Added a crashing test app. Food for the debug server and gdb. :-)

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13709 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/servers/Jamfile

@@ -1,5 +1,6 @@
 SubDir OBOS_TOP src tests servers ;
 
 SubInclude OBOS_TOP src tests servers app ;
+SubInclude OBOS_TOP src tests servers debug ;
 SubInclude OBOS_TOP src tests servers input ;
 SubInclude OBOS_TOP src tests servers registrar ;

src/tests/servers/debug/Jamfile

@@ -0,0 +1,3 @@
+SubDir OBOS_TOP src tests servers debug ;
+
+SimpleTest crashing_app : crashing_app.cpp : libroot.so ;

src/tests/servers/debug/crashing_app.cpp

@@ -0,0 +1,132 @@
+
+#include <stdio.h>
+
+#include <OS.h>
+
+extern const char *__progname;
+
+// usage
+static const char *kUsage =
+	"%s <options> [ <mode> ]\n"
+	"Crashes in more or less inovative ways.\n"
+	"\n"
+	"Options:\n"
+	"  -h, --help           - print this info text\n"
+	"\n"
+	"Modes:\n"
+	"[general]\n"
+	"  segv                 - dereferences a null pointer (default)\n"
+	"  segv2                - strcmp() using a 0x1 pointer\n"
+	"  div                  - executes a division by zero\n"
+	"  debugger             - invokes debugger()\n"
+	"\n"
+	"[x86 specific]\n"
+	"  int3                 - executes the int3 (breakpoint) instruction\n"
+	"  protection           - executes an instruction that causes a general\n"
+	"                         protection exception\n";
+
+// application name
+const char *kAppName = __progname;
+
+static void
+print_usage(bool error)
+{
+	fprintf(error ? stderr : stdout, kUsage, kAppName);
+}
+
+
+static void
+print_usage_and_exit(bool error)
+{
+	print_usage(error);
+	exit(error ? 0 : 1);
+}
+
+
+static void
+crash_segv()
+{
+	int *a = 0;
+	*a = 0;
+}
+
+static void
+crash_segv2()
+{
+	const char *str = (const char*)0x1;
+	strcmp(str, "Test");
+}
+
+static void
+crash_div()
+{
+	int i = 0;
+	i = 1 / i;
+}
+
+static void
+crash_debugger()
+{
+	debugger("crashing_app() invoked debugger()");
+}
+
+#if __INTEL__
+
+static void
+crash_int3()
+{
+	asm("int3");
+}
+
+static void
+crash_protection()
+{
+	asm("movl %0, %%dr7" : : "r"(0));
+}
+
+#endif	// __INTEL__
+
+
+int
+main(int argc, const char *const *argv)
+{
+	const char *mode = "segv";
+
+	// parse args
+	int argi = 1;
+	while (argi < argc) {
+		const char *arg = argv[argi++];
+
+		if (arg[0] == '-') {
+			if (strcmp(arg, "-h") == 0 || strcmp(arg, "--help") == 0) {
+				print_usage_and_exit(false);
+			} else {
+				fprintf(stderr, "Invalid option \"%s\"\n", arg);
+				print_usage_and_exit(true);
+			}
+		} else {
+			mode = arg;
+		}
+	}
+
+	if (strcmp(mode, "segv") == 0) {
+		crash_segv();
+	} else if (strcmp(mode, "segv2") == 0) {
+		crash_segv2();
+	} else if (strcmp(mode, "div") == 0) {
+		crash_div();
+	} else if (strcmp(mode, "debugger") == 0) {
+		crash_debugger();
+#if __INTEL__
+	} else if (strcmp(mode, "int3") == 0) {
+		crash_int3();
+	} else if (strcmp(mode, "protection") == 0) {
+		crash_protection();
+#endif	// __INTEL__
+	} else {
+		fprintf(stderr, "Invalid mode \"%s\"\n", mode);
+		print_usage_and_exit(true);
+	}
+
+	return 0;
+}