jdk8-mips64-public/hotspot: src/share/vm/classfile/genericSignatures.cpp@01522ca68fc7 (annotated)

src/share/vm/classfile/genericSignatures.cpp@01522ca68fc7 (annotated)

src/share/vm/classfile/genericSignatures.cpp

Tue, 18 Jun 2013 12:31:07 -0700

author: johnc
date: Tue, 18 Jun 2013 12:31:07 -0700
changeset 5277: 01522ca68fc7
parent 4960: 41ed397cc0cd
child 5259: ef57c43512d6
permissions: -rw-r--r--

8015237: Parallelize string table scanning during strong root processing
Summary: Parallelize the scanning of the intern string table by having each GC worker claim a given number of buckets. Changes were also reviewed by Per Liden <per.liden@oracle.com>.
Reviewed-by: tschatzl, stefank, twisti

 /*
  * Copyright (c) 2012, 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/genericSignatures.hpp"
 #include "classfile/symbolTable.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "memory/resourceArea.hpp"
 namespace generic {
 // Helper class for parsing the generic signature Symbol in klass and methods
 class DescriptorStream : public ResourceObj {
  private:
   Symbol* _symbol;
   int _offset;
   int _mark;
   const char* _parse_error;
   void set_parse_error(const char* error) {
     assert(error != NULL, "Can't set NULL error string");
     _parse_error = error;
   }
  public:
   DescriptorStream(Symbol* sym)
       : _symbol(sym), _offset(0), _mark(-1), _parse_error(NULL) {}
   const char* parse_error() const {
     return _parse_error;
   }
   bool at_end() { return _offset >= _symbol->utf8_length(); }
   char peek() {
     if (at_end()) {
       set_parse_error("Peeking past end of signature");
       return '\0';
     } else {
       return _symbol->byte_at(_offset);
     }
   }
   char read() {
     if (at_end()) {
       set_parse_error("Reading past end of signature");
       return '\0';
     } else {
       return _symbol->byte_at(_offset++);
     }
   }
   void read(char expected) {
     char c = read();
     assert_char(c, expected, 0);
   }
   void assert_char(char c, char expected, int pos = -1) {
     if (c != expected) {
       const char* fmt = "Parse error at %d: expected %c but got %c";
       size_t len = strlen(fmt) + 5;
       char* buffer = NEW_RESOURCE_ARRAY(char, len);
       jio_snprintf(buffer, len, fmt, _offset + pos, expected, c);
       set_parse_error(buffer);
     }
   }
   void push(char c) {
     assert(c == _symbol->byte_at(_offset - 1), "Pushing back wrong value");
     --_offset;
   }
   void expect_end() {
     if (!at_end()) {
       set_parse_error("Unexpected data trailing signature");
     }
   }
   bool has_mark() { return _mark != -1; }
   void set_mark() {
     _mark = _offset;
   }
   Identifier* identifier_from_mark() {
     assert(has_mark(), "Mark should be set");
     if (!has_mark()) {
       set_parse_error("Expected mark to be set");
       return NULL;
     } else {
       Identifier* id = new Identifier(_symbol, _mark, _offset - 1);
       _mark = -1;
       return id;
     }
   }
 };
 #define CHECK_FOR_PARSE_ERROR()         \
   if (STREAM->parse_error() != NULL) {   \
     if (VerifyGenericSignatures) {      \
       fatal(STREAM->parse_error());      \
     }                                   \
     return NULL;                        \
   } 0
 #define READ() STREAM->read(); CHECK_FOR_PARSE_ERROR()
 #define PEEK() STREAM->peek(); CHECK_FOR_PARSE_ERROR()
 #define PUSH(c) STREAM->push(c)
 #define EXPECT(c) STREAM->read(c); CHECK_FOR_PARSE_ERROR()
 #define EXPECTED(c, ch) STREAM->assert_char(c, ch); CHECK_FOR_PARSE_ERROR()
 #define EXPECT_END() STREAM->expect_end(); CHECK_FOR_PARSE_ERROR()
 #define CHECK_STREAM STREAM); CHECK_FOR_PARSE_ERROR(); (0
 #ifndef PRODUCT
 void Identifier::print_on(outputStream* str) const {
   for (int i = _begin; i < _end; ++i) {
     str->print("%c", (char)_sym->byte_at(i));
   }
 }
 #endif // ndef PRODUCT
 bool Identifier::equals(Identifier* other) {
   if (_sym == other->_sym && _begin == other->_begin && _end == other->_end) {
     return true;
   } else if (_end - _begin != other->_end - other->_begin) {
     return false;
   } else {
     size_t len = _end - _begin;
     char* addr = ((char*)_sym->bytes()) + _begin;
     char* oaddr = ((char*)other->_sym->bytes()) + other->_begin;
     return strncmp(addr, oaddr, len) == 0;
   }
 }
 bool Identifier::equals(Symbol* sym) {
   Identifier id(sym, 0, sym->utf8_length());
   return equals(&id);
 }
 /**
  * A formal type parameter may be found in the the enclosing class, but it could
  * also come from an enclosing method or outer class, in the case of inner-outer
  * classes or anonymous classes.  For example:
  *
  * class Outer<T,V> {
  *   class Inner<W> {
  *     void m(T t, V v, W w);
  *   }
  * }
  *
  * In this case, the type variables in m()'s signature are not all found in the
  * immediate enclosing class (Inner).  class Inner has only type parameter W,
  * but it's outer_class field will reference Outer's descriptor which contains
  * T & V (no outer_method in this case).
