From d0ae994498f1810c253c4acabe500ee74cdd3898 Mon Sep 17 00:00:00 2001
From: Hans Wennborg <hans@hanshq.net>
Date: Tue, 16 Jan 2018 15:29:26 +0000
Subject: Merging r321980:
 ------------------------------------------------------------------------
 r321980 | phosek | 2018-01-07 18:23:10 -0800 (Sun, 07 Jan 2018) | 5 lines

[llvm-readobj] Support -needed-libs option for Mach-O files

This implements the -needed-libs option in Mach-O dumper.

Differential Revision: https://reviews.llvm.org/D41527
------------------------------------------------------------------------


git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_60@322561 91177308-0d34-0410-b5e6-96231b3b80d8
---
 tools/llvm-readobj/MachODumper.cpp | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'tools')

diff --git a/tools/llvm-readobj/MachODumper.cpp b/tools/llvm-readobj/MachODumper.cpp
index 39e90927993..64178d7b33a 100644
--- a/tools/llvm-readobj/MachODumper.cpp
+++ b/tools/llvm-readobj/MachODumper.cpp
@@ -39,6 +39,8 @@ public:
   void printUnwindInfo() override;
   void printStackMap() const override;
 
+  void printNeededLibraries() override;
+
   // MachO-specific.
   void printMachODataInCode() override;
   void printMachOVersionMin() override;
@@ -675,6 +677,34 @@ void MachODumper::printStackMap() const {
                          StackMapV2Parser<support::big>(StackMapContentsArray));
 }
 
+void MachODumper::printNeededLibraries() {
+  ListScope D(W, "NeededLibraries");
+
+  using LibsTy = std::vector<StringRef>;
+  LibsTy Libs;
+
+  for (const auto &Command : Obj->load_commands()) {
+    if (Command.C.cmd == MachO::LC_LOAD_DYLIB ||
+        Command.C.cmd == MachO::LC_ID_DYLIB ||
+        Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
+        Command.C.cmd == MachO::LC_REEXPORT_DYLIB ||
+        Command.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
+        Command.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
+      MachO::dylib_command Dl = Obj->getDylibIDLoadCommand(Command);
+      if (Dl.dylib.name < Dl.cmdsize) {
+        auto *P = static_cast<const char*>(Command.Ptr) + Dl.dylib.name;
+        Libs.push_back(P);
+      }
+    }
+  }
+
+  std::stable_sort(Libs.begin(), Libs.end());
+
+  for (const auto &L : Libs) {
+    outs() << "  " << L << "\n";
+  }
+}
+
 void MachODumper::printMachODataInCode() {
   for (const auto &Load : Obj->load_commands()) {
     if (Load.C.cmd  == MachO::LC_DATA_IN_CODE) {
-- 
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