Add a test case to check that eax's content equals the lower half of rax.

Plus fix the test class name as well as wrong directory path.

llvm-svn: 157277

lldb/test/functionalities/register/TestRegisters.py

@@ -1,5 +1,5 @@
 """
-Test the 'memory read' command.
+Test the 'register' command.
 """
 
 import os, time
@@ -8,16 +8,24 @@ import unittest2
 import lldb
 from lldbtest import *
 
-class MemoryReadTestCase(TestBase):
+class RegisterCommandsTestCase(TestBase):
 
-    mydir = os.path.join("functionalities", "memory", "read")
+    mydir = os.path.join("functionalities", "register")
 
-    @unittest2.skipUnless(os.uname()[4] in ['x86_64'], "requires x86_64")
     def test_register_commands(self):
         """Test commands related to registers, in particular xmm registers."""
+        if not self.getArchitecture() in ['i386', 'x86_64']:
+            self.skipTest("This test requires i386 or x86_64 as the architecture for the inferior")
         self.buildDefault()
         self.register_commands()
 
+    def test_convenience_registers(self):
+        """Test convenience registers."""
+        if not self.getArchitecture() in ['x86_64']:
+            self.skipTest("This test requires x86_64 as the architecture for the inferior")
+        self.buildDefault()
+        self.convenience_registers()
+
     def register_commands(self):
         """Test commands related to registers, in particular xmm registers."""
         exe = os.path.join(os.getcwd(), "a.out")
@@ -47,6 +55,30 @@ class MemoryReadTestCase(TestBase):
         self.expect("expr (unsigned int)$xmm0[0]",
             substrs = ['unsigned int'])
 
+    def convenience_registers(self):
+        """Test convenience registers."""
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
+
+        # Break in main().
+        self.expect("breakpoint set -n main",
+                    BREAKPOINT_CREATED,
+            startstr = "Breakpoint created: 1: name = 'main'")
+
+        self.runCmd("run", RUN_SUCCEEDED)
+
+        # The stop reason of the thread should be breakpoint.
+        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+            substrs = ['stopped', 'stop reason = breakpoint'])
+
+        # Test reading of rax and eax.
+        self.runCmd("register read rax eax")
+
+        # No write rax with a unique bit pattern and test that eax indeed represents the lower half of rax.
+        self.runCmd("register write rax 0x1234567887654321")
+        self.expect("expr -- ($rax & 0xffffffff) == $eax",
+            substrs = ['true'])
+
 
 if __name__ == '__main__':
     import atexit