Added signal handlers (and placeholder for SEH handlers)

- based on PR 232 (https://github.com/philsquared/Catch/pull/232 - thanks Lukasz Forynski)
- Writes to reporter, so gets all the usual context, but then exits directly (since the stack cannot be resumed) so no summary
- On Windows does nothing, as yet.

include/internal/catch_fatal_condition.hpp

@@ -0,0 +1,78 @@
+/*
+ *  Created by Phil on 21/08/2014
+ *  Copyright 2014 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)
+ *
+ */
+#ifndef TWOBLUECUBES_CATCH_FATAL_CONDITION_H_INCLUDED
+#define TWOBLUECUBES_CATCH_FATAL_CONDITION_H_INCLUDED
+
+
+namespace Catch {
+
+    // Report the error condition then exit the process
+    inline void fatal( std::string const& message, int exitCode ) {
+        IContext& context = Catch::getCurrentContext();
+        IResultCapture* resultCapture = context.getResultCapture();
+        ResultBuilder resultBuilder = resultCapture->makeUnexpectedResultBuilder();
+        resultBuilder.setResultType( ResultWas::FatalErrorCondition );
+        resultBuilder << message;
+        resultBuilder.captureExpression();
+        
+		if( Catch::alwaysTrue() ) // avoids "no return" warnings
+            exit( exitCode );
+    }
+
+} // namespace Catch
+
+#if defined ( CATCH_PLATFORM_WINDOWS ) /////////////////////////////////////////
+
+namespace Catch {
+
+    struct FatalConditionHandler {};
+
+} // namespace Catch
+
+#else // Not Windows - assumed to be POSIX compatible //////////////////////////
+
+#include <signal.h>
+
+namespace Catch {
+
+    struct SignalDefs { int id; const char* name; };
+    extern SignalDefs signalDefs[];
+    SignalDefs signalDefs[] = {
+            { SIGINT,  "SIGINT - Terminal interrupt signal" },
+            { SIGILL,  "SIGILL - Illegal instruction signal" },
+            { SIGFPE,  "SIGFPE - Floating point error signal" },
+            { SIGSEGV, "SIGSEGV - Segmentation violation signal" },
+            { SIGTERM, "SIGTERM - Termination request signal" },
+            { SIGABRT, "SIGABRT - Abort (abnormal termination) signal" }
+        };
+
+    struct FatalConditionHandler {
+
+        static void handleSignal( int sig ) {
+            for( std::size_t i = 0; i < sizeof(signalDefs)/sizeof(SignalDefs); ++i )
+                if( sig == signalDefs[i].id )
+                    fatal( signalDefs[i].name, -sig );
+            fatal( "<unknown signal>", -sig );
+        }
+
+        FatalConditionHandler() {
+            for( std::size_t i = 0; i < sizeof(signalDefs)/sizeof(SignalDefs); ++i )
+                signal( signalDefs[i].id, handleSignal );
+        }
+        ~FatalConditionHandler() {
+            for( std::size_t i = 0; i < sizeof(signalDefs)/sizeof(SignalDefs); ++i )
+                signal( signalDefs[i].id, SIG_DFL );
+        }
+    };
+
+} // namespace Catch
+
+#endif // not Windows
+
+#endif // TWOBLUECUBES_CATCH_FATAL_CONDITION_H_INCLUDED

include/internal/catch_interfaces_capture.h

@@ -21,6 +21,7 @@ namespace Catch {
     struct MessageInfo;
     class ScopedMessageBuilder;
     struct Counts;
+    class ResultBuilder;
 
     struct IResultCapture {
 
@@ -35,6 +36,8 @@ namespace Catch {
 
         virtual std::string getCurrentTestName() const = 0;
         virtual const AssertionResult* getLastResult() const = 0;
+
+        virtual ResultBuilder makeUnexpectedResultBuilder() const = 0;
     };
 
     IResultCapture& getResultCapture();

include/internal/catch_result_type.h

@@ -25,7 +25,9 @@ namespace Catch {
         Exception = 0x100 | FailureBit,
 
         ThrewException = Exception | 1,
-        DidntThrowException = Exception | 2
+        DidntThrowException = Exception | 2,
+
+        FatalErrorCondition = 0x200 | FailureBit
 
     }; };
 

include/internal/catch_runner_impl.hpp

@@ -20,6 +20,7 @@
 #include "catch_test_case_tracker.hpp"
 #include "catch_timer.h"
 #include "catch_result_builder.h"
+#include "catch_fatal_condition.hpp"
 
 #include <set>
 #include <string>
@@ -215,6 +216,13 @@ namespace Catch {
             return m_totals.assertions.failed == static_cast<std::size_t>( m_config->abortAfter() );
         }
 
+        virtual ResultBuilder makeUnexpectedResultBuilder() const {
+            return ResultBuilder(   m_lastAssertionInfo.macroName.c_str(),
+                                    m_lastAssertionInfo.lineInfo,
+                                    m_lastAssertionInfo.capturedExpression.c_str(),
+                                    m_lastAssertionInfo.resultDisposition );
+        }
+
     private:
 
         void runCurrentTest( std::string& redirectedCout, std::string& redirectedCerr ) {
@@ -232,10 +240,10 @@ namespace Catch {
                 if( m_reporter->getPreferences().shouldRedirectStdOut ) {
                     StreamRedirect coutRedir( std::cout, redirectedCout );
                     StreamRedirect cerrRedir( std::cerr, redirectedCerr );
-                    m_activeTestCase->invoke();
+                    invokeActiveTestCase();
                 }
                 else {
-                    m_activeTestCase->invoke();
+                    invokeActiveTestCase();
                 }
                 duration = timer.getElapsedSeconds();
             }
@@ -243,11 +251,7 @@ namespace Catch {
                 // This just means the test was aborted due to failure
             }
             catch(...) {
-                ResultBuilder exResult( m_lastAssertionInfo.macroName.c_str(),
-                                        m_lastAssertionInfo.lineInfo,
-                                        m_lastAssertionInfo.capturedExpression.c_str(),
-                                        m_lastAssertionInfo.resultDisposition );
-                exResult.useActiveException();
+                makeUnexpectedResultBuilder().useActiveException();
             }
             // If sections ended prematurely due to an exception we stored their
             // infos here so we can tear them down outside the unwind process.
@@ -272,6 +276,11 @@ namespace Catch {
             m_reporter->sectionEnded( testCaseSectionStats );
         }
 
+        void invokeActiveTestCase() {
+            FatalConditionHandler fatalConditionHandler; // Handle signals
+            m_activeTestCase->invoke();
+        }
+
     private:
         struct UnfinishedSections {
             UnfinishedSections( SectionInfo const& _info, Counts const& _prevAssertions, double _durationInSeconds )