Mercurial > hg > graal-jvmci-8
view src/os_cpu/solaris_x86/vm/assembler_solaris_x86_32.cpp @ 237:1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
Summary: allocate alignment-sized page(s) below java heap so that memory accesses at heap_base+1page give signal and cause an implicit null check
Reviewed-by: kvn, jmasa, phh, jcoomes
author | coleenp |
---|---|
date | Sat, 19 Jul 2008 17:38:22 -0400 |
parents | d1605aabd0a1 |
children |
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/* * Copyright 1999-2008 Sun Microsystems, Inc. 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 * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ #include "incls/_precompiled.incl" #include "incls/_assembler_solaris_x86_32.cpp.incl" void MacroAssembler::int3() { pushl(rax); pushl(rdx); pushl(rcx); call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); popl(rcx); popl(rdx); popl(rax); } void MacroAssembler::get_thread(Register thread) { // Try to emit a Solaris-specific fast TSD/TLS accessor. ThreadLocalStorage::pd_tlsAccessMode tlsMode = ThreadLocalStorage::pd_getTlsAccessMode () ; if (tlsMode == ThreadLocalStorage::pd_tlsAccessIndirect) { // T1 // Use thread as a temporary: mov r, gs:[0]; mov r, [r+tlsOffset] emit_byte (Assembler::GS_segment) ; // ExternalAddress doesn't work because it can't take NULL AddressLiteral null(0, relocInfo::none); movptr (thread, null); movl (thread, Address(thread, ThreadLocalStorage::pd_getTlsOffset())) ; return ; } else if (tlsMode == ThreadLocalStorage::pd_tlsAccessDirect) { // T2 // mov r, gs:[tlsOffset] emit_byte (Assembler::GS_segment) ; AddressLiteral tls((address)ThreadLocalStorage::pd_getTlsOffset(), relocInfo::none); movptr (thread, tls); return ; } // slow call to of thr_getspecific // int thr_getspecific(thread_key_t key, void **value); // Consider using pthread_getspecific instead. pushl(0); // allocate space for return value if (thread != rax) pushl(rax); // save rax, if caller still wants it pushl(rcx); // save caller save pushl(rdx); // save caller save if (thread != rax) { leal(thread, Address(rsp, 3 * sizeof(int))); // address of return value } else { leal(thread, Address(rsp, 2 * sizeof(int))); // address of return value } pushl(thread); // and pass the address pushl(ThreadLocalStorage::thread_index()); // the key call(RuntimeAddress(CAST_FROM_FN_PTR(address, thr_getspecific))); increment(rsp, 2 * wordSize); popl(rdx); popl(rcx); if (thread != rax) popl(rax); popl(thread); }