/* * Copyright (c) 1994, 2003, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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. */ package sun.tools.tree; import sun.tools.java.*;import sun.tools.asm.Assembler;import java.io.PrintStream;import java.util.Hashtable; /** * WARNING: The contents of this source file are not part of any * supported API. Code that depends on them does so at its own risk: * they are subject to change or removal without notice. */publicclass MethodExpression extends NaryExpression { Identifier id; ClassDefinition clazz; // The class in which the called method is defined MemberDefinition field; Expression implementation; private boolean isSuper; // Set if qualified by 'super' or '<class>.super'. /** * constructor */ public MethodExpression(long where, Expression right, Identifier id, Expression args[]) { super(METHOD, where, Type.tError, right, args); this.id = id; } public MethodExpression(long where, Expression right, MemberDefinition field, Expression args[]) { super(METHOD, where, field.getType().getReturnType(), right, args); this.id = field.getName(); this.field = field; this.clazz = field.getClassDefinition(); } // This is a hack used only within certain access methods generated by // 'SourceClass.getAccessMember'. It allows an 'invokespecial' instruction // to be forced even though 'super' does not appear within the call. // Such access methods are needed for access to protected methods when using // the qualified '<class>.super.<method>(...)' notation. public MethodExpression(long where, Expression right, MemberDefinition field, Expression args[], boolean forceSuper) { this(where, right, field, args); this.isSuper = forceSuper; } public Expression getImplementation() { if (implementation != null) return implementation; return this; } /** * Check expression type */ public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable exp) { ClassDeclaration c = null; boolean isArray = false; boolean staticRef = false; // Access method to use if required. MemberDefinition implMethod = null; ClassDefinition ctxClass = ctx.field.getClassDefinition(); // When calling a constructor, we may need to add an // additional argument to transmit the outer instance link. Expression args[] = this.args; if (id.equals(idInit)){ ClassDefinition conCls = ctxClass; try { Expression conOuter = null; if (right instanceof SuperExpression) { // outer.super(...) conCls = conCls.getSuperClass().getClassDefinition(env); conOuter = ((SuperExpression)right).outerArg; } else if (right instanceof ThisExpression) { // outer.this(...) conOuter = ((ThisExpression)right).outerArg; } args = NewInstanceExpression. insertOuterLink(env, ctx, where, conCls, conOuter, args); } catch (ClassNotFound ee) { // the same error is handled elsewhere } } Type argTypes[] = new Type[args.length]; // The effective accessing class, for access checking. // This is normally the immediately enclosing class. ClassDefinition sourceClass = ctxClass; try { if (right == null) { staticRef = ctx.field.isStatic(); // Find the first outer scope that mentions the method. ClassDefinition cdef = ctxClass; MemberDefinition m = null; for (; cdef != null; cdef = cdef.getOuterClass()) { m = cdef.findAnyMethod(env, id); if (m != null) { break; } } if (m == null) { // this is the scope for error diagnosis c = ctx.field.getClassDeclaration(); } else { // found the innermost scope in which m occurs c = cdef.getClassDeclaration(); // Maybe an inherited method hides an apparent method. // Keep looking at enclosing scopes to find out. if (m.getClassDefinition() != cdef) { ClassDefinition cdef2 = cdef; while ((cdef2 = cdef2.getOuterClass()) != null) { MemberDefinition m2 = cdef2.findAnyMethod(env, id); if (m2 != null && m2.getClassDefinition() == cdef2) { env.error(where, "inherited.hides.method", id, cdef.getClassDeclaration(), cdef2.getClassDeclaration()); break; } } } } } else { if (id.equals(idInit)) { int thisN = ctx.getThisNumber(); if (!ctx.field.isConstructor()) { env.error(where, "invalid.constr.invoke"); return vset.addVar(thisN); } // As a consequence of the DA/DU rules in the JLS (draft of // forthcoming 2e), all variables are both definitely assigned // and definitely unassigned in unreachable code. Normally, this // correctly suppresses DA/DU-related errors in such code. // The use of the DA status of the 'this' variable for the extra // check below on correct constructor