[lldb] [Host/freebsd] Set Arg0 for 'platform process list -v'

[mgorny]

Summary

Same fix as in NetBSD (a6712889f5f1702dfa535718abe400d1a83174c5).

lldb/source/Host/freebsd/Host.cpp

else
     process_info.GetExecutableFile().SetFile(cstr, FileSpec::Style::native);
 
   if (!(match_info_ptr == NULL ||
         NameMatches(process_info.GetExecutableFile().GetFilename().GetCString(),
                     match_info_ptr->GetNameMatchType(),
                     match_info_ptr->GetProcessInfo().GetName())))
     return false;
 
+  process_info.SetArg0(cstr);
   Args &proc_args = process_info.GetArguments();
   while (1) {
     const uint8_t *p = data.PeekData(offset, 1);
     while ((p != NULL) && (*p == '\0') && offset < arg_data_size) {
       ++offset;
       p = data.PeekData(offset, 1);
     }
     if (p == NULL || offset >= arg_data_size)

lldb/test/API/commands/platform/process/list/TestProcessList.py

 class ProcessListTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipIfWindows  # https://bugs.llvm.org/show_bug.cgi?id=43702
     @skipIfRemote   # rdar://problem/66542336
-    @expectedFailureAll(oslist=['freebsd'])
     def test_process_list_with_args(self):
         """Test process list show process args"""
         self.build()
         exe = self.getBuildArtifact("TestProcess")
 
         # Spawn a new process
         popen = self.spawnSubprocess(exe, args=["arg1", "--arg2", "arg3"])
 
         substrs = [str(popen.pid), "TestProcess arg1 --arg2 arg3"]
 
         # Because LLDB isn't the one spawning the subprocess, the PID will be
         # different during replay.
         if configuration.is_reproducer_replay():
             substrs.pop(0)
 
         self.expect("platform process list -v", substrs=substrs)