definitions.md

Definitions

Note

Some features are experimental and are denoted as **[Experimental]** in this document.

CallStack

First Available: 8.0 Preview 7

Name	Type	Description
threadId	int	The native thread id of the managed thread.
threadName	string	Optional name of the managed thread.
frames	CallStackFrame[]	Managed frame for the thread at the time of collection.

CallStackFormat

First Available: 8.0 Preview 7

Enumeration that describes the output format of the collected call stacks.

Name	Description
Json	Stacks are formatted in Json. See CallStackResult.
PlainText	Stacks are formatted in plain text.
Speedscope	Stacks are formatted in speedscope. Note that performance data is not present.

CallStackFrame

First Available: 8.0 Preview 7

Name	Type	Description
methodName	string	Name of the method for this frame. This includes generic parameters.
methodToken	int	TypeDef token for the method.
parameterTypes	string[]	Array of parameter types. Empty array if none. Field does not exist when this information is not available.
typeName	string	Name of the class for this frame. This includes generic parameters.
moduleName	string	Name of the module for this frame.
moduleVersionId	guid	Unique identifier used to distinguish between two versions of the same module. An empty value: 00000000-0000-0000-0000-000000000000.
hidden	bool	(8.1+ and 9.0+) Whether this frame has the StackTraceHiddenAttribute and should be omitted from stack trace text.

CallStackResult

First Available: 8.0 Preview 7

Name	Type	Description
stacks	CallStack[]	List of all managed stacks at the time of collection.

CollectionRuleDescription

First Available: 6.3

Object describing the basic state of a collection rule for the executing instance of dotnet monitor.

Name	Type	Description
State	CollectionRuleState	Indicates what state the collection rule is in for the current process.
StateReason	string	Human-readable explanation for the current state of the collection rule.

CollectionRuleDetailedDescription

First Available: 6.3

Object describing the detailed state of a collection rule for the executing instance of dotnet monitor.

Name	Type	Description
State	CollectionRuleState	Indicates what state the collection rule is in for the current process.
StateReason	string	Human-readable explanation for the current state of the collection rule.
LifetimeOccurrences	int	The number of times the trigger has executed for a process in its lifetime.
SlidingWindowOccurrences	int	The number of times the trigger has executed within the current sliding window.
ActionCountLimit	int	The number of times the action list may be executed before being throttled.
ActionCountSlidingWindowDurationLimit	TimeSpan?	The sliding window of time to consider whether the action list should be throttled based on the number of times the action list was executed. Executions that fall outside the window will not count toward the limit specified in the ActionCount setting. If not specified, all action list executions will be counted for the entire duration of the rule.
SlidingWindowDurationCountdown	TimeSpan?	The amount of time remaining before the collection rule will no longer be throttled.
RuleFinishedCountdown	TimeSpan?	The amount of time remaining before the rule will stop monitoring a process after it has been applied to a process. If not specified, the rule will monitor the process with the trigger indefinitely.

CollectionRuleState

First Available: 6.3

Enumeration that describes the current state of the collection rule.

Name	Description
Running	Indicates that the collection rule is active and waiting for its triggering conditions to be satisfied.
ActionExecuting	Indicates that the collection has had its triggering conditions satisfied and is currently executing its action list.
Throttled	Indicates that the collection rule is temporarily throttled because the ActionCountLimit has been reached within the ActionCountSlidingWindowDuration.
Finished	Indicates that the collection rule has completed and will no longer trigger.

CapturedMethod

First Available: 9.0 Preview 4

Object describing a captured method and its parameters.

Name	Type	Description
activityId	string?	An identifier for the current activity at the time of the capture. For more information see Activity.Id.
activityIdFormat	string	The activity Id format. For more information see Activity.IdFormat.
threadId	int	The managed thread id where the method was called.
timestamp	DateTime	Time when the method call was captured.
moduleName	string	The method module name.
typeName	string	The method type name.
methodName	string	The method name.
parameters	CapturedParameter[]	Array of captured parameters.

CapturedParameter

First Available: 9.0 Preview 4

Object describing a captured parameter.

