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/*
* Copyright (C) 2019 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 <dirent.h>
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <unistd.h>
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <android-base/stringprintf.h>
#include <dmabufinfo/dmabufinfo.h>
using DmaBuffer = ::android::dmabufinfo::DmaBuffer;
[[noreturn]] static void usage(int exit_status) {
fprintf(stderr,
"Usage: %s [PID] \n"
"\t If PID is supplied, the dmabuf information for this process is shown.\n"
"\t Otherwise, shows the information for all processes.\n",
getprogname());
exit(exit_status);
}
static std::string GetProcessBaseName(pid_t pid) {
std::string pid_path = android::base::StringPrintf("/proc/%d/comm", pid);
std::ifstream in{pid_path};
if (!in) return std::string("N/A");
std::string line;
std::getline(in, line);
if (!in) return std::string("N/A");
return line;
}
static void AddPidsToSet(const std::unordered_map<pid_t, int>& map, std::set<pid_t>* set)
{
for (auto it = map.begin(); it != map.end(); ++it)
set->insert(it->first);
}
static void PrintDmaBufInfo(const std::vector<DmaBuffer>& bufs) {
std::set<pid_t> pid_set;
std::map<pid_t, int> pid_column;
if (bufs.empty()) {
std::cout << "dmabuf info not found ¯\\_(ツ)_/¯" << std::endl;
return;
}
// Find all unique pids in the input vector, create a set
for (int i = 0; i < bufs.size(); i++) {
AddPidsToSet(bufs[i].fdrefs(), &pid_set);
AddPidsToSet(bufs[i].maprefs(), &pid_set);
}
int pid_count = 0;
std::cout << "\t\t\t\t\t\t";
// Create a map to convert each unique pid into a column number
for (auto it = pid_set.begin(); it != pid_set.end(); ++it, ++pid_count) {
pid_column.insert(std::make_pair(*it, pid_count));
std::cout << ::android::base::StringPrintf("[pid: % 4d]\t", *it);
}
std::cout << std::endl << "\t\t\t\t\t\t";
for (auto it = pid_set.begin(); it != pid_set.end(); ++it) {
std::cout << ::android::base::StringPrintf("%16s",
GetProcessBaseName(*it).c_str());
}
std::cout << std::endl << "\tinode\t\tsize\t\tcount\t";
for (int i = 0; i < pid_count; i++) {
std::cout << "fd\tmap\t";
}
std::cout << std::endl;
auto fds = std::make_unique<int[]>(pid_count);
auto maps = std::make_unique<int[]>(pid_count);
auto pss = std::make_unique<long[]>(pid_count);
memset(pss.get(), 0, sizeof(long) * pid_count);
for (auto buf = bufs.begin(); buf != bufs.end(); ++buf) {
std::cout << ::android::base::StringPrintf("%16lu\t%10" PRIu64 "\t%" PRIu64 "\t",
buf->inode(),buf->size(), buf->count());
memset(fds.get(), 0, sizeof(int) * pid_count);
memset(maps.get(), 0, sizeof(int) * pid_count);
for (auto it = buf->fdrefs().begin(); it != buf->fdrefs().end(); ++it) {
fds[pid_column[it->first]] = it->second;
pss[pid_column[it->first]] += buf->size() * it->second / buf->count();
}
for (auto it = buf->maprefs().begin(); it != buf->maprefs().end(); ++it) {
maps[pid_column[it->first]] = it->second;
pss[pid_column[it->first]] += buf->size() * it->second / buf->count();
}
for (int i = 0; i < pid_count; i++) {
std::cout << ::android::base::StringPrintf("%d\t%d\t", fds[i], maps[i]);
}
std::cout << std::endl;
}
std::cout << "-----------------------------------------" << std::endl;
std::cout << "PSS ";
for (int i = 0; i < pid_count; i++) {
std::cout << ::android::base::StringPrintf("%15ldK", pss[i] / 1024);
}
std::cout << std::endl;
}
int main(int argc, char* argv[]) {
pid_t pid = -1;
std::vector<DmaBuffer> bufs;
bool show_all = true;
if (argc > 1) {
if (sscanf(argv[1], "%d", &pid) == 1) {
show_all = false;
}
else {
usage(EXIT_FAILURE);
}
}
if (show_all) {
if (!ReadDmaBufInfo(&bufs)) {
std::cerr << "debugfs entry for dmabuf not available, skipping" << std::endl;
bufs.clear();
}
std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir("/proc"), closedir);
if (!dir) {
std::cerr << "Failed to open /proc directory" << std::endl;
exit(EXIT_FAILURE);
}
struct dirent* dent;
while ((dent = readdir(dir.get()))) {
if (dent->d_type != DT_DIR) continue;
int matched = sscanf(dent->d_name, "%d", &pid);
if (matched != 1) {
continue;
}
if (!AppendDmaBufInfo(pid, &bufs)) {
std::cerr << "Unable to read dmabuf info for pid " << pid << std::endl;
exit(EXIT_FAILURE);
}
}
} else {
if (!ReadDmaBufInfo(pid, &bufs)) {
std::cerr << "Unable to read dmabuf info" << std::endl;
exit(EXIT_FAILURE);
}
}
PrintDmaBufInfo(bufs);
return 0;
}
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