// script.h -- handle linker scripts for gold -*- C++ -*-
-// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
struct Version_dependency_list;
struct Version_expression_list;
struct Version_tree;
+struct Version_expression;
+class Lazy_demangler;
// This class represents an expression in a linker script.
{ return this->version_trees_.empty(); }
// If there is a version associated with SYMBOL, return true, and
- // set *VERSION to the version. Otherwise, return false.
+ // set *VERSION to the version, and *IS_GLOBAL to whether the symbol
+ // should be global. Otherwise, return false.
bool
- get_symbol_version(const char* symbol, std::string* version) const
- { return this->get_symbol_version_helper(symbol, true, version); }
+ get_symbol_version(const char* symbol, std::string* version,
+ bool* is_global) const;
// Return whether this symbol matches the local: section of some
// version.
bool
symbol_is_local(const char* symbol) const
- { return this->get_symbol_version_helper(symbol, false, NULL); }
+ {
+ bool is_global;
+ return (this->get_symbol_version(symbol, NULL, &is_global)
+ && !is_global);
+ }
// Return the names of versions defined in the version script.
std::vector<std::string>
void
build_lookup_tables();
+ // Give an error if there are any unmatched names in the version
+ // script.
+ void
+ check_unmatched_names(const Symbol_table*) const;
+
// Print contents to the FILE. This is for debugging.
void
print(FILE*) const;
bool check_global,
std::string* pversion) const;
+ // Fast lookup information for a given language.
+
+ // We map from exact match strings to Version_tree's. Historically
+ // version scripts sometimes have the same symbol multiple times,
+ // which is ambiguous. We warn about that case by storing the
+ // second Version_tree we see.
+ struct Version_tree_match
+ {
+ Version_tree_match(const Version_tree* r, bool ig,
+ const Version_expression* e)
+ : real(r), is_global(ig), expression(e), ambiguous(NULL)
+ { }
+
+ // The Version_tree that we return.
+ const Version_tree* real;
+ // True if this is a global match for the REAL member, false if it
+ // is a local match.
+ bool is_global;
+ // Point back to the Version_expression for which we created this
+ // match.
+ const Version_expression* expression;
+ // If not NULL, another Version_tree that defines the symbol.
+ const Version_tree* ambiguous;
+ };
+
+ // Map from an exact match string to a Version_tree.
+
+ typedef Unordered_map<std::string, Version_tree_match> Exact;
+
// Fast lookup information for a glob pattern.
struct Glob
{
Glob()
- : pattern(NULL), version(NULL)
+ : expression(NULL), version(NULL), is_global(false)
{ }
- Glob(const char* p, const Version_tree* v)
- : pattern(p), version(v)
+ Glob(const Version_expression* e, const Version_tree* v, bool ig)
+ : expression(e), version(v), is_global(ig)
{ }
- // A pointer to the glob pattern. The pattern itself lives in a
- // Version_expression structure.
- const char* pattern;
+ // A pointer to the version expression holding the pattern to
+ // match and the language to use for demangling the symbol before
+ // doing the match.
+ const Version_expression* expression;
// The Version_tree we use if this pattern matches.
const Version_tree* version;
+ // True if this is a global symbol.
+ bool is_global;
};
- // Fast lookup information for a given language.
+ typedef std::vector<Glob> Globs;
- typedef Unordered_map<std::string, const Version_tree*> Exact;
+ bool
+ unquote(std::string*) const;
- struct Lookup
- {
- // A hash table of all exact match strings mapping to a
- // Version_tree.
- Exact exact;
- // A vector of glob patterns mapping to Version_trees.
- std::vector<Glob> globs;
- };
+ void
+ add_exact_match(const std::string&, const Version_tree*, bool is_global,
+ const Version_expression*, Exact*);
void
build_expression_list_lookup(const Version_expression_list*,
- const Version_tree*, Lookup**);
+ const Version_tree*, bool);
+
+ const char*
+ get_name_to_match(const char*, int,
+ Lazy_demangler*, Lazy_demangler*) const;
// All the version dependencies we allocate.
std::vector<Version_dependency_list*> dependency_lists_;
std::vector<Version_expression_list*> expression_lists_;
// The list of versions.
std::vector<Version_tree*> version_trees_;
- // Lookup information for global symbols, by language.
- Lookup* globals_[LANGUAGE_COUNT];
- // Lookup information for local symbols, by language.
- Lookup* locals_[LANGUAGE_COUNT];
+ // Exact matches for global symbols, by language.
+ Exact* exact_[LANGUAGE_COUNT];
+ // A vector of glob patterns mapping to Version_trees.
+ Globs globs_;
+ // The default version to use, if there is one. This is from a
+ // pattern of "*".
+ const Version_tree* default_version_;
+ // True if the default version is global.
+ bool default_is_global_;
// Whether this has been finalized.
bool is_finalized_;
};