tracing/runtime: Add support for Go1.22

Generate g for today's state of Go 1.22 (go1.22.0-0-ga10e42f219).
Compared to Go1.21 many new fields and a couple of new types were
introduced as shown by the diff below.

Regenerated files stay without changes for Go1.21 and previous releases.

---- 8< ----
diff --git a/zruntime_g_go1.21.go b/zruntime_g_go1.22.go
index c55d865..910382b 100644
--- a/zruntime_g_go1.21.go
+++ b/zruntime_g_go1.22.go
@@ -1,7 +1,7 @@
 // Code generated by g_typedef; DO NOT EDIT.

-//go:build go1.21 && !go1.22
-// +build go1.21,!go1.22
+//go:build go1.22 && !go1.23
+// +build go1.22,!go1.23

 package xruntime

@@ -13,7 +13,7 @@ type g struct {
 	// stack describes the actual stack memory: [stack.lo, stack.hi).
 	// stackguard0 is the stack pointer compared in the Go stack growth prologue.
 	// It is stack.lo+StackGuard normally, but can be StackPreempt to trigger a preemption.
-	// stackguard1 is the stack pointer compared in the C stack growth prologue.
+	// stackguard1 is the stack pointer compared in the //go:systemstack stack growth prologue.
 	// It is stack.lo+StackGuard on g0 and gsignal stacks.
 	// It is ~0 on other goroutine stacks, to trigger a call to morestackc (and crash).
 	stack       stack   // offset known to runtime/cgo
@@ -30,7 +30,7 @@ type g struct {
 	// param is a generic pointer parameter field used to pass
 	// values in particular contexts where other storage for the
 	// parameter would be difficult to find. It is currently used
-	// in three ways:
+	// in four ways:
 	// 1. When a channel operation wakes up a blocked goroutine, it sets param to
 	//    point to the sudog of the completed blocking operation.
 	// 2. By gcAssistAlloc1 to signal back to its caller that the goroutine completed
@@ -38,6 +38,8 @@ type g struct {
 	//    stack may have moved in the meantime.
 	// 3. By debugCallWrap to pass parameters to a new goroutine because allocating a
 	//    closure in the runtime is forbidden.
+	// 4. When a panic is recovered and control returns to the respective frame,
+	//    param may point to a savedOpenDeferState.
 	param        unsafe.Pointer
 	atomicstatus atomic.Uint32
 	stackLock    uint32 // sigprof/scang lock; TODO: fold in to atomicstatus
@@ -67,8 +69,13 @@ type g struct {
 	// park on a chansend or chanrecv. Used to signal an unsafe point
 	// for stack shrinking.
 	parkingOnChan atomic.Bool
+	// inMarkAssist indicates whether the goroutine is in mark assist.
+	// Used by the execution tracer.
+	inMarkAssist bool
+	coroexit     bool // argument to coroswitch_m

 	raceignore    int8  // ignore race detection events
+	nocgocallback bool  // whether disable callback from C
 	tracking      bool  // whether we're tracking this G for sched latency statistics
 	trackingSeq   uint8 // used to decide whether to track this G
 	trackingStamp int64 // timestamp of when the G last started being tracked
@@ -90,6 +97,8 @@ type g struct {
 	timer         *timer         // cached timer for time.Sleep
 	selectDone    atomic.Uint32  // are we participating in a select and did someone win the race?

