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/*
* Copyright (C) 2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WasmBBQDisassembler.h"
#if ENABLE(WEBASSEMBLY_B3JIT)
#include "Disassembler.h"
#include "LinkBuffer.h"
#include <wtf/HexNumber.h>
#include <wtf/StringPrintStream.h>
namespace JSC {
namespace Wasm {
BBQDisassembler::BBQDisassembler() = default;
BBQDisassembler::~BBQDisassembler() = default;
void BBQDisassembler::dump(PrintStream& out, LinkBuffer& linkBuffer)
{
m_codeStart = linkBuffer.entrypoint<DisassemblyPtrTag>().untaggedPtr();
m_codeEnd = bitwise_cast<uint8_t*>(m_codeStart) + linkBuffer.size();
dumpHeader(out, linkBuffer);
if (m_labels.isEmpty())
dumpDisassembly(out, linkBuffer, m_startOfCode, m_endOfCode);
else {
dumpDisassembly(out, linkBuffer, m_startOfCode, std::get<0>(m_labels[0]));
dumpForInstructions(out, linkBuffer, " ", m_labels, m_endOfOpcode);
out.print(" (End Of Main Code)\n");
dumpDisassembly(out, linkBuffer, m_endOfOpcode, m_endOfCode);
}
}
void BBQDisassembler::dump(LinkBuffer& linkBuffer)
{
dump(WTF::dataFile(), linkBuffer);
}
void BBQDisassembler::dumpHeader(PrintStream& out, LinkBuffer& linkBuffer)
{
out.print(" Code at [", RawPointer(linkBuffer.debugAddress()), ", ", RawPointer(static_cast<char*>(linkBuffer.debugAddress()) + linkBuffer.size()), "):\n");
}
Vector<BBQDisassembler::DumpedOp> BBQDisassembler::dumpVectorForInstructions(LinkBuffer& linkBuffer, const char* prefix, Vector<std::tuple<MacroAssembler::Label, OpType, size_t>>& labels, MacroAssembler::Label endLabel)
{
StringPrintStream out;
Vector<DumpedOp> result;
for (unsigned i = 0; i < labels.size();) {
out.reset();
auto opcode = std::get<1>(labels[i]);
auto offset = std::get<2>(labels[i]);
result.append(DumpedOp { { } });
out.print(prefix);
out.println("[", makeString(pad(' ', 8, makeString("0x", hex(offset, 0, Lowercase)))), "] ", makeString(opcode));
unsigned nextIndex = i + 1;
if (nextIndex >= labels.size()) {
dumpDisassembly(out, linkBuffer, std::get<0>(labels[i]), endLabel);
result.last().disassembly = out.toCString();
return result;
}
dumpDisassembly(out, linkBuffer, std::get<0>(labels[i]), std::get<0>(labels[nextIndex]));
result.last().disassembly = out.toCString();
i = nextIndex;
}
return result;
}
void BBQDisassembler::dumpForInstructions(PrintStream& out, LinkBuffer& linkBuffer, const char* prefix, Vector<std::tuple<MacroAssembler::Label, OpType, size_t>>& labels, MacroAssembler::Label endLabel)
{
Vector<DumpedOp> dumpedOps = dumpVectorForInstructions(linkBuffer, prefix, labels, endLabel);
for (unsigned i = 0; i < dumpedOps.size(); ++i)
out.print(dumpedOps[i].disassembly);
}
void BBQDisassembler::dumpDisassembly(PrintStream& out, LinkBuffer& linkBuffer, MacroAssembler::Label from, MacroAssembler::Label to)
{
CodeLocationLabel<DisassemblyPtrTag> fromLocation = linkBuffer.locationOf<DisassemblyPtrTag>(from);
CodeLocationLabel<DisassemblyPtrTag> toLocation = linkBuffer.locationOf<DisassemblyPtrTag>(to);
disassemble(fromLocation, toLocation.dataLocation<uintptr_t>() - fromLocation.dataLocation<uintptr_t>(), m_codeStart, m_codeEnd, " ", out);
}
} // namespace Wasm
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY_B3JIT)
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