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//===-- llvm-symbolizer.cpp - Simple addr2line-like symbolizer ------------===//
// The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// This utility works much like "addr2line". It is able of transforming
// tuples (module name, module offset) to code locations (function name,
// file, line number, column number). It is targeted for compiler-rt tools
// (especially AddressSanitizer and ThreadSanitizer) that can use it
// to symbolize stack traces in their error reports.
#include "llvm/ADT/StringRef.h"
#include "llvm/DebugInfo/Symbolize/DIPrinter.h"
#include "llvm/DebugInfo/Symbolize/Symbolize.h"
#include "llvm/Support/COM.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdio>
#include <cstring>
#include <string>
using namespace llvm;
using namespace symbolize;
static cl::opt<bool>
ClUseSymbolTable("use-symbol-table", cl::init(true),
cl::desc("Prefer names in symbol table to names "
"in debug info"));
static cl::opt<FunctionNameKind> ClPrintFunctions(
"functions", cl::init(FunctionNameKind::LinkageName),
cl::desc("Print function name for a given address:"),
cl::values(clEnumValN(FunctionNameKind::None, "none", "omit function name"),
clEnumValN(FunctionNameKind::ShortName, "short",
"print short function name"),
clEnumValN(FunctionNameKind::LinkageName, "linkage",
"print function linkage name")));
static cl::opt<bool>
ClUseRelativeAddress("relative-address", cl::init(false),
cl::desc("Interpret addresses as relative addresses"),
static cl::opt<bool>
ClPrintInlining("inlining", cl::init(true),
cl::desc("Print all inlined frames for a given address"));
static cl::opt<bool>
ClDemangle("demangle", cl::init(true), cl::desc("Demangle function names"));
static cl::opt<std::string> ClDefaultArch("default-arch", cl::init(""),
cl::desc("Default architecture "
"(for multi-arch objects)"));
static cl::opt<std::string>
ClBinaryName("obj", cl::init(""),
cl::desc("Path to object file to be symbolized (if not provided, "
"object file should be specified for each input line)"));
static cl::opt<std::string>
ClDwpName("dwp", cl::init(""),
cl::desc("Path to DWP file to be use for any split CUs"));
static cl::list<std::string>
ClDsymHint("dsym-hint", cl::ZeroOrMore,
cl::desc("Path to .dSYM bundles to search for debug info for the "
"object files"));
static cl::opt<bool>
ClPrintAddress("print-address", cl::init(false),
cl::desc("Show address before line information"));
static cl::opt<bool>
ClPrettyPrint("pretty-print", cl::init(false),
cl::desc("Make the output more human friendly"));
static cl::opt<int> ClPrintSourceContextLines(
"print-source-context-lines", cl::init(0),
cl::desc("Print N number of source file context"));
static cl::opt<bool> ClVerbose("verbose", cl::init(false),
cl::desc("Print verbose line info"));
template<typename T>
static bool error(Expected<T> &ResOrErr) {
if (ResOrErr)
return false;
logAllUnhandledErrors(ResOrErr.takeError(), errs(),
"LLVMSymbolizer: error reading file: ");
return true;
static bool parseCommand(StringRef InputString, bool &IsData,
std::string &ModuleName, uint64_t &ModuleOffset) {
const char kDelimiters[] = " \n\r";
ModuleName = "";
if (InputString.consume_front("CODE ")) {
IsData = false;
} else if (InputString.consume_front("DATA ")) {
IsData = true;
} else {
// If no cmd, assume it's CODE.
IsData = false;
const char *pos =;
// Skip delimiters and parse input filename (if needed).
if (ClBinaryName.empty()) {
pos += strspn(pos, kDelimiters);
if (*pos == '"' || *pos == '\'') {
char quote = *pos;
const char *end = strchr(pos, quote);
if (!end)
return false;
ModuleName = std::string(pos, end - pos);
pos = end + 1;
} else {
int name_length = strcspn(pos, kDelimiters);
ModuleName = std::string(pos, name_length);
pos += name_length;
} else {
ModuleName = ClBinaryName;
// Skip delimiters and parse module offset.
pos += strspn(pos, kDelimiters);
int offset_length = strcspn(pos, kDelimiters);
return !StringRef(pos, offset_length).getAsInteger(0, ModuleOffset);
int main(int argc, char **argv) {
InitLLVM X(argc, argv);
llvm::sys::InitializeCOMRAII COM(llvm::sys::COMThreadingMode::MultiThreaded);
cl::ParseCommandLineOptions(argc, argv, "llvm-symbolizer\n");
LLVMSymbolizer::Options Opts(ClPrintFunctions, ClUseSymbolTable, ClDemangle,
ClUseRelativeAddress, ClDefaultArch);
for (const auto &hint : ClDsymHint) {
if (sys::path::extension(hint) == ".dSYM") {
} else {
errs() << "Warning: invalid dSYM hint: \"" << hint <<
"\" (must have the '.dSYM' extension).\n";
LLVMSymbolizer Symbolizer(Opts);
DIPrinter Printer(outs(), ClPrintFunctions != FunctionNameKind::None,
ClPrettyPrint, ClPrintSourceContextLines, ClVerbose);
const int kMaxInputStringLength = 1024;
char InputString[kMaxInputStringLength];
while (true) {
if (!fgets(InputString, sizeof(InputString), stdin))
bool IsData = false;
std::string ModuleName;
uint64_t ModuleOffset = 0;
if (!parseCommand(StringRef(InputString), IsData, ModuleName,
ModuleOffset)) {
outs() << InputString;
if (ClPrintAddress) {
outs() << "0x";
StringRef Delimiter = ClPrettyPrint ? ": " : "\n";
outs() << Delimiter;
if (IsData) {
auto ResOrErr = Symbolizer.symbolizeData(ModuleName, ModuleOffset);
Printer << (error(ResOrErr) ? DIGlobal() : ResOrErr.get());
} else if (ClPrintInlining) {
auto ResOrErr =
Symbolizer.symbolizeInlinedCode(ModuleName, ModuleOffset, ClDwpName);
Printer << (error(ResOrErr) ? DIInliningInfo()
: ResOrErr.get());
} else {
auto ResOrErr =
Symbolizer.symbolizeCode(ModuleName, ModuleOffset, ClDwpName);
Printer << (error(ResOrErr) ? DILineInfo() : ResOrErr.get());
outs() << "\n";
return 0;