+	coroarg *coro // argument during coroutine transfers
+
 	// goroutineProfiled indicates the status of this goroutine's stack for the
 	// current in-progress goroutine profile
 	goroutineProfiled goroutineProfileStateHolder
@@ -114,36 +123,39 @@ type _panic struct {
 	argp unsafe.Pointer // pointer to arguments of deferred call run during panic; cannot move - known to liblink
 	arg  interface{}    // argument to panic
 	link *_panic        // link to earlier panic
-	pc        uintptr        // where to return to in runtime if this panic is bypassed
-	sp        unsafe.Pointer // where to return to in runtime if this panic is bypassed
-	recovered bool           // whether this panic is over
-	aborted   bool           // the panic was aborted
+
+	// startPC and startSP track where _panic.start was called.
+	startPC uintptr
+	startSP unsafe.Pointer
+
+	// The current stack frame that we're running deferred calls for.
+	sp unsafe.Pointer
+	lr uintptr
+	fp unsafe.Pointer
+
+	// retpc stores the PC where the panic should jump back to, if the
+	// function last returned by _panic.next() recovers the panic.
+	retpc uintptr
+
+	// Extra state for handling open-coded defers.
+	deferBitsPtr *uint8
+	slotsPtr     unsafe.Pointer
+
+	recovered   bool // whether this panic has been recovered
 	goexit      bool
+	deferreturn bool
 }
 type _defer struct {
-	started bool
 	heap      bool
-	// openDefer indicates that this _defer is for a frame with open-coded
-	// defers. We have only one defer record for the entire frame (which may
-	// currently have 0, 1, or more defers active).
-	openDefer bool
+	rangefunc bool    // true for rangefunc list
 	sp        uintptr // sp at time of defer
 	pc        uintptr // pc at time of defer
 	fn        func()  // can be nil for open-coded defers
-	_panic    *_panic // panic that is running defer
 	link      *_defer // next defer on G; can point to either heap or stack!

-	// If openDefer is true, the fields below record values about the stack
-	// frame and associated function that has the open-coded defer(s). sp
-	// above will be the sp for the frame, and pc will be address of the
-	// deferreturn call in the function.
-	fd   unsafe.Pointer // funcdata for the function associated with the frame
-	varp uintptr        // value of varp for the stack frame
-	// framepc is the current pc associated with the stack frame. Together,
-	// with sp above (which is the sp associated with the stack frame),
-	// framepc/sp can be used as pc/sp pair to continue a stack trace via
-	// gentraceback().
-	framepc uintptr
+	// If rangefunc is true, *head is the head of the atomic linked list
+	// during a range-over-func execution.
+	head *atomic.Pointer[_defer]
 }
 type gobuf struct {
 	// The offsets of sp, pc, and g are known to (hard-coded in) libmach.
@@ -203,12 +215,31 @@ type ancestorInfo struct {
 }
 type goroutineProfileStateHolder atomic.Uint32
 type gTraceState struct {
-	sysExitTime        traceTime // timestamp when syscall has returned
-	tracedSyscallEnter bool      // syscall or cgo was entered while trace was enabled or StartTrace has emitted EvGoInSyscall about this goroutine
-	seq                uint64    // trace event sequencer
-	lastP              puintptr  // last P emitted an event for this goroutine
+	traceSchedResourceState
 }
 type traceTime uint64
+type coro struct {
+	gp guintptr
+	f  func(*coro)
+}
+type traceSchedResourceState struct {
+	// statusTraced indicates whether a status event was traced for this resource
+	// a particular generation.
+	//
+	// There are 3 of these because when transitioning across generations, traceAdvance
+	// needs to be able to reliably observe whether a status was traced for the previous
+	// generation, while we need to clear the value for the next generation.
+	statusTraced [3]atomic.Uint32
+
+	// seq is the sequence counter for this scheduling resource's events.
+	// The purpose of the sequence counter is to establish a partial order between
+	// events that don't obviously happen serially (same M) in the stream ofevents.
+	//
+	// There are two of these so that we can reset the counter on each generation.
+	// This saves space in the resulting trace by keeping the counter small and allows
+	// GoStatus and GoCreate events to omit a sequence number (implicitly 0).
+	seq [2]uint64
+}
 type uintreg uint          // FIXME wrong on amd64p32
 type m struct{}            // FIXME stub
 type sudog struct{}        // FIXME stub