Name	Type	Description
parameterName	string	The parameter name.
value	string?	The parameter value.
typeName	string	The parameter type name.
moduleName	string	The parameter type module name.
evalFailReason	string	The reason why evaluation failed. If missing the evaluation was successful.

CaptureParametersConfiguration

First Available: 8.0 RC 1

Object describing the list of methods to capture parameters for.

Name	Type	Description
methods	MethodDescription[]	Array of methods to capture parameters for.
useDebuggerDisplayAttribute	bool	Determines if parameters should be formatted using their DebuggerDisplayAttribute if available and supported. Expressions in attributes may consist of properties, fields, methods without parameters, or any combination of these.
captureLimit	int	The number of times to capture parameters before stopping. If the specified duration elapses the operation will stop even if the capture limit is not yet reached. Note that parameters may continue to be captured for a short amount of time after this limit is reached.

DotnetMonitorInfo

Object describing diagnostic/automation information about the executing instance of dotnet monitor.

Name	Type	Description
Version	string	The current version of dotnet monitor.
RuntimeVersion	string	The version of the dotnet runtime.
DiagnosticPortMode	DiagnosticPortConnectionMode	Indicates whether dotnet monitor is in connect mode or listen mode.
DiagnosticPortName	string	The name of the named pipe or unix domain socket to use for connecting to the diagnostic server.

DumpType

Enumeration that describes the type of information to capture in a managed dump.

Name	Description
Mini	A small dump containing module lists, thread lists, exception information, and all stacks.
Full	The largest dump containing all memory including the module images.
Triage	A small dump containing only stacks for each thread.
WithHeap	A large and relatively comprehensive dump containing module lists, thread lists, all stacks, exception information, handle information, and all memory except for mapped images.

EventMetricsConfiguration

Describes custom metrics.

Name	Type	Description
includeDefaultProviders	bool	Determines if the default counter providers should be used (such as System.Runtime).
providers	EventMetricsProvider[]	Array of counter providers for metrics to collect.
meters	EventMetricsMeter[]	(7.1+) Array of meters for metrics to collect.

EventMetricsMeter

Name	Type	Description
meterName	string	The name of the meter. Note this is case-insensitive.
instrumentNames	string[]	Array of instruments for metrics to collect for the specified meter. These are case-sensitive.

EventMetricsProvider

Name	Type	Description
providerName	string	The name of the metric provider. Note this is case-insensitive.
counterNames	string[]	Array of providers for metrics to collect. These are case-sensitive.

EventProvider

Object describing which events to capture from a single event provider with keywords and event levels.

Name	Type	Description
Name	string	The name of the provider from which to capture events. See Well-known Event Providers for commonly used event providers.
Keywords	string	Keyword flags used to enable groups of events. Keyword flags are provider specific. May be specified as a 'stringified' integer or a hexadecimal-encoded integer starting with 0x.
EventLevel	EventLevel	The level of the events to collect.
Arguments	map (of string)	Additional arguments to the event provider. Names and values are event provider specific.

EventProvidersConfiguration

Object describing the list of event providers, keywords, event levels, and additional parameters for capturing a trace.

Name	Type	Description
Providers	EventProvider[]	List of event providers from which to capture events. At least one event provider must be specified.
RequestRundown	bool	The runtime may provide additional type information for certain types of events after the trace session is ended. This additional information is known as rundown events. Without this information, some events may not be parsable into useful information. Default is true.
BufferSizeInMB	int	The size (in megabytes) of the event buffer used in the runtime. If the event buffer is filled, events produced by event providers may be dropped until the buffer is cleared. Increase the buffer size to mitigate this or pair down the list of event providers, keywords, and level to filter out extraneous events. Default is 256. Min is 1. Max is 1024.

Example

{
    "Providers": [{
        "Name": "Microsoft-DotNETCore-SampleProfiler",
        "EventLevel": "Informational"
    },{
        "Name": "Microsoft-Windows-DotNETRuntime",
        "EventLevel": "Informational",
        "Keywords": "0x14C14FCCBD"
    }],
    "BufferSizeInMB": 1024
}

ExceptionFilter

Object describing attributes of an exception to use for filtering. To be filtered, an exception must match all provided fields (e.g. if typeName and exceptionType are provided, the top frame of the exception's call stack must have that class name and the exception must be that type).

