llvm-symbolizer.cpp revision 263508
1319339Sasomers//===-- llvm-symbolizer.cpp - Simple addr2line-like symbolizer ------------===// 2319339Sasomers// 3319339Sasomers// The LLVM Compiler Infrastructure 4319339Sasomers// 5319339Sasomers// This file is distributed under the University of Illinois Open Source 6319339Sasomers// License. See LICENSE.TXT for details. 7319339Sasomers// 8319339Sasomers//===----------------------------------------------------------------------===// 9319339Sasomers// 10319339Sasomers// This utility works much like "addr2line". It is able of transforming 11319339Sasomers// tuples (module name, module offset) to code locations (function name, 12319339Sasomers// file, line number, column number). It is targeted for compiler-rt tools 13319339Sasomers// (especially AddressSanitizer and ThreadSanitizer) that can use it 14319339Sasomers// to symbolize stack traces in their error reports. 15319339Sasomers// 16319339Sasomers//===----------------------------------------------------------------------===// 17319339Sasomers 18319339Sasomers#include "LLVMSymbolize.h" 19319339Sasomers#include "llvm/ADT/StringRef.h" 20319339Sasomers#include "llvm/Support/CommandLine.h" 21319339Sasomers#include "llvm/Support/Debug.h" 22319339Sasomers#include "llvm/Support/ManagedStatic.h" 23319339Sasomers#include "llvm/Support/PrettyStackTrace.h" 24319339Sasomers#include "llvm/Support/Signals.h" 25319339Sasomers#include "llvm/Support/raw_ostream.h" 26319339Sasomers#include <cstdio> 27319339Sasomers#include <cstring> 28319339Sasomers#include <string> 29321140Sngie 30321140Sngieusing namespace llvm; 31321140Sngieusing namespace symbolize; 32321140Sngie 33319339Sasomersstatic cl::opt<bool> 34321140SngieClUseSymbolTable("use-symbol-table", cl::init(true), 35321140Sngie cl::desc("Prefer names in symbol table to names " 36321140Sngie "in debug info")); 37321140Sngie 38321140Sngiestatic cl::opt<bool> 39321140SngieClPrintFunctions("functions", cl::init(true), 40321140Sngie cl::desc("Print function names as well as line " 41321140Sngie "information for a given address")); 42321140Sngie 43321140Sngiestatic cl::opt<bool> 44321140SngieClPrintInlining("inlining", cl::init(true), 45319339Sasomers cl::desc("Print all inlined frames for a given address")); 46319339Sasomers 47319339Sasomersstatic cl::opt<bool> 48321140SngieClDemangle("demangle", cl::init(true), cl::desc("Demangle function names")); 49319339Sasomers 50321140Sngiestatic cl::opt<std::string> ClDefaultArch("default-arch", cl::init(""), 51321140Sngie cl::desc("Default architecture " 52321140Sngie "(for multi-arch objects)")); 53321140Sngie 54321140Sngiestatic bool parseCommand(bool &IsData, std::string &ModuleName, 55321140Sngie uint64_t &ModuleOffset) { 56321140Sngie const char *kDataCmd = "DATA "; 57321140Sngie const char *kCodeCmd = "CODE "; 58319339Sasomers const int kMaxInputStringLength = 1024; 59319339Sasomers const char kDelimiters[] = " \n"; 60319339Sasomers char InputString[kMaxInputStringLength]; 61319339Sasomers if (!fgets(InputString, sizeof(InputString), stdin)) 62319339Sasomers return false; 63319339Sasomers IsData = false; 64319339Sasomers ModuleName = ""; 65319339Sasomers std::string ModuleOffsetStr = ""; 66319339Sasomers char *pos = InputString; 67321140Sngie if (strncmp(pos, kDataCmd, strlen(kDataCmd)) == 0) { 68321140Sngie IsData = true; 69319339Sasomers 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