Stringpool stats. Also make Symbol_table support functions inline.

[deliverable/binutils-gdb.git] / gold / stringpool.h

diff --git a/gold/stringpool.h b/gold/stringpool.h
index cdd36e7b9ddaa9b30d58f7db0fc09726659cf926..c5a3baf884bae628b14e39f44a80c64bd1c7f191 100644 (file)
--- a/gold/stringpool.h
+++ b/gold/stringpool.h
@@ -1,5 +1,25 @@
 // stringpool.h -- a string pool for gold    -*- C++ -*-
 
+// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program 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 for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
 #include <string>
 #include <list>
 
@@ -27,8 +47,9 @@ class Output_file;
 // string pointer so that repeated runs of the linker will generate
 // precisely the same output.
 
-// When you add a string to a Stringpool, Stringpool will make a copy
-// of it.  Thus there is no need to keep a copy elsewhere.
+// When you add a string to a Stringpool, Stringpool will optionally
+// make a copy of it.  Thus there is no requirement to keep a copy
+// elsewhere.
 
 // A Stringpool can be turned into a string table, a sequential series
 // of null terminated strings.  The first string may optionally be a
@@ -58,28 +79,32 @@ class Stringpool_template
   // is never a valid key value.
   typedef size_t Key;
 
-  // Create a Stringpool.  ZERO_NULL is true if we should reserve
-  // offset 0 to hold the empty string when converting the stringpool
-  // to a string table.  ZERO_NULL should be true if you want a proper
-  // ELF SHT_STRTAB section.
-  Stringpool_template(bool zero_null = true);
+  // Create a Stringpool.
+  Stringpool_template();
 
   ~Stringpool_template();
 
-  // Add the string S to the pool.  This returns a canonical permanent
-  // pointer to the string in the pool.  If PKEY is not NULL, this
-  // sets *PKEY to the key for the string.
-  const Stringpool_char*
-  add(const Stringpool_char* s, Key* pkey);
+  // Clear all the data from the stringpool.
+  void
+  clear();
 
-  // Add the string S to the pool.
+  // Indicate that we should not reserve offset 0 to hold the empty
+  // string when converting the stringpool to a string table.  This
+  // should not be called for a proper ELF SHT_STRTAB section.
+  void
+  set_no_zero_null()
+  { this->zero_null_ = false; }
+
+  // Add the string S to the pool.  This returns a canonical permanent
+  // pointer to the string in the pool.  If COPY is true, the string
+  // is copied into permanent storage.  If PKEY is not NULL, this sets
+  // *PKEY to the key for the string.
   const Stringpool_char*
-  add(const std::basic_string<Stringpool_char>& s, Key* pkey)
-  { return this->add(s.c_str(), pkey); }
+  add(const Stringpool_char* s, bool copy, Key* pkey);
 
   // Add the prefix of length LEN of string S to the pool.
   const Stringpool_char*
-  add(const Stringpool_char* s, size_t len, Key* pkey);
+  add_prefix(const Stringpool_char* s, size_t len, Key* pkey);
 
   // If the string S is present in the pool, return the canonical
   // string pointer.  Otherwise, return NULL.  If PKEY is not NULL,
@@ -118,6 +143,16 @@ class Stringpool_template
   void
   write(Output_file*, off_t offset);
 
+  // Write the string table into the specified buffer, of the
+  // specified size.  buffer_size should be at least
+  // get_strtab_size().
+  void
+  write_to_buffer(unsigned char* buffer, size_t buffer_size);
+
+  // Dump statistical information to stderr.
+  void
+  print_stats(const char*) const;
+
  private:
   Stringpool_template(const Stringpool_template&);
   Stringpool_template& operator=(const Stringpool_template&);
@@ -208,6 +243,8 @@ class Stringpool_template
   off_t strtab_size_;
   // Next Stringdata index.
   unsigned int next_index_;
+  // Next key value for a string we don't copy.
+  int next_uncopied_key_;
   // Whether to reserve offset 0 to hold the null string.
   bool zero_null_;
 };