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ee48a509e2
Summary: Processing 2 GB XRay traces with "llvm-xray convert -symbolize" needs to go over each trace record and symbolize the function name refered to by its ID. Currently this happens by asking the LLVM symbolizer code every single time. A simple cache can save around 30 minutes of processing of that trace. llvm-xray's resident memory usage increased negligibly with this cache. Reviewers: dberris Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D43896 llvm-svn: 326407
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
//===- xray-fc-account.cc - XRay Function Call Accounting Tool ------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implementation of the helper tools dealing with XRay-generated function ids.
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//
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//===----------------------------------------------------------------------===//
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#include "func-id-helper.h"
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#include "llvm/Support/Path.h"
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#include <sstream>
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using namespace llvm;
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using namespace xray;
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std::string FuncIdConversionHelper::SymbolOrNumber(int32_t FuncId) const {
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auto CacheIt = CachedNames.find(FuncId);
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if (CacheIt != CachedNames.end())
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return CacheIt->second;
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std::ostringstream F;
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auto It = FunctionAddresses.find(FuncId);
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if (It == FunctionAddresses.end()) {
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F << "#" << FuncId;
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return F.str();
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}
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if (auto ResOrErr = Symbolizer.symbolizeCode(BinaryInstrMap, It->second)) {
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auto &DI = *ResOrErr;
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if (DI.FunctionName == "<invalid>")
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F << "@(" << std::hex << It->second << ")";
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else
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F << DI.FunctionName;
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} else
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handleAllErrors(ResOrErr.takeError(), [&](const ErrorInfoBase &) {
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F << "@(" << std::hex << It->second << ")";
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});
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auto S = F.str();
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CachedNames[FuncId] = S;
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return S;
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}
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std::string FuncIdConversionHelper::FileLineAndColumn(int32_t FuncId) const {
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auto It = FunctionAddresses.find(FuncId);
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if (It == FunctionAddresses.end())
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return "(unknown)";
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std::ostringstream F;
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auto ResOrErr = Symbolizer.symbolizeCode(BinaryInstrMap, It->second);
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if (!ResOrErr) {
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consumeError(ResOrErr.takeError());
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return "(unknown)";
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}
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auto &DI = *ResOrErr;
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F << sys::path::filename(DI.FileName).str() << ":" << DI.Line << ":"
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<< DI.Column;
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return F.str();
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}
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