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src/os_cpu/linux_x86/vm/thread_linux_x86.cpp@f03d0a26bf83 (annotated)

src/os_cpu/linux_x86/vm/thread_linux_x86.cpp

Thu, 22 Apr 2010 13:23:15 -0700

author

jcoomes

date

Thu, 22 Apr 2010 13:23:15 -0700

changeset 1845

f03d0a26bf83

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6888954: argument formatting for assert() and friends
Reviewed-by: kvn, twisti, apetrusenko, never, dcubed

duke@435	1	/*
duke@435	2	* Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	#include "incls/_precompiled.incl"
duke@435	26	#include "incls/_thread_linux_x86.cpp.incl"
duke@435	27
duke@435	28	// For Forte Analyzer AsyncGetCallTrace profiling support - thread is
duke@435	29	// currently interrupted by SIGPROF
duke@435	30	bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
duke@435	31	void* ucontext, bool isInJava) {
duke@435	32
duke@435	33	assert(Thread::current() == this, "caller must be current thread");
duke@435	34	assert(this->is_Java_thread(), "must be JavaThread");
duke@435	35
duke@435	36	JavaThread* jt = (JavaThread *)this;
duke@435	37
duke@435	38	// If we have a last_Java_frame, then we should use it even if
duke@435	39	// isInJava == true. It should be more reliable than ucontext info.
duke@435	40	if (jt->has_last_Java_frame()) {
duke@435	41	*fr_addr = jt->pd_last_frame();
duke@435	42	return true;
duke@435	43	}
duke@435	44
duke@435	45	// At this point, we don't have a last_Java_frame, so
duke@435	46	// we try to glean some information out of the ucontext
duke@435	47	// if we were running Java code when SIGPROF came in.
duke@435	48	if (isInJava) {
duke@435	49	ucontext_t* uc = (ucontext_t*) ucontext;
duke@435	50
duke@435	51	intptr_t* ret_fp;
duke@435	52	intptr_t* ret_sp;
duke@435	53	ExtendedPC addr = os::Linux::fetch_frame_from_ucontext(this, uc,
duke@435	54	&ret_sp, &ret_fp);
duke@435	55	if (addr.pc() == NULL || ret_sp == NULL ) {
duke@435	56	// ucontext wasn't useful
duke@435	57	return false;
duke@435	58	}
duke@435	59
duke@435	60	frame ret_frame(ret_sp, ret_fp, addr.pc());
duke@435	61	if (!ret_frame.safe_for_sender(jt)) {
duke@435	62	#ifdef COMPILER2
duke@435	63	// C2 uses ebp as a general register see if NULL fp helps
duke@435	64	frame ret_frame2(ret_sp, NULL, addr.pc());
duke@435	65	if (!ret_frame2.safe_for_sender(jt)) {
duke@435	66	// nothing else to try if the frame isn't good
duke@435	67	return false;
duke@435	68	}
duke@435	69	ret_frame = ret_frame2;
duke@435	70	#else
duke@435	71	// nothing else to try if the frame isn't good
duke@435	72	return false;
duke@435	73	#endif /* COMPILER2 */
duke@435	74	}
duke@435	75	*fr_addr = ret_frame;
duke@435	76	return true;
duke@435	77	}
duke@435	78
duke@435	79	// nothing else to try
duke@435	80	return false;
duke@435	81	}