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replicant-frameworks_native/libs/binder/Parcel.cpp
Christopher Tate 2f340be345 Disregard alleged binder entities beyond parcel bounds 
When appending one parcel's contents to another, ignore binder
objects within the source Parcel that appear to lie beyond the
formal bounds of that Parcel's data buffer.

Bug 17312693

Change-Id: If592a260f3fcd9a56fc160e7feb2c8b44c73f514
(cherry picked from commit 27182be9f2)
2015-06-24 20:46:38 +00:00

1801 lines
49 KiB
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/*
* Copyright (C) 2005 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "Parcel"
//#define LOG_NDEBUG 0
#include <binder/Parcel.h>
#include <binder/IPCThreadState.h>
#include <binder/Binder.h>
#include <binder/BpBinder.h>
#include <binder/ProcessState.h>
#include <binder/TextOutput.h>
#include <errno.h>
#include <utils/Debug.h>
#include <utils/Log.h>
#include <utils/String8.h>
#include <utils/String16.h>
#include <utils/misc.h>
#include <utils/Flattenable.h>
#include <cutils/ashmem.h>
#include <private/binder/binder_module.h>
#include <private/binder/Static.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/mman.h>
#ifndef INT32_MAX
#define INT32_MAX ((int32_t)(2147483647))
#endif
#define LOG_REFS(...)
//#define LOG_REFS(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__)
#define LOG_ALLOC(...)
//#define LOG_ALLOC(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__)
// ---------------------------------------------------------------------------
#define PAD_SIZE(s) (((s)+3)&~3)
// Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER
#define STRICT_MODE_PENALTY_GATHER 0x100
// Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER
#define EX_HAS_REPLY_HEADER -128
// Maximum size of a blob to transfer in-place.
static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024;
// XXX This can be made public if we want to provide
// support for typed data.
struct small_flat_data
{
uint32_t type;
uint32_t data;
};
namespace android {
static pthread_mutex_t gParcelGlobalAllocSizeLock = PTHREAD_MUTEX_INITIALIZER;
static size_t gParcelGlobalAllocSize = 0;
static size_t gParcelGlobalAllocCount = 0;
void acquire_object(const sp<ProcessState>& proc,
const flat_binder_object& obj, const void* who)
{
switch (obj.type) {
case BINDER_TYPE_BINDER:
if (obj.binder) {
LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie);
reinterpret_cast<IBinder*>(obj.cookie)->incStrong(who);
}
return;
case BINDER_TYPE_WEAK_BINDER:
if (obj.binder)
reinterpret_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who);
return;
case BINDER_TYPE_HANDLE: {
const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle);
if (b != NULL) {
LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get());
b->incStrong(who);
}
return;
}
case BINDER_TYPE_WEAK_HANDLE: {
const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle);
if (b != NULL) b.get_refs()->incWeak(who);
return;
}
case BINDER_TYPE_FD: {
// intentionally blank -- nothing to do to acquire this, but we do
// recognize it as a legitimate object type.
return;
}
}
ALOGD("Invalid object type 0x%08x", obj.type);
}
void release_object(const sp<ProcessState>& proc,
const flat_binder_object& obj, const void* who)
{
switch (obj.type) {
case BINDER_TYPE_BINDER:
if (obj.binder) {
LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie);
reinterpret_cast<IBinder*>(obj.cookie)->decStrong(who);
}
return;
case BINDER_TYPE_WEAK_BINDER:
if (obj.binder)
reinterpret_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who);
return;
case BINDER_TYPE_HANDLE: {
const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle);
if (b != NULL) {
LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get());
b->decStrong(who);
}
return;
}
case BINDER_TYPE_WEAK_HANDLE: {
const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle);
if (b != NULL) b.get_refs()->decWeak(who);
return;
}
case BINDER_TYPE_FD: {
if (obj.cookie != 0) close(obj.handle);
return;
}
}
ALOGE("Invalid object type 0x%08x", obj.type);
}
inline static status_t finish_flatten_binder(
const sp<IBinder>& /*binder*/, const flat_binder_object& flat, Parcel* out)
{
return out->writeObject(flat, false);
}
status_t flatten_binder(const sp<ProcessState>& /*proc*/,
const sp<IBinder>& binder, Parcel* out)
{
flat_binder_object obj;
obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
if (binder != NULL) {
IBinder *local = binder->localBinder();
if (!local) {
BpBinder *proxy = binder->remoteBinder();
