Issue running attachp gdb-tests

[gsingh93]

I don't know why this isn't showing up on CI, but for months now I haven't been able to run ./tests.sh locally without the process being backgrounded and stopped. I can consistently reproduce with:

~/code/pwndbg attachp-tests*                                                                                                                                                                                  gsgx@gsgx-desktop 11:01:06 PM
❯ ./tests.sh -v test_attachp_command_attaches_to_procname_resolve_none
ZIGPATH set to /home/gsgx/code/pwndbg/.zig
[+] Building tls.i386.c
/home/gsgx/code/pwndbg/.zig/zig cc \
-Wall -DDEBUG=1 -ggdb -O0 -gdwarf-4 \
-target i386-linux-gnu \
-o tls.i386.out tls.i386.c
[+] Building tls.x86-64.c
/home/gsgx/code/pwndbg/.zig/zig cc \
-Wall -DDEBUG=1 -ggdb -O0 -gdwarf-4 \
-target x86_64-linux-gnu \
-o tls.x86-64.out tls.x86-64.c
[+] Building initialized_heap_x64.out
/home/gsgx/code/pwndbg/.zig/zig cc \
-Wall -DDEBUG=1 -ggdb -O0 -gdwarf-4 \
-target x86_64-linux-gnu \
-o initialized_heap_x64.out initialized_heap.c
[+] Building initialized_heap_i386_big.out
/home/gsgx/code/pwndbg/.zig/zig cc \
-Wall -DDEBUG=1 -ggdb -O0 -gdwarf-4 \
-target i386-linux-gnu \
-o initialized_heap_i386_big.out initialized_heap.c
[+] Building onegadget.x86-64.out
/home/gsgx/code/pwndbg/.zig/zig cc \
-Wall -DDEBUG=1 -ggdb -O0 -gdwarf-4 \
-target x86_64-linux-gnu \
-o onegadget.x86-64.out onegadget.c
[+] Building onegadget.i386.out
/home/gsgx/code/pwndbg/.zig/zig cc \
-Wall -DDEBUG=1 -ggdb -O0 -gdwarf-4 \
-target i386-linux-gnu \
-o onegadget.i386.out onegadget.c

Running tests in parallel
zsh: suspended (tty input)  ./tests.sh -v test_attachp_command_attaches_to_procname_resolve_none

~/code/pwndbg attachp-tests*                                                                                                                                                                                  gsgx@gsgx-desktop 11:01:12 PM
❯ fg
[1]  + continued  ./tests.sh -v test_attachp_command_attaches_to_procname_resolve_none
test_attachp_command_attaches_to_procname_resolve_none                 PASSED

pwndbg: loaded 157 pwndbg commands and 47 shell commands. Type pwndbg [--shell | --all] [filter] for a list.
pwndbg: created $rebase, $base, $ida GDB functions (can be used with print/break)
Launching pytest with args: ['/home/gsgx/code/pwndbg/tests/gdb-tests/tests/test_attachp.py::test_attachp_command_attaches_to_procname_resolve_none', '-vvv', '-s', '--showlocals', '--color=yes']
=========================================================================================================== test session starts ============================================================================================================
platform linux -- Python 3.12.3, pytest-8.0.2, pluggy-1.5.0 -- /usr/bin/python
cachedir: .pytest_cache
rootdir: /home/gsgx/code/pwndbg/tests/gdb-tests
plugins: cov-4.1.0
collecting ... collected 1 item

tests/test_attachp.py::test_attachp_command_attaches_to_procname_resolve_none Launching command: ['gdb', '--silent', '--nx', '--nh', '--command', '../../gdbinit.py', '--eval-command', 'set attachp-resolution-method none', '--eval-command', 'attachp tmpsc6kuviy', '--eval-command', 'quit']
PASSED

============================================================================================================ 1 passed in 3.26s =============================================================================================================

test_attachp_command_attaches_to_procname_resolve_none_no_truncate     PASSED

pwndbg: loaded 157 pwndbg commands and 47 shell commands. Type pwndbg [--shell | --all] [filter] for a list.
pwndbg: created $rebase, $base, $ida GDB functions (can be used with print/break)
Launching pytest with args: ['/home/gsgx/code/pwndbg/tests/gdb-tests/tests/test_attachp.py::test_attachp_command_attaches_to_procname_resolve_none_no_truncate', '-vvv', '-s', '--showlocals', '--color=yes']
=========================================================================================================== test session starts ============================================================================================================
platform linux -- Python 3.12.3, pytest-8.0.2, pluggy-1.5.0 -- /usr/bin/python
cachedir: .pytest_cache
rootdir: /home/gsgx/code/pwndbg/tests/gdb-tests
plugins: cov-4.1.0
collecting ... collected 1 item

tests/test_attachp.py::test_attachp_command_attaches_to_procname_resolve_none_no_truncate Launching command: ['gdb', '--silent', '--nx', '--nh', '--command', '../../gdbinit.py', '--eval-command', 'set attachp-resolution-method none', '--eval-command', 'attachp --no-truncate tmp6g5q4pz5', '--eval-command', 'quit']
PASSED

============================================================================================================ 1 passed in 3.27s =============================================================================================================

Tests completed in 3 seconds

*********************************
********* TESTS SUMMARY *********
*********************************
Tests passed or skipped: 2
Tests failed: 0

Note the "zsh: suspended (tty input) ./tests.sh -v ". The same thing happens with bash. I thought it might be related to the parallel tests, but it still happens with ./tests.sh --serial.

(To reproduce you also need to run echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope)