# Sanitizer Patching API

Functions, types, and enums that implement the Sanitizer Patching API.

Enumerations

SanitizerPatchResult

  Sanitizer patch result codes.

Sanitizer_BarrierFlags

  Flags describing a barrier.

Sanitizer_CacheControlInstructionKind

  Cache control action.

Sanitizer_CallFlags

  Flags describing a function call.

Sanitizer_CudaBarrierInstructionKind

  CUDA Barrier action kind.

Sanitizer_DeviceMemoryFlags

  Flags describing a memory access.

Sanitizer_FunctionLoadedStatus

Sanitizer_InstructionId

  Instrumentation.

Sanitizer_WarpgroupMMAAsyncFlags

  Flags describing a warpgroup aligned MMA async.

Functions

SanitizerResult sanitizerAddPatches(const void *image, CUcontext ctx)

  Load a module containing patches that can be used by the patching API.

SanitizerResult sanitizerAddPatchesFromFile(const char *filename, CUcontext ctx)

  Load a module containing patches that can be used by the patching API.

SanitizerResult sanitizerGetCallbackPcAndSize(CUcontext ctx, const char *deviceCallbackName, uint64_t *pc, uint64_t *size)

  Get PC and size of a device callback.

SanitizerResult sanitizerGetFunctionLoadedStatus(CUfunction func, Sanitizer_FunctionLoadedStatus *loadingStatus)

  Get the loading status of a function.

SanitizerResult sanitizerGetFunctionPcAndSize(CUmodule module, const char *functionName, uint64_t *pc, uint64_t *size)

  Get PC and size of a CUDA function.

SanitizerResult sanitizerPatchInstructions(const Sanitizer_InstructionId instructionId, CUmodule module, const char *deviceCallbackName)

  Set instrumentation points and patches to be applied in a module.

SanitizerResult sanitizerPatchModule(CUmodule module)

  Perform the actual instrumentation of a module.

SanitizerResult sanitizerSetCallbackData(CUfunction kernel, const void *userdata)

  Specifies the user data pointer for callbacks.

SanitizerResult sanitizerSetDeviceGraphData(CUgraphExec graphExec, Sanitizer_StreamHandle stream, const void *userdata)

  Specifies the user data pointer accessible from callbacks in the device-launched graphs launched by the specified host-launched graphExec.

SanitizerResult sanitizerSetLaunchCallbackData(Sanitizer_LaunchHandle launch, CUfunction kernel, Sanitizer_StreamHandle stream, const void *userdata)

  Specifies the user data pointer for callbacks.

SanitizerResult sanitizerUnpatchModule(CUmodule module)

  Remove existing instrumentation of a module.

Typedefs

SanitizerCallbackAsyncReduction

  Function type for an asynchronous reduction operation on shared memory.

SanitizerCallbackAsyncStore

  Function type for an asynchronous store operation on shared memory.

SanitizerCallbackBarrier

  Function type for a barrier callback.

SanitizerCallbackBlockEnter

  Function type for a CUDA block enter callback.

SanitizerCallbackBlockExit

  Function type for a CUDA block exit callback.

SanitizerCallbackBulkCopyGlobalToShared

  Function type for a async bulk copy from global to shared memory.

SanitizerCallbackCacheControl

  Function type for a cache control instruction callback.

SanitizerCallbackCall

  Function type for a function call callback.

SanitizerCallbackClusterBarrierArrive

  Function type for a cluster barrier arrive.

SanitizerCallbackCudaBarrier

  Function type for a CUDA Barrier action callback.

SanitizerCallbackDeviceSideFree

  Function type for a device-side free call.

SanitizerCallbackDeviceSideMalloc

  Function type for a device-side malloc call.

SanitizerCallbackMatrixMemoryAccess

  Function type for a matrix shared memory access callback.

SanitizerCallbackMemcpyAsync

  Function type for a global to shared memory asynchronous copy.

SanitizerCallbackMemcpyAsyncBarrier

  Function type for a cuda barrier used for mbarrier completion.

SanitizerCallbackMemoryAccess

  Function type for a memory access callback.

SanitizerCallbackMemsetShared

  Function type for a memset on shared memory.

SanitizerCallbackPipelineCommit

  Function type for a pipeline commit.

SanitizerCallbackPipelineWait

  Function type for a pipeline wait.

SanitizerCallbackRet

  Function type for a function return callback.

SanitizerCallbackSetSmemSize

  Function type for setting the shared memory size allocated to a block.

SanitizerCallbackShfl

  Function type for a shfl callback.

SanitizerCallbackSyncwarp

  Function type for a syncwarp callback.

SanitizerCallbackTensorCoreBarrier

  Function type for a Blackwell tensor core barrier.

SanitizerCallbackWarpgroupFence

  Function type for a warpgroup MMA fence.

SanitizerCallbackWarpgroupMMAAsync

  Function type for a warpgroup aligned async MMA.

