[test] renaming test/1_stdlib to just test/stdlib

test/stdlib/SegmentAlignment.c

@@ -0,0 +1,49 @@
+// RUN: rm -rf %t  &&  mkdir -p %t
+// RUN: xcrun -sdk %target-sdk-name %clang -c -arch %target-cpu %s -o %t/SegmentAlignment.o
+// RUN: %target-build-swift %S/Inputs/SegmentAlignment.swift -Xlinker %t/SegmentAlignment.o -o %t/a.out
+// RUN: %target-run %t/a.out | %FileCheck %s
+// REQUIRES: executable_test
+// REQUIRES: CPU=armv7
+
+// Verify 16K segment alignment on 32-bit iOS device.
+// The linker sets this automatically on iOS 8+, 
+// but we deploy to iOS 7.
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <assert.h>
+#include <mach-o/dyld.h>
+#include <mach-o/getsect.h>
+
+#if __LP64__
+#define HeaderType struct mach_header_64
+#else
+#define HeaderType struct mach_header
+#endif
+
+// SegmentAlignment.swift import SpriteKit and calls Test().
+void Test(void)
+{
+    for (int i = 0; i < _dyld_image_count(); i++) {
+        const char *name = _dyld_get_image_name(i);
+        if (strstr(name, "libswift") == 0) continue;
+
+        unsigned long size;
+        const struct mach_header *mhdr = _dyld_get_image_header(i);
+        uint8_t *textAddress = 
+            getsegmentdata((HeaderType *)mhdr, "__TEXT", &size);
+        uint8_t *dataAddress = 
+            getsegmentdata((HeaderType *)mhdr, "__DATA", &size);
+
+        printf("%s %p %p\n", name, textAddress, dataAddress);
+        assert((uintptr_t)textAddress % 0x4000 == 0);
+        assert((uintptr_t)dataAddress % 0x4000 == 0);
+    }
+
+    printf("Flawless victory\n");
+    // CHECK-DAG: libswiftSpriteKit.dylib
+    // CHECK-DAG: libswiftUIKit.dylib
+    // CHECK-DAG: libswiftCore.dylib
+    // CHECK: Flawless victory
+}