Merge "CTS error while media dump()"

#include <android/media/ICas.h>

#include <binder/IPCThreadState.h>

#include <binder/Parcel.h>

#include <binder/PermissionCache.h>

#include <media/IMediaExtractor.h>

#include <media/stagefright/MetaData.h>

status_t dumpExtractors(int fd, const Vector<String16>&) {

    String8 out;

    const IPCThreadState* ipc = IPCThreadState::self();

    const int pid = ipc->getCallingPid();

    const int uid = ipc->getCallingUid();

    if (!PermissionCache::checkPermission(String16("android.permission.DUMP"), pid, uid)) {

        out.appendFormat("Permission Denial: "

                "can't dump MediaExtractor from pid=%d, uid=%d\n", pid, uid);

    } else {

        out.append("Recent extractors, most recent first:\n");

        {

            Mutex::Autolock lock(sExtractorsLock);

                out.append(instance.toString());

            }

        }

    }

    write(fd, out.string(), out.size());

    return OK;

}