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//===------------- JITLink.cpp - Core Run-time JIT linker APIs ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/JITLink/JITLink.h"
#include "llvm/BinaryFormat/Magic.h"
#include "llvm/ExecutionEngine/JITLink/MachO.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
using namespace llvm::object;
#define DEBUG_TYPE "jitlink"
namespace {
enum JITLinkErrorCode { GenericJITLinkError = 1 };
// FIXME: This class is only here to support the transition to llvm::Error. It
// will be removed once this transition is complete. Clients should prefer to
// deal with the Error value directly, rather than converting to error_code.
class JITLinkerErrorCategory : public std::error_category {
public:
const char *name() const noexcept override { return "runtimedyld"; }
std::string message(int Condition) const override {
switch (static_cast<JITLinkErrorCode>(Condition)) {
case GenericJITLinkError:
return "Generic JITLink error";
}
llvm_unreachable("Unrecognized JITLinkErrorCode");
}
};
static ManagedStatic<JITLinkerErrorCategory> JITLinkerErrorCategory;
} // namespace
namespace llvm {
namespace jitlink {
char JITLinkError::ID = 0;
void JITLinkError::log(raw_ostream &OS) const { OS << ErrMsg << "\n"; }
std::error_code JITLinkError::convertToErrorCode() const {
return std::error_code(GenericJITLinkError, *JITLinkerErrorCategory);
}
const StringRef getGenericEdgeKindName(Edge::Kind K) {
switch (K) {
case Edge::Invalid:
return "INVALID RELOCATION";
case Edge::KeepAlive:
return "Keep-Alive";
case Edge::LayoutNext:
return "Layout-Next";
default:
llvm_unreachable("Unrecognized relocation kind");
}
}
raw_ostream &operator<<(raw_ostream &OS, const Atom &A) {
OS << "<";
if (A.getName().empty())
OS << "anon@" << format("0x%016" PRIx64, A.getAddress());
else
OS << A.getName();
OS << " [";
if (A.isDefined()) {
auto &DA = static_cast<const DefinedAtom &>(A);
OS << " section=" << DA.getSection().getName();
if (DA.isLive())
OS << " live";
if (DA.shouldDiscard())
OS << " should-discard";
} else
OS << " external";
OS << " ]>";
return OS;
}
void printEdge(raw_ostream &OS, const Atom &FixupAtom, const Edge &E,
StringRef EdgeKindName) {
OS << "edge@" << formatv("{0:x16}", FixupAtom.getAddress() + E.getOffset())
<< ": " << FixupAtom << " + " << E.getOffset() << " -- " << EdgeKindName
<< " -> " << E.getTarget() << " + " << E.getAddend();
}
Section::~Section() {
for (auto *DA : DefinedAtoms)
DA->~DefinedAtom();
}
void AtomGraph::dump(raw_ostream &OS,
std::function<StringRef(Edge::Kind)> EdgeKindToName) {
if (!EdgeKindToName)
EdgeKindToName = [](Edge::Kind K) { return StringRef(); };
OS << "Defined atoms:\n";
for (auto *DA : defined_atoms()) {
OS << " " << format("0x%016" PRIx64, DA->getAddress()) << ": " << *DA
<< "\n";
for (auto &E : DA->edges()) {
OS << " ";
StringRef EdgeName = (E.getKind() < Edge::FirstRelocation
? getGenericEdgeKindName(E.getKind())
: EdgeKindToName(E.getKind()));
if (!EdgeName.empty())
printEdge(OS, *DA, E, EdgeName);
else {
auto EdgeNumberString = std::to_string(E.getKind());
printEdge(OS, *DA, E, EdgeNumberString);
}
OS << "\n";
}
}
OS << "Absolute atoms:\n";
for (auto *A : absolute_atoms())
OS << " " << format("0x%016" PRIx64, A->getAddress()) << ": " << *A
<< "\n";
OS << "External atoms:\n";
for (auto *A : external_atoms())
OS << " " << format("0x%016" PRIx64, A->getAddress()) << ": " << *A
<< "\n";
}
JITLinkContext::~JITLinkContext() {}
bool JITLinkContext::shouldAddDefaultTargetPasses(const Triple &TT) const {
return true;
}
AtomGraphPassFunction JITLinkContext::getMarkLivePass(const Triple &TT) const {
return AtomGraphPassFunction();
}
Error JITLinkContext::modifyPassConfig(const Triple &TT,
PassConfiguration &Config) {
return Error::success();
}
Error markAllAtomsLive(AtomGraph &G) {
for (auto *DA : G.defined_atoms())
DA->setLive(true);
return Error::success();
}
void jitLink(std::unique_ptr<JITLinkContext> Ctx) {
auto Magic = identify_magic(Ctx->getObjectBuffer().getBuffer());
switch (Magic) {
case file_magic::macho_object:
return jitLink_MachO(std::move(Ctx));
default:
Ctx->notifyFailed(make_error<JITLinkError>("Unsupported file format"));
};
}
} // end namespace jitlink
} // end namespace llvm
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