projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 9fc501fd AB |
1 | # Copyright (C) 2020 Free Software Foundation, Inc. |
| 2 | ||
| 3 | # This program is free software; you can redistribute it and/or modify | |
| 4 | # it under the terms of the GNU General Public License as published by | |
| 5 | # the Free Software Foundation; either version 3 of the License, or | |
| 6 | # (at your option) any later version. | |
| 7 | # | |
| 8 | # This program is distributed in the hope that it will be useful, | |
| 9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 | # GNU General Public License for more details. | |
| 12 | # | |
| 13 | # You should have received a copy of the GNU General Public License | |
| 14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 15 | ||
| 16 | # A dummy stack unwinder used for testing the Python unwinders when we | |
| 17 | # have inline frames. This unwinder will never claim any frames, | |
| 18 | # instead, all it does it try to read all registers possible target | |
| 19 | # registers as part of the frame sniffing process.. | |
| 20 | ||
| 21 | import gdb | |
| 22 | from gdb.unwinder import Unwinder | |
| 23 | ||
| 24 | apb_global = None | |
| 25 | ||
| 26 | class dummy_unwinder (Unwinder): | |
| 27 | """ A dummy unwinder that looks at a bunch of registers as part of | |
| 28 | the unwinding process.""" | |
| 29 | ||
| 30 | class frame_id (object): | |
| 31 | """ Basic frame id.""" | |
| 32 | ||
| 33 | def __init__ (self, sp, pc): | |
| 34 | """ Create the frame id.""" | |
| 35 | self.sp = sp | |
| 36 | self.pc = pc | |
| 37 | ||
| 38 | def __init__ (self): | |
| 39 | """Create the unwinder.""" | |
| 40 | Unwinder.__init__ (self, "dummy stack unwinder") | |
| 41 | self.void_ptr_t = gdb.lookup_type("void").pointer() | |
| 42 | self.regs = None | |
| 43 | ||
| 44 | def get_regs (self, pending_frame): | |
| 45 | """Return a list of register names that should be read. Only | |
| 46 | gathers the list once, then caches the result.""" | |
| 47 | if (self.regs != None): | |
| 48 | return self.regs | |
| 49 | ||
| 50 | # Collect the names of all registers to read. | |
| 51 | self.regs = list (pending_frame.architecture () | |
| 52 | .register_names ()) | |
| 53 | ||
| 54 | return self.regs | |
| 55 | ||
| 56 | def __call__ (self, pending_frame): | |
| 57 | """Actually performs the unwind, or at least sniffs this frame | |
| 58 | to see if the unwinder should claim it, which is never does.""" | |
| 59 | try: | |
| 60 | for r in (self.get_regs (pending_frame)): | |
| 61 | v = pending_frame.read_register (r).cast (self.void_ptr_t) | |
| 62 | except: | |
| 63 | print ("Dummy unwinder, exception") | |
| 64 | raise | |
| 65 | ||
| 66 | return None | |
| 67 | ||
| 68 | # Register the ComRV stack unwinder. | |
| 69 | gdb.unwinder.register_unwinder (None, dummy_unwinder (), True) | |
| 70 | ||
| 71 | print ("Python script imported") |