func stackGuardMultiplier(race bool) int {
	// This arithmetic must match that in runtime/internal/sys/consts.go:StackGuardMultiplier.
	n := 1
	// On AIX, a larger stack is needed for syscalls.
	if buildcfg.GOOS == "aix" {
		n += 1
	}
	// The race build also needs more stack.
	if race {
		n += 1
	}
	return n

		perror("failed to register SIGUSR1 handler");
		exit(EXIT_FAILURE);
	}
}
*/
import "C"

func main() {
	ch := make(chan os.Signal, 1)
	signal.Notify(ch, syscall.SIGUSR2)

	C.register_handler(C.int(syscall.SIGUSR1))
	syscall.Kill(syscall.Getpid(), syscall.SIGUSR1)

	<-ch

	processSyscallReadTotalMD         = NewCounterMD(processSyscallReadTotal, "Total read SysCalls to the kernel. /proc/[pid]/io syscr")
	processSyscallWriteTotalMD        = NewCounterMD(processSyscallWriteTotal, "Total write SysCalls to the kernel. /proc/[pid]/io syscw")
	processResidentMemoryBytesMD      = NewGaugeMD(processResidentMemoryBytes, "Resident memory size in bytes")

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

package sys

import (
	"internal/goarch"
	"internal/goos"
)

// AIX requires a larger stack for syscalls.
// The race build also needs more stack. See issue 54291.
// This arithmetic must match that in cmd/internal/objabi/stack.go:stackGuardMultiplier.
const StackGuardMultiplier = 1 + goos.IsAix + isRace

// Copyright 2023 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.

// Tests a many interesting cases (network, syscalls, a little GC, busy goroutines,
// blocked goroutines, LockOSThread, pipes, and GOMAXPROCS).

//go:build ignore

package main

import (
	"log"
	"net"
	"os"
	"runtime"
	"runtime/trace"
	"sync"
	"time"
)

 * these function calls.
 */

// argset_t matches runtime/cgocall.go:argset.
typedef struct {
	uintptr_t* args;
	uintptr_t retval;
} argset_t;

// libc backed posix-compliant syscalls.

#define SET_RETVAL(fn) \
  uintptr_t ret = (uintptr_t) fn ; \
  if (ret == (uintptr_t) -1) {	   \
    x->retval = (uintptr_t) errno; \
  } else                           \
    x->retval = ret

void

				filelock.Unlock(f)
				f.Close()
				return nil, err
			}
		}
	}

	return f, nil
}

func closeFile(f *os.File) error {
	// Since locking syscalls operate on file descriptors, we must unlock the file
	// while the descriptor is still valid — that is, before the file is closed —
	// and avoid unlocking files that are already closed.
	err := filelock.Unlock(f)

// Copyright 2023 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.

// Tests a many interesting cases (network, syscalls, a little GC, busy goroutines,
// blocked goroutines, LockOSThread, pipes, and GOMAXPROCS).

//go:build ignore

package main

import (
	"bytes"
	"io"
	"log"
	"net"
	"os"
	"runtime"
	"runtime/trace"
	"sync"

	// calculate the rectangular box size.
	maxContentWidth := max(line1Length, line2Length)

	// termWidth is set to a default one to use when we are
	// not able to calculate terminal width via OS syscalls
	termWidth := 25
	if width, err := pb.GetTerminalWidth(); err == nil {
		termWidth = width
	}

	// Box cannot be printed if terminal width is small than maxContentWidth
	if maxContentWidth > termWidth {

	EvGoSysCall         = 28 // syscall enter [timestamp, stack]
	EvGoSysExit         = 29 // syscall exit [timestamp, goroutine id, seq, real timestamp]
	EvGoSysBlock        = 30 // syscall blocks [timestamp]
	EvGoWaiting         = 31 // denotes that goroutine is blocked when tracing starts [timestamp, goroutine id]
	EvGoInSyscall       = 32 // denotes that goroutine is in syscall when tracing starts [timestamp, goroutine id]