Name	Type	Description
methodName	string	The name of the top stack frame's method.
typeName	string	The name of the top stack frame's type.
moduleName	string	The name of the top stack frame's module.
exceptionType	string	The type of the exception (e.g. "System.ObjectDisposedException").

ExceptionsConfiguration

Object describing which exceptions should be included/excluded. To be filtered, an exception must match any of the ExceptionConfiguration in the list (e.g. if include is a list of three ExceptionConfiguration, exceptions only need to match one of the three in order to be included).

Name	Type	Description
include	ExceptionFilter[]	The list of exceptions to include in the filter - anything not listed in the filter will not be included in the results.
exclude	ExceptionFilter[]	The list of exceptions to exclude in the filter - anything not listed in the filter will be included in the results.

ExceptionInstance

Object describing an exception instance.

Name	Type	Description
id	int	Unique identifier of the exception instance.
timestamp	string	The UTC date and time in the ISO 8601 format of when the current exception was observed.
typeName	string	The name of the current exception type, including the namespace and parent type names if it is a nested type.
moduleName	string	The name of the module in which the current exception type exists.
message	string	The message that describes the current exception.
innerExceptions	int[]	The IDs of the ExceptionInstances that are the inner exceptions of the current exception.
stack	CallStack	The call stack of the current exception, if it was thrown.

ExceptionFormat

First Available: 8.0 RC 1

Enumeration that describes the format to use when outputting exceptions.

Name
JsonSequence
NewlineDelimitedJson
PlainText

ExtensionMode

Enumeration that describes additional execution modes supported by the extension; the ability to execute is assumed.

Name
Validate

LogEntry

Object describing a log entry from a target process.

Name	Type	Description
Arguments	map (of object)	The arguments of the format string of the log entry, including an entry for the original format string.
Category	string	The category of the log entry.
EventId	string	The event name of the EventId of the log entry.
Exception	string	If an exception is logged, this property contains the formatted message of the log entry.
LogLevel	string	The LogLevel of the log entry.
Message	string	If an exception is NOT logged, this property contains the formatted message of the log entry.
Scopes	map (of object)	The scope information associated with the log entry.

Example

If an application logged the following message:

ILogger<MyNamespace.MyClass> logger = loggerFactory.CreateLogger<MyNamespace.MyClass>();
logger.LogError(new EventId(7, "FailedAfterRetries"), "Failed to get resource after {attempts} attempts.", 5);

The above message would be reported as:

{
    "LogLevel": "Error",
    "EventId": "FailedAfterRetries",
    "Category": "MyNamespace.MyClass",
    "Message": "Failed to get resource after 5 attempts.",
    "Scopes": {
        "RequestId": "8000000a-0004-fc00-b63f-84710c7967bb",
        "RequestPath": "/",
        "ActionId": "9524e18b-1bac-4d4c-88d7-68a753258b1c",
        "ActionName": "/Index"
    },
    "Arguments": {
        "attempts": "5",
        "{OriginalFormat}": "Failed to get resource after {attempts} attempts."
    }
}

LogFormat

Enumeration that describes the format to use when outputting logs.

Name
JsonSequence
NewlineDelimitedJson
PlainText

LogLevel

Enumeration that defines logging severity levels.

See LogLevel documentation.

LogsConfiguration

Object describing the default log level and filtering specifications for collecting logs.

Name	Type	Description
logLevel	LogLevel	The default log level at which logs are collected. Default is Warning.
filterSpecs	map (of LogLevel or null)	A mapping of logger categories and the levels at which those categories should be collected. If level is set to null, collect category at the default level set in the logLevel property.
useAppFilters	bool	Collect logs for the categories and at the levels as specified by the application-defined configuration. Default is true.

Example

The following configuration will collect logs for the Microsoft.AspNetCore.Hosting category at the Information level or higher.

