Revert 241548 "Chrome browser process DLL blacklist."

trunk/src/chrome_elf/blacklist/blacklist_interceptions.cc

Index: trunk/src/chrome_elf/blacklist/blacklist_interceptions.cc
===================================================================
--- trunk/src/chrome_elf/blacklist/blacklist_interceptions.cc	(revision 241567)
+++ trunk/src/chrome_elf/blacklist/blacklist_interceptions.cc	(working copy)
@@ -1,226 +0,0 @@
-// Copyright 2013 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.
-//
-// Implementation of NtMapViewOfSection intercept for 32 bit builds.
-//
-// TODO(robertshield): Implement the 64 bit intercept.
-
-#include "chrome_elf/blacklist/blacklist_interceptions.h"
-
-#include <string>
-#include <vector>
-
-// Note that only #includes from base that are either header-only or built into
-// base_static (see base/base.gyp) are allowed here.
-#include "base/basictypes.h"
-#include "base/strings/string16.h"
-#include "base/win/pe_image.h"
-#include "chrome_elf/blacklist/blacklist.h"
-#include "sandbox/win/src/internal_types.h"
-#include "sandbox/win/src/nt_internals.h"
-#include "sandbox/win/src/sandbox_nt_util.h"
-#include "sandbox/win/src/sandbox_types.h"
-
-namespace {
-
-NtQuerySectionFunction g_nt_query_section_func = NULL;
-NtQueryVirtualMemoryFunction g_nt_query_virtual_memory_func = NULL;
-NtUnmapViewOfSectionFunction g_nt_unmap_view_of_section_func = NULL;
-
-// TODO(robertshield): Merge with ntdll exports cache.
-FARPROC GetNtDllExportByName(const char* export_name) {
-  HMODULE ntdll = ::GetModuleHandle(sandbox::kNtdllName);
-  return ::GetProcAddress(ntdll, export_name);
-}
-
-bool DllMatch(const string16& module_name) {
-  for (int i = 0; i < blacklist::g_troublesome_dlls_cur_index; ++i) {
-    if (module_name == blacklist::g_troublesome_dlls[i])
-      return true;
-  }
-  return false;
-}
-
-// TODO(robertshield): Some of the helper functions below overlap somewhat with
-// code in sandbox_nt_util.cc. See if they can be unified.
-
-// Native reimplementation of PSAPIs GetMappedFileName.
-string16 GetBackingModuleFilePath(PVOID address) {
-  DCHECK_NT(g_nt_query_virtual_memory_func);
-
-  // We'll start with something close to max_path characters for the name.
-  ULONG buffer_bytes = MAX_PATH * 2;
-  std::vector<BYTE> buffer_data(buffer_bytes);
-
-  for (;;) {
-    MEMORY_SECTION_NAME* section_name =
-        reinterpret_cast<MEMORY_SECTION_NAME*>(&buffer_data[0]);
-
-    if (!section_name)
-      break;
-
-    ULONG returned_bytes;
-    NTSTATUS ret = g_nt_query_virtual_memory_func(
-        NtCurrentProcess, address, MemorySectionName, section_name,
-        buffer_bytes, &returned_bytes);
-
-    if (STATUS_BUFFER_OVERFLOW == ret) {
-      // Retry the call with the given buffer size.
-      buffer_bytes = returned_bytes + 1;
-      buffer_data.resize(buffer_bytes);
-      section_name = NULL;
-      continue;
-    }
-    if (!NT_SUCCESS(ret))
-      break;
-
-    UNICODE_STRING* section_string =
-        reinterpret_cast<UNICODE_STRING*>(section_name);
-    return string16(section_string->Buffer,
-                        section_string->Length / sizeof(wchar_t));
-  }
-
-  return string16();
-}
-
-bool IsModuleValidImageSection(HANDLE section,
-                               PVOID *base,
-                               PLARGE_INTEGER offset,
-                               PSIZE_T view_size) {
-  DCHECK_NT(g_nt_query_section_func);
-
-  if (!section || !base || !view_size || offset)
-    return false;
-
-  SECTION_BASIC_INFORMATION basic_info;
-  SIZE_T bytes_returned;
-  NTSTATUS ret = g_nt_query_section_func(section, SectionBasicInformation,
-                                         &basic_info, sizeof(basic_info),
-                                         &bytes_returned);
-
-  if (!NT_SUCCESS(ret) || sizeof(basic_info) != bytes_returned)
-    return false;
-
-  if (!(basic_info.Attributes & SEC_IMAGE))
-    return false;
-
-  return true;
-}
-
-string16 ExtractLoadedModuleName(const string16& module_path) {
-  if (module_path.empty() || module_path[module_path.size() - 1] == L'\\')
-    return string16();
-
-  size_t sep = module_path.find_last_of(L'\\');
-  if (sep == string16::npos)
-    return module_path;
-  else
-    return module_path.substr(sep+1);
-}
-
-// Fills |out_name| with the image name from the given |pe| image and |flags|
-// with additional info about the image.
