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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/ipc/client/command_buffer_proxy_impl.h"
#include <memory>
#include <optional>
#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_macros.h"
#include "base/observer_list.h"
#include "base/rand_util.h"
#include "base/task/sequenced_task_runner.h"
#include "base/timer/elapsed_timer.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "gpu/command_buffer/client/gpu_control_client.h"
#include "gpu/command_buffer/common/cmd_buffer_common.h"
#include "gpu/command_buffer/common/command_buffer_id.h"
#include "gpu/command_buffer/common/command_buffer_shared.h"
#include "gpu/command_buffer/common/gpu_memory_allocation.h"
#include "gpu/command_buffer/common/presentation_feedback_utils.h"
#include "gpu/command_buffer/common/sync_token.h"
#include "gpu/ipc/client/gpu_channel_host.h"
#include "gpu/ipc/common/command_buffer_id.h"
#include "gpu/ipc/common/gpu_channel.mojom.h"
#include "ipc/ipc_mojo_bootstrap.h"
#include "mojo/public/cpp/bindings/sync_call_restrictions.h"
#include "mojo/public/cpp/system/buffer.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/gpu_fence.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gpu_preference.h"
namespace gpu {
CommandBufferProxyImpl::CommandBufferProxyImpl(
scoped_refptr<GpuChannelHost> channel,
int32_t stream_id,
scoped_refptr<base::SequencedTaskRunner> task_runner,
base::SharedMemoryMapper* transfer_buffer_mapper)
: channel_(std::move(channel)),
channel_id_(channel_->channel_id()),
route_id_(channel_->GenerateRouteID()),
stream_id_(stream_id),
command_buffer_id_(
CommandBufferIdFromChannelAndRoute(channel_id_, route_id_)),
callback_thread_(std::move(task_runner)),
transfer_buffer_mapper_(transfer_buffer_mapper) {
DCHECK(route_id_);
}
CommandBufferProxyImpl::~CommandBufferProxyImpl() {
for (auto& observer : deletion_observers_)
observer.OnWillDeleteImpl();
DisconnectChannel();
CancelAllQueries();
}
ContextResult CommandBufferProxyImpl::Initialize(
CommandBufferProxyImpl* share_group,
gpu::SchedulingPriority stream_priority,
const gpu::ContextCreationAttribs& attribs,
const GURL& active_url,
const std::string_view label) {
DCHECK(!share_group || (stream_id_ == share_group->stream_id_));
TRACE_EVENT0("gpu", "GpuChannelHost::CreateViewCommandBuffer");
// Drop the |channel_| if this method does not succeed and early-outs, to
// prevent cleanup on destruction.
auto channel = std::move(channel_);
auto params = mojom::CreateCommandBufferParams::New();
params->share_group_id =
share_group ? share_group->route_id_ : MSG_ROUTING_NONE;
params->stream_id = stream_id_;
params->stream_priority = stream_priority;
params->attribs = attribs;
params->active_url = active_url;
params->label = label;
TRACE_EVENT0("gpu", "CommandBufferProxyImpl::Initialize");
std::tie(shared_state_shm_, shared_state_mapping_) =
AllocateAndMapSharedMemory(sizeof(*shared_state()));
if (!shared_state_shm_.IsValid()) {
DLOG(ERROR) << "ContextResult::kFatalFailure: "
"AllocateAndMapSharedMemory failed";
return ContextResult::kFatalFailure;
}
shared_state()->Initialize();
base::UnsafeSharedMemoryRegion region = shared_state_shm_.Duplicate();
if (!region.IsValid()) {
// TODO(piman): ShareToGpuProcess should alert if it is failing due to
// being out of file descriptors, in which case this is a fatal error
// that won't be recovered from.
LOG(ERROR) << "ContextResult::kTransientFailure: "
"Shared memory region is not valid";
return ContextResult::kTransientFailure;
}
// We're blocking the UI thread, which is generally undesirable.
// In this case we need to wait for this before we can show any UI /anyway/,
// so it won't cause additional jank.
// TODO(piman): Make this asynchronous (http://crbug.com/125248).