  *
  * If you have an anonymous class, it has both an enclosing method *and* an
  * enclosing class where type parameters can be declared:
  *
  * class MOuter<T> {
  *   <V> void bar(V v) {
  *     Runnable r = new Runnable() {
  *       public void run() {}
  *       public void foo(T t, V v) { ... }
  *     };
  *   }
  * }
  *
  * In this case, foo will be a member of some class, Runnable$1, which has no
  * formal parameters itself, but has an outer_method (bar()) which provides
  * type parameter V, and an outer class MOuter with type parameter T.
  *
  * It is also possible that the outer class is itself an inner class to some
  * other class (or an anonymous class with an enclosing method), so we need to
  * follow the outer_class/outer_method chain to it's end when looking for a
  * type parameter.
  */
 TypeParameter* Descriptor::find_type_parameter(Identifier* id, int* depth) {
   int current_depth = 0;
   MethodDescriptor* outer_method = as_method_signature();
   ClassDescriptor* outer_class = as_class_signature();
   if (outer_class == NULL) { // 'this' is a method signature; use the holder
     outer_class = outer_method->outer_class();
   }
   while (outer_method != NULL || outer_class != NULL) {
     if (outer_method != NULL) {
       for (int i = 0; i < outer_method->type_parameters().length(); ++i) {
         TypeParameter* p = outer_method->type_parameters().at(i);
         if (p->identifier()->equals(id)) {
           *depth = -1; // indicates this this is a method parameter
           return p;
         }
       }
     }
     if (outer_class != NULL) {
       for (int i = 0; i < outer_class->type_parameters().length(); ++i) {
         TypeParameter* p = outer_class->type_parameters().at(i);
         if (p->identifier()->equals(id)) {
           *depth = current_depth;
           return p;
         }
       }
       outer_method = outer_class->outer_method();
       outer_class = outer_class->outer_class();
       ++current_depth;
     }
   }
   if (VerifyGenericSignatures) {
     fatal("Could not resolve identifier");
   }
   return NULL;
 }
 ClassDescriptor* ClassDescriptor::parse_generic_signature(Klass* klass, TRAPS) {
   return parse_generic_signature(klass, NULL, CHECK_NULL);
 }
 ClassDescriptor* ClassDescriptor::parse_generic_signature(
       Klass* klass, Symbol* original_name, TRAPS) {
   InstanceKlass* ik = InstanceKlass::cast(klass);
   Symbol* sym = ik->generic_signature();
   ClassDescriptor* spec;
   if (sym == NULL || (spec = ClassDescriptor::parse_generic_signature(sym)) == NULL) {
     spec = ClassDescriptor::placeholder(ik);
   }
   u2 outer_index = get_outer_class_index(ik, CHECK_NULL);
   if (outer_index != 0) {
     if (original_name == NULL) {
       original_name = ik->name();
     }
     Handle class_loader = Handle(THREAD, ik->class_loader());
     Handle protection_domain = Handle(THREAD, ik->protection_domain());
     Symbol* outer_name = ik->constants()->klass_name_at(outer_index);
     Klass* outer = SystemDictionary::find(
         outer_name, class_loader, protection_domain, CHECK_NULL);
     if (outer == NULL && !THREAD->is_Compiler_thread()) {
       if (outer_name == ik->super()->name()) {
         outer = SystemDictionary::resolve_super_or_fail(original_name, outer_name,
                                                         class_loader, protection_domain,
                                                         false, CHECK_NULL);
       }
       else {
         outer = SystemDictionary::resolve_or_fail(outer_name, class_loader,
                                                   protection_domain, false, CHECK_NULL);
       }
     }
     InstanceKlass* outer_ik;
     ClassDescriptor* outer_spec = NULL;
     if (outer == NULL) {
       outer_spec = ClassDescriptor::placeholder(ik);
       assert(false, "Outer class not loaded and not loadable from here");
     } else {
       outer_ik = InstanceKlass::cast(outer);
       outer_spec = parse_generic_signature(outer, original_name, CHECK_NULL);
     }
     spec->set_outer_class(outer_spec);
     u2 encl_method_idx = ik->enclosing_method_method_index();
     if (encl_method_idx != 0 && outer_ik != NULL) {
       ConstantPool* cp = ik->constants();
       u2 name_index = cp->name_ref_index_at(encl_method_idx);
       u2 sig_index = cp->signature_ref_index_at(encl_method_idx);
       Symbol* name = cp->symbol_at(name_index);
       Symbol* sig = cp->symbol_at(sig_index);
       Method* m = outer_ik->find_method(name, sig);
       if (m != NULL) {
         Symbol* gsig = m->generic_signature();
         if (gsig != NULL) {
           MethodDescriptor* gms = MethodDescriptor::parse_generic_signature(gsig, outer_spec);
           spec->set_outer_method(gms);
         }
       } else if (VerifyGenericSignatures) {
         ResourceMark rm;
         stringStream ss;
         ss.print("Could not find method %s %s in class %s",
           name->as_C_string(), sig->as_C_string(), outer_name->as_C_string());
         fatal(ss.as_string());
       }
     }
   }
   spec->bind_variables_to_parameters();
   return spec;
 }
 ClassDescriptor* ClassDescriptor::placeholder(InstanceKlass* klass) {
   GrowableArray<TypeParameter*> formals;
   GrowableArray<ClassType*> interfaces;
   ClassType* super_type = NULL;
   Klass* super_klass = klass->super();
