LLVM  7.0.0svn
ArchiveWriter.cpp
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1 //===- ArchiveWriter.cpp - ar File Format implementation --------*- C++ -*-===//
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 file defines the writeArchive function.
11 //
12 //===----------------------------------------------------------------------===//
13 
15 #include "llvm/ADT/ArrayRef.h"
16 #include "llvm/ADT/StringRef.h"
18 #include "llvm/IR/LLVMContext.h"
19 #include "llvm/Object/Archive.h"
20 #include "llvm/Object/ObjectFile.h"
23 #include "llvm/Support/Errc.h"
25 #include "llvm/Support/Format.h"
26 #include "llvm/Support/Path.h"
29 
30 #if !defined(_MSC_VER) && !defined(__MINGW32__)
31 #include <unistd.h>
32 #else
33 #include <io.h>
34 #endif
35 
36 using namespace llvm;
37 
39  : Buf(MemoryBuffer::getMemBuffer(BufRef, false)),
40  MemberName(BufRef.getBufferIdentifier()) {}
41 
44  bool Deterministic) {
46  if (!BufOrErr)
47  return BufOrErr.takeError();
48 
50  assert(M.IsNew == false);
51  M.Buf = MemoryBuffer::getMemBuffer(*BufOrErr, false);
52  M.MemberName = M.Buf->getBufferIdentifier();
53  if (!Deterministic) {
54  auto ModTimeOrErr = OldMember.getLastModified();
55  if (!ModTimeOrErr)
56  return ModTimeOrErr.takeError();
57  M.ModTime = ModTimeOrErr.get();
58  Expected<unsigned> UIDOrErr = OldMember.getUID();
59  if (!UIDOrErr)
60  return UIDOrErr.takeError();
61  M.UID = UIDOrErr.get();
62  Expected<unsigned> GIDOrErr = OldMember.getGID();
63  if (!GIDOrErr)
64  return GIDOrErr.takeError();
65  M.GID = GIDOrErr.get();
66  Expected<sys::fs::perms> AccessModeOrErr = OldMember.getAccessMode();
67  if (!AccessModeOrErr)
68  return AccessModeOrErr.takeError();
69  M.Perms = AccessModeOrErr.get();
70  }
71  return std::move(M);
72 }
73 
75  bool Deterministic) {
76  sys::fs::file_status Status;
77  int FD;
78  if (auto EC = sys::fs::openFileForRead(FileName, FD))
79  return errorCodeToError(EC);
80  assert(FD != -1);
81 
82  if (auto EC = sys::fs::status(FD, Status))
83  return errorCodeToError(EC);
84 
85  // Opening a directory doesn't make sense. Let it fail.
86  // Linux cannot open directories with open(2), although
87  // cygwin and *bsd can.
90 
91  ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
92  MemoryBuffer::getOpenFile(FD, FileName, Status.getSize(), false);
93  if (!MemberBufferOrErr)
94  return errorCodeToError(MemberBufferOrErr.getError());
95 
96  if (close(FD) != 0)
97  return errorCodeToError(std::error_code(errno, std::generic_category()));
98 
100  M.IsNew = true;
101  M.Buf = std::move(*MemberBufferOrErr);
102  M.MemberName = M.Buf->getBufferIdentifier();
103  if (!Deterministic) {
104  M.ModTime = std::chrono::time_point_cast<std::chrono::seconds>(
105  Status.getLastModificationTime());
106  M.UID = Status.getUser();
107  M.GID = Status.getGroup();
108  M.Perms = Status.permissions();
109  }
110  return std::move(M);
111 }
112 
113 template <typename T>
114 static void printWithSpacePadding(raw_ostream &OS, T Data, unsigned Size) {
115  uint64_t OldPos = OS.tell();
116  OS << Data;
117  unsigned SizeSoFar = OS.tell() - OldPos;
118  assert(SizeSoFar <= Size && "Data doesn't fit in Size");
119  OS.indent(Size - SizeSoFar);
120 }
121 
123  switch (Kind) {
126  return false;
129  return true;
132  break;
133  }
134  llvm_unreachable("not supported for writting");
135 }
136 
137 template <class T>
138 static void print(raw_ostream &Out, object::Archive::Kind Kind, T Val) {
139  support::endian::write(Out, Val,
141 }
142 
145  unsigned UID, unsigned GID, unsigned Perms, unsigned Size) {
146  printWithSpacePadding(Out, sys::toTimeT(ModTime), 12);
147 
148  // The format has only 6 chars for uid and gid. Truncate if the provided
149  // values don't fit.
