compiler/optimizing/stack_map_test.cc

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "stack_map.h"

#include "art_method.h"
#include "base/arena_bit_vector.h"
#include "base/malloc_arena_pool.h"
#include "stack_map_stream.h"

#include "gtest/gtest.h"

namespace art {

// Check that the stack mask of given stack map is identical
// to the given bit vector. Returns true if they are same.
static bool CheckStackMask(
    const CodeInfo& code_info,
    const StackMap& stack_map,
    const BitVector& bit_vector) {
  BitMemoryRegion stack_mask = code_info.GetStackMaskOf(stack_map);
  if (bit_vector.GetNumberOfBits() > stack_mask.size_in_bits()) {
    return false;
  }
  for (size_t i = 0; i < stack_mask.size_in_bits(); ++i) {
    if (stack_mask.LoadBit(i) != bit_vector.IsBitSet(i)) {
      return false;
    }
  }
  return true;
}

using Kind = DexRegisterLocation::Kind;

constexpr static uint32_t kPcAlign = GetInstructionSetInstructionAlignment(kRuntimeISA);

TEST(StackMapTest, Test1) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);

  ArenaBitVector sp_mask(&allocator, 0, false);
  size_t number_of_dex_registers = 2;
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kInStack, 0);         // Short location.
  stream.AddDexRegisterEntry(Kind::kConstant, -2);       // Short location.
  stream.EndStackMapEntry();

  size_t size = stream.PrepareForFillIn();
  void* memory = allocator.Alloc(size, kArenaAllocMisc);
  MemoryRegion region(memory, size);
  stream.FillInCodeInfo(region);

  CodeInfo code_info(region);
  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps());

  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
  ASSERT_EQ(2u, number_of_catalog_entries);

  StackMap stack_map = code_info.GetStackMapAt(0);
  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64 * kPcAlign)));
  ASSERT_EQ(0u, stack_map.GetDexPc());
  ASSERT_EQ(64u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));

  ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask));

  ASSERT_TRUE(stack_map.HasDexRegisterMap());
  DexRegisterMap dex_register_map =
      code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
  ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
  ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
  ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters());

  ASSERT_EQ(Kind::kInStack, dex_register_map.GetLocationKind(0));
  ASSERT_EQ(Kind::kConstant, dex_register_map.GetLocationKind(1));
  ASSERT_EQ(0, dex_register_map.GetStackOffsetInBytes(0));
  ASSERT_EQ(-2, dex_register_map.GetConstant(1));

  DexRegisterLocation location0 = code_info.GetDexRegisterCatalogEntry(0);
  DexRegisterLocation location1 = code_info.GetDexRegisterCatalogEntry(1);
  ASSERT_EQ(Kind::kInStack, location0.GetKind());
  ASSERT_EQ(Kind::kConstant, location1.GetKind());
  ASSERT_EQ(0, location0.GetValue());
  ASSERT_EQ(-2, location1.GetValue());

  ASSERT_FALSE(stack_map.HasInlineInfo());
}

TEST(StackMapTest, Test2) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);
  ArtMethod art_method;

  ArenaBitVector sp_mask1(&allocator, 0, true);
  sp_mask1.SetBit(2);
  sp_mask1.SetBit(4);
  size_t number_of_dex_registers = 2;
  size_t number_of_dex_registers_in_inline_info = 0;
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask1, number_of_dex_registers, 2);
  stream.AddDexRegisterEntry(Kind::kInStack, 0);         // Short location.
  stream.AddDexRegisterEntry(Kind::kConstant, -2);       // Large location.
  stream.BeginInlineInfoEntry(&art_method, 3, number_of_dex_registers_in_inline_info);
  stream.EndInlineInfoEntry();
  stream.BeginInlineInfoEntry(&art_method, 2, number_of_dex_registers_in_inline_info);
  stream.EndInlineInfoEntry();
  stream.EndStackMapEntry();

  ArenaBitVector sp_mask2(&allocator, 0, true);
  sp_mask2.SetBit(3);
  sp_mask2.SetBit(8);
  stream.BeginStackMapEntry(1, 128 * kPcAlign, 0xFF, &sp_mask2, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kInRegister, 18);     // Short location.
  stream.AddDexRegisterEntry(Kind::kInFpuRegister, 3);   // Short location.
  stream.EndStackMapEntry();