if (proxy == NULL) {
ALOGE("null proxy");
}
const int32_t handle = proxy ? proxy->handle() : 0;
obj.type = BINDER_TYPE_HANDLE;
obj.binder = 0; /* Don't pass uninitialized stack data to a remote process */
obj.handle = handle;
obj.cookie = 0;
} else {
obj.type = BINDER_TYPE_BINDER;
obj.binder = reinterpret_cast<uintptr_t>(local->getWeakRefs());
obj.cookie = reinterpret_cast<uintptr_t>(local);
}
} else {
obj.type = BINDER_TYPE_BINDER;
obj.binder = 0;
obj.cookie = 0;
}
return finish_flatten_binder(binder, obj, out);
}
status_t flatten_binder(const sp<ProcessState>& /*proc*/,
const wp<IBinder>& binder, Parcel* out)
{
flat_binder_object obj;
obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
if (binder != NULL) {
sp<IBinder> real = binder.promote();
if (real != NULL) {
IBinder *local = real->localBinder();
if (!local) {
BpBinder *proxy = real->remoteBinder();
if (proxy == NULL) {
ALOGE("null proxy");
}
const int32_t handle = proxy ? proxy->handle() : 0;
obj.type = BINDER_TYPE_WEAK_HANDLE;
obj.binder = 0; /* Don't pass uninitialized stack data to a remote process */
obj.handle = handle;
obj.cookie = 0;
} else {
obj.type = BINDER_TYPE_WEAK_BINDER;
obj.binder = reinterpret_cast<uintptr_t>(binder.get_refs());
obj.cookie = reinterpret_cast<uintptr_t>(binder.unsafe_get());
}
return finish_flatten_binder(real, obj, out);
}
// XXX How to deal? In order to flatten the given binder,
// we need to probe it for information, which requires a primary
// reference... but we don't have one.
//
// The OpenBinder implementation uses a dynamic_cast<> here,
// but we can't do that with the different reference counting
// implementation we are using.
ALOGE("Unable to unflatten Binder weak reference!");
obj.type = BINDER_TYPE_BINDER;
obj.binder = 0;
obj.cookie = 0;
return finish_flatten_binder(NULL, obj, out);
} else {
obj.type = BINDER_TYPE_BINDER;
obj.binder = 0;
obj.cookie = 0;
return finish_flatten_binder(NULL, obj, out);
}
}
inline static status_t finish_unflatten_binder(
BpBinder* /*proxy*/, const flat_binder_object& /*flat*/,
const Parcel& /*in*/)
{
return NO_ERROR;
}
status_t unflatten_binder(const sp<ProcessState>& proc,
const Parcel& in, sp<IBinder>* out)
{
const flat_binder_object* flat = in.readObject(false);
if (flat) {
switch (flat->type) {
case BINDER_TYPE_BINDER:
*out = reinterpret_cast<IBinder*>(flat->cookie);
return finish_unflatten_binder(NULL, *flat, in);
case BINDER_TYPE_HANDLE:
*out = proc->getStrongProxyForHandle(flat->handle);
return finish_unflatten_binder(
static_cast<BpBinder*>(out->get()), *flat, in);
}
}
return BAD_TYPE;
}
status_t unflatten_binder(const sp<ProcessState>& proc,
const Parcel& in, wp<IBinder>* out)
{
const flat_binder_object* flat = in.readObject(false);
if (flat) {
switch (flat->type) {
case BINDER_TYPE_BINDER:
*out = reinterpret_cast<IBinder*>(flat->cookie);
return finish_unflatten_binder(NULL, *flat, in);
case BINDER_TYPE_WEAK_BINDER:
if (flat->binder != 0) {
out->set_object_and_refs(
reinterpret_cast<IBinder*>(flat->cookie),
reinterpret_cast<RefBase::weakref_type*>(flat->binder));
} else {
*out = NULL;
}
return finish_unflatten_binder(NULL, *flat, in);
case BINDER_TYPE_HANDLE:
case BINDER_TYPE_WEAK_HANDLE:
*out = proc->getWeakProxyForHandle(flat->handle);
return finish_unflatten_binder(
static_cast<BpBinder*>(out->unsafe_get()), *flat, in);
}
}
return BAD_TYPE;
}
// ---------------------------------------------------------------------------
Parcel::Parcel()
{
LOG_ALLOC("Parcel %p: constructing", this);
initState();
}
Parcel::~Parcel()
{
freeDataNoInit();
LOG_ALLOC("Parcel %p: destroyed", this);
}
size_t Parcel::getGlobalAllocSize() {
pthread_mutex_lock(&gParcelGlobalAllocSizeLock);
size_t size = gParcelGlobalAllocSize;
pthread_mutex_unlock(&gParcelGlobalAllocSizeLock);
return size;
}
size_t Parcel::getGlobalAllocCount() {
pthread_mutex_lock(&gParcelGlobalAllocSizeLock);
size_t count = gParcelGlobalAllocCount;
pthread_mutex_unlock(&gParcelGlobalAllocSizeLock);
return count;
}
const uint8_t* Parcel::data() const
{
return mData;
}
size_t Parcel::dataSize() const
{
return (mDataSize > mDataPos ? mDataSize : mDataPos);
}
size_t Parcel::dataAvail() const
{
// TODO: decide what to do about the possibility that this can
// report an available-data size that exceeds a Java int's max
// positive value, causing havoc. Fortunately this will only
// happen if someone constructs a Parcel containing more than two
// gigabytes of data, which on typical phone hardware is simply
// not possible.