150  printWithSpacePadding(Out, UID % 1000000, 6);
151  printWithSpacePadding(Out, GID % 1000000, 6);
152 
153  printWithSpacePadding(Out, format("%o", Perms), 8);
154  printWithSpacePadding(Out, Size, 10);
155  Out << "`\n";
156 }
157 
158 static void
161  unsigned UID, unsigned GID, unsigned Perms,
162  unsigned Size) {
163  printWithSpacePadding(Out, Twine(Name) + "/", 16);
164  printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
165 }
166 
167 static void
170  unsigned UID, unsigned GID, unsigned Perms,
171  unsigned Size) {
172  uint64_t PosAfterHeader = Pos + 60 + Name.size();
173  // Pad so that even 64 bit object files are aligned.
174  unsigned Pad = OffsetToAlignment(PosAfterHeader, 8);
175  unsigned NameWithPadding = Name.size() + Pad;
176  printWithSpacePadding(Out, Twine("#1/") + Twine(NameWithPadding), 16);
177  printRestOfMemberHeader(Out, ModTime, UID, GID, Perms,
178  NameWithPadding + Size);
179  Out << Name;
180  while (Pad--)
181  Out.write(uint8_t(0));
182 }
183 
184 static bool useStringTable(bool Thin, StringRef Name) {
185  return Thin || Name.size() >= 16 || Name.contains('/');
186 }
187 
188 // Compute the relative path from From to To.
189 static std::string computeRelativePath(StringRef From, StringRef To) {
191  return To;
192 
193  StringRef DirFrom = sys::path::parent_path(From);
194  auto FromI = sys::path::begin(DirFrom);
195  auto ToI = sys::path::begin(To);
196  while (*FromI == *ToI) {
197  ++FromI;
198  ++ToI;
199  }
200 
201  SmallString<128> Relative;
202  for (auto FromE = sys::path::end(DirFrom); FromI != FromE; ++FromI)
203  sys::path::append(Relative, "..");
204 
205  for (auto ToE = sys::path::end(To); ToI != ToE; ++ToI)
206  sys::path::append(Relative, *ToI);
207 
208 #ifdef _WIN32
209  // Replace backslashes with slashes so that the path is portable between *nix
210  // and Windows.
211  std::replace(Relative.begin(), Relative.end(), '\\', '/');
212 #endif
213 
214  return Relative.str();
215 }
216 
218  switch (Kind) {
223  return false;
226  return true;
227  }
228  llvm_unreachable("not supported for writting");
229 }
230 
231 static void addToStringTable(raw_ostream &Out, StringRef ArcName,
232  const NewArchiveMember &M, bool Thin) {
233  StringRef ID = M.Buf->getBufferIdentifier();
234  if (Thin) {
235  if (M.IsNew)
236  Out << computeRelativePath(ArcName, ID);
237  else
238  Out << ID;
239  } else
240  Out << M.MemberName;
241  Out << "/\n";
242 }
243 
244 static void printMemberHeader(raw_ostream &Out, uint64_t Pos,
245  raw_ostream &StringTable,
246  object::Archive::Kind Kind, bool Thin,
247  StringRef ArcName, const NewArchiveMember &M,
248  unsigned Size) {
249  if (isBSDLike(Kind))
250  return printBSDMemberHeader(Out, Pos, M.MemberName, M.ModTime, M.UID, M.GID,
251  M.Perms, Size);
252  if (!useStringTable(Thin, M.MemberName))
253  return printGNUSmallMemberHeader(Out, M.MemberName, M.ModTime, M.UID, M.GID,
254  M.Perms, Size);
255  Out << '/';
256  uint64_t NamePos = StringTable.tell();
257  addToStringTable(StringTable, ArcName, M, Thin);
258  printWithSpacePadding(Out, NamePos, 15);
259  printRestOfMemberHeader(Out, M.ModTime, M.UID, M.GID, M.Perms, Size);
260 }
261 
262 namespace {
263 struct MemberData {
264  std::vector<unsigned> Symbols;
265  std::string Header;
