_CHAR: |
| typeArrayOop(a)->char_at_put(index, value->c); |
| break; |
| case T_FLOAT: |
| typeArrayOop(a)->float_at_put(index, value->f); |
| break; |
| case T_DOUBLE: |
| typeArrayOop(a)->double_at_put(index, value->d); |
| break; |
| case T_BYTE: |
| typeArrayOop(a)->byte_at_put(index, value->b); |
| break; |
| case T_SHORT: |
| typeArrayOop(a)->short_at_put(index, value->s); |
| break; |
| case T_INT: |
| typeArrayOop(a)->int_at_put(index, value->i); |
| break; |
| case T_LONG: |
| typeArrayOop(a)->long_at_put(index, value->j); |
| break; |
| default: |
| THROW(vmSymbols::java_lang_IllegalArgumentException()); |
| } |
| } |
| } |
| |
| |
| Klass* Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) { |
| assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); |
| BasicType type = java_lang_Class::primitive_type(basic_type_mirror); |
| if (type == T_VOID) { |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| } else { |
| return Universe::typeArrayKlassObj(type); |
| } |
| } |
| |
| |
| oop Reflection:: basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) { |
| BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type(); |
| return Universe::java_mirror(type); |
| } |
| |
| |
| arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) { |
| if (element_mirror == NULL) { |
| THROW_0(vmSymbols::java_lang_NullPointerException()); |
| } |
| if (length < 0) { |
| THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
| } |
| if (java_lang_Class::is_primitive(element_mirror)) { |
| Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); |
| return TypeArrayKlass::cast(tak)->allocate(length, THREAD); |
| } else { |
| Klass* k = java_lang_Class::as_Klass(element_mirror); |
| if (k->oop_is_array() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) { |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| } |
| return oopFactory::new_objArray(k, length, THREAD); |
| } |
| } |
| |
| |
| arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) { |
| assert(dim_array->is_typeArray(), "just checking"); |
| assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking"); |
| |
| if (element_mirror == NULL) { |
| THROW_0(vmSymbols::java_lang_NullPointerException()); |
| } |
| |
| int len = dim_array->length(); |
| if (len <= 0 || len > MAX_DIM) { |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| } |
| |
| jint dimensions[MAX_DIM]; // C array copy of intArrayOop |
| for (int i = 0; i < len; i++) { |
| int d = dim_array->int_at(i); |
| if (d < 0) { |
| THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
| } |
| dimensions[i] = d; |
| } |
| |
| Klass* klass; |
| int dim = len; |
| if (java_lang_Class::is_primitive(element_mirror)) { |
| klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL); |
| } else { |
| klass = java_lang_Class::as_Klass(element_mirror); |
| if (klass->oop_is_array()) { |
| int k_dim = ArrayKlass::cast(klass)->dimension(); |
| if (k_dim + len > MAX_DIM) { |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| } |
| dim += k_dim; |
| } |
| } |
| klass = klass->array_klass(dim, CHECK_NULL); |
| oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL); |
| assert(obj->is_array(), "just checking"); |
| return arrayOop(obj); |
| } |
| |
| |
| oop Reflection::array_component_type(oop mirror, TRAPS) { |
| if (java_lang_Class::is_primitive(mirror)) { |
| return NULL; |
| } |
| |
| Klass* klass = java_lang_Class::as_Klass(mirror); |
| if (!klass->oop_is_array()) { |
| return NULL; |
| } |
| |
| oop result = ArrayKlass::cast(klass)->component_mirror(); |
| #ifdef ASSERT |
| oop result2 = NULL; |
| if (ArrayKlass::cast(klass)->dimension() == 1) { |
| if (klass->oop_is_typeArray()) { |
| result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL); |
| } else { |
| result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror(); |
| } |
| } else { |
| Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension(); |
| assert(lower_dim->oop_is_array(), "just checking"); |
| result2 = lower_dim->java_mirror(); |
| } |
| assert(result == result2, "results must be consistent"); |
| #endif //ASSERT |
| return result; |
| } |
| |
| |
| bool Reflection::reflect_check_access(Klass* field_class, AccessFlags acc, Klass* target_class, bool is_method_invoke, TRAPS) { |
| // field_class : declaring class |
| // acc : declared field access |
| // target_class : for protected |
| |
| // Check if field or method is accessible to client. Throw an |
| // IllegalAccessException and return false if not. |
| |
| // The "client" is the class associated with the nearest real frame |
| // getCallerClass already skips Method.invoke frames, so pass 0 in |