return dataSize() - dataPosition();
}
size_t Parcel::dataPosition() const
{
return mDataPos;
}
size_t Parcel::dataCapacity() const
{
return mDataCapacity;
}
status_t Parcel::setDataSize(size_t size)
{
status_t err;
err = continueWrite(size);
if (err == NO_ERROR) {
mDataSize = size;
ALOGV("setDataSize Setting data size of %p to %zu", this, mDataSize);
}
return err;
}
void Parcel::setDataPosition(size_t pos) const
{
mDataPos = pos;
mNextObjectHint = 0;
}
status_t Parcel::setDataCapacity(size_t size)
{
if (size > mDataCapacity) return continueWrite(size);
return NO_ERROR;
}
status_t Parcel::setData(const uint8_t* buffer, size_t len)
{
status_t err = restartWrite(len);
if (err == NO_ERROR) {
memcpy(const_cast<uint8_t*>(data()), buffer, len);
mDataSize = len;
mFdsKnown = false;
}
return err;
}
status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len)
{
const sp<ProcessState> proc(ProcessState::self());
status_t err;
const uint8_t *data = parcel->mData;
const binder_size_t *objects = parcel->mObjects;
size_t size = parcel->mObjectsSize;
int startPos = mDataPos;
int firstIndex = -1, lastIndex = -2;
if (len == 0) {
return NO_ERROR;
}
// range checks against the source parcel size
if ((offset > parcel->mDataSize)
|| (len > parcel->mDataSize)
|| (offset + len > parcel->mDataSize)) {
return BAD_VALUE;
}
// Count objects in range
for (int i = 0; i < (int) size; i++) {
size_t off = objects[i];
if ((off >= offset) && (off + sizeof(flat_binder_object) <= offset + len)) {
if (firstIndex == -1) {
firstIndex = i;
}
lastIndex = i;
}
}
int numObjects = lastIndex - firstIndex + 1;
if ((mDataSize+len) > mDataCapacity) {
// grow data
err = growData(len);
if (err != NO_ERROR) {
return err;
}
}
// append data
memcpy(mData + mDataPos, data + offset, len);
mDataPos += len;
mDataSize += len;
err = NO_ERROR;
if (numObjects > 0) {
// grow objects
if (mObjectsCapacity < mObjectsSize + numObjects) {
int newSize = ((mObjectsSize + numObjects)*3)/2;
binder_size_t *objects =
(binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t));
if (objects == (binder_size_t*)0) {
return NO_MEMORY;
}
mObjects = objects;
mObjectsCapacity = newSize;
}
// append and acquire objects
int idx = mObjectsSize;
for (int i = firstIndex; i <= lastIndex; i++) {
size_t off = objects[i] - offset + startPos;
mObjects[idx++] = off;
mObjectsSize++;
flat_binder_object* flat
= reinterpret_cast<flat_binder_object*>(mData + off);
acquire_object(proc, *flat, this);
if (flat->type == BINDER_TYPE_FD) {
// If this is a file descriptor, we need to dup it so the
// new Parcel now owns its own fd, and can declare that we
// officially know we have fds.
flat->handle = dup(flat->handle);
flat->cookie = 1;
mHasFds = mFdsKnown = true;
if (!mAllowFds) {
err = FDS_NOT_ALLOWED;
}
}
}
}
return err;
}
bool Parcel::pushAllowFds(bool allowFds)
{
const bool origValue = mAllowFds;
if (!allowFds) {
mAllowFds = false;
}
return origValue;
}
void Parcel::restoreAllowFds(bool lastValue)
{
mAllowFds = lastValue;
}
bool Parcel::hasFileDescriptors() const
{
if (!mFdsKnown) {
scanForFds();
}
return mHasFds;
}
// Write RPC headers. (previously just the interface token)
status_t Parcel::writeInterfaceToken(const String16& interface)
{
writeInt32(IPCThreadState::self()->getStrictModePolicy() |
STRICT_MODE_PENALTY_GATHER);
// currently the interface identification token is just its name as a string
return writeString16(interface);
}
bool Parcel::checkInterface(IBinder* binder) const
{
return enforceInterface(binder->getInterfaceDescriptor());
}
bool Parcel::enforceInterface(const String16& interface,
IPCThreadState* threadState) const
{
int32_t strictPolicy = readInt32();
if (threadState == NULL) {
threadState = IPCThreadState::self();
}
if ((threadState->getLastTransactionBinderFlags() &
IBinder::FLAG_ONEWAY) != 0) {
// For one-way calls, the callee is running entirely
// disconnected from the caller, so disable StrictMode entirely.
