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      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