| // that case (same as classic). |
| ResourceMark rm(THREAD); |
| assert(THREAD->is_Java_thread(), "sanity check"); |
| Klass* client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1); |
| |
| if (client_class != field_class) { |
| if (!verify_class_access(client_class, field_class, false) |
| || !verify_field_access(client_class, |
| field_class, |
| field_class, |
| acc, |
| false)) { |
| THROW_(vmSymbols::java_lang_IllegalAccessException(), false); |
| } |
| } |
| |
| // Additional test for protected members: JLS 6.6.2 |
| |
| if (acc.is_protected()) { |
| if (target_class != client_class) { |
| if (!is_same_class_package(client_class, field_class)) { |
| if (!target_class->is_subclass_of(client_class)) { |
| THROW_(vmSymbols::java_lang_IllegalAccessException(), false); |
| } |
| } |
| } |
| } |
| |
| // Passed all tests |
| return true; |
| } |
| |
| |
| bool Reflection::verify_class_access(Klass* current_class, Klass* new_class, bool classloader_only) { |
| // Verify that current_class can access new_class. If the classloader_only |
| // flag is set, we automatically allow any accesses in which current_class |
| // doesn't have a classloader. |
| if ((current_class == NULL) || |
| (current_class == new_class) || |
| (new_class->is_public()) || |
| is_same_class_package(current_class, new_class)) { |
| return true; |
| } |
| // New (1.4) reflection implementation. Allow all accesses from |
| // sun/reflect/MagicAccessorImpl subclasses to succeed trivially. |
| if ( JDK_Version::is_gte_jdk14x_version() |
| && UseNewReflection |
| && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { |
| return true; |
| } |
| |
| return can_relax_access_check_for(current_class, new_class, classloader_only); |
| } |
| |
| static bool under_host_klass(InstanceKlass* ik, Klass* host_klass) { |
| DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000); |
| for (;;) { |
| Klass* hc = (Klass*) ik->host_klass(); |
| if (hc == NULL) return false; |
| if (hc == host_klass) return true; |
| ik = InstanceKlass::cast(hc); |
| |
| // There's no way to make a host class loop short of patching memory. |
| // Therefore there cannot be a loop here unless there's another bug. |
| // Still, let's check for it. |
| assert(--inf_loop_check > 0, "no host_klass loop"); |
| } |
| } |
| |
| bool Reflection::can_relax_access_check_for( |
| Klass* accessor, Klass* accessee, bool classloader_only) { |
| InstanceKlass* accessor_ik = InstanceKlass::cast(accessor); |
| InstanceKlass* accessee_ik = InstanceKlass::cast(accessee); |
| |
| // If either is on the other's host_klass chain, access is OK, |
| // because one is inside the other. |
| if (under_host_klass(accessor_ik, accessee) || |
| under_host_klass(accessee_ik, accessor)) |
| return true; |
| |
| if ((RelaxAccessControlCheck && |
| accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION && |
| accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) || |
| (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION && |
| accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) { |
| return classloader_only && |
| Verifier::relax_verify_for(accessor_ik->class_loader()) && |
| accessor_ik->protection_domain() == accessee_ik->protection_domain() && |
| accessor_ik->class_loader() == accessee_ik->class_loader(); |
| } else { |
| return false; |
| } |
| } |
| |
| bool Reflection::verify_field_access(Klass* current_class, |
| Klass* resolved_class, |
| Klass* field_class, |
| AccessFlags access, |
| bool classloader_only, |
| bool protected_restriction) { |
| // Verify that current_class can access a field of field_class, where that |
| // field's access bits are "access". We assume that we've already verified |
| // that current_class can access field_class. |
| // |
| // If the classloader_only flag is set, we automatically allow any accesses |
| // in which current_class doesn't have a classloader. |
| // |
| // "resolved_class" is the runtime type of "field_class". Sometimes we don't |
| // need this distinction (e.g. if all we have is the runtime type, or during |
| // class file parsing when we only care about the static type); in that case |
| // callers should ensure that resolved_class == field_class. |
| // |
| if ((current_class == NULL) || |
| (current_class == field_class) || |
| access.is_public()) { |
| return true; |
| } |
| |
| Klass* host_class = current_class; |
| while (host_class->oop_is_instance() && |
| InstanceKlass::cast(host_class)->is_anonymous()) { |
| Klass* next_host_class = InstanceKlass::cast(host_class)->host_klass(); |
| if (next_host_class == NULL) break; |
| host_class = next_host_class; |
| } |
| if (host_class == field_class) { |
