Vulkan ® 1.2.148 - A Specification (with all registered extensions)

VK_SUCCESS

VK_ERROR_OUT_OF_HOST_MEMORY
VK_ERROR_OUT_OF_DEVICE_MEMORY

The VkDebugUtilsObjectNameInfoEXT structure is defined as:

// Provided by VK_EXT_debug_utils
typedef struct VkDebugUtilsObjectNameInfoEXT {
    VkStructureType    sType;
    const void*        pNext;
    VkObjectType       objectType;
    uint64_t           objectHandle;
    const char*        pObjectName;
} VkDebugUtilsObjectNameInfoEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
objectType is a VkObjectType specifying the type of the object to be named.
objectHandle is the object to be named.
pObjectName is either NULL or a null-terminated UTF-8 string specifying the name to apply to objectHandle.

Applications may change the name associated with an object simply by calling vkSetDebugUtilsObjectNameEXT again with a new string. If pObjectName is either NULL or an empty string, then any previously set name is removed.

Valid Usage

If objectType is VK_OBJECT_TYPE_UNKNOWN, objectHandle must not be VK_NULL_HANDLE
If objectType is not VK_OBJECT_TYPE_UNKNOWN, objectHandle must be VK_NULL_HANDLE or a valid Vulkan handle of the type associated with objectType as defined in the VkObjectType and Vulkan Handle Relationship table

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_UTILS_OBJECT_NAME_INFO_EXT
pNext must be NULL
objectType must be a valid VkObjectType value
If pObjectName is not NULL, pObjectName must be a null-terminated UTF-8 string

Object Data Association

In addition to setting a name for an object, debugging and validation layers may have uses for additional binary data on a per-object basis that have no other place in the Vulkan API.

For example, a VkShaderModule could have additional debugging data attached to it to aid in offline shader tracing.

Additional data can be attached to an object by calling vkSetDebugUtilsObjectTagEXT as defined below.

// Provided by VK_EXT_debug_utils
VkResult vkSetDebugUtilsObjectTagEXT(
    VkDevice                                    device,
    const VkDebugUtilsObjectTagInfoEXT*         pTagInfo);

device is the device that created the object.
pTagInfo is a pointer to a VkDebugUtilsObjectTagInfoEXT structure specifying parameters of the tag to attach to the object.

Valid Usage (Implicit)

device must be a valid VkDevice handle
pTagInfo must be a valid pointer to a valid VkDebugUtilsObjectTagInfoEXT structure

Host Synchronization

Host access to pTagInfo->objectHandle must be externally synchronized

Return Codes

VK_SUCCESS

VK_ERROR_OUT_OF_HOST_MEMORY
VK_ERROR_OUT_OF_DEVICE_MEMORY

The VkDebugUtilsObjectTagInfoEXT structure is defined as:

// Provided by VK_EXT_debug_utils
typedef struct VkDebugUtilsObjectTagInfoEXT {
    VkStructureType    sType;
    const void*        pNext;
    VkObjectType       objectType;
    uint64_t           objectHandle;
    uint64_t           tagName;
    size_t             tagSize;
    const void*        pTag;
} VkDebugUtilsObjectTagInfoEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
objectType is a VkObjectType specifying the type of the object to be named.
objectHandle is the object to be tagged.
tagName is a numerical identifier of the tag.
tagSize is the number of bytes of data to attach to the object.
pTag is a pointer to an array of tagSize bytes containing the data to be associated with the object.

The tagName parameter gives a name or identifier to the type of data being tagged. This can be used by debugging layers to easily filter for only data that can be used by that implementation.

Valid Usage

objectType must not be VK_OBJECT_TYPE_UNKNOWN
objectHandle must be a valid Vulkan handle of the type associated with objectType as defined in the VkObjectType and Vulkan Handle Relationship table

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_UTILS_OBJECT_TAG_INFO_EXT
pNext must be NULL
objectType must be a valid VkObjectType value
pTag must be a valid pointer to an array of tagSize bytes
tagSize must be greater than 0

42.1.2. Queue Labels

All Vulkan work must be submitted using queues. It is possible for an application to use multiple queues, each containing multiple command buffers, when performing work. It can be useful to identify which queue, or even where in a queue, something has occurred.

To begin identifying a region using a debug label inside a queue, you may use the vkQueueBeginDebugUtilsLabelEXT command.

Then, when the region of interest has passed, you may end the label region using vkQueueEndDebugUtilsLabelEXT.

Additionally, a single debug label may be inserted at any time using vkQueueInsertDebugUtilsLabelEXT.

A queue debug label region is opened by calling:

// Provided by VK_EXT_debug_utils
void vkQueueBeginDebugUtilsLabelEXT(
    VkQueue                                     queue,
    const VkDebugUtilsLabelEXT*                 pLabelInfo);

queue is the queue in which to start a debug label region.
pLabelInfo is a pointer to a VkDebugUtilsLabelEXT structure specifying parameters of the label region to open.

Valid Usage (Implicit)

queue must be a valid VkQueue handle
pLabelInfo must be a valid pointer to a valid VkDebugUtilsLabelEXT structure

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
-	-	Any	-

Any

The VkDebugUtilsLabelEXT structure is defined as:

// Provided by VK_EXT_debug_utils
typedef struct VkDebugUtilsLabelEXT {
    VkStructureType    sType;
    const void*        pNext;
    const char*        pLabelName;
    float              color[4];
} VkDebugUtilsLabelEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
pLabelName is a pointer to a null-terminated UTF-8 string containing the name of the label.
color is an optional RGBA color value that can be associated with the label. A particular implementation may choose to ignore this color value. The values contain RGBA values in order, in the range 0.0 to 1.0. If all elements in color are set to 0.0 then it is ignored.

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_UTILS_LABEL_EXT
pNext must be NULL
pLabelName must be a null-terminated UTF-8 string

A queue debug label region is closed by calling:

// Provided by VK_EXT_debug_utils
void vkQueueEndDebugUtilsLabelEXT(
    VkQueue                                     queue);

queue is the queue in which a debug label region should be closed.

The calls to vkQueueBeginDebugUtilsLabelEXT and vkQueueEndDebugUtilsLabelEXT must be matched and balanced.

Valid Usage

There must be an outstanding vkQueueBeginDebugUtilsLabelEXT command prior to the vkQueueEndDebugUtilsLabelEXT on the queue

Valid Usage (Implicit)

queue must be a valid VkQueue handle

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
-	-	Any	-

Any

A single label can be inserted into a queue by calling:

// Provided by VK_EXT_debug_utils
void vkQueueInsertDebugUtilsLabelEXT(
    VkQueue                                     queue,
    const VkDebugUtilsLabelEXT*                 pLabelInfo);

queue is the queue into which a debug label will be inserted.
pLabelInfo is a pointer to a VkDebugUtilsLabelEXT structure specifying parameters of the label to insert.

Valid Usage (Implicit)

queue must be a valid VkQueue handle
pLabelInfo must be a valid pointer to a valid VkDebugUtilsLabelEXT structure

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
-	-	Any	-

Any

42.1.3. Command Buffer Labels

Typical Vulkan applications will submit many command buffers in each frame, with each command buffer containing a large number of individual commands. Being able to logically annotate regions of command buffers that belong together as well as hierarchically subdivide the frame is important to a developer’s ability to navigate the commands viewed holistically.

To identify the beginning of a debug label region in a command buffer, vkCmdBeginDebugUtilsLabelEXT can be used as defined below.

