1703 lines
46 KiB
C++
1703 lines
46 KiB
C++
/*
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* Copyright (C) 2005 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "Parcel"
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//#define LOG_NDEBUG 0
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#include <binder/Parcel.h>
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#include <binder/IPCThreadState.h>
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#include <binder/Binder.h>
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#include <binder/BpBinder.h>
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#include <binder/ProcessState.h>
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#include <binder/TextOutput.h>
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#include <errno.h>
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#include <utils/Debug.h>
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#include <utils/Log.h>
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#include <utils/String8.h>
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#include <utils/String16.h>
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#include <utils/misc.h>
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#include <utils/Flattenable.h>
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#include <cutils/ashmem.h>
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#include <private/binder/binder_module.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#ifndef INT32_MAX
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#define INT32_MAX ((int32_t)(2147483647))
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#endif
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#define LOG_REFS(...)
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//#define LOG_REFS(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__)
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// ---------------------------------------------------------------------------
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#define PAD_SIZE(s) (((s)+3)&~3)
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// Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER
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#define STRICT_MODE_PENALTY_GATHER 0x100
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// Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER
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#define EX_HAS_REPLY_HEADER -128
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// Maximum size of a blob to transfer in-place.
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static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024;
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// XXX This can be made public if we want to provide
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// support for typed data.
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struct small_flat_data
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{
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uint32_t type;
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uint32_t data;
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};
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namespace android {
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void acquire_object(const sp<ProcessState>& proc,
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const flat_binder_object& obj, const void* who)
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{
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switch (obj.type) {
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case BINDER_TYPE_BINDER:
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if (obj.binder) {
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LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie);
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reinterpret_cast<IBinder*>(obj.cookie)->incStrong(who);
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}
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return;
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case BINDER_TYPE_WEAK_BINDER:
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if (obj.binder)
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reinterpret_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who);
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return;
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case BINDER_TYPE_HANDLE: {
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const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle);
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if (b != NULL) {
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LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get());
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b->incStrong(who);
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}
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return;
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}
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case BINDER_TYPE_WEAK_HANDLE: {
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const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle);
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if (b != NULL) b.get_refs()->incWeak(who);
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return;
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}
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case BINDER_TYPE_FD: {
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// intentionally blank -- nothing to do to acquire this, but we do
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// recognize it as a legitimate object type.
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return;
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}
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}
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ALOGD("Invalid object type 0x%08x", obj.type);
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}
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void release_object(const sp<ProcessState>& proc,
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const flat_binder_object& obj, const void* who)
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{
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switch (obj.type) {
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case BINDER_TYPE_BINDER:
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if (obj.binder) {
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LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie);
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reinterpret_cast<IBinder*>(obj.cookie)->decStrong(who);
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}
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return;
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case BINDER_TYPE_WEAK_BINDER:
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if (obj.binder)
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reinterpret_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who);
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return;
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case BINDER_TYPE_HANDLE: {
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const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle);
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if (b != NULL) {
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LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get());
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b->decStrong(who);
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}
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return;
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}
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case BINDER_TYPE_WEAK_HANDLE: {
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const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle);
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if (b != NULL) b.get_refs()->decWeak(who);
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return;
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}
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case BINDER_TYPE_FD: {
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if (obj.cookie != 0) close(obj.handle);
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return;
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}
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}
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ALOGE("Invalid object type 0x%08x", obj.type);
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}
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inline static status_t finish_flatten_binder(
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const sp<IBinder>& /*binder*/, const flat_binder_object& flat, Parcel* out)
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{
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return out->writeObject(flat, false);
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}
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status_t flatten_binder(const sp<ProcessState>& /*proc*/,
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const sp<IBinder>& binder, Parcel* out)
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{
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flat_binder_object obj;
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obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
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if (binder != NULL) {
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IBinder *local = binder->localBinder();
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if (!local) {
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BpBinder *proxy = binder->remoteBinder();
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if (proxy == NULL) {
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ALOGE("null proxy");
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}
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const int32_t handle = proxy ? proxy->handle() : 0;
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obj.type = BINDER_TYPE_HANDLE;
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obj.binder = 0; /* Don't pass uninitialized stack data to a remote process */
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obj.handle = handle;
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obj.cookie = 0;
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} else {
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obj.type = BINDER_TYPE_BINDER;
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obj.binder = reinterpret_cast<uintptr_t>(local->getWeakRefs());
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obj.cookie = reinterpret_cast<uintptr_t>(local);
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}
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} else {
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obj.type = BINDER_TYPE_BINDER;
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obj.binder = 0;
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obj.cookie = 0;
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}
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return finish_flatten_binder(binder, obj, out);
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}
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status_t flatten_binder(const sp<ProcessState>& /*proc*/,
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const wp<IBinder>& binder, Parcel* out)
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{
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flat_binder_object obj;
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obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
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if (binder != NULL) {
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sp<IBinder> real = binder.promote();
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if (real != NULL) {
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IBinder *local = real->localBinder();
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if (!local) {
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BpBinder *proxy = real->remoteBinder();
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if (proxy == NULL) {
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ALOGE("null proxy");
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}
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const int32_t handle = proxy ? proxy->handle() : 0;
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obj.type = BINDER_TYPE_WEAK_HANDLE;
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obj.binder = 0; /* Don't pass uninitialized stack data to a remote process */
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obj.handle = handle;
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obj.cookie = 0;
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} else {
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obj.type = BINDER_TYPE_WEAK_BINDER;
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obj.binder = reinterpret_cast<uintptr_t>(binder.get_refs());
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obj.cookie = reinterpret_cast<uintptr_t>(binder.unsafe_get());
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}
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return finish_flatten_binder(real, obj, out);
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}
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// XXX How to deal? In order to flatten the given binder,
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// we need to probe it for information, which requires a primary
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// reference... but we don't have one.
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//
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// The OpenBinder implementation uses a dynamic_cast<> here,
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// but we can't do that with the different reference counting
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// implementation we are using.
