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/*
* Copyright (C) 2025 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.
*/
#pragma once
#if ENABLE(WEBASSEMBLY)
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
#include <wtf/HexNumber.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/StringView.h>
namespace JSC {
class CallFrame;
class JSWebAssemblyInstance;
namespace IPInt {
struct IPIntLocal;
} // namespace IPInt
namespace Wasm {
class VirtualAddress;
enum class TypeKind : int8_t;
struct Type;
enum class ProtocolError : uint8_t {
None = 0,
InvalidPacket = 1,
InvalidAddress = 2,
InvalidRegister = 3,
MemoryError = 4,
UnknownCommand = 5
};
class StepIntoEvent {
public:
using BitField = uint8_t;
enum Event : BitField {
NoEvent = 0,
StepIntoCall = 1 << 0, // Step into a function call
StepIntoThrow = 1 << 1, // Step into an exception handler
};
StepIntoEvent() = default;
void set(Event event)
{
RELEASE_ASSERT(!hasAny());
RELEASE_ASSERT(event == StepIntoCall || event == StepIntoThrow);
m_event = event;
}
bool take(Event event)
{
if (m_event == event) {
m_event = NoEvent;
return true;
}
return false;
}
bool hasAny() const { return m_event != NoEvent; }
private:
BitField m_event { NoEvent };
};
struct Breakpoint {
enum class Type : uint8_t {
// User-set breakpoint (persistent, tracked by virtual address)
Regular = 0,
// One-time breakpoint (auto-removed after each stop)
Interrupt = 1,
Step = 2,
};
Breakpoint() = default;
Breakpoint(uint8_t* pc, Type type)
: type(type)
, pc(pc)
, originalBytecode(*pc)
{
}
void patchBreakpoint() { *pc = 0x00; }
void restorePatch() { *pc = originalBytecode; }
bool isOneTimeBreakpoint() { return type != Type::Regular; }
void dump(PrintStream& out) const
{
out.print("Breakpoint(type:", type);
out.print(", pc:", RawPointer(pc));
out.print(", *pc:", (int)*pc);
out.print(", originalBytecode:", originalBytecode, ")");
}
Type type { Type::Regular };
uint8_t* pc { nullptr };
uint8_t originalBytecode { 0 };
};
template<typename T>
inline String toNativeEndianHex(const T& value)
{
static_assert(sizeof(T) == 1 || sizeof(T) == 2 || sizeof(T) == 4 || sizeof(T) == 8 || sizeof(T) == 16,
"toNativeEndianHex only supports 1, 2, 4, 8, or 16 byte types");
StringBuilder hexString;
const uint8_t* bytes = reinterpret_cast<const uint8_t*>(&value);
for (size_t i = 0; i < sizeof(T); i++)
hexString.append(hex(bytes[i], 2, Lowercase));
return hexString.toString();
}
String stringToHex(StringView);
void logWasmLocalValue(size_t index, const JSC::IPInt::IPIntLocal&, const Wasm::Type&);
uint64_t parseHex(StringView, uint64_t defaultValue = 0);
uint32_t parseDecimal(StringView, uint32_t defaultValue = 0);
Vector<StringView> splitWithDelimiters(StringView packet, StringView delimiters);
bool getWasmReturnPC(CallFrame* currentFrame, uint8_t*& returnPC, VirtualAddress& virtualReturnPC);
} // namespace Wasm
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#endif // ENABLE(WEBASSEMBLY)
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