{
    "filterSpecs": {
        "Microsoft.AspNetCore.Hosting": "Information"
    },
    "useAppFilters": false
}

MethodDescription

Object describing a method.

Name	Type	Description
moduleName	string	The name of the module that the method belongs to.
typeName	string	The name of the type that the method belongs to.
methodName	string	The name of the method, not including parameters.

Metric

Object describing a metric from the application.

Name	Type	Description
name	string	The unique name of this metric.
displayName	string	Friendly name for the metric.
timestamp	DateTime	Time when the metric was collected.
provider	string	The provider name for the metric.
unit	string	The unit for the metric. Can be null.
counterType	string	The type of metric. This is typically Rate or Metric.
value	double	The value of the metric.

OperationError

Name	Type	Description
code	string	Error code representing the failure.
message	string	Detailed error message.

OperationProcessInfo

First Available: 6.3

The process on which the egress operation is performed.

Name	Type	Description
pid	int	The ID of the process.
uid	guid	.NET 5+ A value that uniquely identifies a runtime instance within a process. .NET Core 3.1 An empty value: 00000000-0000-0000-0000-000000000000
name	string	The name of the process.

OperationState

Status of the egress operation.

Name	Description
Running	Operation has been started. This is the initial state.
Cancelled	The operation was cancelled by the user.
Stopping	The operation is in the process of stopping at the request of the user.
Succeeded	Egress operation has been successful. Querying the operation will return the location of the egressed artifact.
Failed	Egress operation failed. Querying the operation will return detailed error information.

OperationStatus

Detailed information about an operation.

Name	Type	Description
resourceLocation	string	Resource location of the egressed artifact. This can be Uri or path depending on the egress provider.
error	OperationError	Detailed error message if the operation is in a Failed state.
operationId	guid	Unique identifier for the operation.
createdDateTime	datetime string	UTC DateTime string of when the operation was created.
status	OperationState	The current status of operation.
egressProviderName	string	(7.1+) The name of the egress provider that the artifact is being sent to. This will be null if the artifact is being sent directly back to the user from an HTTP request.
isStoppable	bool	(7.1+) Whether this operation can be gracefully stopped using Stop Operation. Not all operations support being stopped.
process	OperationProcessInfo	(6.3+) The process on which the operation is performed.
tags	set (of string)	(7.1+) A set of user-readable identifiers for the operation.

Example

{
    "resourceLocation": "https://example.blob.core.windows.net/dotnet-monitor/artifacts%2Fcore_20210721_062115",
    "error": null,
    "operationId": "67f07e40-5cca-4709-9062-26302c484f18",
    "createdDateTime": "2021-07-21T06:21:15.315861Z",
    "status": "Succeeded",
    "egressProviderName": "monitorBlob",
    "isStoppable": false,
    "process": {
        "pid": 21632,
        "uid": "cd4da319-fa9e-4987-ac4e-e57b2aac248b",
        "name": "dotnet"
    },
    "tags": [
        "tag1"
    ]
}

OperationSummary

Summary state of an operation.

Name	Type	Description
operationId	guid	Unique identifier for the operation.
createdDateTime	datetime string	UTC DateTime string of when the operation was created.
status	OperationState	The current status of operation.
egressProviderName	string	(7.1+) The name of the egress provider that the artifact is being sent to. This will be null if the artifact is being sent directly back to the user from an HTTP request.
isStoppable	bool	(7.1+) Whether this operation can be gracefully stopped using Stop Operation. Not all operations support being stopped.
process	OperationProcessInfo	(6.3+) The process on which the operation is performed.
tags	set (of string)	(7.1+) A set of user-readable identifiers for the operation.

Example

{
    "operationId": "67f07e40-5cca-4709-9062-26302c484f18",
    "createdDateTime": "2021-07-21T06:21:15.315861Z",
    "status": "Succeeded",
    "egressProviderName": null,
    "isStoppable": false,
    "process": {
        "pid": 21632,
        "uid": "cd4da319-fa9e-4987-ac4e-e57b2aac248b",
        "name": "dotnet"
    },
    "tags": [
        "tag1",
        "tag2"
    ]
}

ProcessIdentifier

Object with process identifying information. The properties on this object describe identifying aspects for a found process; these values can be used in other API calls to perform operations on specific processes.

