llvm-symbolizer.cpp revision 263508
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 30using namespace llvm; 31using namespace symbolize; 32 33static cl::opt<bool> 34ClUseSymbolTable("use-symbol-table", cl::init(true), 35 cl::desc("Prefer names in symbol table to names " 36 "in debug info")); 37 38static cl::opt<bool> 39ClPrintFunctions("functions", cl::init(true), 40 cl::desc("Print function names as well as line " 41 "information for a given address")); 42 43static cl::opt<bool> 44ClPrintInlining("inlining", cl::init(true), 45 cl::desc("Print all inlined frames for a given address")); 46 47static cl::opt<bool> 48ClDemangle("demangle", cl::init(true), cl::desc("Demangle function names")); 49 50static cl::opt<std::string> ClDefaultArch("default-arch", cl::init(""), 51 cl::desc("Default architecture " 52 "(for multi-arch objects)")); 53 54static bool parseCommand(bool &IsData, std::string &ModuleName, 55 uint64_t &ModuleOffset) { 56 const char *kDataCmd = "DATA "; 57 const char *kCodeCmd = "CODE "; 58 const int kMaxInputStringLength = 1024; 59 const char kDelimiters[] = " \n"; 60 char InputString[kMaxInputStringLength]; 61 if (!fgets(InputString, sizeof(InputString), stdin)) 62 return false; 63 IsData = false; 64 ModuleName = ""; 65 std::string ModuleOffsetStr = ""; 66 char *pos = InputString; 67 if (strncmp(pos, kDataCmd, strlen(kDataCmd)) == 0) { 68 IsData = true; 69 pos += strlen(kDataCmd); 70 } else if (strncmp(pos, kCodeCmd, strlen(kCodeCmd)) == 0) { 71 IsData = false; 72 pos += strlen(kCodeCmd); 73 } else { 74 // If no cmd, assume it's CODE. 75 IsData = false; 76 } 77 // Skip delimiters and parse input filename. 78 pos += strspn(pos, kDelimiters); 79 if (*pos == '"' || *pos == '\'') { 80 char quote = *pos; 81 pos++; 82 char *end = strchr(pos, quote); 83 if (end == 0) 84 return false; 85 ModuleName = std::string(pos, end - pos); 86 pos = end + 1; 87 } else { 88 int name_length = strcspn(pos, kDelimiters); 89 ModuleName = std::string(pos, name_length); 90 pos += name_length; 91 } 92 // Skip delimiters and parse module offset. 93 pos += strspn(pos, kDelimiters); 94 int offset_length = strcspn(pos, kDelimiters); 95 ModuleOffsetStr = std::string(pos, offset_length); 96 if (StringRef(ModuleOffsetStr).getAsInteger(0, ModuleOffset)) 97 return false; 98 return true; 99} 100 101int main(int argc, char **argv) { 102 // Print stack trace if we signal out. 103 sys::PrintStackTraceOnErrorSignal(); 104 PrettyStackTraceProgram X(argc, argv); 105 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 106 107 cl::ParseCommandLineOptions(argc, argv, "llvm symbolizer for compiler-rt\n"); 108 LLVMSymbolizer::Options Opts(ClUseSymbolTable, ClPrintFunctions, 109 ClPrintInlining, ClDemangle, ClDefaultArch); 110 LLVMSymbolizer Symbolizer(Opts); 111 112 bool IsData = false; 113 std::string ModuleName; 114 uint64_t ModuleOffset; 115 while (parseCommand(IsData, ModuleName, ModuleOffset)) { 116 std::string Result = 117 IsData ? Symbolizer.symbolizeData(ModuleName, ModuleOffset) 118 : Symbolizer.symbolizeCode(ModuleName, ModuleOffset); 119 outs() << Result << "\n"; 120 outs().flush(); 121 } 122 return 0; 123} 124