'/opt/jdk/oracle-jdk-8/jre/bin/java'                       | '/opt/jdk/oracle-jdk-8/bin/jstack'
    }

    @Requires(UnitTestPreconditions.Windows)
    def 'can locate jstack on Windows'() {
        expect:
        new JavaProcessStackTracesMonitor.JavaProcessInfo('0', javaCommand).jstackCommand == jstackCommand

        where:

                return javaPath.resolve("../../../bin/jstack").normalize().toString();
            } else {
                return javaPath.resolve("../../bin/jstack").normalize().toString();
            }
        }

        String jstack() {
            try {
                ExecResult result = run(getJstackCommand(), pid);

            }
        } finally {
            httpExchange.close();
        }
    }

    // Dump all JVMs' threads on the machine to troubleshoot deadlock issues
    // We observed jstack hanging on windows, so for now we only enable it for Linux
    private void dumpThreadsUponTimeout(String stacktrace) {

	// allocation.
	if newsize < fixedStack {
		return
	}
	// Compute how much of the stack is currently in use and only
	// shrink the stack if gp is using less than a quarter of its
	// current stack. The currently used stack includes everything
	// down to the SP plus the stack guard space that ensures
	// there's room for nosplit functions.
	avail := gp.stack.hi - gp.stack.lo

  // listed in places.
  function totalValue(places) {
    const seen = new Set();
    let pos = 0;
    let neg = 0;
    for (const place of places) {
      if (seen.has(place.Stack)) continue; // Do not double-count stacks
      seen.add(place.Stack);
      const stack = stacks.Stacks[place.Stack];
      if (stack.Value < 0) {
	neg += -stack.Value;
      } else {

	EvUserTaskEnd     // end of a task [timestamp, internal task ID, stack ID]
	EvUserRegionBegin // trace.{Start,With}Region [timestamp, internal task ID, name string ID, stack ID]
	EvUserRegionEnd   // trace.{End,With}Region [timestamp, internal task ID, name string ID, stack ID]
	EvUserLog         // trace.Log [timestamp, internal task ID, key string ID, value string ID, stack]

	// Coroutines. Added in Go 1.23.

	// Now on a scheduling stack (a pthread-created stack).
g0:
	// Save room for two of our pointers.
	ADDV	$-16, R29
	MOVV	R2, 0(R29)	// save old g on stack
	MOVV	(g_stack+stack_hi)(R2), R2
	SUBVU	R3, R2
	MOVV	R2, 8(R29)	// save depth in old g stack (can't just save SP, as stack might be copied during a callback)
	JAL	(R25)

	// Restore g, stack pointer. R2 is return value.
	MOVV	0(R29), g

	BR	runtime·badmcall2(SB)

// systemstack_switch is a dummy routine that systemstack leaves at the bottom
// of the G stack.  We need to distinguish the routine that
// lives at the bottom of the G stack from the one that lives
// at the top of the system stack because the one at the top of
// the system stack terminates the stack walk (see topofstack()).
TEXT runtime·systemstack_switch(SB), NOSPLIT, $0-0
	UNDEF

	// Now on a scheduling stack (a pthread-created stack).
g0:
	// Save room for two of our pointers.
	SUB	$16, X2
	MOV	X9, 0(X2)	// save old g on stack
	MOV	(g_stack+stack_hi)(X9), X9
	SUB	X8, X9, X8
	MOV	X8, 8(X2)	// save depth in old g stack (can't just save SP, as stack might be copied during a callback)

	JALR	RA, (X5)

	// Restore g, stack pointer. X10 is return value.
	MOV	0(X2), g

	MOVW	R2, 16(R29)	// save old g on stack
	MOVW	(g_stack+stack_hi)(R2), R2
	SUBU	R3, R2
	MOVW	R2, 20(R29)	// save depth in old g stack (can't just save SP, as stack might be copied during a callback)
	JAL	(R25)

	// Restore g, stack pointer. R2 is return value.
	MOVW	16(R29), g
	JAL	runtime·save_g(SB)
	MOVW	(g_stack+stack_hi)(g), R5
	MOVW	20(R29), R6
	SUBU	R6, R5
	MOVW	R5, R29