| return true; |
| } |
| |
| if (access.is_protected()) { |
| if (!protected_restriction) { |
| // See if current_class (or outermost host class) is a subclass of field_class |
| // An interface may not access protected members of j.l.Object |
| if (!host_class->is_interface() && host_class->is_subclass_of(field_class)) { |
| if (access.is_static() || // static fields are ok, see 6622385 |
| current_class == resolved_class || |
| field_class == resolved_class || |
| host_class->is_subclass_of(resolved_class) || |
| resolved_class->is_subclass_of(host_class)) { |
| return true; |
| } |
| } |
| } |
| } |
| |
| if (!access.is_private() && is_same_class_package(current_class, field_class)) { |
| return true; |
| } |
| |
| // New (1.4) reflection implementation. Allow all accesses from |
| // sun/reflect/MagicAccessorImpl subclasses to succeed trivially. |
| if ( JDK_Version::is_gte_jdk14x_version() |
| && UseNewReflection |
| && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) { |
| return true; |
| } |
| |
| return can_relax_access_check_for( |
| current_class, field_class, classloader_only); |
| } |
| |
| |
| bool Reflection::is_same_class_package(Klass* class1, Klass* class2) { |
| return InstanceKlass::cast(class1)->is_same_class_package(class2); |
| } |
| |
| bool Reflection::is_same_package_member(Klass* class1, Klass* class2, TRAPS) { |
| return InstanceKlass::cast(class1)->is_same_package_member(class2, THREAD); |
| } |
| |
| |
| // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not, |
| // throw an incompatible class change exception |
| // If inner_is_member, require the inner to be a member of the outer. |
| // If !inner_is_member, require the inner to be anonymous (a non-member). |
| // Caller is responsible for figuring out in advance which case must be true. |
| void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, |
| bool inner_is_member, TRAPS) { |
| InnerClassesIterator iter(outer); |
| constantPoolHandle cp (THREAD, outer->constants()); |
| for (; !iter.done(); iter.next()) { |
| int ioff = iter.inner_class_info_index(); |
| int ooff = iter.outer_class_info_index(); |
| |
| if (inner_is_member && ioff != 0 && ooff != 0) { |
| Klass* o = cp->klass_at(ooff, CHECK); |
| if (o == outer()) { |
| Klass* i = cp->klass_at(ioff, CHECK); |
| if (i == inner()) { |
| return; |
| } |
| } |
| } |
| if (!inner_is_member && ioff != 0 && ooff == 0 && |
| cp->klass_name_at_matches(inner, ioff)) { |
| Klass* i = cp->klass_at(ioff, CHECK); |
| if (i == inner()) { |
| return; |
| } |
| } |
| } |
| |
| // 'inner' not declared as an inner klass in outer |
| ResourceMark rm(THREAD); |
| Exceptions::fthrow( |
| THREAD_AND_LOCATION, |
| vmSymbols::java_lang_IncompatibleClassChangeError(), |
| "%s and %s disagree on InnerClasses attribute", |
| outer->external_name(), |
| inner->external_name() |
| ); |
| } |
| |
| // Utility method converting a single SignatureStream element into java.lang.Class instance |
| |
| oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) { |
| switch (ss->type()) { |
| default: |
| assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type"); |
| return java_lang_Class::primitive_mirror(ss->type()); |
| case T_OBJECT: |
| case T_ARRAY: |
| Symbol* name = ss->as_symbol(CHECK_NULL); |
| oop loader = method->method_holder()->class_loader(); |
| oop protection_domain = method->method_holder()->protection_domain(); |
| Klass* k = SystemDictionary::resolve_or_fail( |
| name, |
| Handle(THREAD, loader), |
| Handle(THREAD, protection_domain), |
| true, CHECK_NULL); |
| if (TraceClassResolution) { |
| trace_class_resolution(k); |
| } |
| return k->java_mirror(); |
| }; |
| } |
| |
| |
| objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) { |
| // Allocate array holding parameter types (java.lang.Class instances) |
| objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle())); |
| objArrayHandle mirrors (THREAD, m); |
| int index = 0; |
| // Collect parameter types |
| ResourceMark rm(THREAD); |
| Symbol* signature = method->signature(); |
| SignatureStream ss(signature); |
| while (!ss.at_return_type()) { |
| oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); |
| mirrors->obj_at_put(index++, mirror); |
| ss.next(); |
| } |
| assert(index == parameter_count, "invalid parameter count"); |
| if (return_type != NULL) { |
| // Collect return type as well |
| assert(ss.at_return_type(), "return type should be present"); |
| *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle())); |
| } |
| return mirrors; |
| } |
| |
| objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) { |
| return method->resolved_checked_exceptions(CHECK_(objArrayHandle())); |