SanitizerCallbackWarpgroupWaitGroup

  Function type for a warpgroup MMA wait group.

Sanitizer_LaunchHandle

## Enumerations

enum SanitizerPatchResult

  Sanitizer patch result codes.

  Error and result codes returned by Sanitizer patches. If a patch returns SANITIZER_PATCH_ERROR, the thread will be exited. On Volta and newer architectures, the full warp which the thread belongs to will be exited.

  Values:

  enumerator SANITIZER_PATCH_SUCCESS

    No error.

  enumerator SANITIZER_PATCH_ERROR

    An error was detected in the patch.

  enumerator SANITIZER_PATCH_FORCE_INT

enum Sanitizer_BarrierFlags

  Flags describing a barrier.

  Flags describing a barrier. These values are to be or-combined in the value of flags for a SanitizerCallbackBarrier callback.

  Values:

  enumerator SANITIZER_BARRIER_FLAG_NONE

    Empty flag.

  enumerator SANITIZER_BARRIER_FLAG_UNALIGNED_ALLOWED

    Specifies that the barrier can be called unaligned.

    This flag is only valid on SM 7.0 and above.

  enumerator SANITIZER_BARRIER_FLAG_FORCE_INT

enum Sanitizer_CacheControlInstructionKind

  Cache control action.

  Values:

  enumerator SANITIZER_CACHE_CONTROL_INVALID

    Invalid action ID.

  enumerator SANITIZER_CACHE_CONTROL_L1_PREFETCH

    Prefetch to L1.

  enumerator SANITIZER_CACHE_CONTROL_L2_PREFETCH

    Prefetch to L2.

  enumerator SANITIZER_CACHE_CONTROL_FORCE_INT

enum Sanitizer_CallFlags

  Flags describing a function call.

  Flags describing a function call. These values are to be or-combined in the value of flags for a SanitizerCallbackCall callback.

  Values:

  enumerator SANITIZER_CALL_FLAG_NONE

    Empty flag.

  enumerator SANITIZER_CALL_FLAG_UNALIGNED_ALLOWED

    Specifies that barriers within this function call can be called unaligned.

    This flag is only valid on SM 7.0 and above.

  enumerator SANITIZER_CALL_FLAG_FORCE_INT

enum Sanitizer_CudaBarrierInstructionKind

  CUDA Barrier action kind.

  Refer to the CUDA Barrier interface section of the CUDA toolkit documentation for a more extensive description of these actions.

  Values:

  enumerator SANITIZER_CUDA_BARRIER_INVALID

    Invalid action ID.

  enumerator SANITIZER_CUDA_BARRIER_INIT

    Barrier initialization.

  enumerator SANITIZER_CUDA_BARRIER_ARRIVE

    Barrier arrive operation.

    On Hopper and newer architectures, barrier data is the count argument to the arrive-on operation.

  enumerator SANITIZER_CUDA_BARRIER_ARRIVE_DROP

    Barrier arrive and drop operation.

    On Hopper and newer architectures, barrier data is the count argument to the arrive-on operation.

  enumerator SANITIZER_CUDA_BARRIER_ARRIVE_NOCOMPLETE

    Barrier arrive operation without phase completion.

    Barrier data is the count argument to the arrive-on operation.

  enumerator SANITIZER_CUDA_BARRIER_ARRIVE_DROP_NOCOMPLETE

    Barrier arrive and drop operation without phase completion.

    Barrier data is the count argument to the arrive-on operation.

  enumerator SANITIZER_CUDA_BARRIER_WAIT

    Barrier wait operation.

  enumerator SANITIZER_CUDA_BARRIER_INVALIDATE

    Barrier invalidation.

  enumerator SANITIZER_CUDA_BARRIER_FORCE_INT

enum Sanitizer_DeviceMemoryFlags

  Flags describing a memory access.

  Flags describing a memory access. These values are to be or-combined in the value of flags for a SanitizerCallbackMemoryAccess callback.

  Values:

  enumerator SANITIZER_MEMORY_DEVICE_FLAG_NONE

    Empty flag.

  enumerator SANITIZER_MEMORY_DEVICE_FLAG_READ

    Specifies that the access is a read.

  enumerator SANITIZER_MEMORY_DEVICE_FLAG_WRITE

    Specifies that the access is a write.

  enumerator SANITIZER_MEMORY_DEVICE_FLAG_ATOMSYS

    Specifies that the access is a system-scoped atomic.

  enumerator SANITIZER_MEMORY_DEVICE_FLAG_PREFETCH

    Specifies that the access is a cache prefetch.

  enumerator SANITIZER_MEMORY_DEVICE_FLAG_FORCE_INT

enum Sanitizer_FunctionLoadedStatus

  Values:

  enumerator SANITIZER_FUNCTION_NOT_LOADED

    The function is not loaded.

  enumerator SANITIZER_FUNCTION_PARTIALLY_LOADED

    The function is being loaded.

  enumerator SANITIZER_FUNCTION_LOADED

    The function is fully loaded.

  enumerator SANITIZER_FUNCTION_LOADED_FORCE_INT

enum Sanitizer_InstructionId

  Instrumentation.

