Add printing the LC_LINKER_OPTION load command with llvm-objdump’s -private-headers.

Also corrected the name of the load command to not end in an ’S’ as well as corrected
the name of the MachO::linker_option_command struct and other places that had the
word option as plural which did not match the Mac OS X headers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224485 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Object/MachO.h

@@ -346,8 +346,8 @@ public:
   getSegmentLoadCommand(const LoadCommandInfo &L) const;
   MachO::segment_command_64
   getSegment64LoadCommand(const LoadCommandInfo &L) const;
-  MachO::linker_options_command
+  MachO::linker_option_command
-  getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const;
+  getLinkerOptionLoadCommand(const LoadCommandInfo &L) const;
   MachO::version_min_command
   getVersionMinLoadCommand(const LoadCommandInfo &L) const;
   MachO::dylib_command

include/llvm/Support/MachO.h

@@ -131,7 +131,7 @@ namespace llvm {
       LC_SOURCE_VERSION       = 0x0000002Au,
       LC_DYLIB_CODE_SIGN_DRS  = 0x0000002Bu,
       LC_ENCRYPTION_INFO_64   = 0x0000002Cu,
-      LC_LINKER_OPTIONS       = 0x0000002Du,
+      LC_LINKER_OPTION        = 0x0000002Du,
       LC_LINKER_OPTIMIZATION_HINT = 0x0000002Eu
     };
 
@@ -874,7 +874,7 @@ namespace llvm {
       uint32_t export_size;
     };
 
-    struct linker_options_command {
+    struct linker_option_command {
       uint32_t cmd;
       uint32_t cmdsize;
       uint32_t count;
@@ -1206,7 +1206,7 @@ namespace llvm {
       sys::swapByteOrder(C.datasize);
     }
 
-    inline void swapStruct(linker_options_command &C) {
+    inline void swapStruct(linker_option_command &C) {
       sys::swapByteOrder(C.cmd);
       sys::swapByteOrder(C.cmdsize);
       sys::swapByteOrder(C.count);

lib/MC/MachObjectWriter.cpp

@@ -418,7 +418,7 @@ void MachObjectWriter::WriteLinkeditLoadCommand(uint32_t Type,
 static unsigned ComputeLinkerOptionsLoadCommandSize(
   const std::vector<std::string> &Options, bool is64Bit)
 {
-  unsigned Size = sizeof(MachO::linker_options_command);
+  unsigned Size = sizeof(MachO::linker_option_command);
   for (unsigned i = 0, e = Options.size(); i != e; ++i)
     Size += Options[i].size() + 1;
   return RoundUpToAlignment(Size, is64Bit ? 8 : 4);
@@ -431,10 +431,10 @@ void MachObjectWriter::WriteLinkerOptionsLoadCommand(
   uint64_t Start = OS.tell();
   (void) Start;
 
-  Write32(MachO::LC_LINKER_OPTIONS);
+  Write32(MachO::LC_LINKER_OPTION);
   Write32(Size);
   Write32(Options.size());
-  uint64_t BytesWritten = sizeof(MachO::linker_options_command);
+  uint64_t BytesWritten = sizeof(MachO::linker_option_command);
   for (unsigned i = 0, e = Options.size(); i != e; ++i) {
     // Write each string, including the null byte.
     const std::string &Option = Options[i];

lib/Object/MachOObjectFile.cpp

@@ -2254,9 +2254,9 @@ MachOObjectFile::getSegment64LoadCommand(const LoadCommandInfo &L) const {
   return getStruct<MachO::segment_command_64>(this, L.Ptr);
 }
 
-MachO::linker_options_command
+MachO::linker_option_command
-MachOObjectFile::getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const {
+MachOObjectFile::getLinkerOptionLoadCommand(const LoadCommandInfo &L) const {
-  return getStruct<MachO::linker_options_command>(this, L.Ptr);
+  return getStruct<MachO::linker_option_command>(this, L.Ptr);
 }
 
 MachO::version_min_command

test/tools/llvm-objdump/X86/macho-private-headers.test

@@ -3,6 +3,8 @@
 // RUN:     | FileCheck %s -check-prefix=EXE
 // RUN: llvm-objdump -p %p/Inputs/dylibLoadKinds.macho-x86_64 \
 // RUN:     | FileCheck %s -check-prefix=LOAD
+// RUN: llvm-objdump -p %p/Inputs/linkerOption.macho-x86_64 \
+// RUN:     | FileCheck %s -check-prefix=LD_OPT
 
 CHECK: Mach header
 CHECK:       magic cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
@@ -366,3 +368,14 @@ LOAD:          name /usr/lib/foo4.dylib (offset 24)
 LOAD:       current version 0.0.0
 LOAD: compatibility version 0.0.0
 