| } |
| |
| |
| Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) { |
| // Basic types |
| BasicType type = vmSymbols::signature_type(signature); |
| if (type != T_OBJECT) { |
| return Handle(THREAD, Universe::java_mirror(type)); |
| } |
| |
| oop loader = InstanceKlass::cast(k())->class_loader(); |
| oop protection_domain = k()->protection_domain(); |
| Klass* result = SystemDictionary::resolve_or_fail(signature, |
| Handle(THREAD, loader), |
| Handle(THREAD, protection_domain), |
| true, CHECK_(Handle())); |
| |
| if (TraceClassResolution) { |
| trace_class_resolution(result); |
| } |
| |
| oop nt = result->java_mirror(); |
| return Handle(THREAD, nt); |
| } |
| |
| |
| oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) { |
| // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert. |
| // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods. |
| assert(!method()->is_initializer() || |
| (for_constant_pool_access && method()->is_static()) || |
| (method()->name() == vmSymbols::class_initializer_name() |
| && method()->method_holder()->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead"); |
| instanceKlassHandle holder (THREAD, method->method_holder()); |
| int slot = method->method_idnum(); |
| |
| Symbol* signature = method->signature(); |
| int parameter_count = ArgumentCount(signature).size(); |
| oop return_type_oop = NULL; |
| objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL); |
| if (parameter_types.is_null() || return_type_oop == NULL) return NULL; |
| |
| Handle return_type(THREAD, return_type_oop); |
| |
| objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); |
| |
| if (exception_types.is_null()) return NULL; |
| |
| Symbol* method_name = method->name(); |
| Handle name; |
| if (intern_name) { |
| // intern_name is only true with UseNewReflection |
| oop name_oop = StringTable::intern(method_name, CHECK_NULL); |
| name = Handle(THREAD, name_oop); |
| } else { |
| name = java_lang_String::create_from_symbol(method_name, CHECK_NULL); |
| } |
| if (name == NULL) return NULL; |
| |
| int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; |
| |
| Handle mh = java_lang_reflect_Method::create(CHECK_NULL); |
| |
| java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror()); |
| java_lang_reflect_Method::set_slot(mh(), slot); |
| java_lang_reflect_Method::set_name(mh(), name()); |
| java_lang_reflect_Method::set_return_type(mh(), return_type()); |
| java_lang_reflect_Method::set_parameter_types(mh(), parameter_types()); |
| java_lang_reflect_Method::set_exception_types(mh(), exception_types()); |
| java_lang_reflect_Method::set_modifiers(mh(), modifiers); |
| java_lang_reflect_Method::set_override(mh(), false); |
| if (java_lang_reflect_Method::has_signature_field() && |
| method->generic_signature() != NULL) { |
| Symbol* gs = method->generic_signature(); |
| Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); |
| java_lang_reflect_Method::set_signature(mh(), sig()); |
| } |
| if (java_lang_reflect_Method::has_annotations_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); |
| java_lang_reflect_Method::set_annotations(mh(), an_oop); |
| } |
| if (java_lang_reflect_Method::has_parameter_annotations_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); |
| java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop); |
| } |
| if (java_lang_reflect_Method::has_annotation_default_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL); |
| java_lang_reflect_Method::set_annotation_default(mh(), an_oop); |
| } |
| if (java_lang_reflect_Method::has_type_annotations_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); |
| java_lang_reflect_Method::set_type_annotations(mh(), an_oop); |
| } |
| return mh(); |
| } |
| |
| |
| oop Reflection::new_constructor(methodHandle method, TRAPS) { |
| assert(method()->is_initializer(), "should call new_method instead"); |
| |
| instanceKlassHandle holder (THREAD, method->method_holder()); |
| int slot = method->method_idnum(); |
| |
| Symbol* signature = method->signature(); |
| int parameter_count = ArgumentCount(signature).size(); |
| objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL); |
| if (parameter_types.is_null()) return NULL; |
| |
| objArrayHandle exception_types = get_exception_types(method, CHECK_NULL); |
| if (exception_types.is_null()) return NULL; |
| |
| int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; |
| |
| Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL); |
| |
| java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror()); |
| java_lang_reflect_Constructor::set_slot(ch(), slot); |