To indicate the end of a debug label region in a command buffer, vkCmdEndDebugUtilsLabelEXT can be used.

To insert a single command buffer debug label inside of a command buffer, vkCmdInsertDebugUtilsLabelEXT can be used as defined below.

A command buffer debug label region can be opened by calling:

// Provided by VK_EXT_debug_utils
void vkCmdBeginDebugUtilsLabelEXT(
    VkCommandBuffer                             commandBuffer,
    const VkDebugUtilsLabelEXT*                 pLabelInfo);

commandBuffer is the command buffer into which the command is recorded.
pLabelInfo is a pointer to a VkDebugUtilsLabelEXT structure specifying parameters of the label region to open.

Valid Usage (Implicit)

commandBuffer must be a valid VkCommandBuffer handle
pLabelInfo must be a valid pointer to a valid VkDebugUtilsLabelEXT structure
commandBuffer must be in the recording state
The VkCommandPool that commandBuffer was allocated from must support graphics, or compute operations

Host Synchronization

Host access to commandBuffer must be externally synchronized
Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
Primary Secondary	Both	Graphics Compute

Primary
Secondary

Both

Graphics
Compute

A command buffer label region can be closed by calling:

// Provided by VK_EXT_debug_utils
void vkCmdEndDebugUtilsLabelEXT(
    VkCommandBuffer                             commandBuffer);

commandBuffer is the command buffer into which the command is recorded.

An application may open a debug label region in one command buffer and close it in another, or otherwise split debug label regions across multiple command buffers or multiple queue submissions. When viewed from the linear series of submissions to a single queue, the calls to vkCmdBeginDebugUtilsLabelEXT and vkCmdEndDebugUtilsLabelEXT must be matched and balanced.

Valid Usage

There must be an outstanding vkCmdBeginDebugUtilsLabelEXT command prior to the vkCmdEndDebugUtilsLabelEXT on the queue that commandBuffer is submitted to
If commandBuffer is a secondary command buffer, there must be an outstanding vkCmdBeginDebugUtilsLabelEXT command recorded to commandBuffer that has not previously been ended by a call to vkCmdEndDebugUtilsLabelEXT

Valid Usage (Implicit)

commandBuffer must be a valid VkCommandBuffer handle
commandBuffer must be in the recording state
The VkCommandPool that commandBuffer was allocated from must support graphics, or compute operations

Host Synchronization

Host access to commandBuffer must be externally synchronized
Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
Primary Secondary	Both	Graphics Compute

Primary
Secondary

Both

Graphics
Compute

A single debug label can be inserted into a command buffer by calling:

// Provided by VK_EXT_debug_utils
void vkCmdInsertDebugUtilsLabelEXT(
    VkCommandBuffer                             commandBuffer,
    const VkDebugUtilsLabelEXT*                 pLabelInfo);

commandBuffer is the command buffer into which the command is recorded.
pInfo is a pointer to a VkDebugUtilsLabelEXT structure specifying parameters of the label to insert.

Valid Usage (Implicit)

commandBuffer must be a valid VkCommandBuffer handle
pLabelInfo must be a valid pointer to a valid VkDebugUtilsLabelEXT structure
commandBuffer must be in the recording state
The VkCommandPool that commandBuffer was allocated from must support graphics, or compute operations

Host Synchronization

Host access to commandBuffer must be externally synchronized
Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
Primary Secondary	Both	Graphics Compute

Primary
Secondary

Both

Graphics
Compute

42.1.4. Debug Messengers

Vulkan allows an application to register multiple callbacks with any Vulkan component wishing to report debug information. Some callbacks may log the information to a file, others may cause a debug break point or other application defined behavior. A primary producer of callback messages are the validation layers. An application can register callbacks even when no validation layers are enabled, but they will only be called for the Vulkan loader and, if implemented, other layer and driver events.

A VkDebugUtilsMessengerEXT is a messenger object which handles passing along debug messages to a provided debug callback.

// Provided by VK_EXT_debug_utils
VK_DEFINE_NON_DISPATCHABLE_HANDLE(VkDebugUtilsMessengerEXT)

The debug messenger will provide detailed feedback on the application’s use of Vulkan when events of interest occur. When an event of interest does occur, the debug messenger will submit a debug message to the debug callback that was provided during its creation. Additionally, the debug messenger is responsible with filtering out debug messages that the callback is not interested in and will only provide desired debug messages.

A debug messenger triggers a debug callback with a debug message when an event of interest occurs. To create a debug messenger which will trigger a debug callback, call:

// Provided by VK_EXT_debug_utils
VkResult vkCreateDebugUtilsMessengerEXT(
    VkInstance                                  instance,
    const VkDebugUtilsMessengerCreateInfoEXT*   pCreateInfo,
    const VkAllocationCallbacks*                pAllocator,
    VkDebugUtilsMessengerEXT*                   pMessenger);

instance is the instance the messenger will be used with.
pCreateInfo is a pointer to a VkDebugUtilsMessengerCreateInfoEXT structure containing the callback pointer, as well as defining conditions under which this messenger will trigger the callback.
pAllocator controls host memory allocation as described in the Memory Allocation chapter.
pMessenger is a pointer to a VkDebugUtilsMessengerEXT handle in which the created object is returned.

Valid Usage (Implicit)

instance must be a valid VkInstance handle
pCreateInfo must be a valid pointer to a valid VkDebugUtilsMessengerCreateInfoEXT structure
If pAllocator is not NULL, pAllocator must be a valid pointer to a valid VkAllocationCallbacks structure
pMessenger must be a valid pointer to a VkDebugUtilsMessengerEXT handle

Return Codes

VK_SUCCESS

VK_ERROR_OUT_OF_HOST_MEMORY

The application must ensure that vkCreateDebugUtilsMessengerEXT is not executed in parallel with any Vulkan command that is also called with instance or child of instance as the dispatchable argument.

The definition of VkDebugUtilsMessengerCreateInfoEXT is:

// Provided by VK_EXT_debug_utils
typedef struct VkDebugUtilsMessengerCreateInfoEXT {
    VkStructureType                         sType;
    const void*                             pNext;
    VkDebugUtilsMessengerCreateFlagsEXT     flags;
    VkDebugUtilsMessageSeverityFlagsEXT     messageSeverity;
    VkDebugUtilsMessageTypeFlagsEXT         messageType;
    PFN_vkDebugUtilsMessengerCallbackEXT    pfnUserCallback;
    void*                                   pUserData;
} VkDebugUtilsMessengerCreateInfoEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
flags is 0 and is reserved for future use.
messageSeverity is a bitmask of VkDebugUtilsMessageSeverityFlagBitsEXT specifying which severity of event(s) will cause this callback to be called.
messageType is a bitmask of VkDebugUtilsMessageTypeFlagBitsEXT specifying which type of event(s) will cause this callback to be called.
pfnUserCallback is the application callback function to call.
pUserData is user data to be passed to the callback.

For each VkDebugUtilsMessengerEXT that is created the VkDebugUtilsMessengerCreateInfoEXT::messageSeverity and VkDebugUtilsMessengerCreateInfoEXT::messageType determine when that VkDebugUtilsMessengerCreateInfoEXT::pfnUserCallback is called. The process to determine if the user’s pfnUserCallback is triggered when an event occurs is as follows:

The implementation will perform a bitwise AND of the event’s VkDebugUtilsMessageSeverityFlagBitsEXT with the messageSeverity provided during creation of the VkDebugUtilsMessengerEXT object.
1. If the value is 0, the message is skipped.
The implementation will perform bitwise AND of the event’s VkDebugUtilsMessageTypeFlagBitsEXT with the messageType provided during the creation of the VkDebugUtilsMessengerEXT object.
1. If the value is 0, the message is skipped.
The callback will trigger a debug message for the current event

The callback will come directly from the component that detected the event, unless some other layer intercepts the calls for its own purposes (filter them in a different way, log to a system error log, etc.).

