jdk8-mips64-public/hotspot: src/share/vm/shark/sharkValue.hpp@427b2fb1944f (annotated)

src/share/vm/shark/sharkValue.hpp@427b2fb1944f (annotated)

src/share/vm/shark/sharkValue.hpp

Wed, 31 Jan 2018 19:24:57 -0500

author: dbuck
date: Wed, 31 Jan 2018 19:24:57 -0500
changeset 9289: 427b2fb1944f
parent 2314: f95d63e2154a
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM
Reviewed-by: dcubed

 /*
  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2008, 2009 Red Hat, Inc.
  * 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.
  *
  */
 #ifndef SHARE_VM_SHARK_SHARKVALUE_HPP
 #define SHARE_VM_SHARK_SHARKVALUE_HPP
 #include "ci/ciType.hpp"
 #include "memory/allocation.hpp"
 #include "shark/llvmHeaders.hpp"
 #include "shark/llvmValue.hpp"
 #include "shark/sharkType.hpp"
 // Items on the stack and in local variables are tracked using
 // SharkValue objects.
 //
 // All SharkValues are one of two core types, SharkNormalValue
 // and SharkAddressValue, but no code outside this file should
 // ever refer to those directly.  The split is because of the
 // way JSRs are handled: the typeflow pass expands them into
 // multiple copies, so the return addresses pushed by jsr and
 // popped by ret only exist at compile time.  Having separate
 // classes for these allows us to check that our jsr handling
 // is correct, via assertions.
 //
 // There is one more type, SharkPHIValue, which is a subclass
 // of SharkNormalValue with a couple of extra methods.  Use of
 // SharkPHIValue outside of this file is acceptable, so long
 // as it is obtained via SharkValue::as_phi().
 class SharkBuilder;
 class SharkPHIValue;
 class SharkValue : public ResourceObj {
  protected:
   SharkValue() {}
   // Cloning
  public:
   virtual SharkValue* clone() const = 0;
   // Casting
  public:
   virtual bool           is_phi() const;
   virtual SharkPHIValue* as_phi();
   // Comparison
  public:
   virtual bool equal_to(SharkValue* other) const = 0;
   // Type access
  public:
   virtual BasicType basic_type() const = 0;
   virtual ciType*   type()       const;
   virtual bool is_jint()    const;
   virtual bool is_jlong()   const;
   virtual bool is_jfloat()  const;
   virtual bool is_jdouble() const;
   virtual bool is_jobject() const;
   virtual bool is_jarray()  const;
   virtual bool is_address() const;
   virtual int size() const = 0;
   bool is_one_word() const {
     return size() == 1;
   }
   bool is_two_word() const {
     return size() == 2;
   }
   // Typed conversion from SharkValues
  public:
   virtual llvm::Value* jint_value()    const;
   virtual llvm::Value* jlong_value()   const;
   virtual llvm::Value* jfloat_value()  const;
   virtual llvm::Value* jdouble_value() const;
   virtual llvm::Value* jobject_value() const;
   virtual llvm::Value* jarray_value()  const;
   virtual int          address_value() const;
   // Typed conversion to SharkValues
  public:
   static SharkValue* create_jint(llvm::Value* value, bool zero_checked) {
     assert(value->getType() == SharkType::jint_type(), "should be");
     return create_generic(ciType::make(T_INT), value, zero_checked);
   }
   static SharkValue* create_jlong(llvm::Value* value, bool zero_checked) {
     assert(value->getType() == SharkType::jlong_type(), "should be");
     return create_generic(ciType::make(T_LONG), value, zero_checked);
   }
   static SharkValue* create_jfloat(llvm::Value* value) {
     assert(value->getType() == SharkType::jfloat_type(), "should be");
     return create_generic(ciType::make(T_FLOAT), value, false);
   }
   static SharkValue* create_jdouble(llvm::Value* value) {
     assert(value->getType() == SharkType::jdouble_type(), "should be");
     return create_generic(ciType::make(T_DOUBLE), value, false);
   }
   static SharkValue* create_jobject(llvm::Value* value, bool zero_checked) {
     assert(value->getType() == SharkType::oop_type(), "should be");
     return create_generic(ciType::make(T_OBJECT), value, zero_checked);
   }
   // Typed conversion from constants of various types
  public:
   static SharkValue* jint_constant(jint value) {
     return create_jint(LLVMValue::jint_constant(value), value != 0);
   }
   static SharkValue* jlong_constant(jlong value) {
     return create_jlong(LLVMValue::jlong_constant(value), value != 0);
   }
   static SharkValue* jfloat_constant(jfloat value) {
     return create_jfloat(LLVMValue::jfloat_constant(value));
   }
   static SharkValue* jdouble_constant(jdouble value) {
     return create_jdouble(LLVMValue::jdouble_constant(value));
   }
   static SharkValue* null() {
     return create_jobject(LLVMValue::null(), false);
   }
   static inline SharkValue* address_constant(int bci);
   // Type-losing conversions -- use with care!
  public:
   virtual llvm::Value* generic_value() const = 0;
   virtual llvm::Value* intptr_value(SharkBuilder* builder) const;
   static inline SharkValue* create_generic(ciType*      type,
                                            llvm::Value* value,
                                            bool         zero_checked);
   static inline SharkValue* create_phi(ciType*              type,