  Instrumentation. Every entry represent an instruction type or a function call where a callback patch can be inserted.

  Values:

  enumerator SANITIZER_INSTRUCTION_INVALID

    Invalid instruction ID.

  enumerator SANITIZER_INSTRUCTION_BLOCK_ENTER

    CUDA block enter.

    This is called prior to any user code. The type of the callback must be SanitizerCallbackBlockEnter.

  enumerator SANITIZER_INSTRUCTION_BLOCK_EXIT

    CUDA block exit.

    This is called after all user code has executed. The type of the callback must be SanitizerCallbackBlockExit.

  enumerator SANITIZER_INSTRUCTION_GLOBAL_MEMORY_ACCESS

    Global Memory Access.

    This can be a store, load or atomic operation. The type of the callback must be SanitizerCallbackMemoryAccess.

  enumerator SANITIZER_INSTRUCTION_SHARED_MEMORY_ACCESS

    Shared Memory Access.

    This can be a store, load or atomic operation. The type of the callback must be SanitizerCallbackMemoryAccess.

  enumerator SANITIZER_INSTRUCTION_LOCAL_MEMORY_ACCESS

    Local Memory Access.

    This can be a store or load operation. The type of the callback must be SanitizerCallbackMemoryAccess.

  enumerator SANITIZER_INSTRUCTION_BARRIER

    Barrier.

    The type of the callback must be SanitizerCallbackBarrier.

  enumerator SANITIZER_INSTRUCTION_SYNCWARP

    Syncwarp.

    The type of the callback must be SanitizerCallbackSyncwarp.

  enumerator SANITIZER_INSTRUCTION_SHFL

    Shfl.

    The type of the callback must be SanitizerCallbackShfl.

  enumerator SANITIZER_INSTRUCTION_CALL

    Function call.

    The type of the callback must be SanitizerCallbackCall.

  enumerator SANITIZER_INSTRUCTION_RET

    Function return.

    The type of the callback must be SanitizerCallbackRet.

  enumerator SANITIZER_INSTRUCTION_DEVICE_SIDE_MALLOC

    Device-side malloc.

    The type of the callback must be SanitizerCallbackDeviceSideMalloc.

  enumerator SANITIZER_INSTRUCTION_DEVICE_SIDE_FREE

    Device-side free.

    The type of the callback must be SanitizerCallbackDeviceSideFree.

  enumerator SANITIZER_INSTRUCTION_CUDA_BARRIER

    CUDA Barrier operation.

    The type of the callback must be SanitizerCallbackCudaBarrier.

  enumerator SANITIZER_INSTRUCTION_MEMCPY_ASYNC

    Global to shared memory asynchronous copy.

    The type of the callback must be SanitizerCallbackMemcpyAsync.

  enumerator SANITIZER_INSTRUCTION_PIPELINE_COMMIT

    Pipeline commit.

    The type of the callback must be SanitizerCallbackPipelineCommit.

  enumerator SANITIZER_INSTRUCTION_PIPELINE_WAIT

    Pipeline wait.

    The type of the callback must be SanitizerCallbackPipelineWait.

  enumerator SANITIZER_INSTRUCTION_REMOTE_SHARED_MEMORY_ACCESS

    Remote Shared Memory Access.

    This can be a store or load operation. The type of the callback must be SanitizerCallbackMemoryAccess.

  enumerator SANITIZER_INSTRUCTION_DEVICE_ALIGNED_MALLOC

    Device-side aligned malloc.

    The type of the callback must be SanitizerCallbackDeviceSideMalloc.

  enumerator SANITIZER_INSTRUCTION_MATRIX_MEMORY_ACCESS

    Matrix shared memory access.

    The type of the callback must be SanitizerCallbackMatrixMemoryAccess.

  enumerator SANITIZER_INSTRUCTION_CACHE_CONTROL

    Cache control instruction.

    The type of the callback must be SanitizerCallbackCacheControl.

  enumerator SANITIZER_INSTRUCTION_CLUSTER_BARRIER_ARRIVE

    Cluster barrier arrive instruction.

    The type of the callback must be SanitizerCallbackClusterBarrierArrive.

  enumerator SANITIZER_INSTRUCTION_CLUSTER_BARRIER_WAIT

    Cluster barrier wait instruction.

    The type of the callback must be SanitizerCallbackClusterBarrierWait.

  enumerator SANITIZER_INSTRUCTION_WARPGROUP_MMA_ASYNC

    Warpgroup aligned async MMA instruction.

    The type of the callback must be SanitizerCallbackWarpgroupMMAAsync.

  enumerator SANITIZER_INSTRUCTION_WARPGROUP_WAIT_GROUP

    Warpgroup wait MMA group instruction.

