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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 "atrace_process_dump.h"
#include <stdint.h>
#include <limits>
#include "file_utils.h"
#include "logging.h"
#include "procfs_utils.h"
namespace {
const int kMemInfoIntervalMs = 100; // 100ms-ish.
} // namespace
AtraceProcessDump::AtraceProcessDump() {
self_pid_ = static_cast<int>(getpid());
}
AtraceProcessDump::~AtraceProcessDump() {
}
void AtraceProcessDump::SetDumpInterval(int interval_ms) {
CHECK(interval_ms >= kMemInfoIntervalMs);
dump_interval_in_timer_ticks_ = interval_ms / kMemInfoIntervalMs;
// Approximately equals to kMemInfoIntervalMs.
int tick_interval_ms = interval_ms / dump_interval_in_timer_ticks_;
snapshot_timer_ = std::unique_ptr<time_utils::PeriodicTimer>(
new time_utils::PeriodicTimer(tick_interval_ms));
}
void AtraceProcessDump::RunAndPrintJson(FILE* stream) {
out_ = stream;
fprintf(out_, "{\"start_ts\": \"%llu\", \"snapshots\":[\n",
time_utils::GetTimestamp());
CHECK(snapshot_timer_);
snapshot_timer_->Start();
int tick_count = std::numeric_limits<int>::max();
if (dump_count_ > 0)
tick_count = dump_count_ * dump_interval_in_timer_ticks_;
for (int tick = 0; tick < tick_count; tick++) {
if (tick > 0) {
if (!snapshot_timer_->Wait())
break; // Interrupted by signal.
fprintf(out_, ",\n");
}
TakeAndSerializeMemInfo();
if (!(tick % dump_interval_in_timer_ticks_)) {
fprintf(out_, ",\n");
TakeGlobalSnapshot();
SerializeSnapshot();
}
fflush(out_);
}
fprintf(out_, "],\n");
SerializePersistentProcessInfo();
fprintf(out_, "}\n");
fflush(out_);
Cleanup();
}
void AtraceProcessDump::Stop() {
CHECK(snapshot_timer_);
snapshot_timer_->Stop();
}
void AtraceProcessDump::TakeGlobalSnapshot() {
snapshot_.clear();
snapshot_timestamp_ = time_utils::GetTimestamp();
file_utils::ForEachPidInProcPath("/proc", [this](int pid) {
// Skip if not regognized as a process.
if (!UpdatePersistentProcessInfo(pid))
return;
const ProcessInfo* process = processes_[pid].get();
// Snapshot can't be obtained for kernel workers.
if (process->in_kernel)
return;
ProcessSnapshot* process_snapshot = new ProcessSnapshot();
snapshot_[pid] = std::unique_ptr<ProcessSnapshot>(process_snapshot);
process_snapshot->pid = pid;
procfs_utils::ReadOomStats(process_snapshot);
procfs_utils::ReadPageFaultsAndCpuTimeStats(process_snapshot);
if (ShouldTakeFullDump(process)) {
process_snapshot->memory.ReadFullStats(pid);
} else {
process_snapshot->memory.ReadLightStats(pid);
}
if (graphics_stats_ && process->is_app) {
process_snapshot->memory.ReadGpuStats(pid);
}
});
}
bool AtraceProcessDump::UpdatePersistentProcessInfo(int pid) {
if (!processes_.count(pid)) {
if (procfs_utils::ReadTgid(pid) != pid)
return false;
processes_[pid] = procfs_utils::ReadProcessInfo(pid);
}
ProcessInfo* process = processes_[pid].get();
procfs_utils::ReadProcessThreads(process);
if (full_dump_mode_ == FullDumpMode::kOnlyWhitelisted &&
full_dump_whitelist_.count(process->name)) {
full_dump_whitelisted_pids_.insert(pid);
}
return true;
}
bool AtraceProcessDump::ShouldTakeFullDump(const ProcessInfo* process) {
if (full_dump_mode_ == FullDumpMode::kAllProcesses)
return !process->in_kernel && (process->pid != self_pid_);
if (full_dump_mode_ == FullDumpMode::kAllJavaApps)
return process->is_app;
if (full_dump_mode_ == FullDumpMode::kDisabled)
return false;
return full_dump_whitelisted_pids_.count(process->pid) > 0;
}
void AtraceProcessDump::SerializeSnapshot() {
fprintf(out_, "{\"ts\":\"%llu\",\"memdump\":{\n", snapshot_timestamp_);