   if (super_klass != NULL) {
     InstanceKlass* super = InstanceKlass::cast(super_klass);
     super_type = ClassType::from_symbol(super->name());
   }
   for (int i = 0; i < klass->local_interfaces()->length(); ++i) {
     InstanceKlass* iface = InstanceKlass::cast(klass->local_interfaces()->at(i));
     interfaces.append(ClassType::from_symbol(iface->name()));
   }
   return new ClassDescriptor(formals, super_type, interfaces);
 }
 ClassDescriptor* ClassDescriptor::parse_generic_signature(Symbol* sym) {
   DescriptorStream ds(sym);
   DescriptorStream* STREAM = &ds;
   GrowableArray<TypeParameter*> parameters(8);
   char c = READ();
   if (c == '<') {
     c = READ();
     while (c != '>') {
       PUSH(c);
       TypeParameter* ftp = TypeParameter::parse_generic_signature(CHECK_STREAM);
       parameters.append(ftp);
       c = READ();
     }
   } else {
     PUSH(c);
   }
   EXPECT('L');
   ClassType* super = ClassType::parse_generic_signature(CHECK_STREAM);
   GrowableArray<ClassType*> signatures(2);
   while (!STREAM->at_end()) {
     EXPECT('L');
     ClassType* iface = ClassType::parse_generic_signature(CHECK_STREAM);
     signatures.append(iface);
   }
   EXPECT_END();
   return new ClassDescriptor(parameters, super, signatures);
 }
 #ifndef PRODUCT
 void ClassDescriptor::print_on(outputStream* str) const {
   str->indent().print_cr("ClassDescriptor {");
   {
     streamIndentor si(str);
     if (_type_parameters.length() > 0) {
       str->indent().print_cr("Formals {");
       {
         streamIndentor si(str);
         for (int i = 0; i < _type_parameters.length(); ++i) {
           _type_parameters.at(i)->print_on(str);
         }
       }
       str->indent().print_cr("}");
     }
     if (_super != NULL) {
       str->indent().print_cr("Superclass: ");
       {
         streamIndentor si(str);
         _super->print_on(str);
       }
     }
     if (_interfaces.length() > 0) {
       str->indent().print_cr("SuperInterfaces: {");
       {
         streamIndentor si(str);
         for (int i = 0; i < _interfaces.length(); ++i) {
           _interfaces.at(i)->print_on(str);
         }
       }
       str->indent().print_cr("}");
     }
     if (_outer_method != NULL) {
       str->indent().print_cr("Outer Method: {");
       {
         streamIndentor si(str);
         _outer_method->print_on(str);
       }
       str->indent().print_cr("}");
     }
     if (_outer_class != NULL) {
       str->indent().print_cr("Outer Class: {");
       {
         streamIndentor si(str);
         _outer_class->print_on(str);
       }
       str->indent().print_cr("}");
     }
   }
   str->indent().print_cr("}");
 }
 #endif // ndef PRODUCT
 ClassType* ClassDescriptor::interface_desc(Symbol* sym) {
   for (int i = 0; i < _interfaces.length(); ++i) {
     if (_interfaces.at(i)->identifier()->equals(sym)) {
       return _interfaces.at(i);
     }
   }
   if (VerifyGenericSignatures) {
     fatal("Did not find expected interface");
   }
   return NULL;
 }
 void ClassDescriptor::bind_variables_to_parameters() {
   if (_outer_class != NULL) {
     _outer_class->bind_variables_to_parameters();
   }
   if (_outer_method != NULL) {
     _outer_method->bind_variables_to_parameters();
   }
   for (int i = 0; i < _type_parameters.length(); ++i) {
     _type_parameters.at(i)->bind_variables_to_parameters(this, i);
   }
   if (_super != NULL) {
     _super->bind_variables_to_parameters(this);
   }
   for (int i = 0; i < _interfaces.length(); ++i) {
     _interfaces.at(i)->bind_variables_to_parameters(this);
   }
 }
 ClassDescriptor* ClassDescriptor::canonicalize(Context* ctx) {
   GrowableArray<TypeParameter*> type_params(_type_parameters.length());
   for (int i = 0; i < _type_parameters.length(); ++i) {
     type_params.append(_type_parameters.at(i)->canonicalize(ctx, 0));
   }
   ClassDescriptor* outer = _outer_class == NULL ? NULL :
       _outer_class->canonicalize(ctx);
   ClassType* super = _super == NULL ? NULL : _super->canonicalize(ctx, 0);
   GrowableArray<ClassType*> interfaces(_interfaces.length());
   for (int i = 0; i < _interfaces.length(); ++i) {
     interfaces.append(_interfaces.at(i)->canonicalize(ctx, 0));
   }
   MethodDescriptor* md = _outer_method == NULL ? NULL :
       _outer_method->canonicalize(ctx);
   return new ClassDescriptor(type_params, super, interfaces, outer, md);
 }
 u2 ClassDescriptor::get_outer_class_index(InstanceKlass* klass, TRAPS) {
   int inner_index = InstanceKlass::inner_class_inner_class_info_offset;
   int outer_index = InstanceKlass::inner_class_outer_class_info_offset;
   int name_offset = InstanceKlass::inner_class_inner_name_offset;
   int next_offset = InstanceKlass::inner_class_next_offset;
   if (klass->inner_classes() == NULL || klass->inner_classes()->length() == 0) {
     // No inner class info => no declaring class
     return 0;
   }
   Array<u2>* i_icls = klass->inner_classes();
   ConstantPool* i_cp = klass->constants();
   int i_length = i_icls->length();
   // Find inner_klass attribute
   for (int i = 0; i + next_offset < i_length; i += next_offset) {
     u2 ioff = i_icls->at(i + inner_index);
     u2 ooff = i_icls->at(i + outer_index);
     u2 noff = i_icls->at(i + name_offset);
     if (ioff != 0) {
       // Check to see if the name matches the class we're looking for
       // before attempting to find the class.
