aboutsummaryrefslogtreecommitdiff
path: root/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
blob: 7ec70e42f1c1fd73033729cea6e2c1985ae9dd6c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
//===-- llvm-symbolizer.cpp - Simple addr2line-like symbolizer ------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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 "Opts.inc"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Config/config.h"
#include "llvm/DebugInfo/Symbolize/DIPrinter.h"
#include "llvm/DebugInfo/Symbolize/Markup.h"
#include "llvm/DebugInfo/Symbolize/MarkupFilter.h"
#include "llvm/DebugInfo/Symbolize/SymbolizableModule.h"
#include "llvm/DebugInfo/Symbolize/Symbolize.h"
#include "llvm/Debuginfod/DIFetcher.h"
#include "llvm/Debuginfod/Debuginfod.h"
#include "llvm/Debuginfod/HTTPClient.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.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/StringSaver.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <string>

using namespace llvm;
using namespace symbolize;

namespace {
enum ID {
  OPT_INVALID = 0, // This is not an option ID.
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
               HELPTEXT, METAVAR, VALUES)                                      \
  OPT_##ID,
#include "Opts.inc"
#undef OPTION
};

#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
#include "Opts.inc"
#undef PREFIX

const opt::OptTable::Info InfoTable[] = {
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
               HELPTEXT, METAVAR, VALUES)                                      \
  {                                                                            \
      PREFIX,      NAME,      HELPTEXT,                                        \
      METAVAR,     OPT_##ID,  opt::Option::KIND##Class,                        \
      PARAM,       FLAGS,     OPT_##GROUP,                                     \
      OPT_##ALIAS, ALIASARGS, VALUES},
#include "Opts.inc"
#undef OPTION
};

class SymbolizerOptTable : public opt::OptTable {
public:
  SymbolizerOptTable() : OptTable(InfoTable) {
    setGroupedShortOptions(true);
  }
};
} // namespace

template <typename T>
static void print(const Request &Request, Expected<T> &ResOrErr,
                  DIPrinter &Printer) {
  if (ResOrErr) {
    // No error, print the result.
    Printer.print(Request, *ResOrErr);
    return;
  }

  // Handle the error.
  bool PrintEmpty = true;
  handleAllErrors(std::move(ResOrErr.takeError()),
                  [&](const ErrorInfoBase &EI) {
                    PrintEmpty = Printer.printError(
                        Request, EI, "LLVMSymbolizer: error reading file: ");
                  });

  if (PrintEmpty)
    Printer.print(Request, T());
}

enum class OutputStyle { LLVM, GNU, JSON };

enum class Command {
  Code,
  Data,
  Frame,
};

static void enableDebuginfod(LLVMSymbolizer &Symbolizer) {
  static bool IsEnabled = false;
  if (IsEnabled)
    return;
  IsEnabled = true;
  // Look up symbols using the debuginfod client.
  Symbolizer.addDIFetcher(std::make_unique<DebuginfodDIFetcher>());
  // The HTTPClient must be initialized for use by the debuginfod client.
  HTTPClient::initialize();
}

static SmallVector<uint8_t> parseBuildID(StringRef Str) {
  std::string Bytes;
  if (!tryGetFromHex(Str, Bytes))
    return {};
  ArrayRef<uint8_t> BuildID(reinterpret_cast<const uint8_t *>(Bytes.data()),
                            Bytes.size());
  return SmallVector<uint8_t>(BuildID.begin(), BuildID.end());
}

static bool parseCommand(StringRef BinaryName, bool IsAddr2Line,
                         StringRef InputString, Command &Cmd,
                         std::string &ModuleName,
                         SmallVectorImpl<uint8_t> &BuildID,
                         uint64_t &ModuleOffset) {
  const char kDelimiters[] = " \n\r";
  ModuleName = "";
  if (InputString.consume_front("CODE ")) {
    Cmd = Command::Code;
  } else if (InputString.consume_front("DATA ")) {
    Cmd = Command::Data;
  } else if (InputString.consume_front("FRAME ")) {
    Cmd = Command::Frame;
  } else {
    // If no cmd, assume it's CODE.
    Cmd = Command::Code;
  }