An application can receive multiple callbacks if multiple VkDebugUtilsMessengerEXT objects are created. A callback will always be executed in the same thread as the originating Vulkan call.

A callback can be called from multiple threads simultaneously (if the application is making Vulkan calls from multiple threads).

Valid Usage

pfnUserCallback must be a valid PFN_vkDebugUtilsMessengerCallbackEXT

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT
flags must be 0
messageSeverity must be a valid combination of VkDebugUtilsMessageSeverityFlagBitsEXT values
messageSeverity must not be 0
messageType must be a valid combination of VkDebugUtilsMessageTypeFlagBitsEXT values
messageType must not be 0
pfnUserCallback must be a valid PFN_vkDebugUtilsMessengerCallbackEXT value

// Provided by VK_EXT_debug_utils
typedef VkFlags VkDebugUtilsMessengerCreateFlagsEXT;

VkDebugUtilsMessengerCreateFlagsEXT is a bitmask type for setting a mask, but is currently reserved for future use.

Bits which can be set in VkDebugUtilsMessengerCreateInfoEXT::messageSeverity, specifying event severities which cause a debug messenger to call the callback, are:

// Provided by VK_EXT_debug_utils
typedef enum VkDebugUtilsMessageSeverityFlagBitsEXT {
    VK_DEBUG_UTILS_MESSAGE_SEVERITY_VERBOSE_BIT_EXT = 0x00000001,
    VK_DEBUG_UTILS_MESSAGE_SEVERITY_INFO_BIT_EXT = 0x00000010,
    VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT = 0x00000100,
    VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT = 0x00001000,
} VkDebugUtilsMessageSeverityFlagBitsEXT;

VK_DEBUG_UTILS_MESSAGE_SEVERITY_VERBOSE_BIT_EXT specifies the most verbose output indicating all diagnostic messages from the Vulkan loader, layers, and drivers should be captured.
VK_DEBUG_UTILS_MESSAGE_SEVERITY_INFO_BIT_EXT specifies an informational message such as resource details that may be handy when debugging an application.
VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT specifies use of Vulkan that may expose an app bug. Such cases may not be immediately harmful, such as a fragment shader outputting to a location with no attachment. Other cases may point to behavior that is almost certainly bad when unintended such as using an image whose memory has not been filled. In general if you see a warning but you know that the behavior is intended/desired, then simply ignore the warning.
VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT specifies that the application has violated a valid usage condition of the specification.

Note

The values of VkDebugUtilsMessageSeverityFlagBitsEXT are sorted based on severity. The higher the flag value, the more severe the message. This allows for simple boolean operation comparisons when looking at VkDebugUtilsMessageSeverityFlagBitsEXT values.

For example:

    if (messageSeverity >= VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT) {
        // Do something for warnings and errors
    }

In addition, space has been left between the enums to allow for later addition of new severities in between the existing values.

// Provided by VK_EXT_debug_utils
typedef VkFlags VkDebugUtilsMessageSeverityFlagsEXT;

VkDebugUtilsMessageSeverityFlagsEXT is a bitmask type for setting a mask of zero or more VkDebugUtilsMessageSeverityFlagBitsEXT.

Bits which can be set in VkDebugUtilsMessengerCreateInfoEXT::messageType, specifying event types which cause a debug messenger to call the callback, are:

// Provided by VK_EXT_debug_utils
typedef enum VkDebugUtilsMessageTypeFlagBitsEXT {
    VK_DEBUG_UTILS_MESSAGE_TYPE_GENERAL_BIT_EXT = 0x00000001,
    VK_DEBUG_UTILS_MESSAGE_TYPE_VALIDATION_BIT_EXT = 0x00000002,
    VK_DEBUG_UTILS_MESSAGE_TYPE_PERFORMANCE_BIT_EXT = 0x00000004,
} VkDebugUtilsMessageTypeFlagBitsEXT;

VK_DEBUG_UTILS_MESSAGE_TYPE_GENERAL_BIT_EXT specifies that some general event has occurred. This is typically a non-specification, non-performance event.
VK_DEBUG_UTILS_MESSAGE_TYPE_VALIDATION_BIT_EXT specifies that something has occurred during validation against the Vulkan specification that may indicate invalid behavior.
VK_DEBUG_UTILS_MESSAGE_TYPE_PERFORMANCE_BIT_EXT specifies a potentially non-optimal use of Vulkan, e.g. using vkCmdClearColorImage when setting VkAttachmentDescription::loadOp to VK_ATTACHMENT_LOAD_OP_CLEAR would have worked.

// Provided by VK_EXT_debug_utils
typedef VkFlags VkDebugUtilsMessageTypeFlagsEXT;

VkDebugUtilsMessageTypeFlagsEXT is a bitmask type for setting a mask of zero or more VkDebugUtilsMessageTypeFlagBitsEXT.

The prototype for the VkDebugUtilsMessengerCreateInfoEXT::pfnUserCallback function implemented by the application is:

// Provided by VK_EXT_debug_utils
typedef VkBool32 (VKAPI_PTR *PFN_vkDebugUtilsMessengerCallbackEXT)(
    VkDebugUtilsMessageSeverityFlagBitsEXT           messageSeverity,
    VkDebugUtilsMessageTypeFlagsEXT                  messageTypes,
    const VkDebugUtilsMessengerCallbackDataEXT*      pCallbackData,
    void*                                            pUserData);

messageSeverity specifies the VkDebugUtilsMessageSeverityFlagBitsEXT that triggered this callback.
messageTypes is a bitmask of VkDebugUtilsMessageTypeFlagBitsEXT specifying which type of event(s) triggered this callback.
pCallbackData contains all the callback related data in the VkDebugUtilsMessengerCallbackDataEXT structure.
pUserData is the user data provided when the VkDebugUtilsMessengerEXT was created.

The callback must not call vkDestroyDebugUtilsMessengerEXT.

The callback returns a VkBool32, which is interpreted in a layer-specified manner. The application should always return VK_FALSE. The VK_TRUE value is reserved for use in layer development.

The definition of VkDebugUtilsMessengerCallbackDataEXT is:

// Provided by VK_EXT_debug_utils
typedef struct VkDebugUtilsMessengerCallbackDataEXT {
    VkStructureType                              sType;
    const void*                                  pNext;
    VkDebugUtilsMessengerCallbackDataFlagsEXT    flags;
    const char*                                  pMessageIdName;
    int32_t                                      messageIdNumber;
    const char*                                  pMessage;
    uint32_t                                     queueLabelCount;
    const VkDebugUtilsLabelEXT*                  pQueueLabels;
    uint32_t                                     cmdBufLabelCount;
    const VkDebugUtilsLabelEXT*                  pCmdBufLabels;
    uint32_t                                     objectCount;
    const VkDebugUtilsObjectNameInfoEXT*         pObjects;
} VkDebugUtilsMessengerCallbackDataEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
flags is 0 and is reserved for future use.
pMessageIdName is a null-terminated string that identifies the particular message ID that is associated with the provided message. If the message corresponds to a validation layer message, then this string may contain the portion of the Vulkan specification that is believed to have been violated.
messageIdNumber is the ID number of the triggering message. If the message corresponds to a validation layer message, then this number is related to the internal number associated with the message being triggered.
pMessage is a null-terminated string detailing the trigger conditions.
queueLabelCount is a count of items contained in the pQueueLabels array.
pQueueLabels is NULL or a pointer to an array of VkDebugUtilsLabelEXT active in the current VkQueue at the time the callback was triggered. Refer to Queue Labels for more information.
cmdBufLabelCount is a count of items contained in the pCmdBufLabels array.
pCmdBufLabels is NULL or a pointer to an array of VkDebugUtilsLabelEXT active in the current VkCommandBuffer at the time the callback was triggered. Refer to Command Buffer Labels for more information.
objectCount is a count of items contained in the pObjects array.
pObjects is a pointer to an array of VkDebugUtilsObjectNameInfoEXT objects related to the detected issue. The array is roughly in order or importance, but the 0th element is always guaranteed to be the most important object for this message.

