You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
4.0 KiB
120 lines
4.0 KiB
/*
|
|
* Copyright (C) 2020 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 <android-base/parseint.h>
|
|
#include <android-base/strings.h>
|
|
#include <binder/Binder.h>
|
|
#include <sys/types.h>
|
|
#include <fstream>
|
|
#include <regex>
|
|
|
|
#include <binderdebug/BinderDebug.h>
|
|
|
|
namespace android {
|
|
|
|
static std::string contextToString(BinderDebugContext context) {
|
|
switch (context) {
|
|
case BinderDebugContext::BINDER:
|
|
return "binder";
|
|
case BinderDebugContext::HWBINDER:
|
|
return "hwbinder";
|
|
case BinderDebugContext::VNDBINDER:
|
|
return "vndbinder";
|
|
default:
|
|
return std::string();
|
|
}
|
|
}
|
|
|
|
static status_t scanBinderContext(pid_t pid, const std::string& contextName,
|
|
std::function<void(const std::string&)> eachLine) {
|
|
std::ifstream ifs("/dev/binderfs/binder_logs/proc/" + std::to_string(pid));
|
|
if (!ifs.is_open()) {
|
|
ifs.open("/d/binder/proc/" + std::to_string(pid));
|
|
if (!ifs.is_open()) {
|
|
return -errno;
|
|
}
|
|
}
|
|
static const std::regex kContextLine("^context (\\w+)$");
|
|
|
|
bool isDesiredContext = false;
|
|
std::string line;
|
|
std::smatch match;
|
|
while (getline(ifs, line)) {
|
|
if (std::regex_search(line, match, kContextLine)) {
|
|
isDesiredContext = match.str(1) == contextName;
|
|
continue;
|
|
}
|
|
if (!isDesiredContext) {
|
|
continue;
|
|
}
|
|
eachLine(line);
|
|
}
|
|
return OK;
|
|
}
|
|
|
|
status_t getBinderPidInfo(BinderDebugContext context, pid_t pid, BinderPidInfo* pidInfo) {
|
|
std::smatch match;
|
|
static const std::regex kReferencePrefix("^\\s*node \\d+:\\s+u([0-9a-f]+)\\s+c([0-9a-f]+)\\s+");
|
|
static const std::regex kThreadPrefix("^\\s*thread \\d+:\\s+l\\s+(\\d)(\\d)");
|
|
std::string contextStr = contextToString(context);
|
|
status_t ret = scanBinderContext(pid, contextStr, [&](const std::string& line) {
|
|
if (std::regex_search(line, match, kReferencePrefix)) {
|
|
const std::string& ptrString = "0x" + match.str(2); // use number after c
|
|
uint64_t ptr;
|
|
if (!::android::base::ParseUint(ptrString.c_str(), &ptr)) {
|
|
// Should not reach here, but just be tolerant.
|
|
return;
|
|
}
|
|
const std::string proc = " proc ";
|
|
auto pos = line.rfind(proc);
|
|
if (pos != std::string::npos) {
|
|
for (const std::string& pidStr : base::Split(line.substr(pos + proc.size()), " ")) {
|
|
int32_t pid;
|
|
if (!::android::base::ParseInt(pidStr, &pid)) {
|
|
return;
|
|
}
|
|
pidInfo->refPids[ptr].push_back(pid);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
if (std::regex_search(line, match, kThreadPrefix)) {
|
|
// "1" is waiting in binder driver
|
|
// "2" is poll. It's impossible to tell if these are in use.
|
|
// and HIDL default code doesn't use it.
|
|
bool isInUse = match.str(1) != "1";
|
|
// "0" is a thread that has called into binder
|
|
// "1" is looper thread
|
|
// "2" is main looper thread
|
|
bool isBinderThread = match.str(2) != "0";
|
|
if (!isBinderThread) {
|
|
return;
|
|
}
|
|
if (isInUse) {
|
|
pidInfo->threadUsage++;
|
|
}
|
|
|
|
pidInfo->threadCount++;
|
|
return;
|
|
}
|
|
return;
|
|
});
|
|
return ret;
|
|
}
|
|
|
|
} // namespace android
|