private static void updateFreeMemory() { freeMemory = 0; FreeChunkHolder freeChunkPtr = currentChunkPointer; for (int i = 0; i < freeChunks; ++i) { freeMemory += freeChunkPtr.value.size; freeChunkPtr = Structure.add(FreeChunkHolder.class, freeChunkPtr, 1); } }
private static FreeChunkHolder getFreeChunk(int index) { return Structure.add(FreeChunkHolder.class, currentChunkPointer, index); }
private static boolean getAvailableChunkIfPossible(int size) { if (freeChunks == 0) { return false; } while (true) { if (currentChunk.toAddress().add(size) == currentChunkLimit) { break; } if (currentChunk.toAddress().add(size + Structure.sizeOf(FreeChunk.class)).isLessThan(currentChunkLimit)) { break; } if (--freeChunks == 0) { return false; } freeMemory -= currentChunk.size; currentChunkPointer = Structure.add(FreeChunkHolder.class, currentChunkPointer, 1); currentChunk = currentChunkPointer.value; currentChunkLimit = currentChunk.toAddress().add(currentChunk.size); } return true; }
@Unmanaged public static void throwException(Throwable exception) { thrownException = exception; RuntimeObject exceptionPtr = Address.ofObject(exception).toStructure(); RuntimeClass exceptionClass = RuntimeClass.getClass(exceptionPtr); Address stackFrame = ShadowStack.getStackTop(); stackLoop: while (stackFrame != null) { int callSiteId = ShadowStack.getCallSiteId(stackFrame); CallSite callSite = findCallSiteById(callSiteId); ExceptionHandler handler = callSite.firstHandler; for (int i = 0; i < callSite.handlerCount; ++i) { if (handler.exceptionClass == null || handler.exceptionClass.isSupertypeOf.apply(exceptionClass)) { ShadowStack.setExceptionHandlerId(stackFrame, handler.id); break stackLoop; } handler = Structure.add(ExceptionHandler.class, handler, 1); } ShadowStack.setExceptionHandlerId(stackFrame, callSiteId - 1); stackFrame = ShadowStack.getNextStackFrame(stackFrame); } }
@Unmanaged public static RuntimeArray allocateMultiArray(RuntimeClass tag, Address dimensions, int dimensionCount) { int size = dimensions.getInt(); RuntimeArray array = allocateArray(tag, dimensions.getInt()).toStructure(); if (dimensionCount > 1) { Address arrayData = Structure.add(RuntimeArray.class, array, 1).toAddress(); arrayData = Address.align(arrayData, Address.sizeOf()); for (int i = 0; i < size; ++i) { RuntimeArray innerArray = allocateMultiArray(tag.itemType, dimensions.add(4), dimensionCount - 1); arrayData.putAddress(innerArray.toAddress()); arrayData = arrayData.add(Address.sizeOf()); } } return array; }
Region currentRegion = Structure.add(Region.class, regionsAddress(), currentRegionIndex); if (currentRegion.start == 0) { do { break loop; currentRegion = Structure.add(Region.class, regionsAddress(), currentRegionIndex); } while (currentRegion.start == 0); lastFreeSpace.size = (int) (object.toAddress().toLong() - lastFreeSpace.toAddress().toLong()); freeChunkPtr.value = lastFreeSpace; freeChunkPtr = Structure.add(FreeChunkHolder.class, freeChunkPtr, 1); freeChunks++; reclaimedSpace += lastFreeSpace.size; lastFreeSpace.size = freeSize; freeChunkPtr.value = lastFreeSpace; freeChunkPtr = Structure.add(FreeChunkHolder.class, freeChunkPtr, 1); freeChunks++; reclaimedSpace += freeSize;
Region region = Structure.add(Region.class, regionsAddress(), (int) (offset / regionSize())); short relativeOffset = (short) (offset % regionSize() + 1); if (region.start == 0 || region.start > relativeOffset) {