266  StringRef Data;
267  StringRef Padding;
268 };
269 } // namespace
270 
271 static MemberData computeStringTable(StringRef Names) {
272  unsigned Size = Names.size();
273  unsigned Pad = OffsetToAlignment(Size, 2);
274  std::string Header;
275  raw_string_ostream Out(Header);
276  printWithSpacePadding(Out, "//", 48);
277  printWithSpacePadding(Out, Size + Pad, 10);
278  Out << "`\n";
279  Out.flush();
280  return {{}, std::move(Header), Names, Pad ? "\n" : ""};
281 }
282 
283 static sys::TimePoint<std::chrono::seconds> now(bool Deterministic) {
284  using namespace std::chrono;
285 
286  if (!Deterministic)
287  return time_point_cast<seconds>(system_clock::now());
288  return sys::TimePoint<seconds>();
289 }
290 
292  uint32_t Symflags = S.getFlags();
294  return false;
295  if (!(Symflags & object::SymbolRef::SF_Global))
296  return false;
297  if (Symflags & object::SymbolRef::SF_Undefined)
298  return false;
299  return true;
300 }
301 
303  uint64_t Val) {
304  if (is64BitKind(Kind))
305  print<uint64_t>(Out, Kind, Val);
306  else
307  print<uint32_t>(Out, Kind, Val);
308 }
309 
311  bool Deterministic, ArrayRef<MemberData> Members,
312  StringRef StringTable) {
313  if (StringTable.empty())
314  return;
315 
316  unsigned NumSyms = 0;
317  for (const MemberData &M : Members)
318  NumSyms += M.Symbols.size();
319 
320  unsigned Size = 0;
321  Size += is64BitKind(Kind) ? 8 : 4; // Number of entries
322  if (isBSDLike(Kind))
323  Size += NumSyms * 8; // Table
324  else if (is64BitKind(Kind))
325  Size += NumSyms * 8; // Table
326  else
327  Size += NumSyms * 4; // Table
328  if (isBSDLike(Kind))
329  Size += 4; // byte count
330  Size += StringTable.size();
331  // ld64 expects the members to be 8-byte aligned for 64-bit content and at
332  // least 4-byte aligned for 32-bit content. Opt for the larger encoding
333  // uniformly.
334  // We do this for all bsd formats because it simplifies aligning members.
335  unsigned Alignment = isBSDLike(Kind) ? 8 : 2;
336  unsigned Pad = OffsetToAlignment(Size, Alignment);
337  Size += Pad;
338 
339  if (isBSDLike(Kind))
340  printBSDMemberHeader(Out, Out.tell(), "__.SYMDEF", now(Deterministic), 0, 0,
341  0, Size);
342  else if (is64BitKind(Kind))
343  printGNUSmallMemberHeader(Out, "/SYM64", now(Deterministic), 0, 0, 0, Size);
344  else
345  printGNUSmallMemberHeader(Out, "", now(Deterministic), 0, 0, 0, Size);
346 
347  uint64_t Pos = Out.tell() + Size;
348 
349  if (isBSDLike(Kind))
350  print<uint32_t>(Out, Kind, NumSyms * 8);
351  else
352  printNBits(Out, Kind, NumSyms);
353 
354  for (const MemberData &M : Members) {
355  for (unsigned StringOffset : M.Symbols) {
356  if (isBSDLike(Kind))
357  print<uint32_t>(Out, Kind, StringOffset);
358  printNBits(Out, Kind, Pos); // member offset
359  }
360  Pos += M.Header.size() + M.Data.size() + M.Padding.size();
361  }
362 
363  if (isBSDLike(Kind))
364  // byte count of the string table
365  print<uint32_t>(Out, Kind, StringTable.size());
366  Out << StringTable;
367 
368  while (Pad--)
369  Out.write(uint8_t(0));
370 }
371 
373 getSymbols(MemoryBufferRef Buf, raw_ostream &SymNames, bool &HasObject) {
374  std::vector<unsigned> Ret;
376 
379  &Context);
380  if (!ObjOrErr) {
381  // FIXME: check only for "not an object file" errors.
