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llvm-cxxfilt: support `-t` to demangle types 

By default c++filt demangles functions, though you can optionally pass
`-t` to have it decode types as well, behaving nearly identical to
`__cxa_demangle`.  Add support for this mode.

llvm-svn: 292576
This commit is contained in:
Saleem Abdulrasool 2017-01-20 04:25:26 +00:00
parent 24553c5e55
commit a63fd043fd
2 changed files with 23 additions and 5 deletions
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5
llvm/test/tools/llvm-cxxfilt/types.test Normal file
View File

@ -0,0 +1,5 @@
RUN: llvm-cxxfilt -t f i | FileCheck %s
CHECK: float
CHECK-NEXT: int

23
llvm/tools/llvm-cxxfilt/llvm-cxxfilt.cpp
View File

@ -8,29 +8,42 @@
//===----------------------------------------------------------------------===//
#include "llvm/Demangle/Demangle.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdlib>
#include <iostream>
using namespace llvm;
static cl::opt<bool>
Types("types",
cl::desc("attempt to demangle types as well as function names"),
cl::init(false));
static cl::alias TypesShort("t", cl::desc("alias for --types"),
cl::aliasopt(Types));
static cl::list<std::string>
Decorated(cl::Positional, cl::desc("<mangled>"), cl::ZeroOrMore);
static void demangle(llvm::raw_ostream &OS, const std::string &Mangled) {
int Status;
char *Demangled = nullptr;
if ((Mangled.size() >= 2 && Mangled.compare(0, 2, "_Z")) ||
(Mangled.size() >= 4 && Mangled.compare(0, 4, "___Z")))
if (Types || ((Mangled.size() >= 2 && Mangled.compare(0, 2, "_Z")) ||
(Mangled.size() >= 4 && Mangled.compare(0, 4, "___Z"))))
Demangled = itaniumDemangle(Mangled.c_str(), nullptr, nullptr, &Status);
OS << (Demangled ? Demangled : Mangled) << '\n';
free(Demangled);
}
int main(int argc, char **argv) {
if (argc == 1)
cl::ParseCommandLineOptions(argc, argv, "llvm symbol table dumper\n");
if (Decorated.empty())
for (std::string Mangled; std::getline(std::cin, Mangled);)
demangle(llvm::outs(), Mangled);
else
for (int I = 1; I < argc; ++I)
demangle(llvm::outs(), argv[I]);
for (const auto &Symbol : Decorated)
demangle(llvm::outs(), Symbol);
return EXIT_SUCCESS;
}