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 = Isolate::Current(); 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 MacroAssembler* masm = &assembler; 86 87 // Code to be generated: The stuff in CopyBytes followed by a store of R0 and 88 // R1, respectively. 89 __ CopyBytes(r0, r1, r2, r3); 90 __ mov(r2, Operand(reinterpret_cast<int>(&r0_))); 91 __ mov(r3, Operand(reinterpret_cast<int>(&r1_))); 92 __ str(r0, MemOperand(r2)); 93 __ str(r1, MemOperand(r3)); 94 __ bx(lr); 95 96 CodeDesc desc; 97 masm->GetCode(&desc); 98 Handle<Code> code = isolate->factory()->NewCode( 99 desc, Code::ComputeFlags(Code::STUB), Handle<Code>()); 100 101 F f = FUNCTION_CAST<F>(code->entry()); 102 103 // Initialise source data with non-zero bytes. 104 for (int i = 0; i < data_size; i++) { 105 src_buffer[i] = to_non_zero(i); 106 } 107 108 const int fuzz = 11; 109 110 for (int size = 0; size < 600; size++) { 111 for (const byte* src = src_buffer; src < src_buffer + fuzz; src++) { 112 for (byte* dest = dest_buffer; dest < dest_buffer + fuzz; dest++) { 113 memset(dest_buffer, 0, data_size); 114 CHECK(dest + size < dest_buffer + data_size); 115 (void) CALL_GENERATED_CODE(f, reinterpret_cast<int>(src), 116 reinterpret_cast<int>(dest), size, 0, 0); 117 // R0 and R1 should point at the first byte after the copied data. 118 CHECK_EQ(src + size, r0_); 119 CHECK_EQ(dest + size, r1_); 120 // Check that we haven't written outside the target area. 121 CHECK(all_zeroes(dest_buffer, dest)); 122 CHECK(all_zeroes(dest + size, dest_buffer + data_size)); 123 // Check the target area. 124 CHECK_EQ(0, memcmp(src, dest, size)); 125 } 126 } 127 } 128 129 // Check that the source data hasn't been clobbered. 130 for (int i = 0; i < data_size; i++) { 131 CHECK(src_buffer[i] == to_non_zero(i)); 132 } 133 } 134 135 136 typedef int (*F5)(void*, void*, void*, void*, void*); 137 138 139 TEST(LoadAndStoreWithRepresentation) { 140 // Allocate an executable page of memory. 141 size_t actual_size; 142 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate( 143 Assembler::kMinimalBufferSize, &actual_size, true)); 144 CHECK(buffer); 145 Isolate* isolate = CcTest::i_isolate(); 146 HandleScope handles(isolate); 147 MacroAssembler assembler(isolate, buffer, static_cast<int>(actual_size)); 148 MacroAssembler* masm = &assembler; // Create a pointer for the __ macro. 149 __ sub(sp, sp, Operand(1 * kPointerSize)); 150 Label exit; 151 152 // Test 1. 153 __ mov(r0, Operand(1)); // Test number. 154 __ mov(r1, Operand(0)); 155 __ str(r1, MemOperand(sp, 0 * kPointerSize)); 156 __ mov(r2, Operand(-1)); 157 __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::UInteger8()); 158 __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); 159 __ mov(r2, Operand(255)); 160 __ cmp(r3, r2); 161 __ b(ne, &exit); 162 __ mov(r2, Operand(255)); 163 __ Load(r3, MemOperand(sp, 0 * kPointerSize), Representation::UInteger8()); 164 __ cmp(r3, r2); 165 __ b(ne, &exit); 166 167 // Test 2. 168 __ mov(r0, Operand(2)); // Test number. 169 __ mov(r1, Operand(0)); 170 __ str(r1, MemOperand(sp, 0 * kPointerSize)); 171 __ mov(r2, Operand(-1)); 172 __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::Integer8()); 173 __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); 174 __ mov(r2, Operand(255)); 175 __ cmp(r3, r2); 176 __ b(ne, &exit); 177 __ mov(r2, Operand(-1)); 178 __ Load(r3, MemOperand(sp, 0 * kPointerSize), Representation::Integer8()); 179 __ cmp(r3, r2); 180 __ b(ne, &exit); 181 182 // Test 3. 183 __ mov(r0, Operand(3)); // Test number. 184 __ mov(r1, Operand(0)); 185 __ str(r1, MemOperand(sp, 0 * kPointerSize)); 186 __ mov(r2, Operand(-1)); 187 __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::UInteger16()); 188 __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); 189 __ mov(r2, Operand(65535)); 190 __ cmp(r3, r2); 191 __ b(ne, &exit); 192 __ mov(r2, Operand(65535)); 193 __ Load(r3, MemOperand(sp, 0 * kPointerSize), Representation::UInteger16()); 194 __ cmp(r3, r2); 195 __ b(ne, &exit); 196 197 // Test 4. 198 __ mov(r0, Operand(4)); // Test number. 199 __ mov(r1, Operand(0)); 200 __ str(r1, MemOperand(sp, 0 * kPointerSize)); 201 __ mov(r2, Operand(-1)); 202 __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::Integer16()); 203 __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); 204 __ mov(r2, Operand(65535)); 205 __ cmp(r3, r2); 206 __ b(ne, &exit); 207 __ mov(r2, Operand(-1)); 208 __ Load(r3, MemOperand(sp, 0 * kPointerSize), Representation::Integer16()); 209 __ cmp(r3, r2); 210 __ b(ne, &exit); 211 212 __ mov(r0, Operand(0)); // Success. 213 __ bind(&exit); 214 __ add(sp, sp, Operand(1 * kPointerSize)); 215 __ bx(lr); 216 217 CodeDesc desc; 218 masm->GetCode(&desc); 219 Handle<Code> code = isolate->factory()->NewCode( 220 desc, Code::ComputeFlags(Code::STUB), Handle<Code>()); 221 222 // Call the function from C++. 223 F5 f = FUNCTION_CAST<F5>(code->entry()); 224 CHECK_EQ(0, CALL_GENERATED_CODE(f, 0, 0, 0, 0, 0)); 225 } 226 227 #undef __ 228
