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/*
* Copyright (C) 2014 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.
*/
#ifndef ART_CMDLINE_CMDLINE_H_
#define ART_CMDLINE_CMDLINE_H_
#include <stdio.h>
#include <stdlib.h>
#include <fstream>
#include <iostream>
#include <string>
#include <string_view>
#include "android-base/stringprintf.h"
#include "base/file_utils.h"
#include "base/logging.h"
#include "base/mutex.h"
#include "base/string_view_cpp20.h"
#include "noop_compiler_callbacks.h"
#include "runtime.h"
#if !defined(NDEBUG)
#define DBG_LOG LOG(INFO)
#else
#define DBG_LOG LOG(DEBUG)
#endif
namespace art {
// TODO: Move to <runtime/utils.h> and remove all copies of this function.
static bool LocationToFilename(const std::string& location, InstructionSet isa,
std::string* filename) {
bool has_system = false;
bool has_cache = false;
// image_location = /system/framework/boot.art
// system_image_filename = /system/framework/<image_isa>/boot.art
std::string system_filename(GetSystemImageFilename(location.c_str(), isa));
if (OS::FileExists(system_filename.c_str())) {
has_system = true;
}
bool have_android_data = false;
bool dalvik_cache_exists = false;
bool is_global_cache = false;
std::string dalvik_cache;
GetDalvikCache(GetInstructionSetString(isa), false, &dalvik_cache,
&have_android_data, &dalvik_cache_exists, &is_global_cache);
std::string cache_filename;
if (have_android_data && dalvik_cache_exists) {
// Always set output location even if it does not exist,
// so that the caller knows where to create the image.
//
// image_location = /system/framework/boot.art
// *image_filename = /data/dalvik-cache/<image_isa>/boot.art
std::string error_msg;
if (GetDalvikCacheFilename(location.c_str(), dalvik_cache.c_str(),
&cache_filename, &error_msg)) {
has_cache = true;
}
}
if (has_system) {
*filename = system_filename;
return true;
} else if (has_cache) {
*filename = cache_filename;
return true;
} else {
*filename = system_filename;
return false;
}
}
static Runtime* StartRuntime(const char* boot_image_location,
InstructionSet instruction_set,
const std::vector<const char*>& runtime_args) {
CHECK(boot_image_location != nullptr);
RuntimeOptions options;
// We are more like a compiler than a run-time. We don't want to execute code.
{
static NoopCompilerCallbacks callbacks;
options.push_back(std::make_pair("compilercallbacks", &callbacks));
}
// Boot image location.
{
std::string boot_image_option;
boot_image_option += "-Ximage:";
boot_image_option += boot_image_location;
options.push_back(std::make_pair(boot_image_option, nullptr));
}
// Instruction set.
options.push_back(
std::make_pair("imageinstructionset",
reinterpret_cast<const void*>(GetInstructionSetString(instruction_set))));
// Explicit runtime args.
for (const char* runtime_arg : runtime_args) {
options.push_back(std::make_pair(runtime_arg, nullptr));
}
// None of the command line tools need sig chain. If this changes we'll need
// to upgrade this option to a proper parameter.
options.push_back(std::make_pair("-Xno-sig-chain", nullptr));
if (!Runtime::Create(options, false)) {
fprintf(stderr, "Failed to create runtime\n");
return nullptr;
}
// Runtime::Create acquired the mutator_lock_ that is normally given away when we Runtime::Start,
// give it away now and then switch to a more manageable ScopedObjectAccess.
Thread::Current()->TransitionFromRunnableToSuspended(kNative);
return Runtime::Current();
}
struct CmdlineArgs {
enum ParseStatus {
kParseOk, // Parse successful. Do not set the error message.
kParseUnknownArgument, // Unknown argument. Do not set the error message.
kParseError, // Parse ok, but failed elsewhere. Print the set error message.
