1 //===-- llvm-symbolizer.cpp - Simple addr2line-like symbolizer ------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This utility works much like "addr2line". It is able of transforming 11 // tuples (module name, module offset) to code locations (function name, 12 // file, line number, column number). It is targeted for compiler-rt tools 13 // (especially AddressSanitizer and ThreadSanitizer) that can use it 14 // to symbolize stack traces in their error reports. 15 // 16 //===----------------------------------------------------------------------===// 17 18 #include "LLVMSymbolize.h" 19 #include "llvm/ADT/StringRef.h" 20 #include "llvm/Support/CommandLine.h" 21 #include "llvm/Support/Debug.h" 22 #include "llvm/Support/ManagedStatic.h" 23 #include "llvm/Support/PrettyStackTrace.h" 24 #include "llvm/Support/Signals.h" 25 #include "llvm/Support/raw_ostream.h" 26 #include <cstdio> 27 #include <cstring> 28 #include <string> 29 30 using namespace llvm; 31 using namespace symbolize; 32 33 static cl::opt<bool> 34 ClUseSymbolTable("use-symbol-table", cl::init(true), 35 cl::desc("Prefer names in symbol table to names " 36 "in debug info")); 37 38 static cl::opt<bool> 39 ClPrintFunctions("functions", cl::init(true), 40 cl::desc("Print function names as well as line " 41 "information for a given address")); 42 43 static cl::opt<bool> 44 ClPrintInlining("inlining", cl::init(true), 45 cl::desc("Print all inlined frames for a given address")); 46 47 static cl::opt<bool> 48 ClDemangle("demangle", cl::init(true), cl::desc("Demangle function names")); 49 50 static bool parseCommand(bool &IsData, std::string &ModuleName, 51 uint64_t &ModuleOffset) { 52 const char *kDataCmd = "DATA "; 53 const char *kCodeCmd = "CODE "; 54 const int kMaxInputStringLength = 1024; 55 const char kDelimiters[] = " \n"; 56 char InputString[kMaxInputStringLength]; 57 if (!fgets(InputString, sizeof(InputString), stdin)) 58 return false; 59 IsData = false; 60 ModuleName = ""; 61 std::string ModuleOffsetStr = ""; 62 char *pos = InputString; 63 if (strncmp(pos, kDataCmd, strlen(kDataCmd)) == 0) { 64 IsData = true; 65 pos += strlen(kDataCmd); 66 } else if (strncmp(pos, kCodeCmd, strlen(kCodeCmd)) == 0) { 67 IsData = false; 68 pos += strlen(kCodeCmd); 69 } else { 70 // If no cmd, assume it's CODE. 71 IsData = false; 72 } 73 // FIXME: Handle case when filename is given in quotes. 74 if (char *FilePath = strtok(pos, kDelimiters)) { 75 ModuleName = FilePath; 76 if (char *OffsetStr = strtok((char *)0, kDelimiters)) 77 ModuleOffsetStr = OffsetStr; 78 } 79 if (StringRef(ModuleOffsetStr).getAsInteger(0, ModuleOffset)) 80 return false; 81 return true; 82 } 83 84 int main(int argc, char **argv) { 85 // Print stack trace if we signal out. 86 sys::PrintStackTraceOnErrorSignal(); 87 PrettyStackTraceProgram X(argc, argv); 88 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 89 90 cl::ParseCommandLineOptions(argc, argv, "llvm symbolizer for compiler-rt\n"); 91 LLVMSymbolizer::Options Opts(ClUseSymbolTable, ClPrintFunctions, 92 ClPrintInlining, ClDemangle); 93 LLVMSymbolizer Symbolizer(Opts); 94 95 bool IsData = false; 96 std::string ModuleName; 97 uint64_t ModuleOffset; 98 while (parseCommand(IsData, ModuleName, ModuleOffset)) { 99 std::string Result = 100 IsData ? Symbolizer.symbolizeData(ModuleName, ModuleOffset) 101 : Symbolizer.symbolizeCode(ModuleName, ModuleOffset); 102 outs() << Result << "\n"; 103 outs().flush(); 104 } 105 return 0; 106 } 107