382  consumeError(ObjOrErr.takeError());
383  return Ret;
384  }
385 
386  HasObject = true;
387  object::SymbolicFile &Obj = *ObjOrErr.get();
388  for (const object::BasicSymbolRef &S : Obj.symbols()) {
389  if (!isArchiveSymbol(S))
390  continue;
391  Ret.push_back(SymNames.tell());
392  if (auto EC = S.printName(SymNames))
393  return errorCodeToError(EC);
394  SymNames << '\0';
395  }
396  return Ret;
397 }
398 
400 computeMemberData(raw_ostream &StringTable, raw_ostream &SymNames,
401  object::Archive::Kind Kind, bool Thin, StringRef ArcName,
402  ArrayRef<NewArchiveMember> NewMembers) {
403  static char PaddingData[8] = {'\n', '\n', '\n', '\n', '\n', '\n', '\n', '\n'};
404 
405  // This ignores the symbol table, but we only need the value mod 8 and the
406  // symbol table is aligned to be a multiple of 8 bytes
407  uint64_t Pos = 0;
408 
409  std::vector<MemberData> Ret;
410  bool HasObject = false;
411  for (const NewArchiveMember &M : NewMembers) {
412  std::string Header;
413  raw_string_ostream Out(Header);
414 
415  MemoryBufferRef Buf = M.Buf->getMemBufferRef();
416  StringRef Data = Thin ? "" : Buf.getBuffer();
417 
418  // ld64 expects the members to be 8-byte aligned for 64-bit content and at
419  // least 4-byte aligned for 32-bit content. Opt for the larger encoding
420  // uniformly. This matches the behaviour with cctools and ensures that ld64
421  // is happy with archives that we generate.
422  unsigned MemberPadding = Kind == object::Archive::K_DARWIN
423  ? OffsetToAlignment(Data.size(), 8)
424  : 0;
425  unsigned TailPadding = OffsetToAlignment(Data.size() + MemberPadding, 2);
426  StringRef Padding = StringRef(PaddingData, MemberPadding + TailPadding);
427 
428  printMemberHeader(Out, Pos, StringTable, Kind, Thin, ArcName, M,
429  Buf.getBufferSize() + MemberPadding);
430  Out.flush();
431 
433  getSymbols(Buf, SymNames, HasObject);
434  if (auto E = Symbols.takeError())
435  return std::move(E);
436 
437  Pos += Header.size() + Data.size() + Padding.size();
438  Ret.push_back({std::move(*Symbols), std::move(Header), Data, Padding});
439  }
440  // If there are no symbols, emit an empty symbol table, to satisfy Solaris
441  // tools, older versions of which expect a symbol table in a non-empty
442  // archive, regardless of whether there are any symbols in it.
443  if (HasObject && SymNames.tell() == 0)
444  SymNames << '\0' << '\0' << '\0';
445  return Ret;
446 }
447 
449  ArrayRef<NewArchiveMember> NewMembers,
450  bool WriteSymtab, object::Archive::Kind Kind,
451  bool Deterministic, bool Thin,
452  std::unique_ptr<MemoryBuffer> OldArchiveBuf) {
453  assert((!Thin || !isBSDLike(Kind)) && "Only the gnu format has a thin mode");
454 
455  SmallString<0> SymNamesBuf;
456  raw_svector_ostream SymNames(SymNamesBuf);
457  SmallString<0> StringTableBuf;
458  raw_svector_ostream StringTable(StringTableBuf);
459 
461  computeMemberData(StringTable, SymNames, Kind, Thin, ArcName, NewMembers);
462  if (Error E = DataOrErr.takeError())
463  return E;
464  std::vector<MemberData> &Data = *DataOrErr;
465 
466  if (!StringTableBuf.empty())
467  Data.insert(Data.begin(), computeStringTable(StringTableBuf));
468 
469  // We would like to detect if we need to switch to a 64-bit symbol table.
