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
19using namespace llvm;
20using object::ObjectFile;
21using object::SectionedAddress;
22
23std::optional<DILineInfo>
24BTFContext::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(Offset: LineInfo->LineOff);
32 Result.FileName = BTF.findString(Offset: LineInfo->FileNameOff);
33 Result.Line = LineInfo->getLine();
34 Result.Column = LineInfo->getCol();
35 return Result;
36}
37
38std::optional<DILineInfo>
39BTFContext::getLineInfoForDataAddress(SectionedAddress Address) {
40 // BTF does not convey such information.
41 return std::nullopt;
42}
43
44DILineInfoTable
45BTFContext::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
52DIInliningInfo
53BTFContext::getInliningInfoForAddress(SectionedAddress Address,
54 DILineInfoSpecifier Specifier) {
55 // BTF does not convey such information
56 return {};
57}
58
59std::vector<DILocal> BTFContext::getLocalsForAddress(SectionedAddress Address) {
60 // BTF does not convey such information
61 return {};
62}
63
64std::unique_ptr<BTFContext>
65BTFContext::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