catch SIGSEGV and other signals on Linux to print stacktrace when crashing, don't strip bins on compilation

git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@3075 e016b1c5-ed68-44aa-a2f7-31cac88cffde

source/src/Makefile

@@ -1,6 +1,6 @@
 CXXOPTFLAGS=-O3 -fomit-frame-pointer
 INCLUDES=-I/usr/X11R6/include -I../enet/include -I../src `sdl-config --cflags`
-CXXFLAGS=$(CXXOPTFLAGS) $(INCLUDES) -fsigned-char -Wall -Wno-deprecated
+CXXFLAGS=$(CXXOPTFLAGS) $(INCLUDES) -fsigned-char -Wall -Wno-deprecated -rdynamic
 
 PLATFORM_PREFIX=native
 CLIENT_LIBS=-L/usr/X11R6/lib -L../enet -lenet `sdl-config --libs` -lSDL_image -lz -lGL -lGLU -lopenal -lvorbisfile
@@ -80,5 +80,5 @@ server: $(SERVER_FILES)
 install: all
 	cp ac_client ../../bin_unix/$(PLATFORM_PREFIX)_client
 	cp ac_server ../../bin_unix/$(PLATFORM_PREFIX)_server
-	strip ../../bin_unix/$(PLATFORM_PREFIX)_client
-	strip ../../bin_unix/$(PLATFORM_PREFIX)_server
+#	strip ../../bin_unix/$(PLATFORM_PREFIX)_client
+#	strip ../../bin_unix/$(PLATFORM_PREFIX)_server

source/src/pch.h

@@ -17,6 +17,8 @@
 #include <limits.h>
 #ifdef __GNUC__
 #include <new>
+#include <execinfo.h>
+#include <signal.h>
 #else
 #include <new.h>
 #endif

source/src/tools.cpp

@@ -329,8 +329,48 @@ void stackdumper(unsigned int type, EXCEPTION_POINTERS *ep)
     }
     fatal(out);
 }
+#elif !defined(WIN32) && defined(__GNUC__)
+
+// stack dumping on linux, inspired by Sachin Agrawal's sample code
+
+struct signalbinder
+{
+    static void stackdumper(int sig)
+    {
+        printf("stacktrace:\n");
+
+        const int BTSIZE = 25;
+        void *array[BTSIZE];
+        int n = backtrace(array, BTSIZE);
+        char **symbols = backtrace_symbols(array, n);
+        for(int i = 0; i < n; i++)
+        {
+            printf("%s\n", symbols[i]);
+        }
+        free(symbols);
+
+        fatal("AssaultCube error (%d)", sig);
+
+    }
+
+    signalbinder()
+    {
+        // register signals to dump the stack if they are raised,
+        // use constructor for early registering
+        signal(SIGSEGV, stackdumper);
+        signal(SIGFPE, stackdumper);
+        signal(SIGILL, stackdumper);
+        signal(SIGBUS, stackdumper);
+        signal(SIGSYS, stackdumper);
+        signal(SIGABRT, stackdumper);
+    }
+};
+
+signalbinder sigbinder;
+
 #endif
 
+
 ///////////////////////// misc tools ///////////////////////
 
 bool cmpb(void *b, int n, enet_uint32 c)