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package service

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Published: May 22, 2020 | License: MIT | Module:


func ListenerPipe

func ListenerPipe() (net.Listener, net.Conn)

ListenerPipe returns a full-duplex in-memory connection, like net.Pipe. Unlike net.Pipe one end of the connection is returned as an object satisfying the net.Listener interface. The first call to the Accept method of this object will return a net.Conn connected to the other net.Conn returned by ListenerPipe. Any subsequent calls to Accept will block until the listener is closed.

type Client

type Client interface {
	// Returns the pid of the process we are debugging.
	ProcessPid() int

	// LastModified returns the time that the process' executable was modified.
	LastModified() time.Time

	// Detach detaches the debugger, optionally killing the process.
	Detach(killProcess bool) error

	// Restarts program.
	Restart() ([]api.DiscardedBreakpoint, error)
	// Restarts program from the specified position.
	RestartFrom(rerecord bool, pos string, resetArgs bool, newArgs []string) ([]api.DiscardedBreakpoint, error)

	// GetState returns the current debugger state.
	GetState() (*api.DebuggerState, error)
	// GetStateNonBlocking returns the current debugger state, returning immediately if the target is already running.
	GetStateNonBlocking() (*api.DebuggerState, error)

	// Continue resumes process execution.
	Continue() <-chan *api.DebuggerState
	// Rewind resumes process execution backwards.
	Rewind() <-chan *api.DebuggerState
	// DirecitonCongruentContinue resumes process execution, if a reverse next, step or stepout operation is in progress it will resume execution backward.
	DirectionCongruentContinue() <-chan *api.DebuggerState
	// Next continues to the next source line, not entering function calls.
	Next() (*api.DebuggerState, error)
	// ReverseNext continues backward to the previous line of source code, not entering function calls.
	ReverseNext() (*api.DebuggerState, error)
	// Step continues to the next source line, entering function calls.
	Step() (*api.DebuggerState, error)
	// ReverseStep continues backward to the previous line of source code, entering function calls.
	ReverseStep() (*api.DebuggerState, error)
	// StepOut continues to the return address of the current function.
	StepOut() (*api.DebuggerState, error)
	// ReverseStepOut continues backward to the calle rof the current function.
	ReverseStepOut() (*api.DebuggerState, error)
	// Call resumes process execution while making a function call.
	Call(goroutineID int, expr string, unsafe bool) (*api.DebuggerState, error)

	// SingleStep will step a single cpu instruction.
	StepInstruction() (*api.DebuggerState, error)
	// ReverseSingleStep will reverse step a single cpu instruction.
	ReverseStepInstruction() (*api.DebuggerState, error)
	// SwitchThread switches the current thread context.
	SwitchThread(threadID int) (*api.DebuggerState, error)
	// SwitchGoroutine switches the current goroutine (and the current thread as well)
	SwitchGoroutine(goroutineID int) (*api.DebuggerState, error)
	// Halt suspends the process.
	Halt() (*api.DebuggerState, error)

	// GetBreakpoint gets a breakpoint by ID.
	GetBreakpoint(id int) (*api.Breakpoint, error)
	// GetBreakpointByName gets a breakpoint by name.
	GetBreakpointByName(name string) (*api.Breakpoint, error)
	// CreateBreakpoint creates a new breakpoint.
	CreateBreakpoint(*api.Breakpoint) (*api.Breakpoint, error)
	// ListBreakpoints gets all breakpoints.
	ListBreakpoints() ([]*api.Breakpoint, error)
	// ClearBreakpoint deletes a breakpoint by ID.
	ClearBreakpoint(id int) (*api.Breakpoint, error)
	// ClearBreakpointByName deletes a breakpoint by name
	ClearBreakpointByName(name string) (*api.Breakpoint, error)
	// Allows user to update an existing breakpoint for example to change the information
	// retrieved when the breakpoint is hit or to change, add or remove the break condition
	AmendBreakpoint(*api.Breakpoint) error
	// Cancels a Next or Step call that was interrupted by a manual stop or by another breakpoint
	CancelNext() error

	// ListThreads lists all threads.
	ListThreads() ([]*api.Thread, error)
	// GetThread gets a thread by its ID.
	GetThread(id int) (*api.Thread, error)

	// ListPackageVariables lists all package variables in the context of the current thread.
	ListPackageVariables(filter string, cfg api.LoadConfig) ([]api.Variable, error)
	// EvalVariable returns a variable in the context of the current thread.
	EvalVariable(scope api.EvalScope, symbol string, cfg api.LoadConfig) (*api.Variable, error)

	// SetVariable sets the value of a variable
	SetVariable(scope api.EvalScope, symbol, value string) error