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ALOGE("Unable to unflatten Binder weak reference!");
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obj.type = BINDER_TYPE_BINDER;
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obj.binder = 0;
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obj.cookie = 0;
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return finish_flatten_binder(NULL, obj, out);
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} else {
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obj.type = BINDER_TYPE_BINDER;
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obj.binder = 0;
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obj.cookie = 0;
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return finish_flatten_binder(NULL, obj, out);
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}
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}
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inline static status_t finish_unflatten_binder(
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BpBinder* /*proxy*/, const flat_binder_object& /*flat*/,
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const Parcel& /*in*/)
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{
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return NO_ERROR;
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}
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status_t unflatten_binder(const sp<ProcessState>& proc,
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const Parcel& in, sp<IBinder>* out)
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{
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const flat_binder_object* flat = in.readObject(false);
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if (flat) {
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switch (flat->type) {
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case BINDER_TYPE_BINDER:
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*out = reinterpret_cast<IBinder*>(flat->cookie);
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return finish_unflatten_binder(NULL, *flat, in);
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case BINDER_TYPE_HANDLE:
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*out = proc->getStrongProxyForHandle(flat->handle);
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return finish_unflatten_binder(
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static_cast<BpBinder*>(out->get()), *flat, in);
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}
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}
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return BAD_TYPE;
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}
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status_t unflatten_binder(const sp<ProcessState>& proc,
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const Parcel& in, wp<IBinder>* out)
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{
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const flat_binder_object* flat = in.readObject(false);
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if (flat) {
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switch (flat->type) {
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case BINDER_TYPE_BINDER:
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*out = reinterpret_cast<IBinder*>(flat->cookie);
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return finish_unflatten_binder(NULL, *flat, in);
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case BINDER_TYPE_WEAK_BINDER:
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if (flat->binder != 0) {
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out->set_object_and_refs(
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reinterpret_cast<IBinder*>(flat->cookie),
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reinterpret_cast<RefBase::weakref_type*>(flat->binder));
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} else {
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*out = NULL;
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}
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return finish_unflatten_binder(NULL, *flat, in);
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case BINDER_TYPE_HANDLE:
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case BINDER_TYPE_WEAK_HANDLE:
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*out = proc->getWeakProxyForHandle(flat->handle);
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return finish_unflatten_binder(
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static_cast<BpBinder*>(out->unsafe_get()), *flat, in);
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}
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}
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return BAD_TYPE;
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}
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// ---------------------------------------------------------------------------
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Parcel::Parcel()
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{
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initState();
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}
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Parcel::~Parcel()
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{
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freeDataNoInit();
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}
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const uint8_t* Parcel::data() const
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{
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return mData;
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}
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size_t Parcel::dataSize() const
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{
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return (mDataSize > mDataPos ? mDataSize : mDataPos);
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}
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size_t Parcel::dataAvail() const
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{
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// TODO: decide what to do about the possibility that this can
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// report an available-data size that exceeds a Java int's max
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// positive value, causing havoc. Fortunately this will only
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// happen if someone constructs a Parcel containing more than two
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// gigabytes of data, which on typical phone hardware is simply
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// not possible.
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return dataSize() - dataPosition();
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}
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size_t Parcel::dataPosition() const
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{
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return mDataPos;
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}
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size_t Parcel::dataCapacity() const
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{
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return mDataCapacity;
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}
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status_t Parcel::setDataSize(size_t size)
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{
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status_t err;
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err = continueWrite(size);
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if (err == NO_ERROR) {
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mDataSize = size;
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ALOGV("setDataSize Setting data size of %p to %zu", this, mDataSize);
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}
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return err;
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}
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void Parcel::setDataPosition(size_t pos) const
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{
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mDataPos = pos;
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mNextObjectHint = 0;
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}
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status_t Parcel::setDataCapacity(size_t size)
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{
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if (size > mDataCapacity) return continueWrite(size);
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return NO_ERROR;
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}
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status_t Parcel::setData(const uint8_t* buffer, size_t len)
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{
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status_t err = restartWrite(len);
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if (err == NO_ERROR) {
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memcpy(const_cast<uint8_t*>(data()), buffer, len);
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mDataSize = len;
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mFdsKnown = false;
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}
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return err;
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}
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status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len)
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{
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const sp<ProcessState> proc(ProcessState::self());
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status_t err;
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const uint8_t *data = parcel->mData;
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const binder_size_t *objects = parcel->mObjects;
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size_t size = parcel->mObjectsSize;
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int startPos = mDataPos;
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int firstIndex = -1, lastIndex = -2;
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if (len == 0) {
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return NO_ERROR;
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}
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// range checks against the source parcel size
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if ((offset > parcel->mDataSize)
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|| (len > parcel->mDataSize)
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|| (offset + len > parcel->mDataSize)) {
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return BAD_VALUE;
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}
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// Count objects in range
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for (int i = 0; i < (int) size; i++) {
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size_t off = objects[i];
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if ((off >= offset) && (off < offset + len)) {
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if (firstIndex == -1) {
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firstIndex = i;
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}
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lastIndex = i;
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}
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}
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int numObjects = lastIndex - firstIndex + 1;
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if ((mDataSize+len) > mDataCapacity) {
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// grow data
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err = growData(len);
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if (err != NO_ERROR) {
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return err;
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}
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}
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// append data
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memcpy(mData + mDataPos, data + offset, len);
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mDataPos += len;
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mDataSize += len;
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err = NO_ERROR;
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if (numObjects > 0) {
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// grow objects
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if (mObjectsCapacity < mObjectsSize + numObjects) {
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int newSize = ((mObjectsSize + numObjects)*3)/2;
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binder_size_t *objects =
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(binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t));
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if (objects == (binder_size_t*)0) {
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return NO_MEMORY;
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}
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mObjects = objects;
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mObjectsCapacity = newSize;
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}
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// append and acquire objects
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int idx = mObjectsSize;
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for (int i = firstIndex; i <= lastIndex; i++) {
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size_t off = objects[i] - offset + startPos;
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mObjects[idx++] = off;
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mObjectsSize++;
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flat_binder_object* flat
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= reinterpret_cast<flat_binder_object*>(mData + off);
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acquire_object(proc, *flat, this);
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if (flat->type == BINDER_TYPE_FD) {
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// If this is a file descriptor, we need to dup it so the
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// new Parcel now owns its own fd, and can declare that we
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// officially know we have fds.
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flat->handle = dup(flat->handle);
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flat->cookie = 1;
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mHasFds = mFdsKnown = true;
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if (!mAllowFds) {
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err = FDS_NOT_ALLOWED;
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}
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}
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}
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}
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return err;
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}
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bool Parcel::pushAllowFds(bool allowFds)
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{
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const bool origValue = mAllowFds;
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if (!allowFds) {
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mAllowFds = false;
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}
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return origValue;
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}
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void Parcel::restoreAllowFds(bool lastValue)
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{
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mAllowFds = lastValue;
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}
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bool Parcel::hasFileDescriptors() const
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{
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if (!mFdsKnown) {
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scanForFds();
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}
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return mHasFds;
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}
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// Write RPC headers. (previously just the interface token)
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status_t Parcel::writeInterfaceToken(const String16& interface)
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{
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writeInt32(IPCThreadState::self()->getStrictModePolicy() |
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STRICT_MODE_PENALTY_GATHER);
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// currently the interface identification token is just its name as a string
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return writeString16(interface);
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}
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bool Parcel::checkInterface(IBinder* binder) const
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{
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return enforceInterface(binder->getInterfaceDescriptor());
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}
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bool Parcel::enforceInterface(const String16& interface,
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IPCThreadState* threadState) const
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{
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int32_t strictPolicy = readInt32();
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if (threadState == NULL) {
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threadState = IPCThreadState::self();
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}
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if ((threadState->getLastTransactionBinderFlags() &
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IBinder::FLAG_ONEWAY) != 0) {
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// For one-way calls, the callee is running entirely
|
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// disconnected from the caller, so disable StrictMode entirely.
