Abstract: A system performs efficient startup of executors of a distributed computing engine used for processing queries, for example, database queries. The system starts an executor node and processes a set of queries using the executor node to warm up the executor node. The system performs a checkpoint of the warmed-up executor node to create an image. The image is restored in the target executor nodes. The system may store a checkpoint image for each configuration of an executor node. The configuration is determined based on various factors including the hardware of the executor node, memory allocation of the processes, and so on. The user or restore based on checkpoint images improves efficiency of execution of the startup of executor nodes.

Abstract: A system performs efficient startup of executors of a distributed computing engine used for processing queries, for example, database queries. The system starts an executor node and processes a set of queries using the executor node to warm up the executor node. The system performs a checkpoint of the warmed-up executor node to create an image. The image is restored in the target executor nodes. The system may store a checkpoint image for each configuration of an executor node. The configuration is determined based on various factors including the hardware of the executor node, memory allocation of the processes, and so on. The user or restore based on checkpoint images improves efficiency of execution of the startup of executor nodes.

Abstract: This disclosure describes systems and methods for protecting commercial off-the-shelf software program code from piracy. A software program may include an executable file. The executable file may include code and data. A platform may modify the executable file such that the data may be placed at a location in memory not based on a fixed distance from the code. The platform may modify the executable file to indicate that the code should be loaded in a hardware enclave and at least a portion of the data should be loaded in the memory outside the hardware enclave. The platform may encrypt the code and provide it to a computing device.

Abstract: This disclosure describes systems and methods for protecting commercial off-the-shelf software program code from piracy. A software program may include an executable file having code and data. A platform may modify the executable file such that the data may be placed at a location in memory that is an arbitrary distance from the code. The platform may modify the executable file to include a separation header. The separation header may indicate that the data can be placed at an arbitrary distance in the memory from the code. The separation header may indicate that the code should be loaded into a hardware enclave and that the data should be loaded outside of the hardware enclave. The platform may encrypt the code and provide it to a computing device. The computing device may load the encrypted code into the hardware enclave but load the data into memory outside the hardware enclave.

Abstract: This disclosure describes systems and methods for protecting commercial off-the-shelf software program code from piracy. A software program may include an executable file having code and data. A platform may modify the executable file such that the data may be placed at a location in memory that is an arbitrary distance from the code. The platform may modify the executable file to include a separation header. The separation header may indicate that the data can be placed at an arbitrary distance in the memory from the code. The separation header may indicate that the code should be loaded into a hardware enclave and that the data should be loaded outside of the hardware enclave. The platform may encrypt the code and provide it to a computing device. The computing device may load the encrypted code into the hardware enclave but load the data into memory outside the hardware enclave.

Abstract: This disclosure describes systems and methods for protecting commercial off-the-shelf software program code from piracy. A software program may include multiple image files having code and data. A platform may modify the executable file such that the data may be placed at a location in memory that is an arbitrary distance from the code. The platform may encrypt the code and provide it to a computing device comprising a hardware enclave. The computing device may load the encrypted code into the hardware enclave but load the data into memory outside the hardware enclave. The computing device may request a decryption key from an authentication server using a hash of the hardware enclave signed by a processor. The authentication server may provide the decryption key if it verifies the signature and the hash. The computing device may decrypt the code and mark the hardware enclave as non-readable.

Abstract: This disclosure describes systems and methods for protecting commercial off-the-shelf software program code from piracy. A software program may include multiple image files having code and data. A platform may modify the executable file such that the data may be placed at a location in memory that is an arbitrary distance from the code. The platform may encrypt the code and provide it to a computing device comprising a hardware enclave. The computing device may load the encrypted code into the hardware enclave but load the data into memory outside the hardware enclave. The computing device may request a decryption key from an authentication server using a hash of the hardware enclave signed by a processor. The authentication server may provide the decryption key if it verifies the signature and the hash. The computing device may decrypt the code and mark the hardware enclave as non-readable.

Abstract: Debugging systems are configured to resolve both memory aliasing conditions in which a write instruction is directed to an unknown destination address, and concurrency conditions in which control flow information is collected for multiple, concurrently executing threads. Recorded state values corresponding to an application's prior execution and control flow information are both obtained.