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//===- xray-extract.cc - XRay Instrumentation Map Extraction --------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Implementation of the xray-extract.h interface.
//
// FIXME: Support other XRay-instrumented binary formats other than ELF.
//
//===----------------------------------------------------------------------===//
#include <type_traits>
#include <utility>
#include "xray-registry.h"
#include "llvm/Object/ELF.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DataExtractor.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/XRay/InstrumentationMap.h"
using namespace llvm;
using namespace llvm::xray;
using namespace llvm::yaml;
// llvm-xray extract
// ----------------------------------------------------------------------------
static cl::SubCommand Extract("extract", "Extract instrumentation maps");
static cl::opt<std::string> ExtractInput(cl::Positional,
cl::desc("<input file>"), cl::Required,
cl::sub(Extract));
static cl::opt<std::string>
ExtractOutput("output", cl::value_desc("output file"), cl::init("-"),
cl::desc("output file; use '-' for stdout"),
cl::sub(Extract));
static cl::alias ExtractOutput2("o", cl::aliasopt(ExtractOutput),
cl::desc("Alias for -output"),
cl::sub(Extract));
namespace {
void exportAsYAML(const InstrumentationMap &Map, raw_ostream &OS) {
// First we translate the sleds into the YAMLXRaySledEntry objects in a deque.
std::vector<YAMLXRaySledEntry> YAMLSleds;
auto Sleds = Map.sleds();
YAMLSleds.reserve(std::distance(Sleds.begin(), Sleds.end()));
for (const auto &Sled : Sleds) {
auto FuncId = Map.getFunctionId(Sled.Function);
if (!FuncId)
return;
YAMLSleds.push_back({*FuncId, Sled.Address, Sled.Function, Sled.Kind,
Sled.AlwaysInstrument});
}
Output Out(OS, nullptr, 0);
Out << YAMLSleds;
}
} // namespace
static CommandRegistration Unused(&Extract, []() -> Error {
auto InstrumentationMapOrError = loadInstrumentationMap(ExtractInput);
if (!InstrumentationMapOrError)
return joinErrors(make_error<StringError>(
Twine("Cannot extract instrumentation map from '") +
ExtractInput + "'.",
std::make_error_code(std::errc::invalid_argument)),
InstrumentationMapOrError.takeError());
std::error_code EC;
raw_fd_ostream OS(ExtractOutput, EC, sys::fs::OpenFlags::F_Text);
if (EC)
return make_error<StringError>(
Twine("Cannot open file '") + ExtractOutput + "' for writing.", EC);
exportAsYAML(*InstrumentationMapOrError, OS);
return Error::success();
});
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