  const char *Pos;
  // Skip delimiters and parse input filename (if needed).
  if (BinaryName.empty() && BuildID.empty()) {
    bool HasFilePrefix = false;
    bool HasBuildIDPrefix = false;
    while (true) {
      if (InputString.consume_front("FILE:")) {
        if (HasFilePrefix)
          return false;
        HasFilePrefix = true;
        continue;
      }
      if (InputString.consume_front("BUILDID:")) {
        if (HasBuildIDPrefix)
          return false;
        HasBuildIDPrefix = true;
        continue;
      }
      break;
    }
    if (HasFilePrefix && HasBuildIDPrefix)
      return false;

    Pos = InputString.data();
    Pos += strspn(Pos, kDelimiters);
    if (*Pos == '"' || *Pos == '\'') {
      char Quote = *Pos;
      Pos++;
      const char *End = strchr(Pos, Quote);
      if (!End)
        return false;
      ModuleName = std::string(Pos, End - Pos);
      Pos = End + 1;
    } else {
      int NameLength = strcspn(Pos, kDelimiters);
      ModuleName = std::string(Pos, NameLength);
      Pos += NameLength;
    }
    if (HasBuildIDPrefix) {
      BuildID = parseBuildID(ModuleName);
      if (BuildID.empty())
        return false;
      ModuleName.clear();
    }
  } else {
    Pos = InputString.data();
    ModuleName = BinaryName.str();
  }
  // Skip delimiters and parse module offset.
  Pos += strspn(Pos, kDelimiters);
  int OffsetLength = strcspn(Pos, kDelimiters);
  StringRef Offset(Pos, OffsetLength);
  // GNU addr2line assumes the offset is hexadecimal and allows a redundant
  // "0x" or "0X" prefix; do the same for compatibility.
  if (IsAddr2Line)
    Offset.consume_front("0x") || Offset.consume_front("0X");
  return !Offset.getAsInteger(IsAddr2Line ? 16 : 0, ModuleOffset);
}

template <typename T>
void executeCommand(StringRef ModuleName, const T &ModuleSpec, Command Cmd,
                    uint64_t Offset, uint64_t AdjustVMA, bool ShouldInline,
                    OutputStyle Style, LLVMSymbolizer &Symbolizer,
                    DIPrinter &Printer) {
  uint64_t AdjustedOffset = Offset - AdjustVMA;
  object::SectionedAddress Address = {AdjustedOffset,
                                      object::SectionedAddress::UndefSection};
  if (Cmd == Command::Data) {
    Expected<DIGlobal> ResOrErr = Symbolizer.symbolizeData(ModuleSpec, Address);
    print({ModuleName, Offset}, ResOrErr, Printer);
  } else if (Cmd == Command::Frame) {
    Expected<std::vector<DILocal>> ResOrErr =
        Symbolizer.symbolizeFrame(ModuleSpec, Address);
    print({ModuleName, Offset}, ResOrErr, Printer);
  } else if (ShouldInline) {
    Expected<DIInliningInfo> ResOrErr =
        Symbolizer.symbolizeInlinedCode(ModuleSpec, Address);
    print({ModuleName, Offset}, ResOrErr, Printer);
  } else if (Style == OutputStyle::GNU) {
    // With PrintFunctions == FunctionNameKind::LinkageName (default)
    // and UseSymbolTable == true (also default), Symbolizer.symbolizeCode()
    // may override the name of an inlined function with the name of the topmost
    // caller function in the inlining chain. This contradicts the existing
    // behavior of addr2line. Symbolizer.symbolizeInlinedCode() overrides only
    // the topmost function, which suits our needs better.
    Expected<DIInliningInfo> ResOrErr =
        Symbolizer.symbolizeInlinedCode(ModuleSpec, Address);
    Expected<DILineInfo> Res0OrErr =
        !ResOrErr
            ? Expected<DILineInfo>(ResOrErr.takeError())
            : ((ResOrErr->getNumberOfFrames() == 0) ? DILineInfo()
                                                    : ResOrErr->getFrame(0));
    print({ModuleName, Offset}, Res0OrErr, Printer);
  } else {
    Expected<DILineInfo> ResOrErr =
        Symbolizer.symbolizeCode(ModuleSpec, Address);
    print({ModuleName, Offset}, ResOrErr, Printer);
  }
  Symbolizer.pruneCache();
}

