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// Copyright 2015 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 "chromecast/crash/linux/crash_testing_utils.h"
#include <utility>
#include "base/files/file_util.h"
#include "base/strings/string_split.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
#include "chromecast/base/path_utils.h"
#include "chromecast/base/serializers.h"
#include "chromecast/crash/linux/dump_info.h"
#define RCHECK(cond, retval, err) \
do { \
LOG(ERROR) << (err); \
if (!(cond)) { \
return (retval); \
} \
} while (0)
namespace chromecast {
namespace {
const char kRatelimitKey[] = "ratelimit";
const char kRatelimitPeriodStartKey[] = "period_start";
const char kRatelimitPeriodDumpsKey[] = "period_dumps";
scoped_ptr<base::ListValue> ParseLockFile(const std::string& path) {
std::string lockfile_string;
RCHECK(base::ReadFileToString(base::FilePath(path), &lockfile_string),
nullptr,
"Failed to read file");
std::vector<std::string> lines = base::SplitString(
lockfile_string, "\n", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
scoped_ptr<base::ListValue> dumps = make_scoped_ptr(new base::ListValue());
// Validate dumps
for (const std::string& line : lines) {
if (line.size() == 0)
continue;
scoped_ptr<base::Value> dump_info = DeserializeFromJson(line);
DumpInfo info(dump_info.get());
RCHECK(info.valid(), nullptr, "Invalid DumpInfo");
dumps->Append(std::move(dump_info));
}
return dumps;
}
scoped_ptr<base::Value> ParseMetadataFile(const std::string& path) {
return DeserializeJsonFromFile(base::FilePath(path));
}
int WriteLockFile(const std::string& path, base::ListValue* contents) {
DCHECK(contents);
std::string lockfile;
for (const base::Value* elem : *contents) {
scoped_ptr<std::string> dump_info = SerializeToJson(*elem);
RCHECK(dump_info, -1, "Failed to serialize DumpInfo");
lockfile += *dump_info;
lockfile += "\n"; // Add line seperatators
}
return WriteFile(base::FilePath(path), lockfile.c_str(), lockfile.size()) >= 0
? 0
: -1;
}
bool WriteMetadataFile(const std::string& path, const base::Value* metadata) {
DCHECK(metadata);
return SerializeJsonToFile(base::FilePath(path), *metadata);
}
} // namespace
scoped_ptr<DumpInfo> CreateDumpInfo(const std::string& json_string) {
scoped_ptr<base::Value> value(DeserializeFromJson(json_string));
return make_scoped_ptr(new DumpInfo(value.get()));
}
bool FetchDumps(const std::string& lockfile_path,
ScopedVector<DumpInfo>* dumps) {
DCHECK(dumps);
scoped_ptr<base::ListValue> dump_list = ParseLockFile(lockfile_path);
RCHECK(dump_list, false, "Failed to parse lockfile");
dumps->clear();
for (base::Value* elem : *dump_list) {
scoped_ptr<DumpInfo> dump = make_scoped_ptr(new DumpInfo(elem));
RCHECK(dump->valid(), false, "Invalid DumpInfo");
dumps->push_back(std::move(dump));
}
return true;
}
bool ClearDumps(const std::string& lockfile_path) {
scoped_ptr<base::ListValue> dump_list =
make_scoped_ptr(new base::ListValue());
return WriteLockFile(lockfile_path, dump_list.get()) == 0;
}
bool CreateFiles(const std::string& lockfile_path,
const std::string& metadata_path) {
scoped_ptr<base::DictionaryValue> metadata =
make_scoped_ptr(new base::DictionaryValue());
base::DictionaryValue* ratelimit_fields = new base::DictionaryValue();
metadata->Set(kRatelimitKey, make_scoped_ptr(ratelimit_fields));
ratelimit_fields->SetString(kRatelimitPeriodStartKey, "0");
ratelimit_fields->SetInteger(kRatelimitPeriodDumpsKey, 0);
scoped_ptr<base::ListValue> dumps = make_scoped_ptr(new base::ListValue());
return WriteLockFile(lockfile_path, dumps.get()) == 0 &&
WriteMetadataFile(metadata_path, metadata.get());
}
bool AppendLockFile(const std::string& lockfile_path,
const std::string& metadata_path,
const DumpInfo& dump) {
scoped_ptr<base::ListValue> contents = ParseLockFile(lockfile_path);
if (!contents) {
CreateFiles(lockfile_path, metadata_path);
if (!(contents = ParseLockFile(lockfile_path))) {
return false;
}
}
contents->Append(dump.GetAsValue());
return WriteLockFile(lockfile_path, contents.get()) == 0;
}
bool SetRatelimitPeriodStart(const std::string& metadata_path, time_t start) {
scoped_ptr<base::Value> contents = ParseMetadataFile(metadata_path);
base::DictionaryValue* dict;
base::DictionaryValue* ratelimit_params;
if (!contents || !contents->GetAsDictionary(&dict) ||
!dict->GetDictionary(kRatelimitKey, &ratelimit_params)) {
return false;
}
std::string period_start_str =
base::StringPrintf("%lld", static_cast<long long>(start));
ratelimit_params->SetString(kRatelimitPeriodStartKey, period_start_str);
return WriteMetadataFile(metadata_path, contents.get()) == 0;
}
} // namespace chromecast
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