1 //===- BTFContext.cpp ---------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Implementation of the BTFContext interface, this is used by 10 // llvm-objdump tool to print source code alongside disassembly. 11 // In fact, currently it is a simple wrapper for BTFParser instance. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "llvm/DebugInfo/BTF/BTFContext.h" 16 17 #define DEBUG_TYPE "debug-info-btf-context" 18 19 using namespace llvm; 20 using object::ObjectFile; 21 using object::SectionedAddress; 22 23 std::optional<DILineInfo> 24 BTFContext::getLineInfoForAddress(SectionedAddress Address, 25 DILineInfoSpecifier Specifier) { 26 const BTF::BPFLineInfo *LineInfo = BTF.findLineInfo(Address); 27 DILineInfo Result; 28 if (!LineInfo) 29 return std::nullopt; 30 31 Result.LineSource = BTF.findString(LineInfo->LineOff); 32 Result.FileName = BTF.findString(LineInfo->FileNameOff); 33 Result.Line = LineInfo->getLine(); 34 Result.Column = LineInfo->getCol(); 35 return Result; 36 } 37 38 std::optional<DILineInfo> 39 BTFContext::getLineInfoForDataAddress(SectionedAddress Address) { 40 // BTF does not convey such information. 41 return std::nullopt; 42 } 43 44 DILineInfoTable 45 BTFContext::getLineInfoForAddressRange(SectionedAddress Address, uint64_t Size, 46 DILineInfoSpecifier Specifier) { 47 // This function is used only from llvm-rtdyld utility and a few 48 // JITEventListener implementations. Ignore it for now. 49 return {}; 50 } 51 52 DIInliningInfo 53 BTFContext::getInliningInfoForAddress(SectionedAddress Address, 54 DILineInfoSpecifier Specifier) { 55 // BTF does not convey such information 56 return {}; 57 } 58 59 std::vector<DILocal> BTFContext::getLocalsForAddress(SectionedAddress Address) { 60 // BTF does not convey such information 61 return {}; 62 } 63 64 std::unique_ptr<BTFContext> 65 BTFContext::create(const ObjectFile &Obj, 66 std::function<void(Error)> ErrorHandler) { 67 auto Ctx = std::make_unique<BTFContext>(); 68 BTFParser::ParseOptions Opts; 69 Opts.LoadLines = true; 70 if (Error E = Ctx->BTF.parse(Obj, Opts)) 71 ErrorHandler(std::move(E)); 72 return Ctx; 73 } 74