[dsymutil] Make the triple detection more strict.

MachOObjectFile offers a method for detecting the correct triple, use
it instead of the previous approximation. This doesn't matter right
now, but it will become important for mach-o universal (fat) binaries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243095 91177308-0d34-0410-b5e6-96231b3b80d8

test/tools/dsymutil/X86/frame-1.test

@@ -9,7 +9,7 @@
 # link twice the same file using this made-up debug map:
 
 ---
-triple:          'i386-unknown-unknown-macho'
+triple:          'i386-apple-darwin'
 objects:
   - filename: frame-dw2.o
     symbols:

test/tools/dsymutil/X86/frame-2.test

@@ -12,7 +12,7 @@
 # appears again. This is a behavior we inherited from dsymutil-classic
 # but this should be fixed (see comment in patchFrameInfoForObject())
 ---
-triple:          'i386-unknown-unknown-macho'
+triple:          'i386-apple-darwin'
 objects:
   - filename: frame-dw2.o
     symbols:

test/tools/dsymutil/X86/odr-1.test

@@ -14,7 +14,7 @@
 # Totally made up debug map to test ODR uniquing
 
 ---
-triple:          'x86_64-unknown-unknown-macho'
+triple:          'x86_64-apple-darwin'
 objects:
   - filename: odr1.o
     symbols:

test/tools/dsymutil/archive-timestamp.test

@@ -6,7 +6,7 @@
 # CHECK: warning: {{.*}}libbasic.a(basic3.macho.x86_64.o): {{[Nn]o}} such file
 
 ---
-triple:          'x86_64-unknown-unknown-macho'
+triple:          'x86_64-apple-darwin'
 objects:
   - filename:        '/Inputs/libbasic.a(basic2.macho.x86_64.o)'
     timestamp:       141869239

test/tools/dsymutil/debug-map-parsing.test

@@ -9,7 +9,7 @@ Check that We can parse the debug map of the basic executable.
 
 CHECK-NOT: error
 CHECK: ---
-CHECK: triple: 'x86_64-unknown-unknown-macho'
+CHECK: triple: 'x86_64-apple-darwin'
 CHECK: filename:{{.*}}/Inputs/basic1.macho.x86_64.o
 CHECK-DAG: sym: _main, objAddr: 0x0000000000000000, binAddr: 0x0000000100000EA0, size: 0x00000024
 CHECK: filename{{.*}}/Inputs/basic2.macho.x86_64.o
@@ -28,7 +28,7 @@ Check that we can parse the debug-map of the basic-lto executable
 
 CHECK-LTO-NOT: error
 CHECK-LTO: ---
-CHECK-LTO: triple: 'x86_64-unknown-unknown-macho'
+CHECK-LTO: triple: 'x86_64-apple-darwin'
 CHECK-LTO: /Inputs/basic-lto.macho.x86_64.o
 CHECK-LTO-DAG: 	sym: _bar, objAddr: 0x0000000000000050, binAddr: 0x0000000100000F90, size: 0x00000024
 CHECK-LTO-DAG: 	sym: _baz, objAddr: 0x0000000000000658, binAddr: 0x0000000100001000, size: 0x00000000
@@ -51,7 +51,7 @@ CHECK-ARCHIVE-NEXT: 	found member in current archive.
 CHECK-ARCHIVE-NEXT: trying to open {{.*}}/libbasic.a(basic3.macho.x86_64.o)'
 CHECK-ARCHIVE-NEXT: 	found member in current archive.
 CHECK-ARCHIVE: ---
-CHECK-ARCHIVE: triple: 'x86_64-unknown-unknown-macho'
+CHECK-ARCHIVE: triple: 'x86_64-apple-darwin'
 CHECK-ARCHIVE: /Inputs/basic1.macho.x86_64.o
 CHECK-ARCHIVE-DAG: 	sym: _main, objAddr: 0x0000000000000000, binAddr: 0x0000000100000EA0, size: 0x00000024
 CHECK-ARCHIVE: /Inputs/./libbasic.a(basic2.macho.x86_64.o)
@@ -72,7 +72,7 @@ NOT-FOUND: cannot open{{.*}}"/Inputs/basic1.macho.x86_64.o": {{[Nn]o}} such file
 NOT-FOUND: cannot open{{.*}}"/Inputs/basic2.macho.x86_64.o": {{[Nn]o}} such file
 NOT-FOUND: cannot open{{.*}}"/Inputs/basic3.macho.x86_64.o": {{[Nn]o}} such file
 NOT-FOUND: ---
-NOT-FOUND-NEXT: triple: 'x86_64-unknown-unknown-macho'
+NOT-FOUND-NEXT: triple: 'x86_64-apple-darwin'
 NOT-FOUND-NEXT: ...
 