    The type of the callback must be SanitizerCallbackWarpgroupWaitGroup.

  enumerator SANITIZER_INSTRUCTION_WARPGROUP_FENCE

    Warpgroup fence instruction.

    The type of the callback must be SanitizerCallbackWarpgroupFence.

  enumerator SANITIZER_INSTRUCTION_ASYNC_STORE

    Asynchronous store instruction.

    The type of the callback must be SanitizerCallbackAsyncStore.

  enumerator SANITIZER_INSTRUCTION_ASYNC_REDUCTION

    Asynchronous reduction instruction.

    The type of the callback must be SanitizerCallbackAsyncReduction.

  enumerator SANITIZER_INSTRUCTION_SET_SHARED_MEMORY_SIZE

    Set the shared memory size allocated to a block instruction.

    The type of the callback must be SanitizerCallbackSetSmemSize.

  enumerator SANITIZER_INSTRUCTION_BARRIER_RELEASE

    Barrier after it is released.

    The type of the callback must be SanitizerCallbackBarrier.

  enumerator SANITIZER_INSTRUCTION_BULK_COPY_GLOBAL_TO_SHARED

    Bulk copy instruction from global to shared memory.

    The type of the callback must be SanitizerCallbackBulkCopyGlobalToShared.

  enumerator SANITIZER_INSTRUCTION_TENSOR_CORE_BARRIER

    Tensor Core barrier.

    The type of the callback must be SanitizerCallbackTensorCoreBarrier.

  enumerator SANITIZER_INSTRUCTION_MEMSET_SHARED

    Bulk copy instruction from global to shared memory.

    The type of the callback must be SanitizerCallbackMemsetShared.

  enumerator SANITIZER_INSTRUCTION_SYNCWARP_RELEASE

    Syncwarp after it is released.

    The type of the callback must be SanitizerCallbackSyncwarp.

  enumerator SANITIZER_INSTRUCTION_MEMCPY_ASYNC_BARRIER

    Usage of a Cuda Barrier for memcpy async completion.

    The type of the callback must be SanitizerCallbackMemcpyAsyncBarrier.

  enumerator SANITIZER_INSTRUCTION_FORCE_INT

enum Sanitizer_WarpgroupMMAAsyncFlags

  Flags describing a warpgroup aligned MMA async.

  Flags describing a warpgroup aligned MMA async. These values are to be or-combined in the value of flags for a SanitizerCallbackWarpgroupMMAAsync callback.

  Values:

  enumerator SANITIZER_WARPGROUP_MMA_ASYNC_FLAG_NONE

    Empty flag.

  enumerator SANITIZER_WARPGROUP_MMA_ASYNC_FLAG_COMMIT_GROUP

    Specifies that the MMA async delimits a MMA async group of which it is the last instruction.

    Please refer to the PTX documentation for wgmma_async.commit_group for more details. This property is valid even if the warpMask is zero.

  enumerator SANITIZER_WARPGROUP_MMA_ASYNC_FLAG_FORCE_INT

## Functions

SanitizerResult sanitizerAddPatches(const void *image, CUcontext ctx)

  Load a module containing patches that can be used by the patching API.

  Note

  Thread-safety: an API user must serialize access to sanitizerAddPatchesFromFile, sanitizerAddPatches, sanitizerPatchInstructions, and sanitizerPatchModule. For example if sanitizerAddPatches(image) and sanitizerPatchInstruction(*, *, cbName) are called concurrently and cbName is intended to be found in the loaded image, the results are undefined.

  Note

  The patches loaded are only valid for the specified CUDA context.

  Parameters

    - image – Pointer to module data to load. This API supports the same module formats as the cuModuleLoadData and cuModuleLoadFatBinary functions from the CUDA driver API.

    - ctx – CUDA context in which to load the patches. If ctx is NULL, the current context will be used.

  Return values

    - SANITIZER_SUCCESS – on success

    - SANITIZER_ERROR_NOT_INITIALIZED – if unable to initialize the sanitizer

    - SANITIZER_ERROR_INVALID_PARAMETER – if `image` does not point to a valid CUDA module.

SanitizerResult sanitizerAddPatchesFromFile(const char *filename, CUcontext ctx)

  Load a module containing patches that can be used by the patching API.

  Note

  Thread-safety: an API user must serialize access to sanitizerAddPatchesFromFile, sanitizerAddPatches, sanitizerPatchInstructions, and sanitizerPatchModule. For example if sanitizerAddPatchesFromFile(filename) and sanitizerPatchInstruction(*, *, cbName) are called concurrently and cbName is intended to be found in the loaded module, the results are undefined.

  Note

  The patches loaded are only valid for the specified CUDA context.

  Parameters

    - filename – Path to the module file. This API supports the same module formats as the cuModuleLoad function from the CUDA driver API.

