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)

//go:linkname Malloc runtime.msanmalloc
func Malloc(addr unsafe.Pointer, sz uintptr)

//go:linkname Free runtime.msanfree
func Free(addr unsafe.Pointer, sz uintptr)

//go:linkname Move runtime.msanmove

// Fixed-size object allocator. Returned memory is not zeroed.
//
// See malloc.go for overview.

package runtime

import (
	"runtime/internal/sys"
	"unsafe"
)

// fixalloc is a simple free-list allocator for fixed size objects.
// Malloc uses a FixAlloc wrapped around sysAlloc to manage its
// mcache and mspan objects.
//
// Memory returned by fixalloc.alloc is zeroed by default, but the

// Copyright 2009 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.

// Malloc small size classes.
//
// See malloc.go for overview.
// See also mksizeclasses.go for how we decide what size classes to use.

package runtime

// Returns size of the memory block that mallocgc will allocate if you ask for the size,
// minus any inline space for metadata.

	// MALLOC metadata             103ce8000-103cec000    [   16K    16K    16K     0K] r--/rwx SM=COW          DefaultMallocZone_0x103ce8000 zone structure
	// MALLOC guard page           103cf0000-103cf4000    [   16K     0K     0K     0K] ---/rwx SM=COW
	// MALLOC guard page           103cfc000-103d00000    [   16K     0K     0K     0K] ---/rwx SM=COW

extern "C" {

TF_Buffer* TF_NewBuffer() { return new TF_Buffer{nullptr, 0, nullptr}; }

TF_Buffer* TF_NewBufferFromString(const void* proto, size_t proto_len) {
  void* copy = tensorflow::port::Malloc(proto_len);
  std::memcpy(copy, proto, proto_len);

  TF_Buffer* buf = new TF_Buffer;
  buf->data = copy;
  buf->length = proto_len;
  buf->data_deallocator = [](void* data, size_t length) {

	stack_t ss;
	int i;
	stack_t nss;
	struct timespec ts;

	// Set up an alternate signal stack for this thread.
	memset(&ss, 0, sizeof ss);
	ss.ss_sp = malloc(CSIGSTKSZ);
	if (ss.ss_sp == NULL) {
		die("malloc");
	}
	ss.ss_flags = 0;
	ss.ss_size = CSIGSTKSZ;
	if (sigaltstack(&ss, NULL) < 0) {
		die("sigaltstack");
	}

	// Send ourselves a SIGIO.  This will be caught by the Go

#else   /* MEMTRACE */
  /** Standard calloc() if MEMTRACE not defined. */
  #define CU_CALLOC(x, y)         calloc((x), (y))
  /** Standard malloc() if MEMTRACE not defined. */
  #define CU_MALLOC(x)            malloc((x))
  /** Standard free() if MEMTRACE not defined. */
  #define CU_FREE(x)              free((x))
  /** Standard realloc() if MEMTRACE not defined. */
  #define CU_REALLOC(x, y)        realloc((x), (y))

// license that can be found in the LICENSE file.

//go:build linux && cgo

// On systems that use glibc, calling malloc can create a new arena,
// and creating a new arena can read /sys/devices/system/cpu/online.
// If we are using cgo, we will call malloc when creating a new thread.
// That can break TestExtraFiles if we create a new thread that creates

x_cgo_init(G *g, void (*setg)(void*))
{
	uintptr *pbounds;

	// Deal with memory sanitizer/clang interaction.
	// See gcc_linux_amd64.c for details.
	setg_gcc = setg;
	pbounds = (uintptr*)malloc(2 * sizeof(uintptr));
	if (pbounds == NULL) {
		fatalf("malloc failed: %s", strerror(errno));
	}
	_cgo_set_stacklo(g, pbounds);
	free(pbounds);
}

void
_cgo_sys_thread_start(ThreadStart *ts)
{
	pthread_attr_t attr;

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package issue23555

// #include <stdlib.h>
import "C"

func X() {
	C.free(C.malloc(10))