Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/unittests/DebugInfo/MSF/MSFCommonTest.cpp

@@ -0,0 +1,104 @@
+//===- MSFBuilderTest.cpp  Tests manipulation of MSF stream metadata ------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/MSF/MSFCommon.h"
+#include "llvm/Testing/Support/Error.h"
+
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace llvm::msf;
+
+TEST(MSFCommonTest, BytesToBlocks) {
+  EXPECT_EQ(0ULL, bytesToBlocks(0, 4096));
+  EXPECT_EQ(1ULL, bytesToBlocks(12, 4096));
+  EXPECT_EQ(1ULL, bytesToBlocks(4096, 4096));
+  EXPECT_EQ(2ULL, bytesToBlocks(4097, 4096));
+  EXPECT_EQ(2ULL, bytesToBlocks(600, 512));
+}
+
+TEST(MSFCommonTest, FpmIntervals) {
+  SuperBlock SB;
+  SB.FreeBlockMapBlock = 1;
+  SB.BlockSize = 4096;
+
+  MSFLayout L;
+  L.SB = &SB;
+
+  SB.NumBlocks = 12;
+  EXPECT_EQ(1u, getNumFpmIntervals(L, false));
+  SB.NumBlocks = SB.BlockSize;
+  EXPECT_EQ(1u, getNumFpmIntervals(L, false));
+  SB.NumBlocks = SB.BlockSize + 1;
+  EXPECT_EQ(1u, getNumFpmIntervals(L, false));
+  SB.NumBlocks = SB.BlockSize * 8;
+  EXPECT_EQ(1u, getNumFpmIntervals(L, false));
+  SB.NumBlocks = SB.BlockSize * 8 + 1;
+  EXPECT_EQ(2u, getNumFpmIntervals(L, false));
+
+  SB.NumBlocks = 12;
+  EXPECT_EQ(1u, getNumFpmIntervals(L, true));
+  SB.NumBlocks = SB.BlockSize;
+  EXPECT_EQ(1u, getNumFpmIntervals(L, true));
+  SB.NumBlocks = SB.BlockSize + 1;
+  EXPECT_EQ(2u, getNumFpmIntervals(L, true));
+  SB.NumBlocks = SB.BlockSize * 8;
+  EXPECT_EQ(8u, getNumFpmIntervals(L, true));
+  SB.NumBlocks = SB.BlockSize * 8 + 1;
+  EXPECT_EQ(9u, getNumFpmIntervals(L, true));
+}
+
+TEST(MSFCommonTest, FpmStreamLayout) {
+  SuperBlock SB;
+  MSFLayout L;
+  L.SB = &SB;
+  SB.FreeBlockMapBlock = 1;
+
+  // Each FPM block has 4096 bytes for a maximum of 4096*8 allocation states.
+  SB.BlockSize = 4096;
+
+  // 1. When we're not including unused FPM data, the length of the FPM stream
+  //    should be only long enough to contain 1 bit for each block.
+
+  // 1a. When the PDB has <= 4096*8 blocks, there should only be one FPM block.
+  SB.NumBlocks = 8000;
+  MSFStreamLayout SL = getFpmStreamLayout(L, false, false);
+  EXPECT_EQ(1000u, SL.Length);
+  EXPECT_EQ(1u, SL.Blocks.size());
+  EXPECT_EQ(SB.FreeBlockMapBlock, SL.Blocks.front());
+
+  SL = getFpmStreamLayout(L, false, true);
+  EXPECT_EQ(1000u, SL.Length);
+  EXPECT_EQ(1u, SL.Blocks.size());
+  EXPECT_EQ(3u - SB.FreeBlockMapBlock, SL.Blocks.front());
+
+  // 1b. When the PDB has > 4096*8 blocks, there should be multiple FPM blocks.
+  SB.NumBlocks = SB.BlockSize * 8 + 1;
+  SL = getFpmStreamLayout(L, false, false);
+  EXPECT_EQ(SB.BlockSize + 1, SL.Length);
+  EXPECT_EQ(2u, SL.Blocks.size());
+  EXPECT_EQ(SB.FreeBlockMapBlock, SL.Blocks[0]);
+  EXPECT_EQ(SB.FreeBlockMapBlock + SB.BlockSize, SL.Blocks[1]);
+
+  SL = getFpmStreamLayout(L, false, true);
+  EXPECT_EQ(SB.BlockSize + 1, SL.Length);
+  EXPECT_EQ(2u, SL.Blocks.size());
+  EXPECT_EQ(3u - SB.FreeBlockMapBlock, SL.Blocks[0]);
+  EXPECT_EQ(3u - SB.FreeBlockMapBlock + SB.BlockSize, SL.Blocks[1]);
+
+  // 2. When we are including unused FPM data, there should be one FPM block
+  //    at every BlockSize interval in the file, even if entire FPM blocks are
+  //    unused.
+  SB.NumBlocks = SB.BlockSize * 8 + 1;
+  SL = getFpmStreamLayout(L, true, false);
+  EXPECT_EQ(SB.BlockSize * 9, SL.Length);
+  EXPECT_EQ(9u, SL.Blocks.size());
+  for (int I = 0; I < 9; ++I)
+    EXPECT_EQ(I * SB.BlockSize + SB.FreeBlockMapBlock, SL.Blocks[I]);
+}