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5d0ac84a37
This is useful for understanding how our demangler processes back references and for investigating issues related to back references. But it's a feature only useful for debugging the demangling process itself, so I'm marking it hidden. llvm-svn: 338609
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
//===-- llvm-undname.cpp - Microsoft ABI name undecorator
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//------------------===//
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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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// This utility works like the windows undname utility. It converts mangled
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// Microsoft symbol names into pretty C/C++ human-readable names.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Demangle/Demangle.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstdio>
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#include <cstring>
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#include <iostream>
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#include <string>
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using namespace llvm;
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cl::opt<bool> DumpBackReferences("backrefs", cl::Optional,
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cl::desc("dump backreferences"), cl::Hidden,
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cl::init(false));
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cl::list<std::string> Symbols(cl::Positional, cl::desc("<input symbols>"),
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cl::ZeroOrMore);
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static void demangle(const std::string &S) {
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int Status;
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MSDemangleFlags Flags = MSDF_None;
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if (DumpBackReferences)
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Flags = MSDemangleFlags(Flags | MSDF_DumpBackrefs);
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char *ResultBuf =
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microsoftDemangle(S.c_str(), nullptr, nullptr, &Status, Flags);
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if (Status == llvm::demangle_success) {
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outs() << ResultBuf << "\n";
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outs().flush();
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} else {
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errs() << "Error: Invalid mangled name\n";
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}
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std::free(ResultBuf);
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}
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int main(int argc, char **argv) {
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InitLLVM X(argc, argv);
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cl::ParseCommandLineOptions(argc, argv, "llvm-undname\n");
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if (Symbols.empty()) {
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while (true) {
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std::string LineStr;
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std::getline(std::cin, LineStr);
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if (std::cin.eof())
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break;
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StringRef Line(LineStr);
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Line = Line.trim();
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if (Line.empty() || Line.startswith("#") || Line.startswith(";"))
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continue;
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// If the user is manually typing in these decorated names, don't echo
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// them to the terminal a second time. If they're coming from redirected
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// input, however, then we should display the input line so that the
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// mangled and demangled name can be easily correlated in the output.
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if (!sys::Process::StandardInIsUserInput()) {
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outs() << Line << "\n";
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outs().flush();
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}
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demangle(Line);
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outs() << "\n";
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}
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} else {
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for (StringRef S : Symbols) {
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outs() << S << "\n";
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outs().flush();
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demangle(S);
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outs() << "\n";
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}
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}
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return 0;
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}
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