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// Copyright 2014 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 <stdint.h>
#include <windows.h>
#include <algorithm>
#include <vector>
#include "base/base_paths.h"
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/files/memory_mapped_file.h"
#include "base/path_service.h"
#include "base/strings/pattern.h"
#include "base/strings/string_util.h"
#include "base/win/pe_image.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class ELFImportsTest : public testing::Test {
protected:
static bool ImportsCallback(const base::win::PEImage &image,
LPCSTR module,
PIMAGE_THUNK_DATA name_table,
PIMAGE_THUNK_DATA iat,
PVOID cookie) {
std::vector<std::string>* import_list =
reinterpret_cast<std::vector<std::string>*>(cookie);
import_list->push_back(module);
return true;
}
void GetImports(const base::FilePath& module_path,
std::vector<std::string>* imports) {
ASSERT_TRUE(imports != NULL);
base::MemoryMappedFile module_mmap;
ASSERT_TRUE(module_mmap.Initialize(module_path));
base::win::PEImageAsData pe_image_data(
reinterpret_cast<HMODULE>(const_cast<uint8_t*>(module_mmap.data())));
pe_image_data.EnumImportChunks(ELFImportsTest::ImportsCallback, imports);
}
};
// Run this test only in Release builds.
//
// This test makes sure that chrome_elf.dll has only certain types of imports.
// However, it directly and indirectly depends on base, which has lots more
// imports than are allowed here.
//
// In release builds, the offending imports are all stripped since this
// depends on a relatively small portion of base. In GYP, this works in debug
// builds as well because static libraries are used for the sandbox and base
// targets and the files that use e.g. user32.dll happen to not get brought
// into the build in the first place (due to the way static libraries are
// linked where only the required .o files are included). But we don't bother
// differentiating GYP and GN builds for this purpose.
//
// If you break this test, you may have changed base or the Windows sandbox
// such that more system imports are required to link.
#ifdef NDEBUG
TEST_F(ELFImportsTest, ChromeElfSanityCheck) {
base::FilePath dll;
ASSERT_TRUE(PathService::Get(base::DIR_EXE, &dll));
dll = dll.Append(L"chrome_elf.dll");
std::vector<std::string> elf_imports;
GetImports(dll, &elf_imports);
// Check that ELF has imports.
ASSERT_LT(0u, elf_imports.size()) << "Ensure the chrome_elf_unittests "
"target was built, instead of chrome_elf_unittests.exe";
static const char* const kValidFilePatterns[] = {
"KERNEL32.dll",
#if defined(COMPONENT_BUILD)
"MSVC*.dll",
"VCRUNTIME*.dll",
"api-ms-win-crt-*.dll",
#endif
#if defined(SYZYASAN)
"syzyasan_rtl.dll",
#endif
#if defined(ADDRESS_SANITIZER) && defined(COMPONENT_BUILD)
"clang_rt.asan_dynamic-i386.dll",
#endif
"ADVAPI32.dll"
};
// Make sure all of ELF's imports are in the valid imports list.
for (const std::string& import : elf_imports) {
bool match = false;
for (const char* kValidFilePattern : kValidFilePatterns) {
if (base::MatchPattern(import, kValidFilePattern)) {
match = true;
break;
}
}
ASSERT_TRUE(match) << "Illegal import in chrome_elf.dll: " << import;
}
}
#endif // NDEBUG
TEST_F(ELFImportsTest, ChromeExeSanityCheck) {
std::vector<std::string> exe_imports;
base::FilePath exe;
ASSERT_TRUE(PathService::Get(base::DIR_EXE, &exe));
exe = exe.Append(L"chrome.exe");
GetImports(exe, &exe_imports);
// Check that chrome.exe has imports.
ASSERT_LT(0u, exe_imports.size()) << "Ensure the chrome_elf_unittests "
"target was built, instead of chrome_elf_unittests.exe";
// Chrome.exe's first import must be ELF.
EXPECT_EQ("chrome_elf.dll", exe_imports[0]) <<
"Illegal import order in chrome.exe (ensure the chrome_elf_unittest "
"target was built, instead of just chrome_elf_unittests.exe)";
}
} // namespace
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