    - ctx – CUDA context in which to load the patches. If ctx is NULL, the current context will be used.

  Return values

    - SANITIZER_SUCCESS – on success

    - SANITIZER_ERROR_NOT_INITIALIZED – if unable to initialize the sanitizer

    - SANITIZER_ERROR_INVALID_PARAMETER – if `filename` is not a path to a valid CUDA module.

SanitizerResult sanitizerGetCallbackPcAndSize(CUcontext ctx, const char *deviceCallbackName, uint64_t *pc, uint64_t *size)

  Get PC and size of a device callback.

  Parameters

    - ctx – [in] CUDA context in which the patches were loaded. If ctx is NULL, the current context will be used.

    - deviceCallbackName – [in] device function callback name

    - pc – [out] Callback PC returned

    - size – [out] Callback size returned

  Return values

    - SANITIZER_SUCCESS – on success

    - SANITIZER_ERROR_INVALID_PARAMETER – if `deviceCallbackName` function cannot be located, if pc is NULL or if size is NULL.

SanitizerResult sanitizerGetFunctionLoadedStatus(CUfunction func, Sanitizer_FunctionLoadedStatus *loadingStatus)

  Get the loading status of a function.

  Requires a driver version >=515.

  Parameters

    - func – [in] CUDA function for which the loading status is queried.

    - loadingStatus – [out] Loading status returned

  Return values

    - SANITIZER_SUCCESS – on success

    - SANITIZER_ERROR_INVALID_PARAMETER – if `func` is NULL or if loadingStatus is NULL.

    - SANITIZER_ERROR_NOT_SUPPORTED – if the loading status cannot be queried with this driver version.

SanitizerResult sanitizerGetFunctionPcAndSize(CUmodule module, const char *functionName, uint64_t *pc, uint64_t *size)

  Get PC and size of a CUDA function.

  Parameters

    - module – [in] CUDA module containing the function

    - deviceCallbackName – [in] CUDA function name

    - pc – [out] Function start program counter (PC) returned

    - size – [out] Function size in bytes returned

  Return values

    - SANITIZER_SUCCESS – on success

    - SANITIZER_ERROR_INVALID_PARAMETER – if `functionName` function cannot be located, if pc is NULL or if size is NULL.

SanitizerResult sanitizerPatchInstructions(const Sanitizer_InstructionId instructionId, CUmodule module, const char *deviceCallbackName)

  Set instrumentation points and patches to be applied in a module.

  Mark that all instrumentation points matching instructionId are to be patched in order to call the device function identified by deviceCallbackName. It is up to the API client to ensure that this device callback exists and match the correct callback format for this instrumentation point.

  Note

  Thread-safety: an API user must serialize access to sanitizerAddPatchesFromFile, sanitizerAddPatches, sanitizerPatchInstructions, and sanitizerPatchModule. For example if sanitizerAddPatches(fileName) and sanitizerPatchInstruction(*, *, cbName) are called concurrently and cbName is intended to be found in the loaded module, the results are undefined.

  Parameters

    - instructionId – Instrumentation point for which to insert patches

    - module – CUDA module to instrument

    - deviceCallbackName – Name of the device function callback that the inserted patch will call at the instrumented points. This function is expected to be found in code previously loaded by sanitizerAddPatchesFromFile or sanitizerAddPatches.

  Return values

    - SANITIZER_SUCCESS – on success

    - SANITIZER_ERROR_NOT_INITIALIZED – if unable to initialize the sanitizer

    - SANITIZER_ERROR_INVALID_PARAMETER – if `module` is not a CUDA module or if `deviceCallbackName` function cannot be located.

SanitizerResult sanitizerPatchModule(CUmodule module)

  Perform the actual instrumentation of a module.

  Perform the instrumentation of a CUDA module based on previous calls to sanitizerPatchInstructions. This function also specifies the device memory buffer to be passed in as userdata to all callback functions.

  Note

  Thread-safety: an API user must serialize access to sanitizerAddPatchesFromFile, sanitizerAddPatches, sanitizerPatchInstructions, and sanitizerPatchModule. For example if sanitizerPatchModule(mod, *) and sanitizerPatchInstruction(*, mod, *) are called concurrently, the results are undefined.

  Parameters

    module – CUDA module to instrument

  Return values

    - SANITIZER_SUCCESS – on success

    - SANITIZER_ERROR_INVALID_PARAMETER – if `module` is not a CUDA module

SanitizerResult sanitizerSetCallbackData(CUfunction kernel, const void *userdata)

  Specifies the user data pointer for callbacks.

  Mark all subsequent launches of `kernel` to use `userdata` pointer as the device memory buffer to pass in to callback functions.

  Parameters

    - kernel – CUDA function to link to user data. Callbacks in subsequent launches on this kernel will use `userdata` as callback data.

    - userdata – Device memory buffer. This data will be passed to callback functions via the `userdata` parameter.

