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sed -i '' -E -e 's/Copyright (.+) The Crashpad Authors\. All rights reserved\.$/Copyright \1 The Crashpad Authors/' $(git grep -El 'Copyright (.+) The Crashpad Authors\. All rights reserved\.$') Bug: chromium:1098010 Change-Id: I8d6138469ddbe3d281a5d83f64cf918ec2491611 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3878262 Reviewed-by: Joshua Peraza <jperaza@chromium.org> Commit-Queue: Mark Mentovai <mark@chromium.org>
448 lines
15 KiB
C++
448 lines
15 KiB
C++
// Copyright 2015 The Crashpad Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "snapshot/win/pe_image_reader.h"
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#include <stddef.h>
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#include <string.h>
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#include <algorithm>
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#include <iterator>
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#include <memory>
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#include "base/logging.h"
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#include "base/strings/stringprintf.h"
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#include "client/crashpad_info.h"
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#include "snapshot/win/pe_image_resource_reader.h"
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#include "util/misc/from_pointer_cast.h"
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#include "util/misc/pdb_structures.h"
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#include "util/win/process_structs.h"
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namespace crashpad {
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namespace {
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// Map from Traits to an IMAGE_NT_HEADERSxx.
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template <class Traits>
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struct NtHeadersForTraits;
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template <>
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struct NtHeadersForTraits<process_types::internal::Traits32> {
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using type = IMAGE_NT_HEADERS32;
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};
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template <>
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struct NtHeadersForTraits<process_types::internal::Traits64> {
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using type = IMAGE_NT_HEADERS64;
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};
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} // namespace
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PEImageReader::PEImageReader()
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: module_subrange_reader_(),
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initialized_() {
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}
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PEImageReader::~PEImageReader() {
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}
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bool PEImageReader::Initialize(ProcessReaderWin* process_reader,
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WinVMAddress address,
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WinVMSize size,
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const std::string& module_name) {
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INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
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if (!module_subrange_reader_.Initialize(
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process_reader, address, size, module_name)) {
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return false;
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}
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INITIALIZATION_STATE_SET_VALID(initialized_);
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return true;
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}
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bool PEImageReader::GetCrashpadInfoSection(WinVMAddress* address,
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WinVMSize* size) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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if (module_subrange_reader_.Is64Bit()) {
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return GetCrashpadInfoSectionInternal<process_types::internal::Traits64>(
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address, size);
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} else {
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return GetCrashpadInfoSectionInternal<process_types::internal::Traits32>(
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address, size);
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}
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}
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template <class Traits>
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bool PEImageReader::GetCrashpadInfo(
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process_types::CrashpadInfo<Traits>* crashpad_info) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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IMAGE_SECTION_HEADER section;
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if (!GetSectionByName<typename NtHeadersForTraits<Traits>::type>("CPADinfo",
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§ion)) {
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return false;
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}
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if (section.Misc.VirtualSize <
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offsetof(process_types::CrashpadInfo<Traits>, size) +
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sizeof(crashpad_info->size)) {
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LOG(WARNING) << "small crashpad info section size "
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<< section.Misc.VirtualSize << ", "
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<< module_subrange_reader_.name();
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return false;
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}
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const WinVMAddress crashpad_info_address = Address() + section.VirtualAddress;
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const WinVMSize crashpad_info_size =
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std::min(static_cast<WinVMSize>(sizeof(*crashpad_info)),
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static_cast<WinVMSize>(section.Misc.VirtualSize));
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if (!module_subrange_reader_.ReadMemory(
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crashpad_info_address, crashpad_info_size, crashpad_info)) {
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LOG(WARNING) << "could not read crashpad info from "
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<< module_subrange_reader_.name();
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return false;
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}
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if (crashpad_info->size < sizeof(*crashpad_info)) {
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// Zero out anything beyond the structure’s declared size.
