lex_(lex), lineno_(0), charpos_(0), lex_mode_stack_(), inputs_(NULL)
{
// We start out processing C symbols in the default lex mode.
- language_stack_.push_back("");
- lex_mode_stack_.push_back(lex->mode());
+ this->language_stack_.push_back(Version_script_info::LANGUAGE_C);
+ this->lex_mode_stack_.push_back(lex->mode());
}
// Return the file name.
// Return the current language being processed in a version script
// (eg, "C++"). The empty string represents unmangled C names.
- const std::string&
+ Version_script_info::Language
get_current_language() const
{ return this->language_stack_.back(); }
// Push a language onto the stack when entering an extern block.
- void push_language(const std::string& lang)
+ void
+ push_language(Version_script_info::Language lang)
{ this->language_stack_.push_back(lang); }
// Pop a language off of the stack when exiting an extern block.
- void pop_language()
+ void
+ pop_language()
{
gold_assert(!this->language_stack_.empty());
this->language_stack_.pop_back();
std::vector<Lex::Mode> lex_mode_stack_;
// A stack of which extern/language block we're inside. Can be C++,
// java, or empty for C.
- std::vector<std::string> language_stack_;
+ std::vector<Version_script_info::Language> language_stack_;
// New input files found to add to the link.
Input_arguments* inputs_;
};
return ktt->parsecode;
}
-// Helper class that calls cplus_demangle when needed and takes care of freeing
-// the result.
-
-class Lazy_demangler
-{
- public:
- Lazy_demangler(const char* symbol, int options)
- : symbol_(symbol), options_(options), demangled_(NULL), did_demangle_(false)
- { }
-
- ~Lazy_demangler()
- { free(this->demangled_); }
-
- // Return the demangled name. The actual demangling happens on the first call,
- // and the result is later cached.
-
- inline char*
- get();
-
- private:
- // The symbol to demangle.
- const char *symbol_;
- // Option flags to pass to cplus_demagle.
- const int options_;
- // The cached demangled value, or NULL if demangling didn't happen yet or
- // failed.
- char *demangled_;
- // Whether we already called cplus_demangle
- bool did_demangle_;
-};
-
-// Return the demangled name. The actual demangling happens on the first call,
-// and the result is later cached. Returns NULL if the symbol cannot be
-// demangled.
-
-inline char*
-Lazy_demangler::get()
-{
- if (!this->did_demangle_)
- {
- this->demangled_ = cplus_demangle(this->symbol_, this->options_);
- this->did_demangle_ = true;
- }
- return this->demangled_;
-}
-
// The following structs are used within the VersionInfo class as well
// as in the bison helper functions. They store the information
// parsed from the version script.
// A single version expression.
// For example, pattern="std::map*" and language="C++".
-// pattern and language should be from the stringpool
-struct Version_expression {
- Version_expression(const std::string& pattern,
- const std::string& language,
- bool exact_match)
- : pattern(pattern), language(language), exact_match(exact_match) {}
+// PATTERN should be from the stringpool.
+struct
+Version_expression
+{
+ Version_expression(const std::string& a_pattern,
+ Version_script_info::Language a_language,
+ bool a_exact_match)
+ : pattern(a_pattern), language(a_language), exact_match(a_exact_match)
+ { }
std::string pattern;
- std::string language;
+ Version_script_info::Language language;
// If false, we use glob() to match pattern. If true, we use strcmp().
bool exact_match;
};
// A list of expressions.
-struct Version_expression_list {
+struct Version_expression_list
+{
std::vector<struct Version_expression> expressions;
};
-
// A list of which versions upon which another version depends.
// Strings should be from the Stringpool.
-struct Version_dependency_list {
+struct Version_dependency_list
+{
std::vector<std::string> dependencies;
};
-
// The total definition of a version. It includes the tag for the
// version, its global and local expressions, and any dependencies.
-struct Version_tree {
+struct Version_tree
+{
Version_tree()
- : tag(), global(NULL), local(NULL), dependencies(NULL) {}
+ : tag(), global(NULL), local(NULL), dependencies(NULL)
+ { }
std::string tag;
const struct Version_expression_list* global;
const struct Version_dependency_list* dependencies;
};
+// Class Version_script_info.
