stack_map_test.cc revision 99ea58cc68b51837c065f4a2a54efbf208dd76fa 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "stack_map.h"
18#include "stack_map_stream.h"
19#include "utils/arena_bit_vector.h"
20
21#include "gtest/gtest.h"
22
23namespace art {
24
25bool SameBits(MemoryRegion region, const BitVector& bit_vector) {
26  for (size_t i = 0; i < region.size_in_bits(); ++i) {
27    if (region.LoadBit(i) != bit_vector.IsBitSet(i)) {
28      return false;
29    }
30  }
31  return true;
32}
33
34TEST(StackMapTest, Test1) {
35  ArenaPool pool;
36  ArenaAllocator arena(&pool);
37  StackMapStream<size_t> stream(&arena);
38
39  ArenaBitVector sp_mask(&arena, 0, false);
40  stream.AddStackMapEntry(0, 64, 0x3, &sp_mask, 2, 0);
41  stream.AddDexRegisterEntry(DexRegisterMap::kInStack, 0);
42  stream.AddDexRegisterEntry(DexRegisterMap::kConstant, -2);
43
44  size_t size = stream.ComputeNeededSize();
45  void* memory = arena.Alloc(size, kArenaAllocMisc);
46  MemoryRegion region(memory, size);
47  stream.FillIn(region);
48
49  CodeInfo<size_t> code_info(region);
50  ASSERT_EQ(0u, code_info.GetStackMaskSize());
51  ASSERT_EQ(1u, code_info.GetNumberOfStackMaps());
52
53  StackMap<size_t> stack_map = code_info.GetStackMapAt(0);
54  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
55  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePc(64)));
56  ASSERT_EQ(0u, stack_map.GetDexPc());
57  ASSERT_EQ(64u, stack_map.GetNativePc());
58  ASSERT_EQ(0x3u, stack_map.GetRegisterMask());
59  ASSERT_FALSE(stack_map.HasInlineInfo());
60
61  MemoryRegion stack_mask = stack_map.GetStackMask();
62  ASSERT_TRUE(SameBits(stack_mask, sp_mask));
63
64  DexRegisterMap dex_registers = code_info.GetDexRegisterMapOf(stack_map, 2);
65  ASSERT_EQ(DexRegisterMap::kInStack, dex_registers.GetLocationKind(0));
66  ASSERT_EQ(DexRegisterMap::kConstant, dex_registers.GetLocationKind(1));
67  ASSERT_EQ(0, dex_registers.GetValue(0));
68  ASSERT_EQ(-2, dex_registers.GetValue(1));
69}
70
71TEST(StackMapTest, Test2) {
72  ArenaPool pool;
73  ArenaAllocator arena(&pool);
74  StackMapStream<size_t> stream(&arena);
75
76  ArenaBitVector sp_mask1(&arena, 0, true);
77  sp_mask1.SetBit(2);
78  sp_mask1.SetBit(4);
79  stream.AddStackMapEntry(0, 64, 0x3, &sp_mask1, 2, 2);
80  stream.AddDexRegisterEntry(DexRegisterMap::kInStack, 0);
81  stream.AddDexRegisterEntry(DexRegisterMap::kConstant, -2);
82  stream.AddInlineInfoEntry(42);
83  stream.AddInlineInfoEntry(82);
84
85  ArenaBitVector sp_mask2(&arena, 0, true);
86  sp_mask2.SetBit(3);
87  sp_mask1.SetBit(8);
88  stream.AddStackMapEntry(1, 128, 0xFF, &sp_mask2, 1, 0);
89  stream.AddDexRegisterEntry(DexRegisterMap::kInRegister, 0);
90
91  size_t size = stream.ComputeNeededSize();
92  void* memory = arena.Alloc(size, kArenaAllocMisc);
93  MemoryRegion region(memory, size);
94  stream.FillIn(region);
95
96  CodeInfo<size_t> code_info(region);
97  ASSERT_EQ(1u, code_info.GetStackMaskSize());
98  ASSERT_EQ(2u, code_info.GetNumberOfStackMaps());
99
100  StackMap<size_t> stack_map = code_info.GetStackMapAt(0);
101  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(0)));
102  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePc(64)));
103  ASSERT_EQ(0u, stack_map.GetDexPc());
104  ASSERT_EQ(64u, stack_map.GetNativePc());
105  ASSERT_EQ(0x3u, stack_map.GetRegisterMask());
106
107  MemoryRegion stack_mask = stack_map.GetStackMask();
108  ASSERT_TRUE(SameBits(stack_mask, sp_mask1));
109
110  DexRegisterMap dex_registers = code_info.GetDexRegisterMapOf(stack_map, 2);
111  ASSERT_EQ(DexRegisterMap::kInStack, dex_registers.GetLocationKind(0));
112  ASSERT_EQ(DexRegisterMap::kConstant, dex_registers.GetLocationKind(1));
113  ASSERT_EQ(0, dex_registers.GetValue(0));
114  ASSERT_EQ(-2, dex_registers.GetValue(1));
115
116  InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map);
117  ASSERT_EQ(2u, inline_info.GetDepth());
118  ASSERT_EQ(42u, inline_info.GetMethodReferenceIndexAtDepth(0));
119  ASSERT_EQ(82u, inline_info.GetMethodReferenceIndexAtDepth(1));
120
121  stack_map = code_info.GetStackMapAt(1);
122  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForDexPc(1u)));
123  ASSERT_TRUE(stack_map.Equals(code_info.GetStackMapForNativePc(128u)));
124  ASSERT_EQ(1u, stack_map.GetDexPc());
125  ASSERT_EQ(128u, stack_map.GetNativePc());
126  ASSERT_EQ(0xFFu, stack_map.GetRegisterMask());
127
128  stack_mask = stack_map.GetStackMask();
129  ASSERT_TRUE(SameBits(stack_mask, sp_mask2));
130
131  ASSERT_FALSE(stack_map.HasInlineInfo());
132}
133
134}  // namespace art
135