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* script.cc (Lazy_demangler): New class.

Browse Source 
(Version_script_info::get_symbol_version_helper): Demangle a
	symbol only once.
This commit is contained in:
Ian Lance Taylor 2009-02-01 00:45:28 +00:00
parent 42c26fd59b
commit 88a0e15ba8
2 changed files with 59 additions and 12 deletions
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6
gold/ChangeLog
View File

@ -1,3 +1,9 @@
2009-01-31 Mikolaj Zalewski <mikolajz@google.com>
* script.cc (Lazy_demangler): New class.
(Version_script_info::get_symbol_version_helper): Demangle a
symbol only once.
2009-01-29 Cary Coutant <ccoutant@google.com>
* i386.cc (Target_i386::Relocate::relocate): Recognize non-PIC calls

65
gold/script.cc
View File

@ -1699,6 +1699,52 @@ Keyword_to_parsecode::keyword_to_parsecode(const char* keyword,
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.
@ -1801,6 +1847,9 @@ Version_script_info::get_symbol_version_helper(const char* symbol_name,
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)
{
// Is it a global symbol for this version?
@ -1811,25 +1860,19 @@ Version_script_info::get_symbol_version_helper(const char* symbol_name,
{
const char* name_to_match = symbol_name;
const struct Version_expression& exp = explist->expressions[k];
char* demangled_name = NULL;
if (exp.language == "C++")
{
demangled_name = cplus_demangle(symbol_name,
DMGL_ANSI | DMGL_PARAMS);
name_to_match = cpp_demangled_name.get();
// This isn't a C++ symbol.
if (demangled_name == NULL)
if (name_to_match == NULL)
continue;
name_to_match = demangled_name;
}
else if (exp.language == "Java")
{
demangled_name = cplus_demangle(symbol_name,
(DMGL_ANSI | DMGL_PARAMS
| DMGL_JAVA));
name_to_match = java_demangled_name.get();
// This isn't a Java symbol.
if (demangled_name == NULL)
if (name_to_match == NULL)
continue;
name_to_match = demangled_name;
}
bool matched;
if (exp.exact_match)
@ -1837,8 +1880,6 @@ Version_script_info::get_symbol_version_helper(const char* symbol_name,
else
matched = fnmatch(exp.pattern.c_str(), name_to_match,
FNM_NOESCAPE) == 0;
if (demangled_name != NULL)
free(demangled_name);
if (matched)
{
if (pversion != NULL)