Note

This structure should only be considered valid during the lifetime of the triggered callback.

Since adding queue and command buffer labels behaves like pushing and popping onto a stack, the order of both pQueueLabels and pCmdBufLabels is based on the order the labels were defined. The result is that the first label in either pQueueLabels or pCmdBufLabels will be the first defined (and therefore the oldest) while the last label in each list will be the most recent.

Note

pQueueLabels will only be non-NULL if one of the objects in pObjects can be related directly to a defined VkQueue which has had one or more labels associated with it.

Likewise, pCmdBufLabels will only be non-NULL if one of the objects in pObjects can be related directly to a defined VkCommandBuffer which has had one or more labels associated with it. Additionally, while command buffer labels allow for beginning and ending across different command buffers, the debug messaging framework cannot guarantee that labels in pCmdBufLables will contain those defined outside of the associated command buffer. This is partially due to the fact that the association of one command buffer with another may not have been defined at the time the debug message is triggered.

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CALLBACK_DATA_EXT
pNext must be NULL
flags must be 0
If pMessageIdName is not NULL, pMessageIdName must be a null-terminated UTF-8 string
pMessage must be a null-terminated UTF-8 string
If queueLabelCount is not 0, pQueueLabels must be a valid pointer to an array of queueLabelCount valid VkDebugUtilsLabelEXT structures
If cmdBufLabelCount is not 0, pCmdBufLabels must be a valid pointer to an array of cmdBufLabelCount valid VkDebugUtilsLabelEXT structures
If objectCount is not 0, pObjects must be a valid pointer to an array of objectCount valid VkDebugUtilsObjectNameInfoEXT structures

// Provided by VK_EXT_debug_utils
typedef VkFlags VkDebugUtilsMessengerCallbackDataFlagsEXT;

VkDebugUtilsMessengerCallbackDataFlagsEXT is a bitmask type for setting a mask, but is currently reserved for future use.

There may be times that a user wishes to intentionally submit a debug message. To do this, call:

// Provided by VK_EXT_debug_utils
void vkSubmitDebugUtilsMessageEXT(
    VkInstance                                  instance,
    VkDebugUtilsMessageSeverityFlagBitsEXT      messageSeverity,
    VkDebugUtilsMessageTypeFlagsEXT             messageTypes,
    const VkDebugUtilsMessengerCallbackDataEXT* pCallbackData);

instance is the debug stream’s VkInstance.
messageSeverity is the VkDebugUtilsMessageSeverityFlagBitsEXT severity of this event/message.
messageTypes is a bitmask of VkDebugUtilsMessageTypeFlagBitsEXT specifying which type of event(s) to identify with this message.
pCallbackData contains all the callback related data in the VkDebugUtilsMessengerCallbackDataEXT structure.

The call will propagate through the layers and generate callback(s) as indicated by the message’s flags. The parameters are passed on to the callback in addition to the pUserData value that was defined at the time the messenger was registered.

Valid Usage

The objectType member of each element of pCallbackData->pObjects must not be VK_OBJECT_TYPE_UNKNOWN

Valid Usage (Implicit)

instance must be a valid VkInstance handle
messageSeverity must be a valid VkDebugUtilsMessageSeverityFlagBitsEXT value
messageTypes must be a valid combination of VkDebugUtilsMessageTypeFlagBitsEXT values
messageTypes must not be 0
pCallbackData must be a valid pointer to a valid VkDebugUtilsMessengerCallbackDataEXT structure

To destroy a VkDebugUtilsMessengerEXT object, call:

// Provided by VK_EXT_debug_utils
void vkDestroyDebugUtilsMessengerEXT(
    VkInstance                                  instance,
    VkDebugUtilsMessengerEXT                    messenger,
    const VkAllocationCallbacks*                pAllocator);

instance is the instance where the callback was created.
messenger is the VkDebugUtilsMessengerEXT object to destroy. messenger is an externally synchronized object and must not be used on more than one thread at a time. This means that vkDestroyDebugUtilsMessengerEXT must not be called when a callback is active.
pAllocator controls host memory allocation as described in the Memory Allocation chapter.

Valid Usage

If VkAllocationCallbacks were provided when messenger was created, a compatible set of callbacks must be provided here
If no VkAllocationCallbacks were provided when messenger was created, pAllocator must be NULL

Valid Usage (Implicit)

instance must be a valid VkInstance handle
If messenger is not VK_NULL_HANDLE, messenger must be a valid VkDebugUtilsMessengerEXT handle
If pAllocator is not NULL, pAllocator must be a valid pointer to a valid VkAllocationCallbacks structure
If messenger is a valid handle, it must have been created, allocated, or retrieved from instance

Host Synchronization

Host access to messenger must be externally synchronized

The application must ensure that vkDestroyDebugUtilsMessengerEXT is not executed in parallel with any Vulkan command that is also called with instance or child of instance as the dispatchable argument.

42.2. Debug Markers

Debug markers provide a flexible way for debugging and validation layers to receive annotation and debug information.

The Object Annotation section describes how to associate a name or binary data with a Vulkan object.

The Command Buffer Markers section describes how to associate logical elements of the scene with commands in the command buffer.

42.2.1. Object Annotation

The commands in this section allow application developers to associate user-defined information with Vulkan objects at will.

An object can be given a user-friendly name by calling:

// Provided by VK_EXT_debug_marker
VkResult vkDebugMarkerSetObjectNameEXT(
    VkDevice                                    device,
    const VkDebugMarkerObjectNameInfoEXT*       pNameInfo);

device is the device that created the object.
pNameInfo is a pointer to a VkDebugMarkerObjectNameInfoEXT structure specifying the parameters of the name to set on the object.

Valid Usage (Implicit)

device must be a valid VkDevice handle
pNameInfo must be a valid pointer to a valid VkDebugMarkerObjectNameInfoEXT structure

Host Synchronization

Host access to pNameInfo->object must be externally synchronized

Return Codes

VK_SUCCESS

VK_ERROR_OUT_OF_HOST_MEMORY
VK_ERROR_OUT_OF_DEVICE_MEMORY

The VkDebugMarkerObjectNameInfoEXT structure is defined as:

// Provided by VK_EXT_debug_marker
typedef struct VkDebugMarkerObjectNameInfoEXT {
    VkStructureType               sType;
    const void*                   pNext;
    VkDebugReportObjectTypeEXT    objectType;
    uint64_t                      object;
    const char*                   pObjectName;
} VkDebugMarkerObjectNameInfoEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
objectType is a VkDebugReportObjectTypeEXT specifying the type of the object to be named.
object is the object to be named.
pObjectName is a null-terminated UTF-8 string specifying the name to apply to object.

