1 // Copyright 2016 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "src/objects.h"
6 #include "test/cctest/cctest.h"
7
8 using namespace v8::internal;
9
TEST(CodeLayoutWithoutUnwindingInfo)10 TEST(CodeLayoutWithoutUnwindingInfo) {
11 CcTest::InitializeVM();
12 HandleScope handle_scope(CcTest::i_isolate());
13
14 // "Hello, World!" in ASCII.
15 byte buffer_array[13] = {0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x2c, 0x20,
16 0x57, 0x6f, 0x72, 0x6c, 0x64, 0x21};
17
18 byte* buffer = &buffer_array[0];
19 int buffer_size = sizeof(buffer_array);
20
21 CodeDesc code_desc;
22 code_desc.buffer = buffer;
23 code_desc.buffer_size = buffer_size;
24 code_desc.constant_pool_size = 0;
25 code_desc.instr_size = buffer_size;
26 code_desc.reloc_size = 0;
27 code_desc.origin = nullptr;
28 code_desc.unwinding_info = nullptr;
29 code_desc.unwinding_info_size = 0;
30
31 Handle<Code> code = CcTest::i_isolate()->factory()->NewCode(
32 code_desc, 0, Handle<Object>::null());
33
34 CHECK(!code->has_unwinding_info());
35 CHECK_EQ(code->instruction_size(), buffer_size);
36 CHECK_EQ(memcmp(code->instruction_start(), buffer, buffer_size), 0);
37 CHECK_EQ(code->instruction_end() - reinterpret_cast<byte*>(*code),
38 Code::kHeaderSize + buffer_size - kHeapObjectTag);
39 }
40
TEST(CodeLayoutWithUnwindingInfo)41 TEST(CodeLayoutWithUnwindingInfo) {
42 CcTest::InitializeVM();
43 HandleScope handle_scope(CcTest::i_isolate());
44
45 // "Hello, World!" in ASCII.
46 byte buffer_array[13] = {0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x2c, 0x20,
47 0x57, 0x6f, 0x72, 0x6c, 0x64, 0x21};
48
49 // "JavaScript" in ASCII.
50 byte unwinding_info_array[10] = {0x4a, 0x61, 0x76, 0x61, 0x53,
51 0x63, 0x72, 0x69, 0x70, 0x74};
52
53 byte* buffer = &buffer_array[0];
54 int buffer_size = sizeof(buffer_array);
55 byte* unwinding_info = &unwinding_info_array[0];
56 int unwinding_info_size = sizeof(unwinding_info_array);
57
58 CodeDesc code_desc;
59 code_desc.buffer = buffer;
60 code_desc.buffer_size = buffer_size;
61 code_desc.constant_pool_size = 0;
62 code_desc.instr_size = buffer_size;
63 code_desc.reloc_size = 0;
64 code_desc.origin = nullptr;
65 code_desc.unwinding_info = unwinding_info;
66 code_desc.unwinding_info_size = unwinding_info_size;
67
68 Handle<Code> code = CcTest::i_isolate()->factory()->NewCode(
69 code_desc, 0, Handle<Object>::null());
70
71 CHECK(code->has_unwinding_info());
72 CHECK_EQ(code->instruction_size(), buffer_size);
73 CHECK_EQ(memcmp(code->instruction_start(), buffer, buffer_size), 0);
74 CHECK(IsAligned(code->GetUnwindingInfoSizeOffset(), 8));
75 CHECK_EQ(code->unwinding_info_size(), unwinding_info_size);
76 CHECK(
77 IsAligned(reinterpret_cast<uintptr_t>(code->unwinding_info_start()), 8));
78 CHECK_EQ(
79 memcmp(code->unwinding_info_start(), unwinding_info, unwinding_info_size),
80 0);
81 CHECK_EQ(code->unwinding_info_end() - reinterpret_cast<byte*>(*code),
82 Code::kHeaderSize + RoundUp(buffer_size, kInt64Size) + kInt64Size +
83 unwinding_info_size - kHeapObjectTag);
84 }
85