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Track ashmem memory usage in Parcel

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Bug: 25004154
Change-Id: Id9d5656dd0605f1b50525596b75601309f67ebdc
This commit is contained in:
Adrian Roos 2015-10-20 19:11:23 -07:00
parent 7135d2768b
commit e2f499fb73
2 changed files with 32 additions and 12 deletions
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6
include/binder/Parcel.h
View File

@ -342,9 +342,11 @@ public:
private:
size_t mBlobAshmemSize;
size_t mOpenAshmemSize;
public:
size_t getBlobAshmemSize() const;
size_t getOpenAshmemSize() const;
};
// ---------------------------------------------------------------------------
@ -412,9 +414,9 @@ inline TextOutput& operator<<(TextOutput& to, const Parcel& parcel)
// Generic acquire and release of objects.
void acquire_object(const sp<ProcessState>& proc,
const flat_binder_object& obj, const void* who);
const flat_binder_object& obj, const void* who, size_t* outAshmemSize);
void release_object(const sp<ProcessState>& proc,
const flat_binder_object& obj, const void* who);
const flat_binder_object& obj, const void* who, size_t* outAshmemSize);
void flatten_binder(const sp<ProcessState>& proc,
const sp<IBinder>& binder, flat_binder_object* out);

38
libs/binder/Parcel.cpp
View File

@ -96,7 +96,7 @@ enum {
};
void acquire_object(const sp<ProcessState>& proc,
const flat_binder_object& obj, const void* who)
const flat_binder_object& obj, const void* who, size_t* outAshmemSize)
{
switch (obj.type) {
case BINDER_TYPE_BINDER:
@ -123,8 +123,13 @@ void acquire_object(const sp<ProcessState>& proc,
return;
}
case BINDER_TYPE_FD: {
// intentionally blank -- nothing to do to acquire this, but we do
// recognize it as a legitimate object type.
if (obj.cookie != 0) {
// If we own an ashmem fd, keep track of how much memory it refers to.
int size = ashmem_get_size_region(obj.handle);
if (size > 0) {
*outAshmemSize += size;
}
}
return;
}
}
@ -133,7 +138,7 @@ void acquire_object(const sp<ProcessState>& proc,
}
void release_object(const sp<ProcessState>& proc,
const flat_binder_object& obj, const void* who)
const flat_binder_object& obj, const void* who, size_t* outAshmemSize)
{
switch (obj.type) {
case BINDER_TYPE_BINDER:
@ -160,7 +165,14 @@ void release_object(const sp<ProcessState>& proc,
return;
}
case BINDER_TYPE_FD: {
if (obj.cookie != 0) close(obj.handle);
if (obj.cookie != 0) {
int size = ashmem_get_size_region(obj.handle);
if (size > 0) {
*outAshmemSize -= size;
}
close(obj.handle);
}
return;
}
}
@ -504,7 +516,7 @@ status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len)
flat_binder_object* flat
= reinterpret_cast<flat_binder_object*>(mData + off);
acquire_object(proc, *flat, this);
acquire_object(proc, *flat, this, &mOpenAshmemSize);
if (flat->type == BINDER_TYPE_FD) {
// If this is a file descriptor, we need to dup it so the
@ -1026,7 +1038,7 @@ restart_write:
// Need to write meta-data?
if (nullMetaData || val.binder != 0) {
mObjects[mObjectsSize] = mDataPos;
acquire_object(ProcessState::self(), val, this);
acquire_object(ProcessState::self(), val, this, &mOpenAshmemSize);
mObjectsSize++;
}
@ -1609,7 +1621,7 @@ void Parcel::releaseObjects()
i--;
const flat_binder_object* flat
= reinterpret_cast<flat_binder_object*>(data+objects[i]);
release_object(proc, *flat, this);
release_object(proc, *flat, this, &mOpenAshmemSize);
}
}
@ -1623,7 +1635,7 @@ void Parcel::acquireObjects()
i--;
const flat_binder_object* flat
= reinterpret_cast<flat_binder_object*>(data+objects[i]);
acquire_object(proc, *flat, this);
acquire_object(proc, *flat, this, &mOpenAshmemSize);
}
}
@ -1805,7 +1817,7 @@ status_t Parcel::continueWrite(size_t desired)
// will need to rescan because we may have lopped off the only FDs
mFdsKnown = false;
}
release_object(proc, *flat, this);
release_object(proc, *flat, this, &mOpenAshmemSize);
}
binder_size_t* objects =
(binder_size_t*)realloc(mObjects, objectsSize*sizeof(binder_size_t));
@ -1891,6 +1903,7 @@ void Parcel::initState()
mAllowFds = true;
mOwner = NULL;
mBlobAshmemSize = 0;
mOpenAshmemSize = 0;
}
void Parcel::scanForFds() const
@ -1913,6 +1926,11 @@ size_t Parcel::getBlobAshmemSize() const
return mBlobAshmemSize;
}
size_t Parcel::getOpenAshmemSize() const
{
return mOpenAshmemSize;
}
// --- Parcel::Blob ---
Parcel::Blob::Blob() :