Applications may change the name associated with an object simply by calling vkDebugMarkerSetObjectNameEXT again with a new string. To remove a previously set name, pObjectName should be set to an empty string.

Valid Usage

objectType must not be VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT
object must not be VK_NULL_HANDLE
object must be a Vulkan object of the type associated with objectType as defined in VkDebugReportObjectTypeEXT and Vulkan Handle Relationship

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_MARKER_OBJECT_NAME_INFO_EXT
pNext must be NULL
objectType must be a valid VkDebugReportObjectTypeEXT value
pObjectName must be a null-terminated UTF-8 string

In addition to setting a name for an object, debugging and validation layers may have uses for additional binary data on a per-object basis that has no other place in the Vulkan API. For example, a VkShaderModule could have additional debugging data attached to it to aid in offline shader tracing. To attach data to an object, call:

// Provided by VK_EXT_debug_marker
VkResult vkDebugMarkerSetObjectTagEXT(
    VkDevice                                    device,
    const VkDebugMarkerObjectTagInfoEXT*        pTagInfo);

device is the device that created the object.
pTagInfo is a pointer to a VkDebugMarkerObjectTagInfoEXT structure specifying the parameters of the tag to attach to the object.

Valid Usage (Implicit)

device must be a valid VkDevice handle
pTagInfo must be a valid pointer to a valid VkDebugMarkerObjectTagInfoEXT structure

Host Synchronization

Host access to pTagInfo->object must be externally synchronized

Return Codes

VK_SUCCESS

VK_ERROR_OUT_OF_HOST_MEMORY
VK_ERROR_OUT_OF_DEVICE_MEMORY

The VkDebugMarkerObjectTagInfoEXT structure is defined as:

// Provided by VK_EXT_debug_marker
typedef struct VkDebugMarkerObjectTagInfoEXT {
    VkStructureType               sType;
    const void*                   pNext;
    VkDebugReportObjectTypeEXT    objectType;
    uint64_t                      object;
    uint64_t                      tagName;
    size_t                        tagSize;
    const void*                   pTag;
} VkDebugMarkerObjectTagInfoEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
objectType is a VkDebugReportObjectTypeEXT specifying the type of the object to be named.
object is the object to be tagged.
tagName is a numerical identifier of the tag.
tagSize is the number of bytes of data to attach to the object.
pTag is a pointer to an array of tagSize bytes containing the data to be associated with the object.

The tagName parameter gives a name or identifier to the type of data being tagged. This can be used by debugging layers to easily filter for only data that can be used by that implementation.

Valid Usage

objectType must not be VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT
object must not be VK_NULL_HANDLE
object must be a Vulkan object of the type associated with objectType as defined in VkDebugReportObjectTypeEXT and Vulkan Handle Relationship

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_MARKER_OBJECT_TAG_INFO_EXT
pNext must be NULL
objectType must be a valid VkDebugReportObjectTypeEXT value
pTag must be a valid pointer to an array of tagSize bytes
tagSize must be greater than 0

42.2.2. Command Buffer Markers

The marker commands vkCmdDebugMarkerBeginEXT and vkCmdDebugMarkerEndEXT define regions of a series of commands that are grouped together, and they can be nested to create a hierarchy. The vkCmdDebugMarkerInsertEXT command allows insertion of a single label within a command buffer.

A marker region can be opened by calling:

// Provided by VK_EXT_debug_marker
void vkCmdDebugMarkerBeginEXT(
    VkCommandBuffer                             commandBuffer,
    const VkDebugMarkerMarkerInfoEXT*           pMarkerInfo);

commandBuffer is the command buffer into which the command is recorded.
pMarkerInfo is a pointer to a VkDebugMarkerMarkerInfoEXT structure specifying the parameters of the marker region to open.

Valid Usage (Implicit)

commandBuffer must be a valid VkCommandBuffer handle
pMarkerInfo must be a valid pointer to a valid VkDebugMarkerMarkerInfoEXT structure
commandBuffer must be in the recording state
The VkCommandPool that commandBuffer was allocated from must support graphics, or compute operations

Host Synchronization

Host access to commandBuffer must be externally synchronized
Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
Primary Secondary	Both	Graphics Compute

Primary
Secondary

Both

Graphics
Compute

The VkDebugMarkerMarkerInfoEXT structure is defined as:

// Provided by VK_EXT_debug_marker
typedef struct VkDebugMarkerMarkerInfoEXT {
    VkStructureType    sType;
    const void*        pNext;
    const char*        pMarkerName;
    float              color[4];
} VkDebugMarkerMarkerInfoEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
pMarkerName is a pointer to a null-terminated UTF-8 string containing the name of the marker.
color is an optional RGBA color value that can be associated with the marker. A particular implementation may choose to ignore this color value. The values contain RGBA values in order, in the range 0.0 to 1.0. If all elements in color are set to 0.0 then it is ignored.

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_MARKER_MARKER_INFO_EXT
pNext must be NULL
pMarkerName must be a null-terminated UTF-8 string

A marker region can be closed by calling:

// Provided by VK_EXT_debug_marker
void vkCmdDebugMarkerEndEXT(
    VkCommandBuffer                             commandBuffer);

commandBuffer is the command buffer into which the command is recorded.

An application may open a marker region in one command buffer and close it in another, or otherwise split marker regions across multiple command buffers or multiple queue submissions. When viewed from the linear series of submissions to a single queue, the calls to vkCmdDebugMarkerBeginEXT and vkCmdDebugMarkerEndEXT must be matched and balanced.

Valid Usage

There must be an outstanding vkCmdDebugMarkerBeginEXT command prior to the vkCmdDebugMarkerEndEXT on the queue that commandBuffer is submitted to
If commandBuffer is a secondary command buffer, there must be an outstanding vkCmdDebugMarkerBeginEXT command recorded to commandBuffer that has not previously been ended by a call to vkCmdDebugMarkerEndEXT

Valid Usage (Implicit)

commandBuffer must be a valid VkCommandBuffer handle
commandBuffer must be in the recording state
The VkCommandPool that commandBuffer was allocated from must support graphics, or compute operations

Host Synchronization

Host access to commandBuffer must be externally synchronized
Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
Primary Secondary	Both	Graphics Compute

Primary
Secondary

Both

Graphics
Compute

A single marker label can be inserted into a command buffer by calling:

// Provided by VK_EXT_debug_marker
void vkCmdDebugMarkerInsertEXT(
    VkCommandBuffer                             commandBuffer,
    const VkDebugMarkerMarkerInfoEXT*           pMarkerInfo);

commandBuffer is the command buffer into which the command is recorded.
pMarkerInfo is a pointer to a VkDebugMarkerMarkerInfoEXT structure specifying the parameters of the marker to insert.

Valid Usage (Implicit)

commandBuffer must be a valid VkCommandBuffer handle
pMarkerInfo must be a valid pointer to a valid VkDebugMarkerMarkerInfoEXT structure
commandBuffer must be in the recording state
The VkCommandPool that commandBuffer was allocated from must support graphics, or compute operations

Host Synchronization

Host access to commandBuffer must be externally synchronized
Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
Primary Secondary	Both	Graphics Compute

Primary
Secondary

Both

Graphics
Compute

42.3. Debug Report Callbacks

Debug report callbacks are represented by VkDebugReportCallbackEXT handles:

// Provided by VK_EXT_debug_report
VK_DEFINE_NON_DISPATCHABLE_HANDLE(VkDebugReportCallbackEXT)

Debug report callbacks give more detailed feedback on the application’s use of Vulkan when events of interest occur.

