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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 "LLVMSymbolize.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.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<bool>
ClPrintFunctions("functions", cl::init(true),
cl::desc("Print function names as well as line "
"information for a given address"));
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 bool parseCommand(bool &IsData, std::string &ModuleName,
uint64_t &ModuleOffset) {
const char *kDataCmd = "DATA ";
const char *kCodeCmd = "CODE ";
const int kMaxInputStringLength = 1024;
const char kDelimiters[] = " \n";
char InputString[kMaxInputStringLength];
if (!fgets(InputString, sizeof(InputString), stdin))
return false;
IsData = false;
ModuleName = "";
std::string ModuleOffsetStr = "";
char *pos = InputString;
if (strncmp(pos, kDataCmd, strlen(kDataCmd)) == 0) {
IsData = true;
pos += strlen(kDataCmd);
} else if (strncmp(pos, kCodeCmd, strlen(kCodeCmd)) == 0) {
IsData = false;
pos += strlen(kCodeCmd);
} else {
// If no cmd, assume it's CODE.
IsData = false;
}
// Skip delimiters and parse input filename.
pos += strspn(pos, kDelimiters);
if (*pos == '"' || *pos == '\'') {
char quote = *pos;
pos++;
char *end = strchr(pos, quote);
if (end == 0)
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;
}
// Skip delimiters and parse module offset.
pos += strspn(pos, kDelimiters);
int offset_length = strcspn(pos, kDelimiters);
ModuleOffsetStr = std::string(pos, offset_length);
if (StringRef(ModuleOffsetStr).getAsInteger(0, ModuleOffset))
return false;
return true;
}
int main(int argc, char **argv) {
// Print stack trace if we signal out.
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "llvm symbolizer for compiler-rt\n");
LLVMSymbolizer::Options Opts(ClUseSymbolTable, ClPrintFunctions,
ClPrintInlining, ClDemangle);
LLVMSymbolizer Symbolizer(Opts);
bool IsData = false;
std::string ModuleName;
uint64_t ModuleOffset;
while (parseCommand(IsData, ModuleName, ModuleOffset)) {
std::string Result =
IsData ? Symbolizer.symbolizeData(ModuleName, ModuleOffset)
: Symbolizer.symbolizeCode(ModuleName, ModuleOffset);
outs() << Result << "\n";
outs().flush();
}
return 0;
}
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