470  if (WriteSymtab) {
471  uint64_t MaxOffset = 0;
472  uint64_t LastOffset = MaxOffset;
473  for (const auto& M : Data) {
474  // Record the start of the member's offset
475  LastOffset = MaxOffset;
476  // Account for the size of each part associated with the member.
477  MaxOffset += M.Header.size() + M.Data.size() + M.Padding.size();
478  // We assume 32-bit symbols to see if 32-bit symbols are possible or not.
479  MaxOffset += M.Symbols.size() * 4;
480  }
481 
482  // The SYM64 format is used when an archive's member offsets are larger than
483  // 32-bits can hold. The need for this shift in format is detected by
484  // writeArchive. To test this we need to generate a file with a member that
485  // has an offset larger than 32-bits but this demands a very slow test. To
486  // speed the test up we use this environment variable to pretend like the
487  // cutoff happens before 32-bits and instead happens at some much smaller
488  // value.
489  const char *Sym64Env = std::getenv("SYM64_THRESHOLD");
490  int Sym64Threshold = 32;
491  if (Sym64Env)
492  StringRef(Sym64Env).getAsInteger(10, Sym64Threshold);
493 
494  // If LastOffset isn't going to fit in a 32-bit varible we need to switch
495  // to 64-bit. Note that the file can be larger than 4GB as long as the last
496  // member starts before the 4GB offset.
497  if (LastOffset >= (1ULL << Sym64Threshold))
499  }
500 
502  sys::fs::TempFile::create(ArcName + ".temp-archive-%%%%%%%.a");
503  if (!Temp)
504  return Temp.takeError();
505 
506  raw_fd_ostream Out(Temp->FD, false);
507  if (Thin)
508  Out << "!<thin>\n";
509  else
510  Out << "!<arch>\n";
511 
512  if (WriteSymtab)
513  writeSymbolTable(Out, Kind, Deterministic, Data, SymNamesBuf);
514 
515  for (const MemberData &M : Data)
516  Out << M.Header << M.Data << M.Padding;
517 
518  Out.flush();
519 
520  // At this point, we no longer need whatever backing memory
521  // was used to generate the NewMembers. On Windows, this buffer
522  // could be a mapped view of the file we want to replace (if
523  // we're updating an existing archive, say). In that case, the
524  // rename would still succeed, but it would leave behind a
525  // temporary file (actually the original file renamed) because
526  // a file cannot be deleted while there's a handle open on it,
527  // only renamed. So by freeing this buffer, this ensures that
528  // the last open handle on the destination file, if any, is
529  // closed before we attempt to rename.
530  OldArchiveBuf.reset();
531 
532  return Temp->keep(ArcName);
533 }
const_iterator end(StringRef path)
Get end iterator over path.
Definition: Path.cpp:250
Represents either an error or a value T.
Definition: ErrorOr.h:57
LLVM_ATTRIBUTE_ALWAYS_INLINE std::time_t toTimeT(TimePoint<> TP)
Convert a TimePoint to std::time_t.
Definition: Chrono.h:37
LLVMContext & Context
const_iterator begin(StringRef path, Style style=Style::native)
Get begin iterator over path.
Definition: Path.cpp:241
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
std::error_code openFileForRead(const Twine &Name, int &ResultFD, OpenFlags Flags=OF_None, SmallVectorImpl< char > *RealPath=nullptr)
Opens the file with the given name in a read-only mode, returning its open file descriptor.
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE bool contains(StringRef Other) const
Return true if the given string is a substring of *this, and false otherwise.
Definition: StringRef.h:448
static Expected< std::unique_ptr< SymbolicFile > > createSymbolicFile(MemoryBufferRef Object, llvm::file_magic Type, LLVMContext *Context)
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE size_t size() const
size - Get the string size.