To register a debug report callback, an application uses vkCreateDebugReportCallbackEXT.

// Provided by VK_EXT_debug_report
VkResult vkCreateDebugReportCallbackEXT(
    VkInstance                                  instance,
    const VkDebugReportCallbackCreateInfoEXT*   pCreateInfo,
    const VkAllocationCallbacks*                pAllocator,
    VkDebugReportCallbackEXT*                   pCallback);

instance is the instance the callback will be logged on.
pCreateInfo is a pointer to a VkDebugReportCallbackCreateInfoEXT structure defining the conditions under which this callback will be called.
pAllocator controls host memory allocation as described in the Memory Allocation chapter.
pCallback is a pointer to a VkDebugReportCallbackEXT handle in which the created object is returned.

Valid Usage (Implicit)

instance must be a valid VkInstance handle
pCreateInfo must be a valid pointer to a valid VkDebugReportCallbackCreateInfoEXT structure
If pAllocator is not NULL, pAllocator must be a valid pointer to a valid VkAllocationCallbacks structure
pCallback must be a valid pointer to a VkDebugReportCallbackEXT handle

Return Codes

VK_SUCCESS

VK_ERROR_OUT_OF_HOST_MEMORY

The definition of VkDebugReportCallbackCreateInfoEXT is:

// Provided by VK_EXT_debug_report
typedef struct VkDebugReportCallbackCreateInfoEXT {
    VkStructureType                 sType;
    const void*                     pNext;
    VkDebugReportFlagsEXT           flags;
    PFN_vkDebugReportCallbackEXT    pfnCallback;
    void*                           pUserData;
} VkDebugReportCallbackCreateInfoEXT;

sType is the type of this structure.
pNext is NULL or a pointer to a structure extending this structure.
flags is a bitmask of VkDebugReportFlagBitsEXT specifying which event(s) will cause this callback to be called.
pfnCallback is the application callback function to call.
pUserData is user data to be passed to the callback.

For each VkDebugReportCallbackEXT that is created the VkDebugReportCallbackCreateInfoEXT::flags determine when that VkDebugReportCallbackCreateInfoEXT::pfnCallback is called. When an event happens, the implementation will do a bitwise AND of the event’s VkDebugReportFlagBitsEXT flags to each VkDebugReportCallbackEXT object’s flags. For each non-zero result the corresponding callback will be called. The callback will come directly from the component that detected the event, unless some other layer intercepts the calls for its own purposes (filter them in a different way, log to a system error log, etc.).

An application may receive multiple callbacks if multiple VkDebugReportCallbackEXT objects were created. A callback will always be executed in the same thread as the originating Vulkan call.

A callback may be called from multiple threads simultaneously (if the application is making Vulkan calls from multiple threads).

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT
flags must be a valid combination of VkDebugReportFlagBitsEXT values
pfnCallback must be a valid PFN_vkDebugReportCallbackEXT value

Bits which can be set in VkDebugReportCallbackCreateInfoEXT::flags, specifying events which cause a debug report, are:

// Provided by VK_EXT_debug_report
typedef enum VkDebugReportFlagBitsEXT {
    VK_DEBUG_REPORT_INFORMATION_BIT_EXT = 0x00000001,
    VK_DEBUG_REPORT_WARNING_BIT_EXT = 0x00000002,
    VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT = 0x00000004,
    VK_DEBUG_REPORT_ERROR_BIT_EXT = 0x00000008,
    VK_DEBUG_REPORT_DEBUG_BIT_EXT = 0x00000010,
} VkDebugReportFlagBitsEXT;

VK_DEBUG_REPORT_ERROR_BIT_EXT specifies that the application has violated a valid usage condition of the specification.
VK_DEBUG_REPORT_WARNING_BIT_EXT specifies use of Vulkan that may expose an app bug. Such cases may not be immediately harmful, such as a fragment shader outputting to a location with no attachment. Other cases may point to behavior that is almost certainly bad when unintended such as using an image whose memory has not been filled. In general if you see a warning but you know that the behavior is intended/desired, then simply ignore the warning.
VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT specifies a potentially non-optimal use of Vulkan, e.g. using vkCmdClearColorImage when setting VkAttachmentDescription::loadOp to VK_ATTACHMENT_LOAD_OP_CLEAR would have worked.
VK_DEBUG_REPORT_INFORMATION_BIT_EXT specifies an informational message such as resource details that may be handy when debugging an application.
VK_DEBUG_REPORT_DEBUG_BIT_EXT specifies diagnostic information from the implementation and layers.

// Provided by VK_EXT_debug_report
typedef VkFlags VkDebugReportFlagsEXT;

VkDebugReportFlagsEXT is a bitmask type for setting a mask of zero or more VkDebugReportFlagBitsEXT.

The prototype for the VkDebugReportCallbackCreateInfoEXT::pfnCallback function implemented by the application is:

// Provided by VK_EXT_debug_report
typedef VkBool32 (VKAPI_PTR *PFN_vkDebugReportCallbackEXT)(
    VkDebugReportFlagsEXT                       flags,
    VkDebugReportObjectTypeEXT                  objectType,
    uint64_t                                    object,
    size_t                                      location,
    int32_t                                     messageCode,
    const char*                                 pLayerPrefix,
    const char*                                 pMessage,
    void*                                       pUserData);

flags specifies the VkDebugReportFlagBitsEXT that triggered this callback.
objectType is a VkDebugReportObjectTypeEXT value specifying the type of object being used or created at the time the event was triggered.
object is the object where the issue was detected. If objectType is VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT, object is undefined.
location is a component (layer, driver, loader) defined value specifying the location of the trigger. This is an optional value.
messageCode is a layer-defined value indicating what test triggered this callback.
pLayerPrefix is a null-terminated string that is an abbreviation of the name of the component making the callback. pLayerPrefix is only valid for the duration of the callback.
pMessage is a null-terminated string detailing the trigger conditions. pMessage is only valid for the duration of the callback.
pUserData is the user data given when the VkDebugReportCallbackEXT was created.

The callback must not call vkDestroyDebugReportCallbackEXT.

The callback returns a VkBool32, which is interpreted in a layer-specified manner. The application should always return VK_FALSE. The VK_TRUE value is reserved for use in layer development.

object must be a Vulkan object or VK_NULL_HANDLE. If objectType is not VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT and object is not VK_NULL_HANDLE, object must be a Vulkan object of the corresponding type associated with objectType as defined in VkDebugReportObjectTypeEXT and Vulkan Handle Relationship.

