src/hotspot/share/runtime/flags/jvmFlagConstraintList.cpp

*** 1,7 ****
  /*
!  * Copyright (c) 2015, 2017, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 2015, 2018, 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.
*** 25,38 ****
  #include "precompiled.hpp"
  #include "classfile/stringTable.hpp"
  #include "classfile/symbolTable.hpp"
  #include "gc/shared/referenceProcessor.hpp"
  #include "runtime/arguments.hpp"
! #include "runtime/commandLineFlagConstraintList.hpp"
! #include "runtime/commandLineFlagConstraintsCompiler.hpp"
! #include "runtime/commandLineFlagConstraintsGC.hpp"
! #include "runtime/commandLineFlagConstraintsRuntime.hpp"
  #include "runtime/os.hpp"
  #include "utilities/macros.hpp"
  #if INCLUDE_ALL_GCS
  #include "gc/g1/g1_globals.hpp"
  #endif
--- 25,38 ----
  #include "precompiled.hpp"
  #include "classfile/stringTable.hpp"
  #include "classfile/symbolTable.hpp"
  #include "gc/shared/referenceProcessor.hpp"
  #include "runtime/arguments.hpp"
! #include "runtime/flags/jvmFlagConstraintList.hpp"
! #include "runtime/flags/jvmFlagConstraintsCompiler.hpp"
! #include "runtime/flags/jvmFlagConstraintsGC.hpp"
! #include "runtime/flags/jvmFlagConstraintsRuntime.hpp"
  #include "runtime/os.hpp"
  #include "utilities/macros.hpp"
  #if INCLUDE_ALL_GCS
  #include "gc/g1/g1_globals.hpp"
  #endif
*** 42,206 ****
  #ifdef COMPILER2
  #include "opto/c2_globals.hpp"
  #endif
  
  
! class CommandLineFlagConstraint_bool : public CommandLineFlagConstraint {
!   CommandLineFlagConstraintFunc_bool _constraint;
    const bool* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   CommandLineFlagConstraint_bool(const char* name, const bool* ptr,
!                                  CommandLineFlagConstraintFunc_bool func,
!                                  ConstraintType type) : CommandLineFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   Flag::Error apply(bool verbose) {
      bool value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   Flag::Error apply_bool(bool value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class CommandLineFlagConstraint_int : public CommandLineFlagConstraint {
!   CommandLineFlagConstraintFunc_int _constraint;
    const int* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   CommandLineFlagConstraint_int(const char* name, const int* ptr,
!                                 CommandLineFlagConstraintFunc_int func,
!                                 ConstraintType type) : CommandLineFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   Flag::Error apply(bool verbose) {
      int value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   Flag::Error apply_int(int value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class CommandLineFlagConstraint_intx : public CommandLineFlagConstraint {
!   CommandLineFlagConstraintFunc_intx _constraint;
    const intx* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   CommandLineFlagConstraint_intx(const char* name, const intx* ptr,
!                                  CommandLineFlagConstraintFunc_intx func,
!                                  ConstraintType type) : CommandLineFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   Flag::Error apply(bool verbose) {
      intx value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   Flag::Error apply_intx(intx value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class CommandLineFlagConstraint_uint : public CommandLineFlagConstraint {
!   CommandLineFlagConstraintFunc_uint _constraint;
    const uint* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   CommandLineFlagConstraint_uint(const char* name, const uint* ptr,
!                                  CommandLineFlagConstraintFunc_uint func,
!                                  ConstraintType type) : CommandLineFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   Flag::Error apply(bool verbose) {
      uint value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   Flag::Error apply_uint(uint value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class CommandLineFlagConstraint_uintx : public CommandLineFlagConstraint {
!   CommandLineFlagConstraintFunc_uintx _constraint;
    const uintx* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   CommandLineFlagConstraint_uintx(const char* name, const uintx* ptr,
!                                   CommandLineFlagConstraintFunc_uintx func,
!                                  ConstraintType type) : CommandLineFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   Flag::Error apply(bool verbose) {
      uintx value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   Flag::Error apply_uintx(uintx value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class CommandLineFlagConstraint_uint64_t : public CommandLineFlagConstraint {
!   CommandLineFlagConstraintFunc_uint64_t _constraint;
    const uint64_t* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   CommandLineFlagConstraint_uint64_t(const char* name, const uint64_t* ptr,
!                                      CommandLineFlagConstraintFunc_uint64_t func,
!                                  ConstraintType type) : CommandLineFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   Flag::Error apply(bool verbose) {
      uint64_t value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   Flag::Error apply_uint64_t(uint64_t value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class CommandLineFlagConstraint_size_t : public CommandLineFlagConstraint {
!   CommandLineFlagConstraintFunc_size_t _constraint;
    const size_t* _ptr;
  public:
    // the "name" argument must be a string literal
!   CommandLineFlagConstraint_size_t(const char* name, const size_t* ptr,
!                                    CommandLineFlagConstraintFunc_size_t func,
!                                  ConstraintType type) : CommandLineFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   Flag::Error apply(bool verbose) {
      size_t value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   Flag::Error apply_size_t(size_t value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class CommandLineFlagConstraint_double : public CommandLineFlagConstraint {
!   CommandLineFlagConstraintFunc_double _constraint;
    const double* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   CommandLineFlagConstraint_double(const char* name, const double* ptr,
!                                    CommandLineFlagConstraintFunc_double func,
!                                  ConstraintType type) : CommandLineFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   Flag::Error apply(bool verbose) {
      double value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   Flag::Error apply_double(double value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
  // No constraint emitting
--- 42,206 ----
  #ifdef COMPILER2
  #include "opto/c2_globals.hpp"
  #endif
  
