}

// SpanAlloc records an event indicating that the span has just been allocated.
func (tl traceLocker) SpanAlloc(s *mspan) {
	tl.eventWriter(traceGoRunning, traceProcRunning).commit(traceEvSpanAlloc, traceSpanID(s), traceArg(s.npages), traceSpanTypeAndClass(s))
}

// SpanFree records an event indicating that the span is about to be freed.
func (tl traceLocker) SpanFree(s *mspan) {

	return s
}

// Return span from an mcache.
//
// s must have a span class corresponding to this
// mcentral and it must not be empty.
func (c *mcentral) uncacheSpan(s *mspan) {
	if s.allocCount == 0 {
		throw("uncaching span but s.allocCount == 0")
	}

	sg := mheap_.sweepgen
	stale := s.sweepgen == sg+1

	// Fix up sweepgen.
	if stale {
		// Span was cached before sweep began. It's our

}

//go:nosplit
func validSIGPROF(mp *m, c *sigctxt) bool {
	return true
}

func osStackAlloc(s *mspan) {
	osStackRemap(s, _MAP_STACK)
}

func osStackFree(s *mspan) {
	// Undo MAP_STACK.
	osStackRemap(s, 0)
}

func osStackRemap(s *mspan, flags int32) {
	a, err := mmap(unsafe.Pointer(s.base()), s.npages*pageSize, _PROT_READ|_PROT_WRITE, _MAP_PRIVATE|_MAP_ANON|_MAP_FIXED|flags, -1, 0)

// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build msan

package msan

import (
	"unsafe"
)

const Enabled = true

//go:linkname Read runtime.msanread
func Read(addr unsafe.Pointer, sz uintptr)

//go:linkname Write runtime.msanwrite
func Write(addr unsafe.Pointer, sz uintptr)

// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build msan

package runtime

import (
	"unsafe"
)

// Public memory sanitizer API.

func MSanRead(addr unsafe.Pointer, len int) {
	msanread(addr, uintptr(len))
}

func MSanWrite(addr unsafe.Pointer, len int) {
	msanwrite(addr, uintptr(len))
}

 │                          │
 │  <span style="background-color:#272822"><font color="#FF4689">from</font></span><span style="background-color:#272822"><font color="#F8F8F2"> main </font></span><span style="background-color:#272822"><font color="#FF4689">import</font></span><span style="background-color:#272822"><font color="#F8F8F2"> app</font></span><span style="background-color:#272822">  </span>  │
 │                          │

          {{/* source line */ -}}
          <span class=line>{{printf " %6d" .Line}}</span>{{" " -}}
          <span class={{.HTMLClass}}>
            {{- printf "  %10s %10s %8s  %s " .Flat .Cumulative "" .SrcLine -}}
          </span>{{"" -}}

          {{if .Instructions -}}
            {{/* instructions for this source line */ -}}
            <span class=asm>{{"" -}}
            {{range .Instructions -}}

 │                          │
 │  <span style="background-color:#272822"><font color="#FF4689">from</font></span><span style="background-color:#272822"><font color="#F8F8F2"> main </font></span><span style="background-color:#272822"><font color="#FF4689">import</font></span><span style="background-color:#272822"><font color="#F8F8F2"> app</font></span><span style="background-color:#272822">  </span>  │
 │                          │

 │                          │
 │  <span style="background-color:#272822"><font color="#FF4689">from</font></span><span style="background-color:#272822"><font color="#F8F8F2"> main </font></span><span style="background-color:#272822"><font color="#FF4689">import</font></span><span style="background-color:#272822"><font color="#F8F8F2"> app</font></span><span style="background-color:#272822">  </span>  │
 │                          │

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