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"""
Test SB API support for identifying artificial (tail call) frames.
"""
import lldb
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
class TestTailCallFrameSBAPI(TestBase):
mydir = TestBase.compute_mydir(__file__)
@skipIf(compiler="clang", compiler_version=['<', '8.0'])
@skipIf(dwarf_version=['<', '4'])
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr26265")
def test_tail_call_frame_sbapi(self):
self.build()
self.do_test()
def do_test(self):
exe = self.getBuildArtifact("a.out")
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateBySourceRegex("break here",
lldb.SBFileSpec("main.cpp"))
self.assertTrue(breakpoint and
breakpoint.GetNumLocations() == 1,
VALID_BREAKPOINT)
error = lldb.SBError()
launch_info = lldb.SBLaunchInfo(None)
process = target.Launch(launch_info, error)
self.assertTrue(process, PROCESS_IS_VALID)
# Did we hit our breakpoint?
threads = lldbutil.get_threads_stopped_at_breakpoint(process,
breakpoint)
self.assertEqual(
len(threads), 1,
"There should be a thread stopped at our breakpoint")
self.assertEqual(breakpoint.GetHitCount(), 1)
thread = threads[0]
# Here's what we expect to see in the backtrace:
# frame #0: ... a.out`sink() at main.cpp:13:4 [opt]
# frame #1: ... a.out`func3() at main.cpp:14:1 [opt] [artificial]
# frame #2: ... a.out`func2() at main.cpp:18:62 [opt]
# frame #3: ... a.out`func1() at main.cpp:18:85 [opt] [artificial]
# frame #4: ... a.out`main at main.cpp:23:3 [opt]
names = ["sink", "func3", "func2", "func1", "main"]
artificiality = [False, True, False, True, False]
for idx, (name, is_artificial) in enumerate(zip(names, artificiality)):
frame = thread.GetFrameAtIndex(idx)
# Use a relaxed substring check because function dislpay names are
# platform-dependent. E.g we see "void sink(void)" on Windows, but
# "sink()" on Darwin. This seems like a bug -- just work around it
# for now.
self.assertTrue(name in frame.GetDisplayFunctionName())
self.assertEqual(frame.IsArtificial(), is_artificial)
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