static void symbolizeInput(const opt::InputArgList &Args,
                           ArrayRef<uint8_t> IncomingBuildID,
                           uint64_t AdjustVMA, bool IsAddr2Line,
                           OutputStyle Style, StringRef InputString,
                           LLVMSymbolizer &Symbolizer, DIPrinter &Printer) {
  Command Cmd;
  std::string ModuleName;
  SmallVector<uint8_t> BuildID(IncomingBuildID.begin(), IncomingBuildID.end());
  uint64_t Offset = 0;
  if (!parseCommand(Args.getLastArgValue(OPT_obj_EQ), IsAddr2Line,
                    StringRef(InputString), Cmd, ModuleName, BuildID, Offset)) {
    Printer.printInvalidCommand({ModuleName, None}, InputString);
    return;
  }
  bool ShouldInline = Args.hasFlag(OPT_inlines, OPT_no_inlines, !IsAddr2Line);
  if (!BuildID.empty()) {
    assert(ModuleName.empty());
    if (!Args.hasArg(OPT_no_debuginfod))
      enableDebuginfod(Symbolizer);
    std::string BuildIDStr = toHex(BuildID);
    executeCommand(BuildIDStr, BuildID, Cmd, Offset, AdjustVMA, ShouldInline,
                   Style, Symbolizer, Printer);
  } else {
    executeCommand(ModuleName, ModuleName, Cmd, Offset, AdjustVMA, ShouldInline,
                   Style, Symbolizer, Printer);
  }
}

static void printHelp(StringRef ToolName, const SymbolizerOptTable &Tbl,
                      raw_ostream &OS) {
  const char HelpText[] = " [options] addresses...";
  Tbl.printHelp(OS, (ToolName + HelpText).str().c_str(),
                ToolName.str().c_str());
  // TODO Replace this with OptTable API once it adds extrahelp support.
  OS << "\nPass @FILE as argument to read options from FILE.\n";
}

static opt::InputArgList parseOptions(int Argc, char *Argv[], bool IsAddr2Line,
                                      StringSaver &Saver,
                                      SymbolizerOptTable &Tbl) {
  StringRef ToolName = IsAddr2Line ? "llvm-addr2line" : "llvm-symbolizer";
  // The environment variable specifies initial options which can be overridden
  // by commnad line options.
  Tbl.setInitialOptionsFromEnvironment(IsAddr2Line ? "LLVM_ADDR2LINE_OPTS"
                                                   : "LLVM_SYMBOLIZER_OPTS");
  bool HasError = false;
  opt::InputArgList Args =
      Tbl.parseArgs(Argc, Argv, OPT_UNKNOWN, Saver, [&](StringRef Msg) {
        errs() << ("error: " + Msg + "\n");
        HasError = true;
      });
  if (HasError)
    exit(1);
  if (Args.hasArg(OPT_help)) {
    printHelp(ToolName, Tbl, outs());
    exit(0);
  }
  if (Args.hasArg(OPT_version)) {
    outs() << ToolName << '\n';
    cl::PrintVersionMessage();
    exit(0);
  }

  return Args;
}

template <typename T>
static void parseIntArg(const opt::InputArgList &Args, int ID, T &Value) {
  if (const opt::Arg *A = Args.getLastArg(ID)) {
    StringRef V(A->getValue());
    if (!llvm::to_integer(V, Value, 0)) {
      errs() << A->getSpelling() +
                    ": expected a non-negative integer, but got '" + V + "'";
      exit(1);
    }
  } else {
    Value = 0;
  }
}

