Dmitry Petrochenko | 135016a | 2014-04-03 14:35:54 +0700 | [diff] [blame^] | 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_indirect_reference_table.h" |
| 18 | #include "gtest/gtest.h" |
| 19 | |
| 20 | namespace art { |
| 21 | |
| 22 | // Test the offsets computed for members of StackIndirectReferenceTable. Because of cross-compiling |
| 23 | // it is impossible the use OFFSETOF_MEMBER, so we do some reasonable computations ourselves. This |
| 24 | // test checks whether we do the right thing. |
| 25 | TEST(StackIndirectReferenceTableTest, Offsets) { |
| 26 | // As the members of StackIndirectReferenceTable are private, we cannot use OFFSETOF_MEMBER |
| 27 | // here. So do the inverse: set some data, and access it through pointers created from the offsets. |
| 28 | |
| 29 | StackIndirectReferenceTable test_table(reinterpret_cast<mirror::Object*>(0x1234)); |
| 30 | test_table.SetLink(reinterpret_cast<StackIndirectReferenceTable*>(0x5678)); |
| 31 | test_table.SetNumberOfReferences(0x9ABC); |
| 32 | |
| 33 | byte* table_base_ptr = reinterpret_cast<byte*>(&test_table); |
| 34 | |
| 35 | { |
| 36 | uintptr_t* link_ptr = reinterpret_cast<uintptr_t*>(table_base_ptr + |
| 37 | StackIndirectReferenceTable::LinkOffset(kPointerSize)); |
| 38 | EXPECT_EQ(*link_ptr, static_cast<size_t>(0x5678)); |
| 39 | } |
| 40 | |
| 41 | { |
| 42 | uint32_t* num_ptr = reinterpret_cast<uint32_t*>(table_base_ptr + |
| 43 | StackIndirectReferenceTable::NumberOfReferencesOffset(kPointerSize)); |
| 44 | EXPECT_EQ(*num_ptr, static_cast<size_t>(0x9ABC)); |
| 45 | } |
| 46 | |
| 47 | { |
| 48 | // Assume sizeof(StackReference<mirror::Object>) == sizeof(uint32_t) |
| 49 | // TODO: How can we make this assumption-less but still access directly and fully? |
| 50 | EXPECT_EQ(sizeof(StackReference<mirror::Object>), sizeof(uint32_t)); |
| 51 | |
| 52 | uint32_t* ref_ptr = reinterpret_cast<uint32_t*>(table_base_ptr + |
| 53 | StackIndirectReferenceTable::ReferencesOffset(kPointerSize)); |
| 54 | EXPECT_EQ(*ref_ptr, static_cast<uint32_t>(0x1234)); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | } // namespace art |