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// Copyright 2017 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 "components/zucchini/main_utils.h"
#include <stddef.h>
#include <memory>
#include <ostream>
#include <vector>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "components/zucchini/io_utils.h"
#include "components/zucchini/zucchini_commands.h"
#if defined(OS_WIN)
#include <windows.h> // This include must come first.
#include <psapi.h>
#endif
namespace {
/******** Command ********/
// Specifications for a Zucchini command.
struct Command {
constexpr Command(const char* name_in,
const char* usage_in,
int num_args_in,
CommandFunction command_function_in)
: name(name_in),
usage(usage_in),
num_args(num_args_in),
command_function(command_function_in) {}
Command(const Command&) = default;
~Command() = default;
// Unique name of command. |-name| is used to select from command-line.
const char* const name;
// Usage help text of command.
const char* const usage;
// Number of arguments (assumed to be filenames) used by the command.
const int num_args;
// Main function to run for the command.
const CommandFunction command_function;
};
/******** List of Zucchini commands ********/
constexpr Command kCommands[] = {
{"gen", "-gen <old_file> <new_file> <patch_file> [-raw]", 3, &MainGen},
{"apply", "-apply <old_file> <patch_file> <new_file>", 3, &MainApply},
{"read", "-read <exe> [-dump]", 1, &MainRead},
{"detect", "-detect <archive_file> [-dd=format#]", 1, &MainDetect},
{"match", "-match <old_file> <new_file>", 2, &MainMatch},
{"crc32", "-crc32 <file>", 1, &MainCrc32},
};
/******** ScopedResourceUsageTracker ********/
// A class to track and log system resource usage.
class ScopedResourceUsageTracker {
public:
// Initializes states for tracking.
ScopedResourceUsageTracker() {
start_time_ = base::TimeTicks::Now();
#if defined(OS_WIN)
PROCESS_MEMORY_COUNTERS pmc;
if (::GetProcessMemoryInfo(::GetCurrentProcess(), &pmc, sizeof(pmc))) {
start_peak_page_file_usage_ = pmc.PeakPagefileUsage;
start_peak_working_set_size_ = pmc.PeakWorkingSetSize;
}
#endif
}
// Computes and prints usage.
~ScopedResourceUsageTracker() {
base::TimeTicks end_time = base::TimeTicks::Now();
#if defined(OS_WIN)
size_t cur_peak_page_file_usage = 0;
size_t cur_peak_working_set_size = 0;
PROCESS_MEMORY_COUNTERS pmc;
if (::GetProcessMemoryInfo(::GetCurrentProcess(), &pmc, sizeof(pmc))) {
cur_peak_page_file_usage = pmc.PeakPagefileUsage;
cur_peak_working_set_size = pmc.PeakWorkingSetSize;
}
LOG(INFO) << "Zucchini.PeakPagefileUsage "
<< cur_peak_page_file_usage / 1024 << " KiB";
LOG(INFO) << "Zucchini.PeakPagefileUsageChange "
<< (cur_peak_page_file_usage - start_peak_page_file_usage_) / 1024
<< " KiB";
LOG(INFO) << "Zucchini.PeakWorkingSetSize "
<< cur_peak_working_set_size / 1024 << " KiB";
LOG(INFO) << "Zucchini.PeakWorkingSetSizeChange "
<< (cur_peak_working_set_size - start_peak_working_set_size_) /
1024
<< " KiB";
#endif // !defined(OS_MACOSX)
LOG(INFO) << "Zucchini.TotalTime " << (end_time - start_time_).InSecondsF()
<< " s";
}
private:
base::TimeTicks start_time_;
#if defined(OS_WIN)
size_t start_peak_page_file_usage_ = 0;
size_t start_peak_working_set_size_ = 0;
#endif // !defined(OS_MACOSX)
};
/******** Helper functions ********/
// Translates |command_line| arguments to a vector of base::FilePath (expecting
// exactly |expected_count|). On success, writes the results to |paths| and
// returns true. Otherwise returns false.
bool CheckAndGetFilePathParams(const base::CommandLine& command_line,
size_t expected_count,
std::vector<base::FilePath>* paths) {
const base::CommandLine::StringVector& args = command_line.GetArgs();
if (args.size() != expected_count)
return false;
paths->clear();
paths->reserve(args.size());
for (const auto& arg : args)
paths->emplace_back(arg);
return true;
}
// Prints main Zucchini usage text.
void PrintUsage(std::ostream& err) {
err << "Usage:" << std::endl;
for (const Command& command : kCommands)
err << " zucchini " << command.usage << std::endl;
}
} // namespace
/******** Exported Functions ********/
zucchini::status::Code RunZucchiniCommand(const base::CommandLine& command_line,
std::ostream& out,
std::ostream& err) {
// Look for a command with name that matches input.
const Command* command_use = nullptr;
for (const Command& command : kCommands) {
if (command_line.HasSwitch(command.name)) {
if (command_use) { // Too many commands found.
command_use = nullptr; // Set to null to flag error.
break;
}
command_use = &command;
}
}
// Expect exactly 1 matching command. If 0 or >= 2, print usage and quit.
if (!command_use) {
err << "Must have exactly one of:" << std::endl;
err << " [";
zucchini::PrefixSep sep(", ");
for (const Command& command : kCommands)
err << sep << "-" << command.name;
err << "]" << std::endl;
PrintUsage(err);
return zucchini::status::kStatusInvalidParam;
}
// Try to parse filename arguments. On failure, print usage and quit.
std::vector<base::FilePath> paths;
if (!CheckAndGetFilePathParams(command_line, command_use->num_args, &paths)) {
err << command_use->usage << std::endl;
PrintUsage(err);
return zucchini::status::kStatusInvalidParam;
}
ScopedResourceUsageTracker resource_usage_tracker;
return command_use->command_function({command_line, paths, out, err});
}
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