Revert 91270 - sbox_unittests HandleTable.FindTable failing on Win XP & Vista

Had a bug in the handle table unit test. Added GetHandleName to fix the bug and make handle management easier.

TEST=sbox_unittests --gtest_filter=HandleTable.*


Review URL: http://codereview.chromium.org/7218066

TBR=jschuh@chromium.org
Review URL: http://codereview.chromium.org/7292028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@91271 0039d316-1c4b-4281-b951-d872f2087c98

sandbox/src/handle_table.cc

@@ -17,8 +17,6 @@ bool CompareHandleEntries(const SYSTEM_HANDLE_INFORMATION& a,
   return a.ProcessId < b.ProcessId;
 }
 
-static NtQueryObject QueryObject = NULL;
-
 }  // namespace
 
 namespace sandbox {
@@ -86,6 +84,7 @@ HandleTable::HandleEntry::HandleEntry(
 }
 
 void HandleTable::HandleEntry::UpdateInfo(UpdateType flag) {
+  static NtQueryObject QueryObject = NULL;
   if (!QueryObject)
     ResolveNTFunctionPtr("NtQueryObject", &QueryObject);
 
@@ -120,8 +119,18 @@ void HandleTable::HandleEntry::UpdateInfo(UpdateType flag) {
   switch (flag) {
     case UPDATE_INFO_AND_NAME:
       if (type_info_buffer_.size() && handle_name_.empty()) {
-        GetHandleName(reinterpret_cast<HANDLE>(handle_entry_->Handle),
-            &handle_name_);
+        ULONG size = MAX_PATH;
+        scoped_ptr<UNICODE_STRING> name;
+        do {
+          name.reset(reinterpret_cast<UNICODE_STRING*>(new BYTE[size]));
+          result = QueryObject(reinterpret_cast<HANDLE>(
+              handle_entry_->Handle), ObjectNameInformation, name.get(),
+              size, &size);
+        } while (result == STATUS_INFO_LENGTH_MISMATCH);
+
+        if (NT_SUCCESS(result)) {
+          handle_name_.assign(name->Buffer, name->Length / sizeof(wchar_t));
+        }
       }
       break;
 
@@ -135,27 +144,6 @@ void HandleTable::HandleEntry::UpdateInfo(UpdateType flag) {
   }
 }
 
-// Returns the object manager's name associated with a handle
-bool GetHandleName(HANDLE handle, string16* handle_name) {
-  if (!QueryObject)
-    ResolveNTFunctionPtr("NtQueryObject", &QueryObject);
-
-  ULONG size = MAX_PATH;
-  scoped_ptr<UNICODE_STRING> name;
-  NTSTATUS result;
-
-  do {
-    name.reset(reinterpret_cast<UNICODE_STRING*>(new BYTE[size]));
-    result = QueryObject(handle, ObjectNameInformation, name.get(),
-                         size, &size);
-  } while (result == STATUS_INFO_LENGTH_MISMATCH);
-
-  if (NT_SUCCESS(result))
-    handle_name->assign(name->Buffer, name->Length / sizeof(wchar_t));
-
-  return NT_SUCCESS(result);
-}
-
 const OBJECT_TYPE_INFORMATION* HandleTable::HandleEntry::TypeInfo() {
   UpdateInfo(UPDATE_INFO_ONLY);
   return type_info_buffer_.empty() ? NULL : type_info_internal();

sandbox/src/handle_table.h

@@ -155,10 +155,6 @@ class HandleTable {
   DISALLOW_COPY_AND_ASSIGN(HandleTable);
 };
 
-// Returns the object manager's name associated with a handle
-bool GetHandleName(HANDLE handle, string16* handle_name);
-
-
 }  // namespace sandbox
 
 #endif  // SANDBOX_SRC_HANDLE_TABLE_H_

sandbox/src/handle_table_unittest.cc

@@ -47,8 +47,6 @@ TEST(HandleTable, FindHandle) {
                              FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
                              OPEN_EXISTING, FILE_FLAG_DELETE_ON_CLOSE, NULL);
   EXPECT_NE(INVALID_HANDLE_VALUE, file);
-  string16 handle_name;
-  ASSERT_EQ(sandbox::GetHandleName(file, &handle_name), true);
 
   // Look for the handle in our process
   bool handle_found = false;
@@ -56,7 +54,7 @@ TEST(HandleTable, FindHandle) {
   for (HandleTable::Iterator it =
       handles.HandlesForProcess(::GetCurrentProcessId());
       it != handles.end(); ++it) {
-    if (it->IsType(HandleTable::kTypeFile) && it->Name() == handle_name) {
+    if (it->IsType(HandleTable::kTypeFile) && it->Name().compare(my_file)) {
       handle_found = true;
       break;
     }