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import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
import re
class LibCxxInternalsRecognizerTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
@add_test_categories(["libc++"])
@skipIf(compiler="clang", compiler_version=["<", "16.0"])
def test_frame_recognizer(self):
"""Test that implementation details of libc++ are hidden"""
self.build()
(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
self, "break here", lldb.SBFileSpec("main.cpp")
)
expected_parents = {
"sort_less(int, int)": ["::sort", "test_algorithms"],
# `std::ranges::sort` is implemented as an object of types `__sort`.
# We never hide the frame of the entry-point into the standard library, even
# if the name starts with `__` which usually indicates an internal function.
"ranges_sort_less(int, int)": [
re.compile("ranges::__sort::(__fn::)?operator\(\)"),
"test_algorithms",
],
# `ranges::views::transform` internally uses `std::invoke`, and that
# call also shows up in the stack trace
"view_transform(int)": [
"::invoke",
"ranges::transform_view",
"test_algorithms",
],
# Various types of `invoke` calls
"consume_number(int)": ["::invoke", "test_invoke"],
"invoke_add(int, int)": ["::invoke", "test_invoke"],
"Callable::member_function(int) const": ["::invoke", "test_invoke"],
"Callable::operator()(int) const": ["::invoke", "test_invoke"],
# Containers
"MyKey::operator<(MyKey const&) const": [
"less",
"::emplace",
"test_containers",
],
}
stop_set = set()
while process.GetState() != lldb.eStateExited:
fn = thread.GetFrameAtIndex(0).GetFunctionName()
stop_set.add(fn)
self.assertIn(fn, expected_parents.keys())
frame_id = 1
for expected_parent in expected_parents[fn]:
# Skip all hidden frames
while (
frame_id < thread.GetNumFrames()
and thread.GetFrameAtIndex(frame_id).IsHidden()
):
frame_id = frame_id + 1
# Expect the correct parent frame
func_name = thread.GetFrameAtIndex(frame_id).GetFunctionName()
if isinstance(expected_parent, re.Pattern):
self.assertTrue(
expected_parent.search(func_name) is not None,
f"'{expected_parent}' not found in '{func_name}'"
)
else:
self.assertIn(expected_parent, func_name)
frame_id = frame_id + 1
process.Continue()
# Make sure that we actually verified all intended scenarios
self.assertEqual(len(stop_set), len(expected_parents))
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