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
getLineInfoForAddress(SectionedAddress Address,DILineInfoSpecifier Specifier)23 DILineInfo 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(LineInfo->LineOff);
31 Result.FileName = BTF.findString(LineInfo->FileNameOff);
32 Result.Line = LineInfo->getLine();
33 Result.Column = LineInfo->getCol();
34 return Result;
35 }
36
getLineInfoForDataAddress(SectionedAddress Address)37 DILineInfo BTFContext::getLineInfoForDataAddress(SectionedAddress Address) {
38 // BTF does not convey such information.
39 return {};
40 }
41
42 DILineInfoTable
getLineInfoForAddressRange(SectionedAddress Address,uint64_t Size,DILineInfoSpecifier Specifier)43 BTFContext::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
50 DIInliningInfo
getInliningInfoForAddress(SectionedAddress Address,DILineInfoSpecifier Specifier)51 BTFContext::getInliningInfoForAddress(SectionedAddress Address,
52 DILineInfoSpecifier Specifier) {
53 // BTF does not convey such information
54 return {};
55 }
56
getLocalsForAddress(SectionedAddress Address)57 std::vector<DILocal> BTFContext::getLocalsForAddress(SectionedAddress Address) {
58 // BTF does not convey such information
59 return {};
60 }
61
62 std::unique_ptr<BTFContext>
create(const ObjectFile & Obj,std::function<void (Error)> ErrorHandler)63 BTFContext::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