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7107135: Stack guard pages are no more protected after loading a shared library with executable stack

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Detect the execstack attribute of the loaded library and attempt to fix the stack guard using Safepoint op.

Reviewed-by: dholmes, zgu
This commit is contained in:
Ioi Lam 2013-03-05 13:55:56 -08:00 • committed by Ioi Lam
parent 112317dbe3
commit 5116181e1f
13 changed files with 464 additions and 3 deletions
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5
hotspot/src/os/linux/vm/globals_linux.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 2013, 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
@ -40,6 +40,9 @@
product(bool, UseHugeTLBFS, false, \
"Use MAP_HUGETLB for large pages") \
\
product(bool, LoadExecStackDllInVMThread, true, \
"Load DLLs with executable-stack attribute in the VM Thread") \
\
product(bool, UseSHM, false, \
"Use SYSV shared memory for large pages")