       if (i_cp->klass_name_at_matches(klass, ioff) && ooff != 0) {
         return ooff;
       }
     }
   }
   // It may be anonymous; try for that.
   u2 encl_method_class_idx = klass->enclosing_method_class_index();
   if (encl_method_class_idx != 0) {
     return encl_method_class_idx;
   }
   return 0;
 }
 MethodDescriptor* MethodDescriptor::parse_generic_signature(Method* m, ClassDescriptor* outer) {
   Symbol* generic_sig = m->generic_signature();
   MethodDescriptor* md = NULL;
   if (generic_sig == NULL || (md = parse_generic_signature(generic_sig, outer)) == NULL) {
     md = parse_generic_signature(m->signature(), outer);
   }
   assert(md != NULL, "Could not parse method signature");
   md->bind_variables_to_parameters();
   return md;
 }
 MethodDescriptor* MethodDescriptor::parse_generic_signature(Symbol* sym, ClassDescriptor* outer) {
   DescriptorStream ds(sym);
   DescriptorStream* STREAM = &ds;
   GrowableArray<TypeParameter*> params(8);
   char c = READ();
   if (c == '<') {
     c = READ();
     while (c != '>') {
       PUSH(c);
       TypeParameter* ftp = TypeParameter::parse_generic_signature(CHECK_STREAM);
       params.append(ftp);
       c = READ();
     }
   } else {
     PUSH(c);
   }
   EXPECT('(');
   GrowableArray<Type*> parameters(8);
   c = READ();
   while (c != ')') {
     PUSH(c);
     Type* arg = Type::parse_generic_signature(CHECK_STREAM);
     parameters.append(arg);
     c = READ();
   }
   Type* rt = Type::parse_generic_signature(CHECK_STREAM);
   GrowableArray<Type*> throws;
   while (!STREAM->at_end()) {
     EXPECT('^');
     Type* spec = Type::parse_generic_signature(CHECK_STREAM);
     throws.append(spec);
   }
   return new MethodDescriptor(params, outer, parameters, rt, throws);
 }
 void MethodDescriptor::bind_variables_to_parameters() {
   for (int i = 0; i < _type_parameters.length(); ++i) {
     _type_parameters.at(i)->bind_variables_to_parameters(this, i);
   }
   for (int i = 0; i < _parameters.length(); ++i) {
     _parameters.at(i)->bind_variables_to_parameters(this);
   }
   _return_type->bind_variables_to_parameters(this);
   for (int i = 0; i < _throws.length(); ++i) {
     _throws.at(i)->bind_variables_to_parameters(this);
   }
 }
 bool MethodDescriptor::covariant_match(MethodDescriptor* other, Context* ctx) {
   if (_parameters.length() == other->_parameters.length()) {
     for (int i = 0; i < _parameters.length(); ++i) {
       if (!_parameters.at(i)->covariant_match(other->_parameters.at(i), ctx)) {
         return false;
       }
     }
     if (_return_type->as_primitive() != NULL) {
       return _return_type->covariant_match(other->_return_type, ctx);
     } else {
       // return type is a reference
       return other->_return_type->as_class() != NULL ||
              other->_return_type->as_variable() != NULL ||
              other->_return_type->as_array() != NULL;
     }
   } else {
     return false;
   }
 }
 MethodDescriptor* MethodDescriptor::canonicalize(Context* ctx) {
   GrowableArray<TypeParameter*> type_params(_type_parameters.length());
   for (int i = 0; i < _type_parameters.length(); ++i) {
     type_params.append(_type_parameters.at(i)->canonicalize(ctx, 0));
   }
   ClassDescriptor* outer = _outer_class == NULL ? NULL :
       _outer_class->canonicalize(ctx);
   GrowableArray<Type*> params(_parameters.length());
   for (int i = 0; i < _parameters.length(); ++i) {
     params.append(_parameters.at(i)->canonicalize(ctx, 0));
   }
   Type* rt = _return_type->canonicalize(ctx, 0);
   GrowableArray<Type*> throws(_throws.length());
   for (int i = 0; i < _throws.length(); ++i) {
     throws.append(_throws.at(i)->canonicalize(ctx, 0));
   }
   return new MethodDescriptor(type_params, outer, params, rt, throws);
 }
 #ifndef PRODUCT
 TempNewSymbol MethodDescriptor::reify_signature(Context* ctx, TRAPS) {
   stringStream ss(256);
   ss.print("(");
   for (int i = 0; i < _parameters.length(); ++i) {
     _parameters.at(i)->reify_signature(&ss, ctx);
   }
   ss.print(")");
   _return_type->reify_signature(&ss, ctx);
   return SymbolTable::new_symbol(ss.base(), (int)ss.size(), THREAD);
 }
 void MethodDescriptor::print_on(outputStream* str) const {
   str->indent().print_cr("MethodDescriptor {");
   {
     streamIndentor si(str);