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// Not only does disk/network usage not impact the caller, but
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// there's no way to commuicate back any violations anyway.
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threadState->setStrictModePolicy(0);
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} else {
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threadState->setStrictModePolicy(strictPolicy);
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}
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const String16 str(readString16());
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if (str == interface) {
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return true;
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} else {
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ALOGW("**** enforceInterface() expected '%s' but read '%s'",
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String8(interface).string(), String8(str).string());
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return false;
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}
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}
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const binder_size_t* Parcel::objects() const
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{
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return mObjects;
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}
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size_t Parcel::objectsCount() const
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{
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return mObjectsSize;
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}
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status_t Parcel::errorCheck() const
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{
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return mError;
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}
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|
|
void Parcel::setError(status_t err)
|
|
{
|
|
mError = err;
|
|
}
|
|
|
|
status_t Parcel::finishWrite(size_t len)
|
|
{
|
|
//printf("Finish write of %d\n", len);
|
|
mDataPos += len;
|
|
ALOGV("finishWrite Setting data pos of %p to %zu", this, mDataPos);
|
|
if (mDataPos > mDataSize) {
|
|
mDataSize = mDataPos;
|
|
ALOGV("finishWrite Setting data size of %p to %zu", this, mDataSize);
|
|
}
|
|
//printf("New pos=%d, size=%d\n", mDataPos, mDataSize);
|
|
return NO_ERROR;
|
|
}
|
|
|
|
status_t Parcel::writeUnpadded(const void* data, size_t len)
|
|
{
|
|
size_t end = mDataPos + len;
|
|
if (end < mDataPos) {
|
|
// integer overflow
|
|
return BAD_VALUE;
|
|
}
|
|
|
|
if (end <= mDataCapacity) {
|
|
restart_write:
|
|
memcpy(mData+mDataPos, data, len);
|
|
return finishWrite(len);
|
|
}
|
|
|
|
status_t err = growData(len);
|
|
if (err == NO_ERROR) goto restart_write;
|
|
return err;
|
|
}
|
|
|
|
status_t Parcel::write(const void* data, size_t len)
|
|
{
|
|
void* const d = writeInplace(len);
|
|
if (d) {
|
|
memcpy(d, data, len);
|
|
return NO_ERROR;
|
|
}
|
|
return mError;
|
|
}
|
|
|
|
void* Parcel::writeInplace(size_t len)
|
|
{
|
|
const size_t padded = PAD_SIZE(len);
|
|
|
|
// sanity check for integer overflow
|
|
if (mDataPos+padded < mDataPos) {
|
|
return NULL;
|
|
}
|
|
|
|
if ((mDataPos+padded) <= mDataCapacity) {
|
|
restart_write:
|
|
//printf("Writing %ld bytes, padded to %ld\n", len, padded);
|
|
uint8_t* const data = mData+mDataPos;
|
|
|
|
// Need to pad at end?
|
|
if (padded != len) {
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
static const uint32_t mask[4] = {
|
|
0x00000000, 0xffffff00, 0xffff0000, 0xff000000
|
|
};
|
|
#endif
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
static const uint32_t mask[4] = {
|
|
0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff
|
|
};
|
|
#endif
|
|
//printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len],
|
|
// *reinterpret_cast<void**>(data+padded-4));
|
|
*reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len];
|
|
}
|
|
|
|
finishWrite(padded);
|
|
return data;
|
|
}
|
|
|
|
status_t err = growData(padded);
|
|
if (err == NO_ERROR) goto restart_write;
|
|
return NULL;
|
|
}
|
|
|
|
status_t Parcel::writeInt32(int32_t val)
|
|
{
|
|
return writeAligned(val);
|
|
}
|
|
status_t Parcel::writeInt32Array(size_t len, const int32_t *val) {
|
|
if (!val) {
|
|
return writeAligned(-1);
|
|
}
|
|
status_t ret = writeAligned(len);
|
|
if (ret == NO_ERROR) {
|
|
ret = write(val, len * sizeof(*val));
|
|
}
|
|
return ret;
|
|
}
|
|
status_t Parcel::writeByteArray(size_t len, const uint8_t *val) {
|
|
if (!val) {
|
|
return writeAligned(-1);
|
|
}
|
|
status_t ret = writeAligned(len);
|
|
if (ret == NO_ERROR) {
|
|
ret = write(val, len * sizeof(*val));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
status_t Parcel::writeInt64(int64_t val)
|
|
{
|
|
return writeAligned(val);
|
|
}
|
|
|
|
status_t Parcel::writePointer(uintptr_t val)
|
|
{
|
|
return writeAligned<binder_uintptr_t>(val);
|
|
}
|
|
|
|
status_t Parcel::writeFloat(float val)
|
|
{
|
|
return writeAligned(val);
|
|
}
|
|
|
|
#if defined(__mips__) && defined(__mips_hard_float)
|
|
|
|
status_t Parcel::writeDouble(double val)
|
|
{
|
|
union {
|
|
double d;
|
|
unsigned long long ll;
|
|
} u;
|
|
u.d = val;
|
|
return writeAligned(u.ll);
|
|
}
|
|
|
|
#else
|
|
|
|
status_t Parcel::writeDouble(double val)
|
|
{
|
|
return writeAligned(val);
|
|
}
|
|
|
|
#endif
|
|
|
|
status_t Parcel::writeIntPtr(intptr_t val)
|
|
{
|
|
return writeAligned(val);
|
|
}
|
|
|
|
status_t Parcel::writeCString(const char* str)
|
|
{
|
|
return write(str, strlen(str)+1);
|
|
}
|
|
|
|
status_t Parcel::writeString8(const String8& str)
|
|
{
|
|
status_t err = writeInt32(str.bytes());
|
|
// only write string if its length is more than zero characters,
|
|
// as readString8 will only read if the length field is non-zero.
|
|
// this is slightly different from how writeString16 works.
