Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/cpu/sparc/vm/frame_sparc.cpp
src/cpu/sparc/vm/frame_sparc.cpp
- changeset 4942
- f36e073d56a4
- parent 4645
- ec2eddfed950
- child 5237
- f2110083203d
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| 4940:b8b081e53312 | 4942:f36e073d56a4 |
|---|---|
| 1 /* | 1 /* |
| 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | 4 * |
| 5 * This code is free software; you can redistribute it and/or modify it | 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 | 6 * under the terms of the GNU General Public License version 2 only, as |
| 7 * published by the Free Software Foundation. | 7 * published by the Free Software Foundation. |
| 302 return false; | 302 return false; |
| 303 } | 303 } |
| 304 | 304 |
| 305 // The sender should positively be an nmethod or call_stub. On sparc we might in fact see something else. | 305 // The sender should positively be an nmethod or call_stub. On sparc we might in fact see something else. |
| 306 // The cause of this is because at a save instruction the O7 we get is a leftover from an earlier | 306 // The cause of this is because at a save instruction the O7 we get is a leftover from an earlier |
| 307 // window use. So if a runtime stub creates two frames (common in fastdebug/jvmg) then we see the | 307 // window use. So if a runtime stub creates two frames (common in fastdebug/debug) then we see the |
| 308 // stale pc. So if the sender blob is not something we'd expect we have little choice but to declare | 308 // stale pc. So if the sender blob is not something we'd expect we have little choice but to declare |
| 309 // the stack unwalkable. pd_get_top_frame_for_signal_handler tries to recover from this by unwinding | 309 // the stack unwalkable. pd_get_top_frame_for_signal_handler tries to recover from this by unwinding |
| 310 // that initial frame and retrying. | 310 // that initial frame and retrying. |
| 311 | 311 |
| 312 if (!sender_blob->is_nmethod()) { | 312 if (!sender_blob->is_nmethod()) { |
