a707013b78
If the fulfilled policies change without the contents of the target and overlay APKs changing, the idmap for the overlay should be regenerated. This change adds fulfilled policies and enforce overlayable to the idmap header so that idmap2d can determine if the polices or enforce overlayable changed from what was used to generate the idmap. Bug: 119328308 Test: idmap2_tests Test: atest RegenerateIdmapTest Change-Id: I96f970e82b5243be01b205ac2cb6ab249c6100bc
101 lines
3.1 KiB
C++
101 lines
3.1 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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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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*/
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#include "idmap2/BinaryStreamVisitor.h"
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#include <algorithm>
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#include <cstring>
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#include <string>
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#include "android-base/macros.h"
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namespace android::idmap2 {
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void BinaryStreamVisitor::Write(const void* value, size_t length) {
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stream_.write(reinterpret_cast<const char*>(value), length);
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}
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void BinaryStreamVisitor::Write8(uint8_t value) {
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stream_.write(reinterpret_cast<char*>(&value), sizeof(uint8_t));
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}
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void BinaryStreamVisitor::Write16(uint16_t value) {
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uint16_t x = htodl(value);
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stream_.write(reinterpret_cast<char*>(&x), sizeof(uint16_t));
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}
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void BinaryStreamVisitor::Write32(uint32_t value) {
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uint32_t x = htodl(value);
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stream_.write(reinterpret_cast<char*>(&x), sizeof(uint32_t));
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}
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void BinaryStreamVisitor::WriteString256(const StringPiece& value) {
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char buf[kIdmapStringLength];
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memset(buf, 0, sizeof(buf));
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memcpy(buf, value.data(), std::min(value.size(), sizeof(buf)));
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stream_.write(buf, sizeof(buf));
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}
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void BinaryStreamVisitor::WriteString(const std::string& value) {
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// pad with null to nearest word boundary; include at least one terminating null
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size_t padding_size = 4 - (value.size() % 4);
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Write32(value.size() + padding_size);
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stream_.write(value.c_str(), value.size());
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stream_.write("\0\0\0\0", padding_size);
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}
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void BinaryStreamVisitor::visit(const Idmap& idmap ATTRIBUTE_UNUSED) {
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// nothing to do
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}
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void BinaryStreamVisitor::visit(const IdmapHeader& header) {
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Write32(header.GetMagic());
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Write32(header.GetVersion());
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Write32(header.GetTargetCrc());
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Write32(header.GetOverlayCrc());
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Write32(header.GetFulfilledPolicies());
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Write8(static_cast<uint8_t>(header.GetEnforceOverlayable()));
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WriteString256(header.GetTargetPath());
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WriteString256(header.GetOverlayPath());
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WriteString(header.GetDebugInfo());
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}
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void BinaryStreamVisitor::visit(const IdmapData& data) {
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for (const auto& target_entry : data.GetTargetEntries()) {
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Write32(target_entry.target_id);
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Write8(target_entry.data_type);
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Write32(target_entry.data_value);
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}
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for (const auto& overlay_entry : data.GetOverlayEntries()) {
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Write32(overlay_entry.overlay_id);
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Write32(overlay_entry.target_id);
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}
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Write(data.GetStringPoolData(), data.GetHeader()->GetStringPoolLength());
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}
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void BinaryStreamVisitor::visit(const IdmapData::Header& header) {
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Write8(header.GetTargetPackageId());
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Write8(header.GetOverlayPackageId());
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Write32(header.GetTargetEntryCount());
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Write32(header.GetOverlayEntryCount());
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Write32(header.GetStringPoolIndexOffset());
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Write32(header.GetStringPoolLength());
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}
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} // namespace android::idmap2
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