|
|
if (str.bytes() > 0 && err == NO_ERROR) {
|
|
err = write(str.string(), str.bytes()+1);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
status_t Parcel::writeString16(const String16& str)
|
|
{
|
|
return writeString16(str.string(), str.size());
|
|
}
|
|
|
|
status_t Parcel::writeString16(const char16_t* str, size_t len)
|
|
{
|
|
if (str == NULL) return writeInt32(-1);
|
|
|
|
status_t err = writeInt32(len);
|
|
if (err == NO_ERROR) {
|
|
len *= sizeof(char16_t);
|
|
uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t));
|
|
if (data) {
|
|
memcpy(data, str, len);
|
|
*reinterpret_cast<char16_t*>(data+len) = 0;
|
|
return NO_ERROR;
|
|
}
|
|
err = mError;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
status_t Parcel::writeStrongBinder(const sp<IBinder>& val)
|
|
{
|
|
return flatten_binder(ProcessState::self(), val, this);
|
|
}
|
|
|
|
status_t Parcel::writeWeakBinder(const wp<IBinder>& val)
|
|
{
|
|
return flatten_binder(ProcessState::self(), val, this);
|
|
}
|
|
|
|
status_t Parcel::writeNativeHandle(const native_handle* handle)
|
|
{
|
|
if (!handle || handle->version != sizeof(native_handle))
|
|
return BAD_TYPE;
|
|
|
|
status_t err;
|
|
err = writeInt32(handle->numFds);
|
|
if (err != NO_ERROR) return err;
|
|
|
|
err = writeInt32(handle->numInts);
|
|
if (err != NO_ERROR) return err;
|
|
|
|
for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++)
|
|
err = writeDupFileDescriptor(handle->data[i]);
|
|
|
|
if (err != NO_ERROR) {
|
|
ALOGD("write native handle, write dup fd failed");
|
|
return err;
|
|
}
|
|
err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts);
|
|
return err;
|
|
}
|
|
|
|
status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership)
|
|
{
|
|
flat_binder_object obj;
|
|
obj.type = BINDER_TYPE_FD;
|
|
obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
|
|
obj.binder = 0; /* Don't pass uninitialized stack data to a remote process */
|
|
obj.handle = fd;
|
|
obj.cookie = takeOwnership ? 1 : 0;
|
|
return writeObject(obj, true);
|
|
}
|
|
|
|
status_t Parcel::writeDupFileDescriptor(int fd)
|
|
{
|
|
int dupFd = dup(fd);
|
|
if (dupFd < 0) {
|
|
return -errno;
|
|
}
|
|
status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/);
|
|
if (err) {
|
|
close(dupFd);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob)
|
|
{
|
|
status_t status;
|
|
|
|
if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) {
|
|
ALOGV("writeBlob: write in place");
|
|
status = writeInt32(0);
|
|
if (status) return status;
|
|
|
|
void* ptr = writeInplace(len);
|
|
if (!ptr) return NO_MEMORY;
|
|
|
|
outBlob->init(false /*mapped*/, ptr, len);
|
|
return NO_ERROR;
|
|
}
|
|
|
|
ALOGV("writeBlob: write to ashmem");
|
|
int fd = ashmem_create_region("Parcel Blob", len);
|
|
if (fd < 0) return NO_MEMORY;
|
|
|
|
int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE);
|
|
if (result < 0) {
|
|
status = result;
|
|
} else {
|
|
void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
|
|
if (ptr == MAP_FAILED) {
|
|
status = -errno;
|
|
} else {
|
|
result = ashmem_set_prot_region(fd, PROT_READ);
|
|
if (result < 0) {
|
|
status = result;
|
|
} else {
|
|
status = writeInt32(1);
|
|
if (!status) {
|
|
status = writeFileDescriptor(fd, true /*takeOwnership*/);
|
|
if (!status) {
|
|
outBlob->init(true /*mapped*/, ptr, len);
|
|
return NO_ERROR;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
::munmap(ptr, len);
|
|
}
|
|
::close(fd);
|
|
return status;
|
|
}
|
|
|
|
status_t Parcel::write(const FlattenableHelperInterface& val)
|
|
{
|
|
status_t err;
|
|
|
|
// size if needed
|
|
const size_t len = val.getFlattenedSize();
|
|
const size_t fd_count = val.getFdCount();
|
|
|
|
err = this->writeInt32(len);
|
|
if (err) return err;
|
|
|
|
err = this->writeInt32(fd_count);
|
|
if (err) return err;
|
|
|
|
// payload
|
|
void* const buf = this->writeInplace(PAD_SIZE(len));
|
|
if (buf == NULL)
|
|
return BAD_VALUE;
|
|
|
|
int* fds = NULL;
|
|
if (fd_count) {
|
|
fds = new int[fd_count];
|
|
}
|
|
|
|
err = val.flatten(buf, len, fds, fd_count);
|
|
for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) {
|
|
err = this->writeDupFileDescriptor( fds[i] );
|
|
}
|
|
|
|
if (fd_count) {
|
|
delete [] fds;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData)
|
|
{
|
|
const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity;
|
|
const bool enoughObjects = mObjectsSize < mObjectsCapacity;
|
|
if (enoughData && enoughObjects) {
|
|
restart_write:
|
|
*reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val;
|
|
|
|
// Need to write meta-data?