for (auto it = snapshot_.begin(); it != snapshot_.end();) {
const ProcessSnapshot* process = it->second.get();
const ProcessMemoryStats* mem = &process->memory;
fprintf(out_, "\"%d\":{", process->pid);
fprintf(out_, "\"vm\":%llu,\"rss\":%llu",
mem->virt_kb(), mem->rss_kb());
fprintf(out_, ",\"oom_sc\":%d,\"oom_sc_adj\":%d"
",\"min_flt\":%lu,\"maj_flt\":%lu"
",\"utime\":%lu,\"stime\":%lu",
process->oom_score, process->oom_score_adj,
process->minor_faults, process->major_faults,
process->utime, process->stime);
if (mem->full_stats_available()) {
fprintf(out_, ",\"pss\":%llu,\"swp\":%llu"
",\"pc\":%llu,\"pd\":%llu,\"sc\":%llu,\"sd\":%llu",
mem->pss_kb(), mem->swapped_kb(),
mem->private_clean_kb(), mem->private_dirty_kb(),
mem->shared_clean_kb(), mem->shared_dirty_kb());
}
if (mem->gpu_stats_available()) {
fprintf(out_, ",\"gpu_egl\":%llu,\"gpu_egl_pss\":%llu"
",\"gpu_gl\":%llu,\"gpu_gl_pss\":%llu"
",\"gpu_etc\":%llu,\"gpu_etc_pss\":%llu",
mem->gpu_graphics_kb(), mem->gpu_graphics_pss_kb(),
mem->gpu_gl_kb(), mem->gpu_gl_pss_kb(),
mem->gpu_other_kb(), mem->gpu_other_pss_kb());
}
// Memory maps are too heavy to serialize. Enable only in whitelisting mode.
if (print_smaps_ &&
full_dump_mode_ == FullDumpMode::kOnlyWhitelisted &&
mem->full_stats_available() &&
full_dump_whitelisted_pids_.count(process->pid)) {
fprintf(out_, ", \"mmaps\":[");
size_t n_mmaps = mem->mmaps_count();
for (size_t k = 0; k < n_mmaps; ++k) {
const ProcessMemoryStats::MmapInfo* mm = mem->mmap(k);
fprintf(out_,
"{\"vm\":\"%llx-%llx\",\"file\":\"%s\",\"flags\":\"%s\","
"\"pss\":%llu,\"rss\":%llu,\"swp\":%llu,"
"\"pc\":%llu,\"pd\":%llu,"
"\"sc\":%llu,\"sd\":%llu}",
mm->start_addr, mm->end_addr, mm->mapped_file, mm->prot_flags,
mm->pss_kb, mm->rss_kb, mm->swapped_kb,
mm->private_clean_kb, mm->private_dirty_kb,
mm->shared_clean_kb, mm->shared_dirty_kb);
if (k < n_mmaps - 1)
fprintf(out_, ", ");
}
fprintf(out_, "]");
}
if (++it != snapshot_.end())
fprintf(out_, "},\n");
else
fprintf(out_, "}}\n");
}
fprintf(out_, "}");
}
void AtraceProcessDump::SerializePersistentProcessInfo() {
fprintf(out_, "\"processes\":{");
for (auto it = processes_.begin(); it != processes_.end();) {
const ProcessInfo* process = it->second.get();
fprintf(out_, "\"%d\":{", process->pid);
fprintf(out_, "\"name\":\"%s\"", process->name);
if (!process->in_kernel) {
fprintf(out_, ",\"exe\":\"%s\",", process->exe);
fprintf(out_, "\"threads\":{\n");
const auto threads = &process->threads;
for (auto thread_it = threads->begin(); thread_it != threads->end();) {
const ThreadInfo* thread = &(thread_it->second);
fprintf(out_, "\"%d\":{", thread->tid);
fprintf(out_, "\"name\":\"%s\"", thread->name);
if (++thread_it != threads->end())
fprintf(out_, "},\n");
else
fprintf(out_, "}\n");
}
fprintf(out_, "}");
}
if (++it != processes_.end())
fprintf(out_, "},\n");
else
fprintf(out_, "}\n");
}
fprintf(out_, "}");
}
void AtraceProcessDump::TakeAndSerializeMemInfo() {
std::map<std::string, uint64_t> mem_info;
CHECK(procfs_utils::ReadMemInfoStats(&mem_info));
fprintf(out_, "{\"ts\":\"%llu\",\"meminfo\":{\n", time_utils::GetTimestamp());
for (auto it = mem_info.begin(); it != mem_info.end(); ++it) {
if (it != mem_info.begin())
fprintf(out_, ",");
fprintf(out_, "\"%s\":%llu", it->first.c_str(), it->second);
}
fprintf(out_, "}}");
}
void AtraceProcessDump::Cleanup() {
processes_.clear();
snapshot_.clear();
full_dump_whitelisted_pids_.clear();
snapshot_timer_ = nullptr;
}
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