Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1 | // Copyright 2016 the V8 project authors. All rights reserved. Use of this |
| 2 | // source code is governed by a BSD-style license that can be found in the |
| 3 | // LICENSE file. |
| 4 | |
| 5 | #include <cmath> |
| 6 | #include <functional> |
| 7 | #include <limits> |
| 8 | |
| 9 | #include "src/base/bits.h" |
| 10 | #include "src/base/utils/random-number-generator.h" |
| 11 | #include "src/codegen.h" |
| 12 | #include "test/cctest/cctest.h" |
| 13 | #include "test/cctest/compiler/codegen-tester.h" |
| 14 | #include "test/cctest/compiler/graph-builder-tester.h" |
| 15 | #include "test/cctest/compiler/value-helper.h" |
| 16 | |
| 17 | using namespace v8::internal; |
| 18 | using namespace v8::internal::compiler; |
| 19 | |
| 20 | static void UpdateMemoryReferences(Handle<Code> code, Address old_base, |
| 21 | Address new_base, uint32_t old_size, |
| 22 | uint32_t new_size) { |
| 23 | Isolate* isolate = CcTest::i_isolate(); |
| 24 | bool modified = false; |
| 25 | int mode_mask = RelocInfo::ModeMask(RelocInfo::WASM_MEMORY_REFERENCE) | |
| 26 | RelocInfo::ModeMask(RelocInfo::WASM_MEMORY_SIZE_REFERENCE); |
| 27 | for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) { |
| 28 | RelocInfo::Mode mode = it.rinfo()->rmode(); |
| 29 | if (RelocInfo::IsWasmMemoryReference(mode) || |
| 30 | RelocInfo::IsWasmMemorySizeReference(mode)) { |
| 31 | // Patch addresses with change in memory start address |
| 32 | it.rinfo()->update_wasm_memory_reference(old_base, new_base, old_size, |
| 33 | new_size); |
| 34 | modified = true; |
| 35 | } |
| 36 | } |
| 37 | if (modified) { |
| 38 | Assembler::FlushICache(isolate, code->instruction_start(), |
| 39 | code->instruction_size()); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | template <typename CType> |
| 44 | static void RunLoadStoreRelocation(MachineType rep) { |
| 45 | const int kNumElems = 2; |
| 46 | CType buffer[kNumElems]; |
| 47 | CType new_buffer[kNumElems]; |
| 48 | byte* raw = reinterpret_cast<byte*>(buffer); |
| 49 | byte* new_raw = reinterpret_cast<byte*>(new_buffer); |
| 50 | for (size_t i = 0; i < sizeof(buffer); i++) { |
| 51 | raw[i] = static_cast<byte>((i + sizeof(CType)) ^ 0xAA); |
| 52 | new_raw[i] = static_cast<byte>((i + sizeof(CType)) ^ 0xAA); |
| 53 | } |
| 54 | int32_t OK = 0x29000; |
| 55 | RawMachineAssemblerTester<uint32_t> m; |
| 56 | Node* base = m.RelocatableIntPtrConstant(reinterpret_cast<intptr_t>(raw), |
| 57 | RelocInfo::WASM_MEMORY_REFERENCE); |
| 58 | Node* base1 = m.RelocatableIntPtrConstant( |
| 59 | reinterpret_cast<intptr_t>(raw + sizeof(CType)), |
| 60 | RelocInfo::WASM_MEMORY_REFERENCE); |
| 61 | Node* index = m.Int32Constant(0); |
| 62 | Node* load = m.Load(rep, base, index); |
| 63 | m.Store(rep.representation(), base1, index, load, kNoWriteBarrier); |
| 64 | m.Return(m.Int32Constant(OK)); |
| 65 | CHECK(buffer[0] != buffer[1]); |
| 66 | CHECK_EQ(OK, m.Call()); |
| 67 | CHECK(buffer[0] == buffer[1]); |
| 68 | m.GenerateCode(); |
| 69 | Handle<Code> code = m.GetCode(); |
| 70 | UpdateMemoryReferences(code, raw, new_raw, sizeof(buffer), |
| 71 | sizeof(new_buffer)); |
| 72 | CHECK(new_buffer[0] != new_buffer[1]); |
| 73 | CHECK_EQ(OK, m.Call()); |
| 74 | CHECK(new_buffer[0] == new_buffer[1]); |
| 75 | } |
| 76 | |
| 77 | TEST(RunLoadStoreRelocation) { |
| 78 | RunLoadStoreRelocation<int8_t>(MachineType::Int8()); |
| 79 | RunLoadStoreRelocation<uint8_t>(MachineType::Uint8()); |
| 80 | RunLoadStoreRelocation<int16_t>(MachineType::Int16()); |
| 81 | RunLoadStoreRelocation<uint16_t>(MachineType::Uint16()); |
| 82 | RunLoadStoreRelocation<int32_t>(MachineType::Int32()); |
| 83 | RunLoadStoreRelocation<uint32_t>(MachineType::Uint32()); |
| 84 | RunLoadStoreRelocation<void*>(MachineType::AnyTagged()); |
| 85 | RunLoadStoreRelocation<float>(MachineType::Float32()); |
