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//===- lib/DebugInfo/Symbolize/DIPrinter.cpp ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the DIPrinter class, which is responsible for printing
// structures defined in DebugInfo/DIContext.h
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/Symbolize/DIPrinter.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/DebugInfo/DIContext.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <memory>
#include <string>
namespace llvm {
namespace symbolize {
// By default, DILineInfo contains "<invalid>" for function/filename it
// cannot fetch. We replace it to "??" to make our output closer to addr2line.
static const char kDILineInfoBadString[] = "<invalid>";
static const char kBadString[] = "??";
// Prints source code around in the FileName the Line.
void DIPrinter::printContext(const std::string &FileName, int64_t Line) {
if (PrintSourceContext <= 0)
return;
ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr =
MemoryBuffer::getFile(FileName);
if (!BufOrErr)
return;
std::unique_ptr<MemoryBuffer> Buf = std::move(BufOrErr.get());
int64_t FirstLine =
std::max(static_cast<int64_t>(1), Line - PrintSourceContext / 2);
int64_t LastLine = FirstLine + PrintSourceContext;
size_t MaxLineNumberWidth = std::ceil(std::log10(LastLine));
for (line_iterator I = line_iterator(*Buf, false);
!I.is_at_eof() && I.line_number() <= LastLine; ++I) {
int64_t L = I.line_number();
if (L >= FirstLine && L <= LastLine) {
OS << format_decimal(L, MaxLineNumberWidth);
if (L == Line)
OS << " >: ";
else
OS << " : ";
OS << *I << "\n";
}
}
}
void DIPrinter::print(const DILineInfo &Info, bool Inlined) {
if (PrintFunctionNames) {
std::string FunctionName = Info.FunctionName;
if (FunctionName == kDILineInfoBadString)
FunctionName = kBadString;
StringRef Delimiter = PrintPretty ? " at " : "\n";
StringRef Prefix = (PrintPretty && Inlined) ? " (inlined by) " : "";
OS << Prefix << FunctionName << Delimiter;
}
std::string Filename = Info.FileName;
if (Filename == kDILineInfoBadString)
Filename = kBadString;
OS << Filename << ":" << Info.Line << ":" << Info.Column << "\n";
printContext(Filename, Info.Line);
}
DIPrinter &DIPrinter::operator<<(const DILineInfo &Info) {
print(Info, false);
return *this;
}
DIPrinter &DIPrinter::operator<<(const DIInliningInfo &Info) {
uint32_t FramesNum = Info.getNumberOfFrames();
if (FramesNum == 0) {
print(DILineInfo(), false);
return *this;
}
for (uint32_t i = 0; i < FramesNum; i++)
print(Info.getFrame(i), i > 0);
return *this;
}
DIPrinter &DIPrinter::operator<<(const DIGlobal &Global) {
std::string Name = Global.Name;
if (Name == kDILineInfoBadString)
Name = kBadString;
OS << Name << "\n";
OS << Global.Start << " " << Global.Size << "\n";
return *this;
}
} // end namespace symbolize
} // end namespace llvm
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