Added ability to break into debugger on Windows and Mac

catch_runner.hpp

@@ -53,7 +53,7 @@ namespace Catch
             config.getReporterConfig().setStreamBuf( ofs.rdbuf() );
         }
 
-        Runner runner( config.getReporter() );
+        Runner runner( config );
 
         // Run test specs specified on the command line - or default to all
         if( config.m_testSpecs.size() == 0 )

internal/catch_capture.hpp

@@ -13,6 +13,7 @@
 #define TWOBLUECUBES_CATCH_CAPTURE_HPP_INCLUDED
 
 #include "catch_resultinfo.hpp"
+#include "catch_debugger.hpp"
 #include <sstream>
 #include <cmath>
 
@@ -200,6 +201,18 @@ struct IResultListener
     virtual void sectionEnded( const std::string& name, std::size_t successes, std::size_t failures ) = 0;
     virtual void pushScopedInfo( ScopedInfo* scopedInfo ) = 0;
     virtual void popScopedInfo( ScopedInfo* scopedInfo ) = 0;
+    virtual bool shouldDebugBreak() const = 0;
+};
+  
+    struct ResultAction
+    {
+        enum Value
+        {
+            None,
+            Failed = 1,     // Failure - but no debug break if Debug bit not set
+            DebugFailed = 3 // Indicates that the debugger should break, if possible
+        };
+        
     };
     
 class ResultsCapture
@@ -230,20 +243,12 @@ public:
         instance().currentResult = resultInfo;
     }
 
-    static void acceptResult( bool result, bool stopOnFail )
+    static ResultAction::Value acceptResult( bool result )
     {
-        acceptResult( result ? ResultWas::Ok : ResultWas::ExpressionFailed, stopOnFail );
+        return acceptResult( result ? ResultWas::Ok : ResultWas::ExpressionFailed );
     }
     
-    static void acceptResult( ResultWas::OfType result, bool stopOnFail )
+    static ResultAction::Value acceptResult( ResultWas::OfType result )
-    {
-        if( !acceptResult( result ) && stopOnFail )
-        {
-            throw TestFailureException();
-        }
-    }
-    
-    static bool acceptResult( ResultWas::OfType result )
     {
         MutableResultInfo& currentResult = instance().currentResult;
         currentResult.setResultType( result );
@@ -254,12 +259,12 @@ public:
         }
         bool ok = currentResult.ok();
         instance().currentResult = MutableResultInfo();
-        return ok;
+        if( ok )
-    }
+            return ResultAction::None;
-
+        else if( instance().m_listener->shouldDebugBreak() )
-    static bool acceptResult( bool expressionResult )
+            return ResultAction::DebugFailed;
-    {
+        else
-        return acceptResult( expressionResult ? ResultWas::Ok : ResultWas::ExpressionFailed );
+            return ResultAction::Failed;
     }
 
     static void acceptMessage( const std::string& msg )
@@ -367,27 +372,34 @@ inline std::string toString<Approx>( const Approx& value )
     
 } // end namespace Catch
 
+#define INTERNAL_CATCH_ACCEPT_RESULT( result, stopOnFailure ) \
+    if( Catch::ResultAction::Value action = Catch::ResultsCapture::acceptResult( result )  ) \
+    { \
+        if( action == Catch::ResultAction::DebugFailed ) DebugBreak(); \
+        if( stopOnFailure ) throw Catch::TestFailureException(); \
+    }
+
 #define INTERNAL_CATCH_TEST( expr, isNot, stopOnFailure, macroName ) \
     Catch::ResultsCapture::acceptExpression( Catch::ResultBuilder( #expr, isNot, __FILE__, __LINE__, macroName )->*expr ); \
-    Catch::ResultsCapture::acceptResult( expr, stopOnFailure );
+    INTERNAL_CATCH_ACCEPT_RESULT( expr, stopOnFailure )
 
 #define INTERNAL_CATCH_THROWS( expr, exceptionType, nothrow, stopOnFailure, macroName ) \
     Catch::ResultsCapture::acceptExpression( Catch::ResultBuilder( #expr, false, __FILE__, __LINE__, macroName ) ); \
     try \
     { \
         expr; \
-        Catch::ResultsCapture::acceptResult( nothrow, stopOnFailure ); \
+        INTERNAL_CATCH_ACCEPT_RESULT( nothrow, stopOnFailure ) \
     } \
     catch( exceptionType ) \
     { \
-        Catch::ResultsCapture::acceptResult( !(nothrow), stopOnFailure ); \
+        INTERNAL_CATCH_ACCEPT_RESULT( !(nothrow), stopOnFailure ) \
     }
 