     if (_type_parameters.length() > 0) {
       str->indent().print_cr("Formals: {");
       {
         streamIndentor si(str);
         for (int i = 0; i < _type_parameters.length(); ++i) {
           _type_parameters.at(i)->print_on(str);
         }
       }
       str->indent().print_cr("}");
     }
     str->indent().print_cr("Parameters: {");
     {
       streamIndentor si(str);
       for (int i = 0; i < _parameters.length(); ++i) {
         _parameters.at(i)->print_on(str);
       }
     }
     str->indent().print_cr("}");
     str->indent().print_cr("Return Type: ");
     {
       streamIndentor si(str);
       _return_type->print_on(str);
     }
     if (_throws.length() > 0) {
       str->indent().print_cr("Throws: {");
       {
         streamIndentor si(str);
         for (int i = 0; i < _throws.length(); ++i) {
           _throws.at(i)->print_on(str);
         }
       }
       str->indent().print_cr("}");
     }
   }
   str->indent().print_cr("}");
 }
 #endif // ndef PRODUCT
 TypeParameter* TypeParameter::parse_generic_signature(DescriptorStream* STREAM) {
   STREAM->set_mark();
   char c = READ();
   while (c != ':') {
     c = READ();
   }
   Identifier* id = STREAM->identifier_from_mark();
   ClassType* class_bound = NULL;
   GrowableArray<ClassType*> interface_bounds(8);
   c = READ();
   if (c != '>') {
     if (c != ':') {
       EXPECTED(c, 'L');
       class_bound = ClassType::parse_generic_signature(CHECK_STREAM);
       c = READ();
     }
     while (c == ':') {
       EXPECT('L');
       ClassType* fts = ClassType::parse_generic_signature(CHECK_STREAM);
       interface_bounds.append(fts);
       c = READ();
     }
   }
   PUSH(c);
   return new TypeParameter(id, class_bound, interface_bounds);
 }
 void TypeParameter::bind_variables_to_parameters(Descriptor* sig, int position) {
   if (_class_bound != NULL) {
     _class_bound->bind_variables_to_parameters(sig);
   }
   for (int i = 0; i < _interface_bounds.length(); ++i) {
     _interface_bounds.at(i)->bind_variables_to_parameters(sig);
   }
   _position = position;
 }
 Type* TypeParameter::resolve(
     Context* ctx, int inner_depth, int ctx_depth) {
   if (inner_depth == -1) {
     // This indicates that the parameter is a method type parameter, which
     // isn't resolveable using the class hierarchy context
     return bound();
   }
   ClassType* provider = ctx->at_depth(ctx_depth);
   if (provider != NULL) {
     for (int i = 0; i < inner_depth && provider != NULL; ++i) {
       provider = provider->outer_class();
     }
     if (provider != NULL) {
       TypeArgument* arg = provider->type_argument_at(_position);
       if (arg != NULL) {
         Type* value = arg->lower_bound();
         return value->canonicalize(ctx, ctx_depth + 1);
       }
     }
   }
   return bound();
 }
 TypeParameter* TypeParameter::canonicalize(Context* ctx, int ctx_depth) {
   ClassType* bound = _class_bound == NULL ? NULL :
      _class_bound->canonicalize(ctx, ctx_depth);
   GrowableArray<ClassType*> ifaces(_interface_bounds.length());
   for (int i = 0; i < _interface_bounds.length(); ++i) {
     ifaces.append(_interface_bounds.at(i)->canonicalize(ctx, ctx_depth));
   }
   TypeParameter* ret = new TypeParameter(_identifier, bound, ifaces);
   ret->_position = _position;
   return ret;
 }
 ClassType* TypeParameter::bound() {
   if (_class_bound != NULL) {
     return _class_bound;
   }
   if (_interface_bounds.length() == 1) {
     return _interface_bounds.at(0);
   }
   return ClassType::java_lang_Object(); // TODO: investigate this case
 }
 #ifndef PRODUCT
 void TypeParameter::print_on(outputStream* str) const {
   str->indent().print_cr("Formal: {");
   {
     streamIndentor si(str);
     str->indent().print("Identifier: ");
     _identifier->print_on(str);
     str->print_cr("");
     if (_class_bound != NULL) {
       str->indent().print_cr("Class Bound: ");
       streamIndentor si(str);
       _class_bound->print_on(str);
     }
     if (_interface_bounds.length() > 0) {
       str->indent().print_cr("Interface Bounds: {");
       {
         streamIndentor si(str);
         for (int i = 0; i < _interface_bounds.length(); ++i) {
           _interface_bounds.at(i)->print_on(str);
         }
       }
       str->indent().print_cr("}");
     }
