Utility functions to interact with the NT loader's data structures and associated tests.

This is in preparation for squelching false positive crash reports during DLL load.

BUG=31980
TEST=Unittests in this change.

Review URL: http://codereview.chromium.org/882001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@41289 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 29 insertions, 0 deletions

diff --git a/chrome_frame/crash_reporting/nt_loader.cc b/chrome_frame/crash_reporting/nt_loader.cc
new file mode 100644
index 0000000..3e5a99a
--- /dev/null
+++ b/chrome_frame/crash_reporting/nt_loader.cc
@@ -0,0 +1,29 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#include "chrome_frame/crash_reporting/nt_loader.h"
+
+#include <winnt.h>
+#include <winternl.h>
+#include "base/logging.h"
+
+namespace nt_loader {
+
+LDR_DATA_TABLE_ENTRY* GetLoaderEntry(HMODULE module) {
+  // Make sure we own the loader's lock on entry here.
+  DCHECK(OwnsCriticalSection(GetLoaderLock()));
+  PEB* peb = GetCurrentPeb();
+
+  LIST_ENTRY* head = &peb->Ldr->InLoadOrderModuleList;
+  for (LIST_ENTRY* entry = head->Flink; entry != head; entry = entry->Flink) {
+    LDR_DATA_TABLE_ENTRY* ldr_entry =
+        CONTAINING_RECORD(entry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
+
+    if (reinterpret_cast<HMODULE>(ldr_entry->DllBase) == module)
+      return ldr_entry;
+  }
+
+  return NULL;
+}
+
+}  // namespace nt_loader