	// ListSources lists all source files in the process matching filter.
	ListSources(filter string) ([]string, error)
	// ListFunctions lists all functions in the process matching filter.
	ListFunctions(filter string) ([]string, error)
	// ListTypes lists all types in the process matching filter.
	ListTypes(filter string) ([]string, error)
	// ListLocals lists all local variables in scope.
	ListLocalVariables(scope api.EvalScope, cfg api.LoadConfig) ([]api.Variable, error)
	// ListFunctionArgs lists all arguments to the current function.
	ListFunctionArgs(scope api.EvalScope, cfg api.LoadConfig) ([]api.Variable, error)
	// ListThreadRegisters lists registers and their values, for the given thread.
	ListThreadRegisters(threadID int, includeFp bool) (api.Registers, error)
	// ListScopeRegisters lists registers and their values, for the given scope.
	ListScopeRegisters(scope api.EvalScope, includeFp bool) (api.Registers, error)

	// ListGoroutines lists all goroutines.
	ListGoroutines(start, count int) ([]*api.Goroutine, int, error)

	// Returns stacktrace
	Stacktrace(goroutineID int, depth int, opts api.StacktraceOptions, cfg *api.LoadConfig) ([]api.Stackframe, error)

	// Returns ancestor stacktraces
	Ancestors(goroutineID int, numAncestors int, depth int) ([]api.Ancestor, error)

	// Returns whether we attached to a running process or not
	AttachedToExistingProcess() bool

	// Returns concrete location information described by a location expression
	// loc ::= <filename>:<line> | <function>[:<line>] | /<regex>/ | (+|-)<offset> | <line> | *<address>
	// * <filename> can be the full path of a file or just a suffix
	// * <function> ::= <package>.<receiver type>.<name> | <package>.(*<receiver type>).<name> | <receiver type>.<name> | <package>.<name> | (*<receiver type>).<name> | <name>
	// * <function> must be unambiguous
	// * /<regex>/ will return a location for each function matched by regex
	// * +<offset> returns a location for the line that is <offset> lines after the current line
	// * -<offset> returns a location for the line that is <offset> lines before the current line
	// * <line> returns a location for a line in the current file
	// * *<address> returns the location corresponding to the specified address
	// NOTE: this function does not actually set breakpoints.
	// If findInstruction is true FindLocation will only return locations that correspond to instructions.
	FindLocation(scope api.EvalScope, loc string, findInstruction bool) ([]api.Location, error)

	// Disassemble code between startPC and endPC
	DisassembleRange(scope api.EvalScope, startPC, endPC uint64, flavour api.AssemblyFlavour) (api.AsmInstructions, error)
	// Disassemble code of the function containing PC
	DisassemblePC(scope api.EvalScope, pc uint64, flavour api.AssemblyFlavour) (api.AsmInstructions, error)

	// Recorded returns true if the target is a recording.
	Recorded() bool
	// TraceDirectory returns the path to the trace directory for a recording.
	TraceDirectory() (string, error)
	// Checkpoint sets a checkpoint at the current position.
	Checkpoint(where string) (checkpointID int, err error)
	// ListCheckpoints gets all checkpoints.
	ListCheckpoints() ([]api.Checkpoint, error)
	// ClearCheckpoint removes a checkpoint
	ClearCheckpoint(id int) error

	// SetReturnValuesLoadConfig sets the load configuration for return values.

	// IsMulticlien returns true if the headless instance is multiclient.
	IsMulticlient() bool

	// ListDynamicLibraries returns a list of loaded dynamic libraries.
	ListDynamicLibraries() ([]api.Image, error)

	// ExamineMemory returns the raw memory stored at the given address.
	// The amount of data to be read is specified by length which must be less than or equal to 1000.
	// This function will return an error if it reads less than `length` bytes.
	ExamineMemory(address uintptr, length int) ([]byte, error)

	// StopRecording stops a recording if one is in progress.
	StopRecording() error

	// Disconnect closes the connection to the server without sending a Detach request first.
	// If cont is true a continue command will be sent instead.
	Disconnect(cont bool) error

	// CallAPI allows calling an arbitrary rpc method (used by starlark bindings)
	CallAPI(method string, args, reply interface{}) error

Client represents a debugger service client. All client methods are synchronous.

type Config

type Config struct {
	// Debugger configuration object, used to configure the underlying
	// debugger used by the server.
	Debugger debugger.Config

	// Listener is used to serve requests.
	Listener net.Listener

	// ProcessArgs are the arguments to launch a new process.
	ProcessArgs []string

	// AcceptMulti configures the server to accept multiple connection.
	// Note that the server API is not reentrant and clients will have to coordinate.
	AcceptMulti bool

	// APIVersion selects which version of the API to serve (default: 1).
	APIVersion int

	// CheckLocalConnUser is true if the debugger should check that local
	// connections come from the same user that started the headless server
	CheckLocalConnUser bool

	// DisconnectChan will be closed by the server when the client disconnects
	DisconnectChan chan<- struct{}

Config provides the configuration to start a Debugger and expose it with a service.

Only one of ProcessArgs or AttachPid should be specified. If ProcessArgs is provided, a new process will be launched. Otherwise, the debugger will try to attach to an existing process with AttachPid.

type RPCCallback

type RPCCallback interface {
	Return(out interface{}, err error)

RPCCallback is used by RPC methods to return their result asynchronously.

type Server

type Server interface {
	Run() error
	Stop() error

Server represents a server for a remote client to connect to.

Documentation was rendered with GOOS=linux and GOARCH=amd64.

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