     str->indent().print_cr("Ordinal Position: %d", _position);
   }
   str->indent().print_cr("}");
 }
 #endif // ndef PRODUCT
 Type* Type::parse_generic_signature(DescriptorStream* STREAM) {
   char c = READ();
   switch (c) {
     case 'L':
       return ClassType::parse_generic_signature(CHECK_STREAM);
     case 'T':
       return TypeVariable::parse_generic_signature(CHECK_STREAM);
     case '[':
       return ArrayType::parse_generic_signature(CHECK_STREAM);
     default:
       return new PrimitiveType(c);
   }
 }
 Identifier* ClassType::parse_generic_signature_simple(GrowableArray<TypeArgument*>* args,
     bool* has_inner, DescriptorStream* STREAM) {
   STREAM->set_mark();
   char c = READ();
   while (c != ';' && c != '.' && c != '<') { c = READ(); }
   Identifier* id = STREAM->identifier_from_mark();
   if (c == '<') {
     c = READ();
     while (c != '>') {
       PUSH(c);
       TypeArgument* arg = TypeArgument::parse_generic_signature(CHECK_STREAM);
       args->append(arg);
       c = READ();
     }
     c = READ();
   }
   *has_inner = (c == '.');
   if (!(*has_inner)) {
     EXPECTED(c, ';');
   }
   return id;
 }
 ClassType* ClassType::parse_generic_signature(DescriptorStream* STREAM) {
   return parse_generic_signature(NULL, CHECK_STREAM);
 }
 ClassType* ClassType::parse_generic_signature(ClassType* outer, DescriptorStream* STREAM) {
   GrowableArray<TypeArgument*> args;
   ClassType* gct = NULL;
   bool has_inner = false;
   Identifier* id = parse_generic_signature_simple(&args, &has_inner, STREAM);
   if (id != NULL) {
     gct = new ClassType(id, args, outer);
     if (has_inner) {
       gct = parse_generic_signature(gct, CHECK_STREAM);
     }
   }
   return gct;
 }
 ClassType* ClassType::from_symbol(Symbol* sym) {
   assert(sym != NULL, "Must not be null");
   GrowableArray<TypeArgument*> args;
   Identifier* id = new Identifier(sym, 0, sym->utf8_length());
   return new ClassType(id, args, NULL);
 }
 ClassType* ClassType::java_lang_Object() {
   return from_symbol(vmSymbols::java_lang_Object());
 }
 void ClassType::bind_variables_to_parameters(Descriptor* sig) {
   for (int i = 0; i < _type_arguments.length(); ++i) {
     _type_arguments.at(i)->bind_variables_to_parameters(sig);
   }
   if (_outer_class != NULL) {
     _outer_class->bind_variables_to_parameters(sig);
   }
 }
 TypeArgument* ClassType::type_argument_at(int i) {
   if (i >= 0 && i < _type_arguments.length()) {
     return _type_arguments.at(i);
   } else {
     return NULL;
   }
 }
 #ifndef PRODUCT
 void ClassType::reify_signature(stringStream* ss, Context* ctx) {
   ss->print("L");
   _identifier->print_on(ss);
   ss->print(";");
 }
 void ClassType::print_on(outputStream* str) const {
   str->indent().print_cr("Class {");
   {
     streamIndentor si(str);
     str->indent().print("Name: ");
     _identifier->print_on(str);
     str->print_cr("");
     if (_type_arguments.length() != 0) {
       str->indent().print_cr("Type Arguments: {");
       {
         streamIndentor si(str);
         for (int j = 0; j < _type_arguments.length(); ++j) {
           _type_arguments.at(j)->print_on(str);
         }
       }
       str->indent().print_cr("}");
     }
     if (_outer_class != NULL) {
       str->indent().print_cr("Outer Class: ");
       streamIndentor sir(str);
       _outer_class->print_on(str);
     }
   }
   str->indent().print_cr("}");
 }
 #endif // ndef PRODUCT
 bool ClassType::covariant_match(Type* other, Context* ctx) {
   if (other == this) {
     return true;
   }
   TypeVariable* variable = other->as_variable();
   if (variable != NULL) {
     other = variable->resolve(ctx, 0);
   }
   ClassType* outer = outer_class();
   ClassType* other_class = other->as_class();
   if (other_class == NULL ||
       (outer == NULL) != (other_class->outer_class() == NULL)) {
     return false;
   }
   if (!_identifier->equals(other_class->_identifier)) {
     return false;
   }
   if (outer != NULL && !outer->covariant_match(other_class->outer_class(), ctx)) {
     return false;
   }
   return true;
 }
 ClassType* ClassType::canonicalize(Context* ctx, int ctx_depth) {
   GrowableArray<TypeArgument*> args(_type_arguments.length());
   for (int i = 0; i < _type_arguments.length(); ++i) {