|
|
if (nullMetaData || val.binder != 0) {
|
|
mObjects[mObjectsSize] = mDataPos;
|
|
acquire_object(ProcessState::self(), val, this);
|
|
mObjectsSize++;
|
|
}
|
|
|
|
// remember if it's a file descriptor
|
|
if (val.type == BINDER_TYPE_FD) {
|
|
if (!mAllowFds) {
|
|
return FDS_NOT_ALLOWED;
|
|
}
|
|
mHasFds = mFdsKnown = true;
|
|
}
|
|
|
|
return finishWrite(sizeof(flat_binder_object));
|
|
}
|
|
|
|
if (!enoughData) {
|
|
const status_t err = growData(sizeof(val));
|
|
if (err != NO_ERROR) return err;
|
|
}
|
|
if (!enoughObjects) {
|
|
size_t newSize = ((mObjectsSize+2)*3)/2;
|
|
binder_size_t* objects = (binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t));
|
|
if (objects == NULL) return NO_MEMORY;
|
|
mObjects = objects;
|
|
mObjectsCapacity = newSize;
|
|
}
|
|
|
|
goto restart_write;
|
|
}
|
|
|
|
status_t Parcel::writeNoException()
|
|
{
|
|
return writeInt32(0);
|
|
}
|
|
|
|
void Parcel::remove(size_t /*start*/, size_t /*amt*/)
|
|
{
|
|
LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!");
|
|
}
|
|
|
|
status_t Parcel::read(void* outData, size_t len) const
|
|
{
|
|
if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize
|
|
&& len <= PAD_SIZE(len)) {
|
|
memcpy(outData, mData+mDataPos, len);
|
|
mDataPos += PAD_SIZE(len);
|
|
ALOGV("read Setting data pos of %p to %zu", this, mDataPos);
|
|
return NO_ERROR;
|
|
}
|
|
return NOT_ENOUGH_DATA;
|
|
}
|
|
|
|
const void* Parcel::readInplace(size_t len) const
|
|
{
|
|
if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize
|
|
&& len <= PAD_SIZE(len)) {
|
|
const void* data = mData+mDataPos;
|
|
mDataPos += PAD_SIZE(len);
|
|
ALOGV("readInplace Setting data pos of %p to %zu", this, mDataPos);
|
|
return data;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
template<class T>
|
|
status_t Parcel::readAligned(T *pArg) const {
|
|
COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T));
|
|
|
|
if ((mDataPos+sizeof(T)) <= mDataSize) {
|
|
const void* data = mData+mDataPos;
|
|
mDataPos += sizeof(T);
|
|
*pArg = *reinterpret_cast<const T*>(data);
|
|
return NO_ERROR;
|
|
} else {
|
|
return NOT_ENOUGH_DATA;
|
|
}
|
|
}
|
|
|
|
template<class T>
|
|
T Parcel::readAligned() const {
|
|
T result;
|
|
if (readAligned(&result) != NO_ERROR) {
|
|
result = 0;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
template<class T>
|
|
status_t Parcel::writeAligned(T val) {
|
|
COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T));
|
|
|
|
if ((mDataPos+sizeof(val)) <= mDataCapacity) {
|
|
restart_write:
|
|
*reinterpret_cast<T*>(mData+mDataPos) = val;
|
|
return finishWrite(sizeof(val));
|
|
}
|
|
|
|
status_t err = growData(sizeof(val));
|
|
if (err == NO_ERROR) goto restart_write;
|
|
return err;
|
|
}
|
|
|
|
status_t Parcel::readInt32(int32_t *pArg) const
|
|
{
|
|
return readAligned(pArg);
|
|
}
|
|
|
|
int32_t Parcel::readInt32() const
|
|
{
|
|
return readAligned<int32_t>();
|
|
}
|
|
|
|
|
|
status_t Parcel::readInt64(int64_t *pArg) const
|
|
{
|
|
return readAligned(pArg);
|
|
}
|
|
|
|
|
|
int64_t Parcel::readInt64() const
|
|
{
|
|
return readAligned<int64_t>();
|
|
}
|
|
|
|
status_t Parcel::readPointer(uintptr_t *pArg) const
|
|
{
|
|
status_t ret;
|
|
binder_uintptr_t ptr;
|
|
ret = readAligned(&ptr);
|
|
if (!ret)
|
|
*pArg = ptr;
|
|
return ret;
|
|
}
|
|
|
|
uintptr_t Parcel::readPointer() const
|
|
{
|
|
return readAligned<binder_uintptr_t>();
|
|
}
|
|
|
|
|
|
status_t Parcel::readFloat(float *pArg) const
|
|
{
|
|
return readAligned(pArg);
|
|
}
|
|
|
|
|
|
float Parcel::readFloat() const
|
|
{
|
|
return readAligned<float>();
|
|
}
|
|
|
|
#if defined(__mips__) && defined(__mips_hard_float)
|
|
|
|
status_t Parcel::readDouble(double *pArg) const
|
|
{
|
|
union {
|
|
double d;
|
|
unsigned long long ll;
|
|
} u;
|
|
u.d = 0;
|
|
status_t status;
|
|
status = readAligned(&u.ll);
|
|
*pArg = u.d;
|
|
return status;
|
|
}
|
|
|
|
double Parcel::readDouble() const
|
|
{
|
|
union {
|
|
double d;
|
|
unsigned long long ll;
|
|
} u;
|
|
u.ll = readAligned<unsigned long long>();
|
|
return u.d;
|
|
}
|
|
|
|
#else
|
|
|
|
status_t Parcel::readDouble(double *pArg) const
|
|
{
|
|
return readAligned(pArg);
|
|
}
|
|
|
|
double Parcel::readDouble() const
|
|
{
|
|
return readAligned<double>();
|
|
}
|
|
|
|
#endif
|
|
|
|
status_t Parcel::readIntPtr(intptr_t *pArg) const
|
|
{
|
|
return readAligned(pArg);
|
|
}
|
|
|
|
|
|
intptr_t Parcel::readIntPtr() const
|
|
{
|
|
return readAligned<intptr_t>();
|
|
}
|
|
|
|
|
|
const char* Parcel::readCString() const
|
|
{
|
|
const size_t avail = mDataSize-mDataPos;
|
|
if (avail > 0) {
|
|
const char* str = reinterpret_cast<const char*>(mData+mDataPos);
|
|
// is the string's trailing NUL within the parcel's valid bounds?
