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/*
** Copyright 2016, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include "otapreopt_parameters.h"
#include <cstring>
#include <android-base/logging.h>
#include "dexopt.h"
#include "installd_constants.h"
#include "otapreopt_utils.h"
#ifndef LOG_TAG
#define LOG_TAG "otapreopt"
#endif
namespace android {
namespace installd {
static bool ParseBool(const char* in) {
if (strcmp(in, "true") == 0) {
return true;
}
return false;
}
static const char* ParseNull(const char* arg) {
return (strcmp(arg, "!") == 0) ? nullptr : arg;
}
static bool ParseUInt(const char* in, uint32_t* out) {
char* end;
long long int result = strtoll(in, &end, 0);
if (in == end || *end != '\0') {
return false;
}
if (result < std::numeric_limits<uint32_t>::min() ||
std::numeric_limits<uint32_t>::max() < result) {
return false;
}
*out = static_cast<uint32_t>(result);
return true;
}
bool OTAPreoptParameters::ReadArguments(int argc, const char** argv) {
// Expected command line:
// target-slot [version] dexopt {DEXOPT_PARAMETERS}
const char* target_slot_arg = argv[1];
if (target_slot_arg == nullptr) {
LOG(ERROR) << "Missing parameters";
return false;
}
// Sanitize value. Only allow (a-zA-Z0-9_)+.
target_slot = target_slot_arg;
if (!ValidateTargetSlotSuffix(target_slot)) {
LOG(ERROR) << "Target slot suffix not legal: " << target_slot;
return false;
}
// Check for version or "dexopt" next.
if (argv[2] == nullptr) {
LOG(ERROR) << "Missing parameters";
return false;
}
if (std::string("dexopt").compare(argv[2]) == 0) {
// This is version 1 (N) or pre-versioning version 2.
constexpr int kV2ArgCount = 1 // "otapreopt"
+ 1 // slot
+ 1 // "dexopt"
+ 1 // apk_path
+ 1 // uid
+ 1 // pkg
+ 1 // isa
+ 1 // dexopt_needed
+ 1 // oat_dir
+ 1 // dexopt_flags
+ 1 // filter
+ 1 // volume
+ 1 // libs
+ 1; // seinfo
if (argc == kV2ArgCount) {
return ReadArgumentsPostV1(2, argv, false);
} else {
return ReadArgumentsV1(argv);
}
}
uint32_t version;
if (!ParseUInt(argv[2], &version)) {
LOG(ERROR) << "Could not parse version: " << argv[2];
return false;
}
return ReadArgumentsPostV1(version, argv, true);
}
static int ReplaceMask(int input, int old_mask, int new_mask) {
return (input & old_mask) != 0 ? new_mask : 0;
}
void OTAPreoptParameters::SetDefaultsForPostV1Arguments() {
// Set se_info to null. It is only relevant for secondary dex files, which we won't
// receive from a v1 A side.
se_info = nullptr;
// Set downgrade to false. It is only relevant when downgrading compiler
// filter, which is not the case during ota.
downgrade = false;
// Set target_sdk_version to 0, ie the platform SDK version. This is
// conservative and may force some classes to verify at runtime.
target_sdk_version = 0;
// Set the profile name to the primary apk profile.
profile_name = "primary.prof";
// By default we don't have a dex metadata file.
dex_metadata_path = nullptr;
// The compilation reason is ab-ota (match the system property pm.dexopt.ab-ota)
compilation_reason = "ab-ota";
// Flag is enabled by default for A/B otas.
dexopt_flags = DEXOPT_GENERATE_COMPACT_DEX;
}
bool OTAPreoptParameters::ReadArgumentsV1(const char** argv) {
// Check for "dexopt".
if (argv[2] == nullptr) {
LOG(ERROR) << "Missing parameters";
return false;
}
if (std::string("dexopt").compare(argv[2]) != 0) {
LOG(ERROR) << "Expected \"dexopt\" but found: " << argv[2];
return false;
}
SetDefaultsForPostV1Arguments();
size_t param_index = 0;
for (;; ++param_index) {
const char* param = argv[3 + param_index];
if (param == nullptr) {
break;
}
switch (param_index) {
case 0:
apk_path = param;
break;
case 1:
uid = atoi(param);
break;
case 2:
pkgName = param;
break;
case 3:
instruction_set = param;
break;
case 4: {
// Version 1 had:
// DEXOPT_DEX2OAT_NEEDED = 1
// DEXOPT_PATCHOAT_NEEDED = 2
// DEXOPT_SELF_PATCHOAT_NEEDED = 3
// We will simply use DEX2OAT_FROM_SCRATCH.
dexopt_needed = DEX2OAT_FROM_SCRATCH;
break;
}
case 5:
oat_dir = param;
break;
case 6: {
// Version 1 had:
constexpr int OLD_DEXOPT_PUBLIC = 1 << 1;
// Note: DEXOPT_SAFEMODE has been removed.
