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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#include "src/mips/macro-assembler-mips.h"
35#include "src/mips/simulator-mips.h"
36
37
38using namespace v8::internal;
39
40typedef void* (*F)(int x, int y, int p2, int p3, int p4);
41
42#define __ masm->
43
44
45static byte to_non_zero(int n) {
46  return static_cast<unsigned>(n) % 255 + 1;
47}
48
49
50static bool all_zeroes(const byte* beg, const byte* end) {
51  CHECK(beg);
52  CHECK(beg <= end);
53  while (beg < end) {
54    if (*beg++ != 0)
55      return false;
56  }
57  return true;
58}
59
60
61TEST(CopyBytes) {
62  CcTest::InitializeVM();
63  Isolate* isolate = Isolate::Current();
64  HandleScope handles(isolate);
65
66  const int data_size = 1 * KB;
67  size_t act_size;
68
69  // Allocate two blocks to copy data between.
70  byte* src_buffer =
71      static_cast<byte*>(v8::base::OS::Allocate(data_size, &act_size, 0));
72  CHECK(src_buffer);
73  CHECK(act_size >= static_cast<size_t>(data_size));
74  byte* dest_buffer =
75      static_cast<byte*>(v8::base::OS::Allocate(data_size, &act_size, 0));
76  CHECK(dest_buffer);
77  CHECK(act_size >= static_cast<size_t>(data_size));
78
79  // Storage for a0 and a1.
80  byte* a0_;
81  byte* a1_;
82
83  MacroAssembler assembler(isolate, NULL, 0);
84  MacroAssembler* masm = &assembler;
85
86  // Code to be generated: The stuff in CopyBytes followed by a store of a0 and
87  // a1, respectively.
88  __ CopyBytes(a0, a1, a2, a3);
89  __ li(a2, Operand(reinterpret_cast<int>(&a0_)));
90  __ li(a3, Operand(reinterpret_cast<int>(&a1_)));
91  __ sw(a0, MemOperand(a2));
92  __ jr(ra);
93  __ sw(a1, MemOperand(a3));
94
95  CodeDesc desc;
96  masm->GetCode(&desc);
97  Handle<Code> code = isolate->factory()->NewCode(
98      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
99
100  ::F f = FUNCTION_CAST< ::F>(code->entry());
101
102  // Initialise source data with non-zero bytes.
103  for (int i = 0; i < data_size; i++) {
104    src_buffer[i] = to_non_zero(i);
105  }
106
107  const int fuzz = 11;
108
109  for (int size = 0; size < 600; size++) {
110    for (const byte* src = src_buffer; src < src_buffer + fuzz; src++) {
111      for (byte* dest = dest_buffer; dest < dest_buffer + fuzz; dest++) {
112        memset(dest_buffer, 0, data_size);
113        CHECK(dest + size < dest_buffer + data_size);
114        (void) CALL_GENERATED_CODE(f, reinterpret_cast<int>(src),
115                                      reinterpret_cast<int>(dest), size, 0, 0);
116        // a0 and a1 should point at the first byte after the copied data.
117        CHECK_EQ(src + size, a0_);
118        CHECK_EQ(dest + size, a1_);
119        // Check that we haven't written outside the target area.
120        CHECK(all_zeroes(dest_buffer, dest));
121        CHECK(all_zeroes(dest + size, dest_buffer + data_size));
122        // Check the target area.
123        CHECK_EQ(0, memcmp(src, dest, size));
124      }
125    }
126  }
127
128  // Check that the source data hasn't been clobbered.
129  for (int i = 0; i < data_size; i++) {
130    CHECK(src_buffer[i] == to_non_zero(i));
131  }
132}
133
134
135static void TestNaN(const char *code) {
136  // NaN value is different on MIPS and x86 architectures, and TEST(NaNx)
137  // tests checks the case where a x86 NaN value is serialized into the
138  // snapshot on the simulator during cross compilation.
139  v8::HandleScope scope(CcTest::isolate());
140  v8::Local<v8::Context> context = CcTest::NewContext(PRINT_EXTENSION);
141  v8::Context::Scope context_scope(context);
142
143  v8::Local<v8::Script> script = v8::Script::Compile(v8_str(code));
144  v8::Local<v8::Object> result = v8::Local<v8::Object>::Cast(script->Run());
145  // Have to populate the handle manually, as it's not Cast-able.
146  i::Handle<i::JSObject> o =
147      v8::Utils::OpenHandle<v8::Object, i::JSObject>(result);
148  i::Handle<i::JSArray> array1(reinterpret_cast<i::JSArray*>(*o));
149  i::FixedDoubleArray* a = i::FixedDoubleArray::cast(array1->elements());
150  double value = a->get_scalar(0);
151  CHECK(std::isnan(value) &&
152        bit_cast<uint64_t>(value) ==
153            bit_cast<uint64_t>(
154                i::FixedDoubleArray::canonical_not_the_hole_nan_as_double()));
155}
156
157
158TEST(NaN0) {
159  TestNaN(
160          "var result;"
161          "for (var i = 0; i < 2; i++) {"
162          "  result = new Array(Number.NaN, Number.POSITIVE_INFINITY);"
163          "}"
164          "result;");
165}
166
167
168TEST(NaN1) {
169  TestNaN(
170          "var result;"
171          "for (var i = 0; i < 2; i++) {"
172          "  result = [NaN];"
173          "}"
174          "result;");
175}
176
177
178#undef __
179