  ArenaBitVector sp_mask3(&allocator, 0, true);
  sp_mask3.SetBit(1);
  sp_mask3.SetBit(5);
  stream.BeginStackMapEntry(2, 192 * kPcAlign, 0xAB, &sp_mask3, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kInRegister, 6);       // Short location.
  stream.AddDexRegisterEntry(Kind::kInRegisterHigh, 8);   // Short location.
  stream.EndStackMapEntry();

  ArenaBitVector sp_mask4(&allocator, 0, true);
  sp_mask4.SetBit(6);
  sp_mask4.SetBit(7);
  stream.BeginStackMapEntry(3, 256 * kPcAlign, 0xCD, &sp_mask4, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kInFpuRegister, 3);      // Short location, same in stack map 2.
  stream.AddDexRegisterEntry(Kind::kInFpuRegisterHigh, 1);  // Short location.
  stream.EndStackMapEntry();

  size_t size = stream.PrepareForFillIn();
  void* memory = allocator.Alloc(size, kArenaAllocMisc);
  MemoryRegion region(memory, size);
  stream.FillInCodeInfo(region);

  CodeInfo code_info(region);
  ASSERT_EQ(4u, code_info.GetNumberOfStackMaps());

  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
  ASSERT_EQ(7u, number_of_catalog_entries);

  // First stack map.
  {
    StackMap stack_map = code_info.GetStackMapAt(0);
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64 * kPcAlign)));
    ASSERT_EQ(0u, stack_map.GetDexPc());
    ASSERT_EQ(64u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
    ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));

    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask1));

    ASSERT_TRUE(stack_map.HasDexRegisterMap());
    DexRegisterMap dex_register_map =
        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
    ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
    ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
    ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters());

    ASSERT_EQ(Kind::kInStack, dex_register_map.GetLocationKind(0));
    ASSERT_EQ(Kind::kConstant, dex_register_map.GetLocationKind(1));
    ASSERT_EQ(0, dex_register_map.GetStackOffsetInBytes(0));
    ASSERT_EQ(-2, dex_register_map.GetConstant(1));

    DexRegisterLocation location0 = code_info.GetDexRegisterCatalogEntry(0);
    DexRegisterLocation location1 = code_info.GetDexRegisterCatalogEntry(1);
    ASSERT_EQ(Kind::kInStack, location0.GetKind());
    ASSERT_EQ(Kind::kConstant, location1.GetKind());
    ASSERT_EQ(0, location0.GetValue());
    ASSERT_EQ(-2, location1.GetValue());

    ASSERT_TRUE(stack_map.HasInlineInfo());
    InlineInfo inline_info0 = code_info.GetInlineInfoAtDepth(stack_map, 0);
    InlineInfo inline_info1 = code_info.GetInlineInfoAtDepth(stack_map, 1);
    ASSERT_EQ(2u, code_info.GetInlineDepthOf(stack_map));
    ASSERT_EQ(3u, inline_info0.GetDexPc());
    ASSERT_EQ(2u, inline_info1.GetDexPc());
    ASSERT_TRUE(inline_info0.EncodesArtMethod());
    ASSERT_TRUE(inline_info1.EncodesArtMethod());
  }

  // Second stack map.
  {
    StackMap stack_map = code_info.GetStackMapAt(1);
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(1u)));
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(128u * kPcAlign)));
    ASSERT_EQ(1u, stack_map.GetDexPc());
    ASSERT_EQ(128u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
    ASSERT_EQ(0xFFu, code_info.GetRegisterMaskOf(stack_map));

    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask2));

    ASSERT_TRUE(stack_map.HasDexRegisterMap());
    DexRegisterMap dex_register_map =
        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
    ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
    ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
    ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters());

    ASSERT_EQ(Kind::kInRegister, dex_register_map.GetLocationKind(0));
    ASSERT_EQ(Kind::kInFpuRegister, dex_register_map.GetLocationKind(1));
    ASSERT_EQ(18, dex_register_map.GetMachineRegister(0));
    ASSERT_EQ(3, dex_register_map.GetMachineRegister(1));

    DexRegisterLocation location0 = code_info.GetDexRegisterCatalogEntry(2);
    DexRegisterLocation location1 = code_info.GetDexRegisterCatalogEntry(3);
    ASSERT_EQ(Kind::kInRegister, location0.GetKind());
    ASSERT_EQ(Kind::kInFpuRegister, location1.GetKind());
    ASSERT_EQ(18, location0.GetValue());
    ASSERT_EQ(3, location1.GetValue());