Definition: StringRef.h:138
static std::unique_ptr< MemoryBuffer > getMemBuffer(StringRef InputData, StringRef BufferName="", bool RequiresNullTerminator=true)
Open the specified memory range as a MemoryBuffer.
format_object< Ts... > format(const char *Fmt, const Ts &... Vals)
These are helper functions used to produce formatted output.
Definition: Format.h:124
static void printBSDMemberHeader(raw_ostream &Out, uint64_t Pos, StringRef Name, const sys::TimePoint< std::chrono::seconds > &ModTime, unsigned UID, unsigned GID, unsigned Perms, unsigned Size)
raw_ostream & indent(unsigned NumSpaces)
indent - Insert &#39;NumSpaces&#39; spaces.
A raw_ostream that writes to an SmallVector or SmallString.
Definition: raw_ostream.h:504
Error takeError()
Take ownership of the stored error.
Definition: Error.h:545
static Expected< TempFile > create(const Twine &Model, unsigned Mode=all_read|all_write)
This creates a temporary file with createUniqueFile and schedules it for deletion with sys::RemoveFil...
Definition: Path.cpp:1201
Represents the result of a call to sys::fs::status().
Definition: FileSystem.h:229
Error writeArchive(StringRef ArcName, ArrayRef< NewArchiveMember > NewMembers, bool WriteSymtab, object::Archive::Kind Kind, bool Deterministic, bool Thin, std::unique_ptr< MemoryBuffer > OldArchiveBuf=nullptr)
void append(SmallVectorImpl< char > &path, const Twine &a, const Twine &b="", const Twine &c="", const Twine &d="")
Append to path.
Definition: Path.cpp:471
static bool is64BitKind(object::Archive::Kind Kind)
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
static Expected< std::vector< unsigned > > getSymbols(MemoryBufferRef Buf, raw_ostream &SymNames, bool &HasObject)
StringRef getBuffer() const
Definition: MemoryBuffer.h:277
std::error_code make_error_code(BitcodeError E)
bool is_absolute(const Twine &path, Style style=Style::native)
Is path absolute?
Definition: Path.cpp:679
Tagged union holding either a T or a Error.
Definition: CachePruning.h:23
StringRef str() const
Explicit conversion to StringRef.
Definition: SmallString.h:267
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:133
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:33
static void printGNUSmallMemberHeader(raw_ostream &Out, StringRef Name, const sys::TimePoint< std::chrono::seconds > &ModTime, unsigned UID, unsigned GID, unsigned Perms, unsigned Size)
static bool isBSDLike(object::Archive::Kind Kind)
void write(void *memory, value_type value, endianness endian)
Write a value to memory with a particular endianness.
Definition: Endian.h:100
Expected< sys::TimePoint< std::chrono::seconds > > getLastModified() const
Definition: Archive.h:117
size_t getBufferSize() const
Definition: MemoryBuffer.h:283
This is an important class for using LLVM in a threaded context.
Definition: LLVMContext.h:69
std::error_code status(const Twine &path, file_status &result, bool follow=true)
Get file status as if by POSIX stat().
static void printNBits(raw_ostream &Out, object::Archive::Kind Kind, uint64_t Val)
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
Error errorCodeToError(std::error_code EC)
Helper for converting an std::error_code to a Error.
Definition: Error.cpp:78
LLVM_ATTRIBUTE_ALWAYS_INLINE iterator begin()
Definition: SmallVector.h:124
std::error_code getError() const
Definition: ErrorOr.h:160
TimePoint getLastModificationTime() const
static sys::TimePoint< std::chrono::seconds > now(bool Deterministic)
Expected< unsigned > getUID() const
Definition: Archive.h:125
static void print(raw_ostream &Out, object::Archive::Kind Kind, T Val)
StringRef parent_path(StringRef path, Style style=Style::native)
Get parent path.
Definition: Path.cpp:482
static void printWithSpacePadding(raw_ostream &OS, T Data, unsigned Size)
void consumeError(Error Err)
Consume a Error without doing anything.