static FunctionNameKind decideHowToPrintFunctions(const opt::InputArgList &Args,
                                                  bool IsAddr2Line) {
  if (Args.hasArg(OPT_functions))
    return FunctionNameKind::LinkageName;
  if (const opt::Arg *A = Args.getLastArg(OPT_functions_EQ))
    return StringSwitch<FunctionNameKind>(A->getValue())
        .Case("none", FunctionNameKind::None)
        .Case("short", FunctionNameKind::ShortName)
        .Default(FunctionNameKind::LinkageName);
  return IsAddr2Line ? FunctionNameKind::None : FunctionNameKind::LinkageName;
}

static Optional<bool> parseColorArg(const opt::InputArgList &Args) {
  if (Args.hasArg(OPT_color))
    return true;
  if (const opt::Arg *A = Args.getLastArg(OPT_color_EQ))
    return StringSwitch<Optional<bool>>(A->getValue())
        .Case("always", true)
        .Case("never", false)
        .Case("auto", None);
  return None;
}

static SmallVector<uint8_t> parseBuildIDArg(const opt::InputArgList &Args,
                                            int ID) {
  const opt::Arg *A = Args.getLastArg(ID);
  if (!A)
    return {};

  StringRef V(A->getValue());
  SmallVector<uint8_t> BuildID = parseBuildID(V);
  if (BuildID.empty()) {
    errs() << A->getSpelling() + ": expected a build ID, but got '" + V + "'\n";
    exit(1);
  }
  return BuildID;
}

// Symbolize markup from stdin and write the result to stdout.
static void filterMarkup(const opt::InputArgList &Args) {
  MarkupFilter Filter(outs(), parseColorArg(Args));
  std::string InputString;
  while (std::getline(std::cin, InputString)) {
    InputString += '\n';
    Filter.filter(InputString);
  }
  Filter.finish();
}

ExitOnError ExitOnErr;

int main(int argc, char **argv) {
  InitLLVM X(argc, argv);
  sys::InitializeCOMRAII COM(sys::COMThreadingMode::MultiThreaded);

  bool IsAddr2Line = sys::path::stem(argv[0]).contains("addr2line");
  BumpPtrAllocator A;
  StringSaver Saver(A);
  SymbolizerOptTable Tbl;
  opt::InputArgList Args = parseOptions(argc, argv, IsAddr2Line, Saver, Tbl);

  LLVMSymbolizer::Options Opts;
  uint64_t AdjustVMA;
  PrinterConfig Config;
  parseIntArg(Args, OPT_adjust_vma_EQ, AdjustVMA);
  if (const opt::Arg *A = Args.getLastArg(OPT_basenames, OPT_relativenames)) {
    Opts.PathStyle =
        A->getOption().matches(OPT_basenames)
            ? DILineInfoSpecifier::FileLineInfoKind::BaseNameOnly
            : DILineInfoSpecifier::FileLineInfoKind::RelativeFilePath;
  } else {
    Opts.PathStyle = DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath;
  }
  Opts.DebugFileDirectory = Args.getAllArgValues(OPT_debug_file_directory_EQ);
  Opts.DefaultArch = Args.getLastArgValue(OPT_default_arch_EQ).str();
  Opts.Demangle = Args.hasFlag(OPT_demangle, OPT_no_demangle, !IsAddr2Line);
  Opts.DWPName = Args.getLastArgValue(OPT_dwp_EQ).str();
  Opts.FallbackDebugPath =
      Args.getLastArgValue(OPT_fallback_debug_path_EQ).str();
  Opts.PrintFunctions = decideHowToPrintFunctions(Args, IsAddr2Line);
  parseIntArg(Args, OPT_print_source_context_lines_EQ,
              Config.SourceContextLines);
  Opts.RelativeAddresses = Args.hasArg(OPT_relative_address);
  Opts.UntagAddresses =
      Args.hasFlag(OPT_untag_addresses, OPT_no_untag_addresses, !IsAddr2Line);
  Opts.UseDIA = Args.hasArg(OPT_use_dia);
#if !defined(LLVM_ENABLE_DIA_SDK)
  if (Opts.UseDIA) {
    WithColor::warning() << "DIA not available; using native PDB reader\n";
    Opts.UseDIA = false;
  }
#endif
  Opts.UseSymbolTable = true;
  if (Args.hasArg(OPT_cache_size_EQ))
    parseIntArg(Args, OPT_cache_size_EQ, Opts.MaxCacheSize);
  Config.PrintAddress = Args.hasArg(OPT_addresses);
  Config.PrintFunctions = Opts.PrintFunctions != FunctionNameKind::None;
  Config.Pretty = Args.hasArg(OPT_pretty_print);
  Config.Verbose = Args.hasArg(OPT_verbose);