 #define INTERNAL_CATCH_THROWS_AS( expr, exceptionType, nothrow, stopOnFailure, macroName ) \
 INTERNAL_CATCH_THROWS( expr, exceptionType, nothrow, stopOnFailure, macroName ) \
 catch( ... ) \
 { \
-    Catch::ResultsCapture::acceptResult( false, stopOnFailure ); \
+    INTERNAL_CATCH_ACCEPT_RESULT( false, stopOnFailure ) \
 }
 
 #define INTERNAL_CATCH_MSG( reason, resultType, stopOnFailure, macroName ) \
@@ -395,7 +407,7 @@ catch( ... ) \
     INTERNAL_CATCH_UNIQUE_NAME( strm ) << reason; \
     Catch::ResultsCapture::acceptExpression( Catch::MutableResultInfo( "", false, __FILE__, __LINE__, macroName ) ); \
     Catch::ResultsCapture::acceptMessage( INTERNAL_CATCH_UNIQUE_NAME( strm ).str() ); \
-    Catch::ResultsCapture::acceptResult( resultType, stopOnFailure );
+    INTERNAL_CATCH_ACCEPT_RESULT( resultType, stopOnFailure ) \
 
 #define INTERNAL_CATCH_SCOPED_INFO( log ) Catch::ScopedInfo INTERNAL_CATCH_UNIQUE_NAME( info ); INTERNAL_CATCH_UNIQUE_NAME( info ) << log
 

internal/catch_commandline.hpp

@@ -25,6 +25,7 @@ namespace Catch
     // -r --report <type>
     // -o --output filename to write to
     // -s --success report successful cases too
+    // -b --break breaks into debugger on test failure
 	class ArgParser : NonCopyable
     {
         enum Mode
@@ -35,6 +36,7 @@ namespace Catch
             modeReport,
             modeOutput,
             modeSuccess,
+            modeBreak,
 
             modeError
         };
@@ -59,6 +61,8 @@ namespace Catch
                         changeMode( cmd, modeOutput );
                     else if( cmd == "-s" || cmd == "--success" )
                         changeMode( cmd, modeSuccess );
+                    else if( cmd == "-b" || cmd == "--break" )
+                        changeMode( cmd, modeBreak );
                 }
                 else
                 {
@@ -148,6 +152,11 @@ namespace Catch
                         return setErrorMode( m_command + " does not accept arguments" );
                     m_config.setIncludeAll( true );
                     break;
+                case modeBreak:
+                    if( m_args.size() != 0 )
+                        return setErrorMode( m_command + " does not accept arguments" );
+                    m_config.setShouldDebugBreak( true );
+                    break;
             }
             m_args.clear();
             m_mode = mode;