|
|
const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail));
|
|
if (eos) {
|
|
const size_t len = eos - str;
|
|
mDataPos += PAD_SIZE(len+1);
|
|
ALOGV("readCString Setting data pos of %p to %zu", this, mDataPos);
|
|
return str;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
String8 Parcel::readString8() const
|
|
{
|
|
int32_t size = readInt32();
|
|
// watch for potential int overflow adding 1 for trailing NUL
|
|
if (size > 0 && size < INT32_MAX) {
|
|
const char* str = (const char*)readInplace(size+1);
|
|
if (str) return String8(str, size);
|
|
}
|
|
return String8();
|
|
}
|
|
|
|
String16 Parcel::readString16() const
|
|
{
|
|
size_t len;
|
|
const char16_t* str = readString16Inplace(&len);
|
|
if (str) return String16(str, len);
|
|
ALOGE("Reading a NULL string not supported here.");
|
|
return String16();
|
|
}
|
|
|
|
const char16_t* Parcel::readString16Inplace(size_t* outLen) const
|
|
{
|
|
int32_t size = readInt32();
|
|
// watch for potential int overflow from size+1
|
|
if (size >= 0 && size < INT32_MAX) {
|
|
*outLen = size;
|
|
const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t));
|
|
if (str != NULL) {
|
|
return str;
|
|
}
|
|
}
|
|
*outLen = 0;
|
|
return NULL;
|
|
}
|
|
|
|
sp<IBinder> Parcel::readStrongBinder() const
|
|
{
|
|
sp<IBinder> val;
|
|
unflatten_binder(ProcessState::self(), *this, &val);
|
|
return val;
|
|
}
|
|
|
|
wp<IBinder> Parcel::readWeakBinder() const
|
|
{
|
|
wp<IBinder> val;
|
|
unflatten_binder(ProcessState::self(), *this, &val);
|
|
return val;
|
|
}
|
|
|
|
int32_t Parcel::readExceptionCode() const
|
|
{
|
|
int32_t exception_code = readAligned<int32_t>();
|
|
if (exception_code == EX_HAS_REPLY_HEADER) {
|
|
int32_t header_start = dataPosition();
|
|
int32_t header_size = readAligned<int32_t>();
|
|
// Skip over fat responses headers. Not used (or propagated) in
|
|
// native code
|
|
setDataPosition(header_start + header_size);
|
|
// And fat response headers are currently only used when there are no
|
|
// exceptions, so return no error:
|
|
return 0;
|
|
}
|
|
return exception_code;
|
|
}
|
|
|
|
native_handle* Parcel::readNativeHandle() const
|
|
{
|
|
int numFds, numInts;
|
|
status_t err;
|
|
err = readInt32(&numFds);
|
|
if (err != NO_ERROR) return 0;
|
|
err = readInt32(&numInts);
|
|
if (err != NO_ERROR) return 0;
|
|
|
|
native_handle* h = native_handle_create(numFds, numInts);
|
|
for (int i=0 ; err==NO_ERROR && i<numFds ; i++) {
|
|
h->data[i] = dup(readFileDescriptor());
|
|
if (h->data[i] < 0) err = BAD_VALUE;
|
|
}
|
|
err = read(h->data + numFds, sizeof(int)*numInts);
|
|
if (err != NO_ERROR) {
|
|
native_handle_close(h);
|
|
native_handle_delete(h);
|
|
h = 0;
|
|
}
|
|
return h;
|
|
}
|
|
|
|
|
|
int Parcel::readFileDescriptor() const
|
|
{
|
|
const flat_binder_object* flat = readObject(true);
|
|
if (flat) {
|
|
switch (flat->type) {
|
|
case BINDER_TYPE_FD:
|
|
//ALOGI("Returning file descriptor %ld from parcel %p", flat->handle, this);
|
|
return flat->handle;
|
|
}
|
|
}
|
|
return BAD_TYPE;
|
|
}
|
|
|
|
status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const
|
|
{
|
|
int32_t useAshmem;
|
|
status_t status = readInt32(&useAshmem);
|
|
if (status) return status;
|
|
|
|
if (!useAshmem) {
|
|
ALOGV("readBlob: read in place");
|
|
const void* ptr = readInplace(len);
|
|
if (!ptr) return BAD_VALUE;
|
|
|
|
outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len);
|
|
return NO_ERROR;
|
|
}
|
|
|
|
ALOGV("readBlob: read from ashmem");
|
|
int fd = readFileDescriptor();
|
|
if (fd == int(BAD_TYPE)) return BAD_VALUE;
|
|
|
|
void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
|
|
if (!ptr) return NO_MEMORY;
|
|
|
|
outBlob->init(true /*mapped*/, ptr, len);
|
|
return NO_ERROR;
|
|
}
|
|
|
|
status_t Parcel::read(FlattenableHelperInterface& val) const
|
|
{
|
|
// size
|
|
const size_t len = this->readInt32();
|
|
const size_t fd_count = this->readInt32();
|
|
|
|
// payload
|
|
void const* const buf = this->readInplace(PAD_SIZE(len));
|
|
if (buf == NULL)
|
|
return BAD_VALUE;
|
|
|
|
int* fds = NULL;
|
|
if (fd_count) {
|
|
fds = new int[fd_count];
|
|
}
|
|
|
|
status_t err = NO_ERROR;
|
|
for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) {
|
|
fds[i] = dup(this->readFileDescriptor());
|
|
if (fds[i] < 0) {
|
|
err = BAD_VALUE;
|
|
ALOGE("dup() failed in Parcel::read, i is %zu, fds[i] is %d, fd_count is %zu, error: %s",
|
|
i, fds[i], fd_count, strerror(errno));
|
|
}
|
|
}
|
|
|
|
if (err == NO_ERROR) {
|
|
err = val.unflatten(buf, len, fds, fd_count);
|
|
}
|
|
|
|
if (fd_count) {
|
|
delete [] fds;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
const flat_binder_object* Parcel::readObject(bool nullMetaData) const
|
|
{
|
|
const size_t DPOS = mDataPos;
|
|
if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) {
|
|
const flat_binder_object* obj
|
|
= reinterpret_cast<const flat_binder_object*>(mData+DPOS);
|
|
mDataPos = DPOS + sizeof(flat_binder_object);
|
|
if (!nullMetaData && (obj->cookie == 0 && obj->binder == 0)) {
|
|
// When transferring a NULL object, we don't write it into
|
|
// the object list, so we don't want to check for it when
|
|
// reading.
|
|
ALOGV("readObject Setting data pos of %p to %zu", this, mDataPos);
|
|
return obj;
|
|
}
|
|
|
|
// Ensure that this object is valid...
|
|
binder_size_t* const OBJS = mObjects;
|
|
const size_t N = mObjectsSize;
|
|
size_t opos = mNextObjectHint;
|
|
|
|
if (N > 0) {
|
|
ALOGV("Parcel %p looking for obj at %zu, hint=%zu",
|
|
this, DPOS, opos);
|
|
|
|
// Start at the current hint position, looking for an object at
|
|
// the current data position.
|
|
if (opos < N) {
|
|
while (opos < (N-1) && OBJS[opos] < DPOS) {
|
|
opos++;
|
|
}
|
|
} else {
|
|
opos = N-1;
|
|
}
|
|
if (OBJS[opos] == DPOS) {
|
|
// Found it!
|
|
ALOGV("Parcel %p found obj %zu at index %zu with forward search",
|
|
this, DPOS, opos);
|
|
mNextObjectHint = opos+1;
|
|
ALOGV("readObject Setting data pos of %p to %zu", this, mDataPos);
|
|
return obj;
|
|
}
|
|
|
|
// Look backwards for it...
|
|
while (opos > 0 && OBJS[opos] > DPOS) {
|
|
opos--;
|
|
}
|
|
if (OBJS[opos] == DPOS) {
|
|
// Found it!