ContextResult result = ContextResult::kSuccess;
mojo::SyncCallRestrictions::ScopedAllowSyncCall allow_sync;
IPC::ScopedAllowOffSequenceChannelAssociatedBindings allow_binding;
bool sent = channel->GetGpuChannel().CreateCommandBuffer(
std::move(params), route_id_, std::move(region),
command_buffer_.BindNewEndpointAndPassReceiver(channel->io_task_runner()),
client_receiver_.BindNewEndpointAndPassRemote(callback_thread_), &result,
&capabilities_, &gl_capabilities_);
if (!sent) {
command_buffer_.reset();
client_receiver_.reset();
LOG(ERROR) << "ContextResult::kTransientFailure: "
"Failed to send GpuControl.CreateCommandBuffer.";
return ContextResult::kTransientFailure;
}
if (result != ContextResult::kSuccess) {
command_buffer_.reset();
client_receiver_.reset();
DLOG(ERROR) << "Failure processing GpuControl.CreateCommandBuffer.";
return result;
}
client_receiver_.set_disconnect_handler(base::BindOnce(
&CommandBufferProxyImpl::OnDisconnect, base::Unretained(this)));
channel_ = std::move(channel);
return result;
}
void CommandBufferProxyImpl::OnDisconnect() {
base::AutoLockMaybe lock(lock_.get());
base::AutoLock last_state_lock(last_state_lock_);
gpu::error::ContextLostReason context_lost_reason =
gpu::error::kGpuChannelLost;
if (shared_state_mapping_.IsValid()) {
// The GPU process might have intentionally been crashed
// (exit_on_context_lost), so try to find out the original reason.
TryUpdateStateDontReportError();
if (last_state_.error == gpu::error::kLostContext)
context_lost_reason = last_state_.context_lost_reason;
}
OnGpuAsyncMessageError(context_lost_reason, gpu::error::kLostContext);
}
void CommandBufferProxyImpl::OnDestroyed(gpu::error::ContextLostReason reason,
gpu::error::Error error) {
base::AutoLockMaybe lock(lock_.get());
base::AutoLock last_state_lock(last_state_lock_);
OnGpuAsyncMessageError(reason, error);
}
void CommandBufferProxyImpl::OnConsoleMessage(const std::string& message) {
if (gpu_control_client_)
gpu_control_client_->OnGpuControlErrorMessage(message.c_str(), /*id=*/0);
}
void CommandBufferProxyImpl::OnGpuSwitched(
gl::GpuPreference active_gpu_heuristic) {
if (gpu_control_client_)
gpu_control_client_->OnGpuSwitched(active_gpu_heuristic);
}
void CommandBufferProxyImpl::AddDeletionObserver(DeletionObserver* observer) {
base::AutoLockMaybe lock(lock_.get());
deletion_observers_.AddObserver(observer);
}
void CommandBufferProxyImpl::RemoveDeletionObserver(
DeletionObserver* observer) {
base::AutoLockMaybe lock(lock_.get());
deletion_observers_.RemoveObserver(observer);
}
void CommandBufferProxyImpl::UpdateLastFenceSyncRelease(
uint64_t release_count) {
CheckLock();
if (last_fence_sync_release_ < release_count) {
last_fence_sync_release_ = release_count;
}
}
void CommandBufferProxyImpl::OnSignalAck(uint32_t id,
const CommandBuffer::State& state) {
base::AutoLockMaybe lock(lock_.get());
{
base::AutoLock last_state_lock(last_state_lock_);
SetStateFromMessageReply(state);
if (last_state_.error != gpu::error::kNoError)
return;
}
SignalTaskMap::iterator it = signal_tasks_.find(id);
if (it == signal_tasks_.end()) {
LOG(ERROR) << "Gpu process sent invalid SignalAck.";
base::AutoLock last_state_lock(last_state_lock_);
OnGpuAsyncMessageError(gpu::error::kInvalidGpuMessage,
gpu::error::kLostContext);
return;
}
base::OnceClosure callback = std::move(it->second);
signal_tasks_.erase(it);
std::move(callback).Run();
}
CommandBuffer::State CommandBufferProxyImpl::GetLastState() {
base::AutoLock lock(last_state_lock_);
TryUpdateState();
return last_state_;
}
void CommandBufferProxyImpl::Flush(int32_t put_offset) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError)
return;
TRACE_EVENT1("gpu", "CommandBufferProxyImpl::Flush", "put_offset",
put_offset);
OrderingBarrierHelper(put_offset);
// Don't send messages once disconnected.
