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//===---- EPCGenericJITLinkMemoryManager.cpp -- Mem management via EPC ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/EPCGenericJITLinkMemoryManager.h"
#include "llvm/ExecutionEngine/JITLink/JITLink.h"
#include "llvm/ExecutionEngine/Orc/LookupAndRecordAddrs.h"
#include "llvm/ExecutionEngine/Orc/Shared/OrcRTBridge.h"
#include <limits>
using namespace llvm::jitlink;
namespace llvm {
namespace orc {
class EPCGenericJITLinkMemoryManager::InFlightAlloc
: public jitlink::JITLinkMemoryManager::InFlightAlloc {
public:
// FIXME: The C++98 initializer is an attempt to work around compile failures
// due to http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1397.
// We should be able to switch this back to member initialization once that
// issue is fixed.
struct SegInfo {
SegInfo() : WorkingMem(nullptr), ContentSize(0), ZeroFillSize(0) {}
char *WorkingMem;
ExecutorAddr Addr;
uint64_t ContentSize;
uint64_t ZeroFillSize;
};
using SegInfoMap = AllocGroupSmallMap<SegInfo>;
InFlightAlloc(EPCGenericJITLinkMemoryManager &Parent, LinkGraph &G,
ExecutorAddr AllocAddr, SegInfoMap Segs)
: Parent(Parent), G(G), AllocAddr(AllocAddr), Segs(std::move(Segs)) {}
void finalize(OnFinalizedFunction OnFinalize) override {
tpctypes::FinalizeRequest FR;
for (auto &KV : Segs) {
assert(KV.second.ContentSize <= std::numeric_limits<size_t>::max());
FR.Segments.push_back(tpctypes::SegFinalizeRequest{
tpctypes::toWireProtectionFlags(
toSysMemoryProtectionFlags(KV.first.getMemProt())),
KV.second.Addr,
alignTo(KV.second.ContentSize + KV.second.ZeroFillSize,
Parent.EPC.getPageSize()),
{KV.second.WorkingMem, static_cast<size_t>(KV.second.ContentSize)}});
}
// Transfer allocation actions.
std::swap(FR.Actions, G.allocActions());
Parent.EPC.callSPSWrapperAsync<
rt::SPSSimpleExecutorMemoryManagerFinalizeSignature>(
Parent.SAs.Finalize,
[OnFinalize = std::move(OnFinalize), AllocAddr = this->AllocAddr](
Error SerializationErr, Error FinalizeErr) mutable {
// FIXME: Release abandoned alloc.
if (SerializationErr) {
cantFail(std::move(FinalizeErr));
OnFinalize(std::move(SerializationErr));
} else if (FinalizeErr)
OnFinalize(std::move(FinalizeErr));
else
OnFinalize(FinalizedAlloc(AllocAddr));
},
Parent.SAs.Allocator, std::move(FR));
}
void abandon(OnAbandonedFunction OnAbandoned) override {
// FIXME: Return memory to pool instead.
Parent.EPC.callSPSWrapperAsync<
rt::SPSSimpleExecutorMemoryManagerDeallocateSignature>(
Parent.SAs.Deallocate,
[OnAbandoned = std::move(OnAbandoned)](Error SerializationErr,
Error DeallocateErr) mutable {
if (SerializationErr) {
cantFail(std::move(DeallocateErr));
OnAbandoned(std::move(SerializationErr));
} else
OnAbandoned(std::move(DeallocateErr));
},
Parent.SAs.Allocator, ArrayRef<ExecutorAddr>(AllocAddr));
}
private:
EPCGenericJITLinkMemoryManager &Parent;
LinkGraph &G;
ExecutorAddr AllocAddr;
SegInfoMap Segs;
};
void EPCGenericJITLinkMemoryManager::allocate(const JITLinkDylib *JD,
LinkGraph &G,
OnAllocatedFunction OnAllocated) {
BasicLayout BL(G);
auto Pages = BL.getContiguousPageBasedLayoutSizes(EPC.getPageSize());
if (!Pages)
return OnAllocated(Pages.takeError());
EPC.callSPSWrapperAsync<rt::SPSSimpleExecutorMemoryManagerReserveSignature>(
SAs.Reserve,
[this, BL = std::move(BL), OnAllocated = std::move(OnAllocated)](
Error SerializationErr, Expected<ExecutorAddr> AllocAddr) mutable {
if (SerializationErr) {
cantFail(AllocAddr.takeError());
return OnAllocated(std::move(SerializationErr));
}
if (!AllocAddr)
return OnAllocated(AllocAddr.takeError());
completeAllocation(*AllocAddr, std::move(BL), std::move(OnAllocated));
},
SAs.Allocator, Pages->total());
}
void EPCGenericJITLinkMemoryManager::deallocate(
std::vector<FinalizedAlloc> Allocs, OnDeallocatedFunction OnDeallocated) {
EPC.callSPSWrapperAsync<
rt::SPSSimpleExecutorMemoryManagerDeallocateSignature>(
SAs.Deallocate,
[OnDeallocated = std::move(OnDeallocated)](Error SerErr,
Error DeallocErr) mutable {
if (SerErr) {
cantFail(std::move(DeallocErr));
OnDeallocated(std::move(SerErr));
} else
OnDeallocated(std::move(DeallocErr));
},
SAs.Allocator, Allocs);
for (auto &A : Allocs)
A.release();
}
void EPCGenericJITLinkMemoryManager::completeAllocation(
ExecutorAddr AllocAddr, BasicLayout BL, OnAllocatedFunction OnAllocated) {
InFlightAlloc::SegInfoMap SegInfos;
ExecutorAddr NextSegAddr = AllocAddr;
for (auto &KV : BL.segments()) {
const auto &AG = KV.first;
auto &Seg = KV.second;
Seg.Addr = NextSegAddr;
KV.second.WorkingMem = BL.getGraph().allocateBuffer(Seg.ContentSize).data();
NextSegAddr += ExecutorAddrDiff(
alignTo(Seg.ContentSize + Seg.ZeroFillSize, EPC.getPageSize()));
auto &SegInfo = SegInfos[AG];
SegInfo.ContentSize = Seg.ContentSize;
SegInfo.ZeroFillSize = Seg.ZeroFillSize;
SegInfo.Addr = ExecutorAddr(Seg.Addr);
SegInfo.WorkingMem = Seg.WorkingMem;
}
if (auto Err = BL.apply())
return OnAllocated(std::move(Err));
OnAllocated(std::make_unique<InFlightAlloc>(*this, BL.getGraph(), AllocAddr,
std::move(SegInfos)));
}
} // end namespace orc
} // end namespace llvm
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