usage, however, does not quite // fit into this DA/DU scheme. The current representation of // Vsets for unreachable dead-ends, does not allow 'clearVar' // to work, as the DA/DU bits (all on) are implicitly represented // by the fact that the Vset is a dead-end. The DA/DU status // of the 'this' variable is supposed to be temporarily // cleared at the beginning of a constructor and during the // checking of constructor arguments (see below in this method). // Since 'clearVar' has no effect on dead-ends, we may // find the 'this' variable in an erroneously definitely-assigned state. // As a workaround, we suppress the following error message when // the Vset is a dead-end, i.e., when we are in unreachable code. // Unfortunately, the special-case treatment of reachability for // if-then and if-then-else allows unreachable code in some circumstances, // thus it is possible that no error message will be emitted at all. // While this behavior is strictly incorrect (thus we call this a // workaround), the problematic code is indeed unreachable and will // not be executed. In fact, it will be entirely omitted from the // translated program, and can cause no harm at runtime. A correct // solution would require modifying the representation of the DA/DU // analysis to use finite Vsets only, restricting the universe // of variables about which assertions are made (even in unreachable // code) to variables that are actually in scope. Alternatively, the // Vset extension and the dead-end marker (currently a reserved value // of the extension) could be represented orthogonally. In either case, // 'clearVar' could then be made to work on (non-canonical) dead ends. // See file 'Vset.java'. if (!vset.isReallyDeadEnd() && vset.testVar(thisN)) { env.error(where, "constr.invoke.not.first"); return vset; } vset = vset.addVar(thisN); if (right instanceof SuperExpression) { // supers require this specific kind of checking vset = right.checkAmbigName(env, ctx, vset, exp, this); } else { vset = right.checkValue(env, ctx, vset, exp); } } else { vset = right.checkAmbigName(env, ctx, vset, exp, this); if (right.type == Type.tPackage) { FieldExpression.reportFailedPackagePrefix(env, right); return vset; } if (right instanceof TypeExpression) { staticRef = true; } } if (right.type.isType(TC_CLASS)) { c = env.getClassDeclaration(right.type); } else if (right.type.isType(TC_ARRAY)) { isArray = true; c = env.getClassDeclaration(Type.tObject); } else { if (!right.type.isType(TC_ERROR)) { env.error(where, "invalid.method.invoke", right.type); } return vset; } // Normally, the effective accessing class is the innermost // class surrounding the current method call, but, for calls // of the form '<class>.super.<method>(...)', it is <class>. // This allows access to protected members of a superclass // from within a class nested within one of its subclasses. // Otherwise, for example, the call below to 'matchMethod' // may fail due to the rules for visibility of inaccessible // members. For consistency, we treat qualified 'this' in // the same manner, as error diagnostics will be affected. // QUERY: Are there subtle unexplored language issues here? if (right instanceof FieldExpression) { Identifier id = ((FieldExpression)right).id; if (id == idThis) { sourceClass = ((FieldExpression)right).clazz; } else if (id == idSuper) { isSuper = true; sourceClass = ((FieldExpression)right).clazz; } } else if (right instanceof SuperExpression) { isSuper = true; } // Fix for 4158650. When we extend a protected inner // class in a different package, we may not have access // to the type of our superclass. Allow the call to // the superclass constructor from within our constructor // Note that this check does not apply to constructor // calls in new instance expressions -- those are part // of NewInstanceExpression#check(). if (id != idInit) { // Required by JLS 6.6.1. Fixes 4143715. // (See also 4094658.) if (!FieldExpression.isTypeAccessible(where, env, right.type, sourceClass)) { ClassDeclaration cdecl = sourceClass.getClassDeclaration(); if (staticRef) { env.error(where, "no.type.access", id, right.type.toString(), cdecl); } else { env.error(where, "cant.access.member.type", id, right.type.toString(), cdecl); } } } } // Compose a list of argument types boolean hasErrors = false; // "this" is not defined during argument checking if (id.equals(idInit)) { vset = vset.clearVar(ctx.getThisNumber()); } for (int i = 0 ; i < args.length ; i++) { vset = args[i].checkValue(env, ctx, vset, exp); argTypes[i] = args[i].type; hasErrors = hasErrors || argTypes[i].isType(TC_ERROR); } // "this" is defined after the constructor invocation if (id.equals(idInit)) { vset = vset.addVar(ctx.getThisNumber()); } // Check if there are any type errors in the arguments if (hasErrors) { return vset; } // Get the method field, given the argument types clazz = c.getClassDefinition(env); if (field == null) { field = clazz.matchMethod(env, sourceClass, id, argTypes); if (field == null) { if (id.equals(idInit)) { if (diagnoseMismatch(env, args, argTypes)) return vset; String sig = clazz.getName().getName().toString(); sig = Type.tMethod(Type.tError, argTypes).typeString(sig, false, false); env.error(where, "unmatched.constr", sig, c); return vset; } String sig = id.toString(); sig = Type.tMethod(Type.tError, argTypes).typeString(sig, false, false); if (clazz.findAnyMethod(env, id) == null) { if (ctx.getField(env, id) != null) { env.error(where, "invalid.method", id, c); } else { env.error(where, "undef.meth", sig, c); } } else if (diagnoseMismatch(env, args, argTypes)) { } else { env.error(where, "unmatched.meth", sig, c); } return vset; } } type = field.getType().getReturnType(); // Make sure that static references are allowed if (staticRef && !field.isStatic()) { env.error(where, "no.static.meth.access", field, field.getClassDeclaration()); return vset; } if (field.isProtected() && !(right == null) && !(right instanceof SuperExpression // Extension of JLS 6.6.2 for qualified 'super'. || (right instanceof FieldExpression && ((FieldExpression)right).id == idSuper)) && !sourceClass.protectedAccess(env, field, right.type)) { env.error(where, "invalid.protected.method.use", field.getName(), field.getClassDeclaration(), right.type); return vset; } // In <class>.super.<method>(), we cannot simply evaluate // <class>.super to an object reference (as we would for // <class>.super.<field>) and then perform an 'invokespecial'. // An 'invokespecial' must be performed from within (a subclass of) // the class in which the target method is located. if (right instanceof FieldExpression && ((FieldExpression)right).id == idSuper) { if (!field.isPrivate()) { // The private case is handled below. // Use an access method unless the effective accessing class // (the class qualifying the 'super') is the same as the // immediately enclosing class, i.e., the qualification was // unnecessary. if (sourceClass != ctxClass) { implMethod = sourceClass.getAccessMember(env, ctx, field, true); } } } // Access method for private field if not in the same class. if (implMethod == null && field.isPrivate()) { ClassDefinition cdef = field.getClassDefinition(); if (cdef != ctxClass) { implMethod = cdef.getAccessMember(env, ctx, field, false); } } // Make sure that we are not invoking an abstract method if (field.isAbstract() && (right != null) && (right.op == SUPER)) { env.error(where, "invoke.abstract", field, field.getClassDeclaration()); return vset; } if (field.reportDeprecated(env)) { if (field.isConstructor()) { env.error(where, "warn.constr.is.deprecated", field); } else { env.error(where, "warn.meth.is.deprecated", field, field.getClassDefinition()); } } // Check for recursive constructor if (field.isConstructor() && ctx.field.equals(field)) { env.error(where, "recursive.constr", field); } // When a package-private class defines public or protected // members, those members may sometimes be accessed from // outside of the package in public subclasses. In these // cases, we need to massage the method call to refer to // to an accessible subclass rather than the package-private // parent class. Part of fix for 4135692. // Find out if the class which contains this method // call has access to the class which declares the // public or protected method referent. // We don't perform this translation on constructor calls. if (sourceClass == ctxClass) { ClassDefinition declarer = field.getClassDefinition(); if (!field.isConstructor() && declarer.isPackagePrivate() && !declarer.getName().getQualifier() .equals(sourceClass.getName().getQualifier())) { //System.out.println("The access of member " + // field + " declared in class " + // declarer + // " is not allowed by the VM from class " + // accessor + // ". Replacing with an access of class " + // clazz); // We cannot make this access at the VM