Possible values passed to the objectType parameter of the callback function specified by VkDebugReportCallbackCreateInfoEXT::pfnCallback, specifying the type of object handle being reported, are:

// Provided by VK_EXT_debug_report, VK_EXT_debug_marker
typedef enum VkDebugReportObjectTypeEXT {
    VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT = 0,
    VK_DEBUG_REPORT_OBJECT_TYPE_INSTANCE_EXT = 1,
    VK_DEBUG_REPORT_OBJECT_TYPE_PHYSICAL_DEVICE_EXT = 2,
    VK_DEBUG_REPORT_OBJECT_TYPE_DEVICE_EXT = 3,
    VK_DEBUG_REPORT_OBJECT_TYPE_QUEUE_EXT = 4,
    VK_DEBUG_REPORT_OBJECT_TYPE_SEMAPHORE_EXT = 5,
    VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT = 6,
    VK_DEBUG_REPORT_OBJECT_TYPE_FENCE_EXT = 7,
    VK_DEBUG_REPORT_OBJECT_TYPE_DEVICE_MEMORY_EXT = 8,
    VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_EXT = 9,
    VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT = 10,
    VK_DEBUG_REPORT_OBJECT_TYPE_EVENT_EXT = 11,
    VK_DEBUG_REPORT_OBJECT_TYPE_QUERY_POOL_EXT = 12,
    VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_VIEW_EXT = 13,
    VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_VIEW_EXT = 14,
    VK_DEBUG_REPORT_OBJECT_TYPE_SHADER_MODULE_EXT = 15,
    VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_CACHE_EXT = 16,
    VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_LAYOUT_EXT = 17,
    VK_DEBUG_REPORT_OBJECT_TYPE_RENDER_PASS_EXT = 18,
    VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_EXT = 19,
    VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_SET_LAYOUT_EXT = 20,
    VK_DEBUG_REPORT_OBJECT_TYPE_SAMPLER_EXT = 21,
    VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_POOL_EXT = 22,
    VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_SET_EXT = 23,
    VK_DEBUG_REPORT_OBJECT_TYPE_FRAMEBUFFER_EXT = 24,
    VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_POOL_EXT = 25,
    VK_DEBUG_REPORT_OBJECT_TYPE_SURFACE_KHR_EXT = 26,
    VK_DEBUG_REPORT_OBJECT_TYPE_SWAPCHAIN_KHR_EXT = 27,
    VK_DEBUG_REPORT_OBJECT_TYPE_DEBUG_REPORT_CALLBACK_EXT_EXT = 28,
    VK_DEBUG_REPORT_OBJECT_TYPE_DISPLAY_KHR_EXT = 29,
    VK_DEBUG_REPORT_OBJECT_TYPE_DISPLAY_MODE_KHR_EXT = 30,
    VK_DEBUG_REPORT_OBJECT_TYPE_VALIDATION_CACHE_EXT_EXT = 33,
  // Provided by VK_KHR_sampler_ycbcr_conversion with VK_EXT_debug_report, VK_EXT_debug_report with VK_VERSION_1_1
    VK_DEBUG_REPORT_OBJECT_TYPE_SAMPLER_YCBCR_CONVERSION_EXT = 1000156000,
  // Provided by VK_EXT_debug_report with VK_VERSION_1_1
    VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE_EXT = 1000085000,
  // Provided by VK_KHR_ray_tracing
    VK_DEBUG_REPORT_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR_EXT = 1000165000,
    VK_DEBUG_REPORT_OBJECT_TYPE_DEBUG_REPORT_EXT = VK_DEBUG_REPORT_OBJECT_TYPE_DEBUG_REPORT_CALLBACK_EXT_EXT,
    VK_DEBUG_REPORT_OBJECT_TYPE_VALIDATION_CACHE_EXT = VK_DEBUG_REPORT_OBJECT_TYPE_VALIDATION_CACHE_EXT_EXT,
  // Provided by VK_KHR_descriptor_update_template with VK_EXT_debug_report
    VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE_KHR_EXT = VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE_EXT,
  // Provided by VK_KHR_sampler_ycbcr_conversion
    VK_DEBUG_REPORT_OBJECT_TYPE_SAMPLER_YCBCR_CONVERSION_KHR_EXT = VK_DEBUG_REPORT_OBJECT_TYPE_SAMPLER_YCBCR_CONVERSION_EXT,
  // Provided by VK_NV_ray_tracing
    VK_DEBUG_REPORT_OBJECT_TYPE_ACCELERATION_STRUCTURE_NV_EXT = VK_DEBUG_REPORT_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR_EXT,
} VkDebugReportObjectTypeEXT;

Table 77. `VkDebugReportObjectTypeEXT` and Vulkan Handle Relationship
VkDebugReportObjectTypeEXT	Vulkan Handle Type
`VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT`	Unknown/Undefined Handle
`VK_DEBUG_REPORT_OBJECT_TYPE_INSTANCE_EXT`	VkInstance
`VK_DEBUG_REPORT_OBJECT_TYPE_PHYSICAL_DEVICE_EXT`	VkPhysicalDevice
`VK_DEBUG_REPORT_OBJECT_TYPE_DEVICE_EXT`	VkDevice
`VK_DEBUG_REPORT_OBJECT_TYPE_QUEUE_EXT`	VkQueue
`VK_DEBUG_REPORT_OBJECT_TYPE_SEMAPHORE_EXT`	VkSemaphore
`VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT`	VkCommandBuffer
`VK_DEBUG_REPORT_OBJECT_TYPE_FENCE_EXT`	VkFence
`VK_DEBUG_REPORT_OBJECT_TYPE_DEVICE_MEMORY_EXT`	VkDeviceMemory
`VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_EXT`	VkBuffer
`VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT`	VkImage
`VK_DEBUG_REPORT_OBJECT_TYPE_EVENT_EXT`	VkEvent
`VK_DEBUG_REPORT_OBJECT_TYPE_QUERY_POOL_EXT`	VkQueryPool
`VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_VIEW_EXT`	VkBufferView
`VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_VIEW_EXT`	VkImageView
`VK_DEBUG_REPORT_OBJECT_TYPE_SHADER_MODULE_EXT`	VkShaderModule
`VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_CACHE_EXT`	VkPipelineCache
`VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_LAYOUT_EXT`	VkPipelineLayout
`VK_DEBUG_REPORT_OBJECT_TYPE_RENDER_PASS_EXT`	VkRenderPass
`VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_EXT`	VkPipeline
`VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_SET_LAYOUT_EXT`	VkDescriptorSetLayout
`VK_DEBUG_REPORT_OBJECT_TYPE_SAMPLER_EXT`	VkSampler
`VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_POOL_EXT`	VkDescriptorPool
`VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_SET_EXT`	VkDescriptorSet
`VK_DEBUG_REPORT_OBJECT_TYPE_FRAMEBUFFER_EXT`	VkFramebuffer
`VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_POOL_EXT`	VkCommandPool
`VK_DEBUG_REPORT_OBJECT_TYPE_SURFACE_KHR_EXT`	VkSurfaceKHR
`VK_DEBUG_REPORT_OBJECT_TYPE_SWAPCHAIN_KHR_EXT`	VkSwapchainKHR
`VK_DEBUG_REPORT_OBJECT_TYPE_DEBUG_REPORT_CALLBACK_EXT_EXT`	VkDebugReportCallbackEXT
`VK_DEBUG_REPORT_OBJECT_TYPE_DISPLAY_KHR_EXT`	VkDisplayKHR
`VK_DEBUG_REPORT_OBJECT_TYPE_DISPLAY_MODE_KHR_EXT`	VkDisplayModeKHR
`VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE_EXT`	VkDescriptorUpdateTemplate

Note

The primary expected use of VK_ERROR_VALIDATION_FAILED_EXT is for validation layer testing. It is not expected that an application would see this error code during normal use of the validation layers.