 Check that we correctly error out on invalid executatble.

test/tools/dsymutil/yaml-object-address-rewrite.test

@@ -5,7 +5,7 @@
 # rewrite these addresses to the right values.
 #
 # CHECK: ---
-# CHECK-NEXT: triple:{{.*}}'x86_64-unknown-unknown-macho'
+# CHECK-NEXT: triple:{{.*}}'x86_64-apple-darwin'
 # CHECK-NEXT: objects:
 # CHECK-NEXT: filename:{{.*}}/Inputs/basic1.macho.x86_64.o
 # CHECK-NEXT: timestamp: 0
@@ -28,7 +28,7 @@
 # CHECK-NOT: { sym:
 # CHECK-NEXT: ...
 ---
-triple:          'x86_64-unknown-unknown-macho'
+triple:          'x86_64-apple-darwin'
 objects:
   - filename: /Inputs/basic1.macho.x86_64.o
     symbols:

tools/dsymutil/BinaryHolder.cpp

@@ -13,11 +13,21 @@
 //===----------------------------------------------------------------------===//
 
 #include "BinaryHolder.h"
+#include "llvm/Object/MachO.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace llvm {
 namespace dsymutil {
 
+Triple BinaryHolder::getTriple(const object::MachOObjectFile &Obj) {
+  // If a ThumbTriple is returned, use it instead of the standard
+  // one. This is because the thumb triple always allows to create a
+  // target, whereas the non-thumb one might not.
+  Triple ThumbTriple;
+  Triple T = Obj.getArch(nullptr, &ThumbTriple);
+  return ThumbTriple.getArch() ? ThumbTriple : T;
+}
+
 void BinaryHolder::changeBackingMemoryBuffer(
     std::unique_ptr<MemoryBuffer> &&Buf) {
   CurrentArchive.reset();

tools/dsymutil/BinaryHolder.h

@@ -14,6 +14,7 @@
 #ifndef LLVM_TOOLS_DSYMUTIL_BINARYHOLDER_H
 #define LLVM_TOOLS_DSYMUTIL_BINARYHOLDER_H
 
+#include "llvm/ADT/Triple.h"
 #include "llvm/Object/Archive.h"
 #include "llvm/Object/Error.h"
 #include "llvm/Object/ObjectFile.h"
@@ -108,6 +109,8 @@ public:
   template <typename ObjectFileType> const ObjectFileType &GetAs() {
     return cast<ObjectFileType>(*CurrentObjectFile);
   }
+
+  static Triple getTriple(const object::MachOObjectFile &Obj);
 };
 }
 }

tools/dsymutil/MachODebugMapParser.cpp

@@ -103,13 +103,6 @@ void MachODebugMapParser::switchToNewDebugMapObject(StringRef Filename,
   CurrentDebugMapObject = &Result->addDebugMapObject(Path, Timestamp);
 }
 
-static Triple getTriple(const object::MachOObjectFile &Obj) {
-  Triple TheTriple("unknown-unknown-unknown");
-  TheTriple.setArch(Triple::ArchType(Obj.getArch()));
-  TheTriple.setObjectFormat(Triple::MachO);
-  return TheTriple;
-}
-
 /// This main parsing routine tries to open the main binary and if
 /// successful iterates over the STAB entries. The real parsing is
 /// done in handleStabSymbolTableEntry.
@@ -120,7 +113,7 @@ ErrorOr<std::unique_ptr<DebugMap>> MachODebugMapParser::parse() {
 
   const MachOObjectFile &MainBinary = *MainBinOrError;
   loadMainBinarySymbols();
-  Result = make_unique<DebugMap>(getTriple(MainBinary));
+  Result = make_unique<DebugMap>(BinaryHolder::getTriple(MainBinary));
   MainBinaryStrings = MainBinary.getStringTableData();
   for (const SymbolRef &Symbol : MainBinary.symbols()) {
     const DataRefImpl &DRI = Symbol.getRawDataRefImpl();