• file
• revisions
• annotate
• diff
• comparison
• raw

src/os_cpu/bsd_x86/vm/thread_bsd_x86.cpp@f08d439fab8c (annotated)

src/os_cpu/bsd_x86/vm/thread_bsd_x86.cpp

Sun, 25 Sep 2011 16:03:29 -0700

author

never

date

Sun, 25 Sep 2011 16:03:29 -0700

changeset 3156

f08d439fab8c

child 4299

f34d701e952e

permissions

-rw-r--r--

7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>

never@3156	1	/*
never@3156	2	* Copyright (c) 2003, 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	#include "precompiled.hpp"
never@3156	26	#include "runtime/frame.inline.hpp"
never@3156	27	#include "thread_bsd.inline.hpp"
never@3156	28
never@3156	29	// For Forte Analyzer AsyncGetCallTrace profiling support - thread is
never@3156	30	// currently interrupted by SIGPROF
never@3156	31	bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
never@3156	32	void* ucontext, bool isInJava) {
never@3156	33
never@3156	34	assert(Thread::current() == this, "caller must be current thread");
never@3156	35	assert(this->is_Java_thread(), "must be JavaThread");
never@3156	36
never@3156	37	JavaThread* jt = (JavaThread *)this;
never@3156	38
never@3156	39	// If we have a last_Java_frame, then we should use it even if
never@3156	40	// isInJava == true. It should be more reliable than ucontext info.
never@3156	41	if (jt->has_last_Java_frame()) {
never@3156	42	*fr_addr = jt->pd_last_frame();
never@3156	43	return true;
never@3156	44	}
never@3156	45
never@3156	46	// At this point, we don't have a last_Java_frame, so
never@3156	47	// we try to glean some information out of the ucontext
never@3156	48	// if we were running Java code when SIGPROF came in.
never@3156	49	if (isInJava) {
never@3156	50	ucontext_t* uc = (ucontext_t*) ucontext;
never@3156	51
never@3156	52	intptr_t* ret_fp;
never@3156	53	intptr_t* ret_sp;
never@3156	54	ExtendedPC addr = os::Bsd::fetch_frame_from_ucontext(this, uc,
never@3156	55	&ret_sp, &ret_fp);
never@3156	56	if (addr.pc() == NULL || ret_sp == NULL ) {
never@3156	57	// ucontext wasn't useful
never@3156	58	return false;
never@3156	59	}
never@3156	60
never@3156	61	frame ret_frame(ret_sp, ret_fp, addr.pc());
never@3156	62	if (!ret_frame.safe_for_sender(jt)) {
never@3156	63	#ifdef COMPILER2
never@3156	64	// C2 uses ebp as a general register see if NULL fp helps
never@3156	65	frame ret_frame2(ret_sp, NULL, addr.pc());
never@3156	66	if (!ret_frame2.safe_for_sender(jt)) {
never@3156	67	// nothing else to try if the frame isn't good
never@3156	68	return false;
never@3156	69	}
never@3156	70	ret_frame = ret_frame2;
never@3156	71	#else
never@3156	72	// nothing else to try if the frame isn't good
never@3156	73	return false;
never@3156	74	#endif /* COMPILER2 */
never@3156	75	}
never@3156	76	*fr_addr = ret_frame;
never@3156	77	return true;
never@3156	78	}
never@3156	79
never@3156	80	// nothing else to try
never@3156	81	return false;
never@3156	82	}
never@3156	83
never@3156	84	void JavaThread::cache_global_variables() { }