if (!disconnected_)
channel_->EnsureFlush(last_flush_id_);
}
void CommandBufferProxyImpl::OrderingBarrier(int32_t put_offset) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError)
return;
TRACE_EVENT1("gpu", "CommandBufferProxyImpl::OrderingBarrier", "put_offset",
put_offset);
OrderingBarrierHelper(put_offset);
}
void CommandBufferProxyImpl::OrderingBarrierHelper(int32_t put_offset) {
DCHECK(has_buffer_);
if (last_put_offset_ == put_offset)
return;
last_put_offset_ = put_offset;
last_flush_id_ = channel_->OrderingBarrier(
route_id_, put_offset, std::move(pending_sync_token_fences_),
last_fence_sync_release_);
}
gpu::CommandBuffer::State CommandBufferProxyImpl::WaitForTokenInRange(
int32_t start,
int32_t end) {
CheckLock();
base::AutoLock lock(last_state_lock_);
TRACE_EVENT2("gpu", "CommandBufferProxyImpl::WaitForToken", "start", start,
"end", end);
// Error needs to be checked in case the state was updated on another thread.
// We need to make sure that the reentrant context loss callback is called so
// that the share group is also lost before we return any error up the stack.
if (last_state_.error != gpu::error::kNoError) {
if (gpu_control_client_)
gpu_control_client_->OnGpuControlLostContextMaybeReentrant();
return last_state_;
}
TryUpdateState();
if (!InRange(start, end, last_state_.token) &&
last_state_.error == gpu::error::kNoError) {
mojo::SyncCallRestrictions::ScopedAllowSyncCall allow_sync;
gpu::CommandBuffer::State state;
if (channel_->GetGpuChannel().WaitForTokenInRange(route_id_, start, end,
&state)) {
SetStateFromMessageReply(state);
}
}
if (!InRange(start, end, last_state_.token) &&
last_state_.error == gpu::error::kNoError) {
LOG(ERROR) << "GPU state invalid after WaitForTokenInRange.";
OnGpuSyncReplyError();
}
return last_state_;
}
gpu::CommandBuffer::State CommandBufferProxyImpl::WaitForGetOffsetInRange(
uint32_t set_get_buffer_count,
int32_t start,
int32_t end) {
CheckLock();
base::AutoLock lock(last_state_lock_);
TRACE_EVENT2("gpu", "CommandBufferProxyImpl::WaitForGetOffset", "start",
start, "end", end);
// Error needs to be checked in case the state was updated on another thread.
// We need to make sure that the reentrant context loss callback is called so
// that the share group is also lost before we return any error up the stack.
if (last_state_.error != gpu::error::kNoError) {
if (gpu_control_client_)
gpu_control_client_->OnGpuControlLostContextMaybeReentrant();
return last_state_;
}
TryUpdateState();
if (((set_get_buffer_count != last_state_.set_get_buffer_count) ||
!InRange(start, end, last_state_.get_offset)) &&
last_state_.error == gpu::error::kNoError) {
mojo::SyncCallRestrictions::ScopedAllowSyncCall allow_sync;
gpu::CommandBuffer::State state;
if (channel_->GetGpuChannel().WaitForGetOffsetInRange(
route_id_, set_get_buffer_count, start, end, &state)) {
SetStateFromMessageReply(state);
}
}
if (((set_get_buffer_count != last_state_.set_get_buffer_count) ||
!InRange(start, end, last_state_.get_offset)) &&
last_state_.error == gpu::error::kNoError) {
LOG(ERROR) << "GPU state invalid after WaitForGetOffsetInRange.";
OnGpuSyncReplyError();
}
return last_state_;
}
void CommandBufferProxyImpl::SetGetBuffer(int32_t shm_id) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError)
return;
command_buffer_->SetGetBuffer(shm_id);
last_put_offset_ = -1;
has_buffer_ = (shm_id > 0);
}
scoped_refptr<gpu::Buffer> CommandBufferProxyImpl::CreateTransferBuffer(
uint32_t size,
int32_t* id,
uint32_t alignment,
TransferBufferAllocationOption option) {
CheckLock();