+
+Version_script_info::Version_script_info()
+ : dependency_lists_(), expression_lists_(), version_trees_(),
+ is_finalized_(false)
+{
+ for (int i = 0; i < LANGUAGE_COUNT; ++i)
+ {
+ this->globals_[i] = NULL;
+ this->locals_[i] = NULL;
+ }
+}
+
Version_script_info::~Version_script_info()
{
- this->clear();
}
+// Forget all the known version script information.
+
void
Version_script_info::clear()
{
- for (size_t k = 0; k < dependency_lists_.size(); ++k)
- delete dependency_lists_[k];
+ for (size_t k = 0; k < this->dependency_lists_.size(); ++k)
+ delete this->dependency_lists_[k];
this->dependency_lists_.clear();
- for (size_t k = 0; k < version_trees_.size(); ++k)
- delete version_trees_[k];
+ for (size_t k = 0; k < this->version_trees_.size(); ++k)
+ delete this->version_trees_[k];
this->version_trees_.clear();
- for (size_t k = 0; k < expression_lists_.size(); ++k)
- delete expression_lists_[k];
+ for (size_t k = 0; k < this->expression_lists_.size(); ++k)
+ delete this->expression_lists_[k];
this->expression_lists_.clear();
}
+// Finalize the version script information.
+
+void
+Version_script_info::finalize()
+{
+ if (!this->is_finalized_)
+ {
+ this->build_lookup_tables();
+ this->is_finalized_ = true;
+ }
+}
+
+// Return all the versions.
+
std::vector<std::string>
Version_script_info::get_versions() const
{
std::vector<std::string> ret;
- for (size_t j = 0; j < version_trees_.size(); ++j)
+ for (size_t j = 0; j < this->version_trees_.size(); ++j)
if (!this->version_trees_[j]->tag.empty())
ret.push_back(this->version_trees_[j]->tag);
return ret;
}
+// Return the dependencies of VERSION.
+
std::vector<std::string>
Version_script_info::get_dependencies(const char* version) const
{
std::vector<std::string> ret;
- for (size_t j = 0; j < version_trees_.size(); ++j)
- if (version_trees_[j]->tag == version)
+ for (size_t j = 0; j < this->version_trees_.size(); ++j)
+ if (this->version_trees_[j]->tag == version)
{
const struct Version_dependency_list* deps =
- version_trees_[j]->dependencies;
+ this->version_trees_[j]->dependencies;
if (deps != NULL)
for (size_t k = 0; k < deps->dependencies.size(); ++k)
ret.push_back(deps->dependencies[k]);
return ret;
}
+// Build a set of fast lookup tables for a version script.
+
+void
+Version_script_info::build_lookup_tables()
+{
+ size_t size = this->version_trees_.size();
+ for (size_t j = 0; j < size; ++j)
+ {
+ const Version_tree* v = this->version_trees_[j];
+ this->build_expression_list_lookup(v->global, v, &this->globals_[0]);
+ this->build_expression_list_lookup(v->local, v, &this->locals_[0]);
+ }
+}
+
+// Build fast lookup information for EXPLIST and store it in LOOKUP.
+
+void
+Version_script_info::build_expression_list_lookup(
+ const Version_expression_list* explist,
+ const Version_tree* v,
+ Lookup** lookup)
+{
+ if (explist == NULL)
+ return;
+ size_t size = explist->expressions.size();
+ for (size_t j = 0; j < size; ++j)
+ {
+ const Version_expression& exp(explist->expressions[j]);
+ Lookup **pp = &lookup[exp.language];
+ if (*pp == NULL)
+ *pp = new Lookup();
+ Lookup* p = *pp;
+
+ if (!exp.exact_match && strpbrk(exp.pattern.c_str(), "?*[") != NULL)
+ p->globs.push_back(Glob(exp.pattern.c_str(), v));
+ else
+ {
+ std::pair<Exact::iterator, bool> ins =
+ p->exact.insert(std::make_pair(exp.pattern, v));
+ if (!ins.second)
+ {
+ const Version_tree* v1 = ins.first->second;
+ if (v1->tag != v->tag)
+ gold_error(_("'%s' appears in version script with both "
+ "versions '%s' and '%s'"),
+ exp.pattern.c_str(), v1->tag.c_str(),
+ v->tag.c_str());
+ }
+ }
+ }
+}
+
// Look up SYMBOL_NAME in the list of versions. If CHECK_GLOBAL is
// true look at the globally visible symbols, otherwise look at the
// symbols listed as "local:". Return true if the symbol is found,
bool check_global,
std::string* pversion) const
{
- Lazy_demangler cpp_demangled_name(symbol_name, DMGL_ANSI | DMGL_PARAMS);
- Lazy_demangler java_demangled_name(symbol_name,
- DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
- for (size_t j = 0; j < version_trees_.size(); ++j)
+ gold_assert(this->is_finalized_);
+ const Lookup* const * pp = (check_global
+ ? &this->globals_[0]
+ : &this->locals_[0]);
+ for (int i = 0; i < LANGUAGE_COUNT; ++i)
{
- // Is it a global symbol for this version?