  Return values

    SANITIZER_SUCCESS – on success

SanitizerResult sanitizerSetDeviceGraphData(CUgraphExec graphExec, Sanitizer_StreamHandle stream, const void *userdata)

  Specifies the user data pointer accessible from callbacks in the device-launched graphs launched by the specified host-launched graphExec.

  Mark all subsequent launch of `graphExec` to make available `userdata` in device callbacks from device-launched graphs. `userdata` will not be set in the callback userdata parameter but must be accessed through another mean instead. Please refer to the Sanitizer API reference manual. This function is only available if the driver version is 535 or newer.

  Parameters

    - graphExec – CUDA graphExec that will launch CUDA graphs from the device.

    - stream – CUDA stream associated with the stream launch.

    - userdata – Device memory buffer.

  Return values

    SANITIZER_SUCCESS – on success

SanitizerResult sanitizerSetLaunchCallbackData(Sanitizer_LaunchHandle launch, CUfunction kernel, Sanitizer_StreamHandle stream, const void *userdata)

  Specifies the user data pointer for callbacks.

  Mark `launch` to use `userdata` pointer as the device memory buffer to pass in to callback functions. This function is only available if the driver version is 455 or newer.

  Parameters

    - launch – Kernel launch to link to user data. Callbacks in this kernel launch will use `userdata` as callback data.

    - kernel – CUDA function associated with the kernel launch.

    - stream – CUDA stream associated with the stream launch.

    - userdata – Device memory buffer. This data will be passed to callback functions via the `userdata` parameter.

  Return values

    SANITIZER_SUCCESS – on success

SanitizerResult sanitizerUnpatchModule(CUmodule module)

  Remove existing instrumentation of a module.

  Remove any instrumentation of a CUDA module performed by previous calls to sanitizerPatchModule.

  Note

  Thread-safety: an API user must serialize access to sanitizerPatchModule and sanitizerUnpatchModule on the same module. For example, if sanitizerPatchModule(mod) and sanitizerUnpatchModule(mod) are called concurrently, the results are undefined.

  Parameters

    module – CUDA module on which to remove instrumentation

  Return values

    SANITIZER_SUCCESS – on success

## Typedefs

typedef SanitizerPatchResult (*SanitizerCallbackAsyncReduction)(void *userdata, uint64_t pc, uint32_t address, uint32_t mbarAddress, uint32_t accessSize)

  Function type for an asynchronous reduction operation on shared memory.

  This can be generated by a red.async PTX instruction

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param address

    Destination address in shared memory.

  Param mbarAddress

    Address of the mbarrier object.

  Param accessSize

    Size of the access in bytes. Valid values are 4 and 8.

typedef SanitizerPatchResult (*SanitizerCallbackAsyncStore)(void *userdata, uint64_t pc, uint32_t address, uint32_t mbarAddress, void *pNewValue, uint32_t accessSize)

  Function type for an asynchronous store operation on shared memory.

  This can be generated by a st.async PTX instruction

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param address

    Destination address in shared memory.

  Param mbarAddress

    Address of the mbarrier object.

  Param pNewValue

    Pointer to the new value being written.

  Param accessSize

    Size of the access in bytes. Valid values are 4 and 8.

typedef SanitizerPatchResult (*SanitizerCallbackBarrier)(void *userdata, uint64_t pc, uint32_t barIndex, uint32_t threadCount, uint32_t flags)

  Function type for a barrier callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param barIndex

    Barrier index.

  Param threadCount

    Number of expected threads (must be a multiple of the warp size).

  Param flags

    Contains information about the barrier. See Sanitizer_BarrierFlags to interpret this value. 0 means that all threads are participating in the barrier.

typedef SanitizerPatchResult (*SanitizerCallbackBlockEnter)(void *userdata, uint64_t pc)

  Function type for a CUDA block enter callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the entry point of the block

typedef SanitizerPatchResult (*SanitizerCallbackBlockExit)(void *userdata, uint64_t pc)

  Function type for a CUDA block exit callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

typedef SanitizerPatchResult (*SanitizerCallbackBulkCopyGlobalToShared)(void *userdata, uint64_t pc, uint64_t src, uint32_t dst, uint32_t barrier, uint32_t data, uint32_t isMulticast)

  Function type for a async bulk copy from global to shared memory.

  This can be generated by a cp.async.bulk.shared::cluster.global instruction

  All the active threads in a warp have the same parameter values.

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param dst

    Destination DSMEM address.