base::AutoLock lock(last_state_lock_);
*id = -1;
int32_t new_id = GetNextBufferId();
base::UnsafeSharedMemoryRegion shared_memory_region;
base::WritableSharedMemoryMapping shared_memory_mapping;
std::tie(shared_memory_region, shared_memory_mapping) =
AllocateAndMapSharedMemory(size, transfer_buffer_mapper_);
if (!shared_memory_mapping.IsValid()) {
if (last_state_.error == gpu::error::kNoError &&
option != TransferBufferAllocationOption::kReturnNullOnOOM)
OnClientError(gpu::error::kOutOfBounds);
return nullptr;
}
DCHECK_LE(shared_memory_mapping.size(), static_cast<size_t>(UINT32_MAX));
if (last_state_.error == gpu::error::kNoError) {
base::UnsafeSharedMemoryRegion region = shared_memory_region.Duplicate();
if (!region.IsValid()) {
if (last_state_.error == gpu::error::kNoError)
OnClientError(gpu::error::kLostContext);
return nullptr;
}
command_buffer_->RegisterTransferBuffer(new_id, std::move(region));
}
*id = new_id;
scoped_refptr<gpu::Buffer> buffer(gpu::MakeBufferFromSharedMemory(
std::move(shared_memory_region), std::move(shared_memory_mapping)));
return buffer;
}
void CommandBufferProxyImpl::DestroyTransferBuffer(int32_t id) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError)
return;
last_flush_id_ = channel_->EnqueueDeferredMessage(
mojom::DeferredRequestParams::NewCommandBufferRequest(
mojom::DeferredCommandBufferRequest::New(
route_id_, mojom::DeferredCommandBufferRequestParams::
NewDestroyTransferBuffer(id))),
/*sync_token_fences=*/{}, /*release_count=*/0);
}
void CommandBufferProxyImpl::ForceLostContext(error::ContextLostReason reason) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error == gpu::error::kLostContext) {
// Per specification, do nothing if the context is already lost.
return;
}
last_state_.error = gpu::error::kLostContext;
// The caller determines the context lost reason.
last_state_.context_lost_reason = reason;
// Calling code may be in an indeterminate state (possibly including
// being in a GpuControlClient callback), so avoid re-entering the
// GpuControlClient here.
DisconnectChannelInFreshCallStack();
}
void CommandBufferProxyImpl::SetGpuControlClient(GpuControlClient* client) {
CheckLock();
gpu_control_client_ = client;
}
const gpu::Capabilities& CommandBufferProxyImpl::GetCapabilities() const {
return capabilities_;
}
const gpu::GLCapabilities& CommandBufferProxyImpl::GetGLCapabilities() const {
return gl_capabilities_;
}
void CommandBufferProxyImpl::SetLock(base::Lock* lock) {
lock_ = lock;
}
void CommandBufferProxyImpl::EnsureWorkVisible() {
// Don't send messages once disconnected.
if (disconnected_)
return;
constexpr char kEnsureWorkVisible[] = "EnsureWorkVisible";
const base::ElapsedTimer elapsed_timer;
TRACE_EVENT_NESTABLE_ASYNC_BEGIN0("gpu,login", kEnsureWorkVisible,
TRACE_ID_LOCAL(kEnsureWorkVisible));
channel_->VerifyFlush(UINT32_MAX);
TRACE_EVENT_NESTABLE_ASYNC_END0("gpu,login", kEnsureWorkVisible,
TRACE_ID_LOCAL(kEnsureWorkVisible));
if (base::ShouldRecordSubsampledMetric(0.001)) {
GetUMAHistogramEnsureWorkVisibleDuration()->Add(
elapsed_timer.Elapsed().InMicroseconds());
UMA_HISTOGRAM_CUSTOM_TIMES("GPU.EnsureWorkVisibleDurationLowRes",
elapsed_timer.Elapsed(), base::Milliseconds(1),
base::Seconds(5), 100);
}
}
gpu::CommandBufferNamespace CommandBufferProxyImpl::GetNamespaceID() const {
return gpu::CommandBufferNamespace::GPU_IO;
}
gpu::CommandBufferId CommandBufferProxyImpl::GetCommandBufferID() const {
return command_buffer_id_;
}
void CommandBufferProxyImpl::FlushPendingWork() {
// Don't send messages once disconnected.
