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[binutils-gdb.git] / gdb / unwind_stop_reasons.def
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1 /* Copyright (C) 2011-2022 Free Software Foundation, Inc.
3 This file is part of GDB.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 /* Reasons why frames could not be further unwound
19 SET (name, description)
21 After this reason name, all reasons should be considered errors;
22 i.e.: abnormal stack termination.
23 FIRST_ERROR (name)
25 First and Last reason defined
26 FIRST_ENTRY (name)
27 LAST_ENTRY (name) */
29 #ifdef SET
30 /* No particular reason; either we haven't tried unwinding yet,
31 or we didn't fail. */
32 SET (UNWIND_NO_REASON, "no reason")
34 /* This is no longer used anywhere, but it's kept because it's exposed
35 to Python. This is how GDB used to indicate end of stack. We've
36 now migrated to a model where frames always have a valid ID. */
37 SET (UNWIND_NULL_ID, "unwinder did not report frame ID")
39 /* This frame is the outermost. */
40 SET (UNWIND_OUTERMOST, "outermost")
42 /* Can't unwind further, because that would require knowing the
43 values of registers or memory that haven't been collected. */
44 SET (UNWIND_UNAVAILABLE, \
45 "not enough registers or memory available to unwind further")
47 /* This frame ID looks like it ought to belong to a NEXT frame,
48 but we got it for a PREV frame. Normally, this is a sign of
49 unwinder failure. It could also indicate stack corruption. */
50 SET (UNWIND_INNER_ID, "previous frame inner to this frame (corrupt stack?)")
52 /* This frame has the same ID as the previous one. That means
53 that unwinding further would almost certainly give us another
54 frame with exactly the same ID, so break the chain. Normally,
55 this is a sign of unwinder failure. It could also indicate
56 stack corruption. */
57 SET (UNWIND_SAME_ID, "previous frame identical to this frame (corrupt stack?)")
59 /* The frame unwinder didn't find any saved PC, but we needed
60 one to unwind further. */
61 SET (UNWIND_NO_SAVED_PC, "frame did not save the PC")
63 /* There was an error accessing memory while unwinding this frame. */
64 SET (UNWIND_MEMORY_ERROR, "memory error while unwinding")
66 #endif /* SET */
69 #ifdef FIRST_ERROR
70 FIRST_ERROR (UNWIND_UNAVAILABLE)
71 #endif
73 #ifdef FIRST_ENTRY
74 FIRST_ENTRY (UNWIND_NO_REASON)
75 #endif
77 #ifdef LAST_ENTRY
78 LAST_ENTRY (UNWIND_MEMORY_ERROR)
79 #endif