                                        llvm::PHINode*       phi,
                                        const SharkPHIValue* parent = NULL);
   // Phi-style stuff
  public:
   virtual void addIncoming(SharkValue* value, llvm::BasicBlock* block);
   virtual SharkValue* merge(SharkBuilder*     builder,
                             SharkValue*       other,
                             llvm::BasicBlock* other_block,
                             llvm::BasicBlock* this_block,
                             const char*       name) = 0;
   // Repeated null and divide-by-zero check removal
  public:
   virtual bool zero_checked() const;
   virtual void set_zero_checked(bool zero_checked);
 };
 class SharkNormalValue : public SharkValue {
   friend class SharkValue;
  protected:
   SharkNormalValue(ciType* type, llvm::Value* value, bool zero_checked)
     : _type(type), _llvm_value(value), _zero_checked(zero_checked) {}
  private:
   ciType*      _type;
   llvm::Value* _llvm_value;
   bool         _zero_checked;
  private:
   llvm::Value* llvm_value() const {
     return _llvm_value;
   }
   // Cloning
  public:
   SharkValue* clone() const;
   // Comparison
  public:
   bool equal_to(SharkValue* other) const;
   // Type access
  public:
   ciType*   type()       const;
   BasicType basic_type() const;
   int       size()       const;
  public:
   bool is_jint()    const;
   bool is_jlong()   const;
   bool is_jfloat()  const;
   bool is_jdouble() const;
   bool is_jobject() const;
   bool is_jarray()  const;
   // Typed conversions to LLVM values
  public:
   llvm::Value* jint_value()    const;
   llvm::Value* jlong_value()   const;
   llvm::Value* jfloat_value()  const;
   llvm::Value* jdouble_value() const;
   llvm::Value* jobject_value() const;
   llvm::Value* jarray_value()  const;
   // Type-losing conversions, use with care
  public:
   llvm::Value* generic_value() const;
   llvm::Value* intptr_value(SharkBuilder* builder) const;
   // Phi-style stuff
  public:
   SharkValue* merge(SharkBuilder*     builder,
                     SharkValue*       other,
                     llvm::BasicBlock* other_block,
                     llvm::BasicBlock* this_block,
                     const char*       name);
   // Repeated null and divide-by-zero check removal
  public:
   bool zero_checked() const;
   void set_zero_checked(bool zero_checked);
 };
 class SharkPHIValue : public SharkNormalValue {
   friend class SharkValue;
  protected:
   SharkPHIValue(ciType* type, llvm::PHINode* phi, const SharkPHIValue *parent)
     : SharkNormalValue(type, phi, parent && parent->zero_checked()),
       _parent(parent),
       _all_incomers_zero_checked(true) {}
  private:
   const SharkPHIValue* _parent;
   bool                 _all_incomers_zero_checked;
  private:
   const SharkPHIValue* parent() const {
     return _parent;
   }
   bool is_clone() const {
     return parent() != NULL;
   }
  public:
   bool all_incomers_zero_checked() const {
     if (is_clone())
       return parent()->all_incomers_zero_checked();
     return _all_incomers_zero_checked;
   }
   // Cloning
  public:
   SharkValue* clone() const;
   // Casting
  public:
   bool           is_phi() const;
   SharkPHIValue* as_phi();
   // Phi-style stuff
  public:
   void addIncoming(SharkValue *value, llvm::BasicBlock* block);
 };
 class SharkAddressValue : public SharkValue {
   friend class SharkValue;
  protected:
   SharkAddressValue(int bci)
     : _bci(bci) {}
  private:
   int _bci;
   // Cloning
  public:
   SharkValue* clone() const;
   // Comparison
  public:
   bool equal_to(SharkValue* other) const;
   // Type access
  public:
   BasicType basic_type() const;
   int       size()       const;
   bool      is_address() const;
   // Typed conversion from SharkValues
  public:
   int address_value() const;
   // Type-losing conversion -- use with care!
  public:
   llvm::Value* generic_value() const;
   // Phi-style stuff
  public:
   void addIncoming(SharkValue *value, llvm::BasicBlock* block);
   SharkValue* merge(SharkBuilder*     builder,
                     SharkValue*       other,
                     llvm::BasicBlock* other_block,
                     llvm::BasicBlock* this_block,
                     const char*       name);
 };
 // SharkValue methods that can't be declared above
 inline SharkValue* SharkValue::create_generic(ciType*      type,
                                               llvm::Value* value,
                                               bool         zero_checked) {
   return new SharkNormalValue(type, value, zero_checked);
 }
 inline SharkValue* SharkValue::create_phi(ciType*              type,
                                           llvm::PHINode*       phi,
                                           const SharkPHIValue* parent) {
   return new SharkPHIValue(type, phi, parent);
 }
 inline SharkValue* SharkValue::address_constant(int bci) {
   return new SharkAddressValue(bci);
 }
 #endif // SHARE_VM_SHARK_SHARKVALUE_HPP

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src/share/vm/shark/sharkValue.hpp@427b2fb1944f (annotated)

src/share/vm/shark/sharkValue.hpp