};
bool Parse(int argc, char** argv) {
// Skip over argv[0].
argv++;
argc--;
if (argc == 0) {
fprintf(stderr, "No arguments specified\n");
PrintUsage();
return false;
}
std::string error_msg;
for (int i = 0; i < argc; i++) {
const char* const raw_option = argv[i];
const std::string_view option(raw_option);
if (StartsWith(option, "--boot-image=")) {
boot_image_location_ = raw_option + strlen("--boot-image=");
} else if (StartsWith(option, "--instruction-set=")) {
const char* const instruction_set_str = raw_option + strlen("--instruction-set=");
instruction_set_ = GetInstructionSetFromString(instruction_set_str);
if (instruction_set_ == InstructionSet::kNone) {
fprintf(stderr, "Unsupported instruction set %s\n", instruction_set_str);
PrintUsage();
return false;
}
} else if (option == "--runtime-arg") {
if (i + 1 == argc) {
fprintf(stderr, "Missing argument for --runtime-arg\n");
PrintUsage();
return false;
}
++i;
runtime_args_.push_back(argv[i]);
} else if (StartsWith(option, "--output=")) {
output_name_ = std::string(option.substr(strlen("--output=")));
const char* filename = output_name_.c_str();
out_.reset(new std::ofstream(filename));
if (!out_->good()) {
fprintf(stderr, "Failed to open output filename %s\n", filename);
PrintUsage();
return false;
}
os_ = out_.get();
} else {
ParseStatus parse_status = ParseCustom(raw_option, option.length(), &error_msg);
if (parse_status == kParseUnknownArgument) {
fprintf(stderr, "Unknown argument %s\n", option.data());
}
if (parse_status != kParseOk) {
fprintf(stderr, "%s\n", error_msg.c_str());
PrintUsage();
return false;
}
}
}
DBG_LOG << "will call parse checks";
{
ParseStatus checks_status = ParseChecks(&error_msg);
if (checks_status != kParseOk) {
fprintf(stderr, "%s\n", error_msg.c_str());
PrintUsage();
return false;
}
}
return true;
}
virtual std::string GetUsage() const {
std::string usage;
usage += // Required.
" --boot-image=<file.art>: provide the image location for the boot class path.\n"
" Do not include the arch as part of the name, it is added automatically.\n"
" Example: --boot-image=/system/framework/boot.art\n"
" (specifies /system/framework/<arch>/boot.art as the image file)\n"
"\n";
usage += android::base::StringPrintf( // Optional.
" --instruction-set=(arm|arm64|x86|x86_64): for locating the image\n"
" file based on the image location set.\n"
" Example: --instruction-set=x86\n"
" Default: %s\n"
"\n",
GetInstructionSetString(kRuntimeISA));
usage +=
" --runtime-arg <argument> used to specify various arguments for the runtime\n"
" such as initial heap size, maximum heap size, and verbose output.\n"
" Use a separate --runtime-arg switch for each argument.\n"
" Example: --runtime-arg -Xms256m\n"
"\n";
usage += // Optional.
" --output=<file> may be used to send the output to a file.\n"
" Example: --output=/tmp/oatdump.txt\n"
"\n";
return usage;
}
// Specified by --boot-image.
const char* boot_image_location_ = nullptr;
// Specified by --instruction-set.
InstructionSet instruction_set_ = InstructionSet::kNone;
// Runtime arguments specified by --runtime-arg.
std::vector<const char*> runtime_args_;
// Specified by --output.
std::ostream* os_ = &std::cout;
std::unique_ptr<std::ofstream> out_; // If something besides cout is used
std::string output_name_;
virtual ~CmdlineArgs() {}
bool ParseCheckBootImage(std::string* error_msg) {
if (boot_image_location_ == nullptr) {
*error_msg = "--boot-image must be specified";
return false;
}
if (instruction_set_ == InstructionSet::kNone) {
LOG(WARNING) << "No instruction set given, assuming " << GetInstructionSetString(kRuntimeISA);
instruction_set_ = kRuntimeISA;
}
DBG_LOG << "boot image location: " << boot_image_location_;
// Checks for --boot-image location.
{
std::string boot_image_location = boot_image_location_;
size_t separator_pos = boot_image_location.find(':');
if (separator_pos != std::string::npos) {
boot_image_location = boot_image_location.substr(/*pos*/ 0u, /*size*/ separator_pos);
}
size_t file_name_idx = boot_image_location.rfind('/');
if (file_name_idx == std::string::npos) { // Prevent a InsertIsaDirectory check failure.
