--- /dev/null
+//===- unittest/DebugInfo/CodeView/GUIDFormatTest.cpp - GUID formatting ---===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/DebugInfo/CodeView/Formatters.h"
+#include "llvm/DebugInfo/CodeView/GUID.h"
+#include "llvm/Support/FormatVariadic.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+// Variant 1 UUIDs, nowadays the most common variant, are encoded in a
+// big-endian format.
+// For example, 00112233-4455-6677-8899-aabbccddeeff is encoded as the bytes
+// 00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff
+//
+// Variant 2 UUIDs, historically used in Microsoft's COM/OLE libraries, use a
+// mixed-endian format, whereby the first three components of the UUID are
+// little-endian, and the last two are big-endian.
+// For example, 00112233-4455-6677-8899-aabbccddeeff is encoded as the bytes
+// 33 22 11 00 55 44 77 66 88 99 aa bb cc dd ee ff.
+//
+// Note: Only Variant 2 UUIDs are tested.
+namespace {
+
+using GuidPair = std::pair<StringRef, GUID>;
+using GuidData = SmallVector<GuidPair>;
+
+void checkData(GuidData &Data) {
+ for (auto Item : Data) {
+ std::string GuidText(formatv("{0}", Item.second).str());
+ StringRef Scalar(GuidText);
+
+ // GUID strings are 38 characters long.
+ EXPECT_EQ(Scalar.size(), size_t(38));
+
+ // GUID must be enclosed in {}
+ EXPECT_EQ(Scalar.front(), '{');
+ EXPECT_EQ(Scalar.back(), '}');
+
+ Scalar = Scalar.substr(1, Scalar.size() - 2);
+ SmallVector<StringRef, 6> Component;
+ Scalar.split(Component, '-', 5);
+
+ // GUID must have 5 components.
+ EXPECT_EQ(Component.size(), size_t(5));
+
+ // GUID components are properly delineated with dashes.
+ EXPECT_EQ(Scalar[8], '-');
+ EXPECT_EQ(Scalar[13], '-');
+ EXPECT_EQ(Scalar[18], '-');
+ EXPECT_EQ(Scalar[23], '-');
+
+ // GUID only contains hex digits.
+ struct {
+ support::ulittle32_t Data0;
+ support::ulittle16_t Data1;
+ support::ulittle16_t Data2;
+ support::ubig16_t Data3;
+ support::ubig64_t Data4;
+ } G = {};
+ EXPECT_TRUE(to_integer(Component[0], G.Data0, 16));
+ EXPECT_TRUE(to_integer(Component[1], G.Data1, 16));
+ EXPECT_TRUE(to_integer(Component[2], G.Data2, 16));
+ EXPECT_TRUE(to_integer(Component[3], G.Data3, 16));
+ EXPECT_TRUE(to_integer(Component[4], G.Data4, 16));
+
+ // Check the values are the same.
+ EXPECT_EQ(Scalar, Item.first);
+ }
+}
+
+TEST(GUIDFormatTest, ValidateFormat) {
+ // Shifting 2 (0x00)
+ GuidData Data = {
+ // Non-zero values in all components.
+ {"11223344-5566-7788-99AA-BBCCDDEEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+
+ // Zero values in all components.
+ {"00000000-0000-0000-0000-000000000000",
+ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00}},
+
+ // Shift 2 (0x00) across all components
+ {"00003344-5566-7788-99AA-BBCCDDEEFFAA",
+ {0x44, 0x33, 0x00, 0x00, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11000044-5566-7788-99AA-BBCCDDEEFFAA",
+ {0x44, 0x00, 0x00, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11220000-5566-7788-99AA-BBCCDDEEFFAA",
+ {0x00, 0x00, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223300-0066-7788-99AA-BBCCDDEEFFAA",
+ {0x00, 0x33, 0x22, 0x11, 0x66, 0x00, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223344-0000-7788-99AA-BBCCDDEEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x00, 0x00, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223344-5500-0088-99AA-BBCCDDEEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x00, 0x55, 0x88, 0x00, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223344-5566-0000-99AA-BBCCDDEEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x00, 0x00, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223344-5566-7700-00AA-BBCCDDEEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x00, 0x77, 0x00, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223344-5566-7788-0000-BBCCDDEEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x00, 0x00, 0xbb, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223344-5566-7788-9900-00CCDDEEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0x00, 0x00, 0xcc,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223344-5566-7788-99AA-0000DDEEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0x00, 0x00,
+ 0xdd, 0xee, 0xff, 0xaa}},
+ {"11223344-5566-7788-99AA-BB0000EEFFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0x00,
+ 0x00, 0xee, 0xff, 0xaa}},
+ {"11223344-5566-7788-99AA-BBCC0000FFAA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0x00, 0x00, 0xff, 0xaa}},
+ {"11223344-5566-7788-99AA-BBCCDD0000AA",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0x00, 0x00, 0xaa}},
+ {"11223344-5566-7788-99AA-BBCCDDEE0000",
+ {0x44, 0x33, 0x22, 0x11, 0x66, 0x55, 0x88, 0x77, 0x99, 0xaa, 0xbb, 0xcc,
+ 0xdd, 0xee, 0x00, 0x00}},
+ };
+
+ checkData(Data);
+}
+} // namespace