src/third_party/llvm-project/lldb/packages/Python/lldbsuite/test/functionalities/dead-strip/TestDeadStrip.py

"""
Test that breakpoint works correctly in the presence of dead-code stripping.
"""

from __future__ import print_function


import os
import time
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil


class DeadStripTestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
    @expectedFailureAll(debug_info="dwo", bugnumber="llvm.org/pr25087")
    @expectedFailureAll(
        oslist=["linux"],
        debug_info="gmodules",
        bugnumber="llvm.org/pr27865")
    # The -dead_strip linker option isn't supported on FreeBSD versions of ld.
    @skipIfFreeBSD
    def test(self):
        """Test breakpoint works correctly with dead-code stripping."""
        self.build()
        exe = self.getBuildArtifact("a.out")
        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)

        # Break by function name f1 (live code).
        lldbutil.run_break_set_by_symbol(
            self, "f1", num_expected_locations=1, module_name="a.out")

        # Break by function name f2 (dead code).
        lldbutil.run_break_set_by_symbol(
            self, "f2", num_expected_locations=0, module_name="a.out")

        # Break by function name f3 (live code).
        lldbutil.run_break_set_by_symbol(
            self, "f3", num_expected_locations=1, module_name="a.out")

        self.runCmd("run", RUN_SUCCEEDED)

        # The stop reason of the thread should be breakpoint (breakpoint #1).
        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
                    substrs=['stopped',
                             'a.out`f1',
                             'stop reason = breakpoint'])

        # The breakpoint should have a hit count of 1.
        self.expect("breakpoint list -f 1", BREAKPOINT_HIT_ONCE,
                    substrs=[' resolved, hit count = 1'])

        self.runCmd("continue")

        # The stop reason of the thread should be breakpoint (breakpoint #3).
        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
                    substrs=['stopped',
                             'a.out`f3',
                             'stop reason = breakpoint'])

        # The breakpoint should have a hit count of 1.
        self.expect("breakpoint list -f 3", BREAKPOINT_HIT_ONCE,
                    substrs=[' resolved, hit count = 1'])