1 // Copyright 2011 the V8 project authors. All rights reserved.
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3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
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15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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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 "cctest.h"
30 #include "assembler.h"
31
32 namespace v8 {
33 namespace internal {
34
WriteRinfo(RelocInfoWriter * writer,byte * pc,RelocInfo::Mode mode,intptr_t data)35 static 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.
TEST(Positions)44 TEST(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;
51 byte* buffer_end = *buffer + 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, 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;
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;
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;
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