| java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types()); |
| java_lang_reflect_Constructor::set_exception_types(ch(), exception_types()); |
| java_lang_reflect_Constructor::set_modifiers(ch(), modifiers); |
| java_lang_reflect_Constructor::set_override(ch(), false); |
| if (java_lang_reflect_Constructor::has_signature_field() && |
| method->generic_signature() != NULL) { |
| Symbol* gs = method->generic_signature(); |
| Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); |
| java_lang_reflect_Constructor::set_signature(ch(), sig()); |
| } |
| if (java_lang_reflect_Constructor::has_annotations_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL); |
| java_lang_reflect_Constructor::set_annotations(ch(), an_oop); |
| } |
| if (java_lang_reflect_Constructor::has_parameter_annotations_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL); |
| java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop); |
| } |
| if (java_lang_reflect_Constructor::has_type_annotations_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL); |
| java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop); |
| } |
| return ch(); |
| } |
| |
| |
| oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) { |
| Symbol* field_name = fd->name(); |
| Handle name; |
| if (intern_name) { |
| // intern_name is only true with UseNewReflection |
| oop name_oop = StringTable::intern(field_name, CHECK_NULL); |
| name = Handle(THREAD, name_oop); |
| } else { |
| name = java_lang_String::create_from_symbol(field_name, CHECK_NULL); |
| } |
| Symbol* signature = fd->signature(); |
| instanceKlassHandle holder (THREAD, fd->field_holder()); |
| Handle type = new_type(signature, holder, CHECK_NULL); |
| Handle rh = java_lang_reflect_Field::create(CHECK_NULL); |
| |
| java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror()); |
| java_lang_reflect_Field::set_slot(rh(), fd->index()); |
| java_lang_reflect_Field::set_name(rh(), name()); |
| java_lang_reflect_Field::set_type(rh(), type()); |
| // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here. |
| java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); |
| java_lang_reflect_Field::set_override(rh(), false); |
| if (java_lang_reflect_Field::has_signature_field() && |
| fd->has_generic_signature()) { |
| Symbol* gs = fd->generic_signature(); |
| Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL); |
| java_lang_reflect_Field::set_signature(rh(), sig()); |
| } |
| if (java_lang_reflect_Field::has_annotations_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL); |
| java_lang_reflect_Field::set_annotations(rh(), an_oop); |
| } |
| if (java_lang_reflect_Field::has_type_annotations_field()) { |
| typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL); |
| java_lang_reflect_Field::set_type_annotations(rh(), an_oop); |
| } |
| return rh(); |
| } |
| |
| oop Reflection::new_parameter(Handle method, int index, Symbol* sym, |
| int flags, TRAPS) { |
| Handle name; |
| |
| // A null symbol here translates to the empty string |
| if(NULL != sym) { |
| name = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
| } else { |
| name = java_lang_String::create_from_str("", CHECK_NULL); |
| } |
| |
| Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL); |
| java_lang_reflect_Parameter::set_name(rh(), name()); |
| java_lang_reflect_Parameter::set_modifiers(rh(), flags); |
| java_lang_reflect_Parameter::set_executable(rh(), method()); |
| java_lang_reflect_Parameter::set_index(rh(), index); |
| return rh(); |
| } |
| |
| |
| methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method, |
| KlassHandle recv_klass, Handle receiver, TRAPS) { |
| assert(!method.is_null() , "method should not be null"); |
| |
| CallInfo info; |
| Symbol* signature = method->signature(); |
| Symbol* name = method->name(); |
| LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass, |
| name, signature, |
| KlassHandle(), false, true, |
| CHECK_(methodHandle())); |
| return info.selected_method(); |
| } |
| |
| |
| oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method, |
| Handle receiver, bool override, objArrayHandle ptypes, |
| BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) { |
| ResourceMark rm(THREAD); |
| |
| methodHandle method; // actual method to invoke |
| KlassHandle target_klass; // target klass, receiver's klass for non-static |
| |
| // Ensure klass is initialized |
| klass->initialize(CHECK_NULL); |
| |
| bool is_static = reflected_method->is_static(); |
| if (is_static) { |
| // ignore receiver argument |
| method = reflected_method; |
| target_klass = klass; |
| } else { |
| // check for null receiver |
| if (receiver.is_null()) { |