    ASSERT_FALSE(stack_map.HasInlineInfo());
  }

  // Third stack map.
  {
    StackMap stack_map = code_info.GetStackMapAt(2);
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(2u)));
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(192u * kPcAlign)));
    ASSERT_EQ(2u, stack_map.GetDexPc());
    ASSERT_EQ(192u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
    ASSERT_EQ(0xABu, code_info.GetRegisterMaskOf(stack_map));

    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask3));

    ASSERT_TRUE(stack_map.HasDexRegisterMap());
    DexRegisterMap dex_register_map =
        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
    ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
    ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
    ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters());

    ASSERT_EQ(Kind::kInRegister, dex_register_map.GetLocationKind(0));
    ASSERT_EQ(Kind::kInRegisterHigh, dex_register_map.GetLocationKind(1));
    ASSERT_EQ(6, dex_register_map.GetMachineRegister(0));
    ASSERT_EQ(8, dex_register_map.GetMachineRegister(1));

    DexRegisterLocation location0 = code_info.GetDexRegisterCatalogEntry(4);
    DexRegisterLocation location1 = code_info.GetDexRegisterCatalogEntry(5);
    ASSERT_EQ(Kind::kInRegister, location0.GetKind());
    ASSERT_EQ(Kind::kInRegisterHigh, location1.GetKind());
    ASSERT_EQ(6, location0.GetValue());
    ASSERT_EQ(8, location1.GetValue());

    ASSERT_FALSE(stack_map.HasInlineInfo());
  }

  // Fourth stack map.
  {
    StackMap stack_map = code_info.GetStackMapAt(3);
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(3u)));
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(256u * kPcAlign)));
    ASSERT_EQ(3u, stack_map.GetDexPc());
    ASSERT_EQ(256u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
    ASSERT_EQ(0xCDu, code_info.GetRegisterMaskOf(stack_map));

    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask4));

    ASSERT_TRUE(stack_map.HasDexRegisterMap());
    DexRegisterMap dex_register_map =
        code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
    ASSERT_TRUE(dex_register_map.IsDexRegisterLive(0));
    ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
    ASSERT_EQ(2u, dex_register_map.GetNumberOfLiveDexRegisters());

    ASSERT_EQ(Kind::kInFpuRegister, dex_register_map.GetLocationKind(0));
    ASSERT_EQ(Kind::kInFpuRegisterHigh, dex_register_map.GetLocationKind(1));
    ASSERT_EQ(3, dex_register_map.GetMachineRegister(0));
    ASSERT_EQ(1, dex_register_map.GetMachineRegister(1));

    DexRegisterLocation location0 = code_info.GetDexRegisterCatalogEntry(3);
    DexRegisterLocation location1 = code_info.GetDexRegisterCatalogEntry(6);
    ASSERT_EQ(Kind::kInFpuRegister, location0.GetKind());
    ASSERT_EQ(Kind::kInFpuRegisterHigh, location1.GetKind());
    ASSERT_EQ(3, location0.GetValue());
    ASSERT_EQ(1, location1.GetValue());

    ASSERT_FALSE(stack_map.HasInlineInfo());
  }
}

TEST(StackMapTest, TestDeduplicateInlineInfoDexRegisterMap) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);
  ArtMethod art_method;

  ArenaBitVector sp_mask1(&allocator, 0, true);
  sp_mask1.SetBit(2);
  sp_mask1.SetBit(4);
  const size_t number_of_dex_registers = 2;
  const size_t number_of_dex_registers_in_inline_info = 2;
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask1, number_of_dex_registers, 1);
  stream.AddDexRegisterEntry(Kind::kInStack, 0);         // Short location.
  stream.AddDexRegisterEntry(Kind::kConstant, -2);       // Large location.
  stream.BeginInlineInfoEntry(&art_method, 3, number_of_dex_registers_in_inline_info);
  stream.AddDexRegisterEntry(Kind::kInStack, 0);         // Short location.
  stream.AddDexRegisterEntry(Kind::kConstant, -2);       // Large location.
  stream.EndInlineInfoEntry();
  stream.EndStackMapEntry();

  size_t size = stream.PrepareForFillIn();
  void* memory = allocator.Alloc(size, kArenaAllocMisc);
  MemoryRegion region(memory, size);
  stream.FillInCodeInfo(region);

  CodeInfo code_info(region);
  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps());

  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
  ASSERT_EQ(2u, number_of_catalog_entries);