if (!disconnected_)
channel_->EnsureFlush(UINT32_MAX);
}
uint64_t CommandBufferProxyImpl::GenerateFenceSyncRelease() {
CheckLock();
return ++last_fence_sync_release_;
}
// This can be called from any thread without holding |lock_|. Use a thread-safe
// non-error throwing variant of TryUpdateState for this.
bool CommandBufferProxyImpl::IsFenceSyncReleased(uint64_t release) {
base::AutoLock lock(last_state_lock_);
TryUpdateStateThreadSafe();
return release <= last_state_.release_count;
}
void CommandBufferProxyImpl::SignalSyncToken(const gpu::SyncToken& sync_token,
base::OnceClosure callback) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError)
return;
uint32_t signal_id = next_signal_id_++;
command_buffer_->SignalSyncToken(sync_token, signal_id);
signal_tasks_.insert(std::make_pair(signal_id, std::move(callback)));
}
void CommandBufferProxyImpl::WaitSyncToken(const gpu::SyncToken& sync_token) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError)
return;
pending_sync_token_fences_.push_back(sync_token);
}
bool CommandBufferProxyImpl::CanWaitUnverifiedSyncToken(
const gpu::SyncToken& sync_token) {
// Can only wait on an unverified sync token if it is from the same channel.
int sync_token_channel_id =
ChannelIdFromCommandBufferId(sync_token.command_buffer_id());
if (sync_token.namespace_id() != gpu::CommandBufferNamespace::GPU_IO ||
sync_token_channel_id != channel_id_) {
return false;
}
return true;
}
void CommandBufferProxyImpl::SignalQuery(uint32_t query,
base::OnceClosure callback) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError)
return;
// Signal identifiers are hidden, so nobody outside of this class will see
// them. (And thus, they cannot save them.) The IDs themselves only last
// until the callback is invoked, which will happen as soon as the GPU
// catches upwith the command buffer.
// A malicious caller trying to create a collision by making next_signal_id
// would have to make calls at an astounding rate (300B/s) and even if they
// could do that, all they would do is to prevent some callbacks from getting
// called, leading to stalled threads and/or memory leaks.
uint32_t signal_id = next_signal_id_++;
command_buffer_->SignalQuery(query, signal_id);
signal_tasks_.insert(std::make_pair(signal_id, std::move(callback)));
}
void CommandBufferProxyImpl::CancelAllQueries() {
// Clear all of the signal query callbacks.
signal_tasks_.clear();
}
void CommandBufferProxyImpl::CreateGpuFence(uint32_t gpu_fence_id,
ClientGpuFence source) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError) {
DLOG(ERROR) << "got error=" << last_state_.error;
return;
}
gfx::GpuFence* gpu_fence = gfx::GpuFence::FromClientGpuFence(source);
command_buffer_->CreateGpuFenceFromHandle(
gpu_fence_id, gpu_fence->GetGpuFenceHandle().Clone());
}
void CommandBufferProxyImpl::GetGpuFence(
uint32_t gpu_fence_id,
base::OnceCallback<void(std::unique_ptr<gfx::GpuFence>)> callback) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError) {
DLOG(ERROR) << "got error=" << last_state_.error;
return;
}
command_buffer_->GetGpuFenceHandle(
gpu_fence_id,
base::BindOnce(&CommandBufferProxyImpl::OnGetGpuFenceHandleComplete,
// TODO(crbug.com/40061562): Remove
// `UnsafeDanglingUntriaged`
base::UnsafeDanglingUntriaged(this), gpu_fence_id,
std::move(callback)));
}
void CommandBufferProxyImpl::OnGetGpuFenceHandleComplete(
uint32_t gpu_fence_id,
base::OnceCallback<void(std::unique_ptr<gfx::GpuFence>)> callback,
