Fix bug with $_SERVER['PHP_SELF']

Currently we have bug where $_SERVER['PHP_SELF'] is "" a script is invoked
at the command line without using "-f" or "--file".

This diff fixes the problem by making more places use the adjusted version
of argc/argv built using prepare_args(). This also allows us to get rid of
a old hack we've had for a long time for supporting running scripts without
using "-f" or "--file" at the command line.

Github issue 730: https://github.com/facebook/hiphop-php/issues/730

hphp/runtime/base/builtin_functions.cpp

@@ -1036,25 +1036,7 @@ Variant invoke_file(CStrRef s, bool once, const char *currentDir) {
   if (invoke_file_impl(r, s, once, currentDir)) {
     return r;
   }
-  if (!s.empty()) {
-    return throw_missing_file(s.c_str());
-  }
-  // The gross hack which follows is here so that "hhvm foo.php" works
-  // the same as "hhvm -f foo.php".
-  // TODO Task #2171414: Find a less hacky way to accomplish this; we probably
-  // should be handling this elsewhere at a higher level rather than within
-  // the bowels of the invoke/include machinery
-  SystemGlobals* g = (SystemGlobals*)get_global_variables();
-  Variant& v_argc = g->GV(argc);
-  Variant& v_argv = g->GV(argv);
-  if (!more(v_argc, int64_t(0))) {
-    return true;
-  }
-  String s2 = toString(v_argv.rvalAt(int64_t(0), AccessFlags::Error));
-  if (invoke_file_impl(r, s2, once, "")) {
-    return r;
-  }
-  return throw_missing_file(s2.c_str());
+  return throw_missing_file(s.c_str());
 }
 
 bool invoke_file_impl(Variant &res, CStrRef path, bool once,

hphp/runtime/base/program_functions.cpp

@@ -491,13 +491,17 @@ void execute_command_line_begin(int argc, char **argv, int xhprof) {
     now = time(nullptr);
     now_double = (double)now;
   }
+  String file = empty_string;
+  if (argc > 0) {
+    file = NEW(StringData)(argv[0], AttachLiteral);
+  }
   server.set(s_REQUEST_START_TIME, now);
   server.set(s_REQUEST_TIME, now);
   server.set(s_REQUEST_TIME_FLOAT, now_double);
   server.set(s_DOCUMENT_ROOT, empty_string);
-  server.set(s_SCRIPT_FILENAME, argv[0]);
-  server.set(s_SCRIPT_NAME, argv[0]);
-  server.set(s_PHP_SELF, argv[0]);
+  server.set(s_SCRIPT_FILENAME, file);
+  server.set(s_SCRIPT_NAME, file);
+  server.set(s_PHP_SELF, file);
   server.set(s_argv, g->GV(argv));
   server.set(s_argc, g->GV(argc));
   server.set(s_PWD, g_context->getCwd());
@@ -1031,13 +1035,18 @@ static int execute_program_impl(int argc, char **argv) {
 
     if (!po.file.empty()) {
       Repo::setCliFile(po.file);
-    } else if (new_argc >= 1) {
+    } else if (new_argc > 0) {
       Repo::setCliFile(new_argv[0]);
     }
 
     int ret = 0;
     hphp_process_init();
 
+    string file;
+    if (new_argc > 0) {
+      file = new_argv[0];
+    }
+
     if (po.mode == "debug") {
       StackTraceNoHeap::AddExtraLogging("IsDebugger", "True");
       RuntimeOption::EnableDebugger = true;
@@ -1049,7 +1058,6 @@ static int execute_program_impl(int argc, char **argv) {
       }
       Eval::Debugger::RegisterSandbox(proxy->getDummyInfo());
       Eval::Debugger::RegisterThread();
-      string file = po.file;
       StringVecPtr client_args;
       bool restart = false;
       ret = 0;
@@ -1081,10 +1089,10 @@ static int execute_program_impl(int argc, char **argv) {
       for (int i = 0; i < po.count; i++) {
         execute_command_line_begin(new_argc, new_argv, po.xhprofFlags);
         ret = 1;
-        if (hphp_invoke_simple(po.file)) {
+        if (hphp_invoke_simple(file)) {
           ret = ExitException::ExitCode;
         }
-        execute_command_line_end(po.xhprofFlags, true, new_argv[0]);
+        execute_command_line_end(po.xhprofFlags, true, file.c_str());
       }
     }
 
@@ -1296,9 +1304,10 @@ ExecutionContext *hphp_context_init() {
 
 bool hphp_invoke_simple(const std::string &filename,
                         bool warmupOnly /* = false */) {
-  bool error; string errorMsg;
-  return hphp_invoke(g_context.getNoCheck(), filename, false, null_array, uninit_null(),
-                     "", "", error, errorMsg, true, warmupOnly);
+  bool error;
+  string errorMsg;
+  return hphp_invoke(g_context.getNoCheck(), filename, false, null_array,
+                     uninit_null(), "", "", error, errorMsg, true, warmupOnly);
 }
 
 bool hphp_invoke(ExecutionContext *context, const std::string &cmd,