[RuntimeDyld] Make sure we emit MachO __eh_frame and __gcc_except_tab sections,

even if there are no references to them in the code.

This allows exceptions thrown from JIT'd code to be caught by the JIT itself.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234975 91177308-0d34-0410-b5e6-96231b3b80d8

test/ExecutionEngine/RuntimeDyld/X86/MachO_x86-64_PIC_relocations.s

@@ -31,6 +31,13 @@ insn3:
         movl	$0, %eax
 	retq
 
+# Test processing of the __eh_frame section.
+# rtdyld-check: *{8}(section_addr(test_x86-64.o, __eh_frame) + 0x20) = eh_frame_test - (section_addr(test_x86-64.o, __eh_frame) + 0x20)
+eh_frame_test:
+        .cfi_startproc
+        retq
+        .cfi_endproc
+
         .comm   y,4,2
 
         .section	__DATA,__data