| THROW_0(vmSymbols::java_lang_NullPointerException()); |
| } |
| // Check class of receiver against class declaring method |
| if (!receiver->is_a(klass())) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class"); |
| } |
| // target klass is receiver's klass |
| target_klass = KlassHandle(THREAD, receiver->klass()); |
| // no need to resolve if method is private or <init> |
| if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) { |
| method = reflected_method; |
| } else { |
| // resolve based on the receiver |
| if (reflected_method->method_holder()->is_interface()) { |
| // resolve interface call |
| if (ReflectionWrapResolutionErrors) { |
| // new default: 6531596 |
| // Match resolution errors with those thrown due to reflection inlining |
| // Linktime resolution & IllegalAccessCheck already done by Class.getMethod() |
| method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| // Method resolution threw an exception; wrap it in an InvocationTargetException |
| oop resolution_exception = PENDING_EXCEPTION; |
| CLEAR_PENDING_EXCEPTION; |
| // JVMTI has already reported the pending exception |
| // JVMTI internal flag reset is needed in order to report InvocationTargetException |
| if (THREAD->is_Java_thread()) { |
| JvmtiExport::clear_detected_exception((JavaThread*) THREAD); |
| } |
| JavaCallArguments args(Handle(THREAD, resolution_exception)); |
| THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), |
| vmSymbols::throwable_void_signature(), |
| &args); |
| } |
| } else { |
| method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL)); |
| } |
| } else { |
| // if the method can be overridden, we resolve using the vtable index. |
| assert(!reflected_method->has_itable_index(), ""); |
| int index = reflected_method->vtable_index(); |
| method = reflected_method; |
| if (index != Method::nonvirtual_vtable_index) { |
| // target_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*)target_klass(); |
| method = methodHandle(THREAD, inst->method_at_vtable(index)); |
| } |
| if (!method.is_null()) { |
| // Check for abstract methods as well |
| if (method->is_abstract()) { |
| // new default: 6531596 |
| if (ReflectionWrapResolutionErrors) { |
| ResourceMark rm(THREAD); |
| Handle h_origexception = Exceptions::new_exception(THREAD, |
| vmSymbols::java_lang_AbstractMethodError(), |
| Method::name_and_sig_as_C_string(target_klass(), |
| method->name(), |
| method->signature())); |
| JavaCallArguments args(h_origexception); |
| THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), |
| vmSymbols::throwable_void_signature(), |
| &args); |
| } else { |
| ResourceMark rm(THREAD); |
| THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(), |
| Method::name_and_sig_as_C_string(target_klass(), |
| method->name(), |
| method->signature())); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| // I believe this is a ShouldNotGetHere case which requires |
| // an internal vtable bug. If you ever get this please let Karen know. |
| if (method.is_null()) { |
| ResourceMark rm(THREAD); |
| THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), |
| Method::name_and_sig_as_C_string(klass(), |
| reflected_method->name(), |
| reflected_method->signature())); |
| } |
| |
| // In the JDK 1.4 reflection implementation, the security check is |
| // done at the Java level |
| if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) { |
| |
| // Access checking (unless overridden by Method) |
| if (!override) { |
| if (!(klass->is_public() && reflected_method->is_public())) { |
| bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL); |
| if (!access) { |
| return NULL; // exception |
| } |
| } |
| } |
| |
| } // !(Universe::is_gte_jdk14x_version() && UseNewReflection) |
| |
| assert(ptypes->is_objArray(), "just checking"); |
| int args_len = args.is_null() ? 0 : args->length(); |
| // Check number of arguments |
| if (ptypes->length() != args_len) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments"); |
| } |
| |
| // Create object to contain parameters for the JavaCall |
| JavaCallArguments java_args(method->size_of_parameters()); |
| |
| if (!is_static) { |
| java_args.push_oop(receiver); |
| } |
| |
| for (int i = 0; i < args_len; i++) { |
| oop type_mirror = ptypes->obj_at(i); |
| oop arg = args->obj_at(i); |
| if (java_lang_Class::is_primitive(type_mirror)) { |
| jvalue value; |
| BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL); |
| BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL); |
| if (ptype != atype) { |
| widen(&value, atype, ptype, CHECK_NULL); |
| } |
| switch (ptype) { |
| case T_BOOLEAN: java_args.push_int(value.z); break; |
