thread_windows_x86.cpp revision 9111:a41fe5ffa839 
1/*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "runtime/frame.inline.hpp"
27#include "runtime/thread.inline.hpp"
28
29// For Forte Analyzer AsyncGetCallTrace profiling support - thread is
30// currently interrupted by SIGPROF
31bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
32  void* ucontext, bool isInJava) {
33
34  assert(Thread::current() == this, "caller must be current thread");
35  return pd_get_top_frame(fr_addr, ucontext, isInJava);
36}
37
38bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
39  return pd_get_top_frame(fr_addr, ucontext, isInJava);
40}
41
42bool JavaThread::pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava) {
43
44  assert(this->is_Java_thread(), "must be JavaThread");
45
46  JavaThread* jt = (JavaThread *)this;
47
48  // If we have a last_Java_frame, then we should use it even if
49  // isInJava == true.  It should be more reliable than CONTEXT info.
50  if (jt->has_last_Java_frame()) {
51    *fr_addr = jt->pd_last_frame();
52    return true;
53  }
54
55  // At this point, we don't have a last_Java_frame, so
56  // we try to glean some information out of the CONTEXT
57  // if we were running Java code when SIGPROF came in.
58  if (isInJava) {
59    CONTEXT* uc = (CONTEXT*)ucontext;
60
61#ifdef AMD64
62    intptr_t* ret_fp = (intptr_t*) uc->Rbp;
63    intptr_t* ret_sp = (intptr_t*) uc->Rsp;
64    ExtendedPC addr = ExtendedPC((address)uc->Rip);
65#else
66    intptr_t* ret_fp = (intptr_t*) uc->Ebp;
67    intptr_t* ret_sp = (intptr_t*) uc->Esp;
68    ExtendedPC addr = ExtendedPC((address)uc->Eip);
69#endif // AMD64
70    if (addr.pc() == NULL || ret_sp == NULL ) {
71      // CONTEXT wasn't useful
72      return false;
73    }
74
75    frame ret_frame(ret_sp, ret_fp, addr.pc());
76    if (!ret_frame.safe_for_sender(jt)) {
77#if defined(COMPILER2) || INCLUDE_JVMCI
78      // C2 and JVMCI use ebp as a general register see if NULL fp helps
79      frame ret_frame2(ret_sp, NULL, addr.pc());
80      if (!ret_frame2.safe_for_sender(jt)) {
81        // nothing else to try if the frame isn't good
82        return false;
83      }
84      ret_frame = ret_frame2;
85#else
86      // nothing else to try if the frame isn't good
87      return false;
88#endif /* COMPILER2 || INCLUDE_JVMCI */
89    }
90    *fr_addr = ret_frame;
91    return true;
92  }
93
94  // nothing else to try
95  return false;
96}
97
98void JavaThread::cache_global_variables() { }
99