1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #include <stdlib.h> 29 30 #include "src/v8.h" 31 #include "test/cctest/cctest.h" 32 33 #include "src/macro-assembler.h" 34 35 #include "src/arm/macro-assembler-arm.h" 36 #include "src/arm/simulator-arm.h" 37 38 39 using namespace v8::internal; 40 41 typedef void* (*F)(int x, int y, int p2, int p3, int p4); 42 43 #define __ masm-> 44 45 46 static byte to_non_zero(int n) { 47 return static_cast<unsigned>(n) % 255 + 1; 48 } 49 50 51 static bool all_zeroes(const byte* beg, const byte* end) { 52 CHECK(beg); 53 CHECK(beg <= end); 54 while (beg < end) { 55 if (*beg++ != 0) 56 return false; 57 } 58 return true; 59 } 60 61 62 TEST(CopyBytes) { 63 CcTest::InitializeVM(); 64 Isolate* isolate = CcTest::i_isolate(); 65 HandleScope handles(isolate); 66 67 const int data_size = 1 * KB; 68 size_t act_size; 69 70 // Allocate two blocks to copy data between. 71 byte* src_buffer = 72 static_cast<byte*>(v8::base::OS::Allocate(data_size, &act_size, 0)); 73 CHECK(src_buffer); 74 CHECK(act_size >= static_cast<size_t>(data_size)); 75 byte* dest_buffer = 76 static_cast<byte*>(v8::base::OS::Allocate(data_size, &act_size, 0)); 77 CHECK(dest_buffer); 78 CHECK(act_size >= static_cast<size_t>(data_size)); 79 80 // Storage for R0 and R1. 81 byte* r0_; 82 byte* r1_; 83 84 MacroAssembler assembler(isolate, NULL, 0, 85 v8::internal::CodeObjectRequired::kYes); 86 MacroAssembler* masm = &assembler; 87 88 // Code to be generated: The stuff in CopyBytes followed by a store of R0 and 89 // R1, respectively. 90 __ CopyBytes(r0, r1, r2, r3); 91 __ mov(r2, Operand(reinterpret_cast<int>(&r0_))); 92 __ mov(r3, Operand(reinterpret_cast<int>(&r1_))); 93 __ str(r0, MemOperand(r2)); 94 __ str(r1, MemOperand(r3)); 95 __ bx(lr); 96 97 CodeDesc desc; 98 masm->GetCode(&desc); 99 Handle<Code> code = isolate->factory()->NewCode( 100 desc, Code::ComputeFlags(Code::STUB), Handle<Code>()); 101 102 F f = FUNCTION_CAST<F>(code->entry()); 103 104 // Initialise source data with non-zero bytes. 105 for (int i = 0; i < data_size; i++) { 106 src_buffer[i] = to_non_zero(i); 107 } 108 109 const int fuzz = 11; 110 111 for (int size = 0; size < 600; size++) { 112 for (const byte* src = src_buffer; src < src_buffer + fuzz; src++) { 113 for (byte* dest = dest_buffer; dest < dest_buffer + fuzz; dest++) { 114 memset(dest_buffer, 0, data_size); 115 CHECK(dest + size < dest_buffer + data_size); 116 (void)CALL_GENERATED_CODE(isolate, f, reinterpret_cast<int>(src), 117 reinterpret_cast<int>(dest), size, 0, 0); 118 // R0 and R1 should point at the first byte after the copied data. 119 CHECK_EQ(src + size, r0_); 120 CHECK_EQ(dest + size, r1_); 121 // Check that we haven't written outside the target area. 122 CHECK(all_zeroes(dest_buffer, dest)); 123 CHECK(all_zeroes(dest + size, dest_buffer + data_size)); 124 // Check the target area. 125 CHECK_EQ(0, memcmp(src, dest, size)); 126 } 127 } 128 } 129 130 // Check that the source data hasn't been clobbered. 131 for (int i = 0; i < data_size; i++) { 132 CHECK(src_buffer[i] == to_non_zero(i)); 133 } 134 } 135 136 137 typedef int (*F5)(void*, void*, void*, void*, void*); 138 139 140 TEST(LoadAndStoreWithRepresentation) { 141 // Allocate an executable page of memory. 