basic debugger stepping test run to completion

src/torture/dbg_tests/basic_stepping_test.c

@@ -0,0 +1,47 @@
+/// test: {
+///   windows: {
+///     compile: "/Od /Z7 /c main.c /Fo:main.obj"
+///     compile: "/Od /Z7 /c foo.c /Fo:foo.obj"
+///     link: "/debug:full /dll foo.obj /out:foo.dll /implib:foo.lib"
+///     link: "/debug:full main.obj foo.lib /out:main.exe"
+///     launch: "main.exe"
+///   }
+///   linux: {
+///     compile: "-O0 -g main.c foo.c -o main"
+///     launch: "./main"
+///   }
+/// }
+
+/// file: "foo.c"
+
+#if defined(_WIN32)
+__declspec(dllexport)
+#endif
+int foo(int a)
+{               /// 6: at
+                /// 7: step_over
+  return a + 1; /// 8: at
+                /// 9: step_out
+}
+
+/// file: "main.c"
+
+#include <stdio.h>
+
+#if defined(_WIN32)
+__declspec(dllimport)
+#endif
+int foo();
+
+int main()                     /// 1: step_into
+{                              /// 2: at
+                               /// 3: step_over
+	int x = foo(123);            /// 4: at
+                               /// 5: step_into
+                               /// 10: at: -2
+                               /// 11: step_over
+	printf("Hello, world!\n");   /// 12: at
+                               /// 13: step_over
+                               /// 14: run
+}
+