// Not only does disk/network usage not impact the caller, but
// there's no way to commuicate back any violations anyway.
threadState->setStrictModePolicy(0);
} else {
threadState->setStrictModePolicy(strictPolicy);
}
const String16 str(readString16());
if (str == interface) {
return true;
} else {
ALOGW("**** enforceInterface() expected '%s' but read '%s'",
String8(interface).string(), String8(str).string());
return false;
}
}
const binder_size_t* Parcel::objects() const
{
return mObjects;
}
size_t Parcel::objectsCount() const
{
return mObjectsSize;
}
status_t Parcel::errorCheck() const
{
return mError;
}
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::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;
}
// WARNING: This method must stay in sync with
// Parcelable.Creator<ParcelFileDescriptor> CREATOR
// in frameworks/base/core/java/android/os/ParcelFileDescriptor.java
status_t Parcel::writeParcelFileDescriptor(int fd, int commChannel) {
status_t status;
if (fd < 0) {
status = writeInt32(0); // ParcelFileDescriptor is null
if (status) return status;
} else {
status = writeInt32(1); // ParcelFileDescriptor is not null
if (status) return status;
status = writeDupFileDescriptor(fd);
if (status) return status;
if (commChannel < 0) {
status = writeInt32(0); // commChannel is null
if (status) return status;
} else {
status = writeInt32(1); // commChannel is not null
if (status) return status;
status = writeDupFileDescriptor(commChannel);
}
}
return status;
}
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);
if (!h) {
return 0;
}
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;
}
// WARNING: This method must stay in sync with writeToParcel()
// in frameworks/base/core/java/android/os/ParcelFileDescriptor.java
int Parcel::readParcelFileDescriptor(int& outCommChannel) const {
int fd;
outCommChannel = -1;
if (readInt32() == 0) {
fd = -1;
} else {
fd = readFileDescriptor();
if (fd >= 0 && readInt32() != 0) {
outCommChannel = readFileDescriptor();
}
}
return fd;
}
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 == MAP_FAILED) 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) {
LOG_ALLOC("Parcel %p: freeing other owner data", this);
//ALOGI("Freeing data ref of %p (pid=%d)", this, getpid());
mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie);
} else {
LOG_ALLOC("Parcel %p: freeing allocated data", this);
releaseObjects();
if (mData) {
LOG_ALLOC("Parcel %p: freeing with %zu capacity", this, mDataCapacity);
pthread_mutex_lock(&gParcelGlobalAllocSizeLock);
gParcelGlobalAllocSize -= mDataCapacity;
gParcelGlobalAllocCount--;
pthread_mutex_unlock(&gParcelGlobalAllocSizeLock);
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) {
LOG_ALLOC("Parcel %p: restart from %zu to %zu capacity", this, mDataCapacity, desired);
pthread_mutex_lock(&gParcelGlobalAllocSizeLock);
gParcelGlobalAllocSize += desired;
gParcelGlobalAllocSize -= mDataCapacity;
pthread_mutex_unlock(&gParcelGlobalAllocSizeLock);
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;
LOG_ALLOC("Parcel %p: taking ownership of %zu capacity", this, desired);
pthread_mutex_lock(&gParcelGlobalAllocSizeLock);
gParcelGlobalAllocSize += desired;
gParcelGlobalAllocCount++;
pthread_mutex_unlock(&gParcelGlobalAllocSizeLock);
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) {
LOG_ALLOC("Parcel %p: continue from %zu to %zu capacity", this, mDataCapacity,
desired);
pthread_mutex_lock(&gParcelGlobalAllocSizeLock);
gParcelGlobalAllocSize += desired;
gParcelGlobalAllocSize -= mDataCapacity;
pthread_mutex_unlock(&gParcelGlobalAllocSizeLock);
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);
}
LOG_ALLOC("Parcel %p: allocating with %zu capacity", this, desired);
pthread_mutex_lock(&gParcelGlobalAllocSizeLock);
gParcelGlobalAllocSize += desired;
gParcelGlobalAllocCount++;
pthread_mutex_unlock(&gParcelGlobalAllocSizeLock);
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()
{
LOG_ALLOC("Parcel %p: initState", this);
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
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