1/*
2 * Copyright (C) 2012, 2013, 2014 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ProfilerBytecodeSequence.h"
28
29#include "CodeBlock.h"
30#include "JSGlobalObject.h"
31#include "Operands.h"
32#include "JSCInlines.h"
33#include <wtf/StringPrintStream.h>
34
35namespace JSC { namespace Profiler {
36
37BytecodeSequence::BytecodeSequence(CodeBlock* codeBlock)
38{
39    StringPrintStream out;
40
41    for (unsigned i = 0; i < codeBlock->numberOfArgumentValueProfiles(); ++i) {
42        ConcurrentJITLocker locker(codeBlock->m_lock);
43        CString description = codeBlock->valueProfileForArgument(i)->briefDescription(locker);
44        if (!description.length())
45            continue;
46        out.reset();
47        out.print("arg", i, " (r", virtualRegisterForArgument(i).offset(), "): ", description);
48        m_header.append(out.toCString());
49    }
50
51    StubInfoMap stubInfos;
52    codeBlock->getStubInfoMap(stubInfos);
53
54    for (unsigned bytecodeIndex = 0; bytecodeIndex < codeBlock->instructions().size();) {
55        out.reset();
56        codeBlock->dumpBytecode(out, bytecodeIndex, stubInfos);
57        m_sequence.append(Bytecode(bytecodeIndex, codeBlock->vm()->interpreter->getOpcodeID(codeBlock->instructions()[bytecodeIndex].u.opcode), out.toCString()));
58        bytecodeIndex += opcodeLength(
59            codeBlock->vm()->interpreter->getOpcodeID(
60                codeBlock->instructions()[bytecodeIndex].u.opcode));
61    }
62}
63
64BytecodeSequence::~BytecodeSequence()
65{
66}
67
68unsigned BytecodeSequence::indexForBytecodeIndex(unsigned bytecodeIndex) const
69{
70    return binarySearch<Bytecode, unsigned>(m_sequence, m_sequence.size(), bytecodeIndex, getBytecodeIndexForBytecode) - m_sequence.begin();
71}
72
73const Bytecode& BytecodeSequence::forBytecodeIndex(unsigned bytecodeIndex) const
74{
75    return at(indexForBytecodeIndex(bytecodeIndex));
76}
77
78void BytecodeSequence::addSequenceProperties(ExecState* exec, JSObject* result) const
79{
80    JSArray* header = constructEmptyArray(exec, 0);
81    for (unsigned i = 0; i < m_header.size(); ++i)
82        header->putDirectIndex(exec, i, jsString(exec, String::fromUTF8(m_header[i])));
83    result->putDirect(exec->vm(), exec->propertyNames().header, header);
84
85    JSArray* sequence = constructEmptyArray(exec, 0);
86    for (unsigned i = 0; i < m_sequence.size(); ++i)
87        sequence->putDirectIndex(exec, i, m_sequence[i].toJS(exec));
88    result->putDirect(exec->vm(), exec->propertyNames().bytecode, sequence);
89}
90
91} } // namespace JSC::Profiler
92
93