Definition: Error.h:970
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
raw_ostream & write(unsigned char C)
Expected< sys::fs::perms > getAccessMode() const
Definition: Archive.h:128
std::enable_if< std::numeric_limits< T >::is_signed, bool >::type getAsInteger(unsigned Radix, T &Result) const
Parse the current string as an integer of the specified radix.
Definition: StringRef.h:497
static Expected< std::vector< MemberData > > computeMemberData(raw_ostream &StringTable, raw_ostream &SymNames, object::Archive::Kind Kind, bool Thin, StringRef ArcName, ArrayRef< NewArchiveMember > NewMembers)
static bool useStringTable(bool Thin, StringRef Name)
reference get()
Returns a reference to the stored T value.
Definition: Error.h:525
static Expected< NewArchiveMember > getOldMember(const object::Archive::Child &OldMember, bool Deterministic)
This interface provides simple read-only access to a block of memory, and provides simple methods for...
Definition: MemoryBuffer.h:42
static bool isArchiveSymbol(const object::BasicSymbolRef &S)
Expected< MemoryBufferRef > getMemoryBufferRef() const
Definition: Archive.cpp:508
static MemberData computeStringTable(StringRef Names)
static void addToStringTable(raw_ostream &Out, StringRef ArcName, const NewArchiveMember &M, bool Thin)
LLVM_ATTRIBUTE_ALWAYS_INLINE iterator end()
Definition: SmallVector.h:128
uint32_t getFlags() const
Get symbol flags (bitwise OR of SymbolRef::Flags)
Definition: SymbolicFile.h:201
A raw_ostream that writes to a file descriptor.
Definition: raw_ostream.h:366
static void writeSymbolTable(raw_ostream &Out, object::Archive::Kind Kind, bool Deterministic, ArrayRef< MemberData > Members, StringRef StringTable)
LLVM_NODISCARD bool empty() const
Definition: SmallVector.h:56
static void printRestOfMemberHeader(raw_ostream &Out, const sys::TimePoint< std::chrono::seconds > &ModTime, unsigned UID, unsigned GID, unsigned Perms, unsigned Size)
This is a value type class that represents a single symbol in the list of symbols in the object file...
Definition: SymbolicFile.h:99
basic_symbol_iterator_range symbols() const
Definition: SymbolicFile.h:160
static Expected< NewArchiveMember > getFile(StringRef FileName, bool Deterministic)
const unsigned Kind
static std::string computeRelativePath(StringRef From, StringRef To)
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
A raw_ostream that writes to an std::string.
Definition: raw_ostream.h:477
constexpr char Size[]
Key for Kernel::Arg::Metadata::mSize.
Lightweight error class with error context and mandatory checking.
Definition: Error.h:156
uint64_t OffsetToAlignment(uint64_t Value, uint64_t Align)
Returns the offset to the next integer (mod 2**64) that is greater than or equal to Value and is a mu...
Definition: MathExtras.h:727
uint64_t tell() const
tell - Return the current offset with the file.
Definition: raw_ostream.h:100
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:46
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
static Expected< std::string > replace(StringRef S, StringRef From, StringRef To)
static void printMemberHeader(raw_ostream &Out, uint64_t Pos, raw_ostream &StringTable, object::Archive::Kind Kind, bool Thin, StringRef ArcName, const NewArchiveMember &M, unsigned Size)
static ErrorOr< std::unique_ptr< MemoryBuffer > > getOpenFile(int FD, const Twine &Filename, uint64_t FileSize, bool RequiresNullTerminator=true, bool IsVolatile=false)
Given an already-open file descriptor, read the file and return a MemoryBuffer.
std::unique_ptr< MemoryBuffer > Buf
Definition: ArchiveWriter.h:25
Expected< unsigned > getGID() const
Definition: Archive.h:126
Unrecognized file.
Definition: Magic.h:23
sys::TimePoint< std::chrono::seconds > ModTime
Definition: ArchiveWriter.h:27
std::chrono::time_point< std::chrono::system_clock, D > TimePoint
A time point on the system clock.
Definition: Chrono.h:34