internal/catch_debugger.hpp

@@ -0,0 +1,87 @@
+/*
+ *  catch_debugger.hpp
+ *  Catch
+ *
+ *  Created by Phil on 27/12/2010.
+ *  Copyright 2010 Two Blue Cubes Ltd. All rights reserved.
+ *
+ *  Distributed under the Boost Software License, Version 1.0. (See accompanying
+ *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Provides a DebugBreak() macro for platforms other than Windows
+ * (currently only Macs are supported)
+ */
+
+#ifndef TWOBLUECUBES_CATCH_DEBUGGER_HPP_INCLUDED
+#define TWOBLUECUBES_CATCH_DEBUGGER_HPP_INCLUDED
+
+#if defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
+
+    #include <assert.h>
+    #include <stdbool.h>
+    #include <sys/types.h>
+    #include <unistd.h>
+    #include <sys/sysctl.h>
+
+    namespace Catch
+    {
+        // The following function is taken directly from the following technical note:
+        // http://developer.apple.com/library/mac/#qa/qa2004/qa1361.html
+            
+        inline bool AmIBeingDebugged(void)
+        // Returns true if the current process is being debugged (either
+        // running under the debugger or has a debugger attached post facto).
+        {
+            int                 junk;
+            int                 mib[4];
+            struct kinfo_proc   info;
+            size_t              size;
+            
+            // Initialize the flags so that, if sysctl fails for some bizarre
+            // reason, we get a predictable result.
+            
+            info.kp_proc.p_flag = 0;
+            
+            // Initialize mib, which tells sysctl the info we want, in this case
+            // we're looking for information about a specific process ID.
+            
+            mib[0] = CTL_KERN;
+            mib[1] = KERN_PROC;
+            mib[2] = KERN_PROC_PID;
+            mib[3] = getpid();
+            
+            // Call sysctl.
+            
+            size = sizeof(info);
+            junk = sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, NULL, 0);
+            assert(junk == 0);
+            
+            // We're being debugged if the P_TRACED flag is set.
+            
+            return ( (info.kp_proc.p_flag & P_TRACED) != 0 );
+        }        
+    }
+
+    // The following code snippet taken from:
+    // http://cocoawithlove.com/2008/03/break-into-debugger.html
+    #ifdef DEBUG
+        #if __ppc64__ || __ppc__
+            #define DebugBreak() \
+            if( Catch::AmIBeingDebugged() ) \
+            { \
+            __asm__("li r0, 20\nsc\nnop\nli r0, 37\nli r4, 2\nsc\nnop\n" \
+            : : : "memory","r0","r3","r4" ); \
+            }
+        #else
+            #define DebugBreak() if( Catch::AmIBeingDebugged() ) {__asm__("int $3\n" : : );}
+        #endif
+    #endif
+
+#endif
+
+#ifndef DebugBreak
+    #define DebugBreak()
+#endif
+
+
+#endif // TWOBLUECUBES_CATCH_DEBUGGER_HPP_INCLUDED

internal/catch_runner_impl.hpp

@@ -13,6 +13,7 @@
 #define TWOBLUECUBES_INTERNAL_CATCH_RUNNER_HPP_INCLUDED
 
 #include "catch_reporter_registry.hpp"
+#include "catch_runnerconfig.hpp"
 #include "catch_registry.hpp"
 #include "catch_capture.hpp"
 
@@ -72,10 +73,11 @@ namespace Catch
     class Runner : public IResultListener
     {
     public:
-        explicit Runner( ITestReporter* reporter )
+        explicit Runner( const RunnerConfig& config )
         :   m_successes( 0 ),
             m_failures( 0 ),
-            m_reporter( reporter )
+            m_config( config ),
+            m_reporter( m_config.getReporter() )
         {
             m_reporter->StartTesting();
         }
@@ -189,8 +191,13 @@ namespace Catch
             if( m_scopedInfos.back() == scopedInfo )
                 m_scopedInfos.pop_back();
         }
+        virtual bool shouldDebugBreak() const
+        {
+            return m_config.shouldDebugBreak();
+        }
         
     private:
+        const RunnerConfig& m_config;
         std::size_t m_successes;
         std::size_t m_failures;
         ITestReporter* m_reporter;

internal/catch_runnerconfig.hpp

@@ -44,7 +44,8 @@ namespace Catch
         
         RunnerConfig()
         :   m_listSpec( listNone ),
-            m_reporter( NULL )
+            m_reporter( NULL ),
+            m_shouldDebugBreak( false )
         {}
         
         void setReporterInfo( const std::string& reporterName )
@@ -90,7 +91,7 @@ namespace Catch
             return m_reporter.get();
         }
         
-        const ITestReporter* getReporter() const
+        ITestReporter* getReporter() const
         {
             return const_cast<RunnerConfig*>( this )->getReporter();
         }
@@ -113,6 +114,14 @@ namespace Catch
         {
             m_reporterConfig.setIncludeWhat( includeAll ? ReporterConfig::Include::SuccessfulResults : ReporterConfig::Include::FailedOnly );
         }
+        void setShouldDebugBreak( bool shouldDebugBreak )
+        {
+            m_shouldDebugBreak = shouldDebugBreak;
+        }
+        bool shouldDebugBreak() const
+        {
+            return m_shouldDebugBreak;
+        }
         
         std::auto_ptr<ITestReporter> m_reporter;
         std::string m_filename;
@@ -120,6 +129,7 @@ namespace Catch
         std::string m_message;
         ListInfo m_listSpec;
         std::vector<std::string> m_testSpecs;
+        bool m_shouldDebugBreak;
     };
     
 } // end namespace Catch