private void failTest(EmulatorTestRunner testRunner, String msg) {
		log(testRunner.getTestGroup(), msg);
		checkInstructionDecodeFailure(testRunner);
		fail(msg);
	}
Get symbol name which defines initial stack pointer offset
@return stack symbol or null
Ghidra/Features/Base/src/main/java/ghidra/test/processors/support/ProcessorEmulatorTestAdapter.java