*error_msg = "Boot image location must have a / in it";
return false;
}
// Don't let image locations with the 'arch' in it through, since it's not a location.
// This prevents a common error "Could not create an image space..." when initing the Runtime.
if (file_name_idx != std::string::npos) {
std::string no_file_name = boot_image_location.substr(0, file_name_idx);
size_t ancestor_dirs_idx = no_file_name.rfind('/');
std::string parent_dir_name;
if (ancestor_dirs_idx != std::string::npos) {
parent_dir_name = no_file_name.substr(ancestor_dirs_idx + 1);
} else {
parent_dir_name = no_file_name;
}
DBG_LOG << "boot_image_location parent_dir_name was " << parent_dir_name;
if (GetInstructionSetFromString(parent_dir_name.c_str()) != InstructionSet::kNone) {
*error_msg = "Do not specify the architecture as part of the boot image location";
return false;
}
}
// Check that the boot image location points to a valid file name.
std::string file_name;
if (!LocationToFilename(boot_image_location, instruction_set_, &file_name)) {
*error_msg = android::base::StringPrintf(
"No corresponding file for location '%s' (filename '%s') exists",
boot_image_location.c_str(),
file_name.c_str());
return false;
}
DBG_LOG << "boot_image_filename does exist: " << file_name;
}
return true;
}
void PrintUsage() {
fprintf(stderr, "%s", GetUsage().c_str());
}
protected:
virtual ParseStatus ParseCustom(const char* raw_option ATTRIBUTE_UNUSED,
size_t raw_option_length ATTRIBUTE_UNUSED,
std::string* error_msg ATTRIBUTE_UNUSED) {
return kParseUnknownArgument;
}
virtual ParseStatus ParseChecks(std::string* error_msg ATTRIBUTE_UNUSED) {
return kParseOk;
}
};
template <typename Args = CmdlineArgs>
struct CmdlineMain {
int Main(int argc, char** argv) {
Locks::Init();
InitLogging(argv, Runtime::Abort);
std::unique_ptr<Args> args = std::unique_ptr<Args>(CreateArguments());
args_ = args.get();
DBG_LOG << "Try to parse";
if (args_ == nullptr || !args_->Parse(argc, argv)) {
return EXIT_FAILURE;
}
bool needs_runtime = NeedsRuntime();
std::unique_ptr<Runtime> runtime;
if (needs_runtime) {
std::string error_msg;
if (!args_->ParseCheckBootImage(&error_msg)) {
fprintf(stderr, "%s\n", error_msg.c_str());
args_->PrintUsage();
return EXIT_FAILURE;
}
runtime.reset(CreateRuntime(args.get()));
if (runtime == nullptr) {
return EXIT_FAILURE;
}
if (!ExecuteWithRuntime(runtime.get())) {
return EXIT_FAILURE;
}
} else {
if (!ExecuteWithoutRuntime()) {
return EXIT_FAILURE;
}
}
if (!ExecuteCommon()) {
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
// Override this function to create your own arguments.
// Usually will want to return a subtype of CmdlineArgs.
virtual Args* CreateArguments() {
return new Args();
}
// Override this function to do something else with the runtime.
virtual bool ExecuteWithRuntime(Runtime* runtime) {
CHECK(runtime != nullptr);
// Do nothing
return true;
}
// Does the code execution need a runtime? Sometimes it doesn't.
virtual bool NeedsRuntime() {
return true;
}
// Do execution without having created a runtime.
virtual bool ExecuteWithoutRuntime() {
return true;
}
// Continue execution after ExecuteWith[out]Runtime
virtual bool ExecuteCommon() {
return true;
}
virtual ~CmdlineMain() {}
protected:
Args* args_ = nullptr;
private:
Runtime* CreateRuntime(CmdlineArgs* args) {
CHECK(args != nullptr);
return StartRuntime(args->boot_image_location_, args->instruction_set_, args_->runtime_args_);
}
};
} // namespace art
#endif // ART_CMDLINE_CMDLINE_H_