src/hotspot/share/compiler/directivesParser.hpp
author stefank
Mon, 25 Nov 2019 12:31:39 +0100
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8234737: Harmonize parameter order in Atomic - add Reviewed-by: rehn, dholmes
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/*
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 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_COMPILER_DIRECTIVESPARSER_HPP
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#define SHARE_COMPILER_DIRECTIVESPARSER_HPP
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#include "utilities/json.hpp"
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#include "compiler/compilerDirectives.hpp"
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enum FlagType {
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  boolFlag,
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  intxFlag,
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  uintxFlag,
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  doubleFlag,
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  ccstrFlag,
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  ccstrlistFlag,
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  UnknownFlagType
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};
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static const char* flag_type_names[] = {
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    "bool",
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    "int",
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    "uint",
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    "double",
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    "string",
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    "string list",
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    "unknown"
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};
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class DirectivesParserTest;
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class DirectivesParser : public JSON {
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 friend class DirectivesParserTest;
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 public:
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  static bool has_file();
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  static bool parse_from_flag();
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  static bool parse_from_file(const char* filename, outputStream* st);
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  static int  parse_string(const char* string, outputStream* st);
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  int install_directives();
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 private:
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  DirectivesParser(const char* text, outputStream* st, bool silent);
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  ~DirectivesParser();
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  bool callback(JSON_TYPE t, JSON_VAL* v, uint level);
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  static bool parse_from_file_inner(const char* filename, outputStream* st);
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  // types of "keys". i.e recognized <key>:<value> pairs in our JSON syntax
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  typedef enum {
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     type_c1,
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     type_c2,
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     type_enable,
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     type_preset,
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     type_match,
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     type_inline,
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     // After here, there is no correlation between
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     // keytype and keys array
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     //type_strategy,
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     type_flag,
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     //type_dir,
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     // Synthetic.
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     type_dir_array,
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     type_directives,
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     type_value_array
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  } keytype;
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  // name, type, dtd info and maybe a setter
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  // this is how we map key-values
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  typedef struct {
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     const char *name;
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     keytype     type;
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     uint    allow_array_value : 1;
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     uint    allowedmask;
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     void (DirectiveSet::*set)(void* arg);
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     FlagType flag_type;
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  } key;
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  // Array with valid keys for the directive file
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  static const key keys[];
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  // Marker for outermost moosewings/array
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  static const key dir_array_key;
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  // Marker for a directives set (these are "implicit" objects, as in not named)
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  static const key dir_key;
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  // Marker for a multi value
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  static const key value_array_key;
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  // A compiler directive shouldn't be able to use more than 5 stack slots.
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  // Example of max stack usage:
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  // depth 1: type_dir_array  [
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  // depth 2: type_directives   {
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  // depth 3: type_c1             c1: {
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  // depth 4: type_inline           inline:
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  // depth 5: type_value_array      [ ...
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  static const uint MAX_DEPTH = 5;
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  const key* stack[MAX_DEPTH];
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  uint depth;
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  bool push_key(const char* str, size_t len);
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  bool push_key(const key* k);
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  const key* current_key();
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  const key* pop_key();
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  static const key* lookup_key(const char* s, size_t len);
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  bool set_option(JSON_TYPE t, JSON_VAL* v);
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  bool set_option_flag(JSON_TYPE t, JSON_VAL* v, const key* option_key, DirectiveSet* set);
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  CompilerDirectives* current_directive;
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  DirectiveSet*       current_directiveset;
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  void push_tmp(CompilerDirectives* dir);
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  void clean_tmp();
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  CompilerDirectives* pop_tmp();
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  CompilerDirectives* _tmp_top; // temporary storage for dirs while parsing
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  int _tmp_depth;               // Number of directives that has been parsed but not installed.
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  static uint mask(keytype kt);
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};
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#endif // SHARE_COMPILER_DIRECTIVESPARSER_HPP