gfx::GpuFenceHandle handle) {
std::move(callback).Run(std::make_unique<gfx::GpuFence>(std::move(handle)));
}
void CommandBufferProxyImpl::OnReturnData(const std::vector<uint8_t>& data) {
if (gpu_control_client_) {
gpu_control_client_->OnGpuControlReturnData(data);
}
}
void CommandBufferProxyImpl::SetDefaultFramebufferSharedImage(
const gpu::Mailbox& mailbox,
const gpu::SyncToken& sync_token,
int samples_count,
bool preserve,
bool needs_depth,
bool needs_stencil) {
CheckLock();
base::AutoLock lock(last_state_lock_);
if (last_state_.error != gpu::error::kNoError)
return;
last_flush_id_ = channel_->EnqueueDeferredMessage(
mojom::DeferredRequestParams::NewCommandBufferRequest(
mojom::DeferredCommandBufferRequest::New(
route_id_,
mojom::DeferredCommandBufferRequestParams::
NewSetDefaultFramebufferSharedImage(
mojom::SetDefaultFramebufferSharedImageParams::New(
mailbox, samples_count, preserve, needs_depth,
needs_stencil)))),
{sync_token}, /*release_count=*/0);
}
std::pair<base::UnsafeSharedMemoryRegion, base::WritableSharedMemoryMapping>
CommandBufferProxyImpl::AllocateAndMapSharedMemory(
size_t size,
base::SharedMemoryMapper* mapper) {
base::UnsafeSharedMemoryRegion region =
base::UnsafeSharedMemoryRegion::Create(size);
if (!region.IsValid()) {
DLOG(ERROR) << "AllocateAndMapSharedMemory: Allocation failed";
return {};
}
base::WritableSharedMemoryMapping mapping = region.Map(mapper);
if (!mapping.IsValid()) {
DLOG(ERROR) << "AllocateAndMapSharedMemory: Map failed";
return {};
}
return {std::move(region), std::move(mapping)};
}
void CommandBufferProxyImpl::SetStateFromMessageReply(
const gpu::CommandBuffer::State& state) {
CheckLock();
if (last_state_.error != gpu::error::kNoError)
return;
// Handle wraparound. It works as long as we don't have more than 2B state
// updates in flight across which reordering occurs.
if (state.generation - last_state_.generation < 0x80000000U)
last_state_ = state;
if (last_state_.error != gpu::error::kNoError)
OnGpuStateError();
}
void CommandBufferProxyImpl::TryUpdateState() {
CheckLock();
if (last_state_.error == gpu::error::kNoError) {
shared_state()->Read(&last_state_);
if (last_state_.error != gpu::error::kNoError)
OnGpuStateError();
}
}
void CommandBufferProxyImpl::TryUpdateStateThreadSafe() {
if (last_state_.error == gpu::error::kNoError) {
shared_state()->Read(&last_state_);
if (last_state_.error != gpu::error::kNoError) {
callback_thread_->PostTask(
FROM_HERE,
base::BindOnce(&CommandBufferProxyImpl::LockAndDisconnectChannel,
weak_ptr_factory_.GetWeakPtr()));
}
}
}
void CommandBufferProxyImpl::TryUpdateStateDontReportError() {
if (last_state_.error == gpu::error::kNoError)
shared_state()->Read(&last_state_);
}
const gpu::CommandBufferSharedState* CommandBufferProxyImpl::shared_state()
const {
return reinterpret_cast<const gpu::CommandBufferSharedState*>(
shared_state_mapping_.memory());
}
base::HistogramBase*
CommandBufferProxyImpl::GetUMAHistogramEnsureWorkVisibleDuration() {
if (!uma_histogram_ensure_work_visible_duration_) {
// Combine two linear histograms:
// 1/4 ms buckets in 0..15ms = 60 buckets
// 1/4 s buckets in 25ms .. 30s = 120 buckets
// This gives good cardinality for both VSYNC intervals and 30s watchdog:
// 0.00 ms
// 0.25 ms
// 0.50 ms
// 0.75 ms
// 1.00 ms
// 1.25 ms
// 1.50 ms
// ...
// 14.00 ms
// 14.25 ms
// 14.50 ms
// 14.75 ms
// 15.00 ms
// 0.25 s
// 0.50 s
// 0.75 s
// 1.00 s
// 1.25 s
// 1.50 s
// ...