- const Version_expression_list* explist =
- check_global ? version_trees_[j]->global : version_trees_[j]->local;
- if (explist != NULL)
- for (size_t k = 0; k < explist->expressions.size(); ++k)
- {
- const char* name_to_match = symbol_name;
- const struct Version_expression& exp = explist->expressions[k];
- if (exp.language == "C++")
- {
- name_to_match = cpp_demangled_name.get();
- // This isn't a C++ symbol.
- if (name_to_match == NULL)
- continue;
- }
- else if (exp.language == "Java")
- {
- name_to_match = java_demangled_name.get();
- // This isn't a Java symbol.
- if (name_to_match == NULL)
- continue;
- }
- bool matched;
- if (exp.exact_match)
- matched = strcmp(exp.pattern.c_str(), name_to_match) == 0;
- else
- matched = fnmatch(exp.pattern.c_str(), name_to_match,
- FNM_NOESCAPE) == 0;
- if (matched)
- {
- if (pversion != NULL)
- *pversion = this->version_trees_[j]->tag;
- return true;
- }
- }
+ const Lookup* lookup = pp[i];
+ if (lookup == NULL)
+ continue;
+
+ const char* name_to_match;
+ char* allocated;
+ switch (i)
+ {
+ case LANGUAGE_C:
+ allocated = NULL;
+ name_to_match = symbol_name;
+ break;
+ case LANGUAGE_CXX:
+ allocated = cplus_demangle(symbol_name, DMGL_ANSI | DMGL_PARAMS);
+ if (allocated == NULL)
+ continue;
+ name_to_match = allocated;
+ break;
+ case LANGUAGE_JAVA:
+ allocated = cplus_demangle(symbol_name,
+ DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
+ if (allocated == NULL)
+ continue;
+ name_to_match = allocated;
+ default:
+ gold_unreachable();
+ }
+
+ Exact::const_iterator pe = lookup->exact.find(name_to_match);
+ if (pe != lookup->exact.end())
+ {
+ if (pversion != NULL)
+ *pversion = pe->second->tag;
+ if (allocated != NULL)
+ free (allocated);
+ return true;
+ }
+
+ for (std::vector<Glob>::const_iterator pg = lookup->globs.begin();
+ pg != lookup->globs.end();
+ ++pg)
+ {
+ // Check for * specially since it is fairly common.
+ if ((pg->pattern[0] == '*' && pg->pattern[1] == '\0')
+ || fnmatch(pg->pattern, name_to_match, FNM_NOESCAPE) == 0)
+ {
+ if (pversion != NULL)
+ *pversion = pg->version->tag;
+ if (allocated != NULL)
+ free (allocated);
+ return true;
+ }
+ }
+
+ if (allocated != NULL)
+ free (allocated);
}
+
return false;
}
FILE* f,
const Version_expression_list* vel) const
{
- std::string current_language;
+ Version_script_info::Language current_language = LANGUAGE_C;
for (size_t i = 0; i < vel->expressions.size(); ++i)
{
const Version_expression& ve(vel->expressions[i]);
if (ve.language != current_language)
{
- if (!current_language.empty())
+ if (current_language != LANGUAGE_C)
fprintf(f, " }\n");
- fprintf(f, " extern \"%s\" {\n", ve.language.c_str());
+ switch (ve.language)
+ {
+ case LANGUAGE_C:
+ break;
+ case LANGUAGE_CXX:
+ fprintf(f, " extern \"C++\" {\n");
+ break;
+ case LANGUAGE_JAVA:
+ fprintf(f, " extern \"Java\" {\n");
+ break;
+ default:
+ gold_unreachable();
+ }
current_language = ve.language;
}
fprintf(f, " ");
- if (!current_language.empty())
+ if (current_language != LANGUAGE_C)
fprintf(f, " ");
if (ve.exact_match)
fprintf(f, "\n");
}
- if (!current_language.empty())
+ if (current_language != LANGUAGE_C)
fprintf(f, " }\n");
}
script_push_lex_into_version_mode(void* closurev)
{
Parser_closure* closure = static_cast<Parser_closure*>(closurev);
+ if (closure->version_script()->is_finalized())
+ gold_error(_("%s:%d:%d: invalid use of VERSION in input file"),
+ closure->filename(), closure->lineno(), closure->charpos());
closure->push_lex_mode(Lex::VERSION_SCRIPT);
}
}
// Add a pattern expression to an existing list of expressions, if any.
