Mercurial > hg > graal-jvmci-8
view src/os_cpu/solaris_x86/vm/assembler_solaris_x86_64.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 2004-2008 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_64.cpp.incl" void MacroAssembler::int3() { call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); } 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, fs:[0]; mov r, [r+tlsOffset] emit_byte(Assembler::FS_segment); movq(thread, Address(NULL, relocInfo::none)); movq(thread, Address(thread, ThreadLocalStorage::pd_getTlsOffset())); return; } else if (tlsMode == ThreadLocalStorage::pd_tlsAccessDirect) { // T2 // mov r, fs:[tlsOffset] emit_byte(Assembler::FS_segment); ExternalAddress tls_off((address) ThreadLocalStorage::pd_getTlsOffset()); movptr(thread, tls_off); return; } // slow call to of thr_getspecific // int thr_getspecific(thread_key_t key, void **value); // Consider using pthread_getspecific instead. if (thread != rax) { pushq(rax); } pushq(0); // space for return value pushq(rdi); pushq(rsi); leaq(rsi, Address(rsp, 16)); // pass return value address pushq(rdx); pushq(rcx); pushq(r8); pushq(r9); pushq(r10); // XXX movq(r10, rsp); andq(rsp, -16); pushq(r10); pushq(r11); movl(rdi, ThreadLocalStorage::thread_index()); call(RuntimeAddress(CAST_FROM_FN_PTR(address, thr_getspecific))); popq(r11); popq(rsp); popq(r10); popq(r9); popq(r8); popq(rcx); popq(rdx); popq(rsi); popq(rdi); popq(thread); // load return value if (thread != rax) { popq(rax); } }