Attempt to run python-stack_core_test

Test: presubmit
Bug: 185900237
Change-Id: I7c41545d4e1fbdeebd729615b5b12ee64ba6a8b9

scripts/Android.bp

@@ -51,8 +51,23 @@ python_test_host {
         "example_crashes.py",
         "stack_core.py",
     ],
+    data: [
+        ":llvm-tools",
+    ],
     libs: ["python-symbol"],
-    test_suites: ["general-tests"],
+    version: {
+        py2: {
+            enabled: false,
+            embedded_launcher: false,
+        },
+        py3: {
+            enabled: true,
+            embedded_launcher: false,
+        },
+    },
+    test_options: {
+        unit_test: true,
+    },
 }
 
 python_test_host {

scripts/symbol.py

@@ -24,6 +24,7 @@ import glob
 import os
 import platform
 import re
+import shutil
 import signal
 import subprocess
 import unittest
@@ -132,7 +133,9 @@ for sig in (signal.SIGABRT, signal.SIGINT, signal.SIGTERM):
 
 
 def ToolPath(tool, toolchain=None):
-  """Return a fully-qualified path to the specified tool"""
+  """Return a fully-qualified path to the specified tool, or just the tool if it's on PATH """
+  if shutil.which(tool) is not None:
+      return tool
   if not toolchain:
     toolchain = FindToolchain()
   return os.path.join(toolchain, tool)
@@ -431,14 +434,14 @@ def CallCppFilt(mangled_symbol):
   if mangled_symbol in _SYMBOL_DEMANGLING_CACHE:
     return _SYMBOL_DEMANGLING_CACHE[mangled_symbol]
 
-  # TODO: Replace with llvm-cxxfilt when available.
   global _CACHED_CXX_FILT
   if not _CACHED_CXX_FILT:
-    os_name = platform.system().lower()
+    toolchains = None
-    toolchains = glob.glob("%s/prebuilts/gcc/%s-*/host/*-linux-*/bin/*c++filt" %
+    # TODO(b/187231324) do not hard-code prebuilt version number below
-                           (ANDROID_BUILD_TOP, os_name))
+    if os.path.exists('./clang-r416183b/bin/llvm-cxxfilt'):
+      toolchains = ["./clang-r416183b/bin/llvm-cxxfilt"]
     if not toolchains:
-      raise Exception("Could not find gcc c++filt tool")
+      raise Exception("Could not find llvm-cxxfilt tool")
     _CACHED_CXX_FILT = sorted(toolchains)[-1]
 
   cmd = [_CACHED_CXX_FILT]