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memset(reinterpret_cast<char*>(crashpad_info) + crashpad_info->size,
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0,
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sizeof(*crashpad_info) - crashpad_info->size);
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}
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if (crashpad_info->signature != CrashpadInfo::kSignature ||
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crashpad_info->version != 1) {
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LOG(WARNING) << base::StringPrintf(
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"unexpected crashpad info signature 0x%x, version %u in %s",
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crashpad_info->signature,
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crashpad_info->version,
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module_subrange_reader_.name().c_str());
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return false;
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}
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// Don’t require strict equality, to leave wiggle room for sloppy linkers.
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if (crashpad_info->size > section.Misc.VirtualSize) {
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LOG(WARNING) << "crashpad info struct size " << crashpad_info->size
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<< " large for section size " << section.Misc.VirtualSize
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<< " in " << module_subrange_reader_.name();
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return false;
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}
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if (crashpad_info->size > sizeof(*crashpad_info)) {
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// This isn’t strictly a problem, because unknown fields will simply be
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// ignored, but it may be of diagnostic interest.
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LOG(INFO) << "large crashpad info size " << crashpad_info->size << ", "
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<< module_subrange_reader_.name();
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}
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return true;
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}
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bool PEImageReader::DebugDirectoryInformation(UUID* uuid,
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DWORD* age,
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std::string* pdbname) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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IMAGE_DATA_DIRECTORY data_directory;
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if (!ImageDataDirectoryEntry(IMAGE_DIRECTORY_ENTRY_DEBUG, &data_directory))
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return false;
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IMAGE_DEBUG_DIRECTORY debug_directory;
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if (data_directory.Size % sizeof(debug_directory) != 0)
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return false;
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for (size_t offset = 0; offset < data_directory.Size;
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offset += sizeof(debug_directory)) {
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if (!module_subrange_reader_.ReadMemory(
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Address() + data_directory.VirtualAddress + offset,
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sizeof(debug_directory),
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&debug_directory)) {
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LOG(WARNING) << "could not read data directory from "
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<< module_subrange_reader_.name();
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return false;
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}
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if (debug_directory.Type != IMAGE_DEBUG_TYPE_CODEVIEW)
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continue;
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if (debug_directory.AddressOfRawData) {
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if (debug_directory.SizeOfData < sizeof(CodeViewRecordPDB70)) {
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LOG(WARNING) << "CodeView debug entry of unexpected size in "
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<< module_subrange_reader_.name();
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continue;
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}
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std::unique_ptr<char[]> data(new char[debug_directory.SizeOfData]);
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if (!module_subrange_reader_.ReadMemory(
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Address() + debug_directory.AddressOfRawData,
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debug_directory.SizeOfData,
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data.get())) {
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LOG(WARNING) << "could not read debug directory from "
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<< module_subrange_reader_.name();
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return false;
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}
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if (*reinterpret_cast<DWORD*>(data.get()) !=
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CodeViewRecordPDB70::kSignature) {
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LOG(WARNING) << "encountered non-7.0 CodeView debug record in "
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<< module_subrange_reader_.name();
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continue;
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}
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CodeViewRecordPDB70* codeview =
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reinterpret_cast<CodeViewRecordPDB70*>(data.get());
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*uuid = codeview->uuid;
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*age = codeview->age;
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// This is a NUL-terminated string encoded in the codepage of the system
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// where the binary was linked. We have no idea what that was, so we just
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// assume ASCII.
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*pdbname = std::string(reinterpret_cast<char*>(&codeview->pdb_name[0]));
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return true;
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} else if (debug_directory.PointerToRawData) {
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// This occurs for non-PDB based debug information. We simply ignore these
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// as we don't expect to encounter modules that will be in this format
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// for which we'll actually have symbols. See
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// https://crashpad.chromium.org/bug/47.