     args.append(_type_arguments.at(i)->canonicalize(ctx, ctx_depth));
   }
   ClassType* outer = _outer_class == NULL ? NULL :
       _outer_class->canonicalize(ctx, ctx_depth);
   return new ClassType(_identifier, args, outer);
 }
 TypeVariable* TypeVariable::parse_generic_signature(DescriptorStream* STREAM) {
   STREAM->set_mark();
   char c = READ();
   while (c != ';') {
     c = READ();
   }
   Identifier* id = STREAM->identifier_from_mark();
   return new TypeVariable(id);
 }
 void TypeVariable::bind_variables_to_parameters(Descriptor* sig) {
   _parameter = sig->find_type_parameter(_id, &_inner_depth);
   if (VerifyGenericSignatures && _parameter == NULL) {
     fatal("Could not find formal parameter");
   }
 }
 Type* TypeVariable::resolve(Context* ctx, int ctx_depth) {
   if (parameter() != NULL) {
     return parameter()->resolve(ctx, inner_depth(), ctx_depth);
   } else {
     if (VerifyGenericSignatures) {
       fatal("Type variable matches no parameter");
     }
     return NULL;
   }
 }
 bool TypeVariable::covariant_match(Type* other, Context* ctx) {
   if (other == this) {
     return true;
   }
   Context my_context(NULL); // empty, results in erasure
   Type* my_type = resolve(&my_context, 0);
   if (my_type == NULL) {
     return false;
   }
   return my_type->covariant_match(other, ctx);
 }
 Type* TypeVariable::canonicalize(Context* ctx, int ctx_depth) {
   return resolve(ctx, ctx_depth);
 }
 #ifndef PRODUCT
 void TypeVariable::reify_signature(stringStream* ss, Context* ctx) {
   Type* type = resolve(ctx, 0);
   if (type != NULL) {
     type->reify_signature(ss, ctx);
   }
 }
 void TypeVariable::print_on(outputStream* str) const {
   str->indent().print_cr("Type Variable {");
   {
     streamIndentor si(str);
     str->indent().print("Name: ");
     _id->print_on(str);
     str->print_cr("");
     str->indent().print_cr("Inner depth: %d", _inner_depth);
   }
   str->indent().print_cr("}");
 }
 #endif // ndef PRODUCT
 ArrayType* ArrayType::parse_generic_signature(DescriptorStream* STREAM) {
   Type* base = Type::parse_generic_signature(CHECK_STREAM);
   return new ArrayType(base);
 }
 void ArrayType::bind_variables_to_parameters(Descriptor* sig) {
   assert(_base != NULL, "Invalid base");
   _base->bind_variables_to_parameters(sig);
 }
 bool ArrayType::covariant_match(Type* other, Context* ctx) {
   assert(_base != NULL, "Invalid base");
   if (other == this) {
     return true;
   }
   ArrayType* other_array = other->as_array();
   return (other_array != NULL && _base->covariant_match(other_array->_base, ctx));
 }
 ArrayType* ArrayType::canonicalize(Context* ctx, int ctx_depth) {
   assert(_base != NULL, "Invalid base");
   return new ArrayType(_base->canonicalize(ctx, ctx_depth));
 }
 #ifndef PRODUCT
 void ArrayType::reify_signature(stringStream* ss, Context* ctx) {
   assert(_base != NULL, "Invalid base");
   ss->print("[");
   _base->reify_signature(ss, ctx);
 }
 void ArrayType::print_on(outputStream* str) const {
   str->indent().print_cr("Array {");
   {
     streamIndentor si(str);
     _base->print_on(str);
   }
   str->indent().print_cr("}");
 }
 #endif // ndef PRODUCT
 bool PrimitiveType::covariant_match(Type* other, Context* ctx) {
   PrimitiveType* other_prim = other->as_primitive();
   return (other_prim != NULL && _type == other_prim->_type);
 }
 PrimitiveType* PrimitiveType::canonicalize(Context* ctx, int ctxd) {
   return this;
 }
 #ifndef PRODUCT
 void PrimitiveType::reify_signature(stringStream* ss, Context* ctx) {
   ss->print("%c", _type);
 }
 void PrimitiveType::print_on(outputStream* str) const {
   str->indent().print_cr("Primitive: '%c'", _type);
 }
 #endif // ndef PRODUCT
 void PrimitiveType::bind_variables_to_parameters(Descriptor* sig) {
 }
 TypeArgument* TypeArgument::parse_generic_signature(DescriptorStream* STREAM) {
   char c = READ();
   Type* type = NULL;
   switch (c) {
     case '*':
       return new TypeArgument(ClassType::java_lang_Object(), NULL);
       break;
     default:
       PUSH(c);
       // fall-through
     case '+':
     case '-':
       type = Type::parse_generic_signature(CHECK_STREAM);
       if (c == '+') {
         return new TypeArgument(type, NULL);
       } else if (c == '-') {
         return new TypeArgument(ClassType::java_lang_Object(), type);
       } else {
