com.oracle.svm.truffle.nfi.NativeSignature Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of svm Show documentation
Show all versions of svm Show documentation
SubstrateVM image builder components
/*
* Copyright (c) 2017, 2017, 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.oracle.svm.truffle.nfi;
import com.oracle.svm.core.posix.headers.Errno;
import com.oracle.svm.truffle.nfi.NativeAPI.NativeTruffleContext;
import com.oracle.svm.truffle.nfi.NativeAPI.NativeTruffleEnv;
import static com.oracle.svm.truffle.nfi.Target_com_oracle_truffle_nfi_impl_NativeArgumentBuffer_TypeTag.getOffset;
import static com.oracle.svm.truffle.nfi.Target_com_oracle_truffle_nfi_impl_NativeArgumentBuffer_TypeTag.getTag;
import com.oracle.svm.truffle.nfi.libffi.LibFFI;
import com.oracle.svm.truffle.nfi.libffi.LibFFI.ffi_cif;
import com.oracle.svm.truffle.nfi.libffi.LibFFI.ffi_type;
import com.oracle.svm.truffle.nfi.libffi.LibFFI.ffi_type_array;
import com.oracle.svm.truffle.nfi.libffi.LibFFIHeaderDirectives;
import org.graalvm.nativeimage.PinnedObject;
import org.graalvm.nativeimage.StackValue;
import org.graalvm.nativeimage.UnmanagedMemory;
import org.graalvm.nativeimage.c.CContext;
import org.graalvm.nativeimage.c.struct.CFieldAddress;
import org.graalvm.nativeimage.c.struct.CStruct;
import org.graalvm.nativeimage.c.struct.SizeOf;
import org.graalvm.nativeimage.c.type.CIntPointer;
import org.graalvm.nativeimage.c.type.WordPointer;
import org.graalvm.word.Pointer;
import org.graalvm.word.PointerBase;
import org.graalvm.word.WordBase;
import org.graalvm.word.WordFactory;
final class NativeSignature {
@CContext(LibFFIHeaderDirectives.class)
@CStruct("svm_cif_data")
public interface CifData extends PointerBase {
@CFieldAddress
ffi_cif cif();
@CFieldAddress
ffi_type_array args();
}
static class PrepareHelper {
static CifData prepareArgs(Target_com_oracle_truffle_nfi_impl_LibFFIType... args) {
CifData data = UnmanagedMemory.malloc(SizeOf.get(CifData.class) + args.length * SizeOf.get(ffi_type_array.class));
for (int i = 0; i < args.length; i++) {
data.args().write(i, WordFactory.pointer(args[i].type));
}
return data;
}
static long checkRet(CifData data, int ret) {
if (ret == LibFFI.FFI_OK()) {
return data.rawValue();
} else {
UnmanagedMemory.free(data);
return 0;
}
}
}
static class ExecuteHelper {
static int alignUp(int index, int alignment) {
int ret = index;
if (ret % alignment != 0) {
ret += alignment - (ret % alignment);
}
return ret;
}
static void execute(NativeTruffleContext ctx, ffi_cif cif, PointerBase ret, long functionPointer, byte[] primArgs, int patchCount, int[] patchOffsets, Object[] objArgs,
LocalNativeScope scope) {
int nargs = cif.nargs();
WordPointer argPtrs = UnmanagedMemory.malloc(nargs * SizeOf.get(WordPointer.class));
// TODO WordPointer argPtrs = StackValue.get(nargs, SizeOf.get(WordPointer.class));
NativeTruffleEnv env = StackValue.get(NativeTruffleEnv.class);
NFIInitialization.initializeEnv(env, ctx);
try (PinnedObject primBuffer = PinnedObject.create(primArgs)) {
Pointer prim = primBuffer.addressOfArrayElement(0);
int primIdx = 0;
for (int i = 0; i < nargs; i++) {
ffi_type type = cif.arg_types().read(i);
primIdx = alignUp(primIdx, type.alignment());
argPtrs.write(i, prim.add(primIdx));
primIdx += type.size().rawValue();
}
for (int i = 0; i < patchCount; i++) {
Target_com_oracle_truffle_nfi_impl_NativeArgumentBuffer_TypeTag tag = getTag(patchOffsets[i]);
int offset = getOffset(patchOffsets[i]);
Object obj = objArgs[i];
if (tag == Target_com_oracle_truffle_nfi_impl_NativeArgumentBuffer_TypeTag.OBJECT) {
WordBase handle = scope.createLocalHandle(obj);
prim.writeWord(offset, handle);
} else if (tag == Target_com_oracle_truffle_nfi_impl_NativeArgumentBuffer_TypeTag.STRING) {
PointerBase strPtr = scope.pinString((String) obj);
prim.writeWord(offset, strPtr);
} else if (tag == Target_com_oracle_truffle_nfi_impl_NativeArgumentBuffer_TypeTag.CLOSURE) {
// nothing to do
} else if (tag == Target_com_oracle_truffle_nfi_impl_NativeArgumentBuffer_TypeTag.ENV) {
prim.writeWord(offset, env);
} else {
// all other types are array types, all of them are treated the same by svm
PointerBase arrPtr = scope.pinArray(obj);
prim.writeWord(offset, arrPtr);
}
}
CIntPointer errnoMirror = ErrnoMirror.getErrnoMirrorLocation();
Errno.set_errno(errnoMirror.read());
try {
LibFFI.ffi_call(cif, WordFactory.pointer(functionPointer), ret, argPtrs);
} finally {
errnoMirror.write(Errno.errno());
}
} finally {
UnmanagedMemory.free(argPtrs);
}
}
}
}