  // First stack map.
  {
    StackMap stack_map = code_info.GetStackMapAt(0);
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
    ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64 * kPcAlign)));
    ASSERT_EQ(0u, stack_map.GetDexPc());
    ASSERT_EQ(64u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
    ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));

    ASSERT_TRUE(CheckStackMask(code_info, stack_map, sp_mask1));

    ASSERT_TRUE(stack_map.HasDexRegisterMap());
    DexRegisterMap map(code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers));
    ASSERT_TRUE(map.IsDexRegisterLive(0));
    ASSERT_TRUE(map.IsDexRegisterLive(1));
    ASSERT_EQ(2u, map.GetNumberOfLiveDexRegisters());

    ASSERT_EQ(Kind::kInStack, map.GetLocationKind(0));
    ASSERT_EQ(Kind::kConstant, map.GetLocationKind(1));
    ASSERT_EQ(0, map.GetStackOffsetInBytes(0));
    ASSERT_EQ(-2, map.GetConstant(1));

    DexRegisterLocation location0 = code_info.GetDexRegisterCatalogEntry(0);
    DexRegisterLocation location1 = code_info.GetDexRegisterCatalogEntry(1);
    ASSERT_EQ(Kind::kInStack, location0.GetKind());
    ASSERT_EQ(Kind::kConstant, location1.GetKind());
    ASSERT_EQ(0, location0.GetValue());
    ASSERT_EQ(-2, location1.GetValue());
  }
}

TEST(StackMapTest, TestNonLiveDexRegisters) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);

  ArenaBitVector sp_mask(&allocator, 0, false);
  uint32_t number_of_dex_registers = 2;
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kNone, 0);            // No location.
  stream.AddDexRegisterEntry(Kind::kConstant, -2);       // Large location.
  stream.EndStackMapEntry();

  size_t size = stream.PrepareForFillIn();
  void* memory = allocator.Alloc(size, kArenaAllocMisc);
  MemoryRegion region(memory, size);
  stream.FillInCodeInfo(region);

  CodeInfo code_info(region);
  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps());

  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
  ASSERT_EQ(1u, number_of_catalog_entries);

  StackMap stack_map = code_info.GetStackMapAt(0);
  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64 * kPcAlign)));
  ASSERT_EQ(0u, stack_map.GetDexPc());
  ASSERT_EQ(64u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));

  ASSERT_TRUE(stack_map.HasDexRegisterMap());
  DexRegisterMap dex_register_map =
      code_info.GetDexRegisterMapOf(stack_map, number_of_dex_registers);
  ASSERT_FALSE(dex_register_map.IsDexRegisterLive(0));
  ASSERT_TRUE(dex_register_map.IsDexRegisterLive(1));
  ASSERT_EQ(1u, dex_register_map.GetNumberOfLiveDexRegisters());

  ASSERT_EQ(Kind::kNone, dex_register_map.GetLocationKind(0));
  ASSERT_EQ(Kind::kConstant, dex_register_map.GetLocationKind(1));
  ASSERT_EQ(-2, dex_register_map.GetConstant(1));

  DexRegisterLocation location1 = code_info.GetDexRegisterCatalogEntry(0);
  ASSERT_EQ(Kind::kConstant, location1.GetKind());
  ASSERT_EQ(-2, location1.GetValue());

  ASSERT_FALSE(stack_map.HasInlineInfo());
}

TEST(StackMapTest, TestShareDexRegisterMap) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);

  ArenaBitVector sp_mask(&allocator, 0, false);
  uint32_t number_of_dex_registers = 2;
  // First stack map.
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kInRegister, 0);  // Short location.
  stream.AddDexRegisterEntry(Kind::kConstant, -2);   // Large location.
  stream.EndStackMapEntry();
  // Second stack map, which should share the same dex register map.
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kInRegister, 0);  // Short location.
  stream.AddDexRegisterEntry(Kind::kConstant, -2);   // Large location.
  stream.EndStackMapEntry();
  // Third stack map (doesn't share the dex register map).
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kInRegister, 2);  // Short location.
  stream.AddDexRegisterEntry(Kind::kConstant, -2);   // Large location.
  stream.EndStackMapEntry();

  size_t size = stream.PrepareForFillIn();
  void* memory = allocator.Alloc(size, kArenaAllocMisc);
  MemoryRegion region(memory, size);
  stream.FillInCodeInfo(region);

  CodeInfo ci(region);