  Param barrier

    DSMEM address for the associated mbarrier completion mechanism

  Param src

    Source global memory address

  Param data

    Contains in bits 0:15 the number of 16 bytes blocks requested and in bits 16:31 the multicast mask

  Param isMulticast

    Boolean value indicating if the operation is a multicast

typedef SanitizerPatchResult (*SanitizerCallbackCacheControl)(void *userdata, uint64_t pc, void *address, Sanitizer_CacheControlInstructionKind kind)

  Function type for a cache control instruction callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param address

    Address of the memory being controlled

  Param kind

    Type of cache control. See Sanitizer_CacheControlInstructionKind

typedef SanitizerPatchResult (*SanitizerCallbackCall)(void *userdata, uint64_t pc, uint64_t targetPc, uint32_t flags)

  Function type for a function call callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param targetPc

    PC where the called function is located.

  Param flags

    Contains information about the function call.

typedef SanitizerPatchResult (*SanitizerCallbackClusterBarrierArrive)(void *userdata, uint64_t pc)

  Function type for a cluster barrier arrive.

  Function type for a cluster barrier wait.

  This can be generated by a cg::this_cluster().sync() (C++ API), or a barrier.cluster.arrive (PTX API).

  This can be generated by a cg::this_cluster().sync() (C++ API), or a barrier.cluster.wait (PTX API).

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Retval SANITIZER_PATCH_SUCCESS

    Warp execution continues

  Retval SANITIZER_PATCH_ERROR

    Warp should be exited

typedef SanitizerPatchResult (*SanitizerCallbackCudaBarrier)(void *userdata, uint64_t pc, void *barrier, uint32_t kind, uint32_t data)

  Function type for a CUDA Barrier action callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param barrier

    Barrier address which can be used as a unique identifier

  Param kind

    Barrier action type. See Sanitizer_CudaBarrierInstructionKind

  Param data

    Barrier data. This is specific to each action type, refer to Sanitizer_CudaBarrierInstructionKind

typedef SanitizerPatchResult (*SanitizerCallbackDeviceSideFree)(void *userdata, uint64_t pc, void *ptr)

  Function type for a device-side free call.

  Note

  This is called prior to the actual call.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param ptr

    Pointer passed to device-side free.

typedef SanitizerPatchResult (*SanitizerCallbackDeviceSideMalloc)(void *userdata, uint64_t pc, void *allocatedPtr, uint64_t allocatedSize)

  Function type for a device-side malloc call.

  Note

  This is called after the call has completed.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param allocatedPtr

    Pointer returned by device-side malloc

  Param allocatedSize

    Size requested by the user to device-side malloc.

typedef SanitizerPatchResult (*SanitizerCallbackMatrixMemoryAccess)(void *userdata, uint64_t pc, uint32_t address, uint32_t accessSize, uint32_t flags, uint32_t count, const void *pNewValue)

  Function type for a matrix shared memory access callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param address

    Address of the shared memory being read or written. This is an offset within the shared memory window

  Param accessSize

    Size of the access in bytes. Valid value is 16.

  Param flags

    Contains information about the type of access. See Sanitizer_DeviceMemoryFlags to interpret this value.

  Param count

    Number of matrices accessed.

  Param pNewValue

    Pointer to the new value being written if the access is a write. If the access is a read or an atomic, the pointer will be NULL.

typedef SanitizerPatchResult (*SanitizerCallbackMemcpyAsync)(void *userdata, uint64_t pc, void *src, uint32_t dst, uint32_t accessSize)

  Function type for a global to shared memory asynchronous copy.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param src

    Address of the global memory being read. This can be NULL if src-size is 0.

  Param dst

    Address of the shared memory being written. This is an offset within the shared memory window

  Param accessSize

    Size of the access in bytes. Valid values are 4, 8 and 16.

typedef SanitizerPatchResult (*SanitizerCallbackMemcpyAsyncBarrier)(void *userdata, uint64_t pc, uint32_t barrier)

  Function type for a cuda barrier used for mbarrier completion.

  This can be generated by cp.async.mbarrier.arrive

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param barrier

    Shared memory address of the barrier.

typedef SanitizerPatchResult (*SanitizerCallbackMemoryAccess)(void *userdata, uint64_t pc, void *ptr, uint32_t accessSize, uint32_t flags, const void *pData)

  Function type for a memory access callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param ptr

    Address of the memory being accessed. For local or shared memory access, this is the offset within the local or shared memory window.

  Param accessSize

    Size of the access in bytes. Valid values are 1, 2, 4, 8, and 16.

  Param flags

    Contains information about the type of access. See Sanitizer_DeviceMemoryFlags to interpret this value.

  Param pData

    Pointer which value depends on the type of access:

    - If the access is a write, `pData` points to the new value being written.

    - If the access is a read and `pData` is not `NULL`, then it points to a 32-bit mask of loaded bytes being used (padding bytes will not appear).

    - If the access is an atomic, the pointer will be `NULL`.

typedef SanitizerPatchResult (*SanitizerCallbackMemsetShared)(void *userdata, uint64_t pc, uint32_t dst, uint32_t numBlocks)

  Function type for a memset on shared memory.

  This can be generated by st.bulk

  All the active threads in a warp have the same parameter values.

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param dst

    Destination shared memory address.