tracing/internal/xruntime/g_typedef

 #!/bin/bash
 # g_typedef -- generate type definition of runtime.g
 #
-# Copyright (C) 2017-2023  Nexedi SA and Contributors.
+# Copyright (C) 2017-2024  Nexedi SA and Contributors.
 #                          Kirill Smelkov <kirr@nexedi.com>
 #
 # This program is free software: you can Use, Study, Modify and Redistribute
@@ -82,6 +82,11 @@ typedef_g() {
 		typedef runtime.gTraceState
 		typedef runtime.traceTime
 	fi
+
+	if (( $govern >= 122 )); then
+		typedef runtime.coro
+		typedef runtime.traceSchedResourceState
+	fi
 }
 
 # typedef_g_fixed - print adjusted <g> & friends definitions
@@ -126,7 +131,7 @@ gen_zruntime() {
 
 
 # main driver
-gov="go18 go19 go1.10 go1.11 go1.12 go1.13 go1.14 go1.15 go1.16 go1.17 go1.18 go1.19 go1.20 go1.21"
+gov="go18 go19 go1.10 go1.11 go1.12 go1.13 go1.14 go1.15 go1.16 go1.17 go1.18 go1.19 go1.20 go1.21 go1.22"
 
 for g in $gov; do
 	goset $g

tracing/internal/xruntime/zruntime_g_go1.22.go

+// Code generated by g_typedef; DO NOT EDIT.
+
+//go:build go1.22 && !go1.23
+// +build go1.22,!go1.23
+
+package xruntime
+
+import "unsafe"
+import "sync/atomic"
+
+type g struct {
+	// Stack parameters.
+	// stack describes the actual stack memory: [stack.lo, stack.hi).
+	// stackguard0 is the stack pointer compared in the Go stack growth prologue.
+	// It is stack.lo+StackGuard normally, but can be StackPreempt to trigger a preemption.
+	// stackguard1 is the stack pointer compared in the //go:systemstack stack growth prologue.
+	// It is stack.lo+StackGuard on g0 and gsignal stacks.
+	// It is ~0 on other goroutine stacks, to trigger a call to morestackc (and crash).
+	stack       stack   // offset known to runtime/cgo
+	stackguard0 uintptr // offset known to liblink
+	stackguard1 uintptr // offset known to liblink
+
+	_panic    *_panic // innermost panic - offset known to liblink
+	_defer    *_defer // innermost defer
+	m         *m      // current m; offset known to arm liblink
+	sched     gobuf
+	syscallsp uintptr // if status==Gsyscall, syscallsp = sched.sp to use during gc
+	syscallpc uintptr // if status==Gsyscall, syscallpc = sched.pc to use during gc
+	stktopsp  uintptr // expected sp at top of stack, to check in traceback
+	// param is a generic pointer parameter field used to pass
+	// values in particular contexts where other storage for the
+	// parameter would be difficult to find. It is currently used
+	// in four ways:
+	// 1. When a channel operation wakes up a blocked goroutine, it sets param to
+	//    point to the sudog of the completed blocking operation.
+	// 2. By gcAssistAlloc1 to signal back to its caller that the goroutine completed
+	//    the GC cycle. It is unsafe to do so in any other way, because the goroutine's
+	//    stack may have moved in the meantime.
+	// 3. By debugCallWrap to pass parameters to a new goroutine because allocating a
+	//    closure in the runtime is forbidden.
+	// 4. When a panic is recovered and control returns to the respective frame,
+	//    param may point to a savedOpenDeferState.
+	param        unsafe.Pointer
+	atomicstatus atomic.Uint32
+	stackLock    uint32 // sigprof/scang lock; TODO: fold in to atomicstatus
+	goid         uint64
+	schedlink    guintptr
+	waitsince    int64      // approx time when the g become blocked
+	waitreason   waitReason // if status==Gwaiting
+
+	preempt       bool // preemption signal, duplicates stackguard0 = stackpreempt
+	preemptStop   bool // transition to _Gpreempted on preemption; otherwise, just deschedule
+	preemptShrink bool // shrink stack at synchronous safe point
+
+	// asyncSafePoint is set if g is stopped at an asynchronous
+	// safe point. This means there are frames on the stack