  
! class JVMFlagConstraint_bool : public JVMFlagConstraint {
!   JVMFlagConstraintFunc_bool _constraint;
    const bool* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   JVMFlagConstraint_bool(const char* name, const bool* ptr,
!                                  JVMFlagConstraintFunc_bool func,
!                                  ConstraintType type) : JVMFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   JVMFlag::Error apply(bool verbose) {
      bool value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   JVMFlag::Error apply_bool(bool value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class JVMFlagConstraint_int : public JVMFlagConstraint {
!   JVMFlagConstraintFunc_int _constraint;
    const int* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   JVMFlagConstraint_int(const char* name, const int* ptr,
!                                 JVMFlagConstraintFunc_int func,
!                                 ConstraintType type) : JVMFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   JVMFlag::Error apply(bool verbose) {
      int value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   JVMFlag::Error apply_int(int value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class JVMFlagConstraint_intx : public JVMFlagConstraint {
!   JVMFlagConstraintFunc_intx _constraint;
    const intx* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   JVMFlagConstraint_intx(const char* name, const intx* ptr,
!                                  JVMFlagConstraintFunc_intx func,
!                                  ConstraintType type) : JVMFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   JVMFlag::Error apply(bool verbose) {
      intx value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   JVMFlag::Error apply_intx(intx value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class JVMFlagConstraint_uint : public JVMFlagConstraint {
!   JVMFlagConstraintFunc_uint _constraint;
    const uint* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   JVMFlagConstraint_uint(const char* name, const uint* ptr,
!                                  JVMFlagConstraintFunc_uint func,
!                                  ConstraintType type) : JVMFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   JVMFlag::Error apply(bool verbose) {
      uint value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   JVMFlag::Error apply_uint(uint value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class JVMFlagConstraint_uintx : public JVMFlagConstraint {
!   JVMFlagConstraintFunc_uintx _constraint;
    const uintx* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   JVMFlagConstraint_uintx(const char* name, const uintx* ptr,
!                                   JVMFlagConstraintFunc_uintx func,
!                                  ConstraintType type) : JVMFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   JVMFlag::Error apply(bool verbose) {
      uintx value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   JVMFlag::Error apply_uintx(uintx value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class JVMFlagConstraint_uint64_t : public JVMFlagConstraint {
!   JVMFlagConstraintFunc_uint64_t _constraint;
    const uint64_t* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   JVMFlagConstraint_uint64_t(const char* name, const uint64_t* ptr,
!                                      JVMFlagConstraintFunc_uint64_t func,
!                                  ConstraintType type) : JVMFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   JVMFlag::Error apply(bool verbose) {
      uint64_t value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   JVMFlag::Error apply_uint64_t(uint64_t value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class JVMFlagConstraint_size_t : public JVMFlagConstraint {
!   JVMFlagConstraintFunc_size_t _constraint;
    const size_t* _ptr;
  public:
    // the "name" argument must be a string literal
!   JVMFlagConstraint_size_t(const char* name, const size_t* ptr,
!                                    JVMFlagConstraintFunc_size_t func,
!                                  ConstraintType type) : JVMFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   JVMFlag::Error apply(bool verbose) {
      size_t value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   JVMFlag::Error apply_size_t(size_t value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
! class JVMFlagConstraint_double : public JVMFlagConstraint {
!   JVMFlagConstraintFunc_double _constraint;
    const double* _ptr;
  
