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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 "chrome/common/trace_event_args_whitelist.h"
#include "base/bind.h"
#include "base/strings/pattern.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
namespace {
struct WhitelistEntry {
const char* category_name;
const char* event_name;
const char* const* arg_name_filter;
};
const char* const kInputLatencyAllowedArgs[] = {"data", nullptr};
const WhitelistEntry kEventArgsWhitelist[] = {
{"__metadata", "thread_name", nullptr},
{"ipc", "ChannelProxy::Context::OnDispatchMessage", nullptr},
{"ipc", "SyncChannel::Send", nullptr},
{"toplevel", "*", nullptr},
{"latencyInfo", "*", kInputLatencyAllowedArgs},
{nullptr, nullptr, nullptr}};
const char* kMetadataWhitelist[] = {
"command_line",
"config",
"cpu-*",
"field-trials",
"gpu-*",
"highres-ticks",
"network-type",
"num-cpus",
"os-*",
"physical-memory",
"product-version",
"user-agent"
};
} // namespace
bool IsTraceArgumentNameWhitelisted(const char* const* granular_filter,
const char* arg_name) {
for (int i = 0; granular_filter[i] != nullptr; ++i) {
if (base::MatchPattern(arg_name, granular_filter[i]))
return true;
}
return false;
}
bool IsTraceEventArgsWhitelisted(
const char* category_group_name,
const char* event_name,
base::trace_event::ArgumentNameFilterPredicate* arg_name_filter) {
DCHECK(arg_name_filter);
base::CStringTokenizer category_group_tokens(
category_group_name, category_group_name + strlen(category_group_name),
",");
while (category_group_tokens.GetNext()) {
const std::string& category_group_token = category_group_tokens.token();
for (int i = 0; kEventArgsWhitelist[i].category_name != nullptr; ++i) {
const WhitelistEntry& whitelist_entry = kEventArgsWhitelist[i];
DCHECK(whitelist_entry.event_name);
if (base::MatchPattern(category_group_token.c_str(),
whitelist_entry.category_name) &&
base::MatchPattern(event_name, whitelist_entry.event_name)) {
if (whitelist_entry.arg_name_filter) {
*arg_name_filter = base::Bind(&IsTraceArgumentNameWhitelisted,
whitelist_entry.arg_name_filter);
}
return true;
}
}
}
return false;
}
bool IsMetadataWhitelisted(const std::string& metadata_name) {
for (auto key : kMetadataWhitelist) {
if (base::MatchPattern(metadata_name, key)) {
return true;
}
}
return false;
}
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