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* bpo-43963: Add _signal module state (GH-25676)Victor Stinner2021-04-281-84/+153
| | | | | | | | | | | | | * Add signal_state_t structure and signal_global_state variable. * Add a module state to the _signal module. * Move and rename variables: * DefaultHandler becomes state->default_handler * IgnoreHandler becomes state->ignore_handler * sigint_event becomes state->sigint_event * ItimerError becomes modstate->itimer_error * Rename SetHandler() to set_handler() to be consistent with get_handler().
* bpo-43963: Fix import _signal in subinterpreters (GH-25674)Victor Stinner2021-04-271-27/+41
| | | | | | | Importing the _signal module in a subinterpreter has no longer side effects. signal_module_exec() no longer modifies Handlers and no longer attempts to set SIGINT signal handler in subinterpreters.
* bpo-43356: Allow passing a signal number to interrupt_main() (GH-24755)Antoine Pitrou2021-03-111-30/+45
| | | | Also introduce a new C API ``PyErr_SetInterruptEx(int signum)``.
* bpo-43406: Fix possible race condition where ``PyErr_CheckSignals`` tries to ↵Antoine Pitrou2021-03-051-1/+25
| | | | | | execute a non-Python signal handler (GH-24756) We can receive signals (at the C level, in `trip_signal()` in signalmodule.c) while `signal.signal` is being called to modify the corresponding handler. Later when `PyErr_CheckSignals()` is called to handle the given signal, the handler may be a non-callable object and would raise a cryptic asynchronous exception.
* bpo-31904: Support signal module on VxWorks (GH-23391)pxinwr2020-11-301-0/+4
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* bpo-41713: Port _signal module to multi-phase init (GH-23355)Victor Stinner2020-11-171-16/+17
| | | | | | Port the _signal extension module to the multi-phase initialization API (PEP 489). Co-Authored-By: Mohamed Koubaa <koubaa.m@gmail.com>
* bpo-41686: Move _Py_RestoreSignals() to signalmodule.c (GH-23353)Victor Stinner2020-11-171-0/+23
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* bpo-41686: Refactor signal_exec() (GH-23346)Victor Stinner2020-11-171-158/+125
| | | | | | * Add signal_add_constants() function and add ADD_INT_MACRO macro. * The Python SIGINT handler is now installed at the end of signal_exec(). * Use Py_NewRef().
* bpo-41686: Always create the SIGINT event on Windows (GH-23344)Victor Stinner2020-11-171-53/+87
| | | | | | | | | | | | | | bpo-41686, bpo-41713: On Windows, the SIGINT event, _PyOS_SigintEvent(), is now created even if Python is configured to not install signal handlers (PyConfig.install_signal_handlers=0 or Py_InitializeEx(0)). Changes: * Move global variables initialization from signal_exec() to _PySignal_Init() to clarify that they are global variables cleared by _PySignal_Fini(). * _PySignal_Fini() now closes sigint_event. * IntHandler is no longer a global variable.
* bpo-41713: Remove PyOS_InitInterrupts() function (GH-23342)Victor Stinner2020-11-171-12/+25
| | | | | | | Remove the undocumented PyOS_InitInterrupts() C function. * Rename PyOS_InitInterrupts() to _PySignal_Init(). It now installs other signal handlers, not only SIGINT. * Rename PyOS_FiniInterrupts() to _PySignal_Fini()
* bpo-42006: Stop using PyDict_GetItem, PyDict_GetItemString and ↵Serhiy Storchaka2020-10-261-2/+1
| | | | | | | | | | | _PyDict_GetItemId. (GH-22648) These functions are considered not safe because they suppress all internal errors and can return wrong result. PyDict_GetItemString and _PyDict_GetItemId can also silence current exception in rare cases. Remove no longer used _PyDict_GetItemId. Add _PyDict_ContainsId and rename _PyDict_Contains into _PyDict_Contains_KnownHash.
