/*
* Copyright (c) 2019, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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*
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package com.oracle.svm.core.windows;
import org.graalvm.nativeimage.ImageSingletons;
import org.graalvm.nativeimage.Platform;
import org.graalvm.nativeimage.Platforms;
import org.graalvm.nativeimage.StackValue;
import org.graalvm.nativeimage.c.struct.SizeOf;
import org.graalvm.nativeimage.hosted.Feature;
import org.graalvm.word.Pointer;
import org.graalvm.word.UnsignedWord;
import com.oracle.svm.core.annotate.AutomaticFeature;
import com.oracle.svm.core.annotate.Uninterruptible;
import com.oracle.svm.core.stack.StackOverflowCheck;
import com.oracle.svm.core.windows.headers.MemoryAPI;
@Platforms({Platform.WINDOWS.class})
class WindowsStackOverflowSupport implements StackOverflowCheck.OSSupport {
@Uninterruptible(reason = "Called while thread is being attached to the VM, i.e., when the thread state is not yet set up.")
@Override
public UnsignedWord lookupStackEnd() {
MemoryAPI.MEMORY_BASIC_INFORMATION minfo = StackValue.get(MemoryAPI.MEMORY_BASIC_INFORMATION.class);
/*
* We find the boundary of the stack by looking at the base of the memory block that
* contains a (random known) address of the current stack. The stack-allocated memory where
* the function result is placed in is just the easiest way to get such an address.
*/
MemoryAPI.VirtualQuery(minfo, minfo, SizeOf.unsigned(MemoryAPI.MEMORY_BASIC_INFORMATION.class));
return (Pointer) minfo.AllocationBase();
}
}
@Platforms({Platform.WINDOWS.class})
@AutomaticFeature
class WindowsStackOverflowSupportFeature implements Feature {
@Override
public void afterRegistration(AfterRegistrationAccess access) {
ImageSingletons.add(StackOverflowCheck.OSSupport.class, new WindowsStackOverflowSupport());
}
}