// constexpr int OLD_DEXOPT_SAFEMODE = 1 << 2;
constexpr int OLD_DEXOPT_DEBUGGABLE = 1 << 3;
constexpr int OLD_DEXOPT_BOOTCOMPLETE = 1 << 4;
constexpr int OLD_DEXOPT_PROFILE_GUIDED = 1 << 5;
constexpr int OLD_DEXOPT_OTA = 1 << 6;
static_assert(DEXOPT_GENERATE_COMPACT_DEX > OLD_DEXOPT_OTA, "must not overlap");
int input = atoi(param);
dexopt_flags |=
ReplaceMask(input, OLD_DEXOPT_PUBLIC, DEXOPT_PUBLIC) |
ReplaceMask(input, OLD_DEXOPT_DEBUGGABLE, DEXOPT_DEBUGGABLE) |
ReplaceMask(input, OLD_DEXOPT_BOOTCOMPLETE, DEXOPT_BOOTCOMPLETE) |
ReplaceMask(input, OLD_DEXOPT_PROFILE_GUIDED, DEXOPT_PROFILE_GUIDED) |
ReplaceMask(input, OLD_DEXOPT_OTA, 0);
break;
}
case 7:
compiler_filter = param;
break;
case 8:
volume_uuid = ParseNull(param);
break;
case 9:
shared_libraries = ParseNull(param);
break;
default:
LOG(ERROR) << "Too many arguments, got " << param;
return false;
}
}
if (param_index != 10) {
LOG(ERROR) << "Not enough parameters";
return false;
}
return true;
}
bool OTAPreoptParameters::ReadArgumentsPostV1(uint32_t version, const char** argv, bool versioned) {
size_t num_args_expected = 0;
switch (version) {
case 2: num_args_expected = 11; break;
case 3: num_args_expected = 12; break;
case 4: num_args_expected = 13; break;
case 5: num_args_expected = 14; break;
case 6: num_args_expected = 15; break;
case 7:
// Version 8 adds a new dexopt flag: DEXOPT_GENERATE_COMPACT_DEX
case 8: num_args_expected = 16; break;
// Version 9 adds a new dexopt flag: DEXOPT_GENERATE_APP_IMAGE
case 9: num_args_expected = 16; break;
// Version 10 is a compatibility bump.
case 10: num_args_expected = 16; break;
default:
LOG(ERROR) << "Don't know how to read arguments for version " << version;
return false;
}
size_t dexopt_index = versioned ? 3 : 2;
// Check for "dexopt".
if (argv[dexopt_index] == nullptr) {
LOG(ERROR) << "Missing parameters";
return false;
}
if (std::string("dexopt").compare(argv[dexopt_index]) != 0) {
LOG(ERROR) << "Expected \"dexopt\" but found: " << argv[dexopt_index];
return false;
}
// Validate the number of arguments.
size_t num_args_actual = 0;
while (argv[dexopt_index + 1 + num_args_actual] != nullptr) {
num_args_actual++;
}
if (num_args_actual != num_args_expected) {
LOG(ERROR) << "Invalid number of arguments. expected="
<< num_args_expected << " actual=" << num_args_actual;
return false;
}
// The number of arguments is OK.
// Configure the default values for the parameters that were added after V1.
// The default values will be overwritten in case they are passed as arguments.
SetDefaultsForPostV1Arguments();
for (size_t param_index = 0; param_index < num_args_actual; ++param_index) {
const char* param = argv[dexopt_index + 1 + param_index];
switch (param_index) {
case 0:
apk_path = param;
break;
case 1:
uid = atoi(param);
break;
case 2:
pkgName = param;
break;
case 3:
instruction_set = param;
break;
case 4:
dexopt_needed = atoi(param);
break;
case 5:
oat_dir = param;
break;
case 6:
dexopt_flags = atoi(param);
// Add CompactDex generation flag for versions less than 8 since it wasn't passed
// from the package manager. Only conditionally set the flag here so that it can
// be fully controlled by the package manager.
dexopt_flags |= (version < 8) ? DEXOPT_GENERATE_COMPACT_DEX : 0u;
break;
case 7:
compiler_filter = param;
break;
case 8:
volume_uuid = ParseNull(param);
break;
case 9:
shared_libraries = ParseNull(param);
break;
case 10:
se_info = ParseNull(param);
break;
case 11:
downgrade = ParseBool(param);
break;
case 12:
target_sdk_version = atoi(param);
break;
case 13:
profile_name = ParseNull(param);
break;
case 14:
dex_metadata_path = ParseNull(param);
break;
case 15:
compilation_reason = ParseNull(param);
break;
default:
LOG(FATAL) << "Should not get here. Did you call ReadArguments "
<< "with the right expectation? index=" << param_index
<< " num_args=" << num_args_actual;
return false;
}
}
if (version < 10) {
// Do not accept '&' as shared libraries from versions prior to 10. These may lead
// to runtime crashes. The server side of version 10+ should send the correct
// context in almost all cases (e.g., only for actual shared packages).
if (shared_libraries != nullptr && std::string("&") == shared_libraries) {
return false;
}
}
return true;
}
} // namespace installd
} // namespace android