  public:
    // the "name" argument must be a string literal
!   JVMFlagConstraint_double(const char* name, const double* ptr,
!                                    JVMFlagConstraintFunc_double func,
!                                  ConstraintType type) : JVMFlagConstraint(name, type), _constraint(func), _ptr(ptr) {}
  
!   JVMFlag::Error apply(bool verbose) {
      double value = *_ptr;
      return _constraint(value, verbose);
    }
  
!   JVMFlag::Error apply_double(double value, bool verbose) {
      return _constraint(value, verbose);
    }
  };
  
  // No constraint emitting
*** 216,249 ****
  void emit_constraint_uintx(const char* /*name*/, const uintx* /*value*/)          { /* NOP */ }
  void emit_constraint_uint64_t(const char* /*name*/, const uint64_t* /*value*/)    { /* NOP */ }
  void emit_constraint_size_t(const char* /*name*/, const size_t* /*value*/)        { /* NOP */ }
  void emit_constraint_double(const char* /*name*/, const double* /*value*/)        { /* NOP */ }
  
! // CommandLineFlagConstraint emitting code functions if function argument is provided
! void emit_constraint_bool(const char* name, const bool* ptr, CommandLineFlagConstraintFunc_bool func, CommandLineFlagConstraint::ConstraintType type) {
!   CommandLineFlagConstraintList::add(new CommandLineFlagConstraint_bool(name, ptr, func, type));
  }
! void emit_constraint_int(const char* name, const int* ptr, CommandLineFlagConstraintFunc_int func, CommandLineFlagConstraint::ConstraintType type) {
!   CommandLineFlagConstraintList::add(new CommandLineFlagConstraint_int(name, ptr, func, type));
  }
! void emit_constraint_intx(const char* name, const intx* ptr, CommandLineFlagConstraintFunc_intx func, CommandLineFlagConstraint::ConstraintType type) {
!   CommandLineFlagConstraintList::add(new CommandLineFlagConstraint_intx(name, ptr, func, type));
  }
! void emit_constraint_uint(const char* name, const uint* ptr, CommandLineFlagConstraintFunc_uint func, CommandLineFlagConstraint::ConstraintType type) {
!   CommandLineFlagConstraintList::add(new CommandLineFlagConstraint_uint(name, ptr, func, type));
  }
! void emit_constraint_uintx(const char* name, const uintx* ptr, CommandLineFlagConstraintFunc_uintx func, CommandLineFlagConstraint::ConstraintType type) {
!   CommandLineFlagConstraintList::add(new CommandLineFlagConstraint_uintx(name, ptr, func, type));
  }
! void emit_constraint_uint64_t(const char* name, const uint64_t* ptr, CommandLineFlagConstraintFunc_uint64_t func, CommandLineFlagConstraint::ConstraintType type) {
!   CommandLineFlagConstraintList::add(new CommandLineFlagConstraint_uint64_t(name, ptr, func, type));
  }
! void emit_constraint_size_t(const char* name, const size_t* ptr, CommandLineFlagConstraintFunc_size_t func, CommandLineFlagConstraint::ConstraintType type) {
!   CommandLineFlagConstraintList::add(new CommandLineFlagConstraint_size_t(name, ptr, func, type));
  }
! void emit_constraint_double(const char* name, const double* ptr, CommandLineFlagConstraintFunc_double func, CommandLineFlagConstraint::ConstraintType type) {
!   CommandLineFlagConstraintList::add(new CommandLineFlagConstraint_double(name, ptr, func, type));
  }
  
  // Generate code to call emit_constraint_xxx function
  #define EMIT_CONSTRAINT_PRODUCT_FLAG(type, name, value, doc)      ); emit_constraint_##type(#name,&name
  #define EMIT_CONSTRAINT_COMMERCIAL_FLAG(type, name, value, doc)   ); emit_constraint_##type(#name,&name
--- 216,249 ----
  void emit_constraint_uintx(const char* /*name*/, const uintx* /*value*/)          { /* NOP */ }
  void emit_constraint_uint64_t(const char* /*name*/, const uint64_t* /*value*/)    { /* NOP */ }
  void emit_constraint_size_t(const char* /*name*/, const size_t* /*value*/)        { /* NOP */ }
  void emit_constraint_double(const char* /*name*/, const double* /*value*/)        { /* NOP */ }
  