private static void updateFreeMemory() { freeMemory = 0; FreeChunkHolder freeChunkPtr = currentChunkPointer; for (int i = 0; i < freeChunks; ++i) { freeMemory += freeChunkPtr.value.size; freeChunkPtr = Structure.add(FreeChunkHolder.class, freeChunkPtr, 1); } }
private static FreeChunkHolder getFreeChunk(int index) { return Structure.add(FreeChunkHolder.class, currentChunkPointer, index); }
private static boolean getAvailableChunkIfPossible(int size) { if (freeChunks == 0) { return false; } while (true) { if (currentChunk.toAddress().add(size) == currentChunkLimit) { break; } if (currentChunk.toAddress().add(size + Structure.sizeOf(FreeChunk.class)).isLessThan(currentChunkLimit)) { break; } if (--freeChunks == 0) { return false; } freeMemory -= currentChunk.size; currentChunkPointer = Structure.add(FreeChunkHolder.class, currentChunkPointer, 1); currentChunk = currentChunkPointer.value; currentChunkLimit = currentChunk.toAddress().add(currentChunk.size); } return true; }
public static RuntimeArray allocateMultiArray(RuntimeClass tag, Address dimensions, int dimensionCount) { int size = dimensions.getInt(); RuntimeArray array = allocateArray(tag, dimensions.getInt()).toStructure(); if (dimensionCount > 1) { Address arrayData = Structure.add(RuntimeArray.class, array, 1).toAddress(); arrayData = Address.align(arrayData, Address.sizeOf()); for (int i = 0; i < size; ++i) { RuntimeArray innerArray = allocateMultiArray(tag.itemType, dimensions.add(4), dimensionCount - 1); arrayData.putAddress(innerArray.toAddress()); arrayData = arrayData.add(Address.sizeOf()); } } return array; }
@Unmanaged public static void throwException(Throwable exception) { thrownException = exception; RuntimeObject exceptionPtr = Address.ofObject(exception).toStructure(); RuntimeClass exceptionClass = RuntimeClass.getClass(exceptionPtr); Address stackFrame = ShadowStack.getStackTop(); stackLoop: while (stackFrame != null) { int callSiteId = ShadowStack.getCallSiteId(stackFrame); CallSite callSite = findCallSiteById(callSiteId); ExceptionHandler handler = callSite.firstHandler; for (int i = 0; i < callSite.handlerCount; ++i) { if (handler.exceptionClass == null || handler.exceptionClass.isSupertypeOf.apply(exceptionClass)) { ShadowStack.setExceptionHandlerId(stackFrame, handler.id); break stackLoop; } handler = Structure.add(ExceptionHandler.class, handler, 1); } ShadowStack.setExceptionHandlerId(stackFrame, callSiteId - 1); stackFrame = ShadowStack.getNextStackFrame(stackFrame); } }
Region currentRegion = Structure.add(Region.class, regionsAddress(), currentRegionIndex); if (currentRegion.start == 0) { do { break loop; currentRegion = Structure.add(Region.class, regionsAddress(), currentRegionIndex); } while (currentRegion.start == 0); lastFreeSpace.size = (int) (object.toAddress().toLong() - lastFreeSpace.toAddress().toLong()); freeChunkPtr.value = lastFreeSpace; freeChunkPtr = Structure.add(FreeChunkHolder.class, freeChunkPtr, 1); freeChunks++; reclaimedSpace += lastFreeSpace.size; lastFreeSpace.size = freeSize; freeChunkPtr.value = lastFreeSpace; freeChunkPtr = Structure.add(FreeChunkHolder.class, freeChunkPtr, 1); freeChunks++; reclaimedSpace += freeSize;
Region region = Structure.add(Region.class, regionsAddress(), (int) (offset / regionSize())); short relativeOffset = (short) (offset % regionSize() + 1); if (region.start == 0 || region.start > relativeOffset) {