support SDK < 10.6, fixes #14902

[wxWidgets.git] / include / wx / debug.h

diff --git a/include/wx/debug.h b/include/wx/debug.h
index 851b405597f75d6fba6425843203df730ac4c8ae..ab68145fcfeb4dd9c4d020bdc9c916b8c6efa051 100644 (file)
--- a/include/wx/debug.h
+++ b/include/wx/debug.h
@@ -178,18 +178,18 @@ inline void wxDisableAsserts() { wxSetAssertHandler(NULL); }
 //
 // also notice that these functions can't be inline as wxString is not defined
 // yet (and can't be as wxString code itself may use assertions)
 //
 // also notice that these functions can't be inline as wxString is not defined
 // yet (and can't be as wxString code itself may use assertions)

-extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
+extern WXDLLIMPEXP_BASE void wxOnAssert(const char *file,

                                         int line,
                                         const char *func,
                                         const char *cond);
 
                                         int line,
                                         const char *func,
                                         const char *cond);
 

-extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
+extern WXDLLIMPEXP_BASE void wxOnAssert(const char *file,

                                         int line,
                                         const char *func,
                                         const char *cond,
                                         const char *msg);
 
                                         int line,
                                         const char *func,
                                         const char *cond,
                                         const char *msg);
 

-extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
+extern WXDLLIMPEXP_BASE void wxOnAssert(const char *file,

                                         int line,
                                         const char *func,
                                         const char *cond,
                                         int line,
                                         const char *func,
                                         const char *cond,


@@ -199,7 +199,7 @@ extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
 // this version is for compatibility with wx 2.8 Unicode build only, we don't
 // use it ourselves any more except in ANSI-only build in which case it is all
 // we need
 // this version is for compatibility with wx 2.8 Unicode build only, we don't
 // use it ourselves any more except in ANSI-only build in which case it is all
 // we need

-extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const wxChar *file,
+extern WXDLLIMPEXP_BASE void wxOnAssert(const wxChar *file,

                                         int line,
                                         const char *func,
                                         const wxChar *cond,
                                         int line,
                                         const char *func,
                                         const wxChar *cond,


@@ -208,24 +208,24 @@ extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const wxChar *file
 // these overloads work when msg passed to debug macro is a string and we
 // also have to provide wxCStrData overload to resolve ambiguity which would
 // otherwise arise from wxASSERT( s.c_str() )
 // these overloads work when msg passed to debug macro is a string and we
 // also have to provide wxCStrData overload to resolve ambiguity which would
 // otherwise arise from wxASSERT( s.c_str() )

-extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const wxString& file,
+extern WXDLLIMPEXP_BASE void wxOnAssert(const wxString& file,

                                         int line,
                                         const wxString& func,
                                         const wxString& cond,
                                         const wxString& msg);
 
                                         int line,
                                         const wxString& func,
                                         const wxString& cond,
                                         const wxString& msg);
 

-extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const wxString& file,
+extern WXDLLIMPEXP_BASE void wxOnAssert(const wxString& file,

                                         int line,
                                         const wxString& func,
                                         const wxString& cond);
 
                                         int line,
                                         const wxString& func,
                                         const wxString& cond);
 

-extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
+extern WXDLLIMPEXP_BASE void wxOnAssert(const char *file,

                                         int line,
                                         const char *func,
                                         const char *cond,
                                         const wxCStrData& msg);
 
                                         int line,
                                         const char *func,
                                         const char *cond,
                                         const wxCStrData& msg);
 

-extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
+extern WXDLLIMPEXP_BASE void wxOnAssert(const char *file,

                                         int line,
                                         const char *func,
                                         const char *cond,
                                         int line,
                                         const char *func,
                                         const char *cond,


@@ -251,22 +251,41 @@ extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
     this macro only does anything if wxDEBUG_LEVEL >= 2.
  */
 #if wxDEBUG_LEVEL
     this macro only does anything if wxDEBUG_LEVEL >= 2.
  */
 #if wxDEBUG_LEVEL

