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8303577: [JVMCI] OOME causes crash while translating exceptions

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Reviewed-by: kvn, never
This commit is contained in:
Doug Simon 2023-03-06 16:10:02 +00:00
parent 877ab659b9
commit cac81ddc92
5 changed files with 31 additions and 9 deletions
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30
src/java.base/share/classes/jdk/internal/vm/VMSupport.java
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@ -113,15 +113,35 @@ public class VMSupport {
public static native String getVMTemporaryDirectory();
/**
* Decodes the exception encoded in {@code buffer} and throws it.
* Decodes the exception encoded in {@code errorOrBuffer} and throws it.
*
* @param buffer a native byte buffer containing an exception encoded by
* @param errorOrBuffer an error code or a native byte errorOrBuffer containing an exception encoded by
* {@link #encodeThrowable}. Error code values and their meanings are:
*
* <pre>
* 0: native memory for the errorOrBuffer could not be allocated
* -1: an OutOfMemoryError was thrown while encoding the exception
* -2: some other throwable was thrown while encoding the exception
* </pre>
* @param errorOrBuffer a native byte errorOrBuffer containing an exception encoded by
* {@link #encodeThrowable}
* @param inJVMHeap [@code true} if executing in the JVM heap, {@code false} otherwise
*/
public static void decodeAndThrowThrowable(long buffer) throws Throwable {
int encodingLength = U.getInt(buffer);
public static void decodeAndThrowThrowable(long errorOrBuffer, boolean inJVMHeap) throws Throwable {
if (errorOrBuffer >= -2L && errorOrBuffer <= 0) {
String context = String.format("while encoding an exception to translate it %s the JVM heap",
inJVMHeap ? "to" : "from");
if (errorOrBuffer == 0) {
throw new InternalError("native errorOrBuffer could not be allocated " + context);
}
if (errorOrBuffer == -1L) {
throw new OutOfMemoryError("OutOfMemoryError occurred " + context);
}
throw new InternalError("unexpected problem occurred " + context);
}
int encodingLength = U.getInt(errorOrBuffer);
byte[] encoding = new byte[encodingLength];
U.copyMemory(null, buffer + 4, encoding, Unsafe.ARRAY_BYTE_BASE_OFFSET, encodingLength);
U.copyMemory(null, errorOrBuffer + 4, encoding, Unsafe.ARRAY_BYTE_BASE_OFFSET, encodingLength);
throw TranslatedException.decodeThrowable(encoding);
}