[GR-38965] Support heap dumps in GraalVM CE Native Image.

substratevm/CHANGELOG.md

@@ -4,8 +4,10 @@ This changelog summarizes major changes to GraalVM Native Image.
 
 ## Version 22.2.0
 * (GR-20653) Re-enable the usage of all CPU features for JIT compilation on AMD64.
-* (GR-38413) Add support for -XX:+ExitOnOutOfMemoryError.
+* (GR-38413) Add support for `-XX:+ExitOnOutOfMemoryError`.
 * (GR-37606) Add support for URLs and short descriptions to `Feature`. This info is shown as part of the build output.
+* (GR-38965) Heap dumps are now supported in Community Edition. 
+* (GR-38951) Add `-XX:+DumpHeapAndExit` option to dump the initial heap of a native executable.
 
 ## Version 22.1.0
 * (GR-36568) Add "Quick build" mode, enabled through option `-Ob`, for quicker native image builds.

substratevm/src/com.oracle.svm.core.posix/src/com/oracle/svm/core/posix/heapdump/AllocationFreeFileOutputStreamPosix.java

@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2022, 2022, 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.core.posix.heapdump;
+
+import java.io.FileDescriptor;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+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.type.CCharPointer;
+import org.graalvm.nativeimage.hosted.Feature;
+import org.graalvm.word.WordFactory;
+
+import com.oracle.svm.core.annotate.AutomaticFeature;
+import com.oracle.svm.core.heapdump.HeapDumpWriterImpl.AllocationFreeFileOutputStream;
+import com.oracle.svm.core.posix.PosixUtils;
+import com.oracle.svm.core.posix.headers.Unistd;
+import com.oracle.svm.core.util.VMError;
+
+/**
+ * Posix implementation of allocation-free output stream created from FileOutputStream.
+ *
+ */
+final class AllocationFreeFileOutputStreamPosix extends AllocationFreeFileOutputStream {
+
+    /**
+     * Pre-allocated exceptions, for throwing from code that must not allocate.
+     */
+    private static final IOException preallocatedIOException = new IOException("Write failed.");
+    private static final ArrayIndexOutOfBoundsException preallocatedArrayIndexOutOfBoundsException = new ArrayIndexOutOfBoundsException();
+
+    private FileOutputStream fos;
+    private FileDescriptor fileDescriptor;
+
+    AllocationFreeFileOutputStreamPosix() {
+
+    }
+
+    private AllocationFreeFileOutputStreamPosix(FileOutputStream fileOutputStream) throws IOException {
+        fos = fileOutputStream;
+        fileDescriptor = fos.getFD();
+
+        if (!(Platform.includedIn(Platform.LINUX.class) || Platform.includedIn(Platform.DARWIN.class))) {
+            /* See GR-9725 */
+            throw VMError.unsupportedFeature("Heap dump writing currently contains Posix specific code");
+        }
+    }
+
+    @Override
+    public AllocationFreeFileOutputStream newStreamFor(FileOutputStream fileOutputStream) throws IOException {
+        return new AllocationFreeFileOutputStreamPosix(fileOutputStream);
+    }
+
+    @Override
+    public void write(int b) throws IOException {
+        final CCharPointer buffer = StackValue.get(CCharPointer.class);
+        buffer.write((byte) b);
+        final boolean writeResult = PosixUtils.writeBytes(fileDescriptor, buffer, WordFactory.unsigned(1));
+        if (!writeResult) {
+            throw preallocatedIOException;
+        }
+    }
+
+    @Override
+    public void write(byte[] b, int off, int len) throws IOException {
+        /* Sanity check the arguments. */
+        if ((b == null) || ((off < 0) || (len < 0) || ((b.length - off) < len))) {
+            throw preallocatedArrayIndexOutOfBoundsException;
+        }
+
+        /*
+         * Stack allocation needs an allocation size that is a compile time constant, so we split
+         * the byte array up in multiple chunks and write them separately.
+         */
+        final int chunkSize = 256;
+        final CCharPointer bytes = StackValue.get(chunkSize);
+
+        int chunkOffset = off;
+        int inputLength = len;
+        while (inputLength > 0) {
+            int chunkLength = Math.min(inputLength, chunkSize);
+
+            for (int i = 0; i < chunkLength; i++) {
+                bytes.write(i, b[chunkOffset + i]);
+            }
+
+            if (!PosixUtils.writeBytes(fileDescriptor, bytes, WordFactory.unsigned(chunkLength))) {
+                throw preallocatedIOException;
+            }
+
+            chunkOffset += chunkLength;
+            inputLength -= chunkLength;
+        }
+    }
+
+    @Override
+    public void close() throws IOException {
+        fos.close();
+    }
+
+    @Override
+    public void flush() throws IOException {
+    }
+
+    /**
+     * Read the current position in a file descriptor.
+     */
+    @Override
+    protected long position() {
+        int fd = PosixUtils.getFD(fileDescriptor);
+        return Unistd.lseek(fd, WordFactory.zero(), Unistd.SEEK_CUR()).rawValue();
+    }
+
+    /**
+     * Set the current position in a file descriptor.
+     */
+    @Override
+    protected long position(long offset) {
+        int fd = PosixUtils.getFD(fileDescriptor);
+        return Unistd.lseek(fd, WordFactory.signed(offset), Unistd.SEEK_SET()).rawValue();
+    }
+}
+
+/*
+ * The limitation to Linux and Darwin is necessary because the implementation currently uses
+ * posix-dependent low-level code. See GR-9725.
+ */
+@Platforms({Platform.LINUX.class, Platform.DARWIN.class})
+@AutomaticFeature
+class AllocationFreeFileOutputStreamFeature implements Feature {
+
+    @Override
+    public void afterRegistration(Feature.AfterRegistrationAccess access) {
+        ImageSingletons.add(AllocationFreeFileOutputStream.class, new AllocationFreeFileOutputStreamPosix());
+    }
+}

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/heapdump/AllocationFreeOutputStream.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2022, 2022, 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.core.heapdump;
+
+import java.io.IOException;
+
+/**
+ * Simple interface for writing heap dump to arbitrary data source.
+ *
+ */
+public interface AllocationFreeOutputStream {
+
+    void write(int b) throws IOException;
+
+    void write(byte[] b, int offset, int length) throws IOException;
+
+    /**
+     * close method is called outside of critical section and can allocate objects.
+     *
+     * @throws IOException
+     */
+    void close() throws IOException;
+
+    void flush() throws IOException;
+
+}

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/heapdump/HeapDumpFeature.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2022, 2022, 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.core.heapdump;
+
+import java.io.FileOutputStream;
+
+import org.graalvm.nativeimage.ImageSingletons;
+import org.graalvm.nativeimage.hosted.Feature;
+import org.graalvm.nativeimage.impl.HeapDumpSupport;
+
+import com.oracle.svm.core.annotate.AutomaticFeature;
+
+@AutomaticFeature
+public final class HeapDumpFeature implements Feature {
+    @Override
+    public void afterRegistration(AfterRegistrationAccess access) {
+        ImageSingletons.add(HeapDumpSupport.class, new HeapDumpSupportImpl());
+    }
+}
+
+final class HeapDumpSupportImpl implements HeapDumpSupport {
+    @Override
+    public void dumpHeap(String outputFile, boolean live) throws java.io.IOException {
+        try (FileOutputStream fileOutputStream = new FileOutputStream(outputFile)) {
+            HeapDumpWriter.singleton().writeHeapTo(fileOutputStream, live);
+        }
+    }
+}