Usermode/libc - Fix time conversion code

[tpg/acess2.git] / Usermode / Libraries / libc++.so_src / exception_handling.cc

diff --git a/Usermode/Libraries/libc++.so_src/exception_handling.cc b/Usermode/Libraries/libc++.so_src/exception_handling.cc
index 44d029b..81d4605 100644 (file)
--- a/Usermode/Libraries/libc++.so_src/exception_handling.cc
+++ b/Usermode/Libraries/libc++.so_src/exception_handling.cc
@@ -1,4 +1,17 @@
 /*
+ * Acess2 C++ Support Library
+ * - By John Hodge (thePowersGang)
+ *
+ * exception_handling.cc
+ * - Exception handling code (defined by C++ ABI)
+ *
+ * References:
+ * - LLVM Exception handling
+ *  > http://llvm.org/docs/ExceptionHandling.html
+ * - Itanium C++ ABI
+ *  >http://mentorembedded.github.io/cxx-abi/abi-eh.html
+ * - HP's "aC++" Document, Ch 7 "Exception Handling Tables"
+ *  > http://mentorembedded.github.io/cxx-abi/exceptions.pdf
  */
 #include <typeinfo>
 #include <cstdint>
@@ -6,11 +19,22 @@
 #include <cstdlib>
 #include <cstring>
 #include <exception>
-#include "exception_handling.h"
+#include "exception_handling_cxxabi.h"
 
+#include <acess/sys.h>
 
- int   uncaught_exception_count;
-__cxa_exception        *uncaught_exception_top;
+#define DEBUG_ENABLED  1
+
+#if DEBUG_ENABLED
+# define       DEBUG(v...)     ::_SysDebug(v)
+#else
+# define       DEBUG(v...)     do{}while(0)
+#endif
+
+/*__thread*/ struct __cxa_eh_globals {
+       __cxa_exception *caughtExceptions;
+       unsigned  int   uncaughtExceptions;
+} eh_globals;
 
 /*__thread*/ struct {
        __cxa_exception info;
@@ -25,14 +49,24 @@ static bool TEST_AND_SET(bool& flag) {
 }
 
 // === CODE ===
+extern "C" __cxa_eh_globals *__cxa_get_globals(void)
+{
+       return &eh_globals;
+}
+extern "C" __cxa_eh_globals *__cxa_get_globals_fast(void)
+{
+       return &eh_globals;
+}
 extern "C" void __cxa_call_unexpected(void *)
 {
        // An unexpected exception was thrown from a function that lists its possible exceptions
+       _SysDebug("__cxa_call_unexpected - TODO");
        for(;;);
 }
 
 extern "C" void *__cxa_allocate_exception(size_t thrown_size)
 {
+       DEBUG("__cxa_allocate_exception(%i)", thrown_size);
        __cxa_exception *ret = static_cast<__cxa_exception*>( malloc( sizeof(__cxa_exception) + thrown_size ) );
        if( !ret ) {
                if( thrown_size <= sizeof(emergency_exception.buf) && TEST_AND_SET(emergency_exception_used) )
@@ -41,13 +75,16 @@ extern "C" void *__cxa_allocate_exception(size_t thrown_size)
                }
        }
        if( !ret ) {
+               _SysDebug("__cxa_allocate_exception - No free space");
                ::std::terminate();
        }
-       return ret;
+       DEBUG("__cxa_allocate_exception: return %p", ret+1);
+       return ret + 1;
 }
 
 extern "C" void __cxa_free_exception(void *thrown_exception)
 {
+       DEBUG("__cxa_free_exception(%p)", thrown_exception);
        if(thrown_exception == &emergency_exception.buf) {
                //assert(emergency_exception_used);
                emergency_exception_used = false;
@@ -60,40 +97,56 @@ extern "C" void __cxa_free_exception(void *thrown_exception)
 
 extern "C" void __cxa_throw(void *thrown_exception, std::type_info *tinfo, void (*dest)(void*))
 {
+       #if DEBUG_ENABLED
+       DEBUG("__cxa_throw(%p,%p,%p) '%s' by %p",
+               thrown_exception, tinfo, dest, tinfo->name(), __builtin_return_address(0)
+               );
+       {
+               const ::std::exception* e = reinterpret_cast<const ::std::exception*>(thrown_exception);
+               DEBUG("- e.what() = '%s'", e->what());
+       }
+       #endif
+
        __cxa_exception *except = static_cast<__cxa_exception*>( thrown_exception ) - 1;
        
+       except->unexpectedHandler = 0;
+       except->terminateHandler = 0;
        except->exceptionType = tinfo;
        except->exceptionDestructor = dest;
-       memcpy(&except->unwindHeader.exception_class, "Ac20C++\0", 8);
-       uncaught_exception_top ++;
+       memcpy(&except->unwindHeader.exception_class, EXCEPTION_CLASS_ACESS, 8);
+       __cxa_get_globals()->uncaughtExceptions ++;
        
-       _Unwind_RaiseException(thrown_exception);
+       int rv = _Unwind_RaiseException( &except->unwindHeader );
        
+       ::_SysDebug("__cxa_throw(%p,%s) :: UNCAUGHT %i", thrown_exception, tinfo->name(), rv);
        ::std::terminate();
 }
 
-extern "C" void *__cxa_begin_catch(void *exceptionObject)
+extern "C" void *__cxa_begin_catch(_Unwind_Exception *exceptionObject)
 {
-       __cxa_exception *except = static_cast<__cxa_exception*>( exceptionObject ) - 1;
+       __cxa_exception *except = reinterpret_cast<__cxa_exception*>( exceptionObject+1 )-1;
+       DEBUG("__cxa_begin_catch(%p) - except=%p", exceptionObject, except);
        
        except->handlerCount ++;
        
-       except->nextException = uncaught_exception_top;
-       uncaught_exception_top = except;
+       except->nextException = __cxa_get_globals()->caughtExceptions;
+       __cxa_get_globals()->caughtExceptions = except;
        
-       uncaught_exception_count --;
+       __cxa_get_globals_fast()->uncaughtExceptions --;
        
-       return except;
+       return except+1;
 }
 
 extern "C" void __cxa_end_catch()
 {
-       struct __cxa_exception  *except = uncaught_exception_top;
+       struct __cxa_exception  *except = __cxa_get_globals()->caughtExceptions;
+       DEBUG("__cxa_end_catch - %p", except);
        except->handlerCount --;
-       uncaught_exception_top = except->nextException;
+       __cxa_get_globals()->caughtExceptions = except->nextException;
        
        if( except->handlerCount == 0 ) {
                __cxa_free_exception(except+1);
        }
 }
 
+