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/*
* Copyright (C) 2012-2023 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 "Disassembler.h"
#include "MacroAssemblerCodeRef.h"
#include <wtf/Condition.h>
#include <wtf/DataLog.h>
#include <wtf/Deque.h>
#include <wtf/Lock.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/SystemFree.h>
#include <wtf/TZoneMallocInlines.h>
#include <wtf/Threading.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
namespace Disassembler {
Lock labelMapLock;
using LabelMap = UncheckedKeyHashMap<void*, Variant<CString, const char*>>;
LazyNeverDestroyed<LabelMap> labelMap;
static LabelMap& ensureLabelMap() WTF_REQUIRES_LOCK(labelMapLock)
{
static std::once_flag onceKey;
std::call_once(onceKey, [] {
labelMap.construct();
});
return labelMap.get();
}
} // namespace Disassembler
void disassemble(const CodePtr<DisassemblyPtrTag>& codePtr, size_t size, void* codeStart, void* codeEnd, const char* prefix, PrintStream& out)
{
if (tryToDisassemble(codePtr, size, codeStart, codeEnd, prefix, out))
return;
out.printf("%sdisassembly not available for range %p...%p\n", prefix, codePtr.untaggedPtr(), codePtr.untaggedPtr<char*>() + size);
}
void registerLabel(void* thunkAddress, CString&& label)
{
Locker lock { Disassembler::labelMapLock };
Disassembler::ensureLabelMap().add(thunkAddress, WTFMove(label));
}
void registerLabel(void* address, const char* label)
{
Locker lock { Disassembler::labelMapLock };
Disassembler::ensureLabelMap().add(address, label);
}
const char* labelFor(void* thunkAddress)
{
Locker lock { Disassembler::labelMapLock };
auto& map = Disassembler::ensureLabelMap();
auto it = map.find(thunkAddress);
if (it == map.end())
return nullptr;
if (std::holds_alternative<CString>(it->value))
return std::get<CString>(it->value).data();
return std::get<const char*>(it->value);
}
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
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