level. // Construct a member which will stand for this // method in clazz and set `field' to refer to it. field = MemberDefinition.makeProxyMember(field, clazz, env); } } sourceClass.addDependency(field.getClassDeclaration()); if (sourceClass != ctxClass) { ctxClass.addDependency(field.getClassDeclaration()); } } catch (ClassNotFound ee) { env.error(where, "class.not.found", ee.name, ctx.field); return vset; } catch (AmbiguousMember ee) { env.error(where, "ambig.field", id, ee.field1, ee.field2); return vset; } // Make sure it is qualified if ((right == null) && !field.isStatic()) { right = ctx.findOuterLink(env, where, field); vset = right.checkValue(env, ctx, vset, exp); } // Cast arguments argTypes = field.getType().getArgumentTypes(); for (int i = 0 ; i < args.length ; i++) { args[i] = convert(env, ctx, argTypes[i], args[i]); } if (field.isConstructor()) { MemberDefinition m = field; if (implMethod != null) { m = implMethod; } int nargs = args.length; Expression[] newargs = args; if (nargs > this.args.length) { // Argument was added above. // Maintain the model for hidden outer args in outer.super(...): Expression rightI; if (right instanceof SuperExpression) { rightI = new SuperExpression(right.where, ctx); ((SuperExpression)right).outerArg = args[0]; } else if (right instanceof ThisExpression) { rightI = new ThisExpression(right.where, ctx); } else { throw new CompilerError("this.init"); } if (implMethod != null) { // Need dummy argument for access method. // Dummy argument follows outer instance link. // Leave 'this.args' equal to 'newargs' but // without the outer instance link. newargs = new Expression[nargs+1]; this.args = new Expression[nargs]; newargs[0] = args[0]; // outer instance this.args[0] = newargs[1] = new NullExpression(where); // dummy argument for (int i = 1 ; i < nargs ; i++) { this.args[i] = newargs[i+1] = args[i]; } } else { // Strip outer instance link from 'this.args'. // ASSERT(this.arg.length == nargs-1); for (int i = 1 ; i < nargs ; i++) { this.args[i-1] = args[i]; } } implementation = new MethodExpression(where, rightI, m, newargs); implementation.type = type; // Is this needed? } else { // No argument was added.Lines 1–500 of 949. 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/* * Copyright (c) 1994, 2003, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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. */ package sun.tools.tree; import sun.tools.java.*; import sun.tools.asm.Assembler; import java.io.PrintStream; import java.util.Hashtable; /** * WARNING: The contents of this source file are not part of any * supported API. Code that depends on them does so at its own risk: * they are subject to change or removal without notice. */ public class MethodExpression extends NaryExpression { Identifier id; ClassDefinition clazz; // The class in which the called method is defined MemberDefinition field; Expression implementation; private boolean isSuper; // Set if qualified by 'super' or '<class>.super'. /** * constructor */ public MethodExpression(long where, Expression right, Identifier id, Expression args[]) { super(METHOD, where, Type.tError, right, args); this.id = id; } public MethodExpression(long where, Expression right, MemberDefinition field, Expression args[]) { super(METHOD, where, field.getType().getReturnType(), right, args); this.id = field.getName(); this.field = field; this.clazz = field.getClassDefinition(); } // This is a hack used only within certain access methods generated by // 'SourceClass.getAccessMember'. It allows an 'invokespecial' instruction // to be forced even though 'super' does not appear within the call. // Such access methods are needed for access to protected methods when using // the qualified '<class>.super.<method>(...)' notation. public MethodExpression(long where, Expression right, MemberDefinition field, Expression args[], boolean forceSuper) { this(where, right, field, args); this.isSuper = forceSuper; } public Expression getImplementation() { if (implementation != null) return implementation; return this; } /** * Check expression type */ public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable exp) { ClassDeclaration c = null; boolean isArray = false; boolean staticRef = false; // Access method to use if required. MemberDefinition implMethod = null; ClassDefinition ctxClass = ctx.field.getClassDefinition(); // When calling a constructor, we may need to add an // additional argument to transmit the outer instance link. Expression args[] = this.args; if (id.equals(idInit)){ ClassDefinition conCls = ctxClass; try { Expression conOuter = null; if (right instanceof SuperExpression) { // outer.super(...) conCls = conCls.getSuperClass().getClassDefinition(env); conOuter = ((SuperExpression)right).outerArg; } else if (right instanceof ThisExpression) { // outer.this(...) conOuter = ((ThisExpression)right).outerArg; } args = NewInstanceExpression. insertOuterLink(env, ctx, where, conCls, conOuter, args); } catch (ClassNotFound ee) { // the same error is handled elsewhere } } Type argTypes[] = new Type[args.length]; // The effective accessing class, for access checking. // This is normally the immediately enclosing class. ClassDefinition sourceClass = ctxClass; try { if (right == null) { staticRef = ctx.field.isStatic(); // Find the first outer scope that mentions the method. ClassDefinition cdef = ctxClass; MemberDefinition m = null; for (; cdef != null; cdef = cdef.getOuterClass()) { m = cdef.findAnyMethod(env, id); if (m != null) { break; } } if (m == null) { // this is the scope for error diagnosis c = ctx.field.getClassDeclaration(); } else { // found the innermost scope in which m occurs c = cdef.getClassDeclaration(); // Maybe an inherited method hides an apparent method. // Keep looking at enclosing scopes to find out. if (m.getClassDefinition() != cdef) { ClassDefinition cdef2 = cdef; while ((cdef2 = cdef2.getOuterClass()) != null) { MemberDefinition m2 = cdef2.findAnyMethod(env, id); if (m2 != null && m2.getClassDefinition() == cdef2) { env.error(where, "inherited.hides.method", id, cdef.getClassDeclaration(), cdef2.getClassDeclaration()); break; } } } } } else { if (id.equals(idInit)) { int thisN = ctx.getThisNumber(); if (!ctx.field.isConstructor()) { env.error(where, "invalid.constr.invoke"); return vset.addVar(thisN); } // As a consequence of the DA/DU rules in the JLS (draft of // forthcoming 2e), all variables are both definitely assigned // and definitely unassigned in unreachable code. Normally, this // correctly suppresses DA/DU-related errors in such code. // The use of the DA status of the 'this' variable for the extra // check below on correct constructor usage, however, does not quite // fit into this DA/DU scheme. The current representation of // Vsets for unreachable dead-ends, does not allow 'clearVar' // to work, as the DA/DU bits (all on) are implicitly represented // by the fact that the Vset is a dead-end. The DA/DU status // of the 'this' variable is supposed to be temporarily // cleared at the beginning of a constructor and during the // checking of constructor arguments (see below in this method). // Since 'clearVar' has no effect on dead-ends, we may // find the 'this' variable in an erroneously definitely-assigned state. // As a workaround, we suppress the following error message when // the Vset is a dead-end, i.e., when we are in unreachable code. // Unfortunately, the special-case treatment of reachability for // if-then and if-then-else allows unreachable code in some circumstances, // thus it is possible that no error message will be emitted at all. // While this behavior is strictly incorrect (thus we call this a // workaround), the problematic code is indeed unreachable and will // not be executed. In fact, it will be entirely omitted from the // translated program, and can cause no harm at runtime. A correct // solution would require modifying the representation of the DA/DU // analysis to use finite Vsets only, restricting the universe // of variables about which assertions are made (even in unreachable // code) to variables that are actually in scope. Alternatively, the // Vset extension and the dead-end marker (currently a reserved value // of the extension) could be represented orthogonally. In either case, // 'clearVar' could then be made to work on (non-canonical) dead ends. // See file 'Vset.java'. if (!vset.isReallyDeadEnd() && vset.testVar(thisN)) { env.error(where, "constr.invoke.not.first"); return vset; } vset = vset.addVar(thisN); if (right instanceof SuperExpression) { // supers require this specific kind of checking vset = right.checkAmbigName(env, ctx, vset, exp, this); } else { vset = right.checkValue(env, ctx, vset, exp); } } else { vset = right.checkAmbigName(env, ctx, vset, exp, this); if (right.type == Type.tPackage) { FieldExpression.reportFailedPackagePrefix(env, right); return vset; } if (right instanceof TypeExpression) { staticRef = true; } } if (right.type.isType(TC_CLASS)) { c = env.getClassDeclaration(right.type); } else if (right.type.isType(TC_ARRAY)) { isArray = true; c = env.getClassDeclaration(Type.tObject); } else { if (!right.type.isType(TC_ERROR)) { env.error(where, "invalid.method.invoke", right.type); } return vset; } // Normally, the effective accessing class is the innermost // class surrounding the current method call, but, for calls // of the form '<class>.super.