| 86 | RunLoadStoreRelocation<double>(MachineType::Float64()); |
| 87 | } |
| 88 | |
| 89 | template <typename CType> |
| 90 | static void RunLoadStoreRelocationOffset(MachineType rep) { |
| 91 | RawMachineAssemblerTester<int32_t> r(MachineType::Int32()); |
| 92 | const int kNumElems = 4; |
| 93 | CType buffer[kNumElems]; |
| 94 | CType new_buffer[kNumElems + 1]; |
| 95 | |
| 96 | for (int32_t x = 0; x < kNumElems; x++) { |
| 97 | int32_t y = kNumElems - x - 1; |
| 98 | // initialize the buffer with raw data. |
| 99 | byte* raw = reinterpret_cast<byte*>(buffer); |
| 100 | for (size_t i = 0; i < sizeof(buffer); i++) { |
| 101 | raw[i] = static_cast<byte>((i + sizeof(buffer)) ^ 0xAA); |
| 102 | } |
| 103 | |
| 104 | RawMachineAssemblerTester<int32_t> m; |
| 105 | int32_t OK = 0x29000 + x; |
| 106 | Node* base = m.RelocatableIntPtrConstant(reinterpret_cast<intptr_t>(buffer), |
| 107 | RelocInfo::WASM_MEMORY_REFERENCE); |
| 108 | Node* index0 = m.IntPtrConstant(x * sizeof(buffer[0])); |
| 109 | Node* load = m.Load(rep, base, index0); |
| 110 | Node* index1 = m.IntPtrConstant(y * sizeof(buffer[0])); |
| 111 | m.Store(rep.representation(), base, index1, load, kNoWriteBarrier); |
| 112 | m.Return(m.Int32Constant(OK)); |
| 113 | |
| 114 | CHECK(buffer[x] != buffer[y]); |
| 115 | CHECK_EQ(OK, m.Call()); |
| 116 | CHECK(buffer[x] == buffer[y]); |
| 117 | m.GenerateCode(); |
| 118 | |
| 119 | // Initialize new buffer and set old_buffer to 0 |
| 120 | byte* new_raw = reinterpret_cast<byte*>(new_buffer); |
| 121 | for (size_t i = 0; i < sizeof(buffer); i++) { |
| 122 | raw[i] = 0; |
| 123 | new_raw[i] = static_cast<byte>((i + sizeof(buffer)) ^ 0xAA); |
| 124 | } |
| 125 | |
| 126 | // Perform relocation on generated code |
| 127 | Handle<Code> code = m.GetCode(); |
| 128 | UpdateMemoryReferences(code, raw, new_raw, sizeof(buffer), |
| 129 | sizeof(new_buffer)); |
| 130 | |
| 131 | CHECK(new_buffer[x] != new_buffer[y]); |
| 132 | CHECK_EQ(OK, m.Call()); |
| 133 | CHECK(new_buffer[x] == new_buffer[y]); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | TEST(RunLoadStoreRelocationOffset) { |
| 138 | RunLoadStoreRelocationOffset<int8_t>(MachineType::Int8()); |
| 139 | RunLoadStoreRelocationOffset<uint8_t>(MachineType::Uint8()); |
| 140 | RunLoadStoreRelocationOffset<int16_t>(MachineType::Int16()); |
| 141 | RunLoadStoreRelocationOffset<uint16_t>(MachineType::Uint16()); |
| 142 | RunLoadStoreRelocationOffset<int32_t>(MachineType::Int32()); |
| 143 | RunLoadStoreRelocationOffset<uint32_t>(MachineType::Uint32()); |
| 144 | RunLoadStoreRelocationOffset<void*>(MachineType::AnyTagged()); |
| 145 | RunLoadStoreRelocationOffset<float>(MachineType::Float32()); |
| 146 | RunLoadStoreRelocationOffset<double>(MachineType::Float64()); |
| 147 | } |
| 148 | |
| 149 | TEST(Uint32LessThanRelocation) { |
| 150 | RawMachineAssemblerTester<uint32_t> m; |
| 151 | RawMachineLabel within_bounds, out_of_bounds; |
| 152 | Node* index = m.Int32Constant(0x200); |
| 153 | Node* limit = |
| 154 | m.RelocatableInt32Constant(0x200, RelocInfo::WASM_MEMORY_SIZE_REFERENCE); |
| 155 | Node* cond = m.AddNode(m.machine()->Uint32LessThan(), index, limit); |
| 156 | m.Branch(cond, &within_bounds, &out_of_bounds); |
| 157 | m.Bind(&within_bounds); |
| 158 | m.Return(m.Int32Constant(0xaced)); |
| 159 | m.Bind(&out_of_bounds); |
| 160 | m.Return(m.Int32Constant(0xdeadbeef)); |
| 161 | // Check that index is out of bounds with current size |
| 162 | CHECK_EQ(0xdeadbeef, m.Call()); |
| 163 | m.GenerateCode(); |
| 164 | |
| 165 | Handle<Code> code = m.GetCode(); |
| 166 | UpdateMemoryReferences(code, reinterpret_cast<Address>(1234), |
| 167 | reinterpret_cast<Address>(1234), 0x200, 0x400); |
| 168 | // Check that after limit is increased, index is within bounds. |
| 169 | CHECK_EQ(0xaced, m.Call()); |
| 170 | } |