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src/os_cpu/bsd_x86/vm/bytes_bsd_x86.inline.hpp@758935f7c23f (annotated)

src/os_cpu/bsd_x86/vm/bytes_bsd_x86.inline.hpp

Fri, 08 Feb 2013 12:48:24 +0100

author

sla

date

Fri, 08 Feb 2013 12:48:24 +0100

changeset 4564

758935f7c23f

parent 4229

0af5da0c9d9d

child 6876

710a3c8b516e

permissions

-rw-r--r--

8006423: SA: NullPointerException in sun.jvm.hotspot.debugger.bsd.BsdThread.getContext(BsdThread.java:67)
Summary: Do not rely on mach thread port names to identify threads from SA
Reviewed-by: dholmes, minqi, rbackman

never@3156	1	/*
never@3156	2	* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
never@3156	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@3156	4	*
never@3156	5	* This code is free software; you can redistribute it and/or modify it
never@3156	6	* under the terms of the GNU General Public License version 2 only, as
never@3156	7	* published by the Free Software Foundation.
never@3156	8	*
never@3156	9	* This code is distributed in the hope that it will be useful, but WITHOUT
never@3156	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@3156	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@3156	12	* version 2 for more details (a copy is included in the LICENSE file that
never@3156	13	* accompanied this code).
never@3156	14	*
never@3156	15	* You should have received a copy of the GNU General Public License version
never@3156	16	* 2 along with this work; if not, write to the Free Software Foundation,
never@3156	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@3156	18	*
never@3156	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
never@3156	20	* or visit www.oracle.com if you need additional information or have any
never@3156	21	* questions.
never@3156	22	*
never@3156	23	*/
never@3156	24
never@3156	25	#ifndef OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP
never@3156	26	#define OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP
never@3156	27
never@3156	28	#ifdef __APPLE__
never@3156	29	#include <libkern/OSByteOrder.h>
never@3156	30	#endif
never@3156	31
never@3156	32	#if defined(AMD64)
never@3156	33	# if defined(__APPLE__)
never@3156	34	# define bswap_16(x) OSSwapInt16(x)
never@3156	35	# define bswap_32(x) OSSwapInt32(x)
never@3156	36	# define bswap_64(x) OSSwapInt64(x)
never@3156	37	# elif defined(__OpenBSD__)
never@3156	38	# define bswap_16(x) swap16(x)
never@3156	39	# define bswap_32(x) swap32(x)
never@3156	40	# define bswap_64(x) swap64(x)
never@3156	41	# elif defined(__NetBSD__)
never@3156	42	# define bswap_16(x) bswap16(x)
never@3156	43	# define bswap_32(x) bswap32(x)
never@3156	44	# define bswap_64(x) bswap64(x)
never@3156	45	# else
never@3156	46	# define bswap_16(x) __bswap16(x)
never@3156	47	# define bswap_32(x) __bswap32(x)
never@3156	48	# define bswap_64(x) __bswap64(x)
never@3156	49	# endif
never@3156	50	#endif
never@3156	51
never@3156	52	// Efficient swapping of data bytes from Java byte
never@3156	53	// ordering to native byte ordering and vice versa.
never@3156	54	inline u2 Bytes::swap_u2(u2 x) {
never@3156	55	#ifdef AMD64
never@3156	56	return bswap_16(x);
never@3156	57	#else
never@3156	58	u2 ret;
never@3156	59	__asm__ __volatile__ (
never@3156	60	"movw %0, %%ax;"
never@3156	61	"xchg %%al, %%ah;"
never@3156	62	"movw %%ax, %0"
never@3156	63	:"=r" (ret) // output : register 0 => ret
never@3156	64	:"0" (x) // input : x => register 0
never@3156	65	:"ax", "0" // clobbered registers
never@3156	66	);
never@3156	67	return ret;
never@3156	68	#endif // AMD64
never@3156	69	}
never@3156	70
never@3156	71	inline u4 Bytes::swap_u4(u4 x) {
never@3156	72	#ifdef AMD64
never@3156	73	return bswap_32(x);
never@3156	74	#else
never@3156	75	u4 ret;
never@3156	76	__asm__ __volatile__ (
never@3156	77	"bswap %0"
never@3156	78	:"=r" (ret) // output : register 0 => ret
never@3156	79	:"0" (x) // input : x => register 0
never@3156	80	:"0" // clobbered register
never@3156	81	);
never@3156	82	return ret;
never@3156	83	#endif // AMD64
never@3156	84	}
never@3156	85
never@3156	86	#ifdef AMD64
never@3156	87	inline u8 Bytes::swap_u8(u8 x) {
never@3156	88	#ifdef SPARC_WORKS
never@3156	89	// workaround for SunStudio12 CR6615391
never@3156	90	__asm__ __volatile__ (
never@3156	91	"bswapq %0"
never@3156	92	:"=r" (x) // output : register 0 => x
never@3156	93	:"0" (x) // input : x => register 0
never@3156	94	:"0" // clobbered register
never@3156	95	);
never@3156	96	return x;
never@3156	97	#else
never@3156	98	return bswap_64(x);
never@3156	99	#endif
never@3156	100	}
never@3156	101	#else
never@3156	102	// Helper function for swap_u8
never@3156	103	inline u8 Bytes::swap_u8_base(u4 x, u4 y) {
never@3156	104	return (((u8)swap_u4(x))<<32) | swap_u4(y);
never@3156	105	}
never@3156	106
never@3156	107	inline u8 Bytes::swap_u8(u8 x) {
never@3156	108	return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1));
never@3156	109	}
never@3156	110	#endif // !AMD64
never@3156	111
never@3156	112	#endif // OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP