1// Copyright 2011 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
29#include "src/assembler.h"
30#include "test/cctest/cctest.h"
31
32namespace v8 {
33namespace internal {
34
35static void WriteRinfo(RelocInfoWriter* writer,
36                       byte* pc, RelocInfo::Mode mode, intptr_t data) {
37  RelocInfo rinfo(pc, mode, data, NULL);
38  writer->Write(&rinfo);
39}
40
41
42// Tests that writing both types of positions and then reading either
43// or both works as expected.
44TEST(Positions) {
45  const int code_size = 10 * KB;
46  int relocation_info_size = 10 * KB;
47  const int buffer_size = code_size + relocation_info_size;
48  SmartArrayPointer<byte> buffer(new byte[buffer_size]);
49
50  byte* pc = buffer.get();
51  byte* buffer_end = buffer.get() + buffer_size;
52
53  RelocInfoWriter writer(buffer_end, pc);
54  byte* relocation_info_end = buffer_end - relocation_info_size;
55  for (int i = 0, pos = 0; i < 100; i++, pc += i, pos += i) {
56    RelocInfo::Mode mode = (i % 2 == 0) ?
57        RelocInfo::STATEMENT_POSITION : RelocInfo::POSITION;
58    WriteRinfo(&writer, pc, mode, pos);
59    CHECK(writer.pos() - RelocInfoWriter::kMaxSize >= relocation_info_end);
60  }
61
62  relocation_info_size = static_cast<int>(buffer_end - writer.pos());
63  CodeDesc desc = { buffer.get(), buffer_size, code_size,
64                    relocation_info_size, NULL };
65
66  // Read only (non-statement) positions.
67  {
68    RelocIterator it(desc, RelocInfo::ModeMask(RelocInfo::POSITION));
69    pc = buffer.get();
70    for (int i = 0, pos = 0; i < 100; i++, pc += i, pos += i) {
71      RelocInfo::Mode mode = (i % 2 == 0) ?
72          RelocInfo::STATEMENT_POSITION : RelocInfo::POSITION;
73      if (mode == RelocInfo::POSITION) {
74        CHECK_EQ(pc, it.rinfo()->pc());
75        CHECK_EQ(mode, it.rinfo()->rmode());
76        CHECK_EQ(pos, static_cast<int>(it.rinfo()->data()));
77        it.next();
78      }
79    }
80    CHECK(it.done());
81  }
82
83  // Read only statement positions.
84  {
85    RelocIterator it(desc, RelocInfo::ModeMask(RelocInfo::STATEMENT_POSITION));
86    pc = buffer.get();
87    for (int i = 0, pos = 0; i < 100; i++, pc += i, pos += i) {
88      RelocInfo::Mode mode = (i % 2 == 0) ?
89          RelocInfo::STATEMENT_POSITION : RelocInfo::POSITION;
90      if (mode == RelocInfo::STATEMENT_POSITION) {
91        CHECK_EQ(pc, it.rinfo()->pc());
92        CHECK_EQ(mode, it.rinfo()->rmode());
93        CHECK_EQ(pos, static_cast<int>(it.rinfo()->data()));
94        it.next();
95      }
96    }
97    CHECK(it.done());
98  }
99
100  // Read both types of positions.
101  {
102    RelocIterator it(desc, RelocInfo::kPositionMask);
103    pc = buffer.get();
104    for (int i = 0, pos = 0; i < 100; i++, pc += i, pos += i) {
105      RelocInfo::Mode mode = (i % 2 == 0) ?
106          RelocInfo::STATEMENT_POSITION : RelocInfo::POSITION;
107      CHECK_EQ(pc, it.rinfo()->pc());
108      CHECK_EQ(mode, it.rinfo()->rmode());
109      CHECK_EQ(pos, static_cast<int>(it.rinfo()->data()));
110      it.next();
111    }
112    CHECK(it.done());
113  }
114}
115
116} }  // namespace v8::internal
117