-// TODO: In the old linker, the last argument used to be a bool, but I
-// don't know what it meant.
extern "C" struct Version_expression_list *
script_new_vers_pattern(void* closurev,
version_script_push_lang(void* closurev, const char* lang, int langlen)
{
Parser_closure* closure = static_cast<Parser_closure*>(closurev);
- closure->push_language(std::string(lang, langlen));
+ std::string language(lang, langlen);
+ Version_script_info::Language code;
+ if (language.empty() || language == "C")
+ code = Version_script_info::LANGUAGE_C;
+ else if (language == "C++")
+ code = Version_script_info::LANGUAGE_CXX;
+ else if (language == "Java")
+ code = Version_script_info::LANGUAGE_JAVA;
+ else
+ {
+ char* buf = new char[langlen + 100];
+ snprintf(buf, langlen + 100,
+ _("unrecognized version script language '%s'"),
+ language.c_str());
+ yyerror(closurev, buf);
+ delete[] buf;
+ code = Version_script_info::LANGUAGE_C;
+ }
+ closure->push_language(code);
}
extern "C" void
class Version_script_info
{
public:
+ // The languages which can be specified in a versionn script.
+ enum Language
+ {
+ LANGUAGE_C, // No demangling.
+ LANGUAGE_CXX, // C++ demangling.
+ LANGUAGE_JAVA, // Java demangling.
+ LANGUAGE_COUNT
+ };
+
+ Version_script_info();
+
~Version_script_info();
// Clear everything.
void
clear();
+ // Finalize the version control information.
+ void
+ finalize();
+
+ // Return whether the information is finalized.
+ bool
+ is_finalized() const
+ { return this->is_finalized_; }
+
// Return whether any version were defined in the version script.
bool
empty() const
{ return this->get_symbol_version_helper(symbol, false, NULL); }
// Return the names of versions defined in the version script.
- // Strings are allocated out of the stringpool given in the
- // constructor.
std::vector<std::string>
get_versions() const;
struct Version_tree*
allocate_version_tree();
+ // Build the lookup tables after all data have been read.
+ void
+ build_lookup_tables();
+
// Print contents to the FILE. This is for debugging.
void
print(FILE*) const;
void
print_expression_list(FILE* f, const Version_expression_list*) const;
- bool get_symbol_version_helper(const char* symbol,
- bool check_global,
- std::string* pversion) const;
+ bool
+ get_symbol_version_helper(const char* symbol,
+ bool check_global,
+ std::string* pversion) const;
+
+ // Fast lookup information for a glob pattern.
+ struct Glob
+ {
+ Glob()
+ : pattern(NULL), version(NULL)
+ { }
+
+ Glob(const char* p, const Version_tree* v)
+ : pattern(p), version(v)
+ { }
+
+ // A pointer to the glob pattern. The pattern itself lives in a
+ // Version_expression structure.
+ const char* pattern;
+ // The Version_tree we use if this pattern matches.
+ const Version_tree* version;
+ };
+
+ // Fast lookup information for a given language.
+
+ typedef Unordered_map<std::string, const Version_tree*> Exact;
+
+ 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;
+ };
- std::vector<struct Version_dependency_list*> dependency_lists_;
- std::vector<struct Version_expression_list*> expression_lists_;
- std::vector<struct Version_tree*> version_trees_;
+ void
+ build_expression_list_lookup(const Version_expression_list*,
+ const Version_tree*, Lookup**);
+
+ // All the version dependencies we allocate.
+ std::vector<Version_dependency_list*> dependency_lists_;
+ // All the version expressions we allocate.
+ 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];
+ // Whether this has been finalized.
+ bool is_finalized_;
};
// This class manages assignments to symbols. These can appear in
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