8135068: Extract method matchers from CompilerOracle

Ecapsulate code to enable reuse

Reviewed-by: roland, kvn

hotspot/src/share/vm/compiler/methodMatcher.hpp

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+
+#ifndef SHARE_VM_COMPILER_METHODMATCHER_HPP
+#define SHARE_VM_COMPILER_METHODMATCHER_HPP
+
+#include "memory/allocation.inline.hpp"
+#include "runtime/handles.inline.hpp"
+#include "memory/resourceArea.hpp"
+
+class MethodMatcher : public CHeapObj<mtCompiler> {
+ public:
+  enum Mode {
+    Exact,
+    Prefix = 1,
+    Suffix = 2,
+    Substring = Prefix | Suffix,
+    Any,
+    Unknown = -1
+  };
+
+ protected:
+  Symbol*        _class_name;
+  Symbol*        _method_name;
+  Symbol*        _signature;
+  Mode           _class_mode;
+  Mode           _method_mode;
+
+ public:
+  Symbol* class_name() const { return _class_name; }
+  Mode class_mode() const { return _class_mode; }
+  Symbol* method_name() const { return _method_name; }
+  Mode method_mode() const { return _method_mode; }
+  Symbol* signature() const { return _signature; }
+
+  MethodMatcher();
+  ~MethodMatcher();
+
+  void init(Symbol* class_name, Mode class_mode, Symbol* method_name, Mode method_mode, Symbol* signature);
+  static void parse_method_pattern(char*& line, const char*& error_msg, MethodMatcher* m);
+  static void print_symbol(outputStream* st, Symbol* h, Mode mode);
+  bool matches(methodHandle method) const;
+  void print_base(outputStream* st);
+
+ private:
+  static bool canonicalize(char * line, const char *& error_msg);
+  bool match(Symbol* candidate, Symbol* match, Mode match_mode) const;
+};
+
+class BasicMatcher : public MethodMatcher {
+private:
+  BasicMatcher* _next;
+public:
+
+  BasicMatcher() : MethodMatcher(),
+    _next(NULL) {
+  }
+
+  BasicMatcher(BasicMatcher* next) :
+    _next(next) {
+  }
+
+  static BasicMatcher* parse_method_pattern(char* line, const char*& error_msg) {
+    assert(error_msg == NULL, "Dont call here with error_msg already set");
+    BasicMatcher* bm = new BasicMatcher();
+    MethodMatcher::parse_method_pattern(line, error_msg, bm);
+    if (error_msg != NULL) {
+      delete bm;
+      return NULL;
+    }
+
+    // check for bad trailing characters
+    int bytes_read = 0;
+    sscanf(line, "%*[ \t]%n", &bytes_read);
+    if (line[bytes_read] != '\0') {
+      error_msg = "Unrecognized trailing text after method pattern";
+      delete bm;
+      return NULL;
+    }
+    return bm;
+  }
+
+  bool match(methodHandle method) {
+    for (BasicMatcher* current = this; current != NULL; current = current->next()) {
+      if (current->matches(method)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  void set_next(BasicMatcher* next) { _next = next; }
+  BasicMatcher* next() { return _next; }
+
+  void print(outputStream* st) { print_base(st); }
+  void print_all(outputStream* st) {
+    print_base(st);
+    if (_next != NULL) {
+      _next->print_all(st);
+    }
+  }
+};
+
+#endif // SHARE_VM_COMPILER_METHODMATCHER_HPP
+