hanchenye-llvm-project/llvm/test/MC/MachO/bad-darwin-x86_64-reloc-exp...

// RUN: not llvm-mc -triple x86_64-apple-darwin10 %s -filetype=obj -o - 2> %t.err > %t
// RUN: FileCheck --check-prefix=CHECK-ERROR < %t.err %s

_Z:
.long (_a+4)-_Z
// CHECK-ERROR: error: unsupported relocation with subtraction expression, symbol '_a' can not be undefined in a subtraction expression
Fix a Mach-O assembler segfault for a subtraction expression with an undefined symbol. In a Mach-O object file a relocatable expression of the form SymbolA - SymbolB + constant is allowed when both symbols are defined in a section. But when either symbol is undefined it is an error. The code was crashing when it had an undefined symbol in this case. And should have printed a error message using the location information in the relocation entry. rdar://18678402 llvm-svn: 220599 2014-10-25 06:39:40 +08:00			`// RUN: not llvm-mc -triple x86_64-apple-darwin10 %s -filetype=obj -o - 2> %t.err > %t`
			`// RUN: FileCheck --check-prefix=CHECK-ERROR < %t.err %s`

			`_Z:`
			`.long (_a+4)-_Z`
			`// CHECK-ERROR: error: unsupported relocation with subtraction expression, symbol '_a' can not be undefined in a subtraction expression`