ff127624be
Change the default from 256 to 24. The argument is that 256 is too large to be scanned by eye, and too large to print in a terminal which can be only 40-50 lines in height. When all children must be shown, `frame variable` and `expression` both support the `-A` (`--show-all-children`) flag. rdar://145327522
100 lines
3.4 KiB
Python
100 lines
3.4 KiB
Python
"""
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Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs
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"""
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class SyntheticCappingTestCase(TestBase):
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Find the line number to break at.
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self.line = line_number("main.cpp", "// Set break point at this line.")
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def test_with_run_command(self):
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"""Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs."""
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self.build()
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self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
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lldbutil.run_break_set_by_file_and_line(
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self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True
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)
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self.runCmd("run", RUN_SUCCEEDED)
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process = self.dbg.GetSelectedTarget().GetProcess()
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# The stop reason of the thread should be breakpoint.
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self.expect(
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"thread list",
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STOPPED_DUE_TO_BREAKPOINT,
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substrs=["stopped", "stop reason = breakpoint"],
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)
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# This is the function to remove the custom formats in order to have a
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# clean slate for the next test case.
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def cleanup():
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self.runCmd("type format clear", check=False)
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self.runCmd("type summary clear", check=False)
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self.runCmd("type filter clear", check=False)
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self.runCmd("type synth clear", check=False)
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self.runCmd("settings set target.max-children-count 24", check=False)
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# Execute the cleanup function during test case tear down.
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self.addTearDownHook(cleanup)
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# set up the synthetic children provider
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self.runCmd("script from fooSynthProvider import *")
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self.runCmd("type synth add -l fooSynthProvider foo")
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# note that the value of fake_a depends on target byte order
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if process.GetByteOrder() == lldb.eByteOrderLittle:
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fake_a_val = 0x02000000
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else:
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fake_a_val = 0x00000100
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# check that the synthetic children work, so we know we are doing the
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# right thing
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self.expect(
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"frame variable f00_1",
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substrs=[
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"a = 1",
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"fake_a = %d" % fake_a_val,
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"r = 34",
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],
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)
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# num_children() should be called with at most max_num_children=25
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# (target.max-children-count + 1)
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self.expect(
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"script fooSynthProvider.reset_max_num_children_max()", substrs=["25"]
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)
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# check that capping works
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self.runCmd("settings set target.max-children-count 2", check=False)
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self.expect(
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"frame variable f00_1",
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substrs=[
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"a = 1",
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"fake_a = %d" % fake_a_val,
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"...",
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],
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)
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self.expect(
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"script fooSynthProvider.reset_max_num_children_max()", substrs=["3"]
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)
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self.expect("frame variable f00_1", matching=False, substrs=["r = 34"])
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self.runCmd("settings set target.max-children-count 256", check=False)
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self.expect("frame variable f00_1", matching=True, substrs=["r = 34"])
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self.expect(
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"script fooSynthProvider.reset_max_num_children_max()", substrs=["257"]
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)
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