-void SafeGetImageInfo(const base::win::PEImage& pe,
-                      std::string* out_name,
-                      uint32* flags) {
-  out_name->clear();
-  out_name->reserve(MAX_PATH);
-  *flags = 0;
-  __try {
-    if (pe.VerifyMagic()) {
-      *flags |= sandbox::MODULE_IS_PE_IMAGE;
-
-      PIMAGE_EXPORT_DIRECTORY exports = pe.GetExportDirectory();
-      if (exports) {
-        char* image_name = reinterpret_cast<char*>(pe.RVAToAddr(exports->Name));
-        size_t i = 0;
-        for (; i < MAX_PATH && *image_name; ++i, ++image_name)
-          out_name->push_back(*image_name);
-      }
-
-      PIMAGE_NT_HEADERS headers = pe.GetNTHeaders();
-      if (headers) {
-        if (headers->OptionalHeader.AddressOfEntryPoint)
-          *flags |= sandbox::MODULE_HAS_ENTRY_POINT;
-        if (headers->OptionalHeader.SizeOfCode)
-          *flags |= sandbox::MODULE_HAS_CODE;
-      }
-    }
-  } __except(GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION ?
-             EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) {
-    out_name->clear();
-  }
-}
-
-string16 GetImageInfoFromLoadedModule(HMODULE module, uint32* flags) {
-  std::string out_name;
-  base::win::PEImage pe(module);
-  SafeGetImageInfo(pe, &out_name, flags);
-  return string16(out_name.begin(), out_name.end());
-}
-
-}  // namespace
-
-namespace blacklist {
-
-bool InitializeInterceptImports() {
-  g_nt_query_section_func = reinterpret_cast<NtQuerySectionFunction>(
-          GetNtDllExportByName("NtQuerySection"));
-  g_nt_query_virtual_memory_func =
-      reinterpret_cast<NtQueryVirtualMemoryFunction>(
-          GetNtDllExportByName("NtQueryVirtualMemory"));
-  g_nt_unmap_view_of_section_func =
-      reinterpret_cast<NtUnmapViewOfSectionFunction>(
-          GetNtDllExportByName("NtUnmapViewOfSection"));
-
-  return g_nt_query_section_func && g_nt_query_virtual_memory_func &&
-         g_nt_unmap_view_of_section_func;
-}
-
-SANDBOX_INTERCEPT NTSTATUS WINAPI BlNtMapViewOfSection(
-    NtMapViewOfSectionFunction orig_MapViewOfSection,
-    HANDLE section,
-    HANDLE process,
-    PVOID *base,
-    ULONG_PTR zero_bits,
-    SIZE_T commit_size,
-    PLARGE_INTEGER offset,
-    PSIZE_T view_size,
-    SECTION_INHERIT inherit,
-    ULONG allocation_type,
-    ULONG protect) {
-  NTSTATUS ret = orig_MapViewOfSection(section, process, base, zero_bits,
-                                       commit_size, offset, view_size, inherit,
-                                       allocation_type, protect);
-
-  if (!NT_SUCCESS(ret) || !sandbox::IsSameProcess(process) ||
-      !IsModuleValidImageSection(section, base, offset, view_size)) {
-    return ret;
-  }
-
-  HMODULE module = reinterpret_cast<HMODULE>(*base);
-  if (module) {
-    UINT image_flags;
-
-    string16 module_name(GetImageInfoFromLoadedModule(
-        reinterpret_cast<HMODULE>(*base), &image_flags));
-    string16 file_name(GetBackingModuleFilePath(*base));
-
-    if (module_name.empty() && (image_flags & sandbox::MODULE_HAS_CODE)) {
-      // If the module has no exports we retrieve the module name from the
-      // full path of the mapped section.
-      module_name = ExtractLoadedModuleName(file_name);
-    }
-
-    if (!module_name.empty() && DllMatch(module_name)) {
-      DCHECK_NT(g_nt_unmap_view_of_section_func);
-      g_nt_unmap_view_of_section_func(process, *base);
-      ret = STATUS_UNSUCCESSFUL;
-    }
-
-  }
-  return ret;
-}
-
-}  // namespace blacklist