FTLPatchpointExceptionHandle.cpp [plain text]
#include "config.h"
#include "FTLPatchpointExceptionHandle.h"
#if ENABLE(FTL_JIT)
#include "B3StackmapGenerationParams.h"
#include "FTLExceptionTarget.h"
#include "FTLOSRExit.h"
#include "FTLOSRExitHandle.h"
#include "FTLState.h"
namespace JSC { namespace FTL {
using namespace DFG;
RefPtr<PatchpointExceptionHandle> PatchpointExceptionHandle::create(
State& state, OSRExitDescriptor* descriptor, NodeOrigin origin, unsigned offset,
const HandlerInfo& handler)
{
return adoptRef(new PatchpointExceptionHandle(state, descriptor, origin, offset, handler));
}
RefPtr<PatchpointExceptionHandle> PatchpointExceptionHandle::defaultHandle(State& state)
{
if (!state.defaultExceptionHandle) {
state.defaultExceptionHandle = adoptRef(
new PatchpointExceptionHandle(state, nullptr, NodeOrigin(), 0, HandlerInfo()));
}
return state.defaultExceptionHandle;
}
PatchpointExceptionHandle::~PatchpointExceptionHandle()
{
}
RefPtr<ExceptionTarget> PatchpointExceptionHandle::scheduleExitCreation(
const B3::StackmapGenerationParams& params)
{
if (!m_descriptor) {
bool isDefaultHandler = true;
return adoptRef(
new ExceptionTarget(isDefaultHandler, m_state.exceptionHandler, nullptr));
}
bool isDefaultHandler = false;
return adoptRef(new ExceptionTarget(isDefaultHandler, { }, createHandle(ExceptionCheck, params)));
}
void PatchpointExceptionHandle::scheduleExitCreationForUnwind(
const B3::StackmapGenerationParams& params, CallSiteIndex callSiteIndex)
{
if (!m_descriptor)
return;
RefPtr<OSRExitHandle> handle = createHandle(GenericUnwind, params);
handle->exit.m_exceptionHandlerCallSiteIndex = callSiteIndex;
HandlerInfo handler = m_handler;
params.addLatePath(
[handle, handler, callSiteIndex] (CCallHelpers& jit) {
CodeBlock* codeBlock = jit.codeBlock();
jit.addLinkTask(
[=] (LinkBuffer& linkBuffer) {
HandlerInfo newHandler = handler;
newHandler.start = callSiteIndex.bits();
newHandler.end = callSiteIndex.bits() + 1;
newHandler.nativeCode = linkBuffer.locationOf(handle->label);
codeBlock->appendExceptionHandler(newHandler);
});
});
}
PatchpointExceptionHandle::PatchpointExceptionHandle(
State& state, OSRExitDescriptor* descriptor, NodeOrigin origin, unsigned offset,
const HandlerInfo& handler)
: m_state(state)
, m_descriptor(descriptor)
, m_origin(origin)
, m_offset(offset)
, m_handler(handler)
{
}
RefPtr<OSRExitHandle> PatchpointExceptionHandle::createHandle(
ExitKind kind, const B3::StackmapGenerationParams& params)
{
return m_descriptor->emitOSRExitLater(
m_state, kind, m_origin, params, m_offset);
}
} }
#endif // ENABLE(FTL_JIT)