  // Verify first stack map.
  StackMap sm0 = ci.GetStackMapAt(0);
  DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm0, number_of_dex_registers);
  ASSERT_EQ(0, dex_registers0.GetMachineRegister(0));
  ASSERT_EQ(-2, dex_registers0.GetConstant(1));

  // Verify second stack map.
  StackMap sm1 = ci.GetStackMapAt(1);
  DexRegisterMap dex_registers1 = ci.GetDexRegisterMapOf(sm1, number_of_dex_registers);
  ASSERT_EQ(0, dex_registers1.GetMachineRegister(0));
  ASSERT_EQ(-2, dex_registers1.GetConstant(1));

  // Verify third stack map.
  StackMap sm2 = ci.GetStackMapAt(2);
  DexRegisterMap dex_registers2 = ci.GetDexRegisterMapOf(sm2, number_of_dex_registers);
  ASSERT_EQ(2, dex_registers2.GetMachineRegister(0));
  ASSERT_EQ(-2, dex_registers2.GetConstant(1));

  // Verify dex register mask offsets.
  ASSERT_FALSE(sm1.HasDexRegisterMaskIndex());  // No delta.
  ASSERT_TRUE(sm2.HasDexRegisterMaskIndex());  // Has delta.
}

TEST(StackMapTest, TestNoDexRegisterMap) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);

  ArenaBitVector sp_mask(&allocator, 0, false);
  uint32_t number_of_dex_registers = 0;
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask, number_of_dex_registers, 0);
  stream.EndStackMapEntry();

  number_of_dex_registers = 1;
  stream.BeginStackMapEntry(1, 68 * kPcAlign, 0x4, &sp_mask, number_of_dex_registers, 0);
  stream.AddDexRegisterEntry(Kind::kNone, 0);
  stream.EndStackMapEntry();

  size_t size = stream.PrepareForFillIn();
  void* memory = allocator.Alloc(size, kArenaAllocMisc);
  MemoryRegion region(memory, size);
  stream.FillInCodeInfo(region);

  CodeInfo code_info(region);
  ASSERT_EQ(2u, code_info.GetNumberOfStackMaps());

  uint32_t number_of_catalog_entries = code_info.GetNumberOfLocationCatalogEntries();
  ASSERT_EQ(0u, number_of_catalog_entries);

  StackMap stack_map = code_info.GetStackMapAt(0);
  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(64 * kPcAlign)));
  ASSERT_EQ(0u, stack_map.GetDexPc());
  ASSERT_EQ(64u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
  ASSERT_EQ(0x3u, code_info.GetRegisterMaskOf(stack_map));

  ASSERT_FALSE(stack_map.HasDexRegisterMap());
  ASSERT_FALSE(stack_map.HasInlineInfo());

  stack_map = code_info.GetStackMapAt(1);
  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(1)));
  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePcOffset(68 * kPcAlign)));
  ASSERT_EQ(1u, stack_map.GetDexPc());
  ASSERT_EQ(68u * kPcAlign, stack_map.GetNativePcOffset(kRuntimeISA));
  ASSERT_EQ(0x4u, code_info.GetRegisterMaskOf(stack_map));

  ASSERT_TRUE(stack_map.HasDexRegisterMap());
  ASSERT_FALSE(stack_map.HasInlineInfo());
}

TEST(StackMapTest, InlineTest) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);
  ArtMethod art_method;

  ArenaBitVector sp_mask1(&allocator, 0, true);
  sp_mask1.SetBit(2);
  sp_mask1.SetBit(4);

  // First stack map.
  stream.BeginStackMapEntry(0, 64 * kPcAlign, 0x3, &sp_mask1, 2, 2);
  stream.AddDexRegisterEntry(Kind::kInStack, 0);
  stream.AddDexRegisterEntry(Kind::kConstant, 4);

  stream.BeginInlineInfoEntry(&art_method, 2, 1);
  stream.AddDexRegisterEntry(Kind::kInStack, 8);
  stream.EndInlineInfoEntry();
  stream.BeginInlineInfoEntry(&art_method, 3, 3);
  stream.AddDexRegisterEntry(Kind::kInStack, 16);
  stream.AddDexRegisterEntry(Kind::kConstant, 20);
  stream.AddDexRegisterEntry(Kind::kInRegister, 15);
  stream.EndInlineInfoEntry();

  stream.EndStackMapEntry();

