/*
|
* 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.
|
*/
|
|
#define ATRACE_TAG ATRACE_TAG_DALVIK
|
|
#include "palette/palette.h"
|
|
#include <errno.h>
|
#include <sys/resource.h>
|
#include <sys/time.h>
|
#include <unistd.h>
|
|
#include <mutex>
|
|
#include <android-base/file.h>
|
#include <android-base/logging.h>
|
#include <android-base/macros.h>
|
#include <cutils/sched_policy.h>
|
#include <cutils/trace.h>
|
#include <log/event_tag_map.h>
|
#include <tombstoned/tombstoned.h>
|
#include <utils/Thread.h>
|
|
#include "palette_system.h"
|
|
enum PaletteStatus PaletteGetVersion(int32_t* version) {
|
*version = art::palette::kPaletteVersion;
|
return PaletteStatus::kOkay;
|
}
|
|
// Conversion map for "nice" values.
|
//
|
// We use Android thread priority constants to be consistent with the rest
|
// of the system. In some cases adjacent entries may overlap.
|
//
|
static const int kNiceValues[art::palette::kNumManagedThreadPriorities] = {
|
ANDROID_PRIORITY_LOWEST, // 1 (MIN_PRIORITY)
|
ANDROID_PRIORITY_BACKGROUND + 6,
|
ANDROID_PRIORITY_BACKGROUND + 3,
|
ANDROID_PRIORITY_BACKGROUND,
|
ANDROID_PRIORITY_NORMAL, // 5 (NORM_PRIORITY)
|
ANDROID_PRIORITY_NORMAL - 2,
|
ANDROID_PRIORITY_NORMAL - 4,
|
ANDROID_PRIORITY_URGENT_DISPLAY + 3,
|
ANDROID_PRIORITY_URGENT_DISPLAY + 2,
|
ANDROID_PRIORITY_URGENT_DISPLAY // 10 (MAX_PRIORITY)
|
};
|
|
enum PaletteStatus PaletteSchedSetPriority(int32_t tid, int32_t managed_priority) {
|
if (managed_priority < art::palette::kMinManagedThreadPriority ||
|
managed_priority > art::palette::kMaxManagedThreadPriority) {
|
return PaletteStatus::kInvalidArgument;
|
}
|
int new_nice = kNiceValues[managed_priority - art::palette::kMinManagedThreadPriority];
|
|
// TODO: b/18249098 The code below is broken. It uses getpriority() as a proxy for whether a
|
// thread is already in the SP_FOREGROUND cgroup. This is not necessarily true for background
|
// processes, where all threads are in the SP_BACKGROUND cgroup. This means that callers will
|
// have to call setPriority twice to do what they want :
|
//
|
// Thread.setPriority(Thread.MIN_PRIORITY); // no-op wrt to cgroups
|
// Thread.setPriority(Thread.MAX_PRIORITY); // will actually change cgroups.
|
if (new_nice >= ANDROID_PRIORITY_BACKGROUND) {
|
set_sched_policy(tid, SP_BACKGROUND);
|
} else if (getpriority(PRIO_PROCESS, tid) >= ANDROID_PRIORITY_BACKGROUND) {
|
set_sched_policy(tid, SP_FOREGROUND);
|
}
|
|
if (setpriority(PRIO_PROCESS, tid, new_nice) != 0) {
|
return PaletteStatus::kCheckErrno;
|
}
|
return PaletteStatus::kOkay;
|
}
|
|
enum PaletteStatus PaletteSchedGetPriority(int32_t tid, /*out*/int32_t* managed_priority) {
|
errno = 0;
|
int native_priority = getpriority(PRIO_PROCESS, tid);
|
if (native_priority == -1 && errno != 0) {
|
*managed_priority = art::palette::kNormalManagedThreadPriority;
|
return PaletteStatus::kCheckErrno;
|
}
|
|
for (int p = art::palette::kMinManagedThreadPriority;
|
p <= art::palette::kMaxManagedThreadPriority;
|
p = p + 1) {
|
int index = p - art::palette::kMinManagedThreadPriority;
|
if (native_priority >= kNiceValues[index]) {
|
*managed_priority = p;
|
return PaletteStatus::kOkay;
|
}
|
}
|
*managed_priority = art::palette::kMaxManagedThreadPriority;
|
return PaletteStatus::kOkay;
|
}
|
|
enum PaletteStatus PaletteWriteCrashThreadStacks(/*in*/const char* stacks, size_t stacks_len) {
|
android::base::unique_fd tombstone_fd;
|
android::base::unique_fd output_fd;
|
|
if (!tombstoned_connect(getpid(), &tombstone_fd, &output_fd, kDebuggerdJavaBacktrace)) {
|
// Failure here could be due to file descriptor resource exhaustion
|
// so write the stack trace message to the log in case it helps
|
// debug that.
|
LOG(INFO) << std::string_view(stacks, stacks_len);
|
// tombstoned_connect() logs failure reason.
|
return PaletteStatus::kFailedCheckLog;
|
}
|
|
PaletteStatus status = PaletteStatus::kOkay;
|
if (!android::base::WriteFully(output_fd, stacks, stacks_len)) {
|
PLOG(ERROR) << "Failed to write tombstoned output";
|
TEMP_FAILURE_RETRY(ftruncate(output_fd, 0));
|
status = PaletteStatus::kFailedCheckLog;
|
}
|
|
if (TEMP_FAILURE_RETRY(fdatasync(output_fd)) == -1 && errno != EINVAL) {
|
// Ignore EINVAL so we don't report failure if we just tried to flush a pipe
|
// or socket.
|
if (status == PaletteStatus::kOkay) {
|
PLOG(ERROR) << "Failed to fsync tombstoned output";
|
status = PaletteStatus::kFailedCheckLog;
|
}
|
TEMP_FAILURE_RETRY(ftruncate(output_fd, 0));
|
TEMP_FAILURE_RETRY(fdatasync(output_fd));
|
}
|
|
if (close(output_fd.release()) == -1 && errno != EINTR) {
|
if (status == PaletteStatus::kOkay) {
|
PLOG(ERROR) << "Failed to close tombstoned output";
|
status = PaletteStatus::kFailedCheckLog;
|
}
|
}
|
|
if (!tombstoned_notify_completion(tombstone_fd)) {
|
// tombstoned_notify_completion() logs failure.
|
status = PaletteStatus::kFailedCheckLog;
|
}
|
|
return status;
|
}
|
|
enum PaletteStatus PaletteTraceEnabled(/*out*/int32_t* enabled) {
|
*enabled = (ATRACE_ENABLED() != 0) ? 1 : 0;
|
return PaletteStatus::kOkay;
|
}
|
|
enum PaletteStatus PaletteTraceBegin(const char* name) {
|
ATRACE_BEGIN(name);
|
return PaletteStatus::kOkay;
|
}
|
|
enum PaletteStatus PaletteTraceEnd() {
|
ATRACE_END();
|
return PaletteStatus::kOkay;
|
}
|
|
enum PaletteStatus PaletteTraceIntegerValue(const char* name, int32_t value) {
|
ATRACE_INT(name, value);
|
return PaletteStatus::kOkay;
|
}
|