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}
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}
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return false;
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}
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bool PEImageReader::VSFixedFileInfo(
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VS_FIXEDFILEINFO* vs_fixed_file_info) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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IMAGE_DATA_DIRECTORY data_directory;
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if (!ImageDataDirectoryEntry(IMAGE_DIRECTORY_ENTRY_RESOURCE,
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&data_directory)) {
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return false;
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}
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PEImageResourceReader resource_reader;
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if (!resource_reader.Initialize(module_subrange_reader_, data_directory)) {
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return false;
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}
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WinVMAddress address;
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WinVMSize size;
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if (!resource_reader.FindResourceByID(
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FromPointerCast<uint16_t>(VS_FILE_INFO), // RT_VERSION
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VS_VERSION_INFO,
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MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL),
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&address,
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&size,
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nullptr)) {
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return false;
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}
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// This structure is not declared anywhere in the SDK, but is documented at
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// https://msdn.microsoft.com/library/ms647001.aspx.
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struct VS_VERSIONINFO {
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WORD wLength;
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WORD wValueLength;
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WORD wType;
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// The structure documentation on MSDN doesn’t show the [16], but it does
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// say that it’s supposed to be L"VS_VERSION_INFO", which is is in fact a
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// 16-character string (including its NUL terminator).
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WCHAR szKey[16];
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WORD Padding1;
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VS_FIXEDFILEINFO Value;
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// Don’t include Children or the Padding2 that precedes it, because they may
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// not be present.
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// WORD Padding2;
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// WORD Children;
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};
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VS_VERSIONINFO version_info;
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if (size < sizeof(version_info)) {
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LOG(WARNING) << "version info size " << size
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<< " too small for structure of size " << sizeof(version_info)
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<< " in " << module_subrange_reader_.name();
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return false;
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}
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if (!module_subrange_reader_.ReadMemory(
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address, sizeof(version_info), &version_info)) {
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LOG(WARNING) << "could not read version info from "
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<< module_subrange_reader_.name();
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return false;
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}
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if (version_info.wLength < sizeof(version_info) ||
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version_info.wValueLength != sizeof(version_info.Value) ||
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version_info.wType != 0 ||
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wcsncmp(version_info.szKey,
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L"VS_VERSION_INFO",
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std::size(version_info.szKey)) != 0) {
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LOG(WARNING) << "unexpected VS_VERSIONINFO in "
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<< module_subrange_reader_.name();
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return false;
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}
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if (version_info.Value.dwSignature != VS_FFI_SIGNATURE ||
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version_info.Value.dwStrucVersion != VS_FFI_STRUCVERSION) {
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LOG(WARNING) << "unexpected VS_FIXEDFILEINFO in "
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<< module_subrange_reader_.name();
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return false;
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}
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*vs_fixed_file_info = version_info.Value;
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vs_fixed_file_info->dwFileFlags &= vs_fixed_file_info->dwFileFlagsMask;
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return true;
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}
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template <class Traits>
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bool PEImageReader::GetCrashpadInfoSectionInternal(WinVMAddress* address,
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WinVMSize* size) const {
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IMAGE_SECTION_HEADER section;
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if (!GetSectionByName<typename NtHeadersForTraits<Traits>::type>("CPADinfo",
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§ion)) {
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return false;
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}
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process_types::CrashpadInfo<Traits> crashpad_info;
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if (section.Misc.VirtualSize <
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offsetof(process_types::CrashpadInfo<Traits>, size) +
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sizeof(crashpad_info.size)) {
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LOG(WARNING) << "small crashpad info section size "
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<< section.Misc.VirtualSize << ", "
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<< module_subrange_reader_.name();
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return false;
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}
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*address = Address() + section.VirtualAddress;
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*size = std::min<WinVMSize>(sizeof(crashpad_info), section.Misc.VirtualSize);
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return true;
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}
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template <class NtHeadersType>
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bool PEImageReader::ReadNtHeaders(NtHeadersType* nt_headers,