  // Second stack map.
  stream.BeginStackMapEntry(2, 22 * kPcAlign, 0x3, &sp_mask1, 2, 3);
  stream.AddDexRegisterEntry(Kind::kInStack, 56);
  stream.AddDexRegisterEntry(Kind::kConstant, 0);

  stream.BeginInlineInfoEntry(&art_method, 2, 1);
  stream.AddDexRegisterEntry(Kind::kInStack, 12);
  stream.EndInlineInfoEntry();
  stream.BeginInlineInfoEntry(&art_method, 3, 3);
  stream.AddDexRegisterEntry(Kind::kInStack, 80);
  stream.AddDexRegisterEntry(Kind::kConstant, 10);
  stream.AddDexRegisterEntry(Kind::kInRegister, 5);
  stream.EndInlineInfoEntry();
  stream.BeginInlineInfoEntry(&art_method, 5, 0);
  stream.EndInlineInfoEntry();

  stream.EndStackMapEntry();

  // Third stack map.
  stream.BeginStackMapEntry(4, 56 * kPcAlign, 0x3, &sp_mask1, 2, 0);
  stream.AddDexRegisterEntry(Kind::kNone, 0);
  stream.AddDexRegisterEntry(Kind::kConstant, 4);
  stream.EndStackMapEntry();

  // Fourth stack map.
  stream.BeginStackMapEntry(6, 78 * kPcAlign, 0x3, &sp_mask1, 2, 3);
  stream.AddDexRegisterEntry(Kind::kInStack, 56);
  stream.AddDexRegisterEntry(Kind::kConstant, 0);

  stream.BeginInlineInfoEntry(&art_method, 2, 0);
  stream.EndInlineInfoEntry();
  stream.BeginInlineInfoEntry(&art_method, 5, 1);
  stream.AddDexRegisterEntry(Kind::kInRegister, 2);
  stream.EndInlineInfoEntry();
  stream.BeginInlineInfoEntry(&art_method, 10, 2);
  stream.AddDexRegisterEntry(Kind::kNone, 0);
  stream.AddDexRegisterEntry(Kind::kInRegister, 3);
  stream.EndInlineInfoEntry();

  stream.EndStackMapEntry();

  size_t size = stream.PrepareForFillIn();
  void* memory = allocator.Alloc(size, kArenaAllocMisc);
  MemoryRegion region(memory, size);
  stream.FillInCodeInfo(region);

  CodeInfo ci(region);

  {
    // Verify first stack map.
    StackMap sm0 = ci.GetStackMapAt(0);

    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm0, 2);
    ASSERT_EQ(0, dex_registers0.GetStackOffsetInBytes(0));
    ASSERT_EQ(4, dex_registers0.GetConstant(1));

    InlineInfo if0_0 = ci.GetInlineInfoAtDepth(sm0, 0);
    InlineInfo if0_1 = ci.GetInlineInfoAtDepth(sm0, 1);
    ASSERT_EQ(2u, ci.GetInlineDepthOf(sm0));
    ASSERT_EQ(2u, if0_0.GetDexPc());
    ASSERT_TRUE(if0_0.EncodesArtMethod());
    ASSERT_EQ(3u, if0_1.GetDexPc());
    ASSERT_TRUE(if0_1.EncodesArtMethod());

    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(0, sm0, 1);
    ASSERT_EQ(8, dex_registers1.GetStackOffsetInBytes(0));

    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(1, sm0, 3);
    ASSERT_EQ(16, dex_registers2.GetStackOffsetInBytes(0));
    ASSERT_EQ(20, dex_registers2.GetConstant(1));
    ASSERT_EQ(15, dex_registers2.GetMachineRegister(2));
  }

  {
    // Verify second stack map.
    StackMap sm1 = ci.GetStackMapAt(1);

    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm1, 2);
    ASSERT_EQ(56, dex_registers0.GetStackOffsetInBytes(0));
    ASSERT_EQ(0, dex_registers0.GetConstant(1));

    InlineInfo if1_0 = ci.GetInlineInfoAtDepth(sm1, 0);
    InlineInfo if1_1 = ci.GetInlineInfoAtDepth(sm1, 1);
    InlineInfo if1_2 = ci.GetInlineInfoAtDepth(sm1, 2);
    ASSERT_EQ(3u, ci.GetInlineDepthOf(sm1));
    ASSERT_EQ(2u, if1_0.GetDexPc());
    ASSERT_TRUE(if1_0.EncodesArtMethod());
    ASSERT_EQ(3u, if1_1.GetDexPc());
    ASSERT_TRUE(if1_1.EncodesArtMethod());
    ASSERT_EQ(5u, if1_2.GetDexPc());
    ASSERT_TRUE(if1_2.EncodesArtMethod());