|
|
ALOGV("Parcel %p found obj %zu at index %zu with backward search",
|
|
this, DPOS, opos);
|
|
mNextObjectHint = opos+1;
|
|
ALOGV("readObject Setting data pos of %p to %zu", this, mDataPos);
|
|
return obj;
|
|
}
|
|
}
|
|
ALOGW("Attempt to read object from Parcel %p at offset %zu that is not in the object list",
|
|
this, DPOS);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void Parcel::closeFileDescriptors()
|
|
{
|
|
size_t i = mObjectsSize;
|
|
if (i > 0) {
|
|
//ALOGI("Closing file descriptors for %zu objects...", i);
|
|
}
|
|
while (i > 0) {
|
|
i--;
|
|
const flat_binder_object* flat
|
|
= reinterpret_cast<flat_binder_object*>(mData+mObjects[i]);
|
|
if (flat->type == BINDER_TYPE_FD) {
|
|
//ALOGI("Closing fd: %ld", flat->handle);
|
|
close(flat->handle);
|
|
}
|
|
}
|
|
}
|
|
|
|
uintptr_t Parcel::ipcData() const
|
|
{
|
|
return reinterpret_cast<uintptr_t>(mData);
|
|
}
|
|
|
|
size_t Parcel::ipcDataSize() const
|
|
{
|
|
return (mDataSize > mDataPos ? mDataSize : mDataPos);
|
|
}
|
|
|
|
uintptr_t Parcel::ipcObjects() const
|
|
{
|
|
return reinterpret_cast<uintptr_t>(mObjects);
|
|
}
|
|
|
|
size_t Parcel::ipcObjectsCount() const
|
|
{
|
|
return mObjectsSize;
|
|
}
|
|
|
|
void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize,
|
|
const binder_size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie)
|
|
{
|
|
binder_size_t minOffset = 0;
|
|
freeDataNoInit();
|
|
mError = NO_ERROR;
|
|
mData = const_cast<uint8_t*>(data);
|
|
mDataSize = mDataCapacity = dataSize;
|
|
//ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)", this, mDataSize, getpid());
|
|
mDataPos = 0;
|
|
ALOGV("setDataReference Setting data pos of %p to %zu", this, mDataPos);
|
|
mObjects = const_cast<binder_size_t*>(objects);
|
|
mObjectsSize = mObjectsCapacity = objectsCount;
|
|
mNextObjectHint = 0;
|
|
mOwner = relFunc;
|
|
mOwnerCookie = relCookie;
|
|
for (size_t i = 0; i < mObjectsSize; i++) {
|
|
binder_size_t offset = mObjects[i];
|
|
if (offset < minOffset) {
|
|
ALOGE("%s: bad object offset %"PRIu64" < %"PRIu64"\n",
|
|
__func__, (uint64_t)offset, (uint64_t)minOffset);
|
|
mObjectsSize = 0;
|
|
break;
|
|
}
|
|
minOffset = offset + sizeof(flat_binder_object);
|
|
}
|
|
scanForFds();
|
|
}
|
|
|
|
void Parcel::print(TextOutput& to, uint32_t /*flags*/) const
|
|
{
|
|
to << "Parcel(";
|
|
|
|
if (errorCheck() != NO_ERROR) {
|
|
const status_t err = errorCheck();
|
|
to << "Error: " << (void*)(intptr_t)err << " \"" << strerror(-err) << "\"";
|
|
} else if (dataSize() > 0) {
|
|
const uint8_t* DATA = data();
|
|
to << indent << HexDump(DATA, dataSize()) << dedent;
|
|
const binder_size_t* OBJS = objects();
|
|
const size_t N = objectsCount();
|
|
for (size_t i=0; i<N; i++) {
|
|
const flat_binder_object* flat
|
|
= reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]);
|
|
to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": "
|
|
<< TypeCode(flat->type & 0x7f7f7f00)
|
|
<< " = " << flat->binder;
|
|
}
|
|
} else {
|
|
to << "NULL";
|
|
}
|
|
|
|
to << ")";
|
|
}
|
|
|
|
void Parcel::releaseObjects()
|
|
{
|
|
const sp<ProcessState> proc(ProcessState::self());
|
|
size_t i = mObjectsSize;
|
|
uint8_t* const data = mData;
|
|
binder_size_t* const objects = mObjects;
|
|
while (i > 0) {
|
|
i--;
|
|
const flat_binder_object* flat
|
|
= reinterpret_cast<flat_binder_object*>(data+objects[i]);
|
|
release_object(proc, *flat, this);
|
|
}
|
|
}
|
|
|
|
void Parcel::acquireObjects()
|
|
{
|
|
const sp<ProcessState> proc(ProcessState::self());
|
|
size_t i = mObjectsSize;
|
|
uint8_t* const data = mData;
|
|
binder_size_t* const objects = mObjects;
|
|
while (i > 0) {
|
|
i--;
|
|
const flat_binder_object* flat
|
|
= reinterpret_cast<flat_binder_object*>(data+objects[i]);
|
|
acquire_object(proc, *flat, this);
|
|
}
|
|
}
|
|
|
|
void Parcel::freeData()
|
|
{
|
|
freeDataNoInit();
|
|
initState();
|
|
}
|
|
|
|
void Parcel::freeDataNoInit()
|
|
{
|
|
if (mOwner) {
|
|
//ALOGI("Freeing data ref of %p (pid=%d)", this, getpid());
|
|
mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie);
|
|
} else {
|
|
releaseObjects();
|
|
if (mData) free(mData);
|
|
if (mObjects) free(mObjects);
|
|
}
|
|
}
|
|
|
|
status_t Parcel::growData(size_t len)
|
|
{
|
|
size_t newSize = ((mDataSize+len)*3)/2;
|
|
return (newSize <= mDataSize)
|
|
? (status_t) NO_MEMORY
|
|
: continueWrite(newSize);
|
|
}
|
|
|
|
status_t Parcel::restartWrite(size_t desired)
|
|
{
|
|
if (mOwner) {
|
|
freeData();
|
|
return continueWrite(desired);
|
|
}
|
|
|
|
uint8_t* data = (uint8_t*)realloc(mData, desired);
|
|
if (!data && desired > mDataCapacity) {
|
|
mError = NO_MEMORY;
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
releaseObjects();
|
|
|
|
if (data) {
|
|
mData = data;
|
|
mDataCapacity = desired;
|
|
}
|
|
|
|
mDataSize = mDataPos = 0;
|
|
ALOGV("restartWrite Setting data size of %p to %zu", this, mDataSize);
|
|
ALOGV("restartWrite Setting data pos of %p to %zu", this, mDataPos);
|
|
|
|
free(mObjects);
|
|
mObjects = NULL;
|
|
mObjectsSize = mObjectsCapacity = 0;
|
|
mNextObjectHint = 0;
|
|
mHasFds = false;
|
|
mFdsKnown = true;
|
|
mAllowFds = true;
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
status_t Parcel::continueWrite(size_t desired)
|
|
{
|
|
// If shrinking, first adjust for any objects that appear
|
|
// after the new data size.
