equal
deleted
inserted
replaced
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()) { |