! // JVMFlagConstraint emitting code functions if function argument is provided
! void emit_constraint_bool(const char* name, const bool* ptr, JVMFlagConstraintFunc_bool func, JVMFlagConstraint::ConstraintType type) {
!   JVMFlagConstraintList::add(new JVMFlagConstraint_bool(name, ptr, func, type));
  }
! void emit_constraint_int(const char* name, const int* ptr, JVMFlagConstraintFunc_int func, JVMFlagConstraint::ConstraintType type) {
!   JVMFlagConstraintList::add(new JVMFlagConstraint_int(name, ptr, func, type));
  }
! void emit_constraint_intx(const char* name, const intx* ptr, JVMFlagConstraintFunc_intx func, JVMFlagConstraint::ConstraintType type) {
!   JVMFlagConstraintList::add(new JVMFlagConstraint_intx(name, ptr, func, type));
  }
! void emit_constraint_uint(const char* name, const uint* ptr, JVMFlagConstraintFunc_uint func, JVMFlagConstraint::ConstraintType type) {
!   JVMFlagConstraintList::add(new JVMFlagConstraint_uint(name, ptr, func, type));
  }
! void emit_constraint_uintx(const char* name, const uintx* ptr, JVMFlagConstraintFunc_uintx func, JVMFlagConstraint::ConstraintType type) {
!   JVMFlagConstraintList::add(new JVMFlagConstraint_uintx(name, ptr, func, type));
  }
! void emit_constraint_uint64_t(const char* name, const uint64_t* ptr, JVMFlagConstraintFunc_uint64_t func, JVMFlagConstraint::ConstraintType type) {
!   JVMFlagConstraintList::add(new JVMFlagConstraint_uint64_t(name, ptr, func, type));
  }
! void emit_constraint_size_t(const char* name, const size_t* ptr, JVMFlagConstraintFunc_size_t func, JVMFlagConstraint::ConstraintType type) {
!   JVMFlagConstraintList::add(new JVMFlagConstraint_size_t(name, ptr, func, type));
  }
! void emit_constraint_double(const char* name, const double* ptr, JVMFlagConstraintFunc_double func, JVMFlagConstraint::ConstraintType type) {
!   JVMFlagConstraintList::add(new JVMFlagConstraint_double(name, ptr, func, type));
  }
  
  // Generate code to call emit_constraint_xxx function
  #define EMIT_CONSTRAINT_PRODUCT_FLAG(type, name, value, doc)      ); emit_constraint_##type(#name,&name
  #define EMIT_CONSTRAINT_COMMERCIAL_FLAG(type, name, value, doc)   ); emit_constraint_##type(#name,&name
*** 267,286 ****
  #else
  #define EMIT_CONSTRAINT_LP64_PRODUCT_FLAG(type, name, value, doc) ); emit_constraint_no(#name,&name
  #endif
  
  // Generate func argument to pass into emit_constraint_xxx functions
! #define EMIT_CONSTRAINT_CHECK(func, type)                         , func, CommandLineFlagConstraint::type
  
  // the "name" argument must be a string literal
  #define INITIAL_CONSTRAINTS_SIZE 72
! GrowableArray<CommandLineFlagConstraint*>* CommandLineFlagConstraintList::_constraints = NULL;
! CommandLineFlagConstraint::ConstraintType CommandLineFlagConstraintList::_validating_type = CommandLineFlagConstraint::AtParse;
  
  // Check the ranges of all flags that have them or print them out and exit if requested
! void CommandLineFlagConstraintList::init(void) {
!   _constraints = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<CommandLineFlagConstraint*>(INITIAL_CONSTRAINTS_SIZE, true);
  
    emit_constraint_no(NULL RUNTIME_FLAGS(EMIT_CONSTRAINT_DEVELOPER_FLAG,
                                          EMIT_CONSTRAINT_PD_DEVELOPER_FLAG,
                                          EMIT_CONSTRAINT_PRODUCT_FLAG,
                                          EMIT_CONSTRAINT_PD_PRODUCT_FLAG,
--- 267,286 ----
  #else
  #define EMIT_CONSTRAINT_LP64_PRODUCT_FLAG(type, name, value, doc) ); emit_constraint_no(#name,&name
  #endif
  
