[llvm-readobj] MachO -- dump LinkerOptions load command.

Example output:

Linker Options {
  Size: 32
  Count: 2
  Strings [
    Value: -framework
    Value: Cocoa
  ]
}

There were only two tests using this -- so I converted them as part of
this commit rather than separately.

Differential Revision:	 http://reviews.llvm.org/D12702


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247106 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 20 insertions, 0 deletions

diff --git a/tools/llvm-readobj/MachODumper.cpp b/tools/llvm-readobj/MachODumper.cpp
index fd6e00b9e83..177f79fb9c1 100644
--- a/tools/llvm-readobj/MachODumper.cpp
+++ b/tools/llvm-readobj/MachODumper.cpp
@@ -46,6 +46,7 @@ public:
   void printMachODysymtab() override;
   void printMachOSegment() override;
   void printMachOIndirectSymbols() override;
+  void printMachOLinkerOptions () override;
 
 private:
   template<class MachHeader>
@@ -791,3 +792,22 @@ void MachODumper::printMachOIndirectSymbols() {
     }
   }
 }
+
+void MachODumper::printMachOLinkerOptions() {
+  for (const auto &Load : Obj->load_commands()) {
+    if (Load.C.cmd == MachO::LC_LINKER_OPTION) {
+      MachO::linker_option_command LOLC = Obj->getLinkerOptionLoadCommand(Load);
+      DictScope Group(W, "Linker Options");
+      W.printNumber("Size", LOLC.cmdsize);
+      ListScope D(W, "Strings");
+      uint64_t DataSize = LOLC.cmdsize - sizeof(MachO::linker_option_command);
+      const char *P = Load.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');
+        W.printString("Value", Split.first);
+        Data = Split.second;
+      }
+    }
+  }
+}