1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_COMPILER_METHODMATCHER_HPP
  26 #define SHARE_VM_COMPILER_METHODMATCHER_HPP
  27 
  28 #include "memory/allocation.inline.hpp"
  29 #include "runtime/handles.inline.hpp"
  30 #include "memory/resourceArea.hpp"
  31 
  32 class MethodMatcher : public CHeapObj<mtCompiler> {
  33  public:
  34   enum Mode {
  35     Exact,
  36     Prefix = 1,
  37     Suffix = 2,
  38     Substring = Prefix | Suffix,
  39     Any,
  40     Unknown = -1
  41   };
  42 
  43  protected:
  44   Symbol*        _class_name;
  45   Symbol*        _method_name;
  46   Symbol*        _signature;
  47   Mode           _class_mode;
  48   Mode           _method_mode;
  49 
  50  public:
  51   Symbol* class_name() const { return _class_name; }
  52   Mode class_mode() const { return _class_mode; }
  53   Symbol* method_name() const { return _method_name; }
  54   Mode method_mode() const { return _method_mode; }
  55   Symbol* signature() const { return _signature; }
  56 
  57   MethodMatcher();
  58   ~MethodMatcher();
  59 
  60   void init(Symbol* class_name, Mode class_mode, Symbol* method_name, Mode method_mode, Symbol* signature);
  61   static void parse_method_pattern(char*& line, const char*& error_msg, MethodMatcher* m);
  62   static void print_symbol(outputStream* st, Symbol* h, Mode mode);
  63   bool matches(methodHandle method) const;
  64   void print_base(outputStream* st);
  65 
  66  private:
  67   static bool canonicalize(char * line, const char *& error_msg);
  68   bool match(Symbol* candidate, Symbol* match, Mode match_mode) const;
  69 };
  70 
  71 class BasicMatcher : public MethodMatcher {
  72 private:
  73   BasicMatcher* _next;
  74 public:
  75 
  76   BasicMatcher() : MethodMatcher(),
  77     _next(NULL) {
  78   }
  79 
  80   BasicMatcher(BasicMatcher* next) :
  81     _next(next) {
  82   }
  83 
  84   static BasicMatcher* parse_method_pattern(char* line, const char*& error_msg) {
  85     assert(error_msg == NULL, "Dont call here with error_msg already set");
  86     BasicMatcher* bm = new BasicMatcher();
  87     MethodMatcher::parse_method_pattern(line, error_msg, bm);
  88     if (error_msg != NULL) {
  89       delete bm;
  90       return NULL;
  91     }
  92 
  93     // check for bad trailing characters
  94     int bytes_read = 0;
  95     sscanf(line, "%*[ \t]%n", &bytes_read);
  96     if (line[bytes_read] != '\0') {
  97       error_msg = "Unrecognized trailing text after method pattern";
  98       delete bm;
  99       return NULL;
 100     }
 101     return bm;
 102   }
 103 
 104   bool match(methodHandle method) {
 105     for (BasicMatcher* current = this; current != NULL; current = current->next()) {
 106       if (current->matches(method)) {
 107         return true;
 108       }
 109     }
 110     return false;
 111   }
 112 
 113   void set_next(BasicMatcher* next) { _next = next; }
 114   BasicMatcher* next() { return _next; }
 115 
 116   void print(outputStream* st) { print_base(st); }
 117   void print_all(outputStream* st) {
 118     print_base(st);
 119     if (_next != NULL) {
 120       _next->print_all(st);
 121     }
 122   }
 123 };
 124 
 125 #endif // SHARE_VM_COMPILER_METHODMATCHER_HPP
 126