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8359959: Test runtime/NMT/VirtualAllocTestType.java failed: '\\[0x[0]*7f7dc4043000 - 0x[0]*7f7dc4083000\\] reserved 256KB for Test' missing from stdout/stderr #25894

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8359959: Test runtime/NMT/VirtualAllocTestType.java failed: '\\[0x[0]*7f7dc4043000 - 0x[0]*7f7dc4083000\\] reserved 256KB for Test' missing from stdout/stderr #25894

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8359959: Test runtime/NMT/VirtualAllocTestType.java failed: '\\[0x[0]…
afshin-zafari Jun 19, 2025
5c90d0a
another approach.
afshin-zafari Jun 19, 2025
5579542
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afshin-zafari Jun 19, 2025
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27 changes: 21 additions & 6 deletions test/hotspot/jtreg/runtime/NMT/VirtualAllocTestType.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2013, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, 2025, 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
Expand Down Expand Up @@ -61,12 +61,27 @@ public static void main(String args[]) throws Exception {
addr2 = wb.NMTReserveMemory(reserveSize);
info = "reserve 2: addr2=" + addr2;

// If the second mapping happens to be adjacent to the first mapping, reserve another mapping and release the second mapping; for
// this test, we want to see two disjunct mappings.
if (addr2 == addr1 + reserveSize) {
// For this test, we want to see two disjunct mappings.
if ((addr2 == addr1 + reserveSize) || (addr2 == addr1 - reserveSize)) {
// <---r1---><---r2--->...<---tmp--->
// <---tmp--->...<---r1---><---r2--->
//
// Reserve a new region and find whether r1 or r2 to be released.
long tmp = wb.NMTReserveMemory(reserveSize);
wb.NMTReleaseMemory(addr2, reserveSize);
addr2 = tmp;
long r1 = addr1 < addr2 ? addr1 : addr2;
long r2 = addr1 > addr2 ? addr1 : addr2;
long tmp_end = tmp + reserveSize;
long r1_end = r1 + reserveSize;
long r2_end = r2 + reserveSize;
if (tmp >= r2_end) {
wb.NMTReleaseMemory(r2, reserveSize);
addr1 = r1;
addr2 = tmp;
} else if (tmp_end <= r1) {
wb.NMTReleaseMemory(r1, reserveSize);
addr1 = tmp;
addr2 = r2;
}
}

output = NMTTestUtils.startJcmdVMNativeMemoryDetail();
Expand Down