Mercurial > hg > truffle
annotate src/os_cpu/solaris_sparc/vm/thread_solaris_sparc.cpp @ 3612:ed3ac862d22d
IdealGraphVisualizer: make Graal graph-to-text converter work again after last commit by copying properties that have the same value in the two input graphs groups to the newly created diff group's properties.
| author | Peter Hofer <peter.hofer@jku.at> |
|---|---|
| date | Wed, 02 Nov 2011 17:27:31 +0100 |
| parents | f95d63e2154a |
| children | f34d701e952e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "runtime/frame.inline.hpp" | |
| 27 #include "thread_solaris.inline.hpp" | |
| 0 | 28 |
| 29 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is | |
| 30 // currently interrupted by SIGPROF | |
| 31 // | |
| 32 // NOTE: On Solaris, register windows are flushed in the signal handler | |
| 33 // except for possibly the top frame. | |
| 34 // | |
| 35 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, | |
| 36 void* ucontext, bool isInJava) { | |
| 37 | |
| 38 assert(Thread::current() == this, "caller must be current thread"); | |
| 39 assert(this->is_Java_thread(), "must be JavaThread"); | |
| 40 | |
| 41 JavaThread* jt = (JavaThread *)this; | |
| 42 | |
| 43 if (!isInJava) { | |
| 44 // make_walkable flushes register windows and grabs last_Java_pc | |
| 45 // which can not be done if the ucontext sp matches last_Java_sp | |
| 46 // stack walking utilities assume last_Java_pc set if marked flushed | |
| 47 jt->frame_anchor()->make_walkable(jt); | |
| 48 } | |
| 49 | |
| 50 // If we have a walkable last_Java_frame, then we should use it | |
| 51 // even if isInJava == true. It should be more reliable than | |
| 52 // ucontext info. | |
| 53 if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) { | |
| 54 *fr_addr = jt->pd_last_frame(); | |
| 55 return true; | |
| 56 } | |
| 57 | |
| 58 ucontext_t* uc = (ucontext_t*) ucontext; | |
| 59 | |
| 60 // At this point, we don't have a walkable last_Java_frame, so | |
| 61 // we try to glean some information out of the ucontext. | |
| 62 intptr_t* ret_sp; | |
| 63 ExtendedPC addr = os::Solaris::fetch_frame_from_ucontext(this, uc, | |
| 64 &ret_sp, NULL /* ret_fp only used on Solaris X86 */); | |
| 65 if (addr.pc() == NULL || ret_sp == NULL) { | |
| 66 // ucontext wasn't useful | |
| 67 return false; | |
| 68 } | |
| 69 | |
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70 frame ret_frame(ret_sp, frame::unpatchable, addr.pc()); |
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71 |
| 0 | 72 // we were running Java code when SIGPROF came in |
| 73 if (isInJava) { | |
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74 |
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75 |
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76 // If the frame we got is safe then it is most certainly valid |
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77 if (ret_frame.safe_for_sender(jt)) { |
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78 *fr_addr = ret_frame; |
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79 return true; |
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80 } |
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81 |
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82 // If it isn't safe then we can try several things to try and get |
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83 // a good starting point. |
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84 // |
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85 // On sparc the frames are almost certainly walkable in the sense |
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86 // of sp/fp linkages. However because of recycling of windows if |
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87 // a piece of code does multiple save's where the initial save creates |
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88 // a real frame with a return pc and the succeeding save's are used to |
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89 // simply get free registers and have no real pc then the pc linkage on these |
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90 // "inner" temporary frames will be bogus. |
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91 // Since there is in general only a nesting level like |
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92 // this one deep in general we'll try and unwind such an "inner" frame |
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93 // here ourselves and see if it makes sense |
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94 |
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95 frame unwind_frame(ret_frame.fp(), frame::unpatchable, addr.pc()); |
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96 |
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97 if (unwind_frame.safe_for_sender(jt)) { |
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98 *fr_addr = unwind_frame; |
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99 return true; |
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100 } |
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101 |
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102 // Well that didn't work. Most likely we're toast on this tick |
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103 // The previous code would try this. I think it is dubious in light |
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104 // of changes to safe_for_sender and the unwind trick above but |
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105 // if it gets us a safe frame who wants to argue. |
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106 |
| 0 | 107 // If we have a last_Java_sp, then the SIGPROF signal caught us |
| 108 // right when we were transitioning from _thread_in_Java to a new | |
| 109 // JavaThreadState. We use last_Java_sp instead of the sp from | |
| 110 // the ucontext since it should be more reliable. | |
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111 |
| 0 | 112 if (jt->has_last_Java_frame()) { |
| 113 ret_sp = jt->last_Java_sp(); | |
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114 frame ret_frame2(ret_sp, frame::unpatchable, addr.pc()); |
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115 if (ret_frame2.safe_for_sender(jt)) { |
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116 *fr_addr = ret_frame2; |
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117 return true; |
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118 } |
| 0 | 119 } |
| 120 | |
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121 // This is the best we can do. We will only be able to decode the top frame |
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122 |
| 0 | 123 *fr_addr = ret_frame; |
| 124 return true; | |
| 125 } | |
| 126 | |
| 127 // At this point, we know we weren't running Java code. We might | |
| 128 // have a last_Java_sp, but we don't have a walkable frame. | |
| 129 // However, we might still be able to construct something useful | |
| 130 // if the thread was running native code. | |
| 131 if (jt->has_last_Java_frame()) { | |
| 132 assert(!jt->frame_anchor()->walkable(), "case covered above"); | |
| 133 | |
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134 frame ret_frame(jt->last_Java_sp(), frame::unpatchable, addr.pc()); |
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135 *fr_addr = ret_frame; |
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136 return true; |
| 0 | 137 } |
| 138 | |
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139 // nothing else to try but what we found initially |
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140 |
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141 *fr_addr = ret_frame; |
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142 return true; |
| 0 | 143 } |
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144 |
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145 void JavaThread::cache_global_variables() { } |
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146 |