-    // call this function to break into the debugger unconditionally (assuming
-    // the program is running under debugger, of course)
-    extern void WXDLLIMPEXP_BASE wxTrap();
-
-    // assert checks if the condition is true and calls the assert handler with
-    // the provided message if it isn't
+    // wxTrap() can be used to break into the debugger unconditionally
+    // (assuming the program is running under debugger, of course).
+    //
+    // If possible, we prefer to define it as a macro rather than as a function
+    // to open the debugger at the position where we trapped and not inside the
+    // trap function itself which is not very useful.
+    #if wxCHECK_VISUALC_VERSION(7)
+        #define wxTrap() __debugbreak()
+    #else
+        extern WXDLLIMPEXP_BASE void wxTrap();
+    #endif // Win VisualC
+
+    // Global flag used to indicate that assert macros should call wxTrap(): it
+    // is set by the default assert handler if the user answers yes to the
+    // question of whether to trap.
+    extern WXDLLIMPEXP_DATA_BASE(bool) wxTrapInAssert;
+
+    // This macro checks if the condition is true and calls the assert handler
+    // with the provided message if it isn't and finally traps if the special
+    // flag indicating that it should do it was set by the handler.

     //
     //

-    // NB: the macro is defined like this to ensure that nested if/else
-    //     statements containing it are compiled in the same way whether it is
-    //     defined as empty or not; also notice that we can't use ";" instead
-    //     of "{}" as some compilers warn about "possible unwanted ;" then
+    // Notice that we don't use the handler return value for compatibility
+    // reasons (if we changed its return type, we'd need to change wxApp::
+    // OnAssertFailure() too which would break user code overriding it), hence
+    // the need for the ugly global flag.

     #define wxASSERT_MSG(cond, msg)                                           \
     #define wxASSERT_MSG(cond, msg)                                           \

-        if ( !wxTheAssertHandler || (cond) )                                  \
-        {}                                                                    \
-        else                                                                  \
-            wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__, #cond, msg)
+        wxSTATEMENT_MACRO_BEGIN                                               \
+            if ( wxTheAssertHandler && !(cond) &&                             \
+                    (wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__,           \
+                                #cond, msg), wxTrapInAssert) )                \
+            {                                                                 \
+                wxTrapInAssert = false;                                       \
+                wxTrap();                                                     \
+            }                                                                 \
+        wxSTATEMENT_MACRO_END

 
     // a version without any additional message, don't use unless condition
     // itself is fully self-explanatory
 
     // a version without any additional message, don't use unless condition
     // itself is fully self-explanatory


@@ -274,11 +293,17 @@ extern WX_ATTRIBUTE_NORETURN WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
 
     // wxFAIL is a special form of assert: it always triggers (and so is
     // usually used in normally unreachable code)
 
     // wxFAIL is a special form of assert: it always triggers (and so is
     // usually used in normally unreachable code)

-    #define wxFAIL_COND_MSG(cond, msg) \
-        if ( !wxTheAssertHandler )                                            \
-        {}                                                                    \
-        else                                                                  \
-            wxOnAssert(__FILE__, __LINE__,  __WXFUNCTION__, cond, msg)
+    #define wxFAIL_COND_MSG(cond, msg)                                        \
+        wxSTATEMENT_MACRO_BEGIN                                               \
+            if ( wxTheAssertHandler &&                                        \
+                    (wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__,           \
+                                #cond, msg), wxTrapInAssert) )                \
+            {                                                                 \
+                wxTrapInAssert = false;                                       \
+                wxTrap();                                                     \
+            }                                                                 \
+        wxSTATEMENT_MACRO_END
+

     #define wxFAIL_MSG(msg) wxFAIL_COND_MSG("Assert failure", msg)
     #define wxFAIL wxFAIL_MSG((const char*)NULL)
 #else // !wxDEBUG_LEVEL
     #define wxFAIL_MSG(msg) wxFAIL_COND_MSG("Assert failure", msg)
     #define wxFAIL wxFAIL_MSG((const char*)NULL)
 #else // !wxDEBUG_LEVEL