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src/os_cpu/bsd_x86/vm/thread_bsd_x86.cpp@95a08233f46c (annotated)
src/os_cpu/bsd_x86/vm/thread_bsd_x86.cpp
Mon, 28 May 2018 10:33:52 +0800
- author
- aoqi
- date
- Mon, 28 May 2018 10:33:52 +0800
- changeset 9041
- 95a08233f46c
- parent 8877
- f04097176542
- parent 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
Merge
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #include "precompiled.hpp" |
| aoqi@0 | 26 | #include "runtime/frame.inline.hpp" |
| aoqi@0 | 27 | #include "runtime/thread.inline.hpp" |
| aoqi@0 | 28 | |
| aoqi@0 | 29 | // For Forte Analyzer AsyncGetCallTrace profiling support - thread is |
| aoqi@0 | 30 | // currently interrupted by SIGPROF |
| aoqi@0 | 31 | bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, |
| aoqi@0 | 32 | void* ucontext, bool isInJava) { |
| aoqi@0 | 33 | assert(Thread::current() == this, "caller must be current thread"); |
| aoqi@0 | 34 | return pd_get_top_frame(fr_addr, ucontext, isInJava); |
| aoqi@0 | 35 | } |
| aoqi@0 | 36 | |
| aoqi@0 | 37 | bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) { |
| aoqi@0 | 38 | return pd_get_top_frame(fr_addr, ucontext, isInJava); |
| aoqi@0 | 39 | } |
| aoqi@0 | 40 | |
| aoqi@0 | 41 | bool JavaThread::pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava) { |
| aoqi@0 | 42 | assert(this->is_Java_thread(), "must be JavaThread"); |
| aoqi@0 | 43 | JavaThread* jt = (JavaThread *)this; |
| aoqi@0 | 44 | |
| aoqi@0 | 45 | // If we have a last_Java_frame, then we should use it even if |
| aoqi@0 | 46 | // isInJava == true. It should be more reliable than ucontext info. |
| kevinw@8877 | 47 | if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) { |
| aoqi@0 | 48 | *fr_addr = jt->pd_last_frame(); |
| aoqi@0 | 49 | return true; |
| aoqi@0 | 50 | } |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | // At this point, we don't have a last_Java_frame, so |
| aoqi@0 | 53 | // we try to glean some information out of the ucontext |
| aoqi@0 | 54 | // if we were running Java code when SIGPROF came in. |
| aoqi@0 | 55 | if (isInJava) { |
| aoqi@0 | 56 | ucontext_t* uc = (ucontext_t*) ucontext; |
| aoqi@0 | 57 | |
| aoqi@0 | 58 | intptr_t* ret_fp; |
| aoqi@0 | 59 | intptr_t* ret_sp; |
| aoqi@0 | 60 | ExtendedPC addr = os::Bsd::fetch_frame_from_ucontext(this, uc, |
| aoqi@0 | 61 | &ret_sp, &ret_fp); |
| aoqi@0 | 62 | if (addr.pc() == NULL || ret_sp == NULL ) { |
| aoqi@0 | 63 | // ucontext wasn't useful |
| aoqi@0 | 64 | return false; |
| aoqi@0 | 65 | } |
| aoqi@0 | 66 | |
| aoqi@0 | 67 | frame ret_frame(ret_sp, ret_fp, addr.pc()); |
| aoqi@0 | 68 | if (!ret_frame.safe_for_sender(jt)) { |
| aoqi@0 | 69 | #ifdef COMPILER2 |
| aoqi@0 | 70 | // C2 uses ebp as a general register see if NULL fp helps |
| aoqi@0 | 71 | frame ret_frame2(ret_sp, NULL, addr.pc()); |
| aoqi@0 | 72 | if (!ret_frame2.safe_for_sender(jt)) { |
| aoqi@0 | 73 | // nothing else to try if the frame isn't good |
| aoqi@0 | 74 | return false; |
| aoqi@0 | 75 | } |
| aoqi@0 | 76 | ret_frame = ret_frame2; |
| aoqi@0 | 77 | #else |
| aoqi@0 | 78 | // nothing else to try if the frame isn't good |
| aoqi@0 | 79 | return false; |
| aoqi@0 | 80 | #endif /* COMPILER2 */ |
| aoqi@0 | 81 | } |
| aoqi@0 | 82 | *fr_addr = ret_frame; |
| aoqi@0 | 83 | return true; |
| aoqi@0 | 84 | } |
| aoqi@0 | 85 | |
| aoqi@0 | 86 | // nothing else to try |
| aoqi@0 | 87 | return false; |
| aoqi@0 | 88 | } |
| aoqi@0 | 89 | |
| aoqi@0 | 90 | void JavaThread::cache_global_variables() { } |