+	// without precise pointer information.
+	asyncSafePoint bool
+
+	paniconfault bool // panic (instead of crash) on unexpected fault address
+	gcscandone   bool // g has scanned stack; protected by _Gscan bit in status
+	throwsplit   bool // must not split stack
+	// activeStackChans indicates that there are unlocked channels
+	// pointing into this goroutine's stack. If true, stack
+	// copying needs to acquire channel locks to protect these
+	// areas of the stack.
+	activeStackChans bool
+	// parkingOnChan indicates that the goroutine is about to
+	// park on a chansend or chanrecv. Used to signal an unsafe point
+	// for stack shrinking.
+	parkingOnChan atomic.Bool
+	// inMarkAssist indicates whether the goroutine is in mark assist.
+	// Used by the execution tracer.
+	inMarkAssist bool
+	coroexit     bool // argument to coroswitch_m
+
+	raceignore    int8  // ignore race detection events
+	nocgocallback bool  // whether disable callback from C
+	tracking      bool  // whether we're tracking this G for sched latency statistics
+	trackingSeq   uint8 // used to decide whether to track this G
+	trackingStamp int64 // timestamp of when the G last started being tracked
+	runnableTime  int64 // the amount of time spent runnable, cleared when running, only used when tracking
+	lockedm       muintptr
+	sig           uint32
+	writebuf      []byte
+	sigcode0      uintptr
+	sigcode1      uintptr
+	sigpc         uintptr
+	parentGoid    uint64          // goid of goroutine that created this goroutine
+	gopc          uintptr         // pc of go statement that created this goroutine
+	ancestors     *[]ancestorInfo // ancestor information goroutine(s) that created this goroutine (only used if debug.tracebackancestors)
+	startpc       uintptr         // pc of goroutine function
+	racectx       uintptr
+	waiting       *sudog         // sudog structures this g is waiting on (that have a valid elem ptr); in lock order
+	cgoCtxt       []uintptr      // cgo traceback context
+	labels        unsafe.Pointer // profiler labels
+	timer         *timer         // cached timer for time.Sleep
+	selectDone    atomic.Uint32  // are we participating in a select and did someone win the race?
+
+	coroarg *coro // argument during coroutine transfers
+
+	// goroutineProfiled indicates the status of this goroutine's stack for the
+	// current in-progress goroutine profile
+	goroutineProfiled goroutineProfileStateHolder
+
+	// Per-G tracer state.
+	trace gTraceState
+
+	// gcAssistBytes is this G's GC assist credit in terms of
+	// bytes allocated. If this is positive, then the G has credit
+	// to allocate gcAssistBytes bytes without assisting. If this
+	// is negative, then the G must correct this by performing
+	// scan work. We track this in bytes to make it fast to update
+	// and check for debt in the malloc hot path. The assist ratio
+	// determines how this corresponds to scan work debt.
+	gcAssistBytes int64
+}
+type stack struct {
+	lo uintptr
+	hi uintptr
+}
+type _panic struct {
+	argp unsafe.Pointer // pointer to arguments of deferred call run during panic; cannot move - known to liblink
+	arg  interface{}    // argument to panic
+	link *_panic        // link to earlier panic
+
+	// startPC and startSP track where _panic.start was called.
+	startPC uintptr
+	startSP unsafe.Pointer
+
+	// The current stack frame that we're running deferred calls for.
+	sp unsafe.Pointer
+	lr uintptr
+	fp unsafe.Pointer
+
+	// retpc stores the PC where the panic should jump back to, if the
+	// function last returned by _panic.next() recovers the panic.
+	retpc uintptr
+
+	// Extra state for handling open-coded defers.
+	deferBitsPtr *uint8
+	slotsPtr     unsafe.Pointer
+
+	recovered   bool // whether this panic has been recovered
