[lldb] Add test with custom alignment on a clang type

rdar://127785973

Author: augusto2112

lldb/test/API/lang/swift/clangimporter/custom_alignment/Makefile

@@ -0,0 +1,4 @@
+SWIFT_SOURCES := main.swift
+SWIFTFLAGS_EXTRAS = -I$(SRCDIR)
+
+include Makefile.rules

lldb/test/API/lang/swift/clangimporter/custom_alignment/TestSwiftClangImporterCustomAlignment.py

@@ -0,0 +1,48 @@
+# TestSwiftClangImporterCustomAlignment.py
+#
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See https://swift.org/LICENSE.txt for license information
+# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#
+# ------------------------------------------------------------------------------
+import lldb
+from lldbsuite.test.decorators import *
+import lldbsuite.test.lldbtest as lldbtest
+import lldbsuite.test.lldbutil as lldbutil
+import os
+import unittest2
+
+
+class TestSwiftClangImporterCustomAlignment(lldbtest.TestBase):
+
+    mydir = lldbtest.TestBase.compute_mydir(__file__)
+
+    @swiftTest
+    @skipIf(setting=('symbols.use-swift-clangimporter', 'false'))
+    def test(self):
+        self.build()
+        target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(
+            self, "break here", lldb.SBFileSpec("main.swift")
+        )
+        frame = thread.frames[0]
+        v = frame.FindVariable("v")
+        s = v.GetChildMemberWithName("s")
+
+        field_1 = s.GetChildMemberWithName("field_64_1")
+        lldbutil.check_variable(self, field_1, False, value="100")
+
+        field_2 = s.GetChildMemberWithName("field_32_1")
+        lldbutil.check_variable(self, field_2, False, value="200")
+
+        field_3 = s.GetChildMemberWithName("field_32_2")
+        lldbutil.check_variable(self, field_3, False, value="300")
+
+        field_4 = s.GetChildMemberWithName("field_64_2")
+        lldbutil.check_variable(self, field_4, False, value="400")
+
+        x = v.GetChildMemberWithName("x")
+        lldbutil.check_variable(self, x, False, value="1")

lldb/test/API/lang/swift/clangimporter/custom_alignment/header.h

@@ -0,0 +1,14 @@
+#include "stdlib.h"
+#include <stdint.h>
+
+#pragma pack(push, 4)
+
+struct Struct {
+ int64_t field_64_1;
+ int32_t field_32_1;
+ uint32_t field_32_2;
+ int64_t field_64_2;
+}; 
+
+#pragma pack(pop)
+

lldb/test/API/lang/swift/clangimporter/custom_alignment/main.swift

@@ -0,0 +1,17 @@
+import Module
+
+struct Value {
+  var x: Int32 = 1
+  var s = Struct()
+}
+
+func f() {
+  var v = Value()
+  v.s.field_64_1 = 100;
+  v.s.field_32_1 = 200;
+  v.s.field_32_2 = 300;
+  v.s.field_64_2 = 400;
+  print(v) // break here
+}
+
+f()

lldb/test/API/lang/swift/clangimporter/custom_alignment/module.modulemap

@@ -0,0 +1,4 @@
+module Module {
+  header "header.h"
+  export *
+}