Add to llvm-objdump the -no-leading-headers option with the use of the -macho option.

In some cases the leading headers of the file name, archive member and
architecture slice name in the output of lvm-objdump is not wanted so the
tool’s output can be directly used by scripts.  This matches the -X option
of the Apple otool(1) program.

rdar://28491674

llvm-svn: 288199

2 files changed, 15 insertions, 6 deletions

diff --git a/llvm/test/tools/llvm-objdump/X86/macho-dylib.test b/llvm/test/tools/llvm-objdump/X86/macho-dylib.test
index 0e31b8b930e..fd6ca80c58b 100644
--- a/llvm/test/tools/llvm-objdump/X86/macho-dylib.test
+++ b/llvm/test/tools/llvm-objdump/X86/macho-dylib.test
@@ -1,6 +1,10 @@
 RUN: llvm-objdump -m -dylibs-used %p/Inputs/hello.exe.macho-x86_64 | FileCheck %s -check-prefix=USED
 RUN: llvm-objdump -m -dylib-id %p/Inputs/dylibLoadKinds.macho-x86_64 | FileCheck %s -check-prefix=ID
+RUN: llvm-objdump -m -dylib-id -no-leading-headers %p/Inputs/dylibLoadKinds.macho-x86_64 | FileCheck %s -check-prefix=IDNOHEADERS
 
 USED: /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)
 
 ID: /usr/lib/foo.dylib
+
+IDNOHEADERS-NOT: dylibLoadKinds.macho-x86_64:
+IDNOHEADERS: /usr/lib/foo.dylib
diff --git a/llvm/tools/llvm-objdump/MachODump.cpp b/llvm/tools/llvm-objdump/MachODump.cpp
index 4e5241c5c50..b196170d4f7 100644
--- a/llvm/tools/llvm-objdump/MachODump.cpp
+++ b/llvm/tools/llvm-objdump/MachODump.cpp
@@ -71,6 +71,9 @@ static cl::opt<bool> FullLeadingAddr("full-leading-addr",
 static cl::opt<bool> NoLeadingAddr("no-leading-addr",
                                    cl::desc("Print no leading address"));
 
+static cl::opt<bool> NoLeadingHeaders("no-leading-headers",
+                                      cl::desc("Print no leading headers"));
+
 cl::opt<bool> llvm::UniversalHeaders("universal-headers",
                                      cl::desc("Print Mach-O universal headers "
                                               "(requires -macho)"));
@@ -1190,12 +1193,14 @@ static void ProcessMachO(StringRef Name, MachOObjectFile *MachOOF,
   if (Disassemble || PrivateHeaders || ExportsTrie || Rebase || Bind || SymbolTable ||
       LazyBind || WeakBind || IndirectSymbols || DataInCode || LinkOptHints ||
       DylibsUsed || DylibId || ObjcMetaData || (FilterSections.size() != 0)) {
-    outs() << Name;
-    if (!ArchiveMemberName.empty())
-      outs() << '(' << ArchiveMemberName << ')';
-    if (!ArchitectureName.empty())
-      outs() << " (architecture " << ArchitectureName << ")";
-    outs() << ":\n";
+    if (!NoLeadingHeaders) {
+      outs() << Name;
+      if (!ArchiveMemberName.empty())
+        outs() << '(' << ArchiveMemberName << ')';
+      if (!ArchitectureName.empty())
+        outs() << " (architecture " << ArchitectureName << ")";
+      outs() << ":\n";
+    }
   }
   // To use the report_error() form with an ArchiveName and FileName set
   // these up based on what is passed for Name and ArchiveMemberName.