[Lldb-commits] [lldb] [lldb][debugserver] Read/write SME registers on arm64 (PR #119171)
Jonas Devlieghere via lldb-commits
lldb-commits at lists.llvm.org
Thu Dec 12 09:20:39 PST 2024
================
@@ -0,0 +1,163 @@
+import lldb
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.decorators import *
+import lldbsuite.test.lldbutil as lldbutil
+import os
+
+
+class TestSMERegistersDarwin(TestBase):
+ NO_DEBUG_INFO_TESTCASE = True
+ mydir = TestBase.compute_mydir(__file__)
+
+ @skipIfRemote
+ @skipUnlessDarwin
+ @skipUnlessFeature("hw.optional.arm.FEAT_SME")
+ @skipUnlessFeature("hw.optional.arm.FEAT_SME2")
+ # thread_set_state/thread_get_state only avail in macOS 15.4+
+ @skipIf(macos_version=["<", "15.4"])
+ def test(self):
+ """Test that we can read the contents of the SME/SVE registers on Darwin"""
+ self.build()
+ (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
+ self, "break here", lldb.SBFileSpec("main.c")
+ )
+ frame = thread.GetFrameAtIndex(0)
+ self.assertTrue(frame.IsValid())
+
+ if self.TraceOn():
+ self.runCmd("reg read -a")
+
+ svl_reg = frame.register["svl"]
+ svl = svl_reg.GetValueAsUnsigned()
+
+ # SSVE and SME modes should be enabled (reflecting PSTATE.SM and PSTATE.ZA)
+ svcr = frame.register["svcr"]
+ self.assertEqual(svcr.GetValueAsUnsigned(), 3)
+
+ z0 = frame.register["z0"]
+ self.assertEqual(z0.GetNumChildren(), svl)
+ self.assertEqual(z0.GetChildAtIndex(0).GetValueAsUnsigned(), 0x1)
+ self.assertEqual(z0.GetChildAtIndex(svl - 1).GetValueAsUnsigned(), 0x1)
+
+ z31 = frame.register["z31"]
+ self.assertEqual(z31.GetNumChildren(), svl)
+ self.assertEqual(z31.GetChildAtIndex(0).GetValueAsUnsigned(), 32)
+ self.assertEqual(z31.GetChildAtIndex(svl - 1).GetValueAsUnsigned(), 32)
+
+ p0 = frame.register["p0"]
+ self.assertEqual(p0.GetNumChildren(), svl / 8)
+ self.assertEqual(p0.GetChildAtIndex(0).GetValueAsUnsigned(), 0xFF)
+ self.assertEqual(
+ p0.GetChildAtIndex(p0.GetNumChildren() - 1).GetValueAsUnsigned(), 0xFF
+ )
+
+ p15 = frame.register["p15"]
+ self.assertEqual(p15.GetNumChildren(), svl / 8)
+ self.assertEqual(p15.GetChildAtIndex(0).GetValueAsUnsigned(), 0xFF)
+ self.assertEqual(
+ p15.GetChildAtIndex(p15.GetNumChildren() - 1).GetValueAsUnsigned(), 0xFF
+ )
+
+ za = frame.register["za"]
+ self.assertEqual(za.GetNumChildren(), (svl * svl))
+ za_0 = za.GetChildAtIndex(0)
+ self.assertEqual(za_0.GetValueAsUnsigned(), 4)
+ za_final = za.GetChildAtIndex(za.GetNumChildren() - 1)
+ self.assertEqual(za_final.GetValueAsUnsigned(), 67)
+
+ zt0 = frame.register["zt0"]
+ self.assertEqual(zt0.GetNumChildren(), 64)
+ zt0_0 = zt0.GetChildAtIndex(0)
+ self.assertEqual(zt0_0.GetValueAsUnsigned(), 0)
+ zt0_final = zt0.GetChildAtIndex(63)
+ self.assertEqual(zt0_final.GetValueAsUnsigned(), 63)
+
+ z0_old_values = []
----------------
JDevlieghere wrote:
Not sure if this code changed since David's comment, but there's a lot of code duplication here. Seems like a little helper function could eliminate most of it without hurting debuggability?
https://github.com/llvm/llvm-project/pull/119171
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