* bpo-41713: _signal doesn't use multi-phase init (GH-22087)Victor Stinner2020-09-041-7/+13
| | | | | Partially revert commit 71d1bd9569c8a497e279f2fea6fe47cd70a87ea3: don't use multi-phase initialization (PEP 489) for the _signal extension module.
* bpo-1635741: Port _signal module to multi-phase init (PEP 489) (GH-22049)Mohamed Koubaa2020-09-031-82/+86
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* bpo-41675: Modernize siginterrupt calls (GH-22028)Pablo Galindo2020-09-021-1/+13
| | | | | | siginterrupt is deprecated: ./Modules/signalmodule.c:667:5: warning: ‘siginterrupt’ is deprecated: Use sigaction with SA_RESTART instead [-Wdeprecated-declarations] 667 | if (siginterrupt(signalnum, flag)<0) {
* bpo-41146: Convert signal.default_int_handler() to Argument Clinic (GH-21197)Serhiy Storchaka2020-07-121-8/+15
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* bpo-40826: Add _PyOS_InterruptOccurred(tstate) function (GH-20599)Victor Stinner2020-06-031-2/+12
| | | | | | | | | | | | my_fgets() now calls _PyOS_InterruptOccurred(tstate) to check for pending signals, rather calling PyOS_InterruptOccurred(). my_fgets() is called with the GIL released, whereas PyOS_InterruptOccurred() must be called with the GIL held. test_repl: use text=True and avoid SuppressCrashReport in test_multiline_string_parsing(). Fix my_fgets() on Windows: fgets(fp) does crash if fileno(fp) is closed.
* PyOS_AfterFork_Child() uses PyStatus (GH-20596)Victor Stinner2020-06-021-3/+8
| | | | | | | | PyOS_AfterFork_Child() helper functions now return a PyStatus: PyOS_AfterFork_Child() is now responsible to handle errors. * Move _PySignal_AfterFork() to the internal C API * Add #ifdef HAVE_FORK on _PyGILState_Reinit(), _PySignal_AfterFork() and _PyInterpreterState_DeleteExceptMain().
* bpo-40826: PyOS_InterruptOccurred() requires GIL (GH-20578)Victor Stinner2020-06-011-2/+3
| | | | PyOS_InterruptOccurred() now fails with a fatal error if it is called with the GIL released.
* bpo-40268: Remove explicit pythread.h includes (#19529)Victor Stinner2020-04-151-2/+0
| | | | Remove explicit pythread.h includes: it is always included by Python.h.
* bpo-40268: Remove a few pycore_pystate.h includes (GH-19510)Victor Stinner2020-04-141-1/+1
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* bpo-40268: Rename _PyInterpreterState_GET_UNSAFE() (GH-19509)Victor Stinner2020-04-141-2/+2
| | | | | | | Rename _PyInterpreterState_GET_UNSAFE() to _PyInterpreterState_GET() for consistency with _PyThreadState_GET() and to have a shorter name (help to fit into 80 columns). Add also "assert(tstate != NULL);" to the function.
* bpo-40082: trip_signal() uses the main interpreter (GH-19441)Victor Stinner2020-04-081-15/+12
| | | | | | | | | | | | | | | | | | | | | | Fix the signal handler: it now always uses the main interpreter, rather than trying to get the current Python thread state. The following function now accepts an interpreter, instead of a Python thread state: * _PyEval_SignalReceived() * _Py_ThreadCanHandleSignals() * _PyEval_AddPendingCall() * COMPUTE_EVAL_BREAKER() * SET_GIL_DROP_REQUEST(), RESET_GIL_DROP_REQUEST() * SIGNAL_PENDING_CALLS(), UNSIGNAL_PENDING_CALLS() * SIGNAL_PENDING_SIGNALS(), UNSIGNAL_PENDING_SIGNALS() * SIGNAL_ASYNC_EXC(), UNSIGNAL_ASYNC_EXC() Py_AddPendingCall() now uses the main interpreter if it fails to the current Python thread state. Convert _PyThreadState_GET() and PyInterpreterState_GET_UNSAFE() macros to static inline functions.
