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//===- BTFContext.cpp ---------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Implementation of the BTFContext interface, this is used by
// llvm-objdump tool to print source code alongside disassembly.
// In fact, currently it is a simple wrapper for BTFParser instance.
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/BTF/BTFContext.h"
#define DEBUG_TYPE "debug-info-btf-context"
using namespace llvm;
using object::ObjectFile;
using object::SectionedAddress;
std::optional<DILineInfo>
BTFContext::getLineInfoForAddress(SectionedAddress Address,
DILineInfoSpecifier Specifier) {
const BTF::BPFLineInfo *LineInfo = BTF.findLineInfo(Address);
DILineInfo Result;
if (!LineInfo)
return std::nullopt;
Result.LineSource = BTF.findString(LineInfo->LineOff);
Result.FileName = BTF.findString(LineInfo->FileNameOff);
Result.Line = LineInfo->getLine();
Result.Column = LineInfo->getCol();
return Result;
}
std::optional<DILineInfo>
BTFContext::getLineInfoForDataAddress(SectionedAddress Address) {
// BTF does not convey such information.
return std::nullopt;
}
DILineInfoTable
BTFContext::getLineInfoForAddressRange(SectionedAddress Address, uint64_t Size,
DILineInfoSpecifier Specifier) {
// This function is used only from llvm-rtdyld utility and a few
// JITEventListener implementations. Ignore it for now.
return {};
}
DIInliningInfo
BTFContext::getInliningInfoForAddress(SectionedAddress Address,
DILineInfoSpecifier Specifier) {
// BTF does not convey such information
return {};
}
std::vector<DILocal> BTFContext::getLocalsForAddress(SectionedAddress Address) {
// BTF does not convey such information
return {};
}
std::unique_ptr<BTFContext>
BTFContext::create(const ObjectFile &Obj,
std::function<void(Error)> ErrorHandler) {
auto Ctx = std::make_unique<BTFContext>();
BTFParser::ParseOptions Opts;
Opts.LoadLines = true;
if (Error E = Ctx->BTF.parse(Obj, Opts))
ErrorHandler(std::move(E));
return Ctx;
}
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