Rizin is a fork of Radare2 with almost near perfect command compatibility with r2. Any r2 related plugins need to be replaced with their rz counter parts. Solves #1566
Before this fix, when we compiled a 32-bit prgoram a 'Bad register' bug
would show up on `fsbase` and `gsbase` commands.
Also, those commands weren't protected to not be executed on another
archs, which this commit fixes.
Additionally, this commit introduces 4 tests:
```
test_commands_segments[gsbase-gosample.x64] PASSED
test_commands_segments[gsbase-gosample.x86] PASSED
test_commands_segments[fsbase-gosample.x64] PASSED
test_commands_segments[fsbase-gosample.x86] PASSED
```
Two of those tests, the ones with x86 binaries, applied without other changes would fail.
* gdbinit.py: fix message when locales are wrong
Apparently the suggested solution is not great:
```
nix@33843c903468:~$ locale -a
C
C.UTF-8
POSIX
en_US.utf8
nix@33843c903468:~$ LC_ALL=en_US.UTF-8 PYTHONIOENCODING=UTF-8 pwndbg
/nix/store/qqa28hmysc23yy081d178jfd9a1yk8aw-bash-5.2-p15/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
******
Your encoding (ANSI_X3.4-1968) is different than UTF-8. pwndbg might not work properly.
You might try launching gdb with:
LC_ALL=en_US.UTF-8 PYTHONIOENCODING=UTF-8 gdb
Make sure that en_US.UTF-8 is activated in /etc/locale.gen and you called locale-gen
******
pwndbg: loaded 164 pwndbg commands and 42 shell commands. Type pwndbg [--shell | --all] [filter] for a list.
pwndbg: created $rebase, $ida gdb functions (can be used with print/break)
Traceback (most recent call last):
File "/nix/store/x2yncb885vd33dgigwfwc6qamjxs4d7h-pwndbg-2022.12.19/share/pwndbg/gdbinit.py", line 84, in <module>
import pwndbg # noqa: F401
File "/nix/store/x2yncb885vd33dgigwfwc6qamjxs4d7h-pwndbg-2022.12.19/share/pwndbg/pwndbg/__init__.py", line 113, in <module>
config_mod.init_params()
File "/nix/store/x2yncb885vd33dgigwfwc6qamjxs4d7h-pwndbg-2022.12.19/share/pwndbg/pwndbg/gdblib/config.py", line 114, in init_params
Parameter(p)
File "/nix/store/x2yncb885vd33dgigwfwc6qamjxs4d7h-pwndbg-2022.12.19/share/pwndbg/pwndbg/gdblib/config.py", line 46, in __init__
self.value = param.value
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-1: ordinal not in range(128)
------- tip of the day (disable with set show-tips off) -------
Use the procinfo command for better process introspection (than the GDB's info proc command)
pwndbg>
quit
nix@33843c903468:~$ LC_ALL=C.UTF-8 PYTHONIOENCODING=UTF-8 pwndbg
pwndbg: loaded 164 pwndbg commands and 42 shell commands. Type pwndbg [--shell | --all] [filter] for a list.
pwndbg: created $rebase, $ida gdb functions (can be used with print/break)
------- tip of the day (disable with set show-tips off) -------
Want to display each context panel in a separate tmux window? See https://github.com/pwndbg/pwndbg/blob/dev/FEATURES.md#splitting--layouting-context
pwndbg>
quit
nix@33843c903468:~$ LC_ALL=C.UTF-8 pwndbg
pwndbg: loaded 164 pwndbg commands and 42 shell commands. Type pwndbg [--shell | --all] [filter] for a list.