    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(0, sm1, 1);
    ASSERT_EQ(12, dex_registers1.GetStackOffsetInBytes(0));

    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(1, sm1, 3);
    ASSERT_EQ(80, dex_registers2.GetStackOffsetInBytes(0));
    ASSERT_EQ(10, dex_registers2.GetConstant(1));
    ASSERT_EQ(5, dex_registers2.GetMachineRegister(2));
  }

  {
    // Verify third stack map.
    StackMap sm2 = ci.GetStackMapAt(2);

    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm2, 2);
    ASSERT_FALSE(dex_registers0.IsDexRegisterLive(0));
    ASSERT_EQ(4, dex_registers0.GetConstant(1));
    ASSERT_FALSE(sm2.HasInlineInfo());
  }

  {
    // Verify fourth stack map.
    StackMap sm3 = ci.GetStackMapAt(3);

    DexRegisterMap dex_registers0 = ci.GetDexRegisterMapOf(sm3, 2);
    ASSERT_EQ(56, dex_registers0.GetStackOffsetInBytes(0));
    ASSERT_EQ(0, dex_registers0.GetConstant(1));

    InlineInfo if2_0 = ci.GetInlineInfoAtDepth(sm3, 0);
    InlineInfo if2_1 = ci.GetInlineInfoAtDepth(sm3, 1);
    InlineInfo if2_2 = ci.GetInlineInfoAtDepth(sm3, 2);
    ASSERT_EQ(3u, ci.GetInlineDepthOf(sm3));
    ASSERT_EQ(2u, if2_0.GetDexPc());
    ASSERT_TRUE(if2_0.EncodesArtMethod());
    ASSERT_EQ(5u, if2_1.GetDexPc());
    ASSERT_TRUE(if2_1.EncodesArtMethod());
    ASSERT_EQ(10u, if2_2.GetDexPc());
    ASSERT_TRUE(if2_2.EncodesArtMethod());

    DexRegisterMap dex_registers1 = ci.GetDexRegisterMapAtDepth(1, sm3, 1);
    ASSERT_EQ(2, dex_registers1.GetMachineRegister(0));

    DexRegisterMap dex_registers2 = ci.GetDexRegisterMapAtDepth(2, sm3, 2);
    ASSERT_FALSE(dex_registers2.IsDexRegisterLive(0));
    ASSERT_EQ(3, dex_registers2.GetMachineRegister(1));
  }
}

TEST(StackMapTest, PackedNativePcTest) {
  // Test minimum alignments, and decoding.
  uint32_t packed_thumb2 =
      StackMap::PackNativePc(kThumb2InstructionAlignment, InstructionSet::kThumb2);
  uint32_t packed_arm64 =
      StackMap::PackNativePc(kArm64InstructionAlignment, InstructionSet::kArm64);
  uint32_t packed_x86 =
      StackMap::PackNativePc(kX86InstructionAlignment, InstructionSet::kX86);
  uint32_t packed_x86_64 =
      StackMap::PackNativePc(kX86_64InstructionAlignment, InstructionSet::kX86_64);
  uint32_t packed_mips =
      StackMap::PackNativePc(kMipsInstructionAlignment, InstructionSet::kMips);
  uint32_t packed_mips64 =
      StackMap::PackNativePc(kMips64InstructionAlignment, InstructionSet::kMips64);
  EXPECT_EQ(StackMap::UnpackNativePc(packed_thumb2, InstructionSet::kThumb2),
            kThumb2InstructionAlignment);
  EXPECT_EQ(StackMap::UnpackNativePc(packed_arm64, InstructionSet::kArm64),
            kArm64InstructionAlignment);
  EXPECT_EQ(StackMap::UnpackNativePc(packed_x86, InstructionSet::kX86),
            kX86InstructionAlignment);
  EXPECT_EQ(StackMap::UnpackNativePc(packed_x86_64, InstructionSet::kX86_64),
            kX86_64InstructionAlignment);
  EXPECT_EQ(StackMap::UnpackNativePc(packed_mips, InstructionSet::kMips),
            kMipsInstructionAlignment);
  EXPECT_EQ(StackMap::UnpackNativePc(packed_mips64, InstructionSet::kMips64),
            kMips64InstructionAlignment);
}