+	goexit      bool
+	deferreturn bool
+}
+type _defer struct {
+	heap      bool
+	rangefunc bool    // true for rangefunc list
+	sp        uintptr // sp at time of defer
+	pc        uintptr // pc at time of defer
+	fn        func()  // can be nil for open-coded defers
+	link      *_defer // next defer on G; can point to either heap or stack!
+
+	// If rangefunc is true, *head is the head of the atomic linked list
+	// during a range-over-func execution.
+	head *atomic.Pointer[_defer]
+}
+type gobuf struct {
+	// The offsets of sp, pc, and g are known to (hard-coded in) libmach.
+	//
+	// ctxt is unusual with respect to GC: it may be a
+	// heap-allocated funcval, so GC needs to track it, but it
+	// needs to be set and cleared from assembly, where it's
+	// difficult to have write barriers. However, ctxt is really a
+	// saved, live register, and we only ever exchange it between
+	// the real register and the gobuf. Hence, we treat it as a
+	// root during stack scanning, which means assembly that saves
+	// and restores it doesn't need write barriers. It's still
+	// typed as a pointer so that any other writes from Go get
+	// write barriers.
+	sp   uintptr
+	pc   uintptr
+	g    guintptr
+	ctxt unsafe.Pointer
+	ret  uintptr
+	lr   uintptr
+	bp   uintptr // for framepointer-enabled architectures
+}
+type funcval struct {
+	fn uintptr
+}
+type timer struct {
+	// If this timer is on a heap, which P's heap it is on.
+	// puintptr rather than *p to match uintptr in the versions
+	// of this struct defined in other packages.
+	pp puintptr
+
+	// Timer wakes up at when, and then at when+period, ... (period > 0 only)
+	// each time calling f(arg, now) in the timer goroutine, so f must be
+	// a well-behaved function and not block.
+	//
+	// when must be positive on an active timer.
+	when   int64
+	period int64
+	f      func(interface{}, uintptr)
+	arg    interface{}
+	seq    uintptr
+
+	// What to set the when field to in timerModifiedXX status.
+	nextwhen int64
+
+	// The status field holds one of the values below.
+	status atomic.Uint32
+}
+type guintptr uintptr
+type puintptr uintptr
+type muintptr uintptr
+type waitReason uint8
+type ancestorInfo struct {
+	pcs  []uintptr // pcs from the stack of this goroutine
+	goid uint64    // goroutine id of this goroutine; original goroutine possibly dead
+	gopc uintptr   // pc of go statement that created this goroutine
+}
+type goroutineProfileStateHolder atomic.Uint32
+type gTraceState struct {
+	traceSchedResourceState
+}
+type traceTime uint64
+type coro struct {
+	gp guintptr
+	f  func(*coro)
+}
+type traceSchedResourceState struct {
+	// statusTraced indicates whether a status event was traced for this resource
+	// a particular generation.
+	//
+	// There are 3 of these because when transitioning across generations, traceAdvance
+	// needs to be able to reliably observe whether a status was traced for the previous
+	// generation, while we need to clear the value for the next generation.
+	statusTraced [3]atomic.Uint32
+
+	// seq is the sequence counter for this scheduling resource's events.
+	// The purpose of the sequence counter is to establish a partial order between
+	// events that don't obviously happen serially (same M) in the stream ofevents.
+	//
+	// There are two of these so that we can reset the counter on each generation.
+	// This saves space in the resulting trace by keeping the counter small and allows
+	// GoStatus and GoCreate events to omit a sequence number (implicitly 0).
+	seq [2]uint64
+}
+type uintreg uint          // FIXME wrong on amd64p32
+type m struct{}            // FIXME stub
+type sudog struct{}        // FIXME stub
+type timersBucket struct{} // FIXME stub