// ************************************
// alloc / free
// ************************************
public virtual IntPtr Alloc(ulong length)
{
#pragma warning disable 162
if (Debug.On)
{
Logger.LogDebug("attempting to alloc length {length}", length);
}
#pragma warning restore 162
libc.getrlimit(GetMemLockLimit(), out var rlim);
if (rlim.rlim_max != rlimit.UNLIMITED && rlim.rlim_max < length)
{
throw new MemoryLimitException(
$"Requested MemLock length exceeds resource limit max of {rlim.rlim_max}");
}
// Some platforms may require fd to be -1 even if using anonymous
IntPtr protectedMemory = libc.mmap(
IntPtr.Zero, length, GetProtReadWrite(), GetPrivateAnonymousFlags(), -1, 0);
CheckIntPtr(protectedMemory, "mmap");
try
{
CheckZero(libc.mlock(protectedMemory, length), "mlock");
try
{
SetNoDump(protectedMemory, length);
}
catch (Exception e)
{
CheckZero(libc.munlock(protectedMemory, length), "munlock", e);
throw;
}
}
catch (Exception e)
{
CheckZero(libc.munmap(protectedMemory, length), "munmap", e);
throw;
}
return(protectedMemory);
}
// ************************************
// alloc / free
// ************************************
public virtual IntPtr Alloc(ulong length)
{
if (Interlocked.Read(ref memoryLocked) + (long)length > resourceLimit)
{
throw new MemoryLimitException(
$"Requested MemLock length exceeds resource limit max of {resourceLimit}");
}
// Some platforms may require fd to be -1 even if using anonymous
IntPtr protectedMemory = libc.mmap(
IntPtr.Zero, length, GetProtReadWrite(), GetPrivateAnonymousFlags(), -1, 0);
Check.IntPtr(protectedMemory, "mmap");
try
{
Check.Zero(libc.mlock(protectedMemory, length), "mlock");
try
{
Interlocked.Add(ref memoryLocked, (long)length);
SetNoDump(protectedMemory, length);
}
catch (Exception e)
{
Check.Zero(libc.munlock(protectedMemory, length), "munlock", e);
Interlocked.Add(ref memoryLocked, 0 - (long)length);
throw;
}
}
catch (Exception e)
{
Check.Zero(libc.munmap(protectedMemory, length), "munmap", e);
throw;
}
return(protectedMemory);
}
