Prevent extraction of objects from subprojects.

interpreter.py

@@ -1650,7 +1650,7 @@ class Interpreter():
         elif targetholder is JarHolder:
             targetclass = build.Jar
         else:
-            print(targetholder)
+            mlog.debug('Unknown target type:', str(targetholder))
             raise RuntimeError('Unreachable code')
         target = targetclass(name, self.subdir, is_cross, sources, objs, self.environment, kwargs)
         l = targetholder(target)
@@ -1770,8 +1770,19 @@ class Interpreter():
         if not isinstance(obj, InterpreterObject):
             raise InvalidArguments('Variable "%s" is not callable.' % object_name)
         (args, kwargs) = self.reduce_arguments(args)
+        if method_name == 'extract_objects':
+            self.validate_extraction(obj.held_object)
         return obj.method_call(method_name, args, kwargs)
 
+    def validate_extraction(self, buildtarget):
+        if self.subproject_dir == '':
+            if buildtarget.subdir.startswith(self.subproject_dir):
+                raise InterpreterException('Tried to extract objects from a subproject target.')
+        else:
+            lead = '/'.join(self.subdir.split('/')[0:2])
+            if not buildtarget.subdir.startswith(lead):
+                raise InterpreterException('Tried to extract objects from a different subproject target.')
+
     def array_method_call(self, obj, method_name, args):
         if method_name == 'contains':
             return self.check_contains(obj, args)

test cases/failing/16 extract object subdir/meson.build

@@ -0,0 +1,4 @@
+project('Extract objects from subdirs.', 'c')
+
+subdir('src')
+subdir('tst')

test cases/failing/16 extract object subdir/src/first/lib_first.c

@@ -0,0 +1,3 @@
+int first() {
+	return 1001;
+}

test cases/failing/16 extract object subdir/src/first/meson.build

@@ -0,0 +1 @@
+first_lib = shared_library('first_lib', 'lib_first.c')

test cases/failing/16 extract object subdir/src/meson.build

@@ -0,0 +1 @@
+subdir('first')

test cases/failing/16 extract object subdir/tst/first/exe_first.c

@@ -0,0 +1,5 @@
+int first(void);
+
+int main() {
+	return first() - 1001;
+}

test cases/failing/16 extract object subdir/tst/first/meson.build

@@ -0,0 +1,4 @@
+first_exe = executable('first_exe', 'exe_first.c',
+  objects : first_lib.extract_objects('lib_first.c'))
+
+test('first_test', first_exe)

test cases/failing/16 extract object subdir/tst/meson.build

@@ -0,0 +1 @@
+subdir('first')