<method>(...)', it is <class>. // This allows access to protected members of a superclass // from within a class nested within one of its subclasses. // Otherwise, for example, the call below to 'matchMethod' // may fail due to the rules for visibility of inaccessible // members. For consistency, we treat qualified 'this' in // the same manner, as error diagnostics will be affected. // QUERY: Are there subtle unexplored language issues here? if (right instanceof FieldExpression) { Identifier id = ((FieldExpression)right).id; if (id == idThis) { sourceClass = ((FieldExpression)right).clazz; } else if (id == idSuper) { isSuper = true; sourceClass = ((FieldExpression)right).clazz; } } else if (right instanceof SuperExpression) { isSuper = true; } // Fix for 4158650. When we extend a protected inner // class in a different package, we may not have access // to the type of our superclass. Allow the call to // the superclass constructor from within our constructor // Note that this check does not apply to constructor // calls in new instance expressions -- those are part // of NewInstanceExpression#check(). if (id != idInit) { // Required by JLS 6.6.1. Fixes 4143715. // (See also 4094658.) if (!FieldExpression.isTypeAccessible(where, env, right.type, sourceClass)) { ClassDeclaration cdecl = sourceClass.getClassDeclaration(); if (staticRef) { env.error(where, "no.type.access", id, right.type.toString(), cdecl); } else { env.error(where, "cant.access.member.type", id, right.type.toString(), cdecl); } } } } // Compose a list of argument types boolean hasErrors = false; // "this" is not defined during argument checking if (id.equals(idInit)) { vset = vset.clearVar(ctx.getThisNumber()); } for (int i = 0 ; i < args.length ; i++) { vset = args[i].checkValue(env, ctx, vset, exp); argTypes[i] = args[i].type; hasErrors = hasErrors || argTypes[i].isType(TC_ERROR); } // "this" is defined after the constructor invocation if (id.equals(idInit)) { vset = vset.addVar(ctx.getThisNumber()); } // Check if there are any type errors in the arguments if (hasErrors) { return vset; } // Get the method field, given the argument types clazz = c.getClassDefinition(env); if (field == null) { field = clazz.matchMethod(env, sourceClass, id, argTypes); if (field == null) { if (id.equals(idInit)) { if (diagnoseMismatch(env, args, argTypes)) return vset; String sig = clazz.getName().getName().toString(); sig = Type.tMethod(Type.tError, argTypes).typeString(sig, false, false); env.error(where, "unmatched.constr", sig, c); return vset; } String sig = id.toString(); sig = Type.tMethod(Type.tError, argTypes).typeString(sig, false, false); if (clazz.findAnyMethod(env, id) == null) { if (ctx.getField(env, id) != null) { env.error(where, "invalid.method", id, c); } else { env.error(where, "undef.meth", sig, c); } } else if (diagnoseMismatch(env, args, argTypes)) { } else { env.error(where, "unmatched.meth", sig, c); } return vset; } } type = field.getType().getReturnType(); // Make sure that static references are allowed if (staticRef && !field.isStatic()) { env.error(where, "no.static.meth.access", field, field.getClassDeclaration()); return vset; } if (field.isProtected() && !(right == null) && !(right instanceof SuperExpression // Extension of JLS 6.6.2 for qualified 'super'. || (right instanceof FieldExpression && ((FieldExpression)right).id == idSuper)) && !sourceClass.protectedAccess(env, field, right.type)) { env.error(where, "invalid.protected.method.use", field.getName(), field.getClassDeclaration(), right.type); return vset; } // In <class>.super.<method>(), we cannot simply evaluate // <class>.super to an object reference (as we would for // <class>.super.