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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 <time.h>
#include <unistd.h>
#include <thread>
#include "base/android/library_loader/anchor_functions.h"
#include "base/logging.h"
#include "build/build_config.h"
#include "tools/cygprofile/lightweight_cygprofile.h"
#if !defined(ARCH_CPU_ARMEL)
#error Only supported on ARM.
#endif // !defined(ARCH_CPU_ARMEL)
namespace cygprofile {
namespace {
// Disables the recording of addresses after |kDelayInSeconds| and dumps the
// result to a file.
class DelayedDumper {
public:
DelayedDumper() {
// Not using base::TimeTicks() to not call too many base:: symbol that would
// pollute the reached symbols dumps.
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts))
PLOG(FATAL) << "clock_gettime.";
uint64_t start_ns_since_epoch =
static_cast<uint64_t>(ts.tv_sec) * 1000 * 1000 * 1000 + ts.tv_nsec;
int pid = getpid();
std::thread([pid, start_ns_since_epoch]() {
sleep(kInitialDelayInSeconds);
while (!SwitchToNextPhaseOrDump(pid, start_ns_since_epoch))
sleep(kDelayInSeconds);
})
.detach();
}
static constexpr int kDelayInSeconds = 30;
static constexpr int kInitialDelayInSeconds =
kPhases == 1 ? kDelayInSeconds : 5;
};
// Static initializer on purpose. Will disable instrumentation after
// |kDelayInSeconds|.
DelayedDumper g_dump_later;
} // namespace
} // namespace cygprofile
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