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