  for (const opt::Arg *A : Args.filtered(OPT_dsym_hint_EQ)) {
    StringRef Hint(A->getValue());
    if (sys::path::extension(Hint) == ".dSYM") {
      Opts.DsymHints.emplace_back(Hint);
    } else {
      errs() << "Warning: invalid dSYM hint: \"" << Hint
             << "\" (must have the '.dSYM' extension).\n";
    }
  }

  if (Args.hasArg(OPT_filter_markup)) {
    filterMarkup(Args);
    return 0;
  }

  auto Style = IsAddr2Line ? OutputStyle::GNU : OutputStyle::LLVM;
  if (const opt::Arg *A = Args.getLastArg(OPT_output_style_EQ)) {
    if (strcmp(A->getValue(), "GNU") == 0)
      Style = OutputStyle::GNU;
    else if (strcmp(A->getValue(), "JSON") == 0)
      Style = OutputStyle::JSON;
    else
      Style = OutputStyle::LLVM;
  }

  if (Args.hasArg(OPT_build_id_EQ) && Args.hasArg(OPT_obj_EQ)) {
    errs() << "error: cannot specify both --build-id and --obj\n";
    return EXIT_FAILURE;
  }
  SmallVector<uint8_t> BuildID = parseBuildIDArg(Args, OPT_build_id_EQ);

  LLVMSymbolizer Symbolizer(Opts);

  // A debuginfod lookup could succeed if a HTTP client is available and at
  // least one backing URL is configured.
  bool ShouldUseDebuginfodByDefault =
      HTTPClient::isAvailable() &&
      !ExitOnErr(getDefaultDebuginfodUrls()).empty();
  if (Args.hasFlag(OPT_debuginfod, OPT_no_debuginfod,
                   ShouldUseDebuginfodByDefault))
    enableDebuginfod(Symbolizer);

  std::unique_ptr<DIPrinter> Printer;
  if (Style == OutputStyle::GNU)
    Printer = std::make_unique<GNUPrinter>(outs(), errs(), Config);
  else if (Style == OutputStyle::JSON)
    Printer = std::make_unique<JSONPrinter>(outs(), Config);
  else
    Printer = std::make_unique<LLVMPrinter>(outs(), errs(), Config);

  std::vector<std::string> InputAddresses = Args.getAllArgValues(OPT_INPUT);
  if (InputAddresses.empty()) {
    const int kMaxInputStringLength = 1024;
    char InputString[kMaxInputStringLength];

    while (fgets(InputString, sizeof(InputString), stdin)) {
      // Strip newline characters.
      std::string StrippedInputString(InputString);
      llvm::erase_if(StrippedInputString,
                     [](char c) { return c == '\r' || c == '\n'; });
      symbolizeInput(Args, BuildID, AdjustVMA, IsAddr2Line, Style,
                     StrippedInputString, Symbolizer, *Printer);
      outs().flush();
    }
  } else {
    Printer->listBegin();
    for (StringRef Address : InputAddresses)
      symbolizeInput(Args, BuildID, AdjustVMA, IsAddr2Line, Style, Address,
                     Symbolizer, *Printer);
    Printer->listEnd();
  }

  return 0;
}