7071311: Decoder enhancement

Made decoder thread-safe

Reviewed-by: coleenp, kamg

hotspot/src/share/vm/utilities/decoder_elf.hpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2011, 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_UTILITIES_DECODER_ELF_HPP
+#define SHARE_VM_UTILITIES_DECODER_ELF_HPP
+
+#if !defined(_WINDOWS) && !defined(__APPLE__)
+
+#include "utilities/decoder.hpp"
+#include "utilities/elfFile.hpp"
+
+class ElfDecoder: public NullDecoder {
+
+public:
+  ElfDecoder() {
+    _opened_elf_files = NULL;
+    _decoder_status = no_error;
+  }
+  ~ElfDecoder();
+
+  bool can_decode_C_frame_in_vm() const { return true; }
+
+  bool demangle(const char* symbol, char *buf, int buflen);
+  bool decode(address addr, char *buf, int buflen, int* offset, const char* filepath = NULL);
+
+private:
+  ElfFile*         get_elf_file(const char* filepath);
+
+private:
+  ElfFile*         _opened_elf_files;
+};
+
+#endif
+#endif // SHARE_VM_UTILITIES_DECODER_ELF_HPP