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Signals.cpp implementation for Windows
https://bugs.webkit.org/show_bug.cgi?id=259108 Reviewed by Yusuke Suzuki. Signals is implemented using a VectoredExceptionHandler on Windows, so we cannot support all the Signal types as the other OS's. We need support for AccessFault, which is used for WASM memory. Test: Tools/TestWebKitAPI/Tests/WTF/Signals.cpp * Source/JavaScriptCore/wasm/WasmFaultSignalHandler.cpp: * Source/JavaScriptCore/wasm/WasmFaultSignalHandler.h: * Source/WTF/wtf/PlatformJSCOnly.cmake: * Source/WTF/wtf/PlatformWin.cmake: * Source/WTF/wtf/WTFConfig.h: * Source/WTF/wtf/threads/Signals.cpp: (WTF::toSystemSignal): (WTF::fromSystemSignal): * Source/WTF/wtf/threads/Signals.h: (WTF::toSystemSignal): Deleted. (WTF::fromSystemSignal): Deleted. * Source/WTF/wtf/win/SignalsWin.cpp: Added. (WTF::SignalHandlers::add): (WTF::SignalHandlers::forEachHandler const): (WTF::fromSystemException): (WTF::vectoredHandler): (WTF::addSignalHandler): (WTF::activateSignalHandlersFor): (WTF::SignalHandlers::initialize): * Tools/TestWebKitAPI/CMakeLists.txt: * Tools/TestWebKitAPI/Tests/WTF/Signals.cpp: (TEST): Canonical link: https://commits.webkit.org/266716@main
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/* | ||
* Copyright (C) 2023 Ian Grunert <ian.grunert@gmail.com> | ||
* | ||
* 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. | ||
*/ | ||
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#include "config.h" | ||
#include <wtf/threads/Signals.h> | ||
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#if OS(WINDOWS) | ||
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#include <cstdio> | ||
#include <mutex> | ||
#include <signal.h> | ||
#include <winnt.h> | ||
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#include <wtf/Atomics.h> | ||
#include <wtf/DataLog.h> | ||
#include <wtf/MathExtras.h> | ||
#include <wtf/NeverDestroyed.h> | ||
#include <wtf/PlatformRegisters.h> | ||
#include <wtf/ThreadGroup.h> | ||
#include <wtf/Threading.h> | ||
#include <wtf/WTFConfig.h> | ||
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namespace WTF { | ||
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void SignalHandlers::add(Signal signal, SignalHandler&& handler) | ||
{ | ||
Config::AssertNotFrozenScope assertScope; | ||
static Lock lock; | ||
Locker locker { lock }; | ||
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size_t signalIndex = static_cast<size_t>(signal); | ||
size_t nextFree = numberOfHandlers[signalIndex]; | ||
RELEASE_ASSERT(nextFree < maxNumberOfHandlers); | ||
SignalHandlerMemory* memory = &handlers[signalIndex][nextFree]; | ||
new (memory) SignalHandler(WTFMove(handler)); | ||
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// We deliberately do not want to increment the count until after we've | ||
// fully initialized the memory. This way, forEachHandler() won't see a | ||
// partially initialized handler. | ||
storeStoreFence(); | ||
numberOfHandlers[signalIndex]++; | ||
loadLoadFence(); | ||
} | ||
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template<typename Func> | ||
inline void SignalHandlers::forEachHandler(Signal signal, const Func& func) const | ||
{ | ||
size_t signalIndex = static_cast<size_t>(signal); | ||
size_t handlerIndex = numberOfHandlers[signalIndex]; | ||
while (handlerIndex--) { | ||
auto* memory = const_cast<SignalHandlerMemory*>(&handlers[signalIndex][handlerIndex]); | ||
const SignalHandler& handler = *bitwise_cast<SignalHandler*>(memory); | ||
func(handler); | ||
} | ||
} | ||
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inline Signal fromSystemException(int signal) | ||
{ | ||
switch (signal) { | ||
case EXCEPTION_FLT_DENORMAL_OPERAND: | ||
case EXCEPTION_FLT_DIVIDE_BY_ZERO: | ||
case EXCEPTION_FLT_INEXACT_RESULT: | ||
case EXCEPTION_FLT_INVALID_OPERATION: | ||
case EXCEPTION_FLT_OVERFLOW: | ||
case EXCEPTION_FLT_STACK_CHECK: | ||
case EXCEPTION_FLT_UNDERFLOW: | ||
return Signal::FloatingPoint; | ||
case EXCEPTION_ILLEGAL_INSTRUCTION: | ||
return Signal::IllegalInstruction; | ||
case EXCEPTION_ACCESS_VIOLATION: | ||
return Signal::AccessFault; | ||
default: | ||
return Signal::Unknown; | ||
} | ||
} | ||
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LONG WINAPI vectoredHandler(struct _EXCEPTION_POINTERS *exceptionInfo) | ||
{ | ||
Signal signal = fromSystemException(exceptionInfo->ExceptionRecord->ExceptionCode); | ||
SignalHandlers& handlers = g_wtfConfig.signalHandlers; | ||
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SigInfo sigInfo; | ||
if (signal == Signal::AccessFault) { | ||
// The second array element specifies the virtual address of the inaccessible data. | ||
// https://learn.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-exception_record | ||
sigInfo.faultingAddress = reinterpret_cast<void*>(exceptionInfo->ExceptionRecord->ExceptionInformation[1]); | ||
} | ||
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PlatformRegisters& registers = *(exceptionInfo->ContextRecord); | ||
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long result = EXCEPTION_EXECUTE_HANDLER; | ||
handlers.forEachHandler(signal, [&] (const SignalHandler& handler) { | ||
switch (handler(signal, sigInfo, registers)) { | ||
case SignalAction::Handled: | ||
result = EXCEPTION_CONTINUE_EXECUTION; | ||
break; | ||
default: | ||
break; | ||
} | ||
}); | ||
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return result; | ||
} | ||
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void addSignalHandler(Signal signal, SignalHandler&& handler) | ||
{ | ||
Config::AssertNotFrozenScope assertScope; | ||
SignalHandlers& handlers = g_wtfConfig.signalHandlers; | ||
ASSERT(signal < Signal::Unknown); | ||
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static std::once_flag initializeOnceFlags[static_cast<size_t>(Signal::NumberOfSignals)]; | ||
std::call_once(initializeOnceFlags[static_cast<size_t>(signal)], [&] { | ||
Config::AssertNotFrozenScope assertScope; | ||
AddVectoredExceptionHandler(1, vectoredHandler); | ||
}); | ||
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handlers.add(signal, WTFMove(handler)); | ||
} | ||
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void activateSignalHandlersFor(Signal signal) | ||
{ | ||
UNUSED_PARAM(signal); | ||
} | ||
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void SignalHandlers::initialize() | ||
{ | ||
// noop | ||
} | ||
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} // namespace WTF | ||
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#endif // OS(WINDOWS) |
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