[Lldb-commits] [PATCH] D18979: Fixes for platforms that default to unsigned char

[Ulrich Weigand via lldb-commits]

uweigand created this revision.
uweigand added reviewers: spyffe, clayborg.
uweigand added a subscriber: lldb-commits.
Herald added a subscriber: aemerson.

This fixes several test case failure on s390x caused by the fact that
on this platform, the default "char" type is unsigned.

- In ClangASTContext::GetBuiltinTypeForEncodingAndBitSize we should return
  an explicit *signed* char type for encoding eEncodingSint and bit size 8,
  instead of the default platform char type (which may be unsigned).
  This fix matches existing code in ClangASTContext::GetIntTypeFromBitSize,
  and fixes the TestClangASTContext.TestBuiltinTypeForEncodingAndBitSize
  unit test case.

- The test/expression_command/char/TestExprsChar.py test case is known to
  fail on platforms defaulting to unsigned char (pr23069), and just needs
  to be xfailed on s390x like on arm.

- The test/functionalities/watchpoint/watchpoint_on_vectors/main.c test
  case defines a vector of "char" and implicitly assumes to be signed.
  Use an explicit "signed char" instead.


http://reviews.llvm.org/D18979

Files:
  packages/Python/lldbsuite/test/expression_command/char/TestExprsChar.py
  packages/Python/lldbsuite/test/functionalities/watchpoint/watchpoint_on_vectors/main.c
  source/Symbol/ClangASTContext.cpp

Index: source/Symbol/ClangASTContext.cpp
===================================================================
--- source/Symbol/ClangASTContext.cpp
+++ source/Symbol/ClangASTContext.cpp
@@ -783,8 +783,8 @@
         break;
         
     case eEncodingSint:
-        if (QualTypeMatchesBitSize (bit_size, ast, ast->CharTy))
-            return CompilerType (ast, ast->CharTy);
+        if (QualTypeMatchesBitSize (bit_size, ast, ast->SignedCharTy))
+            return CompilerType (ast, ast->SignedCharTy);
         if (QualTypeMatchesBitSize (bit_size, ast, ast->ShortTy))
             return CompilerType (ast, ast->ShortTy);
         if (QualTypeMatchesBitSize (bit_size, ast, ast->IntTy))
Index: packages/Python/lldbsuite/test/functionalities/watchpoint/watchpoint_on_vectors/main.c
===================================================================
--- packages/Python/lldbsuite/test/functionalities/watchpoint/watchpoint_on_vectors/main.c
+++ packages/Python/lldbsuite/test/functionalities/watchpoint/watchpoint_on_vectors/main.c
@@ -6,7 +6,7 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-typedef char v4i8 __attribute__ ((vector_size(4)));
+typedef signed char v4i8 __attribute__ ((vector_size(4)));
 v4i8 global_vector = {1, 2, 3, 4};
 
 int
Index: packages/Python/lldbsuite/test/expression_command/char/TestExprsChar.py
===================================================================
--- packages/Python/lldbsuite/test/expression_command/char/TestExprsChar.py
+++ packages/Python/lldbsuite/test/expression_command/char/TestExprsChar.py
@@ -57,7 +57,7 @@
     def test_default_char(self):
         self.do_test()
 
-    @expectedFailureAll(archs=["arm", "aarch64"], bugnumber="llvm.org/pr23069")
+    @expectedFailureAll(archs=["arm", "aarch64", "s390x"], bugnumber="llvm.org/pr23069")
     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr21765")
     def test_signed_char(self):
         self.do_test(dictionary={'CFLAGS_EXTRAS': '-fsigned-char'})


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