pwndbg: created $rebase, $ida gdb functions (can be used with print/break)
------- tip of the day (disable with set show-tips off) -------
Use the telescope command to dereference a given address/pointer multiple times (if the dereferenced value is a valid ptr; see config telescope to configure its behavior)
pwndbg>
quit
```
* fix lint
* Enhance the checks before accessing the memory
- Use `pwndbg.gdblib.memory.peek()` instead of `pwndbg.gdblib.vmmap.find()` to check if the address is valid
- Directly access the memory when searching the `main_arena` in memory and catch the exception
* Make finding `main_arena` in memory more efficient and reliable
We only try the address that is aligned to `pwndbg.gdblib.arch.ptrsize`
* Avoid unnecessary memory accessing if possible
- Before we used `pwndbg.gdblib.memory.peek()` to check if an address is readable for GDB, we used `pwndbg.gdblib.vmmap.find()` to make sure that this address is in one of the pages, since accessing memory for embedded targets might be slow and expensive
- Create a new function: `is_readable_address` for `pwndbg.gdblib.memory`
* Fix wrong test for `main_arena`
The heap object should be reset before testing the multi-threaded condition
* Add the test to make sure the heap heuristics won't be affected by the vmmap result
Previously, we used `pwndbg.gdblib.vmmap.find()` to check whether the address is valid or not, but this might be a false positive for the address in the `[vsyscall]` page or in the page with a range from 0~0xffffffffffffffff (e.g. qemu-user).
This commit aims to include this scenario during the tests, to make sure the heap heuristics won't be affected by this.
* Use `gdb.MemoryError` instead of `Exception`
* Fix#1534: disable emulation if mmap(1G,RWX) fails
TL:DR: Unicorn Engine aborts if mmap(1G, RWX) fails, so we are doing a
best effort check if we can do such allocation before using it for the
first time and if we can't, we disable it.
* add mmap.close() call
* Fix vermin lint
* Update pwndbg/commands/context.py
* Refactor TLS module
- Replace unreliable `__errno_location()` trick with `pthread_self()` to acquire TLS address
- Consolidate heap heuristics checks about TLS within the `pwndbg.gdblib.tls` module for better organization
* Bug fix for the `errno` command
Calling `__errno_location()` without locking the scheduler can cause another thread to inadvertently continue execution
* Refactor code about heap heuristics of thread-local variables
- Replace some checks with some functions in `pwndbg.gdblib.tls`
- Try to find tcache with `mp_.sbrk_base + 0x10` if the target is single-threaded
* Add tests for heap heuristics with multi-threaded
* Refacotr scheduler-locking related functions
- Move these functions into `pwndbg.gdblib.scheduler`
- Fetch the parameter value once (https://github.com/pwndbg/pwndbg/pull/1536#discussion_r1082549746)
* Avoid bug caused by GLIBC_TUNABLES
See https://github.com/pwndbg/pwndbg/pull/1536#discussion_r1083202815
* Add note about `set scheduler-locking on`
* Add comment for `lock_scheduler`
Co-authored-by: Disconnect3d <dominik.b.czarnota@gmail.com>
* Update DEVELOPING.md
Co-authored-by: Disconnect3d <dominik.b.czarnota@gmail.com>
This fixes memoize when debug=True is set in pwndbg/lib/memoize.py
Before this commit, one gets the following error:
```
dc@jhtc:~$ gdb
Executed: <stop-memoized function pwndbg.ida.available>(())
.... False
Traceback (most recent call last):
File "/home/dc/pwndbg/gdbinit.py", line 100, in <module>
import pwndbg # noqa: F401
File "/home/dc/pwndbg/pwndbg/__init__.py", line 11, in <module>
load_commands()
File "/home/dc/pwndbg/pwndbg/commands/__init__.py", line 601, in load_commands
import pwndbg.commands.cymbol
File "/home/dc/pwndbg/pwndbg/commands/cymbol.py", line 53, in <module>
pwndbg_cachedir = pwndbg.lib.tempfile.cachedir("custom-symbols")
File "/home/dc/pwndbg/pwndbg/lib/memoize.py", line 52, in __call__
print("%s: %s(%r)" % (how, self, args))
File "/home/dc/pwndbg/pwndbg/lib/memoize.py", line 58, in __repr__
return "<%s-memoized function %s>" % (self.kind, funcname)
AttributeError: 'forever' object has no attribute 'kind'
/home/dc/.gdbinit:12: Error in sourced command file:
No symbol table is loaded. Use the "file" command.
```
Maria
Disconnect3d
Alan Li
Gulshan Singh
CptGibbon