* bpo-38644: Pass tstate explicitly in signalmodule.c (GH-19184)Victor Stinner2020-03-261-63/+89
| | | | PyOS_InterruptOccurred() now checks _Py_ThreadCanHandleSignals() before checking if SIGINT is tripped.
* bpo-40010: COMPUTE_EVAL_BREAKER() checks for subinterpreter (GH-19087)Victor Stinner2020-03-201-17/+12
| | | | | | | | | COMPUTE_EVAL_BREAKER() now also checks if the Python thread state belongs to the main interpreter. Don't break the evaluation loop if there are pending signals but the Python thread state it belongs to a subinterpeter. * Add _Py_IsMainThread() function. * Add _Py_ThreadCanHandleSignals() function.
* bpo-39984: Move pending calls to PyInterpreterState (GH-19066)Victor Stinner2020-03-191-2/+2
| | | | | | | | | | | | | | | | | If Py_AddPendingCall() is called in a subinterpreter, the function is now scheduled to be called from the subinterpreter, rather than being called from the main interpreter. Each subinterpreter now has its own list of scheduled calls. * Move pending and eval_breaker fields from _PyRuntimeState.ceval to PyInterpreterState.ceval. * new_interpreter() now calls _PyEval_InitThreads() to create pending calls lock. * Fix Py_AddPendingCall() for subinterpreters. It now calls _PyThreadState_GET() which works in a subinterpreter if the caller holds the GIL, and only falls back on PyGILState_GetThisThreadState() if _PyThreadState_GET() returns NULL.
* bpo-39984: trip_signal() uses PyGILState_GetThisThreadState() (GH-19061)Victor Stinner2020-03-181-5/+9
| | | | | | | | | | | bpo-37127, bpo-39984: * trip_signal() and Py_AddPendingCall() now get the current Python thread state using PyGILState_GetThisThreadState() rather than _PyRuntimeState_GetThreadState() to be able to get it even if the GIL is released. * _PyEval_SignalReceived() now expects tstate rather than ceval. * Remove ceval parameter of _PyEval_AddPendingCall(): ceval is now get from tstate parameter.
* bpo-39184: Add audit events to functions in `fcntl`, `msvcrt`, `os`, ↵Saiyang Gou2020-02-131-0/+4
| | | | `resource`, `shutil`, `signal`, `syslog` (GH-18407)
* closes bpo-38712: Add signal.pidfd_send_signal. (GH-17070)Benjamin Peterson2019-11-201-0/+36
| | | | | | | | This exposes a Linux-specific syscall for sending a signal to a process identified by a file descriptor rather than a pid. For simplicity, we don't support the siginfo_t parameter to the syscall. This parameter allows implementing a pidfd version of rt_sigqueueinfo(2), which Python also doesn't support.
* bpo-38037: Fix reference counters in signal module (GH-15753)animalize2019-09-091-8/+17
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* bpo-29548: no longer use PyEval_Call* functions (GH-14683)Jeroen Demeyer2019-07-111-2/+1
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* Revert "bpo-33608: Factor out a private, per-interpreter ↵Victor Stinner2019-06-031-10/+2
| | | | | _Py_AddPendingCall(). (gh-13714)" (GH-13780) This reverts commit 6a150bcaeb190d1731b38ab9c7a5d1a352847ddc.
* bpo-33608: Factor out a private, per-interpreter _Py_AddPendingCall(). ↵Eric Snow2019-06-011-2/+10
| | | | (gh-13714)
* bpo-36710: Add tstate parameter in ceval.c (GH-13547)Victor Stinner2019-05-241-2/+3
| | | | | | | | | | | | | | | | * Fix a possible reference leak in _PyErr_Print() if exception is NULL. * PyErr_BadInternalCall(): replace PyErr_Format() with _PyErr_SetString(). * Add pycore_pyerrors.h header file. * New functions: * _PyErr_Clear() * _PyErr_Fetch() * _PyErr_Print() * _PyErr_Restore() * _PyErr_SetObject() * _PyErr_SetString() * Add 'tstate' parameter to _PyEval_AddPendingCall().
* bpo-37031: Reuse _PyRuntime.main_thread in signalmodule.c (GH-13538)Victor Stinner2019-05-241-16/+16
| | | | | | | | | | Remove main_thread and main_interp variables from signalmodule.c: reuse _PyRuntime which already track the main thread and the main interpreter. * Remove #include <sys/types.h> which became useless: getpid() call has been removed. * Add runtime argument to is_main() * is_main() now gets the interpreter from runtime.
* bpo-23395: Fix PyErr_SetInterrupt if the SIGINT signal is ignored or not ↵Matěj Cepl2019-05-231-4/+9
| | | | | handled (GH-7778) ``_thread.interrupt_main()`` now avoids setting the Python error status if the ``SIGINT`` signal is ignored or not handled by Python.
* bpo-36710: Add 'ceval' local variable to ceval.c (GH-12934)Victor Stinner2019-05-101-9/+14
| | | | | | | | | | | | | | | | | | | | | | | | | Add "struct _ceval_runtime_state *ceval = &_PyRuntime.ceval;" local variables to function to better highlight the dependency on the global variable _PyRuntime and to point directly to _PyRuntime.ceval field rather than on the larger _PyRuntime. Changes: * Add _PyRuntimeState_GetThreadState(runtime) macro. * Add _PyEval_AddPendingCall(ceval, ...) and _PyThreadState_Swap(gilstate, ...) functions. * _PyThreadState_GET() macro now calls _PyRuntimeState_GetThreadState() using &_PyRuntime. * Add 'ceval' parameter to COMPUTE_EVAL_BREAKER(), SIGNAL_PENDING_SIGNALS(), _PyEval_SignalAsyncExc(), _PyEval_SignalReceived() and _PyEval_FiniThreads() macros and functions. * Add 'tstate' parameter to call_function(), do_call_core() and do_raise(). * Add 'runtime' parameter to _Py_CURRENTLY_FINALIZING(), _Py_FinishPendingCalls() and _PyThreadState_DeleteExcept() macros and functions. * Declare 'runtime', 'tstate', 'ceval' and 'eval_breaker' variables as constant.
* bpo-36601: clarify signal handler comment and remove unnecessary pid check. ↵Jeroen Demeyer2019-05-101-15/+10
| | | | | (GH-12784) https://bugs.python.org/issue36601
* bpo-24011: Use PyModule_Add{Object,IntMacro} in PyInit__signal() (GH-12765)Joannah Nanjekye2019-04-221-7/+5
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* bpo-33608: Revert "Factor out a private, per-interpreter ↵Eric Snow2019-04-121-9/+4
| | | | | _Py_AddPendingCall()." (gh-12806) This reverts commit f13c5c8b9401a9dc19e95d8b420ee100ac022208 (gh-12360).
* bpo-33608: Factor out a private, per-interpreter _Py_AddPendingCall(). ↵Eric Snow2019-04-121-4/+9
| | | | | (gh-12360) This is effectively an un-revert of #11617 and #12024 (reverted in #12159). Portions of those were merged in other PRs (with lower risk) and this represents the remainder. Note that I found 3 different bugs in the original PRs and have fixed them here.
* bpo-31904: Adapt the _signal module to VxWorks RTOS (GH-12304)pxinwr2019-03-131-0/+7
| | | Limited signal fields in VxWorks.
* Revert: bpo-33608: Factor out a private, per-interpreter ↵Victor Stinner2019-03-041-9/+4
| | | | | | | | | | | | | | | | | | | _Py_AddPendingCall(). (GH-11617) (GH-12159) * Revert "bpo-36097: Use only public C-API in the_xxsubinterpreters module (adding as necessary). (#12003)" This reverts commit bcfa450f210074e16feb761ae5b3e966a2532fcf. * Revert "bpo-33608: Simplify ceval's DISPATCH by hoisting eval_breaker ahead of time. (gh-12062)" This reverts commit bda918bf65a88560ec453aaba0758a9c0d49b449. * Revert "bpo-33608: Use _Py_AddPendingCall() in _PyCrossInterpreterData_Release(). (gh-12024)" This reverts commit b05b711a2cef6c6c381e01069dedac372e0b9fb2. * Revert "bpo-33608: Factor out a private, per-interpreter _Py_AddPendingCall(). (GH-11617)" This reverts commit ef4ac967e2f3a9a18330cc6abe14adb4bc3d0465.
* bpo-33608: Factor out a private, per-interpreter _Py_AddPendingCall(). ↵Eric Snow2019-02-241-4/+9
| | | | | | | (GH-11617) This involves moving the global "pending calls" state to PyInterpreterState. https://bugs.python.org/issue33608
* bpo-35724: Explicitly require the main interpreter for signal-handling. ↵Eric Snow2019-02-231-8/+28
| | | | | | | (GH-11530) Ensure that the main interpreter is active (in the main thread) for signal-handling operations. This is increasingly relevant as people use subinterpreters more. https://bugs.python.org/issue35724
* bpo-35423: Stop using the "pending calls" machinery for signals. (gh-10972)Eric Snow2019-01-111-0/+6
| | | | | This change separates the signal handling trigger in the eval loop from the "pending calls" machinery. There is no semantic change and the difference in performance is insignificant. The change makes both components less confusing. It also eliminates the risk of changes to the pending calls affecting signal handling. This is particularly relevant for some upcoming pending calls changes I have in the works.
* bpo-35568: add 'raise_signal' function (GH-11335)Vladimir Matveev2019-01-081-0/+26
| | | | | | As in title, expose C `raise` function as `raise_function` in `signal` module. Also drop existing `raise_signal` in `_testcapi` module and replace all usages with new function. https://bugs.python.org/issue35568
* bpo-33012: Fix invalid function cast warnings with gcc 8. (GH-6749)Serhiy Storchaka2018-11-271-1/+1
| | | | | | Fix invalid function cast warnings with gcc 8 for method conventions different from METH_NOARGS, METH_O and METH_VARARGS excluding Argument Clinic generated code.
* bpo-35081: Add pycore_ prefix to internal header files (GH-10263)Victor Stinner2018-10-311-1/+1
| | | | | | | | | | | | | | | | | | | | * Rename Include/internal/ header files: * pyatomic.h -> pycore_atomic.h * ceval.h -> pycore_ceval.h * condvar.h -> pycore_condvar.h * context.h -> pycore_context.h * pygetopt.h -> pycore_getopt.h * gil.h -> pycore_gil.h * hamt.h -> pycore_hamt.h * hash.h -> pycore_hash.h * mem.h -> pycore_mem.h * pystate.h -> pycore_state.h * warnings.h -> pycore_warnings.h * PCbuild project, Makefile.pre.in, Modules/Setup: add the Include/internal/ directory to the search paths of header files. * Update includes. For example, replace #include "internal/mem.h" with #include "pycore_mem.h".
* bpo-35081: Move Include/pyatomic.c to Include/internal/ (GH-10239)Victor Stinner2018-10-301-0/+2
| | | Add pyatomic.h to the VS project (it wasn't referenced).
* bpo-34412: Make signal.strsignal() work on HP-UX (GH-8786)Michael Osipov2018-08-231-2/+20
| | | | | | Introduce a configure check for strsignal(3) which defines HAVE_STRSIGNAL for signalmodule.c. Add some common signals on HP-UX. This change applies for Windows and HP-UX.
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