TEST(StackMapTest, TestDeduplicateStackMask) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);

  ArenaBitVector sp_mask(&allocator, 0, true);
  sp_mask.SetBit(1);
  sp_mask.SetBit(4);
  stream.BeginStackMapEntry(0, 4 * kPcAlign, 0x3, &sp_mask, 0, 0);
  stream.EndStackMapEntry();
  stream.BeginStackMapEntry(0, 8 * kPcAlign, 0x3, &sp_mask, 0, 0);
  stream.EndStackMapEntry();

  size_t size = stream.PrepareForFillIn();
  void* memory = allocator.Alloc(size, kArenaAllocMisc);
  MemoryRegion region(memory, size);
  stream.FillInCodeInfo(region);

  CodeInfo code_info(region);
  ASSERT_EQ(2u, code_info.GetNumberOfStackMaps());

  StackMap stack_map1 = code_info.GetStackMapForNativePcOffset(4 * kPcAlign);
  StackMap stack_map2 = code_info.GetStackMapForNativePcOffset(8 * kPcAlign);
  EXPECT_EQ(stack_map1.GetStackMaskIndex(),
            stack_map2.GetStackMaskIndex());
}

TEST(StackMapTest, TestInvokeInfo) {
  MallocArenaPool pool;
  ArenaStack arena_stack(&pool);
  ScopedArenaAllocator allocator(&arena_stack);
  StackMapStream stream(&allocator, kRuntimeISA);

  ArenaBitVector sp_mask(&allocator, 0, true);
  sp_mask.SetBit(1);
  stream.BeginStackMapEntry(0, 4 * kPcAlign, 0x3, &sp_mask, 0, 0);
  stream.AddInvoke(kSuper, 1);
  stream.EndStackMapEntry();
  stream.BeginStackMapEntry(0, 8 * kPcAlign, 0x3, &sp_mask, 0, 0);
  stream.AddInvoke(kStatic, 3);
  stream.EndStackMapEntry();
  stream.BeginStackMapEntry(0, 16 * kPcAlign, 0x3, &sp_mask, 0, 0);
  stream.AddInvoke(kDirect, 65535);
  stream.EndStackMapEntry();

  const size_t code_info_size = stream.PrepareForFillIn();
  MemoryRegion code_info_region(allocator.Alloc(code_info_size, kArenaAllocMisc), code_info_size);
  stream.FillInCodeInfo(code_info_region);

  const size_t method_info_size = stream.ComputeMethodInfoSize();
  MemoryRegion method_info_region(allocator.Alloc(method_info_size, kArenaAllocMisc),
                                  method_info_size);
  stream.FillInMethodInfo(method_info_region);

  CodeInfo code_info(code_info_region);
  MethodInfo method_info(method_info_region.begin());
  ASSERT_EQ(3u, code_info.GetNumberOfStackMaps());

  InvokeInfo invoke1(code_info.GetInvokeInfoForNativePcOffset(4 * kPcAlign));
  InvokeInfo invoke2(code_info.GetInvokeInfoForNativePcOffset(8 * kPcAlign));
  InvokeInfo invoke3(code_info.GetInvokeInfoForNativePcOffset(16 * kPcAlign));
  InvokeInfo invoke_invalid(code_info.GetInvokeInfoForNativePcOffset(12));
  EXPECT_FALSE(invoke_invalid.IsValid());  // No entry for that index.
  EXPECT_TRUE(invoke1.IsValid());
  EXPECT_TRUE(invoke2.IsValid());
  EXPECT_TRUE(invoke3.IsValid());
  EXPECT_EQ(invoke1.GetInvokeType(), kSuper);
  EXPECT_EQ(invoke1.GetMethodIndex(method_info), 1u);
  EXPECT_EQ(invoke1.GetNativePcOffset(kRuntimeISA), 4u * kPcAlign);
  EXPECT_EQ(invoke2.GetInvokeType(), kStatic);
  EXPECT_EQ(invoke2.GetMethodIndex(method_info), 3u);
  EXPECT_EQ(invoke2.GetNativePcOffset(kRuntimeISA), 8u * kPcAlign);
  EXPECT_EQ(invoke3.GetInvokeType(), kDirect);
  EXPECT_EQ(invoke3.GetMethodIndex(method_info), 65535u);
  EXPECT_EQ(invoke3.GetNativePcOffset(kRuntimeISA), 16u * kPcAlign);
}

}  // namespace art