227 lines
8.2 KiB
Python
227 lines
8.2 KiB
Python
"""
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Test many basic expression commands and SBFrame.EvaluateExpression() API.
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Test cases:
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o test_many_expr_commands:
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Test many basic expression commands.
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o test_evaluate_expression_python:
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Use Python APIs (SBFrame.EvaluateExpression()) to evaluate expressions.
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o test_expr_commands_can_handle_quotes:
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Throw some expression commands with quotes at lldb.
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"""
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import unittest
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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 BasicExprCommandsTestCase(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 for main.c.
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self.line = line_number(
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"main.cpp", "// Please test many expressions while stopped at this line:"
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)
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# Disable confirmation prompt to avoid infinite wait
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self.runCmd("settings set auto-confirm true")
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self.addTearDownHook(lambda: self.runCmd("settings clear auto-confirm"))
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def build_and_run(self):
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"""These basic expression commands should work as expected."""
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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=False
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)
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self.runCmd("run", RUN_SUCCEEDED)
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# llvm.org/pr17135 <rdar://problem/14874559>
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# APFloat::toString does not identify the correct (i.e. least) precision.
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@unittest.expectedFailure
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def test_floating_point_expr_commands(self):
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self.build_and_run()
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self.expect("expression 2.234f", patterns=[r"\(float\) \$.* = 2\.234"])
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# (float) $2 = 2.234
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def test_many_expr_commands(self):
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self.build_and_run()
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self.expect_expr("2", result_type="int", result_value="2")
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self.expect_expr("2ull", result_type="unsigned long long", result_value="2")
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self.expect_expr("0.5f", result_type="float", result_value="0.5")
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self.expect_expr("2.234", result_type="double", result_value="2.234")
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self.expect_expr("2+3", result_type="int", result_value="5")
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self.expect_expr("argc", result_type="int", result_value="1")
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self.expect_expr("argc + 22", result_type="int", result_value="23")
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self.expect_expr("argv", result_type="const char **")
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self.expect("expression argv[0]", substrs=["(const char *)", "a.out"])
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# (const char *) $8 = 0x... "/Volumes/data/lldb/svn/trunk/test/expression_command/test/a.out"
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@add_test_categories(["pyapi"])
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@expectedFlakeyNetBSD
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def test_evaluate_expression_python(self):
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"""Test SBFrame.EvaluateExpression() API for evaluating an expression."""
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self.build()
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target = self.createTestTarget()
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# Create the breakpoint.
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filespec = lldb.SBFileSpec("main.cpp", False)
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breakpoint = target.BreakpointCreateByLocation(filespec, self.line)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Verify the breakpoint just created.
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self.expect(
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str(breakpoint),
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BREAKPOINT_CREATED,
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exe=False,
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substrs=["main.cpp", str(self.line)],
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)
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# Launch the process, and do not stop at the entry point.
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# Pass 'X Y Z' as the args, which makes argc == 4.
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process = target.LaunchSimple(
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["X", "Y", "Z"], None, self.get_process_working_directory()
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)
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if not process:
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self.fail("SBTarget.LaunchProcess() failed")
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if process.GetState() != lldb.eStateStopped:
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self.fail(
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"Process should be in the 'stopped' state, "
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"instead the actual state is: '%s'"
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% lldbutil.state_type_to_str(process.GetState())
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)
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thread = lldbutil.get_one_thread_stopped_at_breakpoint(process, breakpoint)
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self.assertIsNotNone(
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thread, "Expected one thread to be stopped at the breakpoint"
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)
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# The filename of frame #0 should be 'main.cpp' and function is main.
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self.expect(
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lldbutil.get_filenames(thread)[0],
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"Break correctly at main.cpp",
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exe=False,
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startstr="main.cpp",
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)
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self.expect(
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lldbutil.get_function_names(thread)[0],
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"Break correctly at main()",
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exe=False,
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startstr="main",
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)
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# We should be stopped on the breakpoint with a hit count of 1.
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self.assertEqual(breakpoint.GetHitCount(), 1, BREAKPOINT_HIT_ONCE)
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#
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# Use Python API to evaluate expressions while stopped in a stack frame.
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#
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frame = thread.GetFrameAtIndex(0)
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val = frame.EvaluateExpression("2.234")
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self.expect(
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val.GetValue(), "2.345 evaluated correctly", exe=False, startstr="2.234"
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)
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self.expect(
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val.GetTypeName(), "2.345 evaluated correctly", exe=False, startstr="double"
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)
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self.DebugSBValue(val)
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val = frame.EvaluateExpression("argc")
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self.expect(val.GetValue(), "Argc evaluated correctly", exe=False, startstr="4")
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self.DebugSBValue(val)
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val = frame.EvaluateExpression("*argv[1]")
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self.expect(
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val.GetValue(), "Argv[1] evaluated correctly", exe=False, startstr="'X'"
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)
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self.DebugSBValue(val)
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val = frame.EvaluateExpression("*argv[2]")
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self.expect(
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val.GetValue(), "Argv[2] evaluated correctly", exe=False, startstr="'Y'"
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)
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self.DebugSBValue(val)
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val = frame.EvaluateExpression("*argv[3]")
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self.expect(
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val.GetValue(), "Argv[3] evaluated correctly", exe=False, startstr="'Z'"
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)
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self.DebugSBValue(val)
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callee_break = target.BreakpointCreateByName("a_function_to_call", None)
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self.assertGreater(callee_break.GetNumLocations(), 0)
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# Make sure ignoring breakpoints works from the command line:
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self.expect(
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"expression -i true -- a_function_to_call()", substrs=["(int) $", " 1"]
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)
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self.assertEqual(callee_break.GetHitCount(), 1)
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# Now try ignoring breakpoints using the SB API's:
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options = lldb.SBExpressionOptions()
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options.SetIgnoreBreakpoints(True)
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value = frame.EvaluateExpression("a_function_to_call()", options)
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self.assertTrue(value.IsValid())
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self.assertEqual(value.GetValueAsSigned(0), 2)
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self.assertEqual(callee_break.GetHitCount(), 2)
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# rdar://problem/8686536
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# CommandInterpreter::HandleCommand is stripping \'s from input for
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# WantsRawCommand commands
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def test_expr_commands_can_handle_quotes(self):
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"""Throw some expression commands with quotes at lldb."""
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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=False
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)
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self.runCmd("run", RUN_SUCCEEDED)
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# runCmd: expression 'a'
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# output: (char) $0 = 'a'
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self.expect("expression 'a'", substrs=["(char) $", "'a'"])
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# runCmd: expression (int) printf ("\n\n\tHello there!\n")
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# output: (int) $1 = 16
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self.expect(
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r"""expression (int) printf ("\n\n\tHello there!\n")""",
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substrs=["(int) $", "16"],
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)
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# runCmd: expression (int) printf("\t\x68\n")
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# output: (int) $2 = 3
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self.expect(
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r"""expression (int) printf("\t\x68\n")""", substrs=["(int) $", "3"]
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)
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# runCmd: expression (int) printf("\"\n")
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# output: (int) $3 = 2
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self.expect(r"""expression (int) printf("\"\n")""", substrs=["(int) $", "2"])
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# runCmd: expression (int) printf("'\n")
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# output: (int) $4 = 2
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self.expect(r"""expression (int) printf("'\n")""", substrs=["(int) $", "2"])
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# runCmd: command alias print_hi expression (int) printf ("\n\tHi!\n")
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# output:
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self.runCmd(r"""command alias print_hi expression (int) printf ("\n\tHi!\n")""")
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# This fails currently.
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self.expect("print_hi", substrs=["(int) $", "6"])
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