stan/jdk-24
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

8248271: linux-x86-zero build failure

Browse Source 
Reviewed-by: dholmes
This commit is contained in:
Coleen Phillimore 2020-06-25 08:01:17 -04:00
parent 233cac3232
commit 06cea107ef
1 changed files with 14 additions and 1 deletions

15
src/hotspot/os_cpu/linux_zero/os_linux_zero.hpp

@ -1,5 +1,5 @@
/*
* Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright 2007, 2008, 2010, 2018, Red Hat, Inc.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
@ -34,6 +34,19 @@
// Note: Currently only used in 64 bit Windows implementations
static bool register_code_area(char *low, char *high) { return true; }
/*
* Work-around for broken NX emulation using CS limit, Red Hat patch "Exec-Shield"
* (IA32 only).
*
* Map and execute at a high VA to prevent CS lazy updates race with SMP MM
* invalidation.Further code generation by the JVM will no longer cause CS limit
* updates.
*
* Affects IA32: RHEL 5 & 6, Ubuntu 10.04 (LTS), 10.10, 11.04, 11.10, 12.04.
* @see JDK-8023956
*/
static void workaround_expand_exec_shield_cs_limit();
// Atomically copy 64 bits of data
static void atomic_copy64(const volatile void *src, volatile void *dst) {
#if defined(PPC32) && !defined(__SPE__)