  Param numBlocks

    Number of 8 byte blocks to be set to zero.

typedef SanitizerPatchResult (*SanitizerCallbackPipelineCommit)(void *userdata, uint64_t pc)

  Function type for a pipeline commit.

  This can be generated by a pipeline::producer_commit (C++ API), a pipeline_commit (C API) or a cp.async.commit_group (PTX API).

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

typedef SanitizerPatchResult (*SanitizerCallbackPipelineWait)(void *userdata, uint64_t pc, uint32_t groups)

  Function type for a pipeline wait.

  This can be generated by a pipeline::consumer_wait (C++ API), a pipeline_wait_prior (C API), cp.async.wait_group or cp.async.wait_all (PTX API).

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param groups

    Number of groups the pipeline will wait for. 0 is used to wait for all groups.

typedef SanitizerPatchResult (*SanitizerCallbackRet)(void *userdata, uint64_t pc)

  Function type for a function return callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

typedef SanitizerPatchResult (*SanitizerCallbackSetSmemSize)(void *userdata, uint64_t pc, uint32_t size)

  Function type for setting the shared memory size allocated to a block.

  This can be generated by a setsmemsize.sync instruction

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param size

    Requested size in bytes.

typedef SanitizerPatchResult (*SanitizerCallbackShfl)(void *userdata, uint64_t pc)

  Function type for a shfl callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

typedef SanitizerPatchResult (*SanitizerCallbackSyncwarp)(void *userdata, uint64_t pc, uint32_t mask)

  Function type for a syncwarp callback.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param mask

    Thread mask passed to __syncwarp().

typedef SanitizerPatchResult (*SanitizerCallbackTensorCoreBarrier)(void *userdata, uint64_t pc, uint32_t barrier, uint32_t isMulticast, uint32_t multicastMask)

  Function type for a Blackwell tensor core barrier.

  This can be generated by a tcgen05.commit instruction

  All the active threads in a warp have the same parameter values.

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param barrier

    DSMEM address for the associated mbarrier completion mechanism

  Param isMulticast

    Boolean value indicating if the operation is a multicast

  Param multicastMask

    Multicast mask, if isMulticast is true

typedef SanitizerPatchResult (*SanitizerCallbackWarpgroupFence)(void *userdata, uint64_t pc, uint32_t warpMask)

  Function type for a warpgroup MMA fence.

  This can be generated by a wgmma.fence in PTX.

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param warpMask

    Mask of threads that will perform the fence operation. Expected values are either 0x0 or 0xffffffff (full). The value is expected to be the same across the warpgroup. Other values can be reported but signal a programming error in the target application.

typedef SanitizerPatchResult (*SanitizerCallbackWarpgroupMMAAsync)(void *userdata, uint64_t pc, uint32_t addressMatrixA, uint32_t sizeMatrixA, uint32_t addressMatrixB, uint32_t sizeMatrixB, uint32_t flags, uint32_t warpMask)

  Function type for a warpgroup aligned async MMA.

  This can be generated by a wgmma.mma_async in PTX.

  Param userdata

    Pointer to user data. See sanitizerPatchModule

  Param pc

    Program counter of the patched instruction

  Param addressMatrixA

    Address in shared memory of the matrix A being read. This field is only valid if sizeMatrixA is non-zero and warpMask is full.

  Param sizeMatrixA

    Size of the matrix A in shared memory. A value of 0 means that the matrix A is read from registers instead.

  Param addressMatrixB

    Address in shared memory of the matrix B being read. This field is only valid if warpMask is full.

  Param sizeMatrixB

    Size of the matrix B in shared memory. The value will always be non-zero.

  Param flags

    Type is `Sanitizer_WarpgroupMMAAsyncFlags`. Provide information about the access. These flags are to be taken into account even if the warpMask is zero.

  Param warpMask

    Mask of threads that will perform the operation and read the operands. Expected values are either 0x0 or 0xffffffff (full). The value is expected to be the same across the warpgroup. Other values can be reported but signal a programming error in the target application.

typedef SanitizerPatchResult (*SanitizerCallbackWarpgroupWaitGroup)(void *userdata, uint64_t pc, uint32_t numGroups, uint32_t warpMask)

  Function type for a warpgroup MMA wait group.

  This can be generated by a wgmma.wait_group in PTX.

  Param userdata

    Pointer to user data. See sanitizerPatchModule.

  Param pc

    Program counter of the patched instruction.

  Param numGroups

    Maximum number of group that will be left pending after the operation. A value of zero means that all MMA async of the warpgroup are guaranteed to have completed after the operation.

  Param warpMask

    Mask of threads for which the expected values are either 0x0 or 0xffffffff (full). The value is expected to be the same across the warpgroup. Other values can be reported but signal a programming error in the target application. If the value is valid, the value has no influence on the operation.

typedef struct Sanitizer_Launch_st *Sanitizer_LaunchHandle