Mercurial > hg > graal-compiler
diff src/os_cpu/linux_sparc/vm/thread_linux_sparc.cpp @ 133:435e64505015
6693457: Open-source hotspot linux-sparc support
Summary: Move os_cpu/linux_sparc from closed to open
Reviewed-by: kamg
author | phh |
---|---|
date | Thu, 24 Apr 2008 15:07:57 -0400 |
parents | |
children | d1605aabd0a1 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os_cpu/linux_sparc/vm/thread_linux_sparc.cpp Thu Apr 24 15:07:57 2008 -0400 @@ -0,0 +1,107 @@ +/* + * Copyright 2003-2004 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/_thread_linux_sparc.cpp.incl" + +// For Forte Analyzer AsyncGetCallTrace profiling support - thread is +// currently interrupted by SIGPROF +bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, + void* ucontext, + bool isInJava) { + assert(Thread::current() == this, "caller must be current thread"); + assert(this->is_Java_thread(), "must be JavaThread"); + + JavaThread* jt = (JavaThread *)this; + + if (!isInJava) { + // make_walkable flushes register windows and grabs last_Java_pc + // which can not be done if the ucontext sp matches last_Java_sp + // stack walking utilities assume last_Java_pc set if marked flushed + jt->frame_anchor()->make_walkable(jt); + } + + // If we have a walkable last_Java_frame, then we should use it + // even if isInJava == true. It should be more reliable than + // ucontext info. + if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) { + *fr_addr = jt->pd_last_frame(); + return true; + } + + ucontext_t* uc = (ucontext_t*) ucontext; + + // At this point, we don't have a walkable last_Java_frame, so + // we try to glean some information out of the ucontext. + intptr_t* ret_sp; + ExtendedPC addr = + os::fetch_frame_from_context(uc, &ret_sp, + NULL /* ret_fp only used on X86 */); + if (addr.pc() == NULL || ret_sp == NULL) { + // ucontext wasn't useful + return false; + } + + // we were running Java code when SIGPROF came in + if (isInJava) { + // If we have a last_Java_sp, then the SIGPROF signal caught us + // right when we were transitioning from _thread_in_Java to a new + // JavaThreadState. We use last_Java_sp instead of the sp from + // the ucontext since it should be more reliable. + if (jt->has_last_Java_frame()) { + ret_sp = jt->last_Java_sp(); + } + // Implied else: we don't have a last_Java_sp so we use what we + // got from the ucontext. + + frame ret_frame(ret_sp, frame::unpatchable, addr.pc()); + if (!ret_frame.safe_for_sender(jt)) { + // nothing else to try if the frame isn't good + return false; + } + *fr_addr = ret_frame; + return true; + } + + // At this point, we know we weren't running Java code. We might + // have a last_Java_sp, but we don't have a walkable frame. + // However, we might still be able to construct something useful + // if the thread was running native code. + if (jt->has_last_Java_frame()) { + assert(!jt->frame_anchor()->walkable(), "case covered above"); + + if (jt->thread_state() == _thread_in_native) { + frame ret_frame(jt->last_Java_sp(), frame::unpatchable, addr.pc()); + if (!ret_frame.safe_for_sender(jt)) { + // nothing else to try if the frame isn't good + return false; + } + *fr_addr = ret_frame; + return true; + } + } + + // nothing else to try + return false; +}