|
|
size_t objectsSize = mObjectsSize;
|
|
if (desired < mDataSize) {
|
|
if (desired == 0) {
|
|
objectsSize = 0;
|
|
} else {
|
|
while (objectsSize > 0) {
|
|
if (mObjects[objectsSize-1] < desired)
|
|
break;
|
|
objectsSize--;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mOwner) {
|
|
// If the size is going to zero, just release the owner's data.
|
|
if (desired == 0) {
|
|
freeData();
|
|
return NO_ERROR;
|
|
}
|
|
|
|
// If there is a different owner, we need to take
|
|
// posession.
|
|
uint8_t* data = (uint8_t*)malloc(desired);
|
|
if (!data) {
|
|
mError = NO_MEMORY;
|
|
return NO_MEMORY;
|
|
}
|
|
binder_size_t* objects = NULL;
|
|
|
|
if (objectsSize) {
|
|
objects = (binder_size_t*)malloc(objectsSize*sizeof(binder_size_t));
|
|
if (!objects) {
|
|
free(data);
|
|
|
|
mError = NO_MEMORY;
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
// Little hack to only acquire references on objects
|
|
// we will be keeping.
|
|
size_t oldObjectsSize = mObjectsSize;
|
|
mObjectsSize = objectsSize;
|
|
acquireObjects();
|
|
mObjectsSize = oldObjectsSize;
|
|
}
|
|
|
|
if (mData) {
|
|
memcpy(data, mData, mDataSize < desired ? mDataSize : desired);
|
|
}
|
|
if (objects && mObjects) {
|
|
memcpy(objects, mObjects, objectsSize*sizeof(binder_size_t));
|
|
}
|
|
//ALOGI("Freeing data ref of %p (pid=%d)", this, getpid());
|
|
mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie);
|
|
mOwner = NULL;
|
|
|
|
mData = data;
|
|
mObjects = objects;
|
|
mDataSize = (mDataSize < desired) ? mDataSize : desired;
|
|
ALOGV("continueWrite Setting data size of %p to %zu", this, mDataSize);
|
|
mDataCapacity = desired;
|
|
mObjectsSize = mObjectsCapacity = objectsSize;
|
|
mNextObjectHint = 0;
|
|
|
|
} else if (mData) {
|
|
if (objectsSize < mObjectsSize) {
|
|
// Need to release refs on any objects we are dropping.
|
|
const sp<ProcessState> proc(ProcessState::self());
|
|
for (size_t i=objectsSize; i<mObjectsSize; i++) {
|
|
const flat_binder_object* flat
|
|
= reinterpret_cast<flat_binder_object*>(mData+mObjects[i]);
|
|
if (flat->type == BINDER_TYPE_FD) {
|
|
// will need to rescan because we may have lopped off the only FDs
|
|
mFdsKnown = false;
|
|
}
|
|
release_object(proc, *flat, this);
|
|
}
|
|
binder_size_t* objects =
|
|
(binder_size_t*)realloc(mObjects, objectsSize*sizeof(binder_size_t));
|
|
if (objects) {
|
|
mObjects = objects;
|
|
}
|
|
mObjectsSize = objectsSize;
|
|
mNextObjectHint = 0;
|
|
}
|
|
|
|
// We own the data, so we can just do a realloc().
|
|
if (desired > mDataCapacity) {
|
|
uint8_t* data = (uint8_t*)realloc(mData, desired);
|
|
if (data) {
|
|
mData = data;
|
|
mDataCapacity = desired;
|
|
} else if (desired > mDataCapacity) {
|
|
mError = NO_MEMORY;
|
|
return NO_MEMORY;
|
|
}
|
|
} else {
|
|
if (mDataSize > desired) {
|
|
mDataSize = desired;
|
|
ALOGV("continueWrite Setting data size of %p to %zu", this, mDataSize);
|
|
}
|
|
if (mDataPos > desired) {
|
|
mDataPos = desired;
|
|
ALOGV("continueWrite Setting data pos of %p to %zu", this, mDataPos);
|
|
}
|
|
}
|
|
|
|
} else {
|
|
// This is the first data. Easy!
|
|
uint8_t* data = (uint8_t*)malloc(desired);
|
|
if (!data) {
|
|
mError = NO_MEMORY;
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
if(!(mDataCapacity == 0 && mObjects == NULL
|
|
&& mObjectsCapacity == 0)) {
|
|
ALOGE("continueWrite: %zu/%p/%zu/%zu", mDataCapacity, mObjects, mObjectsCapacity, desired);
|
|
}
|
|
|
|
mData = data;
|
|
mDataSize = mDataPos = 0;
|
|
ALOGV("continueWrite Setting data size of %p to %zu", this, mDataSize);
|
|
ALOGV("continueWrite Setting data pos of %p to %zu", this, mDataPos);
|
|
mDataCapacity = desired;
|
|
}
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
void Parcel::initState()
|
|
{
|
|
mError = NO_ERROR;
|
|
mData = 0;
|
|
mDataSize = 0;
|
|
mDataCapacity = 0;
|
|
mDataPos = 0;
|
|
ALOGV("initState Setting data size of %p to %zu", this, mDataSize);
|
|
ALOGV("initState Setting data pos of %p to %zu", this, mDataPos);
|
|
mObjects = NULL;
|
|
mObjectsSize = 0;
|
|
mObjectsCapacity = 0;
|
|
mNextObjectHint = 0;
|
|
mHasFds = false;
|
|
mFdsKnown = true;
|
|
mAllowFds = true;
|
|
mOwner = NULL;
|
|
}
|
|
|
|
void Parcel::scanForFds() const
|
|
{
|
|
bool hasFds = false;
|
|
for (size_t i=0; i<mObjectsSize; i++) {
|
|
const flat_binder_object* flat
|
|
= reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]);
|
|
if (flat->type == BINDER_TYPE_FD) {
|
|
hasFds = true;
|
|
break;
|
|
}
|
|
}
|
|
mHasFds = hasFds;
|
|
mFdsKnown = true;
|
|
}
|
|
|
|
// --- Parcel::Blob ---
|
|
|
|
Parcel::Blob::Blob() :
|
|
mMapped(false), mData(NULL), mSize(0) {
|
|
}
|
|
|
|
Parcel::Blob::~Blob() {
|
|
release();
|
|
}
|
|
|
|
void Parcel::Blob::release() {
|
|
if (mMapped && mData) {
|
|
::munmap(mData, mSize);
|
|
}
|
|
clear();
|
|
}
|
|
|
|
void Parcel::Blob::init(bool mapped, void* data, size_t size) {
|
|
mMapped = mapped;
|
|
mData = data;
|
|
mSize = size;
|
|
}
|
|
|
|
void Parcel::Blob::clear() {
|
|
mMapped = false;
|
|
mData = NULL;
|
|
mSize = 0;
|
|
}
|
|
|
|
}; // namespace android
|