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WinVMAddress* nt_headers_address) const {
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IMAGE_DOS_HEADER dos_header;
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if (!module_subrange_reader_.ReadMemory(
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Address(), sizeof(IMAGE_DOS_HEADER), &dos_header)) {
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LOG(WARNING) << "could not read dos header from "
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<< module_subrange_reader_.name();
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return false;
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}
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if (dos_header.e_magic != IMAGE_DOS_SIGNATURE) {
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LOG(WARNING) << "invalid e_magic in dos header of "
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<< module_subrange_reader_.name();
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return false;
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}
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WinVMAddress local_nt_headers_address = Address() + dos_header.e_lfanew;
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if (!module_subrange_reader_.ReadMemory(
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local_nt_headers_address, sizeof(NtHeadersType), nt_headers)) {
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LOG(WARNING) << "could not read nt headers from "
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<< module_subrange_reader_.name();
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return false;
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}
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if (nt_headers->Signature != IMAGE_NT_SIGNATURE) {
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LOG(WARNING) << "invalid signature in nt headers of "
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<< module_subrange_reader_.name();
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return false;
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}
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if (nt_headers_address)
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*nt_headers_address = local_nt_headers_address;
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return true;
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}
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template <class NtHeadersType>
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bool PEImageReader::GetSectionByName(const std::string& name,
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IMAGE_SECTION_HEADER* section) const {
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if (name.size() > sizeof(section->Name)) {
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LOG(WARNING) << "supplied section name too long " << name;
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return false;
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}
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NtHeadersType nt_headers;
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WinVMAddress nt_headers_address;
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if (!ReadNtHeaders(&nt_headers, &nt_headers_address))
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return false;
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WinVMAddress first_section_address =
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nt_headers_address + offsetof(NtHeadersType, OptionalHeader) +
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nt_headers.FileHeader.SizeOfOptionalHeader;
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for (DWORD i = 0; i < nt_headers.FileHeader.NumberOfSections; ++i) {
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WinVMAddress section_address =
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first_section_address + sizeof(IMAGE_SECTION_HEADER) * i;
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if (!module_subrange_reader_.ReadMemory(
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section_address, sizeof(IMAGE_SECTION_HEADER), section)) {
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LOG(WARNING) << "could not read section " << i << " from "
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<< module_subrange_reader_.name();
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return false;
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}
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if (strncmp(reinterpret_cast<const char*>(section->Name),
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name.c_str(),
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sizeof(section->Name)) == 0) {
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return true;
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}
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}
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return false;
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}
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bool PEImageReader::ImageDataDirectoryEntry(size_t index,
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IMAGE_DATA_DIRECTORY* entry) const {
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bool rv;
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if (module_subrange_reader_.Is64Bit()) {
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rv = ImageDataDirectoryEntryT<IMAGE_NT_HEADERS64>(index, entry);
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} else {
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rv = ImageDataDirectoryEntryT<IMAGE_NT_HEADERS32>(index, entry);
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}
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return rv && entry->VirtualAddress != 0 && entry->Size != 0;
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}
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template <class NtHeadersType>
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bool PEImageReader::ImageDataDirectoryEntryT(
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size_t index,
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IMAGE_DATA_DIRECTORY* entry) const {
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NtHeadersType nt_headers;
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if (!ReadNtHeaders(&nt_headers, nullptr)) {
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return false;
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}
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if (nt_headers.FileHeader.SizeOfOptionalHeader <
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offsetof(decltype(nt_headers.OptionalHeader), DataDirectory[index]) +
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sizeof(nt_headers.OptionalHeader.DataDirectory[index]) ||
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nt_headers.OptionalHeader.NumberOfRvaAndSizes <= index) {
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return false;
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}
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*entry = nt_headers.OptionalHeader.DataDirectory[index];
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return true;
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}
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// Explicit instantiations with the only 2 valid template arguments to avoid
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// putting the body of the function in the header.
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template bool PEImageReader::GetCrashpadInfo<process_types::internal::Traits32>(
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process_types::CrashpadInfo<process_types::internal::Traits32>*
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crashpad_info) const;
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template bool PEImageReader::GetCrashpadInfo<process_types::internal::Traits64>(
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process_types::CrashpadInfo<process_types::internal::Traits64>*
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crashpad_info) const;
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} // namespace crashpad
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