| case T_CHAR: java_args.push_int(value.c); break; |
| case T_BYTE: java_args.push_int(value.b); break; |
| case T_SHORT: java_args.push_int(value.s); break; |
| case T_INT: java_args.push_int(value.i); break; |
| case T_LONG: java_args.push_long(value.j); break; |
| case T_FLOAT: java_args.push_float(value.f); break; |
| case T_DOUBLE: java_args.push_double(value.d); break; |
| default: |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); |
| } |
| } else { |
| if (arg != NULL) { |
| Klass* k = java_lang_Class::as_Klass(type_mirror); |
| if (!arg->is_a(k)) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); |
| } |
| } |
| Handle arg_handle(THREAD, arg); // Create handle for argument |
| java_args.push_oop(arg_handle); // Push handle |
| } |
| } |
| |
| assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking"); |
| |
| // All oops (including receiver) is passed in as Handles. An potential oop is returned as an |
| // oop (i.e., NOT as an handle) |
| JavaValue result(rtype); |
| JavaCalls::call(&result, method, &java_args, THREAD); |
| |
| if (HAS_PENDING_EXCEPTION) { |
| // Method threw an exception; wrap it in an InvocationTargetException |
| oop target_exception = PENDING_EXCEPTION; |
| CLEAR_PENDING_EXCEPTION; |
| // JVMTI has already reported the pending exception |
| // JVMTI internal flag reset is needed in order to report InvocationTargetException |
| if (THREAD->is_Java_thread()) { |
| JvmtiExport::clear_detected_exception((JavaThread*) THREAD); |
| } |
| |
| JavaCallArguments args(Handle(THREAD, target_exception)); |
| THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(), |
| vmSymbols::throwable_void_signature(), |
| &args); |
| } else { |
| if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) |
| narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); |
| return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL); |
| } |
| } |
| |
| |
| void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) { |
| switch (narrow_type) { |
| case T_BOOLEAN: |
| value->z = (jboolean) (value->i & 1); |
| return; |
| case T_BYTE: |
| value->b = (jbyte) value->i; |
| return; |
| case T_CHAR: |
| value->c = (jchar) value->i; |
| return; |
| case T_SHORT: |
| value->s = (jshort) value->i; |
| return; |
| default: |
| break; // fail |
| } |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch"); |
| } |
| |
| |
| BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) { |
| assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking"); |
| return java_lang_Class::primitive_type(basic_type_mirror); |
| } |
| |
| // This would be nicer if, say, java.lang.reflect.Method was a subclass |
| // of java.lang.reflect.Constructor |
| |
| oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) { |
| oop mirror = java_lang_reflect_Method::clazz(method_mirror); |
| int slot = java_lang_reflect_Method::slot(method_mirror); |
| bool override = java_lang_reflect_Method::override(method_mirror) != 0; |
| objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror))); |
| |
| oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror); |
| BasicType rtype; |
| if (java_lang_Class::is_primitive(return_type_mirror)) { |
| rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL); |
| } else { |
| rtype = T_OBJECT; |
| } |
| |
| instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror)); |
| Method* m = klass->method_with_idnum(slot); |
| if (m == NULL) { |
| THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); |
| } |
| methodHandle method(THREAD, m); |
| |
| return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD); |
| } |
| |
| |
| oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) { |
| oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror); |
| int slot = java_lang_reflect_Constructor::slot(constructor_mirror); |
| bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0; |
| objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror))); |
| |
| instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror)); |
| Method* m = klass->method_with_idnum(slot); |
| if (m == NULL) { |
| THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke"); |
| } |
| methodHandle method(THREAD, m); |
| assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor"); |
| |
| // Make sure klass gets initialize |
| klass->initialize(CHECK_NULL); |
| |
| // Create new instance (the receiver) |
| klass->check_valid_for_instantiation(false, CHECK_NULL); |
| Handle receiver = klass->allocate_instance_handle(CHECK_NULL); |
| |
| // Ignore result from call and return receiver |
| invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL); |
| return receiver(); |
| } |
