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// Copyright (c) 2013 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 "content/child/child_shared_bitmap_manager.h"
#include <stddef.h>
#include <utility>
#include "base/debug/alias.h"
#include "base/memory/ptr_util.h"
#include "base/process/memory.h"
#include "base/process/process_metrics.h"
#include "build/build_config.h"
#include "content/child/child_thread_impl.h"
#include "content/common/child_process_messages.h"
#include "ui/gfx/geometry/size.h"
namespace content {
namespace {
class ChildSharedBitmap : public SharedMemoryBitmap {
public:
ChildSharedBitmap(scoped_refptr<ThreadSafeSender> sender,
base::SharedMemory* shared_memory,
const cc::SharedBitmapId& id)
: SharedMemoryBitmap(static_cast<uint8_t*>(shared_memory->memory()),
id,
shared_memory),
sender_(sender) {}
ChildSharedBitmap(scoped_refptr<ThreadSafeSender> sender,
std::unique_ptr<base::SharedMemory> shared_memory_holder,
const cc::SharedBitmapId& id)
: ChildSharedBitmap(sender, shared_memory_holder.get(), id) {
shared_memory_holder_ = std::move(shared_memory_holder);
}
~ChildSharedBitmap() override {
sender_->Send(new ChildProcessHostMsg_DeletedSharedBitmap(id()));
}
private:
scoped_refptr<ThreadSafeSender> sender_;
std::unique_ptr<base::SharedMemory> shared_memory_holder_;
};
// Collect extra information for debugging bitmap creation failures.
void CollectMemoryUsageAndDie(const gfx::Size& size, size_t alloc_size) {
#if defined(OS_WIN)
int width = size.width();
int height = size.height();
DWORD last_error = GetLastError();
std::unique_ptr<base::ProcessMetrics> metrics(
base::ProcessMetrics::CreateProcessMetrics(
base::GetCurrentProcessHandle()));
size_t private_bytes = 0;
size_t shared_bytes = 0;
metrics->GetMemoryBytes(&private_bytes, &shared_bytes);
base::debug::Alias(&width);
base::debug::Alias(&height);
base::debug::Alias(&last_error);
base::debug::Alias(&private_bytes);
base::debug::Alias(&shared_bytes);
#endif
base::TerminateBecauseOutOfMemory(alloc_size);
}
} // namespace
SharedMemoryBitmap::SharedMemoryBitmap(uint8_t* pixels,
const cc::SharedBitmapId& id,
base::SharedMemory* shared_memory)
: SharedBitmap(pixels, id), shared_memory_(shared_memory) {}
ChildSharedBitmapManager::ChildSharedBitmapManager(
scoped_refptr<ThreadSafeSender> sender)
: sender_(sender) {
}
ChildSharedBitmapManager::~ChildSharedBitmapManager() {}
std::unique_ptr<cc::SharedBitmap>
ChildSharedBitmapManager::AllocateSharedBitmap(const gfx::Size& size) {
std::unique_ptr<SharedMemoryBitmap> bitmap = AllocateSharedMemoryBitmap(size);
#if defined(OS_POSIX)
// Close file descriptor to avoid running out.
if (bitmap)
bitmap->shared_memory()->Close();
#endif
return std::move(bitmap);
}
std::unique_ptr<SharedMemoryBitmap>
ChildSharedBitmapManager::AllocateSharedMemoryBitmap(const gfx::Size& size) {
TRACE_EVENT2("renderer",
"ChildSharedBitmapManager::AllocateSharedMemoryBitmap", "width",
size.width(), "height", size.height());
size_t memory_size;
if (!cc::SharedBitmap::SizeInBytes(size, &memory_size))
return std::unique_ptr<SharedMemoryBitmap>();
cc::SharedBitmapId id = cc::SharedBitmap::GenerateId();
std::unique_ptr<base::SharedMemory> memory;
#if defined(OS_POSIX)
base::SharedMemoryHandle handle;
bool send_success =
sender_->Send(new ChildProcessHostMsg_SyncAllocateSharedBitmap(
memory_size, id, &handle));
if (!send_success)
return nullptr;
memory = base::WrapUnique(new base::SharedMemory(handle, false));
if (!memory->Map(memory_size))
CollectMemoryUsageAndDie(size, memory_size);
#else
bool out_of_memory;
memory = ChildThreadImpl::AllocateSharedMemory(memory_size, sender_.get(),
&out_of_memory);
if (!memory) {
if (out_of_memory)
CollectMemoryUsageAndDie(size, memory_size);
else
return nullptr;
}
if (!memory->Map(memory_size))
CollectMemoryUsageAndDie(size, memory_size);
base::SharedMemoryHandle handle_to_send = memory->handle();
sender_->Send(new ChildProcessHostMsg_AllocatedSharedBitmap(
memory_size, handle_to_send, id));
#endif
return base::WrapUnique(
new ChildSharedBitmap(sender_, std::move(memory), id));
}
std::unique_ptr<cc::SharedBitmap>
ChildSharedBitmapManager::GetSharedBitmapFromId(const gfx::Size&,
const cc::SharedBitmapId&) {
NOTREACHED();
return std::unique_ptr<cc::SharedBitmap>();
}
std::unique_ptr<cc::SharedBitmap>
ChildSharedBitmapManager::GetBitmapForSharedMemory(base::SharedMemory* mem) {
cc::SharedBitmapId id = cc::SharedBitmap::GenerateId();
base::SharedMemoryHandle handle_to_send = mem->handle();
#if defined(OS_POSIX)
if (!mem->ShareToProcess(base::GetCurrentProcessHandle(), &handle_to_send))
return std::unique_ptr<cc::SharedBitmap>();
#endif
sender_->Send(new ChildProcessHostMsg_AllocatedSharedBitmap(
mem->mapped_size(), handle_to_send, id));
return base::WrapUnique(new ChildSharedBitmap(sender_, mem, id));
}
} // namespace content
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