142 size_t actual_size; 143 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate( 144 Assembler::kMinimalBufferSize, &actual_size, true)); 145 CHECK(buffer); 146 Isolate* isolate = CcTest::i_isolate(); 147 HandleScope handles(isolate); 148 MacroAssembler assembler(isolate, buffer, static_cast<int>(actual_size), 149 v8::internal::CodeObjectRequired::kYes); 150 MacroAssembler* masm = &assembler; // Create a pointer for the __ macro. 151 __ sub(sp, sp, Operand(1 * kPointerSize)); 152 Label exit; 153 154 // Test 1. 155 __ mov(r0, Operand(1)); // Test number. 156 __ mov(r1, Operand(0)); 157 __ str(r1, MemOperand(sp, 0 * kPointerSize)); 158 __ mov(r2, Operand(-1)); 159 __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::UInteger8()); 160 __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); 161 __ mov(r2, Operand(255)); 162 __ cmp(r3, r2); 163 __ b(ne, &exit); 164 __ mov(r2, Operand(255)); 165 __ Load(r3, MemOperand(sp, 0 * kPointerSize), Representation::UInteger8()); 166 __ cmp(r3, r2); 167 __ b(ne, &exit); 168 169 // Test 2. 170 __ mov(r0, Operand(2)); // Test number. 171 __ mov(r1, Operand(0)); 172 __ str(r1, MemOperand(sp, 0 * kPointerSize)); 173 __ mov(r2, Operand(-1)); 174 __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::Integer8()); 175 __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); 176 __ mov(r2, Operand(255)); 177 __ cmp(r3, r2); 178 __ b(ne, &exit); 179 __ mov(r2, Operand(-1)); 180 __ Load(r3, MemOperand(sp, 0 * kPointerSize), Representation::Integer8()); 181 __ cmp(r3, r2); 182 __ b(ne, &exit); 183 184 // Test 3. 185 __ mov(r0, Operand(3)); // Test number. 186 __ mov(r1, Operand(0)); 187 __ str(r1, MemOperand(sp, 0 * kPointerSize)); 188 __ mov(r2, Operand(-1)); 189 __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::UInteger16()); 190 __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); 191 __ mov(r2, Operand(65535)); 192 __ cmp(r3, r2); 193 __ b(ne, &exit); 194 __ mov(r2, Operand(65535)); 195 __ Load(r3, MemOperand(sp, 0 * kPointerSize), Representation::UInteger16()); 196 __ cmp(r3, r2); 197 __ b(ne, &exit); 198 199 // Test 4. 200 __ mov(r0, Operand(4)); // Test number. 201 __ mov(r1, Operand(0)); 202 __ str(r1, MemOperand(sp, 0 * kPointerSize)); 203 __ mov(r2, Operand(-1)); 204 __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::Integer16()); 205 __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); 206 __ mov(r2, Operand(65535)); 207 __ cmp(r3, r2); 208 __ b(ne, &exit); 209 __ mov(r2, Operand(-1)); 210 __ Load(r3, MemOperand(sp, 0 * kPointerSize), Representation::Integer16()); 211 __ cmp(r3, r2); 212 __ b(ne, &exit); 213 214 __ mov(r0, Operand(0)); // Success. 215 __ bind(&exit); 216 __ add(sp, sp, Operand(1 * kPointerSize)); 217 __ bx(lr); 218 219 CodeDesc desc; 220 masm->GetCode(&desc); 221 Handle<Code> code = isolate->factory()->NewCode( 222 desc, Code::ComputeFlags(Code::STUB), Handle<Code>()); 223 224 // Call the function from C++. 225 F5 f = FUNCTION_CAST<F5>(code->entry()); 226 CHECK(!CALL_GENERATED_CODE(isolate, f, 0, 0, 0, 0, 0)); 227 } 228 229 #undef __ 230
