TheRock/compiler/amd-llvm/lldb/test/API/lang/objc/objc-optimized/TestObjcOptimized.py

"""
Test that objective-c expression parser continues to work for optimized build.

Fixed a bug in the expression parser where the 'this'
or 'self' variable was not properly read if the compiler
optimized it into a register.
"""

import lldb
import re

from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil

# rdar://problem/9087739
# test failure: objc_optimized does not work for "-C clang -A i386"


@skipUnlessDarwin
class ObjcOptimizedTestCase(TestBase):
    myclass = "MyClass"
    mymethod = "description"
    method_spec = "-[%s %s]" % (myclass, mymethod)

    def test_break(self):
        """Test 'expr member' continues to work for optimized build."""
        self.build()
        exe = self.getBuildArtifact("a.out")
        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)

        lldbutil.run_break_set_by_symbol(
            self, self.method_spec, num_expected_locations=1, sym_exact=True
        )

        self.runCmd("run", RUN_SUCCEEDED)
        self.expect(
            "thread backtrace",
            STOPPED_DUE_TO_BREAKPOINT,
            substrs=["stop reason = breakpoint"],
            patterns=["frame.*0:.*%s %s" % (self.myclass, self.mymethod)],
        )

        self.expect("expression member", startstr="(int) $0 = 5")

        # <rdar://problem/12693963>
        interp = self.dbg.GetCommandInterpreter()
        result = lldb.SBCommandReturnObject()
        interp.HandleCommand("frame variable self", result)
        output = result.GetOutput()

        desired_pointer = "0x0"

        mo = re.search("0x[0-9a-f]+", output)

        if mo:
            desired_pointer = mo.group(0)

        # Use FixAddress to strip top-byte metadata (PtrAuth tags, MTE tags).
        process = self.dbg.GetSelectedTarget().GetProcess()
        desired_addr = process.FixAddress(int(desired_pointer, 16))

        self.expect(
            "expression (self)",
            substrs=["(%s *) $1 = " % self.myclass],
        )
        interp.HandleCommand("expression (self)", result)
        expr_output = result.GetOutput()
        mo = re.search("0x[0-9a-f]+", expr_output)
        self.assertTrue(mo, "Expected a pointer in expression output")
        expr_addr = process.FixAddress(int(mo.group(0), 16))
        self.assertEqual(desired_addr, expr_addr)

        self.expect(
            "expression self->non_member",
            error=True,
            substrs=["does not have a member named 'non_member'"],
        )