<field>) and then perform an 'invokespecial'. // An 'invokespecial' must be performed from within (a subclass of) // the class in which the target method is located. if (right instanceof FieldExpression && ((FieldExpression)right).id == idSuper) { if (!field.isPrivate()) { // The private case is handled below. // Use an access method unless the effective accessing class // (the class qualifying the 'super') is the same as the // immediately enclosing class, i.e., the qualification was // unnecessary. if (sourceClass != ctxClass) { implMethod = sourceClass.getAccessMember(env, ctx, field, true); } } } // Access method for private field if not in the same class. if (implMethod == null && field.isPrivate()) { ClassDefinition cdef = field.getClassDefinition(); if (cdef != ctxClass) { implMethod = cdef.getAccessMember(env, ctx, field, false); } } // Make sure that we are not invoking an abstract method if (field.isAbstract() && (right != null) && (right.op == SUPER)) { env.error(where, "invoke.abstract", field, field.getClassDeclaration()); return vset; } if (field.reportDeprecated(env)) { if (field.isConstructor()) { env.error(where, "warn.constr.is.deprecated", field); } else { env.error(where, "warn.meth.is.deprecated", field, field.getClassDefinition()); } } // Check for recursive constructor if (field.isConstructor() && ctx.field.equals(field)) { env.error(where, "recursive.constr", field); } // When a package-private class defines public or protected // members, those members may sometimes be accessed from // outside of the package in public subclasses. In these // cases, we need to massage the method call to refer to // to an accessible subclass rather than the package-private // parent class. Part of fix for 4135692. // Find out if the class which contains this method // call has access to the class which declares the // public or protected method referent. // We don't perform this translation on constructor calls. if (sourceClass == ctxClass) { ClassDefinition declarer = field.getClassDefinition(); if (!field.isConstructor() && declarer.isPackagePrivate() && !declarer.getName().getQualifier() .equals(sourceClass.getName().getQualifier())) { //System.out.println("The access of member " + // field + " declared in class " + // declarer + // " is not allowed by the VM from class " + // accessor + // ". Replacing with an access of class " + // clazz); // We cannot make this access at the VM level. // Construct a member which will stand for this // method in clazz and set `field' to refer to it. field = MemberDefinition.makeProxyMember(field, clazz, env); } } sourceClass.addDependency(field.getClassDeclaration()); if (sourceClass != ctxClass) { ctxClass.addDependency(field.getClassDeclaration()); } } catch (ClassNotFound ee) { env.error(where, "class.not.found", ee.name, ctx.field); return vset; } catch (AmbiguousMember ee) { env.error(where, "ambig.field", id, ee.field1, ee.field2); return vset; } // Make sure it is qualified if ((right == null) && !field.isStatic()) { right = ctx.findOuterLink(env, where, field); vset = right.checkValue(env, ctx, vset, exp); } // Cast arguments argTypes = field.getType().getArgumentTypes(); for (int i = 0 ; i < args.length ; i++) { args[i] = convert(env, ctx, argTypes[i], args[i]); } if (field.isConstructor()) { MemberDefinition m = field; if (implMethod != null) { m = implMethod; } int nargs = args.length; Expression[] newargs = args; if (nargs > this.args.length) { // Argument was added above. // Maintain the model for hidden outer args in outer.super(...): Expression rightI; if (right instanceof SuperExpression) { rightI = new SuperExpression(right.where, ctx); ((SuperExpression)right).outerArg = args[0]; } else if (right instanceof ThisExpression) { rightI = new ThisExpression(right.where, ctx); } else { throw new CompilerError("this.init"); } if (implMethod != null) { // Need dummy argument for access method. // Dummy argument follows outer instance link. // Leave 'this.args' equal to 'newargs' but // without the outer instance link. newargs = new Expression[nargs+1]; this.args = new Expression[nargs]; newargs[0] = args[0]; // outer instance this.args[0] = newargs[1] = new NullExpression(where); // dummy argument for (int i = 1 ; i < nargs ; i++) { this.args[i] = newargs[i+1] = args[i]; } } else { // Strip outer instance link from 'this.args'. // ASSERT(this.arg.length == nargs-1); for (int i = 1 ; i < nargs ; i++) { this.args[i-1] = args[i]; } } implementation = new MethodExpression(where, rightI, m, newargs); implementation.type = type; // Is this needed? } else { // No argument was added.