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import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class ExprFromNonZeroFrame(TestBase):
NO_DEBUG_INFO_TESTCASE = True
# Requires DWARF debug information.
@skipIfWindows
def test(self):
"""
Tests that we can use SBFrame::EvaluateExpression on a frame
that we're not stopped in, even if thread-plans run as part of
parsing the expression (e.g., when running static initializers).
"""
self.build()
(_, _, thread, _) = lldbutil.run_to_source_breakpoint(
self, "return 5", lldb.SBFileSpec("main.c")
)
frame = thread.GetFrameAtIndex(1)
# Using a function pointer inside the expression ensures we
# emit a ptrauth static initializer on arm64e into the JITted
# expression. The thread-plan that runs for this static
# initializer should save/restore the current execution context
# frame (which in this test is frame #1).
result = frame.EvaluateExpression("int (*fptr)() = &func; fptr()")
self.assertTrue(result.GetError().Success())
self.assertEqual(result.GetValueAsSigned(), 5)
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