  // Generate func argument to pass into emit_constraint_xxx functions
! #define EMIT_CONSTRAINT_CHECK(func, type)                         , func, JVMFlagConstraint::type
  
  // the "name" argument must be a string literal
  #define INITIAL_CONSTRAINTS_SIZE 72
! GrowableArray<JVMFlagConstraint*>* JVMFlagConstraintList::_constraints = NULL;
! JVMFlagConstraint::ConstraintType JVMFlagConstraintList::_validating_type = JVMFlagConstraint::AtParse;
  
  // Check the ranges of all flags that have them or print them out and exit if requested
! void JVMFlagConstraintList::init(void) {
!   _constraints = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JVMFlagConstraint*>(INITIAL_CONSTRAINTS_SIZE, true);
  
    emit_constraint_no(NULL RUNTIME_FLAGS(EMIT_CONSTRAINT_DEVELOPER_FLAG,
                                          EMIT_CONSTRAINT_PD_DEVELOPER_FLAG,
                                          EMIT_CONSTRAINT_PRODUCT_FLAG,
                                          EMIT_CONSTRAINT_PD_PRODUCT_FLAG,
*** 349,388 ****
                                     EMIT_CONSTRAINT_CHECK,
                                     IGNORE_WRITEABLE));
  #endif // INCLUDE_ALL_GCS
  }
  
! CommandLineFlagConstraint* CommandLineFlagConstraintList::find(const char* name) {
!   CommandLineFlagConstraint* found = NULL;
    for (int i=0; i<length(); i++) {
!     CommandLineFlagConstraint* constraint = at(i);
      if (strcmp(constraint->name(), name) == 0) {
        found = constraint;
        break;
      }
    }
    return found;
  }
  
  // Find constraints by name and return only if found constraint's type is equal or lower than current validating type.
! CommandLineFlagConstraint* CommandLineFlagConstraintList::find_if_needs_check(const char* name) {
!   CommandLineFlagConstraint* found = NULL;
!   CommandLineFlagConstraint* constraint = find(name);
    if (constraint && (constraint->type() <= _validating_type)) {
      found = constraint;
    }
    return found;
  }
  
  // Check constraints for specific constraint type.
! bool CommandLineFlagConstraintList::check_constraints(CommandLineFlagConstraint::ConstraintType type) {
    guarantee(type > _validating_type, "Constraint check is out of order.");
    _validating_type = type;
  
    bool status = true;
    for (int i=0; i<length(); i++) {
!     CommandLineFlagConstraint* constraint = at(i);
      if (type != constraint->type()) continue;
!     if (constraint->apply(true) != Flag::SUCCESS) status = false;
    }
    return status;
  }
--- 349,388 ----
                                     EMIT_CONSTRAINT_CHECK,
                                     IGNORE_WRITEABLE));
  #endif // INCLUDE_ALL_GCS
  }
  
! JVMFlagConstraint* JVMFlagConstraintList::find(const char* name) {
!   JVMFlagConstraint* found = NULL;
    for (int i=0; i<length(); i++) {
!     JVMFlagConstraint* constraint = at(i);
      if (strcmp(constraint->name(), name) == 0) {
        found = constraint;
        break;
      }
    }
    return found;
  }
  
  // Find constraints by name and return only if found constraint's type is equal or lower than current validating type.
! JVMFlagConstraint* JVMFlagConstraintList::find_if_needs_check(const char* name) {
!   JVMFlagConstraint* found = NULL;
!   JVMFlagConstraint* constraint = find(name);
    if (constraint && (constraint->type() <= _validating_type)) {
      found = constraint;
    }
    return found;
  }
  
  // Check constraints for specific constraint type.
! bool JVMFlagConstraintList::check_constraints(JVMFlagConstraint::ConstraintType type) {
    guarantee(type > _validating_type, "Constraint check is out of order.");
    _validating_type = type;
  
    bool status = true;
    for (int i=0; i<length(); i++) {
!     JVMFlagConstraint* constraint = at(i);
      if (type != constraint->type()) continue;
!     if (constraint->apply(true) != JVMFlag::SUCCESS) status = false;
    }
    return status;
  }