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
23DILineInfo BTFContext::getLineInfoForAddress(SectionedAddress Address,
24 DILineInfoSpecifier Specifier) {
25 const BTF::BPFLineInfo *LineInfo = BTF.findLineInfo(Address);
26 DILineInfo Result;
27 if (!LineInfo)
28 return Result;
29
30 Result.LineSource = BTF.findString(Offset: LineInfo->LineOff);
31 Result.FileName = BTF.findString(Offset: LineInfo->FileNameOff);
32 Result.Line = LineInfo->getLine();
33 Result.Column = LineInfo->getCol();
34 return Result;
35}
36
37DILineInfo BTFContext::getLineInfoForDataAddress(SectionedAddress Address) {
38 // BTF does not convey such information.
39 return {};
40}
41
42DILineInfoTable
43BTFContext::getLineInfoForAddressRange(SectionedAddress Address, uint64_t Size,
44 DILineInfoSpecifier Specifier) {
45 // This function is used only from llvm-rtdyld utility and a few
46 // JITEventListener implementations. Ignore it for now.
47 return {};
48}
49
50DIInliningInfo
51BTFContext::getInliningInfoForAddress(SectionedAddress Address,
52 DILineInfoSpecifier Specifier) {
53 // BTF does not convey such information
54 return {};
55}
56
57std::vector<DILocal> BTFContext::getLocalsForAddress(SectionedAddress Address) {
58 // BTF does not convey such information
59 return {};
60}
61
62std::unique_ptr<BTFContext>
63BTFContext::create(const ObjectFile &Obj,
64 std::function<void(Error)> ErrorHandler) {
65 auto Ctx = std::make_unique<BTFContext>();
66 BTFParser::ParseOptions Opts;
67 Opts.LoadLines = true;
68 if (Error E = Ctx->BTF.parse(Obj, Opts))
69 ErrorHandler(std::move(E));
70 return Ctx;
71}
72