// 29.00 s
// 29.25 s
// 29.50 s
// 29.75 s
//
// Histogram values are in microseconds.
std::vector<base::HistogramBase::Sample32> intervals;
constexpr base::HistogramBase::Sample32 k15Milliseconds = 15 * 1000;
constexpr base::HistogramBase::Sample32 k30Seconds = 30 * 1000 * 1000;
constexpr int kFirstPartCount = 60;
constexpr int kSecondPartCount = 120;
intervals.reserve(kFirstPartCount + kSecondPartCount);
for (int i = 0; i <= kFirstPartCount; ++i) {
intervals.push_back(k15Milliseconds /
static_cast<float>(kFirstPartCount) * i);
}
// 0 index was already populated by the first part.
for (int i = 1; i < kSecondPartCount; ++i) {
intervals.push_back(k30Seconds / static_cast<float>(kSecondPartCount) *
i);
}
uma_histogram_ensure_work_visible_duration_ =
base::CustomHistogram::FactoryGet(
"GPU.EnsureWorkVisibleDuration", intervals,
base::HistogramBase::kUmaTargetedHistogramFlag);
}
return uma_histogram_ensure_work_visible_duration_;
}
void CommandBufferProxyImpl::OnGpuSyncReplyError() {
CheckLock();
last_state_.error = gpu::error::kLostContext;
// This error typically happens while waiting for a synchronous
// reply from the GPU process because the GPU process crashed.
// Report this as a lost GPU channel rather than invalid GPU message.
last_state_.context_lost_reason = gpu::error::kGpuChannelLost;
// This method may be inside a callstack from the GpuControlClient (we got a
// bad reply to something we are sending to the GPU process). So avoid
// re-entering the GpuControlClient here.
DisconnectChannelInFreshCallStack();
}
void CommandBufferProxyImpl::OnGpuAsyncMessageError(
gpu::error::ContextLostReason reason,
gpu::error::Error error) {
CheckLock();
last_state_.error = error;
last_state_.context_lost_reason = reason;
// This method only occurs when receiving IPC messages, so we know it's not in
// a callstack from the GpuControlClient. Unlock the state lock to prevent
// a deadlock when calling the context loss callback.
base::AutoUnlock unlock(last_state_lock_);
DisconnectChannel();
}
void CommandBufferProxyImpl::OnGpuStateError() {
CheckLock();
DCHECK_NE(gpu::error::kNoError, last_state_.error);
// This method may be inside a callstack from the GpuControlClient (we
// encountered an error while trying to perform some action). So avoid
// re-entering the GpuControlClient here.
DisconnectChannelInFreshCallStack();
}
void CommandBufferProxyImpl::OnClientError(gpu::error::Error error) {
CheckLock();
last_state_.error = error;
last_state_.context_lost_reason = gpu::error::kUnknown;
// This method may be inside a callstack from the GpuControlClient (we
// encountered an error while trying to perform some action). So avoid
// re-entering the GpuControlClient here.
DisconnectChannelInFreshCallStack();
}
void CommandBufferProxyImpl::DisconnectChannelInFreshCallStack() {
CheckLock();
// Inform the GpuControlClient of the lost state immediately, though this may
// be a re-entrant call to the client so we use the MaybeReentrant variant.
if (gpu_control_client_)
gpu_control_client_->OnGpuControlLostContextMaybeReentrant();
// Create a fresh call stack to keep the |channel_| alive while we unwind the
// stack in case things will use it, and give the GpuChannelClient a chance to
// act fully on the lost context.
callback_thread_->PostTask(
FROM_HERE,
base::BindOnce(&CommandBufferProxyImpl::LockAndDisconnectChannel,
weak_ptr_factory_.GetWeakPtr()));
}
void CommandBufferProxyImpl::LockAndDisconnectChannel() {
base::AutoLockMaybe lock(lock_.get());
DisconnectChannel();
}
void CommandBufferProxyImpl::DisconnectChannel() {
CheckLock();
// Prevent any further messages from being sent, and ensure we only call
// the client for lost context a single time.
if (!channel_ || disconnected_)
return;
disconnected_ = true;
channel_->VerifyFlush(UINT32_MAX);
mojo::SyncCallRestrictions::ScopedAllowSyncCall allow_sync;
channel_->GetGpuChannel().DestroyCommandBuffer(route_id_);
if (gpu_control_client_)
gpu_control_client_->OnGpuControlLostContext();
}
} // namespace gpu
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