         return new TypeArgument(type, type);
       }
   }
 }
 void TypeArgument::bind_variables_to_parameters(Descriptor* sig) {
   assert(_lower_bound != NULL, "Invalid lower bound");
   _lower_bound->bind_variables_to_parameters(sig);
   if (_upper_bound != NULL && _upper_bound != _lower_bound) {
     _upper_bound->bind_variables_to_parameters(sig);
   }
 }
 bool TypeArgument::covariant_match(TypeArgument* other, Context* ctx) {
   assert(_lower_bound != NULL, "Invalid lower bound");
   if (other == this) {
     return true;
   }
   if (!_lower_bound->covariant_match(other->lower_bound(), ctx)) {
     return false;
   }
   return true;
 }
 TypeArgument* TypeArgument::canonicalize(Context* ctx, int ctx_depth) {
   assert(_lower_bound != NULL, "Invalid lower bound");
   Type* lower = _lower_bound->canonicalize(ctx, ctx_depth);
   Type* upper = NULL;
   if (_upper_bound == _lower_bound) {
     upper = lower;
   } else if (_upper_bound != NULL) {
     upper = _upper_bound->canonicalize(ctx, ctx_depth);
   }
   return new TypeArgument(lower, upper);
 }
 #ifndef PRODUCT
 void TypeArgument::print_on(outputStream* str) const {
   str->indent().print_cr("TypeArgument {");
   {
     streamIndentor si(str);
     if (_lower_bound != NULL) {
       str->indent().print("Lower bound: ");
       _lower_bound->print_on(str);
     }
     if (_upper_bound != NULL) {
       str->indent().print("Upper bound: ");
       _upper_bound->print_on(str);
     }
   }
   str->indent().print_cr("}");
 }
 #endif // ndef PRODUCT
 void Context::Mark::destroy() {
   if (is_active()) {
     _context->reset_to_mark(_marked_size);
   }
   deactivate();
 }
 void Context::apply_type_arguments(
     InstanceKlass* current, InstanceKlass* super, TRAPS) {
   assert(_cache != NULL, "Cannot use an empty context");
   ClassType* spec = NULL;
   if (current != NULL) {
     ClassDescriptor* descriptor = _cache->descriptor_for(current, CHECK);
     if (super == current->super()) {
       spec = descriptor->super();
     } else {
       spec = descriptor->interface_desc(super->name());
     }
     if (spec != NULL) {
       _type_arguments.push(spec);
     }
   }
 }
 void Context::reset_to_mark(int size) {
   _type_arguments.trunc_to(size);
 }
 ClassType* Context::at_depth(int i) const {
   if (i < _type_arguments.length()) {
     return _type_arguments.at(_type_arguments.length() - 1 - i);
   }
   return NULL;
 }
 #ifndef PRODUCT
 void Context::print_on(outputStream* str) const {
   str->indent().print_cr("Context {");
   for (int i = 0; i < _type_arguments.length(); ++i) {
     streamIndentor si(str);
     str->indent().print("leval %d: ", i);
     ClassType* ct = at_depth(i);
     if (ct == NULL) {
       str->print_cr("<empty>");
       continue;
     } else {
       str->print_cr("{");
     }
     for (int j = 0; j < ct->type_arguments_length(); ++j) {
       streamIndentor si(str);
       TypeArgument* ta = ct->type_argument_at(j);
       Type* bound = ta->lower_bound();
       bound->print_on(str);
     }
     str->indent().print_cr("}");
   }
   str->indent().print_cr("}");
 }
 #endif // ndef PRODUCT
 ClassDescriptor* DescriptorCache::descriptor_for(InstanceKlass* ik, TRAPS) {
   ClassDescriptor** existing = _class_descriptors.get(ik);
   if (existing == NULL) {
     ClassDescriptor* cd = ClassDescriptor::parse_generic_signature(ik, CHECK_NULL);
     _class_descriptors.put(ik, cd);
     return cd;
   } else {
     return *existing;
   }
 }
 MethodDescriptor* DescriptorCache::descriptor_for(
     Method* mh, ClassDescriptor* cd, TRAPS) {
   assert(mh != NULL && cd != NULL, "Should not be NULL");
   MethodDescriptor** existing = _method_descriptors.get(mh);
   if (existing == NULL) {
     MethodDescriptor* md = MethodDescriptor::parse_generic_signature(mh, cd);
     _method_descriptors.put(mh, md);
     return md;
   } else {
     return *existing;
   }
 }
 MethodDescriptor* DescriptorCache::descriptor_for(Method* mh, TRAPS) {
   ClassDescriptor* cd = descriptor_for(
       InstanceKlass::cast(mh->method_holder()), CHECK_NULL);
   return descriptor_for(mh, cd, THREAD);
 }
 } // namespace generic

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/genericSignatures.cpp@01522ca68fc7 (annotated)

src/share/vm/classfile/genericSignatures.cpp