Name	Type	Description
name	string	The name of the process.
pid	int	The ID of the process.
uid	guid	.NET 5+ A value that uniquely identifies a runtime instance within a process. .NET Core 3.1 An empty value: 00000000-0000-0000-0000-000000000000

The uid property is useful for uniquely identifying a process when it is running in an environment where the process ID may not be unique (e.g. multiple containers within a Kubernetes pod will have entrypoint processes with process ID 1).

The name property may not be a unique identifier if the application was built as a framework-dependent executable. In this case, the name of the process is likely to be either dotnet.exe (Windows) or dotnet (non-Windows). Framework-dependent executables rely on a shared framework installation, which uses the dotnet.exe or dotnet executable to run the application.

Example

{
    "pid": 21632,
    "uid": "cd4da319-fa9e-4987-ac4e-e57b2aac248b"
}

ProcessInfo

Object with detailed information about a specific process.

Some properties will have non-null values for processes that are running on .NET 5 or newer (denoted with .NET 5+). These properties will be null for runtime versions prior to .NET 5.

Name	Type	Description
pid	int	The ID of the process.
uid	guid	.NET 5+ A value that uniquely identifies a runtime instance within a process. .NET Core 3.1 An empty value: 00000000-0000-0000-0000-000000000000
name	string	The name of the process.
commandLine	string	The command line of the process (includes process path and arguments)
operatingSystem	string	.NET 5+ The operating system on which the process is running (e.g. windows, linux, macos). .NET Core 3.1 A value of null.
processArchitecture	string	.NET 5+ The architecture of the process (e.g. x64, x86). .NET Core 3.1 A value of null.

The uid property is useful for uniquely identifying a process when it is running in an environment where the process ID may not be unique (e.g. multiple containers within a Kubernetes pod will have entrypoint processes with process ID 1).

Example

{
    "pid": 21632,
    "uid": "cd4da319-fa9e-4987-ac4e-e57b2aac248b",
    "name": "dotnet",
    "commandLine": "\"C:\\Program Files\\dotnet\\dotnet.exe\" ConsoleApp1.dll",
    "operatingSystem": "Windows",
    "processArchitecture": "x64"
}

TraceEventFilter

Object describing a filter for trace events.

Name	Type	Description
ProviderName	string	The event provider that will produce the specified event.
EventName	string	The name of the event, which is a concatenation of the task name and opcode name, if any. The task and opcode names are separated by a '/'. If the event has no opcode, then the event name is just the task name.
PayloadFilter	map (of string)	(Optional) A mapping of event payload field names to their expected value. A subset of the payload fields may be specified.

TraceProfile

Enumeration that describes the type of diagnostic trace to capture. Each profile represents a list of event providers, event levels, and keywords.

Name	Description
Cpu	Tracks CPU usage and general .NET runtime information.
Http	Tracks ASP.NET request handling and HttpClient requests.
Logs	Tracks log events emitted at the Debug log level or higher.
Metrics	Tracks event counters from the System.Runtime, Microsoft.AspNetCore.Hosting, and Grpc.AspNetCore.Server event sources.
GcCollect	Tracks only garbage collection events, same as the gc-collect profile for dotnet-trace.

ValidationProblemDetails

Object for specifying errors and validation results based on https://tools.ietf.org/html/rfc7807

Name	Type	Description
detail	string	An explanation specific to this occurrence of the problem.
errors	map (of string[])	(Optional) The validation errors related to the request.
extensions	map (of object)	(Optional) Extension members containing additional information about the problem.
instance	string	(Optional) A URI reference that identifies the specific occurrence of the problem.
status	int	The HTTP status code generated by the origin server for this occurrence of the problem.
title	string	(Optional) A short summary of the problem type.
type	string	(Optional) A URI reference that identifies the problem type.

Example

{
    "title": "One or more validation errors occurred.",
    "status": 400,
    "errors": {
        "Providers": [
            "The Providers field is required."
        ]
    }
}