Examples with TIB org.jikesrvm.objectmodel.TIB used on opensource projects

Example 6 with TIB

use of org.jikesrvm.objectmodel.TIB in project JikesRVM by JikesRVM.

the class MemoryManager method newRuntimeTable.

/**
 * Allocates a new runtime table (at runtime).
 *
 * @param size The size of the table
 * @param type the type for the table
 * @return the newly allocated table
 */
@NoInline
@Interruptible
public static Object newRuntimeTable(int size, RVMType type) {
    if (VM.VerifyAssertions)
        VM._assert(VM.runningVM);
    TIB realTib = type.getTypeInformationBlock();
    RVMArray fakeType = RVMType.WordArrayType;
    TIB fakeTib = fakeType.getTypeInformationBlock();
    int headerSize = ObjectModel.computeArrayHeaderSize(fakeType);
    int align = ObjectModel.getAlignment(fakeType);
    int offset = ObjectModel.getOffsetForAlignment(fakeType, false);
    int width = fakeType.getLogElementSize();
    /* Allocate a word array */
    Object array = allocateArray(size, width, headerSize, fakeTib, type.getMMAllocator(), align, offset, Plan.DEFAULT_SITE);
    /* Now we replace the TIB */
    ObjectModel.setTIB(array, realTib);
    return array;
}

Example 7 with TIB

use of org.jikesrvm.objectmodel.TIB in project JikesRVM by JikesRVM.

the class MemoryManager method newTIB.

/**
 * Allocates a new type information block (TIB).
 *
 * @param numVirtualMethods the number of virtual method slots in the TIB
 * @param alignCode alignment encoding for the TIB
 * @return the new TIB
 * @see AlignmentEncoding
 */
@NoInline
@Interruptible
public static TIB newTIB(int numVirtualMethods, int alignCode) {
    int elements = TIB.computeSize(numVirtualMethods);
    if (!VM.runningVM) {
        return TIB.allocate(elements, alignCode);
    }
    if (alignCode == AlignmentEncoding.ALIGN_CODE_NONE) {
        return (TIB) newRuntimeTable(elements, RVMType.TIBType);
    }
    RVMType type = RVMType.TIBType;
    if (VM.VerifyAssertions)
        VM._assert(VM.runningVM);
    TIB realTib = type.getTypeInformationBlock();
    RVMArray fakeType = RVMType.WordArrayType;
    TIB fakeTib = fakeType.getTypeInformationBlock();
    int headerSize = ObjectModel.computeArrayHeaderSize(fakeType);
    int align = ObjectModel.getAlignment(fakeType);
    int offset = ObjectModel.getOffsetForAlignment(fakeType, false);
    int width = fakeType.getLogElementSize();
    int elemBytes = elements << width;
    if (elemBytes < 0 || (elemBytes >>> width) != elements) {
        /* asked to allocate more than Integer.MAX_VALUE bytes */
        throwLargeArrayOutOfMemoryError();
    }
    int size = elemBytes + headerSize + AlignmentEncoding.padding(alignCode);
    Selected.Mutator mutator = Selected.Mutator.get();
    Address region = allocateSpace(mutator, size, align, offset, type.getMMAllocator(), Plan.DEFAULT_SITE);
    region = AlignmentEncoding.adjustRegion(alignCode, region);
    Object result = ObjectModel.initializeArray(region, fakeTib, elements, size);
    mutator.postAlloc(ObjectReference.fromObject(result), ObjectReference.fromObject(fakeTib), size, type.getMMAllocator());
    /* Now we replace the TIB */
    ObjectModel.setTIB(result, realTib);
    return (TIB) result;
}

Example 8 with TIB

use of org.jikesrvm.objectmodel.TIB in project JikesRVM by JikesRVM.

the class MemoryManager method newStack.

/**
 * Allocate a stack
 * @param bytes the number of bytes to allocate. Must be greater than
 *  0.
 * @return The stack
 */
@NoInline
@Unpreemptible
public static byte[] newStack(int bytes) {
    if (bytes <= 0) {
        if (VM.VerifyAssertions) {
            VM.sysWrite("Invalid stack size: ");
            VM.sysWrite(bytes);
            VM.sysWriteln("!");
            VM._assert(VM.NOT_REACHED, "Attempted to create stack with size (in bytes) of 0 or smaller!");
        } else {
            bytes = StackFrameLayout.getStackSizeNormal();
        }
    }
    if (!VM.runningVM) {
        return new byte[bytes];
    } else {
        RVMArray stackType = RVMArray.ByteArray;
        int headerSize = ObjectModel.computeArrayHeaderSize(stackType);
        int align = ObjectModel.getAlignment(stackType);
        int offset = ObjectModel.getOffsetForAlignment(stackType, false);
        int width = stackType.getLogElementSize();
        TIB stackTib = stackType.getTypeInformationBlock();
        return (byte[]) allocateArray(bytes, width, headerSize, stackTib, Plan.ALLOC_STACK, align, offset, Plan.DEFAULT_SITE);
    }
}

Example 9 with TIB

use of org.jikesrvm.objectmodel.TIB in project JikesRVM by JikesRVM.

the class MemoryManagerTest method allocateArrayTestPositive.

@Test
public void allocateArrayTestPositive() {
    int size = 20;
    RVMArray arrayType = RVMArray.IntArray;
    int headerSize = ObjectModel.computeArrayHeaderSize(arrayType);
    int align = ObjectModel.getAlignment(arrayType);
    int offset = ObjectModel.getOffsetForAlignment(arrayType, false);
    int width = arrayType.getLogElementSize();
    TIB arrayTib = arrayType.getTypeInformationBlock();
    int[] test = (int[]) MemoryManager.allocateArray(size, width, headerSize, arrayTib, ALLOC_NON_MOVING, align, offset, DEFAULT_SITE);
    assertEquals(test.length, 20);
}

Example 10 with TIB

use of org.jikesrvm.objectmodel.TIB in project JikesRVM by JikesRVM.

the class MemoryManagerTest method allocateArrayTestOverflowToPositive.

@Test(expected = OutOfMemoryError.class)
public void allocateArrayTestOverflowToPositive() {
    int size = 1 << 30;
    RVMArray arrayType = RVMArray.IntArray;
    int headerSize = ObjectModel.computeArrayHeaderSize(arrayType);
    int align = ObjectModel.getAlignment(arrayType);
    int offset = ObjectModel.getOffsetForAlignment(arrayType, false);
    int width = arrayType.getLogElementSize();
    TIB arrayTib = arrayType.getTypeInformationBlock();
    int[] test = (int[]) MemoryManager.allocateArray(size, width, headerSize, arrayTib, ALLOC_NON_MOVING, align, offset, DEFAULT_SITE);
    fail("FAIL! Created array with length " + test.length);
}