[Lldb-commits] [lldb] [lldb] Unwind through ARM Cortex-M exceptions automatically (PR #153922)

[David Spickett via lldb-commits]

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+"""
+Test that we can backtrace up an ARM Cortex-M Exception return stack
+"""
+
+import lldb
+import json
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestCortexMExceptionUnwind(TestBase):
+    NO_DEBUG_INFO_TESTCASE = True
+
+    def test_no_fpu(self):
+        """Test that we can backtrace correctly through an ARM Cortex-M Exception return stack"""
+
+        target = self.dbg.CreateTarget("")
+        exe = "binary.json"
+        f = open(exe)
+        exe_json = json.load(f)
+        exe_uuid = exe_json["uuid"]
+        f.close()
+        target.AddModule(exe, "", exe_uuid)
+        self.assertTrue(target.IsValid())
+
+        core = self.getBuildArtifact("core")
+        self.yaml2macho_core("armv7m-nofpu-exception.yaml", core, exe_uuid)
+
+        process = target.LoadCore(core)
+        self.assertTrue(process.IsValid())
+
+        if self.TraceOn():
+            self.runCmd("image list")
+            self.runCmd("target modules dump sections")
+            self.runCmd("target modules dump symtab")
+            self.runCmd("bt")
+
+        thread = process.GetThreadAtIndex(0)
+        self.assertTrue(thread.IsValid())
+
+        self.assertEqual(thread.GetNumFrames(), 6)
+        stackframe_names = [
+            "exception_catcher",
+            "exception_catcher",
+            "exception_thrower",
+            "main",
+        ]
+        for i in range(4):
----------------
DavidSpickett wrote:

`for i, name in enumerate(stackframe_names)`

https://github.com/llvm/llvm-project/pull/153922