1 //===- xray-fc-account.cpp: XRay Function Call Accounting Tool ------------===//
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 helper tools dealing with XRay-generated function ids.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "func-id-helper.h"
14 #include "llvm/Support/Path.h"
15 #include <sstream>
16 
17 using namespace llvm;
18 using namespace xray;
19 
20 std::string FuncIdConversionHelper::SymbolOrNumber(int32_t FuncId) const {
21   auto CacheIt = CachedNames.find(FuncId);
22   if (CacheIt != CachedNames.end())
23     return CacheIt->second;
24 
25   std::ostringstream F;
26   auto It = FunctionAddresses.find(FuncId);
27   if (It == FunctionAddresses.end()) {
28     F << "#" << FuncId;
29     return F.str();
30   }
31 
32   object::SectionedAddress ModuleAddress;
33   ModuleAddress.Address = It->second;
34   // TODO: set proper section index here.
35   // object::SectionedAddress::UndefSection works for only absolute addresses.
36   ModuleAddress.SectionIndex = object::SectionedAddress::UndefSection;
37   if (auto ResOrErr = Symbolizer.symbolizeCode(BinaryInstrMap, ModuleAddress)) {
38     auto &DI = *ResOrErr;
39     if (DI.FunctionName == DILineInfo::BadString)
40       F << "@(" << std::hex << It->second << ")";
41     else
42       F << DI.FunctionName;
43   } else
44     handleAllErrors(ResOrErr.takeError(), [&](const ErrorInfoBase &) {
45       F << "@(" << std::hex << It->second << ")";
46     });
47 
48   auto S = F.str();
49   CachedNames[FuncId] = S;
50   return S;
51 }
52 
53 std::string FuncIdConversionHelper::FileLineAndColumn(int32_t FuncId) const {
54   auto It = FunctionAddresses.find(FuncId);
55   if (It == FunctionAddresses.end())
56     return "(unknown)";
57 
58   std::ostringstream F;
59   object::SectionedAddress ModuleAddress;
60   ModuleAddress.Address = It->second;
61   // TODO: set proper section index here.
62   // object::SectionedAddress::UndefSection works for only absolute addresses.
63   ModuleAddress.SectionIndex = object::SectionedAddress::UndefSection;
64   auto ResOrErr = Symbolizer.symbolizeCode(BinaryInstrMap, ModuleAddress);
65   if (!ResOrErr) {
66     consumeError(ResOrErr.takeError());
67     return "(unknown)";
68   }
69 
70   auto &DI = *ResOrErr;
71   F << sys::path::filename(DI.FileName).str() << ":" << DI.Line << ":"
72     << DI.Column;
73 
74   return F.str();
75 }
76