+LD_OPT: Load command 4
+LD_OPT:      cmd LC_LINKER_OPTION
+LD_OPT:  cmdsize 24
+LD_OPT:    count 1
+LD_OPT:   string #1 -lc++
+LD_OPT: Load command 5
+LD_OPT:      cmd LC_LINKER_OPTION
+LD_OPT:  cmdsize 40
+LD_OPT:    count 2
+LD_OPT:   string #1 -framework
+LD_OPT:   string #2 Foundation

tools/llvm-objdump/MachODump.cpp

@@ -3644,6 +3644,36 @@ static void PrintEncryptionInfoCommand64(MachO::encryption_info_command_64 ec,
   outs() << "          pad " << ec.pad << "\n";
 }
 
+static void PrintLinkerOptionCommand(MachO::linker_option_command lo,
+                                     const char *Ptr) {
+  outs() << "     cmd LC_LINKER_OPTION\n";
+  outs() << " cmdsize " << lo.cmdsize;
+  if (lo.cmdsize < sizeof(struct MachO::linker_option_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "   count " << lo.count << "\n";
+  const char *string = Ptr + sizeof(struct MachO::linker_option_command);
+  uint32_t left = lo.cmdsize - sizeof(struct MachO::linker_option_command);
+  uint32_t i = 0;
+  while (left > 0) {
+    while (*string == '\0' && left > 0) {
+      string++;
+      left--;
+    }
+    if (left > 0) {
+      i++;
+      outs() << "  string #" << i << " " << format("%.*s\n", left, string);
+      uint32_t len = strnlen(string, left) + 1;
+      string += len;
+      left -= len;
+    }
+  }
+  if (lo.count != i)
+    outs() << "   count " << lo.count  << " does not match number of strings " << i
+           << "\n";
+}
+
 static void PrintDylibCommand(MachO::dylib_command dl, const char *Ptr) {
   if (dl.cmd == MachO::LC_ID_DYLIB)
     outs() << "          cmd LC_ID_DYLIB\n";
@@ -3797,6 +3827,9 @@ static void PrintLoadCommands(const MachOObjectFile *Obj, uint32_t ncmds,
     } else if (Command.C.cmd == MachO::LC_ENCRYPTION_INFO_64) {
       MachO::encryption_info_command_64 Ei = Obj->getEncryptionInfoCommand64(Command);
       PrintEncryptionInfoCommand64(Ei, Buf.size());
+    } else if (Command.C.cmd == MachO::LC_LINKER_OPTION) {
+      MachO::linker_option_command Lo = Obj->getLinkerOptionLoadCommand(Command);
+      PrintLinkerOptionCommand(Lo, Command.Ptr);
     } else if (Command.C.cmd == MachO::LC_LOAD_DYLIB ||
                Command.C.cmd == MachO::LC_ID_DYLIB ||
                Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||

tools/macho-dump/macho-dump.cpp

@@ -300,12 +300,12 @@ DumpDataInCodeDataCommand(const MachOObjectFile &Obj,
 static int
 DumpLinkerOptionsCommand(const MachOObjectFile &Obj,
                          const MachOObjectFile::LoadCommandInfo &LCI) {
-  MachO::linker_options_command LOLC = Obj.getLinkerOptionsLoadCommand(LCI);
+  MachO::linker_option_command LOLC = Obj.getLinkerOptionLoadCommand(LCI);
   outs() << "  ('count', " << LOLC.count << ")\n"
          << "  ('_strings', [\n";
 
-  uint64_t DataSize = LOLC.cmdsize - sizeof(MachO::linker_options_command);
+  uint64_t DataSize = LOLC.cmdsize - sizeof(MachO::linker_option_command);
-  const char *P = LCI.Ptr + sizeof(MachO::linker_options_command);
+  const char *P = LCI.Ptr + sizeof(MachO::linker_option_command);
   StringRef Data(P, DataSize);
   for (unsigned i = 0; i != LOLC.count; ++i) {
     std::pair<StringRef,StringRef> Split = Data.split('\0');
@@ -356,7 +356,7 @@ static int DumpLoadCommand(const MachOObjectFile &Obj,
     return DumpLinkeditDataCommand(Obj, LCI);
   case MachO::LC_DATA_IN_CODE:
     return DumpDataInCodeDataCommand(Obj, LCI);
-  case MachO::LC_LINKER_OPTIONS:
+  case MachO::LC_LINKER_OPTION:
     return DumpLinkerOptionsCommand(Obj, LCI);
   case MachO::LC_VERSION_MIN_IPHONEOS:
   case MachO::LC_VERSION_MIN_MACOSX: