// Purpose: Misc debug functions and macros
// Author: Vadim Zeitlin
// Created: 29/01/98
-// RCS-ID: $Id$
// Copyright: (c) 1998-2009 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
//
// 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);
-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);
-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,
// 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,
// 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);
-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);
-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);
-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,
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) \
- 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
// 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
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