To inject its own messages into the debug stream, call:

// Provided by VK_EXT_debug_report
void vkDebugReportMessageEXT(
    VkInstance                                  instance,
    VkDebugReportFlagsEXT                       flags,
    VkDebugReportObjectTypeEXT                  objectType,
    uint64_t                                    object,
    size_t                                      location,
    int32_t                                     messageCode,
    const char*                                 pLayerPrefix,
    const char*                                 pMessage);

instance is the debug stream’s VkInstance.
flags specifies the VkDebugReportFlagBitsEXT classification of this event/message.
objectType is a VkDebugReportObjectTypeEXT specifying the type of object being used or created at the time the event was triggered.
object is the object where the issue was detected. object can be VK_NULL_HANDLE if there is no object associated with the event.
location is an application defined value.
messageCode is an application defined value.
pLayerPrefix is the abbreviation of the component making this event/message.
pMessage is a null-terminated string detailing the trigger conditions.

Valid Usage

object must be a Vulkan object or VK_NULL_HANDLE
If objectType is not VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT and object is not VK_NULL_HANDLE, object must be a Vulkan object of the corresponding type associated with objectType as defined in VkDebugReportObjectTypeEXT and Vulkan Handle Relationship

Valid Usage (Implicit)

instance must be a valid VkInstance handle
flags must be a valid combination of VkDebugReportFlagBitsEXT values
flags must not be 0
objectType must be a valid VkDebugReportObjectTypeEXT value
pLayerPrefix must be a null-terminated UTF-8 string
pMessage must be a null-terminated UTF-8 string

To destroy a VkDebugReportCallbackEXT object, call:

// Provided by VK_EXT_debug_report
void vkDestroyDebugReportCallbackEXT(
    VkInstance                                  instance,
    VkDebugReportCallbackEXT                    callback,
    const VkAllocationCallbacks*                pAllocator);

instance is the instance where the callback was created.
callback is the VkDebugReportCallbackEXT object to destroy. callback is an externally synchronized object and must not be used on more than one thread at a time. This means that vkDestroyDebugReportCallbackEXT must not be called when a callback is active.
pAllocator controls host memory allocation as described in the Memory Allocation chapter.

Valid Usage

If VkAllocationCallbacks were provided when callback was created, a compatible set of callbacks must be provided here
If no VkAllocationCallbacks were provided when callback was created, pAllocator must be NULL

Valid Usage (Implicit)

instance must be a valid VkInstance handle
If callback is not VK_NULL_HANDLE, callback must be a valid VkDebugReportCallbackEXT handle
If pAllocator is not NULL, pAllocator must be a valid pointer to a valid VkAllocationCallbacks structure
If callback is a valid handle, it must have been created, allocated, or retrieved from instance

Host Synchronization

Host access to callback must be externally synchronized

42.4. Device Loss Debugging

42.4.1. Device Diagnostic Checkpoints

Device execution progress can be tracked for the purposes of debugging a device loss by annotating the command stream with application-defined diagnostic checkpoints.

Device diagnostic checkpoints are inserted into the command stream by calling vkCmdSetCheckpointNV.

// Provided by VK_NV_device_diagnostic_checkpoints
void vkCmdSetCheckpointNV(
    VkCommandBuffer                             commandBuffer,
    const void*                                 pCheckpointMarker);

commandBuffer is the command buffer that will receive the marker
pCheckpointMarker is an opaque application-provided value that will be associated with the checkpoint.

Valid Usage (Implicit)

commandBuffer must be a valid VkCommandBuffer handle
commandBuffer must be in the recording state
The VkCommandPool that commandBuffer was allocated from must support graphics, compute, or transfer operations

Host Synchronization

Host access to commandBuffer must be externally synchronized
Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

Command Buffer Levels	Render Pass Scope	Supported Queue Types	Pipeline Type
Primary Secondary	Both	Graphics Compute Transfer

Primary
Secondary

Both

Graphics
Compute
Transfer

Note that pCheckpointMarker is treated as an opaque value. It does not need to be a valid pointer and will not be dereferenced by the implementation.

If the device encounters an error during execution, the implementation will return a VK_ERROR_DEVICE_LOST error to the application at a certain point during host execution. When this happens, the application can call vkGetQueueCheckpointDataNV to retrieve information on the most recent diagnostic checkpoints that were executed by the device.

// Provided by VK_NV_device_diagnostic_checkpoints
void vkGetQueueCheckpointDataNV(
    VkQueue                                     queue,
    uint32_t*                                   pCheckpointDataCount,
    VkCheckpointDataNV*                         pCheckpointData);

queue is the VkQueue object the caller would like to retrieve checkpoint data for
pCheckpointDataCount is a pointer to an integer related to the number of checkpoint markers available or queried, as described below.
pCheckpointData is either NULL or a pointer to an array of VkCheckpointDataNV structures.

If pCheckpointData is NULL, then the number of checkpoint markers available is returned in pCheckpointDataCount.

Otherwise, pCheckpointDataCount must point to a variable set by the user to the number of elements in the pCheckpointData array, and on return the variable is overwritten with the number of structures actually written to pCheckpointData.

If pCheckpointDataCount is less than the number of checkpoint markers available, at most pCheckpointDataCount structures will be written.

Valid Usage

The device that queue belongs to must be in the lost state

Valid Usage (Implicit)

queue must be a valid VkQueue handle
pCheckpointDataCount must be a valid pointer to a uint32_t value
If the value referenced by pCheckpointDataCount is not 0, and pCheckpointData is not NULL, pCheckpointData must be a valid pointer to an array of pCheckpointDataCount VkCheckpointDataNV structures

The VkCheckpointDataNV structure is defined as:

// Provided by VK_NV_device_diagnostic_checkpoints
typedef struct VkCheckpointDataNV {
    VkStructureType            sType;
    void*                      pNext;
    VkPipelineStageFlagBits    stage;
    void*                      pCheckpointMarker;
} VkCheckpointDataNV;

sType is the type of this structure
pNext is NULL or a pointer to a structure extending this structure.
stage indicates which pipeline stage the checkpoint marker data refers to.
pCheckpointMarker contains the value of the last checkpoint marker executed in the stage that stage refers to.

The stages at which a checkpoint marker can be executed are implementation-defined and can be queried by calling vkGetPhysicalDeviceQueueFamilyProperties2.

Valid Usage (Implicit)

sType must be VK_STRUCTURE_TYPE_CHECKPOINT_DATA_NV
pNext must be NULL

42.5. Active Tooling Information

Information about tools providing debugging, profiling, or similar services, active for a given physical device, can be obtained by calling:

// Provided by VK_EXT_tooling_info
VkResult vkGetPhysicalDeviceToolPropertiesEXT(
    VkPhysicalDevice                            physicalDevice,
    uint32_t*                                   pToolCount,
    VkPhysicalDeviceToolPropertiesEXT*          pToolProperties);

physicalDevice is the handle to the physical device to query for active tools.
pToolCount is a pointer to an integer describing the number of tools active on physicalDevice.
pToolProperties is either NULL or a pointer to an array of VkPhysicalDeviceToolPropertiesEXT structures.

If pToolProperties is NULL, then the number of tools currently active on physicalDevice is returned in pToolCount. Otherwise, pToolCount must point to a variable set by the user to the number of elements in the pToolProperties array, and on return the variable is overwritten with the number of structures actually written to pToolProperties. If pToolCount is less than the number of currently active tools, at most pToolCount structures will be written.

The count and properties of active tools may change in response to events outside the scope of the specification. An application should assume these properties might change at any given time.

Valid Usage (Implicit)

physicalDevice must be a valid VkPhysicalDevice handle
pToolCount must be a valid pointer to a uint32_t value
If the value referenced by pToolCount is not 0, and pToolProperties is not NULL, pToolProperties must be a valid pointer to an array of pToolCount VkPhysicalDeviceToolPropertiesEXT structures

Return Codes