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8264827: Large mapped buffer/segment crash the VM when calling isLoaded

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Reviewed-by: alanb, mcimadamore
This commit is contained in:
Chris Hegarty 2021-04-12 11:21:34 +00:00
parent e604320bbd
commit 3c9858ddfb
5 changed files with 36 additions and 13 deletions
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8
src/java.base/unix/native/libnio/MappedMemoryUtils.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2021, 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
@ -56,11 +56,11 @@ static long calculate_number_of_pages_in_range(void* address, size_t len, size_t
JNIEXPORT jboolean JNICALL
Java_java_nio_MappedMemoryUtils_isLoaded0(JNIEnv *env, jobject obj, jlong address,
jlong len, jint numPages)
jlong len, jlong numPages)
{
jboolean loaded = JNI_TRUE;
int result = 0;
int i = 0;
long i = 0;
void *a = (void *) jlong_to_ptr(address);
mincore_vec_t* vec = NULL;
@ -70,7 +70,7 @@ Java_java_nio_MappedMemoryUtils_isLoaded0(JNIEnv *env, jobject obj, jlong addres
if ((long)pagesize == -1) {
return JNI_FALSE;
}
numPages = (jint) calculate_number_of_pages_in_range(a, len, pagesize);
numPages = (jlong) calculate_number_of_pages_in_range(a, len, pagesize);
#endif
/* Include space for one sentinel byte at the end of the buffer