SIGSEGV handling for Windows

ChangeLog

@@ -1,3 +1,10 @@
+2009-05-02 Holger Vogt
+ * configure.in: new flag NGDEBUG
+   main.c, signal_handler.c, visualc/vngspice.vcproj:
+   restore SIGSEGV signal handling for error message after seg fault
+   (not in debug mode, now only for Windows)
+   dctrcurv: winmessage about dc
+   
 2009-05-01 Holger Vogt
  * cktdojob.c, cktsopt.c: moved to cktsopt.c:
    maxord set to min 2 or max 6

configure.in

@@ -211,6 +211,7 @@ if test "$enable_debug" = "no"; then
 		CFLAGS="$ext_CFLAGS -O2"
 	fi
 else
+    AC_DEFINE(NGDEBUG,1,[Compile with debug info])
 	if test "x$GCC" = "xyes"; then
 		CFLAGS="$ext_CFLAGS -g -O0 -Wall"
 	else

src/frontend/signal_handler.c

@@ -17,6 +17,10 @@ Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
 #include <signal.h>
 #include "signal_handler.h"
 
+#ifdef HAS_WINDOWS
+void winmessage(char* new_msg);
+#endif
+
 #ifdef HAVE_GNUREADLINE
 /* Added GNU Readline Support 11/3/97 -- Andrew Veliath <veliaa@rpi.edu> */
 /* from spice3f4 patch to ng-spice. jmr */
@@ -133,6 +137,9 @@ RETSIGTYPE
 sigsegv(void)
 {
     fprintf(cp_err, "\ninternal error -- segmentation violation\n");
+#ifdef HAS_WINDOWS
+    winmessage("Fatal error in NGSPICE");
+#endif    
     fatal();
 }
 

src/main.c

@@ -939,10 +939,9 @@ main(int argc, char **argv)
 #ifdef SIGBUS
     signal(SIGBUS, (SIGNAL_FUNCTION) sigbus);
 #endif
-#ifdef SIGSEGV
-/* Want core files!
- *   signal(SIGSEGV, sigsegv);
- */
+#if defined(SIGSEGV) && !defined(NGDEBUG) && defined(HAS_WINDOWS)
+/* Allow a comment and graceful shutdown after seg fault */
+    signal(SIGSEGV, sigsegv);
 #endif
 #ifdef SIGSYS
     signal(SIGSYS, (SIGNAL_FUNCTION) sig_sys);

src/spicelib/analysis/dctrcurv.c

@@ -25,6 +25,11 @@ Modified: 1999 Paolo Nenzi
 #include <devdefs.h>
 extern SPICEdev **DEVices;
 
+#ifdef HAS_WINDOWS
+void SetAnalyse( char * Analyse, int Percent);
+static double actval, actdiff; 
+#endif
+
 int
 DCtrCurv(CKTcircuit *ckt, int restart) 
                 
@@ -160,6 +165,11 @@ DCtrCurv(CKTcircuit *ckt, int restart)
 found:;
     }
 
+#ifdef HAS_WINDOWS
+    actval = cv->TRCVvStart[cv->TRCVnestLevel];
+    actdiff = cv->TRCVvStart[cv->TRCVnestLevel] - cv->TRCVvStop[cv->TRCVnestLevel];
+#endif
+
 #ifdef XSPICE
 /* gtri - add - wbk - 12/19/90 - Add IPC stuff and anal_init and anal_type */
 
@@ -474,6 +484,7 @@ resume:
         }
 
 nextstep:;
+
         if(cv->TRCVvType[i]==vcode) { /* voltage source */
             ((VSRCinstance*)(cv->TRCVvElt[i]))->VSRCdcValue +=
                     cv->TRCVvStep[i];
@@ -503,6 +514,12 @@ nextstep:;
             cv->TRCVnestState = i;
             return(E_PAUSE);
         }
+#ifdef HAS_WINDOWS
+        if (i == cv->TRCVnestLevel) {
+            actval += cv->TRCVvStep[cv->TRCVnestLevel];
+            SetAnalyse( "dc", (int)abs(((actval * 100.) / actdiff)));
+        } 
+#endif
     }
 
     /* all done, lets put everything back */

visualc/vngspice.vcproj

@@ -40,7 +40,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories=""$(ProjectDir)..\src\maths\poly";"$(ProjectDir)..\src\frontend";"$(ProjectDir)..\src\spicelib\devices";"$(ProjectDir)..\src\include";"$(ProjectDir)include""
-				PreprocessorDefinitions="_CRT_SECURE_NO_DEPRECATE;SIMULATOR;OUTDECK"
+				PreprocessorDefinitions="_CRT_SECURE_NO_DEPRECATE;SIMULATOR;OUTDECK;NGDEBUG"
 				MinimalRebuild="true"
 				ExceptionHandling="0"
 				BasicRuntimeChecks="0"
@@ -1100,11 +1100,11 @@
 				>
 			</File>
 			<File
-				RelativePath="..\src\frontend\plotting\grid.h"
+				RelativePath="..\src\include\grid.h"
 				>
 			</File>
 			<File
-				RelativePath="..\src\include\grid.h"
+				RelativePath="..\src\frontend\plotting\grid.h"
 				>
 			</File>
 			<File