It's multithreaded now, thanks to a boost mutex

mrw/stacktrace.cpp

@@ -9,6 +9,9 @@
     @license LGPL, see file <a href="license.html">COPYING</a>
 
     $Log$
+    Revision 1.14  2005/03/11 23:22:58  marc
+    It's multithreaded now, thanks to a boost mutex
+
     Revision 1.13  2005/02/28 07:28:37  marc
     typo
 
@@ -90,7 +93,7 @@ extern "C" {
        - in file file: /usr/include/demangle.h
        - of package:   binutils-2.15.90.0.1.1-31
 
-      An idiot unfortunately abused the C++ keyword @c typename as
+      Someone unfortunately abused the C++ keyword @c typename as
       variable name to @c cplus_demangle_fill_builtin_type, so I have
       to work around it.
   */      
@@ -199,6 +202,9 @@ const mrw::StackTrace& mrw::StackTrace::print(std::ostream& os) const
 //----------------------------------------------------------------------------
 mrw::StackTrace::CodePos mrw::StackTrace::translate(void* addr)
   throw(std::bad_exception) {
+#ifdef _REENTRANT
+  boost::recursive_mutex::scoped_lock lock(_mutex);
+#endif
   assert(sizeof(bfd_vma)>=sizeof(void*));
   bfd_vma vma_addr(reinterpret_cast<bfd_vma>(addr));
   std::map<Translator::key_type, std::string>::iterator
@@ -224,6 +230,9 @@ mrw::StackTrace::CodePos mrw::StackTrace::translate(void* addr)
 //----------------------------------------------------------------------------
 bool mrw::StackTrace::createSymtable(const std::string& fname, void* offs)
     throw(std::bad_exception) {
+#ifdef _REENTRANT
+  boost::recursive_mutex::scoped_lock lock(_mutex);
+#endif
   if (_dic.find(fname)!=_dic.end()) return true; // already loaded
   try {
     static DynamicLibrary lib("libbfd");
@@ -267,6 +276,9 @@ bool mrw::StackTrace::createSymtable(const std::string& fname, void* offs)
 //----------------------------------------------------------------------------
 bool mrw::StackTrace::createSymtable(const mrw::StackTrace::BinFiles& files)
   throw(std::bad_exception) {
+#ifdef _REENTRANT
+  boost::recursive_mutex::scoped_lock lock(_mutex);
+#endif
   bool success(true);
   for (BinFiles::const_iterator it(files.begin());
        it!=files.end(); ++it) {
@@ -353,3 +365,6 @@ std::map<mrw::StackTrace::Translator::key_type, std::string>
   mrw::StackTrace::_addrs;
 std::map<std::string, mrw::StackTrace::AutoBfd> mrw::StackTrace::_bfd;
 std::map<std::string, mrw::AutoPtr<asymbol*> > mrw::StackTrace::_syms;
+#ifdef _REENTRANT
+boost::recursive_mutex mrw::StackTrace::_mutex;
+#endif

mrw/stacktrace.hpp

@@ -9,6 +9,9 @@
     @license LGPL, see file <a href="license.html">COPYING</a>
 
     $Log$
+    Revision 1.14  2005/03/11 23:22:58  marc
+    It's multithreaded now, thanks to a boost mutex
+
     Revision 1.13  2005/02/18 15:48:56  marc
     Dynamic loading of libbfd, no more dependency on specific libbfd version!
 
@@ -62,9 +65,8 @@
 #include <sys/mman.h>
 #include <bfd.h>
 
-#ifdef __REENTRANT
-#warning "mrw::StackTrace is not thread safe yet!"
-#warning "It should work, but is at least untested..."
+#ifdef _REENTRANT
+#include <boost/thread/recursive_mutex.hpp>
 #endif
 
 namespace mrw {
@@ -119,7 +121,7 @@ namespace mrw {
       names, sorce file names and line numbers are evaluated.
 
       @note Method StackTrace::createSymtable must be called exactely
-      once, before evaluating the first stack trace.Best place is the
+      once, before evaluating the first stack trace. Best place is the
       first line of the @c main function.
 
       @note Debug information is required for compiling. You nee the
@@ -169,8 +171,8 @@ namespace mrw {
         CXXFLAGS="-g -fno-inline" ./configure && make clean check
       @endcode
 
-      @todo Add support for alternative symbol evaluation using @c
-      backtrace_symbols.
+      @todo Should I add support for alternative symbol evaluation using @c
+      backtrace_symbols? I think rather not...?
   */
   class StackTrace {
     public:
@@ -202,8 +204,8 @@ namespace mrw {
       /// evaluate the stack trace and print it to a stream
       const StackTrace& print(std::ostream& os) const throw(std::bad_exception);
       /// evaluates and returns all information from a raw address
-      static CodePos translate(void* addr)
-        throw(std::bad_exception);
+      /** @classmutex _mutex */
+      static CodePos translate(void* addr) throw(std::bad_exception);
     
       /** @brief read the symbol table from the executable file or a
           shared library
@@ -239,6 +241,8 @@ namespace mrw {
           @note If this method is called more than once for the same
           file, the symbols are created only the first time, so you
           don't loose too much time.
+          
+          @classmutex _mutex
        */
       static bool createSymtable(const std::string& fname="", void* offs=0)
         throw(std::bad_exception);
@@ -266,6 +270,8 @@ namespace mrw {
 
           @note This method calls the other one for all files in
           parameter @c files.
+          
+          @classmutex _mutex
       */
       static bool createSymtable(const BinFiles& files)
         throw(std::bad_exception);
@@ -282,6 +288,9 @@ namespace mrw {
       static std::map<Translator::key_type, std::string> _addrs;
       static std::map<std::string, AutoBfd> _bfd;
       static std::map<std::string, mrw::AutoPtr<asymbol*> > _syms;
+#ifdef _REENTRANT
+      static boost::recursive_mutex _mutex;
+#endif
       //................................................................ methods
       static BinFiles filename() throw(std::bad_exception);
       static void buildSectionMap(bfd*, asection*, void*)